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Annotation of 43BSDReno/share/doc/smm/06.lpd/2.t, revision 1.1

1.1     ! root        1: .\" Copyright (c) 1983 The Regents of the University of California.
        !             2: .\" All rights reserved.
        !             3: .\"
        !             4: .\" Redistribution and use in source and binary forms are permitted
        !             5: .\" provided that the above copyright notice and this paragraph are
        !             6: .\" duplicated in all such forms and that any documentation,
        !             7: .\" advertising materials, and other materials related to such
        !             8: .\" distribution and use acknowledge that the software was developed
        !             9: .\" by the University of California, Berkeley.  The name of the
        !            10: .\" University may not be used to endorse or promote products derived
        !            11: .\" from this software without specific prior written permission.
        !            12: .\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            13: .\" IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            14: .\" WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            15: .\"
        !            16: .\"    @(#)2.t 6.4 (Berkeley) 3/7/89
        !            17: .\"
        !            18: .NH 1
        !            19: Commands
        !            20: .NH 2
        !            21: lpd \- line printer daemon
        !            22: .PP
        !            23: The program
        !            24: .IR lpd (8),
        !            25: usually invoked at boot time from the /etc/rc file, acts as
        !            26: a master server for coordinating and controlling
        !            27: the spooling queues configured in the printcap file.
        !            28: When
        !            29: .I lpd
        !            30: is started it makes a single pass through the
        !            31: .I printcap
        !            32: database restarting any printers that have jobs.
        !            33: In normal operation
        !            34: .I lpd
        !            35: listens for service requests on multiple sockets,
        !            36: one in the UNIX domain (named ``/dev/printer'') for
        !            37: local requests, and one in the Internet domain
        !            38: (under the ``printer'' service specification)
        !            39: for requests for printer access from off machine;
        !            40: see \fIsocket\fP\|(2) and \fIservices\fP\|(5)
        !            41: for more information on sockets and service
        !            42: specifications, respectively.
        !            43: .I Lpd
        !            44: spawns a copy of itself to process the request; the master daemon
        !            45: continues to listen for new requests.
        !            46: .PP
        !            47: Clients communicate with 
        !            48: .I lpd
        !            49: using a simple transaction oriented protocol.
        !            50: Authentication of remote clients is done based
        !            51: on the ``privilege port'' scheme employed by
        !            52: \fIrshd\fP\|(8C) and \fIrcmd\fP\|(3X).
        !            53: The following table shows the requests 
        !            54: understood by
        !            55: .IR lpd .
        !            56: In each request the first byte indicates the
        !            57: ``meaning'' of the request, followed by the name
        !            58: of the printer to which it should be applied.  Additional
        !            59: qualifiers may follow, depending on the request.
        !            60: .DS
        !            61: .TS
        !            62: l l.
        !            63: Request        Interpretation
        !            64: _
        !            65: ^Aprinter\en   check the queue for jobs and print any found
        !            66: ^Bprinter\en   receive and queue a job from another machine
        !            67: ^Cprinter [users ...] [jobs ...]\en    return short list of current queue state
        !            68: ^Dprinter [users ...] [jobs ...]\en    return long list of current queue state
        !            69: ^Eprinter person [users ...] [jobs ...]\en     remove jobs from a queue
        !            70: .TE
        !            71: .DE
        !            72: .PP
        !            73: The \fIlpr\fP\|(1) command
        !            74: is used by users to enter a print job in a local queue and to notify
        !            75: the local
        !            76: .I lpd
        !            77: that there are new jobs in the spooling area.
        !            78: .I Lpd
        !            79: either schedules the job to be printed locally, or if
        !            80: printing remotely, attempts to forward
        !            81: the job to the appropriate machine.
        !            82: If the printer cannot be opened or the destination
        !            83: machine is unreachable, the job will remain queued until it is
        !            84: possible to complete the work.
        !            85: .NH 2
        !            86: lpq \- show line printer queue
        !            87: .PP
        !            88: The \fIlpq\fP\|(1)
        !            89: program works recursively backwards displaying the queue of the machine with
        !            90: the printer and then the queue(s) of the machine(s) that lead to it.
        !            91: .I Lpq
        !            92: has two forms of output: in the default, short, format it
        !            93: gives a single line of output per queued job; in the long 
        !            94: format it shows the list of files, and their sizes, that
        !            95: comprise a job.
        !            96: .NH 2
        !            97: lprm \- remove jobs from a queue
        !            98: .PP
        !            99: The \fIlprm\fP\|(1) command deletes jobs from a spooling
        !           100: queue.  If necessary, \fIlprm\fP will first kill off a
        !           101: running daemon that is servicing the queue and restart
        !           102: it after the required files are removed.  When removing
        !           103: jobs destined for a remote printer, \fIlprm\fP acts
        !           104: similarly to \fIlpq\fP except it first checks locally
        !           105: for jobs to remove and then
        !           106: tries to remove files in queues off-machine.
        !           107: .NH 2
        !           108: lpc \- line printer control program
        !           109: .PP
        !           110: The
        !           111: .IR lpc (8)
        !           112: program is used by the system administrator to control the
        !           113: operation of the line printer system.  
        !           114: For each line printer configured in /etc/printcap,
        !           115: .I lpc
        !           116: may be used to:
        !           117: .IP \(bu
        !           118: disable or enable a printer,
        !           119: .IP \(bu
        !           120: disable or enable a printer's spooling queue,
        !           121: .IP \(bu
        !           122: rearrange the order of jobs in a spooling queue,
        !           123: .IP \(bu
        !           124: find the status of printers, and their associated
        !           125: spooling queues and printer daemons.

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