/usr/include/x86_64-linux-gnu/bits/sem.h is in libc6-dev 2.15-0ubuntu10.18.
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 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 | /* Copyright (C) 2002, 2011 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, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _SYS_SEM_H
# error "Never include <bits/sem.h> directly; use <sys/sem.h> instead."
#endif
#include <sys/types.h>
/* Flags for `semop'. */
#define SEM_UNDO 0x1000 /* undo the operation on exit */
/* Commands for `semctl'. */
#define GETPID 11 /* get sempid */
#define GETVAL 12 /* get semval */
#define GETALL 13 /* get all semval's */
#define GETNCNT 14 /* get semncnt */
#define GETZCNT 15 /* get semzcnt */
#define SETVAL 16 /* set semval */
#define SETALL 17 /* set all semval's */
/* Data structure describing a set of semaphores. */
struct semid_ds
{
struct ipc_perm sem_perm; /* operation permission struct */
__time_t sem_otime; /* last semop() time */
unsigned long int __unused1;
__time_t sem_ctime; /* last time changed by semctl() */
unsigned long int __unused2;
unsigned long int sem_nsems; /* number of semaphores in set */
unsigned long int __unused3;
unsigned long int __unused4;
};
/* The user should define a union like the following to use it for arguments
for `semctl'.
union semun
{
int val; <= value for SETVAL
struct semid_ds *buf; <= buffer for IPC_STAT & IPC_SET
unsigned short int *array; <= array for GETALL & SETALL
struct seminfo *__buf; <= buffer for IPC_INFO
};
Previous versions of this file used to define this union but this is
incorrect. One can test the macro _SEM_SEMUN_UNDEFINED to see whether
one must define the union or not. */
#define _SEM_SEMUN_UNDEFINED 1
#ifdef __USE_MISC
/* ipcs ctl cmds */
# define SEM_STAT 18
# define SEM_INFO 19
struct seminfo
{
int semmap;
int semmni;
int semmns;
int semmnu;
int semmsl;
int semopm;
int semume;
int semusz;
int semvmx;
int semaem;
};
#endif /* __USE_MISC */
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