#include <stdlib.h>
#include <unistd.h>
#include <iostream>
#include <stdio.h>
using namespace std;
main() {
  char command[100];
  char *argv[10]; 
  int ret;
  strcpy(command, "/bin/ls");
  argv[0] = command;
  argv[1] = "--color=tty";
  argv[2] = "/";
  argv[3] = NULL;
  ret = execv(command, argv);
  cout << "finished, ret = " << ret << "\n";
}