ipc

ipc - System V IPC system calls

I int ipc(unsigned int  call , int  first , int  second \
", int " third ,
I         void * ptr , long  fifth );

R ipc () is a common kernel entry point for the System V IPC calls for messages, semaphores, and shared memory. call determines which IPC function to invoke; the other arguments are passed through to the appropriate call.

User programs should call the appropriate functions by their usual names. Only standard library implementors and kernel hackers need to know about R ipc ().

R ipc () is Linux specific, and should not be used in programs intended to be portable.

On a few architectures, for example ia64, there is no R ipc () system call; instead msgctl(2), semctl(2), shmctl(2), and so on really are implemented as separate system calls.

msgctl(2), msgget(2), msgrcv(2), msgsnd(2), semctl(2), semget(2), semop(2), semtimedop(2), shmat(2), shmctl(2), shmdt(2), shmget(2)