This is the command ipcrmposix that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator
PROGRAM:
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.1‐2008, 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.1‐2008, 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.
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