ipc2
System v ipc system calls
Usage
#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).
Library
Standard C library (libc, -lc)
Overview
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.
Releases
19 releases since Debian 1.1 (Buzz); the text changed 15 times.