#!/usr/bin/perl

#
# Guillaume Cottenceau (gc@mandrakesoft.com)
#
# Copyright 2001 MandrakeSoft
#
# This software may be freely redistributed under the terms of the GNU
# public license.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#


sub cat_ { local *F; open F, $_[0] or $_[1] ? die "cat of file $_[0] failed: $!\n" : return; my @l = <F>; wantarray ? @l : join '', @l }


#- start
system('drvinst'); #- class2text seems broken, I can't detect easily only modules for SCSI storage :-(

print "\nPlease wait, trying to find your root device...\n";

my $target = '/mnt/sysimage';
(-d $target) or mkdir($target) or die "couldn't create $target\n";


my @parts = cat_('/proc/partitions');
splice @parts, 0, 2; #- doesn't contain partitions

my @fstab;
my $root;

for my $dirtypart (@parts) {
    next if $dirtypart !~ /^\s*\w+\s+\w+\s+\w+\s+(\w+)\s/;
    my $dev = "/dev/$1";

    for my $fs ('ext2', 'reiserfs') {
	my $where = $target;
	if (!system("mount -t $fs $dev $where 2>/dev/null")) {
	    if (-f "$where/etc/fstab") {
		print "Found a probable root partition on $dev (type $fs)\n";
		@fstab = cat_("$where/etc/fstab");
		$root = $dev;
	    } else {
		system('umount', $where) and die "error unmounting $mntpoint: $!\n";
	    }
	    last;
	}
    }
    last if @fstab;
}

if ($root) {
    print "\nMounting other partition from fstab on $target...\n";
    for my $fstabline (@fstab) {
	my ($dev, $where, $type, $opts) = $fstabline =~ /^(\S+)\s+(\S+)\s+(\S+)\s+(\S+)\s/;
	next if (!$type || $dev eq 'none' || $where eq '/' || $type eq 'supermount' ||
		 $type eq 'swap' || $type eq 'nfs' || $where =~ /cdrom/ ||
		 $where =~ /floppy/ || $opts =~ /noauto/ || $where =~ /proc/ ||
		 $where =~ /mnt\/zip/);
	$opts = join(',', grep { !/codepage=/ && !/iocharset/ } split(/,/, $opts)); #- vfat opts, we don't have the modules in rescue
	$where = "/mnt/sysimage$where";
	(-d $where) or mkdir($where) or die "couldn't create $where\n";
	print "Mounting $dev on $where type $type\n";
	system("mount -t $type $dev $where -o $opts");
    }
    print "Your partitions are mounted on $target.\n".
	  "For example you can use 'chroot $target' to simulate your system.\n".
	  "(you can reinstall lilo that way if necessary).\n\n";
}


#-------------------------------------------------
#- $Log$
#- Revision 1.1  2001/06/10 21:08:33  gc
#- - add 'guessmounts' that mimics RH's detecting of partitions when rescue starts
#-
#-