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25          <th colspan="3" align="center">LPRng Reference Manual: 5
26          Sep 2003 (For LPRng-3.8.22)</th>
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33          <td width="80%" align="center" valign="bottom">Chapter
34          17. Permissions and Authentication</td>
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43    <div class="SECT1">
44      <h1 class="SECT1"><a name="PERMSPATH">17.3. Permission File
45      Location</a></h1>
46
47      <p>Options used:</p>
48
49      <ul>
50        <li>
51          <p><var class="LITERAL">perms_path=</var><span class=
52          "emphasis"><i class="EMPHASIS">path</i></span></p>
53        </li>
54      </ul>
55      <br>
56      <br>
57
58      <p>The <var class="LITERAL">perms_path=</var> configuration
59      variable specifies the location of the default permissions
60      file. The default value is:</p>
61
62      <div class="INFORMALEXAMPLE">
63        <a name="AEN8900"></a>
64<pre class="SCREEN">
65    perms_path=${sysconfdir}/lpd.perms
66</pre>
67      </div>
68      <br>
69      <br>
70
71      <p>The <tt class="FILENAME">lpd.perms</tt> file can be
72      obtained by running a program, in a similar manner to the <tt
73      class="FILENAME">printcap</tt> file. See <a href=
74      "filters.htm">Filters</a> for details on how the program
75      would be invoked. For example, assume the configuration
76      information specified:</p>
77
78      <div class="INFORMALEXAMPLE">
79        <a name="AEN8906"></a>
80<pre class="SCREEN">
81    perms_path=|/usr/local/libexec/get_perms
82</pre>
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84      <br>
85      <br>
86
87      <p>The <b class="APPLICATION">lpd</b> server will write
88      either a blank line for connection (<var class=
89      "LITERAL">SERVICE=X</var>) and global <b class=
90      "APPLICATION">lpc</b> permissions (<var class=
91      "LITERAL">SERVICE=C</var> and <var class=
92      "LITERAL">LPC=reread,lpd,default</var>) or the name of the
93      spool queue to the <var class="LITERAL">get_perms</var>
94      <acronym class="ACRONYM">STDIN</acronym>, and expects to read
95      permission information from its <acronym class=
96      "ACRONYM">STDOUT</acronym>. If the filter method is used, it
97      should always return the complete set of connection (<var
98      class="LITERAL">X</var>) and control (<var class=
99      "LITERAL">C</var> service values.</p>
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126          Permission File</td>
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