home *** CD-ROM | disk | FTP | other *** search
- .\" Copyright (c) 1983 The Regents of the University of California.
- .\" All rights reserved.
- .\"
- .\" Redistribution and use in source and binary forms, with or without
- .\" modification, are permitted provided that the following conditions
- .\" are met:
- .\" 1. Redistributions of source code must retain the above copyright
- .\" notice, this list of conditions and the following disclaimer.
- .\" 2. Redistributions in binary form must reproduce the above copyright
- .\" notice, this list of conditions and the following disclaimer in the
- .\" documentation and/or other materials provided with the distribution.
- .\" 3. All advertising materials mentioning features or use of this software
- .\" must display the following acknowledgement:
- .\" This product includes software developed by the University of
- .\" California, Berkeley and its contributors.
- .\" 4. Neither the name of the University nor the names of its contributors
- .\" may be used to endorse or promote products derived from this software
- .\" without specific prior written permission.
- .\"
- .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- .\" SUCH DAMAGE.
- .\"
- .\" @(#)2.t 6.5 (Berkeley) 4/17/91
- .\"
- .NH 1
- Commands
- .NH 2
- lpd \- line printer daemon
- .PP
- The program
- .IR lpd (8),
- usually invoked at boot time from the /etc/rc file, acts as
- a master server for coordinating and controlling
- the spooling queues configured in the printcap file.
- When
- .I lpd
- is started it makes a single pass through the
- .I printcap
- database restarting any printers that have jobs.
- In normal operation
- .I lpd
- listens for service requests on multiple sockets,
- one in the UNIX domain (named ``/dev/printer'') for
- local requests, and one in the Internet domain
- (under the ``printer'' service specification)
- for requests for printer access from off machine;
- see \fIsocket\fP\|(2) and \fIservices\fP\|(5)
- for more information on sockets and service
- specifications, respectively.
- .I Lpd
- spawns a copy of itself to process the request; the master daemon
- continues to listen for new requests.
- .PP
- Clients communicate with
- .I lpd
- using a simple transaction oriented protocol.
- Authentication of remote clients is done based
- on the ``privilege port'' scheme employed by
- \fIrshd\fP\|(8C) and \fIrcmd\fP\|(3X).
- The following table shows the requests
- understood by
- .IR lpd .
- In each request the first byte indicates the
- ``meaning'' of the request, followed by the name
- of the printer to which it should be applied. Additional
- qualifiers may follow, depending on the request.
- .DS
- .TS
- l l.
- Request Interpretation
- _
- ^Aprinter\en check the queue for jobs and print any found
- ^Bprinter\en receive and queue a job from another machine
- ^Cprinter [users ...] [jobs ...]\en return short list of current queue state
- ^Dprinter [users ...] [jobs ...]\en return long list of current queue state
- ^Eprinter person [users ...] [jobs ...]\en remove jobs from a queue
- .TE
- .DE
- .PP
- The \fIlpr\fP\|(1) command
- is used by users to enter a print job in a local queue and to notify
- the local
- .I lpd
- that there are new jobs in the spooling area.
- .I Lpd
- either schedules the job to be printed locally, or if
- printing remotely, attempts to forward
- the job to the appropriate machine.
- If the printer cannot be opened or the destination
- machine is unreachable, the job will remain queued until it is
- possible to complete the work.
- .NH 2
- lpq \- show line printer queue
- .PP
- The \fIlpq\fP\|(1)
- program works recursively backwards displaying the queue of the machine with
- the printer and then the queue(s) of the machine(s) that lead to it.
- .I Lpq
- has two forms of output: in the default, short, format it
- gives a single line of output per queued job; in the long
- format it shows the list of files, and their sizes, that
- comprise a job.
- .NH 2
- lprm \- remove jobs from a queue
- .PP
- The \fIlprm\fP\|(1) command deletes jobs from a spooling
- queue. If necessary, \fIlprm\fP will first kill off a
- running daemon that is servicing the queue and restart
- it after the required files are removed. When removing
- jobs destined for a remote printer, \fIlprm\fP acts
- similarly to \fIlpq\fP except it first checks locally
- for jobs to remove and then
- tries to remove files in queues off-machine.
- .NH 2
- lpc \- line printer control program
- .PP
- The
- .IR lpc (8)
- program is used by the system administrator to control the
- operation of the line printer system.
- For each line printer configured in /etc/printcap,
- .I lpc
- may be used to:
- .IP \(bu
- disable or enable a printer,
- .IP \(bu
- disable or enable a printer's spooling queue,
- .IP \(bu
- rearrange the order of jobs in a spooling queue,
- .IP \(bu
- find the status of printers, and their associated
- spooling queues and printer daemons.
-