ipcrm(1p)
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 privilege shall be allowed to remove an
interprocess communication 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 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 IEEE Std 1003.1-2001, 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 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 original Standard can be obtained online
at http://www.opengroup.org/unix/online.html .