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

#! /usr/bin/perl
#                              -*- Mode: Cperl -*-
# image.preinst ---
# Author           : Manoj Srivastava ( srivasta@tiamat.datasync.com )
# Created On       : Sun Jun 14 03:38:02 1998
# Created On Node  : tiamat.datasync.com
# Last Modified By : Manoj Srivastava
# Last Modified On : Sun Sep 24 14:04:42 2006
# Last Machine Used: glaurung.internal.golden-gryphon.com
# Update Count     : 99
# Status           : Unknown, Use with caution!
# HISTORY          :
# Description      :
#
#

#
#use strict; #for debugging

use Debconf::Client::ConfModule qw(:all);
version('2.0');
my $capb=capb("backup");

$|=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, nettrom
                                # or elilo
my $image_dir       = "/boot";     # where the image is located
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_src_link   = 'YES';	# There is no harm in checking the link
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";  # List of tools to create initial ram fs.
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;


#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_loader   = '';
my $warn_reboot     = '';        # Warn that we are installing a version of
                                 # the kernel we are running

my $modules_base    = '/lib/modules';

die "Pre inst Internal error. Aborting." unless $version;

exit 0 if $ARGV[0] =~ /abort-upgrade/;
exit 1 unless $ARGV[0] =~ /(install|upgrade)/;

$arch = `uname -i`;
if ($arch =~ m/86/) {
	system ("grep -q ' pae ' /proc/cpuinfo");
	if ($?) {
			print STDERR "This kernel does not support a non-PAE CPU.\n";
			exit 1;
	}
}

# 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;
      $do_boot_enable  = '' if /^\s*do_boot_enable\s*=\s*(no|false|0)\s*$/ig;
      $do_bootfloppy   = '' if /^\s*do_bootfloppy\s*=\s*(no|false|0)\s*$/ig;
      $do_bootloader   = '' if /^\s*do_bootloader\s*=\s*(no|false|0)\s*$/ig;
      $relative_links  = '' if /^\s*relative_links \s*=\s*(no|false|0)\s*$/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;
      $relink_src_link   = '' if /^\s*relink_src_link\s*=\s*(no|false|0)\s*$/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;
      $do_boot_enable  = "Yes" if /^\s*do_boot_enable\s*=\s*(yes|true|1)\s*$/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;
      $use_hard_links  = "Yes" if /^\s*use_hard_links\s*=\s*(yes|true|1)\s*$/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;
      $relink_src_link   = 'Yes' if /^\s*relink_src_link\s*=\s*(yes|true|1)\s*$/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";
    $have_conffile = "Yes";	# stop perl complaining
  }
}

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

$ENV{KERNEL_ARCH}=$kernel_arch if $kernel_arch;

# About to upgrade this package from version $2 TO THIS VERSION.
# "prerm upgrade" has already been called for the old version of
# this package.

sub find_initrd_tool {
  my $hostversion = shift;
  my $version = shift;
  my @ramdisks =
    grep {
      my $args = 
        "$_ " .
          "--supported-host-version=$hostversion " .
            "--supported-target-version=$version " .
              "1>/dev/null 2>&1"
                ;
      system($args) == 0;
    }
      split (/[:,\s]+/, $ramdisk);
}

sub check {
  my $version = shift;
  my $lib_modules="$modules_base/$version";
  my $message = '';

  if (-d "$lib_modules") {
    opendir(DIR, $lib_modules) || die "can’t opendir $lib_modules: $!";
    my @children = readdir(DIR);
    if ($#children > 1) {
      my @dirs  = grep { -d "$lib_modules/$_" } @children;
      if ($#dirs > 1) { # we have subdirs
        my $dir_message='';
        for my $dir (@dirs) {
          if ($dir =~/kernel$/) {
            $dir_message="An older install was detected.\n";
          }
          else {
            $dir_message="Module sub-directories were detected.\n"
              unless $dir_message;
          }
        }
        $message += $dir_message if $dir_message;
      }

      my @links = grep { -l "$lib_modules/$_" } @children;
      if ($#links > -1) {
        my $links_message = '';
        for my $link (@links) {
          next if ($link =~ /^build$/);
          next if ($link =~ /^source$/);
          $links_message = "Symbolic links were detected in $modules_base/$version.\n";
        }
        $message += $links_message if $links_message;
      }
      my @files = grep { -f "$lib_modules/$_" } @children;
      $message += "Additional files also exist in $modules_base/$version.\n"
        if ($#files > -1);
    }
  }
  else { $message .= "$lib_modules does not exist. ";}
  return $message;
}

if (-d "$modules_base/$version") {
  my $errors=check($version);
  warn "Info:\n$errors\n" if $errors;
}

# 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 "$preinst_hook") {
  &run_hook("preinst", $preinst_hook);
}
if (-d "/etc/kernel/preinst.d") {
  print STDERR "Examining /etc/kernel/preinst.d/\n";
  system ("run-parts --verbose --exit-on-error --arg=$version" .
          " --arg=$realimageloc$kimage-$version" .
          " /etc/kernel/preinst.d") &&
            die "Failed to process /etc/kernel/preinst.d";
}
if (-d "/etc/kernel/preinst.d/$version") {
  print STDERR "Examining /etc/kernel/preinst.d/$version.\n";
  system ("run-parts --verbose --exit-on-error --arg=$version" .
          " --arg=$realimageloc$kimage-$version" .
          " /etc/kernel/preinst.d/$version") &&
            die "Failed to process /etc/kernel/preinst.d/$version";
}
print STDERR "Done.\n";

exit 0;

__END__
Commit	Line	Data
356bd1e1 LO	1	#! /usr/bin/perl
	2	# -- Mode: Cperl --
	3	# image.preinst ---
	4	# Author : Manoj Srivastava ( srivasta@tiamat.datasync.com )
	5	# Created On : Sun Jun 14 03:38:02 1998
	6	# Created On Node : tiamat.datasync.com
	7	# Last Modified By : Manoj Srivastava
	8	# Last Modified On : Sun Sep 24 14:04:42 2006
	9	# Last Machine Used: glaurung.internal.golden-gryphon.com
	10	# Update Count : 99
	11	# Status : Unknown, Use with caution!
	12	# HISTORY :
	13	# Description :
	14	#
	15	#
	16
	17	#
	18	#use strict; #for debugging
	19
	20	use Debconf::Client::ConfModule qw(:all);
	21	version('2.0');
	22	my $capb=capb("backup");
	23
	24	$\|=1;
	25
	26	# Predefined values:
	27	my $version = "=V";
	28	my $link_in_boot = ""; # Should be empty, mostly
	29	my $no_symlink = ""; # Should be empty, mostly
	30	my $reverse_symlink = ""; # Should be empty, mostly
	31	my $do_symlink = "Yes"; # target machine defined
	32	my $do_boot_enable = "Yes"; # target machine defined
	33	my $do_bootfloppy = "Yes"; # target machine defined
	34	my $do_bootloader = "Yes"; # target machine defined
	35	my $move_image = ''; # target machine defined
	36	my $kimage = "=K"; # Should be empty, mostly
	37	my $loader = "=L"; # lilo, silo, quik, palo, vmelilo, nettrom
	38	# or elilo
	39	my $image_dir = "/boot"; # where the image is located
	40	my $initrd = "YES"; # initrd kernel
	41	my $use_hard_links = ''; # hardlinks do not wirk across fs boundaries
	42	my $postinst_hook = ''; #Normally we do not
	43	my $postrm_hook = ''; #Normally we do not
	44	my $preinst_hook = ''; #Normally we do not
	45	my $prerm_hook = ''; #Normally we do not
	46	my $minimal_swap = ''; # Do not swap symlinks
	47	my $ignore_depmod_err = ''; # normally we do not
	48	my $relink_src_link = 'YES'; # There is no harm in checking the link
	49	my $relink_build_link = 'YES'; # There is no harm in checking the link
	50	my $force_build_link = ''; # There is no harm in checking the link
	51	my $kernel_arch = "=B";
	52	my $ramdisk = "/usr/sbin/update-initramfs"; # List of tools to create initial ram fs.
	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	#known variables
68	my @boilerplate = ();
69	my @silotemplate = ();
70	my @quiktemplate = ();
71	my @palotemplate = ();
72	my @vmelilotemplate = ();
73	my $bootdevice = '';
74	my $rootdevice = '';
75	my $rootdisk = '';
76	my $rootpartition = '';
77	my $image_dest = "/";
78	my $realimageloc = "/$image_dir/";
79	my $have_conffile = "";
80	my $CONF_LOC = '/etc/kernel-img.conf';
81	my $relative_links = '';
82	my $silent_loader = '';
83	my $warn_reboot = ''; # Warn that we are installing a version of
84	# the kernel we are running
85
86	my $modules_base = '/lib/modules';
87
88	die "Pre inst Internal error. Aborting." unless $version;
89
90	exit 0 if $ARGV[0] =~ /abort-upgrade/;
91	exit 1 unless $ARGV[0] =~ /(install\|upgrade)/;
92
93	$arch = `uname -i`;
94	if ($arch =~ m/86/) {
95	system ("grep -q ' pae ' /proc/cpuinfo");
96	if ($?) {
97	print STDERR "This kernel does not support a non-PAE CPU.\n";
98	exit 1;
99	}
100	}
101
102	# remove multiple leading slashes; make sure there is at least one.
103	$realimageloc =~ s\|^/*\|/\|o;
104	$realimageloc =~ s\|/+\|/\|o;
105
106	if (-r "$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	$do_boot_enable = '' if /^\sdo_boot_enable\s=\s(no\|false\|0)\s$/ig;
120	$do_bootfloppy = '' if /^\sdo_bootfloppy\s=\s(no\|false\|0)\s$/ig;
121	$do_bootloader = '' if /^\sdo_bootloader\s=\s(no\|false\|0)\s$/ig;
122	$relative_links = '' if /^\srelative_links \s=\s(no\|false\|0)\s$/ig;
123	$use_hard_links = '' if /^\suse_hard_links\s=\s(no\|false\|0)\s$/ig;
124	$silent_loader = '' if /^\ssilent_loader\s=\s(no\|false\|0)\s$/ig;
125	$warn_reboot = '' if /^\swarn_reboot\s=\s(no\|false\|0)\s$/ig;
126	$minimal_swap = '' if /^\sminimal_swap\s=\s(no\|false\|0)\s$/ig;
127	$ignore_depmod_err = '' if /^\signore_depmod_err\s=\s(no\|false\|0)\s$/ig;
128	$relink_src_link = '' if /^\srelink_src_link\s=\s(no\|false\|0)\s$/ig;
129	$relink_build_link = '' if /^\srelink_build_link\s=\s(no\|false\|0)\s$/ig;
130	$force_build_link = '' if /^\sforce_build_link\s=\s(no\|false\|0)\s$/ig;
131
132	$do_symlink = "Yes" if /^\sdo_symlinks\s=\s(yes\|true\|1)\s$/ig;
133	$no_symlink = "Yes" if /^\sno_symlinks\s=\s(yes\|true\|1)\s$/ig;
134	$reverse_symlink = "Yes" if /^\sreverse_symlinks\s=\s(yes\|true\|1)\s$/ig;
135	$link_in_boot = "Yes" if /^\simage_in_boot\s=\s(yes\|true\|1)\s$/ig;
136	$link_in_boot = "Yes" if /^\slink_in_boot\s=\s(yes\|true\|1)\s$/ig;
137	$move_image = "Yes" if /^\smove_image\s=\s(yes\|true\|1)\s$/ig;
138	$do_boot_enable = "Yes" if /^\sdo_boot_enable\s=\s(yes\|true\|1)\s$/ig;
139	$do_bootfloppy = "Yes" if /^\sdo_bootfloppy\s=\s(yes\|true\|1)\s$/ig;
140	$do_bootloader = "Yes" if /^\sdo_bootloader\s=\s(yes\|true\|1)\s$/ig;
141	$relative_links = "Yes" if /^\srelative_links\s=\s(yes\|true\|1)\s$/ig;
142	$use_hard_links = "Yes" if /^\suse_hard_links\s=\s(yes\|true\|1)\s$/ig;
143	$silent_loader = 'Yes' if /^\ssilent_loader\s=\s(yes\|true\|1)\s$/ig;
144	$warn_reboot = 'Yes' if /^\swarn_reboot\s=\s(yes\|true\|1)\s$/ig;
145	$minimal_swap = 'Yes' if /^\sminimal_swap\s=\s(yes\|true\|1)\s$/ig;
146	$ignore_depmod_err = 'Yes' if /^\signore_depmod_err\s=\s(yes\|true\|1)\s$/ig;
147	$relink_src_link = 'Yes' if /^\srelink_src_link\s=\s(yes\|true\|1)\s$/ig;
148	$relink_build_link = 'Yes' if /^\srelink_build_link\s=\s(yes\|true\|1)\s$/ig;
149	$force_build_link = 'Yes' if /^\sforce_build_link\s=\s(yes\|true\|1)\s$/ig;
150
151	$image_dest = "$1" if /^\simage_dest\s=\s*(\S+)/ig;
152	$postinst_hook = "$1" if /^\spostinst_hook\s=\s*(\S+)/ig;
153	$postrm_hook = "$1" if /^\spostrm_hook\s=\s*(\S+)/ig;
154	$preinst_hook = "$1" if /^\spreinst_hook\s=\s*(\S+)/ig;
155	$prerm_hook = "$1" if /^\sprerm_hook\s=\s*(\S+)/ig;
156	$ramdisk = "$1" if /^\sramdisk\s=\s*(.+)$/ig;
157	}
158	close CONF;
159	$have_conffile = "Yes";
160	$have_conffile = "Yes"; # stop perl complaining
161	}
162	}
163
e1a4215d MHC	164	$initrd = '' if (! -x "$ramdisk");
e1a4215d MHC	165
356bd1e1 LO	166	$ENV{KERNEL_ARCH}=$kernel_arch if $kernel_arch;
	167
	168	# About to upgrade this package from version $2 TO THIS VERSION.
	169	# "prerm upgrade" has already been called for the old version of
	170	# this package.
	171
	172	sub find_initrd_tool {
	173	my $hostversion = shift;
	174	my $version = shift;
	175	my @ramdisks =
	176	grep {
	177	my $args =
	178	"$_ " .
	179	"--supported-host-version=$hostversion " .
	180	"--supported-target-version=$version " .
	181	"1>/dev/null 2>&1"
	182	;
	183	system($args) == 0;
	184	}
	185	split (/[:,\s]+/, $ramdisk);
	186	}
	187
	188	sub check {
	189	my $version = shift;
	190	my $lib_modules="$modules_base/$version";
	191	my $message = '';
	192
	193	if (-d "$lib_modules") {
	194	opendir(DIR, $lib_modules) \|\| die "can’t opendir $lib_modules: $!";
	195	my @children = readdir(DIR);
	196	if ($#children > 1) {
	197	my @dirs = grep { -d "$lib_modules/$_" } @children;
	198	if ($#dirs > 1) { # we have subdirs
	199	my $dir_message='';
	200	for my $dir (@dirs) {
	201	if ($dir =~/kernel$/) {
	202	$dir_message="An older install was detected.\n";
	203	}
	204	else {
	205	$dir_message="Module sub-directories were detected.\n"
	206	unless $dir_message;
	207	}
	208	}
	209	$message += $dir_message if $dir_message;
	210	}
	211
	212	my @links = grep { -l "$lib_modules/$_" } @children;
	213	if ($#links > -1) {
	214	my $links_message = '';
	215	for my $link (@links) {
	216	next if ($link =~ /^build$/);
	217	next if ($link =~ /^source$/);
	218	$links_message = "Symbolic links were detected in $modules_base/$version.\n";
	219	}
	220	$message += $links_message if $links_message;
	221	}
	222	my @files = grep { -f "$lib_modules/$_" } @children;
	223	$message += "Additional files also exist in $modules_base/$version.\n"
	224	if ($#files > -1);
	225	}
	226	}
	227	else { $message .= "$lib_modules does not exist. ";}
	228	return $message;
	229	}
230
231	if (-d "$modules_base/$version") {
232	my $errors=check($version);
233	warn "Info:\n$errors\n" if $errors;
234	}
235
236	# set the env var stem
237	$ENV{'STEM'} = "linux";
238
239	sub exec_script {
240	my $type = shift;
241	my $script = shift;
242	print STDERR "Running $type hook script $script.\n";
243	system ("$script $version $realimageloc$kimage-$version") &&
244	print STDERR "User $type hook script [$script] ";
245	if ($?) {
246	if ($? == -1) {
247	print STDERR "failed to execute: $!\n";
248	}
249	elsif ($? & 127) {
250	printf STDERR "died with signal %d, %s coredump\n",
251	($? & 127), ($? & 128) ? 'with' : 'without';
252	}
253	else {
254	printf STDERR "exited with value %d\n", $? >> 8;
255	}
256	exit $? >> 8;
257	}
258	}
259	sub run_hook {
260	my $type = shift;
261	my $script = shift;
262	if ($script =~ m,^/,) {
263	# Full path provided for the hook script
264	if (-x "$script") {
265	&exec_script($type,$script);
266	}
267	else {
268	die "The provided $type hook script [$script] could not be run.\n";
269	}
270	}
271	else {
272	# Look for it in a safe path
273	for my $path ('/bin', '/sbin', '/usr/bin', '/usr/sbin') {
274	if (-x "$path/$script") {
275	&exec_script($type, "$path/$script");
276	return 0;
277	}
278	}
279	# No luck
280	print STDERR "Could not find $type hook script [$script].\n";
281	die "Looked in: '/bin', '/sbin', '/usr/bin', '/usr/sbin'\n";
282	}
283	}
284
285
286	my $options;
287	for (@ARGV) {
288	s,','\\'',g;
289	$options .= " '$_'";
290	}
291	$ENV{'DEB_MAINT_PARAMS'}="$options";
292
293	## Run user hook script here, if any
294	if (-x "$preinst_hook") {
295	&run_hook("preinst", $preinst_hook);
296	}
297	if (-d "/etc/kernel/preinst.d") {
298	print STDERR "Examining /etc/kernel/preinst.d/\n";
299	system ("run-parts --verbose --exit-on-error --arg=$version" .
300	" --arg=$realimageloc$kimage-$version" .
301	" /etc/kernel/preinst.d") &&
302	die "Failed to process /etc/kernel/preinst.d";
303	}
304	if (-d "/etc/kernel/preinst.d/$version") {
305	print STDERR "Examining /etc/kernel/preinst.d/$version.\n";
306	system ("run-parts --verbose --exit-on-error --arg=$version" .
307	" --arg=$realimageloc$kimage-$version" .
308	" /etc/kernel/preinst.d/$version") &&
309	die "Failed to process /etc/kernel/preinst.d/$version";
310	}
311	print STDERR "Done.\n";
312
313	exit 0;
314
315	__END__
316
317