[ SEA-GHOST MINI SHELL]
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| Current File : /var/lib/dpkg/info/linux-image-4.4.0-139-generic.postrm |
#! /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 = "4.4.0-139-generic";
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, 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 = "x86_64";
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";
}
}
$initrd = '' if (! -x "$ramdisk");
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__
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