package File::Spec::Unix;
use strict;
+use vars qw($VERSION);
+
+$VERSION = '1.4';
use Cwd;
=head1 NAME
-File::Spec::Unix - methods used by File::Spec
+File::Spec::Unix - File::Spec for Unix, base for other File::Spec modules
=head1 SYNOPSIS
=head1 DESCRIPTION
-Methods for manipulating file specifications.
+Methods for manipulating file specifications. Other File::Spec
+modules, such as File::Spec::Mac, inherit from File::Spec::Unix and
+override specific methods.
=head1 METHODS
=over 2
-=item canonpath
+=item canonpath()
No physical check on the filesystem, but a logical cleanup of a
-path. On UNIX eliminated successive slashes and successive "/.".
+path. On UNIX eliminates successive slashes and successive "/.".
$cpath = File::Spec->canonpath( $path ) ;
sub canonpath {
my ($self,$path) = @_;
- $path =~ s|/+|/|g unless($^O eq 'cygwin'); # xx////xx -> xx/xx
- $path =~ s|(/\.)+/|/|g; # xx/././xx -> xx/xx
- $path =~ s|^(\./)+|| unless $path eq "./"; # ./xx -> xx
- $path =~ s|^/(\.\./)+|/|; # /../../xx -> xx
- $path =~ s|/$|| unless $path eq "/"; # xx/ -> xx
- return $path;
+
+ # Handle POSIX-style node names beginning with double slash (qnx, nto)
+ # Handle network path names beginning with double slash (cygwin)
+ # (POSIX says: "a pathname that begins with two successive slashes
+ # may be interpreted in an implementation-defined manner, although
+ # more than two leading slashes shall be treated as a single slash.")
+ my $node = '';
+ if ( $^O =~ m/^(?:qnx|nto|cygwin)$/ && $path =~ s:^(//[^/]+)(/|\z):/:s ) {
+ $node = $1;
+ }
+ # This used to be
+ # $path =~ s|/+|/|g unless($^O eq 'cygwin');
+ # but that made tests 29, 30, 35, 46, and 213 (as of #13272) to fail
+ # (Mainly because trailing "" directories didn't get stripped).
+ # Why would cygwin avoid collapsing multiple slashes into one? --jhi
+ $path =~ s|/+|/|g; # xx////xx -> xx/xx
+ $path =~ s@(/\.)+(/|\Z(?!\n))@/@g; # xx/././xx -> xx/xx
+ $path =~ s|^(\./)+||s unless $path eq "./"; # ./xx -> xx
+ $path =~ s|^/(\.\./)+|/|s; # /../../xx -> xx
+ $path =~ s|/\Z(?!\n)|| unless $path eq "/"; # xx/ -> xx
+ return "$node$path";
}
-=item catdir
+=item catdir()
Concatenate two or more directory names to form a complete path ending
with a directory. But remove the trailing slash from the resulting
sub catfile {
my $self = shift;
- my $file = pop @_;
+ my $file = $self->canonpath(pop @_);
return $file unless @_;
my $dir = $self->catdir(@_);
$dir .= "/" unless substr($dir,-1) eq "/";
=item tmpdir
-Returns a string representation of the first writable directory
-from the following list or "" if none are writable:
+Returns a string representation of the first writable directory from
+the following list or the current directory if none from the list are
+writable:
$ENV{TMPDIR}
/tmp
+Since perl 5.8.0, if running under taint mode, and if $ENV{TMPDIR}
+is tainted, it is not used.
+
=cut
my $tmpdir;
-sub tmpdir {
+sub _tmpdir {
return $tmpdir if defined $tmpdir;
- foreach ($ENV{TMPDIR}, "/tmp") {
+ my $self = shift;
+ my @dirlist = @_;
+ {
+ no strict 'refs';
+ if (${"\cTAINT"}) { # Check for taint mode on perl >= 5.8.0
+ require Scalar::Util;
+ @dirlist = grep { ! Scalar::Util::tainted($_) } @dirlist;
+ }
+ }
+ foreach (@dirlist) {
next unless defined && -d && -w _;
$tmpdir = $_;
last;
}
- $tmpdir = '' unless defined $tmpdir;
+ $tmpdir = $self->curdir unless defined $tmpdir;
+ $tmpdir = defined $tmpdir && $self->canonpath($tmpdir);
return $tmpdir;
}
+sub tmpdir {
+ return $tmpdir if defined $tmpdir;
+ my $self = shift;
+ $tmpdir = $self->_tmpdir( $ENV{TMPDIR}, "/tmp" );
+}
+
=item updir
Returns a string representation of the parent directory. ".." on UNIX.
sub no_upwards {
my $self = shift;
- return grep(!/^\.{1,2}$/, @_);
+ return grep(!/^\.{1,2}\Z(?!\n)/s, @_);
+}
+
+=item case_tolerant
+
+Returns a true or false value indicating, respectively, that alphabetic
+is not or is significant when comparing file specifications.
+
+=cut
+
+sub case_tolerant {
+ return 0;
}
=item file_name_is_absolute
-Takes as argument a path and returns true, if it is an absolute path.
+Takes as argument a path and returns true if it is an absolute path.
+
+This does not consult the local filesystem on Unix, Win32, OS/2 or Mac
+OS (Classic). It does consult the working environment for VMS (see
+L<File::Spec::VMS/file_name_is_absolute>).
=cut
sub file_name_is_absolute {
my ($self,$file) = @_;
- return scalar($file =~ m:^/:);
+ return scalar($file =~ m:^/:s);
}
=item path
=cut
sub path {
+ return () unless exists $ENV{PATH};
my @path = split(':', $ENV{PATH});
foreach (@path) { $_ = '.' if $_ eq '' }
return @path;
($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. On systems
-with no concept of volume, returns undef for volume.
+Splits a path into volume, directory, and filename portions. On systems
+with no concept of volume, returns '' for volume.
For systems with no syntax differentiating filenames from directories,
assumes that the last file is a path unless $no_file is true or a
$directory = $path;
}
else {
- $path =~ m|^ ( (?: .* / (?: \.\.?$ )? )? ) ([^/]*) |x;
+ $path =~ m|^ ( (?: .* / (?: \.\.?\Z(?!\n) )? )? ) ([^/]*) |xs;
$directory = $1;
$file = $2;
}
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,
+Unlike just splitting the directories on the separator, empty
+directory names (C<''>) can be returned, because these are significant
+on some OSs.
- File::Spec->splitdir( "/a/b/c" );
+On Unix,
+
+ File::Spec->splitdir( "/a/b//c/" );
Yields:
# check to be sure that there will not be any before handling the
# simple case.
#
- if ( $directories !~ m|/$| ) {
+ if ( $directories !~ m|/\Z(?!\n)| ) {
return split( m|/|, $directories );
}
else {
}
-=item catpath
+=item catpath()
Takes volume, directory and file portions and returns an entire path. Under
-Unix, $volume is ignored, and directory and file are catenated. A '/' is
-inserted if need be. On other OSs, $volume is significant.
+Unix, $volume is ignored, and directory and file are concatenated. A '/' is
+inserted if needed (though if the directory portion doesn't start with
+'/' it is not added). On other OSs, $volume is significant.
=cut
Takes a destination path and an optional base path returns a relative path
from the base path to the destination path:
- $rel_path = File::Spec->abs2rel( $destination ) ;
- $rel_path = File::Spec->abs2rel( $destination, $base ) ;
+ $rel_path = File::Spec->abs2rel( $path ) ;
+ $rel_path = File::Spec->abs2rel( $path, $base ) ;
-If $base is not present or '', then L<cwd()> is used. If $base is relative,
+If $base is not present or '', then L<cwd()|Cwd> is used. If $base is relative,
then it is converted to absolute form using L</rel2abs()>. This means that it
-is taken to be relative to L<cwd()>.
+is taken to be relative to L<cwd()|Cwd>.
On systems with the concept of a volume, this assumes that both paths
are on the $destination volume, and ignores the $base volume.
directories.
If $path is relative, it is converted to absolute form using L</rel2abs()>.
-This means that it is taken to be relative to L<cwd()>.
+This means that it is taken to be relative to L<cwd()|Cwd>.
-Based on code written by Shigio Yamaguchi.
+No checks against the filesystem are made. On VMS, there is
+interaction with the working environment, as logicals and
+macros are expanded.
-No checks against the filesystem are made.
+Based on code written by Shigio Yamaguchi.
=cut
return $self->canonpath( $path ) ;
}
-=item rel2abs
+=item rel2abs()
Converts a relative path to an absolute path.
- $abs_path = $File::Spec->rel2abs( $destination ) ;
- $abs_path = $File::Spec->rel2abs( $destination, $base ) ;
+ $abs_path = File::Spec->rel2abs( $path ) ;
+ $abs_path = File::Spec->rel2abs( $path, $base ) ;
-If $base is not present or '', then L<cwd()> is used. If $base is relative,
+If $base is not present or '', then L<cwd()|Cwd> is used. If $base is relative,
then it is converted to absolute form using L</rel2abs()>. This means that it
-is taken to be relative to L<cwd()>.
+is taken to be relative to L<cwd()|Cwd>.
On systems with the concept of a volume, this assumes that both paths
-are on the $base volume, and ignores the $destination volume.
+are on the $base volume, and ignores the $path volume.
On systems that have a grammar that indicates filenames, this ignores the
$base filename as well. Otherwise all path components are assumed to be
If $path is absolute, it is cleaned up and returned using L</canonpath()>.
-Based on code written by Shigio Yamaguchi.
+No checks against the filesystem are made. On VMS, there is
+interaction with the working environment, as logicals and
+macros are expanded.
-No checks against the filesystem are made.
+Based on code written by Shigio Yamaguchi.
=cut
-sub rel2abs($;$;) {
+sub rel2abs {
my ($self,$path,$base ) = @_;
# Clean up $path