This file is indexed.

postinst is in linux-image-4.4.0-87-lowlatency 4.4.0-87.110~14.04.1.

This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.

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
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
#! /usr/bin/perl
# OriginalAuthor : Manoj Srivastava ( srivasta@pilgrim.umass.edu )
#
# Customized for Ubuntu by: Ben Collins <bcollins@ubuntu.com>

#use strict; #for debugging
use Cwd 'abs_path';

$|=1;

# Predefined values:
my $version           = "4.4.0-87-lowlatency";
my $link_in_boot      = "";  # Should be empty, mostly
my $no_symlink        = "";   # Should be empty, mostly
my $reverse_symlink   = "";   # Should be empty, mostly
my $do_symlink        = "Yes";  # target machine defined
my $do_boot_enable    = "Yes";  # target machine defined
my $do_bootfloppy     = "Yes";  # target machine defined
my $do_bootloader     = "Yes";  # target machine defined
my $move_image        = '';     # target machine defined
my $kimage            = "vmlinuz";   # Should be empty, mostly
my $loader            = "grub"; # lilo, silo, quik, palo, vmelilo, nettrom, arcboot or delo
my $image_dir         = "/boot";        # where the image is located
my $clobber_modules   = '';          # target machine defined
my $relative_links    = "";          # target machine defined
my $initrd            = "YES";        # initrd kernel
my $do_initrd         = '';     # Normally we do not
my $use_hard_links    = ''; # hardlinks do not work across fs boundaries
my $postinst_hook     = '';          #Normally we do not
my $postrm_hook       = '';          #Normally we do not
my $preinst_hook      = '';          #Normally we do not
my $prerm_hook        = '';          #Normally we do not
my $minimal_swap      = '';          # Do not swap symlinks
my $ignore_depmod_err = '';          # normally we do not
my $kernel_arch       = "x86_64";
my $ramdisk           = "/usr/sbin/update-initramfs";  # List of tools to create initial ram fs.
my $notifier          = "/usr/share/update-notifier/notify-reboot-required";
my $package_name      = "linux-image-$version";
my $explicit_do_loader = 'Yes';

my $Loader          = "NoLOADER"; #
$Loader             = "LILO"     if $loader =~ /^lilo/io;
$Loader             = "SILO"     if $loader =~ /^silo/io;
$Loader             = "QUIK"     if $loader =~ /^quik/io;
$Loader             = "yaboot"   if $loader =~ /^yaboot/io;
$Loader             = "PALO"     if $loader =~ /^palo/io;
$Loader             = "NETTROM"  if $loader =~ /^nettrom/io;
$Loader             = "VMELILO"  if $loader =~ /^vmelilo/io;
$Loader             = "ZIPL"     if $loader =~ /^zipl/io;
$Loader             = "ELILO"    if $loader =~ /^elilo/io;
$Loader             = "ARCBOOT"  if $loader =~ /^arcboot/io;
$Loader             = "DELO"     if $loader =~ /^delo/io;

# This should not point to /tmp, because of security risks.
my $temp_file_name = "/var/log/$loader" . "_log.$$";

#known variables
my $image_dest      = "/";
my $realimageloc    = "/$image_dir/";
my $have_conffile   = "";
my $silent_modules  = '';
my $silent_loader   = '';
my $warn_reboot     = 'Yes';     # Warn that we are installing a version of
                                 # the kernel we are running

my $modules_base    = '/lib/modules';
my $CONF_LOC        = '/etc/kernel-img.conf';

# Ignore all invocations except when called on to configure.
exit 0 unless $ARGV[0] =~ /configure/;

my $DEBUG = 0;

# Do some preliminary sanity checks here to ensure we actually have an
# valid image dir
chdir('/')           or die "could not chdir to /:$!\n";
die "Internal Error: ($image_dir) is not a directory!\n"
  unless -d $image_dir;

# remove multiple leading slashes; make sure there is at least one.
$realimageloc  =~ s|^/*|/|o;
$realimageloc  =~ s|/+|/|o;
die "Internal Error: ($realimageloc) is not a directory!\n"
  unless -d $realimageloc;

if (-r "$CONF_LOC" && -f "$CONF_LOC"  ) {
  if (open(CONF, "$CONF_LOC")) {
    while (<CONF>) {
      chomp;
      s/\#.*$//g;
      next if /^\s*$/;

      $do_symlink      = "" if /^\s*do_symlinks\s*=\s*(no|false|0)\s*$/ig;
      $no_symlink      = "" if /^\s*no_symlinks\s*=\s*(no|false|0)\s*$/ig;
      $reverse_symlink = "" if /^\s*reverse_symlink\s*=\s*(no|false|0)\s*$/ig;
      $link_in_boot    = "" if /^\s*image_in_boot\s*=\s*(no|false|0)\s*$/ig;
      $link_in_boot    = "" if /^\s*link_in_boot\s*=\s*(no|false|0)\s*$/ig;
      $move_image      = "" if /^\s*move_image\s*=\s*(no|false|0)\s*$/ig;
      $clobber_modules = '' if /^\s*clobber_modules\s*=\s*(no|false|0)\s*$/ig;
      $do_boot_enable  = '' if /^\s*do_boot_enable\s*=\s*(no|false|0)\s*$/ig;
      $do_bootfloppy   = '' if /^\s*do_bootfloppy\s*=\s*(no|false|0)\s*$/ig;
      $relative_links  = '' if /^\s*relative_links \s*=\s*(no|false|0)\s*$/ig;
      $do_bootloader   = '' if /^\s*do_bootloader\s*=\s*(no|false|0)\s*$/ig;
      $explicit_do_loader = '' if /^\s*do_bootloader\s*=\s*(no|false|0)\s*$/ig;
      $do_initrd       = '' if /^\s*do_initrd\s*=\s*(no|false|0)\s*$/ig;
      $use_hard_links  = '' if /^\s*use_hard_links\s*=\s*(no|false|0)\s*$/ig;
      $silent_modules  = '' if /^\s*silent_modules\s*=\s*(no|false|0)\s*$/ig;
      $silent_loader   = '' if /^\s*silent_loader\s*=\s*(no|false|0)\s*$/ig;
      $warn_reboot     = '' if /^\s*warn_reboot\s*=\s*(no|false|0)\s*$/ig;
      $minimal_swap    = '' if /^\s*minimal_swap\s*=\s*(no|false|0)\s*$/ig;
      $ignore_depmod_err = '' if /^\s*ignore_depmod_err\s*=\s*(no|false|0)\s*$/ig;

      $do_symlink      = "Yes" if /^\s*do_symlinks\s*=\s*(yes|true|1)\s*$/ig;
      $no_symlink      = "Yes" if /^\s*no_symlinks\s*=\s*(yes|true|1)\s*$/ig;
      $reverse_symlink = "Yes" if /^\s*reverse_symlinks\s*=\s*(yes|true|1)\s*$/ig;
      $link_in_boot    = "Yes" if /^\s*image_in_boot\s*=\s*(yes|true|1)\s*$/ig;
      $link_in_boot    = "Yes" if /^\s*link_in_boot\s*=\s*(yes|true|1)\s*$/ig;
      $move_image      = "Yes" if /^\s*move_image\s*=\s*(yes|true|1)\s*$/ig;
      $clobber_modules = "Yes" if /^\s*clobber_modules\s*=\s*(yes|true|1)\s*$/ig;
      $do_boot_enable  = "Yes" if /^\s*do_boot_enable\s*=\s*(yes|true|1)\s*$/ig;
      $do_bootfloppy   = "Yes" if /^\s*do_bootfloppy\s*=\s*(yes|true|1)\s*$/ig;
      $do_bootloader   = "Yes" if /^\s*do_bootloader\s*=\s*(yes|true|1)\s*$/ig;
      $explicit_do_loader = "YES" if /^\s*do_bootloader\s*=\s*(yes|true|1)\s*$/ig;
      $relative_links  = "Yes" if /^\s*relative_links\s*=\s*(yes|true|1)\s*$/ig;
      $do_initrd       = "Yes" if /^\s*do_initrd\s*=\s*(yes|true|1)\s*$/ig;
      $use_hard_links  = "Yes" if /^\s*use_hard_links\s*=\s*(yes|true|1)\s*$/ig;
      $silent_modules  = 'Yes' if /^\s*silent_modules\s*=\s*(yes|true|1)\s*$/ig;
      $silent_loader   = 'Yes' if /^\s*silent_loader\s*=\s*(yes|true|1)\s*$/ig;
      $warn_reboot     = 'Yes' if /^\s*warn_reboot\s*=\s*(yes|true|1)\s*$/ig;
      $minimal_swap    = 'Yes' if /^\s*minimal_swap\s*=\s*(yes|true|1)\s*$/ig;
      $ignore_depmod_err = 'Yes' if /^\s*ignore_depmod_err\s*=\s*(yes|true|1)\s*$/ig;

      $image_dest      = "$1"  if /^\s*image_dest\s*=\s*(\S+)/ig;
      $postinst_hook   = "$1"  if /^\s*postinst_hook\s*=\s*(\S+)/ig;
      $postrm_hook     = "$1"  if /^\s*postrm_hook\s*=\s*(\S+)/ig;
      $preinst_hook    = "$1"  if /^\s*preinst_hook\s*=\s*(\S+)/ig;
      $prerm_hook      = "$1"  if /^\s*prerm_hook\s*=\s*(\S+)/ig;
      $ramdisk         = "$1"  if /^\s*ramdisk\s*=\s*(.+)$/ig;
    }
    close CONF;
    $have_conffile = "Yes";
  }
}



# For some versions of kernel-package, we had this warning in the
# postinst, but the rules did not really interpolate the value in.
# Here is a sanity check.
my $pattern = "=" . "I";
$initrd=~ s/^$pattern$//;

if ($link_in_boot) {
  $image_dest = "/$image_dir/"; # same as realimageloc
}

# Tack on at least one trainling /
$image_dest = "$image_dest/";
$image_dest =~ s|^/*|/|o;
$image_dest =~ s|/+$|/|o;

if (! -d "$image_dest") {
  die "Expected Image Destination dir ($image_dest) to be a valid directory!\n";
}

# sanity
if (!($do_bootfloppy || $do_bootloader)) {
  $do_boot_enable = '';
}
if ($do_symlink && $no_symlink) {
  warn "Both do_symlinks and no_symlinks options enabled; disabling no_symlinks\n";
  $no_symlink = 0;
}

# most of our work is done in $image_dest (nominally /)
chdir("$image_dest") or die "could not chdir to $image_dest:$!\n";

# Paranoid check to make sure that the correct value is put in there
if    (! $kimage)                 { $kimage = "vmlinuz"; } # Hmm. empty
elsif ($kimage =~ m/^b?uImage$/o) { $kimage = "vmlinuz"; } # these produce vmlinuz
elsif ($kimage =~ m/^b?zImage$/o) { $kimage = "vmlinuz"; } # these produce vmlinuz
elsif ($kimage =~ m/^[iI]mage$/o) { my $nop = $kimage;   }
elsif ($kimage =~ m/^vmlinux$/o)  { my $nop = $kimage;   }
else                              { $kimage = "vmlinuz"; } # Default

$ENV{KERNEL_ARCH}=$kernel_arch if $kernel_arch;


die "Internal Error: Could not find image (" . $realimageloc
  . "$kimage-$version)\n" unless -e $realimageloc
  . "$kimage-$version";

# search for the boot loader in the path
my $loader_exec;
($loader_exec = $loader)  =~ s|.*/||;
my ($loaderloc) = grep -x, map "$_/$loader_exec",
  map { length($_) ? $_ : "." }  split /:/, $ENV{PATH};


######################################################################
######################################################################
###########        Test whether a relative symlinkwould be OK #######
######################################################################
######################################################################
sub test_relative {
  my %params = @_;
  my $cwd;

  die "Internal Error: Missing Required paramater 'Old Dir' "
    unless $params{'Old Dir'};
  die "Internal Error: Missing Required paramater New Dir' "
    unless $params{'New Dir'};


  die "Internal Error: No such dir $params{'Old Dir'} "
    unless -d $params{'Old Dir'};
  die "Internal Error: No such dir $params{'New Dir'} "
    unless -d $params{'New Dir'};

  # If the caller specified a test file, and it does not exist try and find
  # another file to use in its stead.  As we are installing kernels we can
  # use any versioned file from this kernel which should be in the same place.
  if (defined $params{'Test File'} and
      ! -f $params{'Old Dir'} . '/' . $params{'Test File'}) {

      my @possible = glob($params{'Old Dir'} . "/*$version*");
      if ($#possible >= 0) {
        $params{'Test File'} = `basename "$possible[0]"`;
        chomp($params{'Test File'});
        warn "Test relative: selected $params{'Test File'}"
          if $DEBUG;
      }
  }

  warn "Test relative: testing $params{'Old Dir'} -> $params{'New Dir'}"
    if $DEBUG;
  chomp($cwd = `pwd`);
  chdir ($params{'New Dir'}) or die "Could not chdir to $params{'New Dir'}:$!";
  my $ok = 0;
  $params{'Old Dir'}  =~ s|^/*||o;
  if (-d $params{'Old Dir'} ) {
    if (defined $params{'Test File'}) {
      if (-e $params{'Old Dir'} . $params{'Test File'}) {
        $ok  = 1;
      }
    } else {
      $ok = 1;                  # well, backward compatibility
    }
  }
  chdir ($cwd) or die "Could not chdir to $params{'New Dir'}:$!";
  return $ok;
}

######################################################################
######################################################################
############
######################################################################
######################################################################
# sub CanonicalizePath {
#   my $path = join '/', @_;
#   my @work = split '/', $path;
#   my @out;
#   my $is_absolute;

#   if (@work && $work[0] eq "") {
#     $is_absolute = 1; shift @work;
#   }

#   while (@work) {
#     my $seg = shift @work;
#     if ($seg eq "." || $seg eq "") {
#     } 
#     elsif ($seg eq "..") {
#       if (@out && $out[-1] ne "..") {
#         pop @out;
#       } 
#       else {
#         # Leading "..", or "../..", etc.
#         push @out, $seg;
#       }
#     } 
#     else {
#       push @out, $seg;
#     }
#   }

#   unshift @out, "" if $is_absolute;
#   return join('/', @out);
# }
######################################################################
######################################################################
############
######################################################################
######################################################################

sub spath {
  my %params = @_;

  die "Missing Required paramater 'Old'" unless $params{'Old'};
  die "Missing Required paramater 'New'" unless  $params{'New'};

  my @olddir  = split '/', `readlink -q -m $params{'Old'}`;
  my @newdir  = split '/', `readlink -q -m $params{'New'}`;
  my @outdir  = @olddir;

  my $out = '';
  my $i;
  for ($i = 0; $i <= $#olddir && $i <= $#newdir; $i++) {
    $out++ if ($olddir[$i] ne $newdir[$i]);
    shift @outdir unless $out;
    unshift @outdir, ".." if $out;
  }
  if ($#newdir > $#olddir) {
    for ($i=0; $i < $#newdir; $i++) {
      unshift @outdir, "..";
    }
  }
  return join ('/', @outdir);
}
######################################################################
######################################################################
############
######################################################################
######################################################################


# This routine actually moves the kernel image
# From: $realimageloc/$kimage-$version (/boot/vmlinuz-2.6.12)
# To:   $image_dest/$kimage-$version   (/vmlinuz-2.6.12)
# Note that the image is moved to a versioned destination, but ordinary
# symlinks we create otherwise are not normally versioned
sub really_move_image {
  my $src_dir  = $_[0];
  my $target   = $_[1];
  my $dest_dir = $_[2];

  warn "Really move image: src_dir=$src_dir, target=$target,\n destdir=$dest_dir"
    if $DEBUG;
  if (-e "$target") {
    # we should be in dir $dest_dir == $image_dest /, normally
    rename("$target", "$target.$$") ||
      die "failed to move " . $dest_dir . "$target:$!";
    warn "mv $target $target.$$" if $DEBUG;
  }
  warn "mv -f $src_dir$target $target" if $DEBUG;
  my $ret = system("mv -f " . $src_dir . "$target " .
                   " $target");
  if ($ret) {
    die("Failed to move " . $src_dir . "$target to "
        . $dest_dir . "$target");
  }
  # Ok, now we may clobber the previous .old files
  if (-e "$target.$$") {
    rename("$target.$$", "$target.old") ||
      die "failed to move " . $dest_dir . "$target:$!";
    warn "mv $target.$$ $target " if $DEBUG;
  }
}

# Normally called after really_move_image; and only called if we asked for 
# reversed link this routine reverses the symbolic link that is notmally 
# created. Since the real kernel image has been moved over to 
# $image_dest/$kimage-$version. So, this routine links
# From:   $image_dest/$kimage-$version   (/vmlinuz-2.6.12)
# To:     $realimageloc/$kimage-$version (/boot/vmlinuz-2.6.12)
sub really_reverse_link {
  my $src_dir    = $_[0];
  my $link_name  = $_[1];
  my $dest_dir   = $_[2];
  warn "Really reverse link: src_dir=$src_dir, link name=$link_name\n" .
    "\tdestdir=$dest_dir" if $DEBUG;

  my $Old = $dest_dir;
  if (test_relative ('Old Dir' => $Old, 'New Dir' => $src_dir,
                     'Test File' => "$link_name")) {
    $Old   =~ s|^/*||o;
  }
  # Special case is they are in the same dir
  my $rel_path = spath('Old' => "$Old", 'New' => "$src_dir" );
  $Old ="" if $rel_path =~ m/^\s*$/o;

  if ($use_hard_links =~ m/YES/i) {
    link($Old . "$link_name", $src_dir . "$link_name") ||
      die("Failed to link " . $dest_dir . "$link_name to " . $src_dir . 
          "$link_name:$!");
    warn "ln " . $Old . "$link_name " . $src_dir . "$link_name"  if $DEBUG;
  }
  else {
    symlink($Old . "$link_name", $src_dir . "$link_name") ||
      die("Failed to symbolic-link " . $dest_dir . "$link_name to " . $src_dir
          . "$link_name:$!");
    warn "ln -s " . $Old . "$link_name " . $src_dir . "$link_name" if $DEBUG;
  }
}

# This routine is invoked if there is a symbolic link in place
# in $image_dest/$kimage -- so a symlink exists in the destination.
# What we are trying to determine is if we need to move the symbolic link over
# to the the .old location
sub move_p {
  my $kimage     = $_[0];       # Name of the symbolic link
  my $image_dest = $_[1];       # The directory the links goes into
  my $image_name = $_[2]; 
  my $src_dir    = $_[3]; 
  my $force_move = 0;
  warn "Move?: kimage=$kimage, image_dest=$image_dest, \n" .
    "\timage_name=$image_name, src_dir=$src_dir" if $DEBUG;

  if ($no_symlink || $reverse_symlink) {
    # we do not want links, yet we have a symbolic link here!
    warn "found a symbolic link in " . $image_dest . "$kimage \n" .
      "even though no_symlink is defined\n" if $no_symlink;
    warn "found a symbolic link in " . $image_dest . "$kimage \n" .
      "even though reverse_symlink is defined\n" if $reverse_symlink;
    # make sure we change this state of affairs
    $force_move = 1;
    return $force_move;
  }

  warn "DEBUG: OK. We found symlink, and we should have a symlink here.\n"
    if $DEBUG;
  my $vmlinuz_target = readlink "$kimage";
  my $real_target = '';
  my $target = `readlink -q -m "${realimageloc}${kimage}-${version}"`;
  $real_target = abs_path($vmlinuz_target) if defined($vmlinuz_target);

  if (!defined($vmlinuz_target) || ! -f "$real_target") {
    # what, a dangling symlink?
    warn "The link "  . $image_dest . "$kimage is a dangling link" .
      "to $real_target\n";
    $force_move = 1;
    return $force_move;
  }


  warn "DEBUG: The link $kimage points to ($vmlinuz_target)\n" if $DEBUG;
  warn "DEBUG: ($vmlinuz_target) is really ($real_target)\n" if $DEBUG;
  my $cwd;
  chomp ($cwd=`pwd`);
  if ($vmlinuz_target !~ m|^/|o) {
    $vmlinuz_target = $cwd . "/" . $vmlinuz_target;
    $vmlinuz_target =~ s|/+|/|o;
  }
  $vmlinuz_target = `readlink -q -m $vmlinuz_target`;

  if ("$vmlinuz_target" ne "$target") {
    warn "DEBUG: We need to handle this.\n" if $DEBUG;
    if ($minimal_swap) {
      warn "DEBUG: Minimal swap.\n" if $DEBUG;
      if (-l "$kimage.old") {
        warn "DEBUG: There is an old link at $kimage.old\n" if $DEBUG;
        my $old_target = readlink "$kimage.old";
        my $real_old_target = '';
        $real_old_target=abs_path($old_target) if defined ($old_target);

        if ($real_old_target  && -f "$real_old_target") {
          if ($old_target !~ m|^/|o) {
            $old_target = $cwd . "/" . $old_target;
            $old_target =~ s|/+|/|o;
          }
          $old_target = `readlink -q -m $old_target`;
          if ("$old_target"  ne "$target") {
            $force_move = 1;
            warn "DEBUG: Old link ($old_target) does not point to us ($target)\n"
              if $DEBUG;
          } 
          else {            # The .old points to the current
            warn "$kimage.old --> $target -- doing nothing";
            $force_move = 0;
          }
        } 
        else { 
          warn "DEBUG: Well, the old link does not exist -- so we move\n"
            if $DEBUG;
          $force_move = 1;
        }
      } 
      else {
        warn "DEBUG: No .old link -- OK to move\n"
          if $DEBUG;
        $force_move = 1;
      }
    } 
    else {
      warn "DEBUG: ok, minimal swap is no-- so we move.\n"
        if $DEBUG;
      $force_move = 1;
    }
  }
  else {                  # already have proper link
    warn "$kimage($vmlinuz_target) points to $target ($real_target) -- doing nothing";
    $force_move = 0;
  }
  return $force_move;
}


# This routine moves the symbolic link around (/vmlinuz -> /vmlinuz.old)
# It pays attention to whether we should the fact whether we should be using
# hard links or not.
sub really_move_link {
  my $kimage     = $_[0];       # Name of the symbolic link
  my $image_dest = $_[1];       # The directory the links goes into
  my $image_name = $_[2]; 
  my $src_dir    = $_[3]; 
  warn "really_move_link: kimage=$kimage, image_dest=$image_dest\n" .
    "\t image_name=$image_name, src_dir=$src_dir" if $DEBUG;

  # don't clobber $kimage.old quite yet
  rename("$kimage", "$kimage.$$") ||
    die "failed to move " . $image_dest . "$kimage:$!";
  warn "mv $kimage $kimage.$$" if $DEBUG;
  my $Old = $src_dir;
  my $cwd;

  chomp($cwd=`pwd`);
  if (test_relative ('Old Dir' => $Old, 'New Dir' => $cwd,
                     'Test File' => "$image_name")) {
    $Old   =~ s|^/*||o;
  }
  # Special case is they are in the same dir
  my $rel_path = spath('Old' => "$Old", 'New' => "$cwd" );
  $Old ="" if $rel_path =~ m/^\s*$/o;

  if ($use_hard_links =~ m/YES/i) {
    warn "ln ${Old}${image_name} $kimage" if $DEBUG;
    if (! link("${Old}${image_name}", "$kimage")) {
      rename("$kimage.$$", "$kimage");
      die("Failed to link ${Old}${image_name} to " .
          "${image_dest}${kimage}:$!");
    }
  } 
  else {
    warn "ln -s ${Old}${image_name} $kimage" if $DEBUG;
    if (! symlink("${Old}${image_name}", "$kimage")) {
      rename("$kimage.$$", "$kimage");
      die("Failed to symbolic-link ${Old}${image_name} to " .
          "${image_dest}${kimage}:$!");
    }
  }

  # Ok, now we may clobber the previous .old file
  if (-l "$kimage.old" || ! -e "$kimage.old" ) {
    rename("$kimage.$$", "$kimage.old");
    warn "mv $kimage.$$ $kimage.old" if $DEBUG;
  }
  else {
    warn "$kimage.old is not a symlink, not clobbering\n";
    warn "rm $kimage.$$";
    unlink "$kimage.$$" if $DEBUG;
  }
}

# This routine handles a request to do symlinks, but there is no
# symlink file already there.  Either we are supposed to use copy, or we are
# installing on a pristine system, or the user does not want symbolic links at
# all.  We use a configuration file to tell the last two cases apart, creating
# a config file if needed.
sub handle_missing_link {
  my $kimage     = $_[0];       # Name of the symbolic link
  my $image_dest = $_[1];       # The directory the links goes into
  my $image_name = $_[2]; 
  my $src_dir    = $_[3]; 
  warn "handle_missing_link: kimage=$kimage, image_dest=$image_dest\n" .
    "\t image_name=$image_name, src_dir=$src_dir" if $DEBUG;

  if ($no_symlink) {
    warn "cp -a --backup=t $realimageloc$image_name $kimage" if $DEBUG;
    my $ret = system("cp -a --backup=t " . $realimageloc .
                     "$image_name "   . " $kimage");
    if ($ret) {
      die("Failed to copy " . $realimageloc . "$image_name to "
          . $image_dest . "$kimage");
    }
  } 
  elsif ($reverse_symlink) {
    warn "mv -f $realimageloc$image_name $kimage" if $DEBUG;
    my $ret = system("mv -f " . $realimageloc . "$image_name "
                     . "$kimage");
    if ($ret) {
      die("Failed to move " . $realimageloc . "$image_name to "
          . $image_dest . "$kimage");
    }
  } 
  else {
    if (! $have_conffile) {
      my $ret;
      my $answer='';
      $do_symlink = "Yes";

      if (open(CONF, ">$CONF_LOC")) {
        print CONF "# Kernel Image management overrides\n";
        print CONF "# See kernel-img.conf(5) for details\n";
        if ($loader =~ /palo/i) {
          print CONF "link_in_boot = Yes\n";
          print CONF "do_symlinks = Yes\n";
          print CONF "relative_links = Yes\n";
          print CONF "do_bootloader = No\n";
        } else {
          print CONF "do_symlinks = $do_symlink\n";
        }
        close CONF;
      }
      $have_conffile = "Yes";
    }
  }

  if (! $no_symlink && $do_symlink =~ /Yes/i) {
    my $Old = $realimageloc;
    my $New = $image_dest;
    my $Name = "$image_name";
    my $Link_Dest = "$kimage";

    if ($reverse_symlink) {
      $Old = $image_dest;
      $New = $realimageloc;
      $Name = "$kimage";
      $Link_Dest = $realimageloc . "$image_name";
    }
    if (test_relative ('Old Dir' => $Old,
                       'New Dir' => $New,
                       'Test File' => $Name)) {
      $Old   =~ s|^/*||o;
    }
    # Special case is they are in the same dir
    my $rel_path = spath('Old' => "$Old", 'New' => "$New" );
    $Old ="" if $rel_path =~ m/^\s*$/o;

    symlink($Old . "$Name", "$Link_Dest") ||
      die("Failed to symbolic-link ${Old}$Name to $Link_Dest:$!");
    warn "ln -s ${Old}$Name $Link_Dest" if $DEBUG;

  }
}

# This routine handles the rest of the cases, where the user has requested 
# non-traditional handling, like using cp, or reverse symlinks, or hard links.
sub handle_non_symlinks {
  my $kimage     = $_[0];       # Name of the symbolic link
  my $image_dest = $_[1];       # The directory the links goes into
  my $image_name = $_[2]; 
  my $src_dir    = $_[3]; 
  warn "handle_non_link: kimage=$kimage, image_dest=$image_dest\n" .
    "\t image_name=$image_name, src_dir=$src_dir" if $DEBUG;

  # Save the current image. We do this in all four cases
  rename("$kimage", "$kimage.$$") || 
    die "failed to move " . $image_dest . "$kimage:$!";
  warn "mv $kimage $kimage.$$" if $DEBUG;

  ##,#### 
  # case One
  #`####
  if ($no_symlink) {
    # Maybe /$image_dest is on a dos system?
    warn "cp -a --backup=t $realimageloc$image_name $kimage" if $DEBUG;
    my $ret = system("cp -a --backup=t " . $realimageloc
                     . "$image_name " . "$kimage");
    if ($ret) {
      if (-e "$kimage.$$") {
        rename("$kimage.$$", "$kimage");
        warn "mv $kimage.$$ $kimage" if $DEBUG;
      }
      die("Failed to copy " . $realimageloc . "$image_name to "
          . $image_dest . "$kimage");
    }
  }
  ##,#### 
  # case Two
  #`####
  elsif ($reverse_symlink) {  # Maybe /$image_dest is on a dos system?
    warn "mv -f  $realimageloc$image_name $kimage" if $DEBUG;
    my $ret = system("mv -f " . $realimageloc . "$image_name "
                     . $image_dest . "$kimage");
    if ($ret) {
      if (-e "$kimage.$$") {
        rename("$kimage.$$", "$kimage");
        warn "mv $kimage.$$ $kimage" if $DEBUG;
      }
      die("Failed to move " . $realimageloc . "$image_name to "
          . $image_dest . "$kimage");
    }
    my $Old = $image_dest;
    if (test_relative ('Old Dir' => $Old, 'New Dir' => $realimageloc,
                       'Test File' => "$kimage")) {
      $Old   =~ s|^/*||o;
    }
    # Special case is they are in the same dir
    my $rel_path = spath('Old' => "$Old", 'New' => "$realimageloc" );
    $Old ="" if $rel_path =~ m/^\s*$/o;

    if ($use_hard_links =~ m/YES/i) {
      warn "ln " . $Old . "$kimage " . $realimageloc . "$image_name" if $DEBUG;
      if (! link($Old . "$kimage", $realimageloc . "$image_name")) {
        warn "Could not link " . $image_dest .
          "$kimage to $image_name :$!";
      }
    }
    else {
      warn "ln -s " . $Old . "$kimage " . $realimageloc . "$image_name" if $DEBUG;
      if (! symlink($Old . "$kimage", $realimageloc . "$image_name")) {
        warn "Could not symlink " . $image_dest .
          "$kimage to $image_name :$!";
      }
    }
  }
  ##,####
  # case Three
  #`####
  elsif ($use_hard_links =~ m/YES/i ) {
    # Ok then. this ought to be a hard link, and hence fair game
    # don't clobber $kimage.old quite yet
    my $Old = $realimageloc;
    my $cwd;
    chomp($cwd=`pwd`);
    if (test_relative ('Old Dir' => $Old, 'New Dir' => $cwd,
                       'Test File' => "$image_name")) {
      $Old   =~ s|^/*||o;
    }
    # Special case is they are in the same dir
    my $rel_path = spath('Old' => "$Old", 'New' => "$cwd" );
    $Old ="" if $rel_path =~ m/^\s*$/o;

    warn "ln " . $Old . "$image_name " . "$kimage" if $DEBUG;
    if (! link($Old . "$image_name", "$kimage")) {
      warn "mv $kimage.$$ $kimage" if $DEBUG;
      rename("$kimage.$$", "$kimage");
      die("Failed to link " . $realimageloc . "$image_name to "
          . $image_dest . "$kimage");
    }
  }
  ##,####
  # case Five!?!
  #`####
  elsif ($do_symlink) {
    # Ok then. this ought to be a symlink, and hence fair game
    # don't clobber $kimage.old quite yet
    my $Old = $realimageloc;
    my $cwd;
    chomp($cwd=`pwd`);
    if (test_relative ('Old Dir' => $Old, 'New Dir' => $cwd,
                       'Test File' => "$image_name")) {
      $Old   =~ s|^/*||o;
    }
    # Special case is they are in the same dir
    my $rel_path = spath('Old' => "$Old", 'New' => "$cwd" );
    $Old ="" if $rel_path =~ m/^\s*$/o;

    warn "symlink " . $Old . "$image_name " . "$kimage" if $DEBUG;
    if (! symlink($Old . "$image_name", "$kimage")) {
      warn "mv $kimage.$$ $kimage" if $DEBUG;
      rename("$kimage.$$", "$kimage");
      die("Failed to link " . $realimageloc . "$image_name to "
          . $image_dest . "$kimage");
    }
  }
  ##,####
  # case Four
  #`####
  else {
    # We just use cp
    warn "cp -a --backup=t $realimageloc$image_name $kimage" if $DEBUG;
    my $ret = system("cp -a --backup=t " . $realimageloc
                     . "$image_name " . "$kimage");
    if ($ret) {
      if (-e "$kimage.$$") {
        warn "mv $kimage.$$ $kimage" if $DEBUG;
        rename("$kimage.$$", "$kimage");
      }
      die("Failed to copy " . $realimageloc . "$image_name to "
          . $image_dest . "$kimage");
    }
  }
  # Ok, now we may clobber the previous .old file
  warn "mv $kimage.$$ $kimage.old if -e $kimage.$$" if $DEBUG;
  rename("$kimage.$$", "$kimage.old") if -e "$kimage.$$";
}

# This routine is responsible for setting up the symbolic links
# So, the actual kernel image lives in
# $realimageloc/$image_name (/boot/vmlinuz-2.6.12).
# This routine creates symbolic links in $image_dest/$kimage (/vmlinuz)
sub image_magic {
  my $kimage     = $_[0];       # Name of the symbolic link
  my $image_dest = $_[1];       # The directory the links goes into
  my $image_name = "$kimage-$version";
  my $src_dir    = $realimageloc;
  warn "image_magic: kimage=$kimage, image_dest=$image_dest\n" .
    "\t image_name=$image_name, src_dir=$src_dir" if $DEBUG;

  # Well, in any case, if the destination (the symlink we are trying
  # to create) is a directory, we should do nothing, except throw a
  # diagnostic.
  if (-d "$kimage" ) {
    die ("Hmm. $kimage is a directory, which I did not expect.  I am\n" .
         "trying to create a symbolic link with that name linked to \n" .
         "$image_dest . Since a directory exists here, my assumptions \n" .
         "are way off, and I am aborting.\n" );
    exit (3);
  }

  if ($move_image) {   # Maybe $image_dest is in on dos, or something?
    #                   source dir,    link name,        dest dir
    really_move_image(  $realimageloc, $image_name, $image_dest);
    really_reverse_link($realimageloc, $image_name, $image_dest)
      if $reverse_symlink;
    return;
  }

  if (-l "$kimage") {           # There is a symbolic link
    warn "DEBUG: There is a symlink for $kimage\n" if $DEBUG;
    my $force_move = move_p($kimage, $image_dest, $image_name, $src_dir);

    if ($force_move) {
      really_move_link($kimage, $image_dest, $image_name, $src_dir);
    }
  }
  elsif (! -e "$kimage") {
    # Hmm. Pristine system? How can that be? Installing from scratch?
    # Or maybe the user does not want a symbolic link here.
    # Possibly they do not want a link here. (we should be in /
    # here[$image_dest, really]
    handle_missing_link($kimage, $image_dest, $image_name, $src_dir);
  }
  elsif (-e "$kimage" ) {
    # OK, $kimage exists -- but is not a link
    handle_non_symlinks($kimage, $image_dest, $image_name, $src_dir);
  }
}

######################################################################
######################################################################
######################################################################
######################################################################

# We may not have any modules installed
if ( -d "$modules_base/$version" ) {
  print STDERR "Running depmod.\n";
  my $ret = system("depmod -a $version");
  if ($ret) {
    print STDERR "Failed to run depmod\n";
    exit(1);
  }
}



sub find_initrd_tool {
  my $hostversion = shift;
  my $version = shift;
  print STDERR "Finding valid ramdisk creators.\n";
  my @ramdisks =
    grep {
      my $args = 
        "$_ " .
          "--supported-host-version=$hostversion " .
            "--supported-target-version=$version " .
              "1>/dev/null 2>&1"
                ;
      system($args) == 0;
    }
      split (/[:,\s]+/, $ramdisk);
}

# The initrd symlink should probably be in the same dir that the
# symlinks are in
if ($initrd) {
  my $success = 0;

  # Update-initramfs is called slightly different than mkinitrd and
  # mkinitramfs. XXX It should really be made compatible with this stuff
  # some how.
  my $upgrading = 1;
  if (! defined $ARGV[1] || ! $ARGV[1] || $ARGV[1] =~ m/<unknown>/og) {
    $upgrading = 0;
  }
  my $ret = system("$ramdisk " . ($upgrading ? "-u" : "-c") . " -k " . $version . " >&2");
  $success = 1 unless $ret;
  die "Failed to create initrd image.\n" unless $success;
  if (! defined $ARGV[1] || ! $ARGV[1] || $ARGV[1] =~ m/<unknown>/og) {
    image_magic("initrd.img", $image_dest);
  }
  else {
    lstat("initrd.img");
    if (! -e _) {
      handle_missing_link("initrd.img", $image_dest, "initrd.img-$version",
                          $realimageloc);
    }
    else {
      print STDERR
        "Not updating initrd symbolic links since we are being updated/reinstalled \n";
      print STDERR
        "($ARGV[1] was configured last, according to dpkg)\n";
    }
  }

  if ($initrd && -l "initrd" ) {
    unlink "initrd";
  }

  if ($initrd && -l "$image_dir/initrd" && ! $link_in_boot) {
    unlink "$image_dir/initrd";
  }
}
else {                        # Not making an initrd emage
  if (-l "initrd.img") {
    # Ooh, last image was an initrd image? in any case, we should move it. 
    my $target = readlink "initrd.img";
    my $real_target = '';
    $real_target = abs_path($target) if defined ($target);

    if (!defined($target) || ! -f "$real_target") {
      # Eh. dangling link. can safely be removed.
      unlink("initrd.img");
    } else {
      if (-l "initrd.img.old" || ! -e "initrd.img.old" ) {
        rename("initrd.img", "initrd.img.old");
      } else {
        warn "initrd.img.old is not a symlink, not clobbering\n";
        unlink("initrd.img");
      }
    }
  }
}

# Warn of a reboot
if (-x $notifier) {
  system($notifier);
}

# Let programs know not to hibernate if the kernel that would be used for
# resume-from-hibernate is likely to differ from the currently running kernel.
system("mountpoint -q /var/run");
if ($? eq 0) {
	system("touch /var/run/do-not-hibernate");
}

# Only change the symlinks if we are not being upgraded
if (! defined $ARGV[1] || ! $ARGV[1] || $ARGV[1] =~ m/<unknown>/og) {
  image_magic($kimage, $image_dest);
}
else {
  lstat("$kimage");
  if (! -e _) {
    handle_missing_link($kimage, $image_dest, "$kimage-$version", 
                        $realimageloc);
  }
  else {
    print STDERR
      "Not updating image symbolic links since we are being updated/reinstalled \n";
    print STDERR
      "($ARGV[1] was configured last, according to dpkg)\n";
  }
}

# We used to have System.* files in /
if (-e "/System.map" || -e "/System.old") {
  unlink '/System.map' if -e '/System.map';
  unlink '/System.old' if -e '/System.old';
}

# creating some info about kernel and initrd
if ($DEBUG) {
  my $ksize=sprintf("%.0f",(stat($realimageloc .
                                 "$kimage-$version"))[7]/1024)."kB";
  my $initrdsize='';
  if ($initrd) {
    $initrdsize=sprintf("%.0f",(stat($realimageloc .
                                     "initrd.img-$version"))[7]/1024)."kB";
  }

  print STDERR <<"EOMSG";
A new kernel image has been installed at $realimageloc$kimage-$version
 (Size: $ksize)

Symbolic links, unless otherwise specified, can be found in $image_dest

EOMSG
  ;

  if ($initrd) {
    print STDERR <<"EOMSGA";

 Initial rootdisk image: ${realimageloc}initrd.img-$version (Size: $initrdsize)
EOMSGA
    ;
  }
}

# set the env var stem
$ENV{'STEM'} = "linux";
sub exec_script {
  my $type   = shift;
  my $script = shift;
  print STDERR "Running $type hook script $script.\n";
  system ("$script $version $realimageloc$kimage-$version") &&
    print STDERR "User $type hook script [$script] ";
  if ($?) {
    if ($? == -1) {
      print STDERR "failed to execute: $!\n";
    }
    elsif ($? & 127) {
      printf STDERR "died with signal %d, %s coredump\n",
        ($? & 127),  ($? & 128) ? 'with' : 'without';
    }
    else {
      printf STDERR "exited with value %d\n", $? >> 8;
    }
    exit $? >> 8;
  }
}
sub run_hook {
  my $type   = shift;
  my $script = shift;
  if ($script =~ m,^/,) {
    # Full path provided for the hook script
    if (-x "$script") {
      &exec_script($type,$script);
    }
    else {
      die "The provided $type hook script [$script] could not be run.\n";
    }
  }
  else {
    # Look for it in a safe path
    for my $path ('/bin', '/sbin', '/usr/bin', '/usr/sbin') {
      if (-x "$path/$script") {
        &exec_script($type, "$path/$script");
        return 0;
      }
    }
    # No luck
    print STDERR "Could not find $type hook script [$script].\n";
    die "Looked in: '/bin', '/sbin', '/usr/bin', '/usr/sbin'\n";
  }
}

my $options;
for (@ARGV) {
	s,','\\'',g;
	$options .= " '$_'";
}
$ENV{'DEB_MAINT_PARAMS'}="$options";

## Run user hook script here, if any
if ($postinst_hook) {
  &run_hook("postinst", $postinst_hook);
}

if (-d "/etc/kernel/postinst.d") {
  print STDERR "Examining /etc/kernel/postinst.d.\n";
  system ("run-parts --verbose --exit-on-error --arg=$version " .
          "--arg=$realimageloc$kimage-$version " .
          "/etc/kernel/postinst.d") &&
            die "Failed to process /etc/kernel/postinst.d";
}

if (-d "/etc/kernel/postinst.d/$version") {
  print STDERR "Examining /etc/kernel/postinst.d/$version.\n";
  system ("run-parts --verbose --exit-on-error --arg=$version " .
          "--arg=$realimageloc$kimage-$version " .
          "/etc/kernel/postinst.d/$version") &&
            die "Failed to process /etc/kernel/postinst.d/$version";
}

LOADER: {
  last unless $do_boot_enable; # Exit if explicitly asked to

  last if $loader =~ /silo/i; # SILO does not have to be executed.
  last if $loader =~ /yaboot/i; # yaboot does not have to be executed.
  last if $loader =~ /milo/i; # MILO does not have to be executed.
  last if $loader =~ /nettrom/i; # NETTROM does not have to be executed.
  last if $loader =~ /arcboot/i; # ARCBOOT does not have to be executed.
  last if $loader =~ /delo/i; # DELO does not have to be executed.
  last if $loader =~ /quik/i; # maintainer asked quik invocation to be ignored

  last unless $loaderloc;
  last unless -x $loaderloc;
  last unless $do_bootloader;

  if (-T "/etc/$loader.conf") {
    # Trust and use the existing lilo.conf.
    print STDERR "You already have a $Loader configuration in /etc/$loader.conf\n";
    my $ret = &run_lilo();
    exit $ret if $ret;
  }
}


sub run_lilo (){
  my $ret;
  # Try and figure out if the user really wants lilo to be run --
  # since the default is to run the boot laoder, which is ! grub -- but
  # the user may be using grub now, and not changed the default.

  # So, if the user has explicitly asked for the loader to be run, or
  # if there is no postinst hook, or if there is no grub installed --
  # we are OK. Or else, we ask.
  if ($explicit_do_loader || (! ($postinst_hook && -x '/usr/sbin/grub')))  {
    print STDERR "Running boot loader as requested\n";
  } else {
    print STDERR "Ok, not running $loader\n";
  }
  if ($loader =~ /^lilo/io or $loader =~ /vmelilo/io) {
    print STDERR "Testing $loader.conf ... \n";
    unlink $temp_file_name;     # security
    $ret = system("$loaderloc -t >$temp_file_name 2>&1");
    if ($ret) {
      print STDERR "Boot loader test failed\n";
      return $ret;
    }
    unlink "$temp_file_name";
    print STDERR "Testing successful.\n";
    print STDERR "Installing the ";
    print STDERR "partition " if $loader =~ /^lilo/io;
    print STDERR "boot sector... \n";
  }

  print STDERR "Running $loaderloc  ... \n";
  if ($loader =~ /^elilo/io) {
    $ret = system("$loaderloc 2>&1 | tee $temp_file_name");
  } else {
    $ret = system("$loaderloc >$temp_file_name 2>&1");
  }
  if ($ret) {
    print STDERR "Boot loader failed to run\n";
    return $ret;
  }
  unlink $temp_file_name;
  print STDERR "Installation successful.\n";
  return 0;
}

exit 0;

__END__