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

int main()
{
    pid_t child_pid, pid;

	int	status;

	switch (child_pid=fork()) 
	{

		case (pid_t)-1:	perror("fork"); 	/* fork fails */
				break;
		case (pid_t)0:	printf("Child process created\n");
				_exit(15);	/* terminate child */
		default:	printf("Parent process after fork\n");
				pid = waitpid(child_pid,&status,WUNTRACED);

	}

	if (WIFEXITED(status))
	  fprintf(stderr, "%d  exits: %d \n",  child_pid ,WEXITSTATUS(status)); 
	else if (WIFSTOPPED(status)) 
          fprintf(stderr, "%d  stopped by  %d \n",  child_pid,WSTOPSIG(status));
	 else if (WIFSIGNALED(status))
          fprintf(stderr, "%d  killed by  %d \n",  child_pid,WTERMSIG(status)); 
	else perror("waitpid");
	
	_exit(0);
	

}

/* The output should be:

% cc -o test_waitpid test_waitpid.c
% test_waitpid
child process created
1354 exits: 15

*/