[mirror_ubuntu-artful-kernel.git] / debian / control-scripts / 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           = "=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";
  }
}

$initrd = '' if (! -x "$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__
Commit	Line	Data
fef4fb4a LO	1	#! /usr/bin/perl
	2	# -- Mode: Cperl --
	3	# image.postrm ---
	4	# Author : Manoj Srivastava ( srivasta@glaurung.green-gryphon.com )
	5	# Created On : Sat May 15 11:05:13 1999
	6	# Created On Node : glaurung.green-gryphon.com
	7	# Last Modified By : Manoj Srivastava
	8	# Last Modified On : Wed Sep 13 11:26:19 2006
	9	# Last Machine Used: glaurung.internal.golden-gryphon.com
	10	# Update Count : 57
	11	# Status : Unknown, Use with caution!
	12	# HISTORY :
	13	# Description :
	14	#
	15	# $Id: image.postrm,v 1.31 2003/10/07 16:24:20 srivasta Exp $
	16	#
	17
	18
	19	#
	20	#use strict; #for debugging
	21	use Cwd 'abs_path';
	22
	23	$\|=1;
	24
	25	# Predefined values:
	26	my $version = "=V";
	27	my $link_in_boot = ""; # Should be empty, mostly
	28	my $no_symlink = ""; # Should be empty, mostly
	29	my $reverse_symlink = ""; # Should be empty, mostly
	30	my $do_symlink = "Yes"; # target machine defined
	31	my $do_boot_enable = "Yes"; # target machine defined
	32	my $do_bootfloppy = "Yes"; # target machine defined
	33	my $do_bootloader = "Yes"; # target machine defined
	34	my $move_image = ''; # target machine defined
	35	my $kimage = "=K"; # Should be empty, mostly
	36	my $loader = "=L"; # lilo, silo, quik, palo, vmelilo, or nettrom
	37	my $image_dir = "/boot"; # where the image is located
	38	my $clobber_modules = ''; # target machine defined
	39	my $initrd = "YES"; # initrd kernel
	40	my $do_initrd = ''; # Normally, we don't
	41	my $warn_initrd = 'YES'; # Normally we do
	42	my $use_hard_links = ''; # hardlinks do not work across fs boundaries
	43	my $postinst_hook = ''; #Normally we do not
	44	my $postrm_hook = ''; #Normally we do not
	45	my $preinst_hook = ''; #Normally we do not
	46	my $prerm_hook = ''; #Normally we do not
	47	my $minimal_swap = ''; # Do not swap symlinks
	48	my $ignore_depmod_err = ''; # normally we do not
	49	my $relink_build_link = 'YES'; # There is no harm in checking the link
	50	my $force_build_link = ''; # we shall not create a dangling link
	51	my $kernel_arch = "=B";
	52	my $ramdisk = "/usr/sbin/update-initramfs";
	53	my $package_name = "linux-image-$version";
	54
	55	my $Loader = "NoLOADER"; #
	56	$Loader = "LILO" if $loader =~ /^lilo/io;
	57	$Loader = "SILO" if $loader =~ /^silo/io;
	58	$Loader = "QUIK" if $loader =~ /^quik/io;
	59	$Loader = "yaboot" if $loader =~ /^yaboot/io;
	60	$Loader = "PALO" if $loader =~ /^palo/io;
	61	$Loader = "NETTROM" if $loader =~ /^nettrom/io;
	62	$Loader = "VMELILO" if $loader =~ /^vmelilo/io;
	63	$Loader = "ZIPL" if $loader =~ /^zipl/io;
	64	$Loader = "ELILO" if $loader =~ /^elilo/io;
65
66
67	# This should not point to /tmp, because of security risks.
68	my $temp_file_name = "/var/log/$loader" . "_log.$$";
69
70	#known variables
71	my @boilerplate = ();
72	my @silotemplate = ();
73	my @quiktemplate = ();
74	my @palotemplate = ();
75	my @vmelilotemplate = ();
76	my $bootdevice = '';
77	my $rootdevice = '';
78	my $rootdisk = '';
79	my $rootpartition = '';
80	my $image_dest = "/";
81	my $realimageloc = "/$image_dir/";
82	my $have_conffile = "";
83	my $CONF_LOC = '/etc/kernel-img.conf';
84	my $relative_links = '';
85	my $silent_modules = '';
86	my $silent_loader = '';
87	my $warn_reboot = 'Yes'; # Warn that we are installing a version of
88	# the kernel we are running
89
90	chdir('/') or die "could not chdir to /:$!\n";
91	# remove multiple leading slashes; make sure there is at least one.
92	$realimageloc =~ s\|^/*\|/\|o;
93	$realimageloc =~ s\|/+\|/\|o;
94
95
96	if (-r "$CONF_LOC" && -f "$CONF_LOC" ) {
97	if (open(CONF, "$CONF_LOC")) {
98	while (<CONF>) {
99	chomp;
100	s/\#.*$//g;
101	next if /^\s*$/;
102
103	$do_symlink = "" if /^\sdo_symlinks\s=\s(no\|false\|0)\s$/ig;
104	$no_symlink = "" if /^\sno_symlinks\s=\s(no\|false\|0)\s$/ig;
105	$reverse_symlink = "" if /^\sreverse_symlinks\s=\s(no\|false\|0)\s$/ig;
106	$link_in_boot = "" if /^\simage_in_boot\s=\s(no\|false\|0)\s$/ig;
107	$link_in_boot = "" if /^\slink_in_boot\s=\s(no\|false\|0)\s$/ig;
108	$move_image = "" if /^\smove_image\s=\s(no\|false\|0)\s$/ig;
109	$clobber_modules = '' if /^\sclobber_modules\s=\s(no\|false\|0)\s$/ig;
110	$do_boot_enable = '' if /^\sdo_boot_enable\s=\s(no\|false\|0)\s$/ig;
111	$do_bootfloppy = '' if /^\sdo_bootfloppy\s=\s(no\|false\|0)\s$/ig;
112	$relative_links = '' if /^\srelative_links \s=\s(no\|false\|0)\s$/ig;
113	$do_bootloader = '' if /^\sdo_bootloader\s=\s(no\|false\|0)\s$/ig;
114	$do_initrd = '' if /^\sdo_initrd\s=\s(no\|false\|0)\s$/ig;
115	$warn_initrd = '' if /^\swarn_initrd\s=\s(no\|false\|0)\s$/ig;
116	$use_hard_links = '' if /^\suse_hard_links\s=\s(no\|false\|0)\s$/ig;
117	$silent_modules = '' if /^\ssilent_modules\s=\s(no\|false\|0)\s$/ig;
118	$silent_loader = '' if /^\ssilent_loader\s=\s(no\|false\|0)\s$/ig;
119	$warn_reboot = '' if /^\swarn_reboot\s=\s(no\|false\|0)\s$/ig;
120	$minimal_swap = '' if /^\sminimal_swap\s=\s(no\|false\|0)\s$/ig;
121	$ignore_depmod_err = '' if /^\signore_depmod_err\s=\s(no\|false\|0)\s$/ig;
122	$relink_build_link = '' if /^\srelink_build_link\s=\s(no\|false\|0)\s$/ig;
123	$force_build_link = '' if /^\sforce_build_link\s=\s(no\|false\|0)\s$/ig;
124
125	$do_symlink = "Yes" if /^\sdo_symlinks\s=\s(yes\|true\|1)\s$/ig;
126	$no_symlink = "Yes" if /^\sno_symlinks\s=\s(yes\|true\|1)\s$/ig;
127	$reverse_symlink = "Yes" if /^\sreverse_symlinks\s=\s(yes\|true\|1)\s$/ig;
128	$link_in_boot = "Yes" if /^\simage_in_boot\s=\s(yes\|true\|1)\s$/ig;
129	$link_in_boot = "Yes" if /^\slink_in_boot\s=\s(yes\|true\|1)\s$/ig;
130	$move_image = "Yes" if /^\smove_image\s=\s(yes\|true\|1)\s$/ig;
131	$clobber_modules = "Yes" if /^\sclobber_modules\s=\s(yes\|true\|1)\s$/ig;
132	$do_boot_enable = "Yes" if /^\sdo_boot_enable\s=\s(yes\|true\|1)\s$/ig;
133	$do_bootfloppy = "Yes" if /^\sdo_bootfloppy\s=\s(yes\|true\|1)\s$/ig;
134	$do_bootloader = "Yes" if /^\sdo_bootloader\s=\s(yes\|true\|1)\s$/ig;
135	$relative_links = "Yes" if /^\srelative_links\s=\s(yes\|true\|1)\s$/ig;
136	$do_initrd = "Yes" if /^\sdo_initrd\s=\s(yes\|true\|1)\s$/ig;
137	$warn_initrd = "Yes" if /^\swarn_initrd\s=\s(yes\|true\|1)\s$/ig;
138	$use_hard_links = "Yes" if /^\suse_hard_links\s=\s(yes\|true\|1)\s$/ig;
139	$silent_modules = 'Yes' if /^\ssilent_modules\s=\s(yes\|true\|1)\s$/ig;
140	$silent_loader = 'Yes' if /^\ssilent_loader\s=\s(yes\|true\|1)\s$/ig;
141	$warn_reboot = 'Yes' if /^\swarn_reboot\s=\s(yes\|true\|1)\s$/ig;
142	$minimal_swap = 'Yes' if /^\sminimal_swap\s=\s(yes\|true\|1)\s$/ig;
143	$ignore_depmod_err = 'Yes' if /^\signore_depmod_err\s=\s(yes\|true\|1)\s$/ig;
144	$relink_build_link = 'Yes' if /^\srelink_build_link\s=\s(yes\|true\|1)\s$/ig;
145	$force_build_link = 'Yes' if /^\sforce_build_link\s=\s(yes\|true\|1)\s$/ig;
146
147	$image_dest = "$1" if /^\simage_dest\s=\s*(\S+)/ig;
148	$postinst_hook = "$1" if /^\spostinst_hook\s=\s*(\S+)/ig;
149	$postrm_hook = "$1" if /^\spostrm_hook\s=\s*(\S+)/ig;
150	$preinst_hook = "$1" if /^\spreinst_hook\s=\s*(\S+)/ig;
151	$prerm_hook = "$1" if /^\sprerm_hook\s=\s*(\S+)/ig;
152	$ramdisk = "$1" if /^\sramdisk\s=\s*(.+)$/ig;
153	}
154	close CONF;
155	$have_conffile = "Yes";
156	}
157	}
158
ab9c49b0 MHC	159	$initrd = '' if (! -x "$ramdisk");
ab9c49b0 MHC	160
fef4fb4a LO	161	if ($link_in_boot) {
	162	$image_dest = "/$image_dir/";
	163	$image_dest =~ s\|^/*\|/\|o;
	164	}
	165
	166	$image_dest = "$image_dest/";
	167	$image_dest =~ s\|/+$\|/\|o;
	168
	169	# The destdir may be gone by now.
	170	if (-d "$image_dest") {
	171	chdir("$image_dest") or die "could not chdir to $image_dest:$!\n";
	172	}
	173
	174	# Paranoid check to make sure that the correct value is put in there
	175	if (! $kimage) {$kimage = "vmlinuz"} # Hmm. empty
	176	elsif ($kimage =~ m/^b?uImage$/o) {$kimage = "vmlinuz"} # these produce vmlinuz
	177	elsif ($kimage =~ m/^b?zImage$/o) {$kimage = "vmlinuz"} # these produce vmlinuz
	178	elsif ($kimage =~ m/^[iI]mage$/o) { my $nop = $kimage;}
	179	elsif ($kimage =~ m/^vmlinux$/o) { my $nop = $kimage;}
	180	else {$kimage = "vmlinuz"} # default
	181
	182	$ENV{KERNEL_ARCH}=$kernel_arch if $kernel_arch;
	183
	184
	185	######################################################################
	186	######################################################################
	187	############
	188	######################################################################
	189	######################################################################
	190	sub remove_sym_link {
	191	my $bad_image = $_[0];
	192
	193	warn "Removing symbolic link $bad_image \n";
	194	if ($loader =~ /lilo/i)
	195	{
	196	warn "Unless you used the optional flag in lilo, \n";
	197	}
	198	warn " you may need to re-run your boot loader" . ($loader ? "[$loader]":"")
	199	. "\n";
	200	# Remove the dangling link
	201	unlink "$bad_image";
	202	}
	203
	204	######################################################################
	205	######################################################################
	206	############
	207	######################################################################
	208	######################################################################
	209	sub CanonicalizePath {
	210	my $path = join '/', @_;
	211	my @work = split '/', $path;
	212	my @out;
	213	my $is_absolute;
	214
	215	if (@work && $work[0] eq "") { $is_absolute = 1; shift @work; }
	216
	217	while (@work) {
	218	my $seg = shift @work;
	219	if ($seg eq "." \|\| $seg eq "") {
	220	} elsif ($seg eq "..") {
	221	if (@out && $out[-1] ne "..") {
	222	pop @out;
	223	} else {
	224	# Leading "..", or "../..", etc.
225	push @out, $seg;
226	}
227	} else {
228	push @out, $seg;
229	}
230	}
231
232	unshift @out, "" if $is_absolute;
233	return join('/', @out);
234	}
235
236	######################################################################
237	######################################################################
238	############
239	######################################################################
240	######################################################################
241	# This removes dangling symlinks. What do we do about hard links? Surely a
242	# something with the nane $image_dest . "$kimage" ought not to be left behind?
243	sub image_magic {
244	my $kimage = $_[0];
245	my $image_dest = $_[1];
246
247	if (-l "$kimage") {
248	# There is a symbolic link
249	my $force_move = 0;
250	my $vmlinuz_target = readlink "$kimage";
251	my $real_target = '';
252	$real_target = abs_path($vmlinuz_target) if defined ($vmlinuz_target);
253	if (!defined($vmlinuz_target) \|\| ! -f "$real_target") {
254	# what, a dangling symlink?
255	warn "The link " . $image_dest . "$kimage is a damaged link\n";
256	# Remove the dangling link
257	&remove_sym_link("$kimage");
258	}
259	else {
260	my $canonical_target = CanonicalizePath("$vmlinuz_target");
261	if (! -e $canonical_target) {
262	warn "The link " . $image_dest . "$kimage is a dangling link\n";
263	&remove_sym_link("$kimage");
264	}
265	}
266	}
267	}
268
269	# set the env var stem
270	$ENV{'STEM'} = "linux";
271
272	sub exec_script {
273	my $type = shift;
274	my $script = shift;
275	print STDERR "Running $type hook script $script.\n";
276	system ("$script $version $realimageloc$kimage-$version") &&
277	print STDERR "User $type hook script [$script] ";
278	if ($?) {
279	if ($? == -1) {
280	print STDERR "failed to execute: $!\n";
281	}
282	elsif ($? & 127) {
283	printf STDERR "died with signal %d, %s coredump\n",
284	($? & 127), ($? & 128) ? 'with' : 'without';
285	}
286	else {
287	printf STDERR "exited with value %d\n", $? >> 8;
288	}
289	}
290	}
291	sub run_hook {
292	my $type = shift;
293	my $script = shift;
294	if ($script =~ m,^/,) {
295	# Full path provided for the hook script
296	if (-x "$script") {
297	&exec_script($type,$script);
298	}
299	else {
300	warn "The provided $type hook script [$script] could not be run.\n";
301	}
302	}
303	else {
304	# Look for it in a safe path
305	for my $path ('/bin', '/sbin', '/usr/bin', '/usr/sbin') {
306	if (-x "$path/$script") {
307	&exec_script($type, "$path/$script");
308	return 0;
309	}
310	}
311	# No luck
312	print STDERR "Could not find $type hook script [$script].\n";
313	warn "Looked in: '/bin', '/sbin', '/usr/bin', '/usr/sbin'\n";
314	}
315	}
316
317	my $options;
318	for (@ARGV) {
319	s,','\\'',g;
320	$options .= " '$_'";
321	}
322	$ENV{'DEB_MAINT_PARAMS'}="$options";
323
324	## Run user hook script here, if any
325	if ($postrm_hook) {
326	&run_hook("postrm", $postrm_hook);
327	}
328	if (-d "/etc/kernel/postrm.d") {
329	warn "Examining /etc/kernel/postrm.d .\n";
330	system ("run-parts --verbose --exit-on-error --arg=$version " .
331	"--arg=$realimageloc$kimage-$version " .
332	"/etc/kernel/postrm.d") &&
333	die "Failed to process /etc/kernel/postrm.d";
334	}
335	if (-d "/etc/kernel/postrm.d/$version") {
336	warn "Examining /etc/kernel/postrm.d/$version .\n";
337	system ("run-parts --verbose --exit-on-error --arg=$version " .
338	"--arg=$realimageloc$kimage-$version " .
339	"/etc/kernel/postrm.d/$version") &&
340	die "Failed to process /etc/kernel/postrm.d/$version";
341	}
342
343	# check and remove damaged and dangling symlinks
344	if ($ARGV[0] !~ /upgrade/) {
345	system("$ramdisk -d -k " . $version . " > /dev/null 2>&1");
346	if (-f $realimageloc . "initrd.img-$version.bak") {
347	unlink $realimageloc . "initrd.img-$version.bak";
348	}
349	image_magic($kimage, $image_dest);
350	image_magic($kimage . ".old", $image_dest);
351	image_magic("initrd.img", $image_dest) if $initrd;
352	image_magic("initrd.img.old", $image_dest) if $initrd;
353	}
354
355	exit 0;
356
357	__END__
358
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363