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#!/usr/bin/perl
#
# dpkg-scanpackages
#
# Copyright © 2006-2012 Guillem Jover <guillem@debian.org>
#
# 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, see <https://www.gnu.org/licenses/>.
use warnings;
use strict;
use IO::Handle;
use IO::File;
use Getopt::Long qw(:config posix_default bundling no_ignorecase);
use Dpkg ();
use Dpkg::Gettext;
use Dpkg::ErrorHandling;
use Dpkg::Util qw(:list);
use Dpkg::Control;
use Dpkg::Version;
use Dpkg::Checksums;
use Dpkg::Compression::FileHandle;
use Dpkg::IPC;
textdomain('dpkg-dev');
# Do not pollute STDOUT with info messages
report_options(info_fh => \*STDERR);
my (@samemaint, @changedmaint);
my @spuriousover;
my %packages;
my %overridden;
my %options = (help => sub { usage(); exit 0; },
version => \&version,
type => undef,
arch => undef,
multiversion => 0,
'extra-override'=> undef,
medium => undef,
);
my @options_spec = (
'help|?',
'version',
'type|t=s',
'arch|a=s',
'multiversion|m!',
'extra-override|e=s',
'medium|M=s',
);
sub version {
printf _g("Debian %s version %s.\n"), $Dpkg::PROGNAME, $Dpkg::PROGVERSION;
exit;
}
sub usage {
printf _g(
"Usage: %s [<option>...] <binary-path> [<override-file> [<path-prefix>]] > Packages
Options:
-t, --type <type> scan for <type> packages (default is 'deb').
-a, --arch <arch> architecture to scan for.
-m, --multiversion allow multiple versions of a single package.
-e, --extra-override <file>
use extra override file.
-M, --medium <medium> add X-Medium field for dselect multicd access method
-?, --help show this help message.
--version show the version.
"), $Dpkg::PROGNAME;
}
sub load_override
{
my $override = shift;
my $comp_file = Dpkg::Compression::FileHandle->new(filename => $override);
while (<$comp_file>) {
s/\#.*//;
s/\s+$//;
next unless $_;
my ($p, $priority, $section, $maintainer) = split(/\s+/, $_, 4);
if (not defined($packages{$p})) {
push(@spuriousover, $p);
next;
}
for my $package (@{$packages{$p}}) {
if ($maintainer) {
if ($maintainer =~ m/(.+?)\s*=\>\s*(.+)/) {
my $oldmaint = $1;
my $newmaint = $2;
my $debmaint = $$package{Maintainer};
if (none { $debmaint eq $_ } split m{\s*//\s*}, $oldmaint) {
push(@changedmaint,
sprintf(_g(' %s (package says %s, not %s)'),
$p, $$package{Maintainer}, $oldmaint));
} else {
$$package{Maintainer} = $newmaint;
}
} elsif ($$package{Maintainer} eq $maintainer) {
push(@samemaint, " $p ($maintainer)");
} else {
warning(_g('unconditional maintainer override for %s'), $p);
$$package{Maintainer} = $maintainer;
}
}
$$package{Priority} = $priority;
$$package{Section} = $section;
}
$overridden{$p} = 1;
}
close($comp_file);
}
sub load_override_extra
{
my $extra_override = shift;
my $comp_file = Dpkg::Compression::FileHandle->new(filename => $extra_override);
while (<$comp_file>) {
s/\#.*//;
s/\s+$//;
next unless $_;
my ($p, $field, $value) = split(/\s+/, $_, 3);
next unless defined($packages{$p});
for my $package (@{$packages{$p}}) {
$$package{$field} = $value;
}
}
close($comp_file);
}
{
local $SIG{__WARN__} = sub { usageerr($_[0]) };
GetOptions(\%options, @options_spec);
}
if (not (@ARGV >= 1 and @ARGV <= 3)) {
usageerr(_g('one to three arguments expected'));
}
my $type = defined($options{type}) ? $options{type} : 'deb';
my $arch = $options{arch};
my @find_args;
if ($options{arch}) {
@find_args = ('(', '-name', "*_all.$type", '-o',
'-name', "*_${arch}.$type", ')');
}
else {
@find_args = ('-name', "*.$type");
}
my ($binarydir, $override, $pathprefix) = @ARGV;
if (not -d $binarydir) {
error(_g('binary dir %s not found'), $binarydir);
}
if (defined $override and not -e $override) {
error(_g('override file %s not found'), $override);
}
$pathprefix //= '';
my $find_h = IO::Handle->new();
open($find_h, '-|', 'find', '-L', "$binarydir/", @find_args, '-print')
or syserr(_g("couldn't open %s for reading"), $binarydir);
FILE:
while (<$find_h>) {
chomp;
my $fn = $_;
my $output;
my $pid = spawn(exec => [ 'dpkg-deb', '-I', $fn, 'control' ],
to_pipe => \$output);
my $fields = Dpkg::Control->new(type => CTRL_INDEX_PKG);
$fields->parse($output, $fn)
or error(_g("couldn't parse control information from %s"), $fn);
wait_child($pid, no_check => 1);
if ($?) {
warning(_g("\`dpkg-deb -I %s control' exited with %d, skipping package"),
$fn, $?);
next;
}
defined($fields->{'Package'})
or error(_g('no Package field in control file of %s'), $fn);
my $p = $fields->{'Package'};
if (defined($packages{$p}) and not $options{multiversion}) {
foreach (@{$packages{$p}}) {
if (version_compare_relation($fields->{'Version'}, REL_GT,
$_->{'Version'}))
{
warning(_g('package %s (filename %s) is repeat but newer version;'),
$p, $fn);
warning(_g('used that one and ignored data from %s!'),
$_->{Filename});
$packages{$p} = [];
} else {
warning(_g('package %s (filename %s) is repeat;'), $p, $fn);
warning(_g('ignored that one and using data from %s!'),
$_->{Filename});
next FILE;
}
}
}
warning(_g('package %s (filename %s) has Filename field!'), $p, $fn)
if defined($fields->{'Filename'});
$fields->{'Filename'} = "$pathprefix$fn";
my $sums = Dpkg::Checksums->new();
$sums->add_from_file($fn);
foreach my $alg (checksums_get_list()) {
if ($alg eq 'md5') {
$fields->{'MD5sum'} = $sums->get_checksum($fn, $alg);
} else {
$fields->{$alg} = $sums->get_checksum($fn, $alg);
}
}
$fields->{'Size'} = $sums->get_size($fn);
$fields->{'X-Medium'} = $options{medium} if defined $options{medium};
push @{$packages{$p}}, $fields;
}
close($find_h);
load_override($override) if defined $override;
load_override_extra($options{'extra-override'}) if defined $options{'extra-override'};
my @missingover=();
my $records_written = 0;
for my $p (sort keys %packages) {
if (defined($override) and not defined($overridden{$p})) {
push(@missingover,$p);
}
for my $package (@{$packages{$p}}) {
print("$package\n") or syserr(_g('failed when writing stdout'));
$records_written++;
}
}
close(STDOUT) or syserr(_g("couldn't close stdout"));
if (@changedmaint) {
warning(_g('Packages in override file with incorrect old maintainer value:'));
warning($_) foreach (@changedmaint);
}
if (@samemaint) {
warning(_g('Packages specifying same maintainer as override file:'));
warning($_) foreach (@samemaint);
}
if (@missingover) {
warning(_g('Packages in archive but missing from override file:'));
warning(' %s', join(' ', @missingover));
}
if (@spuriousover) {
warning(_g('Packages in override file but not in archive:'));
warning(' %s', join(' ', @spuriousover));
}
info(_g('Wrote %s entries to output Packages file.'), $records_written);