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PROLOG
       This  manual  page  is part of the POSIX Programmer's Manual.  The Linux implementation of
       this interface may differ (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  privileges  shall  be  allowed to remove an interprocess
       communication facility that was not created by or owned by the user invoking ipcrm.


OPTIONS
       The ipcrm utility shall conform to the Base Definitions volume  of  POSIX.1‐2008,  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
                 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 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   POSIX.1‐2008,   Section   8.2,
                 Internationalization   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
                 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 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 Base Definitions volume of POSIX.1‐2008, Chapter  8,  Environment  Variables,  Section
       12.2, Utility Syntax Guidelines

       The System Interfaces volume of POSIX.1‐2008, msgctl(), semctl(), shmctl()


COPYRIGHT
       Portions  of  this  text  are  reprinted  and  reproduced in electronic form from IEEE Std
       1003.1, 2013 Edition, Standard for Information Technology  --  Portable  Operating  System
       Interface  (POSIX),  The Open Group Base Specifications Issue 7, Copyright (C) 2013 by the
       Institute of Electrical and Electronics Engineers, Inc  and  The  Open  Group.   (This  is
       POSIX.1-2008  with  the  2013  Technical  Corrigendum  1  applied.)  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.unix.org/online.html .

       Any typographical or formatting errors that appear in this page are most  likely  to  have
       been  introduced  during  the conversion of the source files to man page format. To report
       such errors, see https://www.kernel.org/doc/man-pages/reporting_bugs.html .