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 correspond-
ing 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 asso-
ciated 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 Technol-
ogy -- 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 Stan-
dard 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)