summaryrefslogtreecommitdiffstats
path: root/Bugzilla/Install/Filesystem.pm
blob: 0f9df67a8deebf83fcc370b81b6a9c3dcdbc4870 (plain)
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
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# This Source Code Form is "Incompatible With Secondary Licenses", as
# defined by the Mozilla Public License, v. 2.0.

package Bugzilla::Install::Filesystem;

# NOTE: This package may "use" any modules that it likes,
# and localconfig is available. However, all functions in this
# package should assume that:
#
# * Templates are not available.
# * Files do not have the correct permissions.
# * The database does not exist.

use 5.10.1;
use strict;

use Bugzilla::Constants;
use Bugzilla::Error;
use Bugzilla::Install::Localconfig;
use Bugzilla::Install::Util qw(install_string);
use Bugzilla::Util;
use Bugzilla::Hook;

use File::Find;
use File::Path;
use File::Basename;
use File::Copy qw(move);
use File::Spec;
use IO::File;
use POSIX ();

use parent qw(Exporter);
our @EXPORT = qw(
    update_filesystem
    create_htaccess
    fix_all_file_permissions
    fix_dir_permissions
    fix_file_permissions
);

use constant HT_DEFAULT_DENY => <<EOT;
# nothing in this directory is retrievable unless overridden by an .htaccess
# in a subdirectory
deny from all
EOT

###############
# Permissions #
###############

# Used by the permissions "constants" below.
sub _suexec { Bugzilla->localconfig->{'use_suexec'}     };
sub _group  { Bugzilla->localconfig->{'webservergroup'} };

# Writeable by the owner only.
use constant OWNER_WRITE => 0600;
# Executable by the owner only.
use constant OWNER_EXECUTE => 0700;
# A directory which is only writeable by the owner.
use constant DIR_OWNER_WRITE => 0700;

# A cgi script that the webserver can execute.
sub WS_EXECUTE { _group() ? 0750 : 0755 };
# A file that is read by cgi scripts, but is not ever read
# directly by the webserver.
sub CGI_READ { _group() ? 0640 : 0644 };
# A file that is written to by cgi scripts, but is not ever
# read or written directly by the webserver.
sub CGI_WRITE { _group() ? 0660 : 0666 };
# A file that is served directly by the web server.
sub WS_SERVE { (_group() and !_suexec()) ? 0640 : 0644 };

# A directory whose contents can be read or served by the
# webserver (so even directories containing cgi scripts
# would have this permission).
sub DIR_WS_SERVE { (_group() and !_suexec()) ? 0750 : 0755 };
# A directory that is read by cgi scripts, but is never accessed
# directly by the webserver
sub DIR_CGI_READ { _group() ? 0750 : 0755 };
# A directory that is written to by cgi scripts, but where the
# scripts never needs to overwrite files created by other
# users.
sub DIR_CGI_WRITE { _group() ? 0770 : 01777 };
# A directory that is written to by cgi scripts, where the
# scripts need to overwrite files created by other users.
sub DIR_CGI_OVERWRITE { _group() ? 0770 : 0777 };

# This can be combined (using "|") with other permissions for 
# directories that, in addition to their normal permissions (such
# as DIR_CGI_WRITE) also have content served directly from them
# (or their subdirectories) to the user, via the webserver.
sub DIR_ALSO_WS_SERVE { _suexec() ? 0001 : 0 };

# This looks like a constant because it effectively is, but
# it has to call other subroutines and read the current filesystem,
# so it's defined as a sub. This is not exported, so it doesn't have
# a perldoc. However, look at the various hashes defined inside this 
# function to understand what it returns. (There are comments throughout.)
#
# The rationale for the file permissions is that there is a group the
# web server executes the scripts as, so the cgi scripts should not be writable
# by this group. Otherwise someone may find it possible to change the cgis
# when exploiting some security flaw somewhere (not necessarily in Bugzilla!)
sub FILESYSTEM {
    my $datadir       = bz_locations()->{'datadir'};
    my $attachdir     = bz_locations()->{'attachdir'};
    my $extensionsdir = bz_locations()->{'extensionsdir'};
    my $webdotdir     = bz_locations()->{'webdotdir'};
    my $templatedir   = bz_locations()->{'templatedir'};
    my $libdir        = bz_locations()->{'libpath'};
    my $extlib        = bz_locations()->{'ext_libpath'};
    my $skinsdir      = bz_locations()->{'skinsdir'};
    my $localconfig   = bz_locations()->{'localconfig'};
    my $template_cache = bz_locations()->{'template_cache'};
    my $graphsdir     = bz_locations()->{'graphsdir'};

    # We want to set the permissions the same for all localconfig files
    # across all PROJECTs, so we do something special with $localconfig,
    # lower down in the permissions section.
    if ($ENV{PROJECT}) {
        $localconfig =~ s/\.\Q$ENV{PROJECT}\E$//;
    }

    # Note: When being processed by checksetup, these have their permissions
    # set in this order: %all_dirs, %recurse_dirs, %all_files.
    #
    # Each is processed in alphabetical order of keys, so shorter keys
    # will have their permissions set before longer keys (thus setting
    # the permissions on parent directories before setting permissions
    # on their children).

    # --- FILE PERMISSIONS (Non-created files) --- #
    my %files = (
        '*'               => { perms => OWNER_WRITE },
        # Some .pl files are WS_EXECUTE because we want
        # users to be able to cron them or otherwise run
        # them as a secure user, like the webserver owner.
        '*.cgi'           => { perms => WS_EXECUTE },
        'whineatnews.pl'  => { perms => WS_EXECUTE },
        'collectstats.pl' => { perms => WS_EXECUTE },
        'importxml.pl'    => { perms => WS_EXECUTE },
        'testserver.pl'   => { perms => WS_EXECUTE },
        'whine.pl'        => { perms => WS_EXECUTE },
        'email_in.pl'     => { perms => WS_EXECUTE },
        'sanitycheck.pl'  => { perms => WS_EXECUTE },
        'checksetup.pl'   => { perms => OWNER_EXECUTE },
        'runtests.pl'     => { perms => OWNER_EXECUTE },
        'jobqueue.pl'     => { perms => OWNER_EXECUTE },
        'migrate.pl'      => { perms => OWNER_EXECUTE },
        'install-module.pl' => { perms => OWNER_EXECUTE },

        'Bugzilla.pm'   => { perms => CGI_READ },
        "$localconfig*" => { perms => CGI_READ },
        'bugzilla.dtd'  => { perms => WS_SERVE },
        'mod_perl.pl'   => { perms => WS_SERVE },
        'robots.txt'    => { perms => WS_SERVE },
        '.htaccess'     => { perms => WS_SERVE },

        'contrib/README'       => { perms => OWNER_WRITE },
        'contrib/*/README'     => { perms => OWNER_WRITE },
        'contrib/Bugzilla.pm'  => { perms => OWNER_WRITE },
        'docs/bugzilla.ent'    => { perms => OWNER_WRITE },
        'docs/makedocs.pl'     => { perms => OWNER_EXECUTE },
        'docs/style.css'       => { perms => WS_SERVE },
        'docs/*/rel_notes.txt' => { perms => WS_SERVE },
        'docs/*/README.docs'   => { perms => OWNER_WRITE },
        "$datadir/params"      => { perms => CGI_WRITE },
        "$datadir/old-params.txt"  => { perms => OWNER_WRITE },
        "$extensionsdir/create.pl" => { perms => OWNER_EXECUTE },
        "$extensionsdir/*/*.pl"    => { perms => WS_EXECUTE },
    );

    # Directories that we want to set the perms on, but not
    # recurse through. These are directories we didn't create
    # in checkesetup.pl.
    my %non_recurse_dirs = (
        '.'  => DIR_WS_SERVE,
        docs => DIR_WS_SERVE,
    );

    # This sets the permissions for each item inside each of these 
    # directories, including the directory itself. 
    # 'CVS' directories are special, though, and are never readable by 
    # the webserver.
    my %recurse_dirs = (
        # Writeable directories
         $template_cache    => { files => CGI_READ,
                                  dirs => DIR_CGI_OVERWRITE },
         $attachdir         => { files => CGI_WRITE,
                                  dirs => DIR_CGI_WRITE },
         $webdotdir         => { files => WS_SERVE,
                                  dirs => DIR_CGI_WRITE | DIR_ALSO_WS_SERVE },
         $graphsdir         => { files => WS_SERVE,
                                  dirs => DIR_CGI_WRITE | DIR_ALSO_WS_SERVE },
         "$datadir/db"      => { files => CGI_WRITE,
                                  dirs => DIR_CGI_WRITE },

         # Readable directories
         "$datadir/mining"     => { files => CGI_READ,
                                     dirs => DIR_CGI_READ },
         "$libdir/Bugzilla"    => { files => CGI_READ,
                                     dirs => DIR_CGI_READ },
         $extlib               => { files => CGI_READ,
                                     dirs => DIR_CGI_READ },
         $templatedir          => { files => CGI_READ,
                                     dirs => DIR_CGI_READ },
         # Directories in the extensions/ dir are WS_SERVE so that
         # the web/ directories can be served by the web server.
         # But, for extra security, we deny direct webserver access to
         # the lib/ and template/ directories of extensions.
         $extensionsdir        => { files => CGI_READ,
                                     dirs => DIR_WS_SERVE },
         "$extensionsdir/*/lib" => { files => CGI_READ,
                                      dirs => DIR_CGI_READ },
         "$extensionsdir/*/template" => { files => CGI_READ,
                                           dirs => DIR_CGI_READ },

         # Content served directly by the webserver
         images                => { files => WS_SERVE,
                                     dirs => DIR_WS_SERVE },
         js                    => { files => WS_SERVE,
                                     dirs => DIR_WS_SERVE },
         $skinsdir             => { files => WS_SERVE,
                                     dirs => DIR_WS_SERVE },
         'docs/*/html'         => { files => WS_SERVE,
                                     dirs => DIR_WS_SERVE },
         'docs/*/pdf'          => { files => WS_SERVE,
                                     dirs => DIR_WS_SERVE },
         'docs/*/txt'          => { files => WS_SERVE,
                                     dirs => DIR_WS_SERVE },
         'docs/*/images'       => { files => WS_SERVE,
                                     dirs => DIR_WS_SERVE },
         "$extensionsdir/*/web" => { files => WS_SERVE,
                                     dirs => DIR_WS_SERVE },

         # Directories only for the owner, not for the webserver.
         '.bzr'                => { files => OWNER_WRITE,
                                    dirs  => DIR_OWNER_WRITE },
         t                     => { files => OWNER_WRITE,
                                     dirs => DIR_OWNER_WRITE },
         xt                    => { files => OWNER_WRITE,
                                     dirs => DIR_OWNER_WRITE },
         'docs/lib'            => { files => OWNER_WRITE,
                                     dirs => DIR_OWNER_WRITE },
         'docs/*/xml'          => { files => OWNER_WRITE,
                                     dirs => DIR_OWNER_WRITE },
         'contrib'             => { files => OWNER_EXECUTE,
                                     dirs => DIR_OWNER_WRITE, },
    );

    # --- FILES TO CREATE --- #

    # The name of each directory that we should actually *create*,
    # pointing at its default permissions.
    my %create_dirs = (
        # This is DIR_ALSO_WS_SERVE because it contains $webdotdir.
        $datadir                => DIR_CGI_OVERWRITE | DIR_ALSO_WS_SERVE,
        # Directories that are read-only for cgi scripts
        "$datadir/mining"       => DIR_CGI_READ,
        "$datadir/extensions"   => DIR_CGI_READ,
        $extensionsdir          => DIR_CGI_READ,
        # Directories that cgi scripts can write to.
        "$datadir/db"           => DIR_CGI_WRITE,
        $attachdir              => DIR_CGI_WRITE,
        $graphsdir              => DIR_CGI_WRITE | DIR_ALSO_WS_SERVE,
        $webdotdir              => DIR_CGI_WRITE | DIR_ALSO_WS_SERVE,
        # Directories that contain content served directly by the web server.
        "$skinsdir/custom"      => DIR_WS_SERVE,
        "$skinsdir/contrib"     => DIR_WS_SERVE,
    );

    # The name of each file, pointing at its default permissions and
    # default contents.
    my %create_files = (
        "$datadir/extensions/additional" => { perms    => CGI_READ, 
                                              contents => '' },
        # We create this file so that it always has the right owner
        # and permissions. Otherwise, the webserver creates it as
        # owned by itself, which can cause problems if jobqueue.pl
        # or something else is not running as the webserver or root.
        "$datadir/mailer.testfile" => { perms    => CGI_WRITE,
                                        contents => '' },
    );

    # Because checksetup controls the creation of index.html separately
    # from all other files, it gets its very own hash.
    my %index_html = (
        'index.html' => { perms => WS_SERVE, contents => <<EOT
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
  <meta http-equiv="Refresh" content="0; URL=index.cgi">
</head>
<body>
  <h1>I think you are looking for <a href="index.cgi">index.cgi</a></h1>
</body>
</html>
EOT
        }
    );

    # Because checksetup controls the .htaccess creation separately
    # by a localconfig variable, these go in a separate variable from
    # %create_files.
    #
    # Note that these get WS_SERVE as their permission
    # because they're *read* by the webserver, even though they're not
    # actually, themselves, served.
    my %htaccess = (
        "$attachdir/.htaccess"       => { perms    => WS_SERVE,
                                          contents => HT_DEFAULT_DENY },
        "$libdir/Bugzilla/.htaccess" => { perms    => WS_SERVE,
                                          contents => HT_DEFAULT_DENY },
        "$extlib/.htaccess"          => { perms    => WS_SERVE,
                                          contents => HT_DEFAULT_DENY },
        "$templatedir/.htaccess"     => { perms    => WS_SERVE,
                                          contents => HT_DEFAULT_DENY },
        'contrib/.htaccess'          => { perms    => WS_SERVE,
                                          contents => HT_DEFAULT_DENY },
        't/.htaccess'                => { perms    => WS_SERVE,
                                          contents => HT_DEFAULT_DENY },
        'xt/.htaccess'               => { perms    => WS_SERVE,
                                          contents => HT_DEFAULT_DENY },
        "$datadir/.htaccess"         => { perms    => WS_SERVE,
                                          contents => HT_DEFAULT_DENY },

        "$graphsdir/.htaccess" => { perms => WS_SERVE, contents => <<EOT
# Allow access to .png and .gif files.
<FilesMatch (\\.gif|\\.png)\$>
  Allow from all
</FilesMatch>

# And no directory listings, either.
Deny from all
EOT
        },

        "$webdotdir/.htaccess" => { perms => WS_SERVE, contents => <<EOT
# Restrict access to .dot files to the public webdot server at research.att.com
# if research.att.com ever changes their IP, or if you use a different
# webdot server, you'll need to edit this
<FilesMatch \\.dot\$>
  Allow from 192.20.225.0/24
  Deny from all
</FilesMatch>

# Allow access to .png files created by a local copy of 'dot'
<FilesMatch \\.png\$>
  Allow from all
</FilesMatch>

# And no directory listings, either.
Deny from all
EOT
        },
    );

    Bugzilla::Hook::process('install_filesystem', {
        files            => \%files,
        create_dirs      => \%create_dirs,
        non_recurse_dirs => \%non_recurse_dirs,
        recurse_dirs     => \%recurse_dirs,
        create_files     => \%create_files,
        htaccess         => \%htaccess,
    });

    my %all_files = (%create_files, %htaccess, %index_html, %files);
    my %all_dirs  = (%create_dirs, %non_recurse_dirs);

    return {
        create_dirs  => \%create_dirs,
        recurse_dirs => \%recurse_dirs,
        all_dirs     => \%all_dirs,

        create_files => \%create_files,
        htaccess     => \%htaccess,
        index_html   => \%index_html,
        all_files    => \%all_files,
    };
}

sub update_filesystem {
    my ($params) = @_;
    my $fs = FILESYSTEM();
    my %dirs  = %{$fs->{create_dirs}};
    my %files = %{$fs->{create_files}};

    my $datadir = bz_locations->{'datadir'};
    my $graphsdir = bz_locations->{'graphsdir'};
    # If the graphs/ directory doesn't exist, we're upgrading from
    # a version old enough that we need to update the $datadir/mining 
    # format.
    if (-d "$datadir/mining" && !-d $graphsdir) {
        _update_old_charts($datadir);
    }

    # If there is a file named '-All-' in $datadir/mining, then we're still
    # having mining files named by product name, and we need to convert them to
    # files named by product ID.
    if (-e File::Spec->catfile($datadir, 'mining', '-All-')) {
        _update_old_mining_filenames(File::Spec->catdir($datadir, 'mining'));
    }

    # By sorting the dirs, we assure that shorter-named directories
    # (meaning parent directories) are always created before their
    # child directories.
    foreach my $dir (sort keys %dirs) {
        unless (-d $dir) {
            print "Creating $dir directory...\n";
            mkdir $dir or die "mkdir $dir failed: $!";
            # For some reason, passing in the permissions to "mkdir"
            # doesn't work right, but doing a "chmod" does.
            chmod $dirs{$dir}, $dir or warn "Cannot chmod $dir: $!";
        }
    }

    # Move the testfile if we can't write to it, so that we can re-create
    # it with the correct permissions below.
    my $testfile = "$datadir/mailer.testfile";
    if (-e $testfile and !-w $testfile) {
        _rename_file($testfile, "$testfile.old");
    }

    # If old-params.txt exists in the root directory, move it to datadir.
    my $oldparamsfile = "old_params.txt";
    if (-e $oldparamsfile) {
        _rename_file($oldparamsfile, "$datadir/$oldparamsfile");
    }

    _create_files(%files);
    if ($params->{index_html}) {
        _create_files(%{$fs->{index_html}});
    }
    elsif (-e 'index.html') {
        my $templatedir = bz_locations()->{'templatedir'};
        print <<EOT;

*** It appears that you still have an old index.html hanging around.
    Either the contents of this file should be moved into a template and 
    placed in the '$templatedir/en/custom' directory, or you should delete 
    the file.

EOT
    }

    # Delete old files that no longer need to exist

    # 2001-04-29 jake@bugzilla.org - Remove oldemailtech
    #   http://bugzilla.mozilla.org/show_bugs.cgi?id=71552
    if (-d 'shadow') {
        print "Removing shadow directory...\n";
        rmtree("shadow");
    }

    if (-e "$datadir/versioncache") {
        print "Removing versioncache...\n";
        unlink "$datadir/versioncache";
    }

    if (-e "$datadir/duplicates.rdf") {
        print "Removing duplicates.rdf...\n";
        unlink "$datadir/duplicates.rdf";
        unlink "$datadir/duplicates-old.rdf";
    }

    if (-e "$datadir/duplicates") {
        print "Removing duplicates directory...\n";
        rmtree("$datadir/duplicates");
    }

    _remove_empty_css_files();
    _convert_single_file_skins();
}

sub _remove_empty_css_files {
    my $skinsdir = bz_locations()->{'skinsdir'};
    foreach my $css_file (glob("$skinsdir/custom/*.css"),
                          glob("$skinsdir/contrib/*/*.css"))
    {
        _remove_empty_css($css_file);
    }
}

# A simple helper for the update code that removes "empty" CSS files.
sub _remove_empty_css {
    my ($file) = @_;
    my $basename = basename($file);
    my $empty_contents = <<EOT;
/*
 * Custom rules for $basename.
 * The rules you put here override rules in that stylesheet.
 */
EOT
    if (length($empty_contents) == -s $file) {
        open(my $fh, '<', $file) or warn "$file: $!";
        my $file_contents;
        { local $/; $file_contents = <$fh>; }
        if ($file_contents eq $empty_contents) {
            print install_string('file_remove', { name => $file }), "\n";
            unlink $file or warn "$file: $!";
        }
    };
}

# We used to allow a single css file in the skins/contrib/ directory
# to be a whole skin.
sub _convert_single_file_skins {
    my $skinsdir = bz_locations()->{'skinsdir'};
    foreach my $skin_file (glob "$skinsdir/contrib/*.css") {
        my $dir_name = $skin_file;
        $dir_name =~ s/\.css$//;
        mkdir $dir_name or warn "$dir_name: $!";
        _rename_file($skin_file, "$dir_name/global.css");
    }
}

sub create_htaccess {
    _create_files(%{FILESYSTEM()->{htaccess}});

    # Repair old .htaccess files

    my $webdot_dir = bz_locations()->{'webdotdir'};
    # The public webdot IP address changed.
    my $webdot = new IO::File("$webdot_dir/.htaccess", 'r')
        || die "$webdot_dir/.htaccess: $!";
    my $webdot_data;
    { local $/; $webdot_data = <$webdot>; }
    $webdot->close;
    if ($webdot_data =~ /192\.20\.225\.10/) {
        print "Repairing $webdot_dir/.htaccess...\n";
        $webdot_data =~ s/192\.20\.225\.10/192.20.225.0\/24/g;
        $webdot = new IO::File("$webdot_dir/.htaccess", 'w') || die $!;
        print $webdot $webdot_data;
        $webdot->close;
    }
}

sub _rename_file {
    my ($from, $to) = @_;
    print install_string('file_rename', { from => $from, to => $to }), "\n";
    if (-e $to) {
        warn "$to already exists, not moving\n";
    }
    else {
        move($from, $to) or warn $!;
    }
}

# A helper for the above functions.
sub _create_files {
    my (%files) = @_;

    # It's not necessary to sort these, but it does make the
    # output of checksetup.pl look a bit nicer.
    foreach my $file (sort keys %files) {
        unless (-e $file) {
            print "Creating $file...\n";
            my $info = $files{$file};
            my $fh = new IO::File($file, O_WRONLY | O_CREAT, $info->{perms})
                || die $!;
            print $fh $info->{contents} if $info->{contents};
            $fh->close;
        }
    }
}

# If you ran a REALLY old version of Bugzilla, your chart files are in the
# wrong format. This code is a little messy, because it's very old, and
# when moving it into this module, I couldn't test it so I left it almost 
# completely alone.
sub _update_old_charts {
    my ($datadir) = @_;
    print "Updating old chart storage format...\n";
    foreach my $in_file (glob("$datadir/mining/*")) {
        # Don't try and upgrade image or db files!
        next if (($in_file =~ /\.gif$/i) ||
                 ($in_file =~ /\.png$/i) ||
                 ($in_file =~ /\.db$/i) ||
                 ($in_file =~ /\.orig$/i));

        rename("$in_file", "$in_file.orig") or next;
        open(IN, "$in_file.orig") or next;
        open(OUT, '>', $in_file) or next;

        # Fields in the header
        my @declared_fields;

        # Fields we changed to half way through by mistake
        # This list comes from an old version of collectstats.pl
        # This part is only for people who ran later versions of 2.11 (devel)
        my @intermediate_fields = qw(DATE UNCONFIRMED NEW ASSIGNED REOPENED
                                     RESOLVED VERIFIED CLOSED);

        # Fields we actually want (matches the current collectstats.pl)
        my @out_fields = qw(DATE NEW ASSIGNED REOPENED UNCONFIRMED RESOLVED
                            VERIFIED CLOSED FIXED INVALID WONTFIX LATER REMIND
                            DUPLICATE WORKSFORME MOVED);

         while (<IN>) {
            if (/^# fields?: (.*)\s$/) {
                @declared_fields = map uc, (split /\||\r/, $1);
                print OUT "# fields: ", join('|', @out_fields), "\n";
            }
            elsif (/^(\d+\|.*)/) {
                my @data = split(/\||\r/, $1);
                my %data;
                if (@data == @declared_fields) {
                    # old format
                    for my $i (0 .. $#declared_fields) {
                        $data{$declared_fields[$i]} = $data[$i];
                    }
                }
                elsif (@data == @intermediate_fields) {
                    # Must have changed over at this point
                    for my $i (0 .. $#intermediate_fields) {
                        $data{$intermediate_fields[$i]} = $data[$i];
                    }
                }
                elsif (@data == @out_fields) {
                    # This line's fine - it has the right number of entries
                    for my $i (0 .. $#out_fields) {
                        $data{$out_fields[$i]} = $data[$i];
                    }
                }
                else {
                    print "Oh dear, input line $. of $in_file had " .
                          scalar(@data) . " fields\nThis was unexpected.",
                          " You may want to check your data files.\n";
                }

                print OUT join('|', 
                    map { defined ($data{$_}) ? ($data{$_}) : "" } @out_fields),
                    "\n";
            }
            else {
                print OUT;
            }
        }

        close(IN);
        close(OUT);
    } 
}

# The old naming scheme has product names as mining file names; we rename them
# to product IDs.
sub _update_old_mining_filenames {
    my ($miningdir) = @_;
    my @conversion_errors;

    require Bugzilla::Product;

    # We use a dummy product instance with ID 0, representing all products
    my $product_all = {id => 0, name => '-All-'};
    bless($product_all, 'Bugzilla::Product');

    print "Updating old charting data file names...";
    my @products = Bugzilla::Product->get_all();
    push(@products, $product_all);
    foreach my $product (@products) {
        if (-e File::Spec->catfile($miningdir, $product->id)) {
            push(@conversion_errors,
                 { product => $product,
                   message => 'A file named "' . $product->id .
                              '" already exists.' });
        }
    }

    if (! @conversion_errors) {
        # Renaming mining files should work now without a hitch.
        foreach my $product (@products) {
            if (! rename(File::Spec->catfile($miningdir, $product->name),
                         File::Spec->catfile($miningdir, $product->id))) {
                push(@conversion_errors,
                     { product => $product,
                       message => $! });
            }
        }
    }

    # Error reporting
    if (! @conversion_errors) {
        print " done.\n";
    }
    else {
        print " FAILED:\n";
        foreach my $error (@conversion_errors) {
            printf "Cannot rename charting data file for product %d (%s): %s\n",
                   $error->{product}->id, $error->{product}->name,
                   $error->{message};
        }
        print "You need to empty the \"$miningdir\" directory, then run\n",
              "   collectstats.pl --regenerate\n",
              "in order to clean this up.\n";
    }
}

sub fix_dir_permissions {
    my ($dir) = @_;
    return if ON_WINDOWS;
    # Note that _get_owner_and_group is always silent here.
    my ($owner_id, $group_id) = _get_owner_and_group();

    my $perms;
    my $fs = FILESYSTEM();
    if ($perms = $fs->{recurse_dirs}->{$dir}) {
        _fix_perms_recursively($dir, $owner_id, $group_id, $perms);
    }
    elsif ($perms = $fs->{all_dirs}->{$dir}) {
        _fix_perms($dir, $owner_id, $group_id, $perms);
    }
    else {
        # Do nothing. We know nothing about this directory.
        warn "Unknown directory $dir";
    }
}

sub fix_file_permissions {
    my ($file) = @_;
    return if ON_WINDOWS;
    my $perms = FILESYSTEM()->{all_files}->{$file}->{perms};
    # Note that _get_owner_and_group is always silent here.
    my ($owner_id, $group_id) = _get_owner_and_group();
    _fix_perms($file, $owner_id, $group_id, $perms);
}

sub fix_all_file_permissions {
    my ($output) = @_;

    # _get_owner_and_group also checks that the webservergroup is valid.
    my ($owner_id, $group_id) = _get_owner_and_group($output);

    return if ON_WINDOWS;

    my $fs = FILESYSTEM();
    my %files = %{$fs->{all_files}};
    my %dirs  = %{$fs->{all_dirs}};
    my %recurse_dirs = %{$fs->{recurse_dirs}};

    print get_text('install_file_perms_fix') . "\n" if $output;

    foreach my $dir (sort keys %dirs) {
        next unless -d $dir;
        _fix_perms($dir, $owner_id, $group_id, $dirs{$dir});
    }

    foreach my $pattern (sort keys %recurse_dirs) {
        my $perms = $recurse_dirs{$pattern};
        # %recurse_dirs supports globs
        foreach my $dir (glob $pattern) {
            next unless -d $dir;
            _fix_perms_recursively($dir, $owner_id, $group_id, $perms);
        }
    }

    foreach my $file (sort keys %files) {
        # %files supports globs
        foreach my $filename (glob $file) {
            # Don't touch directories.
            next if -d $filename || !-e $filename;
            _fix_perms($filename, $owner_id, $group_id, 
                       $files{$file}->{perms});
        }
    }

    _fix_cvs_dirs($owner_id, '.');
}

sub _get_owner_and_group {
    my ($output) = @_;
    my $group_id = _check_web_server_group($output);
    return () if ON_WINDOWS;

    my $owner_id = POSIX::getuid();
    $group_id = POSIX::getgid() unless defined $group_id;
    return ($owner_id, $group_id);
}

# A helper for fix_all_file_permissions
sub _fix_cvs_dirs {
    my ($owner_id, $dir) = @_;
    my $owner_gid = POSIX::getgid();
    find({ no_chdir => 1, wanted => sub {
        my $name = $File::Find::name;
        if ($File::Find::dir =~ /\/CVS/ || $_ eq '.cvsignore'
            || (-d $name && $_ =~ /CVS$/)) 
        {
            my $perms = 0600;
            if (-d $name) {
                $perms = 0700;
            }
            _fix_perms($name, $owner_id, $owner_gid, $perms);
        }
    }}, $dir);
}

sub _fix_perms {
    my ($name, $owner, $group, $perms) = @_;
    #printf ("Changing $name to %o\n", $perms);

    # The webserver should never try to chown files.
    if (Bugzilla->usage_mode == USAGE_MODE_CMDLINE) {
        chown $owner, $group, $name
            or warn install_string('chown_failed', { path => $name, 
                                                     error => $! }) . "\n";
    }
    chmod $perms, $name
        or warn install_string('chmod_failed', { path => $name, 
                                                 error => $! }) . "\n";
}

sub _fix_perms_recursively {
    my ($dir, $owner_id, $group_id, $perms) = @_;
    # Set permissions on the directory itself.
    _fix_perms($dir, $owner_id, $group_id, $perms->{dirs});
    # Now recurse through the directory and set the correct permissions
    # on subdirectories and files.
    find({ no_chdir => 1, wanted => sub {
        my $name = $File::Find::name;
        if (-d $name) {
            _fix_perms($name, $owner_id, $group_id, $perms->{dirs});
        }
        else {
            _fix_perms($name, $owner_id, $group_id, $perms->{files});
        }
    }}, $dir);
}

sub _check_web_server_group {
    my ($output) = @_;

    my $group    = Bugzilla->localconfig->{'webservergroup'};
    my $filename = bz_locations()->{'localconfig'};
    my $group_id;

    # If we are on Windows, webservergroup does nothing
    if (ON_WINDOWS && $group && $output) {
        print "\n\n" . get_text('install_webservergroup_windows') . "\n\n";
    }

    # If we're not on Windows, make sure that webservergroup isn't
    # empty.
    elsif (!ON_WINDOWS && !$group && $output) {
        print "\n\n" . get_text('install_webservergroup_empty') . "\n\n";
    }

    # If we're not on Windows, make sure we are actually a member of
    # the webservergroup.
    elsif (!ON_WINDOWS && $group) {
        $group_id = getgrnam($group);
        ThrowCodeError('invalid_webservergroup', { group => $group }) 
            unless defined $group_id;

        # If on unix, see if we need to print a warning about a webservergroup
        # that we can't chgrp to
        if ($output && $< != 0 && !grep($_ eq $group_id, split(" ", $)))) {
            print "\n\n" . get_text('install_webservergroup_not_in') . "\n\n";
        }
    }

    return $group_id;
}

1;

__END__

=head1 NAME

Bugzilla::Install::Filesystem - Fix up the filesystem during
  installation.

=head1 DESCRIPTION

This module is used primarily by L<checksetup.pl> to modify the 
filesystem during installation, including creating the data/ directory.

=head1 SUBROUTINES

=over

=item C<update_filesystem({ index_html => 0 })>

Description: Creates all the directories and files that Bugzilla
             needs to function but doesn't ship with. Also does
             any updates to these files as necessary during an
             upgrade.

Params:      C<index_html> - Whether or not we should create
               the F<index.html> file.

Returns:     nothing

=item C<create_htaccess()>

Description: Creates all of the .htaccess files for Apache,
             in the various Bugzilla directories. Also updates
             the .htaccess files if they need updating.

Params:      none

Returns:     nothing

=item C<fix_all_file_permissions($output)>

Description: Sets all the file permissions on all of Bugzilla's files
             to what they should be. Note that permissions are different
             depending on whether or not C<$webservergroup> is set
             in F<localconfig>.

Params:      C<$output> - C<true> if you want this function to print
                 out information about what it's doing.

Returns:     nothing

=item C<fix_dir_permissions>

Given the name of a directory, its permissions will be fixed according to
how they are supposed to be set in Bugzilla's current configuration.
If it fails to set the permissions, a warning will be printed to STDERR.

=item C<fix_file_permissions>

Given the name of a file, its permissions will be fixed according to
how they are supposed to be set in Bugzilla's current configuration.
If it fails to set the permissions, a warning will be printed to STDERR.

=back

=head1 B<Methods in need of POD>

=over

=item CGI_WRITE

=item DIR_WS_SERVE

=item DIR_ALSO_WS_SERVE

=item WS_SERVE

=item FILESYSTEM

=item WS_EXECUTE

=item CGI_READ

=item DIR_CGI_READ

=item DIR_CGI_WRITE

=item DIR_CGI_OVERWRITE

=back