source: main/trunk/greenstone2/perllib/util.pm@ 22386

Last change on this file since 22386 was 22386, checked in by davidb, 11 years ago

Extra check added to avoid appending/prepending an environment variable when it does not exist yet

  • Property svn:keywords set to Author Date Id Revision
File size: 34.0 KB
Line 
1###########################################################################
2#
3# util.pm -- various useful utilities
4# A component of the Greenstone digital library software
5# from the New Zealand Digital Library Project at the
6# University of Waikato, New Zealand.
7#
8# Copyright (C) 1999 New Zealand Digital Library Project
9#
10# This program is free software; you can redistribute it and/or modify
11# it under the terms of the GNU General Public License as published by
12# the Free Software Foundation; either version 2 of the License, or
13# (at your option) any later version.
14#
15# This program is distributed in the hope that it will be useful,
16# but WITHOUT ANY WARRANTY; without even the implied warranty of
17# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18# GNU General Public License for more details.
19#
20# You should have received a copy of the GNU General Public License
21# along with this program; if not, write to the Free Software
22# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23#
24###########################################################################
25
26package util;
27
28use File::Copy;
29use File::Basename;
30
31use strict;
32
33
34# removes files (but not directories)
35sub rm {
36 my (@files) = @_;
37
38 my @filefiles = ();
39
40 # make sure the files we want to delete exist
41 # and are regular files
42 foreach my $file (@files) {
43 if (!-e $file) {
44 print STDERR "util::rm $file does not exist\n";
45 } elsif ((!-f $file) && (!-l $file)) {
46 print STDERR "util::rm $file is not a regular (or symbolic) file\n";
47 } else {
48 push (@filefiles, $file);
49 }
50 }
51
52 # remove the files
53 my $numremoved = unlink @filefiles;
54
55 # check to make sure all of them were removed
56 if ($numremoved != scalar(@filefiles)) {
57 print STDERR "util::rm Not all files were removed\n";
58 }
59}
60
61
62
63# recursive removal
64sub filtered_rm_r {
65 my ($files,$file_accept_re,$file_reject_re) = @_;
66
67 my @files_array = (ref $files eq "ARRAY") ? @$files : ($files);
68
69 # recursively remove the files
70 foreach my $file (@files_array) {
71 $file =~ s/[\/\\]+$//; # remove trailing slashes
72
73 if (!-e $file) {
74 print STDERR "util::filtered_rm_r $file does not exist\n";
75
76 } elsif ((-d $file) && (!-l $file)) { # don't recurse down symbolic link
77 # get the contents of this directory
78 if (!opendir (INDIR, $file)) {
79 print STDERR "util::filtered_rm_r could not open directory $file\n";
80 } else {
81 my @filedir = grep (!/^\.\.?$/, readdir (INDIR));
82 closedir (INDIR);
83
84 # remove all the files in this directory
85 map {$_="$file/$_";} @filedir;
86 &filtered_rm_r (\@filedir,$file_accept_re,$file_reject_re);
87
88 if (!defined $file_accept_re && !defined $file_reject_re) {
89 # remove this directory
90 if (!rmdir $file) {
91 print STDERR "util::filtered_rm_r couldn't remove directory $file\n";
92 }
93 }
94 }
95 } else {
96 next if (defined $file_reject_re && ($file =~ m/$file_reject_re/));
97
98 if ((!defined $file_accept_re) || ($file =~ m/$file_accept_re/)) {
99 # remove this file
100 &rm ($file);
101 }
102 }
103 }
104}
105
106
107# recursive removal
108sub rm_r {
109 my (@files) = @_;
110
111 # use the more general (but reterospectively written function
112 # filtered_rm_r function()
113
114 filtered_rm_r(\@files,undef,undef); # no accept or reject expressions
115}
116
117
118
119
120# moves a file or a group of files
121sub mv {
122 my $dest = pop (@_);
123 my (@srcfiles) = @_;
124
125 # remove trailing slashes from source and destination files
126 $dest =~ s/[\\\/]+$//;
127 map {$_ =~ s/[\\\/]+$//;} @srcfiles;
128
129 # a few sanity checks
130 if (scalar (@srcfiles) == 0) {
131 print STDERR "util::mv no destination directory given\n";
132 return;
133 } elsif ((scalar (@srcfiles) > 1) && (!-d $dest)) {
134 print STDERR "util::mv if multiple source files are given the ".
135 "destination must be a directory\n";
136 return;
137 }
138
139 # move the files
140 foreach my $file (@srcfiles) {
141 my $tempdest = $dest;
142 if (-d $tempdest) {
143 my ($filename) = $file =~ /([^\\\/]+)$/;
144 $tempdest .= "/$filename";
145 }
146 if (!-e $file) {
147 print STDERR "util::mv $file does not exist\n";
148 } else {
149 rename ($file, $tempdest);
150 }
151 }
152}
153
154
155# copies a file or a group of files
156sub cp {
157 my $dest = pop (@_);
158 my (@srcfiles) = @_;
159
160 # remove trailing slashes from source and destination files
161 $dest =~ s/[\\\/]+$//;
162 map {$_ =~ s/[\\\/]+$//;} @srcfiles;
163
164 # a few sanity checks
165 if (scalar (@srcfiles) == 0) {
166 print STDERR "util::cp no destination directory given\n";
167 return;
168 } elsif ((scalar (@srcfiles) > 1) && (!-d $dest)) {
169 print STDERR "util::cp if multiple source files are given the ".
170 "destination must be a directory\n";
171 return;
172 }
173
174 # copy the files
175 foreach my $file (@srcfiles) {
176 my $tempdest = $dest;
177 if (-d $tempdest) {
178 my ($filename) = $file =~ /([^\\\/]+)$/;
179 $tempdest .= "/$filename";
180 }
181 if (!-e $file) {
182 print STDERR "util::cp $file does not exist\n";
183 } elsif (!-f $file) {
184 print STDERR "util::cp $file is not a plain file\n";
185 } else {
186 &File::Copy::copy ($file, $tempdest);
187 }
188 }
189}
190
191
192
193# recursively copies a file or group of files
194# syntax: cp_r (sourcefiles, destination directory)
195# destination must be a directory - to copy one file to
196# another use cp instead
197sub cp_r {
198 my $dest = pop (@_);
199 my (@srcfiles) = @_;
200
201 # a few sanity checks
202 if (scalar (@srcfiles) == 0) {
203 print STDERR "util::cp_r no destination directory given\n";
204 return;
205 } elsif (-f $dest) {
206 print STDERR "util::cp_r destination must be a directory\n";
207 return;
208 }
209
210 # create destination directory if it doesn't exist already
211 if (! -d $dest) {
212 my $store_umask = umask(0002);
213 mkdir ($dest, 0777);
214 umask($store_umask);
215 }
216
217 # copy the files
218 foreach my $file (@srcfiles) {
219
220 if (!-e $file) {
221 print STDERR "util::cp_r $file does not exist\n";
222
223 } elsif (-d $file) {
224 # make the new directory
225 my ($filename) = $file =~ /([^\\\/]*)$/;
226 $dest = &util::filename_cat ($dest, $filename);
227 my $store_umask = umask(0002);
228 mkdir ($dest, 0777);
229 umask($store_umask);
230
231 # get the contents of this directory
232 if (!opendir (INDIR, $file)) {
233 print STDERR "util::cp_r could not open directory $file\n";
234 } else {
235 my @filedir = readdir (INDIR);
236 closedir (INDIR);
237 foreach my $f (@filedir) {
238 next if $f =~ /^\.\.?$/;
239 # copy all the files in this directory
240 my $ff = &util::filename_cat ($file, $f);
241 &cp_r ($ff, $dest);
242 }
243 }
244
245 } else {
246 &cp($file, $dest);
247 }
248 }
249}
250# recursively copies a file or group of files
251# syntax: cp_r (sourcefiles, destination directory)
252# destination must be a directory - to copy one file to
253# another use cp instead
254sub cp_r_nosvn {
255 my $dest = pop (@_);
256 my (@srcfiles) = @_;
257
258 # a few sanity checks
259 if (scalar (@srcfiles) == 0) {
260 print STDERR "util::cp_r no destination directory given\n";
261 return;
262 } elsif (-f $dest) {
263 print STDERR "util::cp_r destination must be a directory\n";
264 return;
265 }
266
267 # create destination directory if it doesn't exist already
268 if (! -d $dest) {
269 my $store_umask = umask(0002);
270 mkdir ($dest, 0777);
271 umask($store_umask);
272 }
273
274 # copy the files
275 foreach my $file (@srcfiles) {
276
277 if (!-e $file) {
278 print STDERR "util::cp_r $file does not exist\n";
279
280 } elsif (-d $file) {
281 # make the new directory
282 my ($filename) = $file =~ /([^\\\/]*)$/;
283 $dest = &util::filename_cat ($dest, $filename);
284 my $store_umask = umask(0002);
285 mkdir ($dest, 0777);
286 umask($store_umask);
287
288 # get the contents of this directory
289 if (!opendir (INDIR, $file)) {
290 print STDERR "util::cp_r could not open directory $file\n";
291 } else {
292 my @filedir = readdir (INDIR);
293 closedir (INDIR);
294 foreach my $f (@filedir) {
295 next if $f =~ /^\.\.?$/;
296 next if $f =~ /^\.svn$/;
297 # copy all the files in this directory
298 my $ff = &util::filename_cat ($file, $f);
299 &cp_r ($ff, $dest);
300 }
301 }
302
303 } else {
304 &cp($file, $dest);
305 }
306 }
307}
308
309# copies a directory and its contents, excluding subdirectories, into a new directory
310sub cp_r_toplevel {
311 my $dest = pop (@_);
312 my (@srcfiles) = @_;
313
314 # a few sanity checks
315 if (scalar (@srcfiles) == 0) {
316 print STDERR "util::cp_r no destination directory given\n";
317 return;
318 } elsif (-f $dest) {
319 print STDERR "util::cp_r destination must be a directory\n";
320 return;
321 }
322
323 # create destination directory if it doesn't exist already
324 if (! -d $dest) {
325 my $store_umask = umask(0002);
326 mkdir ($dest, 0777);
327 umask($store_umask);
328 }
329
330 # copy the files
331 foreach my $file (@srcfiles) {
332
333 if (!-e $file) {
334 print STDERR "util::cp_r $file does not exist\n";
335
336 } elsif (-d $file) {
337 # make the new directory
338 my ($filename) = $file =~ /([^\\\/]*)$/;
339 $dest = &util::filename_cat ($dest, $filename);
340 my $store_umask = umask(0002);
341 mkdir ($dest, 0777);
342 umask($store_umask);
343
344 # get the contents of this directory
345 if (!opendir (INDIR, $file)) {
346 print STDERR "util::cp_r could not open directory $file\n";
347 } else {
348 my @filedir = readdir (INDIR);
349 closedir (INDIR);
350 foreach my $f (@filedir) {
351 next if $f =~ /^\.\.?$/;
352
353 # copy all the files in this directory, but not directories
354 my $ff = &util::filename_cat ($file, $f);
355 if (-f $ff) {
356 &cp($ff, $dest);
357 #&cp_r ($ff, $dest);
358 }
359 }
360 }
361
362 } else {
363 &cp($file, $dest);
364 }
365 }
366}
367
368sub mk_dir {
369 my ($dir) = @_;
370
371 my $store_umask = umask(0002);
372 my $mkdir_ok = mkdir ($dir, 0777);
373 umask($store_umask);
374
375 if (!$mkdir_ok)
376 {
377 print STDERR "util::mk_dir could not create directory $dir\n";
378 return;
379 }
380}
381
382# in case anyone cares - I did some testing (using perls Benchmark module)
383# on this subroutine against File::Path::mkpath (). mk_all_dir() is apparently
384# slightly faster (surprisingly) - Stefan.
385sub mk_all_dir {
386 my ($dir) = @_;
387
388 # use / for the directory separator, remove duplicate and
389 # trailing slashes
390 $dir=~s/[\\\/]+/\//g;
391 $dir=~s/[\\\/]+$//;
392
393 # make sure the cache directory exists
394 my $dirsofar = "";
395 my $first = 1;
396 foreach my $dirname (split ("/", $dir)) {
397 $dirsofar .= "/" unless $first;
398 $first = 0;
399
400 $dirsofar .= $dirname;
401
402 next if $dirname =~ /^(|[a-z]:)$/i;
403 if (!-e $dirsofar)
404 {
405 my $store_umask = umask(0002);
406 my $mkdir_ok = mkdir ($dirsofar, 0777);
407 umask($store_umask);
408 if (!$mkdir_ok)
409 {
410 print STDERR "util::mk_all_dir could not create directory $dirsofar\n";
411 return;
412 }
413 }
414 }
415}
416
417# make hard link to file if supported by OS, otherwise copy the file
418sub hard_link {
419 my ($src, $dest, $verbosity) = @_;
420
421 # remove trailing slashes from source and destination files
422 $src =~ s/[\\\/]+$//;
423 $dest =~ s/[\\\/]+$//;
424
425 # a few sanity checks
426 if (-e $dest) {
427 # destination file already exists
428 return;
429 }
430 elsif (!-e $src) {
431 print STDERR "util::hard_link source file $src does not exist\n";
432 return 1;
433 }
434 elsif (-d $src) {
435 print STDERR "util::hard_link source $src is a directory\n";
436 return 1;
437 }
438
439 my $dest_dir = &File::Basename::dirname($dest);
440 mk_all_dir($dest_dir) if (!-e $dest_dir);
441
442
443 if (!link($src, $dest)) {
444 if ((!defined $verbosity) || ($verbosity>2)) {
445 print STDERR "util::hard_link: unable to create hard link. ";
446 print STDERR " Copying file: $src -> $dest\n";
447 }
448 &File::Copy::copy ($src, $dest);
449 }
450 return 0;
451}
452
453# make soft link to file if supported by OS, otherwise copy file
454sub soft_link {
455 my ($src, $dest, $ensure_paths_absolute) = @_;
456
457 # remove trailing slashes from source and destination files
458 $src =~ s/[\\\/]+$//;
459 $dest =~ s/[\\\/]+$//;
460
461 # Ensure file paths are absolute IF requested to do so
462 # Soft_linking didn't work for relative paths
463 if(defined $ensure_paths_absolute && $ensure_paths_absolute) {
464 # We need to ensure that the src file is the absolute path
465 # See http://perldoc.perl.org/File/Spec.html
466 if(!File::Spec->file_name_is_absolute( $src )) { # it's relative
467 $src = File::Spec->rel2abs($src); # make absolute
468 }
469 # Might as well ensure that the destination file's absolute path is used
470 if(!File::Spec->file_name_is_absolute( $dest )) {
471 $dest = File::Spec->rel2abs($dest); # make absolute
472 }
473 }
474
475 # a few sanity checks
476 if (!-e $src) {
477 print STDERR "util::soft_link source file $src does not exist\n";
478 return 0;
479 }
480
481 my $dest_dir = &File::Basename::dirname($dest);
482 mk_all_dir($dest_dir) if (!-e $dest_dir);
483
484 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
485 # symlink not supported on windows
486 &File::Copy::copy ($src, $dest);
487
488 } elsif (!eval {symlink($src, $dest)}) {
489 print STDERR "util::soft_link: unable to create soft link.\n";
490 return 0;
491 }
492
493 return 1;
494}
495
496
497
498
499# updates a copy of a directory in some other part of the filesystem
500# verbosity settings are: 0=low, 1=normal, 2=high
501# both $fromdir and $todir should be absolute paths
502sub cachedir {
503 my ($fromdir, $todir, $verbosity) = @_;
504 $verbosity = 1 unless defined $verbosity;
505
506 # use / for the directory separator, remove duplicate and
507 # trailing slashes
508 $fromdir=~s/[\\\/]+/\//g;
509 $fromdir=~s/[\\\/]+$//;
510 $todir=~s/[\\\/]+/\//g;
511 $todir=~s/[\\\/]+$//;
512
513 &mk_all_dir ($todir);
514
515 # get the directories in ascending order
516 if (!opendir (FROMDIR, $fromdir)) {
517 print STDERR "util::cachedir could not read directory $fromdir\n";
518 return;
519 }
520 my @fromdir = grep (!/^\.\.?$/, sort(readdir (FROMDIR)));
521 closedir (FROMDIR);
522
523 if (!opendir (TODIR, $todir)) {
524 print STDERR "util::cacedir could not read directory $todir\n";
525 return;
526 }
527 my @todir = grep (!/^\.\.?$/, sort(readdir (TODIR)));
528 closedir (TODIR);
529
530 my $fromi = 0;
531 my $toi = 0;
532
533 while ($fromi < scalar(@fromdir) || $toi < scalar(@todir)) {
534# print "fromi: $fromi toi: $toi\n";
535
536 # see if we should delete a file/directory
537 # this should happen if the file/directory
538 # is not in the from list or if its a different
539 # size, or has an older timestamp
540 if ($toi < scalar(@todir)) {
541 if (($fromi >= scalar(@fromdir)) ||
542 ($todir[$toi] lt $fromdir[$fromi] ||
543 ($todir[$toi] eq $fromdir[$fromi] &&
544 &differentfiles("$fromdir/$fromdir[$fromi]","$todir/$todir[$toi]",
545 $verbosity)))) {
546
547 # the files are different
548 &rm_r("$todir/$todir[$toi]");
549 splice(@todir, $toi, 1); # $toi stays the same
550
551 } elsif ($todir[$toi] eq $fromdir[$fromi]) {
552 # the files are the same
553 # if it is a directory, check its contents
554 if (-d "$todir/$todir[$toi]") {
555 &cachedir ("$fromdir/$fromdir[$fromi]",
556 "$todir/$todir[$toi]", $verbosity);
557 }
558
559 $toi++;
560 $fromi++;
561 next;
562 }
563 }
564
565 # see if we should insert a file/directory
566 # we should insert a file/directory if there
567 # is no tofiles left or if the tofile does not exist
568 if ($fromi < scalar(@fromdir) && ($toi >= scalar(@todir) ||
569 $todir[$toi] gt $fromdir[$fromi])) {
570 &cp_r ("$fromdir/$fromdir[$fromi]", "$todir/$fromdir[$fromi]");
571 splice (@todir, $toi, 0, $fromdir[$fromi]);
572
573 $toi++;
574 $fromi++;
575 }
576 }
577}
578
579# this function returns -1 if either file is not found
580# assumes that $file1 and $file2 are absolute file names or
581# in the current directory
582# $file2 is allowed to be newer than $file1
583sub differentfiles {
584 my ($file1, $file2, $verbosity) = @_;
585 $verbosity = 1 unless defined $verbosity;
586
587 $file1 =~ s/\/+$//;
588 $file2 =~ s/\/+$//;
589
590 my ($file1name) = $file1 =~ /\/([^\/]*)$/;
591 my ($file2name) = $file2 =~ /\/([^\/]*)$/;
592
593 return -1 unless (-e $file1 && -e $file2);
594 if ($file1name ne $file2name) {
595 print STDERR "filenames are not the same\n" if ($verbosity >= 2);
596 return 1;
597 }
598
599 my @file1stat = stat ($file1);
600 my @file2stat = stat ($file2);
601
602 if (-d $file1) {
603 if (! -d $file2) {
604 print STDERR "one file is a directory\n" if ($verbosity >= 2);
605 return 1;
606 }
607 return 0;
608 }
609
610 # both must be regular files
611 unless (-f $file1 && -f $file2) {
612 print STDERR "one file is not a regular file\n" if ($verbosity >= 2);
613 return 1;
614 }
615
616 # the size of the files must be the same
617 if ($file1stat[7] != $file2stat[7]) {
618 print STDERR "different sized files\n" if ($verbosity >= 2);
619 return 1;
620 }
621
622 # the second file cannot be older than the first
623 if ($file1stat[9] > $file2stat[9]) {
624 print STDERR "file is older\n" if ($verbosity >= 2);
625 return 1;
626 }
627
628 return 0;
629}
630
631
632sub get_tmp_filename
633{
634 my $file_ext = shift(@_) || undef;
635
636 my $opt_dot_file_ext = (defined $file_ext) ? ".$file_ext" : "";
637
638 my $tmpdir = filename_cat($ENV{'GSDLHOME'}, "tmp");
639 &mk_all_dir ($tmpdir) unless -e $tmpdir;
640
641 my $count = 1000;
642 my $rand = int(rand $count);
643 my $full_tmp_filename = &filename_cat($tmpdir, "F$rand$opt_dot_file_ext");
644
645 while (-e $full_tmp_filename) {
646 $rand = int(rand $count);
647 $full_tmp_filename = &filename_cat($tmpdir, "F$rand$opt_dot_file_ext");
648 $count++;
649 }
650
651 return $full_tmp_filename;
652}
653
654sub get_toplevel_tmp_dir
655{
656 return filename_cat($ENV{'GSDLHOME'}, "tmp");
657}
658
659
660sub filename_to_regex {
661 my $filename = shift (@_);
662
663 # need to put single backslash back to double so that regex works
664 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
665 $filename =~ s/\\/\\\\/g;
666 }
667 return $filename;
668}
669
670sub filename_cat {
671 my $first_file = shift(@_);
672 my (@filenames) = @_;
673
674# Useful for debugging
675# -- might make sense to call caller(0) rather than (1)??
676# my ($cpackage,$cfilename,$cline,$csubr,$chas_args,$cwantarray) = caller(1);
677# print STDERR "Calling method; $cfilename:$cline $cpackage->$csubr\n";
678
679 # If first_file is not null or empty, then add it back into the list
680 if (defined $first_file && $first_file =~ /\S/) {
681 unshift(@filenames, $first_file);
682 }
683
684 my $filename = join("/", @filenames);
685
686 # remove duplicate slashes and remove the last slash
687 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
688 $filename =~ s/[\\\/]+/\\/g;
689 } else {
690 $filename =~ s/[\/]+/\//g;
691 # DB: want a filename abc\de.html to remain like this
692 }
693 $filename =~ s/[\\\/]$//;
694
695 return $filename;
696}
697
698
699sub pathname_cat {
700 my $first_path = shift(@_);
701 my (@pathnames) = @_;
702
703 # If first_path is not null or empty, then add it back into the list
704 if (defined $first_path && $first_path =~ /\S/) {
705 unshift(@pathnames, $first_path);
706 }
707
708 my $join_char;
709 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
710 $join_char = ";";
711 } else {
712 $join_char = ":";
713 }
714
715 my $pathname = join($join_char, @pathnames);
716
717 # remove duplicate slashes
718 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
719 $pathname =~ s/[\\\/]+/\\/g;
720 } else {
721 $pathname =~ s/[\/]+/\//g;
722 # DB: want a pathname abc\de.html to remain like this
723 }
724
725 return $pathname;
726}
727
728
729sub tidy_up_oid {
730 my ($OID) = @_;
731 if ($OID =~ /\./) {
732 print STDERR "Warning, identifier $OID contains periods (.), removing them\n";
733 $OID =~ s/\.//g; #remove any periods
734 }
735 if ($OID =~ /^\s.*\s$/) {
736 print STDERR "Warning, identifier $OID starts or ends with whitespace. Removing it\n";
737 # remove starting and trailing whitespace
738 $OID =~ s/^\s+//;
739 $OID =~ s/\s+$//;
740 }
741 if ($OID =~ /^[\d]*$/) {
742 print STDERR "Warning, identifier $OID contains only digits. Prepending 'D'.\n";
743 $OID = "D" . $OID;
744 }
745
746 return $OID;
747}
748sub envvar_prepend {
749 my ($var,$val) = @_;
750
751 # do not prepend any value/path that's already in the environment variable
752 if ($ENV{'GSDLOS'} =~ /^windows$/i)
753 {
754 my $escaped_val = $val;
755 $escaped_val =~ s/\\/\\\\/g; # escape any Windows backslashes for upcoming regex
756 if (!defined($ENV{$var})) {
757 $ENV{$var} = "$val";
758 }
759 elsif($ENV{$var} !~ m/$escaped_val/) {
760 $ENV{$var} = "$val;".$ENV{$var};
761 }
762 }
763 else {
764 if (!defined($ENV{$var})) {
765 $ENV{$var} = "$val";
766 }
767 elsif($ENV{$var} !~ m/$val/) {
768 $ENV{$var} = "$val:".$ENV{$var};
769 }
770 }
771}
772
773sub envvar_append {
774 my ($var,$val) = @_;
775
776 # do not append any value/path that's already in the environment variable
777 if ($ENV{'GSDLOS'} =~ /^windows$/i)
778 {
779 my $escaped_val = $val;
780 $escaped_val =~ s/\\/\\\\/g; # escape any Windows backslashes for upcoming regex
781 if (!defined($ENV{$var})) {
782 $ENV{$var} = "$val";
783 }
784 elsif($ENV{$var} !~ m/$escaped_val/) {
785 $ENV{$var} .= ";$val";
786 }
787 }
788 else {
789 if (!defined($ENV{$var})) {
790 $ENV{$var} = "$val";
791 }
792 elsif($ENV{$var} !~ m/$val/) {
793 $ENV{$var} .= ":$val";
794 }
795 }
796}
797
798
799# splits a filename into a prefix and a tail extension using the tail_re, or
800# if that fails, splits on the file_extension . (dot)
801sub get_prefix_and_tail_by_regex {
802
803 my ($filename,$tail_re) = @_;
804
805 my ($file_prefix,$file_ext) = ($filename =~ m/^(.*?)($tail_re)$/);
806 if ((!defined $file_prefix) || (!defined $file_ext)) {
807 ($file_prefix,$file_ext) = ($filename =~ m/^(.*)(\..*?)$/);
808 }
809
810 return ($file_prefix,$file_ext);
811}
812
813# get full path and file only path from a base_dir (which may be empty) and
814# file (which may contain directories)
815sub get_full_filenames {
816 my ($base_dir, $file) = @_;
817
818 my $filename_full_path = $file;
819 # add on directory if present
820 $filename_full_path = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\S/;
821
822 my $filename_no_path = $file;
823
824 # remove directory if present
825 $filename_no_path =~ s/^.*[\/\\]//;
826 return ($filename_full_path, $filename_no_path);
827}
828
829# returns the path of a file without the filename -- ie. the directory the file is in
830sub filename_head {
831 my $filename = shift(@_);
832
833 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
834 $filename =~ s/[^\\\\]*$//;
835 }
836 else {
837 $filename =~ s/[^\\\/]*$//;
838 }
839
840 return $filename;
841}
842
843
844# returns 1 if filename1 and filename2 point to the same
845# file or directory
846sub filenames_equal {
847 my ($filename1, $filename2) = @_;
848
849 # use filename_cat to clean up trailing slashes and
850 # multiple slashes
851 $filename1 = filename_cat ($filename1);
852 $filename2 = filename_cat ($filename2);
853
854 # filenames not case sensitive on windows
855 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
856 $filename1 =~ tr/[A-Z]/[a-z]/;
857 $filename2 =~ tr/[A-Z]/[a-z]/;
858 }
859 return 1 if $filename1 eq $filename2;
860 return 0;
861}
862
863sub filename_within_collection
864{
865 my ($filename) = @_;
866
867 my $collect_dir = $ENV{'GSDLCOLLECTDIR'};
868
869 if (defined $collect_dir) {
870 my $dirsep = &util::get_dirsep();
871 if ($collect_dir !~ m/$dirsep$/) {
872 $collect_dir .= $dirsep;
873 }
874
875 $collect_dir =~ s/\\/\\\\/g; # escape DOS style file separator
876
877 # if from within GSDLCOLLECTDIR, then remove directory prefix
878 # so source_filename is realative to it. This is done to aid
879 # portability, i.e. the collection can be moved to somewhere
880 # else on the file system and the archives directory will still
881 # work. This is needed, for example in the applet version of
882 # GLI where GSDLHOME/collect on the server will be different to
883 # the collect directory of the remove user. Of course,
884 # GSDLCOLLECTDIR subsequently needs to be put back on to turn
885 # it back into a full pathname.
886
887 if ($filename =~ /^$collect_dir(.*)$/) {
888 $filename = $1;
889 }
890 }
891
892 return $filename;
893}
894
895sub filename_is_absolute
896{
897 my ($filename) = @_;
898
899 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
900 return ($filename =~ m/^(\w:)?\\/);
901 }
902 else {
903 return ($filename =~ m/^\//);
904 }
905}
906
907
908## @method make_absolute()
909#
910# Ensure the given file path is absolute in respect to the given base path.
911#
912# @param $base_dir A string denoting the base path the given dir must be
913# absolute to.
914# @param $dir The directory to be made absolute as a string. Note that the
915# dir may already be absolute, in which case it will remain
916# unchanged.
917# @return The now absolute form of the directory as a string.
918#
919# @author John Thompson, DL Consulting Ltd.
920# @copy 2006 DL Consulting Ltd.
921#
922#used in buildcol.pl, doesn't work for all cases --kjdon
923sub make_absolute {
924
925 my ($base_dir, $dir) = @_;
926### print STDERR "dir = $dir\n";
927 $dir =~ s/[\\\/]+/\//g;
928 $dir = $base_dir . "/$dir" unless ($dir =~ m|^(\w:)?/|);
929 $dir =~ s|^/tmp_mnt||;
930 1 while($dir =~ s|/[^/]*/\.\./|/|g);
931 $dir =~ s|/[.][.]?/|/|g;
932 $dir =~ tr|/|/|s;
933### print STDERR "dir = $dir\n";
934
935 return $dir;
936}
937## make_absolute() ##
938
939sub get_dirsep {
940
941 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
942 return "\\";
943 } else {
944 return "\/";
945 }
946}
947
948sub get_os_dirsep {
949
950 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
951 return "\\\\";
952 } else {
953 return "\\\/";
954 }
955}
956
957sub get_re_dirsep {
958
959 return "\\\\|\\\/";
960}
961
962
963sub get_dirsep_tail {
964 my ($filename) = @_;
965
966 # returns last part of directory or filename
967 # On unix e.g. a/b.d => b.d
968 # a/b/c => c
969
970 my $dirsep = get_re_dirsep();
971 my @dirs = split (/$dirsep/, $filename);
972 my $tail = pop @dirs;
973
974 # - caused problems under windows
975 #my ($tail) = ($filename =~ m/^(?:.*?$dirsep)?(.*?)$/);
976
977 return $tail;
978}
979
980
981# if this is running on windows we want binaries to end in
982# .exe, otherwise they don't have to end in any extension
983sub get_os_exe {
984 return ".exe" if $ENV{'GSDLOS'} =~ /^windows$/i;
985 return "";
986}
987
988
989# test to see whether this is a big or little endian machine
990sub is_little_endian
991{
992 # To determine the name of the operating system, the variable $^O is a cheap alternative to pulling it out of the Config module;
993 # If it is a Macintosh machine (i.e. the Darwin operating system), regardless if it's running on the IBM power-pc cpu or the x86 Intel-based chip with a power-pc emulator running on top of it, it's big-endian
994 # Otherwise, it's little endian
995
996 #return 0 if $^O =~ /^darwin$/i;
997 #return 0 if $ENV{'GSDLOS'} =~ /^darwin$/i;
998
999 # Going back to stating exactly whether the machine is little endian
1000 # or big endian, without any special case for Macs. Since for rata it comes
1001 # back with little endian and for shuttle with bigendian.
1002 return (ord(substr(pack("s",1), 0, 1)) == 1);
1003}
1004
1005
1006# will return the collection name if successful, "" otherwise
1007sub use_collection {
1008 my ($collection, $collectdir) = @_;
1009
1010 if (!defined $collectdir || $collectdir eq "") {
1011 $collectdir = &filename_cat ($ENV{'GSDLHOME'}, "collect");
1012 }
1013
1014 # get and check the collection
1015 if (!defined($collection) || $collection eq "") {
1016 if (defined $ENV{'GSDLCOLLECTION'}) {
1017 $collection = $ENV{'GSDLCOLLECTION'};
1018 } else {
1019 print STDOUT "No collection specified\n";
1020 return "";
1021 }
1022 }
1023
1024 if ($collection eq "modelcol") {
1025 print STDOUT "You can't use modelcol.\n";
1026 return "";
1027 }
1028
1029 # make sure the environment variables GSDLCOLLECTION and GSDLCOLLECTDIR
1030 # are defined
1031 $ENV{'GSDLCOLLECTION'} = $collection;
1032 $ENV{'GSDLCOLLECTDIR'} = &filename_cat ($collectdir, $collection);
1033
1034 # make sure this collection exists
1035 if (!-e $ENV{'GSDLCOLLECTDIR'}) {
1036 print STDOUT "Invalid collection ($collection).\n";
1037 return "";
1038 }
1039
1040 # everything is ready to go
1041 return $collection;
1042}
1043
1044sub get_current_collection_name {
1045 return $ENV{'GSDLCOLLECTION'};
1046}
1047
1048
1049# will return the collection name if successful, "" otherwise.
1050# Like use_collection (above) but for greenstone 3 (taking account of site level)
1051
1052sub use_site_collection {
1053 my ($site, $collection, $collectdir) = @_;
1054
1055 if (!defined $collectdir || $collectdir eq "") {
1056 die "GSDL3HOME not set.\n" unless defined $ENV{'GSDL3HOME'};
1057 $collectdir = &filename_cat ($ENV{'GSDL3HOME'}, "sites", $site, "collect");
1058 }
1059
1060 # collectdir explicitly set by this point (using $site variable if required).
1061 # Can call "old" gsdl2 use_collection now.
1062
1063 return use_collection($collection,$collectdir);
1064}
1065
1066
1067
1068sub locate_config_file
1069{
1070 my ($file) = @_;
1071
1072 my $locations = locate_config_files($file);
1073
1074 return shift @$locations; # returns undef if 'locations' is empty
1075}
1076
1077
1078sub locate_config_files
1079{
1080 my ($file) = @_;
1081
1082 my @locations = ();
1083
1084 if (-e $file) {
1085 # Clearly specified (most likely full filename)
1086 # No need to hunt in 'etc' directories, return value unchanged
1087 push(@locations,$file);
1088 }
1089 else {
1090 # Check for collection specific one before looking in global GSDL 'etc'
1091 if (defined $ENV{'GSDLCOLLECTDIR'} && $ENV{'GSDLCOLLECTDIR'} ne "") {
1092 my $test_collect_etc_filename
1093 = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},"etc", $file);
1094
1095 if (-e $test_collect_etc_filename) {
1096 push(@locations,$test_collect_etc_filename);
1097 }
1098 }
1099 my $test_main_etc_filename
1100 = &util::filename_cat($ENV{'GSDLHOME'},"etc", $file);
1101 if (-e $test_main_etc_filename) {
1102 push(@locations,$test_main_etc_filename);
1103 }
1104 }
1105
1106 return \@locations;
1107}
1108
1109
1110sub hyperlink_text
1111{
1112 my ($text) = @_;
1113
1114 $text =~ s/(http:\/\/[^\s]+)/<a href=\"$1\">$1<\/a>/mg;
1115 $text =~ s/(^|\s+)(www\.(\w|\.)+)/<a href=\"http:\/\/$2\">$2<\/a>/mg;
1116
1117 return $text;
1118}
1119
1120
1121# A method to check if a directory is empty (note that an empty directory still has non-zero size!!!)
1122# Code is from http://episteme.arstechnica.com/eve/forums/a/tpc/f/6330927813/m/436007700831
1123sub is_dir_empty
1124{
1125 my ($path) = @_;
1126 opendir DIR, $path;
1127 while(my $entry = readdir DIR) {
1128 next if($entry =~ /^\.\.?$/);
1129 closedir DIR;
1130 return 0;
1131 }
1132 closedir DIR;
1133 return 1;
1134}
1135
1136# Returns the given filename converted using either URL encoding or base64
1137# encoding, as specified by $rename_method. If the given filename has no suffix
1138# (if it is just the tailname), then $no_suffix should be some defined value.
1139# rename_method can be url, none, base64
1140sub rename_file {
1141 my ($filename, $rename_method, $no_suffix) = @_;
1142
1143 if(!$filename) { # undefined or empty string
1144 return $filename;
1145 }
1146
1147 if (!$rename_method) {
1148 print STDERR "WARNING: no file renaming method specified. Defaulting to using URL encoding...\n";
1149 # Debugging information
1150 my ($cpackage,$cfilename,$cline,$csubr,$chas_args,$cwantarray) = caller(1);
1151 print STDERR "Called from method: $cfilename:$cline $cpackage->$csubr\n";
1152 $rename_method = "url";
1153 } elsif($rename_method eq "none") {
1154 return $filename; # would have already been renamed
1155 }
1156
1157 # No longer replace spaces with underscores, since underscores mess with incremental rebuild
1158 ### Replace spaces with underscore. Do this first else it can go wrong below when getting tailname
1159 ###$filename =~ s/ /_/g;
1160
1161 my ($tailname,$dirname,$suffix);
1162 if($no_suffix) { # given a tailname, no suffix
1163 ($tailname,$dirname) = File::Basename::fileparse($filename);
1164 }
1165 else {
1166 ($tailname,$dirname,$suffix) = File::Basename::fileparse($filename, "\\.(?:[^\\.]+?)\$");
1167 }
1168 $suffix = "" if !$suffix;
1169
1170 if ($rename_method eq "url") {
1171 $tailname = &unicode::url_encode($tailname);
1172 }
1173 elsif ($rename_method eq "base64") {
1174 $tailname = &unicode::base64_encode($tailname);
1175 $tailname =~ s/\s*//sg; # for some reason it adds spaces not just at end but also in middle
1176 }
1177
1178 $filename = "$tailname$suffix";
1179 $filename = "$dirname$filename" if ($dirname ne "./" && $dirname ne ".\\");
1180
1181 return $filename;
1182}
1183
1184
1185# BACKWARDS COMPATIBILITY: Just in case there are old .ldb/.bdb files
1186sub rename_ldb_or_bdb_file {
1187 my ($filename_no_ext) = @_;
1188
1189 my $new_filename = "$filename_no_ext.gdb";
1190 return if (-f $new_filename); # if the file has the right extension, don't need to do anything
1191 # try ldb
1192 my $old_filename = "$filename_no_ext.ldb";
1193
1194 if (-f $old_filename) {
1195 print STDERR "Renaming $old_filename to $new_filename\n";
1196 rename ($old_filename, $new_filename)
1197 || print STDERR "Rename failed: $!\n";
1198 return;
1199 }
1200 # try bdb
1201 $old_filename = "$filename_no_ext.bdb";
1202 if (-f $old_filename) {
1203 print STDERR "Renaming $old_filename to $new_filename\n";
1204 rename ($old_filename, $new_filename)
1205 || print STDERR "Rename failed: $!\n";
1206 return;
1207 }
1208}
1209
1210
1211# Returns the greenstone URL prefix extracted from the appropriate GS2/GS3 config file.
1212# By default, /greenstone3 for GS3 or /greenstone for GS2.
1213sub get_greenstone_url_prefix() {
1214 # if already set on a previous occasion, just return that
1215 # (Don't want to keep repeating this: cost of re-opening and scanning files.)
1216 return $ENV{'GREENSTONE_URL_PREFIX'} if($ENV{'GREENSTONE_URL_PREFIX'});
1217
1218 my ($configfile, $urlprefix, $defaultUrlprefix);
1219 my @propertynames = ();
1220
1221 if($ENV{'GSDL3SRCHOME'}) {
1222 $defaultUrlprefix = "/greenstone3";
1223 $configfile = &util::filename_cat($ENV{'GSDL3SRCHOME'}, "packages", "tomcat", "conf", "Catalina", "localhost", "greenstone3.xml");
1224 push(@propertynames, qw/path\s*\=/);
1225 } else {
1226 $defaultUrlprefix = "/greenstone";
1227 $configfile = &util::filename_cat($ENV{'GSDLHOME'}, "cgi-bin", "gsdlsite.cfg");
1228 push(@propertynames, (qw/\nhttpprefix/, qw/\ngwcgi/)); # inspect one property then the other
1229 }
1230
1231 $urlprefix = &extract_propvalue_from_file($configfile, \@propertynames);
1232
1233 if(!$urlprefix) { # no values found for URL prefix, use default values
1234 $urlprefix = $defaultUrlprefix;
1235 } else {
1236 #gwcgi can contain more than the wanted prefix, we split on / to get the first "directory" level
1237 $urlprefix =~ s/^\///; # remove the starting slash
1238 my @dirs = split(/(\\|\/)/, $urlprefix);
1239 $urlprefix = shift(@dirs);
1240
1241 if($urlprefix !~ m/^\//) { # in all cases: ensure the required forward slash is at the front
1242 $urlprefix = "/$urlprefix";
1243 }
1244 }
1245
1246 # set for the future
1247 $ENV{'GREENSTONE_URL_PREFIX'} = $urlprefix;
1248# print STDERR "*** in get_greenstone_url_prefix(): $urlprefix\n\n";
1249 return $urlprefix;
1250}
1251
1252
1253# Given a config file (xml or java properties file) and a list/array of regular expressions
1254# that represent property names to match on, this function will return the value for the 1st
1255# matching property name. If the return value is undefined, no matching property was found.
1256sub extract_propvalue_from_file() {
1257 my ($configfile, $propertynames) = @_;
1258
1259 my $value;
1260 unless(open(FIN, "<$configfile")) {
1261 print STDERR "extract_propvalue_from_file(): Unable to open $configfile. $!\n";
1262 return $value; # not initialised
1263 }
1264
1265 # Read the entire file at once, as one single line, then close it
1266 my $filecontents;
1267 {
1268 local $/ = undef;
1269 $filecontents = <FIN>;
1270 }
1271 close(FIN);
1272
1273 foreach my $regex (@$propertynames) {
1274 ($value) = $filecontents=~ m/$regex\s*(\S*)/s; # read value of the property given by regex up to the 1st space
1275 if($value) {
1276 $value =~ s/^\"//; # remove any startquotes
1277 $value =~ s/\".*$//; # remove the 1st endquotes (if any) followed by any xml
1278 last; # found value for a matching property, break from loop
1279 }
1280 }
1281
1282 return $value;
1283}
1284
1285
12861;
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