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 ap-
propriate 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() sys-
tem 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), se-
mop(2), semtimedop(2), shmat(2), shmctl(2), shmdt(2), shmget(2),
sysvipc(7)
Linux man-pages 6.03 2023-02-05 ipc(2)
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