Profile of /usr/local/lib/perl5/5.10.1/File/Spec/Unix.pm

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For 01.HTTP.t
Run on Tue May 4 15:25:55 2010
Reported on Tue May 4 15:26:13 2010

File | /usr/local/lib/perl5/5.10.1/File/Spec/Unix.pm
Statements Executed | 13
Statement Execution Time | 1.32ms

Subroutines — ordered by exclusive time
Calls | P | F | Exclusive Time | Inclusive Time | Subroutine
--- | --- | --- | --- | --- | ---
1 | 1 | 1 | 22µs | 25µs | File::Spec::Unix::::BEGIN@3File::Spec::Unix::BEGIN@3
1 | 1 | 1 | 8µs | 19µs | File::Spec::Unix::::BEGIN@149File::Spec::Unix::BEGIN@149
1 | 1 | 1 | 6µs | 25µs | File::Spec::Unix::::BEGIN@4File::Spec::Unix::BEGIN@4
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::_collapseFile::Spec::Unix::_collapse
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::_cwdFile::Spec::Unix::_cwd
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::_sameFile::Spec::Unix::_same
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::_tmpdirFile::Spec::Unix::_tmpdir
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::abs2relFile::Spec::Unix::abs2rel
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::canonpathFile::Spec::Unix::canonpath
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::case_tolerantFile::Spec::Unix::case_tolerant
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::catdirFile::Spec::Unix::catdir
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::catfileFile::Spec::Unix::catfile
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::catpathFile::Spec::Unix::catpath
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::curdirFile::Spec::Unix::curdir
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::devnullFile::Spec::Unix::devnull
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::file_name_is_absoluteFile::Spec::Unix::file_name_is_absolute
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::joinFile::Spec::Unix::join
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::no_upwardsFile::Spec::Unix::no_upwards
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::pathFile::Spec::Unix::path
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::rel2absFile::Spec::Unix::rel2abs
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::rootdirFile::Spec::Unix::rootdir
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::splitdirFile::Spec::Unix::splitdir
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::splitpathFile::Spec::Unix::splitpath
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::tmpdirFile::Spec::Unix::tmpdir
0 | 0 | 0 | 0s | 0s | File::Spec::Unix::::updirFile::Spec::Unix::updir

Call graph for these subroutines as a Graphviz dot language file.

Line | State ments | Time on line | Calls | Time in subs | Code
--- | --- | --- | --- | --- | ---
1 |  |  |  |  | package File::Spec::Unix;
2 |  |  |  |  |
3 | 3 | 25µs | 2 | 29µs | # spent 25µs (22+3) within File::Spec::Unix::BEGIN@3 which was called # once (22µs+3µs) by IO::File::BEGIN@134 at line 3 use strict; # spent 25µs making 1 call to File::Spec::Unix::BEGIN@3 # spent 4µs making 1 call to strict::import
4 | 3 | 318µs | 2 | 44µs | # spent 25µs (6+19) within File::Spec::Unix::BEGIN@4 which was called # once (6µs+19µs) by IO::File::BEGIN@134 at line 4 use vars qw($VERSION); # spent 25µs making 1 call to File::Spec::Unix::BEGIN@4 # spent 19µs making 1 call to vars::import
5 |  |  |  |  |
6 | 1 | 700ns |  |  | $VERSION = '3.30';
7 | 1 | 14µs |  |  | $VERSION = eval $VERSION;
8 |  |  |  |  |
9 |  |  |  |  | =head1 NAME
10 |  |  |  |  |
11 |  |  |  |  | File::Spec::Unix - File::Spec for Unix, base for other File::Spec modules
12 |  |  |  |  |
13 |  |  |  |  | =head1 SYNOPSIS
14 |  |  |  |  |
15 |  |  |  |  | require File::Spec::Unix; # Done automatically by File::Spec
16 |  |  |  |  |
17 |  |  |  |  | =head1 DESCRIPTION
18 |  |  |  |  |
19 |  |  |  |  | Methods for manipulating file specifications. Other File::Spec
20 |  |  |  |  | modules, such as File::Spec::Mac, inherit from File::Spec::Unix and
21 |  |  |  |  | override specific methods.
22 |  |  |  |  |
23 |  |  |  |  | =head1 METHODS
24 |  |  |  |  |
25 |  |  |  |  | =over 2
26 |  |  |  |  |
27 |  |  |  |  | =item canonpath()
28 |  |  |  |  |
29 |  |  |  |  | No physical check on the filesystem, but a logical cleanup of a
30 |  |  |  |  | path. On UNIX eliminates successive slashes and successive "/.".
31 |  |  |  |  |
32 |  |  |  |  | $cpath = File::Spec->canonpath( $path ) ;
33 |  |  |  |  |
34 |  |  |  |  | Note that this does *not* collapse F<x/../y> sections into F<y>. This
35 |  |  |  |  | is by design. If F</foo> on your system is a symlink to F</bar/baz>,
36 |  |  |  |  | then F</foo/../quux> is actually F</bar/quux>, not F</quux> as a naive
37 |  |  |  |  | F<../>-removal would give you. If you want to do this kind of
38 |  |  |  |  | processing, you probably want C<Cwd>'s C<realpath()> function to
39 |  |  |  |  | actually traverse the filesystem cleaning up paths like this.
40 |  |  |  |  |
41 |  |  |  |  | =cut
42 |  |  |  |  |
43 |  |  |  |  | sub canonpath {
44 |  |  |  |  | my ($self,$path) = @_;
45 |  |  |  |  | return unless defined $path;
46 |  |  |  |  |
47 |  |  |  |  | # Handle POSIX-style node names beginning with double slash (qnx, nto)
48 |  |  |  |  | # (POSIX says: "a pathname that begins with two successive slashes
49 |  |  |  |  | # may be interpreted in an implementation-defined manner, although
50 |  |  |  |  | # more than two leading slashes shall be treated as a single slash.")
51 |  |  |  |  | my $node = '';
52 |  |  |  |  | my $double_slashes_special = $^O eq 'qnx' || $^O eq 'nto';
53 |  |  |  |  |
54 |  |  |  |  |
55 |  |  |  |  | if ( $double_slashes_special
56 |  |  |  |  | && ( $path =~ s{^(//[^/]+)/?\z}{}s || $path =~ s{^(//[^/]+)/}{/}s ) ) {
57 |  |  |  |  | $node = $1;
58 |  |  |  |  | }
59 |  |  |  |  | # This used to be
60 |  |  |  |  | # $path =~ s|/+|/|g unless ($^O eq 'cygwin');
61 |  |  |  |  | # but that made tests 29, 30, 35, 46, and 213 (as of #13272) to fail
62 |  |  |  |  | # (Mainly because trailing "" directories didn't get stripped).
63 |  |  |  |  | # Why would cygwin avoid collapsing multiple slashes into one? --jhi
64 |  |  |  |  | $path =~ s|/{2,}|/|g; # xx////xx -> xx/xx
65 |  |  |  |  | $path =~ s{(?:/\.)+(?:/|\z)}{/}g; # xx/././xx -> xx/xx
66 |  |  |  |  | $path =~ s|^(?:\./)+||s unless $path eq "./"; # ./xx -> xx
67 |  |  |  |  | $path =~ s|^/(?:\.\./)+|/|; # /../../xx -> xx
68 |  |  |  |  | $path =~ s|^/\.\.$|/|; # /.. -> /
69 |  |  |  |  | $path =~ s|/\z|| unless $path eq "/"; # xx/ -> xx
70 |  |  |  |  | return "$node$path";
71 |  |  |  |  | }
72 |  |  |  |  |
73 |  |  |  |  | =item catdir()
74 |  |  |  |  |
75 |  |  |  |  | Concatenate two or more directory names to form a complete path ending
76 |  |  |  |  | with a directory. But remove the trailing slash from the resulting
77 |  |  |  |  | string, because it doesn't look good, isn't necessary and confuses
78 |  |  |  |  | OS2. Of course, if this is the root directory, don't cut off the
79 |  |  |  |  | trailing slash :-)
80 |  |  |  |  |
81 |  |  |  |  | =cut
82 |  |  |  |  |
83 |  |  |  |  | sub catdir {
84 |  |  |  |  | my $self = shift;
85 |  |  |  |  |
86 |  |  |  |  | $self->canonpath(join('/', @_, '')); # '' because need a trailing '/'
87 |  |  |  |  | }
88 |  |  |  |  |
89 |  |  |  |  | =item catfile
90 |  |  |  |  |
91 |  |  |  |  | Concatenate one or more directory names and a filename to form a
92 |  |  |  |  | complete path ending with a filename
93 |  |  |  |  |
94 |  |  |  |  | =cut
95 |  |  |  |  |
96 |  |  |  |  | sub catfile {
97 |  |  |  |  | my $self = shift;
98 |  |  |  |  | my $file = $self->canonpath(pop @_);
99 |  |  |  |  | return $file unless @_;
100 |  |  |  |  | my $dir = $self->catdir(@_);
101 |  |  |  |  | $dir .= "/" unless substr($dir,-1) eq "/";
102 |  |  |  |  | return $dir.$file;
103 |  |  |  |  | }
104 |  |  |  |  |
105 |  |  |  |  | =item curdir
106 |  |  |  |  |
107 |  |  |  |  | Returns a string representation of the current directory. "." on UNIX.
108 |  |  |  |  |
109 |  |  |  |  | =cut
110 |  |  |  |  |
111 |  |  |  |  | sub curdir { '.' }
112 |  |  |  |  |
113 |  |  |  |  | =item devnull
114 |  |  |  |  |
115 |  |  |  |  | Returns a string representation of the null device. "/dev/null" on UNIX.
116 |  |  |  |  |
117 |  |  |  |  | =cut
118 |  |  |  |  |
119 |  |  |  |  | sub devnull { '/dev/null' }
120 |  |  |  |  |
121 |  |  |  |  | =item rootdir
122 |  |  |  |  |
123 |  |  |  |  | Returns a string representation of the root directory. "/" on UNIX.
124 |  |  |  |  |
125 |  |  |  |  | =cut
126 |  |  |  |  |
127 |  |  |  |  | sub rootdir { '/' }
128 |  |  |  |  |
129 |  |  |  |  | =item tmpdir
130 |  |  |  |  |
131 |  |  |  |  | Returns a string representation of the first writable directory from
132 |  |  |  |  | the following list or the current directory if none from the list are
133 |  |  |  |  | writable:
134 |  |  |  |  |
135 |  |  |  |  | $ENV{TMPDIR}
136 |  |  |  |  | /tmp
137 |  |  |  |  |
138 |  |  |  |  | Since perl 5.8.0, if running under taint mode, and if $ENV{TMPDIR}
139 |  |  |  |  | is tainted, it is not used.
140 |  |  |  |  |
141 |  |  |  |  | =cut
142 |  |  |  |  |
143 | 1 | 100ns |  |  | my $tmpdir;
144 |  |  |  |  | sub _tmpdir {
145 |  |  |  |  | return $tmpdir if defined $tmpdir;
146 |  |  |  |  | my $self = shift;
147 |  |  |  |  | my @dirlist = @_;
148 |  |  |  |  | {
149 | 3 | 956µs | 2 | 30µs | # spent 19µs (8+11) within File::Spec::Unix::BEGIN@149 which was called # once (8µs+11µs) by IO::File::BEGIN@134 at line 149 no strict 'refs'; # spent 19µs making 1 call to File::Spec::Unix::BEGIN@149 # spent 11µs making 1 call to strict::unimport
150 |  |  |  |  | if (${"\cTAINT"}) { # Check for taint mode on perl >= 5.8.0
151 |  |  |  |  | require Scalar::Util;
152 |  |  |  |  | @dirlist = grep { ! Scalar::Util::tainted($_) } @dirlist;
153 |  |  |  |  | }
154 |  |  |  |  | }
155 |  |  |  |  | foreach (@dirlist) {
156 |  |  |  |  | next unless defined && -d && -w _;
157 |  |  |  |  | $tmpdir = $_;
158 |  |  |  |  | last;
159 |  |  |  |  | }
160 |  |  |  |  | $tmpdir = $self->curdir unless defined $tmpdir;
161 |  |  |  |  | $tmpdir = defined $tmpdir && $self->canonpath($tmpdir);
162 |  |  |  |  | return $tmpdir;
163 |  |  |  |  | }
164 |  |  |  |  |
165 |  |  |  |  | sub tmpdir {
166 |  |  |  |  | return $tmpdir if defined $tmpdir;
167 |  |  |  |  | $tmpdir = $_[0]->_tmpdir( $ENV{TMPDIR}, "/tmp" );
168 |  |  |  |  | }
169 |  |  |  |  |
170 |  |  |  |  | =item updir
171 |  |  |  |  |
172 |  |  |  |  | Returns a string representation of the parent directory. ".." on UNIX.
173 |  |  |  |  |
174 |  |  |  |  | =cut
175 |  |  |  |  |
176 |  |  |  |  | sub updir { '..' }
177 |  |  |  |  |
178 |  |  |  |  | =item no_upwards
179 |  |  |  |  |
180 |  |  |  |  | Given a list of file names, strip out those that refer to a parent
181 |  |  |  |  | directory. (Does not strip symlinks, only '.', '..', and equivalents.)
182 |  |  |  |  |
183 |  |  |  |  | =cut
184 |  |  |  |  |
185 |  |  |  |  | sub no_upwards {
186 |  |  |  |  | my $self = shift;
187 |  |  |  |  | return grep(!/^\.{1,2}\z/s, @_);
188 |  |  |  |  | }
189 |  |  |  |  |
190 |  |  |  |  | =item case_tolerant
191 |  |  |  |  |
192 |  |  |  |  | Returns a true or false value indicating, respectively, that alphabetic
193 |  |  |  |  | is not or is significant when comparing file specifications.
194 |  |  |  |  |
195 |  |  |  |  | =cut
196 |  |  |  |  |
197 |  |  |  |  | sub case_tolerant { 0 }
198 |  |  |  |  |
199 |  |  |  |  | =item file_name_is_absolute
200 |  |  |  |  |
201 |  |  |  |  | Takes as argument a path and returns true if it is an absolute path.
202 |  |  |  |  |
203 |  |  |  |  | This does not consult the local filesystem on Unix, Win32, OS/2 or Mac
204 |  |  |  |  | OS (Classic). It does consult the working environment for VMS (see
205 |  |  |  |  | L<File::Spec::VMS/file_name_is_absolute>).
206 |  |  |  |  |
207 |  |  |  |  | =cut
208 |  |  |  |  |
209 |  |  |  |  | sub file_name_is_absolute {
210 |  |  |  |  | my ($self,$file) = @_;
211 |  |  |  |  | return scalar($file =~ m:^/:s);
212 |  |  |  |  | }
213 |  |  |  |  |
214 |  |  |  |  | =item path
215 |  |  |  |  |
216 |  |  |  |  | Takes no argument, returns the environment variable PATH as an array.
217 |  |  |  |  |
218 |  |  |  |  | =cut
219 |  |  |  |  |
220 |  |  |  |  | sub path {
221 |  |  |  |  | return () unless exists $ENV{PATH};
222 |  |  |  |  | my @path = split(':', $ENV{PATH});
223 |  |  |  |  | foreach (@path) { $_ = '.' if $_ eq '' }
224 |  |  |  |  | return @path;
225 |  |  |  |  | }
226 |  |  |  |  |
227 |  |  |  |  | =item join
228 |  |  |  |  |
229 |  |  |  |  | join is the same as catfile.
230 |  |  |  |  |
231 |  |  |  |  | =cut
232 |  |  |  |  |
233 |  |  |  |  | sub join {
234 |  |  |  |  | my $self = shift;
235 |  |  |  |  | return $self->catfile(@_);
236 |  |  |  |  | }
237 |  |  |  |  |
238 |  |  |  |  | =item splitpath
239 |  |  |  |  |
240 |  |  |  |  | ($volume,$directories,$file) = File::Spec->splitpath( $path );
241 |  |  |  |  | ($volume,$directories,$file) = File::Spec->splitpath( $path, $no_file );
242 |  |  |  |  |
243 |  |  |  |  | Splits a path into volume, directory, and filename portions. On systems
244 |  |  |  |  | with no concept of volume, returns '' for volume.
245 |  |  |  |  |
246 |  |  |  |  | For systems with no syntax differentiating filenames from directories,
247 |  |  |  |  | assumes that the last file is a path unless $no_file is true or a
248 |  |  |  |  | trailing separator or /. or /.. is present. On Unix this means that $no_file
249 |  |  |  |  | true makes this return ( '', $path, '' ).
250 |  |  |  |  |
251 |  |  |  |  | The directory portion may or may not be returned with a trailing '/'.
252 |  |  |  |  |
253 |  |  |  |  | The results can be passed to L</catpath()> to get back a path equivalent to
254 |  |  |  |  | (usually identical to) the original path.
255 |  |  |  |  |
256 |  |  |  |  | =cut
257 |  |  |  |  |
258 |  |  |  |  | sub splitpath {
259 |  |  |  |  | my ($self,$path, $nofile) = @_;
260 |  |  |  |  |
261 |  |  |  |  | my ($volume,$directory,$file) = ('','','');
262 |  |  |  |  |
263 |  |  |  |  | if ( $nofile ) {
264 |  |  |  |  | $directory = $path;
265 |  |  |  |  | }
266 |  |  |  |  | else {
267 |  |  |  |  | $path =~ m|^ ( (?: .* / (?: \.\.?\z )? )? ) ([^/]*) |xs;
268 |  |  |  |  | $directory = $1;
269 |  |  |  |  | $file = $2;
270 |  |  |  |  | }
271 |  |  |  |  |
272 |  |  |  |  | return ($volume,$directory,$file);
273 |  |  |  |  | }
274 |  |  |  |  |
275 |  |  |  |  |
276 |  |  |  |  | =item splitdir
277 |  |  |  |  |
278 |  |  |  |  | The opposite of L</catdir()>.
279 |  |  |  |  |
280 |  |  |  |  | @dirs = File::Spec->splitdir( $directories );
281 |  |  |  |  |
282 |  |  |  |  | $directories must be only the directory portion of the path on systems
283 |  |  |  |  | that have the concept of a volume or that have path syntax that differentiates
284 |  |  |  |  | files from directories.
285 |  |  |  |  |
286 |  |  |  |  | Unlike just splitting the directories on the separator, empty
287 |  |  |  |  | directory names (C<''>) can be returned, because these are significant
288 |  |  |  |  | on some OSs.
289 |  |  |  |  |
290 |  |  |  |  | On Unix,
291 |  |  |  |  |
292 |  |  |  |  | File::Spec->splitdir( "/a/b//c/" );
293 |  |  |  |  |
294 |  |  |  |  | Yields:
295 |  |  |  |  |
296 |  |  |  |  | ( '', 'a', 'b', '', 'c', '' )
297 |  |  |  |  |
298 |  |  |  |  | =cut
299 |  |  |  |  |
300 |  |  |  |  | sub splitdir {
301 |  |  |  |  | return split m|/|, $_[1], -1; # Preserve trailing fields
302 |  |  |  |  | }
303 |  |  |  |  |
304 |  |  |  |  |
305 |  |  |  |  | =item catpath()
306 |  |  |  |  |
307 |  |  |  |  | Takes volume, directory and file portions and returns an entire path. Under
308 |  |  |  |  | Unix, $volume is ignored, and directory and file are concatenated. A '/' is
309 |  |  |  |  | inserted if needed (though if the directory portion doesn't start with
310 |  |  |  |  | '/' it is not added). On other OSs, $volume is significant.
311 |  |  |  |  |
312 |  |  |  |  | =cut
313 |  |  |  |  |
314 |  |  |  |  | sub catpath {
315 |  |  |  |  | my ($self,$volume,$directory,$file) = @_;
316 |  |  |  |  |
317 |  |  |  |  | if ( $directory ne '' &&
318 |  |  |  |  | $file ne '' &&
319 |  |  |  |  | substr( $directory, -1 ) ne '/' &&
320 |  |  |  |  | substr( $file, 0, 1 ) ne '/'
321 |  |  |  |  | ) {
322 |  |  |  |  | $directory .= "/$file" ;
323 |  |  |  |  | }
324 |  |  |  |  | else {
325 |  |  |  |  | $directory .= $file ;
326 |  |  |  |  | }
327 |  |  |  |  |
328 |  |  |  |  | return $directory ;
329 |  |  |  |  | }
330 |  |  |  |  |
331 |  |  |  |  | =item abs2rel
332 |  |  |  |  |
333 |  |  |  |  | Takes a destination path and an optional base path returns a relative path
334 |  |  |  |  | from the base path to the destination path:
335 |  |  |  |  |
336 |  |  |  |  | $rel_path = File::Spec->abs2rel( $path ) ;
337 |  |  |  |  | $rel_path = File::Spec->abs2rel( $path, $base ) ;
338 |  |  |  |  |
339 |  |  |  |  | If $base is not present or '', then L<cwd()|Cwd> is used. If $base is
340 |  |  |  |  | relative, then it is converted to absolute form using
341 |  |  |  |  | L</rel2abs()>. This means that it is taken to be relative to
342 |  |  |  |  | L<cwd()|Cwd>.
343 |  |  |  |  |
344 |  |  |  |  | On systems that have a grammar that indicates filenames, this ignores the
345 |  |  |  |  | $base filename. Otherwise all path components are assumed to be
346 |  |  |  |  | directories.
347 |  |  |  |  |
348 |  |  |  |  | If $path is relative, it is converted to absolute form using L</rel2abs()>.
349 |  |  |  |  | This means that it is taken to be relative to L<cwd()|Cwd>.
350 |  |  |  |  |
351 |  |  |  |  | No checks against the filesystem are made. On VMS, there is
352 |  |  |  |  | interaction with the working environment, as logicals and
353 |  |  |  |  | macros are expanded.
354 |  |  |  |  |
355 |  |  |  |  | Based on code written by Shigio Yamaguchi.
356 |  |  |  |  |
357 |  |  |  |  | =cut
358 |  |  |  |  |
359 |  |  |  |  | sub abs2rel {
360 |  |  |  |  | my($self,$path,$base) = @_;
361 |  |  |  |  | $base = $self->_cwd() unless defined $base and length $base;
362 |  |  |  |  |
363 |  |  |  |  | ($path, $base) = map $self->canonpath($_), $path, $base;
364 |  |  |  |  |
365 |  |  |  |  | if (grep $self->file_name_is_absolute($_), $path, $base) {
366 |  |  |  |  | ($path, $base) = map $self->rel2abs($_), $path, $base;
367 |  |  |  |  | }
368 |  |  |  |  | else {
369 |  |  |  |  | # save a couple of cwd()s if both paths are relative
370 |  |  |  |  | ($path, $base) = map $self->catdir('/', $_), $path, $base;
371 |  |  |  |  | }
372 |  |  |  |  |
373 |  |  |  |  | my ($path_volume) = $self->splitpath($path, 1);
374 |  |  |  |  | my ($base_volume) = $self->splitpath($base, 1);
375 |  |  |  |  |
376 |  |  |  |  | # Can't relativize across volumes
377 |  |  |  |  | return $path unless $path_volume eq $base_volume;
378 |  |  |  |  |
379 |  |  |  |  | my $path_directories = ($self->splitpath($path, 1))[1];
380 |  |  |  |  | my $base_directories = ($self->splitpath($base, 1))[1];
381 |  |  |  |  |
382 |  |  |  |  | # For UNC paths, the user might give a volume like //foo/bar that
383 |  |  |  |  | # strictly speaking has no directory portion. Treat it as if it
384 |  |  |  |  | # had the root directory for that volume.
385 |  |  |  |  | if (!length($base_directories) and $self->file_name_is_absolute($base)) {
386 |  |  |  |  | $base_directories = $self->rootdir;
387 |  |  |  |  | }
388 |  |  |  |  |
389 |  |  |  |  | # Now, remove all leading components that are the same
390 |  |  |  |  | my @pathchunks = $self->splitdir( $path_directories );
391 |  |  |  |  | my @basechunks = $self->splitdir( $base_directories );
392 |  |  |  |  |
393 |  |  |  |  | if ($base_directories eq $self->rootdir) {
394 |  |  |  |  | shift @pathchunks;
395 |  |  |  |  | return $self->canonpath( $self->catpath('', $self->catdir( @pathchunks ), '') );
396 |  |  |  |  | }
397 |  |  |  |  |
398 |  |  |  |  | while (@pathchunks && @basechunks && $self->_same($pathchunks[0], $basechunks[0])) {
399 |  |  |  |  | shift @pathchunks ;
400 |  |  |  |  | shift @basechunks ;
401 |  |  |  |  | }
402 |  |  |  |  | return $self->curdir unless @pathchunks || @basechunks;
403 |  |  |  |  |
404 |  |  |  |  | # $base now contains the directories the resulting relative path
405 |  |  |  |  | # must ascend out of before it can descend to $path_directory.
406 |  |  |  |  | my $result_dirs = $self->catdir( ($self->updir) x @basechunks, @pathchunks );
407 |  |  |  |  | return $self->canonpath( $self->catpath('', $result_dirs, '') );
408 |  |  |  |  | }
409 |  |  |  |  |
410 |  |  |  |  | sub _same {
411 |  |  |  |  | $_[1] eq $_[2];
412 |  |  |  |  | }
413 |  |  |  |  |
414 |  |  |  |  | =item rel2abs()
415 |  |  |  |  |
416 |  |  |  |  | Converts a relative path to an absolute path.
417 |  |  |  |  |
418 |  |  |  |  | $abs_path = File::Spec->rel2abs( $path ) ;
419 |  |  |  |  | $abs_path = File::Spec->rel2abs( $path, $base ) ;
420 |  |  |  |  |
421 |  |  |  |  | If $base is not present or '', then L<cwd()|Cwd> is used. If $base is
422 |  |  |  |  | relative, then it is converted to absolute form using
423 |  |  |  |  | L</rel2abs()>. This means that it is taken to be relative to
424 |  |  |  |  | L<cwd()|Cwd>.
425 |  |  |  |  |
426 |  |  |  |  | On systems that have a grammar that indicates filenames, this ignores
427 |  |  |  |  | the $base filename. Otherwise all path components are assumed to be
428 |  |  |  |  | directories.
429 |  |  |  |  |
430 |  |  |  |  | If $path is absolute, it is cleaned up and returned using L</canonpath()>.
431 |  |  |  |  |
432 |  |  |  |  | No checks against the filesystem are made. On VMS, there is
433 |  |  |  |  | interaction with the working environment, as logicals and
434 |  |  |  |  | macros are expanded.
435 |  |  |  |  |
436 |  |  |  |  | Based on code written by Shigio Yamaguchi.
437 |  |  |  |  |
438 |  |  |  |  | =cut
439 |  |  |  |  |
440 |  |  |  |  | sub rel2abs {
441 |  |  |  |  | my ($self,$path,$base ) = @_;
442 |  |  |  |  |
443 |  |  |  |  | # Clean up $path
444 |  |  |  |  | if ( ! $self->file_name_is_absolute( $path ) ) {
445 |  |  |  |  | # Figure out the effective $base and clean it up.
446 |  |  |  |  | if ( !defined( $base ) || $base eq '' ) {
447 |  |  |  |  | $base = $self->_cwd();
448 |  |  |  |  | }
449 |  |  |  |  | elsif ( ! $self->file_name_is_absolute( $base ) ) {
450 |  |  |  |  | $base = $self->rel2abs( $base ) ;
451 |  |  |  |  | }
452 |  |  |  |  | else {
453 |  |  |  |  | $base = $self->canonpath( $base ) ;
454 |  |  |  |  | }
455 |  |  |  |  |
456 |  |  |  |  | # Glom them together
457 |  |  |  |  | $path = $self->catdir( $base, $path ) ;
458 |  |  |  |  | }
459 |  |  |  |  |
460 |  |  |  |  | return $self->canonpath( $path ) ;
461 |  |  |  |  | }
462 |  |  |  |  |
463 |  |  |  |  | =back
464 |  |  |  |  |
465 |  |  |  |  | =head1 COPYRIGHT
466 |  |  |  |  |
467 |  |  |  |  | Copyright (c) 2004 by the Perl 5 Porters. All rights reserved.
468 |  |  |  |  |
469 |  |  |  |  | This program is free software; you can redistribute it and/or modify
470 |  |  |  |  | it under the same terms as Perl itself.
471 |  |  |  |  |
472 |  |  |  |  | =head1 SEE ALSO
473 |  |  |  |  |
474 |  |  |  |  | L<File::Spec>
475 |  |  |  |  |
476 |  |  |  |  | =cut
477 |  |  |  |  |
478 |  |  |  |  | # Internal routine to File::Spec, no point in making this public since
479 |  |  |  |  | # it is the standard Cwd interface. Most of the platform-specific
480 |  |  |  |  | # File::Spec subclasses use this.
481 |  |  |  |  | sub _cwd {
482 |  |  |  |  | require Cwd;
483 |  |  |  |  | Cwd::getcwd();
484 |  |  |  |  | }
485 |  |  |  |  |
486 |  |  |  |  |
487 |  |  |  |  | # Internal method to reduce xx\..\yy -> yy
488 |  |  |  |  | sub _collapse {
489 |  |  |  |  | my($fs, $path) = @_;
490 |  |  |  |  |
491 |  |  |  |  | my $updir = $fs->updir;
492 |  |  |  |  | my $curdir = $fs->curdir;
493 |  |  |  |  |
494 |  |  |  |  | my($vol, $dirs, $file) = $fs->splitpath($path);
495 |  |  |  |  | my @dirs = $fs->splitdir($dirs);
496 |  |  |  |  | pop @dirs if @dirs && $dirs[-1] eq '';
497 |  |  |  |  |
498 |  |  |  |  | my @collapsed;
499 |  |  |  |  | foreach my $dir (@dirs) {
500 |  |  |  |  | if( $dir eq $updir and # if we have an updir
501 |  |  |  |  | @collapsed and # and something to collapse
502 |  |  |  |  | length $collapsed[-1] and # and its not the rootdir
503 |  |  |  |  | $collapsed[-1] ne $updir and # nor another updir
504 |  |  |  |  | $collapsed[-1] ne $curdir # nor the curdir
505 |  |  |  |  | )
506 |  |  |  |  | { # then
507 |  |  |  |  | pop @collapsed; # collapse
508 |  |  |  |  | }
509 |  |  |  |  | else { # else
510 |  |  |  |  | push @collapsed, $dir; # just hang onto it
511 |  |  |  |  | }
512 |  |  |  |  | }
513 |  |  |  |  |
514 |  |  |  |  | return $fs->catpath($vol,
515 |  |  |  |  | $fs->catdir(@collapsed),
516 |  |  |  |  | $file
517 |  |  |  |  | );
518 |  |  |  |  | }
519 |  |  |  |  |
520 |  |  |  |  |
521 | 1 | 10µs |  |  | 1;