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24          <th colspan="3" align="center">LPRng Reference Manual: 5
25          Sep 2003 (For LPRng-3.8.22)</th>
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42    <div class="SECT1">
43      <h1 class="SECT1"><a name="LPSIMULATION">2.11. Emulation for
44      UNIX SystemV <b class="APPLICATION">lp</b> and <b class=
45      "APPLICATION">lpstat</b></a></h1>
46
47      <p>Many utilities in the UNIX System V environment require
48      the <b class="APPLICATION">lp</b>, <b class=
49      "APPLICATION">lpstat</b>, and <b class=
50      "APPLICATION">cancel</b> programs. It is almost impossible to
51      modify these utilities, as many are <span class="emphasis"><i
52      class="EMPHASIS">vintage</i></span> software which is
53      unsupported or which would be too costly to update. In order
54      to support these applications <b class=
55      "APPLICATION">LPRng</b> emulates the <b class=
56      "APPLICATION">lp</b>, <b class="APPLICATION">lpstat</b>, and
57      <b class="APPLICATION">clean</b> programs. See the <b class=
58      "APPLICATION">LPRng</b> man pages for <b class=
59      "APPLICATION">lp</b>, <b class="APPLICATION">lpstat</b>, and
60      <b class="APPLICATION">cancel</b> in the <b class=
61      "APPLICATION">LPRng</b> distribution for details and
62      compatibility.</p>
63
64      <p>The <b class="APPLICATION">LPRng</b> <b class=
65      "APPLICATION">lpstat</b> emulator accepts the <b class=
66      "APPLICATION">lpstat</b> command line options returns status
67      in a format that is close to the one that common <b class=
68      "APPLICATION">lpstat</b> implementations return.
69      Unfortunately, due to the wide variety of different
70      modifications and vendor versions of <b class=
71      "APPLICATION">lpstat</b> there are slight differences between
72      the this status and the status returned by the original <b
73      class="APPLICATION">lpstat</b>. If this is the case, then
74      there is little to do but to modify the source code for <b
75      class="APPLICATION">lpstat</b> and compile a version that
76      implements the required format.</p>
77
78      <p>If the <b class="APPLICATION">lpr</b> program is invoked
79      with the name <b class="APPLICATION">lp</b>, it will simulate
80      the <b class="APPLICATION">lp</b> options. This can be done
81      by making a symbolic link to the <b class=
82      "APPLICATION">lpr</b> program or by making a copy of the <b
83      class="APPLICATION">lpr</b> program with the name <b class=
84      "APPLICATION">lp</b>.</p>
85
86      <div class="INFORMALEXAMPLE">
87        <a name="AEN1338"></a>
88<pre class="SCREEN">
89    <samp class="PROMPT">h4: {59} #</samp> <kbd class=
90"USERINPUT">cd /usr/bin</kbd>
91    <samp class="PROMPT">h4: {60} #</samp> <kbd class=
92"USERINPUT">ln -s lpr lp</kbd>
93    <samp class="PROMPT">h4: {61} #</samp> <kbd class=
94"USERINPUT">lp /tmp/hi</kbd>
95    request id is root@h4+489
96</pre>
97      </div>
98      <br>
99      <br>
100
101      <p>Finally, if the <b class="APPLICATION">lprm</b> program is
102      invoked with the name <b class="APPLICATION">cancel</b> it
103      will simulate the <b class="APPLICATION">cancel</b> command.
104      This can be done by making a symbolic link to the <b class=
105      "APPLICATION">lprm</b> program or by making a copy of the <b
106      class="APPLICATION">lprm</b> program with the name <b class=
107      "APPLICATION">cancel</b>.</p>
108
109      <div class="INFORMALEXAMPLE">
110        <a name="AEN1353"></a>
111<pre class="SCREEN">
112    <samp class="PROMPT">h4: {62} #</samp> <kbd class=
113"USERINPUT">cd /usr/bin</kbd>
114    <samp class="PROMPT">h4: {63} #</samp> <kbd class=
115"USERINPUT">ln -s lprm cancel</kbd>
116    <samp class="PROMPT">h4: {64} #</samp> <kbd class=
117"USERINPUT">cancel 489</kbd>
118    cancel 513
119    Printer lp@h9:
120      checking perms 'root@h9+513'
121      dequeued 'root@h9+513'
122</pre>
123      </div>
124      <br>
125      <br>
126
127      <p>Many <span class="emphasis"><i class=
128      "EMPHASIS">vintage</i></span> or <span class="emphasis"><i
129      class="EMPHASIS">legacy</i></span> applications have fully
130      qualified paths to the <b class="APPLICATION">lp</b> and <b
131      class="APPLICATION">lpstat</b> executables, and it may be
132      necessary to make additional symbolic links or copies of the
133      <b class="APPLICATION">LPRng</b> executables to satisfy their
134      pathname requirements.</p>
135
136      <div class="INFORMALEXAMPLE">
137        <a name="AEN1367"></a>
138<pre class="SCREEN">
139    <samp class="PROMPT">h4: {65} #</samp> <kbd class=
140"USERINPUT">ln -s /usr/bin/lpr /usr/ucb/lpr</kbd>
141</pre>
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