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
.