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IPCRM(1P)                  POSIX Programmer's Manual                 IPCRM(1P)



PROLOG
       This manual page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may dif-
       fer (consult the corresponding Linux manual page for details of Linux behavior), or the interface  may  not  be
       implemented on Linux.

NAME
       ipcrm - remove an XSI message queue, semaphore set, or shared memory segment identifier

SYNOPSIS
       ipcrm [ -q msgid | -Q msgkey | -s semid | -S semkey |
              -m shmid | -M shmkey ] ...

DESCRIPTION
       The  ipcrm  utility  shall  remove  zero or more message queues, semaphore sets, or shared memory segments. The
       interprocess communication facilities to be removed are specified by the options.

       Only a user with appropriate privilege shall be allowed to remove an interprocess communication  facility  that
       was not created by or owned by the user invoking ipcrm.

OPTIONS
       The  ipcrm  facility supports the Base Definitions volume of IEEE Std 1003.1-2001, Section 12.2, Utility Syntax
       Guidelines.

       The following options shall be supported:

       -q  msgid
              Remove the message queue identifier msgid from the system and destroy the message queue and data  struc-
              ture associated with it.

       -m  shmid
              Remove  the shared memory identifier shmid from the system. The shared memory segment and data structure
              associated with it shall be destroyed after the last detach.

       -s  semid
              Remove the semaphore identifier semid from the system and destroy the set of semaphores and data  struc-
              ture associated with it.

       -Q  msgkey
              Remove  the  message  queue identifier, created with key msgkey, from the system and destroy the message
              queue and data structure associated with it.

       -M  shmkey
              Remove the shared memory identifier, created with key shmkey, from the system. The shared memory segment
              and data structure associated with it shall be destroyed after the last detach.

       -S  semkey
              Remove  the  semaphore  identifier,  created  with  key  semkey,  from the system and destroy the set of
              semaphores and data structure associated with it.


OPERANDS
       None.

STDIN
       Not used.

INPUT FILES
       None.

ENVIRONMENT VARIABLES
       The following environment variables shall affect the execution of ipcrm:

       LANG   Provide a default value for the internationalization variables that are unset or  null.  (See  the  Base
              Definitions  volume  of IEEE Std 1003.1-2001, Section 8.2, Internationalization Variables for the prece-
              dence of internationalization variables used to determine the values of locale categories.)

       LC_ALL If set to a non-empty string value, override the values of all the other internationalization variables.

       LC_CTYPE
              Determine  the locale for the interpretation of sequences of bytes of text data as characters (for exam-
              ple, single-byte as opposed to multi-byte characters in arguments).

       LC_MESSAGES
              Determine the locale that should be used to affect the format and contents of diagnostic messages  writ-
              ten to standard error.

       NLSPATH
              Determine the location of message catalogs for the processing of LC_MESSAGES .


ASYNCHRONOUS EVENTS
       Default.

STDOUT
       Not used.

STDERR
       The standard error shall be used only for diagnostic messages.

OUTPUT FILES
       None.

EXTENDED DESCRIPTION
       None.

EXIT STATUS
       The following exit values shall be returned:

        0     Successful completion.

       >0     An error occurred.


CONSEQUENCES OF ERRORS
       Default.

       The following sections are informative.

APPLICATION USAGE
       None.

EXAMPLES
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       ipcs, the System Interfaces volume of IEEE Std 1003.1-2001, msgctl(), semctl(), shmctl()

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition, Stan-
       dard for Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base  Specifica-
       tions  Issue  6,  Copyright (C) 2001-2003 by the Institute of Electrical and Electronics Engineers, Inc and The
       Open Group. In the event of any discrepancy between this version and the  original  IEEE  and  The  Open  Group
       Standard,  the  original IEEE and The Open Group Standard is the referee document. The original Standard can be
       obtained online at http://www.opengroup.org/unix/online.html .



IEEE/The Open Group                  2003                            IPCRM(1P)