| #! /usr/bin/perl |
| # -*- Mode: Cperl -*- |
| # debian.postinst --- |
| # Author : Manoj Srivastava ( srivasta@pilgrim.umass.edu ) |
| # Created On : Sat Apr 27 05:55:26 1996 |
| # Created On Node : melkor.pilgrim.umass.edu |
| # Last Modified By : Manoj Srivastava |
| # Last Modified On : Mon Apr 13 14:24:43 2009 |
| # Last Machine Used: anzu.internal.golden-gryphon.com |
| # Update Count : 362 |
| # Status : Unknown, Use with caution! |
| # HISTORY : |
| # Description : |
| # |
| # $Id: image.postinst,v 1.125 2003/10/07 16:24:20 srivasta Exp $ |
| # |
| |
| # |
| #use strict; #for debugging |
| use Cwd 'abs_path'; |
| use Debconf::Client::ConfModule qw(:all); |
| version('2.0'); |
| my $capb = capb("backup"); |
| |
| $| = 1; |
| |
| # Predefined values: |
| my $version = "=V"; |
| my $move_image = ''; # target machine defined |
| my $kimage = "=K"; # Should be empty, mostly |
| my $image_dir = "=D"; # where the image is located |
| my $clobber_modules = ''; # target machine defined |
| my $initrd = "=I"; # initrd kernel |
| 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 $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 $arch = "=A"; # should be same as dpkg --print-architecture |
| my $kernel_arch = "=B"; |
| my $package_name = "=ST-image-$version"; |
| my $kernel_pkg_version = "=KPV"; |
| |
| #known variables |
| my $image_dest = "/"; |
| my $realimageloc = "/$image_dir/"; |
| my $have_conffile = ""; |
| my $silent_modules = ''; |
| my $warn_reboot = 'Yes'; # Warn that we are installing a version of |
| # the kernel we are running |
| |
| my $modules_base = '/lib/modules'; |
| my $CONF_LOC = '/etc/kernel-img.conf'; |
| |
| # Ignore all invocations except when called on to configure. |
| exit 0 unless $ARGV[0] =~ /configure/; |
| |
| my $DEBUG = 0; |
| |
| # Do some preliminary sanity checks here to ensure we actually have an |
| # valid image dir |
| chdir('/') or die "could not chdir to /:$!\n"; |
| die "Internal Error: ($image_dir) is not a directory!\n" |
| unless -d $image_dir; |
| |
| # remove multiple leading slashes; make sure there is at least one. |
| $realimageloc =~ s|^/*|/|o; |
| $realimageloc =~ s|/+|/|o; |
| die "Internal Error: ($realimageloc) is not a directory!\n" |
| unless -d $realimageloc; |
| |
| if ( -r "$CONF_LOC" && -f "$CONF_LOC" ) { |
| if ( open( CONF, "$CONF_LOC" ) ) { |
| while (<CONF>) { |
| chomp; |
| s/\#.*$//g; |
| next if /^\s*$/; |
| |
| $move_image = "" if m/^\s*move_image\s*=\s*(no|false|0)\s*$/i; |
| $clobber_modules = '' if m/^\s*clobber_modules\s*=\s*(no|false|0)\s*$/i; |
| $silent_modules = '' if m/^\s*silent_modules\s*=\s*(no|false|0)\s*$/i; |
| $warn_reboot = '' if m/^\s*warn_reboot\s*=\s*(no|false|0)\s*$/i; |
| $ignore_depmod_err = '' |
| if m/^\s*ignore_depmod_err\s*=\s*(no|false|0)\s*$/i; |
| $relink_src_link = '' if m/^\s*relink_src_link\s*=\s*(no|false|0)\s*$/i; |
| $relink_build_link = '' |
| if m/^\s*relink_build_link\s*=\s*(no|false|0)\s*$/i; |
| $force_build_link = '' |
| if m/^\s*force_build_link\s*=\s*(no|false|0)\s*$/i; |
| |
| $move_image = "Yes" if m/^\s*move_image\s*=\s*(yes|true|1)\s*$/i; |
| $clobber_modules = "Yes" |
| if m/^\s*clobber_modules\s*=\s*(yes|true|1)\s*$/i; |
| $silent_modules = 'Yes' |
| if m/^\s*silent_modules\s*=\s*(yes|true|1)\s*$/i; |
| $warn_reboot = 'Yes' if m/^\s*warn_reboot\s*=\s*(yes|true|1)\s*$/i; |
| $ignore_depmod_err = 'Yes' |
| if m/^\s*ignore_depmod_err\s*=\s*(yes|true|1)\s*$/i; |
| $relink_src_link = 'Yes' |
| if m/^\s*relink_src_link\s*=\s*(yes|true|1)\s*$/i; |
| $relink_build_link = 'Yes' |
| if m/^\s*relink_build_link\s*=\s*(yes|true|1)\s*$/i; |
| $force_build_link = 'Yes' |
| if m/^\s*force_build_link\s*=\s*(yes|true|1)\s*$/i; |
| |
| $image_dest = "$1" if m/^\s*image_dest\s*=\s*(\S+)/i; |
| $postinst_hook = "$1" if m/^\s*postinst_hook\s*=\s*(\S+)/i; |
| $postrm_hook = "$1" if m/^\s*postrm_hook\s*=\s*(\S+)/i; |
| $preinst_hook = "$1" if m/^\s*preinst_hook\s*=\s*(\S+)/i; |
| $prerm_hook = "$1" if m/^\s*prerm_hook\s*=\s*(\S+)/i; |
| $mkimage = "$1" if m/^\s*mkimage\s*=\s*(.+)$/i; |
| $ramdisk = "$1" if m/^\s*ramdisk\s*=\s*(.+)$/i; |
| } ## end while (<CONF>) |
| close CONF; |
| $have_conffile = "Yes"; |
| } ## end if ( open( CONF, "$CONF_LOC"...)) |
| } ## end if ( -r "$CONF_LOC" &&...) |
| else { |
| if ( open( CONF, ">$CONF_LOC" ) ) { |
| print CONF "# Kernel Image management overrides\n"; |
| print CONF "# See kernel-img.conf(5) for details\n"; |
| if ( $loader =~ /palo/i ) { |
| print CONF "link_in_boot = Yes\n"; |
| print CONF "do_symlinks = Yes\n"; |
| print CONF "relative_links = Yes\n"; |
| } |
| else { |
| print CONF "do_symlinks = No\n"; |
| print CONF "do_bootloader = No\n"; |
| print CONF "do_initrd = Yes\n"; |
| print CONF "link_in_boot = No\n"; |
| |
| } ## end else [ if ( $loader =~ /palo/i)] |
| close CONF; |
| $have_conffile = "Yes"; |
| } ## end if ( open( CONF, ">$CONF_LOC"...)) |
| } ## end else [ if ( -r "$CONF_LOC" &&...)] |
| |
| # For some versions of kernel-package, we had this warning in the |
| # postinst, but the rules did not really interpolate the value in. |
| # Here is a sanity check. |
| my $pattern = "=" . "I"; |
| $initrd =~ s/^$pattern$//; |
| |
| # Tack on at least one trainling / |
| $image_dest = "$image_dest/"; |
| $image_dest =~ s|^/*|/|o; |
| $image_dest =~ s|/+$|/|o; |
| |
| if ( !-d "$image_dest" ) { |
| die |
| "Expected Image Destination dir ($image_dest) to be a valid directory!\n"; |
| } |
| |
| # most of our work is done in $image_dest (nominally /) |
| chdir("$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 ( $kimage =~ m/^b?zImage$/o ) { |
| $kimage = "vmlinuz"; |
| } # these produce vmlinuz |
| elsif ( $kimage =~ m/^[iI]mage$/o ) { my $nop = $kimage; } |
| elsif ( $kimage =~ m/^vmlinux$/o ) { my $nop = $kimage; } |
| elsif ( $kimage =~ m/^xen[0u]-linux$/o ) { |
| $package_name = "${kimage}-$version"; |
| } |
| elsif ( $kimage =~ m/^uImage$/o ) { my $nop = $kimage; } |
| else { $kimage = "vmlinuz" } # default |
| ### EDIT(aiy): Return Image for $kimage |
| $kimage = "Image"; |
| |
| $ENV{KERNEL_ARCH} = $kernel_arch if $kernel_arch; |
| |
| ### EDIT(aiy): Return $kimage instead of $kimage-$version |
| die "Internal Error: Could not find image (" |
| . $realimageloc |
| . "$kimage-$version)\n" |
| unless -e $realimageloc |
| . "$kimage"; |
| # . "$kimage-$version"; |
| |
| ###################################################################### |
| ## Fix the build link |
| ###################################################################### |
| sub fix_build_link { |
| return unless -d "$modules_base/$version"; |
| |
| # if we saved a build link in preinst, restore the link |
| if (!-e "$modules_base/$version/build" |
| && -l "$modules_base/$version/build.save" ) { |
| rename( "$modules_base/$version/build.save", |
| "$modules_base/$version/build" ) |
| || die "failed to move $modules_base/$version/build:$!"; |
| } ## end if ( !-e "$modules_base/$version/build"...) |
| if ( $relink_build_link || $force_build_link ) { |
| my $build_target; |
| my $real_target = ''; |
| if ( -l "$modules_base/$version/build" ) { |
| $build_target = readlink "$modules_base/$version/build"; |
| } |
| else { |
| return; |
| } |
| |
| # Determine what the real file name is, and test that for existence |
| $real_target = abs_path($build_target) if defined($build_target); |
| if ( !defined($build_target) || !-d "$real_target" ) { # Danglink link |
| warn qq( |
| Hmm. There is a symbolic link $modules_base/$version/build |
| However, I can not read it: $! |
| Therefore, I am deleting $modules_base/$version/build\n |
| ); |
| my $num = unlink "$modules_base/$version/build"; |
| if ( $num != 1 ) { |
| warn "error unlinking $modules_base/$version/build"; |
| } |
| else { |
| if ( $force_build_link || -d "/usr/src/=ST-headers-$version" ) { |
| my $result = symlink( "/usr/src/=ST-headers-$version", |
| "$modules_base/$version/build" ); |
| if ( !$result ) { |
| warn |
| "Could not link /usr/src/=ST-headers-$version to $modules_base/$version/build:$!"; |
| } |
| } ## end if ( $force_build_link...) |
| } ## end else [ if ( $num != 1 ) ] |
| } ## end if ( !defined($build_target...)) |
| } ## end if ( $relink_build_link...) |
| } ## end sub fix_build_link |
| |
| if ( $relink_build_link || $force_build_link ) { |
| &fix_build_link(); |
| } |
| ###################################################################### |
| ## Fix the source link |
| ###################################################################### |
| sub fix_source_link { |
| return unless -d "$modules_base/$version"; |
| if ($relink_src_link) { |
| my $source_target; |
| my $real_target = ''; |
| |
| if ( -l "$modules_base/$version/source" ) { |
| $source_target = readlink "$modules_base/$version/source"; |
| } |
| else { |
| return; |
| } |
| |
| # Determine what the real file name is, and test that for existence |
| $real_target = abs_path($source_target) if defined($source_target); |
| if ( !defined($source_target) || !-d "$real_target" ) { # Danglink link |
| warn qq( |
| Hmm. The package shipped with a symbolic link $modules_base/$version/source |
| However, I can not read the target: $! |
| Therefore, I am deleting $modules_base/$version/source\n |
| ); |
| my $num = unlink "$modules_base/$version/source"; |
| if ( $num != 1 ) { |
| warn "error unlinking $modules_base/$version/source"; |
| } |
| } ## end if ( !defined($source_target...)) |
| } ## end if ($relink_src_link) |
| } ## end sub fix_source_link |
| |
| if ($relink_src_link) { |
| &fix_source_link(); |
| } |
| ###################################################################### |
| ###################################################################### |
| ###################################################################### |
| ###################################################################### |
| |
| # We may not have any modules installed |
| if ( -d "$modules_base/$version" ) { |
| print STDERR "Running depmod.\n"; |
| my $ret = system("depmod -a -F $realimageloc/System.map-$version $version"); |
| my $exit_value = $? >> 8; |
| my $signal_num = $? & 127; |
| my $dumped_core = $? & 128; |
| if ($ret) { |
| if ( -f "$modules_base/$version/modules.dep" ) { |
| unlink "$modules_base/$version/modules.dep" unless $initrd; |
| } |
| my $seen; |
| my $answer; |
| my $question = "${package_name}/postinst/depmod-error-$version"; |
| if ($initrd) { |
| $question = "${package_name}/postinst/depmod-error-initrd-$version"; |
| } |
| ( $ret, $seen ) = fset( "$question", 'seen', 'false' ); |
| die "Error setting debconf flags in $question: $seen" if $ret; |
| |
| $ret = subst( "$question", 'modules_base', "$modules_base" ); |
| die "Error setting debconf substitutions in $question: $seen" if $ret; |
| |
| $ret = subst( "$question", 'SIGNAL', ", and got a signal $signal_num" ); |
| die "Error setting debconf substitutions in $question: $seen" if $ret; |
| |
| if ($dumped_core) { |
| $ret = subst( "$question", 'CORE', ", and dumped core" ); |
| die "Error setting debconf substitutions in $question: $seen" if $ret; |
| } |
| else { |
| $ret = subst( "$question", 'CORE', " " ); |
| die "Error setting debconf substitutions in $question: $seen" if $ret; |
| } |
| |
| ( $ret, $seen ) = input( 'medium', "$question" ); |
| if ( $ret && $ret != 30 ) { |
| die "Error setting debconf question $question: $seen"; |
| } |
| |
| ( $ret, $seen ) = go(); |
| if ( $ret && $ret != 30 ) { |
| die "Error asking debconf question $question: $seen"; |
| } |
| |
| ( $ret, $answer ) = get("$question"); |
| die "Error retreiving answer for $question: $answer" if $ret; |
| |
| if ( !$ignore_depmod_err ) { |
| if ( $answer =~ /^(y|t)/i ) { |
| exit(1); |
| } |
| else { |
| print STDERR "Ok, continuing as directed\n"; |
| } |
| } ## end if ( !$ignore_depmod_err) |
| } ## end if ($ret) |
| } ## end if ( -d "$modules_base/$version") |
| |
| # We used to have System.* files in / |
| if ( -e "/System.map" || -e "/System.old" ) { |
| my $ret; |
| my $answer; |
| my $question = "${package_name}/postinst/old-system-map-link-$version"; |
| |
| ( $ret, $answer ) = get("$question"); |
| die "Error retreiving answer for $question: $answer" if $ret; |
| |
| $answer =~ s/^\s+//; |
| $answer =~ s/\s+$//; |
| if ( $answer =~ /^(y|t)/i ) { |
| unlink '/System.map' if -e '/System.map'; |
| unlink '/System.old' if -e '/System.old'; |
| print STDERR "Obsolete links removed.\n"; |
| } |
| } ## end if ( -e "/System.map" ...) |
| |
| # set the env var stem |
| $ENV{'STEM'} = "=ST"; |
| |
| sub run_hook { |
| 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 $? >> 8; |
| } ## end if ($?) |
| } ## end sub run_hook |
| |
| # Set up the env variable containing our arguments |
| my $out; |
| for (@ARGV) { |
| s,','\\'',g; |
| $out .= " '$_'"; |
| } |
| $ENV{'DEB_MAINT_PARAMS'} = "$out"; |
| $ENV{'KERNEL_PACKAGE_VERSION'} = "$kernel_pkg_version"; |
| |
| if ( !$initrd ) { |
| $ENV{INITRD} = 'No'; |
| } |
| ## Run user hook script here, if any |
| if ( -d "/etc/kernel/postinst.d" ) { |
| print STDERR "Examining /etc/kernel/postinst.d.\n"; |
| system( "run-parts --verbose --exit-on-error --arg=$version " |
| . "--arg=$realimageloc$kimage-$version " |
| . "/etc/kernel/postinst.d" ) |
| && die "Failed to process /etc/kernel/postinst.d"; |
| } ## end if ( -d "/etc/kernel/postinst.d") |
| |
| if ( -d "/etc/kernel/postinst.d/$version" ) { |
| print STDERR "Examining /etc/kernel/postinst.d/$version.\n"; |
| system( "run-parts --verbose --exit-on-error --arg=$version " |
| . "--arg=$realimageloc$kimage-$version " |
| . "/etc/kernel/postinst.d/$version" ) |
| && die "Failed to process /etc/kernel/postinst.d/$version"; |
| } ## end if ( -d "/etc/kernel/postinst.d/$version") |
| |
| if ($postinst_hook) { |
| &run_hook( "postinst", $postinst_hook ); |
| } |
| |
| # creating some info about kernel and initrd |
| if ($DEBUG) { |
| my $ksize = sprintf( "%.0f", |
| ( stat( $realimageloc . "$kimage-$version" ) )[7] / 1024 ) |
| . "kB"; |
| my $initrdsize = ''; |
| if ($initrd) { |
| $initrdsize = sprintf( "%.0f", |
| ( stat( $realimageloc . "initrd.img-$version" ) )[7] / 1024 ) |
| . "kB"; |
| } |
| |
| print STDERR <<"EOMSG"; |
| A new kernel image has been installed at $realimageloc$kimage-$version |
| (Size: $ksize) |
| |
| Symbolic links, unless otherwise specified, can be found in $image_dest |
| |
| EOMSG |
| |
| if ($initrd) { |
| print STDERR <<"EOMSGA"; |
| |
| Initial rootdisk image: ${realimageloc}initrd.img-$version (Size: $initrdsize) |
| EOMSGA |
| } ## end if ($initrd) |
| } ## end if ($DEBUG) |
| |
| exit 0; |
| |
| __END__ |