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 differ (con-
       sult 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 structure associ-
              ated 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 structure associ-
              ated 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 precedence  of  international-
              ization 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 example, 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 written to stan-
              dard 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, Standard for
       Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 6,  Copy-
       right (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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                                     IPCRM(1P)