Reference for unit 'ipc': Constants

IPC_CREAT

Create if key is nonexistent

IPC_EXCL

fail if key exists

IPC_INFO

For ipcs call

IPC_NOWAIT

return error on wait

IPC_RMID

Remove resource

IPC_SET

set ipc_perm options

IPC_STAT

get ipc_perm options

MSGMAX

Internal Message control code. Do not use

MSGMNB

Internal Message control code. Do not use

MSGMNI

Internal Message control code. Do not use

MSG_EXCEPT

Internal Message control code. Do not use

MSG_NOERROR

Internal Message control code. Do not use

SEM_GETALL

Semaphore operation: Get all semaphore values

SEM_GETNCNT

Semaphore operation: Get number of processes waiting for resource.

SEM_GETPID

Semaphore operation: Get process ID of last operation.

SEM_GETVAL

Semaphore operation: Get current value of semaphore

SEM_GETZCNT

Semaphore operation: Get number of processes waiting for semaphores to reach zero

SEM_SEMMNI

Semaphore operation: ?

SEM_SEMMNS

Semaphore operation: ?

SEM_SEMMSL

Semaphore operation: ?

SEM_SEMOPM

Semaphore operation: ?

SEM_SEMVMX

Semaphore operation: ?

SEM_SETALL

Semaphore operation: Set all semaphore values

SEM_SETVAL

Semaphore operation: Set semaphore value

SEM_UNDO

Constant for use in semop

SHM_LOCK

This constant is used in the shmctl call.

SHM_R

This constant is used in the shmctl call.

SHM_RDONLY

This constant is used in the shmctl call.

SHM_REMAP

This constant is used in the shmctl call.

SHM_RND

This constant is used in the shmctl call.

SHM_UNLOCK

This constant is used in the shmctl call.

SHM_W

This constant is used in the shmctl call.