HardenedBSD/sbin/sysinstall/main.c

/*
 * ----------------------------------------------------------------------------
 * "THE BEER-WARE LICENSE" (Revision 42):
 * <phk@login.dkuug.dk> wrote this file.  As long as you retain this notice you
 * can do whatever you want with this stuff. If we meet some day, and you think
 * this stuff is worth it, you can buy me a beer in return.   Poul-Henning Kamp
 * ----------------------------------------------------------------------------
 *
 * $Id: main.c,v 1.6 1994/10/21 02:14:50 phk Exp $
 *
 */

#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <unistd.h>
#include <setjmp.h>
#include <fcntl.h>

#include <dialog.h>

#include <sys/ioctl.h>
#include <sys/reboot.h>

#define EXTERN /* only in main.c */

#include "sysinstall.h"

jmp_buf	jmp_restart;

/*
 * This is the overall plan:  (phk's version)
 *  
 * If (pid == 1)
 *	reopen stdin, stdout, stderr, and do various other magic.
 *
 * If (file exists /this_is_boot.flp)
 *	stage0:
 *		present /README
 *      stage1:
 *		Ask about diskallocation and do the fdisk/disklabel stunt.
 *	stage2:
 *		Do newfs, mount and copy over a minimal world.
 *		make /mnt/etc/fstab.  Install ourself as /mnt/sbin/init
 * Else
 *	stage3:
 *		Read cpio.flp and fiddle around with the bits a bit.
 *	stage4:
 *		Read bin-tarballs:
 *			Using ftp
 *			Using NFS (?)
 *			Using floppy
 *			Using tape
 *			Using shell-prompt
 *	stage5:
 *		Extract bin-tarballs
 *	stage6:
 *		Ask various questions and collect answers into system-config
 *		files.
 *	stage7:
 *		execl("/sbin/init");
 */

extern int alloc_memory();

int
main(int argc, char **argv)
{
	int i;

	/* Are we running as init? */
	if (getpid() == 1) {
		close(0); open("/dev/console",O_RDWR);
		close(1); dup(0);
		close(2); dup(0);
		i = 1;
		ioctl(0,TIOCSPGRP,&i);
		setlogin("root");
	}

	if (set_termcap() == -1) {
		Fatal("Can't find terminal entry\n");
	}
	/* XXX too early to use fatal ! */

	/* XXX - libdialog has particularly bad return value checking */
	init_dialog();
	/* If we haven't crashed I guess dialog is running ! */
	dialog_active = 1;

	if (alloc_memory() < 0)
		Fatal("No memory\n");

	setjmp(jmp_restart);  /* XXX Allow people to "restart" */

	if (getenv("STAGE0") || !access("/this_is_boot_flp",R_OK)) {
		stage0();
		stage1();
		stage2();
		reboot(RB_AUTOBOOT);
	} else if (getenv("STAGE3") || !access("/this_is_hd",R_OK)) {
		stage3();
	} else {
		Fatal("Must setenv STAGE0 or STAGE3");
	}
	return 0;
}