1/* bits/ipctypes.h -- Define some types used by SysV IPC/MSG/SHM.
2 Copyright (C) 2012-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#ifndef _SYS_IPC_H
20# error "Never use <bits/ipctypes.h> directly; include <sys/ipc.h> instead."
21#endif
22
23#ifndef _BITS_IPCTYPES_H
24#define _BITS_IPCTYPES_H 1
25
26/* Used in `struct shmid_ds'. */
27# ifdef __x86_64__
28typedef int __ipc_pid_t;
29# else
30typedef unsigned short int __ipc_pid_t;
31# endif
32
33#endif /* bits/ipctypes.h */
34

source code of glibc/sysdeps/unix/sysv/linux/x86/bits/ipctypes.h