/usr/include/x86_64-linux-gnu/sys/shm.h is in libc6-dev 2.27-3ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | /* Copyright (C) 1995-2018 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#ifndef _SYS_SHM_H
#define _SYS_SHM_H 1
#include <features.h>
#define __need_size_t
#include <stddef.h>
/* Get common definition of System V style IPC. */
#include <sys/ipc.h>
/* Get system dependent definition of `struct shmid_ds' and more. */
#include <bits/shm.h>
/* Define types required by the standard. */
#include <bits/types/time_t.h>
#ifdef __USE_XOPEN
# ifndef __pid_t_defined
typedef __pid_t pid_t;
# define __pid_t_defined
# endif
#endif /* X/Open */
__BEGIN_DECLS
/* The following System V style IPC functions implement a shared memory
facility. The definition is found in XPG4.2. */
/* Shared memory control operation. */
extern int shmctl (int __shmid, int __cmd, struct shmid_ds *__buf) __THROW;
/* Get shared memory segment. */
extern int shmget (key_t __key, size_t __size, int __shmflg) __THROW;
/* Attach shared memory segment. */
extern void *shmat (int __shmid, const void *__shmaddr, int __shmflg)
__THROW;
/* Detach shared memory segment. */
extern int shmdt (const void *__shmaddr) __THROW;
__END_DECLS
#endif /* sys/shm.h */
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