216 lines
7.0 KiB
Perl
Executable File
216 lines
7.0 KiB
Perl
Executable File
#! /usr/bin/perl
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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 $do_symlink = "Yes"; # target machine defined
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my $kimage = "=K"; # Should be empty, mostly
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my $image_dir = "=D"; # where the image is located
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my $use_hard_links = ''; # hardlinks do not wirk across fs boundaries
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my $preinst_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 $arch = "=A"; # should be same as dpkg --print-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 $package_name = "=ST-image-$version";
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#known variables
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my $image_dest = "/";
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my $realimageloc = "/$image_dir/";
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my $CONF_LOC = '/etc/kernel-img.conf';
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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 $ARGV[0] =~ /(install|upgrade)/;
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# remove multiple leading slashes; make sure there is at least one.
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$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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$link_in_boot = "" if /link_in_boot\s*=\s*(no|false|0)\s*$/ig;
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$use_hard_links = '' if /use_hard_links\s*=\s*(no|false|0)\s*$/ig;
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$minimal_swap = '' if /minimal_swap\s*=\s*(no|false|0)\s*$/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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$link_in_boot = "Yes" if /link_in_boot\s*=\s*(yes|true|1)\s*$/ig;
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$use_hard_links = "Yes" if /use_hard_links\s*=\s*(yes|true|1)\s*$/ig;
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$minimal_swap = 'Yes' if /minimal_swap\s*=\s*(yes|true|1)\s*$/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 = "$1" if /image_dest\s*=\s*(\S+)/ig;
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$preinst_hook = "$1" if /preinst_hook\s*=\s*(\S+)/ig;
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$ramdisk = "$1" if /ramdisk\s*=\s*(.+)$/ig;
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}
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close CONF;
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}
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}
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$ENV{KERNEL_ARCH}=$kernel_arch if $kernel_arch;
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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 $errors;
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}
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if (-d "$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:$!";
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}
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# set the env var stem
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$ENV{'STEM'} = "=ST";
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sub exec_script {
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my $type = shift;
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my $script = shift;
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print STDERR "Running $type hook script $script.\n";
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system ("$script $version $realimageloc$kimage-$version") &&
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print STDERR "User $type hook script [$script] ";
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if ($?) {
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if ($? == -1) {
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print STDERR "failed to execute: $!\n";
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}
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elsif ($? & 127) {
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printf STDERR "died with signal %d, %s coredump\n",
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($? & 127), ($? & 128) ? 'with' : 'without';
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}
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else {
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printf STDERR "exited with value %d\n", $? >> 8;
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}
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exit $? >> 8;
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}
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}
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sub run_hook {
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my $type = shift;
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my $script = shift;
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if ($script =~ m,^/,) {
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# Full path provided for the hook script
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if (-x "$script") {
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&exec_script($type,$script);
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}
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else {
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die "The provided $type hook script [$script] could not be run.\n";
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}
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}
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else {
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# Look for it in a safe path
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for my $path ('/bin', '/sbin', '/usr/bin', '/usr/sbin') {
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if (-x "$path/$script") {
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&exec_script($type, "$path/$script");
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return 0;
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}
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}
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# No luck
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print STDERR "Could not find $type hook script [$script].\n";
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die "Looked in: '/bin', '/sbin', '/usr/bin', '/usr/sbin'\n";
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}
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}
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my $options;
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for (@ARGV) {
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s,','\\'',g;
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$options .= " '$_'";
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}
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$ENV{'DEB_MAINT_PARAMS'}="$options";
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## Run user hook script here, if any
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if (-x "$preinst_hook") {
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&run_hook("preinst", $preinst_hook);
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}
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if (-d "/etc/kernel/preinst.d") {
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print STDERR "Examining /etc/kernel/preinst.d/\n";
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system ("run-parts --verbose --exit-on-error --arg=$version" .
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" --arg=$realimageloc$kimage-$version" .
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" /etc/kernel/preinst.d") &&
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die "Failed to process /etc/kernel/preinst.d";
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}
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if (-d "/etc/kernel/preinst.d/$version") {
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print STDERR "Examining /etc/kernel/preinst.d/$version.\n";
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system ("run-parts --verbose --exit-on-error --arg=$version" .
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" --arg=$realimageloc$kimage-$version" .
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" /etc/kernel/preinst.d/$version") &&
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die "Failed to process /etc/kernel/preinst.d/$version";
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}
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exit 0;
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__END__
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