// waitpid_ex.c
// October 28, 2000
// Program to illustrate waitpid system call

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


int main()
{
  pid_t pid;
  int   status;

    // Create a child process
  if ((pid = fork()) < 0) {
    perror("fork");
    exit(1);
  }  // end if


  if (pid == 0) {
    printf("Child process created\n");
    exit(15);
  }  // end if

  else {
    // Parent process
    waitpid(pid, &status, WUNTRACED);
  }  // end else

  if (WIFEXITED(status))
     printf("PID %d exits: %d\n", pid, WEXITSTATUS(status));
  else if (WIFSTOPPED(status))
    printf("PID %d stopped by: %d\n", pid, WSTOPSIG(status));
  else if (WIFSIGNALED(status))
    printf("PID %d killed by: %d\n", pid, WTERMSIG(status));
  else
    perror("Waitpid");

  exit(0);
}   // end main