lpq(1) [bsd man page]

LPQ(1)							      General Commands Manual							    LPQ(1)

NAME

       lpq - spool queue examination program

SYNOPSIS

       lpq [ +[ n ] ] [ -l ] [ -Pprinter ] [ job # ... ] [ user ... ]

DESCRIPTION

       lpq  examines  the spooling area used by lpd(8) for printing files on the line printer, and reports the status of the specified jobs or all
       jobs associated with a user.  lpq invoked without any arguments reports on any jobs currently in the queue.  A -P flag may be used to spec-
       ify  a  particular  printer,  otherwise the default line printer is used (or the value of the PRINTER variable in the environment).  If a +
       argument is supplied, lpq displays the spool queue until it empties.  Supplying a number immediately after the + sign  indicates  that  lpq
       should  sleep n seconds in between scans of the queue.  All other arguments supplied are interpreted as user names or job numbers to filter
       out only those jobs of interest.

       For each job submitted (i.e. invocation of lpr(1)) lpq reports the user's name, current rank in the queue, the names  of  files	comprising
       the  job,  the job identifier (a number which may be supplied to lprm(1) for removing a specific job), and the total size in bytes.  The -l
       option causes information about each of the files comprising the job to be printed.  Normally, only as much information as will fit on  one
       line  is  displayed.   Job  ordering is dependent on the algorithm used to scan the spooling directory and is supposed to be FIFO (First in
       First Out).  File names comprising a job may be unavailable (when lpr(1) is used as a sink in a pipeline) in which case the file  is  indi-
       cated as ``(standard input)".

       If lpq warns that there is no daemon present (i.e. due to some malfunction), the lpc(8) command can be used to restart the printer daemon.

FILES

       /etc/termcap	       for manipulating the screen for repeated display
       /etc/printcap	       to determine printer characteristics
       /usr/spool/*	       the spooling directory, as determined from printcap
       /usr/spool/*/cf*        control files specifying jobs
       /usr/spool/*/lock       the lock file to obtain the currently active job

SEE ALSO

       lpr(1), lprm(1), lpc(8), lpd(8)

BUGS

       Due  to	the  dynamic nature of the information in the spooling directory lpq may report unreliably.  Output formatting is sensitive to the
       line length of the terminal; this can results in widely spaced columns.

DIAGNOSTICS

       Unable to open various files.  The lock file being malformed.  Garbage files when there is no daemon active,  but  files  in  the  spooling
       directory.

4.2 Berkeley Distribution					   June 5, 1986 							    LPQ(1)

Check Out this Related Man Page

lprm(1) General Commands Manual lprm(1)

Name
lprm - remove jobs from line printer queue

Syntax
lprm [-Pprinter] [-] [job #...] [user...]

Description
The command removes a job, or jobs, from a printer's spool queue. Since the spooling directory is protected from users, using is normally
the only method by which a user may remove a job.

The command without any arguments deletes the currently active job if it is owned by the user who invoked

If the - flag is specified, removes all jobs which a user owns. If the super-user employs this flag, the spool queue is emptied entirely.
The owner is determined by the user's login name and host name on the machine where the command was invoked.

Specifying a user's name, or list of user names, causes to attempt to remove any jobs queued belonging to that user (or users). This form
of invoking is useful only to the super-user.

A user may dequeue an individual job by specifying its job number. This number may be obtained from the program. For example,
% lpq -l

1st: ken [job #013ucbarpa]
(standard input) 100 bytes
% lprm 13

The command announces the names of any files it removes and is silent if there are no jobs in the queue which match the request list.

The command kills off an active daemon, if necessary, before removing any spooling files. If a daemon is killed, a new one is automati-
cally restarted upon completion of file removals.

Options
- Removes all jobs owned by you only.

-P printer Removes jobs from specified printer. It may be used to specify the queue associated with a specific printer (otherwise
the default printer, or the value of the PRINTER variable in the environment is used).

Restrictions
Since there are race conditions possible in the update of the lock file, the currently active job may be incorrectly identified.

Diagnostics
``Permission denied" if the user tries to remove files other than his own.

Files
/etc/printcap printer characteristics file
/usr/spool/* spooling directories
/usr/spool/*/lock lock file used to obtain the pid of the current
daemon and the job number of the currently active job

Linux and UNIX Man Pages

lpq(1) [bsd man page]

Check Out this Related Man Page