This file is indexed.

/usr/sbin/liloconfig is in lilo 1:23.2-2.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
#!/usr/bin/perl -w

#       liloconfig -  creating a new lilo.conf file
#       
#       Copyright 2011 Joachim Wiedorn <ad_debian@joonet.de>
#       
#       This program is free software; you can redistribute it and/or modify
#       it under the terms of the GNU General Public License as published by
#       the Free Software Foundation; either version 2 of the License, or
#       (at your option) any later version.
#       
#       This program is distributed in the hope that it will be useful,
#       but WITHOUT ANY WARRANTY; without even the implied warranty of
#       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#       GNU General Public License for more details.
#       
#       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., 51 Franklin Street, Fifth Floor, Boston,
#       MA 02110-1301, USA.

#---- some modules
use strict;
use warnings;
use Getopt::Std;
use Pod::Usage;
use File::Copy;


#---- global variables
my $prog = $0;
$prog =~ s#.*/##;
my $version = "0.1";

#---- parameter check
# h: help, v: verbose, f: force
our $opt_h = 0;
our $opt_v = 0;
our $opt_f = 0;
getopts('hvf');
# define perldoc usage
pod2usage(1) if $opt_h;

#---- other variables
our $liloconf  = "/etc/lilo.conf";
our $conftmp_1 = "/tmp/lilotmp1";
our $conftmp_2 = "/tmp/lilotmp2";
our $liloconfold = $liloconf . ".old";
our $liloconfnew = $liloconf . ".new";
our $fstabconf = "/etc/fstab";

our $idpath = "/dev/disk/by-id";
our $uuidpath = "/dev/disk/by-uuid";
our $lblpath = "/dev/disk/by-label";
our $template = "/usr/share/doc/lilo/examples/lilo.example.conf.gz";

our $rootpart;    # found root part
our $root_dev;    # /dev/hdX9, /dev/sdX9, /dev/md/*
our $root_id;     # UUID, LABEL, ID
our $boot_dev;    # /dev/hdX, /dev/sdX, /dev/md
our $boot_id;     # DISK-ID

#-------------------- main program --------------------

sub main {

	my $exit = 0;

	if (@ARGV == 1) {
		$liloconf = "$ARGV[0]";
		$liloconfold = $liloconf . ".old";
		$liloconfnew = $liloconf . ".new";
	}
	if (-f $liloconf and not $opt_f) {
		print "$prog: $liloconf already exist! Please use '-f' for overwriting.\n";
		$exit = 1;
	}
	else {
		$exit = create_lilo_conf()
	}		
	return $exit;
}

#-------------------- subroutines --------------------

sub create_lilo_conf {
	
	my $found = 0;
	my $exit = 1;

	# search for root device in fstab and convert it
	$found = detect_root_device();

	# convert root device to boot device
	if ($found) { $found = convert_boot_device(); }

	# finally write new lilo.conf file
	if ($found) { $exit = write_lilo_conf(); }

	return $exit;
}

sub detect_root_device {
	
	# read fstab and find root device; 
	my $found = read_fstab();

	# identify root device: root_dev and root_id
	if ($found) { $found = convert_root_device(); }
	
	return $found;
}

sub read_fstab {
	
	my $root_part;
	my $mountpoint;
	my $broken_fstab = 1;
	my $base_fstab = 0;
	my $found = 1;

	# check fstab for root device
	if (-f $fstabconf) {
		# Parsing fstab for the root partition
		open(FSTAB, "<$fstabconf") or die "$prog: couldn't open $fstabconf: $!\n";

		while (<FSTAB>) {
			# Search magic string which indicates a base filesystem
			$base_fstab = 1 if /^# UNCONFIGURED FSTAB FOR BASE SYSTEM/;
			next if /^#/;	  # ignore comment lines

			s/^[ \t]+//;	  # remove space or tab at begin of the line
			($root_part,$mountpoint) = split(/[ \t]+/);
			next unless defined $mountpoint;    # ignore empty lines too

			# stop if we found the root device...
			if ($mountpoint eq '/') {
				$broken_fstab = 0;
				last;
			}
		}
		close(FSTAB) or die "$prog: couldn't close $fstabconf: $!\n";
	}

	if ($base_fstab) {
		print "E: It seems you want configure the base filesystem \n" .
		      "and I'm therefore simply going to exit successfully \n" .
		      "without trying to actually configure LILO properly. \n";
		$found = 0;
	}
	if ($broken_fstab) {
		print "E: It seems the file /etc/fstab is not properly \n" .
		      "configured: no root partition '/' found! \n";
		$found = 0;
	}
	# save the found root device
	$rootpart = $root_part;

	return $found;
}

sub convert_root_device {
	
	my $found = 1;
	my $root_disk = '';
	my $root_link;
	# global variables: $root_dev, $root_id

	if ($rootpart =~ /\/dev\//) {
		$root_disk = $rootpart;

		if (-b $root_disk) {
			$root_dev = $root_disk;
			if($opt_v) { print "Convert root option $root_disk into UUID\n"; }
			$root_id = find_id_link($root_disk,$uuidpath);

			if (not -l "$uuidpath/$root_id") {
				if($opt_v) { print "W: could not find UUID for $root_disk!\n"; }
				## than we want use root_dev in lilo.conf
				#$found = 0;
			}
			else {
				# finally add uuid label
				$root_id = "UUID=" . $root_id;
			}
		}
		else {
			if($opt_v) { print "E: cannot check $root_disk: device does not exist!\n"; }
			$found = 0;
		}
	}
	elsif ($rootpart =~ /^UUID/ or $rootpart =~ /^LABEL/) {
		$root_link = $rootpart;
		$root_link =~ s{\"}{}g;
		$root_link =~ s{^LABEL=}{/dev/disk/by-label/};
		$root_link =~ s{^UUID=}{/dev/disk/by-uuid/};

		if (-l $root_link) {
			$root_id = $rootpart;
			$root_disk = readlink($root_link);
			$root_disk =~ s{\.\./\.\./}{/dev/};

			if (-b $root_disk) { $root_dev = $root_disk; }
			else {
				if($opt_v) { print "E: cannot check $root_link: link does not exist!\n"; }
				$found = 0;
			}
		}
		else {
			print "E: cannot check $root_link: link does not exist!\n";
			$found = 0;
		}
	}
	else {
		print "E: cannot use uncommon $rootpart found as root device!\n";
		$found = 0;
	}

	return $found;
}

sub find_id_link {
	
	my $olddev = $_[0];
	my $path_id = $_[1];
	my @sellinks;
	my $_idlink;
	my $_actlink;
	my $newdevid = '';

	opendir(MYDH, "$path_id") or die("cannot open $path_id: $! \n");
	@sellinks = grep(!/\-part\d\d?$/, grep(!/^\.\.?$/, readdir(MYDH)));
	@sellinks = sort(@sellinks);
	closedir(MYDH);

	foreach $_idlink (@sellinks) {
		chomp $_idlink;
		if(not $_idlink =~ /^usb/ and length($_idlink) > 10) {
			$_actlink = readlink("$path_id/$_idlink");
			$_actlink =~ s{\.\./\.\./}{/dev/};
			if($opt_v) { print "** try: $_actlink => $_idlink \n"; }
			
			# stop if we find the right link...
			if($_actlink eq $olddev) {
				$newdevid = $_idlink;
				if($opt_v) { print "** convert: $_actlink => $path_id/$_idlink \n\n"; }
				last;
			}
		}
	}

	if(not $newdevid) {
		if($opt_v) { print "W: $olddev not converted: link not useful\n\n"; }
	}
	
	return ($newdevid);
}

sub convert_boot_device {

	my $found = 1;
	my $boot_disk = '';
	my $boot_link;
	# global variables: $boot_dev, $boot_id

	if (-b $root_dev) {
		if ($root_dev =~ /\/dev\/md/) {
			# search if the found partition is a raid volume
			$boot_disk = check_raid($root_dev);
		}
		else {
			# find the right block device name
			$boot_disk = $root_dev;
			$boot_disk =~ s/\d+$//;
		}

		if (-b $boot_disk) {
			# set global variable boot_dev
			$boot_dev = $boot_disk;
		}
		else { 
			print "E: boot device $boot_disk does not exist! \n";
			$found = 0;
		}
	}
	else {
		print "E: could not find root device $root_dev! \n";
		$found = 0;
	}

	if ($found) {
		if($opt_v) { print "Convert boot option $boot_disk into DISK ID\n"; }
		$boot_id = $idpath . "/" . find_id_link($boot_disk,$idpath);

		if(not -l "$boot_id") {
			if($opt_v) { print "W: could not find DISK ID for $boot_disk!\n"; }
			## not so important, than using boot_dev in lilo.conf
			#$found = 0;
		}
	}

	return $found;
}

sub check_raid {
	
	my $part = $_[0];
	my $mdname;
	my $md;
	my @devices;

	# check if the found partition is a raid volume
	if($part =~ /\/dev\/md/)
	{
		$mdname = $part;
		$mdname =~ s/\/dev\///;
		$mdname =~ s/\///;
		$md = `grep $mdname /proc/mdstat`;
	
		@devices = split(" ", $md);
		@devices = sort(@devices[4..$#devices]);
		$part = "/dev/" . $devices[0];
		$part =~ s/\[.*$//;

	}
	return $part;
}

sub write_lilo_conf {
	
	my @status;
	my $exit = copy_template();

	if (not $exit) {
		# create lilo.conf.new
		write_boot_option();
		write_image_config();
	}

	if (-f $liloconf and not -f $liloconfold) {
		# move old lilo.conf to lilo.conf.old
		@status = stat($liloconf);
		move ($liloconf, $liloconfold) or die "Cannot rename file: $!\n";
		utime ($status[9],$status[9],$liloconfold);
		chmod (0600,$liloconfold);
		print "Old file moved to: $liloconfold \n";
	}
	if (-f $liloconfnew) {
		move ($liloconfnew, $liloconf) or die "Cannot move file: $!\n";
		chmod (0600,$liloconf);
		print "New file created as: $liloconf \n";
		print "Now you must execute '/sbin/lilo' to " . 
		      "activate this new configuation!\n\n";
	}
	else {
		print "E: Cannot find temporary file $conftmp_1!\n";
		$exit = 1;
	}
	
	return $exit;
}

sub copy_template {

	my $endreached = 0;
	my $exit = 0;
	
	# copy template config
	if (-f $template) {
		system("gzip -d -c $template >$conftmp_1") if ($template =~ /\.gz$/);
		system("cat $template >$conftmp_1") if ($template =~ /\.conf$/);

		open(CONFTMP1, "<$conftmp_1") or die "$prog: couldn't open $conftmp_1: $!\n";
		open(CONFTMP2, ">$conftmp_2") or die "$prog: couldn't open $conftmp_2: $!\n";

		while (<CONFTMP1>) {
			if (/first\ example/) {
				$endreached = 1;
			}
			unless ($endreached) {
				print CONFTMP2 $_;
			}
		}
		close(CONFTMP1) or die "$prog: couldn't close $conftmp_1: $!\n";;
		close(CONFTMP2) or die "$prog: couldn't close $conftmp_2: $!\n";;
	}
	else {
		open(CONFTMP2, ">$conftmp_2") or die "$prog: couldn't open $conftmp_2: $!\n";
		print CONFTMP2 "# /etc/lilo.conf

### LILO global section ###

#large-memory
lba32
boot = /dev/sda
map = /boot/map
install = menu
menu-scheme = Wb:Yr:Wb:Wb
prompt
timeout = 100
vga = normal
#default = Linux

### LILO per-image section ###

"; 
		close(CONFTMP2) or die "$prog: couldn't close $conftmp_2: $!\n";;
	}
	
	return $exit;
}

sub write_boot_option {
	
	my $oldline = '';
	my $newline = '';
	my $ok = 0;

	open(MYFH_NEW, "> $liloconfnew") or die "Cannot open file: $!";
	open(MYFH_TMP, "< $conftmp_2") or die "Cannot read file: $!";

	while (<MYFH_TMP>) {
		# line read from MYFH_TMP
		$oldline = $_;

		if (/^boot/ and $ok == 0) {
			if ($boot_id) {
				$oldline = "#boot = $boot_dev\n";
				$newline = "boot = $boot_id\n";
				print MYFH_NEW $oldline;
				if($opt_v) { print $oldline; }
			}
			else {
				$oldline = "boot = $boot_dev\n";
			}
			print MYFH_NEW $newline;
			if($opt_v) { print $newline; }
			if($opt_v) { print "\n"; }

			# convert only one time
			$ok = 1;
		}
		else {
			print MYFH_NEW $oldline;
		}
	}
	close(MYFH_TMP);
	close(MYFH_NEW);
}

sub write_image_config {

	my $image;
	my $initrd;
	my $nr;
	my $nr2;

	# search for kernel image files
	my @vmlinuz = readpipe("/bin/ls -t -1 /boot/vmlinuz-2* 2>/dev/null");

	# append to new lilo.conf
	open(MYFH_NEW, ">> $liloconfnew") or die "Cannot open file: $!";

	# create some line for each kernel image
	$nr = 0;
	foreach $image (@vmlinuz) {
		# search for kernel initrd file
		chomp $image;
		$initrd = $image;
		$initrd =~ s/vmlinuz/initrd\.img/;
		$nr2 = $nr + 1;

			print MYFH_NEW     'image = ' . $image . "\n";
			if($opt_v) { print 'image = ' . $image . "\n"; }
		if ($nr == 0) {
			print MYFH_NEW     "\t"  . 'label = "Linux"' . "\n";
			if($opt_v) { print "\t"  . 'label = "Linux"' . "\n"; }
		}
		elsif ($nr == 1) {
			print MYFH_NEW     "\t"  . 'label = "Linux Old"' . "\n";
			if($opt_v) { print "\t"  . 'label = "Linux Old"' . "\n"; }
		}
		if ($root_id) {
			print MYFH_NEW     "\t"  . '#root = ' . $root_dev . "\n";
			if($opt_v) { print "\t"  . '#root = ' . $root_dev . "\n"; }
			print MYFH_NEW     "\t"  . 'root = "' . $root_id . '"' . "\n";
			if($opt_v) { print "\t"  . 'root = "' . $root_id . '"' . "\n"; }
		}
		else {
			print MYFH_NEW     "\t"  . 'root = ' . $root_dev . "\n";
			if($opt_v) { print "\t"  . 'root = ' . $root_dev . "\n"; }
		}
			print MYFH_NEW     "\t"  . 'read-only' . "\n";
			if($opt_v) { print "\t"  . 'read-only' . "\n"; }
			print MYFH_NEW     "#\t" . 'restricted' . "\n";
			if($opt_v) { print "#\t" . 'restricted' . "\n"; }
			print MYFH_NEW     "#\t" . 'alias = ' . "$nr2" . "\n";
			if($opt_v) { print "#\t" . 'alias = ' . "$nr2" . "\n"; }
			print MYFH_NEW     "#\t" . 'optional' . "\n";
			if($opt_v) { print "#\t" . 'optional' . "\n"; }
		if (-f $initrd) {
			print MYFH_NEW     "\t"  . 'initrd = ' . $initrd . "\n";
			if($opt_v) { print "\t"  . 'initrd = ' . $initrd . "\n"; }
		}
			print MYFH_NEW     "\n";
			if($opt_v) { print "\n"; }

		$nr++;
		last if ($nr > 1);
	}

	close(MYFH_NEW);
}		
		
	
main();

__END__


=head1 NAME

liloconfig - create new lilo.conf file (with diskid and uuid)

=head1 SYNOPSIS

liloconfig [-h] [-v] [-f] [lilo.conf]

=head1 DESCRIPTION

liloconfig is an simple program for creating a new lilo.conf file.
After creating the new configuration file you must execute '/sbin/lilo'.

liloconfig use the lilo.example.conf file as template. In the final
lilo.conf file you find many useful comments for custom changes.

=head1 EXAMPLES

Lines in the configuration file /etc/lilo.conf:

  ### LILO global section ###

  #large-memory
  lba32
  boot = /dev/sda
  map = /boot/map
  install = menu
  menu-scheme = Wb:Yr:Wb:Wb
  prompt
  timeout = 100
  vga = normal
  #default = Linux

  ### LILO per-image section ###

  #boot = /dev/sda
  boot = /dev/disk/by-id/ata-SAMSUNG_SV1604N_S01FJ10X999999

  image = /boot/vmlinuz-2.6.32-5book-686
      label = "Linux"
      #root = /dev/sda1
      root = "UUID=18843936-00f9-4df0-a373-000d05a5dd44"
      read-only
  #   restricted
  #   alias = 1
  #   optional
      initrd = /boot/initrd.img-2.6.32-5book-686

  image = /boot/vmlinuz-2.6.32-5-686
      label = "Linux Old"
      #root = /dev/sda1
      root = "UUID=18843936-00f9-4df0-a373-000d05a5dd44"
      read-only
  #   restricted
  #   alias = 2
  #   optional
      initrd = /boot/initrd.img-2.6.32-5-686

=head1 OPTIONS

=over 4

=item B<-h>

Print a brief help.

=item B<-v>

Print verbose messages.

=item B<-f>

Force overriding existing lilo.conf.

=back

=head1 AUTHOR

B<liloconfig> was written by Joachim Wiedorn.

=cut