Code: Alles auswählen
#!/usr/bin/perl
# Copyright 2009-2010 Ben Hutchings
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
use strict;
use warnings;
use Debconf::Client::ConfModule ':all';
use FileHandle;
use POSIX ();
use UUID;
package DebianKernel::DiskId;
### utility
sub id_to_path {
my ($id) = @_;
$id =~ m|^/|
or $id =~ s{^(LABEL|UUID)=}{'/dev/disk/by-' . lc($1) . '/'}e
or die "Could not map id $id to path";
return $id;
}
### /etc/fstab
sub fstab_next {
# Based on my_getmntent() in mount_mntent.c
my ($file) = @_;
my $text = <$file>;
unless (defined($text)) {
return ();
}
my $line = $text;
$line =~ s/\r?\n$//;
$line =~ s/^[ \t]*//;
if ($line =~ /^(#|$)/) {
return ($text);
} else {
return ($text,
map({ s/\\([0-7][0-7][0-7])/chr(oct($1) & 0xff)/eg; $_; }
split(/[ \t]+/, $line)));
}
}
sub fstab_list {
my ($file) = @_;
my @bdevs;
while (1) {
my ($text, $bdev) = fstab_next($file);
last unless defined($text);
if (defined($bdev)) {
push @bdevs, $bdev;
}
}
return @bdevs;
}
sub fstab_update {
my ($old, $new, $map) = @_;
while (1) {
my ($text, $bdev) = fstab_next($old);
last unless defined($text);
if (defined($bdev) && defined(my $id = $map->{$bdev})) {
$text =~ s/^(\s*\S+)(.*)/# $1$2\n$id$2/;
}
$new->print("$text");
}
}
### Kernel parameters
sub kernel_list {
my ($cmd_line) = @_;
return ($cmd_line =~ /\broot=(\S+)/) ? ($1) : ();
}
sub kernel_update {
my ($cmd_line, $map) = @_;
if ($cmd_line =~ /\broot=(\S+)/ && defined(my $id = $map->{$1})) {
$cmd_line =~ s/\broot=(\S+)/root=$id/;
return $cmd_line;
} else {
return undef;
}
}
### shell script variable assignment
# Maintains enough context to find statement boundaries, and can parse
# variable definitions that do not include substitutions. I think.
sub shellvars_next {
my ($file) = @_;
my $text = '';
my @context = ('');
my $first = 1;
my $in_value = 0;
my ($name, $value);
my $unhandled = 0;
LINE:
while (<$file>) {
$text .= $_;
# variable assignment
if ($first && m/^\s*([A-Za-z_][A-Za-z0-9_]*)=/g) {
$name = $1;
$value = '';
$in_value = 1;
}
while (/\G(.*?)([#`'"(){}\s]|\\.|\$[({]?)/gs) {
my $end_pos = pos;
my $special = $2;
if ($in_value) {
# add non-special characters to the value verbatim
$value .= $1;
}
if ($context[$#context] eq '') {
# space outside quotes or brackets ends the value
if ($special =~ /^\s/) {
$in_value = 0;
if ($special eq "\n") {
last LINE;
}
}
# something else after the value means this is a command
# with an environment override, not a variable definition
elsif (defined($name) && !$in_value) {
$unhandled = 1;
}
}
# in single-quoted string
if ($context[$#context] eq "'") {
# only the terminating single-quote is special
if ($special eq "'") {
pop @context;
} else {
$value .= $special;
}
}
# backslash escape
elsif ($special =~ /^\\/) {
if ($in_value && $special ne "\\\n") {
$value .= substr($special, 1, 1);
}
}
# in backtick substitution
elsif ($context[$#context] eq '`') {
# backtick does not participate in nesting, so only the
# terminating backtick should be considered special
if ($special eq '`') {
pop @context;
}
}
# comment
elsif ($context[$#context] !~ /^['"]/ && $special eq '#') {
# ignore rest of the physical line, except the new-line
pos = $end_pos;
/\G.*/g;
next;
}
# start of backtick substitution
elsif ($special eq '`') {
push @context, '`';
$unhandled = 1;
}
# start of single/double-quoted string
elsif ($special =~ /^['"]/ && $context[$#context] !~ /^['"]/) {
push @context, $special;
}
# end of double-quoted string
elsif ($special eq '"' && $context[$#context] eq '"') {
pop @context;
}
# open bracket
elsif ($special =~ /^\$?\(/) {
push @context, ')';
$unhandled = 1;
} elsif ($special =~ /^\$\{/) {
push @context, '}';
$unhandled = 1;
}
# close bracket
elsif ($special =~ /^[)}]/ && $special eq $context[$#context]) {
pop @context;
}
# variable substitution
elsif ($special eq '$') {
$unhandled = 1;
}
# not a special character in this context (or a syntax error)
else {
if ($in_value) {
$value .= $special;
}
}
pos = $end_pos;
}
$first = 0;
}
if ($text eq '') {
return ();
} elsif ($unhandled) {
return ($text);
} else {
return ($text, $name, $value);
}
}
sub shellvars_quote {
my ($value) = @_;
$value =~ s/'/'\''/g;
return "'$value'";
}
### GRUB 1 (grub-legacy) config
sub grub1_path {
for ('/boot/grub', '/boot/boot/grub') {
if (-d) {
return "$_/menu.lst";
}
}
return undef;
}
sub grub1_parse {
my ($file) = @_;
my @results = ();
my $text = '';
my $in_auto = 0;
my $in_opts = 0;
while (<$file>) {
if ($in_opts && /^\# (\w+)=(.*)/) {
push @results, [$text];
$text = '';
push @results, [$_, $1, $2];
} else {
$text .= $_;
if ($_ eq "### BEGIN AUTOMAGIC KERNELS LIST\n") {
$in_auto = 1;
} elsif ($_ eq "### END DEBIAN AUTOMAGIC KERNELS LIST\n") {
$in_auto = 0;
} elsif ($_ eq "## ## Start Default Options ##\n") {
$in_opts = $in_auto;
} elsif ($_ eq "## ## End Default Options ##\n") {
$in_opts = 0;
}
}
}
if ($text ne '') {
push @results, [$text];
}
return @results;
}
sub grub1_list {
my ($file) = @_;
my %options;
for (grub1_parse($file)) {
my ($text, $name, $value) = @$_;
next unless defined($name);
$options{$name} = $value;
}
my @bdevs;
if (exists($options{kopt_2_6})) {
push @bdevs, kernel_list($options{kopt_2_6});
} elsif (exists($options{kopt})) {
push @bdevs, kernel_list($options{kopt});
}
if (exists($options{xenkopt})) {
push @bdevs, kernel_list($options{xenkopt});
}
return @bdevs;
}
sub grub1_update {
my ($old, $new, $map) = @_;
my %options;
for (grub1_parse($old)) {
my ($text, $name, $value) = @$_;
next unless defined($name);
$options{$name} = $value;
}
$old->seek(0, 0);
for (grub1_parse($old)) {
my ($text, $name, $value) = @$_;
if (defined($name) &&
($name eq 'kopt_2_6' ||
($name eq 'kopt' && !exists($options{kopt_2_6})) ||
$name eq 'xenkopt')) {
if (defined(my $new_value = kernel_update($value, $map))) {
$text = "## $name=$value\n# $name=$new_value\n";
}
}
$new->print($text);
}
}
sub grub1_post {
system('update-grub');
}
### GRUB 2 config
sub grub2_list {
my ($file) = @_;
my @bdevs;
while (1) {
my ($text, $name, $value) = shellvars_next($file);
last unless defined($text);
if (defined($name) && $name =~ /^GRUB_CMDLINE_LINUX(?:_DEFAULT)?$/) {
push @bdevs, kernel_list($value);
}
}
return @bdevs;
}
sub grub2_update {
my ($old, $new, $map) = @_;
my @bdevs;
while (1) {
my ($text, $name, $value) = shellvars_next($old);
last unless defined($text);
if (defined($name) && $name =~ /^GRUB_CMDLINE_LINUX(?:_DEFAULT)?$/ &&
defined(my $new_value = kernel_update($value, $map))) {
$text =~ s/^/# /gm;
$text .= sprintf("%s=%s\n", $name, shellvars_quote($new_value));
}
$new->print($text);
}
}
sub grub2_post {
system('grub-mkconfig', '-o', '/boot/grub/grub.cfg');
}
### LILO
sub lilo_tokenize {
# Based on cfg_get_token() and next() in cfg.c.
# Line boundaries are *not* significant (except as white space) so
# we tokenize the whole file at once.
my ($file) = @_;
my @tokens = ();
my $text = '';
my $token;
my $in_quote = 0;
while (<$file>) {
# If this is the continuation of a multi-line quote, skip
# leading space and push back the necessary context.
if ($in_quote) {
s/^[ \t]*/"/;
$text .= $&;
}
pos = 0;
while (/\G \s* (?:\#.*)?
(?: (=) |
" ((?:[^"] | \\[\\"n])*) (" | \\\r?\n) |
((?:[^\s\#="\\] | \\[^\r\n])+) (\\\r?\n)?)?
/gsx) {
my $cont;
my $new_text = $&;
if (defined($1)) {
# equals sign
$text = $new_text;
$token = $1;
$cont = 0;
} elsif (defined($2)) {
# quoted text
if (!$in_quote) {
$text = $new_text;
$token = $2;
} else {
$text .= substr($new_text, 1); # remove the quote again; ick
$token .= ' ' . $2;
}
$cont = $3 ne '"';
} elsif (defined($4)) {
# unquoted word
if (!defined($token)) {
$token = '';
}
$text .= $new_text;
$token .= $4;
$cont = defined($5);
} else {
$text .= $new_text;
$cont = $new_text eq '';
}
if (!$cont) {
if ($text =~ /(?:^|[^\\])\$/) {
# unhandled expansion
$token = undef;
} elsif (defined($token)) {
if ($in_quote) {
$token =~ s/\\(.)/$1 eq 'n' ? "\n" : $1/eg;
} else {
$token =~ s/\\(.)/$1/g;
}
}
push @tokens, [$text, $token];
$text = '';
$token = undef;
$in_quote = 0;
}
}
}
return @tokens;
}
sub lilo_list {
my ($file) = @_;
my @bdevs = ();
my @tokens = lilo_tokenize($file);
my $i = 0;
my $in_generic = 1; # global or image=/vmlinuz or image=/vmlinuz.old
while ($i <= $#tokens) {
# Configuration items are either <name> "=" <value> or <name> alone.
if ($#tokens - $i >= 2 &&
defined($tokens[$i + 1][1]) && $tokens[$i + 1][1] eq '=') {
my ($name, $value) = ($tokens[$i][1], $tokens[$i + 2][1]);
if (defined($name) && defined($value)) {
if ($name eq 'image') {
$in_generic = ($value =~ m|^(?:/boot)?/vmlinuz(?:\.old)?$|);
} elsif ($in_generic) {
if ($name =~ /^(?:boot|root)$/) {
push @bdevs, $value;
} elsif ($name =~ /^(?:addappend|append|literal)$/) {
push @bdevs, kernel_list($value);
}
}
}
$i += 3;
} else {
$i += 1;
}
}
return @bdevs;
}
sub _lilo_update {
my ($old, $new, $map, $replace) = @_;
my @tokens = lilo_tokenize($old);
my $i = 0;
my $in_generic = 1; # global or image=/vmlinuz or image=/vmlinuz.old
while ($i <= $#tokens) {
my $text = $tokens[$i][0];
if ($#tokens - $i >= 2 &&
defined($tokens[$i + 1][1]) && $tokens[$i + 1][1] eq '=') {
my ($name, $value) = ($tokens[$i][1], $tokens[$i + 2][1]);
my $new_value;
if (defined($name) && defined($value)) {
if ($name eq 'image') {
$in_generic = ($value =~ m|^(?:/boot)?/vmlinuz(?:\.old)?$|);
} elsif ($in_generic) {
if ($name eq 'boot') {
# 'boot' is used directly by the lilo command, which
# doesn't use libblkid
$new_value = $map->{$value} && id_to_path($map->{$value});
} elsif ($name eq 'root') {
# 'root' adds a root parameter to the kernel command
# line
$new_value = $map->{$value};
} elsif ($name =~ /^(?:addappend|append|literal)$/) {
# These are all destined for the kernel command line
# in some way
$new_value = kernel_update($value, $map);
}
}
}
if (defined($new_value)) {
$new_value =~ s/\\/\\\\/g;
$text = &{$replace}($name, $value, $new_value) ||
"\n# $name = $value\n$name = \"$new_value\"\n";
} else {
$text .= $tokens[$i + 1][0] . $tokens[$i + 2][0];
}
$i += 3;
} else {
$i += 1;
}
$new->print($text);
}
}
sub lilo_update {
my ($old, $new, $map) = @_;
_lilo_update($old, $new, $map, sub { return undef });
}
sub lilo_post {
system('lilo');
}
### SILO
sub silo_post {
system('silo');
}
### Yaboot
sub yaboot_post {
system('ybin');
}
### ELILO
sub elilo_update {
my ($old, $new, $map) = @_;
# Work around bug #581173 - boot value must have no space before
# and no quotes around it.
sub replace {
my ($name, $value, $new_value) = @_;
return ($name eq 'boot') ? "# boot=$value\nboot=$new_value\n" : undef;
}
_lilo_update($old, $new, $map, \&replace);
}
sub elilo_post {
system('elilo');
}
### extlinux
sub extlinux_old_path {
for ('/boot/extlinux', '/boot/boot/exlinux', '/extlinux') {
if (-e) {
return "$_/options.cfg";
}
}
return undef;
}
sub extlinux_old_list {
my ($file) = @_;
while (<$file>) {
if (/^## ROOT=(.*)/) {
return kernel_list($1);
}
}
return ();
}
sub extlinux_old_update {
my ($old, $new, $map) = @_;
while (<$old>) {
my $text = $_;
if (/^## ROOT=(.*)/) {
my $new_params = kernel_update($1, $map);
if (defined($new_params)) {
$text = "## $text" . "## ROOT=$new_params\n";
}
}
$new->print($text);
}
}
sub extlinux_new_list {
my ($file) = @_;
while (<$file>) {
if (/^# ROOT=(.*)/) {
return kernel_list($1);
}
}
return ();
}
sub extlinux_new_update {
my ($old, $new, $map) = @_;
while (<$old>) {
my $text = $_;
if (/^# ROOT=(.*)/) {
my $new_params = kernel_update($1, $map);
if (defined($new_params)) {
$text = "## $text" . "# ROOT=$new_params\n";
}
}
$new->print($text);
}
}
sub extlinux_post {
system('update-extlinux');
}
# udev persistent-cd
sub udev_next {
my ($file) = @_;
my @results = ();
# Based on parse_file() and get_key() in udev-rules.c
while (1) {
my $text = <$file>;
last if !defined($text) || $text eq '';
if ($text =~ /^\s*(?:#|$)/) {
push @results, [$text];
} else {
my $end_pos = 0;
while ($text =~ /\G [\s,]* ((?:[^\s=+!:]|[+!:](?!=))+)
\s* ([=+!:]?=) "([^"]*)"/gx) {
push @results, [$&, $1, $2, $3];
$end_pos = pos($text);
}
push @results, [substr($text, $end_pos)];
last if $text !~ /\\\n$/;
}
}
return @results;
}
sub udev_parse_symlink_rule {
my ($path, $symlink);
for (@_) {
my ($text, $key, $op, $value) = @$_;
next if !defined($key);
if ($key eq 'ENV{ID_PATH}' && $op eq '==') {
$path = $value;
} elsif ($key eq 'SYMLINK' && $op eq '+=') {
$symlink = $value;
}
}
return ($path, $symlink);
}
# Find symlink rules using IDE device paths that aren't matched by rules
# using the corresponding SCSI device path. Return an array containing
# the corresponding path for each rule where this is the case and undef
# for all other rules.
sub udev_cd_find_unmatched_ide_rules {
my ($file) = @_;
my %wanted_rule;
my @unmatched;
my $i = 0;
while (1) {
my @keys = udev_next($file);
last if $#keys < 0;
my ($path, $symlink) = udev_parse_symlink_rule(@keys);
if (defined($path) && defined($symlink)) {
if ($path =~ /-ide-\d+:\d+$/) {
# libata uses the PATA controller and device numbers
# as SCSI host number and bus id. Channel number and
# LUN are always 0. The parent device path should
# stay the same.
$path =~ s/-ide-(\d+):(\d+)$/-scsi-$1:0:$2:0/;
my $rule_key = $path . ' ' . $symlink;
if (!exists($wanted_rule{$rule_key})) {
$wanted_rule{$rule_key} = $i;
$unmatched[$i] = $path;
}
} elsif ($path =~ /-scsi-\d+:\d+:\d+:\d+$/) {
my $rule_key = $path . ' ' . $symlink;
my $j = $wanted_rule{$rule_key};
if (defined($j) && $j >= 0) {
$unmatched[$j] = undef;
}
$wanted_rule{$rule_key} = -1;
}
}
++$i;
}
return @unmatched;
}
sub udev_cd_needs_update {
my ($file) = @_;
my %paths;
for (udev_cd_find_unmatched_ide_rules($file)) {
if (defined($_)) {
$paths{$_} = 1;
}
}
return join('\n', map({"+ PATH=$_"} keys(%paths)));
}
sub udev_cd_update {
my ($old, $new) = @_; # ignore map
# Find which rules we will need to copy and edit, then rewind
my @unmatched = udev_cd_find_unmatched_ide_rules($old);
$old->seek(0, 0);
my $i = 0;
while (1) {
my @keys = udev_next($old);
last if $#keys < 0;
my $old_text = '';
my $new_text = '';
for (@keys) {
my ($text, $key, $op, $value) = @$_;
$old_text .= $text;
next unless defined($unmatched[$i]) && defined($key);
if ($key eq 'ENV{ID_PATH}' && $op eq '==') {
my $value = $unmatched[$i];
$new_text .= ", $key$op\"$value\"";
} else {
$new_text .= $text;
}
}
$new->print($old_text);
if ($unmatched[$i]) {
$new->print($new_text . "\n");
}
++$i;
}
}
# initramfs-tools resume
sub initramfs_resume_list {
my ($file) = @_;
my @results = ();
while (1) {
my ($text, $name, $value) = shellvars_next($file);
last unless defined($text);
if (defined($name) && $name eq 'RESUME') {
$results[0] = $value;
}
}
return @results;
}
sub initramfs_resume_update {
my ($old, $new, $map) = @_;
while (1) {
my ($text, $name, $value) = shellvars_next($old);
last unless defined($text);
if (defined($name) && $name eq 'RESUME' &&
defined(my $new_value = $map->{$value})) {
$text =~ s/^/# /gm;
$text .= sprintf("%s=%s\n", $name, shellvars_quote($new_value));
}
$new->print($text);
}
}
# uswsusp resume
sub uswsusp_next {
# Based on parse_line() in config_parser.c
my ($file) = @_;
my $text = <$file>;
if (!defined($text) || $text eq '') {
return ();
}
local $_ = $text;
s/^\s*(?:#.*)?//;
s/\s*$//;
if ($text =~ /^([\w ]*\w)[ \t]*[:=][ \t]*(.+)$/) {
return ($text, $1, $2);
} else {
return ($text);
}
}
sub uswsusp_resume_list {
my ($file) = @_;
my @results = ();
while (1) {
my ($text, $name, $value) = uswsusp_next($file);
last unless defined($text);
if (defined($name) && $name eq 'resume device') {
$results[0] = $value;
}
}
return @results;
}
sub uswsusp_resume_update {
my ($old, $new, $map) = @_;
while (1) {
my ($text, $name, $value) = uswsusp_next($old);
last unless defined($text);
if (defined($name) && $name eq 'resume device' &&
defined(my $new_value = $map->{$value})) {
$text =~ s/^/# /gm;
$text .= sprintf("%s = %s\n", $name, id_to_path($new_value));
}
$new->print($text);
}
}
# cryptsetup
sub cryptsetup_next {
my ($file) = @_;
my $text = <$file>;
unless (defined($text)) {
return ();
}
my $line = $text;
if ($line =~ /^\s*(#|$)/) {
return ($text);
} else {
$line =~ s/\s*$//;
$line =~ s/^\s*//;
return ($text, split(/\s+/, $line, 4));
}
}
sub cryptsetup_list {
my ($file) = @_;
my (@results) = ();
while (1) {
my ($text, undef, $src) = cryptsetup_next($file);
last unless defined($text);
if (defined($src)) {
push @results, $src;
}
}
return @results;
}
sub cryptsetup_update {
my ($old, $new, $map) = @_;
while (1) {
my ($text, $dst, $src, $key, $opts) = cryptsetup_next($old);
last unless defined($text);
if (defined($src) && defined($map->{$src})) {
$text = "# $text" .
join(' ', $dst, $map->{$src}, $key, $opts) . "\n";
}
$new->print($text);
}
}
# hdparm
sub hdparm_list {
my ($file) = @_;
my (@results) = ();
# I really can't be bothered to parse this mess. Just see if
# there's anything like a device name on a non-comment line.
while (<$file>) {
if (!/^\s*#/) {
push @results, grep({m|^/dev/|} split(/\s+/));
}
}
return @results;
}
### mdadm
sub mdadm_list {
my ($file) = @_;
my (@results) = ();
while (<$file>) {
# Look for DEVICE (case-insensitive, may be abbreviated to as
# little as 3 letters) followed by a whitespace-separated list
# of devices (or wildcards, or keywords!). Ignore comments
# (hash preceded by whitespace).
if (/^DEV(?:I(?:C(?:E)?)?)?[ \t]*((?:[^ \t]|[ \t][^#])*)/i) {
push @results, split(/[ \t]+/, $1);
}
}
return @results;
}
### list of all configuration files and functions
my @config_files = ({packages => 'mount',
path => '/etc/fstab',
list => \&fstab_list,
update => \&fstab_update},
{packages => 'grub grub-legacy',
path => grub1_path(),
list => \&grub1_list,
update => \&grub1_update,
post_update => \&grub1_post,
is_boot_loader => 1},
{packages => 'grub-common',
path => '/etc/default/grub',
list => \&grub2_list,
update => \&grub2_update,
post_update => \&grub2_post,
is_boot_loader => 1},
{packages => 'lilo',
path => '/etc/lilo.conf',
list => \&lilo_list,
update => \&lilo_update,
post_update => \&lilo_post,
is_boot_loader => 1},
{packages => 'silo',
path => '/etc/silo.conf',
list => \&lilo_list,
update => \&lilo_update,
post_update => \&silo_post,
is_boot_loader => 1},
{packages => 'quik',
path => '/etc/quik.conf',
list => \&lilo_list,
update => \&lilo_update,
is_boot_loader => 1},
{packages => 'yaboot',
path => '/etc/yaboot.conf',
list => \&lilo_list,
update => \&lilo_update,
post_update => \&yaboot_post,
is_boot_loader => 1},
{packages => 'elilo',
path => '/etc/elilo.conf',
list => \&lilo_list,
update => \&elilo_update,
post_update => \&elilo_post,
is_boot_loader => 1},
{packages => 'extlinux',
path => extlinux_old_path(),
list => \&extlinux_old_list,
update => \&extlinux_old_update,
post_update => \&extlinux_post,
is_boot_loader => 1},
{packages => 'extlinux',
path => '/etc/default/extlinux',
list => \&extlinux_new_list,
update => \&extlinux_new_update,
post_update => \&extlinux_post,
is_boot_loader => 1},
{packages => 'udev',
path => '/etc/udev/rules.d/70-persistent-cd.rules',
needs_update => \&udev_cd_needs_update,
update => \&udev_cd_update},
{packages => 'initramfs-tools',
path => '/etc/initramfs-tools/conf.d/resume',
list => \&initramfs_resume_list,
update => \&initramfs_resume_update,
# udev will source all files in this directory,
# with few exceptions. Such as including a '^'.
suffix => '^old'},
{packages => 'uswsusp',
path => '/etc/uswsusp.conf',
list => \&uswsusp_resume_list,
update => \&uswsusp_resume_update},
{packages => 'cryptsetup',
path => '/etc/crypttab',
list => \&cryptsetup_list,
update => \&cryptsetup_update},
# mdadm.conf requires manual update because it may
# contain wildcards.
{packages => 'mdadm',
path => '/etc/mdadm/mdadm.conf',
list => \&mdadm_list},
# hdparm.conf requires manual update because it
# (1) refers to whole disks (2) might not work
# properly with the new drivers (3) is in a very
# special format.
{packages => 'hdparm',
path => '/etc/hdparm.conf',
list => \&hdparm_list});
### Filesystem labels and UUIDs
sub ext2_set_label {
my ($bdev, $label) = @_;
system('tune2fs', '-L', $label, $bdev) == 0 or die "tune2fs failed: $?";
}
sub ext2_set_uuid {
my ($bdev, $uuid) = @_;
system('tune2fs', '-U', $uuid, $bdev) == 0 or die "tune2fs failed: $?";
}
sub jfs_set_label {
my ($bdev, $label) = @_;
system('jfs_tune', '-L', $label, $bdev) == 0 or die "jfs_tune failed: $?";
}
sub jfs_set_uuid {
my ($bdev, $uuid) = @_;
system('jfs_tune', '-U', $uuid, $bdev) == 0 or die "jfs_tune failed: $?";
}
sub fat_set_label {
my ($bdev, $label) = @_;
system('dosfslabel', $bdev, $label) == 0 or die "dosfslabel failed: $?";
}
sub ntfs_set_label {
my ($bdev, $label) = @_;
system('ntfslabel', $bdev, $label) == 0 or die "ntfslabel failed: $?";
}
sub reiserfs_set_label {
my ($bdev, $label) = @_;
system('reiserfstune', '--label', $label, $bdev)
or die "reiserfstune failed: $?";
}
sub reiserfs_set_uuid {
my ($bdev, $uuid) = @_;
system('reiserfstune', '--uuid', $uuid, $bdev)
or die "reiserfstune failed: $?";
}
# There is no command to relabel swap, and we mustn't run mkswap if
# the partition is already in use. Thankfully the header format is
# pretty simple; it starts with this structure:
# struct swap_header_v1_2 {
# char bootbits[1024]; /* Space for disklabel etc. */
# unsigned int version;
# unsigned int last_page;
# unsigned int nr_badpages;
# unsigned char uuid[16];
# char volume_name[16];
# unsigned int padding[117];
# unsigned int badpages[1];
# };
# and has the signature 'SWAPSPACE2' at the end of the first page.
use constant { SWAP_SIGNATURE => 'SWAPSPACE2',
SWAP_UUID_OFFSET => 1036, SWAP_UUID_LEN => 16,
SWAP_LABEL_OFFSET => 1052, SWAP_LABEL_LEN => 16 };
sub _swap_set_field {
my ($bdev, $offset, $value) = @_;
my $pagesize = POSIX::sysconf(POSIX::_SC_PAGESIZE) or die "$!";
my ($length, $signature);
my $fd = POSIX::open($bdev, POSIX::O_RDWR);
defined($fd) or die "$!";
# Check the signature
POSIX::lseek($fd, $pagesize - length(SWAP_SIGNATURE), POSIX::SEEK_SET);
$length = POSIX::read($fd, $signature, length(SWAP_SIGNATURE));
if (!defined($length) || $signature ne SWAP_SIGNATURE) {
POSIX::close($fd);
die "swap signature not found on $bdev";
}
# Set the field
POSIX::lseek($fd, $offset, POSIX::SEEK_SET);
$length = POSIX::write($fd, $value, length($value));
if (!defined($length) || $length != length($value)) {
my $error = "$!";
POSIX::close($fd);
die $error;
}
POSIX::close($fd);
}
sub swap_set_label {
my ($bdev, $label) = @_;
_swap_set_field($bdev, SWAP_LABEL_OFFSET, pack('Z' . SWAP_LABEL_LEN, $label));
}
sub swap_set_uuid {
my ($bdev, $uuid) = @_;
my $uuid_bin;
if (UUID::parse($uuid, $uuid_bin) != 0 ||
length($uuid_bin) != SWAP_UUID_LEN) {
die "internal error: invalid UUID string";
}
_swap_set_field($bdev, SWAP_UUID_OFFSET, $uuid_bin);
}
sub ufs_set_label {
my ($bdev, $label) = @_;
system('tunefs.ufs', '-L', $label, $bdev) or die "tunefs.ufs failed: $?";
}
sub xfs_set_label {
my ($bdev, $label) = @_;
system('xfs_admin', '-L', $label, $bdev) or die "xfs_admin failed: $?";
}
sub xfs_set_uuid {
my ($bdev, $uuid) = @_;
system('xfs_admin', '-U', $uuid, $bdev) or die "xfs_admin failed: $?";
}
my %filesystem_types = (
ext2 => { label_len => 16, set_label => \&ext2_set_label,
set_uuid => \&ext2_set_uuid },
ext3 => { label_len => 16, set_label => \&ext2_set_label,
set_uuid => \&ext2_set_uuid },
ext4 => { label_len => 16, set_label => \&ext2_set_label,
set_uuid => \&ext2_set_uuid },
jfs => { label_len => 16, set_label => \&jfs_set_label,
set_uuid => \&jfs_set_uuid },
msdos => { label_len => 11, set_label => \&fat_set_label },
ntfs => { label_len => 128, set_label => \&ntfs_set_label },
reiserfs => { label_len => 16, set_label => \&reiserfs_set_label,
set_uuid => \&reiserfs_set_uuid },
swap => { label_len => SWAP_LABEL_LEN, set_label => \&swap_set_label,
set_uuid => \&swap_set_uuid },
ufs => { label_len => 32, set_label => \&ufs_set_label },
vfat => { label_len => 11, set_label => \&fat_set_label },
xfs => { label_len => 12, set_label => \&xfs_set_label,
set_uuid => \&xfs_set_uuid }
);
my %bdev_map;
my %id_map;
sub scan_config_files {
my @configs;
# Find all IDE/SCSI disks mentioned in configurations
for my $config (@config_files) {
# Is the file present?
my $path = $config->{path};
if (!defined($path)) {
next;
}
my $file = new FileHandle($path, 'r');
if (!defined($file)) {
if ($! == POSIX::ENOENT) {
next;
}
die "$!";
}
# Are any of the related packages wanted or installed?
my $wanted = 0;
my $installed = 0;
my $packages = $config->{packages};
for (`dpkg-query 2>/dev/null --showformat '\${status}\\n' -W $packages`)
{
$wanted = 1 if /^install /;
$installed = 1 if / installed\n$/;
}
if (!$wanted && !$installed) {
next;
}
my @matched_bdevs = ();
my $id_map_text;
my $needs_update;
if (exists($config->{needs_update})) {
$id_map_text = &{$config->{needs_update}}($file);
$needs_update = defined($id_map_text) && $id_map_text ne '';
} elsif (exists($config->{list})) {
for my $bdev (&{$config->{list}}($file)) {
# Match standard IDE and SCSI device names, plus wildcards
# in disk device names to allow for mdadm insanity.
if ($bdev =~ m{^/dev/(?:[hs]d[a-z\?\*][\d\?\*]*|
s(?:cd|r)\d+)$}x &&
($bdev =~ m/[\?\*]/ || -b $bdev)) {
$bdev_map{$bdev} = {};
push @matched_bdevs, $bdev;
}
}
$needs_update = @matched_bdevs > 0;
} else {
# Needs manual update
$needs_update = 1;
}
push @configs, {config => $config,
devices => \@matched_bdevs,
id_map_text => $id_map_text,
installed => $installed,
needs_update => $needs_update};
}
my $fstab = new FileHandle('/etc/fstab', 'r') or die "$!";
while (1) {
my ($text, $bdev, $path, $type) = fstab_next($fstab);
last unless defined($text);
if (defined($type) && exists($bdev_map{$bdev})) {
$bdev_map{$bdev}->{path} = $path;
$bdev_map{$bdev}->{type} = $type;
}
}
$fstab->close();
return @configs;
}
sub add_tag {
# Map disks to labels/UUIDs and vice versa. Include all disks in
# the reverse mapping so we can detect ambiguity.
my ($bdev, $name, $value, $new) = @_;
my $id = "$name=$value";
push @{$id_map{$id}}, $bdev;
if (exists($bdev_map{$bdev})) {
$bdev_map{$bdev}->{$name} = $value;
push @{$bdev_map{$bdev}->{ids}}, $id;
}
if ($new) {
$bdev_map{$bdev}->{new_id} = $id;
}
}
sub scan_devices {
my $id_command;
if (-x '/sbin/vol_id') {
$id_command = '/sbin/vol_id';
} else {
$id_command = 'blkid -o udev -s LABEL -s UUID -s TYPE';
}
for (`blkid -o device`) {
chomp;
my $bdev = $_;
for (`$id_command '$bdev'`) {
if (/^ID_FS_(LABEL|UUID)_ENC=(.+)\n$/) {
add_tag($bdev, $1, $2);
} elsif (/^ID_FS_TYPE=(.+)\n$/ && exists($bdev_map{$bdev})) {
$bdev_map{$bdev}->{type} //= $1;
}
}
}
# Discard UUIDs for LVM2 PVs, as we assume there are symlinks for all
# UUIDs under /dev/disk/by-uuid and this is not true for PVs.
# Discard all labels and UUIDs(!) that are ambiguous.
# Discard all labels with 'unsafe' characters (escaped by blkid using
# backslashes) as they will not be usable in all configuration files.
# Similarly for '#' which blkid surprisingly does not consider unsafe.
# Sort each device's IDs in reverse lexical order so that UUIDs are
# preferred.
for my $bdev (keys(%bdev_map)) {
if ($bdev_map{$bdev}->{type} eq 'LVM2_member') {
@{$bdev_map{$bdev}->{ids}} = ();
} else {
@{$bdev_map{$bdev}->{ids}} =
sort({$b cmp $a}
grep({ @{$id_map{$_}} == 1 && $_ !~ /[\\#]/ }
@{$bdev_map{$bdev}->{ids}}));
}
}
# Add persistent aliases for CD/DVD/BD drives
my $cd_rules =
new FileHandle('/etc/udev/rules.d/70-persistent-cd.rules', 'r');
while (defined($cd_rules)) {
my @keys = udev_next($cd_rules);
last if $#keys < 0;
my ($path, $symlink) = udev_parse_symlink_rule(@keys);
if (defined($path) && defined($symlink)) {
$symlink =~ s{^(?!/)}{/dev/};
my $bdev = readlink($symlink) or next;
$bdev =~ s{^(?!/)}{/dev/};
if (exists($bdev_map{$bdev})) {
push @{$bdev_map{$bdev}->{ids}}, $symlink;
}
}
}
}
sub assign_new_ids {
my $hostname = (POSIX::uname())[1];
# For all devices that have no alternate device ids, suggest setting
# UUIDs, labelling them based on fstab or just using a generic label.
for my $bdev (keys(%bdev_map)) {
next if $#{$bdev_map{$bdev}->{ids}} >= 0;
my $type = $bdev_map{$bdev}->{type};
next unless defined($type) && exists($filesystem_types{$type});
if (defined($filesystem_types{$type}->{set_uuid})) {
my ($uuid_bin, $uuid);
UUID::generate($uuid_bin);
UUID::unparse($uuid_bin, $uuid);
add_tag($bdev, 'UUID', $uuid, 1);
next;
}
my $label_len = $filesystem_types{$type}->{label_len};
my $label;
use bytes; # string lengths are in bytes
if (defined($bdev_map{$bdev}->{path})) {
# Convert path/type to label; prepend hostname if possible;
# append numeric suffix if necessary.
my $base;
if ($bdev_map{$bdev}->{path} =~ m|^/|) {
$base = $bdev_map{$bdev}->{path};
} else {
$base = $bdev_map{$bdev}->{type};
}
$base =~ s/[^\w]+/-/g;
$base =~ s/^-//g;
$base =~ s/-$//g;
my $n = 0;
my $suffix = '';
do {
$label = "$hostname-$base$suffix";
if (length($label) > $label_len) {
$label = substr($base, 0, $label_len - length($suffix))
. $suffix;
}
$n++;
$suffix = "-$n";
} while (exists($id_map{"LABEL=$label"}));
} else {
my $n = 0;
my $suffix;
do {
$n++;
$suffix = "-$n";
$label = substr($hostname, 0, $label_len - length($suffix))
. $suffix;
} while (exists($id_map{"LABEL=$label"}));
}
add_tag($bdev, 'LABEL', $label, 1);
}
}
sub set_new_ids {
for my $bdev (keys(%bdev_map)) {
my $bdev_info = $bdev_map{$bdev};
if ($bdev_info->{new_id}) {
my ($name, $value) = split(/=/, $bdev_info->{new_id}, 2);
my $setter;
if ($name eq 'UUID') {
$setter = $filesystem_types{$bdev_info->{type}}->{set_uuid};
} elsif ($name eq 'LABEL') {
$setter = $filesystem_types{$bdev_info->{type}}->{set_label};
}
defined($setter) or die "internal error: invalid new_id type";
&{$setter}($bdev, $value);
}
}
}
sub update_config {
my $map = shift;
for my $match (@_) {
# Generate a new config
my $path = $match->{config}->{path};
my $old = new FileHandle($path, 'r') or die "$!";
my $new = new FileHandle("$path.new", POSIX::O_WRONLY | POSIX::O_CREAT,
0600)
or die "$!";
&{$match->{config}->{update}}($old, $new, $map);
$old->close();
$new->close();
# New config should have same permissions as the old
my (undef, undef, $mode, undef, $uid, $gid) = stat($path) or die "$!";
chown($uid, $gid, "$path.new") or die "$!";
chmod($mode & 07777, "$path.new") or die "$!";
# Back up the old config and replace with the new
my $old_path = $path . ($match->{config}->{suffix} || '.old');
unlink($old_path);
link($path, $old_path) or die "$!";
rename("$path.new", $path) or die "$!";
# If the package is installed, run the post-update function
if ($match->{installed} && $match->{config}->{post_update}) {
&{$match->{config}->{post_update}}();
}
}
}
sub update_all {
# The update process may be aborted if a command fails, but we now
# want to recover and ask the user what to do. We can use 'do' to
# prevent 'die' from exiting the process, but we also need to
# capture and present error messages using debconf as they may
# otherwise be hidden. Therefore, we fork and capture stdout and
# stderr from the update process in the main process.
my $pid = open(PIPE, '-|');
return (-1, '') unless defined $pid;
if ($pid == 0) {
# Complete redirection
# </dev/null
POSIX::close(0);
POSIX::open('/dev/null', POSIX::O_RDONLY) or die "$!";
# 2>&1
POSIX::dup2(1, 2) or die "$!";
# Do the update
set_new_ids();
update_config(@_);
exit;
} else {
my @output = ();
while (<PIPE>) {
push @output, $_;
}
close(PIPE);
return ($?, join('', @output));
}
}
sub transition {
use Debconf::Client::ConfModule ':all';
retry:
%bdev_map = ();
%id_map = ();
my @found_configs = scan_config_files();
my @matched_configs = grep({$_->{needs_update}} @found_configs);
my @auto_configs = grep({defined($_->{config}->{update})} @matched_configs);
my $found_boot_loader =
grep({$_->{config}->{is_boot_loader} && $_->{installed}} @found_configs);
my %update_map = ();
# We can skip all of this if we didn't find any configuration
# files that need conversion and we found the configuration file
# for an installed boot loader.
if (!@matched_configs && $found_boot_loader) {
return;
}
my ($question, $answer, $ret, $seen);
$question = 'linux-base/disk-id-convert-auto';
($ret, $seen) = input('high', $question);
if ($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 retrieving answer for $question: $answer" if $ret;
if (@auto_configs && $answer eq 'true') {
scan_devices();
assign_new_ids();
# Construct the device ID update map
for my $bdev (keys(%bdev_map)) {
if (@{$bdev_map{$bdev}->{ids}}) {
$update_map{$bdev} = $bdev_map{$bdev}->{ids}->[0];
}
}
# Weed out configurations which will be unaffected by this
# mapping or by a custom mapping described in id_map_text.
@auto_configs = grep({ defined($_->{id_map_text}) ||
grep({exists($update_map{$_})}
@{$_->{devices}}) }
@auto_configs);
}
if (@auto_configs && $answer eq 'true') {
if (grep({$bdev_map{$_}->{new_id}} keys(%bdev_map))) {
$question = 'linux-base/disk-id-convert-plan';
($ret, $seen) = subst($question, 'relabel',
join("\\n",
map({sprintf("%s: %s",
$_, $bdev_map{$_}->{new_id})}
grep({$bdev_map{$_}->{new_id}}
keys(%bdev_map)))));
die "Error setting debconf substitutions in $question: $seen" if $ret;
} else {
$question = 'linux-base/disk-id-convert-plan-no-relabel';
}
($ret, $seen) = subst($question, 'id_map',
join("\\n",
map({sprintf("%s: %s", $_, $update_map{$_})}
keys(%update_map)),
grep({defined}
map({$_->{id_map_text}} @auto_configs))));
die "Error setting debconf substitutions in $question: $seen" if $ret;
($ret, $seen) = subst($question, 'files',
join(', ',
map({$_->{config}->{path}} @auto_configs)));
die "Error setting debconf substitutions in $question: $seen" if $ret;
($ret, $seen) = input('high', $question);
if ($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 retrieving answer for $question: $answer" if $ret;
if ($answer eq 'true') {
my ($rc, $output) = update_all(\%update_map, @auto_configs);
if ($rc != 0) {
# Display output of update commands
$question = 'linux-base/disk-id-update-failed';
$output =~ s/\n/\\n/g;
($ret, $seen) = subst($question, 'output', $output);
die "Error setting debconf substitutions in $question: $seen"
if $ret;
($ret, $seen) = input('high', $question);
if ($ret && $ret != 30) {
die "Error setting debconf question $question: $seen";
}
($ret, $seen) = go();
if ($ret && $ret != 30) {
die "Error asking debconf question $question: $seen";
}
# Mark previous questions as unseen
fset('linux-base/disk-id-convert-auto', 'seen', 'false');
fset('linux-base/disk-id-convert-plan', 'seen', 'false');
fset('linux-base/disk-id-convert-plan-no-relabel', 'seen',
'false');
goto retry;
}
}
}
my @unconv_files = ();
for my $match (@matched_configs) {
if (!defined($match->{config}->{update})) {
push @unconv_files, $match->{config}->{path};
} else {
my @unconv_bdevs = grep({!exists($update_map{$_})}
@{$match->{devices}});
if (@unconv_bdevs) {
push @unconv_files, sprintf('%s: %s', $match->{config}->{path},
join(', ',@unconv_bdevs));
}
}
}
if (@unconv_files) {
$question = 'linux-base/disk-id-manual';
($ret, $seen) = subst($question, 'unconverted',
join("\\n", @unconv_files));
die "Error setting debconf substitutions in $question: $seen" if $ret;
($ret, $seen) = input('high', $question);
if ($ret && $ret != 30) {
die "Error setting debconf note $question: $seen";
}
($ret, $seen) = go();
if ($ret && $ret != 30) {
die "Error showing debconf note $question: $seen";
}
}
# Also note whether some (unknown) boot loader configuration file
# must be manually converted.
if (!$found_boot_loader) {
$question = 'linux-base/disk-id-manual-boot-loader';
($ret, $seen) = input('high', $question);
if ($ret && $ret != 30) {
die "Error setting debconf note $question: $seen";
}
($ret, $seen) = go();
if ($ret && $ret != 30) {
die "Error showing debconf note $question: $seen";
}
}
}
package DebianKernel::BootloaderConfig;
my %default_bootloader = (amd64 => 'lilo',
i386 => 'lilo',
ia64 => 'elilo',
s390 => 'zipl');
sub check {
use Debconf::Client::ConfModule ':all';
my ($deb_arch) = @_;
# Is there an historical 'default' boot loader for this architecture?
my $loader_exec = $default_bootloader{$deb_arch};
return unless defined($loader_exec);
# Is the boot loader installed?
my ($loaderloc) = grep(-x, map("$_/$loader_exec",
map({ length($_) ? $_ : "." }
split(/:/, $ENV{PATH}))));
return unless defined($loaderloc);
# Is do_bootloader explicitly set one way or the other?
my $do_bootloader;
if (my $conf = new FileHandle('/etc/kernel-img.conf', 'r')) {
while (<$conf>) {
$do_bootloader = 0 if /^\s*do_bootloader\s*=\s*(no|false|0)\s*$/i;
$do_bootloader = 1 if /^\s*do_bootloader\s*=\s*(yes|true|1)\s*$/i;
}
$conf->close();
}
return if defined($do_bootloader);
# Warn the user that do_bootloader is disabled by default.
my ($question, $ret, $seen);
$question = "linux-base/do-bootloader-default-changed";
($ret,$seen) = input('high', "$question");
die "Error setting debconf question $question: $seen" if $ret && $ret != 30;
($ret,$seen) = go();
die "Error asking debconf question $question: $seen" if $ret && $ret != 30;
}
package main;
capb('escape');
sub version_lessthan {
my ($left, $right) = @_;
return system('dpkg', '--compare-versions', $left, 'lt', $right) == 0;
}
# No upgrade work is necessary during a fresh system installation.
# But since linux-base is a new dependency of linux-image-* and did
# not exist until needed for the libata transition, we cannot simply
# test whether this is a fresh installation of linux-base. Instead,
# we test:
# - does /etc/fstab exist yet (this won't even work without it), and
# - are any linux-image-* packages installed yet?
sub is_fresh_installation {
if (-f '/etc/fstab') {
for (`dpkg-query 2>/dev/null --showformat '\${status}\\n' -W 'linux-image-*'`) {
return 0 if / installed\n$/;
}
}
return 1;
}
my $deb_arch = `dpkg --print-architecture`;
chomp $deb_arch;
if ($deb_arch ne 's390') {
my $libata_transition_ver =
($deb_arch eq 'i386' || $deb_arch eq 'amd64') ? '2.6.32-10' : '2.6.32-11';
if ($ARGV[0] eq 'reconfigure' || defined($ENV{DEBCONF_RECONFIGURE}) ||
(!is_fresh_installation() &&
version_lessthan($ARGV[1], $libata_transition_ver))) {
DebianKernel::DiskId::transition();
}
}
if (!is_fresh_installation() && version_lessthan($ARGV[1], '2.6.32-18')) {
DebianKernel::BootloaderConfig::check($deb_arch);
}
exec("set -e\nset -- @ARGV\n" . << 'EOF');
EOF
