[mirror_ubuntu-zesty-kernel.git] / debian / control-scripts / prerm

#! /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";
  }
}

$initrd = '' if (! -x "$ramdisk");

$ENV{KERNEL_ARCH}=$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__
Commit	Line	Data
356bd1e1 LO	1	#! /usr/bin/perl
	2	# -- Mode: Perl --
	3	# image.prerm ---
	4	# Author : root ( root@melkor.pilgrim.umass.edu )
	5	# Created On : Fri May 17 03:28:59 1996
	6	# Created On Node : melkor.pilgrim.umass.edu
	7	# Last Modified By : Manoj Srivastava
	8	# Last Modified On : Sat Aug 5 13:14:17 2006
	9	# Last Machine Used: glaurung.internal.golden-gryphon.com
	10	# Update Count : 85
	11	# Status : Unknown, Use with caution!
	12	# HISTORY :
	13	# Description :
	14	#
	15	#
	16	# $Id: image.prerm,v 1.22 2003/10/07 16:24:20 srivasta Exp $
	17	#
	18	#
	19	#use strict;
	20
	21	$\|=1;
	22	# Predefined values:
	23	my $version = "=V";
	24	my $link_in_boot = ""; # Should be empty, mostly
	25	my $no_symlink = ""; # Should be empty, mostly
	26	my $reverse_symlink = ""; # Should be empty, mostly
	27	my $do_symlinks = "Yes"; # target machine defined
	28	my $do_boot_enable = "Yes"; # target machine defined
	29	my $do_bootfloppy = "Yes"; # target machine defined
	30	my $do_bootloader = "Yes"; # target machine defined
	31	my $move_image = ''; # target machine defined
	32	my $kimage = "=K"; # Should be empty, mostly
	33	my $loader = "=L"; # lilo, silo, quik, palo, vmelilo, or nettrom
	34	my $image_dir = "/boot"; # where the image is located
	35	my $clobber_modules = ''; # target machine defined
	36	my $initrd = "YES"; # initrd kernel
	37	my $use_hard_links = ''; # hardlinks do not wirk across fs boundaries
	38	my $postinst_hook = ''; #Normally we do not
	39	my $postrm_hook = ''; #Normally we do not
	40	my $preinst_hook = ''; #Normally we do not
	41	my $prerm_hook = ''; #Normally we do not
	42	my $minimal_swap = ''; # Do not swap symlinks
	43	my $ignore_depmod_err = ''; # normally we do not
	44	my $relink_build_link = 'YES'; # There is no harm in checking the link
	45	my $force_build_link = ''; # There is no harm in checking the link
	46	my $kernel_arch = "=B";
	47	my $ramdisk = "/usr/sbin/update-initramfs";
	48	my $package_name = "linux-image-$version";
	49
	50	my $Loader = "NoLOADER"; #
	51	$Loader = "LILO" if $loader =~ /^lilo/io;
	52	$Loader = "SILO" if $loader =~ /^silo/io;
	53	$Loader = "QUIK" if $loader =~ /^quik/io;
	54	$Loader = "yaboot" if $loader =~ /^yaboot/io;
	55	$Loader = "PALO" if $loader =~ /^palo/io;
	56	$Loader = "NETTROM" if $loader =~ /^nettrom/io;
	57	$Loader = "VMELILO" if $loader =~ /^vmelilo/io;
	58	$Loader = "ZIPL" if $loader =~ /^zipl/io;
	59	$Loader = "ELILO" if $loader =~ /^elilo/io;
	60
	61
	62	# This should not point to /tmp, because of security risks.
	63	my $temp_file_name = "/var/log/$loader" . "_log.$$";
	64
65	#known variables
66	my $image_dest = "/";
67	my $realimageloc = "/$image_dir/";
68	my $have_conffile = "";
69	my $CONF_LOC = '/etc/kernel-img.conf';
70	my $relative_links = '';
71	my $silent_loader = '';
72	my $warn_reboot = 'Yes'; # Warn that we are installing a version of
73	# the kernel we are running
74
75	# remove multiple leading slashes; make sure there is at least one.
76	$realimageloc =~ s\|^/*\|/\|o;
77	$realimageloc =~ s\|/+\|/\|o;
78
79	my $DEBUG = 0;
80
81	# Variables used
82	my $image='';
83	my $ret=0;
84	my $seen='';
85	my $answer='';
86	my $running = '';
87	my $WouldInvalidate = 0;
88
89	if ($ARGV[0] && ($ARGV[0] =~ /remove/ \|\| $ARGV[0] =~ /upgrade/)) {
90	if (-l "/usr/doc/linux-image-$version") {
91	unlink "/usr/doc/linux-image-$version";
92	}
93	}
94
95	# Ignore all invocations uxcept when called on to remove
96	exit 0 unless ($ARGV[0] && $ARGV[0] =~ /remove/) ;
97
98	# Paranoid check to make sure that the correct value is put in there
99	if (! $kimage) { $kimage = "vmlinuz";} # Hmm. empty
100	elsif ($kimage =~ m/^b?uImage$/o) { $kimage = "vmlinuz";} # these produce vmlinuz
101	elsif ($kimage =~ m/^b?zImage$/o) { $kimage = "vmlinuz";} # these produce vmlinuz
102	elsif ($kimage =~ m/^[iI]mage$/o) { my $nop = $kimage; }
103	elsif ($kimage =~ m/^vmlinux$/o) { my $nop = $kimage; }
104	else { $kimage = "vmlinuz";} # Default
105
106	if (-r "$CONF_LOC" && -f "$CONF_LOC" ) {
107	if (open(CONF, "$CONF_LOC")) {
108	while (<CONF>) {
109	chomp;
110	s/\#.*$//g;
111	next if /^\s*$/;
112
113	$do_symlink = "" if /^\sdo_symlinks\s=\s(no\|false\|0)\s$/ig;
114	$no_symlink = "" if /^\sno_symlinks\s=\s(no\|false\|0)\s$/ig;
115	$reverse_symlink = "" if /^\sreverse_symlinks\s=\s(no\|false\|0)\s$/ig;
116	$link_in_boot = "" if /^\simage_in_boot\s=\s(no\|false\|0)\s$/ig;
117	$link_in_boot = "" if /^\slink_in_boot\s=\s(no\|false\|0)\s$/ig;
118	$move_image = "" if /^\smove_image\s=\s(no\|false\|0)\s$/ig;
119	$clobber_modules = '' if /^\sclobber_modules\s=\s(no\|false\|0)\s$/ig;
120	$do_boot_enable = '' if /^\sdo_boot_enable\s=\s(no\|false\|0)\s$/ig;
121	$do_bootfloppy = '' if /^\sdo_bootfloppy\s=\s(no\|false\|0)\s$/ig;
122	$relative_links = '' if /^\srelative_links \s=\s(no\|false\|0)\s$/ig;
123	$do_bootloader = '' if /^\sdo_bootloader\s=\s(no\|false\|0)\s$/ig;
124	$do_initrd = '' if /^\sdo_initrd\s=\s(no\|false\|0)\s$/ig;
125	$use_hard_links = '' if /^\suse_hard_links\s=\s(no\|false\|0)\s$/ig;
126	$silent_loader = '' if /^\ssilent_loader\s=\s(no\|false\|0)\s$/ig;
127	$warn_reboot = '' if /^\swarn_reboot\s=\s(no\|false\|0)\s$/ig;
128	$minimal_swap = '' if /^\sminimal_swap\s=\s(no\|false\|0)\s$/ig;
129	$ignore_depmod_err = '' if /^\signore_depmod_err\s=\s(no\|false\|0)\s$/ig;
130	$relink_build_link = '' if /^\srelink_build_link\s=\s(no\|false\|0)\s$/ig;
131	$force_build_link = '' if /^\sforce_build_link\s=\s(no\|false\|0)\s$/ig;
132
133
134	$do_symlink = "Yes" if /^\sdo_symlinks\s=\s(yes\|true\|1)\s$/ig;
135	$no_symlink = "Yes" if /^\sno_symlinks\s=\s(yes\|true\|1)\s$/ig;
136	$reverse_symlink = "Yes" if /^\sreverse_symlinks\s=\s(yes\|true\|1)\s$/ig;
137	$link_in_boot = "Yes" if /^\simage_in_boot\s=\s(yes\|true\|1)\s$/ig;
138	$link_in_boot = "Yes" if /^\slink_in_boot\s=\s(yes\|true\|1)\s$/ig;
139	$move_image = "Yes" if /^\smove_image\s=\s(yes\|true\|1)\s$/ig;
140	$clobber_modules = "Yes" if /^\sclobber_modules\s=\s(yes\|true\|1)\s$/ig;
141	$do_boot_enable = "Yes" if /^\sdo_boot_enable\s=\s(yes\|true\|1)\s$/ig;
142	$do_bootfloppy = "Yes" if /^\sdo_bootfloppy\s=\s(yes\|true\|1)\s$/ig;
143	$do_bootloader = "Yes" if /^\sdo_bootloader\s=\s(yes\|true\|1)\s$/ig;
144	$relative_links = "Yes" if /^\srelative_links\s=\s(yes\|true\|1)\s$/ig;
145	$do_initrd = "Yes" if /^\sdo_initrd\s=\s(yes\|true\|1)\s$/ig;
146	$use_hard_links = "Yes" if /^\suse_hard_links\s=\s(yes\|true\|1)\s$/ig;
147	$silent_loader = 'Yes' if /^\ssilent_loader\s=\s(yes\|true\|1)\s$/ig;
148	$warn_reboot = 'Yes' if /^\swarn_reboot\s=\s(yes\|true\|1)\s$/ig;
149	$minimal_swap = 'Yes' if /^\sminimal_swap\s=\s(yes\|true\|1)\s$/ig;
150	$ignore_depmod_err = 'Yes' if /^\signore_depmod_err\s=\s(yes\|true\|1)\s$/ig;
151	$relink_build_link = 'Yes' if /^\srelink_build_link\s=\s(yes\|true\|1)\s$/ig;
152	$force_build_link = 'Yes' if /^\sforce_build_link\s=\s(yes\|true\|1)\s$/ig;
153
154	$image_dest = "$1" if /^\simage_dest\s=\s*(\S+)/ig;
155	$postinst_hook = "$1" if /^\spostinst_hook\s=\s*(\S+)/ig;
156	$postrm_hook = "$1" if /^\spostrm_hook\s=\s*(\S+)/ig;
157	$preinst_hook = "$1" if /^\spreinst_hook\s=\s*(\S+)/ig;
158	$prerm_hook = "$1" if /^\sprerm_hook\s=\s*(\S+)/ig;
159	$ramdisk = "$1" if /^\sramdisk\s=\s*(.+)$/ig;
160	}
161	close CONF;
162	$have_conffile = "Yes";
163	}
164	}
165
e1a4215d	166	$initrd = '' if (! -x "$ramdisk");
356bd1e1 LO	167
	168	$ENV{KERNEL_ARCH}=$kernel_arch if $kernel_arch;
	169
	170	#check to see if we are trying to remove a running kernel
	171	# if so we abort right now.
	172	chop($running=`uname -r`);
	173	if ($running eq $version) {
	174	print STDERR "WARN: Proceeding with removing running kernel image.\n";
	175	}
	176
	177	#Now, they have an alternate kernel which they are currently running
	178
	179	# This is just us being nice to lilo users.
	180
	181	chdir("/") or die "could not chdir to /:$!\n";
	182
	183	if (-f "/etc/$loader.conf") { #I know, could be a link, but ..
	184	open (LILO, "/etc/$loader.conf") \|\| &success(); # this is not critical
	185	while (<LILO>) {
	186	chop;
	187	s/\#.*//; # nix the comments
	188	next unless /^\simage\s=\s(\S+)/o;
	189	$image = $1;
	190	if ($image && -e $image) {
	191	while (defined($image) && -l $image) {
	192	$image = readlink ($image);
	193	}
	194	if (defined($image) && -e $image) {
	195	$WouldInvalidate \|= $image =~ /$kimage-$version/;
	196	}
	197	else {
	198	&success(); # invalid $loader.conf file
	199	}
	200	}
	201	else {
	202	&success(); # invalid $loader.conf file
	203	}
	204	}
	205	close (LILO);
	206	if ($WouldInvalidate) {
	207	print STFERR "WARN: Proceeding with removing running kernel image.\n";
	208	&success();
	209	}
	210	}
	211
	212
	213	# set the env var stem
	214	$ENV{'STEM'} = "linux";
	215
	216	sub exec_script {
	217	my $type = shift;
	218	my $script = shift;
	219	print STDERR "Running $type hook script $script.\n";
	220	system ("$script $version $realimageloc$kimage-$version") &&
	221	print STDERR "User $type hook script [$script] ";
	222	if ($?) {
	223	if ($? == -1) {
	224	print STDERR "failed to execute: $!\n";
	225	}
	226	elsif ($? & 127) {
	227	printf STDERR "died with signal %d, %s coredump\n",
	228	($? & 127), ($? & 128) ? 'with' : 'without';
	229	}
	230	else {
231	printf STDERR "exited with value %d\n", $? >> 8;
232	}
233	exit $? >> 8;
234	}
235	}
236	sub run_hook {
237	my $type = shift;
238	my $script = shift;
239	if ($script =~ m,^/,) {
240	# Full path provided for the hook script
241	if (-x "$script") {
242	&exec_script($type,$script);
243	}
244	else {
245	die "The provided $type hook script [$script] could not be run.\n";
246	}
247	}
248	else {
249	# Look for it in a safe path
250	for my $path ('/bin', '/sbin', '/usr/bin', '/usr/sbin') {
251	if (-x "$path/$script") {
252	&exec_script($type, "$path/$script");
253	return 0;
254	}
255	}
256	# No luck
257	print STDERR "Could not find $type hook script [$script].\n";
258	die "Looked in: '/bin', '/sbin', '/usr/bin', '/usr/sbin'\n";
259	}
260	}
261
262
263	my $options;
264	for (@ARGV) {
265	s,','\\'',g;
266	$options .= " '$_'";
267	}
268	$ENV{'DEB_MAINT_PARAMS'}="$options";
269
270	## Run user hook script here, if any
271	if (-x "$prerm_hook") {
272	&run_hook("prerm", $prerm_hook);
273	}
274	if (-d "/etc/kernel/prerm.d") {
275	print STDERR "Examining /etc/kernel/prerm.d.\n";
276	system ("run-parts --verbose --exit-on-error --arg=$version " .
277	"--arg=$realimageloc$kimage-$version /etc/kernel/prerm.d") &&
278	die "Failed to process /etc/kernel/prerm.d";
279	}
280	if (-d "/etc/kernel/prerm.d/$version") {
281	print STDERR "Examining /etc/kernel/prerm.d/$version.\n";
282	system ("run-parts --verbose --exit-on-error --arg=$version" .
283	" --arg=$realimageloc$kimage-$version " .
284	"/etc/kernel/prerm.d/$version") &&
285	die "Failed to process /etc/kernel/prerm.d/$version";
286	}
287
288	sub success () {
289	# NOTE: need to keep this list in sync with rules.d/2-binary-arch.mk
290	my %files_to_keep = (
291	'modules.builtin' => 1,
292	'modules.order' => 1,
293	);
294	my $short;
295	for my $file (</lib/modules/$version/modules.*>) {
296	$short = $file; $short =~ s,.*/,,;
297	if (!defined $files_to_keep{$short}) {
298	unlink "$file";
299	}
300	}
301	exit 0;
302	}
303
304
305
306	&success();
307	exit 0;
308	__END__
309
310
311
312
313