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|
#! /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__
|
