#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
int main(int argc, char *argv[]){
  pid_t childpid, waitreturn;
  int status;
  if ((childpid = fork()) == -1) {
    perror("The fork failed");
    exit(1);
  } else if (childpid == 0) {          
    /* child code */
    if (execvp(argv[1], &argv[1]) < 0) {
      perror("The exec of command failed");
      exit(1);
    }
  } else                               
    /* parent code */
    while(childpid != (waitreturn = wait(&status)))
      if ((waitreturn == -1) && (errno != EINTR))
        break;
  exit(0);
}