postinst is in linux-image-3.13.0-151-lowlatency 3.13.0-151.201.
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 | #! /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 = "3.13.0-151-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";
}
}
$initrd = '' if (! -x "$ramdisk");
# 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 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 {
if (! -e "initrd.img") {
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, $image_dest);
}
else {
if (! -e "$kimage") {
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__
|