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1 | package File::Path; |
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2 | |
3 | =head1 NAME |
4 | |
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5 | File::Path - create or remove directory trees |
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6 | |
7 | =head1 SYNOPSIS |
8 | |
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9 | use File::Path; |
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10 | |
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11 | mkpath(['/foo/bar/baz', 'blurfl/quux'], 1, 0711); |
12 | rmtree(['foo/bar/baz', 'blurfl/quux'], 1, 1); |
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13 | |
14 | =head1 DESCRIPTION |
15 | |
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16 | The C<mkpath> function provides a convenient way to create directories, even |
17 | if your C<mkdir> kernel call won't create more than one level of directory at |
18 | a time. C<mkpath> takes three arguments: |
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19 | |
20 | =over 4 |
21 | |
22 | =item * |
23 | |
24 | the name of the path to create, or a reference |
25 | to a list of paths to create, |
26 | |
27 | =item * |
28 | |
29 | a boolean value, which if TRUE will cause C<mkpath> |
30 | to print the name of each directory as it is created |
31 | (defaults to FALSE), and |
32 | |
33 | =item * |
34 | |
35 | the numeric mode to use when creating the directories |
36 | (defaults to 0777) |
37 | |
38 | =back |
39 | |
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40 | It returns a list of all directories (including intermediates, determined |
41 | using the Unix '/' separator) created. |
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42 | |
43 | Similarly, the C<rmtree> function provides a convenient way to delete a |
44 | subtree from the directory structure, much like the Unix command C<rm -r>. |
45 | C<rmtree> takes three arguments: |
46 | |
47 | =over 4 |
48 | |
49 | =item * |
50 | |
51 | the root of the subtree to delete, or a reference to |
52 | a list of roots. All of the files and directories |
53 | below each root, as well as the roots themselves, |
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54 | will be deleted. |
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55 | |
56 | =item * |
57 | |
58 | a boolean value, which if TRUE will cause C<rmtree> to |
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59 | print a message each time it examines a file, giving the |
60 | name of the file, and indicating whether it's using C<rmdir> |
61 | or C<unlink> to remove it, or that it's skipping it. |
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62 | (defaults to FALSE) |
63 | |
64 | =item * |
65 | |
66 | a boolean value, which if TRUE will cause C<rmtree> to |
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67 | skip any files to which you do not have delete access |
68 | (if running under VMS) or write access (if running |
69 | under another OS). This will change in the future when |
70 | a criterion for 'delete permission' under OSs other |
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71 | than VMS is settled. (defaults to FALSE) |
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72 | |
73 | =back |
74 | |
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75 | It returns the number of files successfully deleted. Symlinks are |
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76 | simply deleted and not followed. |
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77 | |
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78 | B<NOTE:> If the third parameter is not TRUE, C<rmtree> is B<unsecure> |
79 | in the face of failure or interruption. Files and directories which |
80 | were not deleted may be left with permissions reset to allow world |
81 | read and write access. Note also that the occurrence of errors in |
82 | rmtree can be determined I<only> by trapping diagnostic messages |
83 | using C<$SIG{__WARN__}>; it is not apparent from the return value. |
84 | Therefore, you must be extremely careful about using C<rmtree($foo,$bar,0> |
85 | in situations where security is an issue. |
86 | |
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87 | =head1 AUTHORS |
88 | |
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89 | Tim Bunce <F<Tim.Bunce@ig.co.uk>> and |
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90 | Charles Bailey <F<bailey@newman.upenn.edu>> |
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91 | |
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92 | =cut |
93 | |
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94 | use 5.006; |
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95 | use Carp; |
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96 | use File::Basename (); |
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97 | use Exporter (); |
98 | use strict; |
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99 | use warnings; |
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100 | |
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101 | our $VERSION = "1.05"; |
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102 | our @ISA = qw( Exporter ); |
103 | our @EXPORT = qw( mkpath rmtree ); |
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104 | |
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105 | my $Is_VMS = $^O eq 'VMS'; |
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106 | my $Is_MacOS = $^O eq 'MacOS'; |
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107 | |
108 | # These OSes complain if you want to remove a file that you have no |
109 | # write permission to: |
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110 | my $force_writeable = ($^O eq 'os2' || $^O eq 'dos' || $^O eq 'MSWin32' || |
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111 | $^O eq 'amigaos' || $^O eq 'MacOS' || $^O eq 'epoc'); |
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112 | |
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113 | sub mkpath { |
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114 | my($paths, $verbose, $mode) = @_; |
115 | # $paths -- either a path string or ref to list of paths |
116 | # $verbose -- optional print "mkdir $path" for each directory created |
117 | # $mode -- optional permissions, defaults to 0777 |
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118 | local($")=$Is_MacOS ? ":" : "/"; |
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119 | $mode = 0777 unless defined($mode); |
120 | $paths = [$paths] unless ref $paths; |
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121 | my(@created,$path); |
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122 | foreach $path (@$paths) { |
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123 | $path .= '/' if $^O eq 'os2' and $path =~ /^\w:\z/s; # feature of CRT |
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124 | # Logic wants Unix paths, so go with the flow. |
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125 | if ($Is_VMS) { |
126 | next if $path eq '/'; |
127 | $path = VMS::Filespec::unixify($path); |
128 | if ($path =~ m:^(/[^/]+)/?\z:) { |
129 | $path = $1.'/000000'; |
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130 | } |
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131 | } |
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132 | next if -d $path; |
133 | my $parent = File::Basename::dirname($path); |
134 | unless (-d $parent or $path eq $parent) { |
135 | push(@created,mkpath($parent, $verbose, $mode)); |
136 | } |
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137 | print "mkdir $path\n" if $verbose; |
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138 | unless (mkdir($path,$mode)) { |
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139 | my $e = $!; |
140 | # allow for another process to have created it meanwhile |
141 | croak "mkdir $path: $e" unless -d $path; |
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142 | } |
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143 | push(@created, $path); |
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144 | } |
145 | @created; |
146 | } |
147 | |
148 | sub rmtree { |
149 | my($roots, $verbose, $safe) = @_; |
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150 | my(@files); |
151 | my($count) = 0; |
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152 | $verbose ||= 0; |
153 | $safe ||= 0; |
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154 | |
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155 | if ( defined($roots) && length($roots) ) { |
156 | $roots = [$roots] unless ref $roots; |
157 | } |
158 | else { |
159 | carp "No root path(s) specified\n"; |
160 | return 0; |
161 | } |
162 | |
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163 | my($root); |
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164 | foreach $root (@{$roots}) { |
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165 | if ($Is_MacOS) { |
166 | $root = ":$root" if $root !~ /:/; |
167 | $root =~ s#([^:])\z#$1:#; |
168 | } else { |
169 | $root =~ s#/\z##; |
170 | } |
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171 | (undef, undef, my $rp) = lstat $root or next; |
172 | $rp &= 07777; # don't forget setuid, setgid, sticky bits |
173 | if ( -d _ ) { |
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174 | # notabene: 0777 is for making readable in the first place, |
175 | # it's also intended to change it to writable in case we have |
176 | # to recurse in which case we are better than rm -rf for |
177 | # subtrees with strange permissions |
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178 | chmod(0777, ($Is_VMS ? VMS::Filespec::fileify($root) : $root)) |
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179 | or carp "Can't make directory $root read+writeable: $!" |
180 | unless $safe; |
181 | |
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182 | if (opendir my $d, $root) { |
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183 | no strict 'refs'; |
184 | if (!defined ${"\cTAINT"} or ${"\cTAINT"}) { |
185 | # Blindly untaint dir names |
186 | @files = map { /^(.*)$/s ; $1 } readdir $d; |
187 | } else { |
188 | @files = readdir $d; |
189 | } |
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190 | closedir $d; |
191 | } |
192 | else { |
193 | carp "Can't read $root: $!"; |
194 | @files = (); |
195 | } |
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196 | |
197 | # Deleting large numbers of files from VMS Files-11 filesystems |
198 | # is faster if done in reverse ASCIIbetical order |
199 | @files = reverse @files if $Is_VMS; |
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200 | ($root = VMS::Filespec::unixify($root)) =~ s#\.dir\z## if $Is_VMS; |
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201 | if ($Is_MacOS) { |
202 | @files = map("$root$_", @files); |
203 | } else { |
204 | @files = map("$root/$_", grep $_!~/^\.{1,2}\z/s,@files); |
205 | } |
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206 | $count += rmtree(\@files,$verbose,$safe); |
207 | if ($safe && |
208 | ($Is_VMS ? !&VMS::Filespec::candelete($root) : !-w $root)) { |
209 | print "skipped $root\n" if $verbose; |
210 | next; |
211 | } |
212 | chmod 0777, $root |
213 | or carp "Can't make directory $root writeable: $!" |
214 | if $force_writeable; |
215 | print "rmdir $root\n" if $verbose; |
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216 | if (rmdir $root) { |
217 | ++$count; |
218 | } |
219 | else { |
220 | carp "Can't remove directory $root: $!"; |
221 | chmod($rp, ($Is_VMS ? VMS::Filespec::fileify($root) : $root)) |
222 | or carp("and can't restore permissions to " |
223 | . sprintf("0%o",$rp) . "\n"); |
224 | } |
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225 | } |
226 | else { |
227 | if ($safe && |
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228 | ($Is_VMS ? !&VMS::Filespec::candelete($root) |
229 | : !(-l $root || -w $root))) |
230 | { |
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231 | print "skipped $root\n" if $verbose; |
232 | next; |
233 | } |
234 | chmod 0666, $root |
235 | or carp "Can't make file $root writeable: $!" |
236 | if $force_writeable; |
237 | print "unlink $root\n" if $verbose; |
238 | # delete all versions under VMS |
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239 | for (;;) { |
240 | unless (unlink $root) { |
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241 | carp "Can't unlink file $root: $!"; |
242 | if ($force_writeable) { |
243 | chmod $rp, $root |
244 | or carp("and can't restore permissions to " |
245 | . sprintf("0%o",$rp) . "\n"); |
246 | } |
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247 | last; |
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248 | } |
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249 | ++$count; |
250 | last unless $Is_VMS && lstat $root; |
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251 | } |
252 | } |
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253 | } |
254 | |
255 | $count; |
256 | } |
257 | |
258 | 1; |