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 .