IPCRM(P) POSIX Programmer's Manual IPCRM(P)
ipcrm - remove an XSI message queue, semaphore set, or shared memory segment identifier
ipcrm [ -q msgid | -Q msgkey | -s semid | -S semkey |
-m shmid | -M shmkey ] ...
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
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.
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:
Remove the message queue identifier msgid from the system and destroy the message
queue and data structure associated with it.
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
Remove the semaphore identifier semid from the system and destroy the set of sema-
phores and data structure associated with it.
Remove the message queue identifier, created with key msgkey, from the system and
destroy the message queue and data structure associated with it.
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.
Remove the semaphore identifier, created with key semkey, from the system and
destroy the set of semaphores and data structure associated with it.
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-
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-
Determine the locale that should be used to affect the format and contents of diag-
nostic messages written to standard error.
Determine the location of message catalogs for the processing of LC_MESSAGES .
The standard error shall be used only for diagnostic messages.
The following exit values shall be returned:
0 Successful completion.
>0 An error occurred.
CONSEQUENCES OF ERRORS
The following sections are informative.
ipcs , the System Interfaces volume of IEEE Std 1003.1-2001, msgctl(), semctl(), shmctl()
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)