diff options
Diffstat (limited to 'debian/control-scripts/prerm')
-rw-r--r-- | debian/control-scripts/prerm | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/debian/control-scripts/prerm b/debian/control-scripts/prerm new file mode 100644 index 00000000000..07e41461d3a --- /dev/null +++ b/debian/control-scripts/prerm @@ -0,0 +1,312 @@ +#! /usr/bin/perl +# -*- Mode: Perl -*- +# image.prerm --- +# Author : root ( root@melkor.pilgrim.umass.edu ) +# Created On : Fri May 17 03:28:59 1996 +# Created On Node : melkor.pilgrim.umass.edu +# Last Modified By : Manoj Srivastava +# Last Modified On : Sat Aug 5 13:14:17 2006 +# Last Machine Used: glaurung.internal.golden-gryphon.com +# Update Count : 85 +# Status : Unknown, Use with caution! +# HISTORY : +# Description : +# +# +# $Id: image.prerm,v 1.22 2003/10/07 16:24:20 srivasta Exp $ +# +# +#use strict; + +$|=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_symlinks = "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 $use_hard_links = ''; # hardlinks do not wirk 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 = ''; # There is no harm in checking the 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 $image_dest = "/"; +my $realimageloc = "/$image_dir/"; +my $have_conffile = ""; +my $CONF_LOC = '/etc/kernel-img.conf'; +my $relative_links = ''; +my $silent_loader = ''; +my $warn_reboot = 'Yes'; # Warn that we are installing a version of + # the kernel we are running + +# remove multiple leading slashes; make sure there is at least one. +$realimageloc =~ s|^/*|/|o; +$realimageloc =~ s|/+|/|o; + +my $DEBUG = 0; + +# Variables used +my $image=''; +my $ret=0; +my $seen=''; +my $answer=''; +my $running = ''; +my $WouldInvalidate = 0; + +if ($ARGV[0] && ($ARGV[0] =~ /remove/ || $ARGV[0] =~ /upgrade/)) { + if (-l "/usr/doc/linux-image-$version") { + unlink "/usr/doc/linux-image-$version"; + } +} + +# Ignore all invocations uxcept when called on to remove +exit 0 unless ($ARGV[0] && $ARGV[0] =~ /remove/) ; + +# 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 { $kimage = "vmlinuz";} # Default + +if (-r "$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; + $use_hard_links = '' if /^\s*use_hard_links\s*=\s*(no|false|0)\s*$/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; + $use_hard_links = "Yes" if /^\s*use_hard_links\s*=\s*(yes|true|1)\s*$/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; + $have_conffile = "Yes"; + } +} + + +$ENV{KERNEL_ARCH}=$kernel_arch if $kernel_arch; + +#check to see if we are trying to remove a running kernel +# if so we abort right now. +chop($running=`uname -r`); +if ($running eq $version) { + print STDERR "WARN: Proceeding with removing running kernel image.\n"; +} + +#Now, they have an alternate kernel which they are currently running + +# This is just us being nice to lilo users. + +chdir("/") or die "could not chdir to /:$!\n"; + +if (-f "/etc/$loader.conf") { #I know, could be a link, but .. + open (LILO, "/etc/$loader.conf") || &success(); # this is not critical + while (<LILO>) { + chop; + s/\#.*//; # nix the comments + next unless /^\s*image\s*=\s(\S+)/o; + $image = $1; + if ($image && -e $image) { + while (defined($image) && -l $image) { + $image = readlink ($image); + } + if (defined($image) && -e $image) { + $WouldInvalidate |= $image =~ /$kimage-$version/; + } + else { + &success(); # invalid $loader.conf file + } + } + else { + &success(); # invalid $loader.conf file + } + } + close (LILO); + if ($WouldInvalidate) { + print STFERR "WARN: Proceeding with removing running kernel image.\n"; + &success(); + } +} + + +# 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 (-x "$prerm_hook") { + &run_hook("prerm", $prerm_hook); +} +if (-d "/etc/kernel/prerm.d") { + print STDERR "Examining /etc/kernel/prerm.d.\n"; + system ("run-parts --verbose --exit-on-error --arg=$version " . + "--arg=$realimageloc$kimage-$version /etc/kernel/prerm.d") && + die "Failed to process /etc/kernel/prerm.d"; +} +if (-d "/etc/kernel/prerm.d/$version") { + print STDERR "Examining /etc/kernel/prerm.d/$version.\n"; + system ("run-parts --verbose --exit-on-error --arg=$version" . + " --arg=$realimageloc$kimage-$version " . + "/etc/kernel/prerm.d/$version") && + die "Failed to process /etc/kernel/prerm.d/$version"; +} + +sub success () { + # NOTE: need to keep this list in sync with rules.d/2-binary-arch.mk + my %files_to_keep = ( + 'modules.builtin' => 1, + 'modules.order' => 1, + ); + my $short; + for my $file (</lib/modules/$version/modules.*>) { + $short = $file; $short =~ s,.*/,,; + if (!defined $files_to_keep{$short}) { + unlink "$file"; + } + } + exit 0; +} + + + +&success(); +exit 0; +__END__ + + + + + |