source: gsdl/trunk/perllib/util.pm@ 18469

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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
251# copies a directory and its contents, excluding subdirectories, into a new directory
252sub cp_r_toplevel {
253 my $dest = pop (@_);
254 my (@srcfiles) = @_;
255
256 # a few sanity checks
257 if (scalar (@srcfiles) == 0) {
258 print STDERR "util::cp_r no destination directory given\n";
259 return;
260 } elsif (-f $dest) {
261 print STDERR "util::cp_r destination must be a directory\n";
262 return;
263 }
264
265 # create destination directory if it doesn't exist already
266 if (! -d $dest) {
267 my $store_umask = umask(0002);
268 mkdir ($dest, 0777);
269 umask($store_umask);
270 }
271
272 # copy the files
273 foreach my $file (@srcfiles) {
274
275 if (!-e $file) {
276 print STDERR "util::cp_r $file does not exist\n";
277
278 } elsif (-d $file) {
279 # make the new directory
280 my ($filename) = $file =~ /([^\\\/]*)$/;
281 $dest = &util::filename_cat ($dest, $filename);
282 my $store_umask = umask(0002);
283 mkdir ($dest, 0777);
284 umask($store_umask);
285
286 # get the contents of this directory
287 if (!opendir (INDIR, $file)) {
288 print STDERR "util::cp_r could not open directory $file\n";
289 } else {
290 my @filedir = readdir (INDIR);
291 closedir (INDIR);
292 foreach my $f (@filedir) {
293 next if $f =~ /^\.\.?$/;
294
295 # copy all the files in this directory, but not directories
296 my $ff = &util::filename_cat ($file, $f);
297 if (-f $ff) {
298 &cp($ff, $dest);
299 #&cp_r ($ff, $dest);
300 }
301 }
302 }
303
304 } else {
305 &cp($file, $dest);
306 }
307 }
308}
309
310sub mk_dir {
311 my ($dir) = @_;
312
313 my $store_umask = umask(0002);
314 my $mkdir_ok = mkdir ($dir, 0777);
315 umask($store_umask);
316
317 if (!$mkdir_ok)
318 {
319 print STDERR "util::mk_dir could not create directory $dir\n";
320 return;
321 }
322}
323
324# in case anyone cares - I did some testing (using perls Benchmark module)
325# on this subroutine against File::Path::mkpath (). mk_all_dir() is apparently
326# slightly faster (surprisingly) - Stefan.
327sub mk_all_dir {
328 my ($dir) = @_;
329
330 # use / for the directory separator, remove duplicate and
331 # trailing slashes
332 $dir=~s/[\\\/]+/\//g;
333 $dir=~s/[\\\/]+$//;
334
335 # make sure the cache directory exists
336 my $dirsofar = "";
337 my $first = 1;
338 foreach my $dirname (split ("/", $dir)) {
339 $dirsofar .= "/" unless $first;
340 $first = 0;
341
342 $dirsofar .= $dirname;
343
344 next if $dirname =~ /^(|[a-z]:)$/i;
345 if (!-e $dirsofar)
346 {
347 my $store_umask = umask(0002);
348 my $mkdir_ok = mkdir ($dirsofar, 0777);
349 umask($store_umask);
350 if (!$mkdir_ok)
351 {
352 print STDERR "util::mk_all_dir could not create directory $dirsofar\n";
353 return;
354 }
355 }
356 }
357}
358
359# make hard link to file if supported by OS, otherwise copy the file
360sub hard_link {
361 my ($src, $dest, $verbosity) = @_;
362
363 # remove trailing slashes from source and destination files
364 $src =~ s/[\\\/]+$//;
365 $dest =~ s/[\\\/]+$//;
366
367 # a few sanity checks
368 if (-e $dest) {
369 # destination file already exists
370 return;
371 }
372 elsif (!-e $src) {
373 print STDERR "util::hard_link source file $src does not exist\n";
374 return 1;
375 }
376 elsif (-d $src) {
377 print STDERR "util::hard_link source $src is a directory\n";
378 return 1;
379 }
380
381 my $dest_dir = &File::Basename::dirname($dest);
382 mk_all_dir($dest_dir) if (!-e $dest_dir);
383
384 # link not supported on windows 9x
385 if (($ENV{'GSDLOS'} =~ /^windows$/i) && (Win32::FsType() !~ /^ntfs$/i)) {
386 &File::Copy::copy ($src, $dest);
387
388 } elsif (!link($src, $dest)) {
389 if ((!defined $verbosity) || ($verbosity>2)) {
390 print STDERR "util::hard_link: unable to create hard link. ";
391 print STDERR " Copying file: $src -> $dest\n";
392 }
393 &File::Copy::copy ($src, $dest);
394 }
395 return 0;
396}
397
398# make soft link to file if supported by OS, otherwise copy file
399sub soft_link {
400 my ($src, $dest, $ensure_paths_absolute) = @_;
401
402 # remove trailing slashes from source and destination files
403 $src =~ s/[\\\/]+$//;
404 $dest =~ s/[\\\/]+$//;
405
406 # Ensure file paths are absolute IF requested to do so
407 # Soft_linking didn't work for relative paths
408 if(defined $ensure_paths_absolute && $ensure_paths_absolute) {
409 # We need to ensure that the src file is the absolute path
410 # See http://perldoc.perl.org/File/Spec.html
411 if(!File::Spec->file_name_is_absolute( $src )) { # it's relative
412 $src = File::Spec->rel2abs($src); # make absolute
413 }
414 # Might as well ensure that the destination file's absolute path is used
415 if(!File::Spec->file_name_is_absolute( $dest )) {
416 $dest = File::Spec->rel2abs($dest); # make absolute
417 }
418 }
419
420 # a few sanity checks
421 if (!-e $src) {
422 print STDERR "util::soft_link source file $src does not exist\n";
423 return 0;
424 }
425
426 my $dest_dir = &File::Basename::dirname($dest);
427 mk_all_dir($dest_dir) if (!-e $dest_dir);
428
429 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
430 # symlink not supported on windows
431 &File::Copy::copy ($src, $dest);
432
433 } elsif (!eval {symlink($src, $dest)}) {
434 print STDERR "util::soft_link: unable to create soft link.\n";
435 return 0;
436 }
437
438 return 1;
439}
440
441
442
443
444# updates a copy of a directory in some other part of the filesystem
445# verbosity settings are: 0=low, 1=normal, 2=high
446# both $fromdir and $todir should be absolute paths
447sub cachedir {
448 my ($fromdir, $todir, $verbosity) = @_;
449 $verbosity = 1 unless defined $verbosity;
450
451 # use / for the directory separator, remove duplicate and
452 # trailing slashes
453 $fromdir=~s/[\\\/]+/\//g;
454 $fromdir=~s/[\\\/]+$//;
455 $todir=~s/[\\\/]+/\//g;
456 $todir=~s/[\\\/]+$//;
457
458 &mk_all_dir ($todir);
459
460 # get the directories in ascending order
461 if (!opendir (FROMDIR, $fromdir)) {
462 print STDERR "util::cachedir could not read directory $fromdir\n";
463 return;
464 }
465 my @fromdir = grep (!/^\.\.?$/, sort(readdir (FROMDIR)));
466 closedir (FROMDIR);
467
468 if (!opendir (TODIR, $todir)) {
469 print STDERR "util::cacedir could not read directory $todir\n";
470 return;
471 }
472 my @todir = grep (!/^\.\.?$/, sort(readdir (TODIR)));
473 closedir (TODIR);
474
475 my $fromi = 0;
476 my $toi = 0;
477
478 while ($fromi < scalar(@fromdir) || $toi < scalar(@todir)) {
479# print "fromi: $fromi toi: $toi\n";
480
481 # see if we should delete a file/directory
482 # this should happen if the file/directory
483 # is not in the from list or if its a different
484 # size, or has an older timestamp
485 if ($toi < scalar(@todir)) {
486 if (($fromi >= scalar(@fromdir)) ||
487 ($todir[$toi] lt $fromdir[$fromi] ||
488 ($todir[$toi] eq $fromdir[$fromi] &&
489 &differentfiles("$fromdir/$fromdir[$fromi]","$todir/$todir[$toi]",
490 $verbosity)))) {
491
492 # the files are different
493 &rm_r("$todir/$todir[$toi]");
494 splice(@todir, $toi, 1); # $toi stays the same
495
496 } elsif ($todir[$toi] eq $fromdir[$fromi]) {
497 # the files are the same
498 # if it is a directory, check its contents
499 if (-d "$todir/$todir[$toi]") {
500 &cachedir ("$fromdir/$fromdir[$fromi]",
501 "$todir/$todir[$toi]", $verbosity);
502 }
503
504 $toi++;
505 $fromi++;
506 next;
507 }
508 }
509
510 # see if we should insert a file/directory
511 # we should insert a file/directory if there
512 # is no tofiles left or if the tofile does not exist
513 if ($fromi < scalar(@fromdir) && ($toi >= scalar(@todir) ||
514 $todir[$toi] gt $fromdir[$fromi])) {
515 &cp_r ("$fromdir/$fromdir[$fromi]", "$todir/$fromdir[$fromi]");
516 splice (@todir, $toi, 0, $fromdir[$fromi]);
517
518 $toi++;
519 $fromi++;
520 }
521 }
522}
523
524# this function returns -1 if either file is not found
525# assumes that $file1 and $file2 are absolute file names or
526# in the current directory
527# $file2 is allowed to be newer than $file1
528sub differentfiles {
529 my ($file1, $file2, $verbosity) = @_;
530 $verbosity = 1 unless defined $verbosity;
531
532 $file1 =~ s/\/+$//;
533 $file2 =~ s/\/+$//;
534
535 my ($file1name) = $file1 =~ /\/([^\/]*)$/;
536 my ($file2name) = $file2 =~ /\/([^\/]*)$/;
537
538 return -1 unless (-e $file1 && -e $file2);
539 if ($file1name ne $file2name) {
540 print STDERR "filenames are not the same\n" if ($verbosity >= 2);
541 return 1;
542 }
543
544 my @file1stat = stat ($file1);
545 my @file2stat = stat ($file2);
546
547 if (-d $file1) {
548 if (! -d $file2) {
549 print STDERR "one file is a directory\n" if ($verbosity >= 2);
550 return 1;
551 }
552 return 0;
553 }
554
555 # both must be regular files
556 unless (-f $file1 && -f $file2) {
557 print STDERR "one file is not a regular file\n" if ($verbosity >= 2);
558 return 1;
559 }
560
561 # the size of the files must be the same
562 if ($file1stat[7] != $file2stat[7]) {
563 print STDERR "different sized files\n" if ($verbosity >= 2);
564 return 1;
565 }
566
567 # the second file cannot be older than the first
568 if ($file1stat[9] > $file2stat[9]) {
569 print STDERR "file is older\n" if ($verbosity >= 2);
570 return 1;
571 }
572
573 return 0;
574}
575
576
577sub get_tmp_filename
578{
579 my $file_ext = shift(@_) || undef;
580
581 my $opt_dot_file_ext = (defined $file_ext) ? ".$file_ext" : "";
582
583 my $tmpdir = filename_cat($ENV{'GSDLHOME'}, "tmp");
584 &mk_all_dir ($tmpdir) unless -e $tmpdir;
585
586 my $count = 1000;
587 my $rand = int(rand $count);
588 my $full_tmp_filename = &filename_cat($tmpdir, "F$rand$opt_dot_file_ext");
589
590 while (-e $full_tmp_filename) {
591 $rand = int(rand $count);
592 $full_tmp_filename = &filename_cat($tmpdir, "F$rand$opt_dot_file_ext");
593 $count++;
594 }
595
596 return $full_tmp_filename;
597}
598
599sub filename_to_regex {
600 my $filename = shift (@_);
601
602 # need to put single backslash back to double so that regex works
603 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
604 $filename =~ s/\\/\\\\/g;
605 }
606 return $filename;
607}
608
609sub filename_cat {
610 my $first_file = shift(@_);
611 my (@filenames) = @_;
612
613# Useful for debugging
614# -- might make sense to call caller(0) rather than (1)??
615# my ($cpackage,$cfilename,$cline,$csubr,$chas_args,$cwantarray) = caller(1);
616# print STDERR "Calling method; $cfilename:$cline $cpackage->$csubr\n";
617
618 # Check for empty first filename
619 if ($first_file =~ /\S/) {
620 unshift(@filenames, $first_file);
621 }
622
623 my $filename = join("/", @filenames);
624
625 # remove duplicate slashes and remove the last slash
626 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
627 $filename =~ s/[\\\/]+/\\/g;
628 } else {
629 $filename =~ s/[\/]+/\//g;
630 # DB: want a filename abc\de.html to remain like this
631 }
632 $filename =~ s/[\\\/]$//;
633
634 return $filename;
635}
636
637
638sub envvar_prepend {
639 my ($var,$val) = @_;
640
641 # do not prepend any value/path that's already in the environment variable
642 if ($ENV{'GSDLOS'} =~ /^windows$/i)
643 {
644 my $escaped_val = $val;
645 $escaped_val =~ s/\\/\\\\/g; # escape any Windows backslashes for upcoming regex
646 if($ENV{$var} !~ m/$escaped_val/) {
647 $ENV{$var} = "$val;".$ENV{$var};
648 }
649 }
650 else {
651 if($ENV{$var} !~ m/$val/) {
652 $ENV{$var} = "$val:".$ENV{$var};
653 }
654 }
655}
656
657sub envvar_append {
658 my ($var,$val) = @_;
659
660 # do not append any value/path that's already in the environment variable
661 if ($ENV{'GSDLOS'} =~ /^windows$/i)
662 {
663 my $escaped_val = $val;
664 $escaped_val =~ s/\\/\\\\/g; # escape any Windows backslashes for upcoming regex
665 if($ENV{$var} !~ m/$escaped_val/) {
666 $ENV{$var} .= ";$val";
667 }
668 }
669 else {
670 if($ENV{$var} !~ m/$val/) {
671 $ENV{$var} .= ":$val";
672 }
673 }
674}
675
676
677# splits a filename into a prefix and a tail extension using the tail_re, or
678# if that fails, splits on the file_extension . (dot)
679sub get_prefix_and_tail_by_regex {
680
681 my ($filename,$tail_re) = @_;
682
683 my ($file_prefix,$file_ext) = ($filename =~ m/^(.*?)($tail_re)$/);
684 if ((!defined $file_prefix) || (!defined $file_ext)) {
685 ($file_prefix,$file_ext) = ($filename =~ m/^(.*)(\..*?)$/);
686 }
687
688 return ($file_prefix,$file_ext);
689}
690
691# get full path and file only path from a base_dir (which may be empty) and
692# file (which may contain directories)
693sub get_full_filenames {
694 my ($base_dir, $file) = @_;
695
696 my $filename_full_path = $file;
697 # add on directory if present
698 $filename_full_path = &util::filename_cat ($base_dir, $file) if $base_dir =~ /\S/;
699
700 my $filename_no_path = $file;
701
702 # remove directory if present
703 $filename_no_path =~ s/^.*[\/\\]//;
704 return ($filename_full_path, $filename_no_path);
705}
706
707# returns the path of a file without the filename -- ie. the directory the file is in
708sub filename_head {
709 my $filename = shift(@_);
710
711 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
712 $filename =~ s/[^\\\\]*$//;
713 }
714 else {
715 $filename =~ s/[^\\\/]*$//;
716 }
717
718 return $filename;
719}
720
721
722# returns 1 if filename1 and filename2 point to the same
723# file or directory
724sub filenames_equal {
725 my ($filename1, $filename2) = @_;
726
727 # use filename_cat to clean up trailing slashes and
728 # multiple slashes
729 $filename1 = filename_cat ($filename1);
730 $filename2 = filename_cat ($filename2);
731
732 # filenames not case sensitive on windows
733 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
734 $filename1 =~ tr/[A-Z]/[a-z]/;
735 $filename2 =~ tr/[A-Z]/[a-z]/;
736 }
737 return 1 if $filename1 eq $filename2;
738 return 0;
739}
740
741sub filename_within_collection
742{
743 my ($filename) = @_;
744
745 my $collect_dir = $ENV{'GSDLCOLLECTDIR'};
746
747 if (defined $collect_dir) {
748 my $dirsep = &util::get_dirsep();
749 if ($collect_dir !~ m/$dirsep$/) {
750 $collect_dir .= $dirsep;
751 }
752
753 $collect_dir =~ s/\\/\\\\/g; # escape DOS style file separator
754
755 # if from within GSDLCOLLECTDIR, then remove directory prefix
756 # so source_filename is realative to it. This is done to aid
757 # portability, i.e. the collection can be moved to somewhere
758 # else on the file system and the archives directory will still
759 # work. This is needed, for example in the applet version of
760 # GLI where GSDLHOME/collect on the server will be different to
761 # the collect directory of the remove user. Of course,
762 # GSDLCOLLECTDIR subsequently needs to be put back on to turn
763 # it back into a full pathname.
764
765 if ($filename =~ /^$collect_dir(.*)$/) {
766 $filename = $1;
767 }
768 }
769
770 return $filename;
771}
772
773sub filename_is_absolute
774{
775 my ($filename) = @_;
776
777 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
778 return ($filename =~ m/^(\w:)?\\/);
779 }
780 else {
781 return ($filename =~ m/^\//);
782 }
783}
784
785
786## @method make_absolute()
787#
788# Ensure the given file path is absolute in respect to the given base path.
789#
790# @param $base_dir A string denoting the base path the given dir must be
791# absolute to.
792# @param $dir The directory to be made absolute as a string. Note that the
793# dir may already be absolute, in which case it will remain
794# unchanged.
795# @return The now absolute form of the directory as a string.
796#
797# @author John Thompson, DL Consulting Ltd.
798# @copy 2006 DL Consulting Ltd.
799#
800#used in buildcol.pl, doesn't work for all cases --kjdon
801sub make_absolute {
802
803 my ($base_dir, $dir) = @_;
804### print STDERR "dir = $dir\n";
805 $dir =~ s/[\\\/]+/\//g;
806 $dir = $base_dir . "/$dir" unless ($dir =~ m|^(\w:)?/|);
807 $dir =~ s|^/tmp_mnt||;
808 1 while($dir =~ s|/[^/]*/\.\./|/|g);
809 $dir =~ s|/[.][.]?/|/|g;
810 $dir =~ tr|/|/|s;
811### print STDERR "dir = $dir\n";
812
813 return $dir;
814}
815## make_absolute() ##
816
817sub get_dirsep {
818
819 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
820 return "\\";
821 } else {
822 return "\/";
823 }
824}
825
826sub get_os_dirsep {
827
828 if ($ENV{'GSDLOS'} =~ /^windows$/i) {
829 return "\\\\";
830 } else {
831 return "\\\/";
832 }
833}
834
835sub get_re_dirsep {
836
837 return "\\\\|\\\/";
838}
839
840
841sub get_dirsep_tail {
842 my ($filename) = @_;
843
844 # returns last part of directory or filename
845 # On unix e.g. a/b.d => b.d
846 # a/b/c => c
847
848 my $dirsep = get_re_dirsep();
849 my @dirs = split (/$dirsep/, $filename);
850 my $tail = pop @dirs;
851
852 # - caused problems under windows
853 #my ($tail) = ($filename =~ m/^(?:.*?$dirsep)?(.*?)$/);
854
855 return $tail;
856}
857
858
859# if this is running on windows we want binaries to end in
860# .exe, otherwise they don't have to end in any extension
861sub get_os_exe {
862 return ".exe" if $ENV{'GSDLOS'} =~ /^windows$/i;
863 return "";
864}
865
866
867# test to see whether this is a big or little endian machine
868sub is_little_endian
869{
870 # To determine the name of the operating system, the variable $^O is a cheap alternative to pulling it out of the Config module;
871 # 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
872 # Otherwise, it's little endian
873
874 #return 0 if $^O =~ /^darwin$/i;
875 #return 0 if $ENV{'GSDLOS'} =~ /^darwin$/i;
876
877 # Going back to stating exactly whether the machine is little endian
878 # or big endian, without any special case for Macs. Since for rata it comes
879 # back with little endian and for shuttle with bigendian.
880 return (ord(substr(pack("s",1), 0, 1)) == 1);
881}
882
883
884# will return the collection name if successful, "" otherwise
885sub use_collection {
886 my ($collection, $collectdir) = @_;
887
888 if (!defined $collectdir || $collectdir eq "") {
889 $collectdir = &filename_cat ($ENV{'GSDLHOME'}, "collect");
890 }
891
892 # get and check the collection
893 if (!defined($collection) || $collection eq "") {
894 if (defined $ENV{'GSDLCOLLECTION'}) {
895 $collection = $ENV{'GSDLCOLLECTION'};
896 } else {
897 print STDOUT "No collection specified\n";
898 return "";
899 }
900 }
901
902 if ($collection eq "modelcol") {
903 print STDOUT "You can't use modelcol.\n";
904 return "";
905 }
906
907 # make sure the environment variables GSDLCOLLECTION and GSDLCOLLECTDIR
908 # are defined
909 $ENV{'GSDLCOLLECTION'} = $collection;
910 $ENV{'GSDLCOLLECTDIR'} = &filename_cat ($collectdir, $collection);
911
912 # make sure this collection exists
913 if (!-e $ENV{'GSDLCOLLECTDIR'}) {
914 print STDOUT "Invalid collection ($collection).\n";
915 return "";
916 }
917
918 # everything is ready to go
919 return $collection;
920}
921
922
923
924
925# will return the collection name if successful, "" otherwise.
926# Like use_collection (above) but for greenstone 3 (taking account of site level)
927
928sub use_site_collection {
929 my ($site, $collection, $collectdir) = @_;
930
931 if (!defined $collectdir || $collectdir eq "") {
932 die "GSDL3HOME not set.\n" unless defined $ENV{'GSDL3HOME'};
933 $collectdir = &filename_cat ($ENV{'GSDL3HOME'}, "sites", $site, "collect");
934 }
935
936 # collectdir explicitly set by this point (using $site variable if required).
937 # Can call "old" gsdl2 use_collection now.
938
939 return use_collection($collection,$collectdir);
940}
941
942
943
944sub locate_config_file
945{
946 my ($file) = @_;
947
948 my $locations = locate_config_files($file);
949
950 return shift @$locations; # returns undef if 'locations' is empty
951}
952
953
954sub locate_config_files
955{
956 my ($file) = @_;
957
958 my @locations = ();
959
960 if (-e $file) {
961 # Clearly specified (most likely full filename)
962 # No need to hunt in 'etc' directories, return value unchanged
963 push(@locations,$file);
964 }
965 else {
966 # Check for collection specific one before looking in global GSDL 'etc'
967 if (defined $ENV{'GSDLCOLLECTDIR'} && $ENV{'GSDLCOLLECTDIR'} ne "") {
968 my $test_collect_etc_filename
969 = &util::filename_cat($ENV{'GSDLCOLLECTDIR'},"etc", $file);
970
971 if (-e $test_collect_etc_filename) {
972 push(@locations,$test_collect_etc_filename);
973 }
974 }
975 my $test_main_etc_filename
976 = &util::filename_cat($ENV{'GSDLHOME'},"etc", $file);
977 if (-e $test_main_etc_filename) {
978 push(@locations,$test_main_etc_filename);
979 }
980 }
981
982 return \@locations;
983}
984
985
986sub hyperlink_text
987{
988 my ($text) = @_;
989
990 $text =~ s/(http:\/\/[^\s]+)/<a href=\"$1\">$1<\/a>/mg;
991 $text =~ s/(^|\s+)(www\.(\w|\.)+)/<a href=\"http:\/\/$2\">$2<\/a>/mg;
992
993 return $text;
994}
995
996
997# A method to check if a directory is empty (note that an empty directory still has non-zero size!!!)
998# Code is from http://episteme.arstechnica.com/eve/forums/a/tpc/f/6330927813/m/436007700831
999sub is_dir_empty
1000{
1001 my ($path) = @_;
1002 opendir DIR, $path;
1003 while(my $entry = readdir DIR) {
1004 next if($entry =~ /^\.\.?$/);
1005 closedir DIR;
1006 return 0;
1007 }
1008 closedir DIR;
1009 return 1;
1010}
1011
1012# Returns the given filename converted using either URL encoding or base64
1013# encoding, as specified by $rename_method. If the given filename has no suffix
1014# (if it is just the tailname), then $no_suffix should be some defined value.
1015sub rename_file {
1016 my ($filename, $rename_method, $no_suffix) = @_;
1017
1018 if(!$filename) { # undefined or empty string
1019 return $filename;
1020 }
1021
1022 # Replace spaces with underscore.
1023 # Do this first else it can go wrong below when getting tailname
1024 $filename =~ s/ /_/g;
1025
1026 my ($tailname,$dirname,$suffix);
1027 if($no_suffix) { # given a tailname, no suffix
1028 ($tailname,$dirname) = File::Basename::fileparse($filename);
1029 }
1030 else {
1031 ($tailname,$dirname,$suffix) = File::Basename::fileparse($filename, "\\.(?:[^\\.]+?)\$");
1032 }
1033 $suffix = "" if !$suffix;
1034
1035 if (!$rename_method) {
1036 print STDERR "WARNING: no file renaming method specified. Defaulting to using URL encoding...\n";
1037 # Debugging information
1038 my ($cpackage,$cfilename,$cline,$csubr,$chas_args,$cwantarray) = caller(1);
1039 print STDERR "Calling method: $cfilename:$cline $cpackage->$csubr\n";
1040 } elsif($rename_method eq "none") {
1041 return $filename; # would have already been renamed
1042 }
1043
1044 if (!$rename_method || $rename_method eq "url") {
1045 $tailname = &unicode::url_encode($tailname);
1046 }
1047 elsif ($rename_method eq "base64") {
1048 $tailname = &unicode::base64_encode($tailname);
1049 $tailname =~ s/\s*//sg; # for some reason it adds spaces not just at end but also in middle
1050 }
1051
1052 $filename = "$tailname$suffix";
1053 $filename = "$dirname$filename" if ($dirname ne "./" && $dirname ne ".\\");
1054
1055 return $filename;
1056}
1057
10581;
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