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Manual</a></h1>
<h2 class="SUBTITLE">5 Oct 2004 (For ifhp-3.5.20)</h2>
<h3 class="AUTHOR"><a name="AEN5"></a>Patrick A Powell</h3>
<div class="AFFILIATION">
<div class="ADDRESS">
<p class="ADDRESS"><code class="EMAIL"><<a href=
"mailto:papowell@astart.com">papowell@astart.com</a>></code><br>
AStArt Technologies addr<br>
6741 Convoy Court,<br>
San Diego, CA 92111<br>
Phone 858-874-6543<br>
Fax 858-751-2435</p>
</div>
</div>
<p class="COPYRIGHT">Copyright © 2002 Patrick
Powell</p>
<div>
<div class="ABSTRACT">
<a name="AEN21"></a>
<p>The <b class="APPLICATION">ifhp</b> program is an
enhanced, extended, highly configurable, and portable
implementation of a print filter for use with the <b
class="APPLICATION">LPRng</b> Print spooler package.
<var class="LITERAL"><b class=
"APPLICATION">ifhp</b></var> supports network, serial,
and parallel printers, does page accounting and job
recovery, and allows an extremely high level of
configuration and tuning. <var class="LITERAL"><b
class="APPLICATION">ifhp</b></var> gets its flexibility
by using a configuration file to set its operational
characteristics. The configuration file can contain
multiple separate printer configurations and the
configuration selection is done by a very simple
command line option. The filter supports text,
PostScript, PCL, and PJL printers, and can be
configured to handle a wide range of printer quirks and
mis-implementations.</p>
</div>
</div>
<div class="LEGALNOTICE">
<a name="AEN18"></a>
<div class="IMPORTANT">
<blockquote class="IMPORTANT">
<p><b>Important:</b> THIS DOCUMENTATION AND THE
DESCRIBED SOFTWARE IS PROVIDED BY THE AUTHORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT
NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR
TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
ANY WAY OUT OF THE USE OF THIS DOCUMENTATION, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</p>
</blockquote>
</div>
</div>
<hr>
</div>
<div class="TOC">
<dl>
<dt><b>Table of Contents</b></dt>
<dt><a href="#AEN29">Preface</a></dt>
<dd>
<dl>
<dt>1. <a href="#AEN31">Introduction</a></dt>
<dt>2. <a href="#AEN38">Acknowledgements</a></dt>
<dt>3. <a href="#AEN43">Shell Prompts</a></dt>
<dt>4. <a href="#AEN62">Typographic
Conventions</a></dt>
<dt>5. <a href="#AEN111">Notes, warnings, and
examples</a></dt>
</dl>
</dd>
<dt>1. <a href="#AEN120">Introduction</a></dt>
<dd>
<dl>
<dt>1.1. <a href="#AEN153">Copyright and
Disclaimer</a></dt>
<dt>1.2. <a href="#AEN161">Commercial
Support</a></dt>
<dt>1.3. <a href="#AEN167">Web Site</a></dt>
<dt>1.4. <a href="#SECFTP">FTP Sites</a></dt>
<dt>1.5. <a href="#AEN207">Mailing List</a></dt>
<dt>1.6. <a href="#AEN214">PGP Public Key</a></dt>
</dl>
</dd>
<dt>2. <a href="#AEN221">Software Installation and
Configuration</a></dt>
<dd>
<dl>
<dt>2.1. <a href="#AEN235">Additional Recommended
Software</a></dt>
<dt>2.2. <a href="#AEN305">Installation</a></dt>
<dt>2.3. <a href="#MODELSELECTION">Printer Models
Supported</a></dt>
</dl>
</dd>
<dt>3. <a href="#AEN1670">Recommended -Z options for
Users</a></dt>
<dd>
<dl>
<dt>3.1. <a href="#AEN1675">Input Tray
Selection</a></dt>
<dt>3.2. <a href="#AEN1694">Output Bin
Selection</a></dt>
<dt>3.3. <a href="#AEN1712">Media Size (Paper)
Selection</a></dt>
<dt>3.4. <a href="#AEN1734">Media Type
Selection</a></dt>
<dt>3.5. <a href="#AEN1746">Duplex and
Simplex</a></dt>
<dt>3.6. <a href="#AEN1776">Copies</a></dt>
</dl>
</dd>
<dt>4. <a href="#AEN1787">Printer Capabilities,
Configurations, and Printcaps</a></dt>
<dd>
<dl>
<dt>4.1. <a href="#AEN1791">Printer
Configurations</a></dt>
<dt>4.2. <a href="#NETWORKPROTOCOLS">Network
Communication Protocols</a></dt>
<dt>4.3. <a href="#RFC1179PC">RFC1179 (BSD or TCP/IP)
Job Transfer Printcap Entry</a></dt>
<dt>4.4. <a href="#SOCKETPC">Socket Protocol (TCP/IP)
Operation Printcap Entry</a></dt>
<dt>4.5. <a href="#APPSOCKETPC">Appsocket Protocol
(TCP/IP) Operation</a></dt>
<dt>4.6. <a href="#SNMP">Using SNMP For Status
Information</a></dt>
<dt>4.7. <a href="#AEN2062">Common Print Server Boxes
Configuration Information</a></dt>
<dt>4.8. <a href="#AEN2222">Timeout Problems Sending
A Job</a></dt>
<dt>4.9. <a href="#RWTIMEOUT">Printers With Lockup
Problems</a></dt>
<dt>4.10. <a href="#AEN2246">PS, PCL, PJL Printer
with TPC/IP Network Interface</a></dt>
<dt>4.11. <a href="#AEN2266">PS, PCL, PJL Printer
with Parallel Port Connection</a></dt>
<dt>4.12. <a href="#AEN2279">PS, PCL, PJL Printer
with Serial Port</a></dt>
<dt>4.13. <a href="#PSONLY">PostScript Only
Printer</a></dt>
<dt>4.14. <a href="#AEN2320">GhostScript</a></dt>
<dt>4.15. <a href="#PHASER">Tektronics Phaser, QMS,
and Appsocket Protocol</a></dt>
</dl>
</dd>
<dt>5. <a href="#OPTIONS">Options and Arguments</a></dt>
<dd>
<dl>
<dt>5.1. <a href="#AEN2359">Command Line
Options</a></dt>
<dt>5.2. <a href="#CONFIG">General Configuration
Options - config, trace, debug</a></dt>
<dt>5.3. <a href="#STATUSFILE">Status
Messages</a></dt>
<dt>5.4. <a href="#STATUS">Printer Status Available -
status</a></dt>
<dt>5.5. <a href="#AEN2507">Monitoring Options -
sync, waitend, pagecount</a></dt>
<dt>5.6. <a href="#AEN2542">User -Z Option
Support</a></dt>
<dt>5.7. <a href="#AEN2673">Adding User
Options</a></dt>
<dt>5.8. <a href="#AEN2688">Initialization and Setup
Control</a></dt>
</dl>
</dd>
<dt>6. <a href="#AEN2718">Configuration File</a></dt>
<dd>
<dl>
<dt>6.1. <a href="#AEN2723">Configuration File
Entries</a></dt>
<dt>6.2. <a href="#AEN2731">Comments</a></dt>
<dt>6.3. <a href="#AEN2737">Option Setting</a></dt>
<dt>6.4. <a href="#AEN2761">Option Use</a></dt>
<dt>6.5. <a href="#AEN2766">List Expansion</a></dt>
<dt>6.6. <a href="#STRINGESCAPE">String Escape
Sequences</a></dt>
<dt>6.7. <a href="#AEN2888">Language Context and
Value Expansion</a></dt>
<dd>
<dl>
<dt>6.7.1. <a href="#AEN2895">PJL
Language</a></dt>
<dt>6.7.2. <a href="#AEN2930">PCL
Language</a></dt>
<dt>6.7.3. <a href="#AEN2945">PostScript
Language</a></dt>
</dl>
</dd>
<dt>6.8. <a href="#AEN2957">Printer Entries</a></dt>
<dt>6.9. <a href="#AEN2975">Include Facility</a></dt>
<dt>6.10. <a href="#AEN2979">tc Entry Inclusion
Facility</a></dt>
</dl>
</dd>
<dt>7. <a href="#DETAILS">Filter Operation
Details</a></dt>
<dd>
<dl>
<dt>7.1. <a href="#AEN2997">Filter
Pseudo-Code</a></dt>
<dt>7.2. <a href="#SETUP">Options, Initialization and
Setup</a></dt>
<dt>7.3. <a href="#LANGUAGES">Languages Supported-
pjl, pcl, ps, and text</a></dt>
<dd>
<dl>
<dt>7.3.1. <a href="#PJL-JOB">pjl_job
FLAG</a></dt>
<dt>7.3.2. <a href="#PJL-ENTER">pjl_enter
FLAG</a></dt>
<dt>7.3.3. <a href=
"#REMOVE-PJL-AT-START">remove_pjl_at_start
FLAG</a></dt>
<dt>7.3.4. <a href="#NULLPAD">nullpad
STRING</a></dt>
<dt>7.3.5. <a href="#PJL-CONSOLE">pjl_console
FLAG</a></dt>
<dt>7.3.6. <a href="#REMOVE-CTRL">remove_ctrl
STRING</a></dt>
<dt>7.3.7. <a href="#TBCP">tbcp FLAG</a></dt>
</dl>
</dd>
<dt>7.4. <a href="#SYNCPAGE">Synchronization and
Pagecounts</a></dt>
<dt>7.5. <a href="#PJLINIT">PJL
Initialization</a></dt>
<dt>7.6. <a href="#FILECONVERSION">File Conversion
Support</a></dt>
<dd>
<dl>
<dt>7.6.1. <a href="#FILE-UTIL-PATH">File Type
Detection</a></dt>
<dt>7.6.2. <a href=
"#CONVERSION">Conversion</a></dt>
<dt>7.6.3. <a href="#CRLF">LF to CR/LF
Conversion</a></dt>
<dt>7.6.4. <a href="#AEN3562">Text Treated Like
PCL</a></dt>
<dt>7.6.5. <a href="#AEN3568">Default to
Passthrough</a></dt>
</dl>
</dd>
<dt>7.7. <a href="#GHOSTSCRIPTCONFIG">GhostScript
Printer</a></dt>
<dt>7.8. <a href="#LANGUAGEINIT">Language Specific
Initialization</a></dt>
<dt>7.9. <a href="#FILETRANSFER">File Transfer and
Error Status Monitoring</a></dt>
<dt>7.10. <a href="#WAITEND">End of Job</a></dt>
<dt>7.11. <a href="#APPSOCKET">Tektronix Phaser, QMS
and AppSocket Support</a></dt>
</dl>
</dd>
<dt>8. <a href="#AEN3714">Banners and OF Mode
Operation</a></dt>
<dd>
<dl>
<dt>8.1. <a href="#AEN3734">No Banner</a></dt>
<dt>8.2. <a href="#AEN3742">Banner Printing and No OF
Filter</a></dt>
<dt>8.3. <a href="#AEN3752">Banner Printing With OF
Filter</a></dt>
<dt>8.4. <a href="#AEN3766"><b class=
"APPLICATION">LPRng</b> Options Controlling Banner
Printing</a></dt>
<dt>8.5. <a href="#OFOPTIONS">of_options
option</a></dt>
</dl>
</dd>
<dt>9. <a href="#AEN3797">Font Download Support</a></dt>
<dd>
<dl>
<dt>9.1. <a href="#AEN3803">PCL Font
Downloading</a></dt>
<dt>9.2. <a href="#AEN3829">PS Font
Downloading</a></dt>
<dt>9.3. <a href="#AEN3839">PJL File
Downloading</a></dt>
</dl>
</dd>
<dt>10. <a href="#AEN3848">Debugging and Problem
Solving</a></dt>
<dt>A. <a href="#IFHPOPTIONS">Index to Options</a></dt>
<dt>B. <a href="#AEN4236">HP JetDirect Card
Support</a></dt>
<dd>
<dl>
<dt>B.1. <a href="#AEN4239">MicroSoft JetDirect
Support</a></dt>
<dt>B.2. <a href="#AEN4242">TCP/IP Address</a></dt>
<dt>B.3. <a href="#AEN4247">Web Server
Configuration</a></dt>
<dt>B.4. <a href="#AEN4251">Telnet
Configuration</a></dt>
<dt>B.5. <a href="#AEN4258">BOOTP
Information</a></dt>
<dt>B.6. <a href="#AEN4266">Timeouts</a></dt>
</dl>
</dd>
</dl>
</div>
<div class="LOT">
<dl class="LOT">
<dt><b>List of Tables</b></dt>
<dt>2-1. <a href="#AEN310">Configure File Location
Variables</a></dt>
<dt>2-2. <a href="#AEN382">Executable and Configuration
File Locations</a></dt>
<dt>2-3. <a href="#CONFIGENTRIES"><var class=
"LITERAL">ifhp.conf</var> Configuration Entries</a></dt>
<dt>4-1. <a href="#NETWORKPRINTSERVERS">Network Print
Servers</a></dt>
<dt>A-1. <a href="#IFHPOPTIONSTABLE"><var class=
"LITERAL">ifhp.conf</var> - <b class=
"APPLICATION">ifhp</b> Options</a></dt>
</dl>
</div>
<div class="PREFACE">
<hr>
<h1><a name="AEN29"></a>Preface</h1>
<div class="SECT1">
<h2 class="SECT1"><a name="AEN31">1.
Introduction</a></h2>
<p>The <b class="APPLICATION">ifhp</b> Print Filter is
the primary print filter for the <b class=
"APPLICATION">LPRng</b> Print Spooler. This document is
designed to be the single basic reference for the <b
class="APPLICATION">ifhp</b> software; the <b class=
"APPLICATION">LPRng</b> software is distributed
separately and has additional documentation.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN38">2.
Acknowledgements</a></h2>
<p>I would like to thank all of the <b class=
"APPLICATION">LPRng</b> users who so relentlessly tried
the incredible number of permutations and combinations of
printers and software, and whose requests for <span
class="emphasis"><i class="EMPHASIS">just one more
feature</i></span> led to the development of the
software.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN43">3. Shell
Prompts</a></h2>
<p>The following table shows the default system prompt
and superuser prompt. The examples will use this prompt
to indicate which user you should be running the example
as.</p>
<div class="INFORMALTABLE">
<a name="AEN46"></a>
<table border="0" frame="void" class="CALSTABLE">
<col>
<col>
<thead>
<tr>
<th>User</th>
<th>Prompt</th>
</tr>
</thead>
<tbody>
<tr>
<td>Normal user</td>
<td><samp class="PROMPT">%</samp></td>
</tr>
<tr>
<td><var class="LITERAL">root</var></td>
<td><samp class="PROMPT">#</samp></td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN62">4. Typographic
Conventions</a></h2>
<p>The following table describes the typographic
conventions used in this book.</p>
<div class="INFORMALTABLE">
<a name="AEN65"></a>
<table border="0" frame="void" class="CALSTABLE">
<col>
<col>
<thead>
<tr>
<th>Meaning</th>
<th>Examples</th>
</tr>
</thead>
<tbody>
<tr>
<td>The name of commands, files, and directories.
On screen computer output.</td>
<td>
<p>Edit your <tt class="FILENAME">.login</tt>
file.</p>
<p>Use <tt class="COMMAND">ls -a</tt> to list
all files.</p>
<pre class="SCREEN">
You have mail.
</pre>
<br>
<br>
</td>
</tr>
<tr>
<td>What you type, when contrasted with on-screen
computer output.</td>
<td>
<pre class="SCREEN">
<samp class="PROMPT">%</samp> <kbd class="USERINPUT">su</kbd>
Password:
</pre>
</td>
</tr>
<tr>
<td>Manual page references.</td>
<td>Use <span class="CITEREFENTRY"><span class=
"REFENTRYTITLE">su</span>(1)</span> to change
user names.</td>
</tr>
<tr>
<td>User and group names</td>
<td>Only <var class="LITERAL">root</var> can do
this.</td>
</tr>
<tr>
<td>Emphasis</td>
<td>You <span class="emphasis"><i class=
"EMPHASIS">must</i></span> do this.</td>
</tr>
<tr>
<td>Command line variables; replace with the real
name or variable.</td>
<td>To delete a file, type <tt class="COMMAND">rm
<tt class="FILENAME"><var class=
"REPLACEABLE">filename</var></tt></tt></td>
</tr>
<tr>
<td>Environment variables</td>
<td><var class="ENVAR">$HOME</var> is your home
directory.</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN111">5. Notes, warnings,
and examples</a></h2>
<p>Within the text appear notes, warnings, and
examples.</p>
<div class="NOTE">
<blockquote class="NOTE">
<p><b>Note:</b> Notes are represented like this, and
contain information that you should take note of, as
it may affect what you do.</p>
</blockquote>
</div>
<div class="WARNING">
<blockquote class="WARNING">
<p><b>Warning</b>Warnings are represented like this,
and contain information warning you about possible
damage if you do not follow the instructions. This
damage may be physical, to your hardware or to you,
or it may be non-physical, such as the inadvertant
deletion of important files.</p>
</blockquote>
</div>
<div class="INFORMALEXAMPLE">
<a name="AEN118"></a>
<p>Examples are represented like this, and typically
contain examples you should walk through, or show you
what the results of a particular action should be.</p>
</div>
</div>
</div>
<div class="CHAPTER">
<hr>
<h1><a name="AEN120"></a>Chapter 1. Introduction</h1>
<p>The <b class="APPLICATION">ifhp</b> print filter is the
latest in a long evolutionary path of print filters for the
<b class="APPLICATION">LPRng</b> print spooler system. It
unifies the low level printer communication facilities and
provide a common code base for future development.</p>
<p>This document is the complete set of references and
installation guide for the <b class="APPLICATION">ifhp</b>
print filter. It covers compilation, installation, initial
testing, details of system configuration, and configuration
options that would be needed by the system administrator.
Previous releases of <b class="APPLICATION">ifhp</b> had a
large selection of <acronym class=
"ACRONYM">README</acronym> files which are now incorporated
into the IFHP Reference Manual.</p>
<p><a name="WEBSITE"></a> Information about <b class=
"APPLICATION">LPRng</b> and <b class="APPLICATION">ifhp</b>
can be found on the <b class="APPLICATION">LPRng</b> web
page <a href="http://www.lprng.com" target=
"_top">http://www.lprng.com</a>.</p>
<p><a name="MAILLIST"></a> There is mailing list for <b
class="APPLICATION">ifhp</b> and <b class=
"APPLICATION">LPRng</b> at <code class="EMAIL"><<a href=
"mailto:lprng@lprng.com">lprng@lprng.com</a>></code>. In
order to reduce the amount of unsolicited <span class=
"emphasis"><i class="EMPHASIS">spam</i></span> mail posted
to the list you must subscribe to the list before posting
to it. To subscribe, send email message to <span class=
"emphasis"><i class="EMPHASIS"><a href=
"mailto:lprng-request@lprng.com" target=
"_top">lprng-request@lprng.com</a></i></span>, with the
single word <span class="emphasis"><i class=
"EMPHASIS">subscribe</i></span> in the body.</p>
<p>Several presentations of <b class=
"APPLICATION">LPRng</b> and print spooling software have
been made at the Large Scale Installation Administrator
(LISA) conferences and are in the <b class=
"APPLICATION">ifhp</b> distribution and available on web
sites. The slides for the LISA 97 tutorial on <a href=
"ftp://ftp.lprng.com/pub/LPRng/LISA97.tgz" target=
"_top">Printers and Network Print Spooling</a> are the <tt
class="FILENAME">LISA97.ppt</tt> in the <b class=
"APPLICATION">LPRng</b> distribution.</p>
<p>During development of <b class="APPLICATION">ifhp</b>,
the following documents were invaluable references. For
Printer Job Language (PJL) related issues see the Printer
Job Language Technical Reference Manual, Hewlett Packard,
10th Edition, October 1997. For PCL related issues see the
PCL 5 Printer Language Technical Reference Manual, First
Edition, 1992. These manuals are available through the
Hewlett Packard Developers Program. See <a href=
"http://www.hp.com/go/devexchange" target=
"_top">http://www.hp.com/go/devexchange</a> for information
on how to join.</p>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN153">1.1. Copyright and
Disclaimer</a></h2>
<p>Material included in this document from the <b class=
"APPLICATION">ifhp</b> distribution Copyright Patrick
Powell 1988-1999, where applicable. The rights to
distribute this document complete or in part are hereby
granted for non-commercial purposes. Partial
reproductions must acknowledge the source. Permission to
distribute this file together with <b class=
"APPLICATION">LPRng</b>, <b class="APPLICATION">ifhp</b>
and `derived works' is explicitly granted.</p>
<p><span class="emphasis"><i class="EMPHASIS">THE
MATERIAL IN THIS DOCUMENT IS PROVIDED WITHOUT FEE AND
AS-IS WITH NO WARRANTY REGARDING FITNESS OF USE FOR ANY
PURPOSE. THE AUTHOR AND ALL CONTRIBUTORS ARE NOT LIABLE
FOR ANY DAMAGES, DIRECT OR INDIRECT, RESULTING FROM THE
USE OF INFORMATION PROVIDED IN THIS
DOCUMENT.</i></span></p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN161">1.2. Commercial
Support</a></h2>
<p><a href="http://www.astart.com" target="_top">AStArt
Technologies (http://www.astart.com)</a> provides
commercial support and enhancements for <b class=
"APPLICATION">LPRng</b>, <b class="APPLICATION">ifhp</b>,
and other network software. AStArt provides network and
system consulting services for UNIX and NT systems, as
well as real time and network software.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN167">1.3. Web Site</a></h2>
<p>Web Page: <a href="http://www.lprng.com" target=
"_top">http://www.lprng.com</a></p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="SECFTP">1.4. FTP
Sites</a></h2>
<p>Main FTP Site:</p>
<table border="0">
<tbody>
<tr>
<td><a href="ftp://ftp.lprng.com/pub/LPRng" target=
"_top">ftp://ftp.lprng.com/pub/LPRng</a> (US)</td>
</tr>
</tbody>
</table>
<br>
<br>
<p>Mirrors:</p>
<table border="0">
<tbody>
<tr>
<td><a href=
"ftp://ftp.u-aizu.ac.jp/pub/net/lpr/LPRng" target=
"_top">ftp://ftp.u-aizu.ac.jp/pub/net/lpr/LPRng</a>
(JA)</td>
</tr>
<tr>
<td><a href=
"ftp://ftp.cs.columbia.edu/pub/archives/pkg/LPRng"
target=
"_top">ftp://ftp.cs.columbia.edu/pub/archives/pkg/LPRng</a>
(US)</td>
</tr>
<tr>
<td><a href=
"ftp://ftp.cise.ufl.edu/pub/mirrors/LPRng" target=
"_top">ftp://ftp.cise.ufl.edu/pub/mirrors/LPRng</a>
(US)</td>
</tr>
<tr>
<td><a href="ftp://ftp.cs.umn.edu/pub/LPRng"
target="_top">ftp://ftp.cs.umn.edu/pub/LPRng</a>
(US)</td>
</tr>
<tr>
<td><a href=
"ftp://uiarchive.uiuc.edu/pub/ftp/ftp.lprng.com/pub/LPRng"
target=
"_top">ftp://uiarchive.uiuc.edu/pub/ftp/ftp.lprng.com/pub/LPRng</a>
(US)</td>
</tr>
<tr>
<td><a href=
"ftp://ftp.sage-au.org.au/pub/printing/spooler/lprng/"
target=
"_top">ftp://ftp.sage-au.org.au/pub/printing/spooler/lprng/</a>
(AU)</td>
</tr>
<tr>
<td><a href="ftp://mirror.aarnet.edu.au/pub/LPRng/"
target=
"_top">ftp://mirror.aarnet.edu.au/pub/LPRng/</a>
(AU/NZ)</td>
</tr>
<tr>
<td><a href=
"http://mirror.aarnet.edu.au/pub/LPRng/" target=
"_top">http://mirror.aarnet.edu.au/pub/LPRng/</a>
(AU/NZ)</td>
</tr>
<tr>
<td><a href=
"ftp://sunsite.ualberta.ca/pub/Mirror/LPRng"
target=
"_top">ftp://sunsite.ualberta.ca/pub/Mirror/LPRng</a>
(CA)</td>
</tr>
<tr>
<td><a href=
"ftp://ftp.informatik.uni-hamburg.de/pub/os/unix/utils/LPRng"
target=
"_top">ftp://ftp.informatik.uni-hamburg.de/pub/os/unix/utils/LPRng</a>
(DE)</td>
</tr>
<tr>
<td><a href=
"ftp://ftp.uni-paderborn.de/pub/unix/printer/LPRng"
target=
"_top">ftp://ftp.uni-paderborn.de/pub/unix/printer/LPRng</a>
(DE)</td>
</tr>
<tr>
<td><a href="ftp://ftp.mono.org/pub/LPRng" target=
"_top">ftp://ftp.mono.org/pub/LPRng</a> (UK)</td>
</tr>
<tr>
<td><a href="ftp://ftp.iona.com/pub/plp/LPRng"
target="_top">ftp://ftp.iona.com/pub/plp/LPRng</a>
(IE)</td>
</tr>
<tr>
<td><a href=
"ftp://uabgate.uab.ericsson.se/pub/unix/LPRng"
target=
"_top">ftp://uabgate.uab.ericsson.se/pub/unix/LPRng</a>
(SE)</td>
</tr>
</tbody>
</table>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN207">1.5. Mailing
List</a></h2>
<p>To join the <b class="APPLICATION">LPRng</b> mailing
list, please send mail to <a href=
"mailto: lprng-request@lprng.ie" target=
"_top">lprng-request@lprng.ie</a> with the only the word
<span class="emphasis"><i class=
"EMPHASIS">subscribe</i></span> in the body of the
message. <a name="FAQREF"></a></p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN214">1.6. PGP Public
Key</a></h2>
<p>The <b class="APPLICATION">LPRng</b> and <b class=
"APPLICATION">ifhp</b> distributions have MD5 checksum
files which are signed with a PGP public key. Here is the
key for validating the checksums:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN219"></a>
<pre class="SCREEN">
Type Bits/KeyID Date User ID
pub 1024/00D95C9D 1997/01/31 Patrick A. Powell <papowell@astart.com>
Patrick A. Powell <papowell@sdsu.edu>
-----BEGIN PGP PUBLIC KEY BLOCK-----
Version: 2.6.3i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=3Zbp
-----END PGP PUBLIC KEY BLOCK-----
</pre>
</div>
<br>
<br>
</div>
</div>
<div class="CHAPTER">
<hr>
<h1><a name="AEN221"></a>Chapter 2. Software Installation
and Configuration</h1>
<p>Before you do an installation please read the following
instructions. You will need to:</p>
<ol type="1">
<li>
<p>Use GNU Make. You can get it from <a href=
"http://www.gnu.org/software/software.html" target=
"_top">http://www.gnu.org/software/software.html</a>.
Don't even think about trying to use another make
unless you are a Wizard. And even the Wizards use GNU
Make.</p>
</li>
<li>
<p>Use an ANSI C compiler. <b class=
"APPLICATION">ifhp</b> is developed and tested with the
GNU C compiler. You can get it from <a href=
"http://www.gnu.org/software/software.html" target=
"_top">http://www.gnu.org/software/software.html</a>.
Solaris users should consult the excellent <a href=
"http://sunfreeware.com" target=
"_top">http://sunfreeware.com</a> site for binary
distributions. AIX users can use <a href=
"http://www.bull.de/pub/" target=
"_top">http://www.bull.de/pub/</a> or <a href=
"ftp://ftp.htwk-leipzig.de" target=
"_top">ftp://ftp.htwk-leipzig.de</a></p>
</li>
</ol>
<br>
<br>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN235">2.1. Additional
Recommended Software</a></h2>
<p>The following software is recommended for use with <b
class="APPLICATION">ifhp</b>. If your printer does not
support PostScript, PCL, or text printing directly you
will need to install GhostScript to convert from
PostScript to the printer format and use a suitable text
to PostScript converter.</p>
<div class="VARIABLELIST">
<dl>
<dt>Unix File Utility</dt>
<dd>
<p><a name="FILEUTIL"></a> The <b class=
"APPLICATION">ifhp</b> filter will recognize that a
file is PostScript, PJL, or PCL by examining the
first couple of bytes of a file and applying a
simple set of rules. If you require more elaborate
file type detection then you can configure <b
class="APPLICATION">ifhp</b> to also use the UNIX
<span class="emphasis"><i class=
"EMPHASIS">file</i></span> utility if it is unable
to determine the file type. See <a href=
"ftp://ftp.astron.com/pub/file/" target=
"_top">ftp://ftp.astron.com/pub/file/</a> or <a
href=
"ftp://ftp.lprng.com/pub/LPRng/UNIXTOOLS/file/"
target=
"_top">ftp://ftp.lprng.com/pub/LPRng/UNIXTOOLS/file/</a>
to obtain this software.</p>
</dd>
<dt><b class="APPLICATION">LPRng</b> Print
Spooler</dt>
<dd>
<p><a href="http://www.lprng.com" target=
"_top">http://www.lprng.com</a> The <b class=
"APPLICATION">ifhp</b> filter works best with the
later versions of this software, and the two are
developed as an integrated unit.</p>
</dd>
<dt>GhostScript</dt>
<dd>
<p><a name="GHOSTSCRIPT"></a> <a href=
"http://www.cs.wisc.edu/~ghost/index.html" target=
"_top">http://www.cs.wisc.edu/~ghost/index.html</a>
or <a href="http://www.ghostscript.com/" target=
"_top">http://www.ghostscript.com</a> If your
printer does not handle PostScript and you need to
print PostScript, GhostScript is used to convert
PostScript to a format usable by the printer.</p>
</dd>
<dt>a2ps - Ascii Text To PostScript Converter</dt>
<dd>
<p><a name="A2PS"></a> If your printer is a
PostScript only printer or you wish to have
enhanced formatting capability for documents, then
you will need a text to PostScript converter. <a
href="http://www-inf.enst.fr/~demaille/a2ps/"
target=
"_top">http://www-inf.enst.fr/~demaille/a2ps/</a>
This package does a very good job of text to
PostScript conversion. It also makes use of the <a
href="#FILEUTIL">file utility</a> to determine the
required conversions.</p>
</dd>
<dt>enscript - GNU Enscript</dt>
<dd>
<p><a name="ENSCRIPT"></a> <a href=
"http://www.gnu.org" target=
"_top">http://www.gnu.org/</a> This package is an
alternative to <var class="LITERAL">a2ps</var>, but
requires careful handling due to the exit codes it
produces. Please see <a href="#CONVERSION">Wrappers
For Programs</a> for details on how to use <var
class="LITERAL">enscript</var> with <b class=
"APPLICATION">ifhp</b>.</p>
</dd>
<dt>textps</dt>
<dd>
<p><a name="TEXTPS"></a> This program is included
with the <b class="APPLICATION">ifhp</b>
distribution and is an extremely primitive text to
PostScript filter. It generates PostScript
compatible with even the most ancient of PostScript
printers and is useful where <var class=
"LITERAL">a2ps</var> and <span class="emphasis"><i
class="EMPHASIS">enscript</i></span> are just too
modern. See <a href="http://www.lprng.com" target=
"_top">http://www.lprng.com</a>.</p>
</dd>
<dt>psutils</dt>
<dd>
<p><a name="PSUTILS"></a> The <var class=
"LITERAL">psutils</var> package developed by Angus
Duggan is available from <a href=
"ftp://ftp.dcs.ed.ac.uk/pub/ajcd/" target=
"_top">ftp://ftp.dcs.ed.ac.uk/pub/ajcd/</a>. These
are a collection of programs for manipulation of
PostScript files, and include facilities for doing
page selection, page reversal, n-up printing, and
watermarking.</p>
</dd>
<dt>netcat</dt>
<dd>
<p><a name="NETCAT"></a> The <var class=
"LITERAL">netcat</var> utility is extremely useful
when trying to send files to a network printer and
you need to monitor its activity. Developed by
<code class="EMAIL"><<a href=
"mailto:hobbit@avian.org">hobbit@avian.org</a>></code>,
it is available from <a href=
"ftp://avian.org/src/hacks/nc110.tgz" target=
"_top">ftp://avian.org/src/hacks/nc110.tgz</a>.</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN305">2.2.
Installation</a></h2>
<p>The installation procedure uses the <var class=
"LITERAL">configure</var> facility to generate Makefiles.
By convention, these files have the following variables
that install the <b class="APPLICATION">ifhp</b>
executables and configuration files in the following
locations:</p>
<div class="TABLE">
<a name="AEN310"></a>
<p><b>Table 2-1. Configure File Location
Variables</b></p>
<table border="1" class="CALSTABLE">
<col>
<col>
<col>
<col>
<thead>
<tr>
<th>Configure Variable</th>
<th>Default Value</th>
<th>Expanded Default Value</th>
<th>Override</th>
</tr>
</thead>
<tbody>
<tr>
<td><var class="LITERAL">${prefix}</var></td>
<td><var class="LITERAL">/usr/local</var></td>
<td><var class="LITERAL">--prefix=PATH</var></td>
<td> </td>
</tr>
<tr>
<td><var class=
"LITERAL">${exec_prefix}</var></td>
<td><var class="LITERAL">${prefix}</var></td>
<td><var class="LITERAL">/usr/local</var></td>
<td><var class=
"LITERAL">--execprefix=PATH</var></td>
</tr>
<tr>
<td><var class="LITERAL">${bindir}</var></td>
<td><var class=
"LITERAL">${exec_prefix}/bin</var></td>
<td><var class=
"LITERAL">/usr/local/bin</var></td>
<td><var class="LITERAL">--bindir=PATH</var></td>
</tr>
<tr>
<td><var class="LITERAL">${sbindir}</var></td>
<td><var class=
"LITERAL">${exec_prefix}/sbin</var></td>
<td><var class=
"LITERAL">/usr/local/sbin</var></td>
<td><var class=
"LITERAL">--sbindir=PATH</var></td>
</tr>
<tr>
<td><var class="LITERAL">${libexecdir}</var></td>
<td><var class=
"LITERAL">${exec_prefix}/libexec</var></td>
<td><var class=
"LITERAL">/usr/local/libexec</var></td>
<td><var class=
"LITERAL">--libexecdir=PATH</var></td>
</tr>
<tr>
<td><var class="LITERAL">${sysconfdir}</var></td>
<td><var class="LITERAL">${prefix}/etc</var></td>
<td><var class=
"LITERAL">/usr/local/etc</var></td>
<td><var class=
"LITERAL">--sysconfdir=PATH</var></td>
</tr>
<tr>
<td><var class="LITERAL">${mandir}</var></td>
<td><var class="LITERAL">${prefix}/man</var></td>
<td><var class=
"LITERAL">/usr/local/man</var></td>
<td><var class="LITERAL">--mandir=PATH</var></td>
</tr>
</tbody>
</table>
</div>
<p>The following files are installed as shown below:</p>
<div class="TABLE">
<a name="AEN382"></a>
<p><b>Table 2-2. Executable and Configuration File
Locations</b></p>
<table border="1" class="CALSTABLE">
<col>
<col>
<thead>
<tr>
<th>Configure Variable</th>
<th>Files</th>
</tr>
</thead>
<tbody>
<tr>
<td><var class=
"LITERAL">${libexecdir}/filters</var></td>
<td><var class="LITERAL">lpf, ifhp</var></td>
</tr>
<tr>
<td><var class="LITERAL">${sysconfdir}</var></td>
<td><var class="LITERAL">ifhp.conf</var></td>
</tr>
<tr>
<td><var class=
"LITERAL">${mandir}/man[1-9]</var></td>
<td><var class="LITERAL">man pages</var></td>
</tr>
</tbody>
</table>
</div>
<br>
<br>
<p>The configuration you choose should match that of the
<b class="APPLICATION">LPRng</b> print spooler. For
example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN407"></a>
<pre class="SCREEN">
./configure --prefix=/usr --sysconfdir=/etc \
--mandir=/usr/share/man
executables and files in
/usr/libexec/filters ifhp
/etc ifhp.conf
/usr/share/man/man[0-9] ifhp.man1
</pre>
</div>
<br>
<br>
<p>First, we untar, configure, compile, and install the
software:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN410"></a>
<pre class="SCREEN">
<samp class="PROMPT">h4: {1} %</samp> <kbd class=
"USERINPUT">gunzip -c ifhp-<version>.tgz | tar xvf -</kbd>
<samp class="PROMPT">h4: {2} %</samp> <kbd class=
"USERINPUT">cd ifhp-<version></kbd>
<samp class="PROMPT">h4: {3} %</samp> <kbd class=
"USERINPUT">./configure [ ... configuration options ]</kbd>
<samp class="PROMPT">h4: {4} %</samp> <kbd class=
"USERINPUT">make clean all</kbd>
<samp class="PROMPT">h4: {5} %</samp> <kbd class=
"USERINPUT">su # you must do the following commands as root</kbd>
<samp class="PROMPT">h4: {6} #</samp> <kbd class=
"USERINPUT">make install</kbd>
</pre>
</div>
<br>
<br>
<p>Modify your printcap file to use <b class=
"APPLICATION">ifhp</b>. Your printcap usually has the
following format; older version of <b class=
"APPLICATION">lpd</b> require <span class="emphasis"><i
class="EMPHASIS">:\</i></span> at the end of each line of
a printcap entry. The <span class="emphasis"><i class=
"EMPHASIS">:if</i></span> and <span class="emphasis"><i
class="EMPHASIS">:of</i></span> filter entries are
usually the ones of interest.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN430"></a>
<pre class="SCREEN">
lp:
:lp=xxxx:sd=xxxx:....
:if=/usr/local/path_to_old_filters/old_if_filter
:of=/usr/local/path_to_old_filters/old_of_filter
</pre>
</div>
<br>
<br>
<p>Your new printcap entry will look like the one below.
The <acronym class="ACRONYM">MODEL</acronym> information
is described in the next section.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN434"></a>
<pre class="SCREEN">
lp:
:lp=xxxx:sd=xxxx:....
# see text for details about the next line
:ifhp=model=MODEL,status@
:filter=/usr/local/libexec/filters/ifhp
# only if you are using accounting or banners
#:of=/usr/local/libexec/filters/ifhp
</pre>
</div>
<br>
<br>
<p>Select a suitable printer from the entries in the
configuration file (<tt class=
"FILENAME">/usr/local/etc/lpd.conf</tt> or <tt class=
"FILENAME">/etc/lpd.conf</tt>). These are described in
more detail in the next section.</p>
<p>Shut down and restart your print spooler and then send
a job to the printer. If this works and you do not need
any further capabilities of <b class=
"APPLICATION">ifhp</b> such as error reporting or printer
monitoring, then you are finished.</p>
<p>If you want to use additional capabilities, then you
should read the detailed instructions in the next couple
of sections.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="MODELSELECTION">2.3. Printer
Models Supported</a></h2>
<p>There are over 500 different printer models, types and
configurations supported by <b class=
"APPLICATION">ifhp</b>. If your printer is not currently
supported and you have documentation about the printer
then send mail to the <a href="#MAILLIST"><b class=
"APPLICATION">LPRng</b> Mailing List</a> and support will
be added.</p>
<p>The default printer is an HP LaserJet 4MP, which
supports PostScript Level 3, PCL5, PJL, and has
bidirectional communication and a functional
pagecounter.</p>
<p>The <tt class="FILENAME">ifhp.conf</tt> configuration
file contains configuration entries for various models of
printers. Each entry has a name usually corresponding to
the model of printer or its basic capabilities. For
example, the HP LaserJet 4 printer has the <var class=
"LITERAL">model=hp4</var> configuration entry. The <span
class="emphasis"><i class="EMPHASIS">default</i></span>
printer configuration covers a wide range of network
printers manufactured by Hewlett-Packard, Canon, Epson,
and others and is for a printer that has a bidirectional
communications connection that allows it to report status
information and the following capabilities:</p>
<ol type="1">
<li>
<p>PJL support (<var class="LITERAL">pjl</var>)
compatible with HP 4 family of printers</p>
</li>
<li>
<p>PostScript (PS) support (<var class=
"LITERAL">ps</var>).</p>
</li>
<li>
<p>PCL support (<var class="LITERAL">pcl</var>).</p>
</li>
<li>
<p>Text files printed as PCL (<var class=
"LITERAL">text</var>, <var class=
"LITERAL">default_language=pcl</var>).</p>
</li>
</ol>
<br>
<br>
<p>There is also support for <a href="#PSONLY">PostScript
only printers</a> (<var class="LITERAL">model=ps</var>),
<a href="#PHASER">Tektronics Phasers</a> (<var class=
"LITERAL">model=phaser</var>), <a href="#PHASER">QMS</a>
(<var class="LITERAL">model=qmsXXX</var>) and others. The
best way to determine the printers currently supported is
to examine the <tt class="FILENAME">ifhp.conf</tt> file.
The following is a sample of the various entries in the
configuration file.</p>
<div class="TABLE">
<a name="CONFIGENTRIES"></a>
<p><b>Table 2-3. <var class="LITERAL">ifhp.conf</var>
Configuration Entries</b></p>
<table border="1" frame="border" rules="all" class=
"CALSTABLE">
<col>
<col>
<thead>
<tr>
<th>Configuration</th>
<th>Printer Supported</th>
</tr>
</thead>
<tbody>
<tr>
<td><var class="LITERAL">default</var></td>
<td>Generic Printer based on HP 4M Plus,
PostScript, PJL, HPGL2, PCL, status, pagecount
support</td>
</tr>
<tr>
<td><var class="LITERAL">apple</var></td>
<td>Generic PostScript printer, text to PS
conversion, status, pagecount support</td>
</tr>
<tr>
<td><var class="LITERAL">postscript</var></td>
<td>Generic PostScript printer, text to PS
conversion, status, pagecount support</td>
</tr>
<tr>
<td><var class="LITERAL">ps</var></td>
<td>Generic PostScript printer, text to PS
conversion, status, pagecount support</td>
</tr>
<tr>
<td><var class="LITERAL">pcl</var></td>
<td>Generic PCL only printer, no status</td>
</tr>
<tr>
<td><var class="LITERAL">pcl_gs</var></td>
<td>HP LaserJet 4 PCL only printer, write only,
no status</td>
</tr>
<tr>
<td><var class="LITERAL">hpiiisi</var></td>
<td>HP LaserJet III (PCL and PostScript
Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp3si</var></td>
<td>HP LaserJet III (PCL and PostScript
Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">ljet3</var></td>
<td>HP LaserJet III (PCL and PostScript
Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">lj3</var></td>
<td>HP LaserJet III (PCL and PostScript
Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hpiiisi.gs</var></td>
<td>HP LaserJet III (PCL, PostScript via
GhostScript)</td>
</tr>
<tr>
<td><var class="LITERAL">hp3si.gs</var></td>
<td>HP LaserJet III (PCL, PostScript via
GhostScript)</td>
</tr>
<tr>
<td><var class="LITERAL">ljet3.gs</var></td>
<td>HP LaserJet III (PCL, PostScript via
GhostScript)</td>
</tr>
<tr>
<td><var class="LITERAL">lj3.gs</var></td>
<td>HP LaserJet III (PCL, PostScript via
GhostScript)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4m</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4m
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4si</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4si
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4simx</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4simx
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4plus</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4plus
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4mplus</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4mplus
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4v</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4v
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4mv</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4mv
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4p</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4p
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4mp</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4mp
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4pj</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4pj
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hpljpro</var></td>
<td>HP LaserJet 4 Family, HP LaserJet ljpro
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4lc</var></td>
<td>HP LaserJet 4 Family, HP LaserJet 4lc
(PostScript Interpreter)</td>
</tr>
<tr>
<td><var class="LITERAL">hp4mplus</var></td>
<td>HP LaserJet 4MPlus</td>
</tr>
<tr>
<td><var class="LITERAL">hp5l</var></td>
<td>HP LaserJet 5 Family, Hp LaserJet 5l</td>
</tr>
<tr>
<td><var class="LITERAL">hp6l</var></td>
<td>HP LaserJet 6 Family, Hp LaserJet 6l</td>
</tr>
<tr>
<td><var class="LITERAL">hp1100</var></td>
<td>HP LaserJet 6 Family, Hp LaserJet 1100</td>
</tr>
<tr>
<td><var class="LITERAL">hp1100</var></td>
<td>HP LaserJet 1000 Family, Hp LaserJet
1100</td>
</tr>
<tr>
<td><var class="LITERAL">hp4l</var></td>
<td>Hp LaserJet 4L, PCL only</td>
</tr>
<tr>
<td><var class="LITERAL">hp4ml</var></td>
<td>HP LaserJet 4ml</td>
</tr>
<tr>
<td><var class="LITERAL">hp5p</var></td>
<td>HP LaserJet 5p</td>
</tr>
<tr>
<td><var class="LITERAL">hp5mp</var></td>
<td>HP LaserJet 5mp</td>
</tr>
<tr>
<td><var class="LITERAL">hp6p</var></td>
<td>HP LaserJet 6p</td>
</tr>
<tr>
<td><var class="LITERAL">hp6mp</var></td>
<td>HP LaserJet 6mp</td>
</tr>
<tr>
<td><var class="LITERAL">hp5</var></td>
<td>HP LaserJet 5</td>
</tr>
<tr>
<td><var class="LITERAL">hp5si</var></td>
<td>HP LaserJet 5si</td>
</tr>
<tr>
<td><var class="LITERAL">hp5simx</var></td>
<td>HP LaserJet 5simx</td>
</tr>
<tr>
<td><var class="LITERAL">hp5m</var></td>
<td>HP LaserJet 5m</td>
</tr>
<tr>
<td><var class="LITERAL">hp4100</var></td>
<td>HP LaserJet 4100</td>
</tr>
<tr>
<td><var class="LITERAL">hp4200</var></td>
<td>HP LaserJet 4200</td>
</tr>
<tr>
<td><var class="LITERAL">hp4300</var></td>
<td>HP LaserJet 4300</td>
</tr>
<tr>
<td><var class="LITERAL">hp5simopier</var></td>
<td>HP LaserJet 5simopier</td>
</tr>
<tr>
<td><var class="LITERAL">hp4000</var></td>
<td>HP LaserJet 4000</td>
</tr>
<tr>
<td><var class="LITERAL">hpcolorlj</var></td>
<td>HP Color LaserJet</td>
</tr>
<tr>
<td><var class="LITERAL">hpcolorlj5</var></td>
<td>HP Color LaserJet 5</td>
</tr>
<tr>
<td><var class="LITERAL">hpcolorlj5m</var></td>
<td>HP Color LaserJet 5m</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj1200</var></td>
<td>HP DesignJet 1200 Family</td>
</tr>
<tr>
<td><var class="LITERAL">hppjxl300</var></td>
<td>HP PaintJet XL 300 Family</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj1600</var></td>
<td>HP DesignJet 1600 Family</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj200</var></td>
<td>HP DeskJet 200</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj220</var></td>
<td>HP DeskJet 220</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj600</var></td>
<td>HP DeskJet 600</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj650</var></td>
<td>HP DeskJet 650</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj230</var></td>
<td>HP DeskJet 230</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj250c</var></td>
<td>HP DeskJet 250c</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj330</var></td>
<td>HP DeskJet 330</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj350c</var></td>
<td>HP DeskJet 350c</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj430</var></td>
<td>HP DeskJet 430</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj450c</var></td>
<td>HP DeskJet 450c</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj455ca</var></td>
<td>HP DeskJet 455ca</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj700</var></td>
<td>HP DeskJet 700</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj750c</var></td>
<td>HP DeskJet 750c</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj750cplus</var></td>
<td>HP DeskJet 750cplus</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj755cm</var></td>
<td>HP DeskJet 755cm</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj2000cp</var></td>
<td>HP DeskJet 2000cp</td>
</tr>
<tr>
<td><var class="LITERAL">hp2500</var></td>
<td>HP DesignJet 2500 - No PCL, PostScript
Only</td>
</tr>
<tr>
<td><var class="LITERAL">hp2500cm</var></td>
<td>HP DesignJet 2500cm - No PCL, PostScript
Only</td>
</tr>
<tr>
<td><var class="LITERAL">hp2500c</var></td>
<td>HP DesignJet 2500c - No PCL, PostScript
Only</td>
</tr>
<tr>
<td><var class="LITERAL">hp2500cm</var></td>
<td>HP DesignJet 2500cm - PCL and PostScript</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj2500cp</var></td>
<td>HP DesignJet 2500CP, not HP2500, HP2500c,
HP2500cm</td>
</tr>
<tr>
<td><var class="LITERAL">hp4500</var></td>
<td>HP Color LaserJet Printer 4500</td>
</tr>
<tr>
<td><var class="LITERAL">hp8500</var></td>
<td>HP Color LaserJet Printer 8500</td>
</tr>
<tr>
<td><var class="LITERAL">hp8550</var></td>
<td>HP Color LaserJet Printer 8550</td>
</tr>
<tr>
<td><var class="LITERAL">hp4550n</var></td>
<td>HP 4550N</td>
</tr>
<tr>
<td><var class="LITERAL">hp5000</var></td>
<td>HP 5000 Model C4111A (LaserJet 5000)</td>
</tr>
<tr>
<td><var class="LITERAL">hp8000</var></td>
<td>HP LaserJet 8000 Series, HP8000</td>
</tr>
<tr>
<td><var class="LITERAL">hp8100</var></td>
<td>HP LaserJet 8000 Series, HP8100</td>
</tr>
<tr>
<td><var class="LITERAL">hp8150</var></td>
<td>HP LaserJet 8000 Series, HP8150</td>
</tr>
<tr>
<td><var class="LITERAL">hp2100</var></td>
<td>HP LaserJet 2100 Series</td>
</tr>
<tr>
<td><var class="LITERAL">hp2200</var></td>
<td>HP LaserJet 2200 Series</td>
</tr>
<tr>
<td><var class="LITERAL">hp4050</var></td>
<td>HP 4050 Series Printers</td>
</tr>
<tr>
<td><var class="LITERAL">qms1725</var></td>
<td>QMS 1725, uses appsocket, no status,
PostScript only</td>
</tr>
<tr>
<td><var class="LITERAL">qms2025</var></td>
<td>QMS Laser Printer QMS 2025, appsocket, no
status, PostScript and PCL</td>
</tr>
<tr>
<td><var class="LITERAL">qms860</var></td>
<td>QMS Laser Printer QMS 860, appsocket, no
status, PostScript and PCL</td>
</tr>
<tr>
<td><var class="LITERAL">qms2060</var></td>
<td>QMS Laser Printer QMS 2060, appsocket, no
status, PostScript and PCL</td>
</tr>
<tr>
<td><var class="LITERAL">phaser</var></td>
<td>Tektronics Generic Phaser Color Printer,
appsocket, snmp monitoring, PostScript only</td>
</tr>
<tr>
<td><var class="LITERAL">phaser360</var></td>
<td>Tektronics Phaser 360 Color Printer,
appsocket, snmp monitoring, PostScript only</td>
</tr>
<tr>
<td><var class="LITERAL">phaser740</var></td>
<td>Tektronics Phaser 740 Color Printer,
appsocket, snmp monitoring, PostScript only</td>
</tr>
<tr>
<td><var class="LITERAL">phaser750</var></td>
<td>Tektronics Phaser 750 Color Printer,
appsocket, snmp monitoring, PostScript only</td>
</tr>
<tr>
<td><var class="LITERAL">phaser850</var></td>
<td>Tektronics Phaser 850 Color Printer,
appsocket, snmp monitoring, PostScript only</td>
</tr>
<tr>
<td><var class="LITERAL">phaser740</var></td>
<td>Tektronics Phaser 740 Color Printer,
appsocket, snmp monitoring, PostScript and
PCL</td>
</tr>
<tr>
<td><var class="LITERAL">phaser5400</var></td>
<td>Tektronics Phaser 5400 Color Printer,
appsocket, snmp monitoring, PostScript and
PCL</td>
</tr>
<tr>
<td><var class="LITERAL">phaser7700</var></td>
<td>Tektronics Phaser 7700 Color Printer,
appsocket, snmp monitoring, PostScript and
PCL</td>
</tr>
<tr>
<td><var class="LITERAL">lexmark4039</var></td>
<td>Lexmark 4039, Postscript only</td>
</tr>
<tr>
<td><var class=
"LITERAL">lexmark_optra_e312</var></td>
<td>Lexmark Optra e312, Postscript, PCL and
PJL</td>
</tr>
<tr>
<td><var class="LITERAL">ln15s</var></td>
<td>Digital Laser LN15, LN17ps, Compaq Laser LN
16</td>
</tr>
<tr>
<td><var class="LITERAL">ln16s</var></td>
<td>Digital Laser LN15, LN17ps, Compaq Laser LN
16</td>
</tr>
<tr>
<td><var class="LITERAL">ln17pss</var></td>
<td>Digital Laser LN15, LN17ps, Compaq Laser LN
16</td>
</tr>
<tr>
<td><var class="LITERAL">hpij2250s</var></td>
<td>HP Business Inkjet 2250</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bj10</var></td>
<td>Canon BubbleJet BJ10e</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bj10</var></td>
<td>Canon BubbleJet BJ20</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bj200</var></td>
<td>Canon BubbleJet BJ200</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bj200</var></td>
<td>Canon BubbleJet BJC-210 B/W only</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bj200</var></td>
<td>Canon BubbleJet BJC-240 B/W only</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bj200</var></td>
<td>Canon BubbleJet BJC-250 B/W only</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bj200</var></td>
<td>Canon BubbleJet BJC-70 B/W only</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-600</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-610</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-50</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-70</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-80</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-210 Color only</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-240 Color only</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-250</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-1000</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-2000</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-4000</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-4100 B/W only</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-4200</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-4300</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-4550</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon BubbleJet BJC-6000</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc600</var></td>
<td>Canon MultiPASS C2500 color
printer/fax/copier</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc800</var></td>
<td>Canon BubbleJet BJC-800</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc800</var></td>
<td>Canon BubbleJet BJC-7000 Color.</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc800</var></td>
<td>Canon BubbleJet BJC-4300 Color</td>
</tr>
<tr>
<td><var class="LITERAL">gs_bjc800</var></td>
<td>Canon BubbleJet BJC-4650</td>
</tr>
<tr>
<td><var class="LITERAL">gs_deskjet</var></td>
<td>HP DeskJet</td>
</tr>
<tr>
<td><var class="LITERAL">gs_deskjet</var></td>
<td>HP DeskJet Plus</td>
</tr>
<tr>
<td><var class="LITERAL">gs_djet500</var></td>
<td>HP DeskJet 500 B/W</td>
</tr>
<tr>
<td><var class="LITERAL">gs_djet500</var></td>
<td>HP DeskJet Portable B/W</td>
</tr>
<tr>
<td><var class="LITERAL">gs_djet500</var></td>
<td>HP OfficeJet 590 B/W</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj500</var></td>
<td>HP DeskJet 400</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj500</var></td>
<td>HP DeskJet 500C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj500</var></td>
<td>HP DeskJet 540C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj500</var></td>
<td>HP DeskJet 690C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj500</var></td>
<td>HP DeskJet 693C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 550C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 560C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 600</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 660C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 660C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 682C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 683C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 693C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 694C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 690C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 692C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 693C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 694C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 695C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 850</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 870Cse</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 895Cxi</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP DeskJet 970</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>HP OfficeJet 590</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>Olivetti jp450</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj550</var></td>
<td>Xerox XJ6C, PCL and Postscript using
GhostScript</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj850</var></td>
<td>HP DeskJet 850</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj850</var></td>
<td>HP DeskJet 855</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj850</var></td>
<td>HP DeskJet 870Cse</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj850</var></td>
<td>HP DeskJet 870Cxi</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj850</var></td>
<td>HP DeskJet 890C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj850</var></td>
<td>HP DeskJet 670C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdj850</var></td>
<td>HP DeskJet 680</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdeskjet</var></td>
<td>HP DeskJet 500C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdjmono</var></td>
<td>HP DeskJet 500C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdjmono</var></td>
<td>HP DeskJet 510</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdjmono</var></td>
<td>HP DeskJet 520</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdjmono</var></td>
<td>HP DeskJet 540C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_cdjmono</var></td>
<td>HP DeskJet 693C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_epsonc</var></td>
<td>Fujitsu DL-1100</td>
</tr>
<tr>
<td><var class="LITERAL">gs_epsonc</var></td>
<td>Fujitsu DL-2400</td>
</tr>
<tr>
<td><var class="LITERAL">gs_hl7x0</var></td>
<td>Brother HL-720</td>
</tr>
<tr>
<td><var class="LITERAL">gs_hl7x0</var></td>
<td>Brother HL-730</td>
</tr>
<tr>
<td><var class="LITERAL">gs_laserjet</var></td>
<td>Bull Compuprint Pagemaster 415</td>
</tr>
<tr>
<td><var class="LITERAL">gs_lips3</var></td>
<td>Canon LBP4+</td>
</tr>
<tr>
<td><var class="LITERAL">gs_lj4dith</var></td>
<td>HP DeskJet 600</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet2</var></td>
<td>HP LaserJet II</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet2</var></td>
<td>Xerox 4030 - PCL, PostScript support using
GhostScript</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet3</var></td>
<td>Tandy LP800 With LaserJet III emulation.</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>Brother HL-660</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>Brother HL-760 600dpi</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>Epson EPL5700 300dpi OK</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>HP DeskJet 600 margins wrong</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>HP DeskJet 870Cse</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>HP LaserJet 5 300dpi or 600dpi</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>HP LaserJet 5L 300dpi or 600dpi</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>HP LaserJet 6L 600dpi</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>HP LaserJet 1100 600dpi OK.</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>IBM Network Printer 17</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>IBM/Lexmark 4029 Margins wrong.</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>Lexmark Optra E+</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>Lexmark Optra SC 1275 B/W only.</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljet4</var></td>
<td>Oki OL410ex LED printer 300dpi or 600dpi</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljetplus</var></td>
<td>HP LaserJet Plus</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljetplus</var></td>
<td>Canon Laser LBP-600</td>
</tr>
<tr>
<td><var class="LITERAL">gs_ljetplus</var></td>
<td>NEC SuperScript 860</td>
</tr>
<tr>
<td><var class="LITERAL">gs_pjxl300</var></td>
<td>HP PaintJet XL300</td>
</tr>
<tr>
<td><var class="LITERAL">gs_pjxl300</var></td>
<td>HP DeskJet 600</td>
</tr>
<tr>
<td><var class="LITERAL">gs_pjxl300</var></td>
<td>HP DeskJet 1200C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_pjxl300</var></td>
<td>HP DeskJet 1600C</td>
</tr>
<tr>
<td><var class="LITERAL">gs_r4081</var></td>
<td>Ricoh 4081 laser printer</td>
</tr>
<tr>
<td><var class="LITERAL">gs_r4081</var></td>
<td>Ricoh 6000 laser printer</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610a0.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
360x360dpi plain paper, high speed</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610a1.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
360x360dpi plain paper</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610a2.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
360x360dpi coated paper</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610a3.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
360x360dpi transparency film</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610a4.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
360x360dpi back print film</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610a5.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
360x360dpi fabric sheet</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610a6.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
360x360dpi glossy paper</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610a7.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
360x360dpi high gloss film</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610a8.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
360x360dpi high resolution paper</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610b1.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
720x720dpi plain paper</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610b2.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
720x720dpi coated paper</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610b3.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
720x720dpi transparency film</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610b4.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
720x720dpi back print film</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610b6.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
720x720dpi glossy paper</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610b7.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
720x720dpi high-gloss paper</td>
</tr>
<tr>
<td><var class="LITERAL">bjc610b8.upp</var></td>
<td>Canon BubbleJet BJC-610 (color, rendered)
720x720dpi high resolution paper</td>
</tr>
<tr>
<td><var class="LITERAL">cdj550.upp</var></td>
<td>HP DeskJet 550C 300x300dpi 32-bit CMYK</td>
</tr>
<tr>
<td><var class="LITERAL">necp2x.upp</var></td>
<td>NEC P2X 360x360dpi 8-bit
(Floyd-Steinberg)</td>
</tr>
<tr>
<td><var class="LITERAL">stcany.upp</var></td>
<td>Epson Stylus Color (Any) 360x360dpi 4-bit,
PostScript halftoning</td>
</tr>
<tr>
<td><var class="LITERAL">stc.upp</var></td>
<td>Epson Stylus (Original) and Stylus Pro Color
360x360dpi 32-bit CMYK, 15-pin</td>
</tr>
<tr>
<td><var class="LITERAL">stc_l.upp</var></td>
<td>Epson Stylus (Original) and Stylus Pro Color
360x360dpi 4-bit, PostScript halftoning, weaved
noWeave</td>
</tr>
<tr>
<td><var class="LITERAL">stc_h.upp</var></td>
<td>Epson Stylus (Original) and Stylus Pro Color
720x720dpi 32-bit CMYK, 15-pin Weave</td>
</tr>
<tr>
<td><var class="LITERAL">stc2.upp</var></td>
<td>Epson Stylus (Original) and Stylus Pro Color
360x360dpi 32-bit CMYK, 20-pin, Epson Stylus
Color II(s)</td>
</tr>
<tr>
<td><var class="LITERAL">stc2_h.upp</var></td>
<td>Epson Stylus (Original) and Stylus Pro Color
720x720dpi 32-bit CMYK, 20-pin, Epson Stylus
Color II</td>
</tr>
<tr>
<td><var class="LITERAL">stc2s_h.upp</var></td>
<td>Epson Stylus (Original) and Stylus Pro Color
720x720dpi 32-bit CMYK, 20-pin, Epson Stylus
Color IIs</td>
</tr>
<tr>
<td><var class="LITERAL">stc500p.upp</var></td>
<td>Epson Stylus Color 500 360x360dpi 32-bit
CMYK, noWeave, plain paper</td>
</tr>
<tr>
<td><var class="LITERAL">stc500ph.upp</var></td>
<td>Epson Stylus Color 500 720x720dpi 32-bit
CMYK, noWeave, plain paper</td>
</tr>
<tr>
<td><var class="LITERAL">stc600pl.upp</var></td>
<td>Epson Stylus Color 600, 360x360dpi,
32/90-inch weaving 32-bit CMYK, 32-pin, plain
paper</td>
</tr>
<tr>
<td><var class="LITERAL">stc600p.upp</var></td>
<td>Epson Stylus Color 600, 720x720dpi,
32/90-inch weaving 32-bit CMYK, 32-pin, plain
paper</td>
</tr>
<tr>
<td><var class="LITERAL">stc600ih.upp</var></td>
<td>Epson Stylus Color 600, 1440x720dpi,
32/90-inch weaving 32-bit CMYK, 30-pin, inkjet
paper</td>
</tr>
<tr>
<td><var class="LITERAL">stc800pl.upp</var></td>
<td>Epson Stylus Color 800, 64/180-inch weaving
360x360dpi 32-bit CMYK, 64-pin, plain paper</td>
</tr>
<tr>
<td><var class="LITERAL">stc800p.upp</var></td>
<td>Epson Stylus Color 800, 64/180-inch weaving
720x720dpi 32-bit CMYK, 64-pin, plain paper</td>
</tr>
<tr>
<td><var class="LITERAL">stc800ih.upp</var></td>
<td>Epson Stylus Color 800, 64/180-inch weaving
1440x720dpi 32-bit CMYK, 62-pin, inkjet
paper</td>
</tr>
<tr>
<td><var class="LITERAL">stc1520h.upp</var></td>
<td>Epson Stylus Color 800, 64/180-inch weaving
1440x720dpi 32-bit CMYK, 62-pin, inkjet
paper</td>
</tr>
<tr>
<td><var class=
"LITERAL">imagerunner550</var></td>
<td>Canon imageRUNNER 550/600 iR600-550-60</td>
</tr>
<tr>
<td><var class=
"LITERAL">imagerunner600</var></td>
<td>Canon imageRUNNER 550/600 iR600-550-60</td>
</tr>
<tr>
<td><var class="LITERAL">hpdj800ps</var></td>
<td>HP DesignJet 800ps</td>
</tr>
<tr>
<td><var class="LITERAL">panther</var></td>
<td>Sharp Generic Panther Family, PS and PCL,
uses SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-160</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-161</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-162</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-162s</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-163</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-164</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-200</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-200s</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-201</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-205</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-206</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-207</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-f201</var></td>
<td>Sharp %, Panther Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">cougar</var></td>
<td>Sharp Generic Cougar Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-335</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-336</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-337</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-s337</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-405</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-407</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-505</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-s505</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-507</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-s507</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-250</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-280</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-281</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-285</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-286</var></td>
<td>Sharp %, Cougar Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">leopard</var></td>
<td>Sharp Generic Leopard Family, PS and PCL,
uses SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-235</var></td>
<td>Sharp %s, Leopard Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-275</var></td>
<td>Sharp %s, Leopard Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-n275</var></td>
<td>Sharp %s, Leopard Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-m208</var></td>
<td>Sharp %s, Leopard Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">tiger</var></td>
<td>Sharp Generic Tiger Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-p350</var></td>
<td>Sharp %, Tiger Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-m350</var></td>
<td>Sharp %, Tiger Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-m350u</var></td>
<td>Sharp %, Tiger Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-m350n</var></td>
<td>Sharp %, Tiger Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-p450</var></td>
<td>Sharp %, Tiger Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-m450</var></td>
<td>Sharp %, Tiger Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-m450u</var></td>
<td>Sharp %, Tiger Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-m450n</var></td>
<td>Sharp %, Tiger Family, PS and PCL, uses SNMP
for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">toshiba650</var></td>
<td>Sharp Generic Toshiba650 Family, PS and PCL,
uses SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-650</var></td>
<td>Sharp %, Toshiba650 Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-800</var></td>
<td>Sharp %, Toshiba650 Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">fiery651</var></td>
<td>Sharp Generic Fiery651 Family, PS and PCL,
uses SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-651</var></td>
<td>Sharp %, Fiery651 Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
<tr>
<td><var class="LITERAL">ar-810</var></td>
<td>Sharp %, Fiery651 Family, PS and PCL, uses
SNMP for status and pagecount</td>
</tr>
</tbody>
</table>
</div>
<br>
<br>
<p>If your printer is not in this this list then you can
use the following guidelines. If you have a PostScript
only printer you should use the <var class=
"LITERAL">ps</var> model. If you have a PCL only printer,
then <var class="LITERAL">pcl</var> is recommended. If
you want to process PostScript files on your PCL only
printer then install GhostScript and use <var class=
"SYMBOL">pcl_ps</var> entry and select the GhostScript
driver suitable for your printer.</p>
<p>The other model entries are used when specific printer
functionality or features are needed. For example, if you
want to do accounting or use <span class="emphasis"><i
class="EMPHASIS">landscape</i></span> mode, then you
should check for your specific printer model in the
configuration file.</p>
</div>
</div>
<div class="CHAPTER">
<hr>
<h1><a name="AEN1670"></a>Chapter 3. Recommended -Z options
for Users</h1>
<p>Due to the general nature of the <b class=
"APPLICATION">ifhp</b> filter, there is no standard set of
<var class="OPTION">-Z</var> user options because there is
no standard set of user facilities. However, the following
are recommended for use by implementors of new
configurations or printer support.</p>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN1675">3.1. Input Tray
Selection</a></h2>
<p>If a printer supports an input tray selection
mechanism, then the following options are recommended for
use. Local conditions or printer type may require
addition options.</p>
<div class="VARIABLELIST">
<dl>
<dt><var class="LITERAL">inupper, inlower, intray1,
intray2, ..., manual, envelope</var></dt>
<dd>
<p>The input tray selection options should start
with the <var class="LITERAL">in</var> prefix and
correspond to the various trays, if possible. The
<var class="LITERAL">manual</var> and <var class=
"LITERAL">envelope</var> options are included to
select manual feed or envelope feed. There is a
possible source of conflict here as there may be an
envelope feeder as well as an envelope media. This
is a printer specific dependency.</p>
</dd>
<dt><var class="LITERAL">source=name</var></dt>
<dd>
<p>The <var class="LITERAL">key=value</var> form
allows users to use options such as <var class=
"LITERAL">-Zsource=inbin1</var>, which may be
useful for systems that have an unusual or
nonstandard input selection mechanism.</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN1694">3.2. Output Bin
Selection</a></h2>
<p>If a printer has an output bin selection mechanism or
some other finishing mechanism, then the following are
recommended for use.</p>
<div class="VARIABLELIST">
<dl>
<dt><var class="LITERAL">outupper, outlower, outbin1,
...</var></dt>
<dd>
<p>The output bin selection should start with the
<var class="LITERAL">out</var> prefix.</p>
</dd>
<dt><var class="LITERAL">outbin=name</var></dt>
<dd>
<p>The <var class="LITERAL">outbin=name</var> form
allow users to use options such as <var class=
"LITERAL">-Zoutbin=stapler</var>, which may be
useful for systems that have an unusual or
nonstandard output selection mechanism.</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN1712">3.3. Media Size
(Paper) Selection</a></h2>
<p>The paper size selection facilities usually are quite
printer dependent, and the input tray selection and paper
size selection mechanisms may interact in strange and
mysterious ways.</p>
<div class="VARIABLELIST">
<dl>
<dt><var class="LITERAL">letter, legal, ledger,
oversize, a0, a1, ...</var></dt>
<dd>
<p>These are standard paper size names.</p>
</dd>
<dt><var class="LITERAL">11x17, tabloid</var></dt>
<dd>
<p>These are usually aliases for ledger, but
depending on local conditions can select different
types of paper.</p>
</dd>
<dt><var class="LITERAL">paper=name</var></dt>
<dd>
<p>The <var class="LITERAL">paper=name</var> form
allow users to use options such as <var class=
"LITERAL">-Zpaper=b3</var>, which may be useful for
systems that have an unusual or nonstandard input
media selection mechanism.</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN1734">3.4. Media Type
Selection</a></h2>
<p>Media Type is not the same as paper size, and
corresponds to the name assigned to a particular media.
Of course, the issue is complicated by the fact that some
media have standard sizes as well. Again, the input tray
selection, media size, and media type selection will
interact in confusing and mysterious ways, depending on
the whim of the printer firmware implementors.</p>
<p>You will also notice that there is no general <var
class="LITERAL">mediatype=name</var> selection mechanism.
This is due to the extremely different way that the media
names must be passed for PostScript, PJL, and PCL.</p>
<div class="VARIABLELIST">
<dl>
<dt><var class="LITERAL">plain, preprinted,
letterhead, transparency, glossy, prepunched,
labels</var></dt>
<dd>
<p>These are commonly used media type names gleaned
from various PostScript Printer Description Files,
Microsoft printer drivers, and arcane lore of the
Printer Working Group. Note that these are not
accepted terms in the paper industry for any of
these type of media. You are warned.</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN1746">3.5. Duplex and
Simplex</a></h2>
<p>Duplex printing is when impressions are placed on both
sides of a sheet of media. Due to a general lack of
conventions, the orientation of each of the impressions
varies from vendor to vendor, and has changed over the
years.</p>
<div class="VARIABLELIST">
<dl>
<dt><var class="LITERAL">duplex, lduplex</var></dt>
<dd>
<p>Print on both sides using the default
orientation. The <var class="LITERAL">lduplex</var>
is an alias for <var class=
"LITERAL">duplex</var></p>
</dd>
<dt><var class="LITERAL">duplexshort,
sduplex</var></dt>
<dd>
<p>Print on both sides but reverse the orientation
of one page. The <var class="LITERAL">sduplex</var>
is an alias for <var class=
"LITERAL">duplexshort</var> Which page is reversed
is at the whim of the firmware implementors and
conventions for the printer.</p>
</dd>
<dt><var class="LITERAL">simplex</var></dt>
<dd>
<p>Print on a single side of a page</p>
</dd>
<dt><var class="LITERAL">tumble, shortedge</var></dt>
<dd>
<p>This is use to print a single page on one side
of the media, but using the (nonstandard)
orientation for the <var class=
"LITERAL">duplexshort</var>. This is usually done
when a single impression must be generated on the
alternative side of the media, rather than the
default side. Again, this is dependent on the whims
and whimsies of the printer firmware implementors,
and may have some unexpected side effects.</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN1776">3.6. Copies</a></h2>
<p>This option has been provided to effectively allow the
printer to make multiple copies of a single page or job.
This option tends to be misimplemented on almost all
known printers, and it is strongly recommended that users
do not use it. However, for completeness, compatibility,
and implementor consideration, this is included, even
against the better judgement of the implementors of the
<b class="APPLICATION">ifhp</b> software.</p>
<div class="VARIABLELIST">
<dl>
<dt><var class="LITERAL">copies=nnn</var></dt>
<dd>
<p>Attempt to make <var class="LITERAL">nnn</var>
copies of each impression. This usually fails with
catastrophic problems unless you have a system that
supports all of the various options required, has
enough memory to handle rasterization, you do not
have a paper outage, and the printer does not stop
with operator intervention. You have been
warned.</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
</div>
<div class="CHAPTER">
<hr>
<h1><a name="AEN1787"></a>Chapter 4. Printer Capabilities,
Configurations, and Printcaps</h1>
<p>One of the major difficulties with printer software is
dealing with the wide range of different printer hardware
configurations and printer connections. This section
outlines the printer communication methods, the types of
print job languages, and the effects of these on printing
software and the <b class="APPLICATION">ifhp</b>
filter.</p>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN1791">4.1. Printer
Configurations</a></h2>
<p>A printer consists of a hardware print engine which
marks the output page and delivers it, a set of control
hardware that takes a <span class="emphasis"><i class=
"EMPHASIS">print job</i></span> in a well defined format
and operates the hardware to produce output according to
information in the <span class="emphasis"><i class=
"EMPHASIS">print job</i></span>, and a communication
channel from the computer to the control hardware. The
control hardware is sometimes called a <span class=
"emphasis"><i class="EMPHASIS">print engine</i></span>.
In most modern computers the control hardware may consist
of multiple microprocessors, each with their own
firmware, and each performing a specific printing task.
For example, one may control the paper feed path, one may
do rasterization, and one may handle communications with
the outside world.</p>
<p>In order to set up printing correctly, it is necessary
to know the following information about your printer.</p>
<ol type="1">
<li>
<p>The capabilities of the hardware. This is
dependent on the model of printer, and may be such
things as the page feed, output and input tray
selection, numbers of columns and/or rows of output
available on the output device. This information is
readily available from most manufacturers.</p>
</li>
<li>
<p>The <span class="emphasis"><i class=
"EMPHASIS">print job language</i></span> recognized
by the control hardware. This is the special set of
codes, commands, and formats recognized by the
control hardware.</p>
</li>
<li>
<p>The protocol used to send jobs to the printer and
obtain status about the printing activity.</p>
</li>
</ol>
<br>
<br>
<p>Usually the capabilities of a modern printer are very
well known and documented, and the <b class=
"APPLICATION">ifhp</b> filter and most print spooling
software has little difficulty working with them.</p>
<p>The following checklist will help you in setting up
your printer. The various options that you will need to
know about are indicated where appropriate.</p>
<ol type="1">
<li>
<p>Printer Model (<var class=
"LITERAL">model=???</var>) What is the exact printer
model? Check the serial number or other
identification to get this information. You should
check the <tt class="FILENAME">ifhp.conf</tt>
configuration file to see if your printer is already
supported.</p>
</li>
<li>
<p>Print Languages Supported By Your Printer</p>
<ol type="a">
<li>
<p>PJL? (<var class="LITERAL">pjl</var> or <var
class="LITERAL">pjl@</var>) The Printer Job
Language (PJL) is a high level language supported
by many Hewlett-Packard printers that allows some
print system configuration to be performed. Due
to historical developments, not all printers
support all PJL language facilities, and some
support them in different ways than other
printers. The <b class="APPLICATION">ifhp</b>
filter can use the PJL support for a printer if
it is available.</p>
</li>
<li>
<p>PostScript (and what version)? (<var class=
"LITERAL">ps</var> or <var class=
"LITERAL">ps@</var>) PostScript is the most
common print job language in use. If your printer
supports PostScript, then you will have a
relatively trouble free time with it. One problem
is that it requires a fairly substantial amount
of memory and computational support, and is
usually not found on the low end (less than $500)
printers.</p>
</li>
<li>
<p>PCL? (<var class="LITERAL">pcl</var> or <var
class="LITERAL">pcl@</var>) PCL is another Print
Language supported by many vendors, including
Hewlett-Packard, Lexmark, and others. It is
essentially text with escape sequences to tell
the print engine to place markings on a page at
specific places in a specific font. It is the
second most common format used with modern
printers.</p>
</li>
<li>
<p>Text? (<var class="LITERAL">text</var> or <var
class="LITERAL">text@</var>) Text is really just
PCL without any control sequences. However, it is
easy to have <b class="APPLICATION">ifhp</b>
convert ordinary text into PCL by prefixing the
appropriate PCL control codes. You may also need
to use the <var class="LITERAL">crlf</var> option
to force <acronym class="ACRONYM">CR</acronym> to
<var class="LITERAL">CR-LF</var> translation. If
you have a simple text printer then you may want
to use the much easier to configure <b class=
"APPLICATION">lpf</b> filter from the <b class=
"APPLICATION">LPRng</b> distribution (<a href=
"http://www.lprng.com" target=
"_top">http://www.lprng.com</a>).</p>
</li>
<li>
<p>Vendor Specific There is a growing trend to
have very proprietary Print Languages for very
low end (less than $300) printers. These printers
usually require all of their jobs to be
preformated by software running on the host and
to have the job delivered to them in a specific
manner. If you have one of these printers, you
will need to get a rasterizing program that
produces the correct format. Check to see if <a
href="#GHOSTSCRIPT">GhostScript</a>, supports
your printer. If it does then you can use <var
class="LITERAL">GhostScript</var> to translate
PostScript to your printer's required format.</p>
</li>
</ol>
<br>
<br>
</li>
<li>
<p>Memory Size. If you are going to be sending large
print jobs or ones with a large amount of graphics to
the printer, you will need a substantial amount of
memory to deal with rasterization. Most high
resolution Laser Copier based printers require a
minimum of 16 megabytes for adequate performance, and
if you are printing complex PostScript or PDF
documents you may want at least 32 megabytes. Color
printers require substantially more and 64 megabytes
is not uncommon.</p>
</li>
<li>
<p>Communications. The connection between your
printer and the host computer.</p>
<ol type="a">
<li>
<p>Network Connection This is the most reliable
and high speed way to connect a printer to a
system. This is especially true if a printer must
be accessible to multiple users and is located at
a distance from the user.</p>
</li>
<li>
<p>Parallel Port (<var class=
"LITERAL">status@</var>) The parallel port is a
<span class="emphasis"><i class=
"EMPHASIS">unidirectional</i></span>
communications channel and does not do full
duplex bidirectional communications. Some
operating system support bidirectional
communications, but they do so by requiring write
operations to alternate with read operations.</p>
</li>
<li>
<p>Serial Ports This is the very worst way to
communicate at high speed with a printer. Serial
ports usually have a high error rate, suffer from
data overruns, and have a severe impact on system
performance. You will need to configure your
printer speed, format (bits per character,
parity, stop bit), and flow control method, and
then do the same for the host. This can be an
endless source of frustration for the novice
user.</p>
</li>
<li>
<p>Print Server Box Many older printers do not
directly support a network connection and have an
external <span class="emphasis"><i class=
"EMPHASIS">print server box</i></span> attached
to either their serial or parallel ports. If you
have the printer connected to a parallel port,
then you will still most likely only have
unidirectional communication and no status
information will be available from the
printer.</p>
</li>
</ol>
<br>
<br>
</li>
</ol>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="NETWORKPROTOCOLS">4.2. Network
Communication Protocols</a></h2>
<p>The most high speed and reliable connection to your
printer is using a network connection. The following
protocols are usually used to communicate with a network
printer: RFC1179 (TCP/IP printing), Socket Protocol
(TCP/IP), AppSocket Protocol (TCP/IP), Novell Print
Protocol (IPX), SMB Print Protocol (TCP/IP), and
AppleTalk Print Protocol (TCP/IP).</p>
<p>It is highly recommended that you use TCP/IP
networking to communications to talk to your printer, and
that you do not enable any other protocol on your
printer. If you have two different systems trying to
connect to the same printer using different protocols, a
wide range of vendor's hardware will lock up and may
require a power up reset to recover. Documented evidence
for this behavior includes a wide range of printers,
including those from Hewlett-Packard, LexMark, IBM and
other vendors.</p>
<p>Only the TCP/IP based network job transfer protocols
are discussed in this document. For details on using
other protocols, please consult the consult the <a href=
"http://www.lprng.com" target="_top"><b class=
"APPLICATION">LPRng</b></a> documentation.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="RFC1179PC">4.3. RFC1179 (BSD
or TCP/IP) Job Transfer Printcap Entry</a></h2>
<p>RFC1179 is used to transfer print jobs between a
client (user) and a print spooler, or between two print
spoolers. Jobs are transferred as a set of files, and the
only information exchanged during the transfer process is
the success or failure of the transfer. In order to get
status about the actual job printing, a separate query
status (<b class="APPLICATION">lpq</b>) is sent to the
print spooler.</p>
<p>Many, if not all, printers with a network interface
that supports the TCP/IP protocol support the RFC1179
protocol for job transfer. However, their support for
print job status is usually minimal to non-existent. If
you want to send a job to a printer using the RFC1179
protocol, please be aware of the following problems.</p>
<p>Normally a print spooler (System 5 lp, BSD lpd, <b
class="APPLICATION">LPRng</b>) does not modify a print
job when forwarding it to another print spooler. This
means that your print job will normally pass from the
originating <b class="APPLICATION">lp</b> or <b class=
"APPLICATION">lpr</b> program to the destination printer
with no changes. This can have disastrous results if the
job <span class="emphasis"><i class=
"EMPHASIS">requires</i></span> filter processing.</p>
<p>If you are using the <b class="APPLICATION">LPRng</b>
print spooler, job transfers using <var class=
"LITERAL">RFC1179</var> is specified by using <var class=
"LITERAL">:lp=spoolqueue@host</var> or <var class=
"LITERAL">:rp=spoolqueue:rm=host</var> printcap entries.
For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN1883"></a>
<pre class="SCREEN">
raw:
:lp=raw@host
:sh:sf:mx=0
:sd=/var/spool/lp
cooked:
:rp=cooked:rm=host
:sh:sf:mx=0
:sd=/var/spool/lp
:filter=/usr/local/libexec/filters/ifhp
</pre>
</div>
<br>
<br>
<p>The <var class="LITERAL">raw</var> queue does not have
a filter and jobs sent to the <var class=
"LITERAL">raw</var> are transfered intact from the <var
class="LITERAL">raw</var> queue to the destination <var
class="LITERAL">raw</var> printer on the <var class=
"LITERAL">host</var> server.</p>
<p>Jobs sent to the <var class="LITERAL">cooked</var>
queue will be processed by the program specified by the
<var class="LITERAL">filter</var> option. For each data
file in the job, the <b class="APPLICATION">lpd</b> print
spooler will open a temporary file to hold the filter
output, and then run the filter program with its <acronym
class="ACRONYM">STDIN</acronym> set to the job's data
file file and the <acronym class=
"ACRONYM">STDOUT</acronym> set to the temporary file. The
filter <acronym class="ACRONYM">STDERR</acronym> will be
recorded in an error log.</p>
<p>When a job is created a job format may specified
(default is <var class="LITERAL">f</var>), and an filter
can be specified to process job files with this format.
The <var class="LITERAL">:i</var><<span class=
"emphasis"><i class="EMPHASIS">format</i></span>>
option specifies the filter program for use. For example,
you can specify a different filter for the <var class=
"LITERAL">n</var> format as shown below. The <var class=
"LITERAL">translate_format</var> option specifies the
resulting format for the processed files, and uses a
format similar to the UNIX <var class=
"LITERAL">try</var>(1) program. In the example, it
specifies that the output of the filter for the <var
class="LITERAL">n</var> format be renamed as <var class=
"LITERAL">f</var>.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN1907"></a>
<pre class="SCREEN">
cooked:
:rp=cooked:rm=host
:sh:sf:mx=0
:sd=/var/spool/lp
# default filter
:filter=/usr/local/libexec/filters/ifhp
# n filter
:nf=/usr/local/libexec/filters/nfilter
:translate_format=nf
</pre>
</div>
<br>
<br>
<p>There is a final option that is used when rather than
having a set of job files forwarded to a printer, a
single job file is desireable. This is usually the case
when sending a job to a host or printer that has a
defective RFC1179 spooler implementation, and drops or
misprints jobs with multiple files in them. The <var
class="LITERAL">lpd_bounce</var> option causes the output
of all the filters to be put into a single file, and the
output is then forwarded to the destination. You can also
use the <var class="LITERAL">bq_format</var> option to
specify the format of the job:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN1912"></a>
<pre class="SCREEN">
cooked:
:rp=cooked:rm=host
:sh:sf:mx=0
:sd=/var/spool/lp
# default filter
:filter=/usr/local/libexec/filters/ifhp
:lpd_bounce
# output has l (literal) or binary output
:bq_format=l
</pre>
</div>
<br>
<br>
<p>The <tt class="COMMAND">lpr -l</tt> or <tt class=
"COMMAND">lpr -b</tt> flag is used to specify the special
<var class="LITERAL">literal</var> or <var class=
"LITERAL">l</var> job format. Job that have the <var
class="LITERAL">l</var> format usually have only the most
perfunctory processing done by the filter.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="SOCKETPC">4.4. Socket Protocol
(TCP/IP) Operation Printcap Entry</a></h2>
<p>Many printers with a network interface provide a
TCP/IP port that is a direct connection to the internal
<span class="emphasis"><i class="EMPHASIS">print
engine</i></span>. If a TCP/IP connection is made to this
port and a file is sent over this connection, then the
print engine will process the file. More importantly, the
connection is bidirectional, and the printer will report
errors and status conditions over the connection. PJL and
PostScript status request commands can be sent to the
printer and the printer will respond with
information.</p>
<p>The <b class="APPLICATION">ifhp</b> filter makes
extensive use of this protocol, and provides support for
status and error reporting. In cooperation with the <b
class="APPLICATION">LPRng</b> print spooler, it will
provide a detailed description of the actual print job
progress and any error conditions that arise.</p>
<p>To use a Socket connection with <b class=
"APPLICATION">LPRng</b>, you use the <var class=
"LITERAL">:lp=host%port</var> printcap entry shown below.
The <b class="APPLICATION">lpd</b> print spooler will
open a connection to the TCP/IP <var class=
"LITERAL">port</var> on <span class="emphasis"><i class=
"EMPHASIS">host</i></span> and passes the (bidirectional)
connection to the <b class="APPLICATION">ifhp</b> filter
on file descriptor 1 (<acronym class=
"ACRONYM">STDOUT</acronym>) and the file to be printed on
file descriptor 0 (<acronym class=
"ACRONYM">STDIN</acronym>). Errors and status information
are reported by the <b class="APPLICATION">ifhp</b>
filter on file descriptor 2 (<acronym class=
"ACRONYM">STDOUT</acronym>) and placed in the error
status log by the <b class="APPLICATION">lpd</b> print
spooler.</p>
<p>The connection made by the <b class=
"APPLICATION">lpd</b> server to the printer is <span
class="emphasis"><i class=
"EMPHASIS">persistent</i></span> over the entire job; all
file transfers for the same job are made over the same
connection. This is important as it prevents other
printer users from <span class="emphasis"><i class=
"EMPHASIS">hijacking</i></span> the printer in the middle
of print a job and getting your job outputs mixed
together.</p>
<p>The following is a typical printcap entry using the
socket protocol.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN1944"></a>
<pre class="SCREEN">
raw:
:lp=host%9100
:sh:sf:mx=0
:sd=/var/spool/lp
:filter=/usr/local/libexec/filters/ifhp
</pre>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="APPSOCKETPC">4.5. Appsocket
Protocol (TCP/IP) Operation</a></h2>
<p>The Tektronics Phaser Series printers and QMS printers
use the <span class="emphasis"><i class=
"EMPHASIS">Appsocket</i></span> protocol when sending a
job to the printer. This protocol uses two ports: a
TCP/IP <span class="emphasis"><i class=
"EMPHASIS">listening</i></span> port which accepts TCP/IP
connections and a UDP <span class="emphasis"><i class=
"EMPHASIS">SNMP query</i></span> port that is used to
obtain status information.</p>
<p>The Appsocket protocol is (briefly):</p>
<ol type="1">
<li>
<p>The Simple Network Management Protocol (SNMP) is a
UDP protocol. A SNMP Query packet containing a
request for information is sent to the printers SNMP
Agent port (port 161), and a reply containing the
requested information is returned.</p>
</li>
<li>
<p>To send a job to the printer, a TCP/IP connection
is opened to the TCP/IP port and job data is sent.
Only a single job can be sent at a time - a EOJ in
the job, i.e.- CTRL-D for PostScript or ESC E for PCL
will cause the printer to terminate reading from the
TCP/IP port, and after job processing has finished,
to close the TCP/IP connection. All input after the
EOJ may be ignored by the printer and not
processed.</p>
</li>
<li>
<p>While processing the job, if <span class=
"emphasis"><i class=
"EMPHASIS">bidirectional</i></span> support is
available and has been enabled the printer will
return job status or information until all of the
print job which is has received has been processed.
This support is usually not enabled by default and
must be enabled by using a specialized administration
interface or configuration tool.</p>
</li>
<li>
<p>Unfortunately, some printers will also close the
connection when the EOJ has been received. These
printers are virtually useless when trying to get
error or status information about a job.</p>
</li>
<li>
<p>Even more annoying is the behavior of some
printers that insist on the network connection
remaining open until the job has been processed. The
device sending the job to the printer must do a <span
class="emphasis"><i class=
"EMPHASIS">shutdown</i></span> on the sending
direction of the network connection, and then read
status information from the receiving direction until
the printer terminates the connection. Unfortunately,
some printers <span class="emphasis"><i class=
"EMPHASIS">do not</i></span> terminate the
connection, and the the user must close the
connection after a suitable timeout.</p>
</li>
<li>
<p>There are also printers that insist on the network
connection being closed before they will start
processing small jobs. The device sending the job to
the printer must do a <span class="emphasis"><i
class="EMPHASIS">close</i></span> rather than a
shutdown.</p>
</li>
<li>
<p>While processing the job, the printer will ignore
any connection requests, and only until the job has
been processed will the printer accept
connections.</p>
</li>
<li>
<p>During job processing, status and error
indications can be obtained by sending a query to the
UDP port. However, the error conditions and other
information are not very precise as the status may
change dramatically during job processing.</p>
</li>
<li>
<p>a query to the UDP port. However, the error
conditions and other information are not very precise
as the status may change dramatically during job
processing.</p>
</li>
</ol>
<br>
<br>
<p>The Appsocket protocol does not use a <span class=
"emphasis"><i class="EMPHASIS">persistent</i></span>
connection. If two people are sending jobs to the printer
simultaneously it is very likely that the jobs will get
intermixed.</p>
<p>The <var class="LITERAL">appsocket</var> option causes
the <b class="APPLICATION">ifhp</b> filter to open and
close a TCP/IP connection to the printer. In order to
reopen the device, <b class="APPLICATION">ifhp</b> needs
the device name. It gets this from the <var class=
"LITERAL">PRINTCAP_ENTRY</var> environment variable which
has the device information, or by using the TCP/IP
address of the initial end of the connection.</p>
<p>The <var class="LITERAL">close_appsocket</var> option
causes the <b class="APPLICATION">ifhp</b> filter to
close the connection after sending a job or part of a
job. This is necessary with printers that will not start
printing small jobs until a sufficient number of pages
has been received.</p>
<p>The following is a sample printcap entry for this
printer:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN1987"></a>
<pre class="SCREEN">
# Phaser Setup
# Appsocket
lp:server
:<var class="LITERAL">lp=10.0.0.1%9100</var>
:sd=<span class="emphasis"><i class=
"EMPHASIS">spooldir</i></span>
:...
:ifhp=model=ps,appsocket
#path to ifhp filter
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
<p>For your convenience, the <var class=
"LITERAL">model=phaser</var> entry is suitable for use
with the appsocket protocol.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="SNMP">4.6. Using SNMP For
Status Information</a></h2>
<ul>
<li>
<p><var class="LITERAL">snmp_monitor</var> FLAG <span
class="emphasis"><i class="EMPHASIS">use snmp for
status</i></span></p>
</li>
<li>
<p><var class="LITERAL">snmp_program=</var> <span
class="emphasis"><i class="EMPHASIS">path to
snmp_printer_status</i></span></p>
</li>
<li>
<p><var class="LITERAL">snmp_program_cfg=</var> <span
class="emphasis"><i class=
"EMPHASIS">snmp_printer_status configuration
file</i></span></p>
</li>
<li>
<p><var class="LITERAL">snmp_model=</var><span class=
"emphasis"><i class="EMPHASIS">snmp model
information</i></span></p>
</li>
<li>
<p><var class="LITERAL">snmp_sync_status=</var><span
class="emphasis"><i class="EMPHASIS">sync
indicators</i></span></p>
</li>
<li>
<p><var class="LITERAL">snmp_end_status=</var><span
class="emphasis"><i class="EMPHASIS">end of job
indicators</i></span></p>
</li>
<li>
<p><var class="LITERAL">snmp_end_status=</var><span
class="emphasis"><i class="EMPHASIS">end of job
indicators</i></span></p>
</li>
</ul>
<p>The <b class="APPLICATION">ifhp</b> filter can be
configured to use the SNMP helper program <var class=
"LITERAL">snmp_printer_status</var> to obtain SNMP
status. This program is supplied as part of the <b class=
"APPLICATION">ifhp</b> distribution.</p>
<p>The <var class="LITERAL">snmp_monitor</var> flag is
used to enable the use of the <var class=
"LITERAL">snmp_printer_status</var> program. The <var
class="LITERAL">snmp_program</var> specifies the program
path and command line to invoke it. The <var class=
"LITERAL">snmp_program_conf</var> specifies the path to
the configuration file, <var class=
"LITERAL">snmp_printer_stastus.conf</var>. The
configuration file contains information about the
operation of the program as well as the SNMP Object
Identifiers (OIDs) for the status information.</p>
<p>Since different printers may not support all of the
standard Printer MIB Oids, the <var class=
"LITERAL">snmp_printer_status.conf</var> can identify the
options on a per-printer model basis, and the appropriate
ones can be selected using the <var class=
"LITERAL">snmp_model</var> option.</p>
<p>The <var class="LITERAL">snmp_printer_status</var>
program returns status information on it STDOUT and
errors on its STDERR. The status information has the
format:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2040"></a>
<pre class="SCREEN">
PRINTERNAME=HP LaserJet 2200
DEVICEID=HP LaserJet
STATUS=Ready
DEVICESTATUS=running
PRINTERSTATUS=idle
PAGECOUNT=30
</pre>
</div>
Consult the <var class=
"LITERAL">snmp_printer_status</var> program and <var
class="LITERAL">snmp_printer_status.conf</var> files for
details of how the status is obtained.<br>
<br>
<p>When using <var class="LITERAL">snmp</var> to detect
idle or end conditions, the <var class=
"LITERAL">snmp_sync_status</var> and the <var class=
"LITERAL">snmp_end_status</var> values are used. If the
retured status matches a field in the <var class=
"LITERAL">snmp_sync_status</var> list, then a idle
printer condtion is assumed. If the retured status
matches a field in the <var class=
"LITERAL">snmp_end_status</var> list, then an end of job
condtion is assumed. For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2050"></a>
<pre class="SCREEN">
snmp_end_status=ready idle
snmp_sync_status=ready power_save_mode
</pre>
</div>
<br>
<br>
<p>When using SNMP to obtain status, it may be of little
benefit to use other methods to obtain sync, pagecount,
or end of job (waitend). Also, if a connection is open to
the printer then the printer may never indicate <var
class="LITERAL">idle</var> or non-printing status. This
problem can be avoided by using the <var class=
"LITERAL">appsocket</var> protocol. If you use this, then
you should also set the <var class="LITERAL">sync</var>,
<var class="LITERAL">waitend</var>, and <var class=
"LITERAL">pagecount</var> values to <var class=
"LITERAL">snmp</var> as well. For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2059"></a>
<pre class="SCREEN">
[ printer ]
snmp_monitor
appsocket
sync=snmp
waitend=snmp
pagecount=snmp
</pre>
</div>
This will cause the <b class="APPLICATION">ifhp</b> to
perform the operations but not to send any query strings
to the printer.<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2062">4.7. Common Print
Server Boxes Configuration Information</a></h2>
<p>The following is a list of print server manufacturers,
models, and with hints on how to access these boxes with
various protocols.</p>
<div class="TABLE">
<a name="NETWORKPRINTSERVERS"></a>
<p><b>Table 4-1. Network Print Servers</b></p>
<table border="1" frame="border" rules="all" class=
"CALSTABLE">
<col>
<col>
<col>
<col>
<thead>
<tr>
<th>Manufacturer</th>
<th>Model</th>
<th>RFC1179 Port Name (rp=XXX)</th>
<th>Send to TCP port</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="http://www.digprod.com/" target=
"_top">Digital Products Inc.</a></td>
<td>NETPrint Print Server</td>
<td><var class="LITERAL">PORT</var><span class=
"emphasis"><i class="EMPHASIS">n</i></span>,
where <span class="emphasis"><i class=
"EMPHASIS">n</i></span> is port on server</td>
<td>- Unknown if supported -</td>
</tr>
<tr>
<td rowspan="4"><a href="http://www.efi.com/"
target="_top">Electronics For Imaging
Inc.</a></td>
<td>Fiery RIP i series</td>
<td><var class="LITERAL">normalq</var> or <span
class="emphasis"><i class=
"EMPHASIS">urgentq</i></span></td>
<td>- Unknown if supported -</td>
</tr>
<tr>
<td>Fiery RIP XJ series</td>
<td><var class="LITERAL">xjprint</var></td>
<td>- Unknown if supported -</td>
</tr>
<tr>
<td>Fiery RIP XJ+ and SI series</td>
<td><var class="SYMBOL">print_</var><span class=
"emphasis"><i class="EMPHASIS">Model</i></span>,
e.g. <var class=
"SYMBOL">print_DocuColor</var></td>
<td>- Unknown if supported -</td>
</tr>
<tr>
<td>Fiery models ZX2100, ZX3300, X2, X2e</td>
<td><var class="LITERAL">print</var></td>
<td>- Unknown if supported -</td>
</tr>
<tr>
<td><a href="http://www.emulex.com/" target=
"_top">Emulex Corp.</a></td>
<td>NETJet/NETQue print server</td>
<td><acronym class=
"ACRONYM">PASSTHRU</acronym></td>
<td>- Unknown if supported -</td>
</tr>
<tr>
<td><a href="http://www.extendsys.com/" target=
"_top">Extended Systems Inc.</a></td>
<td>ExtendNet Print Server</td>
<td><span class="emphasis"><i class=
"EMPHASIS">Printer<var class=
"REPLACEABLE">n</var></i></span>, where <span
class="emphasis"><i class="EMPHASIS">n</i></span>
is port on server</td>
<td>- Unknown if supported -</td>
</tr>
<tr>
<td rowspan="2"><a href="http://www.hp.com/"
target="_top">Hewlett-Packard</a></td>
<td>JetDirect interface card</td>
<td><var class="LITERAL">raw</var></td>
<td>9100</td>
</tr>
<tr>
<td>JetDirect Print Server</td>
<td>Port1=<var class="LITERAL">raw1</var>,
Port2=<var class="LITERAL">raw2</var>, ...</td>
<td>Port1=9100, Port2=9101, ...</td>
</tr>
<tr>
<td><a href="http://www.i-data.com/" target=
"_top">I-Data</a></td>
<td>Easycom 10 Printserver</td>
<td><var class="LITERAL">par1</var> (parallel
port 1)</td>
<td>- Unknown if supported -</td>
</tr>
<tr>
<td> </td>
<td>Easycom 100 Printserver</td>
<td><var class="LITERAL">LPDPRT1</var></td>
<td>- Unknown if supported -</td>
</tr>
<tr>
<td><a href="http://www.printers.ibm.com/"
target="_top">IBM</a></td>
<td>Network Printer 12, 17, 24, and 24PS</td>
<td><acronym class="ACRONYM">PASS</acronym></td>
<td>- Unknown if supported -</td>
</tr>
<tr>
<td><a href="http://www.lantronix.com/" target=
"_top">Lantronix</a></td>
<td>EPS1, EPS2</td>
<td><var class="LITERAL">EPS_XXXX_S1 (serial)
port 1, EPS_XXXX_P1 (parallel) port 2</var>,
etc.</td>
<td>3001 (port 1), 3002 (port 2), etc.</td>
</tr>
<tr>
<td><a href="http://www.qms.com/" target=
"_top">QMS</a></td>
<td>Various Models</td>
<td><acronym class="ACRONYM">RAW</acronym></td>
<td>35 (Appsocket)</td>
</tr>
<tr>
<td><a href="http://www.tek.com/color_printers/"
target="_top">Tektronix</a> (Now <a href=
"http://www.tektronix.xerox.com" target=
"_top">Xerox</a>)</td>
<td>Tektronix printer network cards</td>
<td><acronym class="ACRONYM">PS</acronym>
(PostScript), <acronym class=
"ACRONYM">PCL</acronym> (PCL), or <acronym class=
"ACRONYM">AUTO</acronym>(Auto-selection between
PS, PCL, or HPGL). Not reliable.</td>
<td>9100 (Appsocket on some models)</td>
</tr>
<tr>
<td><a href="http://www.rosel.com" target=
"_top">Rose Electronics</a></td>
<td>Microserve Print Servers</td>
<td>lp</td>
<td>9100</td>
</tr>
<tr>
<td rowspan="6"><a href="http://www.xerox.com/"
target="_top">Xerox</a></td>
<td>Models 4505, 4510, 4517, 4520</td>
<td><acronym class=
"ACRONYM">PASSTHRU</acronym></td>
<td>2501 (Appsocket on some models)</td>
</tr>
<tr>
<td>Model 4512</td>
<td><var class="LITERAL">PORT1</var></td>
<td>10001 (programmable)</td>
</tr>
<tr>
<td>Model N17</td>
<td><acronym class="ACRONYM">RAW</acronym></td>
<td>9100</td>
</tr>
<tr>
<td>Models N24 and N32</td>
<td><acronym class="ACRONYM">RAW</acronym></td>
<td>2000</td>
</tr>
<tr>
<td>Models 4900, 4915, 4925, C55</td>
<td><acronym class="ACRONYM">PS</acronym></td>
<td>2000</td>
</tr>
<tr>
<td>Document Centre DC220/230</td>
<td><var class="LITERAL">lp</var></td>
<td>- Unknown if supported -</td>
</tr>
</tbody>
</table>
</div>
<br>
<br>
<p>All company, brand, and product names are properties
of their respective owners.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2222">4.8. Timeout Problems
Sending A Job</a></h2>
<p>The <b class="APPLICATION">ifhp</b> filter may need to
run a program such as <var class=
"LITERAL">ghostscript</var> to do format conversion. For
large files this can take quite a bit of time and most
network printers have a <span class="emphasis"><i class=
"EMPHASIS">connection timeout</i></span>. If no data is
received for this time the printer will close the
connection. By default this timeout is fairly short: 30
or 90 seconds on most printers.</p>
<p>If you are sending large jobs to the printer using the
<var class="LITERAL">socket</var> protocol and are
getting timeout problems due to conversion timeouts, then
there are two solutions: a) use the Appsocket protocol,
which will open and close the connection for each file,
and only send data when the converted file is available,
or b) do your conversions first and then spool the
converted job to be sent directly to the printer. The
second method requires an <b class=
"APPLICATION">LPRng</b> bounce queue.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2231"></a>
<pre class="SCREEN">
# Method a) Appsocket
lp:server
:lp=10.0.0.1%9100
:sd=<span class="emphasis"><i class=
"EMPHASIS">spooldir</i></span>
:...
:ifhp=model=printer,appsocket
#path to ifhp filter
:filter=/.../ifhp
# Method b) Bounce Queue
# this queue does the conversion if required
lp:server
:lpd_bounce
:lp=real@localhost
:sd=<span class="emphasis"><i class=
"EMPHASIS">spooldir</i></span>
:...
:ifhp=model=printer
#path to ifhp filter
:filter=/.../ifhp
# this queue does transmission
real:server
:lp=10.0.0.1%9100
:sd=<span class="emphasis"><i class=
"EMPHASIS">spooldir</i></span>
:ifhp=model=printer
#path to ifhp filter
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
<p>For method a), the Appsocket protocol is used and the
<b class="APPLICATION">ifhp</b> filter will be invoked
before sending a job. For method b), you use two queues:
a <span class="emphasis"><i class=
"EMPHASIS">bounce</i></span> queue that does the format
conversion and then sends the job to the real queue, and
the real queue that actually talks to the printer.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="RWTIMEOUT">4.9. Printers With
Lockup Problems</a></h2>
<p>Due to firmware problems in some PostScript and PCL
printers, they will occasionally lock up and refuse to
accept new connections or continue with job processing.
This is extremely difficult to diagnose, as the printer
appears to be functional but will simply not accept any
addition data or respond to a command.</p>
<p>Unfortunately, this is also the condition when these
printers are turned offline.</p>
<p>The <var class="LITERAL">send_job_rw_timeout</var>
option is used to set a maximum timeout for network
and/or communication operations. This value can be set to
the maximum expected completion time of the print job.
When this time is exceeded, the IFHP filter will exit
with a <var class="LITERAL">JTIMEOUT</var> error.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2246">4.10. PS, PCL, PJL
Printer with TPC/IP Network Interface</a></h2>
<p>The most common TCP/IP protocols used for transferring
jobs to network printers are <a href="#RFC1179PC">RFC
1179</a>, a direct TCP/IP <a href="#SOCKETPC">socket</a>,
connection to the print engine, and the very odd <a href=
"#APPSOCKETPC">Appsocket</a> protocol described in
previous sections. Here is a reprise of the various
printcaps and methods to use them.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2252"></a>
<pre class="SCREEN">
# printer setup
# force clients (lpr, lpq, to use server)
lp:lp=lp@serverhost
# server information
lp:server
:sd=<span class="emphasis"><i class=
"EMPHASIS">spooldir</i></span>
:...
# No filtering, transfer using RFC1179, use:
:lp=queue@10.1.1.1
# or
:rp=queue:rm=10.1.1.1
# Filtering and then transfer using RFC1179, use:
:lpd_bounce:lp=queue@10.1.1.1
# or
:lpd_bounce:rp=queue:rm=10.1.1.1
:ifhp=model=<span class="emphasis"><i class=
"EMPHASIS">name</i></span>
:filter=/.../ifhp
# Filter, transfer using socket, use:
:lp=10.1.1.1%9100
:ifhp=model=<span class="emphasis"><i class=
"EMPHASIS">name</i></span>
:filter=/.../ifhp
# Filter, transfer using Appsocket, use:
:lp=10.1.1.1%9100
:ifhp=model=<span class="emphasis"><i class=
"EMPHASIS">name</i></span>,appsocket
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
<p>If your printer is a parallel port printer connected
to an <span class="emphasis"><i class=
"EMPHASIS">external</i></span> Network Print Spooler such
as an HP JetDirect box, then while the network connection
to the Network Print Spooler is bidirectional the
connection from the Network Print Spooler to the printer
may be unidirectional and no status information will be
returned from the Network Print Spooler. In this case you
<span class="emphasis"><i class=
"EMPHASIS">must</i></span> add the <var class=
"LITERAL">status@</var> option to tell <b class=
"APPLICATION">ifhp</b> not to expect status:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2263"></a>
<pre class="SCREEN">
# Filter, transfer using socket
:lp=10.1.1.1%9100
:ifhp=model=<span class="emphasis"><i class=
"EMPHASIS">name</i></span>,status@
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2266">4.11. PS, PCL, PJL
Printer with Parallel Port Connection</a></h2>
<p>If your printer is connected to a <span class=
"emphasis"><i class="EMPHASIS">bidirectional</i></span>
parallel port you may be able to read status from the
printer. First, determine if your printer has
bidirectional IO capability and if your operating system
has support for it. If it does not, then do not use the
<var class="LITERAL">:rw</var> (open connection
read-write) option to open the printer device in read
write mode.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2271"></a>
<pre class="SCREEN">
# printer setup
# force clients (lpr, lpq, to use server)
lp:lp=lp@serverhost
# server information
lp:server
# do now open read write
:rw@
:sd=<span class="emphasis"><i class=
"EMPHASIS">spooldir</i></span>
:...
# parallel port
:lp=/dev/lpt
#path to ifhp filter
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
<p>If, on the other hand, your operating system reports
that the parallel port is bidirectional and is able to
read the printer model information, then you can try
opening the parallel port read-write and seeing if the <b
class="APPLICATION">ifhp</b> filter can read status
information:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2276"></a>
<pre class="SCREEN">
# printer setup
# force clients (lpr, lpq, to use server)
lp:lp=lp@serverhost
# server information
lp:server
# open read write
:rw
:sd=<span class="emphasis"><i class=
"EMPHASIS">spooldir</i></span>
:...
# parallel port
:lp=/dev/lpt
#path to ifhp filter
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2279">4.12. PS, PCL, PJL
Printer with Serial Port</a></h2>
<p>It is strongly advised that serial ports not be used
for high speed data transfers. The main problem is trying
to configure them in such as way that they do not lose
characters due to data overruns or parity errors. LPRng
is strongly deprecating support for serial port
printers.</p>
<p>The <b class="APPLICATION">LPRng</b> print spooler
will open and set the serial line characteristics, and
pass the open connection to the <b class=
"APPLICATION">ifhp</b> filter. The <var class=
"LITERAL">tty</var> connection must pass all 8 bits with
no parity, and should use hardware flow control if at all
possible. Unfortunately, the various <var class=
"LITERAL">stty</var> options needed to do this vary from
system to system. Also, you may discover that your serial
connection does not support hardware flow control. If
this is the case, then you will have to use software flow
control which is rather unreliable for high speed (over
9600) serial lines due to the timing latencies
involved.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2287"></a>
<pre class="SCREEN">
# printer setup
# force clients (lpr, lpq, to use server)
lp:lp=lp@serverhost
# server information
lp:server
:sd=<span class="emphasis"><i class=
"EMPHASIS">spooldir</i></span>
:...
# serial port
:lp=<tt class="FILENAME">/dev/ttyxxx</tt>
:stty=38400 -echo -crmod -raw -oddp -evenp \
ixon pass8 -ixany cbreak crtscts
#path to ifhp filter
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="PSONLY">4.13. PostScript Only
Printer</a></h2>
<p>The <var class="LITERAL">model=ps</var> entry supports
PostScript only printers.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2295"></a>
<pre class="SCREEN">
# printer setup
# force clients (lpr, lpq, to use server)
lp:lp=lp@serverhost
# server information
lp:server
:sd=<span class="emphasis"><i class=
"EMPHASIS">spooldir</i></span>
:...
:ifhp=model=ps
#path to ifhp filter
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
<p>If you have a <span class="emphasis"><i class=
"EMPHASIS">unidirectional</i></span> or <span class=
"emphasis"><i class="EMPHASIS">write only</i></span> (no
status information) connection such as a parallel port
you should use:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2301"></a>
<pre class="SCREEN">
:ifhp=model=ps,status@
</pre>
</div>
<br>
<br>
<p><a name="PS-EOJ"></a> <a name="PS-EOJ-AT-START"></a>
<a name="PS-EOJ-AT-END"></a> <a name=
"PCL-EOJ-AT-START"></a> Many PostScript printers
recognize the PostScript EOJ marker (Control-D or <var
class="LITERAL">\004</var>) as an end of PostScript job
indication and will perform page eject and other suitable
actions. Unfortunately, strictly according to PostScript
documentation this character is only allowed in the
Serial Port Data Stream, and there are some printers that
treat it as an error. In addition, the Control-T
character is recognized as a printer status solicitation,
and some printers do not return status or recognize it as
an error.</p>
<p>If your printer does not handle PostScript EOJ
(Control-D) at all, set <var class=
"LITERAL">ps_eoj@</var> to suppress generation of extra
Control-D characters by <b class="APPLICATION">ifhp</b>.
If your printer requires a Control-D at the end of the
job but fails when they occur at the start of the job,
set <var class="LITERAL">ps_eoj_at_start@</var>. If the
printer requires a Control-D at the start but not at the
end, set <var class="LITERAL">ps_eoj_at_start@</var>.</p>
<p>PCL based printers are not nearly as fussy. However,
you may discover that some of them do not correctly
handle a PCL EOJ at the start of a job in spite of all
examples and documention. Use the <var class=
"LITERAL">pcl_eoj_at_start@</var> to suppress adding a
PCL EOJ (Esc E) command string to the start of a PCL job
file.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2316"></a>
<pre class="SCREEN">
:ifhp=model=ps,ps_eoj@
</pre>
</div>
<br>
<br>
<p>See the section on <a href="#FILECONVERSION">File
Conversion Support</a> for ways to print text and other
files on a PostScript printer.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2320">4.14.
GhostScript</a></h2>
<p>Generating a raster image from a PostScript or PCL
file in a timely manner requires a high speed processor
and substantial amounts of memory. Many of the low cost
printers require the user's system to do the raster
conversion and the raster file is then transferred to the
printer. The file format is usually a subset of PCL.</p>
<p>The <a href="#GHOSTSCRIPT">GhostScript</a> program can
process PostScript files and produce raster output for a
wide range of devices. The <var class=
"LITERAL">ghostscript</var> <var class=
"LITERAL">pcl_gs</var> printer configurations is used
with these printers. See <a href=
"#GHOSTSCRIPTCONFIG">GhostScript Printer</a> for
details.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="PHASER">4.15. Tektronics
Phaser, QMS, and Appsocket Protocol</a></h2>
<p>The Tektronics Phaser, QMS Network Printers, and a few
others use the <a href="#APPSOCKETPC">Appsocket</a>
protocol described in a previous section. The Tektronics
(<var class="LITERAL">model=phaser</var>) configuration
entry has the required options for these printers:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2333"></a>
<pre class="SCREEN">
[ phaser qms ]
appsocket
ps
pjl@
pcl
</pre>
</div>
<br>
<br>
<p>The following shows a typical printcap entry:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2336"></a>
<pre class="SCREEN">
# force clients (lpr, lpq, to use server)
lp:lp=lp@serverhost
# server information
lp:server
:sd=<span class="emphasis"><i class=
"EMPHASIS">spooldir</i></span>
:lp=10.1.1.1%35
:...
:ifhp=model=phaser
#path to ifhp filter
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
</div>
</div>
<div class="CHAPTER">
<hr>
<h1><a name="OPTIONS"></a>Chapter 5. Options and
Arguments</h1>
<ul>
<li>
<p><var class="LITERAL">model=</var><span class=
"emphasis"><i class="EMPHASIS">Model
Information</i></span></p>
</li>
<li>
<p><var class="LITERAL">model_from_option=</var><span
class="emphasis"><i class="EMPHASIS">Option with model
information</i></span></p>
</li>
</ul>
<p>The <b class="APPLICATION">ifhp</b> filter is designed
to work with the <b class="APPLICATION">LPRng</b> print
spooler and expects to be passed the standard set of filter
options. These have the form:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2353"></a>
<pre class="SCREEN">
/.../ifhp [-c] [-X option]* accountingfile
Example:
/.../ifhp -n root -H hostname -P printer -s statusfile acct
# - X is any letter except T
</pre>
</div>
<br>
<br>
<p>All of the option letters except <var class=
"LITERAL">T</var> are reserved by the <b class=
"APPLICATION">LPRng</b> program to pass information to the
filter. For details about the options, please consult the
<b class="APPLICATION">LPRng</b> documentation.</p>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2359">5.1. Command Line
Options</a></h2>
<p>The most important options that <b class=
"APPLICATION">LPRng</b> passes and that <b class=
"APPLICATION">ifhp</b> uses are:</p>
<div class="VARIABLELIST">
<dl>
<dt>-s statusfile</dt>
<dd>
<p>The file where <b class="APPLICATION">ifhp</b>
status information is placed.</p>
</dd>
<dt>-Z useroptions</dt>
<dd>
<p>The <tt class="COMMAND">lpr -Z</tt> options
passed by the user, and are discussed in the <a
href="#OPTIONS">options</a> section.</p>
</dd>
<dt>-T options</dt>
<dd>
<p>These are usually options specified in the
printcap entry and are discussed in the <a href=
"#OPTIONS">options</a> section.</p>
</dd>
<dt>accountingfile</dt>
<dd>
<p>The file where accounting information is
written.</p>
</dd>
</dl>
</div>
<br>
<br>
<div class="INFORMALEXAMPLE">
<a name="AEN2386"></a>
<pre class="SCREEN">
Examples:
ifhp "-Tmodel=ps,status@" "-Za4,landscape"
</pre>
</div>
<br>
<br>
<p>Since commas are used to separate options, whitespace
is used to separate multiple values for a particular
option. You will need to quote this on a command line.
For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2389"></a>
<pre class="SCREEN">
ifhp "-Tfont=elite greek1 dingbat"
</pre>
</div>
<br>
<br>
<p>The <b class="APPLICATION">ifhp</b> program first
checks to see if the <acronym class=
"ACRONYM">PRINTCAP</acronym> environment variable is
defined. By convention, <b class="APPLICATION">LPRng</b>
will place the printer printcap entry in this variable
when it starts the <b class="APPLICATION">ifhp</b>
filter. The printcap <var class=
"LITERAL">:ifhp=options</var> value is extracted and used
as the default <var class="OPTION">-T</var> options.
After getting the options from the printcap, the <var
class="OPTION">-Toptions</var> command line options are
appended to the list of <var class="OPTION">-T</var>
options. The single letter command line options are also
made available to the <b class="APPLICATION">ifhp</b>
programs as shown below:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2401"></a>
<pre class="SCREEN">
PRINTCAP=lp:ifhp=model=this,status@:...
ifhp -n root -h localhost -Tmodel=that,debug=1
Concatenated -T options: model=this,status@,n=root,h=localhost,model=that,debug=1
Resulting -T options: status@,n=root,h=localhost,model=that,debug=1
</pre>
</div>
<br>
<br>
<p>The <var class="OPTION">-T</var> option list is
scanned from left to right, and later option values
override earlier ones. The <var class="OPTION">-T</var>
option values have priority over values that are obtained
from the configuration file and cannot be overridden.
There are several options that have important effects on
the operation of the <b class="APPLICATION">ifhp</b>
filter.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="CONFIG">5.2. General
Configuration Options - config, trace, debug</a></h2>
<ul>
<li>
<p><var class="LITERAL">config=</var><span class=
"emphasis"><i class="EMPHASIS">Configuration file
location</i></span></p>
</li>
<li>
<p><var class="LITERAL">debug=</var><span class=
"emphasis"><i class="EMPHASIS">Debug
options</i></span></p>
</li>
<li>
<p><var class="LITERAL">trace</var> FLAG <span class=
"emphasis"><i class="EMPHASIS">trace on <acronym
class="ACRONYM">STDERR</acronym></i></span></p>
</li>
</ul>
<p>These options are used to control the global operation
of the <b class="APPLICATION">ifhp</b> filter, and are
only available from the <var class="OPTION">-T</var>
command line options.</p>
<div class="VARIABLELIST">
<dl>
<dt>config=pathname</dt>
<dd>
<p>The <var class="LITERAL">config</var> option
specifies the location of the <tt class=
"FILENAME">ifhp.conf</tt> file. This overrides the
default location. The pathname can be a file name,
list of filenames separated by spaces, or a filter.
For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2433"></a>
<pre class="SCREEN">
ifhp '-Tconfig=/usr/local/etc/ifhp.conf'
ifhp '-Tconfig=|/usr/local/bin/getconfig'
</pre>
</div>
<br>
<br>
<p>The second example uses the <var class=
"LITERAL">getconfig</var> program to obtain
configuration information. The configuration
information is read from the program's STDOUT.
There program is invoked with no command line
options and is passed the environment variables
that were provided to <b class=
"APPLICATION">ifhp</b>.</p>
</dd>
<dt>model=MODEL</dt>
<dd>
<p>The <var class="LITERAL">model</var> option
selects the portion of the <b class=
"APPLICATION">ifhp</b> configuration that will set
values of configuration parameters. This is
discussed in detail in the next section.</p>
</dd>
<dt>trace</dt>
<dd>
<p>As <b class="APPLICATION">ifhp</b> processes the
print job, it produces tracing and error message
information. By default this is written to the
status file specified by the <var class=
"OPTION">-s</var> command line option. The <var
class="LITERAL">trace</var> option will cause this
information to be written to <acronym class=
"ACRONYM">STDERR</acronym> (file descriptor 2).
This is usually used in debugging.</p>
</dd>
<dt>debug=n</dt>
<dd>
<p>This option sets the debugging level to <var
class="LITERAL">n</var>, where <span class=
"emphasis"><i class="EMPHASIS">n</i></span> is an
integer number. Level 0 turns debugging off, level
1 produces a small amount of verbosity and
increasing levels produce more verbose
information.</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="STATUSFILE">5.3. Status
Messages</a></h2>
<ul>
<li>
<p><var class="LITERAL">statusfile=</var><span class=
"emphasis"><i class=
"EMPHASIS">statusfile</i></span></p>
</li>
<li>
<p><var class="LITERAL">statusfile_max=</var><span
class="emphasis"><i class="EMPHASIS">maximum status
file size</i></span></p>
</li>
<li>
<p><var class="LITERAL">statusfile_min=</var><span
class="emphasis"><i class="EMPHASIS">minimum status
file size</i></span></p>
</li>
<li>
<p><var class="LITERAL">summaryfile=</var><span
class="emphasis"><i class="EMPHASIS">one line summary
file</i></span></p>
</li>
</ul>
<div class="VARIABLELIST">
<dl>
<dt>statusfile=pathname or -s pathname</dt>
<dd>
<p>The status file pathname is set by the command
line <var class="OPTION">-s pathname</var>, or if
it is not present then the <var class=
"LITERAL">statusfile=pathname</var> configuration
option. The file must exist and will not be
created.</p>
</dd>
<dt>statusfile_max=n</dt>
<dd>
<p>If the status file is larger than <var class=
"SYMBOL">statusfile_max</var> K bytes (default 8K),
then it is truncated to <var class=
"LITERAL">statusfile_min=min</var> K bytes.</p>
</dd>
<dt>statusfile_min=n</dt>
<dd>
<p>The minimum size in Kbytes of the status file
after truncation (default 1K).</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="STATUS">5.4. Printer Status
Available - status</a></h2>
<ul>
<li>
<p><var class="LITERAL">status</var> FLAG <span
class="emphasis"><i class="EMPHASIS">status available
from device</i></span></p>
</li>
</ul>
<p>The <var class="LITERAL">status</var> option indicates
that there is a bidirectional connection to the printer,
and that status can be obtained from the connection.
During initialization the <b class="APPLICATION">ifhp</b>
filter will test the printer connection and determine if
it supports reading. If it does not then <b class=
"APPLICATION">ifhp</b> will set <var class=
"LITERAL">status@</var>.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2507">5.5. Monitoring
Options - sync, waitend, pagecount</a></h2>
<p>The <var class="LITERAL">sync</var>, <var class=
"LITERAL">waitend</var>, and <var class=
"LITERAL">pagecount</var> options are ignored if no
status is available from the printer. The <var class=
"LITERAL">sync</var> option specifies the method to use
to determine if the printer is ready and operational. The
<var class="LITERAL">waitend</var> option specifies the
method used to determine when a print job is finished.
The <var class="LITERAL">pagecount</var> option specifies
the method used to obtain pagecount or status
information.</p>
<div class="VARIABLELIST">
<dl>
<dt>sync@, waitend@, pagecount@</dt>
<dd>
<p>This form of the tag indicates that the
particular facility is disabled.</p>
</dd>
<dt>sync=pjl</dt>
<dd>
<p>PJL is used to determine if the printer is
ready. This can be done by sending a PJL JOB or PJL
ECHO command to the printer and waiting for return
status.</p>
</dd>
<dt>sync=ps</dt>
<dd>
<p>A small PostScript job which causes a status
report to be returned is sent to the printer.</p>
</dd>
<dt>waitend=pjl, waitend=ps</dt>
<dd>
<p>This is similar to the <var class=
"LITERAL">sync</var> operation, but is done at the
end of a job in order to determine if the printer
is busy.</p>
</dd>
<dt>pagecount=pjl</dt>
<dd>
<p>Many PJL capable printers support reporting
total page usage by means of PJL. This option
causes a PJL command to be sent requesting the
total page usage by the printer.</p>
</dd>
<dt>pagecount=ps</dt>
<dd>
<p>A small PostScript job which causes a status
report to be returned is sent to the printer.</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2542">5.6. User -Z Option
Support</a></h2>
<p>The <b class="APPLICATION">ifhp</b> filter provides a
simple way for users to request a particular printer
facility or option. The <var class="LITERAL">lpr
-Zkey=value</var> command causes the <b class=
"APPLICATION">lpd</b> print spooler to pass the <var
class="OPTION">-Z</var> options on the <b class=
"APPLICATION">ifhp</b> command line.</p>
<p>The <b class="APPLICATION">ifhp</b> filter implements
these options by first determining if they are allowed,
and then using them to select a set of strings that are
sent to the printer. Since some options are implement by
sending PJL strings to the printer, some by PostScript,
and some by PCL commands, the method of specifying and
generating them is a bit involved.</p>
<p>The following facility is used to control the names
and types of user options.</p>
<div class="VARIABLELIST">
<dl>
<dt>pjl_user_opts=[ ... ]</dt>
<dd>
<p>This tag specifies the list of user options that
are implemented by sending PJL strings to the
printer. This is available only if the printer is
PJL capable.</p>
</dd>
<dt>pcl_user_opts=[ ... ]</dt>
<dd>
<p>This tag specifies the list of user options that
are implemented by sending PCL strings to the
printer. This is available only if the printer is
PCL capable.</p>
</dd>
<dt>ps_user_opts=[ ... ]</dt>
<dd>
<p>This tag specifies the list of user options that
are implemented by sending PostScript strings to
the printer. This is available only if the printer
is PostScript capable.</p>
</dd>
</dl>
</div>
<br>
<br>
<p>For each option, the actual string or set of strings
is specified as follows.</p>
<div class="VARIABLELIST">
<dl>
<dt>pjl_<span class="emphasis"><i class=
"EMPHASIS">key</i></span>= ...</dt>
<dd>
<p>The value of the PJL user option <var class=
"LITERAL">key</var>. This value can be one or more
lines; the lines are checked for correct PJL format
and sent to the printer before any language
specific information.</p>
</dd>
<dt>ps_<span class="emphasis"><i class=
"EMPHASIS">key</i></span>= ...</dt>
<dd>
<p>The value of the PostScript user option <var
class="LITERAL">key</var>. This value can be one or
more lines; leading and trailing whitespace is
removed and the lines are placed before the first
lines of a PostScript job file.</p>
</dd>
<dt>pcl_<span class="emphasis"><i class=
"EMPHASIS">key</i></span>= ...</dt>
<dd>
<p>The value of the PCL user option <var class=
"LITERAL">key</var>. This value can be one or more
lines; whitespace and new lines are removed and the
characters are placed before the first characters
of a PCL job file.</p>
</dd>
</dl>
</div>
<br>
<br>
<p>The following user options are predefined in the
default <tt class="FILENAME">ifhp.conf</tt> file and are
recommended for use.</p>
<div class="VARIABLELIST">
<dl>
<dt>a3, a4, a5</dt>
<dd>
<p>Use a3, a4, or a5 paper</p>
</dd>
<dt>copies=N</dt>
<dd>
<p>Print N copies of a page or job</p>
</dd>
<dt>duplex</dt>
<dd>
<p>Use duplex printing, tumble on. Pages will come
out so that the margins are at opposite ends of a
page.</p>
</dd>
<dt>duplexshort</dt>
<dd>
<p>Use duplex printing, tumble off. Pages will come
out so that the margins are at the same ends of a
page.</p>
</dd>
<dt>envelope</dt>
<dd>
<p>Select envelope media</p>
</dd>
<dt>inlower</dt>
<dd>
<p>Select media from lower input bin.</p>
</dd>
<dt>inupper</dt>
<dd>
<p>Select media from upper input bin.</p>
</dd>
<dt>landscape</dt>
<dd>
<p>Use Landscape orientation</p>
</dd>
<dt>lduplex</dt>
<dd>
<p>Alias for duplex</p>
</dd>
<dt>ledger</dt>
<dd>
<p>Select ledger size (11x15 inches) media</p>
</dd>
<dt>legal</dt>
<dd>
<p>Select legal size (8.5x15 inches) media</p>
</dd>
<dt>letter</dt>
<dd>
<p>Select letter size (8.5x11 inches) media</p>
</dd>
<dt>manual</dt>
<dd>
<p>Select media from manual feed</p>
</dd>
<dt>mediaselect=N</dt>
<dd>
<p>Select media number N</p>
</dd>
<dt>outlower</dt>
<dd>
<p>Put output in lower tray or bin</p>
</dd>
<dt>outupper</dt>
<dd>
<p>Put output in upper tray or bin</p>
</dd>
<dt>oversize</dt>
<dd>
<p>Select oversize media</p>
</dd>
<dt>portrait</dt>
<dd>
<p>Use Portrait orientation</p>
</dd>
<dt>sduplex</dt>
<dd>
<p>Alias for duplexshort. Print on a single side of
the media.</p>
</dd>
<dt>simplex</dt>
<dd>
<p>Print on the single side of the media.</p>
</dd>
<dt>transparency</dt>
<dd>
<p>Select transparency media</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2673">5.7. Adding User
Options</a></h2>
<p>The following shows how to add a PJL option to an <tt
class="FILENAME">ifhp.conf</tt> file. By convention, the
configuration is added to the end of the <tt class=
"FILENAME">ifhp.conf</tt> file.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2678"></a>
<pre class="SCREEN">
[ newprinter ]
pjl_user_opts += [ screen ]
pjl_screen = PJL SCREEN = ON
ps_user_opts += [ fuzzy ]
ps_fuzzy = <</Fuzzy (\%s{fuzzy})>> setpagedevice
</pre>
</div>
<br>
<br>
<p>In the first example we define the <var class=
"LITERAL">screen</var> option. The <tt class=
"COMMAND">lpr -Zscreen</tt> option will cause the PJL
command <var class="LITERAL">PJL SCREEN = ON</var> to be
put into the output to the printer.</p>
<p>Similarly, <var class="LITERAL">lpr -Zfuzzy=5</var>
will cause the PostScript command <var class=
"LITERAL"><</Fuzzy (\%s{fuzzy})>>
setpagedevice</var> to be processed and the resulting
<var class="LITERAL"><</Fuzzy (5)>>
setpagedevice</var> command to be sent to the
printer.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2688">5.8. Initialization
and Setup Control</a></h2>
<p>Several options are used during the processing steps
discussed in <a href="#DETAILS">Filter Operation
Details</a> to control what setup is done for the
printer.</p>
<div class="VARIABLELIST">
<dl>
<dt>pjl_init = [ ... ]</dt>
<dd>
<p>If PJL is enabled on this printer, options in
this list are expanded and the resulting values are
sent to the printer. After this, the -Z options are
expanded and any options which are listed in the
<var class="SYMBOL">pjl_user_opts</var> are
processed.</p>
</dd>
<dt>ps_init = [ ... ]</dt>
<dd>
<p>If PostScript is enabled on this printer and a
PostScript file is being processed, then the
options in this list are expanded and the resulting
values are sent to the printer. After this, the -Z
options are expanded and any options which are
listed in the <var class=
"SYMBOL">ps_user_opts</var> are processed.</p>
</dd>
<dt>pcl_init = [ ... ]</dt>
<dd>
<p>If PCL is enabled on this printer and a PCL file
is being processed, then the options in this list
are expanded and the resulting values are sent to
the printer. After this, the -Z options are
expanded and any options which are listed in the
<var class="SYMBOL">pcl_user_opts</var> are
processed.</p>
</dd>
</dl>
</div>
<br>
<br>
<p>These initialization options are very useful in order
to set up information controlling the default format or
options for a print job. For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2709"></a>
<pre class="SCREEN">
pcl_init = [ normalpage ]
pcl_normalpage=[ letter crlf linewrap
portrait clearmargins fixed pitch=10 courier ]
</pre>
</div>
<br>
<br>
<p>When processing a PCL job, <var class=
"LITERAL">normalpage</var> is expanded by searching first
for <var class="LITERAL">normalpage</var> and then for
<var class="SYMBOL">pcl_normalpage</var>; this in turn
results in the expansion of the list of values. For
example, <var class="SYMBOL">pcl_crlf</var> is usually
defined as <var class=
"LITERAL">pcl_crlf=\033&k2G</var>, which is the PCL
command to translate a New Line (<var class=
"LITERAL">\015</var>) character as a Carriage Return/New
Line. The other entries have similar definitions that
produce the desired effects.</p>
</div>
</div>
<div class="CHAPTER">
<hr>
<h1><a name="AEN2718"></a>Chapter 6. Configuration
File</h1>
<p>This section will cover the <tt class=
"FILENAME">ifhp.conf</tt> file and the various options and
configuration methods used to control the operation of the
<b class="APPLICATION">ifhp</b> filter.</p>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2723">6.1. Configuration
File Entries</a></h2>
<p>The <b class="APPLICATION">ifhp</b> filter uses a
simple text based configuration file, usually <tt class=
"FILENAME">/usr/local/etc/ifhp.conf</tt> or <tt class=
"FILENAME">/etc/ifhp.conf</tt> to get a set of
configuration values which control its operation. The
following sample configuration file segment shows how
information is specified.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2729"></a>
<pre class="SCREEN">
# comment line - first non-blank character is a #
#---- DEFAULTS ----
# we first have the default section
# - a flag option whose value is 1
on_flag
# - a flag option whose value is 0
off_flag@
# - a flag option whose value is a string (single line)
# its value will be 'this is a string'
strval = this is a string
# - a flag option whose value is multiple lines
# each additional line starts with whitespace
# value is 'this\nis1\na\nstring'
longstrval = this
is\061
a
string
# - and a list that gets expanded -
# '[ this ] [ is a\nlist ]' -> [ this is a list ]
longlist = [ this ] [ is a
list ]
# we can extend a string.
# strval will now be 'this is a string added'
strval += added
# and we can expand a list
# '[ this ] [ is a\nlist ] [ more ]' -> [ this is a list more ]
longlist += [ more ]
# a printer specific section
# ---- PRINTER ----
[ hp hp4* ]
# this match model=hp, model=hp4, model=hp4x
# override the default
onflag@
include /usr/local/etc/ifhp.conf.local
[ entry1 ]
value
[ entry2 ]
tc=entry1
</pre>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2731">6.2.
Comments</a></h2>
<p>Comments are lines whose first non-whitespace
character is <var class="LITERAL">#</var>. Use <var
class="LITERAL">\#</var> if the first non-whitespace
character must be <span class="emphasis"><i class=
"EMPHASIS">#</i></span>.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2737">6.3. Option
Setting</a></h2>
<div class="INFORMALEXAMPLE">
<a name="AEN2740"></a>
<pre class="SCREEN">
Syntax Equivalent To
option option=1
option@ option=0
option=val
option=[ v1 v2 ... ] value contains all whitespace
option=[ v1 up to the next option entry
v2 blank lines and comments
v3 are not included
]
option=v1
v2
v3
</pre>
</div>
<br>
<br>
<p>If an option's default value is the empty string (<var
class="LITERAL">''</var>). The <b class=
"APPLICATION">ifhp</b> program uses the Perl language
convention that this value is equivalent to 0 when used
in a numerical context or the empty string when used in a
string context.</p>
<p>In general when a string is used in an integer context
it is converted to a the appropriate numerical type using
the standard Perl/C numerical representation and
conversion methods.</p>
<p>The <var class="LITERAL">flag</var> syntax sets the
value of <span class="emphasis"><i class=
"EMPHASIS">flag</i></span> to the string <var class=
"LITERAL">'1'</var>, that is, the string with a 1 value,
and <var class="LITERAL">flag@</var> sets it to <var
class="LITERAL">'0'</var>.</p>
<p>The <var class="LITERAL">option = value</var> syntax
sets the option value to a string. The string can extend
across multiple lines. A line starting with a space has
its value appended to the previous option with a new line
(<var class="LITERAL">\n</var>) separator.</p>
<p>As shown in the example, the <var class=
"LITERAL">+=</var> operator is used to append to a string
value. The <var class="LITERAL">[ option option
...]</var> syntax is used to specify that the value is a
list. Lists are used to specify a list of options which
can be flags or string values. Lists have the property of
<span class="emphasis"><i class="EMPHASIS">recursive
evaluation</i></span> which means that the individual
list items will be further processed during printing.
This is discussed later in detail.</p>
<p>The <var class="LITERAL">include</var> facility is
currently deprecated, and may not be implemented in
future releases. It will cause the specified file to be
read and processed at that point in the configuration
file.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2761">6.4. Option
Use</a></h2>
<p>Options and their values are used to control printer
operation. There are two types of options: those with a
predefined or <span class="emphasis"><i class=
"EMPHASIS">builtin</i></span> meaning to the <b class=
"APPLICATION">ifhp</b> filter and those which have their
values sent to the printer when appropriate. The builtin
options are listed and their use is explained in later
sections.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2766">6.5. List
Expansion</a></h2>
<p>The <b class="APPLICATION">ifhp</b> filter configures
a printer by sending the values of options to the printer
or performing built-in operations. An option can have a
flag, string, or list value.</p>
<p>A LIST value has the form <var class="LITERAL">[ v1 v2
... ]</var>. When a list value is to be sent to the
printer each of <var class="LITERAL">v1</var>, <span
class="emphasis"><i class="EMPHASIS">v2</i></span>, etc.
is expanded in turn and the corresponding string value or
builtin action is carried out. If the string value of a
term is itself a list, the list will be expanded in turn.
Recursive list evaluation will result in an error. The
following is an example of list expansion:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2774"></a>
<pre class="SCREEN">
t1=[ p1 p2 ]
p1=this is
p2=[ p3 p4 ]
p3=a
p4=test
</pre>
</div>
<br>
<br>
<p>The option <var class="LITERAL">t1</var> is expanded
by expanding <span class="emphasis"><i class=
"EMPHASIS">p1</i></span> and then <span class=
"emphasis"><i class="EMPHASIS">p2</i></span>; The
expansion of <var class="LITERAL">p1</var> produces <var
class="LITERAL">"this is"</var>, and <var class=
"LITERAL">p2</var> produces <var class="LITERAL">[p3
p4]</var>. This list is then expanded to produce <var
class="LITERAL">"a"</var> and <var class=
"LITERAL">"test"</var>.</p>
<p>Some LIST options are used in printer language
specific contexts and their values are processed
appropriately. For example, pjl_init=[...] specifies a
set of initialization operations for PJL printers, and
pcl_init=[...] is used to specify the initialization
needed for PCL printing. The expansion of the LIST
entries is done in the language specific context. For PJL
this requires that the output be well formed PJL
commands, and for PCL that all whitespace be removed.</p>
<p>The context dependent expansion is required because
sometimes it is necessary to do operations both using PJL
and PCL or PJL and PS combinations to ensure correct
printer operation. During expansion the language name and
an underscore is prefixed to the list entry name and this
is used as the option name during expansion. If the
prefixed name is not found then the unprefixed name will
be used. For example, suppose that we have:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2788"></a>
<pre class="SCREEN">
pjl_init=[ initstr test ]
pcl_init=[ initstr ]
pjl_initstr=@PJL ECHO YES
pcl_initstr=\033(*0V
test=DONE
</pre>
</div>
<br>
<br>
<p>When PJL initialization is being done and we want
string values for the <var class="SYMBOL">pjl_init</var>
LIST, we expand <var class="LITERAL">initstr</var> and
<var class="LITERAL">test</var> in the <var class=
"SYMBOL">pjl_</var> context. First a defined <var class=
"SYMBOL">pjl_initstr</var> value will be looked for and
then a defined <var class="LITERAL">initstr</var> value.
Since there is a value of <var class=
"SYMBOL">pjl_initstr</var> it will be used.</p>
<p>Similarly we will check for <var class=
"SYMBOL">pjl_test</var> and <var class=
"LITERAL">test</var> values. Since <var class=
"SYMBOL">pjl_test</var> does not have a defined value the
<var class="LITERAL">test</var> value <acronym class=
"ACRONYM">DONE</acronym> will be used.</p>
<p>When PCL initialization is being done and we want
string values for the <var class="SYMBOL">pcl_init</var>
LIST, then we expand <var class="LITERAL">initstr</var>
in a similar way, resulting in <var class=
"LITERAL">\033(*0V</var>.</p>
<p>We can use the list entry <var class="LITERAL">[
option=value ]</var> to temporarily specify the value of
a variable which is then used during language specific
expansion. For example, suppose that we have the
following set of definitions:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2810"></a>
<pre class="SCREEN">
pjl_init=[ initstr=testing ]
pjl_initstr=@PJL INIT=\%s%lcub;initstr%rcub;XQ
</pre>
</div>
<br>
<br>
<p>As discussed in the next section, the <var class=
"LITERAL">\%s%lcub;initstr%rcub;</var> will cause the
value for the <span class="emphasis"><i class=
"EMPHASIS">initstr</i></span> value to be substituted
into the <var class="SYMBOL">pjl_initstr</var> string.
How this is done is discussed in the section on <a href=
"#STRINGESCAPE">String Escape Sequences</a>.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="STRINGESCAPE">6.6. String
Escape Sequences</a></h2>
<p>String values have a syntax similar to PERL or C. The
<var class="LITERAL">\</var> (escape) character indicates
the start of an escape sequence string. This has the
syntax:</p>
<div class="VARIABLELIST">
<dl>
<dt>Standard Character Replacement</dt>
<dd>
<p><var class="LITERAL">\f</var>, <var class=
"LITERAL">\r</var>, <var class="LITERAL">\n</var>,
and <var class="LITERAL">\t</var> are replaced in
turn by the ASCII characters FF, CR, NL, and HT
whose values are 014, 015, 012, and 011
respectively.</p>
</dd>
<dt>Octal Character Replacement</dt>
<dd>
<p><var class="LITERAL">\nnn</var>, where nnn is 3
octal digits, is replaced by the corresponding
character with the specified value.</p>
</dd>
<dt>Option Value Replacement</dt>
<dd>
<p><var class="LITERAL">\%format{option} OR
\%format[option]</var></p>
<p>The value of the option will be determined and
replaced by a formatted string. The option value is
determined by the following algorithm.</p>
<ol type="1">
<li>
<p>When expanding a list value, the <var class=
"LITERAL">option=word</var> will push the <var
class="LITERAL">option=word</var> combination
onto an evaluation stack, and then the <var
class="LITERAL">option</var> value is expanded
in the current language context.</p>
</li>
<li>
<p>When starting a search for <var class=
"LITERAL">{option}</var> in a language context
<var class="SYMBOL">lang_</var>, the stack of
list values is searched in oldest to newest
order for a match for <var class=
"SYMBOL">lang_option</var> and then for <var
class="LITERAL">option</var>. The first one
found is used as the option value.</p>
</li>
<li>
<p>After searching the evaluation stack for
<var class="LITERAL">{option}</var> and finding
no match, the <var class="OPTION">-Z</var>
command line option values are searched for a
matching entry.</p>
</li>
<li>
<p>If none is found, then the <var class=
"OPTION">-T</var> command line option values
and next the printer configuration will then be
searched for <var class=
"SYMBOL">lang_option</var> and then for <var
class="LITERAL">option</var>. If no match is
found, then the empty string will be the result
if a string is wanted, or the value 0 if a
number is wanted.</p>
</li>
<li>
<p>If the result of this lookup is a list, then
the list will be expanded in turn, and the
concatenating values of the expansion will be
used.</p>
</li>
<li>
<p>When starting a search for <var class=
"LITERAL">[option]</var> the <var class=
"OPTION">-T</var> command line options will be
searched first and next the printer
configuration will be searched for <var class=
"SYMBOL">lang_option</var> and then for <var
class="LITERAL">option</var>. If no match is
found, then the empty string will be the result
if a string is wanted, or the value 0 if a
number is wanted.</p>
</li>
<li>
<p>***help*** If the result of this lookup is a
list If no match was found, then the search
rules for <var class="LITERAL">{option}</var>
will be used, and the list expansion will be
done as described above. If no match was found
a null (empty string) value will be used.</p>
</li>
</ol>
<br>
<br>
</dd>
<dt>Option Value Format</dt>
<dd>
<div class="INFORMALEXAMPLE">
<a name="AEN2877"></a>
<pre class="SCREEN">
%[-][0][length[.precision]][format]
%d{1} => '1' %s{1} => '1'
%3d{1} => ' 1' %3s{1} => ' 1'
%03d{1} => '0001' %-3s{1} => '1 '
%4.2f{1} => '1.00'
Special Case Conversion:
%s{ThisWord} => 'ThisWord'
%U{ThisWord} => 'THISWORD'
%M{ThisWord} => 'Thisword'
%L{ThisWord} => 'thisword'
</pre>
</div>
The format specifies how the value is to appear,
and is similar to the printf format usage.<br>
<br>
<p>Depending on the format type, a value will be
converted and used appropriately. The empty string
or null value (<var class="LITERAL">''</var>) will
be treated as a <span class="emphasis"><i class=
"EMPHASIS">'0'</i></span> value when used in an
numeric context.</p>
<p>The default format is %d, ie, \%{val} would be
\%d{val}. The numerical formats supported are: %d,
%o, %x, %X, %e, %f, and %g; The %s format use the
string value of the result.</p>
<p>The <var class="LITERAL">U</var>, <var class=
"LITERAL">M</var>, and <var class="LITERAL">L</var>
have the same behavior as the <var class=
"LITERAL">s</var> format, but the string value is
then uppercased, lowercased and the first letter
uppercased, and lowercased respectively. This
allows various programs that have fussy requirement
about the case of their options to be handled
correctly.</p>
</dd>
</dl>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2888">6.7. Language Context
and Value Expansion</a></h2>
<p>The <b class="APPLICATION">ifhp</b> filter sends
initialization and configuration commands to the printer.
Depending on the type of language of a print file (i.e. -
PostScript or PCL), different command formats would need
to be used to implement different options. For example,
to implement a <span class="emphasis"><i class=
"EMPHASIS">landscape</i></span> option for a PJL aware
printer you would need to send the PJL command <var
class="LITERAL">@PJL SET ORIENTATION=LANDSCAPE</var>. For
a PostScript printer you would need to send a very
strange string which would depend on the actual printer
mode.</p>
<p>Our language context also includes various checks for
language specific dependencies. This section refers to
material that is discussed in depth in later sections of
this document, and on first reading may be a little
confusing. However, if you are not aware of some of these
restrictions then much of the information in the
configuration files may be very confusing.</p>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="AEN2895">6.7.1. PJL
Language</a></h3>
<p>A PJL command has the form <var class="LITERAL">@PJL
OPCODE ...</var>, and PJL commands must be sent as a
block before any other commands. In order to assist
with this, the <b class="APPLICATION">ifhp</b> filter
provides the following assistance. When expanding a
list value, each list entry is expected to form a well
formatted PJL command.</p>
<ol type="1">
<li>
<p>Before sending any PJL command to the printer,
the PJL Universal Exit Command (<var class=
"LITERAL">\033%-12345X</var>) string is sent to the
printer. This is automatically done if <var class=
"LITERAL">pjl</var> is enabled for the printer.</p>
</li>
<li>
<p>The list item is expanded, and all value
substitutions are done. Leading and trailing
whitespace is removed, all characters are converted
to uppercase, and a new line (<var class=
"LITERAL">\n</var>) value is appended to the
command.</p>
</li>
<li>
<p>Because not all printers support all PJL
commands, the <b class="APPLICATION">ifhp</b>
filter performs uses the <var class=
"SYMBOL">pjl_only</var> and <var class=
"SYMBOL">pjl_except</var> configuration lists to
ensure that the options are allowed by the printer.
The OPCODE must appear in the <var class=
"SYMBOL">pjl_only</var> list and not in the <var
class="SYMBOL">pjl_except</var> list. For
example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2915"></a>
<pre class="SCREEN">
pjl_only = [ JOB SET STATUS ]
pjl_except = [ STATUS ]
</pre>
</div>
<br>
<br>
<p>The <var class="SYMBOL">pjl_only</var> indicates
that the printer supports the PJL JOB, SET, and
STATUS commands, but the <var class=
"SYMBOL">pjl_except</var> list removes the STATUS
from this list. This means that only the JOB and
SET commands will be allowed.</p>
</li>
<li>
<p>If the command is a <acronym class=
"ACRONYM">SET</acronym> command, then the PJL
variable must appear in the <var class=
"SYMBOL">pjl_vars_set</var> list and not in the
<var class="SYMBOL">pjl_vars_except</var> list.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2925"></a>
<pre class="SCREEN">
pjl_vars_set = [ PAPER SIZE ORIENTATION ]
pjl_vars_except = [ PAPER ]
@PJL SET SIZE=A4
@PJL SET PAPER=LETTER
</pre>
</div>
<br>
<br>
<p>In the above example, the <var class=
"LITERAL">SIZE=A4</var> command would be allowed
and sent while the <var class=
"LITERAL">PAPER=LETTER</var> command would be
rejected and not sent.</p>
</li>
</ol>
<br>
<br>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="AEN2930">6.7.2. PCL
Language</a></h3>
<p>When sending PCL initialization strings to a
printer, it is essential to send nothing that could
cause a printable character to be sent before the
actual file contents. Such output could cause the
location and positioning of text to be altered in
unexpected ways. To avoid this, the following steps are
taken when expanding a list in a PCL language
context.</p>
<ol type="1">
<li>
<p>Before any PCL string is sent to the printer,
the PCL End of Job (<var class=
"LITERAL">\033E</var>) string is sent to the
printer.</p>
</li>
<li>
<p>All whitespace (blanks, tabs, etc) are removed
from the string value.</p>
</li>
<li>
<p>Next, all escaped values are substituted. At
this point you can <span class="emphasis"><i class=
"EMPHASIS">force</i></span> printable strings
containing whitespace into the output by using the
<var class="LITERAL">\nnn</var> escape
mechanism.</p>
</li>
<li>
<p>All list values are concatenated and then sent
to the printer.</p>
</li>
</ol>
<br>
<br>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="AEN2945">6.7.3. PostScript
Language</a></h3>
<p>The PostScript language processing is very minimal,
as there are few problems sending PostScript to a
printer.</p>
<ol type="1">
<li>
<p>Before sending any PostScript initialization
strings, the PostScript End of Job indicator (<var
class="LITERAL">\004</var> or Control-D) is
sent.</p>
</li>
<li>
<p>Strings are then expanded and the escape
sequences are substituted.</p>
</li>
<li>
<p>Individual strings have a newline (<var class=
"LITERAL">\n</var>) appended to them before being
sent to the printer.</p>
</li>
</ol>
<br>
<br>
</div>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2957">6.8. Printer
Entries</a></h2>
<p>The <tt class="FILENAME">ifhp.conf</tt> file is
divided into printer entries by <var class="LITERAL">[
pattern pattern ...]</var> lines. Each pattern is glob
matched against the <var class="LITERAL">model</var>
option value, and if the match is successful then the
options on the following lines until the next printer
entry header are appended to the specific printer
configuration entry.</p>
<p>By convention, each configuration file is assumed to
start with the header <var class="LITERAL">[ default
]</var>, and the initial set of lines are used to set
default values for the various <b class=
"APPLICATION">ifhp</b> options.</p>
<p>The algorithm for scanning the configuration files
first sets the <var class="LITERAL">model</var> value to
<span class="emphasis"><i class=
"EMPHASIS">default</i></span>, and extracts the default
information. It then sets the <var class=
"LITERAL">model</var> value to the user specified value,
and rescans the configuration file information.</p>
<p>If users need to add or modify the <tt class=
"FILENAME">ifhp.conf</tt> file, then they should add
their entries to the end of the file, and override any
default options by specific values in their new entry. To
aid with system configuration and maintenance, the
distributed <tt class="FILENAME">ifhp.conf</tt> file has
the following text at the end of the file:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN2973"></a>
<pre class="SCREEN">
##### This is the end of the standard ifhp.conf file.
##### Add your local files after this
##### If you want to override some entries, simply change the names to
##### something different, i.e. hp4 hp4.old
##### Here is a script to do this and then append your local file to the
##### end of the ifhp.conf file:
#####
##### #!/bin/sh
##### for i in $* ; do
##### perl -spi.bak -e 's/ $i / $i.orig /g' ifhp.conf
##### done
#####
##### sed -n -e '1,/XXX END XXX/p' ifhp.conf >ifhp.conf.new
##### sed '1,/XXX END XXX/d' ifhp.old >> ifhp.conf.new
#####
##### You can probably improve on this.
#####
#### XXX END XXX #####
# user adds new default values here for all printer entries
[ default ]
# set default value
pcl_option= \033test
[ mypcl_printer ]
# override default value
pcl_option=
</pre>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2975">6.9. Include
Facility</a></h2>
<p>The <var class="LITERAL">include filename</var>
facility is similar to the standard compiler file
inclusion facility. The specified file or list of files
separated by commas or whitespace will be substituted for
the indicated line.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2979">6.10. tc Entry
Inclusion Facility</a></h2>
<p>The <var class="LITERAL">tc=entry</var> facilty is
similar to the printcap <var class="LITERAL">tc</var>
facility used in the <b class="APPLICATION">LPRng</b>
software other places. The specified entry or list of
entries separated by commas or whitespace will be
substituted for the indicated line.</p>
</div>
</div>
<div class="CHAPTER">
<hr>
<h1><a name="DETAILS"></a>Chapter 7. Filter Operation
Details </h1>
<p>The <b class="APPLICATION">ifhp</b> filter operates by
first reading a configuration file to determine the type of
printer it is working with, and then proceeds to carry out
operations requested by the values of option variables
passed on the command line or found in the configuration
files. In normal operation, input is read from <acronym
class="ACRONYM">STDIN</acronym> (file descriptor 0) and
results written to <acronym class=
"ACRONYM">STDOUT</acronym> (file descriptor 1). Status
reports are written to a status file or optionally to
<acronym class="ACRONYM">STDERR</acronym> (file descriptor
2), together with any error messages or diagnostics.</p>
<p>In addition to normal operation the filter can run in
the <acronym class="ACRONYM">OF</acronym> mode and act as a
printer initializer and job terminator. This is discussed
in detail in the <b class="APPLICATION">LPRng</b>
documentation. When in the OF mode the two character
sequence <var class="LITERAL">"\031\001"</var> to the
filter. will cause the filter to suspend itself by sending
itself a <acronym class="ACRONYM">SIGSUSP</acronym> signal.
The print spooler will detect this and then send job files
to the same output device. After the files have been
transferred the the filter will be restarted with a SIGCONT
signal.</p>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN2997">7.1. Filter
Pseudo-Code</a></h2>
<p>The details of the filter operations are described in
the following <span class="emphasis"><i class=
"EMPHASIS">pseudo-code</i></span>. The sections marked
with <var class="LITERAL">###</var> are discussed later
in this document in detail.</p>
<p><tt class="FILENAME">///</tt> See: <a href=
"#SETUP">Options, Initialization and Setup</a></p>
<div class="INFORMALEXAMPLE">
<a name="AEN3005"></a>
<pre class="SCREEN">
###+++ Initialization and Setup
// get ifhp information from PRINTCAP_ENTRY environment variable
if( PRINTCAP_ENTRY environment variable has a value ){
split printcap information into printcap fields
if( :ifhp=options,options is present in printcap ){
split the options list and place in the Toptions list
}
}
Add the -T command line options to the Toptions list
Add the -Z command line options to the Zoptions list
foreach option in -Toptions do
if( option = "debug=level" ){
set Debuglevel = level;
}
if( option = "trace" ){
output error and trace on STDERR
}
if( option = "config=pathlist" ){
set configuration pathlist = pathlist;
}
if( option = "model=name" and model not set ){
set model = name;
}
}
Read the configuration files from the config file list
Prepend each file with a [ default ] header
Scan the configuration files for [ default ] entries;
later entry values will override earlier ones.
Repeat the scan, but this time search for [ model ] entries
matching the specified model.
Put the command line options and -T options into configuration
information, effectively overriding the information from the
configuration files.
if( appsocket ) {
Get the :lp=... entry from the PRINTCAP_ENTRY environment variable
if( no information ) {
use the getpeername() to get the TCP/IP address of the current
connection.
}
if( no informtion AND no dev=... parameter ) {
error!
}
close connection to printer and set -Tdev= device or IP Address
}
// open a connection to the printer if required
// usually only done when appsocket protocol is used
if( device specified using -Tdev=device ){
close(1)
// if device is host%port, we open TCP/IP connection
fd = open(device);
// Note - status opens RW
// status@ opens WO
dup fd to 1; close fd;
}
###---
</pre>
</div>
<tt class="FILENAME">///</tt> See: <a href=
"#SYNCPAGE">Synchronization and Pagecount</a>
<div class="INFORMALEXAMPLE">
<a name="AEN3009"></a>
<pre class="SCREEN">
###+++ Synchronization and Pagecount
if( status returned by printer and sync requested ){
do{
send command and wait for timeout;
} while( no response );
if( appsocket ){
close and reopen TCP/IP connection;
}
}
if( status and pagecount requested ){
// pagecount has the form pagecount@ (none),
// pagecount=ps, pagecount=pjl, ...
if( pagecount=language has value ) do {
if( pagecount TRUE ){
set pagecount= pjl or ps depending on availability
}
if( pagecount = pjl and PJL INFO available ){
send PJL INFO PAGECOUNT command to printer
} else if( pagecount = ps ){
send PS program to printer
} else {
terminate with error;
}
} while( no pagecount response );
if( appsocket ){
close and reopen TCP/IP connection;
}
}
###---
</pre>
</div>
<tt class="FILENAME">///</tt> See: <a href="#PJLINIT">PJL
Initialization</a>
<div class="INFORMALEXAMPLE">
<a name="AEN3013"></a>
<pre class="SCREEN">
### PJL INITIALIZATION
if( PJL enabled ){
language = "pjl_"
foreach option in pjl_init=[...] {
expand the option using the language value
#+++ PJL OPTION ACTIONS +++
if( option in pjl_vars_set=[ ... ]
and option not in pjl_vars_except
expand "@PJL SET OPTION=\%{option}"
output = expanded string value
} else {
if( option value is a string ){
output = expanded string value;
}
}
// output has the form @PJL COMMAND ....
if( COMMAND is in pjl_only=[ ... ]
and not in pjl_except=[ ... ] ){
send output to printer
}
#--- end PJL OPTION ACTIONS
}
if( !OF_mode ){
foreach option in -Toption=value {
if( option in pjl_user_opts ){
#+++ USER PJL OPTIONS
// join 'pjl_' and the option name
expand 'pjl_' . option
// perform PJL actions as above
#+++ PJL OPTION ACTIONS +++
....
#-- PJL OPTION ACTIONS +++
#--- USER PJL OPTIONS
}
}
foreach option in -Zoption=value {
if( option in pjl_user_opts ){
// perform USER PJL actions as above
#+++ USER PJL OPTIONS
#--- USER PJL OPTIONS
}
}
}
}
###--- PJL INITIALIZATION
</pre>
</div>
<tt class="FILENAME">///</tt> See: <a href=
"#CONVERSION">File Conversion Support</a>
<div class="INFORMALEXAMPLE">
<a name="AEN3017"></a>
<pre class="SCREEN">
// language is set to the type of job language
// - PS, PCL, TEXT, RAW, UNKNOWN
// the first part of the job file is read and the filter takes
// a (wimpy) guess at the job file based only on the first couple
// of characters; language is be PJL, PS, or TEXT, or RAW
// This is the same algorithm as the UNIX FILE utility
language = default_language (from configuration);
if( command line -c (binary) option present ){
language = RAW;
} else if( -Zlanguage=xxx option present ){
language=xxx
} else if( forceconversion set ){
use UNIX file utility to get file type
} else if( file is PS file ){
language=PS
if( file starts with PS EOJ (CTRL-D)
and ps_eoj_at_start is clear ){
remove the PS EOJ
} else {
send a PS EOJ first
}
} else if( file is PCL file ){
language=PCL
if( file starts with PCL EOJ (ESC E)
and pcl_eoj_at_start is clear ){
remove the PCL EOJ
}
}
if( file conversion table specified then ){
look up file type in conversion table;
if( conversion program specified ){
run input through conversion program
}
set file type to output type
}
if( language = TEXT and PCL allowed ){
language = PCL;
}
if( language not recognized by printer ){
exit with error;
}
if( PJL ENTER supported ){
use PJL ENTER command to select language;
send nullpad NULLS to force full buffer condition
}
</pre>
</div>
<tt class="FILENAME">///</tt> See: <a href=
"#LANGUAGEINIT">Language Specific Initialization</a> <a
name="PCL-USER-OPTS"></a> <a name="PS-USER-OPTS"></a>
<div class="INFORMALEXAMPLE">
<a name="AEN3023"></a>
<pre class="SCREEN">
// LANGUAGE SPECIFIC INITIALIZATIONS
if( language = PCL ){
foreach option in pcl_init {
###+++ expansion
do expansion similar to PJL OPTION actions
using "pcl_" prefix for option lookup;
###---
}
if( not in OF_MODE ){
foreach option in -Toption do {
if( option in pcl_user_vars=[ ... ] ){
###+++ expansion as above
###---
}
foreach option in -Zoption do {
if( option in pcl_user_opts=[ ... ] ){
###+++ expansion as above
###---
}
}
remove whitespace and expand string results;
} else if( language = PS ){
###+++ language specific actions as above,
using the ps_ prefix for lookup
allow only user option in the ps_user_opts list
expand string results but do not remove whitespace
}
</pre>
</div>
<tt class="FILENAME">///</tt> See: <a href=
"#FILETRANSFER">File Transfer and Error Status
Monitoring</a>
<div class="INFORMALEXAMPLE">
<a name="AEN3027"></a>
<pre class="SCREEN">
Transfer job to printer, reading error and other information
back from the printer if enabled
if( language = PCL ){
send PCL End of Job
} else if( language = PS ){
send PS End of Job
}
// job termination
###+++ Synchronization and Pagecount as above
finished = 0
while( waitend and not finished ){
// timeouts and retries are done here
if( time taken is too long ){
give up and report an error
}
if( waitend with PJL ){
wait for end of job using UINFO;
} else if( waitend with PS ){
send PostScript echo program to printer
if end_ctrl_t then add ^T
}
wait for response
if( response has end of job indication ) {
finished = 1;
}
}
if( pagecount ){
if( appsocket ){
close and reopen connection;
}
get pagecount using previously described algorithm
}
###---
exit
</pre>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="SETUP">7.2. Options,
Initialization and Setup</a></h2>
<p>During the setup step, the <b class=
"APPLICATION">ifhp</b> system will extract command line
options and scan configuration files for printer entries.
These operations are covered in detail in other
sections.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="LANGUAGES">7.3. Languages
Supported- pjl, pcl, ps, and text</a></h2>
<ul>
<li>
<p><var class="LITERAL">pjl</var> FLAG <span class=
"emphasis"><i class="EMPHASIS">PJL
Supported</i></span></p>
</li>
<li>
<p><var class="LITERAL">pcl</var> FLAG <span class=
"emphasis"><i class="EMPHASIS">PCL
Supported</i></span></p>
</li>
<li>
<p><var class="LITERAL">ps</var> FLAG <span class=
"emphasis"><i class="EMPHASIS">PostScript
Supported</i></span></p>
</li>
<li>
<p><var class="LITERAL">text</var> FLAG <span class=
"emphasis"><i class="EMPHASIS">Text
Supported</i></span></p>
</li>
</ul>
<p>These flags set the languages that are recognized or
processed by the filter.</p>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="PJL-JOB">7.3.1. pjl_job
FLAG</a></h3>
<ul>
<li>
<p><var class="LITERAL">pjl_job</var> FLAG <span
class="emphasis"><i class="EMPHASIS">Send PJL Job
and EOJ</i></span></p>
</li>
</ul>
<p>If PJL is enabled and the <var class=
"LITERAL">pjl_job</var> flag is SET a PJL JOB and PJL
EOJ command will be generated and sent to the printer
at the job start and end respectively. The <var class=
"LITERAL">JOB</var> command has the form:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3063"></a>
<pre class="SCREEN">
@PJL JOB NAME = "..." [ START = nnn ] [ END = mmm ]
</pre>
</div>
The START and END values can be specified by <var
class="LITERAL">-Zstartpage=nnn</var> and <var class=
"LITERAL">-Zendpage=mmm</var> command line options. The
EOJ command has must match the JOB command.
<div class="INFORMALEXAMPLE">
<a name="AEN3067"></a>
<pre class="SCREEN">
@PJL EOJ NAME = "..." [ START = nnn ] [ END = nnn ]
</pre>
</div>
<br>
<br>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="PJL-ENTER">7.3.2. pjl_enter
FLAG</a></h3>
<ul>
<li>
<p><var class="LITERAL">pjl_enter</var> FLAG <span
class="emphasis"><i class="EMPHASIS">Send PJL
ENTER</i></span></p>
</li>
</ul>
<p>If PJL is enabled and the <var class=
"LITERAL">pjl_enter</var> flag is SET, a PJL ENTER
LANGUAGE = xx command will be generated when PCL or PS
files are sent to the printer.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3078"></a>
<pre class="SCREEN">
@PJL ENTER LANGUAGE = PCL
@PJL ENTER LANGUAGE = POSTSCRIPT
</pre>
</div>
<br>
<br>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="REMOVE-PJL-AT-START">7.3.3.
remove_pjl_at_start FLAG</a></h3>
<ul>
<li>
<p><var class="LITERAL">remove_pjl_at_start</var>
FLAG <span class="emphasis"><i class=
"EMPHASIS">Remove PJL code from begining of
job</i></span></p>
</li>
</ul>
<p>Some printer drivers will prepend PJL code to the
begining of print jobs. If the <var class=
"LITERAL">remove_pjl_at_start</var> flag is SET, <b
class="APPLICATION">ifhp</b> will remove this PJL
code.</p>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="NULLPAD">7.3.4. nullpad
STRING</a></h3>
<ul>
<li>
<p><var class="LITERAL">nullpad=</var> ephasis/null
character count/</p>
</li>
</ul>
<p>Some older model HP printers require receiving a
large number of NULL (0) characters to force commands
in the input buffer to be read. This can be done using
the <var class="LITERAL">nullpad</var> option. In
practice, this has turned out to be largely irrelevant
as most newer printers and network interface printers
do not have this problem.</p>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="PJL-CONSOLE">7.3.5.
pjl_console FLAG</a></h3>
<ul>
<li>
<p><var class="LITERAL">pjl_console</var> FLAG
<span class="emphasis"><i class="EMPHASIS">printer
console messages</i></span></p>
</li>
</ul>
<p>When this flag is set and PJL is available and the
PJL <acronym class="ACRONYM">RDYMSG</acronym> command
is supported, then a short message will be put on the
console.</p>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="REMOVE-CTRL">7.3.6.
remove_ctrl STRING</a></h3>
<ul>
<li>
<p><var class="LITERAL">remove_ctrl=</var><span
class="emphasis"><i class="EMPHASIS">remove control
characters</i></span></p>
</li>
</ul>
<p>The <var class="SYMBOL">remove_ctrl</var> string
option species a list of (control) characters that will
be removed from PostScript jobs. This solves the
problem of jobs with embedded Control-T or Control-C
characters causing abnormal printer operation. For
example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3116"></a>
<pre class="SCREEN">
remove_ctrl=CT
</pre>
</div>
would cause Control-C and Control-T characters to be
removed.<br>
<br>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="TBCP">7.3.7. tbcp
FLAG</a></h3>
<ul>
<li>
<p><var class="LITERAL">tbcp</var> FLAG <span
class="emphasis"><i class="EMPHASIS">Use TBCP
protocol</i></span></p>
</li>
</ul>
<p>The <var class="LITERAL">tbcp</var> flag can be
specified as a user option as well as a configuration
file option. If the file type is PostScript and this
flag is set then the file is transferred using the
Transparent Binary Communication Protocol. (See the
Adobe PostScript Language Reference Manual for details
on the protocol.)</p>
<p>At the start of the PostScript job, the sequence
<var class="LITERAL">\001</var> <span class=
"emphasis"><i class="EMPHASIS">M</i></span> is sent.
Afterwards, all control characters in the set <var
class="LITERAL">0x01, 0x03, 0x04, 0x05, 0x11, 0x13,
0x14, 0x1C,</var> are replaced by the two character
sequence <var class="LITERAL">\001</var> <var class=
"LITERAL">X+'@'</var> or <var class=
"LITERAL">X+'\100'</var> or is sent. For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3134"></a>
<pre class="SCREEN">
C\001\003 -> \001\115\103\001\101\001\103 or \001MC\001A\001C
</pre>
</div>
<br>
<br>
</div>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="SYNCPAGE">7.4. Synchronization
and Pagecounts</a></h2>
<ul>
<li>
<p><var class="LITERAL">accounting=</var> <span
class="emphasis"><i class="EMPHASIS">accounting
program</i></span></p>
</li>
<li>
<p><var class="LITERAL">accounting_info=</var> <span
class="emphasis"><i class="EMPHASIS">accounting
information</i></span></p>
</li>
<li>
<p><var class="LITERAL">pagecount</var> FLAG or
Option <span class="emphasis"><i class=
"EMPHASIS">pagecounter available</i></span></p>
</li>
<li>
<p><var class="LITERAL">pagecount_interval=</var>
<span class="emphasis"><i class="EMPHASIS">get
pagecounter interval</i></span></p>
</li>
<li>
<p><var class="LITERAL">pagecount_timeout=</var>
<span class="emphasis"><i class="EMPHASIS">get
pagecounter timeout</i></span></p>
</li>
<li>
<p><var class="LITERAL">pagecount_start=</var> <span
class="emphasis"><i class="EMPHASIS">get pagecounter
at job start</i></span></p>
</li>
<li>
<p><var class="LITERAL">pagecount_end=</var> <span
class="emphasis"><i class="EMPHASIS">get pagecounter
at job end</i></span></p>
</li>
<li>
<p><var class="LITERAL">pagecount_ps_code=</var>
<span class="emphasis"><i class="EMPHASIS">PostScript
to get pagecounter</i></span></p>
</li>
<li>
<p><var class="LITERAL">sync</var> FLAG or Option
<span class="emphasis"><i class="EMPHASIS">sync
required</i></span></p>
</li>
<li>
<p><var class="LITERAL">sync_interval=</var> <span
class="emphasis"><i class="EMPHASIS">do sync at
interval</i></span></p>
</li>
<li>
<p><var class="LITERAL">sync_timeout=</var> <span
class="emphasis"><i class="EMPHASIS">sync
timeout</i></span></p>
</li>
<li>
<p><var class="LITERAL">wait_for_banner</var> FLAG
<span class="emphasis"><i class="EMPHASIS">wait for
banner page</i></span></p>
</li>
</ul>
<p>Many printers are able to provide status information
back to the filter. It is assumed that in these
circumstances file descriptor 1 (FD1) is <span class=
"emphasis"><i class="EMPHASIS">bidirectional</i></span>
and status information can be read from it. When the <var
class="LITERAL">status</var> option is TRUE, FD1 is
readable and is a device or communications socket, then
the filter assumes that it can read FD1.</p>
<p>Synchronization is usually done in order to ensure
that a previously spooled job or printer action has
completed correctly, and the printer is ready to accept a
new job. It is usually carried out by sending a request
to the printer to echo a string back to the filter.
Clearly, if the printer cannot provide status or echo
values back, then synchronization is impossible.</p>
<p>The value of the <var class="LITERAL">sync</var>
option determines if a PJL ECHO command or simple
PostScript program is used. The PostScript program has
the form:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3193"></a>
<pre class="SCREEN">
\004%!PS-Adobe-2.0
( %%[ echo: <acronym class=
"ACRONYM">TODSTR</acronym> ]%% ) print () = flush
\004
</pre>
</div>
where <acronym class="ACRONYM">TODSTR</acronym> is
replaced with the current Time of Day.<br>
<br>
<p>To control obtaining synchronization, the <var class=
"LITERAL">sync_interval=nnn</var> and <var class=
"LITERAL">sync_timeout=nnn</var> options are used. The
PJL or PS command is repeated at <var class=
"LITERAL">sync_interval=nnn</var> second intervals; if
nnn is 0, then it is sent only once. If synchronization
is not obtained within <var class=
"LITERAL">sync_timeout=nnn</var> seconds, then the filter
exits with an error status. A 0 value or <var class=
"LITERAL">sync_timeout@</var> disables timeouts.</p>
<p>When the <b class="APPLICATION">ifhp</b> filter is
operating in OF mode and the <var class=
"LITERAL">wait_for_banner</var> option is true, the
filter will wait until it determines that the banner page
has been completely printed before carrying out other
filter functions.</p>
<p>Pagecounts are used to do accounting and report the
number of pages used for a job. Most printers have a
hardware based pagecounter mechanism whose value can be
read by the appropriate PJL command or PostScript
program. For example, if the PJL INFO command</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3207"></a>
<pre class="SCREEN">
@PJL INFO PAGECOUNT
</pre>
</div>
is supported by a printer, the printer will return a
status message containing the current pagecounter value.
Printers that support PostScript may also be able to
access the pagecounter value using a PostScript program.
The exact details of the PostScript program vary from
vendor to vendor and the <var class=
"LITERAL">pagecount_ps_code=...</var> option specifies
the PostScript program to use. For example:
<div class="INFORMALEXAMPLE">
<a name="AEN3210"></a>
<pre class="SCREEN">
pagecount_ps_code=
/p {print} def ( %%[ pagecount: ) p
statusdict begin pagecount end 20 string cvs p
( ]%% ) p () = flush
</pre>
</div>
<br>
<br>
<p>The <b class="APPLICATION">lpd</b> print server and
the <b class="APPLICATION">ifhp</b> filter must act in
coordination to do reliable pagecounting. The following
options are used by the <b class="APPLICATION">ifhp</b>
filter to assist with this:</p>
<div class="INFORMALTABLE">
<a name="PAGECOUNTOPTIONS"></a>
<table border="1" frame="border" rules="all" class=
"CALSTABLE">
<col>
<col>
<thead>
<tr>
<th>Option</th>
<th>Purpose</th>
</tr>
</thead>
<tbody>
<tr>
<td><var class=
"LITERAL">accounting=</var>.../</td>
<td>accounting program</td>
</tr>
<tr>
<td><var class=
"LITERAL">accounting_info=AnPR</var></td>
<td>accounting information</td>
</tr>
<tr>
<td><var class="LITERAL">pagecount@</var></td>
<td>do not get pagecounter value</td>
</tr>
<tr>
<td><var class="LITERAL">pagecount</var></td>
<td>get pagecounter using either PJL or
PostScript if available on the printer
(default)</td>
</tr>
<tr>
<td><var class="LITERAL">pagecount=pjl</var></td>
<td>get pagecounter using PJL</td>
</tr>
<tr>
<td><var class="LITERAL">pagecount=ps</var></td>
<td>get pagecounter using PostScript</td>
</tr>
<tr>
<td><var class=
"LITERAL">pagecount_start</var></td>
<td>get pagecounter at job start (default)</td>
</tr>
<tr>
<td><var class="LITERAL">pagecount_end</var></td>
<td>get pagecounter at job end (default)</td>
</tr>
<tr>
<td><var class=
"LITERAL">pagecount_poll=N</var></td>
<td>if nonzero, poll printer and conclude
pagecounter value is nonzero when identical N
times (default 1)</td>
</tr>
<tr>
<td><var class=
"LITERAL">pagecount_interval</var></td>
<td>if polling more than once, then leave this
interval (in seconds) between polls.</td>
</tr>
<tr>
<td><var class=
"LITERAL">of_options=...</var></td>
<td>Use these option values when running in OF
Mode</td>
</tr>
</tbody>
</table>
</div>
<br>
<br>
<p>The following options are used in the <b class=
"APPLICATION">LPRng</b> printcap entry to assist with
getting the pagecounter values:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3269"></a>
<pre class="SCREEN">
lp:
# run at job start
:as=/.../accounting_at_start
# run at job end
:ae=/.../accounting_at_end
# -a filter option value or last command line argument
:af=/.../acct
# default filter
:filter=/.../ifhp
# of filter - run before and after job, can be suspended
# desperation flag for desperate situations
#:suspend_of_filter@
:of=/.../ifhp
#options
:ifhp=...,of_options=pagecount waitend
</pre>
</div>
<br>
<br>
<p>The <var class="LITERAL">:as</var> program is run at
the start of a print job, and is used to determine if the
user has sufficient resourses to print a job. The <var
class="LITERAL">:ae</var> program is run at the end of a
print job and is used to collect the accounting
statistics. The <b class="APPLICATION">ifhp</b> filter
will write accounting information to the accounting file
specified by the command line <var class=
"OPTION">-a</var> option, or the last command line
argument. When both the <var class="LITERAL">:of</var>
filter and normal filters are used together, the
accounting information will be nested as shown.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3277"></a>
<pre class="SCREEN">
Normal Mode:
start '-qProcessID' '-pPagecounter' \
'-tStartTime' '-Pprinter' '-Hhost' '-nuser' '-Raccntinfo'
end '-bPages' '-Telapsed' '-qProcessID' '-pPagecounter'
'-tEndTime' '-Pprinter' '-Hhost' '-nuser' '-Raccntinfo' \
'-TElapsedTime'
OF Mode:
filestart '-qProcessID' '-pPagecounter' \
'-tStartTime' '-Pprinter' '-Hhost' '-nuser' '-Raccntinfo'
fileend '-bPages' '-Telapsed' '-qProcessID' '-pPagecounter' \
'-tEndTime' '-Pprinter' '-Hhost' '-nuser' '-Raccntinfo'
Sample Accounting File Entry:
start '-q10699' '-p234' '-t2000-05-24-09:27:47.784' \
-Plp -Hh4.private -npapowell
filestart '-q10700' '-p234' '-t2000-05-24-09:27:47.784' \
-Plp -Hh4.private -npapowell
fileend '-b0' '-T1' '-q10700' '-p235' '-t2000-05-24-09:27:47.863' \
-Plp -Hh4.private -npapowell
end '-b1' '-T1' '-q10699' '-p235' '-t2000-05-24-09:27:47.863'
-Plp -Hh4.private -npapowell
</pre>
</div>
<br>
<br>
<p>The format of the information written to the
accounting file is controlled by the <var class=
"LITERAL">accounting_info=AHPn</var> <b class=
"APPLICATION">ifhp</b> configuration value. If they are
present, the specified <b class="APPLICATION">ifhp</b>
command line flags are appended to the end of the
standard accounting information. The <var class=
"LITERAL">accounting=...</var> option specfies a program
to run at then end of the job. This program has all of
the accounting information passed as command line
options. The program should exit with a 0 exit code;
otherwise the results are undefined.</p>
<p>The printcap <var class=
"SYMBOL">:suspend_of_filter</var> controls how the <b
class="APPLICATION">lpd</b> spooler manages the <var
class="LITERAL">of</var> filter. When a file is to be
printed normally, a special two character suspend message
(<var class="LITERAL">\031\001</var>) is written to the
filter STDIN. When the <b class="APPLICATION">ifhp</b>
filter detects this string in the input it is required to
suspend itself by sending itself a <var class=
"LITERAL">SIGSUSP</var> signal. The <var class=
"LITERAL">:suspend_of_filter@</var> flag causes the <b
class="APPLICATION">lpd</b> process to close the <var
class="LITERAL">:of</var> filter rather than suspending
it, and to start a new <var class="LITERAL">:of</var>
filter process when it needs one. This option is used
when there can be at most one process communicating with
the printer, or when the <b class="APPLICATION">ifhp</b>
filter must totally reinitialize the printer at job
end.</p>
<p>The <var class="LITERAL">pagecount</var> option
controls if and how the pagecounter value will be
fetched. Currently <var class=
"LITERAL">pagecount=ps</var> (PostScript) and <var class=
"LITERAL">pagecount=pjl</var> (PJL) are supported. The
<var class="LITERAL">pagecount</var> form will use PJL if
it is available; otherwise PostScript if it is available.
The <var class="LITERAL">pagecount@</var> suppresses
pagecount operation. The <var class=
"SYMBOL">pagecount_start</var> and <var class=
"SYMBOL">pagecount_end</var> flags control if the
pagecounter will be obtained at the start and end of the
print job.</p>
<p>One of the major problems with getting printcounter
values is that the print job must be totally finished or
at least have all of its pages run through the paper feed
stream when the pagecounter value is reported.
Unfortunately, most manufacturers do not provide accurate
ways to coordinate the two activities. The <var class=
"LITERAL">waitend</var> option is used to enable the <b
class="APPLICATION">ifhp</b> filter to send special
command sequences to the printer which will detect the
true end of job, but this may not be possible on many
printers.</p>
<p>The <var class="LITERAL">printcounter_poll=N</var>
(default 1) option provides a method to deal with these
types of printers. Commands to get the printcounter value
are sent to the printer, and repeated at <var class=
"SYMBOL">printcap_interval</var> second intervals until
the printcounter value has been stable for <var class=
"LITERAL">N</var> readings.</p>
<p>The PJL TEOJ (True End Of Job) command has been used
with only limited success to force End of Job reporting
only when the job has finished. This can be sent to the
printer during PJL initialization by specifying it as one
of the PJL initialization strings:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3312"></a>
<pre class="SCREEN">
pjl_init=[ ... teoj ... ]
pjl_teoj=@PJL TEOJ=ON
</pre>
</div>
<br>
<br>
<p>The <a href="#OFOPTIONS"><var class=
"SYMBOL">of_options</var></a> are used to modify the
actions of the <b class="APPLICATION">ifhp</b> filter
when it is running in OF Mode.</p>
<p>The <var class="SYMBOL">pagecount_start</var> and <var
class="SYMBOL">pagecount_end</var> (both default to TRUE
or ON) control if pagecounter values are obtained at the
start or end respectively of the job.</p>
<p>The pagecount request is sent to the printer every
<var class="LITERAL">pagecount_interval=nnn</var> second
intervals; if nnn is 0, then it is sent only once. If no
pagecount value is obtained within <var class=
"LITERAL">pagecount_timeout=nnn</var> seconds then the
filter exits with an error.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="PJLINIT">7.5. PJL
Initialization</a></h2>
<ul>
<li>
<p><var class="LITERAL">pjl_init=[ ... ]</var><span
class="emphasis"><i class="EMPHASIS">pjl
initialization</i></span></p>
</li>
<li>
<p><var class="LITERAL">startpage=</var><span class=
"emphasis"><i class="EMPHASIS">start page to
print</i></span></p>
</li>
<li>
<p><var class="LITERAL">endpage=</var><span class=
"emphasis"><i class="EMPHASIS">end page to
print</i></span></p>
</li>
<li>
<p><var class="LITERAL">pjl_only=[ ... ]</var><span
class="emphasis"><i class="EMPHASIS">pjl commands
supported</i></span></p>
</li>
<li>
<p><var class="LITERAL">pjl_except=[ ... ]</var><span
class="emphasis"><i class="EMPHASIS">pjl commands not
to be used</i></span></p>
</li>
<li>
<p><var class="LITERAL">pjl_vars_set=[ ...
]</var><span class="emphasis"><i class="EMPHASIS">pjl
variables supported</i></span></p>
</li>
<li>
<p><var class="LITERAL">pjl_vars_except=[ ...
]</var><span class="emphasis"><i class="EMPHASIS">pjl
variables not to be used</i></span></p>
</li>
<li>
<p><var class="LITERAL">pjl_user_opts=[ ...
]</var><span class="emphasis"><i class="EMPHASIS">pjl
options available to user</i></span></p>
</li>
</ul>
<p>If a printer supports PJL, the many printer operations
can be initiated and controlled using PJL commands.
Unfortunately, not all printers support the same set of
commands. In addition, not all printers support the same
set of operations or options. A PJL command has the
form:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3360"></a>
<pre class="SCREEN">
@PJL COMMAND OPTION OPTION ...
</pre>
</div>
A PJL variable is set using:
<div class="INFORMALEXAMPLE">
<a name="AEN3362"></a>
<pre class="SCREEN">
@PJL SET <span class="emphasis"><i class=
"EMPHASIS">var</i></span> = <span class="emphasis"><i class=
"EMPHASIS">value</i></span> ...
</pre>
</div>
The <var class="LITERAL">pjl_only=[ ... ]</var>, <var
class="LITERAL">pjl_except=[ ... ]</var>, <var class=
"LITERAL">pjl_vars_set=[ ... ]</var>, and <var class=
"LITERAL">pjl_vars_except=[ ... ]</var> options are used
to control which PJL commands and which PJL variables can
be set. The <var class="SYMBOL">pjl_only</var> variable
lists the commands supported by the printer, and the <var
class="SYMBOL">pjl_except</var> lists commands <span
class="emphasis"><i class="EMPHASIS">not</i></span>
supported by the printer. Before sending a PJL command,
the <b class="APPLICATION">ifhp</b> filter checks to make
sure that the command name is in <var class=
"SYMBOL">pjl_only</var> and not in <var class=
"SYMBOL">pjl_except</var>. If the tests fail, then tne
command is not sent.<br>
<br>
<p>Similarly, when sending a command to set a PJL
variable, the <var class="SYMBOL">pjl_vars_set</var> and
<var class="SYMBOL">pjl_vars_except</var> lists are
checked to determine if the variable name is in <var
class="SYMBOL">pjl_vars_set</var> and not in <var class=
"SYMBOL">pjl_except</var> list. If the tests fail, then
tne command is not sent.</p>
<p>If PJL is enabled, then the following actions are
taken.</p>
<ol type="1">
<li>
<p>PJL Universal Exit Language (UEL) <var class=
"LITERAL">\033%-12345X</var> is sent to the
printer.</p>
<p>This is required to ensure that the following PJL
commands are accepted.</p>
</li>
<li>
<p>PJL JOB command is sent at the start of job. The
JOB command can be used to select pages or
impressions to be printed. If the <var class=
"LITERAL">-Zstartpage=nnn</var> or <var class=
"LITERAL">-Zendpage=mmm</var> option is present, then
the PJL JOB command has the form:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3391"></a>
<pre class="SCREEN">
@PJL JOB START=nnn END=mmm
</pre>
</div>
<br>
<br>
</li>
<li>
<p>The <var class="LITERAL">pjl_init=[ ... ]</var>
value option is expanded using the PJL (<var class=
"LITERAL">"pjl_"</var>) language context as described
above.</p>
</li>
<li>
<p>The <var class="LITERAL">-Toption=value</var>s and
<var class="LITERAL">-Zoption=value</var>s are
scanned for matching option names in the <var class=
"LITERAL">pjl_user_opts=[ ... ]</var> list. If they
are found, then the options are recursively evaluated
in the PJL language context. The expansion algorithm
will cause the option value to be used to set PJL
variables. For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3402"></a>
<pre class="SCREEN">
Configuration:
pjl_vars_set=[ OUTBIN AUTOSELECT JAM=YES ]
Command
ifhp -Zoutbin=upper,autoselect,jam
PJL command generated:
@PJL SET OUTBIN=UPPER
@PJL SET AUTOSELECT=ON
@PJL SET JAM=YES
</pre>
</div>
<br>
<br>
</li>
</ol>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="FILECONVERSION">7.6. File
Conversion Support</a></h2>
<ul>
<li>
<p><var class="LITERAL">forceconversion</var> FLAG
<span class="emphasis"><i class="EMPHASIS">force use
of file utility</i></span></p>
</li>
<li>
<p><var class="LITERAL">default_language=</var><span
class="emphasis"><i class="EMPHASIS">default job
language</i></span></p>
</li>
</ul>
<p>The <tt class="COMMAND">lpr -l</tt> or <tt class=
"COMMAND">lp -b</tt> flags indicate that the spooled
files are not to be processed by an output filter. The <b
class="APPLICATION">LPRng</b> spooler recognizes this
option and passes the <var class="OPTION">-c</var>
command line option to suppress any language specific
processing for files.</p>
<p>However, many PostScript printers cannot handle text
files, and produce many hundreds of pages of garbage
output if they are sent to the printer without being
translated into PostScript, and some printers require
language specific setup in order to print PCL, PostScript
or text files correctly.</p>
<p>The <b class="APPLICATION">ifhp</b> filter has builtin
tests for PJL, PCL, and PostScript files. These tests are
almost identical to those used by many printers which do
<span class="emphasis"><i class=
"EMPHASIS">autodetection</i></span>. If you need to
recognize a wider range of file types, you can configure
<b class="APPLICATION">ifhp</b> to use the UNIX <var
class="LITERAL">file</var>(1) program.</p>
<p>Finally, some printers have a very specialized job
format that requires conversion to by a <var class=
"LITERAL">rasterizer</var> program. This is handled as
detailed in the following sections.</p>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="FILE-UTIL-PATH">7.6.1. File
Type Detection</a></h3>
<ul>
<li>
<p><var class="LITERAL">file_util_path=</var><span
class="emphasis"><i class="EMPHASIS">file utilty
path</i></span></p>
</li>
<li>
<p><var class="LITERAL">forceprocessing</var> FLAG
<span class="emphasis"><i class="EMPHASIS">force
file processing</i></span></p>
</li>
</ul>
<p>The <b class="APPLICATION">ifhp</b> filter has a set
of built-in tests to determine if the input job file is
PJL, PostScript, and PCL, or (default) text, and flags
the file with language types <var class=
"LITERAL">pjl</var>, <var class="LITERAL">ps</var>,
<var class="LITERAL">pcl</var>, and <var class=
"LITERAL">text</var> respectively.</p>
<p>You can also use the UNIX <a href="#FILEUTIL">file
utility</a> utility to determine type as well. The <var
class="LITERAL">file</var> utility is invoked with it
<acronym class="ACRONYM">STDIN</acronym> attached to
the file and <b class="APPLICATION">ifhp</b> uses the
information it writes to <acronym class=
"ACRONYM">STDOUT</acronym> as the raw file type. The <b
class="APPLICATION">ifhp</b> program will convert the
output to lowercase, remove multiple whitespace
characters, and replace the remaining whitespace
characters with underscores <var class=
"SYMBOL">_</var>.</p>
<p>By default, <b class="APPLICATION">ifhp</b> will not
try to detect <span class="emphasis"><i class=
"EMPHASIS">binary</i></span> files, i.e. - files
printed with the binary or literal flag (<var class=
"LITERAL">-c</var> command line flag). You can use the
<var class="LITERAL">forceprocessing</var> flag to
cause all files of all types to be processed. <b class=
"APPLICATION">ifhp</b> will first try to use its
builtin tests and then will use the <var class=
"LITERAL">file</var> utility. You can set the <var
class="SYMBOL">forceconversion</var> flag to force <b
class="APPLICATION">ifhp</b> to only use the <var
class="LITERAL">file</var> utility. The following shows
the information in the <tt class=
"FILENAME">ifhp.conf</tt> file used to configure the
file type detection.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3464"></a>
<pre class="SCREEN">
##forceprocessing - check all files for type - default 'no'
forceprocessing@
## default
default_language=text
## force only use of file program
## default is to let ifhp try first, then try file
forceconversion@
## file utility path
file_util_path=/usr/bin/file -
</pre>
</div>
<br>
<br>
<p>The output of the file utility is converted to lower
case and used as the language type for further
processing.</p>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="CONVERSION">7.6.2.
Conversion</a></h3>
<ul>
<li>
<p><var class="LITERAL">file_output_match=</var>
TABLE <span class="emphasis"><i class=
"EMPHASIS">file utility output match
list</i></span></p>
</li>
<li>
<p><var class="LITERAL">language=</var><span class=
"emphasis"><i class="EMPHASIS">language type
override</i></span></p>
</li>
</ul>
<p>Once the language type has been determined, the <b
class="APPLICATION">ifhp</b> filter then decides if a
conversion program needs to be run and will convert the
input file to a required file type. This activity is
controlled by the <var class=
"SYMBOL">file_output_match</var> table.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3481"></a>
<pre class="SCREEN">
file_output_match = [
*postscript* ps \%s{ps_converter}
*pcl* pcl \%s{pcl_converter}
*pjl* pjl \%s{pjl_converter}
*printer*job*language* pjl
*text* pcl \%s{pcl_converter}
*gzip_compressed* filter \%s{gzip_decompresser}
]
</pre>
</div>
Each line of the <var class=
"SYMBOL">file_output_match</var> table contains a (URL
encoded) <span class="emphasis"><i class=
"EMPHASIS">glob</i></span> pattern, the language type
(<var class="LITERAL">ps</var>, <span class=
"emphasis"><i class="EMPHASIS">pcl</i></span>, etc.)
produced by the conversion program, and the (optional)
conversion program.<br>
<br>
<p>The format:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3488"></a>
<pre class="SCREEN">
file_output_match = </pathname
</pre>
</div>
<br>
<br>
<p>will cause <b class="APPLICATION">ifhp</b> to open
and read the specified file for the <var class=
"SYMBOL">file_output_match</var> table. The file's
contents must have the same format as the <var class=
"SYMBOL">file_output_match</var> table but without the
<var class="LITERAL">[</var> or <var class=
"LITERAL">]</var> delimiters.</p>
<p>The <var class="SYMBOL">file_match_table</var> is
scanned from first to last entry for a <var class=
"LITERAL">glob</var> pattern that matches the file type
determined by the <b class="APPLICATION">ifhp</b>
program or the output of the <var class=
"SYMBOL">file_util_path</var> program. If no match is
found, then the language is set to the <var class=
"SYMBOL">default_language</var> value.</p>
<p>The output language of the conversion program is set
to the second entry. The conversion program will be run
with its STDIN set to the input file and its STDOUT
used as the converted output. If there is no conversion
program then the original file is used and only the
language type is modified.</p>
<p>The <var class="LITERAL">filter</var> language type
causes the specified conversion program to be run and
then the output of the program to be reprocessed. As
shown above, this allows file decompression routines to
be used to expand the files.</p>
<p>The following are some short samples of what can be
done with the conversion facility.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3506"></a>
<pre class="SCREEN">
# set up GhostScript
gs_device=epsonc
gs_options=-r1440
gs=/usr/bin/gs
gs_converter= [ \%s{gs} -dBATCH -q -sOutputFile=- \
-sDEVICE=\%s{gs_device} \%s{gs_options} - ]
# use GhostScript for conversion
ps_converter = [ \%{gs_converter} ]
text_converter= [/usr/bin/a2ps -q -B -1 -M Letter \
--borders=no -o- \%s{ps_converter} ]
gzip_decompresser = [ /usr/bin/gzip -c -d ]
[ ghostscript gs ]
file_output_match = [
*postscript* ps \%s{ps_converter}
*text* pcl \%s{pcl_converter}
*gzip_compressed* filter \%s{gzip_decompresser}
]
Printcap entry:
pr:
:ifhp=model=ghostscript,gs_device=laserjet,gs_options=-r300x300
</pre>
</div>
<br>
<br>
<p>In this example, we have shown a very interesting
device - the GhostScript device. We use the <var class=
"LITERAL">gs</var> (GhostScript) program to do the
conversion, and specify the <var class=
"SYMBOL">gs_device</var> and <var class=
"SYMBOL">gs_options</var> values in the printcap entry.
There are a few details that should be observed when
using this facility.</p>
<ol type="1">
<li>
<p>The output from the <var class=
"LITERAL">file</var> program has spaces converted
to underscores. If you need to match spaces then
use the underscore in the pattern. For example,
<var class="LITERAL">ascii text</var> would be
matched by <span class="emphasis"><i class=
"EMPHASIS">*ascii_text*</i></span>.</p>
</li>
<li>
<p>If the conversion program contains a shell meta
character such as <var class="LITERAL">|</var>,
<var class="LITERAL">;</var>, <var class=
"LITERAL">></var>, <var class=
"LITERAL"><</var>, etc, then it will be executed
using <var class="LITERAL">/bin/sh -c
'command'</var>. This allows a pipe of conversion
commands to be constructed. This is discussed in
detail below.</p>
</li>
<li>
<p>The most commonly used conversion programs are
<a href="#GHOSTSCRIPT">GhostScript</a>, used to
convert PostScript to a format compatible with a
non-PostScript printer, and the <a href=
"#A2PS">a2ps</a>, <a href="#ENSCRIPT">enscript</a>,
and <a href="#TEXTPS">textps</a> Text to PostScript
conversion programs which convert text into
PostScript for a non-text supporting printer. The
use of a <var class="LITERAL">wrapper</var> program
with these utilities is discussed below.</p>
</li>
<li>
<p>All of the command line options can be
substituted on the command line using <var class=
"LITERAL">\%{X}</var>, where <span class=
"emphasis"><i class="EMPHASIS">X</i></span> is the
single letter command line option flag.</p>
</li>
<li>
<p>The <var class="LITERAL">\%s{ARGV}</var> value
is replaced by the command line arguments.</p>
</li>
<li>
<p>The conversion program must exit with a 0 error
code or an error is assumed to have occurred.</p>
</li>
</ol>
<br>
<br>
<p>The <var class="LITERAL">enscript</var> program will
exit with a non-zero error codes even for successful
conversions and we need to use a <var class=
"LITERAL">wrapper</var> script that will run it and
then return the correct error code as shown below.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3544"></a>
<pre class="SCREEN">
#!/bin/sh
# /usr.../wrapper path [options]
# wrapper script for a2ps, enscript and others
# path is the path to the program and options are the
# options to pass. The program is run and then the exit
# code is corrected
"$@"
status=$?
case "$status" in
1 ) exit $status ;;
esac
exit 0
</pre>
</div>
<br>
<br>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="CRLF">7.6.3. LF to CR/LF
Conversion</a></h3>
<ul>
<li>
<p><var class="LITERAL">crlf</var> FLAG <span
class="emphasis"><i class="EMPHASIS">LF to CR-LF
conversion</i></span></p>
</li>
</ul>
<p>When processing <var class="LITERAL">text</var> or
<span class="emphasis"><i class=
"EMPHASIS">pcl</i></span> files, the <var class=
"LITERAL">crlf</var> option will enable translation of
LF (<var class="LITERAL">\n</var>) to CR/LF (<span
class="emphasis"><i class="EMPHASIS">\r\n</i></span>)
sequences. If you are using <b class=
"APPLICATION">ifhp</b> to simply do LF to CR/LF
translation, then you can use:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3560"></a>
<pre class="SCREEN">
ifhp -Tcrlf
</pre>
</div>
<br>
<br>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="AEN3562">7.6.4. Text Treated
Like PCL</a></h3>
<p>Text is simply PCL with no special formatting codes.
However, you will still need to send the PCL
initialization strings to the printer. You can do this
by using the following entry in the <var class=
"SYMBOL">file_output_match</var> table:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3566"></a>
<pre class="SCREEN">
file_output_match = [
*text* pcl
]
</pre>
</div>
<br>
<br>
</div>
<div class="SECT2">
<hr>
<h3 class="SECT2"><a name="AEN3568">7.6.5. Default to
Passthrough</a></h3>
<p>Your printer may be capable of handling a wide
variety of job formats. If you want to simply pass
through files of unknown type or language then use the
following entry in the <var class=
"SYMBOL">file_output_match</var> table:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3572"></a>
<pre class="SCREEN">
file_output_match = [
* raw
]
</pre>
</div>
<br>
<br>
</div>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="GHOSTSCRIPTCONFIG">7.7.
GhostScript Printer</a></h2>
<p>Generating a raster image from a PostScript or PCL
file in a timely manner requires a high speed processor
and substantial amounts of memory. Many of the low cost
printers require the user's system to do the raster
conversion, and a raster file is then transferred to the
printer. These files are usually in a proprietary format.
The <a href="#GHOSTSCRIPT">GhostScript</a> program can
process PostScript files and produce raster output for a
wide range of devices. See the GhostScript documentation
for details. Some printers have PCL support but do not
support PostScript. The <var class="LITERAL">gs</var> and
<var class="LITERAL">pcl_gs</var> printer configuration
support these printers.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3580"></a>
<pre class="SCREEN">
# PRINTER ghostscript - Printer with GhostScript conversion to raster files
gs_converter= [ /usr/bin/gs -dSAFER -dBATCH -q
-sOutputFile=- -sDEVICE=\%s{gs_device} \%s{gs_options} -
]
text_converter= [ /usr/bin/a2ps -q -B -1 -M Letter --borders=no -o-
]
[ ghostscript gs ]
pcl@
pjl@
ps
text@
file_output_match = [
# PostScript to Raster
*postscript* raw \%s{gs_converter}
# text to PostScript to Raster conversion
*text* filter \%s{text_converter}
]
# PRINTER pcl_gs - PCL Printer with GhostScript conversion to raster files
[ pcl_gs ]
pcl
pjl@
ps
text@
file_output_match = [
# PostScript to Raster
*postscript* raw \%s{gs_converter}
*pcl* pcl
# text to PostScript to Raster conversion
*text* filter \%s{text_converter}
]
</pre>
</div>
<br>
<br>
<p>The <var class="LITERAL">\%s{gs_device}</var> and <var
class="LITERAL">\%s{gs_options}</var> parameters can now
be specified in the printcap. The following shows a
typical printcap entry for use with this entry.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3585"></a>
<pre class="SCREEN">
# force clients (lpr, lpq, to use server)
lp:lp=lp@serverhost
# server information
lp:server
:sd=<span class="emphasis"><i class=
"EMPHASIS">spooldir</i></span>
:lp=/dev/lpt0
:...
:ifhp=model=gs,gs_device=epson,gs_options=-r240x72
#path to ifhp filter
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
<p>The <b class="APPLICATION">ifhp</b> configuration
entry uses GhostScript to do the rasterization of the
PostScript file, and the <var class="LITERAL">a2ps</var>
program to do a text to PostScript conversion.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="LANGUAGEINIT">7.8. Language
Specific Initialization</a></h2>
<ul>
<li>
<p><var class="LITERAL">ps_init=</var> <span class=
"emphasis"><i class="EMPHASIS">PostScript
initialization steps</i></span></p>
</li>
<li>
<p><var class="LITERAL">pcl_init=</var> <span class=
"emphasis"><i class="EMPHASIS">PCL initialization
steps</i></span></p>
</li>
</ul>
<p>After determining the output file language type,
language specific operations are then carried out by
expanding the <var class="SYMBOL">language</var><var
class="LITERAL">_init=[ ... ]</var> options in the
language context, and then the options in the <var class=
"LITERAL">-Toption=value</var> and <var class=
"LITERAL">-Zoption=value</var> command line options. The
<var class="OPTION">-T</var> options are expanded before
the <var class="OPTION">-Z</var>, allowing the <var
class="OPTION">-Z</var> actions to override any set by
the <var class="OPTION">-T</var> actions.</p>
<p>As mentioned elsewhere, the reason for the language
specific processing is to allow different actions for the
same command line option, depending on the file type that
is being processed. For example, when processing a PCL
file it might be necessary to send PCL command strings
and when processing a PostScript file, you would need to
send PostScript commands.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="FILETRANSFER">7.9. File
Transfer and Error Status Monitoring</a></h2>
<ul>
<li>
<p><var class="LITERAL">logall</var> FLAG <span
class="emphasis"><i class="EMPHASIS">log all printer
status</i></span></p>
</li>
<li>
<p><var class="LITERAL">pjl_error_codes</var> TABLE
<span class="emphasis"><i class="EMPHASIS">PJL error
code translations</i></span></p>
</li>
<li>
<p><var class="LITERAL">pjl_quiet_codes</var> TABLE
<span class="emphasis"><i class="EMPHASIS">ignore
these PJL error codes</i></span></p>
</li>
<li>
<p><var class="LITERAL">pjl_alert_codes</var> TABLE
<span class="emphasis"><i class="EMPHASIS">alert
operation on these PJL error codes</i></span></p>
</li>
<li>
<p><var class="LITERAL">pjl_alert_handler</var> TABLE
<span class="emphasis"><i class="EMPHASIS">program to
alert operator</i></span></p>
</li>
</ul>
<p>If the printer can return status, i.e., the <var
class="LITERAL">status</var> option is on, the filter
will read status information from the printer.</p>
<p>If the <var class="LITERAL">logall</var> flag is SET,
then all error messages will be written to the status or
log file.</p>
<p>If the printer is returning PJL status information,
then this has a specific format:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3640"></a>
<pre class="SCREEN">
@PJL UINFO DEVICE
CODE=nnnn
DISPLAY="value"
...
@PJL UINFO JOB
START
...
@PJL UINFO JOB
END
...
</pre>
</div>
<br>
<br>
<p>The <b class="APPLICATION">ifhp</b> program will
extract the <acronym class="ACRONYM">CODE</acronym> and
job start and end flags, and log these as
appropriate.</p>
<p>Unfortunately, some PJL based printers are extremely
verbose in their generation of status messages. In order
to reduce the amount of logging of redundant information,
<b class="APPLICATION">ifhp</b> will only record when a
device status has <span class="emphasis"><i class=
"EMPHASIS">changed</i></span>, rather than when it has
been reported.</p>
<p>The pjl_quiet_codes=[ code code code ] value is used
to suppress reporting of selected error codes. If the
error code is in the pjl_quiet_codes list, then the error
status will not be reported to the user unless the <var
class="LITERAL">logall</var> option is set. The list of
values is used as <span class="emphasis"><i class=
"EMPHASIS">glob</i></span> patterns. For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3651"></a>
<pre class="SCREEN">
pjl_quiet_codes=[ 10000 10001 10003 10023 10024 35078 41* ]
</pre>
</div>
<br>
<br>
<p>Also, there may be error codes which do not have a
builtin error message available. New messages can be
added using the <var class="SYMBOL">pjl_error_codes</var>
option. Its value is a list of lines, each line
consisting of an error code followed by the corresponding
error message:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3655"></a>
<pre class="SCREEN">
pjl_error_codes=[
code=msg
code=msg
...
]
Example:
pjl_error_codes=[
10000=powersave mode
10001=Ready Online
10002=Ready Offline
10003=Warming Up
10004=Self Test
10005=Reset
]
</pre>
</div>
<br>
<br>
<p>Finally, there are codes or classes of codes that
require operator intervention. These are specified using
the <var class="SYMBOL">pjl_alert_codes</var>, and the
<var class="SYMBOL">pjl_alert_handler</var> program will
be invoked to send them to the appropriate destination.
The formated error message will be available on STDIN for
the handler. For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3660"></a>
<pre class="SCREEN">
pjl_alert_codes=[ 41* 42* 23* ]
pjl_alert_handler=/usr/local/libexec/filters/alert_handler
</pre>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="WAITEND">7.10. End of
Job</a></h2>
<ul>
<li>
<p><var class="LITERAL">waitend</var> OPTION <span
class="emphasis"><i class="EMPHASIS">wait for job
completion status</i></span></p>
</li>
<li>
<p><var class="LITERAL">waitend_interval=</var><span
class="emphasis"><i class="EMPHASIS">query for end at
this interval</i></span></p>
</li>
<li>
<p><var class=
"LITERAL">waitend_ctrl_t_interval=</var><span class=
"emphasis"><i class="EMPHASIS">send CTRL-T at this
interval</i></span></p>
</li>
</ul>
<p>The <var class="LITERAL">waitend</var> option controls
the job termination sequence. By default, this will do
the same work as the <var class="LITERAL">sync</var>
operation, and the option takes the same set of
values.</p>
<p>If <var class="LITERAL">waitend</var> is suppressed
using <var class="LITERAL">waitend@</var>, then as soon
as a job has been transferred, the next step, <var class=
"LITERAL">pagecount</var>, will be attempted. If the
print job has not finished at this point, then erroneous
page counts will be reported.</p>
<p>When the <var class="LITERAL">appsocket</var> protocol
is used, suppressing <var class="LITERAL">waitend</var>
will cause no error messages from the printer to be
reported.</p>
<p>Some printers do not have a True End Of Job reporting
capability using PJL. This means that the job will be
reported as done, but paper is still moving through the
print engine. If you try to get pagecounts at this point
you will get the wrong value. An alternative method is to
set <var class="LITERAL">waitend=ps</var> and The <var
class="LITERAL">end_ctrl_t=word:word:...</var> This will
cause a CONTROL-T to be sent to the printer, a PostScript
convention that will cause the PostScript interpreter to
return the actual printing status. In most printers this
will be <var class="LITERAL">printing</var> or something
other than <var class="LITERAL">idle</var> or <span
class="emphasis"><i class="EMPHASIS">busy</i></span> as
long as paper is moving in the print engine. When status
is returned, the words in the <var class=
"LITERAL">end_ctrl_t=word:word:...</var> list value are
examined for a match. If the status word is present then
the end of job condition is assumed.</p>
<p>The <var class="SYMBOL">waitend_interval</var> value
controls how often the waitend operation is repeated.
This is usually set to a fairly large value, as it is
normally used only to recover from printer failures such
as users turning the printer on and off.</p>
<p>The <var class="SYMBOL">waitend_ctrl_t_interval</var>
controls how often the printer is queried for status
using CTRL-T and is usually set to a short (2 or 3
second) value.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="APPSOCKET">7.11. Tektronix
Phaser, QMS and AppSocket Support</a></h2>
<ul>
<li>
<p><var class="LITERAL">appsocket</var> FLAG <span
class="emphasis"><i class="EMPHASIS">connect to
printer and use AppSocket Protocol</i></span></p>
</li>
</ul>
<p>The <var class="LITERAL">appsocket</var> flag is used
to specify that data transfer will be done using the <a
href="#APPSOCKETPC">AppSocket</a> protocol. The <b class=
"APPLICATION">ifhp</b> filter will open a connection to
the ip address and port specified by the <var class=
"LITERAL">dev=host%port</var> option and carry out the
various operations that it needs to do.</p>
<p>Normally after sending information to the printer a
<code class="FUNCTION">close()</code> operation is done
on the network connection. This will usually be
acceptible as the printer will print the job that was
sent to it. However, some printers require that the
network connection be left open to report status.</p>
<p>If page count information is needed, the <b class=
"APPLICATION">ifhp</b> filter will then reopen the
connection and get the page count information.</p>
</div>
</div>
<div class="CHAPTER">
<hr>
<h1><a name="AEN3714"></a>Chapter 8. Banners and OF Mode
Operation</h1>
<p>One of the more difficult administrative issues is
whether to print banners (job separators) or to save the
large amount of wasted paper, time and effort. The <b
class="APPLICATION">LPRng</b> and <b class=
"APPLICATION">ifhp</b> combination provide a rather
esoteric set of methods to generate banners, at least one
of which should be suitable for your application.</p>
<p>You should be aware that some printers have the
obnoxious habit of generating their own banner pages when
jobs are transferred via the RFC1179 protocol. You should
consult the manufacturers documentation and take the
necessary steps to turn printer banner page generation off.
It may turn out that this is impossible to do, and in that
case the only option is to use the Socket or Appsocket
connection methods.</p>
<p>In the original BSD print spooler, the <var class=
"LITERAL">:of</var> print filter was responsible for banner
generation. The print server would send it a <span class=
"emphasis"><i class="EMPHASIS">magic string</i></span> that
the filter would recognize as a <span class="emphasis"><i
class="EMPHASIS">print a banner</i></span> request, and it
would then generate a banner. After this, another special
<var class="LITERAL">magic cookie</var> string, the
character sequence <var class="LITERAL">0x19,0x01</var>,
was sent to cause the <var class="LITERAL">:of</var> filter
to suspend itself. This allowed the print spooler to hold
the connection to the printer open while it started another
filter to transfer a file. Finally, after all the jobs were
sent, the <var class="LITERAL">:of</var> filter was sent a
<acronym class="ACRONYM">SIGCONT</acronym> signal to wake
up and perform whatever closing operations were
necessary.</p>
<p>This mixing of functionality causes horrible problems
when special setup strings must be sent to printers in
order to configure them for various operation. In order to
avoid these problems, the banner printing and filter
functions have been separated in the <b class=
"APPLICATION">ifhp</b> filter. If a banner is needed, then
<b class="APPLICATION">LPRng</b> will use a special banner
generating program to generate the banner. The output of
this program is then sent to the <var class=
"LITERAL">:of</var> filter, or directly to the printer if
there is no <var class="LITERAL">:of</var> filter.</p>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN3734">8.1. No
Banner</a></h2>
<p>Here is a typical printcap entry when banner printing
is not wanted:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3737"></a>
<pre class="SCREEN">
lp:
:sh
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
<p>The <var class="LITERAL">:sh</var> (suppress headers
or banners) explicitly disables banner printing, and the
<b class="APPLICATION">lpd</b> server will not even
attempt to print a banner.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN3742">8.2. Banner Printing
and No OF Filter</a></h2>
<p>This printcap entry specifies a banner generator
program and and banner generation. There is no <var
class="LITERAL">:of</var> filter specified, so the banner
is sent directly to the printer. In such a case the
banner printing program should make sure that it
generates output with the appropriate set of
initialization strings. The <var class=
"LITERAL">pclbanner</var>, <var class=
"LITERAL">psbanner</var>, and <var class=
"LITERAL">lpbanner</var> programs produce PCL,
PostScript, and text banners suitable for a wide range of
printers. The code for these banner generators is part of
the <b class="APPLICATION">LPRng</b> distribution.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3750"></a>
<pre class="SCREEN">
lp:
:bp=/.../pclbanner
:of=/.../ifhp
:filter=/.../ifhp
# or
:bp=/.../psbanner
:of=/.../ifhp
:filter=/.../ifhp
# or
:bp=/.../lpbanner
:of=/.../ifhp
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN3752">8.3. Banner Printing
With OF Filter</a></h2>
<p>Finally, we may want banner printing together with the
<var class="LITERAL">:of</var> filter. This is usually
the case when we need to perform special printer setups
or require the <b class="APPLICATION">ifhp</b> filter to
do accounting. In this case we need to make sure that the
banner page is counted as part of the job:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3757"></a>
<pre class="SCREEN">
lp:
:bp=/.../pclbanner <span class="emphasis"><i class=
"EMPHASIS">or</i></span> :bp=/.../psbanner <span class=
"emphasis"><i class="EMPHASIS">or</i></span> :bp=/.../lpbanner
:of=/.../ifhp
:filter=/.../ifhp
</pre>
</div>
<br>
<br>
<p>When invoked as an <var class="LITERAL">:of</var>
filter, the <b class="APPLICATION">lpd</b> server passes
a <var class="OPTION">-Fo</var> option on the command
line, so that the <b class="APPLICATION">ifhp</b> filter
knows what mode it is operating in.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN3766">8.4. <b class=
"APPLICATION">LPRng</b> Options Controlling Banner
Printing</a></h2>
<p>The <tt class="COMMAND">lpr -h</tt> (no header or
banner) option suppresses putting <span class=
"emphasis"><i class="EMPHASIS">banner name</i></span>
(<var class="LITERAL">L</var> line) into the control
file. The <b class="APPLICATION">LPRng</b> <var class=
"SYMBOL">:ab</var> (always banner) overrides this, and
will print a banner using the user name information. The
<var class="LITERAL">:sh</var> (suppress header) option
will override everything and prevent banners from being
generated.</p>
<p>Banners are generated by the <var class=
"LITERAL">:bp=/...</var> (banner program) program;
different banners at start and end can be generated by
using the <var class="LITERAL">:bs=/...</var> (banner
start) and <var class="LITERAL">:be=/...</var> (banner
end) options, which override the <var class=
"LITERAL">:bp=</var> option.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="OFOPTIONS">8.5. of_options
option</a></h2>
<p>This option, usually used on the command line or in
the <var class="LITERAL">printcap</var> file as part of
the <var class="LITERAL">:ifhp</var> information,
specifies a set of options to use when the filter is
running in OF mode. For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3786"></a>
<pre class="SCREEN">
lp:
:ifhp=sync@,pagecount@,waitend@,of_options=sync pagecount waitend
:filter=/usr/local/libexec/filtes/ifhp
:of=/usr/local/libexec/filtes/ifhp
same as:
lp:
:filter=/usr/local/libexec/filtes/ifhp -Tsync@,pagecount@,waitend@
:of=/usr/local/libexec/filtes/ifhp -Tsync,pagecount,waitend
</pre>
</div>
<br>
<br>
<p>In this printcap entry, the <b class=
"APPLICATION">ifhp</b> filter is invoked normally with
the <var class="LITERAL">sync@</var>, <var class=
"LITERAL">pagecount@</var> and <var class=
"LITERAL">waitend@</var> options. This causes it to send
jobs as fast as possible to the output device and only
monitor the device for error status. The <var class=
"LITERAL">of=</var> entry causes the <b class=
"APPLICATION">lpd</b> print spooler to start <b class=
"APPLICATION">ifhp</b> in OF mode, and the <var class=
"SYMBOL">of_options</var> are used to override the other
ones.</p>
</div>
</div>
<div class="CHAPTER">
<hr>
<h1><a name="AEN3797"></a>Chapter 9. Font Download
Support</h1>
<p>For historical reasons, there is support for downloading
a font or other file to the printer. A large amount of the
necessary operations are now in the <tt class=
"FILENAME">ifhp.conf</tt> file.</p>
<p>The <var class="SYMBOL">font_download</var> built-in
option supports downloading as described below.</p>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN3803">9.1. PCL Font
Downloading</a></h2>
<p>The following shows the a typical <tt class=
"FILENAME">ifhp.conf</tt> file which has PCL font
downloading enabled.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3807"></a>
<pre class="SCREEN">
#
# Fonts and Font Downloading
# fontid is used to set the current font
pcl_init=[ ... font ... ]
# combination command
pcl_font=[ delete_fonts font_id font_download font_primary ]
# font control
#
font_op=0
pcl_font_op=\033*c\%{font_op}F
pcl_delete_fonts=\033*c0F
font_id=1
pcl_font_id=\033*c\%{font_id}D
# set primary font
font_primary=1
pcl_font_primary=\033(\%{font_primary}X
# font directory
pcl_fontdir=/usr/local/lib/fonts
#default font file
font=c1201b.10
</pre>
</div>
<br>
<br>
<p>To allow users to download a font and have it set up
for PCL use, the <var class="SYMBOL">pcl_init</var>
option should include the <var class="LITERAL">font</var>
option in an appropriate position in the initialization
sequence. As shown above, this will get expanded into the
<var class="SYMBOL">pcl_delete_fonts</var>, <var class=
"SYMBOL">pcl_font_id</var>, <var class=
"SYMBOL">pcl_font_download</var> (which is has built-in
support), and the <var class=
"SYMBOL">pcl_font_primary</var> options, which are
expanded in order.</p>
<p>The <var class="SYMBOL">pcl_font_download</var> is
supported by the builtin operation which will find the
<var class="SYMBOL">pcl_fontdir</var> directory value and
a value for the <var class="LITERAL">font</var> variable,
using values from the <var class="OPTION">-Z</var> and
<var class="OPTION">-T</var> and configuration
information in that order. If no <var class=
"LITERAL">font</var> value is found, no font will be
downloaded. For example:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3823"></a>
<pre class="SCREEN">
lpr -Tfont=font1,font2
</pre>
</div>
<br>
<br>
<p>When the <var class="SYMBOL">pcl_font_download</var>
option is expanded, it will generate the pathnames <tt
class="FILENAME">/usr/local/lib/fonts/font1</tt> and <tt
class="FILENAME">/usr/local/lib/fonts/font2</tt>, open
these files, and send their contents directly to the
printer.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN3829">9.2. PS Font
Downloading</a></h2>
<p>PostScript font downloading is supported in a similar
manner to PCL font downloading.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3832"></a>
<pre class="SCREEN">
#
# Fonts and Font Downloading
#
ps_init=[ ... font ... ]
# combination command
ps_font=[ font_download ]
# font directory
ps_fontdir=/usr/local/lib/fonts
#default font file
font=font.ps.10
</pre>
</div>
<br>
<br>
<p>In a similar manner to the PCL font downloading, when
the <var class="SYMBOL">ps_init</var> list is expanded,
the <var class="SYMBOL">ps_font</var> entry will be
expanded in turn. If the <var class=
"LITERAL">-Zfont=ZapDingbat.ps</var> is specified, then
the <tt class=
"FILENAME">/usr/local/lib/fonts/ZapDingbat.sp</tt> file
will be opened and downloaded to the printer.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN3839">9.3. PJL File
Downloading</a></h2>
<p>In a similar manner to the above font downloading, you
can specify a configuration or other setup file that
should be sent to the printer as part of the PJL setups.
The following configuration shows how to set this up.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3842"></a>
<pre class="SCREEN">
#
# PJL Initialization File Downloading
# fontid is used to set the current font
pjl_init=[ ... setup ... ]
setup=initval
font=\%s{setup}
# setup directory
pjl_fontdir=/usr/local/lib/fonts
pjl_setup=[ font_download ]
</pre>
</div>
<br>
<br>
<p>The above configuration will cause the value of the
<var class="LITERAL">setup</var> <var class=
"OPTION">-Z</var>, <var class="OPTION">-T</var> or
configuration option to be used.</p>
</div>
</div>
<div class="CHAPTER">
<hr>
<h1><a name="AEN3848"></a>Chapter 10. Debugging and Problem
Solving</h1>
<p>If you are reading this section, then most likely you
have had a problem using <b class="APPLICATION">ifhp</b>
with <b class="APPLICATION">LPRng</b>. Before going any
further, please read <a href="#RFC1179PC">RFC1179 (BSD or
TCP/IP) Job Transfer Printcap Entry</a>, and make sure that
your printcap entry has the <var class=
"SYMBOL">lpd_bounce</var> flag set. This is the <span
class="emphasis"><i class="EMPHASIS">Most Frequently Asked
Question</i></span> and the <span class="emphasis"><i
class="EMPHASIS">Most Frequently Provided Answer</i></span>
on the <b class="APPLICATION">LPRng</b> mailing list.</p>
<p>The following section outlines a method to debug
problems with the <b class="APPLICATION">ifhp</b> filter.
It will make use of some <var class=
"LITERAL">diagnostic</var> options that are normally not
used in a printcap entry. First, let us start with a
typical printcap entry and a problem.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3861"></a>
<pre class="SCREEN">
lw4:
:lp=10.0.0.14%9100
:sd=/var/spool/lpd/%P
:ifhp=/usr/local/lib/filters/ifhp
Command:
lpr -Plw4 -V /etc/motd
LPR output:
sending job 'papowell@h4+223' to lw4@localhost
connecting to 'localhost', attempt 1
connected to 'localhost'
requesting printer lw4@localhost
sending control file 'cfA223h4.private' to lw4@localhost
completed sending 'cfA223h4.private' to lw4@localhost
sending data file 'dfA223h4.private' to lw4@localhost
completed sending 'dfA223h4.private' to lw4@localhost
done job 'papowell@h4+223' transfer to lw4@localhost
Version LPRng-3.6.14
</pre>
</div>
<br>
<br>
<p>When trying to print to the print queue, the user
discovers that no output comes out of the printer. The
immediate suspicion is that the filter is not working. You
should make sure that the <var class="LITERAL">lpr</var>
command is actually sending the job to the print queue. You
can then use <var class="LITERAL">lpq</var> to discover
what happened:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3866"></a>
<pre class="SCREEN">
# lpq -llll
Printer: lw4@h4 'Hp : Laserwriter'
Queue: no printable jobs in queue
Status: subserver pid 27251 starting at 15:34:09.350
Status: accounting at start at 15:34:09.357
Status: opening device 'h14.private%9100' at 15:34:09.366
Status: printing job 'root@h4+223' at 15:34:09.375
Status: printing data file 'dfA223h4.private', size 3, IF filter 'ifhp' at 15:34:09.376
Status: IF filter finished at 15:34:35.012
Status: printing done 'root@h4+223' at 15:34:35.012
Status: accounting at end at 15:34:35.014
Status: finished 'root@h4+223', status 'JSUCC' at 15:34:35.014
Status: subserver pid 27251 exit status 'JSUCC' at 15:34:35.018
Status: lw4@h4.private: job 'root@h4+223' printed at 15:34:35.020
Status: job 'root@h4+223' removed at 15:34:35.101
Filter_status: accounting at start, pagecount 89696, pages 0 at 15:34:13.304
Filter_status: sending job file at 15:34:13.306
Filter_status: starting transfer at 15:34:13.306
Filter_status: initial job type 'text' at 15:34:13.306
Filter_status: job type 'pcl' at 15:34:13.306
Filter_status: transferring 3 bytes at 15:34:13.308
Filter_status: 100 percent done at 15:34:13.308
Filter_status: finished writing file, cleaning up at 15:34:13.308
Filter_status: sent job file at 15:34:13.308
Filter_status: doing cleanup at 15:34:13.308
Filter_status: getting end using 'pjl job/eoj' at 15:34:13.309
Filter_status: end of job detected at 15:34:33.219
Filter_status: getting pagecount using 'pjl info pagecount' at 15:34:33.219
Filter_status: final pagecount 89697 at 15:34:35.009
Filter_status: accounting at end, pagecount 89697, pages 1 at 15:34:35.010
Filter_status: done at 15:34:35.010
</pre>
</div>
<br>
<br>
<p>As you can see from the <var class="LITERAL">lpq</var>
output, the <var class="LITERAL">Status</var> section shows
the <b class="APPLICATION">lpd</b> activities and the <var
class="SYMBOL">Filter_status</var> section shows what <b
class="APPLICATION">ifhp</b> is doing. This is the first
line of defense - make sure that the information and errors
reported here are for the correct filter.</p>
<p>If this does not help, then we will start with the basic
filter tests and work our way <span class="emphasis"><i
class="EMPHASIS">back</i></span> to the print server.
First, you will need a couple of test files. If you have a
PostScript printer, find a simple PostScript file - the <tt
class="FILENAME">ellipse.ps</tt> file is included in the <b
class="APPLICATION">ifhp</b> distribution in the <acronym
class="ACRONYM">UTILS</acronym> directory. You will also
need a short text file - <tt class=
"FILENAME">/etc/motd</tt> is usually handy to use.</p>
<p>Create the <tt class="FILENAME">/tmp/send</tt> file with
the following contents:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3882"></a>
<pre class="SCREEN">
#!/bin/sh
cp /dev/null /tmp/t
/usr/local/libexec/filters/ifhp -Tdev=/tmp/t,trace,debug=1 </etc/motd 2>/tmp/trace
</pre>
</div>
<br>
<br>
<p>This will create the <tt class="FILENAME">/tmp/t</tt>
file, run the <b class="APPLICATION">ifhp</b> filter, and
put the trace and debugging information into the <tt class=
"FILENAME">/tmp/trace</tt> file. Run this command
using:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3888"></a>
<pre class="SCREEN">
#!/bin/sh
sh -x /tmp/send
</pre>
</div>
<br>
<br>
<p>Examine the output in <tt class=
"FILENAME">/tmp/trace</tt>. It will look like:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3892"></a>
<pre class="SCREEN">
ifhp 15:46:14.402 [27307] main: Debug '1'
ifhp 15:46:14.403 [27307] main: dump <NULL>
ifhp 15:46:14.403 [27307] main: Model_id '<NULL>'
ifhp 15:46:14.440 [27307] main: scanning Raw for default, then model '<NULL>'
ifhp 15:46:14.441 [27307] Select_model_info: id 'default', list->count 1940, model->count 0, init 0
ifhp 15:46:14.448 [27307] Dump_line_list: main: Model information - count 156, max 204, list 0x806e000
ifhp 15:46:14.448 [27307] [ 0]='T=dev=/tmp/g,trace,debug=1'
ifhp 15:46:14.448 [27307] [ 1]='banner@'
ifhp 15:46:14.448 [27307] [ 2]='banner_file=/usr/local/libexec/filters/psbanner.ps'
ifhp 15:46:14.448 [27307] [ 3]='converter='
ifhp 15:46:14.448 [27307] [ 4]='debug=1'
ifhp 15:46:14.449 [27307] [ 5]='default_language=text'
ifhp 15:46:14.449 [27307] [ 6]='dev=/tmp/g'
ifhp 15:46:14.449 [27307] [ 7]='duplex_select=1'
</pre>
</div>
<br>
<br>
<p>Most of the information with debug level 1 is simply
showing the details of options, command execution, and
error status. This will, however, help with the majority of
problems.</p>
<p>You can now modify the <tt class=
"FILENAME">/tmp/send</tt> file to better reflect your
printer.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3897"></a>
<pre class="SCREEN">
#!/bin/sh
cp /dev/null /tmp/t
# substitute your ifhp options here
ifhp=model=hp4,status@
/usr/local/libexec/filters/ifhp -Tdev=/tmp/t,trace,debug=1,${ifhp} </etc/motd 2>/tmp/trace
</pre>
</div>
Now run this again and examine the trace and output in <tt
class="FILENAME">/tmp/t</tt>. If this looks correct, we
move on to the interactive tests.<br>
<br>
<p>If your printer is a network based printer and you are
using RFC1179 transfers, then you can use the following
<var class="LITERAL">lpr</var> command to send the <tt
class="FILENAME">/tmp/t</tt> file directly to the
printer:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3903"></a>
<pre class="SCREEN">
lpr -Ppr@host /tmp/t
Example:
print queue 'raw'
lpr -Praw@10.1.1.1 /tmp/t
</pre>
</div>
<br>
<br>
<p>This form of the command causes <var class=
"LITERAL">lpr</var> to send the job directly to the
printer. If this works correctly then we know that there is
no problem with <b class="APPLICATION">ifhp</b> formatting
the file, and that the problem must be with the <b class=
"APPLICATION">lpd</b> print spooler.</p>
<p>If your printer is network based and uses a socket
connection, then you can have <b class=
"APPLICATION">ifhp</b> connect to the printer by using the
<var class="LITERAL">dev=host%port</var> connection option.
This is only used for testing or when you want to use the
AppSocket protocol.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3912"></a>
<pre class="SCREEN">
#!/bin/sh
# substitute your ifhp options here
# this should always work
#ifhp=model=hp4,status@
# this does status checking, no pagecount
#ifhp=model=hp4,pagecount@
# this does status checking and pagecount
#ifhp=model=hp4
/usr/local/libexec/filters/ifhp -Tdev=10.1.1.1%9100,trace,debug=1,${ifhp} </etc/motd 2>/tmp/trace
</pre>
</div>
<br>
<br>
<p>If you have a windowing system, run this command from
one window and in another window use the <tt class=
"COMMAND">tail -f /tmp/trace</tt> command to view status.
Most of the time you will discover that the system is
failing to print because either the <var class=
"LITERAL">sync</var>, <var class="LITERAL">pagecount</var>,
or <var class="LITERAL">waitidle</var> step of the printing
process is not completing correctly. If there is
insufficient detail for you to decide the failure
mechanism, set <var class="LITERAL">debug=3</var>, or even
<var class="LITERAL">debug=4</var> and explore what is
happening.</p>
<p>If you have a parallel port connected printer on <tt
class="FILENAME">/dev/lptxx</tt>, then you can simply use
<tt class="COMMAND">cat /tmp/t >/dev/lptxx</tt> and see
what happens. If this works, then use:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3924"></a>
<pre class="SCREEN">
#!/bin/sh
# substitute your ifhp options here
ifhp=model=hp4,status@
/usr/local/libexec/filters/ifhp -Tdev=/dev/lptxxx,trace,debug=1,${ifhp} </etc/motd 2>/tmp/trace
</pre>
</div>
<br>
<br>
<p>If you have a serial port printer, then you can use a
similar method for setting up a connection. You will need
to use the undocumented <var class="LITERAL">stty</var>
option to set the speed and other parameters. These are
identical to those used by <b class=
"APPLICATION">LPRng</b>, so you should have no
problems.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3929"></a>
<pre class="SCREEN">
#!/bin/sh
# substitute your ifhp options here
# this should always work
#ifhp=model=hp4,status@
# this does status checking, no pagecount
#ifhp=model=hp4,pagecount@
# this does status checking and pagecount
#ifhp="model=hp4,stty= 9600 -parity crtscts raw"
stty="9600 -parity crtscts raw"
/usr/local/libexec/filters/ifhp -Tdev=/dev/tty00,trace,debug=1,${ifhp},stty=\"${stty}\" </etc/motd 2>/tmp/trace
</pre>
</div>
<br>
<br>
<p>If all this does not help, then subscribe to the <b
class="APPLICATION">LPRng</b> mailing list and ask for
help.</p>
</div>
<div class="APPENDIX">
<hr>
<h1><a name="IFHPOPTIONS"></a>Appendix A. Index to
Options</h1>
<p> </p>
<div class="TABLE">
<a name="IFHPOPTIONSTABLE"></a>
<p><b>Table A-1. <var class="LITERAL">ifhp.conf</var> -
ifhp Options</b></p>
<table border="1" frame="border" rules="all" class=
"CALSTABLE">
<col>
<col>
<thead>
<tr>
<th>Option</th>
<th>Purpose</th>
</tr>
</thead>
<tbody>
<tr>
<td><a href="#MODELSELECTION"><var class=
"LITERAL">default</var></a></td>
<td>HP 4M Plus, PostScript, PJL, PCL, status,
pagecount support</td>
</tr>
<tr>
<td><a href="#APPSOCKET"><var class=
"LITERAL">appsocket FLAG</var></a></td>
<td>Use Tektronix AppSocket Protocol</td>
</tr>
<tr>
<td><a href="#CONFIG"><var class=
"LITERAL">config=PATHNAMES</var></a></td>
<td>Configuration file pathnames</td>
</tr>
<tr>
<td><a href="#CRLF"><var class="LITERAL">crlf
FLAG</var></a></td>
<td>Do LF to CRLF translation</td>
</tr>
<tr>
<td><a href="#CONFIG"><var class="LITERAL">debug
FLAG</var></a></td>
<td>Debugging level</td>
</tr>
<tr>
<td><a href="#CONVERSION"><var class=
"LITERAL">default_language=LANGUAGE</var></a></td>
<td>Default job file language (ps, pcl, raw, text,
etc)</td>
</tr>
<tr>
<td><a href="#PJLINIT"><var class=
"LITERAL">endpage=NNN</var></a></td>
<td>PJL JOB command END = NNN value</td>
</tr>
<tr>
<td><a href="#FILECONVERSION"><var class=
"LITERAL">forceconversion FLAG</var></a></td>
<td>Force conversion using UNIX file(1)
utility</td>
</tr>
<tr>
<td><a href="#CONVERSION"><var class=
"LITERAL">file_output_match=LIST</var></a></td>
<td>File type and conversion matching</td>
</tr>
<tr>
<td><a href="#FILE-UTIL-PATH"><var class=
"LITERAL">file_util_path=PATHNAME</var></a></td>
<td>Pathname of the UNIX file(1) utility</td>
</tr>
<tr>
<td><a href="#CONVERSION"><var class=
"LITERAL">language=LANGUAGE</var></a></td>
<td>Specify job file language to be used (ps, pcl,
raw, text, etc)</td>
</tr>
<tr>
<td><a href="#FILETRANSFER"><var class=
"LITERAL">logall FLAG</var></a></td>
<td>Log all status reports from printer if set</td>
</tr>
<tr>
<td><a href="#NULLPAD"><var class=
"LITERAL">nullpad=COUNT</var></a></td>
<td>Send COUNT nulls to force full buffer
condition</td>
</tr>
<tr>
<td><a href="#OPTIONS"><var class=
"LITERAL">model=NAME</var></a></td>
<td>Specify model name for configuration
selection</td>
</tr>
<tr>
<td><a href="#OPTIONS"><var class=
"LITERAL">model_from_option=X</var></a></td>
<td>Specify model name using a command line option
value</td>
</tr>
<tr>
<td><a href="#SYNCPAGE"><var class=
"LITERAL">pagecount=LANGUAGE</var></a></td>
<td>Get pagecount using pjl, ps or default</td>
</tr>
<tr>
<td><a href="#SYNCPAGE"><var class=
"LITERAL">pagecount_interval=SECONDS</var></a></td>
<td>Send pagecount command at SECONDS interval</td>
</tr>
<tr>
<td><a href="#SYNCPAGE"><var class=
"LITERAL">pagecount_ps_code=STRING</var></a></td>
<td>PostScript code to get pagecount
information</td>
</tr>
<tr>
<td><a href="#SYNCPAGE"><var class=
"LITERAL">pagecount_timeout=SECONDS</var></a></td>
<td>Timeout getting pagecount after SECONDS</td>
</tr>
<tr>
<td><a href="#LANGUAGES"><var class="LITERAL">pcl
FLAG</var></a></td>
<td>Printer supports PCL if set</td>
</tr>
<tr>
<td><a href="#PCL-EOJ-AT-START"><var class=
"LITERAL">pcl_eoj_at_start FLAG</var></a></td>
<td>PCL EOJ (CTRL-D) at start of job</td>
</tr>
<tr>
<td><a href="#LANGUAGEINIT"><var class=
"LITERAL">pcl_init=LIST</var></a></td>
<td>PCL initializations to be done</td>
</tr>
<tr>
<td><a href="#PCL-USER-OPTS"><var class=
"LITERAL">pcl_user_opts=LIST</var></a></td>
<td>User PCL options supported</td>
</tr>
<tr>
<td><a href="#LANGUAGES"><var class="LITERAL">pjl
FLAG</var></a></td>
<td>Printer supports PJL if set</td>
</tr>
<tr>
<td><a href="#FILETRANSFER"><var class=
"LITERAL">pjl_alert_codes=LIST</var></a></td>
<td>alert operator on these PJL error codes</td>
</tr>
<tr>
<td><a href="#FILETRANSFER"><var class=
"LITERAL">pjl_alert_handler=STRING</var></a></td>
<td>program to alert operator on PJL error</td>
</tr>
<tr>
<td><a href="#PJL-CONSOLE"><var class=
"LITERAL">pjl_console FLAG</var></a></td>
<td>Printer supports messages on console</td>
</tr>
<tr>
<td><a href="#FILETRANSFER"><var class=
"LITERAL">pjl_error_codes=LIST</var></a></td>
<td>PJL error messages for error codes</td>
</tr>
<tr>
<td><a href="#PJLINIT"><var class=
"LITERAL">pjl_except=LIST</var></a></td>
<td>Do not allow these PJL commands</td>
</tr>
<tr>
<td><a href="#PJLINIT"><var class=
"LITERAL">pjl_init=LIST</var></a></td>
<td>PJL initializations to be done</td>
</tr>
<tr>
<td><a href="#PJL-JOB"><var class="LITERAL">pjl_job
FLAG</var></a></td>
<td>PJL JOB and EOJ supported</td>
</tr>
<tr>
<td><a href="#PJLINIT"><var class=
"LITERAL">pjl_only=LIST</var></a></td>
<td>Allow only these PJL commands</td>
</tr>
<tr>
<td><a href="#FILETRANSFER"><var class=
"LITERAL">pjl_quiet_codes=LIST</var></a></td>
<td>ignore these PJL error codes</td>
</tr>
<tr>
<td><a href="#PJLINIT"><var class=
"LITERAL">pjl_user_opts=LIST</var></a></td>
<td>Allow only these user PJL commands or variables
to be set</td>
</tr>
<tr>
<td><a href="#PJLINIT"><var class=
"LITERAL">pjl_vars_except=LIST</var></a></td>
<td>Do not allow these PJL variables to be set</td>
</tr>
<tr>
<td><a href="#PJLINIT"><var class=
"LITERAL">pjl_vars_set=LIST</var></a></td>
<td>Allow these PJL variables to be set</td>
</tr>
<tr>
<td><a href="#LANGUAGES"><var class="LITERAL">ps
FLAG</var></a></td>
<td>Printer supports PostScript (ps)</td>
</tr>
<tr>
<td><a href="#PS-EOJ-AT-START"><var class=
"LITERAL">ps_eoj_at_start FLAG</var></a></td>
<td>PostScript EOJ (CTRL-D) at start of job</td>
</tr>
<tr>
<td><a href="#LANGUAGEINIT"><var class=
"LITERAL">ps_init=LIST</var></a></td>
<td>PS initializations to be done</td>
</tr>
<tr>
<td><a href="#PS-USER-OPTS"><var class=
"LITERAL">ps_user_opts=LIST</var></a></td>
<td>Support these PostScript user options</td>
</tr>
<tr>
<td><a href="#REMOVE-CTRL"><var class=
"LITERAL">remove_ctrl=LIST</var></a></td>
<td>Remove these characters from PostScript
jobs</td>
</tr>
<tr>
<td><a href="#REMOVE-PJL-AT-START"><var class=
"LITERAL">remove_pjl_at_start FLAG</var></a></td>
<td>Remove PJL commands from begining of job</td>
</tr>
<tr>
<td><a href="#PJLINIT"><var class=
"LITERAL">startpage=NNN</var></a></td>
<td>PJL JOB command START = NNN value</td>
</tr>
<tr>
<td><a href="#RWTIMEOUT"><var class=
"LITERAL">send_job_rw_timeout=NNN</var></a></td>
<td>Timeout for non-responding printer</td>
</tr>
<tr>
<td><a href="#STATUS"><var class="LITERAL">status
FLAG</var></a></td>
<td>Printer supplies status information</td>
</tr>
<tr>
<td><a href="#STATUSFILE"><var class=
"LITERAL">statusfile=PATHNAME</var></a></td>
<td>Status file pathname</td>
</tr>
<tr>
<td><a href="#STATUSFILE"><var class=
"LITERAL">statusfile_max=NNN</var></a></td>
<td>Status file has maximum size of NNN Kbytes</td>
</tr>
<tr>
<td><a href="#STATUSFILE"><var class=
"LITERAL">statusfile_min=NNN</var></a></td>
<td>Status file has truncated size of NNN
Kbytes</td>
</tr>
<tr>
<td><a href="#STATUSFILE"><var class=
"LITERAL">summaryfile=PATHNAME</var></a></td>
<td>Summary file pathname</td>
</tr>
<tr>
<td><a href="#SYNCPAGE"><var class="LITERAL">sync
FLAG</var></a></td>
<td>Synchronize printer if set</td>
</tr>
<tr>
<td><a href="#SYNCPAGE"><var class=
"LITERAL">sync_interval=SECONDS</var></a></td>
<td>Send synchronization request at SECONDS
interval</td>
</tr>
<tr>
<td><a href="#SYNCPAGE"><var class=
"LITERAL">sync_timeout=SECONDS</var></a></td>
<td>Timeout synchronization request after
SECONDS</td>
</tr>
<tr>
<td><a href="#TBCP"><var class="LITERAL">tbcp
FLAG</var></a></td>
<td>Use Transparent Binary Communications Protocol
for PostScript files</td>
</tr>
<tr>
<td><a href="#LANGUAGES"><var class="LITERAL">text
FLAG</var></a></td>
<td>Printer supports text mode</td>
</tr>
<tr>
<td><a href="#CONFIG"><var class="LITERAL">trace
FLAG</var></a></td>
<td>Put error and trace messages on STDERR if
set</td>
</tr>
<tr>
<td><a href="#WAITEND"><var class=
"LITERAL">waitend=METHOD</var></a></td>
<td>How to wait for printer to end printing</td>
</tr>
<tr>
<td><a href="#WAITEND"><var class=
"LITERAL">waitend_interval=SECONDS</var></a></td>
<td>How often to query printer for end of
printing</td>
</tr>
<tr>
<td><a href="#WAITEND"><var class=
"LITERAL">waitend_ctrl_t_interval=SECONDS</var></a></td>
<td>How often to send CTRL-T for end of printing
status</td>
</tr>
</tbody>
</table>
</div>
<br>
<br>
</div>
<div class="APPENDIX">
<hr>
<h1><a name="AEN4236"></a>Appendix B. HP JetDirect Card
Support</h1>
<p>The HPJetDirect card or external JetDirect box can be
configured through the printer front panel or through a set
of network files. Here is a summary of the methods used
from UNIX systems, or when you are desperate, to configure
the printer.</p>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN4239">B.1. MicroSoft
JetDirect Support</a></h2>
<p>There is limited support from HP for non-MicroSoft
configuration tools. However, the tools that are provided
are simple and easy to use, especially for the initial
configuration.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN4242">B.2. TCP/IP
Address</a></h2>
<p>You can set the TCP/IP address from the front panel.
Reset the printer and then use the MENU, +-, SELECT keys
as follows:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN4245"></a>
<pre class="SCREEN">
MENU -> MIO MENU (use MENU to display MIO MENU)
ITEM -> CFG NETWORK=NO*
+ -> CFG NETWORK=YES
ENTER -> CFG NETWORK=YES*
ITEM -> TCP/IP=OFF* (use ITEM to display TCP/IP)
+ -> TCP/IP=ON
ENTER -> TCP/IP=ON*
ITEM -> CFG TCP/IP=NO* (use ITEM to display TCP/IP)
+ -> CFG TCP/IP=YES
ENTER -> CFG TCP/IP=YES*
ITEM -> BOOTP=NO*
(Enable BOOTP if you want to - see below)
ITEM -> IP BYTE 1=0*
This is IP address MSB byte.
Use +- keys to change value, and then ENTER to change
Use ITEM keys to get IP BYTE=2,3,4
ITEM -> SM BYTE 1=255*
This is the subnet mask value
Use +- keys to change value, and then ENTER to change
Use ITEM keys to get IP BYTE=2,3,4
ITEM -> LG BYTE 1=255*
This is the Syslog server (LoGger) IP address
Use +- keys to change value, and then ENTER to change
Use ITEM keys to get IP BYTE=2,3,4
ITEM -> GW BYTE 1=255*
This is the subnet gateway (router) IP address
Use +- keys to change value, and then ENTER to change
Use ITEM keys to get IP BYTE=2,3,4
ITEM -> TIMEOUT=90
This is the connection timeout value. It puts a limit
on time between connections. A value of 10 is reasonable.
</pre>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN4247">B.3. Web Server
Configuration</a></h2>
<p>Many of the newer releases of HP JetDirect firmware
have a Web Server configuration capability.
Unfortunately, the web pages assume that you have
JavaScript support for the browser, and not all of the
facilities used are supported by all browsers. However
the configuration information and pages presented are
extremely simple to use and understand.</p>
<p>The major problem with the Web Server configuration is
that not all of the options can be set through the Web
Server pages.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN4251">B.4. Telnet
Configuration</a></h2>
<p>Once you have assigned an IP address to the JetDirect
Box you can telnet to the box and configure it through a
simple command line interface. When you first connect to
the box, hit <var class="LITERAL">RETURN</var> a couple
of times, followed by <var class="LITERAL">?</var>
(Question Mark) <var class="LITERAL">RETURN</var> and you
should get a simple help menu. This help information
usually scrolls off a small (25 line) screen so a buffer
that allows you to see all of the information is
advisable.</p>
<p>The major problem with the telnet configuration is
that not all of the options can be set through the
command line facilties.</p>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN4258">B.5. BOOTP
Information</a></h2>
<p>If you have a bootp server, you can put this
information in the bootptab file. To use this, you must
enable the bootp option on the printer. The T144 option
specifies a file to be read from the bootp server. This
file is read by using the TFTP protocol, and you must
have a TFTPD server enabled. Here is a sample bootptab
entry.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN4261"></a>
<pre class="SCREEN">
# Example /etc/bootptab: database for bootp server (/etc/bootpd).
# Blank lines and lines beginning with '#' are ignored.
#
# Legend:
#
# first field -- hostname
# (may be full domain name)
#
# hd -- home directory
# bf -- bootfile
# cs -- cookie servers
# ds -- domain name servers
# gw -- gateways
# ha -- hardware address
# ht -- hardware type
# im -- impress servers
# ip -- host IP address
# lg -- log servers
# lp -- LPR servers
# ns -- IEN-116 name servers
# rl -- resource location protocol servers
# sm -- subnet mask
# tc -- template host (points to similar host entry)
# to -- time offset (seconds)
# ts -- time servers
#
# Be careful about including backslashes where they're needed. Weird (bad)
# things can happen when a backslash is omitted where one is intended.
#
peripheral1:
:hn:ht=ether:vm=rfc1048:
:ha=08000903212F:
:ip=190.40.101.22:
:sm=255.255.255.0:
:gw=190.40.101.1:
:lg=190.40.101.3:
:T144="hpnp/peripheral1.cfg":
</pre>
</div>
<br>
<br>
<p>If you are using the T144 option, you will need to
create the configuration file. The sample configuration
file from the HP Direct distribution is included
below.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN4264"></a>
<pre class="SCREEN">
#
# Example HP Network Peripheral Interface configuration file
#
# Comments begin with '#' and end at the end of the line.
# Blank lines are ignored. Entries cannot span lines.
# Name is the peripheral (or node) name. It is displayed on the peripheral's
# self-test page or configuration plot, and when sysName is obtained through
# SNMP. This name can be provided in the BOOTP response or can be specified
# in the NPI configuration file to prevent the BOOTP response from overflowing
# the packet. The domain portion of the name is not necessary because the
# peripheral does not perform Domain Name System (DNS) searches. Name is
# limited to 64 characters.
name: picasso
# Location describes the physical location of the peripheral. This is the
# value used by the interface for the MIB-II sysLocation object. The default
# location is undefined. Only printable ASCII characters are allowed.
# Maximum length is 64 characters.
location: 1st floor, south wall
# Contact is the name of the person who administers or services the peripheral
# and may include how to contact this person. It is limited to 64 characters.
# This is the value used by the interface for the MIB-II sysContact object.
# The default contact is undefined. Only printable ASCII characters are
# allowed. Maximum length is 64 characters.
contact: Phil, ext 1234
# The host access list contains the list of hosts or networks of hosts
# that are allowed to connect to the peripheral. The format is
# "allow: netnum [mask]", where netnum is a network number or a host IP
# address. Mask is an address mask of bits to apply to the network number
# and connecting host's IP address to verify access to the peripheral.
# The mask usually matches the network or subnet mask, but this is not
# required. If netnum is a host IP address, the mask 255.255.255.255 can
# be omitted. Up to ten access list entries are permitted.
# to allow all of network 10 to access the peripheral:
allow: 10.0.0.0 255.0.0.0
# to allow a single host without specifying the mask:
allow: 15.1.2.3
# Idle timeout is the time (in seconds) after which an idle
# print data connection is closed. A value of zero disables
# the timeout mechanism. The default timeout is 90 seconds.
idle-timeout: 120
# A community name is a password that allows SNMP access to MIB values on
# the network peripheral. Community names are not highly secure; they are
# not encrypted across the network. The get community name determines which
# SNMP GetRequests are responded to. By default, the network peripheral
# responds to all GetRequests. The get community name is limited to 32
# characters.
#
# For hpnpstat and hpnpadmin, the community name can be stored in
# /usr/lib/hpnp/hpnpsnmp.
get-community-name: blue
# The set community name is similar to the get community name. The set
# community name determines which SNMP SetRequests are responded to. In
# addition, SetRequests are only honored if the sending host is on the
# host access list. By default, the network peripheral does not respond
# to any SetRequests. The set community name is limited to 32 characters.
#
# The set community name can come from /usr/lib/hpnp/hpnpsnmp
# if it is the same as the get community name. We recommend that the
# set community name be different from the get community name though.
set-community-name: yellow
# SNMP traps are asynchronous notifications of some event that has occurred.
# SNMP traps are useful only with network management software. Traps are
# sent to specific hosts and include a trap community name. Up to four
# hosts can be sent SNMP traps. The trap community name is limited to
# 32 characters. The default name is public.
trap-community-name: red
# The SNMP trap destination list specifies systems to which SNMP
# traps are sent. Up to four IP addresses are allowed. If no
# trap destinations are listed, traps are not sent.
trap-dest: 15.1.2.3
trap-dest: 15.2.3.4
# The SNMP authentication trap parameter enables or disables the sending
# of SNMP authentication traps. Authentication traps indicate that an SNMP
# request was received and the community name check failed. By default,
# the parameter is off.
authentication-trap: on
# The syslog-facility parameter sets the source facility identifier that the
# card uses when issuing syslog messages. Other facilities, for example,
# include the kernel (LOG_KERN), the mail system (LOG_MAIL), and the spooling
# system (LOG_LPR). The card only allows its syslog facility to be configured
# to one of the local user values (LOG_LOCAL0 through LOG_LOCAL7). The
# selectable option strings, local0 through local7 (configured to LOG_LOCAL0
# through LOG_LOCAL7, respectively) are case insensitive. The default
# syslog-facility for the card is LOG_LPR.
syslog-facility: local2
# This parameter allows the card to treat hosts on other subnets as if the
# hosts were on the card's subnet. This parameter determines the TCP
# Maximum Segment Size (MSS) advertised by the card to hosts on other subnets
# and affects the card's initial receive-window size. The card will use a
# TCP MSS of 1460 bytes for local hosts, and 536 bytes for a non-local host.
# The default is off, that is, the card will use the maximum packet sizes
# only on the card's configured subnet.
#
# The configuration utility does not allow access to this parameter. If you
# want to configure it, you must manually edit the NPI configuration file
# and add it to the bottom of the entry for the network peripheral.
subnets-local: on
# This parameter affects how the card handles TCP connection requests from
# the host. By default, the JetDirect MPS card will accept a TCP connection
# even if the peripheral is off-line. If this parameter is set to "on", then
# the card will only accept a TCP connection when the peripheral is on-line.
old-idle-mode: off
</pre>
</div>
<br>
<br>
</div>
<div class="SECT1">
<hr>
<h2 class="SECT1"><a name="AEN4266">B.6.
Timeouts</a></h2>
<p>You should be aware that the <var class=
"LITERAL">idle-timeout</var> value in the configuration
file will override the value entered on the control panel
of the printer.</p>
<p>Also, the <var class="LITERAL">@PJL SET TIMEOUT =
NNN</var> command will override this value as well.</p>
</div>
</div>
</div>
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