#include <semaphore.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/mman.h>

int main(int argc, char **argv)
{
    sem_t *semafor1;
    sem_t *semafor2;

    sem_close(semafor1);
    sem_close(semafor2);
    sem_unlink("/semafor1");
    sem_unlink("/semafor2");

    semafor1 = sem_open("/semafor1", O_RDWR|O_CREAT|O_EXCL, 0660, 0);
    if(semafor1==SEM_FAILED){
        perror("problem pri ustvarjanju semaforja1");
        return -1;
    }

    semafor2 = sem_open("/semafor2", O_RDWR|O_CREAT|O_EXCL, 0660, 0);
    if(semafor2==SEM_FAILED){
        perror("problem pri ustvarjanju semaforja2");
        return -1;
    }

  int i;

  if (fork()==0) {

    for (i = 0; i < 5; i++) {
      sem_wait(&semafor1);
      printf("%d : prvi\n", getpid());
    }
    exit(0);
  }
  else{
        if (fork()==0) {
		      for (i = 0; i < 5; i++) {
        		sem_wait(&semafor1);
        		printf("%d : drugi\n", getpid());
				sem_post();
      			}
			exit(0);
  		}
		else{
			wait(0);
		}
		wait(0)
  }

    sem_close(semafor1);
    sem_close(semafor2);
    sem_unlink("/semafor1");
    sem_unlink("/semafor2");

    return EXIT_SUCCESS;
}