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

int main(int argc, char **argv)
{
	const pid_t pid = fork();

	if (pid < 0) {
		/* Parent could not create child. */
		perror(argv[0]);
		return EXIT_FAILURE;
	}

	if (pid == 0) {
		/* Child immediately turns itself into a zombie. */
		return EXIT_SUCCESS;
	}

	sleep(3);     /* Parent waits for child to turn itself into a zombie. */
	system("/usr/ucb/ps -gl");    /* Parent photographs the zombie child. */

	/* Parent gets rid of the zombie child. */
	if (wait(NULL) < 0) {
		perror(argv[0]);
		return EXIT_FAILURE;
	}

	return EXIT_SUCCESS;
}