ipc
Section: System Calls (2)
Updated: 2023-02-05
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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().
STANDARDS
ipc()
is Linux-specific, and should not be used in programs
intended to be portable.
NOTES
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.
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)
Index
- NAME
-
- LIBRARY
-
- SYNOPSIS
-
- DESCRIPTION
-
- STANDARDS
-
- NOTES
-
- SEE ALSO
-
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