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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 = '1.04'; | |
7 | require Exporter; | |
8 | require Cwd; | |
9 | ||
10 | =head1 NAME | |
11 | ||
12 | File::Find - Traverse a directory tree. | |
13 | ||
14 | =head1 SYNOPSIS | |
15 | ||
16 | use File::Find; | |
17 | find(\&wanted, @directories_to_seach); | |
18 | sub wanted { ... } | |
19 | ||
20 | use File::Find; | |
21 | finddepth(\&wanted, @directories_to_search); | |
22 | sub wanted { ... } | |
23 | ||
24 | use File::Find; | |
25 | find({ wanted => \&process, follow => 1 }, '.'); | |
26 | ||
27 | =head1 DESCRIPTION | |
28 | ||
29 | These are functions for searching through directory trees doing work | |
30 | on each file found similar to the Unix I<find> command. File::Find | |
31 | exports two functions, C<find> and C<finddepth>. They work similarly | |
32 | but have subtle differences. | |
33 | ||
34 | =over 4 | |
35 | ||
36 | =item B<find> | |
37 | ||
38 | find(\&wanted, @directories); | |
39 | find(\%options, @directories); | |
40 | ||
41 | find() does a breadth-first search over the given @directories in the | |
42 | order they are given. In essense, it works from the top down. | |
43 | ||
44 | For each file or directory found the &wanted subroutine is called (see | |
45 | below for details). Additionally, for each directory found it will go | |
46 | into that directory and continue the search. | |
47 | ||
48 | =item B<finddepth> | |
49 | ||
50 | finddepth(\&wanted, @directories); | |
51 | finddepth(\%options, @directories); | |
52 | ||
53 | finddepth() works just like find() except it does a depth-first search. | |
54 | It works from the bottom of the directory tree up. | |
55 | ||
56 | =back | |
57 | ||
58 | =head2 %options | |
59 | ||
60 | The first argument to find() is either a hash reference describing the | |
61 | operations to be performed for each file, or a code reference. The | |
62 | code reference is described in L<The wanted function> below. | |
63 | ||
64 | Here are the possible keys for the hash: | |
65 | ||
66 | =over 3 | |
67 | ||
68 | =item C<wanted> | |
69 | ||
70 | The value should be a code reference. This code reference is | |
71 | described in L<The wanted function> below. | |
72 | ||
73 | =item C<bydepth> | |
74 | ||
75 | Reports the name of a directory only AFTER all its entries | |
76 | have been reported. Entry point finddepth() is a shortcut for | |
77 | specifying C<{ bydepth =E<gt> 1 }> in the first argument of find(). | |
78 | ||
79 | =item C<preprocess> | |
80 | ||
81 | The value should be a code reference. This code reference is used to | |
82 | preprocess the current directory. The name of currently processed | |
83 | directory is in $File::Find::dir. Your preprocessing function is | |
84 | called after readdir() but before the loop that calls the wanted() | |
85 | function. It is called with a list of strings (actually file/directory | |
86 | names) and is expected to return a list of strings. The code can be | |
87 | used to sort the file/directory names alphabetically, numerically, | |
88 | or to filter out directory entries based on their name alone. When | |
89 | I<follow> or I<follow_fast> are in effect, C<preprocess> is a no-op. | |
90 | ||
91 | =item C<postprocess> | |
92 | ||
93 | The value should be a code reference. It is invoked just before leaving | |
94 | the currently processed directory. It is called in void context with no | |
95 | arguments. The name of the current directory is in $File::Find::dir. This | |
96 | hook is handy for summarizing a directory, such as calculating its disk | |
97 | usage. When I<follow> or I<follow_fast> are in effect, C<postprocess> is a | |
98 | no-op. | |
99 | ||
100 | =item C<follow> | |
101 | ||
102 | Causes symbolic links to be followed. Since directory trees with symbolic | |
103 | links (followed) may contain files more than once and may even have | |
104 | cycles, a hash has to be built up with an entry for each file. | |
105 | This might be expensive both in space and time for a large | |
106 | directory tree. See I<follow_fast> and I<follow_skip> below. | |
107 | If either I<follow> or I<follow_fast> is in effect: | |
108 | ||
109 | =over 6 | |
110 | ||
111 | =item * | |
112 | ||
113 | It is guaranteed that an I<lstat> has been called before the user's | |
114 | I<wanted()> function is called. This enables fast file checks involving S< _>. | |
115 | ||
116 | =item * | |
117 | ||
118 | There is a variable C<$File::Find::fullname> which holds the absolute | |
119 | pathname of the file with all symbolic links resolved | |
120 | ||
121 | =back | |
122 | ||
123 | =item C<follow_fast> | |
124 | ||
125 | This is similar to I<follow> except that it may report some files more | |
126 | than once. It does detect cycles, however. Since only symbolic links | |
127 | have to be hashed, this is much cheaper both in space and time. If | |
128 | processing a file more than once (by the user's I<wanted()> function) | |
129 | is worse than just taking time, the option I<follow> should be used. | |
130 | ||
131 | =item C<follow_skip> | |
132 | ||
133 | C<follow_skip==1>, which is the default, causes all files which are | |
134 | neither directories nor symbolic links to be ignored if they are about | |
135 | to be processed a second time. If a directory or a symbolic link | |
136 | are about to be processed a second time, File::Find dies. | |
137 | C<follow_skip==0> causes File::Find to die if any file is about to be | |
138 | processed a second time. | |
139 | C<follow_skip==2> causes File::Find to ignore any duplicate files and | |
140 | directories but to proceed normally otherwise. | |
141 | ||
142 | =item C<dangling_symlinks> | |
143 | ||
144 | If true and a code reference, will be called with the symbolic link | |
145 | name and the directory it lives in as arguments. Otherwise, if true | |
146 | and warnings are on, warning "symbolic_link_name is a dangling | |
147 | symbolic link\n" will be issued. If false, the dangling symbolic link | |
148 | will be silently ignored. | |
149 | ||
150 | =item C<no_chdir> | |
151 | ||
152 | Does not C<chdir()> to each directory as it recurses. The wanted() | |
153 | function will need to be aware of this, of course. In this case, | |
154 | C<$_> will be the same as C<$File::Find::name>. | |
155 | ||
156 | =item C<untaint> | |
157 | ||
158 | If find is used in taint-mode (-T command line switch or if EUID != UID | |
159 | or if EGID != GID) then internally directory names have to be untainted | |
160 | before they can be chdir'ed to. Therefore they are checked against a regular | |
161 | expression I<untaint_pattern>. Note that all names passed to the user's | |
162 | I<wanted()> function are still tainted. If this option is used while | |
163 | not in taint-mode, C<untaint> is a no-op. | |
164 | ||
165 | =item C<untaint_pattern> | |
166 | ||
167 | See above. This should be set using the C<qr> quoting operator. | |
168 | The default is set to C<qr|^([-+@\w./]+)$|>. | |
169 | Note that the parentheses are vital. | |
170 | ||
171 | =item C<untaint_skip> | |
172 | ||
173 | If set, a directory which fails the I<untaint_pattern> is skipped, | |
174 | including all its sub-directories. The default is to 'die' in such a case. | |
175 | ||
176 | =back | |
177 | ||
178 | =head2 The wanted function | |
179 | ||
180 | The wanted() function does whatever verifications you want on each | |
181 | file and directory. It takes no arguments but rather does its work | |
182 | through a collection of variables. | |
183 | ||
184 | =over 4 | |
185 | ||
186 | =item C<$File::Find::dir> is the current directory name, | |
187 | ||
188 | =item C<$_> is the current filename within that directory | |
189 | ||
190 | =item C<$File::Find::name> is the complete pathname to the file. | |
191 | ||
192 | =back | |
193 | ||
194 | Don't modify these variables. | |
195 | ||
196 | For example, when examining the file /some/path/foo.ext you will have: | |
197 | ||
198 | $File::Find::dir = /some/path/ | |
199 | $_ = foo.ext | |
200 | $File::Find::name = /some/path/foo.ext | |
201 | ||
202 | You are chdir()'d toC<$File::Find::dir> when the function is called, | |
203 | unless C<no_chdir> was specified. Note that when changing to | |
204 | directories is in effect the root directory (F</>) is a somewhat | |
205 | special case inasmuch as the concatenation of C<$File::Find::dir>, | |
206 | C<'/'> and C<$_> is not literally equal to C<$File::Find::name>. The | |
207 | table below summarizes all variants: | |
208 | ||
209 | $File::Find::name $File::Find::dir $_ | |
210 | default / / . | |
211 | no_chdir=>0 /etc / etc | |
212 | /etc/x /etc x | |
213 | ||
214 | no_chdir=>1 / / / | |
215 | /etc / /etc | |
216 | /etc/x /etc /etc/x | |
217 | ||
218 | ||
219 | When <follow> or <follow_fast> are in effect, there is | |
220 | also a C<$File::Find::fullname>. The function may set | |
221 | C<$File::Find::prune> to prune the tree unless C<bydepth> was | |
222 | specified. Unless C<follow> or C<follow_fast> is specified, for | |
223 | compatibility reasons (find.pl, find2perl) there are in addition the | |
224 | following globals available: C<$File::Find::topdir>, | |
225 | C<$File::Find::topdev>, C<$File::Find::topino>, | |
226 | C<$File::Find::topmode> and C<$File::Find::topnlink>. | |
227 | ||
228 | This library is useful for the C<find2perl> tool, which when fed, | |
229 | ||
230 | find2perl / -name .nfs\* -mtime +7 \ | |
231 | -exec rm -f {} \; -o -fstype nfs -prune | |
232 | ||
233 | produces something like: | |
234 | ||
235 | sub wanted { | |
236 | /^\.nfs.*\z/s && | |
237 | (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_)) && | |
238 | int(-M _) > 7 && | |
239 | unlink($_) | |
240 | || | |
241 | ($nlink || (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_))) && | |
242 | $dev < 0 && | |
243 | ($File::Find::prune = 1); | |
244 | } | |
245 | ||
246 | Notice the C<_> in the above C<int(-M _)>: the C<_> is a magical | |
247 | filehandle that caches the information from the preceding | |
248 | stat(), lstat(), or filetest. | |
249 | ||
250 | Here's another interesting wanted function. It will find all symbolic | |
251 | links that don't resolve: | |
252 | ||
253 | sub wanted { | |
254 | -l && !-e && print "bogus link: $File::Find::name\n"; | |
255 | } | |
256 | ||
257 | See also the script C<pfind> on CPAN for a nice application of this | |
258 | module. | |
259 | ||
260 | =head1 WARNINGS | |
261 | ||
262 | If you run your program with the C<-w> switch, or if you use the | |
263 | C<warnings> pragma, File::Find will report warnings for several weird | |
264 | situations. You can disable these warnings by putting the statement | |
265 | ||
266 | no warnings 'File::Find'; | |
267 | ||
268 | in the appropriate scope. See L<perllexwarn> for more info about lexical | |
269 | warnings. | |
270 | ||
271 | =head1 CAVEAT | |
272 | ||
273 | =over 2 | |
274 | ||
275 | =item $dont_use_nlink | |
276 | ||
277 | You can set the variable C<$File::Find::dont_use_nlink> to 1, if you want to | |
278 | force File::Find to always stat directories. This was used for file systems | |
279 | that do not have an C<nlink> count matching the number of sub-directories. | |
280 | Examples are ISO-9660 (CD-ROM), AFS, HPFS (OS/2 file system), FAT (DOS file | |
281 | system) and a couple of others. | |
282 | ||
283 | You shouldn't need to set this variable, since File::Find should now detect | |
284 | such file systems on-the-fly and switch itself to using stat. This works even | |
285 | for parts of your file system, like a mounted CD-ROM. | |
286 | ||
287 | If you do set C<$File::Find::dont_use_nlink> to 1, you will notice slow-downs. | |
288 | ||
289 | =item symlinks | |
290 | ||
291 | Be aware that the option to follow symbolic links can be dangerous. | |
292 | Depending on the structure of the directory tree (including symbolic | |
293 | links to directories) you might traverse a given (physical) directory | |
294 | more than once (only if C<follow_fast> is in effect). | |
295 | Furthermore, deleting or changing files in a symbolically linked directory | |
296 | might cause very unpleasant surprises, since you delete or change files | |
297 | in an unknown directory. | |
298 | ||
299 | =back | |
300 | ||
301 | =head1 NOTES | |
302 | ||
303 | =over 4 | |
304 | ||
305 | =item * | |
306 | ||
307 | Mac OS (Classic) users should note a few differences: | |
308 | ||
309 | =over 4 | |
310 | ||
311 | =item * | |
312 | ||
313 | The path separator is ':', not '/', and the current directory is denoted | |
314 | as ':', not '.'. You should be careful about specifying relative pathnames. | |
315 | While a full path always begins with a volume name, a relative pathname | |
316 | should always begin with a ':'. If specifying a volume name only, a | |
317 | trailing ':' is required. | |
318 | ||
319 | =item * | |
320 | ||
321 | C<$File::Find::dir> is guaranteed to end with a ':'. If C<$_> | |
322 | contains the name of a directory, that name may or may not end with a | |
323 | ':'. Likewise, C<$File::Find::name>, which contains the complete | |
324 | pathname to that directory, and C<$File::Find::fullname>, which holds | |
325 | the absolute pathname of that directory with all symbolic links resolved, | |
326 | may or may not end with a ':'. | |
327 | ||
328 | =item * | |
329 | ||
330 | The default C<untaint_pattern> (see above) on Mac OS is set to | |
331 | C<qr|^(.+)$|>. Note that the parentheses are vital. | |
332 | ||
333 | =item * | |
334 | ||
335 | The invisible system file "Icon\015" is ignored. While this file may | |
336 | appear in every directory, there are some more invisible system files | |
337 | on every volume, which are all located at the volume root level (i.e. | |
338 | "MacintoshHD:"). These system files are B<not> excluded automatically. | |
339 | Your filter may use the following code to recognize invisible files or | |
340 | directories (requires Mac::Files): | |
341 | ||
342 | use Mac::Files; | |
343 | ||
344 | # invisible() -- returns 1 if file/directory is invisible, | |
345 | # 0 if it's visible or undef if an error occurred | |
346 | ||
347 | sub invisible($) { | |
348 | my $file = shift; | |
349 | my ($fileCat, $fileInfo); | |
350 | my $invisible_flag = 1 << 14; | |
351 | ||
352 | if ( $fileCat = FSpGetCatInfo($file) ) { | |
353 | if ($fileInfo = $fileCat->ioFlFndrInfo() ) { | |
354 | return (($fileInfo->fdFlags & $invisible_flag) && 1); | |
355 | } | |
356 | } | |
357 | return undef; | |
358 | } | |
359 | ||
360 | Generally, invisible files are system files, unless an odd application | |
361 | decides to use invisible files for its own purposes. To distinguish | |
362 | such files from system files, you have to look at the B<type> and B<creator> | |
363 | file attributes. The MacPerl built-in functions C<GetFileInfo(FILE)> and | |
364 | C<SetFileInfo(CREATOR, TYPE, FILES)> offer access to these attributes | |
365 | (see MacPerl.pm for details). | |
366 | ||
367 | Files that appear on the desktop actually reside in an (hidden) directory | |
368 | named "Desktop Folder" on the particular disk volume. Note that, although | |
369 | all desktop files appear to be on the same "virtual" desktop, each disk | |
370 | volume actually maintains its own "Desktop Folder" directory. | |
371 | ||
372 | =back | |
373 | ||
374 | =back | |
375 | ||
376 | =head1 HISTORY | |
377 | ||
378 | File::Find used to produce incorrect results if called recursively. | |
379 | During the development of perl 5.8 this bug was fixed. | |
380 | The first fixed version of File::Find was 1.01. | |
381 | ||
382 | =cut | |
383 | ||
384 | our @ISA = qw(Exporter); | |
385 | our @EXPORT = qw(find finddepth); | |
386 | ||
387 | ||
388 | use strict; | |
389 | my $Is_VMS; | |
390 | my $Is_MacOS; | |
391 | ||
392 | require File::Basename; | |
393 | require File::Spec; | |
394 | ||
395 | # Should ideally be my() not our() but local() currently | |
396 | # refuses to operate on lexicals | |
397 | ||
398 | our %SLnkSeen; | |
399 | our ($wanted_callback, $avoid_nlink, $bydepth, $no_chdir, $follow, | |
400 | $follow_skip, $full_check, $untaint, $untaint_skip, $untaint_pat, | |
401 | $pre_process, $post_process, $dangling_symlinks); | |
402 | ||
403 | sub contract_name { | |
404 | my ($cdir,$fn) = @_; | |
405 | ||
406 | return substr($cdir,0,rindex($cdir,'/')) if $fn eq $File::Find::current_dir; | |
407 | ||
408 | $cdir = substr($cdir,0,rindex($cdir,'/')+1); | |
409 | ||
410 | $fn =~ s|^\./||; | |
411 | ||
412 | my $abs_name= $cdir . $fn; | |
413 | ||
414 | if (substr($fn,0,3) eq '../') { | |
415 | 1 while $abs_name =~ s!/[^/]*/\.\./!/!; | |
416 | } | |
417 | ||
418 | return $abs_name; | |
419 | } | |
420 | ||
421 | # return the absolute name of a directory or file | |
422 | sub contract_name_Mac { | |
423 | my ($cdir,$fn) = @_; | |
424 | my $abs_name; | |
425 | ||
426 | if ($fn =~ /^(:+)(.*)$/) { # valid pathname starting with a ':' | |
427 | ||
428 | my $colon_count = length ($1); | |
429 | if ($colon_count == 1) { | |
430 | $abs_name = $cdir . $2; | |
431 | return $abs_name; | |
432 | } | |
433 | else { | |
434 | # need to move up the tree, but | |
435 | # only if it's not a volume name | |
436 | for (my $i=1; $i<$colon_count; $i++) { | |
437 | unless ($cdir =~ /^[^:]+:$/) { # volume name | |
438 | $cdir =~ s/[^:]+:$//; | |
439 | } | |
440 | else { | |
441 | return undef; | |
442 | } | |
443 | } | |
444 | $abs_name = $cdir . $2; | |
445 | return $abs_name; | |
446 | } | |
447 | ||
448 | } | |
449 | else { | |
450 | ||
451 | # $fn may be a valid path to a directory or file or (dangling) | |
452 | # symlink, without a leading ':' | |
453 | if ( (-e $fn) || (-l $fn) ) { | |
454 | if ($fn =~ /^[^:]+:/) { # a volume name like DataHD:* | |
455 | return $fn; # $fn is already an absolute path | |
456 | } | |
457 | else { | |
458 | $abs_name = $cdir . $fn; | |
459 | return $abs_name; | |
460 | } | |
461 | } | |
462 | else { # argh!, $fn is not a valid directory/file | |
463 | return undef; | |
464 | } | |
465 | } | |
466 | } | |
467 | ||
468 | sub PathCombine($$) { | |
469 | my ($Base,$Name) = @_; | |
470 | my $AbsName; | |
471 | ||
472 | if ($Is_MacOS) { | |
473 | # $Name is the resolved symlink (always a full path on MacOS), | |
474 | # i.e. there's no need to call contract_name_Mac() | |
475 | $AbsName = $Name; | |
476 | ||
477 | # (simple) check for recursion | |
478 | if ( ( $Base =~ /^$AbsName/) && (-d $AbsName) ) { # recursion | |
479 | return undef; | |
480 | } | |
481 | } | |
482 | else { | |
483 | if (substr($Name,0,1) eq '/') { | |
484 | $AbsName= $Name; | |
485 | } | |
486 | else { | |
487 | $AbsName= contract_name($Base,$Name); | |
488 | } | |
489 | ||
490 | # (simple) check for recursion | |
491 | my $newlen= length($AbsName); | |
492 | if ($newlen <= length($Base)) { | |
493 | if (($newlen == length($Base) || substr($Base,$newlen,1) eq '/') | |
494 | && $AbsName eq substr($Base,0,$newlen)) | |
495 | { | |
496 | return undef; | |
497 | } | |
498 | } | |
499 | } | |
500 | return $AbsName; | |
501 | } | |
502 | ||
503 | sub Follow_SymLink($) { | |
504 | my ($AbsName) = @_; | |
505 | ||
506 | my ($NewName,$DEV, $INO); | |
507 | ($DEV, $INO)= lstat $AbsName; | |
508 | ||
509 | while (-l _) { | |
510 | if ($SLnkSeen{$DEV, $INO}++) { | |
511 | if ($follow_skip < 2) { | |
512 | die "$AbsName is encountered a second time"; | |
513 | } | |
514 | else { | |
515 | return undef; | |
516 | } | |
517 | } | |
518 | $NewName= PathCombine($AbsName, readlink($AbsName)); | |
519 | unless(defined $NewName) { | |
520 | if ($follow_skip < 2) { | |
521 | die "$AbsName is a recursive symbolic link"; | |
522 | } | |
523 | else { | |
524 | return undef; | |
525 | } | |
526 | } | |
527 | else { | |
528 | $AbsName= $NewName; | |
529 | } | |
530 | ($DEV, $INO) = lstat($AbsName); | |
531 | return undef unless defined $DEV; # dangling symbolic link | |
532 | } | |
533 | ||
534 | if ($full_check && defined $DEV && $SLnkSeen{$DEV, $INO}++) { | |
535 | if ( ($follow_skip < 1) || ((-d _) && ($follow_skip < 2)) ) { | |
536 | die "$AbsName encountered a second time"; | |
537 | } | |
538 | else { | |
539 | return undef; | |
540 | } | |
541 | } | |
542 | ||
543 | return $AbsName; | |
544 | } | |
545 | ||
546 | our($dir, $name, $fullname, $prune); | |
547 | sub _find_dir_symlnk($$$); | |
548 | sub _find_dir($$$); | |
549 | ||
550 | # check whether or not a scalar variable is tainted | |
551 | # (code straight from the Camel, 3rd ed., page 561) | |
552 | sub is_tainted_pp { | |
553 | my $arg = shift; | |
554 | my $nada = substr($arg, 0, 0); # zero-length | |
555 | local $@; | |
556 | eval { eval "# $nada" }; | |
557 | return length($@) != 0; | |
558 | } | |
559 | ||
560 | sub _find_opt { | |
561 | my $wanted = shift; | |
562 | die "invalid top directory" unless defined $_[0]; | |
563 | ||
564 | # This function must local()ize everything because callbacks may | |
565 | # call find() or finddepth() | |
566 | ||
567 | local %SLnkSeen; | |
568 | local ($wanted_callback, $avoid_nlink, $bydepth, $no_chdir, $follow, | |
569 | $follow_skip, $full_check, $untaint, $untaint_skip, $untaint_pat, | |
570 | $pre_process, $post_process, $dangling_symlinks); | |
571 | local($dir, $name, $fullname, $prune); | |
572 | ||
573 | my $cwd = $wanted->{bydepth} ? Cwd::fastcwd() : Cwd::getcwd(); | |
574 | my $cwd_untainted = $cwd; | |
575 | my $check_t_cwd = 1; | |
576 | $wanted_callback = $wanted->{wanted}; | |
577 | $bydepth = $wanted->{bydepth}; | |
578 | $pre_process = $wanted->{preprocess}; | |
579 | $post_process = $wanted->{postprocess}; | |
580 | $no_chdir = $wanted->{no_chdir}; | |
581 | $full_check = $wanted->{follow}; | |
582 | $follow = $full_check || $wanted->{follow_fast}; | |
583 | $follow_skip = $wanted->{follow_skip}; | |
584 | $untaint = $wanted->{untaint}; | |
585 | $untaint_pat = $wanted->{untaint_pattern}; | |
586 | $untaint_skip = $wanted->{untaint_skip}; | |
587 | $dangling_symlinks = $wanted->{dangling_symlinks}; | |
588 | ||
589 | # for compatibility reasons (find.pl, find2perl) | |
590 | local our ($topdir, $topdev, $topino, $topmode, $topnlink); | |
591 | ||
592 | # a symbolic link to a directory doesn't increase the link count | |
593 | $avoid_nlink = $follow || $File::Find::dont_use_nlink; | |
594 | ||
595 | my ($abs_dir, $Is_Dir); | |
596 | ||
597 | Proc_Top_Item: | |
598 | foreach my $TOP (@_) { | |
599 | my $top_item = $TOP; | |
600 | ||
601 | if ($Is_MacOS) { | |
602 | ($topdev,$topino,$topmode,$topnlink) = $follow ? stat $top_item : lstat $top_item; | |
603 | $top_item = ":$top_item" | |
604 | if ( (-d _) && ( $top_item !~ /:/ ) ); | |
605 | } | |
606 | else { | |
607 | $top_item =~ s|/\z|| unless $top_item eq '/'; | |
608 | ($topdev,$topino,$topmode,$topnlink) = $follow ? stat $top_item : lstat $top_item; | |
609 | } | |
610 | ||
611 | $Is_Dir= 0; | |
612 | ||
613 | if ($follow) { | |
614 | ||
615 | if ($Is_MacOS) { | |
616 | $cwd = "$cwd:" unless ($cwd =~ /:$/); # for safety | |
617 | ||
618 | if ($top_item eq $File::Find::current_dir) { | |
619 | $abs_dir = $cwd; | |
620 | } | |
621 | else { | |
622 | $abs_dir = contract_name_Mac($cwd, $top_item); | |
623 | unless (defined $abs_dir) { | |
624 | warnings::warnif "Can't determine absolute path for $top_item (No such file or directory)\n"; | |
625 | next Proc_Top_Item; | |
626 | } | |
627 | } | |
628 | ||
629 | } | |
630 | else { | |
631 | if (substr($top_item,0,1) eq '/') { | |
632 | $abs_dir = $top_item; | |
633 | } | |
634 | elsif ($top_item eq $File::Find::current_dir) { | |
635 | $abs_dir = $cwd; | |
636 | } | |
637 | else { # care about any ../ | |
638 | $abs_dir = contract_name("$cwd/",$top_item); | |
639 | } | |
640 | } | |
641 | $abs_dir= Follow_SymLink($abs_dir); | |
642 | unless (defined $abs_dir) { | |
643 | if ($dangling_symlinks) { | |
644 | if (ref $dangling_symlinks eq 'CODE') { | |
645 | $dangling_symlinks->($top_item, $cwd); | |
646 | } else { | |
647 | warnings::warnif "$top_item is a dangling symbolic link\n"; | |
648 | } | |
649 | } | |
650 | next Proc_Top_Item; | |
651 | } | |
652 | ||
653 | if (-d _) { | |
654 | _find_dir_symlnk($wanted, $abs_dir, $top_item); | |
655 | $Is_Dir= 1; | |
656 | } | |
657 | } | |
658 | else { # no follow | |
659 | $topdir = $top_item; | |
660 | unless (defined $topnlink) { | |
661 | warnings::warnif "Can't stat $top_item: $!\n"; | |
662 | next Proc_Top_Item; | |
663 | } | |
664 | if (-d _) { | |
665 | $top_item =~ s/\.dir\z// if $Is_VMS; | |
666 | _find_dir($wanted, $top_item, $topnlink); | |
667 | $Is_Dir= 1; | |
668 | } | |
669 | else { | |
670 | $abs_dir= $top_item; | |
671 | } | |
672 | } | |
673 | ||
674 | unless ($Is_Dir) { | |
675 | unless (($_,$dir) = File::Basename::fileparse($abs_dir)) { | |
676 | if ($Is_MacOS) { | |
677 | ($dir,$_) = (':', $top_item); # $File::Find::dir, $_ | |
678 | } | |
679 | else { | |
680 | ($dir,$_) = ('./', $top_item); | |
681 | } | |
682 | } | |
683 | ||
684 | $abs_dir = $dir; | |
685 | if (( $untaint ) && (is_tainted($dir) )) { | |
686 | ( $abs_dir ) = $dir =~ m|$untaint_pat|; | |
687 | unless (defined $abs_dir) { | |
688 | if ($untaint_skip == 0) { | |
689 | die "directory $dir is still tainted"; | |
690 | } | |
691 | else { | |
692 | next Proc_Top_Item; | |
693 | } | |
694 | } | |
695 | } | |
696 | ||
697 | unless ($no_chdir || chdir $abs_dir) { | |
698 | warnings::warnif "Couldn't chdir $abs_dir: $!\n"; | |
699 | next Proc_Top_Item; | |
700 | } | |
701 | ||
702 | $name = $abs_dir . $_; # $File::Find::name | |
703 | ||
704 | { $wanted_callback->() }; # protect against wild "next" | |
705 | ||
706 | } | |
707 | ||
708 | unless ( $no_chdir ) { | |
709 | if ( ($check_t_cwd) && (($untaint) && (is_tainted($cwd) )) ) { | |
710 | ( $cwd_untainted ) = $cwd =~ m|$untaint_pat|; | |
711 | unless (defined $cwd_untainted) { | |
712 | die "insecure cwd in find(depth)"; | |
713 | } | |
714 | $check_t_cwd = 0; | |
715 | } | |
716 | unless (chdir $cwd_untainted) { | |
717 | die "Can't cd to $cwd: $!\n"; | |
718 | } | |
719 | } | |
720 | } | |
721 | } | |
722 | ||
723 | # API: | |
724 | # $wanted | |
725 | # $p_dir : "parent directory" | |
726 | # $nlink : what came back from the stat | |
727 | # preconditions: | |
728 | # chdir (if not no_chdir) to dir | |
729 | ||
730 | sub _find_dir($$$) { | |
731 | my ($wanted, $p_dir, $nlink) = @_; | |
732 | my ($CdLvl,$Level) = (0,0); | |
733 | my @Stack; | |
734 | my @filenames; | |
735 | my ($subcount,$sub_nlink); | |
736 | my $SE= []; | |
737 | my $dir_name= $p_dir; | |
738 | my $dir_pref; | |
739 | my $dir_rel = $File::Find::current_dir; | |
740 | my $tainted = 0; | |
741 | my $no_nlink; | |
742 | ||
743 | if ($Is_MacOS) { | |
744 | $dir_pref= ($p_dir =~ /:$/) ? $p_dir : "$p_dir:"; # preface | |
745 | } | |
746 | else { | |
747 | $dir_pref= ( $p_dir eq '/' ? '/' : "$p_dir/" ); | |
748 | } | |
749 | ||
750 | local ($dir, $name, $prune, *DIR); | |
751 | ||
752 | unless ( $no_chdir || ($p_dir eq $File::Find::current_dir)) { | |
753 | my $udir = $p_dir; | |
754 | if (( $untaint ) && (is_tainted($p_dir) )) { | |
755 | ( $udir ) = $p_dir =~ m|$untaint_pat|; | |
756 | unless (defined $udir) { | |
757 | if ($untaint_skip == 0) { | |
758 | die "directory $p_dir is still tainted"; | |
759 | } | |
760 | else { | |
761 | return; | |
762 | } | |
763 | } | |
764 | } | |
765 | unless (chdir $udir) { | |
766 | warnings::warnif "Can't cd to $udir: $!\n"; | |
767 | return; | |
768 | } | |
769 | } | |
770 | ||
771 | # push the starting directory | |
772 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; | |
773 | ||
774 | if ($Is_MacOS) { | |
775 | $p_dir = $dir_pref; # ensure trailing ':' | |
776 | } | |
777 | ||
778 | while (defined $SE) { | |
779 | unless ($bydepth) { | |
780 | $dir= $p_dir; # $File::Find::dir | |
781 | $name= $dir_name; # $File::Find::name | |
782 | $_= ($no_chdir ? $dir_name : $dir_rel ); # $_ | |
783 | # prune may happen here | |
784 | $prune= 0; | |
785 | { $wanted_callback->() }; # protect against wild "next" | |
786 | next if $prune; | |
787 | } | |
788 | ||
789 | # change to that directory | |
790 | unless ($no_chdir || ($dir_rel eq $File::Find::current_dir)) { | |
791 | my $udir= $dir_rel; | |
792 | if ( ($untaint) && (($tainted) || ($tainted = is_tainted($dir_rel) )) ) { | |
793 | ( $udir ) = $dir_rel =~ m|$untaint_pat|; | |
794 | unless (defined $udir) { | |
795 | if ($untaint_skip == 0) { | |
796 | if ($Is_MacOS) { | |
797 | die "directory ($p_dir) $dir_rel is still tainted"; | |
798 | } | |
799 | else { | |
800 | die "directory (" . ($p_dir ne '/' ? $p_dir : '') . "/) $dir_rel is still tainted"; | |
801 | } | |
802 | } else { # $untaint_skip == 1 | |
803 | next; | |
804 | } | |
805 | } | |
806 | } | |
807 | unless (chdir $udir) { | |
808 | if ($Is_MacOS) { | |
809 | warnings::warnif "Can't cd to ($p_dir) $udir: $!\n"; | |
810 | } | |
811 | else { | |
812 | warnings::warnif "Can't cd to (" . | |
813 | ($p_dir ne '/' ? $p_dir : '') . "/) $udir: $!\n"; | |
814 | } | |
815 | next; | |
816 | } | |
817 | $CdLvl++; | |
818 | } | |
819 | ||
820 | if ($Is_MacOS) { | |
821 | $dir_name = "$dir_name:" unless ($dir_name =~ /:$/); | |
822 | } | |
823 | ||
824 | $dir= $dir_name; # $File::Find::dir | |
825 | ||
826 | # Get the list of files in the current directory. | |
827 | unless (opendir DIR, ($no_chdir ? $dir_name : $File::Find::current_dir)) { | |
828 | warnings::warnif "Can't opendir($dir_name): $!\n"; | |
829 | next; | |
830 | } | |
831 | @filenames = readdir DIR; | |
832 | closedir(DIR); | |
833 | @filenames = $pre_process->(@filenames) if $pre_process; | |
834 | push @Stack,[$CdLvl,$dir_name,"",-2] if $post_process; | |
835 | ||
836 | # default: use whatever was specifid | |
837 | # (if $nlink >= 2, and $avoid_nlink == 0, this will switch back) | |
838 | $no_nlink = $avoid_nlink; | |
839 | # if dir has wrong nlink count, force switch to slower stat method | |
840 | $no_nlink = 1 if ($nlink < 2); | |
841 | ||
842 | if ($nlink == 2 && !$no_nlink) { | |
843 | # This dir has no subdirectories. | |
844 | for my $FN (@filenames) { | |
845 | next if $FN =~ $File::Find::skip_pattern; | |
846 | ||
847 | $name = $dir_pref . $FN; # $File::Find::name | |
848 | $_ = ($no_chdir ? $name : $FN); # $_ | |
849 | { $wanted_callback->() }; # protect against wild "next" | |
850 | } | |
851 | ||
852 | } | |
853 | else { | |
854 | # This dir has subdirectories. | |
855 | $subcount = $nlink - 2; | |
856 | ||
857 | for my $FN (@filenames) { | |
858 | next if $FN =~ $File::Find::skip_pattern; | |
859 | if ($subcount > 0 || $no_nlink) { | |
860 | # Seen all the subdirs? | |
861 | # check for directoriness. | |
862 | # stat is faster for a file in the current directory | |
863 | $sub_nlink = (lstat ($no_chdir ? $dir_pref . $FN : $FN))[3]; | |
864 | ||
865 | if (-d _) { | |
866 | --$subcount; | |
867 | $FN =~ s/\.dir\z// if $Is_VMS; | |
868 | push @Stack,[$CdLvl,$dir_name,$FN,$sub_nlink]; | |
869 | } | |
870 | else { | |
871 | $name = $dir_pref . $FN; # $File::Find::name | |
872 | $_= ($no_chdir ? $name : $FN); # $_ | |
873 | { $wanted_callback->() }; # protect against wild "next" | |
874 | } | |
875 | } | |
876 | else { | |
877 | $name = $dir_pref . $FN; # $File::Find::name | |
878 | $_= ($no_chdir ? $name : $FN); # $_ | |
879 | { $wanted_callback->() }; # protect against wild "next" | |
880 | } | |
881 | } | |
882 | } | |
883 | } | |
884 | continue { | |
885 | while ( defined ($SE = pop @Stack) ) { | |
886 | ($Level, $p_dir, $dir_rel, $nlink) = @$SE; | |
887 | if ($CdLvl > $Level && !$no_chdir) { | |
888 | my $tmp; | |
889 | if ($Is_MacOS) { | |
890 | $tmp = (':' x ($CdLvl-$Level)) . ':'; | |
891 | } | |
892 | else { | |
893 | $tmp = join('/',('..') x ($CdLvl-$Level)); | |
894 | } | |
895 | die "Can't cd to $dir_name" . $tmp | |
896 | unless chdir ($tmp); | |
897 | $CdLvl = $Level; | |
898 | } | |
899 | ||
900 | if ($Is_MacOS) { | |
901 | # $pdir always has a trailing ':', except for the starting dir, | |
902 | # where $dir_rel eq ':' | |
903 | $dir_name = "$p_dir$dir_rel"; | |
904 | $dir_pref = "$dir_name:"; | |
905 | } | |
906 | else { | |
907 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); | |
908 | $dir_pref = "$dir_name/"; | |
909 | } | |
910 | ||
911 | if ( $nlink == -2 ) { | |
912 | $name = $dir = $p_dir; # $File::Find::name / dir | |
913 | $_ = $File::Find::current_dir; | |
914 | $post_process->(); # End-of-directory processing | |
915 | } | |
916 | elsif ( $nlink < 0 ) { # must be finddepth, report dirname now | |
917 | $name = $dir_name; | |
918 | if ($Is_MacOS) { | |
919 | if ($dir_rel eq ':') { # must be the top dir, where we started | |
920 | $name =~ s|:$||; # $File::Find::name | |
921 | $p_dir = "$p_dir:" unless ($p_dir =~ /:$/); | |
922 | } | |
923 | $dir = $p_dir; # $File::Find::dir | |
924 | $_ = ($no_chdir ? $name : $dir_rel); # $_ | |
925 | } | |
926 | else { | |
927 | if ( substr($name,-2) eq '/.' ) { | |
928 | substr($name, length($name) == 2 ? -1 : -2) = ''; | |
929 | } | |
930 | $dir = $p_dir; | |
931 | $_ = ($no_chdir ? $dir_name : $dir_rel ); | |
932 | if ( substr($_,-2) eq '/.' ) { | |
933 | substr($_, length($_) == 2 ? -1 : -2) = ''; | |
934 | } | |
935 | } | |
936 | { $wanted_callback->() }; # protect against wild "next" | |
937 | } | |
938 | else { | |
939 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; | |
940 | last; | |
941 | } | |
942 | } | |
943 | } | |
944 | } | |
945 | ||
946 | ||
947 | # API: | |
948 | # $wanted | |
949 | # $dir_loc : absolute location of a dir | |
950 | # $p_dir : "parent directory" | |
951 | # preconditions: | |
952 | # chdir (if not no_chdir) to dir | |
953 | ||
954 | sub _find_dir_symlnk($$$) { | |
955 | my ($wanted, $dir_loc, $p_dir) = @_; # $dir_loc is the absolute directory | |
956 | my @Stack; | |
957 | my @filenames; | |
958 | my $new_loc; | |
959 | my $updir_loc = $dir_loc; # untainted parent directory | |
960 | my $SE = []; | |
961 | my $dir_name = $p_dir; | |
962 | my $dir_pref; | |
963 | my $loc_pref; | |
964 | my $dir_rel = $File::Find::current_dir; | |
965 | my $byd_flag; # flag for pending stack entry if $bydepth | |
966 | my $tainted = 0; | |
967 | my $ok = 1; | |
968 | ||
969 | if ($Is_MacOS) { | |
970 | $dir_pref = ($p_dir =~ /:$/) ? "$p_dir" : "$p_dir:"; | |
971 | $loc_pref = ($dir_loc =~ /:$/) ? "$dir_loc" : "$dir_loc:"; | |
972 | } else { | |
973 | $dir_pref = ( $p_dir eq '/' ? '/' : "$p_dir/" ); | |
974 | $loc_pref = ( $dir_loc eq '/' ? '/' : "$dir_loc/" ); | |
975 | } | |
976 | ||
977 | local ($dir, $name, $fullname, $prune, *DIR); | |
978 | ||
979 | unless ($no_chdir) { | |
980 | # untaint the topdir | |
981 | if (( $untaint ) && (is_tainted($dir_loc) )) { | |
982 | ( $updir_loc ) = $dir_loc =~ m|$untaint_pat|; # parent dir, now untainted | |
983 | # once untainted, $updir_loc is pushed on the stack (as parent directory); | |
984 | # hence, we don't need to untaint the parent directory every time we chdir | |
985 | # to it later | |
986 | unless (defined $updir_loc) { | |
987 | if ($untaint_skip == 0) { | |
988 | die "directory $dir_loc is still tainted"; | |
989 | } | |
990 | else { | |
991 | return; | |
992 | } | |
993 | } | |
994 | } | |
995 | $ok = chdir($updir_loc) unless ($p_dir eq $File::Find::current_dir); | |
996 | unless ($ok) { | |
997 | warnings::warnif "Can't cd to $updir_loc: $!\n"; | |
998 | return; | |
999 | } | |
1000 | } | |
1001 | ||
1002 | push @Stack,[$dir_loc,$updir_loc,$p_dir,$dir_rel,-1] if $bydepth; | |
1003 | ||
1004 | if ($Is_MacOS) { | |
1005 | $p_dir = $dir_pref; # ensure trailing ':' | |
1006 | } | |
1007 | ||
1008 | while (defined $SE) { | |
1009 | ||
1010 | unless ($bydepth) { | |
1011 | # change (back) to parent directory (always untainted) | |
1012 | unless ($no_chdir) { | |
1013 | unless (chdir $updir_loc) { | |
1014 | warnings::warnif "Can't cd to $updir_loc: $!\n"; | |
1015 | next; | |
1016 | } | |
1017 | } | |
1018 | $dir= $p_dir; # $File::Find::dir | |
1019 | $name= $dir_name; # $File::Find::name | |
1020 | $_= ($no_chdir ? $dir_name : $dir_rel ); # $_ | |
1021 | $fullname= $dir_loc; # $File::Find::fullname | |
1022 | # prune may happen here | |
1023 | $prune= 0; | |
1024 | lstat($_); # make sure file tests with '_' work | |
1025 | { $wanted_callback->() }; # protect against wild "next" | |
1026 | next if $prune; | |
1027 | } | |
1028 | ||
1029 | # change to that directory | |
1030 | unless ($no_chdir || ($dir_rel eq $File::Find::current_dir)) { | |
1031 | $updir_loc = $dir_loc; | |
1032 | if ( ($untaint) && (($tainted) || ($tainted = is_tainted($dir_loc) )) ) { | |
1033 | # untaint $dir_loc, what will be pushed on the stack as (untainted) parent dir | |
1034 | ( $updir_loc ) = $dir_loc =~ m|$untaint_pat|; | |
1035 | unless (defined $updir_loc) { | |
1036 | if ($untaint_skip == 0) { | |
1037 | die "directory $dir_loc is still tainted"; | |
1038 | } | |
1039 | else { | |
1040 | next; | |
1041 | } | |
1042 | } | |
1043 | } | |
1044 | unless (chdir $updir_loc) { | |
1045 | warnings::warnif "Can't cd to $updir_loc: $!\n"; | |
1046 | next; | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | if ($Is_MacOS) { | |
1051 | $dir_name = "$dir_name:" unless ($dir_name =~ /:$/); | |
1052 | } | |
1053 | ||
1054 | $dir = $dir_name; # $File::Find::dir | |
1055 | ||
1056 | # Get the list of files in the current directory. | |
1057 | unless (opendir DIR, ($no_chdir ? $dir_loc : $File::Find::current_dir)) { | |
1058 | warnings::warnif "Can't opendir($dir_loc): $!\n"; | |
1059 | next; | |
1060 | } | |
1061 | @filenames = readdir DIR; | |
1062 | closedir(DIR); | |
1063 | ||
1064 | for my $FN (@filenames) { | |
1065 | next if $FN =~ $File::Find::skip_pattern; | |
1066 | ||
1067 | # follow symbolic links / do an lstat | |
1068 | $new_loc = Follow_SymLink($loc_pref.$FN); | |
1069 | ||
1070 | # ignore if invalid symlink | |
1071 | next unless defined $new_loc; | |
1072 | ||
1073 | if (-d _) { | |
1074 | push @Stack,[$new_loc,$updir_loc,$dir_name,$FN,1]; | |
1075 | } | |
1076 | else { | |
1077 | $fullname = $new_loc; # $File::Find::fullname | |
1078 | $name = $dir_pref . $FN; # $File::Find::name | |
1079 | $_ = ($no_chdir ? $name : $FN); # $_ | |
1080 | { $wanted_callback->() }; # protect against wild "next" | |
1081 | } | |
1082 | } | |
1083 | ||
1084 | } | |
1085 | continue { | |
1086 | while (defined($SE = pop @Stack)) { | |
1087 | ($dir_loc, $updir_loc, $p_dir, $dir_rel, $byd_flag) = @$SE; | |
1088 | if ($Is_MacOS) { | |
1089 | # $p_dir always has a trailing ':', except for the starting dir, | |
1090 | # where $dir_rel eq ':' | |
1091 | $dir_name = "$p_dir$dir_rel"; | |
1092 | $dir_pref = "$dir_name:"; | |
1093 | $loc_pref = ($dir_loc =~ /:$/) ? $dir_loc : "$dir_loc:"; | |
1094 | } | |
1095 | else { | |
1096 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); | |
1097 | $dir_pref = "$dir_name/"; | |
1098 | $loc_pref = "$dir_loc/"; | |
1099 | } | |
1100 | if ( $byd_flag < 0 ) { # must be finddepth, report dirname now | |
1101 | unless ($no_chdir || ($dir_rel eq $File::Find::current_dir)) { | |
1102 | unless (chdir $updir_loc) { # $updir_loc (parent dir) is always untainted | |
1103 | warnings::warnif "Can't cd to $updir_loc: $!\n"; | |
1104 | next; | |
1105 | } | |
1106 | } | |
1107 | $fullname = $dir_loc; # $File::Find::fullname | |
1108 | $name = $dir_name; # $File::Find::name | |
1109 | if ($Is_MacOS) { | |
1110 | if ($dir_rel eq ':') { # must be the top dir, where we started | |
1111 | $name =~ s|:$||; # $File::Find::name | |
1112 | $p_dir = "$p_dir:" unless ($p_dir =~ /:$/); | |
1113 | } | |
1114 | $dir = $p_dir; # $File::Find::dir | |
1115 | $_ = ($no_chdir ? $name : $dir_rel); # $_ | |
1116 | } | |
1117 | else { | |
1118 | if ( substr($name,-2) eq '/.' ) { | |
1119 | substr($name, length($name) == 2 ? -1 : -2) = ''; # $File::Find::name | |
1120 | } | |
1121 | $dir = $p_dir; # $File::Find::dir | |
1122 | $_ = ($no_chdir ? $dir_name : $dir_rel); # $_ | |
1123 | if ( substr($_,-2) eq '/.' ) { | |
1124 | substr($_, length($_) == 2 ? -1 : -2) = ''; | |
1125 | } | |
1126 | } | |
1127 | ||
1128 | lstat($_); # make sure file tests with '_' work | |
1129 | { $wanted_callback->() }; # protect against wild "next" | |
1130 | } | |
1131 | else { | |
1132 | push @Stack,[$dir_loc, $updir_loc, $p_dir, $dir_rel,-1] if $bydepth; | |
1133 | last; | |
1134 | } | |
1135 | } | |
1136 | } | |
1137 | } | |
1138 | ||
1139 | ||
1140 | sub wrap_wanted { | |
1141 | my $wanted = shift; | |
1142 | if ( ref($wanted) eq 'HASH' ) { | |
1143 | if ( $wanted->{follow} || $wanted->{follow_fast}) { | |
1144 | $wanted->{follow_skip} = 1 unless defined $wanted->{follow_skip}; | |
1145 | } | |
1146 | if ( $wanted->{untaint} ) { | |
1147 | $wanted->{untaint_pattern} = $File::Find::untaint_pattern | |
1148 | unless defined $wanted->{untaint_pattern}; | |
1149 | $wanted->{untaint_skip} = 0 unless defined $wanted->{untaint_skip}; | |
1150 | } | |
1151 | return $wanted; | |
1152 | } | |
1153 | else { | |
1154 | return { wanted => $wanted }; | |
1155 | } | |
1156 | } | |
1157 | ||
1158 | sub find { | |
1159 | my $wanted = shift; | |
1160 | _find_opt(wrap_wanted($wanted), @_); | |
1161 | } | |
1162 | ||
1163 | sub finddepth { | |
1164 | my $wanted = wrap_wanted(shift); | |
1165 | $wanted->{bydepth} = 1; | |
1166 | _find_opt($wanted, @_); | |
1167 | } | |
1168 | ||
1169 | # default | |
1170 | $File::Find::skip_pattern = qr/^\.{1,2}\z/; | |
1171 | $File::Find::untaint_pattern = qr|^([-+@\w./]+)$|; | |
1172 | ||
1173 | # These are hard-coded for now, but may move to hint files. | |
1174 | if ($^O eq 'VMS') { | |
1175 | $Is_VMS = 1; | |
1176 | $File::Find::dont_use_nlink = 1; | |
1177 | } | |
1178 | elsif ($^O eq 'MacOS') { | |
1179 | $Is_MacOS = 1; | |
1180 | $File::Find::dont_use_nlink = 1; | |
1181 | $File::Find::skip_pattern = qr/^Icon\015\z/; | |
1182 | $File::Find::untaint_pattern = qr|^(.+)$|; | |
1183 | } | |
1184 | ||
1185 | # this _should_ work properly on all platforms | |
1186 | # where File::Find can be expected to work | |
1187 | $File::Find::current_dir = File::Spec->curdir || '.'; | |
1188 | ||
1189 | $File::Find::dont_use_nlink = 1 | |
1190 | if $^O eq 'os2' || $^O eq 'dos' || $^O eq 'amigaos' || $^O eq 'MSWin32' || | |
1191 | $^O eq 'cygwin' || $^O eq 'epoc' || $^O eq 'qnx' || | |
1192 | $^O eq 'nto'; | |
1193 | ||
1194 | # Set dont_use_nlink in your hint file if your system's stat doesn't | |
1195 | # report the number of links in a directory as an indication | |
1196 | # of the number of files. | |
1197 | # See, e.g. hints/machten.sh for MachTen 2.2. | |
1198 | unless ($File::Find::dont_use_nlink) { | |
1199 | require Config; | |
1200 | $File::Find::dont_use_nlink = 1 if ($Config::Config{'dont_use_nlink'}); | |
1201 | } | |
1202 | ||
1203 | # We need a function that checks if a scalar is tainted. Either use the | |
1204 | # Scalar::Util module's tainted() function or our (slower) pure Perl | |
1205 | # fallback is_tainted_pp() | |
1206 | { | |
1207 | local $@; | |
1208 | eval { require Scalar::Util }; | |
1209 | *is_tainted = $@ ? \&is_tainted_pp : \&Scalar::Util::tainted; | |
1210 | } | |
1211 | ||
1212 | 1; |