man/man2/ipc.2

   1 .\" Copyright (c) 1995 Michael Chastain (mec@shell.portal.com), 15 April 1995.
   2 .\"
   3 .\" SPDX-License-Identifier: GPL-2.0-or-later
   4 .\"
   5 .\" Modified Tue Oct 22 08:11:14 EDT 1996 by Eric S. Raymond <esr@thyrsus.com>
   6 .TH ipc 2 (date) "Linux man-pages (unreleased)"
   7 .SH NAME
   8 ipc \- System V IPC system calls
   9 .SH LIBRARY
  10 Standard C library
  11 .RI ( libc ", " \-lc )
  12 .SH SYNOPSIS
  13 .nf
  14 .BR "#include <linux/ipc.h>" "        /* Definition of needed constants */"
  15 .BR "#include <sys/syscall.h>" "      /* Definition of " SYS_* " constants */"
  16 .B #include <unistd.h>
  17 .P
  18 .BI "int syscall(SYS_ipc, unsigned int " call ", int " first ,
  19 .BI "            unsigned long " second ", unsigned long " third \
  20 ", void *" ptr ,
  21 .BI "            long " fifth );
  22 .fi
  23 .P
  24 .IR Note :
  25 glibc provides no wrapper for
  26 .BR ipc (),
  27 necessitating the use of
  28 .BR syscall (2).
  29 .SH DESCRIPTION
  30 .BR ipc ()
  31 is a common kernel entry point for the System\ V IPC calls
  32 for messages, semaphores, and shared memory.
  33 .I call
  34 determines which IPC function to invoke;
  35 the other arguments are passed through to the appropriate call.
  36 .P
  37 User-space programs should call the appropriate functions by their usual names.
  38 Only standard library implementors and kernel hackers need to know about
  39 .BR ipc ().
  40 .SH VERSIONS
  41 On some architectures\[em]for example x86-64 and ARM\[em]there is no
  42 .BR ipc ()
  43 system call; instead,
  44 .BR msgctl (2),
  45 .BR semctl (2),
  46 .BR shmctl (2),
  47 and so on really are implemented as separate system calls.
  48 .SH STANDARDS
  49 Linux.
  50 .SH SEE ALSO
  51 .BR msgctl (2),
  52 .BR msgget (2),
  53 .BR msgrcv (2),
  54 .BR msgsnd (2),
  55 .BR semctl (2),
  56 .BR semget (2),
  57 .BR semop (2),
  58 .BR semtimedop (2),
  59 .BR shmat (2),
  60 .BR shmctl (2),
  61 .BR shmdt (2),
  62 .BR shmget (2),
  63 .BR sysvipc (7)