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Win32.pm
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package File::Spec::Win32;
use strict;
use vars qw(@ISA $VERSION);
require File::Spec::Unix;
$VERSION = '1.5';
@ISA = qw(File::Spec::Unix);
=head1 NAME
File::Spec::Win32 - methods for Win32 file specs
=head1 SYNOPSIS
require File::Spec::Win32; # Done internally by File::Spec if needed
=head1 DESCRIPTION
See File::Spec::Unix for a documentation of the methods provided
there. This package overrides the implementation of these methods, not
the semantics.
=over 4
=item devnull
Returns a string representation of the null device.
=cut
sub devnull {
return "nul";
}
=item tmpdir
Returns a string representation of the first existing directory
from the following list:
$ENV{TMPDIR}
$ENV{TEMP}
$ENV{TMP}
SYS:/temp
C:/temp
/tmp
/
The SYS:/temp is preferred in Novell NetWare (the File::Spec::Win32
is used also for NetWare).
Since Perl 5.8.0, if running under taint mode, and if the environment
variables are tainted, they are not used.
=cut
my $tmpdir;
sub tmpdir {
return $tmpdir if defined $tmpdir;
my $self = shift;
$tmpdir = $self->_tmpdir( @ENV{qw(TMPDIR TEMP TMP)},
'SYS:/temp',
'C:/temp',
'/tmp',
'/' );
}
sub case_tolerant {
return 1;
}
sub file_name_is_absolute {
my ($self,$file) = @_;
return scalar($file =~ m{^([a-z]:)?[\\/]}is);
}
=item catfile
Concatenate one or more directory names and a filename to form a
complete path ending with a filename
=cut
sub catfile {
my $self = shift;
my $file = $self->canonpath(pop @_);
return $file unless @_;
my $dir = $self->catdir(@_);
$dir .= "\\" unless substr($dir,-1) eq "\\";
return $dir.$file;
}
sub catdir {
my $self = shift;
my @args = @_;
foreach (@args) {
tr[/][\\];
# append a backslash to each argument unless it has one there
$_ .= "\\" unless m{\\$};
}
return $self->canonpath(join('', @args));
}
sub path {
my $path = $ENV{'PATH'} || $ENV{'Path'} || $ENV{'path'};
my @path = split(';',$path);
foreach (@path) { $_ = '.' if $_ eq '' }
return @path;
}
=item canonpath
No physical check on the filesystem, but a logical cleanup of a
path. On UNIX eliminated successive slashes and successive "/.".
On Win32 makes
dir1\dir2\dir3\..\..\dir4 -> \dir\dir4 and even
dir1\dir2\dir3\...\dir4 -> \dir\dir4
=cut
sub canonpath {
my ($self,$path) = @_;
my $orig_path = $path;
$path =~ s/^([a-z]:)/\u$1/s;
$path =~ s|/|\\|g;
$path =~ s|([^\\])\\+|$1\\|g; # xx\\\\xx -> xx\xx
$path =~ s|(\\\.)+\\|\\|g; # xx\.\.\xx -> xx\xx
$path =~ s|^(\.\\)+||s unless $path eq ".\\"; # .\xx -> xx
$path =~ s|\\\Z(?!\n)||
unless $path =~ m{^([A-Z]:)?\\\Z(?!\n)}s; # xx\ -> xx
# xx1/xx2/xx3/../../xx -> xx1/xx
$path =~ s|\\\.\.\.\\|\\\.\.\\\.\.\\|g; # \...\ is 2 levels up
$path =~ s|^\.\.\.\\|\.\.\\\.\.\\|g; # ...\ is 2 levels up
return $path if $path =~ m|^\.\.|; # skip relative paths
return $path unless $path =~ /\.\./; # too few .'s to cleanup
return $path if $path =~ /\.\.\.\./; # too many .'s to cleanup
$path =~ s{^\\\.\.$}{\\}; # \.. -> \
1 while $path =~ s{^\\\.\.}{}; # \..\xx -> \xx
my ($vol,$dirs,$file) = $self->splitpath($path);
my @dirs = $self->splitdir($dirs);
my (@base_dirs, @path_dirs);
my $dest = \@base_dirs;
for my $dir (@dirs){
$dest = \@path_dirs if $dir eq $self->updir;
push @$dest, $dir;
}
# for each .. in @path_dirs pop one item from
# @base_dirs
while (my $dir = shift @path_dirs){
unless ($dir eq $self->updir){
unshift @path_dirs, $dir;
last;
}
pop @base_dirs;
}
$path = $self->catpath(
$vol,
$self->catdir(@base_dirs, @path_dirs),
$file
);
return $path;
}
=item splitpath
($volume,$directories,$file) = File::Spec->splitpath( $path );
($volume,$directories,$file) = File::Spec->splitpath( $path, $no_file );
Splits a path into volume, directory, and filename portions. Assumes that
the last file is a path unless the path ends in '\\', '\\.', '\\..'
or $no_file is true. On Win32 this means that $no_file true makes this return
( $volume, $path, '' ).
Separators accepted are \ and /.
Volumes can be drive letters or UNC sharenames (\\server\share).
The results can be passed to L</catpath> to get back a path equivalent to
(usually identical to) the original path.
=cut
sub splitpath {
my ($self,$path, $nofile) = @_;
my ($volume,$directory,$file) = ('','','');
if ( $nofile ) {
$path =~
m{^( (?:[a-zA-Z]:|(?:\\\\|//)[^\\/]+[\\/][^\\/]+)? )
(.*)
}xs;
$volume = $1;
$directory = $2;
}
else {
$path =~
m{^ ( (?: [a-zA-Z]: |
(?:\\\\|//)[^\\/]+[\\/][^\\/]+
)?
)
( (?:.*[\\/](?:\.\.?\Z(?!\n))?)? )
(.*)
}xs;
$volume = $1;
$directory = $2;
$file = $3;
}
return ($volume,$directory,$file);
}
=item splitdir
The opposite of L<catdir()|File::Spec/catdir()>.
@dirs = File::Spec->splitdir( $directories );
$directories must be only the directory portion of the path on systems
that have the concept of a volume or that have path syntax that differentiates
files from directories.
Unlike just splitting the directories on the separator, leading empty and
trailing directory entries can be returned, because these are significant
on some OSs. So,
File::Spec->splitdir( "/a/b/c" );
Yields:
( '', 'a', 'b', '', 'c', '' )
=cut
sub splitdir {
my ($self,$directories) = @_ ;
#
# split() likes to forget about trailing null fields, so here we
# check to be sure that there will not be any before handling the
# simple case.
#
if ( $directories !~ m|[\\/]\Z(?!\n)| ) {
return split( m|[\\/]|, $directories );
}
else {
#
# since there was a trailing separator, add a file name to the end,
# then do the split, then replace it with ''.
#
my( @directories )= split( m|[\\/]|, "${directories}dummy" ) ;
$directories[ $#directories ]= '' ;
return @directories ;
}
}
=item catpath
Takes volume, directory and file portions and returns an entire path. Under
Unix, $volume is ignored, and this is just like catfile(). On other OSs,
the $volume become significant.
=cut
sub catpath {
my ($self,$volume,$directory,$file) = @_;
# If it's UNC, make sure the glue separator is there, reusing
# whatever separator is first in the $volume
$volume .= $1
if ( $volume =~ m@^([\\/])[\\/][^\\/]+[\\/][^\\/]+\Z(?!\n)@s &&
$directory =~ m@^[^\\/]@s
) ;
$volume .= $directory ;
# If the volume is not just A:, make sure the glue separator is
# there, reusing whatever separator is first in the $volume if possible.
if ( $volume !~ m@^[a-zA-Z]:\Z(?!\n)@s &&
$volume =~ m@[^\\/]\Z(?!\n)@ &&
$file =~ m@[^\\/]@
) {
$volume =~ m@([\\/])@ ;
my $sep = $1 ? $1 : '\\' ;
$volume .= $sep ;
}
$volume .= $file ;
return $volume ;
}
sub abs2rel {
my($self,$path,$base) = @_;
$base = $self->_cwd() unless defined $base and length $base;
for ($path, $base) { $_ = $self->canonpath($_) }
my ($path_volume) = $self->splitpath($path, 1);
my ($base_volume) = $self->splitpath($base, 1);
# Can't relativize across volumes
return $path unless $path_volume eq $base_volume;
for ($path, $base) { $_ = $self->rel2abs($_) }
my $path_directories = ($self->splitpath($path, 1))[1];
my $base_directories = ($self->splitpath($base, 1))[1];
# Now, remove all leading components that are the same
my @pathchunks = $self->splitdir( $path_directories );
my @basechunks = $self->splitdir( $base_directories );
while ( @pathchunks &&
@basechunks &&
lc( $pathchunks[0] ) eq lc( $basechunks[0] )
) {
shift @pathchunks ;
shift @basechunks ;
}
my $result_dirs = $self->catdir( ($self->updir) x @basechunks, @pathchunks );
return $self->canonpath( $self->catpath('', $result_dirs, '') );
}
sub rel2abs {
my ($self,$path,$base ) = @_;
if ( ! $self->file_name_is_absolute( $path ) ) {
if ( !defined( $base ) || $base eq '' ) {
require Cwd ;
$base = Cwd::getdcwd( ($self->splitpath( $path ))[0] ) if defined &Cwd::getdcwd ;
$base = $self->_cwd() unless defined $base ;
}
elsif ( ! $self->file_name_is_absolute( $base ) ) {
$base = $self->rel2abs( $base ) ;
}
else {
$base = $self->canonpath( $base ) ;
}
my ( $path_directories, $path_file ) =
($self->splitpath( $path, 1 ))[1,2] ;
my ( $base_volume, $base_directories ) =
$self->splitpath( $base, 1 ) ;
$path = $self->catpath(
$base_volume,
$self->catdir( $base_directories, $path_directories ),
$path_file
) ;
}
return $self->canonpath( $path ) ;
}
=back
=head2 Note For File::Spec::Win32 Maintainers
Novell NetWare inherits its File::Spec behaviour from File::Spec::Win32.
=head1 SEE ALSO
See L<File::Spec> and L<File::Spec::Unix>. This package overrides the
implementation of these methods, not the semantics.
=cut
1;