# ipcrm

## PROLOG



           This manual page is part of the POSIX Programmer's Manual.  The
           Linux implementation of this interface may differ (consult the
           corresponding Linux manual page for details of Linux behavior), or
           the interface may not be implemented on Linux.
    


## 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 privileges shall be allowed to remove
           an interprocess communication facility that was not created by or
           owned by the user invoking _ipcrm_.
    


## OPTIONS



           The _ipcrm_ utility shall conform to the Base Definitions volume of
           POSIX.1‐2017, _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 POSIX.1‐2017, _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.
    


* * *