ipcrm



IPCRM(P)                                                              IPCRM(P)




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 facili-
       ties 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  Vari-
              ables  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 .



POSIX                                2003                             IPCRM(P)

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