1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
|
#!/usr/bin/perl
#
# dpkg-shlibdeps
#
# Copyright © 1996 Ian Jackson
# Copyright © 2000 Wichert Akkerman
# Copyright © 2006 Frank Lichtenheld
# Copyright © 2006-2010,2012-2015 Guillem Jover <guillem@debian.org>
# Copyright © 2007, 2016 Raphaël Hertzog <hertzog@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 strict;
use warnings;
use feature qw(state);
use List::Util qw(any none);
use Cwd qw(realpath);
use File::Basename qw(dirname);
use Dpkg ();
use Dpkg::Gettext;
use Dpkg::ErrorHandling;
use Dpkg::Path qw(relative_to_pkg_root guess_pkg_root_dir
check_files_are_the_same get_control_path);
use Dpkg::Version;
use Dpkg::Shlibs qw(find_library get_library_paths);
use Dpkg::Shlibs::Objdump;
use Dpkg::Shlibs::SymbolFile;
use Dpkg::Substvars;
use Dpkg::Arch qw(get_host_arch);
use Dpkg::Deps;
use Dpkg::Control::Info;
use Dpkg::Control::Fields;
use constant {
WARN_SYM_NOT_FOUND => 1,
WARN_DEP_AVOIDABLE => 2,
WARN_NOT_NEEDED => 4,
};
# By increasing importance
my @depfields = qw(Suggests Recommends Depends Pre-Depends);
my $i = 0; my %depstrength = map { $_ => $i++ } @depfields;
textdomain('dpkg-dev');
my $admindir = $Dpkg::ADMINDIR;
my $shlibsoverride = "$Dpkg::CONFDIR/shlibs.override";
my $shlibsdefault = "$Dpkg::CONFDIR/shlibs.default";
my $shlibslocal = 'debian/shlibs.local';
my $packagetype = 'deb';
my $dependencyfield = 'Depends';
my $varlistfile = 'debian/substvars';
my $varlistfilenew;
my $varnameprefix = 'shlibs';
my $ignore_missing_info = 0;
my $warnings = WARN_SYM_NOT_FOUND | WARN_DEP_AVOIDABLE;
my $debug = 0;
my @exclude = ();
my @pkg_dir_to_search = ();
my @pkg_dir_to_ignore = ();
my $host_arch = get_host_arch();
my (@pkg_shlibs, @pkg_symbols, @pkg_root_dirs);
my ($stdout, %exec);
foreach (@ARGV) {
if (m/^-T(.*)$/) {
$varlistfile = $1;
} elsif (m/^-p(\w[-:0-9A-Za-z]*)$/) {
$varnameprefix = $1;
} elsif (m/^-L(.*)$/) {
$shlibslocal = $1;
} elsif (m/^-l(.*)$/) {
Dpkg::Shlibs::add_library_dir($1);
} elsif (m/^-S(.*)$/) {
push @pkg_dir_to_search, $1;
} elsif (m/^-I(.*)$/) {
push @pkg_dir_to_ignore, $1;
} elsif (m/^-O$/) {
$stdout = 1;
} elsif (m/^-O(.+)$/) {
$varlistfile = $1;
} elsif (m/^-(?:\?|-help)$/) {
usage(); exit(0);
} elsif (m/^--version$/) {
version(); exit(0);
} elsif (m/^--admindir=(.*)$/) {
$admindir = $1;
if (not -d $admindir) {
error(g_("administrative directory '%s' does not exist"), $admindir);
}
$ENV{DPKG_ADMINDIR} = $admindir;
} elsif (m/^-d(.*)$/) {
$dependencyfield = field_capitalize($1);
if (not defined $depstrength{$dependencyfield}) {
warning(g_("unrecognized dependency field '%s'"), $dependencyfield);
}
} elsif (m/^-e(.*)$/) {
if (exists $exec{$1}) {
# Affect the binary to the most important field
if ($depstrength{$dependencyfield} > $depstrength{$exec{$1}}) {
$exec{$1} = $dependencyfield;
}
} else {
$exec{$1} = $dependencyfield;
}
} elsif (m/^--ignore-missing-info$/) {
$ignore_missing_info = 1;
} elsif (m/^--warnings=(\d+)$/) {
$warnings = $1;
} elsif (m/^-t(.*)$/) {
$packagetype = $1;
} elsif (m/^-v$/) {
$debug++;
} elsif (m/^-x(.*)$/) {
push @exclude, $1;
} elsif (m/^-/) {
usageerr(g_("unknown option '%s'"), $_);
} else {
if (exists $exec{$_}) {
# Affect the binary to the most important field
if ($depstrength{$dependencyfield} > $depstrength{$exec{$_}}) {
$exec{$_} = $dependencyfield;
}
} else {
$exec{$_} = $dependencyfield;
}
}
}
usageerr(g_('need at least one executable')) unless scalar keys %exec;
report_options(debug_level => $debug);
sub ignore_pkgdir {
my $path = shift;
return any { $path =~ /^\Q$_\E/ } @pkg_dir_to_ignore;
}
if (-d 'debian') {
push @pkg_symbols, grep { !ignore_pkgdir($_) } glob 'debian/*/DEBIAN/symbols';
push @pkg_shlibs, grep { !ignore_pkgdir($_) } glob 'debian/*/DEBIAN/shlibs';
my %uniq = map { guess_pkg_root_dir($_) => 1 } (@pkg_symbols, @pkg_shlibs);
push @pkg_root_dirs, keys %uniq;
}
my $control = Dpkg::Control::Info->new();
my $fields = $control->get_source();
my $bd_value = deps_concat($fields->{'Build-Depends'}, $fields->{'Build-Depends-Arch'});
my $build_deps = deps_parse($bd_value, build_dep => 1, reduce_restrictions => 1);
error(g_('error occurred while parsing %s'), 'Build-Depends/Build-Depends-Arch')
unless defined $build_deps;
my %dependencies;
# Statistics on soname seen in the whole run (with multiple analysis of
# binaries)
my %global_soname_notfound;
my %global_soname_used;
my %global_soname_needed;
# Symfile and objdump caches
my %symfile_cache;
my %objdump_cache;
my %symfile_has_soname_cache;
# Used to count errors due to missing libraries
my $error_count = 0;
my $cur_field;
foreach my $file (keys %exec) {
$cur_field = $exec{$file};
debug(1, ">> Scanning $file (for $cur_field field)");
my $obj = Dpkg::Shlibs::Objdump::Object->new($file);
my @sonames = $obj->get_needed_libraries;
# Load symbols files for all needed libraries (identified by SONAME)
my %libfiles;
my %altlibfiles;
my %soname_libs;
my %soname_notfound;
my %alt_soname;
foreach my $soname (@sonames) {
my @libs = my_find_library($soname, $obj->{RPATH}, $obj->{exec_abi}, $file);
unless (scalar @libs) {
$soname_notfound{$soname} = 1;
$global_soname_notfound{$soname} = 1;
my $msg = g_('cannot find library %s needed by %s (ELF ' .
"format: '%s' abi: '%s'; RPATH: '%s')");
my $exec_abi = unpack 'H*', $obj->{exec_abi};
if (scalar(split_soname($soname))) {
errormsg($msg, $soname, $file, $obj->{format}, $exec_abi, join(':', @{$obj->{RPATH}}));
$error_count++;
} else {
warning($msg, $soname, $file, $obj->{format}, $exec_abi, join(':', @{$obj->{RPATH}}));
}
next;
}
# Track shared libraries for a given SONAME.
push @{$soname_libs{$soname}}, @libs;
# Track shared libraries for package mapping.
foreach my $lib (@libs) {
$libfiles{$lib} = $soname;
my $reallib = realpath($lib);
if ($reallib ne $lib) {
$altlibfiles{$reallib} = $soname;
}
debug(1, "Library $soname found in $lib");
}
}
my $file2pkg = find_packages(keys %libfiles, keys %altlibfiles);
my $symfile = Dpkg::Shlibs::SymbolFile->new();
my $dumplibs_wo_symfile = Dpkg::Shlibs::Objdump->new();
my @soname_wo_symfile;
SONAME: foreach my $soname (@sonames) {
# Select the first good entry from the ordered list that we got from
# find_library(), and skip to the next SONAME.
foreach my $lib (@{$soname_libs{$soname}}) {
if (none { $_ ne '' } @{$file2pkg->{$lib}}) {
# The path of the library as calculated is not the
# official path of a packaged file, try to fallback on
# on the realpath() first, maybe this one is part of a package
my $reallib = realpath($lib);
if (exists $file2pkg->{$reallib}) {
$file2pkg->{$lib} = $file2pkg->{$reallib};
}
}
if (none { $_ ne '' } @{$file2pkg->{$lib}}) {
# If the library is really not available in an installed package,
# it's because it's in the process of being built
# Empty package name will lead to consideration of symbols
# file from the package being built only
$file2pkg->{$lib} = [''];
debug(1, "No associated package found for $lib");
}
# Load symbols/shlibs files from packages providing libraries
my $missing_wanted_shlibs_info = 0;
foreach my $pkg (@{$file2pkg->{$lib}}) {
my $symfile_path;
my $haslocaldep = 0;
if (-e $shlibslocal and
defined(extract_from_shlibs($soname, $shlibslocal)))
{
$haslocaldep = 1;
}
if ($packagetype eq 'deb' and not $haslocaldep) {
# Use fine-grained dependencies only on real deb
# and only if the dependency is not provided by shlibs.local
$symfile_path = find_symbols_file($pkg, $soname, $lib);
}
if (defined($symfile_path)) {
# Load symbol information
debug(1, "Using symbols file $symfile_path for $soname");
$symfile_cache{$symfile_path} //=
Dpkg::Shlibs::SymbolFile->new(file => $symfile_path);
$symfile->merge_object_from_symfile($symfile_cache{$symfile_path}, $soname);
}
if (defined($symfile_path) && $symfile->has_object($soname)) {
# Initialize dependencies with the smallest minimal version
# of all symbols (unversioned dependency is not ok as the
# library might not have always been available in the
# package and we really need it)
my $dep = $symfile->get_dependency($soname);
my $minver = $symfile->get_smallest_version($soname) || '';
update_dependency_version($dep, $minver);
debug(2, " Minimal version of ($dep) initialized with ($minver)");
# Found a symbols file for the SONAME.
next SONAME;
} else {
# No symbol file found, fall back to standard shlibs
debug(1, "Using shlibs+objdump for $soname (file $lib)");
$objdump_cache{$lib} //= Dpkg::Shlibs::Objdump::Object->new($lib);
my $libobj = $objdump_cache{$lib};
my $id = $dumplibs_wo_symfile->add_object($libobj);
if (($id ne $soname) and ($id ne $lib)) {
warning(g_('%s has an unexpected SONAME (%s)'), $lib, $id);
$alt_soname{$id} = $soname;
}
push @soname_wo_symfile, $soname;
# Only try to generate a dependency for libraries with a SONAME
if (not $libobj->is_public_library()) {
debug(1, "Skipping shlibs+objdump info for private library $lib");
next;
}
# If we found a shlibs file for the SONAME, skip to the next.
next SONAME if add_shlibs_dep($soname, $pkg, $lib);
$missing_wanted_shlibs_info = 1;
debug(1, "No shlibs+objdump info available, trying next package for $lib");
}
}
next if not $missing_wanted_shlibs_info;
# We will only reach this point, if we have found no symbols nor
# shlibs files for the given SONAME.
# This failure is fairly new, try to be kind by
# ignoring as many cases that can be safely ignored
my $ignore = 0;
# 1/ when the lib and the binary are in the same
# package
my $root_file = guess_pkg_root_dir($file);
my $root_lib = guess_pkg_root_dir($lib);
$ignore++ if defined $root_file and defined $root_lib
and check_files_are_the_same($root_file, $root_lib);
# 2/ when the lib is not versioned and can't be
# handled by shlibs
$ignore++ unless scalar split_soname($soname);
# 3/ when we have been asked to do so
$ignore++ if $ignore_missing_info;
error(g_('no dependency information found for %s ' .
"(used by %s)\n" .
'Hint: check if the library actually comes ' .
'from a package.'), $lib, $file)
unless $ignore;
}
}
# Scan all undefined symbols of the binary and resolve to a
# dependency
my %soname_used;
foreach my $soname (@sonames) {
# Initialize statistics
$soname_used{$soname} = 0;
$global_soname_used{$soname} //= 0;
if (exists $global_soname_needed{$soname}) {
push @{$global_soname_needed{$soname}}, $file;
} else {
$global_soname_needed{$soname} = [ $file ];
}
}
my $nb_warnings = 0;
my $nb_skipped_warnings = 0;
# Disable warnings about missing symbols when we have not been able to
# find all libs
my $disable_warnings = scalar(keys(%soname_notfound));
my $in_public_dir = 1;
if (my $relname = relative_to_pkg_root($file)) {
my $parent_dir = '/' . dirname($relname);
$in_public_dir = any { $parent_dir eq $_ } get_library_paths();
} else {
warning(g_('binaries to analyze should already be ' .
"installed in their package's directory"));
}
debug(2, 'Analyzing all undefined symbols');
foreach my $sym ($obj->get_undefined_dynamic_symbols()) {
my $name = $sym->{name};
if ($sym->{version}) {
$name .= '@' . "$sym->{version}";
} else {
$name .= '@' . 'Base';
}
debug(2, " Looking up symbol $name");
my %symdep = $symfile->lookup_symbol($name, \@sonames);
if (keys %symdep) {
my $depends = $symfile->get_dependency($symdep{soname},
$symdep{symbol}{dep_id});
debug(2, " Found in symbols file of $symdep{soname} (minver: " .
"$symdep{symbol}{minver}, dep: $depends)");
$soname_used{$symdep{soname}}++;
$global_soname_used{$symdep{soname}}++;
if (exists $alt_soname{$symdep{soname}}) {
# Also count usage on alternate soname
$soname_used{$alt_soname{$symdep{soname}}}++;
$global_soname_used{$alt_soname{$symdep{soname}}}++;
}
update_dependency_version($depends, $symdep{symbol}{minver});
} else {
my $syminfo = $dumplibs_wo_symfile->locate_symbol($name);
if (not defined($syminfo)) {
debug(2, ' Not found');
next unless ($warnings & WARN_SYM_NOT_FOUND);
next if $disable_warnings;
# Complain about missing symbols only for executables
# and public libraries
if ($obj->is_executable() or $obj->is_public_library()) {
my $print_name = $name;
# Drop the default suffix for readability
$print_name =~ s/\@Base$//;
unless ($sym->{weak}) {
if ($debug or ($in_public_dir and $nb_warnings < 10)
or (not $in_public_dir and $nb_warnings < 1))
{
if ($in_public_dir) {
warning(g_('symbol %s used by %s found in none of the ' .
'libraries'), $print_name, $file);
} else {
warning(g_('%s contains an unresolvable reference to ' .
"symbol %s: it's probably a plugin"),
$file, $print_name);
}
$nb_warnings++;
} else {
$nb_skipped_warnings++;
}
}
}
} else {
debug(2, " Found in $syminfo->{soname} ($syminfo->{objid})");
if (exists $alt_soname{$syminfo->{soname}}) {
# Also count usage on alternate soname
$soname_used{$alt_soname{$syminfo->{soname}}}++;
$global_soname_used{$alt_soname{$syminfo->{soname}}}++;
}
$soname_used{$syminfo->{soname}}++;
$global_soname_used{$syminfo->{soname}}++;
}
}
}
warning(P_('%d similar warning has been skipped (use -v to see it)',
'%d other similar warnings have been skipped (use -v to see ' .
'them all)', $nb_skipped_warnings), $nb_skipped_warnings)
if $nb_skipped_warnings;
foreach my $soname (@sonames) {
# Adjust minimal version of dependencies with information
# extracted from build-dependencies
my $dev_pkg = $symfile->get_field($soname, 'Build-Depends-Package');
if (defined $dev_pkg) {
debug(1, "Updating dependencies of $soname with build-dependencies");
my $minver = get_min_version_from_deps($build_deps, $dev_pkg);
if (defined $minver) {
foreach my $dep ($symfile->get_dependencies($soname)) {
update_dependency_version($dep, $minver, 1);
debug(1, " Minimal version of $dep updated with $minver");
}
} else {
debug(1, " No minimal version found in $dev_pkg build-dependency");
}
}
# Warn about un-NEEDED libraries
unless ($soname_notfound{$soname} or $soname_used{$soname}) {
# Ignore warning for libm.so.6 if also linked against libstdc++
next if ($soname =~ /^libm\.so\.\d+$/ and
any { m/^libstdc\+\+\.so\.\d+/ } @sonames);
next unless ($warnings & WARN_NOT_NEEDED);
warning(g_('%s should not be linked against %s (it uses none of ' .
"the library's symbols)"), $file, $soname);
}
}
}
# Warn of unneeded libraries at the "package" level (i.e. over all
# binaries that we have inspected)
foreach my $soname (keys %global_soname_needed) {
unless ($global_soname_notfound{$soname} or $global_soname_used{$soname}) {
next if ($soname =~ /^libm\.so\.\d+$/ and
any { m/^libstdc\+\+\.so\.\d+/ } keys %global_soname_needed);
next unless ($warnings & WARN_DEP_AVOIDABLE);
warning(P_('package could avoid a useless dependency if %s was not ' .
"linked against %s (it uses none of the library's symbols)",
'package could avoid a useless dependency if %s were not ' .
"linked against %s (they use none of the library's symbols)",
scalar @{$global_soname_needed{$soname}}),
join(' ', @{$global_soname_needed{$soname}}), $soname);
}
}
# Quit now if any missing libraries
if ($error_count >= 1) {
my $note = g_('Note: libraries are not searched in other binary packages ' .
"that do not have any shlibs or symbols file.\nTo help dpkg-shlibdeps " .
'find private libraries, you might need to use -l.');
error(P_('cannot continue due to the error above',
'cannot continue due to the errors listed above',
$error_count) . "\n" . $note);
}
# Open substvars file
my $substvars = Dpkg::Substvars->new();
if ($stdout) {
$varlistfilenew = '-';
} else {
$substvars->load($varlistfile) if -e $varlistfile;
$substvars->filter(remove => sub { $_[0] =~ m/^\Q$varnameprefix\E:/ });
$varlistfilenew = "$varlistfile.new";
}
# Write out the shlibs substvars
my %depseen;
sub filter_deps {
my ($dep, $field) = @_;
# Skip dependencies on excluded packages
foreach my $exc (@exclude) {
return 0 if $dep =~ /^\s*\Q$exc\E\b/;
}
# Don't include dependencies if they are already
# mentioned in a higher priority field
if (not exists($depseen{$dep})) {
$depseen{$dep} = $dependencies{$field}{$dep};
return 1;
} else {
# Since dependencies can be versioned, we have to
# verify if the dependency is stronger than the
# previously seen one
my $stronger;
if ($depseen{$dep} eq $dependencies{$field}{$dep}) {
# If both versions are the same (possibly unversioned)
$stronger = 0;
} elsif ($dependencies{$field}{$dep} eq '') {
$stronger = 0; # If the dep is unversioned
} elsif ($depseen{$dep} eq '') {
$stronger = 1; # If the dep seen is unversioned
} elsif (version_compare_relation($depseen{$dep}, REL_GT,
$dependencies{$field}{$dep})) {
# The version of the dep seen is stronger...
$stronger = 0;
} else {
$stronger = 1;
}
$depseen{$dep} = $dependencies{$field}{$dep} if $stronger;
return $stronger;
}
}
foreach my $field (reverse @depfields) {
my $dep = '';
if (exists $dependencies{$field} and scalar keys %{$dependencies{$field}}) {
$dep = join ', ',
map {
# Translate dependency templates into real dependencies
my $templ = $_;
if ($dependencies{$field}{$templ}->is_valid() and
$dependencies{$field}{$templ}->as_string()) {
$templ =~ s/#MINVER#/(>= $dependencies{$field}{$templ})/g;
} else {
$templ =~ s/#MINVER#//g;
}
$templ =~ s/\s+/ /g;
$templ;
} grep {
filter_deps($_, $field)
} keys %{$dependencies{$field}};
}
if ($dep) {
my $obj = deps_parse($dep);
error(g_('invalid dependency got generated: %s'), $dep) unless defined $obj;
$obj->sort();
$substvars->set_as_used("$varnameprefix:$field", "$obj");
}
}
$substvars->save($varlistfilenew);
# Replace old file by new one
if (!$stdout) {
rename $varlistfilenew, $varlistfile
or syserr(g_("install new varlist file '%s'"), $varlistfile);
}
##
## Functions
##
sub version {
printf g_("Debian %s version %s.\n"), $Dpkg::PROGNAME, $Dpkg::PROGVERSION;
printf g_('
This is free software; see the GNU General Public License version 2 or
later for copying conditions. There is NO warranty.
');
}
sub usage {
printf g_(
'Usage: %s [<option>...] <executable>|-e<executable> [<option>...]')
. "\n\n" . g_(
"Positional options (order is significant):
<executable> include dependencies for <executable>,
-e<executable> (use -e if <executable> starts with '-')
-d<dependency-field> next executable(s) set shlibs:<dependency-field>.")
. "\n\n" . g_(
"Options:
-l<library-dir> add directory to private shared library search list.
-p<varname-prefix> set <varname-prefix>:* instead of shlibs:*.
-O[<file>] write variable settings to stdout (or <file>).
-L<local-shlibs-file> shlibs override file, not debian/shlibs.local.
-T<substvars-file> update variables here, not debian/substvars.
-t<type> set package type (default is deb).
-x<package> exclude package from the generated dependencies.
-S<package-build-dir> search needed libraries in the given
package build directory first.
-I<package-build-dir> ignore needed libraries, shlibs and symbols files
in the given build directory.
-v enable verbose mode (can be used multiple times).
--ignore-missing-info don't fail if dependency information can't be found.
--warnings=<value> define set of active warnings (see manual page).
--admindir=<directory> change the administrative directory.
-?, --help show this help message.
--version show the version.")
. "\n\n" . g_(
'Dependency fields recognized are:
%s
'), $Dpkg::PROGNAME, join('/', @depfields);
}
sub get_min_version_from_deps {
my ($dep, $pkg) = @_;
if ($dep->isa('Dpkg::Deps::Simple')) {
if (($dep->{package} eq $pkg) &&
defined($dep->{relation}) &&
(($dep->{relation} eq REL_GE) ||
($dep->{relation} eq REL_GT)))
{
return $dep->{version};
}
return;
} else {
my $res;
foreach my $subdep ($dep->get_deps()) {
my $minver = get_min_version_from_deps($subdep, $pkg);
next if not defined $minver;
if (defined $res) {
if (version_compare_relation($minver, REL_GT, $res)) {
$res = $minver;
}
} else {
$res = $minver;
}
}
return $res;
}
}
sub update_dependency_version {
my ($dep, $minver, $existing_only) = @_;
return if not defined($minver);
$minver = Dpkg::Version->new($minver);
foreach my $subdep (split /\s*,\s*/, $dep) {
if (exists $dependencies{$cur_field}{$subdep} and
defined($dependencies{$cur_field}{$subdep}))
{
if ($dependencies{$cur_field}{$subdep} eq '' or $minver ne '' and
version_compare_relation($minver, REL_GT,
$dependencies{$cur_field}{$subdep}))
{
$dependencies{$cur_field}{$subdep} = $minver;
}
} elsif (!$existing_only) {
$dependencies{$cur_field}{$subdep} = $minver;
}
}
}
sub add_shlibs_dep {
my ($soname, $pkg, $libfile) = @_;
my @shlibs = ($shlibslocal, $shlibsoverride);
if ($pkg eq '') {
# If the file is not packaged, try to find out the shlibs file in
# the package being built where the lib has been found
my $pkg_root = guess_pkg_root_dir($libfile);
if (defined $pkg_root) {
push @shlibs, "$pkg_root/DEBIAN/shlibs";
}
# Fallback to other shlibs files but it shouldn't be necessary
push @shlibs, @pkg_shlibs;
} else {
my $control_file = get_control_path($pkg, 'shlibs');
push @shlibs, $control_file if defined $control_file;
}
push @shlibs, $shlibsdefault;
debug(1, " Looking up shlibs dependency of $soname provided by '$pkg'");
foreach my $file (@shlibs) {
next if not -e $file;
my $dep = extract_from_shlibs($soname, $file);
if (defined($dep)) {
debug(1, " Found $dep in $file");
foreach (split(/,\s*/, $dep)) {
# Note: the value is empty for shlibs based dependency
# symbol based dependency will put a valid version as value
$dependencies{$cur_field}{$_} = Dpkg::Version->new('');
}
return 1;
}
}
debug(1, ' Found nothing');
return 0;
}
sub split_soname {
my $soname = shift;
if ($soname =~ /^(.*)\.so\.(.*)$/) {
return wantarray ? ($1, $2) : 1;
} elsif ($soname =~ /^(.*)-(\d.*)\.so$/) {
return wantarray ? ($1, $2) : 1;
} else {
return wantarray ? () : 0;
}
}
sub extract_from_shlibs {
my ($soname, $shlibfile) = @_;
my $shlibs_re = qr{
^\s*
(?:(\S+):\s+)? # Optional type
(\S+)\s+ # Library
(\S+) # Version
(?:
\s+
(\S.*\S) # Dependencies
)?
\s*$
}x;
# Split soname in name/version
my ($libname, $libversion) = split_soname($soname);
unless (defined $libname) {
warning(g_("can't extract name and version from library name '%s'"),
$soname);
return;
}
# Open shlibs file
open(my $shlibs_fh, '<', $shlibfile)
or syserr(g_("unable to open shared libs info file '%s'"), $shlibfile);
my $dep;
while (<$shlibs_fh>) {
s/\s*\n$//;
next if m/^\#/;
if (!m/$shlibs_re/) {
warning(g_("shared libs info file '%s' line %d: bad line '%s'"),
$shlibfile, $., $_);
next;
}
my $depread = $4 // '';
if (($libname eq $2) && ($libversion eq $3)) {
# Define dep and end here if the package type explicitly
# matches. Otherwise if the packagetype is not specified, use
# the dep only as a default that can be overridden by a later
# line
if (defined($1)) {
if ($1 eq $packagetype) {
$dep = $depread;
last;
}
} else {
$dep //= $depread;
}
}
}
close($shlibs_fh);
return $dep;
}
sub find_symbols_file {
my ($pkg, $soname, $libfile) = @_;
my @files;
if ($pkg eq '') {
# If the file is not packaged, try to find out the symbols file in
# the package being built where the lib has been found
my $pkg_root = guess_pkg_root_dir($libfile);
if (defined $pkg_root) {
push @files, "$pkg_root/DEBIAN/symbols";
}
# Fallback to other symbols files but it shouldn't be necessary
push @files, @pkg_symbols;
} else {
push @files, "$Dpkg::CONFDIR/symbols/$pkg.symbols.$host_arch",
"$Dpkg::CONFDIR/symbols/$pkg.symbols";
state %control_file_cache;
if (not exists $control_file_cache{$pkg}) {
$control_file_cache{$pkg} = get_control_path($pkg, 'symbols');
}
my $control_file = $control_file_cache{$pkg};
push @files, $control_file if defined $control_file;
}
foreach my $file (@files) {
if (-e $file and symfile_has_soname($file, $soname)) {
return $file;
}
}
return;
}
sub symfile_has_soname {
my ($file, $soname) = @_;
if (exists $symfile_has_soname_cache{$file}{$soname}) {
return $symfile_has_soname_cache{$file}{$soname};
}
open(my $symfile_fh, '<', $file)
or syserr(g_('cannot open file %s'), $file);
my $result = 0;
while (<$symfile_fh>) {
if (/^\Q$soname\E /) {
$result = 1;
last;
}
}
close($symfile_fh);
$symfile_has_soname_cache{$file}{$soname} = $result;
return $result;
}
# find_library ($soname, \@rpath, $format)
sub my_find_library {
my ($lib, $rpath, $format, $execfile) = @_;
# Create real RPATH in case $ORIGIN is used
# Note: ld.so also supports $PLATFORM and $LIB but they are
# used in real case (yet)
my $libdir = relative_to_pkg_root($execfile);
my $origin;
if (defined $libdir) {
$origin = "/$libdir";
$origin =~ s{/+[^/]*$}{};
}
my @RPATH = ();
foreach my $path (@{$rpath}) {
if ($path =~ /\$ORIGIN|\$\{ORIGIN\}/) {
if (defined $origin) {
$path =~ s/\$ORIGIN/$origin/g;
$path =~ s/\$\{ORIGIN\}/$origin/g;
} else {
warning(g_('$ORIGIN is used in RPATH of %s and the corresponding ' .
'directory could not be identified due to lack of DEBIAN ' .
"sub-directory in the root of package's build tree"), $execfile);
}
}
push @RPATH, $path;
}
# Look into the packages we're currently building in the following
# order:
# - package build tree of the binary which is analyzed
# - package build tree given on the command line (option -S)
# - other package build trees that contain either a shlibs or a
# symbols file
# But ignore:
# - package build tree given on the command line (option -I)
my @builddirs;
my $pkg_root = guess_pkg_root_dir($execfile);
push @builddirs, $pkg_root if defined $pkg_root;
push @builddirs, @pkg_dir_to_search;
push @builddirs, @pkg_root_dirs;
my %dir_checked;
foreach my $builddir (@builddirs) {
next if defined($dir_checked{$builddir});
next if ignore_pkgdir($builddir);
my @libs = find_library($lib, \@RPATH, $format, $builddir);
return @libs if scalar @libs;
$dir_checked{$builddir} = 1;
}
# Fallback in the root directory if we have not found what we were
# looking for in the packages
return find_library($lib, \@RPATH, $format, '');
}
my %cached_pkgmatch = ();
sub find_packages {
my @files;
my $pkgmatch = {};
foreach my $path (@_) {
if (exists $cached_pkgmatch{$path}) {
$pkgmatch->{$path} = $cached_pkgmatch{$path};
} else {
push @files, $path;
$cached_pkgmatch{$path} = ['']; # placeholder to cache misses too.
$pkgmatch->{$path} = ['']; # might be replaced later on
}
}
return $pkgmatch unless scalar(@files);
my $pid = open(my $dpkg_fh, '-|');
syserr(g_('cannot fork for %s'), 'dpkg-query --search') unless defined $pid;
if (!$pid) {
# Child process running dpkg --search and discarding errors
close STDERR;
open STDERR, '>', '/dev/null'
or syserr(g_('cannot open file %s'), '/dev/null');
$ENV{LC_ALL} = 'C';
exec 'dpkg-query', '--search', '--', @files
or syserr(g_('unable to execute %s'), 'dpkg');
}
while (<$dpkg_fh>) {
chomp;
if (m/^local diversion |^diversion by/) {
warning(g_('diversions involved - output may be incorrect'));
print { *STDERR } " $_\n"
or syserr(g_('write diversion info to stderr'));
} elsif (m/^([-a-z0-9+.:, ]+): (\/.*)$/) {
my ($pkgs, $path) = ($1, $2);
my $realpath = realpath($path);
$cached_pkgmatch{$path} = $pkgmatch->{$path} = [ split /, /, $pkgs ];
$cached_pkgmatch{$realpath} = $pkgmatch->{$realpath} = [ split /, /, $pkgs ];
} else {
warning(g_("unknown output from dpkg --search: '%s'"), $_);
}
}
close($dpkg_fh);
return $pkgmatch;
}
|