/* Simply C program to act as init. */
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <grp.h>
#include <sys/reboot.h>
#include <linux/reboot.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <fcntl.h>

static int wait_for(const char *prog)
{
	int status;

	wait(&status);
	if (!WIFEXITED(status) || WEXITSTATUS(status) != 0) {
		fprintf(stderr, "run: %s failed\n", prog);
		return 0;
	}
	return 1;
}

int main(int argc, char *argv[])
{
	if (fork() == 0) {
		execl("/ifconfig", "ifconfig", "eth0", "192.168.1.2", NULL);
		fprintf(stderr, "run: ifconfig exec failed\n");
		exit(1);
	}
	if (!wait_for("ifconfig"))
		goto reboot;

	if (fork() == 0) {
		execl("/route", "route", "add", "default", "gw", "192.168.1.1",
		      NULL);
		fprintf(stderr, "run: route exec failed\n");
		exit(1);
	}
	if (!wait_for("route"))
		goto reboot;

	/* tetrinet does DNS lookup on own hostname */
	sethostname("ozlabs.org", strlen("ozlabs.org"));

	if (fork() == 0) {
		setgroups(0, NULL);
		/* Games/games */
		setgid(60);
		setuid(5);
		close(0);
		close(1);
		close(2);
		open("/dev/null", O_RDWR);
		open("/dev/null", O_RDWR);
		open("/dev/null", O_RDWR);
		execl("/tetrinetx", "tetrinetx", NULL);
		exit(1);
	}
	if (!wait_for("tetrinetx"))
		goto reboot;

	/* Drop privs, why not? */
	setgroups(0, NULL);
	setgid(65534);
	setuid(65534);
	close(0);
	close(1);
	close(2);

	while (wait(NULL) >= 0);

reboot:
	sync();
	reboot(LINUX_REBOOT_CMD_RESTART);
	sleep(60);
	return 1;
}