/* sem_remove.c SJ */

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


int main(int argc, char **argv)
{

  int s, r, smid;
  struct shmid_ds smdesc;

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

  r = shmctl(s, IPC_RMID, &smdesc);

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

  exit(r);

}