#include <common.h>

int
main(void) {
        sem_t *id;

        /*
         * Create named semaphore with value of 1 and then unlink it
         * while still retaining the initial reference.
         */
        id = sem_open(TEST_PATH, O_CREAT | O_EXCL, 0777, 1);
        if (id == SEM_FAILED) {
                perror("sem_open(O_CREAT | O_EXCL)");
                return 1;
        }
        if (sem_unlink(TEST_PATH) < 0) {
                perror("sem_unlink");
                sem_close(id);
                return 1;
        }
        if (checkvalue(id, 1) < 0) {
                sem_close(id);
                return 1;
        }

        /* Post the semaphore to set its value to 2. */
        if (sem_post(id) < 0) {
                perror("sem_post");
                sem_close(id);
                return 1;
        }
        if (checkvalue(id, 2) < 0) {
                sem_close(id);
                return 1;
        }

        /* Wait on the semaphore which should set its value to 1. */
        if (sem_wait(id) < 0) {
                perror("sem_wait");
                sem_close(id);
                return 1;
        }
        if (checkvalue(id, 1) < 0) {
                sem_close(id);
                return 1;
        }

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