freebsd-skq/usr.sbin/sysinstall/main.c

/*
 * The new sysinstall program.
 *
 * This is probably the last attempt in the `sysinstall' line, the next
 * generation being slated for what's essentially a complete rewrite.
 *
 * $Id: main.c,v 1.21 1996/06/08 07:02:20 jkh Exp $
 *
 * Copyright (c) 1995
 *	Jordan Hubbard.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer,
 *    verbatim and that no modifications are made prior to this
 *    point in the file.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY JORDAN HUBBARD ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL JORDAN HUBBARD OR HIS PETS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, LIFE OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */

#include "sysinstall.h"
#include <stdio.h>
#include <sys/signal.h>

static void
screech(int sig)
{
    fprintf(stderr, "\007Fatal signal %d caught!  I'm dead..\n", sig);
    if (RunningAsInit)
	pause();
    else
	exit(1);
}

int
main(int argc, char **argv)
{
    int choice, scroll, curr, max;

    /* Catch fatal signals and complain about them if running as init */
    if (getpid() == 1) {
	signal(SIGBUS, screech);
	signal(SIGSEGV, screech);
    }

    /* We don't work too well when running as non-root anymore */
    if (geteuid() != 0) {
	fprintf(stderr, "Error: This utility should only be run as root.\n");
	return 1;
    }

    /* Set up whatever things need setting up */
    systemInitialize(argc, argv);

    /* Set default flag and variable values */
    installVarDefaults(NULL);

    if (argc > 1 && !strcmp(argv[1], "-fake")) {
	variable_set2(VAR_DEBUG, "YES");
	Fake = TRUE;
	msgConfirm("I'll be just faking it from here on out, OK?");
	--argc, ++argv;
    }

    /* Try to preserve our scroll-back buffer */
    if (OnVTY)
	for (curr = 0; curr < 25; curr++)
	    putchar('\n');

    /* Probe for all relevant devices on the system */
    deviceGetAll();

    /* Try to set ourselves up as a CDROM if we can do that first */
    if (DITEM_STATUS(mediaSetCDROM(NULL)) == DITEM_SUCCESS) {
	/* If we can't initialize it, it's probably not a FreeBSD CDROM so punt on it */
	if (!mediaDevice->init(mediaDevice))
	    mediaDevice = NULL;
    }

    /* First, see if we have any arguments to process (and argv[0] counts if it's not "sysinstall") */
    if (!RunningAsInit) {
	int i, start_arg;

	if (!strstr(argv[0], "sysinstall"))
	    start_arg = 0;
	else
	    start_arg = 1;
	for (i = start_arg; i < argc; i++) {
	    if (DITEM_STATUS(dispatchCommand(argv[i])) != DITEM_SUCCESS)
		systemShutdown(1);
	}
	if (argc > start_arg)
	    systemShutdown(0);
    }

    /* Begin user dialog at outer menu */
    while (1) {
	choice = scroll = curr = max = 0;
	dmenuOpen(&MenuInitial, &choice, &scroll, &curr, &max);
	if (getpid() != 1 || !msgYesNo("Are you sure you wish to exit?  The system will reboot\n"
				       "(be sure to remove any floppies from the drives)."))
	    break;
    }

    /* Say goodnight, Gracie */
    systemShutdown(0);

    return 0; /* We should never get here */
}