1IPC(2)                     Linux Programmer's Manual                    IPC(2)
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NAME

6       ipc - System V IPC system calls
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SYNOPSIS

9       #include <linux/ipc.h>        /* Definition of needed constants */
10       #include <sys/syscall.h>      /* Definition of SYS_* constants */
11       #include <unistd.h>
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13       int syscall(SYS_ipc, unsigned int call, int first,
14                   unsigned long second, unsigned long third, void *ptr,
15                   long fifth);
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17       Note:  glibc  provides  no  wrapper for ipc(), necessitating the use of
18       syscall(2).
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DESCRIPTION

21       ipc() is a common kernel entry point for the  System V  IPC  calls  for
22       messages,  semaphores,  and  shared  memory.  call determines which IPC
23       function to invoke; the other arguments are passed through to  the  ap‐
24       propriate call.
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26       User-space  programs  should  call  the  appropriate functions by their
27       usual names.  Only standard library  implementors  and  kernel  hackers
28       need to know about ipc().
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CONFORMING TO

31       ipc() is Linux-specific, and should not be used in programs intended to
32       be portable.
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NOTES

35       On some architectures—for example x86-64 and ARM—there is no ipc() sys‐
36       tem  call;  instead,  msgctl(2), semctl(2), shmctl(2), and so on really
37       are implemented as separate system calls.
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SEE ALSO

40       msgctl(2), msgget(2), msgrcv(2), msgsnd(2), semctl(2),  semget(2),  se‐
41       mop(2),   semtimedop(2),   shmat(2),  shmctl(2),  shmdt(2),  shmget(2),
42       sysvipc(7)
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COLOPHON

45       This page is part of release 5.13 of the Linux  man-pages  project.   A
46       description  of  the project, information about reporting bugs, and the
47       latest    version    of    this    page,    can     be     found     at
48       https://www.kernel.org/doc/man-pages/.
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52Linux                             2021-03-22                            IPC(2)
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