pid_t pid;
  int status;
  if ((pid = fork())< 0){
   printf("*** ERROR: forking child process failed\n");
           exit(1);
  }
  else if (pid == 0) {          /* for the child process:         */
         if (execvp(*name, name) < 0) {     /* execute the command  */
               printf("*** ERROR: exec failed\n");
               exit(1);
         }
     }
     else {                                  /* for the parent:      */
         while (wait(&status) != pid)       /* wait for completion  */;
     }