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-rw-r--r--scripts/Dpkg/Source/Patch.pm669
1 files changed, 669 insertions, 0 deletions
diff --git a/scripts/Dpkg/Source/Patch.pm b/scripts/Dpkg/Source/Patch.pm
new file mode 100644
index 0000000..25d5633
--- /dev/null
+++ b/scripts/Dpkg/Source/Patch.pm
@@ -0,0 +1,669 @@
+# Copyright © 2008 Raphaël Hertzog <hertzog@debian.org>
+# Copyright © 2008-2010, 2012-2015 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/>.
+
+package Dpkg::Source::Patch;
+
+use strict;
+use warnings;
+
+our $VERSION = '0.01';
+
+use POSIX qw(:errno_h :sys_wait_h);
+use File::Find;
+use File::Basename;
+use File::Spec;
+use File::Path qw(make_path);
+use File::Compare;
+use Fcntl ':mode';
+use Time::HiRes qw(stat);
+
+use Dpkg;
+use Dpkg::Gettext;
+use Dpkg::ErrorHandling;
+use Dpkg::IPC;
+use Dpkg::Source::Functions qw(fs_time);
+
+use parent qw(Dpkg::Compression::FileHandle);
+
+sub create {
+ my ($self, %opts) = @_;
+ $self->ensure_open('w'); # Creates the file
+ *$self->{errors} = 0;
+ *$self->{empty} = 1;
+ if ($opts{old} and $opts{new} and $opts{filename}) {
+ $opts{old} = '/dev/null' unless -e $opts{old};
+ $opts{new} = '/dev/null' unless -e $opts{new};
+ if (-d $opts{old} and -d $opts{new}) {
+ $self->add_diff_directory($opts{old}, $opts{new}, %opts);
+ } elsif (-f $opts{old} and -f $opts{new}) {
+ $self->add_diff_file($opts{old}, $opts{new}, %opts);
+ } else {
+ $self->_fail_not_same_type($opts{old}, $opts{new}, $opts{filename});
+ }
+ $self->finish() unless $opts{nofinish};
+ }
+}
+
+sub set_header {
+ my ($self, $header) = @_;
+ *$self->{header} = $header;
+}
+
+sub add_diff_file {
+ my ($self, $old, $new, %opts) = @_;
+ $opts{include_timestamp} //= 0;
+ my $handle_binary = $opts{handle_binary_func} // sub {
+ my ($self, $old, $new, %opts) = @_;
+ my $file = $opts{filename};
+ $self->_fail_with_msg($file, g_('binary file contents changed'));
+ };
+ # Optimization to avoid forking diff if unnecessary
+ return 1 if compare($old, $new, 4096) == 0;
+ # Default diff options
+ my @options;
+ if ($opts{options}) {
+ push @options, @{$opts{options}};
+ } else {
+ push @options, '-p';
+ }
+ # Add labels
+ if ($opts{label_old} and $opts{label_new}) {
+ if ($opts{include_timestamp}) {
+ my $ts = (stat($old))[9];
+ my $t = POSIX::strftime('%Y-%m-%d %H:%M:%S', gmtime($ts));
+ $opts{label_old} .= sprintf("\t%s.%09d +0000", $t,
+ ($ts - int($ts)) * 1_000_000_000);
+ $ts = (stat($new))[9];
+ $t = POSIX::strftime('%Y-%m-%d %H:%M:%S', gmtime($ts));
+ $opts{label_new} .= sprintf("\t%s.%09d +0000", $t,
+ ($ts - int($ts)) * 1_000_000_000);
+ } else {
+ # Space in filenames need special treatment
+ $opts{label_old} .= "\t" if $opts{label_old} =~ / /;
+ $opts{label_new} .= "\t" if $opts{label_new} =~ / /;
+ }
+ push @options, '-L', $opts{label_old},
+ '-L', $opts{label_new};
+ }
+ # Generate diff
+ my $diffgen;
+ my $diff_pid = spawn(
+ exec => [ 'diff', '-u', @options, '--', $old, $new ],
+ env => { LC_ALL => 'C', LANG => 'C', TZ => 'UTC0' },
+ to_pipe => \$diffgen,
+ );
+ # Check diff and write it in patch file
+ my $difflinefound = 0;
+ my $binary = 0;
+ local $_;
+
+ while (<$diffgen>) {
+ if (m/^(?:binary|[^-+\@ ].*\bdiffer\b)/i) {
+ $binary = 1;
+ $handle_binary->($self, $old, $new, %opts);
+ last;
+ } elsif (m/^[-+\@ ]/) {
+ $difflinefound++;
+ } elsif (m/^\\ /) {
+ warning(g_('file %s has no final newline (either ' .
+ 'original or modified version)'), $new);
+ } else {
+ chomp;
+ error(g_("unknown line from diff -u on %s: '%s'"), $new, $_);
+ }
+ if (*$self->{empty} and defined(*$self->{header})) {
+ $self->print(*$self->{header}) or syserr(g_('failed to write'));
+ *$self->{empty} = 0;
+ }
+ print { $self } $_ or syserr(g_('failed to write'));
+ }
+ close($diffgen) or syserr('close on diff pipe');
+ wait_child($diff_pid, nocheck => 1,
+ cmdline => "diff -u @options -- $old $new");
+ # Verify diff process ended successfully
+ # Exit code of diff: 0 => no difference, 1 => diff ok, 2 => error
+ # Ignore error if binary content detected
+ my $exit = WEXITSTATUS($?);
+ unless (WIFEXITED($?) && ($exit == 0 || $exit == 1 || $binary)) {
+ subprocerr(g_('diff on %s'), $new);
+ }
+ return ($exit == 0 || $exit == 1);
+}
+
+sub add_diff_directory {
+ my ($self, $old, $new, %opts) = @_;
+ # TODO: make this function more configurable
+ # - offer to disable some checks
+ my $basedir = $opts{basedirname} || basename($new);
+ my $diff_ignore;
+ if ($opts{diff_ignore_func}) {
+ $diff_ignore = $opts{diff_ignore_func};
+ } elsif ($opts{diff_ignore_regex}) {
+ $diff_ignore = sub { return $_[0] =~ /$opts{diff_ignore_regex}/o };
+ } else {
+ $diff_ignore = sub { return 0 };
+ }
+
+ my @diff_files;
+ my %files_in_new;
+ my $scan_new = sub {
+ my $fn = (length > length($new)) ? substr($_, length($new) + 1) : '.';
+ return if $diff_ignore->($fn);
+ $files_in_new{$fn} = 1;
+ lstat("$new/$fn") or syserr(g_('cannot stat file %s'), "$new/$fn");
+ my $mode = S_IMODE((lstat(_))[2]);
+ my $size = (lstat(_))[7];
+ if (-l _) {
+ unless (-l "$old/$fn") {
+ $self->_fail_not_same_type("$old/$fn", "$new/$fn", $fn);
+ return;
+ }
+ my $n = readlink("$new/$fn");
+ unless (defined $n) {
+ syserr(g_('cannot read link %s'), "$new/$fn");
+ }
+ my $n2 = readlink("$old/$fn");
+ unless (defined $n2) {
+ syserr(g_('cannot read link %s'), "$old/$fn");
+ }
+ unless ($n eq $n2) {
+ $self->_fail_not_same_type("$old/$fn", "$new/$fn", $fn);
+ }
+ } elsif (-f _) {
+ my $old_file = "$old/$fn";
+ if (not lstat("$old/$fn")) {
+ if ($! != ENOENT) {
+ syserr(g_('cannot stat file %s'), "$old/$fn");
+ }
+ $old_file = '/dev/null';
+ } elsif (not -f _) {
+ $self->_fail_not_same_type("$old/$fn", "$new/$fn", $fn);
+ return;
+ }
+
+ my $label_old = "$basedir.orig/$fn";
+ if ($opts{use_dev_null}) {
+ $label_old = $old_file if $old_file eq '/dev/null';
+ }
+ push @diff_files, [$fn, $mode, $size, $old_file, "$new/$fn",
+ $label_old, "$basedir/$fn"];
+ } elsif (-p _) {
+ unless (-p "$old/$fn") {
+ $self->_fail_not_same_type("$old/$fn", "$new/$fn", $fn);
+ }
+ } elsif (-b _ || -c _ || -S _) {
+ $self->_fail_with_msg("$new/$fn",
+ g_('device or socket is not allowed'));
+ } elsif (-d _) {
+ if (not lstat("$old/$fn")) {
+ if ($! != ENOENT) {
+ syserr(g_('cannot stat file %s'), "$old/$fn");
+ }
+ } elsif (not -d _) {
+ $self->_fail_not_same_type("$old/$fn", "$new/$fn", $fn);
+ }
+ } else {
+ $self->_fail_with_msg("$new/$fn", g_('unknown file type'));
+ }
+ };
+ my $scan_old = sub {
+ my $fn = (length > length($old)) ? substr($_, length($old) + 1) : '.';
+ return if $diff_ignore->($fn);
+ return if $files_in_new{$fn};
+ lstat("$old/$fn") or syserr(g_('cannot stat file %s'), "$old/$fn");
+ if (-f _) {
+ if (not defined $opts{include_removal}) {
+ warning(g_('ignoring deletion of file %s'), $fn);
+ } elsif (not $opts{include_removal}) {
+ warning(g_('ignoring deletion of file %s, use --include-removal to override'), $fn);
+ } else {
+ push @diff_files, [$fn, 0, 0, "$old/$fn", '/dev/null',
+ "$basedir.orig/$fn", '/dev/null'];
+ }
+ } elsif (-d _) {
+ warning(g_('ignoring deletion of directory %s'), $fn);
+ } elsif (-l _) {
+ warning(g_('ignoring deletion of symlink %s'), $fn);
+ } else {
+ $self->_fail_not_same_type("$old/$fn", "$new/$fn", $fn);
+ }
+ };
+
+ find({ wanted => $scan_new, no_chdir => 1 }, $new);
+ find({ wanted => $scan_old, no_chdir => 1 }, $old);
+
+ if ($opts{order_from} and -e $opts{order_from}) {
+ my $order_from = Dpkg::Source::Patch->new(
+ filename => $opts{order_from});
+ my $analysis = $order_from->analyze($basedir, verbose => 0);
+ my %patchorder;
+ my $i = 0;
+ foreach my $fn (@{$analysis->{patchorder}}) {
+ $fn =~ s{^[^/]+/}{};
+ $patchorder{$fn} = $i++;
+ }
+ # 'quilt refresh' sorts files as follows:
+ # - Any files in the existing patch come first, in the order in
+ # which they appear in the existing patch.
+ # - New files follow, sorted lexicographically.
+ # This seems a reasonable policy to follow, and avoids autopatches
+ # being shuffled when they are regenerated.
+ foreach my $diff_file (sort { $a->[0] cmp $b->[0] } @diff_files) {
+ my $fn = $diff_file->[0];
+ $patchorder{$fn} //= $i++;
+ }
+ @diff_files = sort { $patchorder{$a->[0]} <=> $patchorder{$b->[0]} }
+ @diff_files;
+ } else {
+ @diff_files = sort { $a->[0] cmp $b->[0] } @diff_files;
+ }
+
+ foreach my $diff_file (@diff_files) {
+ my ($fn, $mode, $size,
+ $old_file, $new_file, $label_old, $label_new) = @$diff_file;
+ my $success = $self->add_diff_file($old_file, $new_file,
+ filename => $fn,
+ label_old => $label_old,
+ label_new => $label_new, %opts);
+ if ($success and
+ $old_file eq '/dev/null' and $new_file ne '/dev/null') {
+ if (not $size) {
+ warning(g_("newly created empty file '%s' will not " .
+ 'be represented in diff'), $fn);
+ } else {
+ if ($mode & (S_IXUSR | S_IXGRP | S_IXOTH)) {
+ warning(g_("executable mode %04o of '%s' will " .
+ 'not be represented in diff'), $mode, $fn)
+ unless $fn eq 'debian/rules';
+ }
+ if ($mode & (S_ISUID | S_ISGID | S_ISVTX)) {
+ warning(g_("special mode %04o of '%s' will not " .
+ 'be represented in diff'), $mode, $fn);
+ }
+ }
+ }
+ }
+}
+
+sub finish {
+ my $self = shift;
+ close($self) or syserr(g_('cannot close %s'), $self->get_filename());
+ return not *$self->{errors};
+}
+
+sub register_error {
+ my $self = shift;
+ *$self->{errors}++;
+}
+sub _fail_with_msg {
+ my ($self, $file, $msg) = @_;
+ errormsg(g_('cannot represent change to %s: %s'), $file, $msg);
+ $self->register_error();
+}
+sub _fail_not_same_type {
+ my ($self, $old, $new, $file) = @_;
+ my $old_type = get_type($old);
+ my $new_type = get_type($new);
+ errormsg(g_('cannot represent change to %s:'), $file);
+ errormsg(g_(' new version is %s'), $new_type);
+ errormsg(g_(' old version is %s'), $old_type);
+ $self->register_error();
+}
+
+sub _getline {
+ my $handle = shift;
+
+ my $line = <$handle>;
+ if (defined $line) {
+ # Strip end-of-line chars
+ chomp($line);
+ $line =~ s/\r$//;
+ }
+ return $line;
+}
+
+# Fetch the header filename ignoring the optional timestamp
+sub _fetch_filename {
+ my ($diff, $header) = @_;
+
+ # Strip any leading spaces.
+ $header =~ s/^\s+//;
+
+ # Is it a C-style string?
+ if ($header =~ m/^"/) {
+ error(g_('diff %s patches file with C-style encoded filename'), $diff);
+ } else {
+ # Tab is the official separator, it's always used when
+ # filename contain spaces. Try it first, otherwise strip on space
+ # if there's no tab
+ $header =~ s/\s.*// unless $header =~ s/\t.*//;
+ }
+
+ return $header;
+}
+
+sub _intuit_file_patched {
+ my ($old, $new) = @_;
+
+ return $new unless defined $old;
+ return $old unless defined $new;
+ return $new if -e $new and not -e $old;
+ return $old if -e $old and not -e $new;
+
+ # We don't consider the case where both files are non-existent and
+ # where patch picks the one with the fewest directories to create
+ # since dpkg-source will pre-create the required directories
+
+ # Precalculate metrics used by patch
+ my ($tmp_o, $tmp_n) = ($old, $new);
+ my ($len_o, $len_n) = (length($old), length($new));
+ $tmp_o =~ s{[/\\]+}{/}g;
+ $tmp_n =~ s{[/\\]+}{/}g;
+ my $nb_comp_o = ($tmp_o =~ tr{/}{/});
+ my $nb_comp_n = ($tmp_n =~ tr{/}{/});
+ $tmp_o =~ s{^.*/}{};
+ $tmp_n =~ s{^.*/}{};
+ my ($blen_o, $blen_n) = (length($tmp_o), length($tmp_n));
+
+ # Decide like patch would
+ if ($nb_comp_o != $nb_comp_n) {
+ return ($nb_comp_o < $nb_comp_n) ? $old : $new;
+ } elsif ($blen_o != $blen_n) {
+ return ($blen_o < $blen_n) ? $old : $new;
+ } elsif ($len_o != $len_n) {
+ return ($len_o < $len_n) ? $old : $new;
+ }
+ return $old;
+}
+
+# check diff for sanity, find directories to create as a side effect
+sub analyze {
+ my ($self, $destdir, %opts) = @_;
+
+ $opts{verbose} //= 1;
+ my $diff = $self->get_filename();
+ my %filepatched;
+ my %dirtocreate;
+ my @patchorder;
+ my $patch_header = '';
+ my $diff_count = 0;
+
+ my $line = _getline($self);
+
+ HUNK:
+ while (defined $line or not eof $self) {
+ my (%path, %fn);
+
+ # Skip comments leading up to the patch (if any). Although we do not
+ # look for an Index: pseudo-header in the comments, because we would
+ # not use it anyway, as we require both ---/+++ filename headers.
+ while (1) {
+ if ($line =~ /^(?:--- |\+\+\+ |@@ -)/) {
+ last;
+ } else {
+ $patch_header .= "$line\n";
+ }
+ $line = _getline($self);
+ last HUNK if not defined $line;
+ }
+ $diff_count++;
+ # read file header (---/+++ pair)
+ unless ($line =~ s/^--- //) {
+ error(g_("expected ^--- in line %d of diff '%s'"), $., $diff);
+ }
+ $path{old} = $line = _fetch_filename($diff, $line);
+ if ($line ne '/dev/null' and $line =~ s{^[^/]*/+}{$destdir/}) {
+ $fn{old} = $line;
+ }
+ if ($line =~ /\.dpkg-orig$/) {
+ error(g_("diff '%s' patches file with name ending in .dpkg-orig"),
+ $diff);
+ }
+
+ $line = _getline($self);
+ unless (defined $line) {
+ error(g_("diff '%s' finishes in middle of ---/+++ (line %d)"),
+ $diff, $.);
+ }
+ unless ($line =~ s/^\+\+\+ //) {
+ error(g_("line after --- isn't as expected in diff '%s' (line %d)"),
+ $diff, $.);
+ }
+ $path{new} = $line = _fetch_filename($diff, $line);
+ if ($line ne '/dev/null' and $line =~ s{^[^/]*/+}{$destdir/}) {
+ $fn{new} = $line;
+ }
+
+ unless (defined $fn{old} or defined $fn{new}) {
+ error(g_("none of the filenames in ---/+++ are valid in diff '%s' (line %d)"),
+ $diff, $.);
+ }
+
+ # Safety checks on both filenames that patch could use
+ foreach my $key ('old', 'new') {
+ next unless defined $fn{$key};
+ if ($path{$key} =~ m{/\.\./}) {
+ error(g_('%s contains an insecure path: %s'), $diff, $path{$key});
+ }
+ my $path = $fn{$key};
+ while (1) {
+ if (-l $path) {
+ error(g_('diff %s modifies file %s through a symlink: %s'),
+ $diff, $fn{$key}, $path);
+ }
+ last unless $path =~ s{/+[^/]*$}{};
+ last if length($path) <= length($destdir); # $destdir is assumed safe
+ }
+ }
+
+ if ($path{old} eq '/dev/null' and $path{new} eq '/dev/null') {
+ error(g_("original and modified files are /dev/null in diff '%s' (line %d)"),
+ $diff, $.);
+ } elsif ($path{new} eq '/dev/null') {
+ error(g_("file removal without proper filename in diff '%s' (line %d)"),
+ $diff, $. - 1) unless defined $fn{old};
+ if ($opts{verbose}) {
+ warning(g_('diff %s removes a non-existing file %s (line %d)'),
+ $diff, $fn{old}, $.) unless -e $fn{old};
+ }
+ }
+ my $fn = _intuit_file_patched($fn{old}, $fn{new});
+
+ my $dirname = $fn;
+ if ($dirname =~ s{/[^/]+$}{} and not -d $dirname) {
+ $dirtocreate{$dirname} = 1;
+ }
+
+ if (-e $fn and not -f _) {
+ error(g_("diff '%s' patches something which is not a plain file"),
+ $diff);
+ }
+
+ if ($filepatched{$fn}) {
+ $filepatched{$fn}++;
+
+ if ($opts{fatal_dupes}) {
+ error(g_("diff '%s' patches files multiple times; split the " .
+ 'diff in multiple files or merge the hunks into a ' .
+ 'single one'), $diff);
+ } elsif ($opts{verbose} and $filepatched{$fn} == 2) {
+ warning(g_("diff '%s' patches file %s more than once"), $diff, $fn)
+ }
+ } else {
+ $filepatched{$fn} = 1;
+ push @patchorder, $fn;
+ }
+
+ # read hunks
+ my $hunk = 0;
+ while (defined($line = _getline($self))) {
+ # read hunk header (@@)
+ next if $line =~ /^\\ /;
+ last unless $line =~ /^@@ -\d+(,(\d+))? \+\d+(,(\d+))? @\@(?: .*)?$/;
+ my ($olines, $nlines) = ($1 ? $2 : 1, $3 ? $4 : 1);
+ # read hunk
+ while ($olines || $nlines) {
+ unless (defined($line = _getline($self))) {
+ if (($olines == $nlines) and ($olines < 3)) {
+ warning(g_("unexpected end of diff '%s'"), $diff)
+ if $opts{verbose};
+ last;
+ } else {
+ error(g_("unexpected end of diff '%s'"), $diff);
+ }
+ }
+ next if $line =~ /^\\ /;
+ # Check stats
+ if ($line =~ /^ / or length $line == 0) {
+ --$olines;
+ --$nlines;
+ } elsif ($line =~ /^-/) {
+ --$olines;
+ } elsif ($line =~ /^\+/) {
+ --$nlines;
+ } else {
+ error(g_("expected [ +-] at start of line %d of diff '%s'"),
+ $., $diff);
+ }
+ }
+ $hunk++;
+ }
+ unless ($hunk) {
+ error(g_("expected ^\@\@ at line %d of diff '%s'"), $., $diff);
+ }
+ }
+ close($self);
+ unless ($diff_count) {
+ warning(g_("diff '%s' doesn't contain any patch"), $diff)
+ if $opts{verbose};
+ }
+ *$self->{analysis}{$destdir}{dirtocreate} = \%dirtocreate;
+ *$self->{analysis}{$destdir}{filepatched} = \%filepatched;
+ *$self->{analysis}{$destdir}{patchorder} = \@patchorder;
+ *$self->{analysis}{$destdir}{patchheader} = $patch_header;
+ return *$self->{analysis}{$destdir};
+}
+
+sub prepare_apply {
+ my ($self, $analysis, %opts) = @_;
+ if ($opts{create_dirs}) {
+ foreach my $dir (keys %{$analysis->{dirtocreate}}) {
+ eval { make_path($dir, { mode => 0777 }) };
+ syserr(g_('cannot create directory %s'), $dir) if $@;
+ }
+ }
+}
+
+sub apply {
+ my ($self, $destdir, %opts) = @_;
+ # Set default values to options
+ $opts{force_timestamp} //= 1;
+ $opts{remove_backup} //= 1;
+ $opts{create_dirs} //= 1;
+ $opts{options} ||= [ '-t', '-F', '0', '-N', '-p1', '-u',
+ '-V', 'never', '-b', '-z', '.dpkg-orig'];
+ $opts{add_options} //= [];
+ push @{$opts{options}}, @{$opts{add_options}};
+ # Check the diff and create missing directories
+ my $analysis = $self->analyze($destdir, %opts);
+ $self->prepare_apply($analysis, %opts);
+ # Apply the patch
+ $self->ensure_open('r');
+ my ($stdout, $stderr) = ('', '');
+ spawn(
+ exec => [ $Dpkg::PROGPATCH, @{$opts{options}} ],
+ chdir => $destdir,
+ env => { LC_ALL => 'C', LANG => 'C', PATCH_GET => '0' },
+ delete_env => [ 'POSIXLY_CORRECT' ], # ensure expected patch behaviour
+ wait_child => 1,
+ nocheck => 1,
+ from_handle => $self->get_filehandle(),
+ to_string => \$stdout,
+ error_to_string => \$stderr,
+ );
+ if ($?) {
+ print { *STDOUT } $stdout;
+ print { *STDERR } $stderr;
+ subprocerr("LC_ALL=C $Dpkg::PROGPATCH " . join(' ', @{$opts{options}}) .
+ ' < ' . $self->get_filename());
+ }
+ $self->close();
+ # Reset the timestamp of all the patched files
+ # and remove .dpkg-orig files
+ my @files = keys %{$analysis->{filepatched}};
+ my $now = $opts{timestamp};
+ $now //= fs_time($files[0]) if $opts{force_timestamp} && scalar @files;
+ foreach my $fn (@files) {
+ if ($opts{force_timestamp}) {
+ utime($now, $now, $fn) or $! == ENOENT
+ or syserr(g_('cannot change timestamp for %s'), $fn);
+ }
+ if ($opts{remove_backup}) {
+ $fn .= '.dpkg-orig';
+ unlink($fn) or syserr(g_('remove patch backup file %s'), $fn);
+ }
+ }
+ return $analysis;
+}
+
+# Verify if check will work...
+sub check_apply {
+ my ($self, $destdir, %opts) = @_;
+ # Set default values to options
+ $opts{create_dirs} //= 1;
+ $opts{options} ||= [ '--dry-run', '-s', '-t', '-F', '0', '-N', '-p1', '-u',
+ '-V', 'never', '-b', '-z', '.dpkg-orig'];
+ $opts{add_options} //= [];
+ push @{$opts{options}}, @{$opts{add_options}};
+ # Check the diff and create missing directories
+ my $analysis = $self->analyze($destdir, %opts);
+ $self->prepare_apply($analysis, %opts);
+ # Apply the patch
+ $self->ensure_open('r');
+ my $patch_pid = spawn(
+ exec => [ $Dpkg::PROGPATCH, @{$opts{options}} ],
+ chdir => $destdir,
+ env => { LC_ALL => 'C', LANG => 'C', PATCH_GET => '0' },
+ delete_env => [ 'POSIXLY_CORRECT' ], # ensure expected patch behaviour
+ from_handle => $self->get_filehandle(),
+ to_file => '/dev/null',
+ error_to_file => '/dev/null',
+ );
+ wait_child($patch_pid, nocheck => 1);
+ my $exit = WEXITSTATUS($?);
+ subprocerr("$Dpkg::PROGPATCH --dry-run") unless WIFEXITED($?);
+ $self->close();
+ return ($exit == 0);
+}
+
+# Helper functions
+sub get_type {
+ my $file = shift;
+ if (not lstat($file)) {
+ return g_('nonexistent') if $! == ENOENT;
+ syserr(g_('cannot stat %s'), $file);
+ } else {
+ -f _ && return g_('plain file');
+ -d _ && return g_('directory');
+ -l _ && return sprintf(g_('symlink to %s'), readlink($file));
+ -b _ && return g_('block device');
+ -c _ && return g_('character device');
+ -p _ && return g_('named pipe');
+ -S _ && return g_('named socket');
+ }
+}
+
+1;