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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="AEN3470" id="AEN3470">4.15. Print
Job Classes, User Requested Job Priority, and Form
Support</a></h1>
<p>The <b class="APPLICATION">LPRng</b> software allows users
to assign a class name to print jobs using the <tt class=
"COMMAND">lpr -Cname</tt> option. This causes the <b class=
"APPLICATION">lpr</b> command to put the line <tt class=
"LITERAL">Cname</tt> in the control file. By default, the
(upper cased) first letter of the class name is used to assign
a user requested priority to the job, with <tt class=
"LITERAL">A</tt> being the default lowest priority and
<tt class="LITERAL">Z</tt> being the highest.</p>
<p>The <tt class="LITERAL">ignore_requested_user_priority</tt>
printcap option can be used to ignore the user requested
priority and jobs will be printed in the normal first-in
first-out order.</p>
<p><b class="APPLICATION">LPRng</b> also makes use of the class
information to do form support and restrict printing to a
specific set of classes. By default the job class information
is ignored, but the <tt class="COMMAND">lpc class</tt> command
can be used to specify one or more classes (actually glob
patterns) to be printed. This facility can be used to do
support printing of jobs that require a specific form setup.
Here is a simple example of how to use this facility.</p>
<p>Edit the printcap file so it has contents indicated below,
use <tt class="COMMAND">checkpc -f</tt> to check the printcap,
and then use <tt class="COMMAND">lpc reread</tt> to restart the
<b class="APPLICATION">lpd</b> server.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3488" id="AEN3488"></a>
<pre class="SCREEN">
lp:force_localhost
lp:server
:sd=/var/spool/lpd/%P
:lp=lp2@localhost
lp2:force_localhost
lp2:server
:sd=/var/spool/lpd/%P
:lp=/tmp/lp2
</pre>
</div>Execute the following commands to print the <tt class=
"FILENAME">/tmp/hi</tt> file and observe the results:
<div class="INFORMALEXAMPLE">
<a name="AEN3491" id="AEN3491"></a>
<pre class="SCREEN">
<samp class="PROMPT">h4: {249} % </samp><kbd class=
"USERINPUT">lpc class lp red</kbd>
Printer: lp@h4
classes printed 'red'
lp@h4.private: class updated
<samp class="PROMPT">h4: {250} % </samp><kbd class=
"USERINPUT">lpq</kbd>
Printer: lp@h4 (classes red)
Queue: no printable jobs in queue
<samp class="PROMPT">h4: {251} % </samp><kbd class=
"USERINPUT">lpr /tmp/hi</kbd>
<samp class="PROMPT">h4: {252} % </samp><kbd class=
"USERINPUT">lpq</kbd>
Printer: lp@h4 (classes red)
Queue: no printable jobs in queue
Holding: 1 held jobs in queue
Server: no server active
Rank Owner/ID Class Job Files Size Time
holdclass papowell@h4+82 A 82 /tmp/hi 3 09:29:52
<samp class="PROMPT">h4: {253} % </samp><kbd class=
"USERINPUT">lpr -Cred /tmp/hi</kbd>
<samp class="PROMPT">h4: {254} % </samp><kbd class=
"USERINPUT">lpq</kbd>
Printer: lp@h4 (classes red)
Queue: no printable jobs in queue
Holding: 1 held jobs in queue
Server: no server active
Status: job 'papowell@h4+89' removed at 09:30:13.569
Rank Owner/ID Class Job Files Size Time
holdclass papowell@h4+82 A 82 /tmp/hi 3 09:29:52
</pre>
</div>
<p>As seen in the example, we set the queue class to <tt class=
"LITERAL">red</tt>, and then sent a (default) class <tt class=
"LITERAL">A</tt> job to the printer. It was not printed, and is
listed with <tt class="LITERAL">holdclass</tt> status. We sent
another job which was immediately printed.</p>
<p>We can change the print queue class at any time, and then
new class will then control what jobs are printed. To disable
the class selection, use the <tt class="COMMAND">lpc class
queue off</tt> command.</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3511" id="AEN3511"></a>
<pre class="SCREEN">
<samp class="PROMPT">h4: {255} % </samp><kbd class=
"USERINPUT">lpc class lp off</kbd>
Printer: lp@h4
all classes printed
lp@h4.private: class updated
</pre>
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