ipc - System V IPC system calls
#include <linux/ipc.h> /* Definition of needed constants */
#include <sys/syscall.h> /* Definition of SYS_* constants */
int syscall(SYS_ipc, unsigned int call, int first,
unsigned long second, unsigned long third, void *ptr,
Note: glibc provides no wrapper for ipc(),
necessitating the use of syscall(2).
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
User-space programs should call the appropriate functions by their
usual names. Only standard library implementors and kernel hackers need to
know about ipc().
ipc() is Linux-specific, and should not be used in programs intended to
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.
msgctl(2), msgget(2), msgrcv(2), msgsnd(2),
semctl(2), semget(2), semop(2), semtimedop(2),
shmat(2), shmctl(2), shmdt(2), shmget(2),
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/.