/usr/include/x86_64-linux-musl/sys/sem.h is in musl-dev 0.9.15-1.
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 | #ifndef _SYS_SEM_H
#define _SYS_SEM_H
#ifdef __cplusplus
extern "C" {
#endif
#include <features.h>
#define __NEED_size_t
#define __NEED_pid_t
#define __NEED_time_t
#ifdef _GNU_SOURCE
#define __NEED_struct_timespec
#endif
#include <bits/alltypes.h>
#include <sys/ipc.h>
#define SEM_UNDO 0x1000
#define GETPID 11
#define GETVAL 12
#define GETALL 13
#define GETNCNT 14
#define GETZCNT 15
#define SETVAL 16
#define SETALL 17
#include <endian.h>
struct semid_ds {
struct ipc_perm sem_perm;
long sem_otime;
unsigned long __unused1;
long sem_ctime;
unsigned long __unused2;
#if __BYTE_ORDER == __LITTLE_ENDIAN
unsigned short sem_nsems;
char __sem_nsems_pad[sizeof(long)-sizeof(short)];
#else
char __sem_nsems_pad[sizeof(long)-sizeof(short)];
unsigned short sem_nsems;
#endif
unsigned long __unused3;
unsigned long __unused4;
};
#define _SEM_SEMUN_UNDEFINED 1
#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;
};
struct sembuf {
unsigned short sem_num;
short sem_op;
short sem_flg;
};
int semctl(int, int, int, ...);
int semget(key_t, int, int);
int semop(int, struct sembuf *, size_t);
#ifdef _GNU_SOURCE
int semtimedop(int, struct sembuf *, size_t, const struct timespec *);
#endif
#ifdef __cplusplus
}
#endif
#endif
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