ipc(2) — Linux manual page

ipc(2)                     System Calls Manual                    ipc(2)

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().

VERSIONS

       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.

STANDARDS

       Linux.

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

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       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
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       man-pages@man7.org

Linux man-pages 6.9.1          2024-05-02                         ipc(2)

Pages that refer to this page: semctl(2), syscalls(2), unimplemented(2), seccomp_syscall_resolve_name(3), sysvipc(7)

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