ipcrm

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 (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 .



IEEE/The Open Group                   2013                             IPCRM(1P)