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a0d0e21e | 1 | package File::Find; |
07867069 | 2 | require 5.005; |
a0d0e21e | 3 | require Exporter; |
6280b799 | 4 | require Cwd; |
a0d0e21e | 5 | |
f06db76b AD |
6 | =head1 NAME |
7 | ||
8 | find - traverse a file tree | |
9 | ||
10 | finddepth - traverse a directory structure depth-first | |
11 | ||
12 | =head1 SYNOPSIS | |
13 | ||
14 | use File::Find; | |
81793b90 | 15 | find(\&wanted, '/foo', '/bar'); |
f06db76b | 16 | sub wanted { ... } |
237437d0 | 17 | |
f06db76b | 18 | use File::Find; |
81793b90 | 19 | finddepth(\&wanted, '/foo', '/bar'); |
f06db76b | 20 | sub wanted { ... } |
81793b90 GS |
21 | |
22 | use File::Find; | |
23 | find({ wanted => \&process, follow => 1 }, '.'); | |
f06db76b AD |
24 | |
25 | =head1 DESCRIPTION | |
26 | ||
20408e3c | 27 | The first argument to find() is either a hash reference describing the |
81793b90 | 28 | operations to be performed for each file, or a code reference. |
20408e3c | 29 | |
81793b90 GS |
30 | Here are the possible keys for the hash: |
31 | ||
32 | =over 3 | |
33 | ||
34 | =item C<wanted> | |
35 | ||
36 | The value should be a code reference. This code reference is called | |
37 | I<the wanted() function> below. | |
38 | ||
39 | =item C<bydepth> | |
40 | ||
41 | Reports the name of a directory only AFTER all its entries | |
42 | have been reported. Entry point finddepth() is a shortcut for | |
43 | specifying C<{ bydepth => 1 }> in the first argument of find(). | |
44 | ||
45 | =item C<follow> | |
46 | ||
47 | Causes symbolic links to be followed. Since directory trees with symbolic | |
48 | links (followed) may contain files more than once and may even have | |
49 | cycles, a hash has to be built up with an entry for each file. | |
50 | This might be expensive both in space and time for a large | |
51 | directory tree. See I<follow_fast> and I<follow_skip> below. | |
52 | If either I<follow> or I<follow_fast> is in effect: | |
53 | ||
54 | =over 6 | |
55 | ||
56 | =item | |
57 | ||
58 | It is guarantueed that an I<lstat> has been called before the user's | |
59 | I<wanted()> function is called. This enables fast file checks involving S< _>. | |
60 | ||
61 | =item | |
62 | ||
63 | There is a variable C<$File::Find::fullname> which holds the absolute | |
64 | pathname of the file with all symbolic links resolved | |
65 | ||
66 | =back | |
67 | ||
68 | =item C<follow_fast> | |
69 | ||
70 | This is similar to I<follow> except that it may report some files | |
71 | more than once. It does detect cycles however. | |
72 | Since only symbolic links have to be hashed, this is | |
73 | much cheaper both in space and time. | |
74 | If processing a file more than once (by the user's I<wanted()> function) | |
75 | is worse than just taking time, the option I<follow> should be used. | |
76 | ||
77 | =item C<follow_skip> | |
78 | ||
79 | C<follow_skip==1>, which is the default, causes all files which are | |
80 | neither directories nor symbolic links to be ignored if they are about | |
81 | to be processed a second time. If a directory or a symbolic link | |
82 | are about to be processed a second time, File::Find dies. | |
83 | C<follow_skip==0> causes File::Find to die if any file is about to be | |
84 | processed a second time. | |
85 | C<follow_skip==2> causes File::Find to ignore any duplicate files and | |
86 | dirctories but to proceed normally otherwise. | |
20408e3c | 87 | |
f06db76b | 88 | |
81793b90 GS |
89 | =item C<no_chdir> |
90 | ||
91 | Does not C<chdir()> to each directory as it recurses. The wanted() | |
92 | function will need to be aware of this, of course. In this case, | |
93 | C<$_> will be the same as C<$File::Find::name>. | |
94 | ||
95 | =item C<untaint> | |
96 | ||
97 | If find is used in taint-mode (-T command line switch or if EUID != UID | |
98 | or if EGID != GID) then internally directory names have to be untainted | |
99 | before they can be cd'ed to. Therefore they are checked against a regular | |
100 | expression I<untaint_pattern>. Note, that all names passed to the | |
101 | user's I<wanted()> function are still tainted. | |
102 | ||
103 | =item C<untaint_pattern> | |
104 | ||
105 | See above. This should be set using the C<qr> quoting operator. | |
106 | The default is set to C<qr|^([-+@\w./]+)$|>. | |
107 | Note that the paranthesis which are vital. | |
108 | ||
109 | =item C<untaint_skip> | |
110 | ||
111 | If set, directories (subtrees) which fail the I<untaint_pattern> | |
112 | are skipped. The default is to 'die' in such a case. | |
113 | ||
114 | =back | |
115 | ||
116 | The wanted() function does whatever verifications you want. | |
117 | C<$File::Find::dir> contains the current directory name, and C<$_> the | |
118 | current filename within that directory. C<$File::Find::name> contains | |
119 | the complete pathname to the file. You are chdir()'d to C<$File::Find::dir> when | |
120 | the function is called, unless C<no_chdir> was specified. | |
121 | When <follow> or <follow_fast> are in effect there is also a | |
122 | C<$File::Find::fullname>. | |
123 | The function may set C<$File::Find::prune> to prune the tree | |
124 | unless C<bydepth> was specified. | |
47a735e8 | 125 | |
20408e3c | 126 | This library is useful for the C<find2perl> tool, which when fed, |
f06db76b AD |
127 | |
128 | find2perl / -name .nfs\* -mtime +7 \ | |
81793b90 | 129 | -exec rm -f {} \; -o -fstype nfs -prune |
f06db76b AD |
130 | |
131 | produces something like: | |
132 | ||
133 | sub wanted { | |
134 | /^\.nfs.*$/ && | |
81793b90 | 135 | (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_)) && |
f06db76b AD |
136 | int(-M _) > 7 && |
137 | unlink($_) | |
138 | || | |
81793b90 | 139 | ($nlink || (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_))) && |
f06db76b | 140 | $dev < 0 && |
6280b799 | 141 | ($File::Find::prune = 1); |
f06db76b AD |
142 | } |
143 | ||
81793b90 | 144 | Set the variable C<$File::Find::dont_use_nlink> if you're using AFS, |
6280b799 | 145 | since AFS cheats. |
f06db76b | 146 | |
f06db76b AD |
147 | |
148 | Here's another interesting wanted function. It will find all symlinks | |
149 | that don't resolve: | |
150 | ||
151 | sub wanted { | |
81793b90 | 152 | -l && !-e && print "bogus link: $File::Find::name\n"; |
237437d0 | 153 | } |
f06db76b | 154 | |
81793b90 GS |
155 | See also the script C<pfind> on CPAN for a nice application of this |
156 | module. | |
157 | ||
158 | =head1 CAVEAT | |
159 | ||
160 | Be aware that the option to follow symblic links can be dangerous. | |
161 | Depending on the structure of the directory tree (including symbolic | |
162 | links to directories) you might traverse a given (physical) directory | |
163 | more than once (only if C<follow_fast> is in effect). | |
164 | Furthermore, deleting or changing files in a symbolically linked directory | |
165 | might cause very unpleasant surprises, since you delete or change files | |
166 | in an unknown directory. | |
0530a6c4 | 167 | |
0530a6c4 | 168 | |
f06db76b AD |
169 | =cut |
170 | ||
a0d0e21e | 171 | @ISA = qw(Exporter); |
6280b799 | 172 | @EXPORT = qw(find finddepth); |
173 | ||
a0d0e21e | 174 | |
81793b90 GS |
175 | use strict; |
176 | my $Is_VMS; | |
177 | ||
178 | require File::Basename; | |
179 | ||
180 | my %SLnkSeen; | |
181 | my ($wanted_callback, $avoid_nlink, $bydepth, $no_chdir, $follow, | |
182 | $follow_skip, $full_check, $untaint, $untaint_skip, $untaint_pat); | |
183 | ||
184 | sub contract_name { | |
185 | my ($cdir,$fn) = @_; | |
186 | ||
187 | return substr($cdir,0,rindex($cdir,'/')) if $fn eq '.'; | |
188 | ||
189 | $cdir = substr($cdir,0,rindex($cdir,'/')+1); | |
190 | ||
191 | $fn =~ s|^\./||; | |
192 | ||
193 | my $abs_name= $cdir . $fn; | |
194 | ||
195 | if (substr($fn,0,3) eq '../') { | |
196 | do 1 while ($abs_name=~ s|/(?>[^/]+)/\.\./|/|); | |
197 | } | |
198 | ||
199 | return $abs_name; | |
200 | } | |
201 | ||
202 | ||
203 | sub PathCombine($$) { | |
204 | my ($Base,$Name) = @_; | |
205 | my $AbsName; | |
206 | ||
207 | if (substr($Name,0,1) eq '/') { | |
208 | $AbsName= $Name; | |
209 | } | |
210 | else { | |
211 | $AbsName= contract_name($Base,$Name); | |
212 | } | |
213 | ||
214 | # (simple) check for recursion | |
215 | my $newlen= length($AbsName); | |
216 | if ($newlen <= length($Base)) { | |
217 | if (($newlen == length($Base) || substr($Base,$newlen,1) eq '/') | |
218 | && $AbsName eq substr($Base,0,$newlen)) | |
219 | { | |
220 | return undef; | |
221 | } | |
222 | } | |
223 | return $AbsName; | |
224 | } | |
225 | ||
226 | sub Follow_SymLink($) { | |
227 | my ($AbsName) = @_; | |
228 | ||
229 | my ($NewName,$DEV, $INO); | |
230 | ($DEV, $INO)= lstat $AbsName; | |
231 | ||
232 | while (-l _) { | |
233 | if ($SLnkSeen{$DEV, $INO}++) { | |
234 | if ($follow_skip < 2) { | |
235 | die "$AbsName is encountered a second time"; | |
a0d0e21e LW |
236 | } |
237 | else { | |
81793b90 | 238 | return undef; |
a0d0e21e LW |
239 | } |
240 | } | |
81793b90 GS |
241 | $NewName= PathCombine($AbsName, readlink($AbsName)); |
242 | unless(defined $NewName) { | |
243 | if ($follow_skip < 2) { | |
244 | die "$AbsName is a recursive symbolic link"; | |
245 | } | |
246 | else { | |
247 | return undef; | |
a0d0e21e | 248 | } |
81793b90 GS |
249 | } |
250 | else { | |
251 | $AbsName= $NewName; | |
252 | } | |
253 | ($DEV, $INO) = lstat($AbsName); | |
254 | return undef unless defined $DEV; # dangling symbolic link | |
255 | } | |
256 | ||
257 | if ($full_check && $SLnkSeen{$DEV, $INO}++) { | |
258 | if ($follow_skip < 1) { | |
259 | die "$AbsName encountered a second time"; | |
260 | } | |
261 | else { | |
262 | return undef; | |
263 | } | |
264 | } | |
265 | ||
266 | return $AbsName; | |
267 | } | |
268 | ||
269 | use vars qw/ $dir $name $fullname $prune /; | |
270 | sub _find_dir_symlnk($$$); | |
271 | sub _find_dir($$$); | |
272 | ||
273 | sub _find_opt { | |
274 | my $wanted = shift; | |
275 | die "invalid top directory" unless defined $_[0]; | |
276 | ||
277 | my $cwd = $wanted->{bydepth} ? Cwd::fastcwd() : Cwd::cwd(); | |
278 | my $cwd_untainted = $cwd; | |
279 | $wanted_callback = $wanted->{wanted}; | |
280 | $bydepth = $wanted->{bydepth}; | |
281 | $no_chdir = $wanted->{no_chdir}; | |
282 | $full_check = $wanted->{follow}; | |
283 | $follow = $full_check || $wanted->{follow_fast}; | |
284 | $follow_skip = $wanted->{follow_skip}; | |
285 | $untaint = $wanted->{untaint}; | |
286 | $untaint_pat = $wanted->{untaint_pattern}; | |
287 | $untaint_skip = $wanted->{untaint_skip}; | |
288 | ||
289 | ||
290 | # a symbolic link to a directory doesn't increase the link count | |
291 | $avoid_nlink = $follow || $File::Find::dont_use_nlink; | |
292 | ||
293 | if ( $untaint ) { | |
294 | $cwd_untainted= $1 if $cwd_untainted =~ m|$untaint_pat|; | |
295 | die "insecure cwd in find(depth)" unless defined($cwd_untainted); | |
296 | } | |
297 | ||
298 | my ($abs_dir, $nlink, $Is_Dir); | |
299 | ||
300 | Proc_Top_Item: | |
301 | foreach my $TOP (@_) { | |
302 | my $top_item = $TOP; | |
07867069 | 303 | $top_item =~ s|/$|| unless $top_item eq '/'; |
81793b90 GS |
304 | $Is_Dir= 0; |
305 | ||
306 | if ($follow) { | |
307 | if (substr($top_item,0,1) eq '/') { | |
308 | $abs_dir = $top_item; | |
309 | } | |
310 | elsif ($top_item eq '.') { | |
311 | $abs_dir = $cwd; | |
237437d0 | 312 | } |
81793b90 GS |
313 | else { # care about any ../ |
314 | $abs_dir = contract_name("$cwd/",$top_item); | |
315 | } | |
316 | $abs_dir= Follow_SymLink($abs_dir); | |
317 | unless (defined $abs_dir) { | |
318 | warn "$top_item is a dangling symbolic link\n"; | |
319 | next Proc_Top_Item; | |
320 | } | |
321 | if (-d _) { | |
322 | _find_dir_symlnk($wanted, $abs_dir, $top_item); | |
323 | $Is_Dir= 1; | |
324 | } | |
325 | } | |
326 | else { # no follow | |
327 | $nlink = (lstat $top_item)[3]; | |
328 | unless (defined $nlink) { | |
329 | warn "Can't stat $top_item: $!\n"; | |
330 | next Proc_Top_Item; | |
331 | } | |
332 | if (-d _) { | |
333 | $top_item =~ s/\.dir$// if $Is_VMS; | |
334 | _find_dir($wanted, $top_item, $nlink); | |
335 | $Is_Dir= 1; | |
336 | } | |
237437d0 | 337 | else { |
81793b90 GS |
338 | $abs_dir= $top_item; |
339 | } | |
340 | } | |
341 | ||
342 | unless ($Is_Dir) { | |
343 | unless (($_,$dir) = File::Basename::fileparse($abs_dir)) { | |
344 | ($dir,$_) = ('.', $top_item); | |
345 | } | |
346 | ||
347 | $abs_dir = $dir; | |
348 | if ($untaint) { | |
349 | my $abs_dir_save = $abs_dir; | |
350 | $abs_dir = $1 if $abs_dir =~ m|$untaint_pat|; | |
351 | unless (defined $abs_dir) { | |
352 | if ($untaint_skip == 0) { | |
353 | die "directory $abs_dir_save is still tainted"; | |
354 | } | |
355 | else { | |
356 | next Proc_Top_Item; | |
357 | } | |
358 | } | |
359 | } | |
360 | ||
361 | unless ($no_chdir or chdir $abs_dir) { | |
362 | warn "Couldn't chdir $abs_dir: $!\n"; | |
363 | next Proc_Top_Item; | |
364 | } | |
365 | ||
366 | $name = $abs_dir; | |
367 | ||
368 | &$wanted_callback; | |
369 | ||
370 | } | |
371 | ||
372 | $no_chdir or chdir $cwd_untainted; | |
373 | } | |
374 | } | |
375 | ||
376 | # API: | |
377 | # $wanted | |
378 | # $p_dir : "parent directory" | |
379 | # $nlink : what came back from the stat | |
380 | # preconditions: | |
381 | # chdir (if not no_chdir) to dir | |
382 | ||
383 | sub _find_dir($$$) { | |
384 | my ($wanted, $p_dir, $nlink) = @_; | |
385 | my ($CdLvl,$Level) = (0,0); | |
386 | my @Stack; | |
387 | my @filenames; | |
388 | my ($subcount,$sub_nlink); | |
389 | my $SE= []; | |
390 | my $dir_name= $p_dir; | |
07867069 | 391 | my $dir_pref= ( $p_dir eq '/' ? '/' : "$p_dir/" ); |
81793b90 GS |
392 | my $dir_rel= '.'; # directory name relative to current directory |
393 | ||
394 | local ($dir, $name, $prune, *DIR); | |
395 | ||
396 | unless ($no_chdir or $p_dir eq '.') { | |
397 | my $udir = $p_dir; | |
398 | if ($untaint) { | |
399 | $udir = $1 if $p_dir =~ m|$untaint_pat|; | |
400 | unless (defined $udir) { | |
401 | if ($untaint_skip == 0) { | |
402 | die "directory $p_dir is still tainted"; | |
403 | } | |
404 | else { | |
405 | return; | |
406 | } | |
237437d0 | 407 | } |
a0d0e21e | 408 | } |
81793b90 GS |
409 | unless (chdir $udir) { |
410 | warn "Can't cd to $udir: $!\n"; | |
411 | return; | |
412 | } | |
413 | } | |
414 | ||
415 | while (defined $SE) { | |
416 | unless ($bydepth) { | |
417 | $dir= $p_dir; | |
418 | $name= $dir_name; | |
419 | $_= ($no_chdir ? $dir_name : $dir_rel ); | |
420 | # prune may happen here | |
421 | $prune= 0; | |
422 | &$wanted_callback; | |
423 | next if $prune; | |
424 | } | |
425 | ||
426 | # change to that directory | |
427 | unless ($no_chdir or $dir_rel eq '.') { | |
428 | my $udir= $dir_rel; | |
429 | if ($untaint) { | |
430 | $udir = $1 if $dir_rel =~ m|$untaint_pat|; | |
431 | unless (defined $udir) { | |
432 | if ($untaint_skip == 0) { | |
07867069 HJ |
433 | die "directory (" |
434 | . ($p_dir ne '/' ? $p_dir : '') | |
435 | . "/) $dir_rel is still tainted"; | |
81793b90 GS |
436 | } |
437 | } | |
438 | } | |
439 | unless (chdir $udir) { | |
07867069 HJ |
440 | warn "Can't cd to (" |
441 | . ($p_dir ne '/' ? $p_dir : '') | |
442 | . "/) $udir : $!\n"; | |
81793b90 GS |
443 | next; |
444 | } | |
445 | $CdLvl++; | |
446 | } | |
447 | ||
448 | $dir= $dir_name; | |
449 | ||
450 | # Get the list of files in the current directory. | |
451 | unless (opendir DIR, ($no_chdir ? $dir_name : '.')) { | |
452 | warn "Can't opendir($dir_name): $!\n"; | |
453 | next; | |
454 | } | |
455 | @filenames = readdir DIR; | |
456 | closedir(DIR); | |
457 | ||
458 | if ($nlink == 2 && !$avoid_nlink) { | |
459 | # This dir has no subdirectories. | |
460 | for my $FN (@filenames) { | |
461 | next if $FN =~ /^\.{1,2}$/; | |
462 | ||
07867069 | 463 | $name = $dir_pref . $FN; |
81793b90 GS |
464 | $_ = ($no_chdir ? $name : $FN); |
465 | &$wanted_callback; | |
466 | } | |
467 | ||
468 | } | |
469 | else { | |
470 | # This dir has subdirectories. | |
471 | $subcount = $nlink - 2; | |
472 | ||
473 | for my $FN (@filenames) { | |
474 | next if $FN =~ /^\.{1,2}$/; | |
475 | if ($subcount > 0 || $avoid_nlink) { | |
476 | # Seen all the subdirs? | |
477 | # check for directoriness. | |
478 | # stat is faster for a file in the current directory | |
07867069 | 479 | $sub_nlink = (lstat ($no_chdir ? $dir_pref . $FN : $FN))[3]; |
81793b90 GS |
480 | |
481 | if (-d _) { | |
482 | --$subcount; | |
483 | $FN =~ s/\.dir$// if $Is_VMS; | |
484 | push @Stack,[$CdLvl,$dir_name,$FN,$sub_nlink]; | |
485 | } | |
486 | else { | |
07867069 | 487 | $name = $dir_pref . $FN; |
81793b90 GS |
488 | $_= ($no_chdir ? $name : $FN); |
489 | &$wanted_callback; | |
490 | } | |
491 | } | |
07867069 HJ |
492 | else { |
493 | $name = $dir_pref . $FN; | |
81793b90 GS |
494 | $_= ($no_chdir ? $name : $FN); |
495 | &$wanted_callback; | |
496 | } | |
497 | } | |
498 | } | |
499 | if ($bydepth) { | |
500 | $name = $dir_name; | |
501 | $dir = $p_dir; | |
502 | $_ = ($no_chdir ? $dir_name : $dir_rel ); | |
503 | &$wanted_callback; | |
504 | } | |
17b275ff RA |
505 | } |
506 | continue { | |
81793b90 GS |
507 | if ( defined ($SE = pop @Stack) ) { |
508 | ($Level, $p_dir, $dir_rel, $nlink) = @$SE; | |
509 | if ($CdLvl > $Level && !$no_chdir) { | |
510 | die "Can't cd to $dir_name" . '../' x ($CdLvl-$Level) | |
511 | unless chdir '../' x ($CdLvl-$Level); | |
512 | $CdLvl = $Level; | |
513 | } | |
07867069 HJ |
514 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); |
515 | $dir_pref = "$dir_name/"; | |
81793b90 | 516 | } |
a0d0e21e LW |
517 | } |
518 | } | |
519 | ||
81793b90 GS |
520 | |
521 | # API: | |
522 | # $wanted | |
523 | # $dir_loc : absolute location of a dir | |
524 | # $p_dir : "parent directory" | |
525 | # preconditions: | |
526 | # chdir (if not no_chdir) to dir | |
527 | ||
528 | sub _find_dir_symlnk($$$) { | |
529 | my ($wanted, $dir_loc, $p_dir) = @_; | |
530 | my @Stack; | |
531 | my @filenames; | |
532 | my $new_loc; | |
533 | my $SE = []; | |
534 | my $dir_name = $p_dir; | |
07867069 HJ |
535 | my $dir_pref = ( $p_dir eq '/' ? '/' : "$p_dir/" ); |
536 | my $loc_pref = ( $dir_loc eq '/' ? '/' : "$dir_loc/" ); | |
81793b90 GS |
537 | my $dir_rel = '.'; # directory name relative to current directory |
538 | ||
539 | local ($dir, $name, $fullname, $prune, *DIR); | |
540 | ||
541 | unless ($no_chdir or $p_dir eq '.') { | |
542 | my $udir = $dir_loc; | |
543 | if ($untaint) { | |
544 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; | |
545 | unless (defined $udir) { | |
546 | if ($untaint_skip == 0) { | |
547 | die "directory $dir_loc is still tainted"; | |
548 | } | |
549 | else { | |
550 | return; | |
551 | } | |
552 | } | |
553 | } | |
554 | unless (chdir $udir) { | |
555 | warn "Can't cd to $udir: $!\n"; | |
556 | return; | |
557 | } | |
558 | } | |
559 | ||
560 | while (defined $SE) { | |
561 | ||
562 | unless ($bydepth) { | |
563 | $dir= $p_dir; | |
564 | $name= $dir_name; | |
565 | $_= ($no_chdir ? $dir_name : $dir_rel ); | |
566 | $fullname= $dir_loc; | |
567 | # prune may happen here | |
568 | $prune= 0; | |
569 | &$wanted_callback; | |
570 | next if $prune; | |
571 | } | |
572 | ||
573 | # change to that directory | |
574 | unless ($no_chdir or $dir_rel eq '.') { | |
575 | my $udir = $dir_loc; | |
576 | if ($untaint) { | |
577 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; | |
578 | unless (defined $udir ) { | |
579 | if ($untaint_skip == 0) { | |
580 | die "directory $dir_loc is still tainted"; | |
a0d0e21e | 581 | } |
237437d0 | 582 | else { |
81793b90 | 583 | next; |
237437d0 | 584 | } |
a0d0e21e LW |
585 | } |
586 | } | |
81793b90 GS |
587 | unless (chdir $udir) { |
588 | warn "Can't cd to $udir: $!\n"; | |
589 | next; | |
590 | } | |
591 | } | |
592 | ||
593 | $dir = $dir_name; | |
594 | ||
595 | # Get the list of files in the current directory. | |
596 | unless (opendir DIR, ($no_chdir ? $dir_loc : '.')) { | |
597 | warn "Can't opendir($dir_loc): $!\n"; | |
598 | next; | |
599 | } | |
600 | @filenames = readdir DIR; | |
601 | closedir(DIR); | |
602 | ||
603 | for my $FN (@filenames) { | |
604 | next if $FN =~ /^\.{1,2}$/; | |
605 | ||
606 | # follow symbolic links / do an lstat | |
07867069 | 607 | $new_loc = Follow_SymLink($loc_pref.$FN); |
81793b90 GS |
608 | |
609 | # ignore if invalid symlink | |
610 | next unless defined $new_loc; | |
611 | ||
612 | if (-d _) { | |
613 | push @Stack,[$new_loc,$dir_name,$FN]; | |
614 | } | |
615 | else { | |
616 | $fullname = $new_loc; | |
07867069 | 617 | $name = $dir_pref . $FN; |
81793b90 GS |
618 | $_ = ($no_chdir ? $name : $FN); |
619 | &$wanted_callback; | |
620 | } | |
621 | } | |
622 | ||
623 | if ($bydepth) { | |
624 | $fullname = $dir_loc; | |
625 | $name = $dir_name; | |
626 | $_ = ($no_chdir ? $dir_name : $dir_rel); | |
627 | &$wanted_callback; | |
628 | } | |
629 | } | |
630 | continue { | |
631 | if (defined($SE = pop @Stack)) { | |
632 | ($dir_loc, $p_dir, $dir_rel) = @$SE; | |
07867069 HJ |
633 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); |
634 | $dir_pref = "$dir_name/"; | |
635 | $loc_pref = "$dir_loc/"; | |
a0d0e21e LW |
636 | } |
637 | } | |
638 | } | |
639 | ||
81793b90 | 640 | |
20408e3c | 641 | sub wrap_wanted { |
81793b90 GS |
642 | my $wanted = shift; |
643 | if ( ref($wanted) eq 'HASH' ) { | |
644 | if ( $wanted->{follow} || $wanted->{follow_fast}) { | |
645 | $wanted->{follow_skip} = 1 unless defined $wanted->{follow_skip}; | |
646 | } | |
647 | if ( $wanted->{untaint} ) { | |
648 | $wanted->{untaint_pattern} = qr|^([-+@\w./]+)$| | |
649 | unless defined $wanted->{untaint_pattern}; | |
650 | $wanted->{untaint_skip} = 0 unless defined $wanted->{untaint_skip}; | |
651 | } | |
652 | return $wanted; | |
653 | } | |
654 | else { | |
655 | return { wanted => $wanted }; | |
656 | } | |
a0d0e21e LW |
657 | } |
658 | ||
20408e3c | 659 | sub find { |
81793b90 GS |
660 | my $wanted = shift; |
661 | _find_opt(wrap_wanted($wanted), @_); | |
662 | %SLnkSeen= (); # free memory | |
a0d0e21e LW |
663 | } |
664 | ||
55d729e4 | 665 | sub finddepth { |
81793b90 GS |
666 | my $wanted = wrap_wanted(shift); |
667 | $wanted->{bydepth} = 1; | |
668 | _find_opt($wanted, @_); | |
669 | %SLnkSeen= (); # free memory | |
20408e3c | 670 | } |
6280b799 | 671 | |
672 | # These are hard-coded for now, but may move to hint files. | |
10eba763 | 673 | if ($^O eq 'VMS') { |
81793b90 GS |
674 | $Is_VMS = 1; |
675 | $File::Find::dont_use_nlink = 1; | |
748a9306 LW |
676 | } |
677 | ||
81793b90 | 678 | $File::Find::dont_use_nlink = 1 |
3e8584ad | 679 | if $^O eq 'os2' || $^O eq 'dos' || $^O eq 'amigaos' || $^O eq 'MSWin32'; |
6280b799 | 680 | |
20408e3c GS |
681 | # Set dont_use_nlink in your hint file if your system's stat doesn't |
682 | # report the number of links in a directory as an indication | |
683 | # of the number of files. | |
684 | # See, e.g. hints/machten.sh for MachTen 2.2. | |
81793b90 GS |
685 | unless ($File::Find::dont_use_nlink) { |
686 | require Config; | |
687 | $File::Find::dont_use_nlink = 1 if ($Config::Config{'dont_use_nlink'}); | |
20408e3c GS |
688 | } |
689 | ||
a0d0e21e | 690 | 1; |