#include <err.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/procdesc.h>
#include <sys/time.h>
#include <sys/resource.h>
#include <sys/wait.h>
#include <unistd.h>

int main(int argc, char **argv)
{
	pid_t pid;
	int fd;

	if (argc > 1 && strcmp(argv[1], "-p") == 0) {
		pid = pdfork(&fd, 0);
	} else {
		pid = fork();
	}

	if (pid == 0) {
		sleep(1);
		exit(0);
	} else if (pid < 0) {
		err(1, "fork() failed");
	} else {
		int status;
		int error = wait4(pid, &status, WEXITED, NULL);
		if (error < 0)
			err(1, "wait4 failed");
		exit(status);
	}
}