diff options
Diffstat (limited to 'debian/control-scripts/postrm')
| -rw-r--r-- | debian/control-scripts/postrm | 355 |
1 files changed, 355 insertions, 0 deletions
diff --git a/debian/control-scripts/postrm b/debian/control-scripts/postrm new file mode 100644 index 00000000000..d1119f06227 --- /dev/null +++ b/debian/control-scripts/postrm @@ -0,0 +1,355 @@ +#! /usr/bin/perl +# -*- Mode: Cperl -*- +# image.postrm --- +# Author : Manoj Srivastava ( srivasta@glaurung.green-gryphon.com ) +# Created On : Sat May 15 11:05:13 1999 +# Created On Node : glaurung.green-gryphon.com +# Last Modified By : Manoj Srivastava +# Last Modified On : Wed Sep 13 11:26:19 2006 +# Last Machine Used: glaurung.internal.golden-gryphon.com +# Update Count : 57 +# Status : Unknown, Use with caution! +# HISTORY : +# Description : +# +# $Id: image.postrm,v 1.31 2003/10/07 16:24:20 srivasta Exp $ +# + + +# +#use strict; #for debugging +use Cwd 'abs_path'; + +$|=1; + +# Predefined values: +my $version = "=V"; +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 = "=K"; # Should be empty, mostly +my $loader = "=L"; # lilo, silo, quik, palo, vmelilo, or nettrom +my $image_dir = "/boot"; # where the image is located +my $clobber_modules = ''; # target machine defined +my $initrd = "YES"; # initrd kernel +my $do_initrd = ''; # Normally, we don't +my $warn_initrd = 'YES'; # Normally we do +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 $relink_build_link = 'YES'; # There is no harm in checking the link +my $force_build_link = ''; # we shall not create a dangling link +my $kernel_arch = "=B"; +my $ramdisk = "/usr/sbin/update-initramfs"; +my $package_name = "linux-image-$version"; + +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; + + +# This should not point to /tmp, because of security risks. +my $temp_file_name = "/var/log/$loader" . "_log.$$"; + +#known variables +my @boilerplate = (); +my @silotemplate = (); +my @quiktemplate = (); +my @palotemplate = (); +my @vmelilotemplate = (); +my $bootdevice = ''; +my $rootdevice = ''; +my $rootdisk = ''; +my $rootpartition = ''; +my $image_dest = "/"; +my $realimageloc = "/$image_dir/"; +my $have_conffile = ""; +my $CONF_LOC = '/etc/kernel-img.conf'; +my $relative_links = ''; +my $silent_modules = ''; +my $silent_loader = ''; +my $warn_reboot = 'Yes'; # Warn that we are installing a version of + # the kernel we are running + +chdir('/') or die "could not chdir to /:$!\n"; +# remove multiple leading slashes; make sure there is at least one. +$realimageloc =~ s|^/*|/|o; +$realimageloc =~ s|/+|/|o; + + +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; + $reverse_symlink = "" if /^\s*reverse_symlinks\s*=\s*(no|false|0)\s*$/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; + $do_initrd = '' if /^\s*do_initrd\s*=\s*(no|false|0)\s*$/ig; + $warn_initrd = '' if /^\s*warn_initrd\s*=\s*(no|false|0)\s*$/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; + $relink_build_link = '' if /^\s*relink_build_link\s*=\s*(no|false|0)\s*$/ig; + $force_build_link = '' if /^\s*force_build_link\s*=\s*(no|false|0)\s*$/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; + $relative_links = "Yes" if /^\s*relative_links\s*=\s*(yes|true|1)\s*$/ig; + $do_initrd = "Yes" if /^\s*do_initrd\s*=\s*(yes|true|1)\s*$/ig; + $warn_initrd = "Yes" if /^\s*warn_initrd\s*=\s*(yes|true|1)\s*$/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; + $relink_build_link = 'Yes' if /^\s*relink_build_link\s*=\s*(yes|true|1)\s*$/ig; + $force_build_link = 'Yes' if /^\s*force_build_link\s*=\s*(yes|true|1)\s*$/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; + $have_conffile = "Yes"; + } +} + +if ($link_in_boot) { + $image_dest = "/$image_dir/"; + $image_dest =~ s|^/*|/|o; +} + +$image_dest = "$image_dest/"; +$image_dest =~ s|/+$|/|o; + +# The destdir may be gone by now. +if (-d "$image_dest") { + 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; + + +###################################################################### +###################################################################### +############ +###################################################################### +###################################################################### +sub remove_sym_link { + my $bad_image = $_[0]; + + warn "Removing symbolic link $bad_image \n"; + if ($loader =~ /lilo/i) + { + warn "Unless you used the optional flag in lilo, \n"; + } + warn " you may need to re-run your boot loader" . ($loader ? "[$loader]":"") + . "\n"; + # Remove the dangling link + unlink "$bad_image"; +} + +###################################################################### +###################################################################### +############ +###################################################################### +###################################################################### +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); +} + +###################################################################### +###################################################################### +############ +###################################################################### +###################################################################### +# This removes dangling symlinks. What do we do about hard links? Surely a +# something with the nane $image_dest . "$kimage" ought not to be left behind? +sub image_magic { + my $kimage = $_[0]; + my $image_dest = $_[1]; + + if (-l "$kimage") { + # There is a symbolic link + my $force_move = 0; + my $vmlinuz_target = readlink "$kimage"; + my $real_target = ''; + $real_target = abs_path($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 damaged link\n"; + # Remove the dangling link + &remove_sym_link("$kimage"); + } + else { + my $canonical_target = CanonicalizePath("$vmlinuz_target"); + if (! -e $canonical_target) { + warn "The link " . $image_dest . "$kimage is a dangling link\n"; + &remove_sym_link("$kimage"); + } + } + } +} + +# set the env var stem +$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; + } + } +} +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 { + warn "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"; + warn "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 ($postrm_hook) { + &run_hook("postrm", $postrm_hook); +} +if (-d "/etc/kernel/postrm.d") { + warn "Examining /etc/kernel/postrm.d .\n"; + system ("run-parts --verbose --exit-on-error --arg=$version " . + "--arg=$realimageloc$kimage-$version " . + "/etc/kernel/postrm.d") && + die "Failed to process /etc/kernel/postrm.d"; +} +if (-d "/etc/kernel/postrm.d/$version") { + warn "Examining /etc/kernel/postrm.d/$version .\n"; + system ("run-parts --verbose --exit-on-error --arg=$version " . + "--arg=$realimageloc$kimage-$version " . + "/etc/kernel/postrm.d/$version") && + die "Failed to process /etc/kernel/postrm.d/$version"; +} + +# check and remove damaged and dangling symlinks +if ($ARGV[0] !~ /upgrade/) { + system("$ramdisk -d -k " . $version . " > /dev/null 2>&1"); + if (-f $realimageloc . "initrd.img-$version.bak") { + unlink $realimageloc . "initrd.img-$version.bak"; + } + image_magic($kimage, $image_dest); + image_magic($kimage . ".old", $image_dest); + image_magic("initrd.img", $image_dest) if $initrd; + image_magic("initrd.img.old", $image_dest) if $initrd; +} + +exit 0; + +__END__ |