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1 | package File::Find; |
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2 | use strict; |
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3 | use 5.005_64; |
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4 | our $VERSION = '1.00'; |
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5 | require Exporter; |
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6 | require Cwd; |
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7 | |
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8 | =head1 NAME |
9 | |
10 | find - traverse a file tree |
11 | |
12 | finddepth - traverse a directory structure depth-first |
13 | |
14 | =head1 SYNOPSIS |
15 | |
16 | use File::Find; |
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17 | find(\&wanted, '/foo', '/bar'); |
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18 | sub wanted { ... } |
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19 | |
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20 | use File::Find; |
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21 | finddepth(\&wanted, '/foo', '/bar'); |
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22 | sub wanted { ... } |
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23 | |
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24 | use File::Find; |
25 | find({ wanted => \&process, follow => 1 }, '.'); |
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26 | |
27 | =head1 DESCRIPTION |
28 | |
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29 | The first argument to find() is either a hash reference describing the |
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30 | operations to be performed for each file, or a code reference. |
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31 | |
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32 | Here are the possible keys for the hash: |
33 | |
34 | =over 3 |
35 | |
36 | =item C<wanted> |
37 | |
38 | The value should be a code reference. This code reference is called |
39 | I<the wanted() function> below. |
40 | |
41 | =item C<bydepth> |
42 | |
43 | Reports the name of a directory only AFTER all its entries |
44 | have been reported. Entry point finddepth() is a shortcut for |
45 | specifying C<{ bydepth => 1 }> in the first argument of find(). |
46 | |
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47 | =item C<preprocess> |
48 | |
49 | The value should be a code reference. This code reference is used to |
50 | preprocess a directory; it is called after readdir() but before the loop that |
51 | calls the wanted() function. It is called with a list of strings and is |
52 | expected to return a list of strings. The code can be used to sort the |
53 | strings alphabetically, numerically, or to filter out directory entries based |
54 | on their name alone. |
55 | |
56 | =item C<postprocess> |
57 | |
58 | The value should be a code reference. It is invoked just before leaving the |
59 | current directory. It is called in void context with no arguments. The name |
60 | of the current directory is in $File::Find::dir. This hook is handy for |
61 | summarizing a directory, such as calculating its disk usage. |
62 | |
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63 | =item C<follow> |
64 | |
65 | Causes symbolic links to be followed. Since directory trees with symbolic |
66 | links (followed) may contain files more than once and may even have |
67 | cycles, a hash has to be built up with an entry for each file. |
68 | This might be expensive both in space and time for a large |
69 | directory tree. See I<follow_fast> and I<follow_skip> below. |
70 | If either I<follow> or I<follow_fast> is in effect: |
71 | |
72 | =over 6 |
73 | |
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74 | =item * |
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75 | |
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76 | It is guaranteed that an I<lstat> has been called before the user's |
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77 | I<wanted()> function is called. This enables fast file checks involving S< _>. |
78 | |
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79 | =item * |
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80 | |
81 | There is a variable C<$File::Find::fullname> which holds the absolute |
82 | pathname of the file with all symbolic links resolved |
83 | |
84 | =back |
85 | |
86 | =item C<follow_fast> |
87 | |
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88 | This is similar to I<follow> except that it may report some files more |
89 | than once. It does detect cycles, however. Since only symbolic links |
90 | have to be hashed, this is much cheaper both in space and time. If |
91 | processing a file more than once (by the user's I<wanted()> function) |
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92 | is worse than just taking time, the option I<follow> should be used. |
93 | |
94 | =item C<follow_skip> |
95 | |
96 | C<follow_skip==1>, which is the default, causes all files which are |
97 | neither directories nor symbolic links to be ignored if they are about |
98 | to be processed a second time. If a directory or a symbolic link |
99 | are about to be processed a second time, File::Find dies. |
100 | C<follow_skip==0> causes File::Find to die if any file is about to be |
101 | processed a second time. |
102 | C<follow_skip==2> causes File::Find to ignore any duplicate files and |
103 | dirctories but to proceed normally otherwise. |
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104 | |
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105 | |
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106 | =item C<no_chdir> |
107 | |
108 | Does not C<chdir()> to each directory as it recurses. The wanted() |
109 | function will need to be aware of this, of course. In this case, |
110 | C<$_> will be the same as C<$File::Find::name>. |
111 | |
112 | =item C<untaint> |
113 | |
114 | If find is used in taint-mode (-T command line switch or if EUID != UID |
115 | or if EGID != GID) then internally directory names have to be untainted |
116 | before they can be cd'ed to. Therefore they are checked against a regular |
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117 | expression I<untaint_pattern>. Note that all names passed to the |
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118 | user's I<wanted()> function are still tainted. |
119 | |
120 | =item C<untaint_pattern> |
121 | |
122 | See above. This should be set using the C<qr> quoting operator. |
123 | The default is set to C<qr|^([-+@\w./]+)$|>. |
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124 | Note that the parantheses are vital. |
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125 | |
126 | =item C<untaint_skip> |
127 | |
128 | If set, directories (subtrees) which fail the I<untaint_pattern> |
129 | are skipped. The default is to 'die' in such a case. |
130 | |
131 | =back |
132 | |
133 | The wanted() function does whatever verifications you want. |
134 | C<$File::Find::dir> contains the current directory name, and C<$_> the |
135 | current filename within that directory. C<$File::Find::name> contains |
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136 | the complete pathname to the file. You are chdir()'d to |
137 | C<$File::Find::dir> when the function is called, unless C<no_chdir> |
138 | was specified. When <follow> or <follow_fast> are in effect, there is |
139 | also a C<$File::Find::fullname>. The function may set |
140 | C<$File::Find::prune> to prune the tree unless C<bydepth> was |
141 | specified. Unless C<follow> or C<follow_fast> is specified, for |
142 | compatibility reasons (find.pl, find2perl) there are in addition the |
143 | following globals available: C<$File::Find::topdir>, |
144 | C<$File::Find::topdev>, C<$File::Find::topino>, |
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145 | C<$File::Find::topmode> and C<$File::Find::topnlink>. |
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146 | |
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147 | This library is useful for the C<find2perl> tool, which when fed, |
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148 | |
149 | find2perl / -name .nfs\* -mtime +7 \ |
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150 | -exec rm -f {} \; -o -fstype nfs -prune |
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151 | |
152 | produces something like: |
153 | |
154 | sub wanted { |
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155 | /^\.nfs.*\z/s && |
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156 | (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_)) && |
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157 | int(-M _) > 7 && |
158 | unlink($_) |
159 | || |
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160 | ($nlink || (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_))) && |
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161 | $dev < 0 && |
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162 | ($File::Find::prune = 1); |
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163 | } |
164 | |
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165 | Set the variable C<$File::Find::dont_use_nlink> if you're using AFS, |
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166 | since AFS cheats. |
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167 | |
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168 | |
169 | Here's another interesting wanted function. It will find all symlinks |
170 | that don't resolve: |
171 | |
172 | sub wanted { |
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173 | -l && !-e && print "bogus link: $File::Find::name\n"; |
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174 | } |
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175 | |
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176 | See also the script C<pfind> on CPAN for a nice application of this |
177 | module. |
178 | |
179 | =head1 CAVEAT |
180 | |
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181 | Be aware that the option to follow symbolic links can be dangerous. |
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182 | Depending on the structure of the directory tree (including symbolic |
183 | links to directories) you might traverse a given (physical) directory |
184 | more than once (only if C<follow_fast> is in effect). |
185 | Furthermore, deleting or changing files in a symbolically linked directory |
186 | might cause very unpleasant surprises, since you delete or change files |
187 | in an unknown directory. |
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188 | |
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189 | |
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190 | =cut |
191 | |
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192 | our @ISA = qw(Exporter); |
193 | our @EXPORT = qw(find finddepth); |
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194 | |
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195 | |
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196 | use strict; |
197 | my $Is_VMS; |
198 | |
199 | require File::Basename; |
200 | |
201 | my %SLnkSeen; |
202 | my ($wanted_callback, $avoid_nlink, $bydepth, $no_chdir, $follow, |
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203 | $follow_skip, $full_check, $untaint, $untaint_skip, $untaint_pat, |
204 | $pre_process, $post_process); |
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205 | |
206 | sub contract_name { |
207 | my ($cdir,$fn) = @_; |
208 | |
209 | return substr($cdir,0,rindex($cdir,'/')) if $fn eq '.'; |
210 | |
211 | $cdir = substr($cdir,0,rindex($cdir,'/')+1); |
212 | |
213 | $fn =~ s|^\./||; |
214 | |
215 | my $abs_name= $cdir . $fn; |
216 | |
217 | if (substr($fn,0,3) eq '../') { |
218 | do 1 while ($abs_name=~ s|/(?>[^/]+)/\.\./|/|); |
219 | } |
220 | |
221 | return $abs_name; |
222 | } |
223 | |
224 | |
225 | sub PathCombine($$) { |
226 | my ($Base,$Name) = @_; |
227 | my $AbsName; |
228 | |
229 | if (substr($Name,0,1) eq '/') { |
230 | $AbsName= $Name; |
231 | } |
232 | else { |
233 | $AbsName= contract_name($Base,$Name); |
234 | } |
235 | |
236 | # (simple) check for recursion |
237 | my $newlen= length($AbsName); |
238 | if ($newlen <= length($Base)) { |
239 | if (($newlen == length($Base) || substr($Base,$newlen,1) eq '/') |
240 | && $AbsName eq substr($Base,0,$newlen)) |
241 | { |
242 | return undef; |
243 | } |
244 | } |
245 | return $AbsName; |
246 | } |
247 | |
248 | sub Follow_SymLink($) { |
249 | my ($AbsName) = @_; |
250 | |
251 | my ($NewName,$DEV, $INO); |
252 | ($DEV, $INO)= lstat $AbsName; |
253 | |
254 | while (-l _) { |
255 | if ($SLnkSeen{$DEV, $INO}++) { |
256 | if ($follow_skip < 2) { |
257 | die "$AbsName is encountered a second time"; |
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258 | } |
259 | else { |
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260 | return undef; |
a0d0e21e |
261 | } |
262 | } |
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263 | $NewName= PathCombine($AbsName, readlink($AbsName)); |
264 | unless(defined $NewName) { |
265 | if ($follow_skip < 2) { |
266 | die "$AbsName is a recursive symbolic link"; |
267 | } |
268 | else { |
269 | return undef; |
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270 | } |
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271 | } |
272 | else { |
273 | $AbsName= $NewName; |
274 | } |
275 | ($DEV, $INO) = lstat($AbsName); |
276 | return undef unless defined $DEV; # dangling symbolic link |
277 | } |
278 | |
279 | if ($full_check && $SLnkSeen{$DEV, $INO}++) { |
280 | if ($follow_skip < 1) { |
281 | die "$AbsName encountered a second time"; |
282 | } |
283 | else { |
284 | return undef; |
285 | } |
286 | } |
287 | |
288 | return $AbsName; |
289 | } |
290 | |
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291 | our($dir, $name, $fullname, $prune); |
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292 | sub _find_dir_symlnk($$$); |
293 | sub _find_dir($$$); |
294 | |
295 | sub _find_opt { |
296 | my $wanted = shift; |
297 | die "invalid top directory" unless defined $_[0]; |
298 | |
299 | my $cwd = $wanted->{bydepth} ? Cwd::fastcwd() : Cwd::cwd(); |
300 | my $cwd_untainted = $cwd; |
301 | $wanted_callback = $wanted->{wanted}; |
302 | $bydepth = $wanted->{bydepth}; |
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303 | $pre_process = $wanted->{preprocess}; |
304 | $post_process = $wanted->{postprocess}; |
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305 | $no_chdir = $wanted->{no_chdir}; |
306 | $full_check = $wanted->{follow}; |
307 | $follow = $full_check || $wanted->{follow_fast}; |
308 | $follow_skip = $wanted->{follow_skip}; |
309 | $untaint = $wanted->{untaint}; |
310 | $untaint_pat = $wanted->{untaint_pattern}; |
311 | $untaint_skip = $wanted->{untaint_skip}; |
312 | |
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313 | # for compatability reasons (find.pl, find2perl) |
314 | our ($topdir, $topdev, $topino, $topmode, $topnlink); |
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315 | |
316 | # a symbolic link to a directory doesn't increase the link count |
317 | $avoid_nlink = $follow || $File::Find::dont_use_nlink; |
318 | |
319 | if ( $untaint ) { |
320 | $cwd_untainted= $1 if $cwd_untainted =~ m|$untaint_pat|; |
321 | die "insecure cwd in find(depth)" unless defined($cwd_untainted); |
322 | } |
323 | |
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324 | my ($abs_dir, $Is_Dir); |
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325 | |
326 | Proc_Top_Item: |
327 | foreach my $TOP (@_) { |
328 | my $top_item = $TOP; |
c7b9dd21 |
329 | $top_item =~ s|/\z|| unless $top_item eq '/'; |
81793b90 |
330 | $Is_Dir= 0; |
331 | |
3d1e7443 |
332 | ($topdev,$topino,$topmode,$topnlink) = stat $top_item; |
333 | |
81793b90 |
334 | if ($follow) { |
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 |
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355 | $topdir = $top_item; |
e7b91b67 |
356 | unless (defined $topnlink) { |
81793b90 |
357 | warn "Can't stat $top_item: $!\n"; |
358 | next Proc_Top_Item; |
359 | } |
360 | if (-d _) { |
c7b9dd21 |
361 | $top_item =~ s/\.dir\z// if $Is_VMS; |
e7b91b67 |
362 | _find_dir($wanted, $top_item, $topnlink); |
81793b90 |
363 | $Is_Dir= 1; |
364 | } |
237437d0 |
365 | else { |
81793b90 |
366 | $abs_dir= $top_item; |
367 | } |
368 | } |
369 | |
370 | unless ($Is_Dir) { |
371 | unless (($_,$dir) = File::Basename::fileparse($abs_dir)) { |
719911cc |
372 | ($dir,$_) = ('./', $top_item); |
81793b90 |
373 | } |
374 | |
375 | $abs_dir = $dir; |
376 | if ($untaint) { |
377 | my $abs_dir_save = $abs_dir; |
378 | $abs_dir = $1 if $abs_dir =~ m|$untaint_pat|; |
379 | unless (defined $abs_dir) { |
380 | if ($untaint_skip == 0) { |
381 | die "directory $abs_dir_save is still tainted"; |
382 | } |
383 | else { |
384 | next Proc_Top_Item; |
385 | } |
386 | } |
387 | } |
388 | |
389 | unless ($no_chdir or chdir $abs_dir) { |
390 | warn "Couldn't chdir $abs_dir: $!\n"; |
391 | next Proc_Top_Item; |
392 | } |
719911cc |
393 | |
394 | $name = $abs_dir . $_; |
395 | |
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396 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
397 | |
398 | } |
399 | |
400 | $no_chdir or chdir $cwd_untainted; |
401 | } |
402 | } |
403 | |
404 | # API: |
405 | # $wanted |
406 | # $p_dir : "parent directory" |
407 | # $nlink : what came back from the stat |
408 | # preconditions: |
409 | # chdir (if not no_chdir) to dir |
410 | |
411 | sub _find_dir($$$) { |
412 | my ($wanted, $p_dir, $nlink) = @_; |
413 | my ($CdLvl,$Level) = (0,0); |
414 | my @Stack; |
415 | my @filenames; |
416 | my ($subcount,$sub_nlink); |
417 | my $SE= []; |
418 | my $dir_name= $p_dir; |
07867069 |
419 | my $dir_pref= ( $p_dir eq '/' ? '/' : "$p_dir/" ); |
81793b90 |
420 | my $dir_rel= '.'; # directory name relative to current directory |
421 | |
422 | local ($dir, $name, $prune, *DIR); |
423 | |
424 | unless ($no_chdir or $p_dir eq '.') { |
425 | my $udir = $p_dir; |
426 | if ($untaint) { |
427 | $udir = $1 if $p_dir =~ m|$untaint_pat|; |
428 | unless (defined $udir) { |
429 | if ($untaint_skip == 0) { |
430 | die "directory $p_dir is still tainted"; |
431 | } |
432 | else { |
433 | return; |
434 | } |
237437d0 |
435 | } |
a0d0e21e |
436 | } |
81793b90 |
437 | unless (chdir $udir) { |
438 | warn "Can't cd to $udir: $!\n"; |
439 | return; |
440 | } |
441 | } |
57e73c4b |
442 | |
443 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; |
81793b90 |
444 | |
445 | while (defined $SE) { |
446 | unless ($bydepth) { |
447 | $dir= $p_dir; |
448 | $name= $dir_name; |
449 | $_= ($no_chdir ? $dir_name : $dir_rel ); |
450 | # prune may happen here |
451 | $prune= 0; |
73396e07 |
452 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
453 | next if $prune; |
454 | } |
455 | |
456 | # change to that directory |
457 | unless ($no_chdir or $dir_rel eq '.') { |
458 | my $udir= $dir_rel; |
459 | if ($untaint) { |
460 | $udir = $1 if $dir_rel =~ m|$untaint_pat|; |
461 | unless (defined $udir) { |
462 | if ($untaint_skip == 0) { |
07867069 |
463 | die "directory (" |
464 | . ($p_dir ne '/' ? $p_dir : '') |
465 | . "/) $dir_rel is still tainted"; |
81793b90 |
466 | } |
467 | } |
468 | } |
469 | unless (chdir $udir) { |
07867069 |
470 | warn "Can't cd to (" |
471 | . ($p_dir ne '/' ? $p_dir : '') |
472 | . "/) $udir : $!\n"; |
81793b90 |
473 | next; |
474 | } |
475 | $CdLvl++; |
476 | } |
477 | |
478 | $dir= $dir_name; |
479 | |
480 | # Get the list of files in the current directory. |
481 | unless (opendir DIR, ($no_chdir ? $dir_name : '.')) { |
482 | warn "Can't opendir($dir_name): $!\n"; |
483 | next; |
484 | } |
485 | @filenames = readdir DIR; |
486 | closedir(DIR); |
719c805e |
487 | @filenames = &$pre_process(@filenames) if $pre_process; |
488 | push @Stack,[$CdLvl,$dir_name,"",-2] if $post_process; |
81793b90 |
489 | |
490 | if ($nlink == 2 && !$avoid_nlink) { |
491 | # This dir has no subdirectories. |
492 | for my $FN (@filenames) { |
c7b9dd21 |
493 | next if $FN =~ /^\.{1,2}\z/; |
81793b90 |
494 | |
07867069 |
495 | $name = $dir_pref . $FN; |
81793b90 |
496 | $_ = ($no_chdir ? $name : $FN); |
73396e07 |
497 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
498 | } |
499 | |
500 | } |
501 | else { |
502 | # This dir has subdirectories. |
503 | $subcount = $nlink - 2; |
504 | |
505 | for my $FN (@filenames) { |
c7b9dd21 |
506 | next if $FN =~ /^\.{1,2}\z/; |
81793b90 |
507 | if ($subcount > 0 || $avoid_nlink) { |
508 | # Seen all the subdirs? |
509 | # check for directoriness. |
510 | # stat is faster for a file in the current directory |
07867069 |
511 | $sub_nlink = (lstat ($no_chdir ? $dir_pref . $FN : $FN))[3]; |
81793b90 |
512 | |
513 | if (-d _) { |
514 | --$subcount; |
c7b9dd21 |
515 | $FN =~ s/\.dir\z// if $Is_VMS; |
81793b90 |
516 | push @Stack,[$CdLvl,$dir_name,$FN,$sub_nlink]; |
517 | } |
518 | else { |
07867069 |
519 | $name = $dir_pref . $FN; |
81793b90 |
520 | $_= ($no_chdir ? $name : $FN); |
73396e07 |
521 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
522 | } |
523 | } |
07867069 |
524 | else { |
525 | $name = $dir_pref . $FN; |
81793b90 |
526 | $_= ($no_chdir ? $name : $FN); |
73396e07 |
527 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
528 | } |
529 | } |
530 | } |
17b275ff |
531 | } |
532 | continue { |
57e73c4b |
533 | while ( defined ($SE = pop @Stack) ) { |
81793b90 |
534 | ($Level, $p_dir, $dir_rel, $nlink) = @$SE; |
535 | if ($CdLvl > $Level && !$no_chdir) { |
f0963acb |
536 | my $tmp = join('/',('..') x ($CdLvl-$Level)); |
537 | die "Can't cd to $dir_name" . $tmp |
538 | unless chdir ($tmp); |
81793b90 |
539 | $CdLvl = $Level; |
540 | } |
07867069 |
541 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); |
542 | $dir_pref = "$dir_name/"; |
719c805e |
543 | if ( $nlink == -2 ) { |
544 | $name = $dir = $p_dir; |
545 | $_ = "."; |
546 | &$post_process; # End-of-directory processing |
547 | } elsif ( $nlink < 0 ) { # must be finddepth, report dirname now |
57e73c4b |
548 | $name = $dir_name; |
57907763 |
549 | if ( substr($name,-2) eq '/.' ) { |
550 | $name =~ s|/\.$||; |
551 | } |
57e73c4b |
552 | $dir = $p_dir; |
553 | $_ = ($no_chdir ? $dir_name : $dir_rel ); |
57907763 |
554 | if ( substr($_,-2) eq '/.' ) { |
555 | s|/\.$||; |
556 | } |
73396e07 |
557 | { &$wanted_callback }; # protect against wild "next" |
57e73c4b |
558 | } else { |
559 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; |
560 | last; |
561 | } |
81793b90 |
562 | } |
a0d0e21e |
563 | } |
564 | } |
565 | |
81793b90 |
566 | |
567 | # API: |
568 | # $wanted |
569 | # $dir_loc : absolute location of a dir |
570 | # $p_dir : "parent directory" |
571 | # preconditions: |
572 | # chdir (if not no_chdir) to dir |
573 | |
574 | sub _find_dir_symlnk($$$) { |
575 | my ($wanted, $dir_loc, $p_dir) = @_; |
576 | my @Stack; |
577 | my @filenames; |
578 | my $new_loc; |
57e73c4b |
579 | my $pdir_loc = $dir_loc; |
81793b90 |
580 | my $SE = []; |
581 | my $dir_name = $p_dir; |
07867069 |
582 | my $dir_pref = ( $p_dir eq '/' ? '/' : "$p_dir/" ); |
583 | my $loc_pref = ( $dir_loc eq '/' ? '/' : "$dir_loc/" ); |
81793b90 |
584 | my $dir_rel = '.'; # directory name relative to current directory |
57e73c4b |
585 | my $byd_flag; # flag for pending stack entry if $bydepth |
81793b90 |
586 | |
587 | local ($dir, $name, $fullname, $prune, *DIR); |
588 | |
589 | unless ($no_chdir or $p_dir eq '.') { |
590 | my $udir = $dir_loc; |
591 | if ($untaint) { |
592 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
593 | unless (defined $udir) { |
594 | if ($untaint_skip == 0) { |
595 | die "directory $dir_loc is still tainted"; |
596 | } |
597 | else { |
598 | return; |
599 | } |
600 | } |
601 | } |
602 | unless (chdir $udir) { |
603 | warn "Can't cd to $udir: $!\n"; |
604 | return; |
605 | } |
606 | } |
607 | |
57e73c4b |
608 | push @Stack,[$dir_loc,$pdir_loc,$p_dir,$dir_rel,-1] if $bydepth; |
609 | |
81793b90 |
610 | while (defined $SE) { |
611 | |
612 | unless ($bydepth) { |
704ea872 |
613 | # change to parent directory |
614 | unless ($no_chdir) { |
615 | my $udir = $pdir_loc; |
616 | if ($untaint) { |
617 | $udir = $1 if $pdir_loc =~ m|$untaint_pat|; |
618 | } |
619 | unless (chdir $udir) { |
620 | warn "Can't cd to $udir: $!\n"; |
621 | next; |
622 | } |
623 | } |
81793b90 |
624 | $dir= $p_dir; |
625 | $name= $dir_name; |
626 | $_= ($no_chdir ? $dir_name : $dir_rel ); |
627 | $fullname= $dir_loc; |
628 | # prune may happen here |
629 | $prune= 0; |
704ea872 |
630 | lstat($_); # make sure file tests with '_' work |
73396e07 |
631 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
632 | next if $prune; |
633 | } |
634 | |
635 | # change to that directory |
636 | unless ($no_chdir or $dir_rel eq '.') { |
637 | my $udir = $dir_loc; |
638 | if ($untaint) { |
639 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
640 | unless (defined $udir ) { |
641 | if ($untaint_skip == 0) { |
642 | die "directory $dir_loc is still tainted"; |
a0d0e21e |
643 | } |
237437d0 |
644 | else { |
81793b90 |
645 | next; |
237437d0 |
646 | } |
a0d0e21e |
647 | } |
648 | } |
81793b90 |
649 | unless (chdir $udir) { |
650 | warn "Can't cd to $udir: $!\n"; |
651 | next; |
652 | } |
653 | } |
654 | |
655 | $dir = $dir_name; |
656 | |
657 | # Get the list of files in the current directory. |
658 | unless (opendir DIR, ($no_chdir ? $dir_loc : '.')) { |
659 | warn "Can't opendir($dir_loc): $!\n"; |
660 | next; |
661 | } |
662 | @filenames = readdir DIR; |
663 | closedir(DIR); |
664 | |
665 | for my $FN (@filenames) { |
c7b9dd21 |
666 | next if $FN =~ /^\.{1,2}\z/; |
81793b90 |
667 | |
668 | # follow symbolic links / do an lstat |
07867069 |
669 | $new_loc = Follow_SymLink($loc_pref.$FN); |
81793b90 |
670 | |
671 | # ignore if invalid symlink |
672 | next unless defined $new_loc; |
673 | |
674 | if (-d _) { |
57e73c4b |
675 | push @Stack,[$new_loc,$dir_loc,$dir_name,$FN,1]; |
81793b90 |
676 | } |
677 | else { |
678 | $fullname = $new_loc; |
07867069 |
679 | $name = $dir_pref . $FN; |
81793b90 |
680 | $_ = ($no_chdir ? $name : $FN); |
73396e07 |
681 | { &$wanted_callback }; # protect against wild "next" |
81793b90 |
682 | } |
683 | } |
684 | |
81793b90 |
685 | } |
686 | continue { |
57e73c4b |
687 | while (defined($SE = pop @Stack)) { |
688 | ($dir_loc, $pdir_loc, $p_dir, $dir_rel, $byd_flag) = @$SE; |
07867069 |
689 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); |
690 | $dir_pref = "$dir_name/"; |
691 | $loc_pref = "$dir_loc/"; |
57e73c4b |
692 | if ( $byd_flag < 0 ) { # must be finddepth, report dirname now |
693 | unless ($no_chdir or $dir_rel eq '.') { |
694 | my $udir = $pdir_loc; |
695 | if ($untaint) { |
696 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
697 | } |
698 | unless (chdir $udir) { |
699 | warn "Can't cd to $udir: $!\n"; |
700 | next; |
701 | } |
702 | } |
703 | $fullname = $dir_loc; |
704 | $name = $dir_name; |
57907763 |
705 | if ( substr($name,-2) eq '/.' ) { |
706 | $name =~ s|/\.$||; |
707 | } |
57e73c4b |
708 | $dir = $p_dir; |
709 | $_ = ($no_chdir ? $dir_name : $dir_rel); |
57907763 |
710 | if ( substr($_,-2) eq '/.' ) { |
711 | s|/\.$||; |
712 | } |
713 | |
704ea872 |
714 | lstat($_); # make sure file tests with '_' work |
73396e07 |
715 | { &$wanted_callback }; # protect against wild "next" |
57e73c4b |
716 | } else { |
717 | push @Stack,[$dir_loc, $pdir_loc, $p_dir, $dir_rel,-1] if $bydepth; |
718 | last; |
719 | } |
a0d0e21e |
720 | } |
721 | } |
722 | } |
723 | |
81793b90 |
724 | |
20408e3c |
725 | sub wrap_wanted { |
81793b90 |
726 | my $wanted = shift; |
727 | if ( ref($wanted) eq 'HASH' ) { |
728 | if ( $wanted->{follow} || $wanted->{follow_fast}) { |
729 | $wanted->{follow_skip} = 1 unless defined $wanted->{follow_skip}; |
730 | } |
731 | if ( $wanted->{untaint} ) { |
732 | $wanted->{untaint_pattern} = qr|^([-+@\w./]+)$| |
733 | unless defined $wanted->{untaint_pattern}; |
734 | $wanted->{untaint_skip} = 0 unless defined $wanted->{untaint_skip}; |
735 | } |
736 | return $wanted; |
737 | } |
738 | else { |
739 | return { wanted => $wanted }; |
740 | } |
a0d0e21e |
741 | } |
742 | |
20408e3c |
743 | sub find { |
81793b90 |
744 | my $wanted = shift; |
745 | _find_opt(wrap_wanted($wanted), @_); |
746 | %SLnkSeen= (); # free memory |
a0d0e21e |
747 | } |
748 | |
55d729e4 |
749 | sub finddepth { |
81793b90 |
750 | my $wanted = wrap_wanted(shift); |
751 | $wanted->{bydepth} = 1; |
752 | _find_opt($wanted, @_); |
753 | %SLnkSeen= (); # free memory |
20408e3c |
754 | } |
6280b799 |
755 | |
756 | # These are hard-coded for now, but may move to hint files. |
10eba763 |
757 | if ($^O eq 'VMS') { |
81793b90 |
758 | $Is_VMS = 1; |
759 | $File::Find::dont_use_nlink = 1; |
748a9306 |
760 | } |
761 | |
81793b90 |
762 | $File::Find::dont_use_nlink = 1 |
497711e7 |
763 | if $^O eq 'os2' || $^O eq 'dos' || $^O eq 'amigaos' || $^O eq 'MSWin32' || |
fa6a1c44 |
764 | $^O eq 'cygwin' || $^O eq 'epoc'; |
6280b799 |
765 | |
20408e3c |
766 | # Set dont_use_nlink in your hint file if your system's stat doesn't |
767 | # report the number of links in a directory as an indication |
768 | # of the number of files. |
769 | # See, e.g. hints/machten.sh for MachTen 2.2. |
81793b90 |
770 | unless ($File::Find::dont_use_nlink) { |
771 | require Config; |
772 | $File::Find::dont_use_nlink = 1 if ($Config::Config{'dont_use_nlink'}); |
20408e3c |
773 | } |
774 | |
a0d0e21e |
775 | 1; |