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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 5.005_64; |
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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 | |
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100 | our $VERSION = "1.0403"; |
101 | our @ISA = qw( Exporter ); |
102 | our @EXPORT = qw( mkpath rmtree ); |
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103 | |
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104 | my $Is_VMS = $^O eq 'VMS'; |
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105 | |
106 | # These OSes complain if you want to remove a file that you have no |
107 | # write permission to: |
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108 | my $force_writeable = ($^O eq 'os2' || $^O eq 'dos' || $^O eq 'MSWin32' || |
109 | $^O eq 'amigaos' || $^O eq 'MacOS'); |
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110 | |
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111 | sub mkpath { |
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112 | my($paths, $verbose, $mode) = @_; |
113 | # $paths -- either a path string or ref to list of paths |
114 | # $verbose -- optional print "mkdir $path" for each directory created |
115 | # $mode -- optional permissions, defaults to 0777 |
116 | local($")="/"; |
117 | $mode = 0777 unless defined($mode); |
118 | $paths = [$paths] unless ref $paths; |
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119 | my(@created,$path); |
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120 | foreach $path (@$paths) { |
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121 | $path .= '/' if $^O eq 'os2' and $path =~ /^\w:\z/s; # feature of CRT |
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122 | # Logic wants Unix paths, so go with the flow. |
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123 | if ($Is_VMS) { |
124 | next if $path eq '/'; |
125 | $path = VMS::Filespec::unixify($path); |
126 | if ($path =~ m:^(/[^/]+)/?\z:) { |
127 | $path = $1.'/000000'; |
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128 | } |
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129 | } |
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130 | next if -d $path; |
131 | my $parent = File::Basename::dirname($path); |
132 | unless (-d $parent or $path eq $parent) { |
133 | push(@created,mkpath($parent, $verbose, $mode)); |
134 | } |
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135 | print "mkdir $path\n" if $verbose; |
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136 | unless (mkdir($path,$mode)) { |
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137 | my $e = $!; |
138 | # allow for another process to have created it meanwhile |
139 | croak "mkdir $path: $e" unless -d $path; |
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140 | } |
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141 | push(@created, $path); |
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142 | } |
143 | @created; |
144 | } |
145 | |
146 | sub rmtree { |
147 | my($roots, $verbose, $safe) = @_; |
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148 | my(@files); |
149 | my($count) = 0; |
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150 | $verbose ||= 0; |
151 | $safe ||= 0; |
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152 | |
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153 | if ( defined($roots) && length($roots) ) { |
154 | $roots = [$roots] unless ref $roots; |
155 | } |
156 | else { |
157 | carp "No root path(s) specified\n"; |
158 | return 0; |
159 | } |
160 | |
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161 | my($root); |
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162 | foreach $root (@{$roots}) { |
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163 | $root =~ s#/\z##; |
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164 | (undef, undef, my $rp) = lstat $root or next; |
165 | $rp &= 07777; # don't forget setuid, setgid, sticky bits |
166 | if ( -d _ ) { |
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167 | # notabene: 0777 is for making readable in the first place, |
168 | # it's also intended to change it to writable in case we have |
169 | # to recurse in which case we are better than rm -rf for |
170 | # subtrees with strange permissions |
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171 | chmod(0777, ($Is_VMS ? VMS::Filespec::fileify($root) : $root)) |
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172 | or carp "Can't make directory $root read+writeable: $!" |
173 | unless $safe; |
174 | |
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175 | if (opendir my $d, $root) { |
176 | @files = readdir $d; |
177 | closedir $d; |
178 | } |
179 | else { |
180 | carp "Can't read $root: $!"; |
181 | @files = (); |
182 | } |
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183 | |
184 | # Deleting large numbers of files from VMS Files-11 filesystems |
185 | # is faster if done in reverse ASCIIbetical order |
186 | @files = reverse @files if $Is_VMS; |
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187 | ($root = VMS::Filespec::unixify($root)) =~ s#\.dir\z## if $Is_VMS; |
188 | @files = map("$root/$_", grep $_!~/^\.{1,2}\z/s,@files); |
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189 | $count += rmtree(\@files,$verbose,$safe); |
190 | if ($safe && |
191 | ($Is_VMS ? !&VMS::Filespec::candelete($root) : !-w $root)) { |
192 | print "skipped $root\n" if $verbose; |
193 | next; |
194 | } |
195 | chmod 0777, $root |
196 | or carp "Can't make directory $root writeable: $!" |
197 | if $force_writeable; |
198 | print "rmdir $root\n" if $verbose; |
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199 | if (rmdir $root) { |
200 | ++$count; |
201 | } |
202 | else { |
203 | carp "Can't remove directory $root: $!"; |
204 | chmod($rp, ($Is_VMS ? VMS::Filespec::fileify($root) : $root)) |
205 | or carp("and can't restore permissions to " |
206 | . sprintf("0%o",$rp) . "\n"); |
207 | } |
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208 | } |
209 | else { |
210 | if ($safe && |
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211 | ($Is_VMS ? !&VMS::Filespec::candelete($root) |
212 | : !(-l $root || -w $root))) |
213 | { |
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214 | print "skipped $root\n" if $verbose; |
215 | next; |
216 | } |
217 | chmod 0666, $root |
218 | or carp "Can't make file $root writeable: $!" |
219 | if $force_writeable; |
220 | print "unlink $root\n" if $verbose; |
221 | # delete all versions under VMS |
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222 | for (;;) { |
223 | unless (unlink $root) { |
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224 | carp "Can't unlink file $root: $!"; |
225 | if ($force_writeable) { |
226 | chmod $rp, $root |
227 | or carp("and can't restore permissions to " |
228 | . sprintf("0%o",$rp) . "\n"); |
229 | } |
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230 | last; |
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231 | } |
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232 | ++$count; |
233 | last unless $Is_VMS && lstat $root; |
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234 | } |
235 | } |
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236 | } |
237 | |
238 | $count; |
239 | } |
240 | |
241 | 1; |