1package File::Spec::OS2;
2
3use strict;
4use Cwd ();
5require File::Spec::Unix;
6
7our $VERSION = '3.78';
8$VERSION =~ tr/_//d;
9
10our @ISA = qw(File::Spec::Unix);
11
12sub devnull {
13    return "/dev/nul";
14}
15
16sub case_tolerant {
17    return 1;
18}
19
20sub file_name_is_absolute {
21    my ($self,$file) = @_;
22    return scalar($file =~ m{^([a-z]:)?[\\/]}is);
23}
24
25sub path {
26    my $path = $ENV{PATH};
27    $path =~ s:\\:/:g;
28    my @path = split(';',$path);
29    foreach (@path) { $_ = '.' if $_ eq '' }
30    return @path;
31}
32
33sub tmpdir {
34    my $cached = $_[0]->_cached_tmpdir(qw 'TMPDIR TEMP TMP');
35    return $cached if defined $cached;
36    my @d = @ENV{qw(TMPDIR TEMP TMP)};	# function call could autovivivy
37    $_[0]->_cache_tmpdir(
38	$_[0]->_tmpdir( @d, '/tmp', '/' ), qw 'TMPDIR TEMP TMP'
39    );
40}
41
42sub catdir {
43    my $self = shift;
44    my @args = @_;
45    foreach (@args) {
46	tr[\\][/];
47        # append a backslash to each argument unless it has one there
48        $_ .= "/" unless m{/$};
49    }
50    return $self->canonpath(join('', @args));
51}
52
53sub canonpath {
54    my ($self,$path) = @_;
55    return unless defined $path;
56
57    $path =~ s/^([a-z]:)/\l$1/s;
58    $path =~ s|\\|/|g;
59    $path =~ s|([^/])/+|$1/|g;                  # xx////xx  -> xx/xx
60    $path =~ s|(/\.)+/|/|g;                     # xx/././xx -> xx/xx
61    $path =~ s|^(\./)+(?=[^/])||s;		# ./xx      -> xx
62    $path =~ s|/\Z(?!\n)||
63             unless $path =~ m#^([a-z]:)?/\Z(?!\n)#si;# xx/       -> xx
64    $path =~ s{^/\.\.$}{/};                     # /..    -> /
65    1 while $path =~ s{^/\.\.}{};               # /../xx -> /xx
66    return $path;
67}
68
69
70sub splitpath {
71    my ($self,$path, $nofile) = @_;
72    my ($volume,$directory,$file) = ('','','');
73    if ( $nofile ) {
74        $path =~
75            m{^( (?:[a-zA-Z]:|(?:\\\\|//)[^\\/]+[\\/][^\\/]+)? )
76                 (.*)
77             }xs;
78        $volume    = $1;
79        $directory = $2;
80    }
81    else {
82        $path =~
83            m{^ ( (?: [a-zA-Z]: |
84                      (?:\\\\|//)[^\\/]+[\\/][^\\/]+
85                  )?
86                )
87                ( (?:.*[\\\\/](?:\.\.?\Z(?!\n))?)? )
88                (.*)
89             }xs;
90        $volume    = $1;
91        $directory = $2;
92        $file      = $3;
93    }
94
95    return ($volume,$directory,$file);
96}
97
98
99sub splitdir {
100    my ($self,$directories) = @_ ;
101    split m|[\\/]|, $directories, -1;
102}
103
104
105sub catpath {
106    my ($self,$volume,$directory,$file) = @_;
107
108    # If it's UNC, make sure the glue separator is there, reusing
109    # whatever separator is first in the $volume
110    $volume .= $1
111        if ( $volume =~ m@^([\\/])[\\/][^\\/]+[\\/][^\\/]+\Z(?!\n)@s &&
112             $directory =~ m@^[^\\/]@s
113           ) ;
114
115    $volume .= $directory ;
116
117    # If the volume is not just A:, make sure the glue separator is
118    # there, reusing whatever separator is first in the $volume if possible.
119    if ( $volume !~ m@^[a-zA-Z]:\Z(?!\n)@s &&
120         $volume =~ m@[^\\/]\Z(?!\n)@      &&
121         $file   =~ m@[^\\/]@
122       ) {
123        $volume =~ m@([\\/])@ ;
124        my $sep = $1 ? $1 : '/' ;
125        $volume .= $sep ;
126    }
127
128    $volume .= $file ;
129
130    return $volume ;
131}
132
133
134sub abs2rel {
135    my($self,$path,$base) = @_;
136
137    # Clean up $path
138    if ( ! $self->file_name_is_absolute( $path ) ) {
139        $path = $self->rel2abs( $path ) ;
140    } else {
141        $path = $self->canonpath( $path ) ;
142    }
143
144    # Figure out the effective $base and clean it up.
145    if ( !defined( $base ) || $base eq '' ) {
146	$base = Cwd::getcwd();
147    } elsif ( ! $self->file_name_is_absolute( $base ) ) {
148        $base = $self->rel2abs( $base ) ;
149    } else {
150        $base = $self->canonpath( $base ) ;
151    }
152
153    # Split up paths
154    my ( $path_volume, $path_directories, $path_file ) = $self->splitpath( $path, 1 ) ;
155    my ( $base_volume, $base_directories ) = $self->splitpath( $base, 1 ) ;
156    return $path unless $path_volume eq $base_volume;
157
158    # Now, remove all leading components that are the same
159    my @pathchunks = $self->splitdir( $path_directories );
160    my @basechunks = $self->splitdir( $base_directories );
161
162    while ( @pathchunks &&
163            @basechunks &&
164            lc( $pathchunks[0] ) eq lc( $basechunks[0] )
165          ) {
166        shift @pathchunks ;
167        shift @basechunks ;
168    }
169
170    # No need to catdir, we know these are well formed.
171    $path_directories = CORE::join( '/', @pathchunks );
172    $base_directories = CORE::join( '/', @basechunks );
173
174    # $base_directories now contains the directories the resulting relative
175    # path must ascend out of before it can descend to $path_directory.  So,
176    # replace all names with $parentDir
177
178    #FA Need to replace between backslashes...
179    $base_directories =~ s|[^\\/]+|..|g ;
180
181    # Glue the two together, using a separator if necessary, and preventing an
182    # empty result.
183
184    #FA Must check that new directories are not empty.
185    if ( $path_directories ne '' && $base_directories ne '' ) {
186        $path_directories = "$base_directories/$path_directories" ;
187    } else {
188        $path_directories = "$base_directories$path_directories" ;
189    }
190
191    return $self->canonpath(
192        $self->catpath( "", $path_directories, $path_file )
193    ) ;
194}
195
196
197sub rel2abs {
198    my ($self,$path,$base ) = @_;
199
200    if ( ! $self->file_name_is_absolute( $path ) ) {
201
202        if ( !defined( $base ) || $base eq '' ) {
203	    $base = Cwd::getcwd();
204        }
205        elsif ( ! $self->file_name_is_absolute( $base ) ) {
206            $base = $self->rel2abs( $base ) ;
207        }
208        else {
209            $base = $self->canonpath( $base ) ;
210        }
211
212        my ( $path_directories, $path_file ) =
213            ($self->splitpath( $path, 1 ))[1,2] ;
214
215        my ( $base_volume, $base_directories ) =
216            $self->splitpath( $base, 1 ) ;
217
218        $path = $self->catpath(
219            $base_volume,
220            $self->catdir( $base_directories, $path_directories ),
221            $path_file
222        ) ;
223    }
224
225    return $self->canonpath( $path ) ;
226}
227
2281;
229__END__
230
231=head1 NAME
232
233File::Spec::OS2 - methods for OS/2 file specs
234
235=head1 SYNOPSIS
236
237 require File::Spec::OS2; # Done internally by File::Spec if needed
238
239=head1 DESCRIPTION
240
241See L<File::Spec> and L<File::Spec::Unix>.  This package overrides the
242implementation of these methods, not the semantics.
243
244Amongst the changes made for OS/2 are...
245
246=over 4
247
248=item tmpdir
249
250Modifies the list of places temp directory information is looked for.
251
252    $ENV{TMPDIR}
253    $ENV{TEMP}
254    $ENV{TMP}
255    /tmp
256    /
257
258=item splitpath
259
260Volumes can be drive letters or UNC sharenames (\\server\share).
261
262=back
263
264=head1 COPYRIGHT
265
266Copyright (c) 2004 by the Perl 5 Porters.  All rights reserved.
267
268This program is free software; you can redistribute it and/or modify
269it under the same terms as Perl itself.
270
271=cut
272