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1 | package File::Find; |
2 | use 5.006; | |
3 | use strict; | |
4 | use warnings; | |
5 | use warnings::register; | |
6 | our $VERSION = '1.10'; | |
7 | require Exporter; | |
8 | require Cwd; | |
9 | ||
10 | # | |
11 | # Modified to ensure sub-directory traversal order is not inverded by stack | |
12 | # push and pops. That is remains in the same order as in the directory file, | |
13 | # or user pre-processing (EG:sorted). | |
14 | # | |
15 | ||
16 | =head1 NAME | |
17 | ||
18 | File::Find - Traverse a directory tree. | |
19 | ||
20 | =head1 SYNOPSIS | |
21 | ||
22 | use File::Find; | |
23 | find(\&wanted, @directories_to_search); | |
24 | sub wanted { ... } | |
25 | ||
26 | use File::Find; | |
27 | finddepth(\&wanted, @directories_to_search); | |
28 | sub wanted { ... } | |
29 | ||
30 | use File::Find; | |
31 | find({ wanted => \&process, follow => 1 }, '.'); | |
32 | ||
33 | =head1 DESCRIPTION | |
34 | ||
35 | These are functions for searching through directory trees doing work | |
36 | on each file found similar to the Unix I<find> command. File::Find | |
37 | exports two functions, C<find> and C<finddepth>. They work similarly | |
38 | but have subtle differences. | |
39 | ||
40 | =over 4 | |
41 | ||
42 | =item B<find> | |
43 | ||
44 | find(\&wanted, @directories); | |
45 | find(\%options, @directories); | |
46 | ||
47 | C<find()> does a depth-first search over the given C<@directories> in | |
48 | the order they are given. For each file or directory found, it calls | |
49 | the C<&wanted> subroutine. (See below for details on how to use the | |
50 | C<&wanted> function). Additionally, for each directory found, it will | |
51 | C<chdir()> into that directory and continue the search, invoking the | |
52 | C<&wanted> function on each file or subdirectory in the directory. | |
53 | ||
54 | =item B<finddepth> | |
55 | ||
56 | finddepth(\&wanted, @directories); | |
57 | finddepth(\%options, @directories); | |
58 | ||
59 | C<finddepth()> works just like C<find()> except that is invokes the | |
60 | C<&wanted> function for a directory I<after> invoking it for the | |
61 | directory's contents. It does a postorder traversal instead of a | |
62 | preorder traversal, working from the bottom of the directory tree up | |
63 | where C<find()> works from the top of the tree down. | |
64 | ||
65 | =back | |
66 | ||
67 | =head2 %options | |
68 | ||
69 | The first argument to C<find()> is either a code reference to your | |
70 | C<&wanted> function, or a hash reference describing the operations | |
71 | to be performed for each file. The | |
72 | code reference is described in L<The wanted function> below. | |
73 | ||
74 | Here are the possible keys for the hash: | |
75 | ||
76 | =over 3 | |
77 | ||
78 | =item C<wanted> | |
79 | ||
80 | The value should be a code reference. This code reference is | |
81 | described in L<The wanted function> below. | |
82 | ||
83 | =item C<bydepth> | |
84 | ||
85 | Reports the name of a directory only AFTER all its entries | |
86 | have been reported. Entry point C<finddepth()> is a shortcut for | |
87 | specifying C<<{ bydepth => 1 }>> in the first argument of C<find()>. | |
88 | ||
89 | =item C<preprocess> | |
90 | ||
91 | The value should be a code reference. This code reference is used to | |
92 | preprocess the current directory. The name of the currently processed | |
93 | directory is in C<$File::Find::dir>. Your preprocessing function is | |
94 | called after C<readdir()>, but before the loop that calls the C<wanted()> | |
95 | function. It is called with a list of strings (actually file/directory | |
96 | names) and is expected to return a list of strings. The code can be | |
97 | used to sort the file/directory names alphabetically, numerically, | |
98 | or to filter out directory entries based on their name alone. When | |
99 | I<follow> or I<follow_fast> are in effect, C<preprocess> is a no-op. | |
100 | ||
101 | =item C<postprocess> | |
102 | ||
103 | The value should be a code reference. It is invoked just before leaving | |
104 | the currently processed directory. It is called in void context with no | |
105 | arguments. The name of the current directory is in C<$File::Find::dir>. This | |
106 | hook is handy for summarizing a directory, such as calculating its disk | |
107 | usage. When I<follow> or I<follow_fast> are in effect, C<postprocess> is a | |
108 | no-op. | |
109 | ||
110 | =item C<follow> | |
111 | ||
112 | Causes symbolic links to be followed. Since directory trees with symbolic | |
113 | links (followed) may contain files more than once and may even have | |
114 | cycles, a hash has to be built up with an entry for each file. | |
115 | This might be expensive both in space and time for a large | |
116 | directory tree. See I<follow_fast> and I<follow_skip> below. | |
117 | If either I<follow> or I<follow_fast> is in effect: | |
118 | ||
119 | =over 6 | |
120 | ||
121 | =item * | |
122 | ||
123 | It is guaranteed that an I<lstat> has been called before the user's | |
124 | C<wanted()> function is called. This enables fast file checks involving S<_>. | |
125 | Note that this guarantee no longer holds if I<follow> or I<follow_fast> | |
126 | are not set. | |
127 | ||
128 | =item * | |
129 | ||
130 | There is a variable C<$File::Find::fullname> which holds the absolute | |
131 | pathname of the file with all symbolic links resolved. If the link is | |
132 | a dangling symbolic link, then fullname will be set to C<undef>. | |
133 | ||
134 | =back | |
135 | ||
136 | This is a no-op on Win32. | |
137 | ||
138 | =item C<follow_fast> | |
139 | ||
140 | This is similar to I<follow> except that it may report some files more | |
141 | than once. It does detect cycles, however. Since only symbolic links | |
142 | have to be hashed, this is much cheaper both in space and time. If | |
143 | processing a file more than once (by the user's C<wanted()> function) | |
144 | is worse than just taking time, the option I<follow> should be used. | |
145 | ||
146 | This is also a no-op on Win32. | |
147 | ||
148 | =item C<follow_skip> | |
149 | ||
150 | C<follow_skip==1>, which is the default, causes all files which are | |
151 | neither directories nor symbolic links to be ignored if they are about | |
152 | to be processed a second time. If a directory or a symbolic link | |
153 | are about to be processed a second time, File::Find dies. | |
154 | ||
155 | C<follow_skip==0> causes File::Find to die if any file is about to be | |
156 | processed a second time. | |
157 | ||
158 | C<follow_skip==2> causes File::Find to ignore any duplicate files and | |
159 | directories but to proceed normally otherwise. | |
160 | ||
161 | =item C<dangling_symlinks> | |
162 | ||
163 | If true and a code reference, will be called with the symbolic link | |
164 | name and the directory it lives in as arguments. Otherwise, if true | |
165 | and warnings are on, warning "symbolic_link_name is a dangling | |
166 | symbolic link\n" will be issued. If false, the dangling symbolic link | |
167 | will be silently ignored. | |
168 | ||
169 | =item C<no_chdir> | |
170 | ||
171 | Does not C<chdir()> to each directory as it recurses. The C<wanted()> | |
172 | function will need to be aware of this, of course. In this case, | |
173 | C<$_> will be the same as C<$File::Find::name>. | |
174 | ||
175 | =item C<untaint> | |
176 | ||
177 | If find is used in taint-mode (-T command line switch or if EUID != UID | |
178 | or if EGID != GID) then internally directory names have to be untainted | |
179 | before they can be chdir'ed to. Therefore they are checked against a regular | |
180 | expression I<untaint_pattern>. Note that all names passed to the user's | |
181 | I<wanted()> function are still tainted. If this option is used while | |
182 | not in taint-mode, C<untaint> is a no-op. | |
183 | ||
184 | =item C<untaint_pattern> | |
185 | ||
186 | See above. This should be set using the C<qr> quoting operator. | |
187 | The default is set to C<qr|^([-+@\w./]+)$|>. | |
188 | Note that the parentheses are vital. | |
189 | ||
190 | =item C<untaint_skip> | |
191 | ||
192 | If set, a directory which fails the I<untaint_pattern> is skipped, | |
193 | including all its sub-directories. The default is to 'die' in such a case. | |
194 | ||
195 | =back | |
196 | ||
197 | =head2 The wanted function | |
198 | ||
199 | The C<wanted()> function does whatever verifications you want on | |
200 | each file and directory. Note that despite its name, the C<wanted()> | |
201 | function is a generic callback function, and does B<not> tell | |
202 | File::Find if a file is "wanted" or not. In fact, its return value | |
203 | is ignored. | |
204 | ||
205 | The wanted function takes no arguments but rather does its work | |
206 | through a collection of variables. | |
207 | ||
208 | =over 4 | |
209 | ||
210 | =item C<$File::Find::dir> is the current directory name, | |
211 | ||
212 | =item C<$_> is the current filename within that directory | |
213 | ||
214 | =item C<$File::Find::name> is the complete pathname to the file. | |
215 | ||
216 | =back | |
217 | ||
218 | Don't modify these variables. | |
219 | ||
220 | For example, when examining the file F</some/path/foo.ext> you will have: | |
221 | ||
222 | $File::Find::dir = /some/path/ | |
223 | $_ = foo.ext | |
224 | $File::Find::name = /some/path/foo.ext | |
225 | ||
226 | You are chdir()'d to C<$File::Find::dir> when the function is called, | |
227 | unless C<no_chdir> was specified. Note that when changing to | |
228 | directories is in effect the root directory (F</>) is a somewhat | |
229 | special case inasmuch as the concatenation of C<$File::Find::dir>, | |
230 | C<'/'> and C<$_> is not literally equal to C<$File::Find::name>. The | |
231 | table below summarizes all variants: | |
232 | ||
233 | $File::Find::name $File::Find::dir $_ | |
234 | default / / . | |
235 | no_chdir=>0 /etc / etc | |
236 | /etc/x /etc x | |
237 | ||
238 | no_chdir=>1 / / / | |
239 | /etc / /etc | |
240 | /etc/x /etc /etc/x | |
241 | ||
242 | ||
243 | When <follow> or <follow_fast> are in effect, there is | |
244 | also a C<$File::Find::fullname>. The function may set | |
245 | C<$File::Find::prune> to prune the tree unless C<bydepth> was | |
246 | specified. Unless C<follow> or C<follow_fast> is specified, for | |
247 | compatibility reasons (find.pl, find2perl) there are in addition the | |
248 | following globals available: C<$File::Find::topdir>, | |
249 | C<$File::Find::topdev>, C<$File::Find::topino>, | |
250 | C<$File::Find::topmode> and C<$File::Find::topnlink>. | |
251 | ||
252 | This library is useful for the C<find2perl> tool, which when fed, | |
253 | ||
254 | find2perl / -name .nfs\* -mtime +7 \ | |
255 | -exec rm -f {} \; -o -fstype nfs -prune | |
256 | ||
257 | produces something like: | |
258 | ||
259 | sub wanted { | |
260 | /^\.nfs.*\z/s && | |
261 | (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_)) && | |
262 | int(-M _) > 7 && | |
263 | unlink($_) | |
264 | || | |
265 | ($nlink || (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_))) && | |
266 | $dev < 0 && | |
267 | ($File::Find::prune = 1); | |
268 | } | |
269 | ||
270 | Notice the C<_> in the above C<int(-M _)>: the C<_> is a magical | |
271 | filehandle that caches the information from the preceding | |
272 | C<stat()>, C<lstat()>, or filetest. | |
273 | ||
274 | Here's another interesting wanted function. It will find all symbolic | |
275 | links that don't resolve: | |
276 | ||
277 | sub wanted { | |
278 | -l && !-e && print "bogus link: $File::Find::name\n"; | |
279 | } | |
280 | ||
281 | See also the script C<pfind> on CPAN for a nice application of this | |
282 | module. | |
283 | ||
284 | =head1 WARNINGS | |
285 | ||
286 | If you run your program with the C<-w> switch, or if you use the | |
287 | C<warnings> pragma, File::Find will report warnings for several weird | |
288 | situations. You can disable these warnings by putting the statement | |
289 | ||
290 | no warnings 'File::Find'; | |
291 | ||
292 | in the appropriate scope. See L<perllexwarn> for more info about lexical | |
293 | warnings. | |
294 | ||
295 | =head1 CAVEAT | |
296 | ||
297 | =over 2 | |
298 | ||
299 | =item $dont_use_nlink | |
300 | ||
301 | You can set the variable C<$File::Find::dont_use_nlink> to 1, if you want to | |
302 | force File::Find to always stat directories. This was used for file systems | |
303 | that do not have an C<nlink> count matching the number of sub-directories. | |
304 | Examples are ISO-9660 (CD-ROM), AFS, HPFS (OS/2 file system), FAT (DOS file | |
305 | system) and a couple of others. | |
306 | ||
307 | You shouldn't need to set this variable, since File::Find should now detect | |
308 | such file systems on-the-fly and switch itself to using stat. This works even | |
309 | for parts of your file system, like a mounted CD-ROM. | |
310 | ||
311 | If you do set C<$File::Find::dont_use_nlink> to 1, you will notice slow-downs. | |
312 | ||
313 | =item symlinks | |
314 | ||
315 | Be aware that the option to follow symbolic links can be dangerous. | |
316 | Depending on the structure of the directory tree (including symbolic | |
317 | links to directories) you might traverse a given (physical) directory | |
318 | more than once (only if C<follow_fast> is in effect). | |
319 | Furthermore, deleting or changing files in a symbolically linked directory | |
320 | might cause very unpleasant surprises, since you delete or change files | |
321 | in an unknown directory. | |
322 | ||
323 | =back | |
324 | ||
325 | =head1 NOTES | |
326 | ||
327 | =over 4 | |
328 | ||
329 | =item * | |
330 | ||
331 | Mac OS (Classic) users should note a few differences: | |
332 | ||
333 | =over 4 | |
334 | ||
335 | =item * | |
336 | ||
337 | The path separator is ':', not '/', and the current directory is denoted | |
338 | as ':', not '.'. You should be careful about specifying relative pathnames. | |
339 | While a full path always begins with a volume name, a relative pathname | |
340 | should always begin with a ':'. If specifying a volume name only, a | |
341 | trailing ':' is required. | |
342 | ||
343 | =item * | |
344 | ||
345 | C<$File::Find::dir> is guaranteed to end with a ':'. If C<$_> | |
346 | contains the name of a directory, that name may or may not end with a | |
347 | ':'. Likewise, C<$File::Find::name>, which contains the complete | |
348 | pathname to that directory, and C<$File::Find::fullname>, which holds | |
349 | the absolute pathname of that directory with all symbolic links resolved, | |
350 | may or may not end with a ':'. | |
351 | ||
352 | =item * | |
353 | ||
354 | The default C<untaint_pattern> (see above) on Mac OS is set to | |
355 | C<qr|^(.+)$|>. Note that the parentheses are vital. | |
356 | ||
357 | =item * | |
358 | ||
359 | The invisible system file "Icon\015" is ignored. While this file may | |
360 | appear in every directory, there are some more invisible system files | |
361 | on every volume, which are all located at the volume root level (i.e. | |
362 | "MacintoshHD:"). These system files are B<not> excluded automatically. | |
363 | Your filter may use the following code to recognize invisible files or | |
364 | directories (requires Mac::Files): | |
365 | ||
366 | use Mac::Files; | |
367 | ||
368 | # invisible() -- returns 1 if file/directory is invisible, | |
369 | # 0 if it's visible or undef if an error occurred | |
370 | ||
371 | sub invisible($) { | |
372 | my $file = shift; | |
373 | my ($fileCat, $fileInfo); | |
374 | my $invisible_flag = 1 << 14; | |
375 | ||
376 | if ( $fileCat = FSpGetCatInfo($file) ) { | |
377 | if ($fileInfo = $fileCat->ioFlFndrInfo() ) { | |
378 | return (($fileInfo->fdFlags & $invisible_flag) && 1); | |
379 | } | |
380 | } | |
381 | return undef; | |
382 | } | |
383 | ||
384 | Generally, invisible files are system files, unless an odd application | |
385 | decides to use invisible files for its own purposes. To distinguish | |
386 | such files from system files, you have to look at the B<type> and B<creator> | |
387 | file attributes. The MacPerl built-in functions C<GetFileInfo(FILE)> and | |
388 | C<SetFileInfo(CREATOR, TYPE, FILES)> offer access to these attributes | |
389 | (see MacPerl.pm for details). | |
390 | ||
391 | Files that appear on the desktop actually reside in an (hidden) directory | |
392 | named "Desktop Folder" on the particular disk volume. Note that, although | |
393 | all desktop files appear to be on the same "virtual" desktop, each disk | |
394 | volume actually maintains its own "Desktop Folder" directory. | |
395 | ||
396 | =back | |
397 | ||
398 | =back | |
399 | ||
400 | =head1 BUGS AND CAVEATS | |
401 | ||
402 | Despite the name of the C<finddepth()> function, both C<find()> and | |
403 | C<finddepth()> perform a depth-first search of the directory | |
404 | hierarchy. | |
405 | ||
406 | =head1 HISTORY | |
407 | ||
408 | File::Find used to produce incorrect results if called recursively. | |
409 | During the development of perl 5.8 this bug was fixed. | |
410 | The first fixed version of File::Find was 1.01. | |
411 | ||
412 | =cut | |
413 | ||
414 | our @ISA = qw(Exporter); | |
415 | our @EXPORT = qw(find finddepth); | |
416 | ||
417 | ||
418 | use strict; | |
419 | my $Is_VMS; | |
420 | my $Is_MacOS; | |
421 | ||
422 | require File::Basename; | |
423 | require File::Spec; | |
424 | ||
425 | # Should ideally be my() not our() but local() currently | |
426 | # refuses to operate on lexicals | |
427 | ||
428 | our %SLnkSeen; | |
429 | our ($wanted_callback, $avoid_nlink, $bydepth, $no_chdir, $follow, | |
430 | $follow_skip, $full_check, $untaint, $untaint_skip, $untaint_pat, | |
431 | $pre_process, $post_process, $dangling_symlinks); | |
432 | ||
433 | sub contract_name { | |
434 | my ($cdir,$fn) = @_; | |
435 | ||
436 | return substr($cdir,0,rindex($cdir,'/')) if $fn eq $File::Find::current_dir; | |
437 | ||
438 | $cdir = substr($cdir,0,rindex($cdir,'/')+1); | |
439 | ||
440 | $fn =~ s|^\./||; | |
441 | ||
442 | my $abs_name= $cdir . $fn; | |
443 | ||
444 | if (substr($fn,0,3) eq '../') { | |
445 | 1 while $abs_name =~ s!/[^/]*/\.\./!/!; | |
446 | } | |
447 | ||
448 | return $abs_name; | |
449 | } | |
450 | ||
451 | # return the absolute name of a directory or file | |
452 | sub contract_name_Mac { | |
453 | my ($cdir,$fn) = @_; | |
454 | my $abs_name; | |
455 | ||
456 | if ($fn =~ /^(:+)(.*)$/) { # valid pathname starting with a ':' | |
457 | ||
458 | my $colon_count = length ($1); | |
459 | if ($colon_count == 1) { | |
460 | $abs_name = $cdir . $2; | |
461 | return $abs_name; | |
462 | } | |
463 | else { | |
464 | # need to move up the tree, but | |
465 | # only if it's not a volume name | |
466 | for (my $i=1; $i<$colon_count; $i++) { | |
467 | unless ($cdir =~ /^[^:]+:$/) { # volume name | |
468 | $cdir =~ s/[^:]+:$//; | |
469 | } | |
470 | else { | |
471 | return undef; | |
472 | } | |
473 | } | |
474 | $abs_name = $cdir . $2; | |
475 | return $abs_name; | |
476 | } | |
477 | ||
478 | } | |
479 | else { | |
480 | ||
481 | # $fn may be a valid path to a directory or file or (dangling) | |
482 | # symlink, without a leading ':' | |
483 | if ( (-e $fn) || (-l $fn) ) { | |
484 | if ($fn =~ /^[^:]+:/) { # a volume name like DataHD:* | |
485 | return $fn; # $fn is already an absolute path | |
486 | } | |
487 | else { | |
488 | $abs_name = $cdir . $fn; | |
489 | return $abs_name; | |
490 | } | |
491 | } | |
492 | else { # argh!, $fn is not a valid directory/file | |
493 | return undef; | |
494 | } | |
495 | } | |
496 | } | |
497 | ||
498 | sub PathCombine($$) { | |
499 | my ($Base,$Name) = @_; | |
500 | my $AbsName; | |
501 | ||
502 | if ($Is_MacOS) { | |
503 | # $Name is the resolved symlink (always a full path on MacOS), | |
504 | # i.e. there's no need to call contract_name_Mac() | |
505 | $AbsName = $Name; | |
506 | ||
507 | # (simple) check for recursion | |
508 | if ( ( $Base =~ /^$AbsName/) && (-d $AbsName) ) { # recursion | |
509 | return undef; | |
510 | } | |
511 | } | |
512 | else { | |
513 | if (substr($Name,0,1) eq '/') { | |
514 | $AbsName= $Name; | |
515 | } | |
516 | else { | |
517 | $AbsName= contract_name($Base,$Name); | |
518 | } | |
519 | ||
520 | # (simple) check for recursion | |
521 | my $newlen= length($AbsName); | |
522 | if ($newlen <= length($Base)) { | |
523 | if (($newlen == length($Base) || substr($Base,$newlen,1) eq '/') | |
524 | && $AbsName eq substr($Base,0,$newlen)) | |
525 | { | |
526 | return undef; | |
527 | } | |
528 | } | |
529 | } | |
530 | return $AbsName; | |
531 | } | |
532 | ||
533 | sub Follow_SymLink($) { | |
534 | my ($AbsName) = @_; | |
535 | ||
536 | my ($NewName,$DEV, $INO); | |
537 | ($DEV, $INO)= lstat $AbsName; | |
538 | ||
539 | while (-l _) { | |
540 | if ($SLnkSeen{$DEV, $INO}++) { | |
541 | if ($follow_skip < 2) { | |
542 | die "$AbsName is encountered a second time"; | |
543 | } | |
544 | else { | |
545 | return undef; | |
546 | } | |
547 | } | |
548 | $NewName= PathCombine($AbsName, readlink($AbsName)); | |
549 | unless(defined $NewName) { | |
550 | if ($follow_skip < 2) { | |
551 | die "$AbsName is a recursive symbolic link"; | |
552 | } | |
553 | else { | |
554 | return undef; | |
555 | } | |
556 | } | |
557 | else { | |
558 | $AbsName= $NewName; | |
559 | } | |
560 | ($DEV, $INO) = lstat($AbsName); | |
561 | return undef unless defined $DEV; # dangling symbolic link | |
562 | } | |
563 | ||
564 | if ($full_check && defined $DEV && $SLnkSeen{$DEV, $INO}++) { | |
565 | if ( ($follow_skip < 1) || ((-d _) && ($follow_skip < 2)) ) { | |
566 | die "$AbsName encountered a second time"; | |
567 | } | |
568 | else { | |
569 | return undef; | |
570 | } | |
571 | } | |
572 | ||
573 | return $AbsName; | |
574 | } | |
575 | ||
576 | our($dir, $name, $fullname, $prune); | |
577 | sub _find_dir_symlnk($$$); | |
578 | sub _find_dir($$$); | |
579 | ||
580 | # check whether or not a scalar variable is tainted | |
581 | # (code straight from the Camel, 3rd ed., page 561) | |
582 | sub is_tainted_pp { | |
583 | my $arg = shift; | |
584 | my $nada = substr($arg, 0, 0); # zero-length | |
585 | local $@; | |
586 | eval { eval "# $nada" }; | |
587 | return length($@) != 0; | |
588 | } | |
589 | ||
590 | sub _find_opt { | |
591 | my $wanted = shift; | |
592 | die "invalid top directory" unless defined $_[0]; | |
593 | ||
594 | # This function must local()ize everything because callbacks may | |
595 | # call find() or finddepth() | |
596 | ||
597 | local %SLnkSeen; | |
598 | local ($wanted_callback, $avoid_nlink, $bydepth, $no_chdir, $follow, | |
599 | $follow_skip, $full_check, $untaint, $untaint_skip, $untaint_pat, | |
600 | $pre_process, $post_process, $dangling_symlinks); | |
601 | local($dir, $name, $fullname, $prune); | |
602 | local *_ = \my $a; | |
603 | ||
604 | my $cwd = $wanted->{bydepth} ? Cwd::fastcwd() : Cwd::getcwd(); | |
605 | my $cwd_untainted = $cwd; | |
606 | my $check_t_cwd = 1; | |
607 | $wanted_callback = $wanted->{wanted}; | |
608 | $bydepth = $wanted->{bydepth}; | |
609 | $pre_process = $wanted->{preprocess}; | |
610 | $post_process = $wanted->{postprocess}; | |
611 | $no_chdir = $wanted->{no_chdir}; | |
612 | $full_check = $^O eq 'MSWin32' ? 0 : $wanted->{follow}; | |
613 | $follow = $^O eq 'MSWin32' ? 0 : | |
614 | $full_check || $wanted->{follow_fast}; | |
615 | $follow_skip = $wanted->{follow_skip}; | |
616 | $untaint = $wanted->{untaint}; | |
617 | $untaint_pat = $wanted->{untaint_pattern}; | |
618 | $untaint_skip = $wanted->{untaint_skip}; | |
619 | $dangling_symlinks = $wanted->{dangling_symlinks}; | |
620 | ||
621 | # for compatibility reasons (find.pl, find2perl) | |
622 | local our ($topdir, $topdev, $topino, $topmode, $topnlink); | |
623 | ||
624 | # a symbolic link to a directory doesn't increase the link count | |
625 | $avoid_nlink = $follow || $File::Find::dont_use_nlink; | |
626 | ||
627 | my ($abs_dir, $Is_Dir); | |
628 | ||
629 | Proc_Top_Item: | |
630 | foreach my $TOP (@_) { | |
631 | my $top_item = $TOP; | |
632 | ||
633 | ($topdev,$topino,$topmode,$topnlink) = $follow ? stat $top_item : lstat $top_item; | |
634 | ||
635 | if ($Is_MacOS) { | |
636 | $top_item = ":$top_item" | |
637 | if ( (-d _) && ( $top_item !~ /:/ ) ); | |
638 | } elsif ($^O eq 'MSWin32') { | |
639 | $top_item =~ s|/\z|| unless $top_item =~ m|\w:/$|; | |
640 | } | |
641 | else { | |
642 | $top_item =~ s|/\z|| unless $top_item eq '/'; | |
643 | } | |
644 | ||
645 | $Is_Dir= 0; | |
646 | ||
647 | if ($follow) { | |
648 | ||
649 | if ($Is_MacOS) { | |
650 | $cwd = "$cwd:" unless ($cwd =~ /:$/); # for safety | |
651 | ||
652 | if ($top_item eq $File::Find::current_dir) { | |
653 | $abs_dir = $cwd; | |
654 | } | |
655 | else { | |
656 | $abs_dir = contract_name_Mac($cwd, $top_item); | |
657 | unless (defined $abs_dir) { | |
658 | warnings::warnif "Can't determine absolute path for $top_item (No such file or directory)\n"; | |
659 | next Proc_Top_Item; | |
660 | } | |
661 | } | |
662 | ||
663 | } | |
664 | else { | |
665 | if (substr($top_item,0,1) eq '/') { | |
666 | $abs_dir = $top_item; | |
667 | } | |
668 | elsif ($top_item eq $File::Find::current_dir) { | |
669 | $abs_dir = $cwd; | |
670 | } | |
671 | else { # care about any ../ | |
672 | $abs_dir = contract_name("$cwd/",$top_item); | |
673 | } | |
674 | } | |
675 | $abs_dir= Follow_SymLink($abs_dir); | |
676 | unless (defined $abs_dir) { | |
677 | if ($dangling_symlinks) { | |
678 | if (ref $dangling_symlinks eq 'CODE') { | |
679 | $dangling_symlinks->($top_item, $cwd); | |
680 | } else { | |
681 | warnings::warnif "$top_item is a dangling symbolic link\n"; | |
682 | } | |
683 | } | |
684 | next Proc_Top_Item; | |
685 | } | |
686 | ||
687 | if (-d _) { | |
688 | _find_dir_symlnk($wanted, $abs_dir, $top_item); | |
689 | $Is_Dir= 1; | |
690 | } | |
691 | } | |
692 | else { # no follow | |
693 | $topdir = $top_item; | |
694 | unless (defined $topnlink) { | |
695 | warnings::warnif "Can't stat $top_item: $!\n"; | |
696 | next Proc_Top_Item; | |
697 | } | |
698 | if (-d _) { | |
699 | $top_item =~ s/\.dir\z//i if $Is_VMS; | |
700 | _find_dir($wanted, $top_item, $topnlink); | |
701 | $Is_Dir= 1; | |
702 | } | |
703 | else { | |
704 | $abs_dir= $top_item; | |
705 | } | |
706 | } | |
707 | ||
708 | unless ($Is_Dir) { | |
709 | unless (($_,$dir) = File::Basename::fileparse($abs_dir)) { | |
710 | if ($Is_MacOS) { | |
711 | ($dir,$_) = (':', $top_item); # $File::Find::dir, $_ | |
712 | } | |
713 | else { | |
714 | ($dir,$_) = ('./', $top_item); | |
715 | } | |
716 | } | |
717 | ||
718 | $abs_dir = $dir; | |
719 | if (( $untaint ) && (is_tainted($dir) )) { | |
720 | ( $abs_dir ) = $dir =~ m|$untaint_pat|; | |
721 | unless (defined $abs_dir) { | |
722 | if ($untaint_skip == 0) { | |
723 | die "directory $dir is still tainted"; | |
724 | } | |
725 | else { | |
726 | next Proc_Top_Item; | |
727 | } | |
728 | } | |
729 | } | |
730 | ||
731 | unless ($no_chdir || chdir $abs_dir) { | |
732 | warnings::warnif "Couldn't chdir $abs_dir: $!\n"; | |
733 | next Proc_Top_Item; | |
734 | } | |
735 | ||
736 | $name = $abs_dir . $_; # $File::Find::name | |
737 | $_ = $name if $no_chdir; | |
738 | ||
739 | { $wanted_callback->() }; # protect against wild "next" | |
740 | ||
741 | } | |
742 | ||
743 | unless ( $no_chdir ) { | |
744 | if ( ($check_t_cwd) && (($untaint) && (is_tainted($cwd) )) ) { | |
745 | ( $cwd_untainted ) = $cwd =~ m|$untaint_pat|; | |
746 | unless (defined $cwd_untainted) { | |
747 | die "insecure cwd in find(depth)"; | |
748 | } | |
749 | $check_t_cwd = 0; | |
750 | } | |
751 | unless (chdir $cwd_untainted) { | |
752 | die "Can't cd to $cwd: $!\n"; | |
753 | } | |
754 | } | |
755 | } | |
756 | } | |
757 | ||
758 | # API: | |
759 | # $wanted | |
760 | # $p_dir : "parent directory" | |
761 | # $nlink : what came back from the stat | |
762 | # preconditions: | |
763 | # chdir (if not no_chdir) to dir | |
764 | ||
765 | sub _find_dir($$$) { | |
766 | my ($wanted, $p_dir, $nlink) = @_; | |
767 | my ($CdLvl,$Level) = (0,0); | |
768 | my @Stack; | |
769 | my @filenames; | |
770 | my ($subcount,$sub_nlink); | |
771 | my $SE= []; | |
772 | my $dir_name= $p_dir; | |
773 | my $dir_pref; | |
774 | my $dir_rel = $File::Find::current_dir; | |
775 | my $tainted = 0; | |
776 | my $no_nlink; | |
777 | ||
778 | if ($Is_MacOS) { | |
779 | $dir_pref= ($p_dir =~ /:$/) ? $p_dir : "$p_dir:"; # preface | |
780 | } elsif ($^O eq 'MSWin32') { | |
781 | $dir_pref = ($p_dir =~ m|\w:/$| ? $p_dir : "$p_dir/" ); | |
782 | } | |
783 | else { | |
784 | $dir_pref= ( $p_dir eq '/' ? '/' : "$p_dir/" ); | |
785 | } | |
786 | ||
787 | local ($dir, $name, $prune, *DIR); | |
788 | ||
789 | unless ( $no_chdir || ($p_dir eq $File::Find::current_dir)) { | |
790 | my $udir = $p_dir; | |
791 | if (( $untaint ) && (is_tainted($p_dir) )) { | |
792 | ( $udir ) = $p_dir =~ m|$untaint_pat|; | |
793 | unless (defined $udir) { | |
794 | if ($untaint_skip == 0) { | |
795 | die "directory $p_dir is still tainted"; | |
796 | } | |
797 | else { | |
798 | return; | |
799 | } | |
800 | } | |
801 | } | |
802 | unless (chdir ($Is_VMS && $udir !~ /[\/\[<]+/ ? "./$udir" : $udir)) { | |
803 | warnings::warnif "Can't cd to $udir: $!\n"; | |
804 | return; | |
805 | } | |
806 | } | |
807 | ||
808 | # push the starting directory | |
809 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; | |
810 | ||
811 | if ($Is_MacOS) { | |
812 | $p_dir = $dir_pref; # ensure trailing ':' | |
813 | } | |
814 | ||
815 | while (defined $SE) { | |
816 | unless ($bydepth) { | |
817 | $dir= $p_dir; # $File::Find::dir | |
818 | $name= $dir_name; # $File::Find::name | |
819 | $_= ($no_chdir ? $dir_name : $dir_rel ); # $_ | |
820 | # prune may happen here | |
821 | $prune= 0; | |
822 | { $wanted_callback->() }; # protect against wild "next" | |
823 | next if $prune; | |
824 | } | |
825 | ||
826 | # change to that directory | |
827 | unless ($no_chdir || ($dir_rel eq $File::Find::current_dir)) { | |
828 | my $udir= $dir_rel; | |
829 | if ( ($untaint) && (($tainted) || ($tainted = is_tainted($dir_rel) )) ) { | |
830 | ( $udir ) = $dir_rel =~ m|$untaint_pat|; | |
831 | unless (defined $udir) { | |
832 | if ($untaint_skip == 0) { | |
833 | if ($Is_MacOS) { | |
834 | die "directory ($p_dir) $dir_rel is still tainted"; | |
835 | } | |
836 | else { | |
837 | die "directory (" . ($p_dir ne '/' ? $p_dir : '') . "/) $dir_rel is still tainted"; | |
838 | } | |
839 | } else { # $untaint_skip == 1 | |
840 | next; | |
841 | } | |
842 | } | |
843 | } | |
844 | unless (chdir ($Is_VMS && $udir !~ /[\/\[<]+/ ? "./$udir" : $udir)) { | |
845 | if ($Is_MacOS) { | |
846 | warnings::warnif "Can't cd to ($p_dir) $udir: $!\n"; | |
847 | } | |
848 | else { | |
849 | warnings::warnif "Can't cd to (" . | |
850 | ($p_dir ne '/' ? $p_dir : '') . "/) $udir: $!\n"; | |
851 | } | |
852 | next; | |
853 | } | |
854 | $CdLvl++; | |
855 | } | |
856 | ||
857 | if ($Is_MacOS) { | |
858 | $dir_name = "$dir_name:" unless ($dir_name =~ /:$/); | |
859 | } | |
860 | ||
861 | $dir= $dir_name; # $File::Find::dir | |
862 | ||
863 | # Get the list of files in the current directory. | |
864 | unless (opendir DIR, ($no_chdir ? $dir_name : $File::Find::current_dir)) { | |
865 | warnings::warnif "Can't opendir($dir_name): $!\n"; | |
866 | next; | |
867 | } | |
868 | @filenames = readdir DIR; | |
869 | closedir(DIR); | |
870 | @filenames = $pre_process->(@filenames) if $pre_process; | |
871 | push @Stack,[$CdLvl,$dir_name,"",-2] if $post_process; | |
872 | ||
873 | # default: use whatever was specifid | |
874 | # (if $nlink >= 2, and $avoid_nlink == 0, this will switch back) | |
875 | $no_nlink = $avoid_nlink; | |
876 | # if dir has wrong nlink count, force switch to slower stat method | |
877 | $no_nlink = 1 if ($nlink < 2); | |
878 | ||
879 | if ($nlink == 2 && !$no_nlink) { | |
880 | # This dir has no subdirectories. | |
881 | for my $FN (@filenames) { | |
882 | next if $FN =~ $File::Find::skip_pattern; | |
883 | ||
884 | $name = $dir_pref . $FN; # $File::Find::name | |
885 | $_ = ($no_chdir ? $name : $FN); # $_ | |
886 | { $wanted_callback->() }; # protect against wild "next" | |
887 | } | |
888 | ||
889 | } | |
890 | else { | |
891 | # This dir has subdirectories. | |
892 | $subcount = $nlink - 2; | |
893 | ||
894 | # HACK: insert directories at this position. so as to preserve | |
895 | # the user pre-processed ordering of files. | |
896 | # EG: directory traversal is in user sorted order, not at random. | |
897 | my $stack_top = @Stack; | |
898 | ||
899 | for my $FN (@filenames) { | |
900 | next if $FN =~ $File::Find::skip_pattern; | |
901 | if ($subcount > 0 || $no_nlink) { | |
902 | # Seen all the subdirs? | |
903 | # check for directoriness. | |
904 | # stat is faster for a file in the current directory | |
905 | $sub_nlink = (lstat ($no_chdir ? $dir_pref . $FN : $FN))[3]; | |
906 | ||
907 | if (-d _) { | |
908 | --$subcount; | |
909 | $FN =~ s/\.dir\z//i if $Is_VMS; | |
910 | # HACK: replace push to preserve dir traversal order | |
911 | #push @Stack,[$CdLvl,$dir_name,$FN,$sub_nlink]; | |
912 | splice @Stack, $stack_top, 0, | |
913 | [$CdLvl,$dir_name,$FN,$sub_nlink]; | |
914 | } | |
915 | else { | |
916 | $name = $dir_pref . $FN; # $File::Find::name | |
917 | $_= ($no_chdir ? $name : $FN); # $_ | |
918 | { $wanted_callback->() }; # protect against wild "next" | |
919 | } | |
920 | } | |
921 | else { | |
922 | $name = $dir_pref . $FN; # $File::Find::name | |
923 | $_= ($no_chdir ? $name : $FN); # $_ | |
924 | { $wanted_callback->() }; # protect against wild "next" | |
925 | } | |
926 | } | |
927 | } | |
928 | } | |
929 | continue { | |
930 | while ( defined ($SE = pop @Stack) ) { | |
931 | ($Level, $p_dir, $dir_rel, $nlink) = @$SE; | |
932 | if ($CdLvl > $Level && !$no_chdir) { | |
933 | my $tmp; | |
934 | if ($Is_MacOS) { | |
935 | $tmp = (':' x ($CdLvl-$Level)) . ':'; | |
936 | } | |
937 | else { | |
938 | $tmp = join('/',('..') x ($CdLvl-$Level)); | |
939 | } | |
940 | die "Can't cd to $dir_name" . $tmp | |
941 | unless chdir ($tmp); | |
942 | $CdLvl = $Level; | |
943 | } | |
944 | ||
945 | if ($Is_MacOS) { | |
946 | # $pdir always has a trailing ':', except for the starting dir, | |
947 | # where $dir_rel eq ':' | |
948 | $dir_name = "$p_dir$dir_rel"; | |
949 | $dir_pref = "$dir_name:"; | |
950 | } | |
951 | elsif ($^O eq 'MSWin32') { | |
952 | $dir_name = ($p_dir =~ m|\w:/$| ? "$p_dir$dir_rel" : "$p_dir/$dir_rel"); | |
953 | $dir_pref = "$dir_name/"; | |
954 | } | |
955 | else { | |
956 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); | |
957 | $dir_pref = "$dir_name/"; | |
958 | } | |
959 | ||
960 | if ( $nlink == -2 ) { | |
961 | $name = $dir = $p_dir; # $File::Find::name / dir | |
962 | $_ = $File::Find::current_dir; | |
963 | $post_process->(); # End-of-directory processing | |
964 | } | |
965 | elsif ( $nlink < 0 ) { # must be finddepth, report dirname now | |
966 | $name = $dir_name; | |
967 | if ($Is_MacOS) { | |
968 | if ($dir_rel eq ':') { # must be the top dir, where we started | |
969 | $name =~ s|:$||; # $File::Find::name | |
970 | $p_dir = "$p_dir:" unless ($p_dir =~ /:$/); | |
971 | } | |
972 | $dir = $p_dir; # $File::Find::dir | |
973 | $_ = ($no_chdir ? $name : $dir_rel); # $_ | |
974 | } | |
975 | else { | |
976 | if ( substr($name,-2) eq '/.' ) { | |
977 | substr($name, length($name) == 2 ? -1 : -2) = ''; | |
978 | } | |
979 | $dir = $p_dir; | |
980 | $_ = ($no_chdir ? $dir_name : $dir_rel ); | |
981 | if ( substr($_,-2) eq '/.' ) { | |
982 | substr($_, length($_) == 2 ? -1 : -2) = ''; | |
983 | } | |
984 | } | |
985 | { $wanted_callback->() }; # protect against wild "next" | |
986 | } | |
987 | else { | |
988 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; | |
989 | last; | |
990 | } | |
991 | } | |
992 | } | |
993 | } | |
994 | ||
995 | ||
996 | # API: | |
997 | # $wanted | |
998 | # $dir_loc : absolute location of a dir | |
999 | # $p_dir : "parent directory" | |
1000 | # preconditions: | |
1001 | # chdir (if not no_chdir) to dir | |
1002 | ||
1003 | sub _find_dir_symlnk($$$) { | |
1004 | my ($wanted, $dir_loc, $p_dir) = @_; # $dir_loc is the absolute directory | |
1005 | my @Stack; | |
1006 | my @filenames; | |
1007 | my $new_loc; | |
1008 | my $updir_loc = $dir_loc; # untainted parent directory | |
1009 | my $SE = []; | |
1010 | my $dir_name = $p_dir; | |
1011 | my $dir_pref; | |
1012 | my $loc_pref; | |
1013 | my $dir_rel = $File::Find::current_dir; | |
1014 | my $byd_flag; # flag for pending stack entry if $bydepth | |
1015 | my $tainted = 0; | |
1016 | my $ok = 1; | |
1017 | ||
1018 | if ($Is_MacOS) { | |
1019 | $dir_pref = ($p_dir =~ /:$/) ? "$p_dir" : "$p_dir:"; | |
1020 | $loc_pref = ($dir_loc =~ /:$/) ? "$dir_loc" : "$dir_loc:"; | |
1021 | } else { | |
1022 | $dir_pref = ( $p_dir eq '/' ? '/' : "$p_dir/" ); | |
1023 | $loc_pref = ( $dir_loc eq '/' ? '/' : "$dir_loc/" ); | |
1024 | } | |
1025 | ||
1026 | local ($dir, $name, $fullname, $prune, *DIR); | |
1027 | ||
1028 | unless ($no_chdir) { | |
1029 | # untaint the topdir | |
1030 | if (( $untaint ) && (is_tainted($dir_loc) )) { | |
1031 | ( $updir_loc ) = $dir_loc =~ m|$untaint_pat|; # parent dir, now untainted | |
1032 | # once untainted, $updir_loc is pushed on the stack (as parent directory); | |
1033 | # hence, we don't need to untaint the parent directory every time we chdir | |
1034 | # to it later | |
1035 | unless (defined $updir_loc) { | |
1036 | if ($untaint_skip == 0) { | |
1037 | die "directory $dir_loc is still tainted"; | |
1038 | } | |
1039 | else { | |
1040 | return; | |
1041 | } | |
1042 | } | |
1043 | } | |
1044 | $ok = chdir($updir_loc) unless ($p_dir eq $File::Find::current_dir); | |
1045 | unless ($ok) { | |
1046 | warnings::warnif "Can't cd to $updir_loc: $!\n"; | |
1047 | return; | |
1048 | } | |
1049 | } | |
1050 | ||
1051 | push @Stack,[$dir_loc,$updir_loc,$p_dir,$dir_rel,-1] if $bydepth; | |
1052 | ||
1053 | if ($Is_MacOS) { | |
1054 | $p_dir = $dir_pref; # ensure trailing ':' | |
1055 | } | |
1056 | ||
1057 | while (defined $SE) { | |
1058 | ||
1059 | unless ($bydepth) { | |
1060 | # change (back) to parent directory (always untainted) | |
1061 | unless ($no_chdir) { | |
1062 | unless (chdir $updir_loc) { | |
1063 | warnings::warnif "Can't cd to $updir_loc: $!\n"; | |
1064 | next; | |
1065 | } | |
1066 | } | |
1067 | $dir= $p_dir; # $File::Find::dir | |
1068 | $name= $dir_name; # $File::Find::name | |
1069 | $_= ($no_chdir ? $dir_name : $dir_rel ); # $_ | |
1070 | $fullname= $dir_loc; # $File::Find::fullname | |
1071 | # prune may happen here | |
1072 | $prune= 0; | |
1073 | lstat($_); # make sure file tests with '_' work | |
1074 | { $wanted_callback->() }; # protect against wild "next" | |
1075 | next if $prune; | |
1076 | } | |
1077 | ||
1078 | # change to that directory | |
1079 | unless ($no_chdir || ($dir_rel eq $File::Find::current_dir)) { | |
1080 | $updir_loc = $dir_loc; | |
1081 | if ( ($untaint) && (($tainted) || ($tainted = is_tainted($dir_loc) )) ) { | |
1082 | # untaint $dir_loc, what will be pushed on the stack as (untainted) parent dir | |
1083 | ( $updir_loc ) = $dir_loc =~ m|$untaint_pat|; | |
1084 | unless (defined $updir_loc) { | |
1085 | if ($untaint_skip == 0) { | |
1086 | die "directory $dir_loc is still tainted"; | |
1087 | } | |
1088 | else { | |
1089 | next; | |
1090 | } | |
1091 | } | |
1092 | } | |
1093 | unless (chdir $updir_loc) { | |
1094 | warnings::warnif "Can't cd to $updir_loc: $!\n"; | |
1095 | next; | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | if ($Is_MacOS) { | |
1100 | $dir_name = "$dir_name:" unless ($dir_name =~ /:$/); | |
1101 | } | |
1102 | ||
1103 | $dir = $dir_name; # $File::Find::dir | |
1104 | ||
1105 | # Get the list of files in the current directory. | |
1106 | unless (opendir DIR, ($no_chdir ? $dir_loc : $File::Find::current_dir)) { | |
1107 | warnings::warnif "Can't opendir($dir_loc): $!\n"; | |
1108 | next; | |
1109 | } | |
1110 | @filenames = readdir DIR; | |
1111 | closedir(DIR); | |
1112 | ||
1113 | for my $FN (@filenames) { | |
1114 | next if $FN =~ $File::Find::skip_pattern; | |
1115 | ||
1116 | # follow symbolic links / do an lstat | |
1117 | $new_loc = Follow_SymLink($loc_pref.$FN); | |
1118 | ||
1119 | # ignore if invalid symlink | |
1120 | unless (defined $new_loc) { | |
1121 | if ($dangling_symlinks) { | |
1122 | if (ref $dangling_symlinks eq 'CODE') { | |
1123 | $dangling_symlinks->($FN, $dir_pref); | |
1124 | } else { | |
1125 | warnings::warnif "$dir_pref$FN is a dangling symbolic link\n"; | |
1126 | } | |
1127 | } | |
1128 | ||
1129 | $fullname = undef; | |
1130 | $name = $dir_pref . $FN; | |
1131 | $_ = ($no_chdir ? $name : $FN); | |
1132 | { $wanted_callback->() }; | |
1133 | next; | |
1134 | } | |
1135 | ||
1136 | if (-d _) { | |
1137 | push @Stack,[$new_loc,$updir_loc,$dir_name,$FN,1]; | |
1138 | } | |
1139 | else { | |
1140 | $fullname = $new_loc; # $File::Find::fullname | |
1141 | $name = $dir_pref . $FN; # $File::Find::name | |
1142 | $_ = ($no_chdir ? $name : $FN); # $_ | |
1143 | { $wanted_callback->() }; # protect against wild "next" | |
1144 | } | |
1145 | } | |
1146 | ||
1147 | } | |
1148 | continue { | |
1149 | while (defined($SE = pop @Stack)) { | |
1150 | ($dir_loc, $updir_loc, $p_dir, $dir_rel, $byd_flag) = @$SE; | |
1151 | if ($Is_MacOS) { | |
1152 | # $p_dir always has a trailing ':', except for the starting dir, | |
1153 | # where $dir_rel eq ':' | |
1154 | $dir_name = "$p_dir$dir_rel"; | |
1155 | $dir_pref = "$dir_name:"; | |
1156 | $loc_pref = ($dir_loc =~ /:$/) ? $dir_loc : "$dir_loc:"; | |
1157 | } | |
1158 | else { | |
1159 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); | |
1160 | $dir_pref = "$dir_name/"; | |
1161 | $loc_pref = "$dir_loc/"; | |
1162 | } | |
1163 | if ( $byd_flag < 0 ) { # must be finddepth, report dirname now | |
1164 | unless ($no_chdir || ($dir_rel eq $File::Find::current_dir)) { | |
1165 | unless (chdir $updir_loc) { # $updir_loc (parent dir) is always untainted | |
1166 | warnings::warnif "Can't cd to $updir_loc: $!\n"; | |
1167 | next; | |
1168 | } | |
1169 | } | |
1170 | $fullname = $dir_loc; # $File::Find::fullname | |
1171 | $name = $dir_name; # $File::Find::name | |
1172 | if ($Is_MacOS) { | |
1173 | if ($dir_rel eq ':') { # must be the top dir, where we started | |
1174 | $name =~ s|:$||; # $File::Find::name | |
1175 | $p_dir = "$p_dir:" unless ($p_dir =~ /:$/); | |
1176 | } | |
1177 | $dir = $p_dir; # $File::Find::dir | |
1178 | $_ = ($no_chdir ? $name : $dir_rel); # $_ | |
1179 | } | |
1180 | else { | |
1181 | if ( substr($name,-2) eq '/.' ) { | |
1182 | substr($name, length($name) == 2 ? -1 : -2) = ''; # $File::Find::name | |
1183 | } | |
1184 | $dir = $p_dir; # $File::Find::dir | |
1185 | $_ = ($no_chdir ? $dir_name : $dir_rel); # $_ | |
1186 | if ( substr($_,-2) eq '/.' ) { | |
1187 | substr($_, length($_) == 2 ? -1 : -2) = ''; | |
1188 | } | |
1189 | } | |
1190 | ||
1191 | lstat($_); # make sure file tests with '_' work | |
1192 | { $wanted_callback->() }; # protect against wild "next" | |
1193 | } | |
1194 | else { | |
1195 | push @Stack,[$dir_loc, $updir_loc, $p_dir, $dir_rel,-1] if $bydepth; | |
1196 | last; | |
1197 | } | |
1198 | } | |
1199 | } | |
1200 | } | |
1201 | ||
1202 | ||
1203 | sub wrap_wanted { | |
1204 | my $wanted = shift; | |
1205 | if ( ref($wanted) eq 'HASH' ) { | |
1206 | if ( $wanted->{follow} || $wanted->{follow_fast}) { | |
1207 | $wanted->{follow_skip} = 1 unless defined $wanted->{follow_skip}; | |
1208 | } | |
1209 | if ( $wanted->{untaint} ) { | |
1210 | $wanted->{untaint_pattern} = $File::Find::untaint_pattern | |
1211 | unless defined $wanted->{untaint_pattern}; | |
1212 | $wanted->{untaint_skip} = 0 unless defined $wanted->{untaint_skip}; | |
1213 | } | |
1214 | return $wanted; | |
1215 | } | |
1216 | else { | |
1217 | return { wanted => $wanted }; | |
1218 | } | |
1219 | } | |
1220 | ||
1221 | sub find { | |
1222 | my $wanted = shift; | |
1223 | _find_opt(wrap_wanted($wanted), @_); | |
1224 | } | |
1225 | ||
1226 | sub finddepth { | |
1227 | my $wanted = wrap_wanted(shift); | |
1228 | $wanted->{bydepth} = 1; | |
1229 | _find_opt($wanted, @_); | |
1230 | } | |
1231 | ||
1232 | # default | |
1233 | $File::Find::skip_pattern = qr/^\.{1,2}\z/; | |
1234 | $File::Find::untaint_pattern = qr|^([-+@\w./]+)$|; | |
1235 | ||
1236 | # These are hard-coded for now, but may move to hint files. | |
1237 | if ($^O eq 'VMS') { | |
1238 | $Is_VMS = 1; | |
1239 | $File::Find::dont_use_nlink = 1; | |
1240 | } | |
1241 | elsif ($^O eq 'MacOS') { | |
1242 | $Is_MacOS = 1; | |
1243 | $File::Find::dont_use_nlink = 1; | |
1244 | $File::Find::skip_pattern = qr/^Icon\015\z/; | |
1245 | $File::Find::untaint_pattern = qr|^(.+)$|; | |
1246 | } | |
1247 | ||
1248 | # this _should_ work properly on all platforms | |
1249 | # where File::Find can be expected to work | |
1250 | $File::Find::current_dir = File::Spec->curdir || '.'; | |
1251 | ||
1252 | $File::Find::dont_use_nlink = 1 | |
1253 | if $^O eq 'os2' || $^O eq 'dos' || $^O eq 'amigaos' || $^O eq 'MSWin32' || | |
1254 | $^O eq 'interix' || $^O eq 'cygwin' || $^O eq 'epoc' || $^O eq 'qnx' || | |
1255 | $^O eq 'nto'; | |
1256 | ||
1257 | # Set dont_use_nlink in your hint file if your system's stat doesn't | |
1258 | # report the number of links in a directory as an indication | |
1259 | # of the number of files. | |
1260 | # See, e.g. hints/machten.sh for MachTen 2.2. | |
1261 | unless ($File::Find::dont_use_nlink) { | |
1262 | require Config; | |
1263 | $File::Find::dont_use_nlink = 1 if ($Config::Config{'dont_use_nlink'}); | |
1264 | } | |
1265 | ||
1266 | # We need a function that checks if a scalar is tainted. Either use the | |
1267 | # Scalar::Util module's tainted() function or our (slower) pure Perl | |
1268 | # fallback is_tainted_pp() | |
1269 | { | |
1270 | local $@; | |
1271 | eval { require Scalar::Util }; | |
1272 | *is_tainted = $@ ? \&is_tainted_pp : \&Scalar::Util::tainted; | |
1273 | } | |
1274 | ||
1275 | 1; |