.\" Use default p.i., so commented out here and in .TP
.\" .nr oi 16 \" Prevailing indentation for options' .TP request
.\" .de Sp
.\" .if n .sp
.\" .if t .sp 0.4
.\" ..
.TH LOUT 1
.SH NAME
lout - prepare Lout document for printing
.SH SYNOPSIS
\fBlout\fR [ \fIoptions\fR ] \fIfile\fR...
.SH DESCRIPTION
Invoke the Basser Lout interpreter on the concatenation of the named
files, producing a PostScript file on standard output suitable for
printing on PostScript printers using
.IR lpr (1).
If no files are named, stdin is used instead.  The special file name
.RB ` \|\-\| '
may be used to denote standard input.  White space between flags
and their associated option values is optional.
.LP
An optional
.B .lt
suffix may be used for Lout source and include files.  When invoking
files ending in this suffix the suffix may be omitted.
.SH OPTIONS
.SS Output
.TP \" \n(oi
.BI \-o " filename"
Direct output to
.I filename
instead of to stdout.
.TP
.BI \-e " filename"
Direct error messages to
.I filename
instead of to stderr.
.TP
.B \-a
Use "\c
.IR filename :\c
.IR linenum :\c
.IR colnum :\c
.I message\c
\&" alternative error message format (useful with Emacs compilation
mode and other tools).
.SS Output format
.TP \" \n(oi
.B \-EPS
Produce output in the form of an EPS (Encapsulated PostScript) file,
suitable for inclusion in another document.  Useful with stand-alone
illustrations.
.TP
.B \-p
Produce plain text output instead of PostScript.
.TP
.B \-P
Like
.BR \-p ,
but with a form-feed character between pages.
.TP
.B \-Z
Produce Adobe Portable Document Format (PDF) output.  This includes
links, but the more advanced graphics packages of Lout are not supported.
.TP
.B \-PDF
Synonym for
.BR \-Z .
.SS Cross-reference database
.TP \" \n(oi
.B \-s
Suppress all reading and writing of the cross reference database;
other databases are not affected.  Useful when many simple documents
that don't do any cross referencing are stored in one directory.
.TP
.B \-l
Use ASCII order when sorting index entries etc.; the default depends on
the COLLATE compilation option (use
.B \-V
option to find out your default value).
.TP
.B \-L
Use your locale's order when sorting index entries etc.; the default
depends on the COLLATE compilation option (use
.B \-V
option to find out your default value).
.SS Execution of filters
.TP \" \n(oi
.B \-S
Safe execution: disable all calls to
.IR system (3),
instead echoing the commands that would have been executed.  Although
this makes the Lout run certainly safe, the PostScript output file may
not be.

Note from the Debian package maintainer: in this version of lout,
compiled for Debian GNU/Linux, safe execution has been made the
default.  Use -U to enable unsafe execution.
.TP
.B \-U
Unsafe execution: allow calls to
.IR system (3).
This is usually the default behavior, but it is possible to make safe
execution the default during installation (use
.B \-V
option to find out whether this was done or not), hence the need for
this flag.
.SS Changing document setup options
.TP \" \n(oi
.BI \-\- option { value }
Set setup file
.I option
to
.IR value ,
overriding any value assigned to
.I option
in the setup file.  For example,
.B \-\-@PageType{Letter}
will set the
.B @PageType
setup file option to
.BR  Letter .
The value may be a sequence of words but not an arbitrary Lout object.
If there are spaces you must ensure that it is passed to Lout as a
single option; the usual way to do this is to enclose it in quotes.
.SS Searching for files
.TP \" \n(oi
.BI \-i " filename"
Search the directories of the include file path (see below) for
.I filename
or
.IR filename .lt
and include it.  There may be multiple
.B \-i
options.
.TP
.BI \-I " dirname"
Add
.I dirname
to the list of directories searched for
.B @Include
files and
.B \-i
option files.
There may be multiple
.B \-I
options.
.B @Include
first searches the current directory, then searches the
.B \-I
directories in the order given, and finally searches the default
include file directory (see below).
.B @SysInclude
and the
.B \-i
option omit the search of the current directory.
.TP
.BI \-C " dirname"
Add
.I dirname
to the list of directories searched for Lout character mapping (\c
.BR .LCM )
files.
There may be multiple
.B \-C
options; the directories are searched in the order given, and finally
the default character mappings directory is searched (see below).
.TP
.BI -F " dirname"
Add
.I dirname
to the list of directories searched for font metrics (formerly
.BR .AFM )
files.  There may be multiple
.B \-F
options; the directories are searched in the order given, and finally
the default font metrics directory is searched (see below).
.TP
.BI \-H " dirname"
Add
.I dirname
to the list of directories searched for hyphenation patterns files,
both unpacked
.RB ( .lh )
and packed
.RB ( .lp ).
There may be multiple
.B \-H
options; the directories are searched in the order given, and finally
the default hyphenation directory is searched (see below).
.TP
.BI -D " dirname"
Add
.I dirname
to the list of directories searched for Lout database files.  There
may be multiple
.B \-D
options.
.B @Database
searches the current directory, then the
.B \-D
directories in the order given, and finally searches the default
databases directory (see below).
.B @SysDatabase
omits the search of the current directory.
.SS Miscellaneous options
.TP \" \n(oi
.B \-x
Initializing run, not for ordinary use: read and check all font files
mentioned in font definitions, read and check all hyphenation files
mentioned in language definitions and build compressed versions, read
and check all database files mentioned in database clauses and build
index files.
.TP
.B \-u
Print usage information on stderr and exit.
.TP
.B \-V
Print version information on stderr and exit.
.TP
.B \-M
Use less memory and run more slowly (the cross reference database index
will be kept in a file rather than in memory).
.TP
.B \-w
Show the total number of non-empty words printed in the output file.
This includes words and numbers in page headers and footers; section
numbers and other numbers; every punctuation character in a font
different from its adjacent word; and every little fragment of every
equation; so it will always somewhat overestimate the true number.
.SH FILES AND ENVIRONMENT VARIABLE
.LP
.\" NB: be careful with tabs in the table below
.nf
.ta \w'Default character mappings dir.:  'u
\&Default include file directory:	\fILOUTLIB\fP/include
\&Default databases directory:	\fILOUTLIB\fP/data
\&Default font metrics directory:	\fILOUTLIB\fP/font
\&Default hyphenation directory:	\fILOUTLIB\fP/hyph
\&Default character mappings dir.:	\fILOUTLIB\fP/maps
\&Default locales directory:	\fILOUTLIB\fP/locale
.fi
.LP
The default library directory, usually
.BR /usr/local/lib/lout ,
can be changed by setting environment variable
.SB LOUTLIB
to an alternative directory name.
.SH SEE ALSO
.LP
.BR prg2lout (1),
.BR lpr (1),
.BR ghostview (1)
.SH MAILING LIST
.LP
A public mailing list for discussion of Lout exists.  To subscribe,
mail
.B lout\-request@ptc.spbu.ru
with the word
.B subscribe
in the Subject line.  To post an item, mail it to
.BR lout@ptc.spbu.ru .
.SH REFERENCES
.LP
Jeffrey H. Kingston,
.I 
\(lq\&A User's Guide to the Lout Document Formatting System\(rq\c
\&, and
.I
\(lq\&An Expert's Guide to the Lout Document Formatting System\(rq\c
\&.
.SH AUTHOR
.LP
Jeffrey H. Kingston