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#include <iostream>
#include <fcntl.h>
#include <sys/stat.h>
#include <semaphore.h>
#include <unistd.h>
#include <cstdlib>
#include <cstring>
#include <cerrno>
 
using namespace std;
 
static void usage(char *progname);
 
int
main(int argc, char *argv[]) {
 
  if (argc != 2) usage(argv[0]);
 
  sem_t *sem;
 
  if (sem_unlink(argv[1]) == -1) {
    cerr << "Error borrando el semaforo: " <<
      strerror(errno) << endl;
    return EXIT_FAILURE;
  }
 
  return EXIT_SUCCESS;
}
 
static void usage(char *progname) {
  cerr << "Uso: " << progname
       << " <nombresem> "
       << endl;
  exit(EXIT_FAILURE);
}