NAME
ipc - System V IPC system calls
LIBRARY
Standard C library (libc, -lc)
SYNOPSIS
#include <linux/ipc.h>\n /* Definition of needed constants */
\n#include <sys/syscall.h>\n /* Definition of \nSYS_*\n constants */
\n#include <unistd.h>int syscall(SYS_ipc, unsigned int \ncall\n, int \nfirst\n,\n
\n unsigned long \nsecond\n, unsigned long \nthird\n, void *\nptr\n,\n
\n long \nfifth\n);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)