#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <semaphore.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
 
int main(void)
{
	sem_t *sem1;

	sem1 = sem_open("nimeni", O_CREAT | O_EXCL, 0666, 1);
	if (sem1 == NULL) {
		printf("error opening semaphore: %s\n", strerror(errno));
		return EXIT_FAILURE;
	}

	return EXIT_SUCCESS;
}