1#include <sys/stat.h>
2
3#include <errno.h>
4
5sem_t* sem_open(const char* name, int flags, ...) {
6    errno = ENOSYS;
7    return SEM_FAILED;
8}
9
10int sem_close(sem_t* sem) {
11    errno = ENOSYS;
12    return -1;
13}
14