ipcrm(1) General Commands Manual ipcrm(1)Name
ipcrm - remove a message queue, semaphore set
Syntax
ipcrm [options]
Description
The command removes one or more specified messages, semaphores or shared memory identifiers.
The details of the removes are described in and The identifiers and keys may be found by
Options-q msqid Removes the message queue identifier msqid from the system and destroys the message queue and data structure associated
with it.
-m shmid Removes the shared memory identifier shmid from the system. The shared memory segment and data structure associated
with it are destroyed after the last detach.
-s semid Removes the semaphore identifier semid from the system and destroys the set of semaphores and data structure associated
with it.
-Q msgkey Removes the message queue identifier, created with key msgkey, from the system and destroys the message queue and data
structure associated with it.
-M shmkey Removes the shared memory identifier, created with key shmkey, from the system. The shared memory segment and data
structure associated with it are destroyed after the last detach.
-S semkey Removes the semaphore identifier, created with key semkey, from the system and destroys the set of semaphores and data
structure associated with it.
See Alsoipcs(1), msgctl(2), msgget(2), msgop(2), semctl(2), semget(2), semop(2), shmctl(2), shmget(2), shmop(2)ipcrm(1)
Check Out this Related Man Page
ipcrm(1) BSD General Commands Manual ipcrm(1)NAME
ipcrm -- remove the specified message queues, semaphore sets, and shared memory segments
SYNOPSIS
ipcrm [-M shmkey] [-m shmid] [-Q msgkey] [-q msqid] [-S semkey] [-s semid] ...
DESCRIPTION
Ipcrm removes the specified message queues, semaphores and shared memory segments. These System V IPC objects can be specified by their cre-
ation id or any associated key.
The following options are used to specify which IPC objects will be removed. Any number and combination of these options can be used:
-M shmkey
Mark the shared memory segment associated with key shmkey for removal. This marked segment will be destroyed after the last detach.
-m shmid
Mark the shared memory segment associated with id shmid for removal. This marked segment will be destroyed after the last detach.
-Q msgkey
Remove the message queue associated with key msgkey from the system.
-q msqid
Remove the message queue associated with the id msqid from the system.
-S semkey
Remove the semaphore set associated with key semkey from the system.
-s semid
Removes the semaphore set associated with id semid from the system.
The identifiers and keys associated with these System V IPC objects can be determined by using ipcs(1)SEE ALSO ipcs(1)BSD August 8, 1994 BSD
This is on HP UNIX version 11. I have a shared memory segment that is marked for deallocation .... see below
m 521 0x00000000 D-rw-rw---- oracle dba
The D says it marked for deallocation. I tried to do the ipcrm -m 521. The message said it cannot find the segment. I assume... (1 Reply)
Hi Friends,
If i execute this command it comes back with 300 lines:
ipcs|grep cerebrus >>> i would like to clear the semaphores but ipcrm can remove one id at a time. is there a quicker way of removing semaphores maybe using awk?
Regards, (1 Reply)
Hello,
With next simple command line I get all allocated semaphore numbers:
ipcs -s | awk 'NR > 3 {print $2}'
Now I want to add ipcrm -s before each semaphore id and actually delete every last of them.
The question is: Can I do the operation in a command itself, without redirecting awk... (2 Replies)
I'm facing a problem interpreting the shared memory key on an AIX machine.
(1) I go to a property file and I see the following:
shm_key = "119112066"
(2) So I now go the command prompt and do this:
ipcs -m | grep 119112066
And, I do not find it. So what I do is to run the... (2 Replies)
I created a shared memory and attached it. I also created the appropriate semaphores to sync. my read/write operations. However I do not know how am I supposed to do so. Anyone has got any ideas? I want to write int the form of 1234:23:444:... where each number between : means something to the... (0 Replies)