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            <h1>vmsish</h1>


  <!--    -->
<ul><li><a href="#NAME">NAME</a><li><a href="#SYNOPSIS">SYNOPSIS</a><li><a href="#DESCRIPTION">DESCRIPTION</a></ul><a name="NAME"></a><h1>NAME</h1>
<p>vmsish - Perl pragma to control VMS-specific language features</p>
<a name="SYNOPSIS"></a><h1>SYNOPSIS</h1>
<pre class="verbatim"><ol><li>    <a class="l_k" href="functions/use.html">use</a> <span class="w">vmsish</span><span class="sc">;</span></li><li></li><li>    <a class="l_k" href="functions/use.html">use</a> <span class="w">vmsish</span> <span class="q">&#39;status&#39;</span><span class="sc">;</span>	<span class="c"># or &#39;$?&#39;</span></li><li>    <a class="l_k" href="functions/use.html">use</a> <span class="w">vmsish</span> <span class="q">&#39;exit&#39;</span><span class="sc">;</span></li><li>    <a class="l_k" href="functions/use.html">use</a> <span class="w">vmsish</span> <span class="q">&#39;time&#39;</span><span class="sc">;</span></li><li></li><li>    <a class="l_k" href="functions/use.html">use</a> <span class="w">vmsish</span> <span class="q">&#39;hushed&#39;</span><span class="sc">;</span></li><li>    <a class="l_k" href="functions/no.html">no</a> <span class="w">vmsish</span> <span class="q">&#39;hushed&#39;</span><span class="sc">;</span></li><li>    <span class="i">vmsish::hushed</span><span class="s">(</span><span class="i">$hush</span><span class="s">)</span><span class="sc">;</span></li><li></li><li>    <a class="l_k" href="functions/use.html">use</a> <span class="w">vmsish</span><span class="sc">;</span></li><li>    <a class="l_k" href="functions/no.html">no</a> <span class="w">vmsish</span> <span class="q">&#39;time&#39;</span><span class="sc">;</span></li></ol></pre><a name="DESCRIPTION"></a><h1>DESCRIPTION</h1>
<p>If no import list is supplied, all possible VMS-specific features are
assumed.  Currently, there are four VMS-specific features available:
'status' (a.k.a '$?'), 'exit', 'time' and 'hushed'.</p>
<p>If you're not running VMS, this module does nothing.</p>
<ul>
<li><a name="vmsish-status"></a><b><code class="inline"><span class="w">vmsish</span> <span class="w">status</span></code>
</b>
<p>This makes <code class="inline"><span class="i">$?</span></code>
 and <code class="inline"><a class="l_k" href="functions/system.html">system</a></code> return the native VMS exit status
instead of emulating the POSIX exit status.</p>
</li>
<li><a name="vmsish-exit"></a><b><code class="inline"><span class="w">vmsish</span> <a class="l_k" href="functions/exit.html">exit</a></code>
</b>
<p>This makes <code class="inline"><a class="l_k" href="functions/exit.html">exit</a> <span class="n">1</span></code>
 produce a successful exit (with status SS$_NORMAL),
instead of emulating UNIX exit(), which considers <code class="inline"><a class="l_k" href="functions/exit.html">exit</a> <span class="n">1</span></code>
 to indicate
an error.  As with the CRTL's exit() function, <code class="inline"><a class="l_k" href="functions/exit.html">exit</a> <span class="n">0</span></code>
 is also mapped
to an exit status of SS$_NORMAL, and any other argument to exit() is
used directly as Perl's exit status.</p>
</li>
<li><a name="vmsish-time"></a><b><code class="inline"><span class="w">vmsish</span> <a class="l_k" href="functions/time.html">time</a></code>
</b>
<p>This makes all times relative to the local time zone, instead of the
default of Universal Time (a.k.a Greenwich Mean Time, or GMT).</p>
</li>
<li><a name="vmsish-hushed"></a><b><code class="inline"><span class="w">vmsish</span> <span class="w">hushed</span></code>
</b>
<p>This suppresses printing of VMS status messages to SYS$OUTPUT and
SYS$ERROR if Perl terminates with an error status, and allows
programs that are expecting "unix-style" Perl to avoid having to parse
VMS error messages.  It does not suppress any messages from Perl
itself, just the messages generated by DCL after Perl exits.  The DCL
symbol $STATUS will still have the termination status, but with a
high-order bit set:</p>
<p>EXAMPLE:
    $ perl -e"exit 44;"                          Non-hushed error exit
    %SYSTEM-F-ABORT, abort                       DCL message
    $ show sym $STATUS
      $STATUS == "%X0000002C"</p>
<pre class="verbatim"><ol><li>    <span class="i">$ perl</span> -<span class="w">e</span><span class="q">&quot;use vmsish qw(hushed); exit 44;&quot;</span>   <span class="w">Hushed</span> <span class="w">error</span> <a class="l_k" href="functions/exit.html">exit</a></li><li>    <span class="i">$ show</span> <span class="w">sym</span> <span class="i">$STATUS</span></li><li>      <span class="i">$STATUS</span> == <span class="q">&quot;%X1000002C&quot;</span></li></ol></pre><p>The 'hushed' flag has a global scope during compilation: the exit() or
die() commands that are compiled after 'vmsish hushed' will be hushed
when they are executed.  Doing a "no vmsish 'hushed'" turns off the
hushed flag.</p>
<p>The status of the hushed flag also affects output of VMS error
messages from compilation errors.   Again, you still get the Perl
error message (and the code in $STATUS)</p>
<p>EXAMPLE:
    use vmsish 'hushed';    # turn on hushed flag
    use Carp;          # Carp compiled hushed
    exit 44;           # will be hushed
    croak('I die');    # will be hushed
    no vmsish 'hushed';     # turn off hushed flag
    exit 44;           # will not be hushed
    croak('I die2'):   # WILL be hushed, croak was compiled hushed</p>
<p>You can also control the 'hushed' flag at run-time, using the built-in
routine vmsish::hushed().  Without argument, it returns the hushed status.
Since vmsish::hushed is built-in, you do not need to "use vmsish" to call
it.</p>
<p>EXAMPLE:
    if ($quiet_exit) {
        vmsish::hushed(1);
    } 
    print "Sssshhhh...I'm hushed...\n" if vmsish::hushed();
    exit 44;</p>
<p>Note that an exit() or die() that is compiled 'hushed' because of "use
vmsish" is not un-hushed by calling vmsish::hushed(0) at runtime.</p>
<p>The messages from error exits from inside the Perl core are generally
more serious, and are not suppressed.</p>
</li>
</ul>
<p>See <a href="perlmod.html#Perl-Modules">Perl Modules in perlmod</a>.</p>




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