/usr/include/diet/sys/sem.h is in dietlibc-dev 0.33~cvs20120325-6+deb8u1.
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 | #ifndef _SYS_SEM_H
#define _SYS_SEM_H
#include <sys/ipc.h>
__BEGIN_DECLS
/* semop flags */
#define SEM_UNDO 0x1000 /* undo the operation on exit */
/* semctl Command Definitions. */
#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 */
/* ipcs ctl cmds */
#define SEM_STAT 18
#define SEM_INFO 19
struct semid_ds {
struct ipc_perm sem_perm; /* permissions .. see ipc.h */
time_t sem_otime; /* last semop time */
time_t sem_ctime; /* last change time */
struct sem *sem_base; /* ptr to first semaphore in array */
struct sem_queue *sem_pending; /* pending operations to be processed */
struct sem_queue **sem_pending_last; /* last pending operation */
struct sem_undo *undo; /* undo requests on this array */
uint16_t sem_nsems; /* no. of semaphores in array */
};
/* semop system calls takes an array of these. */
struct sembuf {
uint16_t sem_num; /* semaphore index in array */
int16_t sem_op; /* semaphore operation */
int16_t sem_flg; /* operation flags */
};
/* please complain to the glibc goons for the following misbehaviour */
#if 0
/* arg for semctl system calls. */
union semun {
int val; /* value for SETVAL */
struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */
unsigned short *array; /* array for GETALL & SETALL */
struct seminfo *__buf; /* buffer for IPC_INFO */
void *__pad;
};
#endif
#define _SEM_SEMUN_UNDEFINED
struct seminfo {
int32_t semmap;
int32_t semmni;
int32_t semmns;
int32_t semmnu;
int32_t semmsl;
int32_t semopm;
int32_t semume;
int32_t semusz;
int32_t semvmx;
int32_t semaem;
};
#define SEMMNI 128 /* <= IPCMNI max # of semaphore identifiers */
#define SEMMSL 250 /* <= 8 000 max num of semaphores per id */
#define SEMMNS (SEMMNI*SEMMSL) /* <= INT_MAX max # of semaphores in system */
#define SEMOPM 32 /* <= 1 000 max num of ops per semop call */
#define SEMVMX 32767 /* <= 32767 semaphore maximum value */
extern int semget( key_t key, int nsems, int semflg) __THROW;
/* The prototype really is:
* extern int semctl(int semid, int semnum, int cmd, union semun arg) __THROW;
* glibc bug compatibility forces us to write it like this: */
extern int semctl(int semid, int semnum, int cmd, ...) __THROW;
extern int semop(int semid, struct sembuf *sops, unsigned nsops) __THROW;
__END_DECLS
#endif
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