NAME

       ipc - System V IPC system calls

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <linux/ipc.h>        /* Definition of needed constants */
       #include <sys/syscall.h>      /* Definition of SYS_* constants */
       #include <unistd.h>

       int syscall(SYS_ipc, unsigned int call, int first,
                   unsigned long second, unsigned long third, void *ptr,
                   long fifth);

       Note: glibc provides no wrapper for ipc(), necessitating the use of syscall(2).

DESCRIPTION

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

STANDARDS

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

NOTES

       On some architectures—for example x86-64 and ARM—there is no ipc() system  call;  instead,
       msgctl(2),  semctl(2),  shmctl(2),  and  so  on  really are implemented as separate system
       calls.

SEE ALSO

       msgctl(2), msgget(2), msgrcv(2), msgsnd(2), semctl(2), semget(2), semop(2), semtimedop(2),
       shmat(2), shmctl(2), shmdt(2), shmget(2), sysvipc(7)