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1 | package File::Find; |
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2 | use 5.005_64; |
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3 | require Exporter; |
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4 | require Cwd; |
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5 | |
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6 | =head1 NAME |
7 | |
8 | find - traverse a file tree |
9 | |
10 | finddepth - traverse a directory structure depth-first |
11 | |
12 | =head1 SYNOPSIS |
13 | |
14 | use File::Find; |
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15 | find(\&wanted, '/foo', '/bar'); |
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16 | sub wanted { ... } |
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17 | |
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18 | use File::Find; |
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19 | finddepth(\&wanted, '/foo', '/bar'); |
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20 | sub wanted { ... } |
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21 | |
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22 | use File::Find; |
23 | find({ wanted => \&process, follow => 1 }, '.'); |
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24 | |
25 | =head1 DESCRIPTION |
26 | |
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27 | The first argument to find() is either a hash reference describing the |
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28 | operations to be performed for each file, or a code reference. |
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29 | |
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30 | Here are the possible keys for the hash: |
31 | |
32 | =over 3 |
33 | |
34 | =item C<wanted> |
35 | |
36 | The value should be a code reference. This code reference is called |
37 | I<the wanted() function> below. |
38 | |
39 | =item C<bydepth> |
40 | |
41 | Reports the name of a directory only AFTER all its entries |
42 | have been reported. Entry point finddepth() is a shortcut for |
43 | specifying C<{ bydepth => 1 }> in the first argument of find(). |
44 | |
45 | =item C<follow> |
46 | |
47 | Causes symbolic links to be followed. Since directory trees with symbolic |
48 | links (followed) may contain files more than once and may even have |
49 | cycles, a hash has to be built up with an entry for each file. |
50 | This might be expensive both in space and time for a large |
51 | directory tree. See I<follow_fast> and I<follow_skip> below. |
52 | If either I<follow> or I<follow_fast> is in effect: |
53 | |
54 | =over 6 |
55 | |
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56 | =item * |
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57 | |
58 | It is guarantueed that an I<lstat> has been called before the user's |
59 | I<wanted()> function is called. This enables fast file checks involving S< _>. |
60 | |
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61 | =item * |
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62 | |
63 | There is a variable C<$File::Find::fullname> which holds the absolute |
64 | pathname of the file with all symbolic links resolved |
65 | |
66 | =back |
67 | |
68 | =item C<follow_fast> |
69 | |
70 | This is similar to I<follow> except that it may report some files |
71 | more than once. It does detect cycles however. |
72 | Since only symbolic links have to be hashed, this is |
73 | much cheaper both in space and time. |
74 | If processing a file more than once (by the user's I<wanted()> function) |
75 | is worse than just taking time, the option I<follow> should be used. |
76 | |
77 | =item C<follow_skip> |
78 | |
79 | C<follow_skip==1>, which is the default, causes all files which are |
80 | neither directories nor symbolic links to be ignored if they are about |
81 | to be processed a second time. If a directory or a symbolic link |
82 | are about to be processed a second time, File::Find dies. |
83 | C<follow_skip==0> causes File::Find to die if any file is about to be |
84 | processed a second time. |
85 | C<follow_skip==2> causes File::Find to ignore any duplicate files and |
86 | dirctories but to proceed normally otherwise. |
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87 | |
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88 | |
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89 | =item C<no_chdir> |
90 | |
91 | Does not C<chdir()> to each directory as it recurses. The wanted() |
92 | function will need to be aware of this, of course. In this case, |
93 | C<$_> will be the same as C<$File::Find::name>. |
94 | |
95 | =item C<untaint> |
96 | |
97 | If find is used in taint-mode (-T command line switch or if EUID != UID |
98 | or if EGID != GID) then internally directory names have to be untainted |
99 | before they can be cd'ed to. Therefore they are checked against a regular |
100 | expression I<untaint_pattern>. Note, that all names passed to the |
101 | user's I<wanted()> function are still tainted. |
102 | |
103 | =item C<untaint_pattern> |
104 | |
105 | See above. This should be set using the C<qr> quoting operator. |
106 | The default is set to C<qr|^([-+@\w./]+)$|>. |
107 | Note that the paranthesis which are vital. |
108 | |
109 | =item C<untaint_skip> |
110 | |
111 | If set, directories (subtrees) which fail the I<untaint_pattern> |
112 | are skipped. The default is to 'die' in such a case. |
113 | |
114 | =back |
115 | |
116 | The wanted() function does whatever verifications you want. |
117 | C<$File::Find::dir> contains the current directory name, and C<$_> the |
118 | current filename within that directory. C<$File::Find::name> contains |
119 | the complete pathname to the file. You are chdir()'d to C<$File::Find::dir> when |
120 | the function is called, unless C<no_chdir> was specified. |
121 | When <follow> or <follow_fast> are in effect there is also a |
122 | C<$File::Find::fullname>. |
123 | The function may set C<$File::Find::prune> to prune the tree |
124 | unless C<bydepth> was specified. |
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125 | Unless C<follow> or C<follow_fast> is specified, for compatibility |
126 | reasons (find.pl, find2perl) there are in addition the following globals |
127 | available: C<$File::Find::topdir>, C<$File::Find::topdev>, C<$File::Find::topino>, |
128 | C<$File::Find::topmode> and C<$File::Find::topnlink>. |
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129 | |
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130 | This library is useful for the C<find2perl> tool, which when fed, |
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131 | |
132 | find2perl / -name .nfs\* -mtime +7 \ |
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133 | -exec rm -f {} \; -o -fstype nfs -prune |
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134 | |
135 | produces something like: |
136 | |
137 | sub wanted { |
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138 | /^\.nfs.*\z/s && |
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139 | (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_)) && |
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140 | int(-M _) > 7 && |
141 | unlink($_) |
142 | || |
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143 | ($nlink || (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_))) && |
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144 | $dev < 0 && |
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145 | ($File::Find::prune = 1); |
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146 | } |
147 | |
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148 | Set the variable C<$File::Find::dont_use_nlink> if you're using AFS, |
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149 | since AFS cheats. |
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150 | |
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151 | |
152 | Here's another interesting wanted function. It will find all symlinks |
153 | that don't resolve: |
154 | |
155 | sub wanted { |
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156 | -l && !-e && print "bogus link: $File::Find::name\n"; |
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157 | } |
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158 | |
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159 | See also the script C<pfind> on CPAN for a nice application of this |
160 | module. |
161 | |
162 | =head1 CAVEAT |
163 | |
164 | Be aware that the option to follow symblic links can be dangerous. |
165 | Depending on the structure of the directory tree (including symbolic |
166 | links to directories) you might traverse a given (physical) directory |
167 | more than once (only if C<follow_fast> is in effect). |
168 | Furthermore, deleting or changing files in a symbolically linked directory |
169 | might cause very unpleasant surprises, since you delete or change files |
170 | in an unknown directory. |
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171 | |
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172 | |
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173 | =cut |
174 | |
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175 | @ISA = qw(Exporter); |
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176 | @EXPORT = qw(find finddepth); |
177 | |
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178 | |
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179 | use strict; |
180 | my $Is_VMS; |
181 | |
182 | require File::Basename; |
183 | |
184 | my %SLnkSeen; |
185 | my ($wanted_callback, $avoid_nlink, $bydepth, $no_chdir, $follow, |
186 | $follow_skip, $full_check, $untaint, $untaint_skip, $untaint_pat); |
187 | |
188 | sub contract_name { |
189 | my ($cdir,$fn) = @_; |
190 | |
191 | return substr($cdir,0,rindex($cdir,'/')) if $fn eq '.'; |
192 | |
193 | $cdir = substr($cdir,0,rindex($cdir,'/')+1); |
194 | |
195 | $fn =~ s|^\./||; |
196 | |
197 | my $abs_name= $cdir . $fn; |
198 | |
199 | if (substr($fn,0,3) eq '../') { |
200 | do 1 while ($abs_name=~ s|/(?>[^/]+)/\.\./|/|); |
201 | } |
202 | |
203 | return $abs_name; |
204 | } |
205 | |
206 | |
207 | sub PathCombine($$) { |
208 | my ($Base,$Name) = @_; |
209 | my $AbsName; |
210 | |
211 | if (substr($Name,0,1) eq '/') { |
212 | $AbsName= $Name; |
213 | } |
214 | else { |
215 | $AbsName= contract_name($Base,$Name); |
216 | } |
217 | |
218 | # (simple) check for recursion |
219 | my $newlen= length($AbsName); |
220 | if ($newlen <= length($Base)) { |
221 | if (($newlen == length($Base) || substr($Base,$newlen,1) eq '/') |
222 | && $AbsName eq substr($Base,0,$newlen)) |
223 | { |
224 | return undef; |
225 | } |
226 | } |
227 | return $AbsName; |
228 | } |
229 | |
230 | sub Follow_SymLink($) { |
231 | my ($AbsName) = @_; |
232 | |
233 | my ($NewName,$DEV, $INO); |
234 | ($DEV, $INO)= lstat $AbsName; |
235 | |
236 | while (-l _) { |
237 | if ($SLnkSeen{$DEV, $INO}++) { |
238 | if ($follow_skip < 2) { |
239 | die "$AbsName is encountered a second time"; |
a0d0e21e |
240 | } |
241 | else { |
81793b90 |
242 | return undef; |
a0d0e21e |
243 | } |
244 | } |
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245 | $NewName= PathCombine($AbsName, readlink($AbsName)); |
246 | unless(defined $NewName) { |
247 | if ($follow_skip < 2) { |
248 | die "$AbsName is a recursive symbolic link"; |
249 | } |
250 | else { |
251 | return undef; |
a0d0e21e |
252 | } |
81793b90 |
253 | } |
254 | else { |
255 | $AbsName= $NewName; |
256 | } |
257 | ($DEV, $INO) = lstat($AbsName); |
258 | return undef unless defined $DEV; # dangling symbolic link |
259 | } |
260 | |
261 | if ($full_check && $SLnkSeen{$DEV, $INO}++) { |
262 | if ($follow_skip < 1) { |
263 | die "$AbsName encountered a second time"; |
264 | } |
265 | else { |
266 | return undef; |
267 | } |
268 | } |
269 | |
270 | return $AbsName; |
271 | } |
272 | |
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273 | our($dir, $name, $fullname, $prune); |
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274 | sub _find_dir_symlnk($$$); |
275 | sub _find_dir($$$); |
276 | |
277 | sub _find_opt { |
278 | my $wanted = shift; |
279 | die "invalid top directory" unless defined $_[0]; |
280 | |
281 | my $cwd = $wanted->{bydepth} ? Cwd::fastcwd() : Cwd::cwd(); |
282 | my $cwd_untainted = $cwd; |
283 | $wanted_callback = $wanted->{wanted}; |
284 | $bydepth = $wanted->{bydepth}; |
285 | $no_chdir = $wanted->{no_chdir}; |
286 | $full_check = $wanted->{follow}; |
287 | $follow = $full_check || $wanted->{follow_fast}; |
288 | $follow_skip = $wanted->{follow_skip}; |
289 | $untaint = $wanted->{untaint}; |
290 | $untaint_pat = $wanted->{untaint_pattern}; |
291 | $untaint_skip = $wanted->{untaint_skip}; |
292 | |
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293 | # for compatability reasons (find.pl, find2perl) |
294 | our ($topdir, $topdev, $topino, $topmode, $topnlink); |
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295 | |
296 | # a symbolic link to a directory doesn't increase the link count |
297 | $avoid_nlink = $follow || $File::Find::dont_use_nlink; |
298 | |
299 | if ( $untaint ) { |
300 | $cwd_untainted= $1 if $cwd_untainted =~ m|$untaint_pat|; |
301 | die "insecure cwd in find(depth)" unless defined($cwd_untainted); |
302 | } |
303 | |
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304 | my ($abs_dir, $Is_Dir); |
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305 | |
306 | Proc_Top_Item: |
307 | foreach my $TOP (@_) { |
308 | my $top_item = $TOP; |
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309 | $top_item =~ s|/\z|| unless $top_item eq '/'; |
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310 | $Is_Dir= 0; |
311 | |
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312 | ($topdev,$topino,$topmode,$topnlink) = stat $top_item; |
313 | |
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314 | if ($follow) { |
315 | if (substr($top_item,0,1) eq '/') { |
316 | $abs_dir = $top_item; |
317 | } |
318 | elsif ($top_item eq '.') { |
319 | $abs_dir = $cwd; |
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320 | } |
81793b90 |
321 | else { # care about any ../ |
322 | $abs_dir = contract_name("$cwd/",$top_item); |
323 | } |
324 | $abs_dir= Follow_SymLink($abs_dir); |
325 | unless (defined $abs_dir) { |
326 | warn "$top_item is a dangling symbolic link\n"; |
327 | next Proc_Top_Item; |
328 | } |
329 | if (-d _) { |
330 | _find_dir_symlnk($wanted, $abs_dir, $top_item); |
331 | $Is_Dir= 1; |
332 | } |
333 | } |
334 | else { # no follow |
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335 | $topdir = $top_item; |
e7b91b67 |
336 | unless (defined $topnlink) { |
81793b90 |
337 | warn "Can't stat $top_item: $!\n"; |
338 | next Proc_Top_Item; |
339 | } |
340 | if (-d _) { |
c7b9dd21 |
341 | $top_item =~ s/\.dir\z// if $Is_VMS; |
e7b91b67 |
342 | _find_dir($wanted, $top_item, $topnlink); |
81793b90 |
343 | $Is_Dir= 1; |
344 | } |
237437d0 |
345 | else { |
81793b90 |
346 | $abs_dir= $top_item; |
347 | } |
348 | } |
349 | |
350 | unless ($Is_Dir) { |
351 | unless (($_,$dir) = File::Basename::fileparse($abs_dir)) { |
352 | ($dir,$_) = ('.', $top_item); |
353 | } |
354 | |
355 | $abs_dir = $dir; |
356 | if ($untaint) { |
357 | my $abs_dir_save = $abs_dir; |
358 | $abs_dir = $1 if $abs_dir =~ m|$untaint_pat|; |
359 | unless (defined $abs_dir) { |
360 | if ($untaint_skip == 0) { |
361 | die "directory $abs_dir_save is still tainted"; |
362 | } |
363 | else { |
364 | next Proc_Top_Item; |
365 | } |
366 | } |
367 | } |
368 | |
369 | unless ($no_chdir or chdir $abs_dir) { |
370 | warn "Couldn't chdir $abs_dir: $!\n"; |
371 | next Proc_Top_Item; |
372 | } |
373 | |
374 | $name = $abs_dir; |
375 | |
376 | &$wanted_callback; |
377 | |
378 | } |
379 | |
380 | $no_chdir or chdir $cwd_untainted; |
381 | } |
382 | } |
383 | |
384 | # API: |
385 | # $wanted |
386 | # $p_dir : "parent directory" |
387 | # $nlink : what came back from the stat |
388 | # preconditions: |
389 | # chdir (if not no_chdir) to dir |
390 | |
391 | sub _find_dir($$$) { |
392 | my ($wanted, $p_dir, $nlink) = @_; |
393 | my ($CdLvl,$Level) = (0,0); |
394 | my @Stack; |
395 | my @filenames; |
396 | my ($subcount,$sub_nlink); |
397 | my $SE= []; |
398 | my $dir_name= $p_dir; |
07867069 |
399 | my $dir_pref= ( $p_dir eq '/' ? '/' : "$p_dir/" ); |
81793b90 |
400 | my $dir_rel= '.'; # directory name relative to current directory |
401 | |
402 | local ($dir, $name, $prune, *DIR); |
403 | |
404 | unless ($no_chdir or $p_dir eq '.') { |
405 | my $udir = $p_dir; |
406 | if ($untaint) { |
407 | $udir = $1 if $p_dir =~ m|$untaint_pat|; |
408 | unless (defined $udir) { |
409 | if ($untaint_skip == 0) { |
410 | die "directory $p_dir is still tainted"; |
411 | } |
412 | else { |
413 | return; |
414 | } |
237437d0 |
415 | } |
a0d0e21e |
416 | } |
81793b90 |
417 | unless (chdir $udir) { |
418 | warn "Can't cd to $udir: $!\n"; |
419 | return; |
420 | } |
421 | } |
57e73c4b |
422 | |
423 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; |
81793b90 |
424 | |
425 | while (defined $SE) { |
426 | unless ($bydepth) { |
427 | $dir= $p_dir; |
428 | $name= $dir_name; |
429 | $_= ($no_chdir ? $dir_name : $dir_rel ); |
430 | # prune may happen here |
431 | $prune= 0; |
432 | &$wanted_callback; |
433 | next if $prune; |
434 | } |
435 | |
436 | # change to that directory |
437 | unless ($no_chdir or $dir_rel eq '.') { |
438 | my $udir= $dir_rel; |
439 | if ($untaint) { |
440 | $udir = $1 if $dir_rel =~ m|$untaint_pat|; |
441 | unless (defined $udir) { |
442 | if ($untaint_skip == 0) { |
07867069 |
443 | die "directory (" |
444 | . ($p_dir ne '/' ? $p_dir : '') |
445 | . "/) $dir_rel is still tainted"; |
81793b90 |
446 | } |
447 | } |
448 | } |
449 | unless (chdir $udir) { |
07867069 |
450 | warn "Can't cd to (" |
451 | . ($p_dir ne '/' ? $p_dir : '') |
452 | . "/) $udir : $!\n"; |
81793b90 |
453 | next; |
454 | } |
455 | $CdLvl++; |
456 | } |
457 | |
458 | $dir= $dir_name; |
459 | |
460 | # Get the list of files in the current directory. |
461 | unless (opendir DIR, ($no_chdir ? $dir_name : '.')) { |
462 | warn "Can't opendir($dir_name): $!\n"; |
463 | next; |
464 | } |
465 | @filenames = readdir DIR; |
466 | closedir(DIR); |
467 | |
468 | if ($nlink == 2 && !$avoid_nlink) { |
469 | # This dir has no subdirectories. |
470 | for my $FN (@filenames) { |
c7b9dd21 |
471 | next if $FN =~ /^\.{1,2}\z/; |
81793b90 |
472 | |
07867069 |
473 | $name = $dir_pref . $FN; |
81793b90 |
474 | $_ = ($no_chdir ? $name : $FN); |
475 | &$wanted_callback; |
476 | } |
477 | |
478 | } |
479 | else { |
480 | # This dir has subdirectories. |
481 | $subcount = $nlink - 2; |
482 | |
483 | for my $FN (@filenames) { |
c7b9dd21 |
484 | next if $FN =~ /^\.{1,2}\z/; |
81793b90 |
485 | if ($subcount > 0 || $avoid_nlink) { |
486 | # Seen all the subdirs? |
487 | # check for directoriness. |
488 | # stat is faster for a file in the current directory |
07867069 |
489 | $sub_nlink = (lstat ($no_chdir ? $dir_pref . $FN : $FN))[3]; |
81793b90 |
490 | |
491 | if (-d _) { |
492 | --$subcount; |
c7b9dd21 |
493 | $FN =~ s/\.dir\z// if $Is_VMS; |
81793b90 |
494 | push @Stack,[$CdLvl,$dir_name,$FN,$sub_nlink]; |
495 | } |
496 | else { |
07867069 |
497 | $name = $dir_pref . $FN; |
81793b90 |
498 | $_= ($no_chdir ? $name : $FN); |
499 | &$wanted_callback; |
500 | } |
501 | } |
07867069 |
502 | else { |
503 | $name = $dir_pref . $FN; |
81793b90 |
504 | $_= ($no_chdir ? $name : $FN); |
505 | &$wanted_callback; |
506 | } |
507 | } |
508 | } |
17b275ff |
509 | } |
510 | continue { |
57e73c4b |
511 | while ( defined ($SE = pop @Stack) ) { |
81793b90 |
512 | ($Level, $p_dir, $dir_rel, $nlink) = @$SE; |
513 | if ($CdLvl > $Level && !$no_chdir) { |
f0963acb |
514 | my $tmp = join('/',('..') x ($CdLvl-$Level)); |
515 | die "Can't cd to $dir_name" . $tmp |
516 | unless chdir ($tmp); |
81793b90 |
517 | $CdLvl = $Level; |
518 | } |
07867069 |
519 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); |
520 | $dir_pref = "$dir_name/"; |
57e73c4b |
521 | if ( $nlink < 0 ) { # must be finddepth, report dirname now |
522 | $name = $dir_name; |
57907763 |
523 | if ( substr($name,-2) eq '/.' ) { |
524 | $name =~ s|/\.$||; |
525 | } |
57e73c4b |
526 | $dir = $p_dir; |
527 | $_ = ($no_chdir ? $dir_name : $dir_rel ); |
57907763 |
528 | if ( substr($_,-2) eq '/.' ) { |
529 | s|/\.$||; |
530 | } |
57e73c4b |
531 | &$wanted_callback; |
532 | } else { |
533 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; |
534 | last; |
535 | } |
81793b90 |
536 | } |
a0d0e21e |
537 | } |
538 | } |
539 | |
81793b90 |
540 | |
541 | # API: |
542 | # $wanted |
543 | # $dir_loc : absolute location of a dir |
544 | # $p_dir : "parent directory" |
545 | # preconditions: |
546 | # chdir (if not no_chdir) to dir |
547 | |
548 | sub _find_dir_symlnk($$$) { |
549 | my ($wanted, $dir_loc, $p_dir) = @_; |
550 | my @Stack; |
551 | my @filenames; |
552 | my $new_loc; |
57e73c4b |
553 | my $pdir_loc = $dir_loc; |
81793b90 |
554 | my $SE = []; |
555 | my $dir_name = $p_dir; |
07867069 |
556 | my $dir_pref = ( $p_dir eq '/' ? '/' : "$p_dir/" ); |
557 | my $loc_pref = ( $dir_loc eq '/' ? '/' : "$dir_loc/" ); |
81793b90 |
558 | my $dir_rel = '.'; # directory name relative to current directory |
57e73c4b |
559 | my $byd_flag; # flag for pending stack entry if $bydepth |
81793b90 |
560 | |
561 | local ($dir, $name, $fullname, $prune, *DIR); |
562 | |
563 | unless ($no_chdir or $p_dir eq '.') { |
564 | my $udir = $dir_loc; |
565 | if ($untaint) { |
566 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
567 | unless (defined $udir) { |
568 | if ($untaint_skip == 0) { |
569 | die "directory $dir_loc is still tainted"; |
570 | } |
571 | else { |
572 | return; |
573 | } |
574 | } |
575 | } |
576 | unless (chdir $udir) { |
577 | warn "Can't cd to $udir: $!\n"; |
578 | return; |
579 | } |
580 | } |
581 | |
57e73c4b |
582 | push @Stack,[$dir_loc,$pdir_loc,$p_dir,$dir_rel,-1] if $bydepth; |
583 | |
81793b90 |
584 | while (defined $SE) { |
585 | |
586 | unless ($bydepth) { |
587 | $dir= $p_dir; |
588 | $name= $dir_name; |
589 | $_= ($no_chdir ? $dir_name : $dir_rel ); |
590 | $fullname= $dir_loc; |
591 | # prune may happen here |
592 | $prune= 0; |
593 | &$wanted_callback; |
594 | next if $prune; |
595 | } |
596 | |
597 | # change to that directory |
598 | unless ($no_chdir or $dir_rel eq '.') { |
599 | my $udir = $dir_loc; |
600 | if ($untaint) { |
601 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
602 | unless (defined $udir ) { |
603 | if ($untaint_skip == 0) { |
604 | die "directory $dir_loc is still tainted"; |
a0d0e21e |
605 | } |
237437d0 |
606 | else { |
81793b90 |
607 | next; |
237437d0 |
608 | } |
a0d0e21e |
609 | } |
610 | } |
81793b90 |
611 | unless (chdir $udir) { |
612 | warn "Can't cd to $udir: $!\n"; |
613 | next; |
614 | } |
615 | } |
616 | |
617 | $dir = $dir_name; |
618 | |
619 | # Get the list of files in the current directory. |
620 | unless (opendir DIR, ($no_chdir ? $dir_loc : '.')) { |
621 | warn "Can't opendir($dir_loc): $!\n"; |
622 | next; |
623 | } |
624 | @filenames = readdir DIR; |
625 | closedir(DIR); |
626 | |
627 | for my $FN (@filenames) { |
c7b9dd21 |
628 | next if $FN =~ /^\.{1,2}\z/; |
81793b90 |
629 | |
630 | # follow symbolic links / do an lstat |
07867069 |
631 | $new_loc = Follow_SymLink($loc_pref.$FN); |
81793b90 |
632 | |
633 | # ignore if invalid symlink |
634 | next unless defined $new_loc; |
635 | |
636 | if (-d _) { |
57e73c4b |
637 | push @Stack,[$new_loc,$dir_loc,$dir_name,$FN,1]; |
81793b90 |
638 | } |
639 | else { |
640 | $fullname = $new_loc; |
07867069 |
641 | $name = $dir_pref . $FN; |
81793b90 |
642 | $_ = ($no_chdir ? $name : $FN); |
643 | &$wanted_callback; |
644 | } |
645 | } |
646 | |
81793b90 |
647 | } |
648 | continue { |
57e73c4b |
649 | while (defined($SE = pop @Stack)) { |
650 | ($dir_loc, $pdir_loc, $p_dir, $dir_rel, $byd_flag) = @$SE; |
07867069 |
651 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); |
652 | $dir_pref = "$dir_name/"; |
653 | $loc_pref = "$dir_loc/"; |
57e73c4b |
654 | if ( $byd_flag < 0 ) { # must be finddepth, report dirname now |
655 | unless ($no_chdir or $dir_rel eq '.') { |
656 | my $udir = $pdir_loc; |
657 | if ($untaint) { |
658 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
659 | } |
660 | unless (chdir $udir) { |
661 | warn "Can't cd to $udir: $!\n"; |
662 | next; |
663 | } |
664 | } |
665 | $fullname = $dir_loc; |
666 | $name = $dir_name; |
57907763 |
667 | if ( substr($name,-2) eq '/.' ) { |
668 | $name =~ s|/\.$||; |
669 | } |
57e73c4b |
670 | $dir = $p_dir; |
671 | $_ = ($no_chdir ? $dir_name : $dir_rel); |
57907763 |
672 | if ( substr($_,-2) eq '/.' ) { |
673 | s|/\.$||; |
674 | } |
675 | |
57e73c4b |
676 | &$wanted_callback; |
677 | } else { |
678 | push @Stack,[$dir_loc, $pdir_loc, $p_dir, $dir_rel,-1] if $bydepth; |
679 | last; |
680 | } |
a0d0e21e |
681 | } |
682 | } |
683 | } |
684 | |
81793b90 |
685 | |
20408e3c |
686 | sub wrap_wanted { |
81793b90 |
687 | my $wanted = shift; |
688 | if ( ref($wanted) eq 'HASH' ) { |
689 | if ( $wanted->{follow} || $wanted->{follow_fast}) { |
690 | $wanted->{follow_skip} = 1 unless defined $wanted->{follow_skip}; |
691 | } |
692 | if ( $wanted->{untaint} ) { |
693 | $wanted->{untaint_pattern} = qr|^([-+@\w./]+)$| |
694 | unless defined $wanted->{untaint_pattern}; |
695 | $wanted->{untaint_skip} = 0 unless defined $wanted->{untaint_skip}; |
696 | } |
697 | return $wanted; |
698 | } |
699 | else { |
700 | return { wanted => $wanted }; |
701 | } |
a0d0e21e |
702 | } |
703 | |
20408e3c |
704 | sub find { |
81793b90 |
705 | my $wanted = shift; |
706 | _find_opt(wrap_wanted($wanted), @_); |
707 | %SLnkSeen= (); # free memory |
a0d0e21e |
708 | } |
709 | |
55d729e4 |
710 | sub finddepth { |
81793b90 |
711 | my $wanted = wrap_wanted(shift); |
712 | $wanted->{bydepth} = 1; |
713 | _find_opt($wanted, @_); |
714 | %SLnkSeen= (); # free memory |
20408e3c |
715 | } |
6280b799 |
716 | |
717 | # These are hard-coded for now, but may move to hint files. |
10eba763 |
718 | if ($^O eq 'VMS') { |
81793b90 |
719 | $Is_VMS = 1; |
720 | $File::Find::dont_use_nlink = 1; |
748a9306 |
721 | } |
722 | |
81793b90 |
723 | $File::Find::dont_use_nlink = 1 |
3e8584ad |
724 | if $^O eq 'os2' || $^O eq 'dos' || $^O eq 'amigaos' || $^O eq 'MSWin32'; |
6280b799 |
725 | |
20408e3c |
726 | # Set dont_use_nlink in your hint file if your system's stat doesn't |
727 | # report the number of links in a directory as an indication |
728 | # of the number of files. |
729 | # See, e.g. hints/machten.sh for MachTen 2.2. |
81793b90 |
730 | unless ($File::Find::dont_use_nlink) { |
731 | require Config; |
732 | $File::Find::dont_use_nlink = 1 if ($Config::Config{'dont_use_nlink'}); |
20408e3c |
733 | } |
734 | |
a0d0e21e |
735 | 1; |