debian/control-scripts/headers-postinst

#!/usr/bin/perl
#                              -*- Mode: Cperl -*- 
# debian.postinst ---
# Author           : Manoj Srivastava ( srivasta@pilgrim.umass.edu )
# Created On       : Sat Apr 27 05:42:43 1996
# Created On Node  : melkor.pilgrim.umass.edu
# Last Modified By : Manoj Srivastava
# Last Modified On : Sat Aug  5 13:20:22 2006
# Last Machine Used: glaurung.internal.golden-gryphon.com
# Update Count     : 45
# Status           : Unknown, Use with caution!
# HISTORY          :
# Description      :
#
#
#
#  arch-tag: 1c716174-2f0a-476d-a626-a1322e62503a
#


$|=1;

# Predefined values:
my $version           = "=V";
my $kimage            = "=K";
my $package_name    = "linux-image-$version";


# Ignore all invocations uxcept when called on to configure.
exit 0 unless ($ARGV[0] && $ARGV[0] =~ /configure/);

#known variables
my $image_dest      = "/";
my $realimageloc    = "/boot/";
my $silent_modules  = '';
my $modules_base    = '/lib/modules';
my $CONF_LOC        = '/etc/kernel-img.conf';
# remove multiple leading slashes; make sure there is at least one.
$realimageloc  =~ s|^/*|/|o;
$realimageloc  =~ s|/+|/|o;

chdir '/usr/src' or die "Could not chdir to /usr/src:$!";

if (-r "$CONF_LOC" && -f "$CONF_LOC"  ) {
  if (open(CONF, "$CONF_LOC")) {
    while (<CONF>) {
      chomp;
      s/\#.*$//g;
      next if /^\s*$/;

      $header_postinst_hook   = "$1"  if /^\s*header_postinst_hook\s*=\s*(\S+)/ig;
    }
    close CONF;
  }
}

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";
  }
}

## Run user hook script here, if any
if (-x "$header_postinst_hook") {
  &run_hook("postinst", $header_postinst_hook);
}

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

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

exit 0;

__END__