/* sem_remove.c SJ */

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/sem.h>


int main(int argc, char **argv)
{
  union semun {		/* for some reason, this union is not ready */
	  int             val;
  } sem_val;

  int s, r;

  if ((argc != 2) || ((s = atoi(argv[1])) < 1 ) ) {
	  fprintf(stderr, "Usage: %s semid\n", argv[0]);
	  exit(1);
  }

  r = semctl(s, 0, IPC_RMID, sem_val);

  if (r == -1)
	  perror("semctl");

  exit(r);

}