#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <errno.h>

#include <sys/types.h>
#include <sys/wait.h>

int main(void)
{
  pid_t pid;
  int status;

  printf("parent : %d\n", getpid());

  pid = fork();

  if (pid == 0) {
    char* argv[] = {"/bin/bash", 0};
    printf("child : %d\n", getpid());
    execv(argv[0], argv);
    perror(strerror(errno));
  }

  /* in parent */
  waitpid(pid, &status, 0);
  printf("Child exited with status %d\n", status);
  printf("Parent exiting\n");
}