<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta name="generator" content="HTML Tidy, see www.w3.org">
<title>Routing Jobs To Print Queues</title>
<meta name="GENERATOR" content=
"Modular DocBook HTML Stylesheet Version 1.7">
<link rel="HOME" title=" LPRng Reference Manual" href=
"index.htm">
<link rel="UP" title="Print Spooling Tutorial " href=
"tutorial.htm">
<link rel="PREVIOUS" title=
"Load Balance Queues and Printer Pools" href="x3595.htm">
<link rel="NEXT" title=
"Job Options and the Z Control File Entry" href="x3774.htm">
</head>
<body class="SECT1" bgcolor="#FFFFFF" text="#000000" link=
"#0000FF" vlink="#840084" alink="#0000FF">
<div class="NAVHEADER">
<table summary="Header navigation table" width="100%" border=
"0" cellpadding="0" cellspacing="0">
<tr>
<th colspan="3" align="center">LPRng Reference Manual: 24
Sep 2004 (For LPRng-3.8.28)</th>
</tr>
<tr>
<td width="10%" align="left" valign="bottom"><a href=
"x3595.htm" accesskey="P">Prev</a></td>
<td width="80%" align="center" valign="bottom">Chapter 4.
Print Spooling Tutorial</td>
<td width="10%" align="right" valign="bottom"><a href=
"x3774.htm" accesskey="N">Next</a></td>
</tr>
</table>
<hr align="LEFT" width="100%">
</div>
<div class="SECT1">
<h1 class="SECT1"><a name="AEN3701">4.18. Routing Jobs To
Print Queues</a></h1>
<p>A <span class="emphasis"><i class="EMPHASIS">routing
queue</i></span> is similar in concept to a load balance
queue in that it transfers a job to a (different) print
queue, but the job destination is chosen at the time the job
is submitted to the queue rather than at the time the job is
removed from the queue. A routing queue can modify the job
control file, multiple copies of the same job can be sent to
the same or different printers, and the job can be held,
rejected, or processed immediately.</p>
<p>Edit the printcap file so it have the contents indicated
below, create the <tt class="FILENAME">/tmp/lp2</tt> and <tt
class="FILENAME">/tmp/lp3</tt> files with <var class=
"LITERAL">0777</var> permissions. Create the <tt class=
"FILENAME">/tmp/router.script</tt> with the contents
indicated below, and give it <var class="LITERAL">0755</var>
(executable) permissions. 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="AEN3714"></a>
<pre class="SCREEN">
# printcap
lp:force_localhost
lp:server
:lp=/dev/null
:sd=/var/spool/lpd/%P
:router=/tmp/router.script
lp2:force_localhost
lp2:server
:sd=/var/spool/lpd/%P
:lp=/tmp/lp2
lp3:force_localhost
lp3:server
:sd=/var/spool/lpd/%P
:lp=/tmp/lp2
# /tmp/router.script
#!/bin/sh
/bin/cat <<EOF
dest lp2
copies 2
Cred
end
dest lp3
end
EOF
exit 0
</pre>
</div>
<br>
<br>
<p>The <tt class="FILENAME">router.script</tt> will write the
routing information to its <acronym class=
"ACRONYM">STDOUT</acronym>. For our example, we want the
destination <var class="LITERAL">lp2</var> to get two copies
of the job and we want to change the class to <var class=
"LITERAL">red</var>. Now run the following commands:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3721"></a>
<pre class="SCREEN">
<samp class="PROMPT">h4: {282} %</samp> <kbd class=
"USERINPUT">lpc stop all</kbd>
Printer: lp@h4
lp@h4.private: stopped
Printer: lp2@h4
lp2@h4.private: stopped
Printer: lp3@h4
lp3@h4.private: stopped
<samp class="PROMPT">h4: {283} %</samp> <kbd class=
"USERINPUT">lpq</kbd>
Printer: lp@h4 (dest lp@localhost) (printing disabled) (dest lp2, lp3)
Queue: no printable jobs in queue
Printer: lp2@h4 (printing disabled)
Queue: no printable jobs in queue
Printer: lp3@h4 (printing disabled)
Queue: no printable jobs in queue
<samp class="PROMPT">h4: {284} %</samp> <kbd class=
"USERINPUT">lpr /tmp/hi</kbd>
<samp class="PROMPT">h4: {285} %</samp> <kbd class=
"USERINPUT">lpq</kbd>
Printer: lp@h4 (dest lp@localhost) (printing disabled) (dest lp2, lp3)
Queue: 1 printable job
Server: no server active
Rank Owner/ID Class Job Files Size Time
1 papowell@h4+235 A 235 /tmp/hi 3 16:14:22
- papowell@h4+235.1 ->lp2 <cpy 0/2>
- papowell@h4+235.2 ->lp3
Printer: lp2@h4 (printing disabled)
Queue: no printable jobs in queue
Printer: lp3@h4 (printing disabled)
Queue: no printable jobs in queue
</pre>
</div>
<br>
<br>
<p>The status reported for the spooled job indicates that the
job is routed to <var class="LITERAL">lp2</var>, and that two
copies will be sent. The <var class=
"LITERAL">:destinations</var> option in the printcap entry
causes <b class="APPLICATION">lpq</b> to display the contents
of the specified queues. Now execute the following
commands:</p>
<div class="INFORMALEXAMPLE">
<a name="AEN3735"></a>
<pre class="SCREEN">
<samp class="PROMPT">h4: {286} %</samp> <kbd class=
"USERINPUT">lpc start</kbd>
Printer: lp@h4
lp@h4.private: started
<samp class="PROMPT">h4: {287} %</samp> <kbd class=
"USERINPUT">lpq</kbd>
Printer: lp@h4 (dest lp@localhost) (destinations lp2, lp3)
Queue: no printable jobs in queue
Status: job 'papowell@h4+235' removed at 16:14:37.491
Printer: lp2@h4 (printing disabled)
Queue: 2 printable jobs
Server: no server active
Rank Owner/ID Class Job Files Size Time
1 papowell@h4+235.1C1 A 235 /tmp/hi 3 16:14:36
2 papowell@h4+235.1C2 A 236 /tmp/hi 3 16:14:37
Printer: lp3@h4 (printing disabled)
Queue: 1 printable job
Server: no server active
Rank Owner/ID Class Job Files Size Time
1 papowell@h4+235.2 A 237 /tmp/hi 3 16:14:37
<samp class="PROMPT">h4: {288} %</samp> <kbd class=
"USERINPUT">more /var/spool/lpd/lp2/cfA235*</kbd>
Hh4.private
Ppapowell
J/tmp/hi
Cred
Lpapowell
Apapowell@h4+235.1C1
D2000-06-01-16:03:25.237
Qlp
N/tmp/hi
fdfA235h4.private
UdfA235h4.private
</pre>
</div>
<br>
<br>
<p>As you can see, two copies of the job has been transferred
to <var class="LITERAL">lp2</var> and one to <var class=
"LITERAL">lp3</var>, each with a different job number, If we
examine the control file for the jobs in the <var class=
"LITERAL">lp2</var> spool queue, we will find that the <var
class="LITERAL">C</var> or class information has been changed
to <var class="LITERAL">red</var>.</p>
<p>For details about all of the capabilities of the routing
filter, see <a href="destinations.htm">Dynamic Routing</a>.
Here is a summary of the information that the routing filter
can put into the routing file.</p>
<div class="VARIABLELIST">
<dl>
<dt>dest queue</dt>
<dd>
<p>Route this job to <var class="LITERAL">queue</var>.
The <var class="LITERAL">queue@host</var> form will
transfer the job to the queue on the named host.</p>
</dd>
<dt>copies N</dt>
<dd>
<p>Send N copies of this job to the destination.</p>
</dd>
<dt>priority C</dt>
<dd>
<p>Set the job priority letter to <var class=
"LITERAL">C</var>, where C is a single upper case
letter.</p>
</dd>
<dt>Cvalue</dt>
<dd>
<p>Set the control file line starting with <var class=
"LITERAL">C</var> to <var class=
"LITERAL">Cvalue</var>.</p>
</dd>
</dl>
</div>
<br>
<br>
<p>The exit status of the routing filter controls how the job
will be processed. If the exit code is JSUCC (0), then the
job will be processed normally, JHOLD will hold the job until
released, JREMOVE will remove the job, and so forth.</p>
</div>
<div class="NAVFOOTER">
<hr align="LEFT" width="100%">
<table summary="Footer navigation table" width="100%" border=
"0" cellpadding="0" cellspacing="0">
<tr>
<td width="33%" align="left" valign="top"><a href=
"x3595.htm" accesskey="P">Prev</a></td>
<td width="34%" align="center" valign="top"><a href=
"index.htm" accesskey="H">Home</a></td>
<td width="33%" align="right" valign="top"><a href=
"x3774.htm" accesskey="N">Next</a></td>
</tr>
<tr>
<td width="33%" align="left" valign="top">Load Balance
Queues and Printer Pools</td>
<td width="34%" align="center" valign="top"><a href=
"tutorial.htm" accesskey="U">Up</a></td>
<td width="33%" align="right" valign="top">Job Options
and the Z Control File Entry</td>
</tr>
</table>
</div>
</body>
</html>
syntax highlighted by Code2HTML, v. 0.9.1