Man page - ipc(2)

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Manual

ipc

NAME
LIBRARY
SYNOPSIS
DESCRIPTION
VERSIONS
STANDARDS
SEE ALSO

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 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)