ipc - System V IPC system calls
int ipc(unsigned int call, int first, int second, int third,
void *ptr, long fifth);
() 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
() is Linux-specific, and should not be used in programs intended to
On some architectures—for example x86-64 and ARM—there is no
() system call; instead, msgctl
(2), and so on really are implemented as separate system calls.