[10723] | 1 | package File::Find; |
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[14544] | 2 | use 5.005_64; |
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[10723] | 3 | require Exporter; |
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| 4 | require Cwd; |
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| 5 | |
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| 6 | =head1 NAME |
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| 7 | |
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| 8 | find - traverse a file tree |
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| 9 | |
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| 10 | finddepth - traverse a directory structure depth-first |
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| 11 | |
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| 12 | =head1 SYNOPSIS |
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| 13 | |
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| 14 | use File::Find; |
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[14544] | 15 | find(\&wanted, '/foo', '/bar'); |
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[10723] | 16 | sub wanted { ... } |
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[14544] | 17 | |
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[10723] | 18 | use File::Find; |
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[14544] | 19 | finddepth(\&wanted, '/foo', '/bar'); |
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[10723] | 20 | sub wanted { ... } |
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| 21 | |
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[14544] | 22 | use File::Find; |
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| 23 | find({ wanted => \&process, follow => 1 }, '.'); |
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| 24 | |
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[10723] | 25 | =head1 DESCRIPTION |
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| 26 | |
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[14544] | 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: |
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| 31 | |
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| 32 | =over 3 |
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| 33 | |
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| 34 | =item C<wanted> |
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| 35 | |
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| 36 | The value should be a code reference. This code reference is called |
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| 37 | I<the wanted() function> below. |
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| 38 | |
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| 39 | =item C<bydepth> |
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| 40 | |
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| 41 | Reports the name of a directory only AFTER all its entries |
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| 42 | have been reported. Entry point finddepth() is a shortcut for |
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| 43 | specifying C<{ bydepth => 1 }> in the first argument of find(). |
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| 44 | |
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[17034] | 45 | =item C<preprocess> |
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| 46 | |
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| 47 | The value should be a code reference. This code reference is used to |
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| 48 | preprocess a directory; it is called after readdir() but before the loop that |
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| 49 | calls the wanted() function. It is called with a list of strings and is |
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| 50 | expected to return a list of strings. The code can be used to sort the |
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| 51 | strings alphabetically, numerically, or to filter out directory entries based |
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| 52 | on their name alone. |
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| 53 | |
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| 54 | =item C<postprocess> |
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| 55 | |
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| 56 | The value should be a code reference. It is invoked just before leaving the |
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| 57 | current directory. It is called in void context with no arguments. The name |
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| 58 | of the current directory is in $File::Find::dir. This hook is handy for |
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| 59 | summarizing a directory, such as calculating its disk usage. |
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| 60 | |
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[14544] | 61 | =item C<follow> |
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| 62 | |
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| 63 | Causes symbolic links to be followed. Since directory trees with symbolic |
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| 64 | links (followed) may contain files more than once and may even have |
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| 65 | cycles, a hash has to be built up with an entry for each file. |
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| 66 | This might be expensive both in space and time for a large |
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| 67 | directory tree. See I<follow_fast> and I<follow_skip> below. |
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| 68 | If either I<follow> or I<follow_fast> is in effect: |
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| 69 | |
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| 70 | =over 6 |
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| 71 | |
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| 72 | =item * |
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| 73 | |
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[17034] | 74 | It is guaranteed that an I<lstat> has been called before the user's |
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[14544] | 75 | I<wanted()> function is called. This enables fast file checks involving S< _>. |
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| 76 | |
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| 77 | =item * |
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| 78 | |
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| 79 | There is a variable C<$File::Find::fullname> which holds the absolute |
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| 80 | pathname of the file with all symbolic links resolved |
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| 81 | |
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| 82 | =back |
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| 83 | |
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| 84 | =item C<follow_fast> |
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| 85 | |
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[17034] | 86 | This is similar to I<follow> except that it may report some files more |
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| 87 | than once. It does detect cycles, however. Since only symbolic links |
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| 88 | have to be hashed, this is much cheaper both in space and time. If |
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| 89 | processing a file more than once (by the user's I<wanted()> function) |
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[14544] | 90 | is worse than just taking time, the option I<follow> should be used. |
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| 91 | |
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| 92 | =item C<follow_skip> |
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| 93 | |
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| 94 | C<follow_skip==1>, which is the default, causes all files which are |
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| 95 | neither directories nor symbolic links to be ignored if they are about |
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| 96 | to be processed a second time. If a directory or a symbolic link |
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| 97 | are about to be processed a second time, File::Find dies. |
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| 98 | C<follow_skip==0> causes File::Find to die if any file is about to be |
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| 99 | processed a second time. |
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| 100 | C<follow_skip==2> causes File::Find to ignore any duplicate files and |
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| 101 | dirctories but to proceed normally otherwise. |
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| 102 | |
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| 103 | |
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| 104 | =item C<no_chdir> |
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| 105 | |
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| 106 | Does not C<chdir()> to each directory as it recurses. The wanted() |
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| 107 | function will need to be aware of this, of course. In this case, |
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| 108 | C<$_> will be the same as C<$File::Find::name>. |
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| 109 | |
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| 110 | =item C<untaint> |
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| 111 | |
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| 112 | If find is used in taint-mode (-T command line switch or if EUID != UID |
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| 113 | or if EGID != GID) then internally directory names have to be untainted |
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| 114 | before they can be cd'ed to. Therefore they are checked against a regular |
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[17034] | 115 | expression I<untaint_pattern>. Note that all names passed to the |
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[14544] | 116 | user's I<wanted()> function are still tainted. |
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| 117 | |
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| 118 | =item C<untaint_pattern> |
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| 119 | |
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| 120 | See above. This should be set using the C<qr> quoting operator. |
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| 121 | The default is set to C<qr|^([-+@\w./]+)$|>. |
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[17034] | 122 | Note that the parantheses are vital. |
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[14544] | 123 | |
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| 124 | =item C<untaint_skip> |
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| 125 | |
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| 126 | If set, directories (subtrees) which fail the I<untaint_pattern> |
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| 127 | are skipped. The default is to 'die' in such a case. |
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| 128 | |
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| 129 | =back |
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| 130 | |
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[10723] | 131 | The wanted() function does whatever verifications you want. |
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[14544] | 132 | C<$File::Find::dir> contains the current directory name, and C<$_> the |
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| 133 | current filename within that directory. C<$File::Find::name> contains |
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[17034] | 134 | the complete pathname to the file. You are chdir()'d to |
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| 135 | C<$File::Find::dir> when the function is called, unless C<no_chdir> |
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| 136 | was specified. When <follow> or <follow_fast> are in effect, there is |
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| 137 | also a C<$File::Find::fullname>. The function may set |
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| 138 | C<$File::Find::prune> to prune the tree unless C<bydepth> was |
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| 139 | specified. Unless C<follow> or C<follow_fast> is specified, for |
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| 140 | compatibility reasons (find.pl, find2perl) there are in addition the |
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| 141 | following globals available: C<$File::Find::topdir>, |
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| 142 | C<$File::Find::topdev>, C<$File::Find::topino>, |
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[14544] | 143 | C<$File::Find::topmode> and C<$File::Find::topnlink>. |
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[10723] | 144 | |
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[14544] | 145 | This library is useful for the C<find2perl> tool, which when fed, |
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[10723] | 146 | |
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| 147 | find2perl / -name .nfs\* -mtime +7 \ |
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[14544] | 148 | -exec rm -f {} \; -o -fstype nfs -prune |
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[10723] | 149 | |
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| 150 | produces something like: |
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| 151 | |
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| 152 | sub wanted { |
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[14544] | 153 | /^\.nfs.*\z/s && |
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| 154 | (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_)) && |
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[10723] | 155 | int(-M _) > 7 && |
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| 156 | unlink($_) |
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| 157 | || |
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[14544] | 158 | ($nlink || (($dev, $ino, $mode, $nlink, $uid, $gid) = lstat($_))) && |
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[10723] | 159 | $dev < 0 && |
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| 160 | ($File::Find::prune = 1); |
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| 161 | } |
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| 162 | |
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[14544] | 163 | Set the variable C<$File::Find::dont_use_nlink> if you're using AFS, |
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[10723] | 164 | since AFS cheats. |
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| 165 | |
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| 166 | |
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| 167 | Here's another interesting wanted function. It will find all symlinks |
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| 168 | that don't resolve: |
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| 169 | |
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| 170 | sub wanted { |
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[14544] | 171 | -l && !-e && print "bogus link: $File::Find::name\n"; |
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| 172 | } |
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[10723] | 173 | |
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[14544] | 174 | See also the script C<pfind> on CPAN for a nice application of this |
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| 175 | module. |
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[10723] | 176 | |
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[14544] | 177 | =head1 CAVEAT |
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[10723] | 178 | |
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[17034] | 179 | Be aware that the option to follow symbolic links can be dangerous. |
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[14544] | 180 | Depending on the structure of the directory tree (including symbolic |
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| 181 | links to directories) you might traverse a given (physical) directory |
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| 182 | more than once (only if C<follow_fast> is in effect). |
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| 183 | Furthermore, deleting or changing files in a symbolically linked directory |
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| 184 | might cause very unpleasant surprises, since you delete or change files |
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| 185 | in an unknown directory. |
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| 186 | |
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| 187 | |
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[10723] | 188 | =cut |
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| 189 | |
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| 190 | @ISA = qw(Exporter); |
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| 191 | @EXPORT = qw(find finddepth); |
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| 192 | |
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| 193 | |
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[14544] | 194 | use strict; |
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| 195 | my $Is_VMS; |
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| 196 | |
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| 197 | require File::Basename; |
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| 198 | |
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| 199 | my %SLnkSeen; |
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| 200 | my ($wanted_callback, $avoid_nlink, $bydepth, $no_chdir, $follow, |
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[17034] | 201 | $follow_skip, $full_check, $untaint, $untaint_skip, $untaint_pat, |
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| 202 | $pre_process, $post_process); |
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[14544] | 203 | |
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| 204 | sub contract_name { |
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| 205 | my ($cdir,$fn) = @_; |
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| 206 | |
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| 207 | return substr($cdir,0,rindex($cdir,'/')) if $fn eq '.'; |
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| 208 | |
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| 209 | $cdir = substr($cdir,0,rindex($cdir,'/')+1); |
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| 210 | |
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| 211 | $fn =~ s|^\./||; |
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| 212 | |
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| 213 | my $abs_name= $cdir . $fn; |
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| 214 | |
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| 215 | if (substr($fn,0,3) eq '../') { |
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| 216 | do 1 while ($abs_name=~ s|/(?>[^/]+)/\.\./|/|); |
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| 217 | } |
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| 218 | |
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| 219 | return $abs_name; |
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| 220 | } |
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| 221 | |
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| 222 | |
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| 223 | sub PathCombine($$) { |
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| 224 | my ($Base,$Name) = @_; |
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| 225 | my $AbsName; |
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| 226 | |
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| 227 | if (substr($Name,0,1) eq '/') { |
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| 228 | $AbsName= $Name; |
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| 229 | } |
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| 230 | else { |
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| 231 | $AbsName= contract_name($Base,$Name); |
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| 232 | } |
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| 233 | |
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| 234 | # (simple) check for recursion |
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| 235 | my $newlen= length($AbsName); |
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| 236 | if ($newlen <= length($Base)) { |
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| 237 | if (($newlen == length($Base) || substr($Base,$newlen,1) eq '/') |
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| 238 | && $AbsName eq substr($Base,0,$newlen)) |
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| 239 | { |
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| 240 | return undef; |
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| 241 | } |
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| 242 | } |
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| 243 | return $AbsName; |
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| 244 | } |
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| 245 | |
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| 246 | sub Follow_SymLink($) { |
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| 247 | my ($AbsName) = @_; |
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| 248 | |
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| 249 | my ($NewName,$DEV, $INO); |
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| 250 | ($DEV, $INO)= lstat $AbsName; |
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| 251 | |
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| 252 | while (-l _) { |
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| 253 | if ($SLnkSeen{$DEV, $INO}++) { |
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| 254 | if ($follow_skip < 2) { |
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| 255 | die "$AbsName is encountered a second time"; |
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[10723] | 256 | } |
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| 257 | else { |
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[14544] | 258 | return undef; |
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[10723] | 259 | } |
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| 260 | } |
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[14544] | 261 | $NewName= PathCombine($AbsName, readlink($AbsName)); |
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| 262 | unless(defined $NewName) { |
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| 263 | if ($follow_skip < 2) { |
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| 264 | die "$AbsName is a recursive symbolic link"; |
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[10723] | 265 | } |
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[14544] | 266 | else { |
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| 267 | return undef; |
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| 268 | } |
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[10723] | 269 | } |
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[14544] | 270 | else { |
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| 271 | $AbsName= $NewName; |
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| 272 | } |
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| 273 | ($DEV, $INO) = lstat($AbsName); |
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| 274 | return undef unless defined $DEV; # dangling symbolic link |
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[10723] | 275 | } |
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[14544] | 276 | |
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| 277 | if ($full_check && $SLnkSeen{$DEV, $INO}++) { |
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| 278 | if ($follow_skip < 1) { |
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| 279 | die "$AbsName encountered a second time"; |
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| 280 | } |
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| 281 | else { |
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| 282 | return undef; |
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| 283 | } |
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| 284 | } |
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| 285 | |
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| 286 | return $AbsName; |
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[10723] | 287 | } |
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| 288 | |
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[14544] | 289 | our($dir, $name, $fullname, $prune); |
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| 290 | sub _find_dir_symlnk($$$); |
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| 291 | sub _find_dir($$$); |
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[10723] | 292 | |
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[14544] | 293 | sub _find_opt { |
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| 294 | my $wanted = shift; |
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| 295 | die "invalid top directory" unless defined $_[0]; |
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[10723] | 296 | |
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[14544] | 297 | my $cwd = $wanted->{bydepth} ? Cwd::fastcwd() : Cwd::cwd(); |
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| 298 | my $cwd_untainted = $cwd; |
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| 299 | $wanted_callback = $wanted->{wanted}; |
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| 300 | $bydepth = $wanted->{bydepth}; |
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[17034] | 301 | $pre_process = $wanted->{preprocess}; |
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| 302 | $post_process = $wanted->{postprocess}; |
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[14544] | 303 | $no_chdir = $wanted->{no_chdir}; |
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| 304 | $full_check = $wanted->{follow}; |
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| 305 | $follow = $full_check || $wanted->{follow_fast}; |
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| 306 | $follow_skip = $wanted->{follow_skip}; |
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| 307 | $untaint = $wanted->{untaint}; |
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| 308 | $untaint_pat = $wanted->{untaint_pattern}; |
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| 309 | $untaint_skip = $wanted->{untaint_skip}; |
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[10723] | 310 | |
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[14544] | 311 | # for compatability reasons (find.pl, find2perl) |
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| 312 | our ($topdir, $topdev, $topino, $topmode, $topnlink); |
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| 313 | |
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| 314 | # a symbolic link to a directory doesn't increase the link count |
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| 315 | $avoid_nlink = $follow || $File::Find::dont_use_nlink; |
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| 316 | |
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| 317 | if ( $untaint ) { |
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| 318 | $cwd_untainted= $1 if $cwd_untainted =~ m|$untaint_pat|; |
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| 319 | die "insecure cwd in find(depth)" unless defined($cwd_untainted); |
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[10723] | 320 | } |
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[14544] | 321 | |
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| 322 | my ($abs_dir, $Is_Dir); |
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[10723] | 323 | |
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[14544] | 324 | Proc_Top_Item: |
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| 325 | foreach my $TOP (@_) { |
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| 326 | my $top_item = $TOP; |
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| 327 | $top_item =~ s|/\z|| unless $top_item eq '/'; |
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| 328 | $Is_Dir= 0; |
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| 329 | |
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| 330 | ($topdev,$topino,$topmode,$topnlink) = stat $top_item; |
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[10723] | 331 | |
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[14544] | 332 | if ($follow) { |
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| 333 | if (substr($top_item,0,1) eq '/') { |
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| 334 | $abs_dir = $top_item; |
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| 335 | } |
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| 336 | elsif ($top_item eq '.') { |
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| 337 | $abs_dir = $cwd; |
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| 338 | } |
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| 339 | else { # care about any ../ |
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| 340 | $abs_dir = contract_name("$cwd/",$top_item); |
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| 341 | } |
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| 342 | $abs_dir= Follow_SymLink($abs_dir); |
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| 343 | unless (defined $abs_dir) { |
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| 344 | warn "$top_item is a dangling symbolic link\n"; |
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| 345 | next Proc_Top_Item; |
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| 346 | } |
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| 347 | if (-d _) { |
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| 348 | _find_dir_symlnk($wanted, $abs_dir, $top_item); |
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| 349 | $Is_Dir= 1; |
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| 350 | } |
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| 351 | } |
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| 352 | else { # no follow |
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| 353 | $topdir = $top_item; |
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| 354 | unless (defined $topnlink) { |
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| 355 | warn "Can't stat $top_item: $!\n"; |
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| 356 | next Proc_Top_Item; |
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| 357 | } |
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| 358 | if (-d _) { |
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| 359 | $top_item =~ s/\.dir\z// if $Is_VMS; |
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| 360 | _find_dir($wanted, $top_item, $topnlink); |
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| 361 | $Is_Dir= 1; |
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| 362 | } |
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| 363 | else { |
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| 364 | $abs_dir= $top_item; |
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| 365 | } |
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| 366 | } |
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[10723] | 367 | |
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[14544] | 368 | unless ($Is_Dir) { |
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| 369 | unless (($_,$dir) = File::Basename::fileparse($abs_dir)) { |
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| 370 | ($dir,$_) = ('./', $top_item); |
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| 371 | } |
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[10723] | 372 | |
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[14544] | 373 | $abs_dir = $dir; |
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| 374 | if ($untaint) { |
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| 375 | my $abs_dir_save = $abs_dir; |
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| 376 | $abs_dir = $1 if $abs_dir =~ m|$untaint_pat|; |
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| 377 | unless (defined $abs_dir) { |
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| 378 | if ($untaint_skip == 0) { |
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| 379 | die "directory $abs_dir_save is still tainted"; |
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[10723] | 380 | } |
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[14544] | 381 | else { |
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| 382 | next Proc_Top_Item; |
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| 383 | } |
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[10723] | 384 | } |
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[14544] | 385 | } |
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| 386 | |
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| 387 | unless ($no_chdir or chdir $abs_dir) { |
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| 388 | warn "Couldn't chdir $abs_dir: $!\n"; |
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| 389 | next Proc_Top_Item; |
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| 390 | } |
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| 391 | |
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| 392 | $name = $abs_dir . $_; |
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| 393 | |
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[17034] | 394 | { &$wanted_callback }; # protect against wild "next" |
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[14544] | 395 | |
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| 396 | } |
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| 397 | |
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| 398 | $no_chdir or chdir $cwd_untainted; |
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[10723] | 399 | } |
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| 400 | } |
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| 401 | |
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[14544] | 402 | # API: |
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| 403 | # $wanted |
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| 404 | # $p_dir : "parent directory" |
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| 405 | # $nlink : what came back from the stat |
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| 406 | # preconditions: |
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| 407 | # chdir (if not no_chdir) to dir |
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[10723] | 408 | |
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[14544] | 409 | sub _find_dir($$$) { |
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| 410 | my ($wanted, $p_dir, $nlink) = @_; |
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| 411 | my ($CdLvl,$Level) = (0,0); |
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| 412 | my @Stack; |
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| 413 | my @filenames; |
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| 414 | my ($subcount,$sub_nlink); |
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| 415 | my $SE= []; |
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| 416 | my $dir_name= $p_dir; |
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| 417 | my $dir_pref= ( $p_dir eq '/' ? '/' : "$p_dir/" ); |
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| 418 | my $dir_rel= '.'; # directory name relative to current directory |
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[10723] | 419 | |
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[14544] | 420 | local ($dir, $name, $prune, *DIR); |
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| 421 | |
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| 422 | unless ($no_chdir or $p_dir eq '.') { |
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| 423 | my $udir = $p_dir; |
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| 424 | if ($untaint) { |
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| 425 | $udir = $1 if $p_dir =~ m|$untaint_pat|; |
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| 426 | unless (defined $udir) { |
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| 427 | if ($untaint_skip == 0) { |
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| 428 | die "directory $p_dir is still tainted"; |
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| 429 | } |
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| 430 | else { |
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| 431 | return; |
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| 432 | } |
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| 433 | } |
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| 434 | } |
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| 435 | unless (chdir $udir) { |
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| 436 | warn "Can't cd to $udir: $!\n"; |
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| 437 | return; |
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| 438 | } |
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| 439 | } |
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| 440 | |
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| 441 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; |
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[10723] | 442 | |
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[14544] | 443 | while (defined $SE) { |
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| 444 | unless ($bydepth) { |
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| 445 | $dir= $p_dir; |
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| 446 | $name= $dir_name; |
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| 447 | $_= ($no_chdir ? $dir_name : $dir_rel ); |
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| 448 | # prune may happen here |
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| 449 | $prune= 0; |
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[17034] | 450 | { &$wanted_callback }; # protect against wild "next" |
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[14544] | 451 | next if $prune; |
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| 452 | } |
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| 453 | |
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| 454 | # change to that directory |
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| 455 | unless ($no_chdir or $dir_rel eq '.') { |
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| 456 | my $udir= $dir_rel; |
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| 457 | if ($untaint) { |
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| 458 | $udir = $1 if $dir_rel =~ m|$untaint_pat|; |
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| 459 | unless (defined $udir) { |
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| 460 | if ($untaint_skip == 0) { |
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| 461 | die "directory (" |
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| 462 | . ($p_dir ne '/' ? $p_dir : '') |
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| 463 | . "/) $dir_rel is still tainted"; |
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| 464 | } |
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| 465 | } |
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[10723] | 466 | } |
---|
[14544] | 467 | unless (chdir $udir) { |
---|
| 468 | warn "Can't cd to (" |
---|
| 469 | . ($p_dir ne '/' ? $p_dir : '') |
---|
| 470 | . "/) $udir : $!\n"; |
---|
| 471 | next; |
---|
[10723] | 472 | } |
---|
[14544] | 473 | $CdLvl++; |
---|
[10723] | 474 | } |
---|
[14544] | 475 | |
---|
| 476 | $dir= $dir_name; |
---|
| 477 | |
---|
| 478 | # Get the list of files in the current directory. |
---|
| 479 | unless (opendir DIR, ($no_chdir ? $dir_name : '.')) { |
---|
| 480 | warn "Can't opendir($dir_name): $!\n"; |
---|
| 481 | next; |
---|
| 482 | } |
---|
| 483 | @filenames = readdir DIR; |
---|
| 484 | closedir(DIR); |
---|
[17034] | 485 | @filenames = &$pre_process(@filenames) if $pre_process; |
---|
| 486 | push @Stack,[$CdLvl,$dir_name,"",-2] if $post_process; |
---|
[14544] | 487 | |
---|
| 488 | if ($nlink == 2 && !$avoid_nlink) { |
---|
| 489 | # This dir has no subdirectories. |
---|
| 490 | for my $FN (@filenames) { |
---|
| 491 | next if $FN =~ /^\.{1,2}\z/; |
---|
| 492 | |
---|
| 493 | $name = $dir_pref . $FN; |
---|
| 494 | $_ = ($no_chdir ? $name : $FN); |
---|
[17034] | 495 | { &$wanted_callback }; # protect against wild "next" |
---|
[14544] | 496 | } |
---|
| 497 | |
---|
| 498 | } |
---|
[10723] | 499 | else { |
---|
[14544] | 500 | # This dir has subdirectories. |
---|
| 501 | $subcount = $nlink - 2; |
---|
| 502 | |
---|
| 503 | for my $FN (@filenames) { |
---|
| 504 | next if $FN =~ /^\.{1,2}\z/; |
---|
| 505 | if ($subcount > 0 || $avoid_nlink) { |
---|
| 506 | # Seen all the subdirs? |
---|
| 507 | # check for directoriness. |
---|
| 508 | # stat is faster for a file in the current directory |
---|
| 509 | $sub_nlink = (lstat ($no_chdir ? $dir_pref . $FN : $FN))[3]; |
---|
| 510 | |
---|
| 511 | if (-d _) { |
---|
| 512 | --$subcount; |
---|
| 513 | $FN =~ s/\.dir\z// if $Is_VMS; |
---|
| 514 | push @Stack,[$CdLvl,$dir_name,$FN,$sub_nlink]; |
---|
| 515 | } |
---|
| 516 | else { |
---|
| 517 | $name = $dir_pref . $FN; |
---|
| 518 | $_= ($no_chdir ? $name : $FN); |
---|
[17034] | 519 | { &$wanted_callback }; # protect against wild "next" |
---|
[14544] | 520 | } |
---|
| 521 | } |
---|
| 522 | else { |
---|
| 523 | $name = $dir_pref . $FN; |
---|
| 524 | $_= ($no_chdir ? $name : $FN); |
---|
[17034] | 525 | { &$wanted_callback }; # protect against wild "next" |
---|
[14544] | 526 | } |
---|
[10723] | 527 | } |
---|
| 528 | } |
---|
| 529 | } |
---|
[14544] | 530 | continue { |
---|
| 531 | while ( defined ($SE = pop @Stack) ) { |
---|
| 532 | ($Level, $p_dir, $dir_rel, $nlink) = @$SE; |
---|
| 533 | if ($CdLvl > $Level && !$no_chdir) { |
---|
| 534 | my $tmp = join('/',('..') x ($CdLvl-$Level)); |
---|
| 535 | die "Can't cd to $dir_name" . $tmp |
---|
| 536 | unless chdir ($tmp); |
---|
| 537 | $CdLvl = $Level; |
---|
| 538 | } |
---|
| 539 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); |
---|
| 540 | $dir_pref = "$dir_name/"; |
---|
[17034] | 541 | if ( $nlink == -2 ) { |
---|
| 542 | $name = $dir = $p_dir; |
---|
| 543 | $_ = "."; |
---|
| 544 | &$post_process; # End-of-directory processing |
---|
| 545 | } elsif ( $nlink < 0 ) { # must be finddepth, report dirname now |
---|
[14544] | 546 | $name = $dir_name; |
---|
| 547 | if ( substr($name,-2) eq '/.' ) { |
---|
| 548 | $name =~ s|/\.$||; |
---|
| 549 | } |
---|
| 550 | $dir = $p_dir; |
---|
| 551 | $_ = ($no_chdir ? $dir_name : $dir_rel ); |
---|
| 552 | if ( substr($_,-2) eq '/.' ) { |
---|
| 553 | s|/\.$||; |
---|
| 554 | } |
---|
[17034] | 555 | { &$wanted_callback }; # protect against wild "next" |
---|
[14544] | 556 | } else { |
---|
| 557 | push @Stack,[$CdLvl,$p_dir,$dir_rel,-1] if $bydepth; |
---|
| 558 | last; |
---|
| 559 | } |
---|
| 560 | } |
---|
| 561 | } |
---|
[10723] | 562 | } |
---|
| 563 | |
---|
| 564 | |
---|
[14544] | 565 | # API: |
---|
| 566 | # $wanted |
---|
| 567 | # $dir_loc : absolute location of a dir |
---|
| 568 | # $p_dir : "parent directory" |
---|
| 569 | # preconditions: |
---|
| 570 | # chdir (if not no_chdir) to dir |
---|
[10723] | 571 | |
---|
[14544] | 572 | sub _find_dir_symlnk($$$) { |
---|
| 573 | my ($wanted, $dir_loc, $p_dir) = @_; |
---|
| 574 | my @Stack; |
---|
| 575 | my @filenames; |
---|
| 576 | my $new_loc; |
---|
| 577 | my $pdir_loc = $dir_loc; |
---|
| 578 | my $SE = []; |
---|
| 579 | my $dir_name = $p_dir; |
---|
| 580 | my $dir_pref = ( $p_dir eq '/' ? '/' : "$p_dir/" ); |
---|
| 581 | my $loc_pref = ( $dir_loc eq '/' ? '/' : "$dir_loc/" ); |
---|
| 582 | my $dir_rel = '.'; # directory name relative to current directory |
---|
| 583 | my $byd_flag; # flag for pending stack entry if $bydepth |
---|
| 584 | |
---|
| 585 | local ($dir, $name, $fullname, $prune, *DIR); |
---|
| 586 | |
---|
| 587 | unless ($no_chdir or $p_dir eq '.') { |
---|
| 588 | my $udir = $dir_loc; |
---|
| 589 | if ($untaint) { |
---|
| 590 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
---|
| 591 | unless (defined $udir) { |
---|
| 592 | if ($untaint_skip == 0) { |
---|
| 593 | die "directory $dir_loc is still tainted"; |
---|
| 594 | } |
---|
| 595 | else { |
---|
| 596 | return; |
---|
| 597 | } |
---|
| 598 | } |
---|
[10723] | 599 | } |
---|
[14544] | 600 | unless (chdir $udir) { |
---|
| 601 | warn "Can't cd to $udir: $!\n"; |
---|
| 602 | return; |
---|
| 603 | } |
---|
[10723] | 604 | } |
---|
| 605 | |
---|
[14544] | 606 | push @Stack,[$dir_loc,$pdir_loc,$p_dir,$dir_rel,-1] if $bydepth; |
---|
[10723] | 607 | |
---|
[14544] | 608 | while (defined $SE) { |
---|
[10723] | 609 | |
---|
[14544] | 610 | unless ($bydepth) { |
---|
[17034] | 611 | # change to parent directory |
---|
| 612 | unless ($no_chdir) { |
---|
| 613 | my $udir = $pdir_loc; |
---|
| 614 | if ($untaint) { |
---|
| 615 | $udir = $1 if $pdir_loc =~ m|$untaint_pat|; |
---|
| 616 | } |
---|
| 617 | unless (chdir $udir) { |
---|
| 618 | warn "Can't cd to $udir: $!\n"; |
---|
| 619 | next; |
---|
| 620 | } |
---|
| 621 | } |
---|
[14544] | 622 | $dir= $p_dir; |
---|
| 623 | $name= $dir_name; |
---|
| 624 | $_= ($no_chdir ? $dir_name : $dir_rel ); |
---|
| 625 | $fullname= $dir_loc; |
---|
| 626 | # prune may happen here |
---|
| 627 | $prune= 0; |
---|
[17034] | 628 | lstat($_); # make sure file tests with '_' work |
---|
| 629 | { &$wanted_callback }; # protect against wild "next" |
---|
[14544] | 630 | next if $prune; |
---|
| 631 | } |
---|
[10723] | 632 | |
---|
[14544] | 633 | # change to that directory |
---|
| 634 | unless ($no_chdir or $dir_rel eq '.') { |
---|
| 635 | my $udir = $dir_loc; |
---|
| 636 | if ($untaint) { |
---|
| 637 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
---|
| 638 | unless (defined $udir ) { |
---|
| 639 | if ($untaint_skip == 0) { |
---|
| 640 | die "directory $dir_loc is still tainted"; |
---|
[10723] | 641 | } |
---|
[14544] | 642 | else { |
---|
| 643 | next; |
---|
| 644 | } |
---|
[10723] | 645 | } |
---|
| 646 | } |
---|
[14544] | 647 | unless (chdir $udir) { |
---|
| 648 | warn "Can't cd to $udir: $!\n"; |
---|
| 649 | next; |
---|
| 650 | } |
---|
[10723] | 651 | } |
---|
[14544] | 652 | |
---|
| 653 | $dir = $dir_name; |
---|
| 654 | |
---|
| 655 | # Get the list of files in the current directory. |
---|
| 656 | unless (opendir DIR, ($no_chdir ? $dir_loc : '.')) { |
---|
| 657 | warn "Can't opendir($dir_loc): $!\n"; |
---|
| 658 | next; |
---|
| 659 | } |
---|
| 660 | @filenames = readdir DIR; |
---|
| 661 | closedir(DIR); |
---|
| 662 | |
---|
| 663 | for my $FN (@filenames) { |
---|
| 664 | next if $FN =~ /^\.{1,2}\z/; |
---|
| 665 | |
---|
| 666 | # follow symbolic links / do an lstat |
---|
| 667 | $new_loc = Follow_SymLink($loc_pref.$FN); |
---|
| 668 | |
---|
| 669 | # ignore if invalid symlink |
---|
| 670 | next unless defined $new_loc; |
---|
| 671 | |
---|
| 672 | if (-d _) { |
---|
| 673 | push @Stack,[$new_loc,$dir_loc,$dir_name,$FN,1]; |
---|
| 674 | } |
---|
| 675 | else { |
---|
| 676 | $fullname = $new_loc; |
---|
| 677 | $name = $dir_pref . $FN; |
---|
| 678 | $_ = ($no_chdir ? $name : $FN); |
---|
[17034] | 679 | { &$wanted_callback }; # protect against wild "next" |
---|
[14544] | 680 | } |
---|
| 681 | } |
---|
| 682 | |
---|
[10723] | 683 | } |
---|
[14544] | 684 | continue { |
---|
| 685 | while (defined($SE = pop @Stack)) { |
---|
| 686 | ($dir_loc, $pdir_loc, $p_dir, $dir_rel, $byd_flag) = @$SE; |
---|
| 687 | $dir_name = ($p_dir eq '/' ? "/$dir_rel" : "$p_dir/$dir_rel"); |
---|
| 688 | $dir_pref = "$dir_name/"; |
---|
| 689 | $loc_pref = "$dir_loc/"; |
---|
| 690 | if ( $byd_flag < 0 ) { # must be finddepth, report dirname now |
---|
| 691 | unless ($no_chdir or $dir_rel eq '.') { |
---|
| 692 | my $udir = $pdir_loc; |
---|
| 693 | if ($untaint) { |
---|
| 694 | $udir = $1 if $dir_loc =~ m|$untaint_pat|; |
---|
| 695 | } |
---|
| 696 | unless (chdir $udir) { |
---|
| 697 | warn "Can't cd to $udir: $!\n"; |
---|
| 698 | next; |
---|
| 699 | } |
---|
| 700 | } |
---|
| 701 | $fullname = $dir_loc; |
---|
| 702 | $name = $dir_name; |
---|
| 703 | if ( substr($name,-2) eq '/.' ) { |
---|
| 704 | $name =~ s|/\.$||; |
---|
| 705 | } |
---|
| 706 | $dir = $p_dir; |
---|
| 707 | $_ = ($no_chdir ? $dir_name : $dir_rel); |
---|
| 708 | if ( substr($_,-2) eq '/.' ) { |
---|
| 709 | s|/\.$||; |
---|
| 710 | } |
---|
| 711 | |
---|
[17034] | 712 | lstat($_); # make sure file tests with '_' work |
---|
| 713 | { &$wanted_callback }; # protect against wild "next" |
---|
[14544] | 714 | } else { |
---|
| 715 | push @Stack,[$dir_loc, $pdir_loc, $p_dir, $dir_rel,-1] if $bydepth; |
---|
| 716 | last; |
---|
| 717 | } |
---|
| 718 | } |
---|
| 719 | } |
---|
[10723] | 720 | } |
---|
| 721 | |
---|
[14544] | 722 | |
---|
| 723 | sub wrap_wanted { |
---|
| 724 | my $wanted = shift; |
---|
| 725 | if ( ref($wanted) eq 'HASH' ) { |
---|
| 726 | if ( $wanted->{follow} || $wanted->{follow_fast}) { |
---|
| 727 | $wanted->{follow_skip} = 1 unless defined $wanted->{follow_skip}; |
---|
| 728 | } |
---|
| 729 | if ( $wanted->{untaint} ) { |
---|
| 730 | $wanted->{untaint_pattern} = qr|^([-+@\w./]+)$| |
---|
| 731 | unless defined $wanted->{untaint_pattern}; |
---|
| 732 | $wanted->{untaint_skip} = 0 unless defined $wanted->{untaint_skip}; |
---|
| 733 | } |
---|
| 734 | return $wanted; |
---|
| 735 | } |
---|
| 736 | else { |
---|
| 737 | return { wanted => $wanted }; |
---|
| 738 | } |
---|
| 739 | } |
---|
| 740 | |
---|
| 741 | sub find { |
---|
| 742 | my $wanted = shift; |
---|
| 743 | _find_opt(wrap_wanted($wanted), @_); |
---|
| 744 | %SLnkSeen= (); # free memory |
---|
| 745 | } |
---|
| 746 | |
---|
| 747 | sub finddepth { |
---|
| 748 | my $wanted = wrap_wanted(shift); |
---|
| 749 | $wanted->{bydepth} = 1; |
---|
| 750 | _find_opt($wanted, @_); |
---|
| 751 | %SLnkSeen= (); # free memory |
---|
| 752 | } |
---|
| 753 | |
---|
| 754 | # These are hard-coded for now, but may move to hint files. |
---|
| 755 | if ($^O eq 'VMS') { |
---|
| 756 | $Is_VMS = 1; |
---|
| 757 | $File::Find::dont_use_nlink = 1; |
---|
| 758 | } |
---|
| 759 | |
---|
| 760 | $File::Find::dont_use_nlink = 1 |
---|
[17034] | 761 | if $^O eq 'os2' || $^O eq 'dos' || $^O eq 'amigaos' || $^O eq 'MSWin32' || |
---|
| 762 | $^O eq 'cygwin' || $^O eq 'epoc'; |
---|
[14544] | 763 | |
---|
[10723] | 764 | # Set dont_use_nlink in your hint file if your system's stat doesn't |
---|
| 765 | # report the number of links in a directory as an indication |
---|
| 766 | # of the number of files. |
---|
| 767 | # See, e.g. hints/machten.sh for MachTen 2.2. |
---|
[14544] | 768 | unless ($File::Find::dont_use_nlink) { |
---|
| 769 | require Config; |
---|
| 770 | $File::Find::dont_use_nlink = 1 if ($Config::Config{'dont_use_nlink'}); |
---|
[10723] | 771 | } |
---|
| 772 | |
---|
| 773 | 1; |
---|