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1 | package File::Find; |
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2 | use strict; |
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3 | use warnings; |
4 | use 5.6.0; |
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5 | our $VERSION = '1.00'; |
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6 | require Exporter; |
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7 | require Cwd; |
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8 | |
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9 | =head1 NAME |
10 | |
11 | find - traverse a file tree |
12 | |
13 | finddepth - traverse a directory structure depth-first |
14 | |
15 | =head1 SYNOPSIS |
16 | |
17 | use File::Find; |
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18 | find(\&wanted, '/foo', '/bar'); |
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19 | sub wanted { ... } |
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20 | |
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21 | use File::Find; |
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22 | finddepth(\&wanted, '/foo', '/bar'); |
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23 | sub wanted { ... } |
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24 | |
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25 | use File::Find; |
26 | find({ wanted => \&process, follow => 1 }, '.'); |
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27 | |
28 | =head1 DESCRIPTION |
29 | |
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30 | The first argument to find() is either a hash reference describing the |
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31 | operations to be performed for each file, or a code reference. |
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32 | |
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33 | Here are the possible keys for the hash: |
34 | |
35 | =over 3 |
36 | |
37 | =item C<wanted> |
38 | |
39 | The value should be a code reference. This code reference is called |
40 | I<the wanted() function> below. |
41 | |
42 | =item C<bydepth> |
43 | |
44 | Reports the name of a directory only AFTER all its entries |
45 | have been reported. Entry point finddepth() is a shortcut for |
46 | specifying C<{ bydepth => 1 }> in the first argument of find(). |
47 | |
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48 | =item C<preprocess> |
49 | |
50 | The value should be a code reference. This code reference is used to |
51 | preprocess a directory; it is called after readdir() but before the loop that |
52 | calls the wanted() function. It is called with a list of strings and is |
53 | expected to return a list of strings. The code can be used to sort the |
54 | strings alphabetically, numerically, or to filter out directory entries based |
55 | on their name alone. |
56 | |
57 | =item C<postprocess> |
58 | |
59 | The value should be a code reference. It is invoked just before leaving the |
60 | current directory. It is called in void context with no arguments. The name |
61 | of the current directory is in $File::Find::dir. This hook is handy for |
62 | summarizing a directory, such as calculating its disk usage. |
63 | |
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64 | =item C<follow> |
65 | |
66 | Causes symbolic links to be followed. Since directory trees with symbolic |
67 | links (followed) may contain files more than once and may even have |
68 | cycles, a hash has to be built up with an entry for each file. |
69 | This might be expensive both in space and time for a large |
70 | directory tree. See I<follow_fast> and I<follow_skip> below. |
71 | If either I<follow> or I<follow_fast> is in effect: |
72 | |
73 | =over 6 |
74 | |
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75 | =item * |
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76 | |
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77 | It is guaranteed that an I<lstat> has been called before the user's |
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78 | I<wanted()> function is called. This enables fast file checks involving S< _>. |
79 | |
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80 | =item * |
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81 | |
82 | There is a variable C<$File::Find::fullname> which holds the absolute |
83 | pathname of the file with all symbolic links resolved |
84 | |
85 | =back |
86 | |
87 | =item C<follow_fast> |
88 | |
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89 | This is similar to I<follow> except that it may report some files more |
90 | than once. It does detect cycles, however. Since only symbolic links |
91 | have to be hashed, this is much cheaper both in space and time. If |
92 | processing a file more than once (by the user's I<wanted()> function) |
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93 | is worse than just taking time, the option I<follow> should be used. |
94 | |
95 | =item C<follow_skip> |
96 | |
97 | C<follow_skip==1>, which is the default, causes all files which are |
98 | neither directories nor symbolic links to be ignored if they are about |
99 | to be processed a second time. If a directory or a symbolic link |
100 | are about to be processed a second time, File::Find dies. |
101 | C<follow_skip==0> causes File::Find to die if any file is about to be |
102 | processed a second time. |
103 | C<follow_skip==2> causes File::Find to ignore any duplicate files and |
104 | dirctories but to proceed normally otherwise. |
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105 | |
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106 | |
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107 | =item C<no_chdir> |
108 | |
109 | Does not C<chdir()> to each directory as it recurses. The wanted() |
110 | function will need to be aware of this, of course. In this case, |
111 | C<$_> will be the same as C<$File::Find::name>. |
112 | |
113 | =item C<untaint> |
114 | |
115 | If find is used in taint-mode (-T command line switch or if EUID != UID |
116 | or if EGID != GID) then internally directory names have to be untainted |
117 | before they can be cd'ed to. Therefore they are checked against a regular |
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118 | expression I<untaint_pattern>. Note that all names passed to the |
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119 | user's I<wanted()> function are still tainted. |
120 | |
121 | =item C<untaint_pattern> |
122 | |
123 | See above. This should be set using the C<qr> quoting operator. |
124 | The default is set to C<qr|^([-+@\w./]+)$|>. |
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125 | Note that the parantheses are vital. |
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126 | |
127 | =item C<untaint_skip> |
128 | |
129 | If set, directories (subtrees) which fail the I<untaint_pattern> |
130 | are skipped. The default is to 'die' in such a case. |
131 | |
132 | =back |
133 | |
134 | The wanted() function does whatever verifications you want. |
135 | C<$File::Find::dir> contains the current directory name, and C<$_> the |
136 | current filename within that directory. C<$File::Find::name> contains |
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137 | the complete pathname to the file. You are chdir()'d to |
138 | C<$File::Find::dir> when the function is called, unless C<no_chdir> |
139 | was specified. When <follow> or <follow_fast> are in effect, there is |
140 | also a C<$File::Find::fullname>. The function may set |
141 | C<$File::Find::prune> to prune the tree unless C<bydepth> was |
142 | specified. Unless C<follow> or C<follow_fast> is specified, for |
143 | compatibility reasons (find.pl, find2perl) there are in addition the |
144 | following globals available: C<$File::Find::topdir>, |
145 | C<$File::Find::topdev>, C<$File::Find::topino>, |
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146 | C<$File::Find::topmode> and C<$File::Find::topnlink>. |
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147 | |
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148 | This library is useful for the C<find2perl> tool, which when fed, |
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149 | |
150 | find2perl / -name .nfs\* -mtime +7 \ |
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151 | -exec rm -f {} \; -o -fstype nfs -prune |
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152 | |
153 | produces something like: |
154 | |
155 | sub wanted { |
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156 | /^\.nfs.*\z/s && |
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157 | (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_)) && |
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158 | int(-M _) > 7 && |
159 | unlink($_) |
160 | || |
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161 | ($nlink || (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_))) && |
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162 | $dev < 0 && |
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163 | ($File::Find::prune = 1); |
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164 | } |
165 | |
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166 | Set the variable C<$File::Find::dont_use_nlink> if you're using AFS, |
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167 | since AFS cheats. |
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168 | |
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169 | |
170 | Here's another interesting wanted function. It will find all symlinks |
171 | that don't resolve: |
172 | |
173 | sub wanted { |
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174 | -l && !-e && print "bogus link: $File::Find::name\n"; |
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175 | } |
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176 | |
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177 | See also the script C<pfind> on CPAN for a nice application of this |
178 | module. |
179 | |
180 | =head1 CAVEAT |
181 | |
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182 | Be aware that the option to follow symbolic links can be dangerous. |
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183 | Depending on the structure of the directory tree (including symbolic |
184 | links to directories) you might traverse a given (physical) directory |
185 | more than once (only if C<follow_fast> is in effect). |
186 | Furthermore, deleting or changing files in a symbolically linked directory |
187 | might cause very unpleasant surprises, since you delete or change files |
188 | in an unknown directory. |
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189 | |
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190 | |
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191 | =cut |
192 | |
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193 | our @ISA = qw(Exporter); |
194 | our @EXPORT = qw(find finddepth); |
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195 | |
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196 | |
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197 | use strict; |
198 | my $Is_VMS; |
199 | |
200 | require File::Basename; |
201 | |
202 | my %SLnkSeen; |
203 | my ($wanted_callback, $avoid_nlink, $bydepth, $no_chdir, $follow, |
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204 | $follow_skip, $full_check, $untaint, $untaint_skip, $untaint_pat, |
205 | $pre_process, $post_process); |
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206 | |
207 | sub contract_name { |
208 | my ($cdir,$fn) = @_; |
209 | |
210 | return substr($cdir,0,rindex($cdir,'/')) if $fn eq '.'; |
211 | |
212 | $cdir = substr($cdir,0,rindex($cdir,'/')+1); |
213 | |
214 | $fn =~ s|^\./||; |
215 | |
216 | my $abs_name= $cdir . $fn; |
217 | |
218 | if (substr($fn,0,3) eq '../') { |
fecbda2b |
219 | 1 while $abs_name =~ s!/[^/]*/\.\./!/!; |
81793b90 |
220 | } |
221 | |
222 | return $abs_name; |
223 | } |
224 | |
225 | |
226 | sub PathCombine($$) { |
227 | my ($Base,$Name) = @_; |
228 | my $AbsName; |
229 | |
230 | if (substr($Name,0,1) eq '/') { |
231 | $AbsName= $Name; |
232 | } |
233 | else { |
234 | $AbsName= contract_name($Base,$Name); |
235 | } |
236 | |
237 | # (simple) check for recursion |
238 | my $newlen= length($AbsName); |
239 | if ($newlen <= length($Base)) { |
240 | if (($newlen == length($Base) || substr($Base,$newlen,1) eq '/') |
241 | && $AbsName eq substr($Base,0,$newlen)) |
242 | { |
243 | return undef; |
244 | } |
245 | } |
246 | return $AbsName; |
247 | } |
248 | |
249 | sub Follow_SymLink($) { |
250 | my ($AbsName) = @_; |
251 | |
252 | my ($NewName,$DEV, $INO); |
253 | ($DEV, $INO)= lstat $AbsName; |
254 | |
255 | while (-l _) { |
256 | if ($SLnkSeen{$DEV, $INO}++) { |
257 | if ($follow_skip < 2) { |
258 | die "$AbsName is encountered a second time"; |
a0d0e21e |
259 | } |
260 | else { |
81793b90 |
261 | return undef; |
a0d0e21e |
262 | } |
263 | } |
81793b90 |
264 | $NewName= PathCombine($AbsName, readlink($AbsName)); |
265 | unless(defined $NewName) { |
266 | if ($follow_skip < 2) { |
267 | die "$AbsName is a recursive symbolic link"; |
268 | } |
269 | else { |
270 | return undef; |
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271 | } |
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272 | } |
273 | else { |
274 | $AbsName= $NewName; |
275 | } |
276 | ($DEV, $INO) = lstat($AbsName); |
277 | return undef unless defined $DEV; # dangling symbolic link |
278 | } |
279 | |
280 | if ($full_check && $SLnkSeen{$DEV, $INO}++) { |
281 | if ($follow_skip < 1) { |
282 | die "$AbsName encountered a second time"; |
283 | } |
284 | else { |
285 | return undef; |
286 | } |
287 | } |
288 | |
289 | return $AbsName; |
290 | } |
291 | |
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292 | our($dir, $name, $fullname, $prune); |
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293 | sub _find_dir_symlnk($$$); |
294 | sub _find_dir($$$); |
295 | |
296 | sub _find_opt { |
297 | my $wanted = shift; |
298 | die "invalid top directory" unless defined $_[0]; |
299 | |
300 | my $cwd = $wanted->{bydepth} ? Cwd::fastcwd() : Cwd::cwd(); |
301 | my $cwd_untainted = $cwd; |
302 | $wanted_callback = $wanted->{wanted}; |
303 | $bydepth = $wanted->{bydepth}; |
719c805e |
304 | $pre_process = $wanted->{preprocess}; |
305 | $post_process = $wanted->{postprocess}; |
81793b90 |
306 | $no_chdir = $wanted->{no_chdir}; |
307 | $full_check = $wanted->{follow}; |
308 | $follow = $full_check || $wanted->{follow_fast}; |
309 | $follow_skip = $wanted->{follow_skip}; |
310 | $untaint = $wanted->{untaint}; |
311 | $untaint_pat = $wanted->{untaint_pattern}; |
312 | $untaint_skip = $wanted->{untaint_skip}; |
313 | |
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314 | # for compatability reasons (find.pl, find2perl) |
315 | our ($topdir, $topdev, $topino, $topmode, $topnlink); |
81793b90 |
316 | |
317 | # a symbolic link to a directory doesn't increase the link count |
318 | $avoid_nlink = $follow || $File::Find::dont_use_nlink; |
319 | |
320 | if ( $untaint ) { |
321 | $cwd_untainted= $1 if $cwd_untainted =~ m|$untaint_pat|; |
322 | die "insecure cwd in find(depth)" unless defined($cwd_untainted); |
323 | } |
324 | |
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325 | my ($abs_dir, $Is_Dir); |
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326 | |
327 | Proc_Top_Item: |
328 | foreach my $TOP (@_) { |
329 | my $top_item = $TOP; |
c7b9dd21 |
330 | $top_item =~ s|/\z|| unless $top_item eq '/'; |
81793b90 |
331 | $Is_Dir= 0; |
332 | |
333 | if ($follow) { |
0c1c71f2 |
334 | ($topdev,$topino,$topmode,$topnlink) = stat $top_item; |
81793b90 |
335 | if (substr($top_item,0,1) eq '/') { |
336 | $abs_dir = $top_item; |
337 | } |
338 | elsif ($top_item eq '.') { |
339 | $abs_dir = $cwd; |
237437d0 |
340 | } |
81793b90 |
341 | else { # care about any ../ |
342 | $abs_dir = contract_name("$cwd/",$top_item); |
343 | } |
344 | $abs_dir= Follow_SymLink($abs_dir); |
345 | unless (defined $abs_dir) { |
346 | warn "$top_item is a dangling symbolic link\n"; |
347 | next Proc_Top_Item; |
348 | } |
349 | if (-d _) { |
350 | _find_dir_symlnk($wanted, $abs_dir, $top_item); |
351 | $Is_Dir= 1; |
352 | } |
353 | } |
354 | else { # no follow |
0c1c71f2 |
355 | ($topdev,$topino,$topmode,$topnlink) = lstat $top_item; |
e7b91b67 |
356 | $topdir = $top_item; |
e7b91b67 |
357 | unless (defined $topnlink) { |
81793b90 |
358 | warn "Can't stat $top_item: $!\n"; |
359 | next Proc_Top_Item; |
360 | } |
361 | if (-d _) { |
c7b9dd21 |
362 | $top_item =~ s/\.dir\z// if $Is_VMS; |
e7b91b67 |
363 | _find_dir($wanted, $top_item, $topnlink); |
81793b90 |
364 | $Is_Dir= 1; |
365 | } |
237437d0 |
366 | else { |
81793b90 |
367 | $abs_dir= $top_item; |
368 | } |
369 | } |
370 | |
371 | unless ($Is_Dir) { |
372 | unless (($_,$dir) = File::Basename::fileparse($abs_dir)) { |
719911cc |
373 | ($dir,$_) = ('./', $top_item); |
81793b90 |
374 | } |
375 | |
376 | $abs_dir = $dir; |
377 | if ($untaint) { |
378 | my $abs_dir_save = $abs_dir; |
379 | $abs_dir = $1 if $abs_dir =~ m|$untaint_pat|; |
380 | unless (defined $abs_dir) { |
381 | if ($untaint_skip == 0) { |
382 | die "directory $abs_dir_save is still tainted"; |
383 | } |
384 | else { |
385 | next Proc_Top_Item; |
386 | } |
387 | } |
388 | } |
389 | |
390 | unless ($no_chdir or chdir $abs_dir) { |
391 | warn "Couldn't chdir $abs_dir: $!\n"; |
392 | next Proc_Top_Item; |
393 | } |
719911cc |
394 | |
395 | $name = $abs_dir . $_; |
396 | |
73396e07 |
397 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
398 | |
399 | } |
400 | |
401 | $no_chdir or chdir $cwd_untainted; |
402 | } |
403 | } |
404 | |
405 | # API: |
406 | # $wanted |
407 | # $p_dir : "parent directory" |
408 | # $nlink : what came back from the stat |
409 | # preconditions: |
410 | # chdir (if not no_chdir) to dir |
411 | |
412 | sub _find_dir($$$) { |
413 | my ($wanted, $p_dir, $nlink) = @_; |
414 | my ($CdLvl,$Level) = (0,0); |
415 | my @Stack; |
416 | my @filenames; |
417 | my ($subcount,$sub_nlink); |
418 | my $SE= []; |
419 | my $dir_name= $p_dir; |
07867069 |
420 | my $dir_pref= ( $p_dir eq '/' ? '/' : "$p_dir/" ); |
81793b90 |
421 | my $dir_rel= '.'; # directory name relative to current directory |
422 | |
423 | local ($dir, $name, $prune, *DIR); |
424 | |
425 | unless ($no_chdir or $p_dir eq '.') { |
426 | my $udir = $p_dir; |
427 | if ($untaint) { |
428 | $udir = $1 if $p_dir =~ m|$untaint_pat|; |
429 | unless (defined $udir) { |
430 | if ($untaint_skip == 0) { |
431 | die "directory $p_dir is still tainted"; |
432 | } |
433 | else { |
434 | return; |
435 | } |
237437d0 |
436 | } |
a0d0e21e |
437 | } |
81793b90 |
438 | unless (chdir $udir) { |
439 | warn "Can't cd to $udir: $!\n"; |
440 | return; |
441 | } |
442 | } |
57e73c4b |
443 | |
444 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; |
81793b90 |
445 | |
446 | while (defined $SE) { |
447 | unless ($bydepth) { |
448 | $dir= $p_dir; |
449 | $name= $dir_name; |
450 | $_= ($no_chdir ? $dir_name : $dir_rel ); |
451 | # prune may happen here |
452 | $prune= 0; |
73396e07 |
453 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
454 | next if $prune; |
455 | } |
456 | |
457 | # change to that directory |
458 | unless ($no_chdir or $dir_rel eq '.') { |
459 | my $udir= $dir_rel; |
460 | if ($untaint) { |
461 | $udir = $1 if $dir_rel =~ m|$untaint_pat|; |
462 | unless (defined $udir) { |
463 | if ($untaint_skip == 0) { |
07867069 |
464 | die "directory (" |
465 | . ($p_dir ne '/' ? $p_dir : '') |
466 | . "/) $dir_rel is still tainted"; |
81793b90 |
467 | } |
468 | } |
469 | } |
470 | unless (chdir $udir) { |
07867069 |
471 | warn "Can't cd to (" |
472 | . ($p_dir ne '/' ? $p_dir : '') |
473 | . "/) $udir : $!\n"; |
81793b90 |
474 | next; |
475 | } |
476 | $CdLvl++; |
477 | } |
478 | |
479 | $dir= $dir_name; |
480 | |
481 | # Get the list of files in the current directory. |
482 | unless (opendir DIR, ($no_chdir ? $dir_name : '.')) { |
483 | warn "Can't opendir($dir_name): $!\n"; |
484 | next; |
485 | } |
486 | @filenames = readdir DIR; |
487 | closedir(DIR); |
719c805e |
488 | @filenames = &$pre_process(@filenames) if $pre_process; |
489 | push @Stack,[$CdLvl,$dir_name,"",-2] if $post_process; |
81793b90 |
490 | |
491 | if ($nlink == 2 && !$avoid_nlink) { |
492 | # This dir has no subdirectories. |
493 | for my $FN (@filenames) { |
c7b9dd21 |
494 | next if $FN =~ /^\.{1,2}\z/; |
81793b90 |
495 | |
07867069 |
496 | $name = $dir_pref . $FN; |
81793b90 |
497 | $_ = ($no_chdir ? $name : $FN); |
73396e07 |
498 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
499 | } |
500 | |
501 | } |
502 | else { |
503 | # This dir has subdirectories. |
504 | $subcount = $nlink - 2; |
505 | |
506 | for my $FN (@filenames) { |
c7b9dd21 |
507 | next if $FN =~ /^\.{1,2}\z/; |
81793b90 |
508 | if ($subcount > 0 || $avoid_nlink) { |
509 | # Seen all the subdirs? |
510 | # check for directoriness. |
511 | # stat is faster for a file in the current directory |
07867069 |
512 | $sub_nlink = (lstat ($no_chdir ? $dir_pref . $FN : $FN))[3]; |
81793b90 |
513 | |
514 | if (-d _) { |
515 | --$subcount; |
c7b9dd21 |
516 | $FN =~ s/\.dir\z// if $Is_VMS; |
81793b90 |
517 | push @Stack,[$CdLvl,$dir_name,$FN,$sub_nlink]; |
518 | } |
519 | else { |
07867069 |
520 | $name = $dir_pref . $FN; |
81793b90 |
521 | $_= ($no_chdir ? $name : $FN); |
73396e07 |
522 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
523 | } |
524 | } |
07867069 |
525 | else { |
526 | $name = $dir_pref . $FN; |
81793b90 |
527 | $_= ($no_chdir ? $name : $FN); |
73396e07 |
528 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
529 | } |
530 | } |
531 | } |
17b275ff |
532 | } |
533 | continue { |
57e73c4b |
534 | while ( defined ($SE = pop @Stack) ) { |
81793b90 |
535 | ($Level, $p_dir, $dir_rel, $nlink) = @$SE; |
536 | if ($CdLvl > $Level && !$no_chdir) { |
f0963acb |
537 | my $tmp = join('/',('..') x ($CdLvl-$Level)); |
538 | die "Can't cd to $dir_name" . $tmp |
539 | unless chdir ($tmp); |
81793b90 |
540 | $CdLvl = $Level; |
541 | } |
07867069 |
542 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); |
543 | $dir_pref = "$dir_name/"; |
719c805e |
544 | if ( $nlink == -2 ) { |
545 | $name = $dir = $p_dir; |
546 | $_ = "."; |
547 | &$post_process; # End-of-directory processing |
548 | } elsif ( $nlink < 0 ) { # must be finddepth, report dirname now |
57e73c4b |
549 | $name = $dir_name; |
57907763 |
550 | if ( substr($name,-2) eq '/.' ) { |
551 | $name =~ s|/\.$||; |
552 | } |
57e73c4b |
553 | $dir = $p_dir; |
554 | $_ = ($no_chdir ? $dir_name : $dir_rel ); |
57907763 |
555 | if ( substr($_,-2) eq '/.' ) { |
556 | s|/\.$||; |
557 | } |
73396e07 |
558 | { &$wanted_callback }; # protect against wild "next" |
57e73c4b |
559 | } else { |
560 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; |
561 | last; |
562 | } |
81793b90 |
563 | } |
a0d0e21e |
564 | } |
565 | } |
566 | |
81793b90 |
567 | |
568 | # API: |
569 | # $wanted |
570 | # $dir_loc : absolute location of a dir |
571 | # $p_dir : "parent directory" |
572 | # preconditions: |
573 | # chdir (if not no_chdir) to dir |
574 | |
575 | sub _find_dir_symlnk($$$) { |
576 | my ($wanted, $dir_loc, $p_dir) = @_; |
577 | my @Stack; |
578 | my @filenames; |
579 | my $new_loc; |
57e73c4b |
580 | my $pdir_loc = $dir_loc; |
81793b90 |
581 | my $SE = []; |
582 | my $dir_name = $p_dir; |
07867069 |
583 | my $dir_pref = ( $p_dir eq '/' ? '/' : "$p_dir/" ); |
584 | my $loc_pref = ( $dir_loc eq '/' ? '/' : "$dir_loc/" ); |
81793b90 |
585 | my $dir_rel = '.'; # directory name relative to current directory |
57e73c4b |
586 | my $byd_flag; # flag for pending stack entry if $bydepth |
81793b90 |
587 | |
588 | local ($dir, $name, $fullname, $prune, *DIR); |
589 | |
590 | unless ($no_chdir or $p_dir eq '.') { |
591 | my $udir = $dir_loc; |
592 | if ($untaint) { |
593 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
594 | unless (defined $udir) { |
595 | if ($untaint_skip == 0) { |
596 | die "directory $dir_loc is still tainted"; |
597 | } |
598 | else { |
599 | return; |
600 | } |
601 | } |
602 | } |
603 | unless (chdir $udir) { |
604 | warn "Can't cd to $udir: $!\n"; |
605 | return; |
606 | } |
607 | } |
608 | |
57e73c4b |
609 | push @Stack,[$dir_loc,$pdir_loc,$p_dir,$dir_rel,-1] if $bydepth; |
610 | |
81793b90 |
611 | while (defined $SE) { |
612 | |
613 | unless ($bydepth) { |
704ea872 |
614 | # change to parent directory |
615 | unless ($no_chdir) { |
616 | my $udir = $pdir_loc; |
617 | if ($untaint) { |
618 | $udir = $1 if $pdir_loc =~ m|$untaint_pat|; |
619 | } |
620 | unless (chdir $udir) { |
621 | warn "Can't cd to $udir: $!\n"; |
622 | next; |
623 | } |
624 | } |
81793b90 |
625 | $dir= $p_dir; |
626 | $name= $dir_name; |
627 | $_= ($no_chdir ? $dir_name : $dir_rel ); |
628 | $fullname= $dir_loc; |
629 | # prune may happen here |
630 | $prune= 0; |
704ea872 |
631 | lstat($_); # make sure file tests with '_' work |
73396e07 |
632 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
633 | next if $prune; |
634 | } |
635 | |
636 | # change to that directory |
637 | unless ($no_chdir or $dir_rel eq '.') { |
638 | my $udir = $dir_loc; |
639 | if ($untaint) { |
640 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
641 | unless (defined $udir ) { |
642 | if ($untaint_skip == 0) { |
643 | die "directory $dir_loc is still tainted"; |
a0d0e21e |
644 | } |
237437d0 |
645 | else { |
81793b90 |
646 | next; |
237437d0 |
647 | } |
a0d0e21e |
648 | } |
649 | } |
81793b90 |
650 | unless (chdir $udir) { |
651 | warn "Can't cd to $udir: $!\n"; |
652 | next; |
653 | } |
654 | } |
655 | |
656 | $dir = $dir_name; |
657 | |
658 | # Get the list of files in the current directory. |
659 | unless (opendir DIR, ($no_chdir ? $dir_loc : '.')) { |
660 | warn "Can't opendir($dir_loc): $!\n"; |
661 | next; |
662 | } |
663 | @filenames = readdir DIR; |
664 | closedir(DIR); |
665 | |
666 | for my $FN (@filenames) { |
c7b9dd21 |
667 | next if $FN =~ /^\.{1,2}\z/; |
81793b90 |
668 | |
669 | # follow symbolic links / do an lstat |
07867069 |
670 | $new_loc = Follow_SymLink($loc_pref.$FN); |
81793b90 |
671 | |
672 | # ignore if invalid symlink |
673 | next unless defined $new_loc; |
674 | |
675 | if (-d _) { |
57e73c4b |
676 | push @Stack,[$new_loc,$dir_loc,$dir_name,$FN,1]; |
81793b90 |
677 | } |
678 | else { |
679 | $fullname = $new_loc; |
07867069 |
680 | $name = $dir_pref . $FN; |
81793b90 |
681 | $_ = ($no_chdir ? $name : $FN); |
73396e07 |
682 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
683 | } |
684 | } |
685 | |
81793b90 |
686 | } |
687 | continue { |
57e73c4b |
688 | while (defined($SE = pop @Stack)) { |
689 | ($dir_loc, $pdir_loc, $p_dir, $dir_rel, $byd_flag) = @$SE; |
07867069 |
690 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); |
691 | $dir_pref = "$dir_name/"; |
692 | $loc_pref = "$dir_loc/"; |
57e73c4b |
693 | if ( $byd_flag < 0 ) { # must be finddepth, report dirname now |
694 | unless ($no_chdir or $dir_rel eq '.') { |
695 | my $udir = $pdir_loc; |
696 | if ($untaint) { |
697 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
698 | } |
699 | unless (chdir $udir) { |
700 | warn "Can't cd to $udir: $!\n"; |
701 | next; |
702 | } |
703 | } |
704 | $fullname = $dir_loc; |
705 | $name = $dir_name; |
57907763 |
706 | if ( substr($name,-2) eq '/.' ) { |
707 | $name =~ s|/\.$||; |
708 | } |
57e73c4b |
709 | $dir = $p_dir; |
710 | $_ = ($no_chdir ? $dir_name : $dir_rel); |
57907763 |
711 | if ( substr($_,-2) eq '/.' ) { |
712 | s|/\.$||; |
713 | } |
714 | |
704ea872 |
715 | lstat($_); # make sure file tests with '_' work |
73396e07 |
716 | { &$wanted_callback }; # protect against wild "next" |
57e73c4b |
717 | } else { |
718 | push @Stack,[$dir_loc, $pdir_loc, $p_dir, $dir_rel,-1] if $bydepth; |
719 | last; |
720 | } |
a0d0e21e |
721 | } |
722 | } |
723 | } |
724 | |
81793b90 |
725 | |
20408e3c |
726 | sub wrap_wanted { |
81793b90 |
727 | my $wanted = shift; |
728 | if ( ref($wanted) eq 'HASH' ) { |
729 | if ( $wanted->{follow} || $wanted->{follow_fast}) { |
730 | $wanted->{follow_skip} = 1 unless defined $wanted->{follow_skip}; |
731 | } |
732 | if ( $wanted->{untaint} ) { |
733 | $wanted->{untaint_pattern} = qr|^([-+@\w./]+)$| |
734 | unless defined $wanted->{untaint_pattern}; |
735 | $wanted->{untaint_skip} = 0 unless defined $wanted->{untaint_skip}; |
736 | } |
737 | return $wanted; |
738 | } |
739 | else { |
740 | return { wanted => $wanted }; |
741 | } |
a0d0e21e |
742 | } |
743 | |
20408e3c |
744 | sub find { |
81793b90 |
745 | my $wanted = shift; |
746 | _find_opt(wrap_wanted($wanted), @_); |
747 | %SLnkSeen= (); # free memory |
a0d0e21e |
748 | } |
749 | |
55d729e4 |
750 | sub finddepth { |
81793b90 |
751 | my $wanted = wrap_wanted(shift); |
752 | $wanted->{bydepth} = 1; |
753 | _find_opt($wanted, @_); |
754 | %SLnkSeen= (); # free memory |
20408e3c |
755 | } |
6280b799 |
756 | |
757 | # These are hard-coded for now, but may move to hint files. |
10eba763 |
758 | if ($^O eq 'VMS') { |
81793b90 |
759 | $Is_VMS = 1; |
760 | $File::Find::dont_use_nlink = 1; |
748a9306 |
761 | } |
762 | |
81793b90 |
763 | $File::Find::dont_use_nlink = 1 |
497711e7 |
764 | if $^O eq 'os2' || $^O eq 'dos' || $^O eq 'amigaos' || $^O eq 'MSWin32' || |
fa6a1c44 |
765 | $^O eq 'cygwin' || $^O eq 'epoc'; |
6280b799 |
766 | |
20408e3c |
767 | # Set dont_use_nlink in your hint file if your system's stat doesn't |
768 | # report the number of links in a directory as an indication |
769 | # of the number of files. |
770 | # See, e.g. hints/machten.sh for MachTen 2.2. |
81793b90 |
771 | unless ($File::Find::dont_use_nlink) { |
772 | require Config; |
773 | $File::Find::dont_use_nlink = 1 if ($Config::Config{'dont_use_nlink'}); |
20408e3c |
774 | } |
775 | |
a0d0e21e |
776 | 1; |