NAME

       ipc - System V IPC system calls

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().

CONFORMING TO

       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)

COLOPHON

       This  page  is  part of release 5.13 of the Linux man-pages project.  A description of the
       project, information about reporting bugs, and the latest version of  this  page,  can  be
       found at https://www.kernel.org/doc/man-pages/.