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1 | .\" Copyright (c) 1983, 1993 |
2 | .\" The Regents of the University of California. All rights reserved. | |
e937f3d4 | 3 | .\" |
ad787160 C |
4 | .\" Redistribution and use in source and binary forms, with or without |
5 | .\" modification, are permitted provided that the following conditions | |
6 | .\" are met: | |
7 | .\" 1. Redistributions of source code must retain the above copyright | |
8 | .\" notice, this list of conditions and the following disclaimer. | |
9 | .\" 2. Redistributions in binary form must reproduce the above copyright | |
10 | .\" notice, this list of conditions and the following disclaimer in the | |
11 | .\" documentation and/or other materials provided with the distribution. | |
12 | .\" 3. All advertising materials mentioning features or use of this software | |
13 | .\" must display the following acknowledgement: | |
14 | .\" This product includes software developed by the University of | |
15 | .\" California, Berkeley and its contributors. | |
16 | .\" 4. Neither the name of the University nor the names of its contributors | |
17 | .\" may be used to endorse or promote products derived from this software | |
18 | .\" without specific prior written permission. | |
772c33c0 | 19 | .\" |
ad787160 C |
20 | .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
21 | .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
22 | .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
23 | .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
24 | .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
25 | .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
26 | .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
27 | .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
28 | .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
29 | .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
30 | .\" SUCH DAMAGE. | |
31 | .\" | |
32 | .\" @(#)2.t 8.1 (Berkeley) 6/8/93 | |
e937f3d4 KM |
33 | .\" |
34 | .NH 1 | |
35 | Commands | |
36 | .NH 2 | |
4e9b6bac | 37 | lpd \- line printer daemon |
e937f3d4 KM |
38 | .PP |
39 | The program | |
40 | .IR lpd (8), | |
41 | usually invoked at boot time from the /etc/rc file, acts as | |
42 | a master server for coordinating and controlling | |
43 | the spooling queues configured in the printcap file. | |
44 | When | |
45 | .I lpd | |
46 | is started it makes a single pass through the | |
47 | .I printcap | |
1c460ca9 | 48 | database restarting any printers that have jobs. |
e937f3d4 KM |
49 | In normal operation |
50 | .I lpd | |
51 | listens for service requests on multiple sockets, | |
52 | one in the UNIX domain (named ``/dev/printer'') for | |
53 | local requests, and one in the Internet domain | |
54 | (under the ``printer'' service specification) | |
55 | for requests for printer access from off machine; | |
56 | see \fIsocket\fP\|(2) and \fIservices\fP\|(5) | |
57 | for more information on sockets and service | |
58 | specifications, respectively. | |
59 | .I Lpd | |
60 | spawns a copy of itself to process the request; the master daemon | |
61 | continues to listen for new requests. | |
62 | .PP | |
63 | Clients communicate with | |
64 | .I lpd | |
65 | using a simple transaction oriented protocol. | |
66 | Authentication of remote clients is done based | |
67 | on the ``privilege port'' scheme employed by | |
68 | \fIrshd\fP\|(8C) and \fIrcmd\fP\|(3X). | |
69 | The following table shows the requests | |
70 | understood by | |
71 | .IR lpd . | |
72 | In each request the first byte indicates the | |
73 | ``meaning'' of the request, followed by the name | |
74 | of the printer to which it should be applied. Additional | |
75 | qualifiers may follow, depending on the request. | |
76 | .DS | |
77 | .TS | |
78 | l l. | |
79 | Request Interpretation | |
80 | _ | |
81 | ^Aprinter\en check the queue for jobs and print any found | |
82 | ^Bprinter\en receive and queue a job from another machine | |
83 | ^Cprinter [users ...] [jobs ...]\en return short list of current queue state | |
84 | ^Dprinter [users ...] [jobs ...]\en return long list of current queue state | |
85 | ^Eprinter person [users ...] [jobs ...]\en remove jobs from a queue | |
86 | .TE | |
87 | .DE | |
88 | .PP | |
89 | The \fIlpr\fP\|(1) command | |
90 | is used by users to enter a print job in a local queue and to notify | |
91 | the local | |
92 | .I lpd | |
93 | that there are new jobs in the spooling area. | |
94 | .I Lpd | |
1c460ca9 JB |
95 | either schedules the job to be printed locally, or if |
96 | printing remotely, attempts to forward | |
e937f3d4 KM |
97 | the job to the appropriate machine. |
98 | If the printer cannot be opened or the destination | |
99 | machine is unreachable, the job will remain queued until it is | |
100 | possible to complete the work. | |
101 | .NH 2 | |
102 | lpq \- show line printer queue | |
103 | .PP | |
104 | The \fIlpq\fP\|(1) | |
105 | program works recursively backwards displaying the queue of the machine with | |
106 | the printer and then the queue(s) of the machine(s) that lead to it. | |
107 | .I Lpq | |
108 | has two forms of output: in the default, short, format it | |
109 | gives a single line of output per queued job; in the long | |
1c460ca9 | 110 | format it shows the list of files, and their sizes, that |
e937f3d4 KM |
111 | comprise a job. |
112 | .NH 2 | |
113 | lprm \- remove jobs from a queue | |
114 | .PP | |
115 | The \fIlprm\fP\|(1) command deletes jobs from a spooling | |
116 | queue. If necessary, \fIlprm\fP will first kill off a | |
1c460ca9 | 117 | running daemon that is servicing the queue and restart |
e937f3d4 KM |
118 | it after the required files are removed. When removing |
119 | jobs destined for a remote printer, \fIlprm\fP acts | |
120 | similarly to \fIlpq\fP except it first checks locally | |
121 | for jobs to remove and then | |
122 | tries to remove files in queues off-machine. | |
123 | .NH 2 | |
124 | lpc \- line printer control program | |
125 | .PP | |
126 | The | |
127 | .IR lpc (8) | |
128 | program is used by the system administrator to control the | |
129 | operation of the line printer system. | |
130 | For each line printer configured in /etc/printcap, | |
131 | .I lpc | |
132 | may be used to: | |
133 | .IP \(bu | |
134 | disable or enable a printer, | |
135 | .IP \(bu | |
136 | disable or enable a printer's spooling queue, | |
137 | .IP \(bu | |
138 | rearrange the order of jobs in a spooling queue, | |
139 | .IP \(bu | |
140 | find the status of printers, and their associated | |
4e9b6bac | 141 | spooling queues and printer daemons. |