550 lines
19 KiB
Perl
Executable File
550 lines
19 KiB
Perl
Executable File
#! /usr/bin/perl
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# -*- Mode: Cperl -*-
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# image.preinst ---
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# Author : Manoj Srivastava ( srivasta@tiamat.datasync.com )
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# Created On : Sun Jun 14 03:38:02 1998
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# Created On Node : tiamat.datasync.com
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# Last Modified By : Manoj Srivastava
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# Last Modified On : Sun Sep 24 14:04:42 2006
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# Last Machine Used: glaurung.internal.golden-gryphon.com
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# Update Count : 99
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# Status : Unknown, Use with caution!
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# HISTORY :
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# Description :
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#
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#
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#
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#use strict; #for debugging
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use Debconf::Client::ConfModule qw(:all);
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version('2.0');
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my $capb=capb("backup");
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$|=1;
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# Predefined values:
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my $version = "=V";
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my $link_in_boot = "=IB"; # Should be empty, mostly
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my $no_symlink = "=S"; # Should be empty, mostly
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my $reverse_symlink = "=R"; # Should be empty, mostly
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my $do_symlink = "Yes"; # target machine defined
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my $do_boot_enable = "Yes"; # target machine defined
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my $do_bootfloppy = "Yes"; # target machine defined
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my $do_bootloader = "Yes"; # target machine defined
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my $move_image = ''; # target machine defined
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my $mkimage = "=M"; # command to generate the initrd image
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my $do_initrd = ''; # target machine defined
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my $warn_initrd = 'YES'; # target machine defined
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my $kimage = "=K"; # Should be empty, mostly
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my $loader = "=L"; # lilo, silo, quik, palo, vmelilo, nettrom
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# or elilo
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my $image_dir = "=D"; # where the image is located
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my $clobber_modules = ''; # target machine defined
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my $initrd = "=I"; # initrd kernel
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my $use_hard_links = ''; # hardlinks do not wirk across fs boundaries
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my $postinst_hook = ''; #Normally we do not
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my $postrm_hook = ''; #Normally we do not
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my $preinst_hook = ''; #Normally we do not
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my $prerm_hook = ''; #Normally we do not
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my $minimal_swap = ''; # Do not swap symlinks
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my $ignore_depmod_err = ''; # normally we do not
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my $relink_src_link = 'YES'; # There is no harm in checking the link
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my $relink_build_link = 'YES'; # There is no harm in checking the link
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my $force_build_link = ''; # There is no harm in checking the link
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my $official_image = "=OF"; # only true for official images
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my $arch = "=A"; # should be same as dpkg --print-installation-architecture
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my $kernel_arch = "=B";
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my $ramdisk = "=MK"; # List of tools to create initial ram fs.
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my $initrddep = "=MD"; # List of dependencies for such tools
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my $package_name = "=ST-image-$version";
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my $Loader = "NoLOADER"; #
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$Loader = "LILO" if $loader =~ /^lilo/io;
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$Loader = "SILO" if $loader =~ /^silo/io;
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$Loader = "QUIK" if $loader =~ /^quik/io;
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$Loader = "yaboot" if $loader =~ /^yaboot/io;
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$Loader = "PALO" if $loader =~ /^palo/io;
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$Loader = "NETTROM" if $loader =~ /^nettrom/io;
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$Loader = "VMELILO" if $loader =~ /^vmelilo/io;
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$Loader = "ZIPL" if $loader =~ /^zipl/io;
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$Loader = "ELILO" if $loader =~ /^elilo/io;
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#known variables
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my @boilerplate = ();
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my @silotemplate = ();
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my @quiktemplate = ();
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my @palotemplate = ();
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my @vmelilotemplate = ();
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my $bootdevice = '';
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my $rootdevice = '';
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my $rootdisk = '';
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my $rootpartition = '';
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my $image_dest = "/";
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my $realimageloc = "/$image_dir/";
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my $have_conffile = "";
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my $CONF_LOC = '/etc/kernel-img.conf';
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my $relative_links = '';
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my $silent_modules = '';
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my $silent_loader = '';
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my $modules_base = '/lib/modules';
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die "Pre inst Internal error. Aborting." unless $version;
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exit 0 if $ARGV[0] =~ /abort-upgrade/;
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exit 1 unless $ARGV[0] =~ /(install|upgrade)/;
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# Official images may silently upgrade
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if ($official_image =~ /^\s*YES\s*$/o && ($ARGV[0] =~ /upgrade/)) {
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$silent_modules = 'Yes';
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}
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# remove multiple leading slashes; make sure there is at least one.
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$realimageloc =~ s|^/*|/|o;
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$realimageloc =~ s|/+|/|o;
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if (-r "$CONF_LOC" && -f "$CONF_LOC" ) {
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if (open(CONF, "$CONF_LOC")) {
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while (<CONF>) {
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chomp;
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s/\#.*$//g;
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next if /^\s*$/;
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$do_symlink = "" if /do_symlinks\s*=\s*(no|false|0)\s*$/ig;
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$no_symlink = "" if /no_symlinks\s*=\s*(no|false|0)\s*$/ig;
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$reverse_symlink = "" if /reverse_symlinks\s*=\s*(no|false|0)\s*$/ig;
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$link_in_boot = "" if /link_in_boot\s*=\s*(no|false|0)\s*$/ig;
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$move_image = "" if /move_image\s*=\s*(no|false|0)\s*$/ig;
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$clobber_modules = '' if /clobber_modules\s*=\s*(no|false|0)\s*$/ig;
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$do_boot_enable = '' if /do_boot_enable\s*=\s*(no|false|0)\s*$/ig;
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$do_bootfloppy = '' if /do_bootfloppy\s*=\s*(no|false|0)\s*$/ig;
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$do_bootloader = '' if /do_bootloader\s*=\s*(no|false|0)\s*$/ig;
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$do_initrd = '' if /do_initrd\s*=\s*(no|false|0)\s*$/ig;
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$warn_initrd = '' if /warn_initrd\s*=\s*(no|false|0)\s*$/ig;
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$relative_links = '' if /relative_links \s*=\s*(no|false|0)\s*$/ig;
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$use_hard_links = '' if /use_hard_links\s*=\s*(no|false|0)\s*$/ig;
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$silent_modules = '' if /silent_modules\s*=\s*(no|false|0)\s*$/ig;
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$silent_loader = '' if /silent_loader\s*=\s*(no|false|0)\s*$/ig;
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$minimal_swap = '' if /minimal_swap\s*=\s*(no|false|0)\s*$/ig;
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$ignore_depmod_err = '' if /ignore_depmod_err\s*=\s*(no|false|0)\s*$/ig;
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$relink_src_link = '' if /relink_src_link\s*=\s*(no|false|0)\s*$/ig;
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$relink_build_link = '' if /relink_build_link\s*=\s*(no|false|0)\s*$/ig;
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$force_build_link = '' if /force_build_link\s*=\s*(no|false|0)\s*$/ig;
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$do_symlink = "Yes" if /do_symlinks\s*=\s*(yes|true|1)\s*$/ig;
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$no_symlink = "Yes" if /no_symlinks\s*=\s*(yes|true|1)\s*$/ig;
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$reverse_symlink = "Yes" if /reverse_symlinks\s*=\s*(yes|true|1)\s*$/ig;
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$link_in_boot = "Yes" if /link_in_boot\s*=\s*(yes|true|1)\s*$/ig;
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$move_image = "Yes" if /move_image\s*=\s*(yes|true|1)\s*$/ig;
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$clobber_modules = "Yes" if /clobber_modules\s*=\s*(yes|true|1)\s*$/ig;
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$do_boot_enable = "Yes" if /do_boot_enable\s*=\s*(yes|true|1)\s*$/ig;
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$do_bootfloppy = "Yes" if /do_bootfloppy\s*=\s*(yes|true|1)\s*$/ig;
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$do_bootloader = "Yes" if /do_bootloader\s*=\s*(yes|true|1)\s*$/ig;
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$relative_links = "Yes" if /relative_links\s*=\s*(yes|true|1)\s*$/ig;
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$do_initrd = "Yes" if /do_initrd\s*=\s*(yes|true|1)\s*$/ig;
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$warn_initrd = "Yes" if /warn_initrd\s*=\s*(yes|true|1)\s*$/ig;
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$use_hard_links = "Yes" if /use_hard_links\s*=\s*(yes|true|1)\s*$/ig;
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$silent_modules = 'Yes' if /silent_modules\s*=\s*(yes|true|1)\s*$/ig;
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$silent_loader = 'Yes' if /silent_loader\s*=\s*(yes|true|1)\s*$/ig;
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$minimal_swap = 'Yes' if /minimal_swap\s*=\s*(yes|true|1)\s*$/ig;
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$ignore_depmod_err = 'Yes' if /ignore_depmod_err\s*=\s*(yes|true|1)\s*$/ig;
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$relink_src_link = 'Yes' if /relink_src_link\s*=\s*(yes|true|1)\s*$/ig;
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$relink_build_link = 'Yes' if /relink_build_link\s*=\s*(yes|true|1)\s*$/ig;
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$force_build_link = 'Yes' if /force_build_link\s*=\s*(yes|true|1)\s*$/ig;
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$image_dest = "$1" if /image_dest\s*=\s*(\S+)/ig;
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$postinst_hook = "$1" if /postinst_hook\s*=\s*(\S+)/ig;
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$postrm_hook = "$1" if /postrm_hook\s*=\s*(\S+)/ig;
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$preinst_hook = "$1" if /preinst_hook\s*=\s*(\S+)/ig;
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$prerm_hook = "$1" if /prerm_hook\s*=\s*(\S+)/ig;
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$mkimage = "$1" if /mkimage\s*=\s*(.+)$/ig;
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$ramdisk = "$1" if /ramdisk\s*=\s*(.+)$/ig;
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}
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close CONF;
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$have_conffile = "Yes";
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$have_conffile = "Yes"; # stop perl complaining
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}
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}
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if ($do_initrd) { $warn_initrd = ''; }
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if (!$warn_initrd) { $do_initrd = "YES";}
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$ENV{KERNEL_ARCH}=$kernel_arch if $kernel_arch;
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# About to upgrade this package from version $2 TO THIS VERSION.
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# "prerm upgrade" has already been called for the old version of
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# this package.
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sub find_inird_tool {
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my $hostversion = shift;
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my $version = shift;
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my @ramdisks =
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grep {
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my $args =
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"$_ " .
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"--supported-host-version=$hostversion " .
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"--supported-target-version=$version " .
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"1>/dev/null 2>&1"
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;
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system($args) == 0;
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}
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split (/[:,\s]+/, $ramdisk);
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}
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# For some versions of kernel-package, we had this warning in the
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# postinst, but the rules did not really interpolate the value in.
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# Here is a sanity check.
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my $pattern = "=" . "I";
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$initrd=~ s/^$pattern$//;
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if ($initrd) {
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chomp (my $hostversion = `uname -r`);
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my @ramdisklist;
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@ramdisklist = find_inird_tool($hostversion, $version, $ramdisk) if $ramdisk;
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if ($#ramdisklist < 0) {
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my $ret;
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my $seen;
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my $text = "${package_name}/preinst/initrd-$version";
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($ret,$seen) = fset ("$text", 'seen', 'false');
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die "Error setting debconf flags in $text: $seen" if $ret;
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($ret,$seen) = subst("$text", 'hostversion', "$hostversion");
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die "Error setting debconf substitutions in $text: $seen" if $ret;
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($ret,$seen) = subst("$text", 'ramdisk', "$ramdisk");
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die "Error setting debconf substitutions in $text: $seen" if $ret;
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($ret,$seen) = subst("$text", 'initrddep', "$initrddep");
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die "Error setting debconf substitutions in $text: $seen" if $ret;
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($ret,$seen) = input('medium', "$text");
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if ($ret && $ret != 30 ) {
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die "Error setting debconf question $text: $seen";
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}
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($ret,$seen) = go ();
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if ($ret && $ret != 30 ) {
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die "Error asking debconf question $text: $seen";
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}
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# I no longer claim this question
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($ret,$seen) = unregister("$text");
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die "Error unregistering debconf question $text: $seen" if $ret;
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warn "Could not find $ramdisk.";
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}
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}
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if ($initrd && !$do_initrd) {
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my $ret;
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my $seen;
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my $answer;
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my $invisible = 0;
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my $question = "${package_name}/preinst/bootloader-initrd-$version";
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if ($loader =~ m/^lilo/i) {
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$question = "${package_name}/preinst/lilo-initrd-$version";
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}
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elsif ($loader =~ m/^elilo/i) {
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$question = "${package_name}/preinst/elilo-initrd-$version";
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}
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($ret,$seen) = fset ("$question", 'seen', 'false');
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die "Error setting debconf flags in $question: $seen" if $ret;
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($ret,$seen) = input('critical', "$question");
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if ($ret && $ret != 30 ) {
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die "Error setting debconf question $question: $seen";
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}
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$invisible = $ret if $ret == 30;
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($ret,$seen) = go ();
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if ($ret && $ret != 30 ) {
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die "Error asking debconf question $question: $seen";
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}
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($ret,$answer) = get("$question");
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die "Error retreiving answer for $question: $answer" if $ret;
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my $note = "${package_name}/preinst/lilo-has-ramdisk";
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if (-f "/etc/lilo.conf"){
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my $ramdisk_found = 0;
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open (CONF, "/etc/lilo.conf") or warn "Can't open /etc/lilo.conf: $!";
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while (<CONF>) {
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chomp;
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if (m/^(\s*ramdisk\s*=\s*0)/g) {
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my $line = $1;
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($ret,$seen) = fset ("$note", 'seen', 'false');
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die "Error setting debconf flags in $note: $seen" if $ret;
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$ret = subst("$note", 'LINE', "$line");
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die "Error setting debconf substitutions in $note: $seen" if $ret;
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($ret,$seen) = input('medium', "$note");
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if ($ret && $ret != 30 ) {
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die "Error setting debconf note $note: $seen";
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}
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($ret,$seen) = go ();
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if ($ret && $ret != 30 ) {
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die "Error asking debconf question $note: $seen";
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}
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last;
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}
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}
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close CONF;
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}
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$answer =~ s/^\s+//;
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$answer =~ s/\s+$//;
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print STDERR "Ok, Aborting, since the bootloader might not handle " .
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"an initrd/initramfs image.\n" unless $answer =~ /^(f|n)/i;
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if ($answer !~ /^(f|n)/i && $invisible) {
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my $note = "${package_name}/preinst/abort-install-$version";
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($ret,$seen) = fset ("$note", 'seen', 'false');
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die "Error setting debconf flags in $note: $seen" if $ret;
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($ret,$seen) = fset ("$note", 'seen', 'false');
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die "Error setting debconf flags in $note: $seen" if $ret;
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($ret,$seen) = input('critical', "$note");
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if ($ret && $ret != 30 ) {
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die "Error setting debconf note $note: $seen";
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}
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($ret,$seen) = go ();
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if ($ret && $ret != 30 ) {
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die "Error asking debconf question $note: $seen";
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}
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}
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exit 1 unless $answer =~ /^(f|n)/i;
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}
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sub check {
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my $version = shift;
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my $lib_modules="$modules_base/$version";
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my $message = '';
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if (-d "$lib_modules") {
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opendir(DIR, $lib_modules) || die "can’t opendir $lib_modules: $!";
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my @children = readdir(DIR);
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if ($#children > 1) {
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my @dirs = grep { -d "$lib_modules/$_" } @children;
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if ($#dirs > 1) { # we have subdirs
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my $dir_message='';
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for my $dir (@dirs) {
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if ($dir =~/kernel$/) {
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$dir_message="An older install was detected.\n";
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}
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else {
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$dir_message="Module sub-directories were detected.\n"
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unless $dir_message;
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}
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}
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$message += $dir_message if $dir_message;
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}
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my @links = grep { -l "$lib_modules/$_" } @children;
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if ($#links > -1) {
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my $links_message = '';
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for my $link (@links) {
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next if ($link =~ /^build$/);
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next if ($link =~ /^source$/);
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$links_message = "Symbolic links were detected in $modules_base/$version.\n";
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}
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$message += $links_message if $links_message;
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}
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my @files = grep { -f "$lib_modules/$_" } @children;
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$message += "Additional files also exist in $modules_base/$version.\n"
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if ($#files > -1);
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}
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}
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else { $message .= "$lib_modules does not exist. ";}
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return $message;
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}
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if (-d "$modules_base/$version") {
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my $errors=check($version);
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warn "Info:\n$errors\n" if $errors;
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}
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# If this is an official image, and only a build symlink exists, allow
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# it to be clobbered.
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if ($official_image =~ /^\s*YES\s*$/o ) {
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if (-d "$modules_base/$version" && -l "$modules_base/$version/build" ) {
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rename("$modules_base/$version/build", "$modules_base/$version/build.save") ||
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die "failed to move $modules_base/$version/build:$!";
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}
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}
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if (-d "$modules_base/$version/kernel") {
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if ($clobber_modules) {
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my $ret =
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system("mv $modules_base/$version/kernel $modules_base/${version}_kernel_$$");
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my $seen;
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if ($ret) {
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my $note = "${package_name}/preinst/failed-to-move-modules-$version";
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($ret,$seen) = fset ("$note", 'seen', 'false');
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die "Error setting debconf flags in $note: $seen" if $ret;
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($ret,$seen) = fset ("$note", 'seen', 'false');
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die "Error setting debconf flags in $note: $seen" if $ret;
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$ret = subst("$note", 'modules_base', "$modules_base");
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die "Error setting debconf substitutions in $note: $seen" if $ret;
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$ret = subst("$note", 'dest', "${version}/kernel_$$");
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die "Error setting debconf substitutions in $note: $seen" if $ret;
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($ret,$seen) = input('critical', "$note");
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if ($ret && $ret != 30 ) {
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die "Error setting debconf note $note: $seen";
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}
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($ret,$seen) = go ();
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if ($ret && $ret != 30 ) {
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die "Error asking debconf question $note: $seen";
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}
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exit 1;
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}
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}
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elsif ($silent_modules !~ m/YES/i) {
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my $ret;
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my $seen;
|
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my $answer;
|
||
my $question = "${package_name}/preinst/overwriting-modules-$version";
|
||
|
||
($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", 'package', "$package_name");
|
||
die "Error setting debconf substitutions in $question: $seen" if $ret;
|
||
|
||
($ret,$seen) = input('critical', "$question");
|
||
if ($ret && $ret != 30 ) {
|
||
die "Error setting debconf question $question: $seen";
|
||
}
|
||
$invisible = $ret if $ret == 30;
|
||
|
||
($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;
|
||
|
||
$answer =~ s/^\s+//;
|
||
$answer =~ s/\s+$//;
|
||
print STDERR "Ok, aborting, since modules for this image already exist.\n"
|
||
unless $answer =~ /^(f|n)/i;
|
||
if ($answer !~ /^(f|n)/i && $invisible) {
|
||
my $note = "${package_name}/preinst/abort-overwrite-$version";
|
||
|
||
($ret,$seen) = fset ("$note", 'seen', 'false');
|
||
die "Error setting debconf flags in $note: $seen" if $ret;
|
||
|
||
($ret,$seen) = fset ("$note", 'seen', 'false');
|
||
die "Error setting debconf flags in $note: $seen" if $ret;
|
||
|
||
($ret,$seen) = input('critical', "$note");
|
||
if ($ret && $ret != 30 ) {
|
||
die "Error setting debconf note $note: $seen";
|
||
}
|
||
|
||
($ret,$seen) = go ();
|
||
if ($ret && $ret != 30 ) {
|
||
die "Error asking debconf question $note: $seen";
|
||
}
|
||
}
|
||
exit 1 unless $answer =~ /^(f|n)/i;
|
||
}
|
||
else {
|
||
print STDERR <<EOF;
|
||
The directory $modules_base/$version still exists. Continuing as directed.
|
||
EOF
|
||
;
|
||
}
|
||
}
|
||
|
||
# set the env var stem
|
||
$ENV{'STEM'} = "=ST";
|
||
|
||
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 "$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__
|
||
|
||
|