Leaked source code of windows server 2003
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package File::Spec::Win32;
use strict;
use Cwd;
use vars qw(@ISA $VERSION);
require File::Spec::Unix;
$VERSION = '1.2';
@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
=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}
C:/temp
/tmp
/
=cut
my $tmpdir;
sub tmpdir {
return $tmpdir if defined $tmpdir;
my $self = shift;
foreach (@ENV{qw(TMPDIR TEMP TMP)}, qw(C:/temp /tmp /)) {
next unless defined && -d;
$tmpdir = $_;
last;
}
$tmpdir = '' unless defined $tmpdir;
$tmpdir = $self->canonpath($tmpdir);
return $tmpdir;
}
sub case_tolerant {
return 1;
}
sub file_name_is_absolute {
my ($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 = pop @_;
return $file unless @_;
my $dir = $self->catdir(@_);
$dir .= "\\" unless substr($dir,-1) eq "\\";
return $dir.$file;
}
sub path {
my $path = $ENV{'PATH'} || $ENV{'Path'} || $ENV{'path'};
my @path = split(';',$path);
foreach (@path) { $_ = '.' if $_ eq '' }
return @path;
}
=item canonpath
No physical check on the filesystem, but a logical cleanup of a
path. On UNIX eliminated successive slashes and successive "/.".
=cut
sub canonpath {
my ($self,$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
return $path;
}
=item splitpath
($volume,$directories,$file) = File::Spec->splitpath( $path );
($volume,$directories,$file) = File::Spec->splitpath( $path, $no_file );
Splits a path in to 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, $path, undef ).
Separators accepted are \ and /.
Volumes can be drive letters or UNC sharenames (\\server\share).
The results can be passed to L</catpath> to get back a path equivalent to
(usually identical to) the original path.
=cut
sub splitpath {
my ($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()>.
@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) = @_;
# Clean up $path
if ( ! $self->file_name_is_absolute( $path ) ) {
$path = $self->rel2abs( $path ) ;
}
else {
$path = $self->canonpath( $path ) ;
}
# Figure out the effective $base and clean it up.
if ( ! $self->file_name_is_absolute( $base ) ) {
$base = $self->rel2abs( $base ) ;
}
elsif ( !defined( $base ) || $base eq '' ) {
$base = cwd() ;
}
else {
$base = $self->canonpath( $base ) ;
}
# Split up paths
my ( $path_volume, $path_directories, $path_file ) =
$self->splitpath( $path, 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 ;
}
# No need to catdir, we know these are well formed.
$path_directories = CORE::join( '\\', @pathchunks );
$base_directories = CORE::join( '\\', @basechunks );
# $base_directories now contains the directories the resulting relative
# path must ascend out of before it can descend to $path_directory. So,
# replace all names with $parentDir
#FA Need to replace between backslashes...
$base_directories =~ s|[^\\]+|..|g ;
# Glue the two together, using a separator if necessary, and preventing an
# empty result.
#FA Must check that new directories are not empty.
if ( $path_directories ne '' && $base_directories ne '' ) {
$path_directories = "$base_directories\\$path_directories" ;
} else {
$path_directories = "$base_directories$path_directories" ;
}
# It makes no sense to add a relative path to a UNC volume
$path_volume = '' unless $path_volume =~ m{^[A-Z]:}is ;
return $self->canonpath(
$self->catpath($path_volume, $path_directories, $path_file )
) ;
}
sub rel2abs {
my ($self,$path,$base ) = @_;
if ( ! $self->file_name_is_absolute( $path ) ) {
if ( !defined( $base ) || $base eq '' ) {
$base = cwd() ;
}
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
=head1 SEE ALSO
L<File::Spec>
=cut
1;