#include <common.h>

int
main(void) {
        sem_t id;

        if (sem_init(&id, 0, 0) < 0) {
                perror("sem_init");
                return 1;
        }

        /* This should fail with EAGAIN and leave the value at 0. */
        if (sem_trywait(&id) >= 0) {
                sem_destroy(&id);
                return 1;
        }
        if (errno != EAGAIN) {
                perror("wrong error from sem_trywait()");
                sem_destroy(&id);
                return 1;
        }
        if (checkvalue(&id, 0) < 0) {
                sem_destroy(&id);
                return 1;
        }

        if (sem_destroy(&id) < 0) {
                perror("sem_destroy");
                return 1;
        }
        return 0;
}