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-rw-r--r--contrib/perl5/lib/Cwd.pm122
1 files changed, 89 insertions, 33 deletions
diff --git a/contrib/perl5/lib/Cwd.pm b/contrib/perl5/lib/Cwd.pm
index 9c078c67122c..b7acfe89fb24 100644
--- a/contrib/perl5/lib/Cwd.pm
+++ b/contrib/perl5/lib/Cwd.pm
@@ -4,7 +4,7 @@ require 5.000;
=head1 NAME
-getcwd - get pathname of current working directory
+Cwd - get pathname of current working directory
=head1 SYNOPSIS
@@ -15,6 +15,9 @@ getcwd - get pathname of current working directory
$dir = getcwd;
use Cwd;
+ $dir = fastcwd;
+
+ use Cwd;
$dir = fastgetcwd;
use Cwd 'chdir';
@@ -29,16 +32,21 @@ getcwd - get pathname of current working directory
=head1 DESCRIPTION
+This module provides functions for determining the pathname of the
+current working directory. By default, it exports the functions
+cwd(), getcwd(), fastcwd(), and fastgetcwd() into the caller's
+namespace. Each of these functions are called without arguments and
+return the absolute path of the current working directory. It is
+recommended that cwd (or another *cwd() function) be used in I<all>
+code to ensure portability.
+
+The cwd() is the most natural and safe form for the current
+architecture. For most systems it is identical to `pwd` (but without
+the trailing line terminator).
+
The getcwd() function re-implements the getcwd(3) (or getwd(3)) functions
in Perl.
-The abs_path() function takes a single argument and returns the
-absolute pathname for that argument. It uses the same algorithm
-as getcwd(). (Actually, getcwd() is abs_path(".")) Symbolic links
-and relative-path components ("." and "..") are resolved to return
-the canonical pathname, just like realpath(3). Also callable as
-realpath().
-
The fastcwd() function looks the same as getcwd(), but runs faster.
It's also more dangerous because it might conceivably chdir() you out
of a directory that it can't chdir() you back into. If fastcwd
@@ -49,16 +57,17 @@ that it leaves you in the same directory that it started in. If it has
changed it will C<die> with the message "Unstable directory path,
current directory changed unexpectedly". That should never happen.
-The fast_abs_path() function looks the same as abs_path(), but runs faster.
-And like fastcwd() is more dangerous.
+The fastgetcwd() function is provided as a synonym for cwd().
-The cwd() function looks the same as getcwd and fastgetcwd but is
-implemented using the most natural and safe form for the current
-architecture. For most systems it is identical to `pwd` (but without
-the trailing line terminator).
+The abs_path() function takes a single argument and returns the
+absolute pathname for that argument. It uses the same algorithm as
+getcwd(). (Actually, getcwd() is abs_path(".")) Symbolic links and
+relative-path components ("." and "..") are resolved to return the
+canonical pathname, just like realpath(3). This function is also
+callable as realpath().
-It is recommended that cwd (or another *cwd() function) is used in
-I<all> code to ensure portability.
+The fast_abs_path() function looks the same as abs_path() but runs
+faster and, like fastcwd(), is more dangerous.
If you ask to override your chdir() built-in function, then your PWD
environment variable will be kept up to date. (See
@@ -67,31 +76,42 @@ kept up to date if all packages which use chdir import it from Cwd.
=cut
-## use strict;
+use strict;
use Carp;
-$VERSION = '2.02';
+our $VERSION = '2.04';
-require Exporter;
-@ISA = qw(Exporter);
-@EXPORT = qw(cwd getcwd fastcwd fastgetcwd);
-@EXPORT_OK = qw(chdir abs_path fast_abs_path realpath fast_realpath);
+use base qw/ Exporter /;
+our @EXPORT = qw(cwd getcwd fastcwd fastgetcwd);
+our @EXPORT_OK = qw(chdir abs_path fast_abs_path realpath fast_realpath);
# The 'natural and safe form' for UNIX (pwd may be setuid root)
sub _backtick_pwd {
- my $cwd;
- chop($cwd = `/bin/pwd`);
+ my $cwd = `/bin/pwd`;
+ # `pwd` may fail e.g. if the disk is full
+ chomp($cwd) if defined $cwd;
$cwd;
}
# Since some ports may predefine cwd internally (e.g., NT)
# we take care not to override an existing definition for cwd().
-*cwd = \&_backtick_pwd unless defined &cwd;
+unless(defined &cwd) {
+ # The pwd command is not available in some chroot(2)'ed environments
+ if($^O eq 'MacOS' || grep { -x "$_/pwd" } split(':', $ENV{PATH})) {
+ *cwd = \&_backtick_pwd;
+ }
+ else {
+ *cwd = \&getcwd;
+ }
+}
+# set a reasonable (and very safe) default for fastgetcwd, in case it
+# isn't redefined later (20001212 rspier)
+*fastgetcwd = \&cwd;
# By Brandon S. Allbery
#
@@ -157,7 +177,7 @@ sub fastcwd {
my $chdir_init = 0;
sub chdir_init {
- if ($ENV{'PWD'} and $^O ne 'os2' and $^O ne 'dos') {
+ if ($ENV{'PWD'} and $^O ne 'os2' and $^O ne 'dos' and $^O ne 'MSWin32') {
my($dd,$di) = stat('.');
my($pd,$pi) = stat($ENV{'PWD'});
if (!defined $dd or !defined $pd or $di != $pi or $dd != $pd) {
@@ -165,10 +185,12 @@ sub chdir_init {
}
}
else {
- $ENV{'PWD'} = cwd();
+ my $wd = cwd();
+ $wd = Win32::GetFullPathName($wd) if $^O eq 'MSWin32';
+ $ENV{'PWD'} = $wd;
}
# Strip an automounter prefix (where /tmp_mnt/foo/bar == /foo/bar)
- if ($ENV{'PWD'} =~ m|(/[^/]+(/[^/]+/[^/]+))(.*)|s) {
+ if ($^O ne 'MSWin32' and $ENV{'PWD'} =~ m|(/[^/]+(/[^/]+/[^/]+))(.*)|s) {
my($pd,$pi) = stat($2);
my($dd,$di) = stat($1);
if (defined $pd and defined $dd and $di == $pi and $dd == $pd) {
@@ -179,11 +201,27 @@ sub chdir_init {
}
sub chdir {
- my $newdir = shift || ''; # allow for no arg (chdir to HOME dir)
- $newdir =~ s|///*|/|g;
+ my $newdir = @_ ? shift : ''; # allow for no arg (chdir to HOME dir)
+ $newdir =~ s|///*|/|g unless $^O eq 'MSWin32';
chdir_init() unless $chdir_init;
+ my $newpwd;
+ if ($^O eq 'MSWin32') {
+ # get the full path name *before* the chdir()
+ $newpwd = Win32::GetFullPathName($newdir);
+ }
+
return 0 unless CORE::chdir $newdir;
- if ($^O eq 'VMS') { return $ENV{'PWD'} = $ENV{'DEFAULT'} }
+
+ if ($^O eq 'VMS') {
+ return $ENV{'PWD'} = $ENV{'DEFAULT'}
+ }
+ elsif ($^O eq 'MacOS') {
+ return $ENV{'PWD'} = cwd();
+ }
+ elsif ($^O eq 'MSWin32') {
+ $ENV{'PWD'} = $newpwd;
+ return 1;
+ }
if ($newdir =~ m#^/#s) {
$ENV{'PWD'} = $newdir;
@@ -264,7 +302,7 @@ sub abs_path
sub fast_abs_path {
my $cwd = getcwd();
- my $path = shift || '.';
+ my $path = @_ ? shift : '.';
CORE::chdir($path) || croak "Cannot chdir to $path:$!";
my $realpath = getcwd();
CORE::chdir($cwd) || croak "Cannot chdir back to $cwd:$!";
@@ -333,12 +371,17 @@ sub _qnx_cwd {
}
sub _qnx_abs_path {
- my $path = shift || '.';
+ my $path = @_ ? shift : '.';
my $realpath=`/usr/bin/fullpath -t $path`;
chop $realpath;
return $realpath;
}
+sub _epoc_cwd {
+ $ENV{'PWD'} = EPOC::getcwd();
+ return $ENV{'PWD'};
+}
+
{
no warnings; # assignments trigger 'subroutine redefined' warning
@@ -387,6 +430,19 @@ sub _qnx_abs_path {
*fastcwd = \&cwd;
*abs_path = \&fast_abs_path;
}
+ elsif ($^O eq 'epoc') {
+ *cwd = \&_epoc_cwd;
+ *getcwd = \&_epoc_cwd;
+ *fastgetcwd = \&_epoc_cwd;
+ *fastcwd = \&_epoc_cwd;
+ *abs_path = \&fast_abs_path;
+ }
+ elsif ($^O eq 'MacOS') {
+ *getcwd = \&cwd;
+ *fastgetcwd = \&cwd;
+ *fastcwd = \&cwd;
+ *abs_path = \&fast_abs_path;
+ }
}
# package main; eval join('',<DATA>) || die $@; # quick test
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-30 15:36:04 +0000