HardenedBSD/usr.sbin/sysinstall/cdrom.c

/*
 * The new sysinstall program.
 *
 * This is probably the last attempt in the `sysinstall' line, the next
 * generation being slated to essentially a complete rewrite.
 *
 * $FreeBSD$
 *
 * Copyright (c) 1995
 *	Jordan Hubbard.  All rights reserved.
 * Copyright (c) 1995
 * 	Gary J Palmer. 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.
 *
 */

/* These routines deal with getting things off of CDROM media */

#include "sysinstall.h"
#include <sys/stat.h>
#include <sys/errno.h>
#include <sys/param.h>
#include <sys/wait.h>
#include <unistd.h>
#include <grp.h>
#include <fcntl.h>
#include <libutil.h>

#define CD9660
#include <sys/mount.h>
#include <isofs/cd9660/cd9660_mount.h>
#undef CD9660

static Boolean cdromMounted;
static char mountpoint[] = "/dist";

static properties
read_props(char *name)
{
	int fd;
	properties n;

	fd = open(name, O_RDONLY);
	if (fd == -1)
	    return NULL;
	n = properties_read(fd);
	close(fd);
	return n;
}

Boolean
mediaInitCDROM(Device *dev)
{
    struct iso_args	args;
    properties cd_attr = NULL;
    char *cp = NULL;
    Boolean readInfo = TRUE;
    static Boolean bogusCDOK = FALSE;

    if (cdromMounted)
	return TRUE;

    Mkdir(mountpoint);
    bzero(&args, sizeof(args));
    args.fspec = dev->devname;
    args.flags = 0;
    if (mount("cd9660", mountpoint, MNT_RDONLY, (caddr_t) &args) == -1) {
	if (errno == EINVAL) {
	    msgConfirm("The CD in your drive looks more like an Audio CD than a FreeBSD release.");
	    return FALSE;
	}
	else if (errno != EBUSY) {
	    msgConfirm("Error mounting %s on %s: %s (%u)", dev->devname, mountpoint, strerror(errno), errno);
	    return FALSE;
	}
    }
    cdromMounted = TRUE;

    if (!file_readable(string_concat(mountpoint, "/cdrom.inf")) && !bogusCDOK) {
	if (msgYesNo("Warning: The CD currently in the drive is either not a FreeBSD\n"
		     "CD or it is an older (pre 2.1.5) FreeBSD CD which does not\n"
		     "have a version number on it.  Do you wish to use this CD anyway?") != 0) {
	    unmount(mountpoint, MNT_FORCE);
	    cdromMounted = FALSE;
	    return FALSE;
	}
	else {
	    readInfo = FALSE;
	    bogusCDOK = TRUE;
	}
    }

    if (readInfo) {
	if (!(cd_attr = read_props(string_concat(mountpoint, "/cdrom.inf")))
	    || !(cp = property_find(cd_attr, "CD_VERSION"))) {
	    msgConfirm("Unable to find a %s/cdrom.inf file.\n"
		       "Either this is not a FreeBSD CDROM, there is a problem with\n"
		       "the CDROM driver or something is wrong with your hardware.\n"
		       "Please fix this problem (check the console logs on VTY2) and\n"
		       "try again.", mountpoint);
	}
	else {
	    if (variable_cmp(VAR_RELNAME, cp)
		&& variable_cmp(VAR_RELNAME, "none")
		&& variable_cmp(VAR_RELNAME, "any") && !bogusCDOK) {
		msgConfirm("Warning: The version of the FreeBSD CD currently in the drive\n"
			   "(%s) does not match the version of the boot floppy\n"
			   "(%s).\n\n"
			   "If this is intentional, to avoid this message in the future\n"
			   "please visit the Options editor to set the boot floppy version\n"
			   "string to match that of the CD before selecting it as your\n"
			   "installation media.", cp, variable_get(VAR_RELNAME));

		if (msgYesNo("Would you like to try and use this CDROM anyway?") != 0) {
		    unmount(mountpoint, MNT_FORCE);
		    cdromMounted = FALSE;
		    properties_free(cd_attr);
		    return FALSE;
		}
		else
		    bogusCDOK = TRUE;
	    }
	    if ((cp = property_find(cd_attr, "CD_MACHINE_ARCH")) != NULL) {
#ifdef __alpha__
		if (strcmp(cp, "alpha")) {
#else
		if (strcmp(cp, "x86")) {
#endif
		    msgConfirm("Fatal: The FreeBSD install CD currently in the drive\n"
			   "is for the %s architecture, not the machine you're using.\n\n"

			   "Please use the correct installation CD for your machine type.", cp);

		    unmount(mountpoint, MNT_FORCE);
		    cdromMounted = FALSE;
		    properties_free(cd_attr);
		    return FALSE;
		}
	    }
	}
    }
    if (cd_attr)
	properties_free(cd_attr);
    return TRUE;
}

FILE *
mediaGetCDROM(Device *dev, char *file, Boolean probe)
{
    return mediaGenericGet(mountpoint, file);
}

void
mediaShutdownCDROM(Device *dev)
{
    if (!cdromMounted)
	return;

    if (unmount(mountpoint, MNT_FORCE) != 0)
	msgConfirm("Could not unmount the CDROM from %s: %s", mountpoint, strerror(errno));
    else
	cdromMounted = FALSE;
}