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<th colspan="3" align="center">LPRng Reference Manual: 24
Sep 2004 (For LPRng-3.8.28)</th>
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<h1 class="SECT1"><a name="LPSIMULATION">2.11. Emulation for
UNIX SystemV <b class="APPLICATION">lp</b> and <b class=
"APPLICATION">lpstat</b></a></h1>
<p>Many utilities in the UNIX System V environment require
the <b class="APPLICATION">lp</b>, <b class=
"APPLICATION">lpstat</b>, and <b class=
"APPLICATION">cancel</b> programs. It is almost impossible to
modify these utilities, as many are <span class="emphasis"><i
class="EMPHASIS">vintage</i></span> software which is
unsupported or which would be too costly to update. In order
to support these applications <b class=
"APPLICATION">LPRng</b> emulates the <b class=
"APPLICATION">lp</b>, <b class="APPLICATION">lpstat</b>, and
<b class="APPLICATION">clean</b> programs. See the <b class=
"APPLICATION">LPRng</b> man pages for <b class=
"APPLICATION">lp</b>, <b class="APPLICATION">lpstat</b>, and
<b class="APPLICATION">cancel</b> in the <b class=
"APPLICATION">LPRng</b> distribution for details and
compatibility.</p>
<p>The <b class="APPLICATION">LPRng</b> <b class=
"APPLICATION">lpstat</b> emulator accepts the <b class=
"APPLICATION">lpstat</b> command line options returns status
in a format that is close to the one that common <b class=
"APPLICATION">lpstat</b> implementations return.
Unfortunately, due to the wide variety of different
modifications and vendor versions of <b class=
"APPLICATION">lpstat</b> there are slight differences between
the this status and the status returned by the original <b
class="APPLICATION">lpstat</b>. If this is the case, then
there is little to do but to modify the source code for <b
class="APPLICATION">lpstat</b> and compile a version that
implements the required format.</p>
<p>If the <b class="APPLICATION">lpr</b> program is invoked
with the name <b class="APPLICATION">lp</b>, it will simulate
the <b class="APPLICATION">lp</b> options. This can be done
by making a symbolic link to the <b class=
"APPLICATION">lpr</b> program or by making a copy of the <b
class="APPLICATION">lpr</b> program with the name <b class=
"APPLICATION">lp</b>.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN1338"></a>
<pre class="SCREEN">
<samp class="PROMPT">h4: {59} #</samp> <kbd class=
"USERINPUT">cd /usr/bin</kbd>
<samp class="PROMPT">h4: {60} #</samp> <kbd class=
"USERINPUT">ln -s lpr lp</kbd>
<samp class="PROMPT">h4: {61} #</samp> <kbd class=
"USERINPUT">lp /tmp/hi</kbd>
request id is root@h4+489
</pre>
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<br>
<br>
<p>Finally, if the <b class="APPLICATION">lprm</b> program is
invoked with the name <b class="APPLICATION">cancel</b> it
will simulate the <b class="APPLICATION">cancel</b> command.
This can be done by making a symbolic link to the <b class=
"APPLICATION">lprm</b> program or by making a copy of the <b
class="APPLICATION">lprm</b> program with the name <b class=
"APPLICATION">cancel</b>.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN1353"></a>
<pre class="SCREEN">
<samp class="PROMPT">h4: {62} #</samp> <kbd class=
"USERINPUT">cd /usr/bin</kbd>
<samp class="PROMPT">h4: {63} #</samp> <kbd class=
"USERINPUT">ln -s lprm cancel</kbd>
<samp class="PROMPT">h4: {64} #</samp> <kbd class=
"USERINPUT">cancel 489</kbd>
cancel 513
Printer lp@h9:
checking perms 'root@h9+513'
dequeued 'root@h9+513'
</pre>
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<br>
<br>
<p>Many <span class="emphasis"><i class=
"EMPHASIS">vintage</i></span> or <span class="emphasis"><i
class="EMPHASIS">legacy</i></span> applications have fully
qualified paths to the <b class="APPLICATION">lp</b> and <b
class="APPLICATION">lpstat</b> executables, and it may be
necessary to make additional symbolic links or copies of the
<b class="APPLICATION">LPRng</b> executables to satisfy their
pathname requirements.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN1367"></a>
<pre class="SCREEN">
<samp class="PROMPT">h4: {65} #</samp> <kbd class=
"USERINPUT">ln -s /usr/bin/lpr /usr/ucb/lpr</kbd>
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