/usr/include/x86_64-linux-musl/semaphore.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 | #ifndef _SEMAPHORE_H
#define _SEMAPHORE_H
#ifdef __cplusplus
extern "C" {
#endif
#include <features.h>
#define __NEED_time_t
#define __NEED_struct_timespec
#include <bits/alltypes.h>
#include <fcntl.h>
#define SEM_FAILED ((sem_t *)0)
typedef struct {
int __val[4*sizeof(long)/sizeof(int)];
} sem_t;
int sem_close(sem_t *);
int sem_destroy(sem_t *);
int sem_getvalue(sem_t *__restrict, int *__restrict);
int sem_init(sem_t *, int, unsigned);
sem_t *sem_open(const char *, int, ...);
int sem_post(sem_t *);
int sem_timedwait(sem_t *__restrict, const struct timespec *__restrict);
int sem_trywait(sem_t *);
int sem_unlink(const char *);
int sem_wait(sem_t *);
#ifdef __cplusplus
}
#endif
#endif
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