semaphore

[tarek_3]

sorry i send this message twice with in the wrong category,i hope this time ....
hi
i have a probleme with my c program.
when i kill my program the semaphore related still set. the program run as root
how can i know the correct ID to remove semaphore set related to my program.

[Carlo Henrico_1]

Do a man on ipcs and ipcrm. ipcs shows what aemaphores are in use and ipcrm will clear them.

Good luck

Carlo

[Ravi_8]

Hi,

$ipcs
list all IPC
to terminate ipc's kill wouldn't work

to kill semaphores
$ipcrm -s

[Dietmar Konermann]

This is the normal behaviour unless you set SEM_UNDO in your semaphore operations's sem_flg. Only in this case the kernel will perform the undo operation when the process exits. However, complete removal of the semaphore needs to be done explicitely using (signal driven) cleanup functions.

See man semop(2) for more details.

Best regards...
Dietmar.