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

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 mem-
       ory 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 communi-
       cation 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 associated with it.

       -m  shmid
	      Remove the shared memory identifier shmid from the system. The shared  memory  seg-
	      ment  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  sema-
	      phores and data structure 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, Inter-
	      nationalization Variables for the precedence 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  interna-
	      tionalization 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  argu-
	      ments).

       LC_MESSAGES
	      Determine the locale that should be used to affect the format and contents of diag-
	      nostic messages written 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,	Standard  for Information Technology -- Portable Operating System
       Interface (POSIX), The Open Group Base Specifications 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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003					 IPCRM(P)
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