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; |
---|