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Diffstat (limited to 'Master/tlpkg/installer/perllib/Cwd.pm')
| -rw-r--r-- | Master/tlpkg/installer/perllib/Cwd.pm | 710 |
1 files changed, 0 insertions, 710 deletions
diff --git a/Master/tlpkg/installer/perllib/Cwd.pm b/Master/tlpkg/installer/perllib/Cwd.pm deleted file mode 100644 index 8d25af9f7cd..00000000000 --- a/Master/tlpkg/installer/perllib/Cwd.pm +++ /dev/null @@ -1,710 +0,0 @@ -package Cwd; - -=head1 NAME - -Cwd - get pathname of current working directory - -=head1 SYNOPSIS - - use Cwd; - my $dir = getcwd; - - use Cwd 'abs_path'; - my $abs_path = abs_path($file); - -=head1 DESCRIPTION - -This module provides functions for determining the pathname of the -current working directory. It is recommended that getcwd (or another -*cwd() function) be used in I<all> code to ensure portability. - -By default, it exports the functions cwd(), getcwd(), fastcwd(), and -fastgetcwd() (and, on Win32, getdcwd()) into the caller's namespace. - - -=head2 getcwd and friends - -Each of these functions are called without arguments and return the -absolute path of the current working directory. - -=over 4 - -=item getcwd - - my $cwd = getcwd(); - -Returns the current working directory. - -Re-implements the getcwd(3) (or getwd(3)) functions in Perl. - -=item cwd - - my $cwd = cwd(); - -The cwd() is the most natural form for the current architecture. For -most systems it is identical to `pwd` (but without the trailing line -terminator). - -=item fastcwd - - my $cwd = fastcwd(); - -A more dangerous version of getcwd(), but potentially faster. - -It might conceivably chdir() you out of a directory that it can't -chdir() you back into. If fastcwd encounters a problem it will return -undef but will probably leave you in a different directory. For a -measure of extra security, if everything appears to have worked, the -fastcwd() function will check 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. - -=item fastgetcwd - - my $cwd = fastgetcwd(); - -The fastgetcwd() function is provided as a synonym for cwd(). - -=item getdcwd - - my $cwd = getdcwd(); - my $cwd = getdcwd('C:'); - -The getdcwd() function is also provided on Win32 to get the current working -directory on the specified drive, since Windows maintains a separate current -working directory for each drive. If no drive is specified then the current -drive is assumed. - -This function simply calls the Microsoft C library _getdcwd() function. - -=back - - -=head2 abs_path and friends - -These functions are exported only on request. They each take a single -argument and return the absolute pathname for it. If no argument is -given they'll use the current working directory. - -=over 4 - -=item abs_path - - my $abs_path = abs_path($file); - -Uses the same algorithm as getcwd(). Symbolic links and relative-path -components ("." and "..") are resolved to return the canonical -pathname, just like realpath(3). - -=item realpath - - my $abs_path = realpath($file); - -A synonym for abs_path(). - -=item fast_abs_path - - my $abs_path = fast_abs_path($file); - -A more dangerous, but potentially faster version of abs_path. - -=back - -=head2 $ENV{PWD} - -If you ask to override your chdir() built-in function, - - use Cwd qw(chdir); - -then your PWD environment variable will be kept up to date. Note that -it will only be kept up to date if all packages which use chdir import -it from Cwd. - - -=head1 NOTES - -=over 4 - -=item * - -Since the path seperators are different on some operating systems ('/' -on Unix, ':' on MacPerl, etc...) we recommend you use the File::Spec -modules wherever portability is a concern. - -=item * - -Actually, on Mac OS, the C<getcwd()>, C<fastgetcwd()> and C<fastcwd()> -functions are all aliases for the C<cwd()> function, which, on Mac OS, -calls `pwd`. Likewise, the C<abs_path()> function is an alias for -C<fast_abs_path()>. - -=back - -=head1 AUTHOR - -Originally by the perl5-porters. - -Maintained by Ken Williams <KWILLIAMS@cpan.org> - -=head1 COPYRIGHT - -Copyright (c) 2004 by the Perl 5 Porters. All rights reserved. - -This program is free software; you can redistribute it and/or modify -it under the same terms as Perl itself. - -Portions of the C code in this library are copyright (c) 1994 by the -Regents of the University of California. All rights reserved. The -license on this code is compatible with the licensing of the rest of -the distribution - please see the source code in F<Cwd.xs> for the -details. - -=head1 SEE ALSO - -L<File::chdir> - -=cut - -use strict; -use Exporter; -use vars qw(@ISA @EXPORT @EXPORT_OK $VERSION); - -$VERSION = '3.12'; - -@ISA = qw/ Exporter /; -@EXPORT = qw(cwd getcwd fastcwd fastgetcwd); -push @EXPORT, qw(getdcwd) if $^O eq 'MSWin32'; -@EXPORT_OK = qw(chdir abs_path fast_abs_path realpath fast_realpath); - -# sys_cwd may keep the builtin command - -# All the functionality of this module may provided by builtins, -# there is no sense to process the rest of the file. -# The best choice may be to have this in BEGIN, but how to return from BEGIN? - -if ($^O eq 'os2') { - local $^W = 0; - - *cwd = defined &sys_cwd ? \&sys_cwd : \&_os2_cwd; - *getcwd = \&cwd; - *fastgetcwd = \&cwd; - *fastcwd = \&cwd; - - *fast_abs_path = \&sys_abspath if defined &sys_abspath; - *abs_path = \&fast_abs_path; - *realpath = \&fast_abs_path; - *fast_realpath = \&fast_abs_path; - - return 1; -} - -# If loading the XS stuff doesn't work, we can fall back to pure perl -eval { - if ( $] >= 5.006 ) { - require XSLoader; - XSLoader::load( __PACKAGE__, $VERSION ); - } else { - require DynaLoader; - push @ISA, 'DynaLoader'; - __PACKAGE__->bootstrap( $VERSION ); - } -}; - -# Must be after the DynaLoader stuff: -$VERSION = eval $VERSION; - -# Big nasty table of function aliases -my %METHOD_MAP = - ( - VMS => - { - cwd => '_vms_cwd', - getcwd => '_vms_cwd', - fastcwd => '_vms_cwd', - fastgetcwd => '_vms_cwd', - abs_path => '_vms_abs_path', - fast_abs_path => '_vms_abs_path', - }, - - MSWin32 => - { - # We assume that &_NT_cwd is defined as an XSUB or in the core. - cwd => '_NT_cwd', - getcwd => '_NT_cwd', - fastcwd => '_NT_cwd', - fastgetcwd => '_NT_cwd', - abs_path => 'fast_abs_path', - realpath => 'fast_abs_path', - }, - - dos => - { - cwd => '_dos_cwd', - getcwd => '_dos_cwd', - fastgetcwd => '_dos_cwd', - fastcwd => '_dos_cwd', - abs_path => 'fast_abs_path', - }, - - qnx => - { - cwd => '_qnx_cwd', - getcwd => '_qnx_cwd', - fastgetcwd => '_qnx_cwd', - fastcwd => '_qnx_cwd', - abs_path => '_qnx_abs_path', - fast_abs_path => '_qnx_abs_path', - }, - - cygwin => - { - getcwd => 'cwd', - fastgetcwd => 'cwd', - fastcwd => 'cwd', - abs_path => 'fast_abs_path', - realpath => 'fast_abs_path', - }, - - epoc => - { - cwd => '_epoc_cwd', - getcwd => '_epoc_cwd', - fastgetcwd => '_epoc_cwd', - fastcwd => '_epoc_cwd', - abs_path => 'fast_abs_path', - }, - - MacOS => - { - getcwd => 'cwd', - fastgetcwd => 'cwd', - fastcwd => 'cwd', - abs_path => 'fast_abs_path', - }, - ); - -$METHOD_MAP{NT} = $METHOD_MAP{MSWin32}; -$METHOD_MAP{nto} = $METHOD_MAP{qnx}; - - -# Find the pwd command in the expected locations. We assume these -# are safe. This prevents _backtick_pwd() consulting $ENV{PATH} -# so everything works under taint mode. -my $pwd_cmd; -foreach my $try ('/bin/pwd', - '/usr/bin/pwd', - '/QOpenSys/bin/pwd', # OS/400 PASE. - ) { - - if( -x $try ) { - $pwd_cmd = $try; - last; - } -} -unless ($pwd_cmd) { - # Isn't this wrong? _backtick_pwd() will fail if somenone has - # pwd in their path but it is not /bin/pwd or /usr/bin/pwd? - # See [perl #16774]. --jhi - $pwd_cmd = 'pwd'; -} - -# Lazy-load Carp -sub _carp { require Carp; Carp::carp(@_) } -sub _croak { require Carp; Carp::croak(@_) } - -# The 'natural and safe form' for UNIX (pwd may be setuid root) -sub _backtick_pwd { - # Localize %ENV entries in a way that won't create new hash keys - my @localize = grep exists $ENV{$_}, qw(PATH IFS CDPATH ENV BASH_ENV); - local @ENV{@localize}; - - my $cwd = `$pwd_cmd`; - # Belt-and-suspenders in case someone said "undef $/". - local $/ = "\n"; - # `pwd` may fail e.g. if the disk is full - chomp($cwd) if defined $cwd; - $cwd; -} - -# Since some ports may predefine cwd internally (e.g., NT) -# we take care not to override an existing definition for cwd(). - -unless ($METHOD_MAP{$^O}{cwd} or defined &cwd) { - # The pwd command is not available in some chroot(2)'ed environments - my $sep = $Config::Config{path_sep} || ':'; - my $os = $^O; # Protect $^O from tainting - if( $os eq 'MacOS' || (defined $ENV{PATH} && - $os ne 'MSWin32' && # no pwd on Windows - grep { -x "$_/pwd" } split($sep, $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 -# -# Usage: $cwd = getcwd(); - -sub getcwd -{ - abs_path('.'); -} - - -# By John Bazik -# -# Usage: $cwd = &fastcwd; -# -# This is a faster version of getcwd. It's also more dangerous because -# you might chdir out of a directory that you can't chdir back into. - -sub fastcwd_ { - my($odev, $oino, $cdev, $cino, $tdev, $tino); - my(@path, $path); - local(*DIR); - - my($orig_cdev, $orig_cino) = stat('.'); - ($cdev, $cino) = ($orig_cdev, $orig_cino); - for (;;) { - my $direntry; - ($odev, $oino) = ($cdev, $cino); - CORE::chdir('..') || return undef; - ($cdev, $cino) = stat('.'); - last if $odev == $cdev && $oino == $cino; - opendir(DIR, '.') || return undef; - for (;;) { - $direntry = readdir(DIR); - last unless defined $direntry; - next if $direntry eq '.'; - next if $direntry eq '..'; - - ($tdev, $tino) = lstat($direntry); - last unless $tdev != $odev || $tino != $oino; - } - closedir(DIR); - return undef unless defined $direntry; # should never happen - unshift(@path, $direntry); - } - $path = '/' . join('/', @path); - if ($^O eq 'apollo') { $path = "/".$path; } - # At this point $path may be tainted (if tainting) and chdir would fail. - # Untaint it then check that we landed where we started. - $path =~ /^(.*)\z/s # untaint - && CORE::chdir($1) or return undef; - ($cdev, $cino) = stat('.'); - die "Unstable directory path, current directory changed unexpectedly" - if $cdev != $orig_cdev || $cino != $orig_cino; - $path; -} -if (not defined &fastcwd) { *fastcwd = \&fastcwd_ } - - -# Keeps track of current working directory in PWD environment var -# Usage: -# use Cwd 'chdir'; -# chdir $newdir; - -my $chdir_init = 0; - -sub chdir_init { - if ($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) { - $ENV{'PWD'} = cwd(); - } - } - else { - my $wd = cwd(); - $wd = Win32::GetFullPathName($wd) if $^O eq 'MSWin32'; - $ENV{'PWD'} = $wd; - } - # Strip an automounter prefix (where /tmp_mnt/foo/bar == /foo/bar) - if ($^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) { - $ENV{'PWD'}="$2$3"; - } - } - $chdir_init = 1; -} - -sub chdir { - 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'} = $ENV{'DEFAULT'} - } - elsif ($^O eq 'MacOS') { - return $ENV{'PWD'} = cwd(); - } - elsif ($^O eq 'MSWin32') { - $ENV{'PWD'} = $newpwd; - return 1; - } - - if ($newdir =~ m#^/#s) { - $ENV{'PWD'} = $newdir; - } else { - my @curdir = split(m#/#,$ENV{'PWD'}); - @curdir = ('') unless @curdir; - my $component; - foreach $component (split(m#/#, $newdir)) { - next if $component eq '.'; - pop(@curdir),next if $component eq '..'; - push(@curdir,$component); - } - $ENV{'PWD'} = join('/',@curdir) || '/'; - } - 1; -} - - -sub _perl_abs_path -{ - my $start = @_ ? shift : '.'; - my($dotdots, $cwd, @pst, @cst, $dir, @tst); - - unless (@cst = stat( $start )) - { - _carp("stat($start): $!"); - return ''; - } - - unless (-d _) { - # Make sure we can be invoked on plain files, not just directories. - # NOTE that this routine assumes that '/' is the only directory separator. - - my ($dir, $file) = $start =~ m{^(.*)/(.+)$} - or return cwd() . '/' . $start; - - # Can't use "-l _" here, because the previous stat was a stat(), not an lstat(). - if (-l $start) { - my $link_target = readlink($start); - die "Can't resolve link $start: $!" unless defined $link_target; - - require File::Spec; - $link_target = $dir . '/' . $link_target - unless File::Spec->file_name_is_absolute($link_target); - - return abs_path($link_target); - } - - return $dir ? abs_path($dir) . "/$file" : "/$file"; - } - - $cwd = ''; - $dotdots = $start; - do - { - $dotdots .= '/..'; - @pst = @cst; - local *PARENT; - unless (opendir(PARENT, $dotdots)) - { - _carp("opendir($dotdots): $!"); - return ''; - } - unless (@cst = stat($dotdots)) - { - _carp("stat($dotdots): $!"); - closedir(PARENT); - return ''; - } - if ($pst[0] == $cst[0] && $pst[1] == $cst[1]) - { - $dir = undef; - } - else - { - do - { - unless (defined ($dir = readdir(PARENT))) - { - _carp("readdir($dotdots): $!"); - closedir(PARENT); - return ''; - } - $tst[0] = $pst[0]+1 unless (@tst = lstat("$dotdots/$dir")) - } - while ($dir eq '.' || $dir eq '..' || $tst[0] != $pst[0] || - $tst[1] != $pst[1]); - } - $cwd = (defined $dir ? "$dir" : "" ) . "/$cwd" ; - closedir(PARENT); - } while (defined $dir); - chop($cwd) unless $cwd eq '/'; # drop the trailing / - $cwd; -} - - -my $Curdir; -sub fast_abs_path { - local $ENV{PWD} = $ENV{PWD} || ''; # Guard against clobberage - my $cwd = getcwd(); - require File::Spec; - my $path = @_ ? shift : ($Curdir ||= File::Spec->curdir); - - # Detaint else we'll explode in taint mode. This is safe because - # we're not doing anything dangerous with it. - ($path) = $path =~ /(.*)/; - ($cwd) = $cwd =~ /(.*)/; - - unless (-e $path) { - _croak("$path: No such file or directory"); - } - - unless (-d _) { - # Make sure we can be invoked on plain files, not just directories. - - my ($vol, $dir, $file) = File::Spec->splitpath($path); - return File::Spec->catfile($cwd, $path) unless length $dir; - - if (-l $path) { - my $link_target = readlink($path); - die "Can't resolve link $path: $!" unless defined $link_target; - - $link_target = File::Spec->catpath($vol, $dir, $link_target) - unless File::Spec->file_name_is_absolute($link_target); - - return fast_abs_path($link_target); - } - - return $dir eq File::Spec->rootdir - ? File::Spec->catpath($vol, $dir, $file) - : fast_abs_path(File::Spec->catpath($vol, $dir, '')) . '/' . $file; - } - - if (!CORE::chdir($path)) { - _croak("Cannot chdir to $path: $!"); - } - my $realpath = getcwd(); - if (! ((-d $cwd) && (CORE::chdir($cwd)))) { - _croak("Cannot chdir back to $cwd: $!"); - } - $realpath; -} - -# added function alias to follow principle of least surprise -# based on previous aliasing. --tchrist 27-Jan-00 -*fast_realpath = \&fast_abs_path; - - -# --- PORTING SECTION --- - -# VMS: $ENV{'DEFAULT'} points to default directory at all times -# 06-Mar-1996 Charles Bailey bailey@newman.upenn.edu -# Note: Use of Cwd::chdir() causes the logical name PWD to be defined -# in the process logical name table as the default device and directory -# seen by Perl. This may not be the same as the default device -# and directory seen by DCL after Perl exits, since the effects -# the CRTL chdir() function persist only until Perl exits. - -sub _vms_cwd { - return $ENV{'DEFAULT'}; -} - -sub _vms_abs_path { - return $ENV{'DEFAULT'} unless @_; - - # may need to turn foo.dir into [.foo] - my $path = VMS::Filespec::pathify($_[0]); - $path = $_[0] unless defined $path; - - return VMS::Filespec::rmsexpand($path); -} - -sub _os2_cwd { - $ENV{'PWD'} = `cmd /c cd`; - chomp $ENV{'PWD'}; - $ENV{'PWD'} =~ s:\\:/:g ; - return $ENV{'PWD'}; -} - -sub _win32_cwd { - $ENV{'PWD'} = Win32::GetCwd(); - $ENV{'PWD'} =~ s:\\:/:g ; - return $ENV{'PWD'}; -} - -*_NT_cwd = defined &Win32::GetCwd ? \&_win32_cwd : \&_os2_cwd; - -sub _dos_cwd { - if (!defined &Dos::GetCwd) { - $ENV{'PWD'} = `command /c cd`; - chomp $ENV{'PWD'}; - $ENV{'PWD'} =~ s:\\:/:g ; - } else { - $ENV{'PWD'} = Dos::GetCwd(); - } - return $ENV{'PWD'}; -} - -sub _qnx_cwd { - local $ENV{PATH} = ''; - local $ENV{CDPATH} = ''; - local $ENV{ENV} = ''; - $ENV{'PWD'} = `/usr/bin/fullpath -t`; - chomp $ENV{'PWD'}; - return $ENV{'PWD'}; -} - -sub _qnx_abs_path { - local $ENV{PATH} = ''; - local $ENV{CDPATH} = ''; - local $ENV{ENV} = ''; - my $path = @_ ? shift : '.'; - local *REALPATH; - - defined( open(REALPATH, '-|') || exec '/usr/bin/fullpath', '-t', $path ) or - die "Can't open /usr/bin/fullpath: $!"; - my $realpath = <REALPATH>; - close REALPATH; - chomp $realpath; - return $realpath; -} - -sub _epoc_cwd { - $ENV{'PWD'} = EPOC::getcwd(); - return $ENV{'PWD'}; -} - - -# Now that all the base-level functions are set up, alias the -# user-level functions to the right places - -if (exists $METHOD_MAP{$^O}) { - my $map = $METHOD_MAP{$^O}; - foreach my $name (keys %$map) { - local $^W = 0; # assignments trigger 'subroutine redefined' warning - no strict 'refs'; - *{$name} = \&{$map->{$name}}; - } -} - -# In case the XS version doesn't load. -*abs_path = \&_perl_abs_path unless defined &abs_path; - -# added function alias for those of us more -# used to the libc function. --tchrist 27-Jan-00 -*realpath = \&abs_path; - -1; |