/* $Id: getpid.c,v 1.1 2014/10/02 11:13:10 kostik Exp kostik $ */

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

#ifdef UNISTD_H_NOTUPDATED
int forkdepth(u_int *);
#endif

static void
print_pids(const char *s)
{
	pid_t my, parent;
	u_int depth;
	int error;

	my = getpid();
	parent = getppid();
	if (s != NULL)
		printf("%s: ", s);
	printf("me %d parent %d", my, parent);
	error = forkdepth(&depth);
	if (error != 0)
		printf("\nforkdepth failed: %s\n", strerror(error));
	else
		printf(" depth %d\n", depth);
}

int
main(void)
{
	pid_t child;

	print_pids("main");
	fflush(stdout);
	child = fork();
	if (child == -1)
		err(1, "fork failed");
	else if (child == 0) {
		print_pids("child");
		exit(0);
	} else {
		printf("main: child %d ", child);
		print_pids(NULL);
	}
	return (0);
}