CasperSecurity
package File::Spec::Unix;
use strict;
use Cwd ();
our $VERSION = '3.80';
$VERSION =~ tr/_//d;
sub _pp_canonpath {
my ($self,$path) = @_;
return unless defined $path;
# Handle POSIX-style node names beginning with double slash (qnx, nto)
# (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 = '';
my $double_slashes_special = $^O eq 'qnx' || $^O eq 'nto';
if ( $double_slashes_special
&& ( $path =~ s{^(//[^/]+)/?\z}{}s || $path =~ s{^(//[^/]+)/}{/}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|/{2,}|/|g; # xx////xx -> xx/xx
$path =~ s{(?:/\.)+(?:/|\z)}{/}g; # xx/././xx -> xx/xx
$path =~ s|^(?:\./)+||s unless $path eq "./"; # ./xx -> xx
$path =~ s|^/(?:\.\./)+|/|; # /../../xx -> xx
$path =~ s|^/\.\.$|/|; # /.. -> /
$path =~ s|/\z|| unless $path eq "/"; # xx/ -> xx
return "$node$path";
}
*canonpath = \&_pp_canonpath unless defined &canonpath;
sub _pp_catdir {
my $self = shift;
$self->canonpath(join('/', @_, '')); # '' because need a trailing '/'
}
*catdir = \&_pp_catdir unless defined &catdir;
sub _pp_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;
}
*catfile = \&_pp_catfile unless defined &catfile;
sub curdir { '.' }
use constant _fn_curdir => ".";
sub devnull { '/dev/null' }
use constant _fn_devnull => "/dev/null";
sub rootdir { '/' }
use constant _fn_rootdir => "/";
my ($tmpdir, %tmpenv);
# Cache and return the calculated tmpdir, recording which env vars
# determined it.
sub _cache_tmpdir {
@tmpenv{@_[2..$#_]} = @ENV{@_[2..$#_]};
return $tmpdir = $_[1];
}
# Retrieve the cached tmpdir, checking first whether relevant env vars have
# changed and invalidated the cache.
sub _cached_tmpdir {
shift;
local $^W;
return if grep $ENV{$_} ne $tmpenv{$_}, @_;
return $tmpdir;
}
sub _tmpdir {
my $self = shift;
my @dirlist = @_;
my $taint = do { no strict 'refs'; ${"\cTAINT"} };
if ($taint) { # Check for taint mode on perl >= 5.8.0
require Scalar::Util;
@dirlist = grep { ! Scalar::Util::tainted($_) } @dirlist;
}
elsif ($] < 5.007) { # No ${^TAINT} before 5.8
@dirlist = grep { !defined($_) || eval { eval('1'.substr $_,0,0) } }
@dirlist;
}
foreach (@dirlist) {
next unless defined && -d && -w _;
$tmpdir = $_;
last;
}
$tmpdir = $self->curdir unless defined $tmpdir;
$tmpdir = defined $tmpdir && $self->canonpath($tmpdir);
if ( !$self->file_name_is_absolute($tmpdir) ) {
# See [perl #120593] for the full details
# If possible, return a full path, rather than '.' or 'lib', but
# jump through some hoops to avoid returning a tainted value.
($tmpdir) = grep {
$taint ? ! Scalar::Util::tainted($_) :
$] < 5.007 ? eval { eval('1'.substr $_,0,0) } : 1
} $self->rel2abs($tmpdir), $tmpdir;
}
return $tmpdir;
}
sub tmpdir {
my $cached = $_[0]->_cached_tmpdir('TMPDIR');
return $cached if defined $cached;
$_[0]->_cache_tmpdir($_[0]->_tmpdir( $ENV{TMPDIR}, "/tmp" ), 'TMPDIR');
}
sub updir { '..' }
use constant _fn_updir => "..";
sub no_upwards {
my $self = shift;
return grep(!/^\.{1,2}\z/s, @_);
}
sub case_tolerant { 0 }
use constant _fn_case_tolerant => 0;
sub file_name_is_absolute {
my ($self,$file) = @_;
return scalar($file =~ m:^/:s);
}
sub path {
return () unless exists $ENV{PATH};
my @path = split(':', $ENV{PATH});
foreach (@path) { $_ = '.' if $_ eq '' }
return @path;
}
sub join {
my $self = shift;
return $self->catfile(@_);
}
sub splitpath {
my ($self,$path, $nofile) = @_;
my ($volume,$directory,$file) = ('','','');
if ( $nofile ) {
$directory = $path;
}
else {
$path =~ m|^ ( (?: .* / (?: \.\.?\z )? )? ) ([^/]*) |xs;
$directory = $1;
$file = $2;
}
return ($volume,$directory,$file);
}
sub splitdir {
return split m|/|, $_[1], -1; # Preserve trailing fields
}
sub catpath {
my ($self,$volume,$directory,$file) = @_;
if ( $directory ne '' &&
$file ne '' &&
substr( $directory, -1 ) ne '/' &&
substr( $file, 0, 1 ) ne '/'
) {
$directory .= "/$file" ;
}
else {
$directory .= $file ;
}
return $directory ;
}
sub abs2rel {
my($self,$path,$base) = @_;
$base = Cwd::getcwd() unless defined $base and length $base;
($path, $base) = map $self->canonpath($_), $path, $base;
my $path_directories;
my $base_directories;
if (grep $self->file_name_is_absolute($_), $path, $base) {
($path, $base) = map $self->rel2abs($_), $path, $base;
my ($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;
$path_directories = ($self->splitpath($path, 1))[1];
$base_directories = ($self->splitpath($base, 1))[1];
# For UNC paths, the user might give a volume like //foo/bar that
# strictly speaking has no directory portion. Treat it as if it
# had the root directory for that volume.
if (!length($base_directories) and $self->file_name_is_absolute($base)) {
$base_directories = $self->rootdir;
}
}
else {
my $wd= ($self->splitpath(Cwd::getcwd(), 1))[1];
$path_directories = $self->catdir($wd, $path);
$base_directories = $self->catdir($wd, $base);
}
# Now, remove all leading components that are the same
my @pathchunks = $self->splitdir( $path_directories );
my @basechunks = $self->splitdir( $base_directories );
if ($base_directories eq $self->rootdir) {
return $self->curdir if $path_directories eq $self->rootdir;
shift @pathchunks;
return $self->canonpath( $self->catpath('', $self->catdir( @pathchunks ), '') );
}
my @common;
while (@pathchunks && @basechunks && $self->_same($pathchunks[0], $basechunks[0])) {
push @common, shift @pathchunks ;
shift @basechunks ;
}
return $self->curdir unless @pathchunks || @basechunks;
# @basechunks now contains the directories the resulting relative path
# must ascend out of before it can descend to $path_directory. If there
# are updir components, we must descend into the corresponding directories
# (this only works if they are no symlinks).
my @reverse_base;
while( defined(my $dir= shift @basechunks) ) {
if( $dir ne $self->updir ) {
unshift @reverse_base, $self->updir;
push @common, $dir;
}
elsif( @common ) {
if( @reverse_base && $reverse_base[0] eq $self->updir ) {
shift @reverse_base;
pop @common;
}
else {
unshift @reverse_base, pop @common;
}
}
}
my $result_dirs = $self->catdir( @reverse_base, @pathchunks );
return $self->canonpath( $self->catpath('', $result_dirs, '') );
}
sub _same {
$_[1] eq $_[2];
}
sub rel2abs {
my ($self,$path,$base ) = @_;
# Clean up $path
if ( ! $self->file_name_is_absolute( $path ) ) {
# Figure out the effective $base and clean it up.
if ( !defined( $base ) || $base eq '' ) {
$base = Cwd::getcwd();
}
elsif ( ! $self->file_name_is_absolute( $base ) ) {
$base = $self->rel2abs( $base ) ;
}
else {
$base = $self->canonpath( $base ) ;
}
# Glom them together
$path = $self->catdir( $base, $path ) ;
}
return $self->canonpath( $path ) ;
}
# Internal method to reduce xx\..\yy -> yy
sub _collapse {
my($fs, $path) = @_;
my $updir = $fs->updir;
my $curdir = $fs->curdir;
my($vol, $dirs, $file) = $fs->splitpath($path);
my @dirs = $fs->splitdir($dirs);
pop @dirs if @dirs && $dirs[-1] eq '';
my @collapsed;
foreach my $dir (@dirs) {
if( $dir eq $updir and # if we have an updir
@collapsed and # and something to collapse
length $collapsed[-1] and # and its not the rootdir
$collapsed[-1] ne $updir and # nor another updir
$collapsed[-1] ne $curdir # nor the curdir
)
{ # then
pop @collapsed; # collapse
}
else { # else
push @collapsed, $dir; # just hang onto it
}
}
return $fs->catpath($vol,
$fs->catdir(@collapsed),
$file
);
}
1;