| 1 | package Cwd;
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| 2 |
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| 3 | =head1 NAME
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| 4 |
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| 5 | Cwd - get pathname of current working directory
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| 6 |
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| 7 | =head1 SYNOPSIS
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| 8 |
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| 9 | use Cwd;
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| 10 | my $dir = getcwd;
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| 11 |
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| 12 | use Cwd 'abs_path';
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| 13 | my $abs_path = abs_path($file);
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| 14 |
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| 15 | =head1 DESCRIPTION
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| 16 |
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| 17 | This module provides functions for determining the pathname of the
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| 18 | current working directory. It is recommended that getcwd (or another
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| 19 | *cwd() function) be used in I<all> code to ensure portability.
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| 20 |
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| 21 | By default, it exports the functions cwd(), getcwd(), fastcwd(), and
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| 22 | fastgetcwd() (and, on Win32, getdcwd()) into the caller's namespace.
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| 23 |
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| 24 |
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| 25 | =head2 getcwd and friends
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| 26 |
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| 27 | Each of these functions are called without arguments and return the
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| 28 | absolute path of the current working directory.
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| 29 |
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| 30 | =over 4
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| 31 |
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| 32 | =item getcwd
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| 33 |
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| 34 | my $cwd = getcwd();
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| 35 |
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| 36 | Returns the current working directory.
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| 37 |
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| 38 | Re-implements the getcwd(3) (or getwd(3)) functions in Perl.
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| 39 |
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| 40 | =item cwd
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| 41 |
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| 42 | my $cwd = cwd();
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| 43 |
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| 44 | The cwd() is the most natural form for the current architecture. For
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| 45 | most systems it is identical to `pwd` (but without the trailing line
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| 46 | terminator).
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| 47 |
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| 48 | =item fastcwd
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| 49 |
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| 50 | my $cwd = fastcwd();
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| 51 |
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| 52 | A more dangerous version of getcwd(), but potentially faster.
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| 53 |
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| 54 | It might conceivably chdir() you out of a directory that it can't
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| 55 | chdir() you back into. If fastcwd encounters a problem it will return
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| 56 | undef but will probably leave you in a different directory. For a
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| 57 | measure of extra security, if everything appears to have worked, the
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| 58 | fastcwd() function will check that it leaves you in the same directory
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| 59 | that it started in. If it has changed it will C<die> with the message
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| 60 | "Unstable directory path, current directory changed
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| 61 | unexpectedly". That should never happen.
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| 62 |
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| 63 | =item fastgetcwd
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| 64 |
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| 65 | my $cwd = fastgetcwd();
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| 66 |
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| 67 | The fastgetcwd() function is provided as a synonym for cwd().
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| 68 |
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| 69 | =item getdcwd
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| 70 |
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| 71 | my $cwd = getdcwd();
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| 72 | my $cwd = getdcwd('C:');
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| 73 |
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| 74 | The getdcwd() function is also provided on Win32 to get the current working
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| 75 | directory on the specified drive, since Windows maintains a separate current
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| 76 | working directory for each drive. If no drive is specified then the current
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| 77 | drive is assumed.
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| 78 |
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| 79 | This function simply calls the Microsoft C library _getdcwd() function.
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| 80 |
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| 81 | =back
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| 82 |
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| 83 |
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| 84 | =head2 abs_path and friends
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| 85 |
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| 86 | These functions are exported only on request. They each take a single
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| 87 | argument and return the absolute pathname for it. If no argument is
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| 88 | given they'll use the current working directory.
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| 89 |
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| 90 | =over 4
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| 91 |
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| 92 | =item abs_path
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| 93 |
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| 94 | my $abs_path = abs_path($file);
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| 95 |
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| 96 | Uses the same algorithm as getcwd(). Symbolic links and relative-path
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| 97 | components ("." and "..") are resolved to return the canonical
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| 98 | pathname, just like realpath(3).
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| 99 |
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| 100 | =item realpath
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| 101 |
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| 102 | my $abs_path = realpath($file);
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| 103 |
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| 104 | A synonym for abs_path().
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| 105 |
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| 106 | =item fast_abs_path
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| 107 |
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| 108 | my $abs_path = fast_abs_path($file);
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| 109 |
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| 110 | A more dangerous, but potentially faster version of abs_path.
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| 111 |
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| 112 | =back
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| 113 |
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| 114 | =head2 $ENV{PWD}
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| 115 |
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| 116 | If you ask to override your chdir() built-in function,
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| 117 |
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| 118 | use Cwd qw(chdir);
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| 119 |
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| 120 | then your PWD environment variable will be kept up to date. Note that
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| 121 | it will only be kept up to date if all packages which use chdir import
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| 122 | it from Cwd.
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| 123 |
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| 124 |
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| 125 | =head1 NOTES
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| 126 |
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| 127 | =over 4
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| 128 |
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| 129 | =item *
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| 130 |
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| 131 | Since the path seperators are different on some operating systems ('/'
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| 132 | on Unix, ':' on MacPerl, etc...) we recommend you use the File::Spec
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| 133 | modules wherever portability is a concern.
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| 134 |
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| 135 | =item *
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| 136 |
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| 137 | Actually, on Mac OS, the C<getcwd()>, C<fastgetcwd()> and C<fastcwd()>
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| 138 | functions are all aliases for the C<cwd()> function, which, on Mac OS,
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| 139 | calls `pwd`. Likewise, the C<abs_path()> function is an alias for
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| 140 | C<fast_abs_path()>.
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| 141 |
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| 142 | =back
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| 143 |
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| 144 | =head1 AUTHOR
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| 145 |
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| 146 | Originally by the perl5-porters.
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| 147 |
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| 148 | Maintained by Ken Williams <[email protected]>
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| 149 |
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| 150 | =head1 COPYRIGHT
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| 151 |
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| 152 | Copyright (c) 2004 by the Perl 5 Porters. All rights reserved.
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| 153 |
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| 154 | This program is free software; you can redistribute it and/or modify
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| 155 | it under the same terms as Perl itself.
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| 156 |
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| 157 | Portions of the C code in this library are copyright (c) 1994 by the
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| 158 | Regents of the University of California. All rights reserved. The
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| 159 | license on this code is compatible with the licensing of the rest of
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| 160 | the distribution - please see the source code in F<Cwd.xs> for the
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| 161 | details.
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| 162 |
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| 163 | =head1 SEE ALSO
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| 164 |
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| 165 | L<File::chdir>
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| 166 |
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| 167 | =cut
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| 168 |
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| 169 | use strict;
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| 170 | use Exporter;
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| 171 | use vars qw(@ISA @EXPORT @EXPORT_OK $VERSION);
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| 172 |
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| 173 | $VERSION = '3.12';
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| 174 |
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| 175 | @ISA = qw/ Exporter /;
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| 176 | @EXPORT = qw(cwd getcwd fastcwd fastgetcwd);
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| 177 | push @EXPORT, qw(getdcwd) if $^O eq 'MSWin32';
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| 178 | @EXPORT_OK = qw(chdir abs_path fast_abs_path realpath fast_realpath);
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| 179 |
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| 180 | # sys_cwd may keep the builtin command
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| 181 |
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| 182 | # All the functionality of this module may provided by builtins,
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| 183 | # there is no sense to process the rest of the file.
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| 184 | # The best choice may be to have this in BEGIN, but how to return from BEGIN?
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| 185 |
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| 186 | if ($^O eq 'os2') {
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| 187 | local $^W = 0;
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| 188 |
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| 189 | *cwd = defined &sys_cwd ? \&sys_cwd : \&_os2_cwd;
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| 190 | *getcwd = \&cwd;
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| 191 | *fastgetcwd = \&cwd;
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| 192 | *fastcwd = \&cwd;
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| 193 |
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| 194 | *fast_abs_path = \&sys_abspath if defined &sys_abspath;
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| 195 | *abs_path = \&fast_abs_path;
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| 196 | *realpath = \&fast_abs_path;
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| 197 | *fast_realpath = \&fast_abs_path;
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| 198 |
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| 199 | return 1;
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| 200 | }
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| 201 |
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| 202 | # If loading the XS stuff doesn't work, we can fall back to pure perl
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| 203 | eval {
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| 204 | if ( $] >= 5.006 ) {
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| 205 | require XSLoader;
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| 206 | XSLoader::load( __PACKAGE__, $VERSION );
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| 207 | } else {
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| 208 | require DynaLoader;
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| 209 | push @ISA, 'DynaLoader';
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| 210 | __PACKAGE__->bootstrap( $VERSION );
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| 211 | }
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| 212 | };
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| 213 |
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| 214 | # Must be after the DynaLoader stuff:
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| 215 | $VERSION = eval $VERSION;
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| 216 |
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| 217 | # Big nasty table of function aliases
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| 218 | my %METHOD_MAP =
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| 219 | (
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| 220 | VMS =>
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| 221 | {
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| 222 | cwd => '_vms_cwd',
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| 223 | getcwd => '_vms_cwd',
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| 224 | fastcwd => '_vms_cwd',
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| 225 | fastgetcwd => '_vms_cwd',
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| 226 | abs_path => '_vms_abs_path',
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| 227 | fast_abs_path => '_vms_abs_path',
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| 228 | },
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| 229 |
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| 230 | MSWin32 =>
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| 231 | {
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| 232 | # We assume that &_NT_cwd is defined as an XSUB or in the core.
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| 233 | cwd => '_NT_cwd',
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| 234 | getcwd => '_NT_cwd',
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| 235 | fastcwd => '_NT_cwd',
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| 236 | fastgetcwd => '_NT_cwd',
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| 237 | abs_path => 'fast_abs_path',
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| 238 | realpath => 'fast_abs_path',
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| 239 | },
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| 240 |
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| 241 | dos =>
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| 242 | {
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| 243 | cwd => '_dos_cwd',
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| 244 | getcwd => '_dos_cwd',
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| 245 | fastgetcwd => '_dos_cwd',
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| 246 | fastcwd => '_dos_cwd',
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| 247 | abs_path => 'fast_abs_path',
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| 248 | },
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| 249 |
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| 250 | qnx =>
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| 251 | {
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| 252 | cwd => '_qnx_cwd',
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| 253 | getcwd => '_qnx_cwd',
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| 254 | fastgetcwd => '_qnx_cwd',
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| 255 | fastcwd => '_qnx_cwd',
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| 256 | abs_path => '_qnx_abs_path',
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| 257 | fast_abs_path => '_qnx_abs_path',
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| 258 | },
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| 259 |
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| 260 | cygwin =>
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| 261 | {
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| 262 | getcwd => 'cwd',
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| 263 | fastgetcwd => 'cwd',
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| 264 | fastcwd => 'cwd',
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| 265 | abs_path => 'fast_abs_path',
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| 266 | realpath => 'fast_abs_path',
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| 267 | },
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| 268 |
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| 269 | epoc =>
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| 270 | {
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| 271 | cwd => '_epoc_cwd',
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| 272 | getcwd => '_epoc_cwd',
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| 273 | fastgetcwd => '_epoc_cwd',
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| 274 | fastcwd => '_epoc_cwd',
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| 275 | abs_path => 'fast_abs_path',
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| 276 | },
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| 277 |
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| 278 | MacOS =>
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| 279 | {
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| 280 | getcwd => 'cwd',
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| 281 | fastgetcwd => 'cwd',
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| 282 | fastcwd => 'cwd',
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| 283 | abs_path => 'fast_abs_path',
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| 284 | },
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| 285 | );
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| 286 |
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| 287 | $METHOD_MAP{NT} = $METHOD_MAP{MSWin32};
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| 288 | $METHOD_MAP{nto} = $METHOD_MAP{qnx};
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| 289 |
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| 290 |
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| 291 | # Find the pwd command in the expected locations. We assume these
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| 292 | # are safe. This prevents _backtick_pwd() consulting $ENV{PATH}
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| 293 | # so everything works under taint mode.
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| 294 | my $pwd_cmd;
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| 295 | foreach my $try ('/bin/pwd',
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| 296 | '/usr/bin/pwd',
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| 297 | '/QOpenSys/bin/pwd', # OS/400 PASE.
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| 298 | ) {
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| 299 |
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| 300 | if( -x $try ) {
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| 301 | $pwd_cmd = $try;
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| 302 | last;
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| 303 | }
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| 304 | }
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| 305 | unless ($pwd_cmd) {
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| 306 | # Isn't this wrong? _backtick_pwd() will fail if somenone has
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| 307 | # pwd in their path but it is not /bin/pwd or /usr/bin/pwd?
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| 308 | # See [perl #16774]. --jhi
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| 309 | $pwd_cmd = 'pwd';
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| 310 | }
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| 311 |
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| 312 | # Lazy-load Carp
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| 313 | sub _carp { require Carp; Carp::carp(@_) }
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| 314 | sub _croak { require Carp; Carp::croak(@_) }
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| 315 |
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| 316 | # The 'natural and safe form' for UNIX (pwd may be setuid root)
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| 317 | sub _backtick_pwd {
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| 318 | # Localize %ENV entries in a way that won't create new hash keys
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| 319 | my @localize = grep exists $ENV{$_}, qw(PATH IFS CDPATH ENV BASH_ENV);
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| 320 | local @ENV{@localize};
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| 321 |
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| 322 | my $cwd = `$pwd_cmd`;
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| 323 | # Belt-and-suspenders in case someone said "undef $/".
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| 324 | local $/ = "\n";
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| 325 | # `pwd` may fail e.g. if the disk is full
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| 326 | chomp($cwd) if defined $cwd;
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| 327 | $cwd;
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| 328 | }
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| 329 |
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| 330 | # Since some ports may predefine cwd internally (e.g., NT)
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| 331 | # we take care not to override an existing definition for cwd().
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| 332 |
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| 333 | unless ($METHOD_MAP{$^O}{cwd} or defined &cwd) {
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| 334 | # The pwd command is not available in some chroot(2)'ed environments
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| 335 | my $sep = $Config::Config{path_sep} || ':';
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| 336 | my $os = $^O; # Protect $^O from tainting
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| 337 | if( $os eq 'MacOS' || (defined $ENV{PATH} &&
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| 338 | $os ne 'MSWin32' && # no pwd on Windows
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| 339 | grep { -x "$_/pwd" } split($sep, $ENV{PATH})) )
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| 340 | {
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| 341 | *cwd = \&_backtick_pwd;
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| 342 | }
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| 343 | else {
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| 344 | *cwd = \&getcwd;
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| 345 | }
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| 346 | }
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| 347 |
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| 348 | # set a reasonable (and very safe) default for fastgetcwd, in case it
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| 349 | # isn't redefined later (20001212 rspier)
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| 350 | *fastgetcwd = \&cwd;
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| 351 |
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| 352 | # By Brandon S. Allbery
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| 353 | #
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| 354 | # Usage: $cwd = getcwd();
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| 355 |
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| 356 | sub getcwd
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| 357 | {
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| 358 | abs_path('.');
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| 359 | }
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| 360 |
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| 361 |
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| 362 | # By John Bazik
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| 363 | #
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| 364 | # Usage: $cwd = &fastcwd;
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| 365 | #
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| 366 | # This is a faster version of getcwd. It's also more dangerous because
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| 367 | # you might chdir out of a directory that you can't chdir back into.
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| 368 |
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| 369 | sub fastcwd_ {
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| 370 | my($odev, $oino, $cdev, $cino, $tdev, $tino);
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| 371 | my(@path, $path);
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| 372 | local(*DIR);
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| 373 |
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| 374 | my($orig_cdev, $orig_cino) = stat('.');
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| 375 | ($cdev, $cino) = ($orig_cdev, $orig_cino);
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| 376 | for (;;) {
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| 377 | my $direntry;
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| 378 | ($odev, $oino) = ($cdev, $cino);
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| 379 | CORE::chdir('..') || return undef;
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| 380 | ($cdev, $cino) = stat('.');
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| 381 | last if $odev == $cdev && $oino == $cino;
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| 382 | opendir(DIR, '.') || return undef;
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| 383 | for (;;) {
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| 384 | $direntry = readdir(DIR);
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| 385 | last unless defined $direntry;
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| 386 | next if $direntry eq '.';
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| 387 | next if $direntry eq '..';
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| 388 |
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| 389 | ($tdev, $tino) = lstat($direntry);
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| 390 | last unless $tdev != $odev || $tino != $oino;
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| 391 | }
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| 392 | closedir(DIR);
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| 393 | return undef unless defined $direntry; # should never happen
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| 394 | unshift(@path, $direntry);
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| 395 | }
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| 396 | $path = '/' . join('/', @path);
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| 397 | if ($^O eq 'apollo') { $path = "/".$path; }
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| 398 | # At this point $path may be tainted (if tainting) and chdir would fail.
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| 399 | # Untaint it then check that we landed where we started.
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| 400 | $path =~ /^(.*)\z/s # untaint
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| 401 | && CORE::chdir($1) or return undef;
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| 402 | ($cdev, $cino) = stat('.');
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| 403 | die "Unstable directory path, current directory changed unexpectedly"
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| 404 | if $cdev != $orig_cdev || $cino != $orig_cino;
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| 405 | $path;
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| 406 | }
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| 407 | if (not defined &fastcwd) { *fastcwd = \&fastcwd_ }
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| 408 |
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| 409 |
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| 410 | # Keeps track of current working directory in PWD environment var
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| 411 | # Usage:
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| 412 | # use Cwd 'chdir';
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| 413 | # chdir $newdir;
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| 414 |
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| 415 | my $chdir_init = 0;
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| 416 |
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| 417 | sub chdir_init {
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| 418 | if ($ENV{'PWD'} and $^O ne 'os2' and $^O ne 'dos' and $^O ne 'MSWin32') {
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| 419 | my($dd,$di) = stat('.');
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| 420 | my($pd,$pi) = stat($ENV{'PWD'});
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|---|
| 421 | if (!defined $dd or !defined $pd or $di != $pi or $dd != $pd) {
|
|---|
| 422 | $ENV{'PWD'} = cwd();
|
|---|
| 423 | }
|
|---|
| 424 | }
|
|---|
| 425 | else {
|
|---|
| 426 | my $wd = cwd();
|
|---|
| 427 | $wd = Win32::GetFullPathName($wd) if $^O eq 'MSWin32';
|
|---|
| 428 | $ENV{'PWD'} = $wd;
|
|---|
| 429 | }
|
|---|
| 430 | # Strip an automounter prefix (where /tmp_mnt/foo/bar == /foo/bar)
|
|---|
| 431 | if ($^O ne 'MSWin32' and $ENV{'PWD'} =~ m|(/[^/]+(/[^/]+/[^/]+))(.*)|s) {
|
|---|
| 432 | my($pd,$pi) = stat($2);
|
|---|
| 433 | my($dd,$di) = stat($1);
|
|---|
| 434 | if (defined $pd and defined $dd and $di == $pi and $dd == $pd) {
|
|---|
| 435 | $ENV{'PWD'}="$2$3";
|
|---|
| 436 | }
|
|---|
| 437 | }
|
|---|
| 438 | $chdir_init = 1;
|
|---|
| 439 | }
|
|---|
| 440 |
|
|---|
| 441 | sub chdir {
|
|---|
| 442 | my $newdir = @_ ? shift : ''; # allow for no arg (chdir to HOME dir)
|
|---|
| 443 | $newdir =~ s|///*|/|g unless $^O eq 'MSWin32';
|
|---|
| 444 | chdir_init() unless $chdir_init;
|
|---|
| 445 | my $newpwd;
|
|---|
| 446 | if ($^O eq 'MSWin32') {
|
|---|
| 447 | # get the full path name *before* the chdir()
|
|---|
| 448 | $newpwd = Win32::GetFullPathName($newdir);
|
|---|
| 449 | }
|
|---|
| 450 |
|
|---|
| 451 | return 0 unless CORE::chdir $newdir;
|
|---|
| 452 |
|
|---|
| 453 | if ($^O eq 'VMS') {
|
|---|
| 454 | return $ENV{'PWD'} = $ENV{'DEFAULT'}
|
|---|
| 455 | }
|
|---|
| 456 | elsif ($^O eq 'MacOS') {
|
|---|
| 457 | return $ENV{'PWD'} = cwd();
|
|---|
| 458 | }
|
|---|
| 459 | elsif ($^O eq 'MSWin32') {
|
|---|
| 460 | $ENV{'PWD'} = $newpwd;
|
|---|
| 461 | return 1;
|
|---|
| 462 | }
|
|---|
| 463 |
|
|---|
| 464 | if ($newdir =~ m#^/#s) {
|
|---|
| 465 | $ENV{'PWD'} = $newdir;
|
|---|
| 466 | } else {
|
|---|
| 467 | my @curdir = split(m#/#,$ENV{'PWD'});
|
|---|
| 468 | @curdir = ('') unless @curdir;
|
|---|
| 469 | my $component;
|
|---|
| 470 | foreach $component (split(m#/#, $newdir)) {
|
|---|
| 471 | next if $component eq '.';
|
|---|
| 472 | pop(@curdir),next if $component eq '..';
|
|---|
| 473 | push(@curdir,$component);
|
|---|
| 474 | }
|
|---|
| 475 | $ENV{'PWD'} = join('/',@curdir) || '/';
|
|---|
| 476 | }
|
|---|
| 477 | 1;
|
|---|
| 478 | }
|
|---|
| 479 |
|
|---|
| 480 |
|
|---|
| 481 | sub _perl_abs_path
|
|---|
| 482 | {
|
|---|
| 483 | my $start = @_ ? shift : '.';
|
|---|
| 484 | my($dotdots, $cwd, @pst, @cst, $dir, @tst);
|
|---|
| 485 |
|
|---|
| 486 | unless (@cst = stat( $start ))
|
|---|
| 487 | {
|
|---|
| 488 | _carp("stat($start): $!");
|
|---|
| 489 | return '';
|
|---|
| 490 | }
|
|---|
| 491 |
|
|---|
| 492 | unless (-d _) {
|
|---|
| 493 | # Make sure we can be invoked on plain files, not just directories.
|
|---|
| 494 | # NOTE that this routine assumes that '/' is the only directory separator.
|
|---|
| 495 |
|
|---|
| 496 | my ($dir, $file) = $start =~ m{^(.*)/(.+)$}
|
|---|
| 497 | or return cwd() . '/' . $start;
|
|---|
| 498 |
|
|---|
| 499 | # Can't use "-l _" here, because the previous stat was a stat(), not an lstat().
|
|---|
| 500 | if (-l $start) {
|
|---|
| 501 | my $link_target = readlink($start);
|
|---|
| 502 | die "Can't resolve link $start: $!" unless defined $link_target;
|
|---|
| 503 |
|
|---|
| 504 | require File::Spec;
|
|---|
| 505 | $link_target = $dir . '/' . $link_target
|
|---|
| 506 | unless File::Spec->file_name_is_absolute($link_target);
|
|---|
| 507 |
|
|---|
| 508 | return abs_path($link_target);
|
|---|
| 509 | }
|
|---|
| 510 |
|
|---|
| 511 | return $dir ? abs_path($dir) . "/$file" : "/$file";
|
|---|
| 512 | }
|
|---|
| 513 |
|
|---|
| 514 | $cwd = '';
|
|---|
| 515 | $dotdots = $start;
|
|---|
| 516 | do
|
|---|
| 517 | {
|
|---|
| 518 | $dotdots .= '/..';
|
|---|
| 519 | @pst = @cst;
|
|---|
| 520 | local *PARENT;
|
|---|
| 521 | unless (opendir(PARENT, $dotdots))
|
|---|
| 522 | {
|
|---|
| 523 | _carp("opendir($dotdots): $!");
|
|---|
| 524 | return '';
|
|---|
| 525 | }
|
|---|
| 526 | unless (@cst = stat($dotdots))
|
|---|
| 527 | {
|
|---|
| 528 | _carp("stat($dotdots): $!");
|
|---|
| 529 | closedir(PARENT);
|
|---|
| 530 | return '';
|
|---|
| 531 | }
|
|---|
| 532 | if ($pst[0] == $cst[0] && $pst[1] == $cst[1])
|
|---|
| 533 | {
|
|---|
| 534 | $dir = undef;
|
|---|
| 535 | }
|
|---|
| 536 | else
|
|---|
| 537 | {
|
|---|
| 538 | do
|
|---|
| 539 | {
|
|---|
| 540 | unless (defined ($dir = readdir(PARENT)))
|
|---|
| 541 | {
|
|---|
| 542 | _carp("readdir($dotdots): $!");
|
|---|
| 543 | closedir(PARENT);
|
|---|
| 544 | return '';
|
|---|
| 545 | }
|
|---|
| 546 | $tst[0] = $pst[0]+1 unless (@tst = lstat("$dotdots/$dir"))
|
|---|
| 547 | }
|
|---|
| 548 | while ($dir eq '.' || $dir eq '..' || $tst[0] != $pst[0] ||
|
|---|
| 549 | $tst[1] != $pst[1]);
|
|---|
| 550 | }
|
|---|
| 551 | $cwd = (defined $dir ? "$dir" : "" ) . "/$cwd" ;
|
|---|
| 552 | closedir(PARENT);
|
|---|
| 553 | } while (defined $dir);
|
|---|
| 554 | chop($cwd) unless $cwd eq '/'; # drop the trailing /
|
|---|
| 555 | $cwd;
|
|---|
| 556 | }
|
|---|
| 557 |
|
|---|
| 558 |
|
|---|
| 559 | my $Curdir;
|
|---|
| 560 | sub fast_abs_path {
|
|---|
| 561 | local $ENV{PWD} = $ENV{PWD} || ''; # Guard against clobberage
|
|---|
| 562 | my $cwd = getcwd();
|
|---|
| 563 | require File::Spec;
|
|---|
| 564 | my $path = @_ ? shift : ($Curdir ||= File::Spec->curdir);
|
|---|
| 565 |
|
|---|
| 566 | # Detaint else we'll explode in taint mode. This is safe because
|
|---|
| 567 | # we're not doing anything dangerous with it.
|
|---|
| 568 | ($path) = $path =~ /(.*)/;
|
|---|
| 569 | ($cwd) = $cwd =~ /(.*)/;
|
|---|
| 570 |
|
|---|
| 571 | unless (-e $path) {
|
|---|
| 572 | _croak("$path: No such file or directory");
|
|---|
| 573 | }
|
|---|
| 574 |
|
|---|
| 575 | unless (-d _) {
|
|---|
| 576 | # Make sure we can be invoked on plain files, not just directories.
|
|---|
| 577 |
|
|---|
| 578 | my ($vol, $dir, $file) = File::Spec->splitpath($path);
|
|---|
| 579 | return File::Spec->catfile($cwd, $path) unless length $dir;
|
|---|
| 580 |
|
|---|
| 581 | if (-l $path) {
|
|---|
| 582 | my $link_target = readlink($path);
|
|---|
| 583 | die "Can't resolve link $path: $!" unless defined $link_target;
|
|---|
| 584 |
|
|---|
| 585 | $link_target = File::Spec->catpath($vol, $dir, $link_target)
|
|---|
| 586 | unless File::Spec->file_name_is_absolute($link_target);
|
|---|
| 587 |
|
|---|
| 588 | return fast_abs_path($link_target);
|
|---|
| 589 | }
|
|---|
| 590 |
|
|---|
| 591 | return $dir eq File::Spec->rootdir
|
|---|
| 592 | ? File::Spec->catpath($vol, $dir, $file)
|
|---|
| 593 | : fast_abs_path(File::Spec->catpath($vol, $dir, '')) . '/' . $file;
|
|---|
| 594 | }
|
|---|
| 595 |
|
|---|
| 596 | if (!CORE::chdir($path)) {
|
|---|
| 597 | _croak("Cannot chdir to $path: $!");
|
|---|
| 598 | }
|
|---|
| 599 | my $realpath = getcwd();
|
|---|
| 600 | if (! ((-d $cwd) && (CORE::chdir($cwd)))) {
|
|---|
| 601 | _croak("Cannot chdir back to $cwd: $!");
|
|---|
| 602 | }
|
|---|
| 603 | $realpath;
|
|---|
| 604 | }
|
|---|
| 605 |
|
|---|
| 606 | # added function alias to follow principle of least surprise
|
|---|
| 607 | # based on previous aliasing. --tchrist 27-Jan-00
|
|---|
| 608 | *fast_realpath = \&fast_abs_path;
|
|---|
| 609 |
|
|---|
| 610 |
|
|---|
| 611 | # --- PORTING SECTION ---
|
|---|
| 612 |
|
|---|
| 613 | # VMS: $ENV{'DEFAULT'} points to default directory at all times
|
|---|
| 614 | # 06-Mar-1996 Charles Bailey [email protected]
|
|---|
| 615 | # Note: Use of Cwd::chdir() causes the logical name PWD to be defined
|
|---|
| 616 | # in the process logical name table as the default device and directory
|
|---|
| 617 | # seen by Perl. This may not be the same as the default device
|
|---|
| 618 | # and directory seen by DCL after Perl exits, since the effects
|
|---|
| 619 | # the CRTL chdir() function persist only until Perl exits.
|
|---|
| 620 |
|
|---|
| 621 | sub _vms_cwd {
|
|---|
| 622 | return $ENV{'DEFAULT'};
|
|---|
| 623 | }
|
|---|
| 624 |
|
|---|
| 625 | sub _vms_abs_path {
|
|---|
| 626 | return $ENV{'DEFAULT'} unless @_;
|
|---|
| 627 |
|
|---|
| 628 | # may need to turn foo.dir into [.foo]
|
|---|
| 629 | my $path = VMS::Filespec::pathify($_[0]);
|
|---|
| 630 | $path = $_[0] unless defined $path;
|
|---|
| 631 |
|
|---|
| 632 | return VMS::Filespec::rmsexpand($path);
|
|---|
| 633 | }
|
|---|
| 634 |
|
|---|
| 635 | sub _os2_cwd {
|
|---|
| 636 | $ENV{'PWD'} = `cmd /c cd`;
|
|---|
| 637 | chomp $ENV{'PWD'};
|
|---|
| 638 | $ENV{'PWD'} =~ s:\\:/:g ;
|
|---|
| 639 | return $ENV{'PWD'};
|
|---|
| 640 | }
|
|---|
| 641 |
|
|---|
| 642 | sub _win32_cwd {
|
|---|
| 643 | $ENV{'PWD'} = Win32::GetCwd();
|
|---|
| 644 | $ENV{'PWD'} =~ s:\\:/:g ;
|
|---|
| 645 | return $ENV{'PWD'};
|
|---|
| 646 | }
|
|---|
| 647 |
|
|---|
| 648 | *_NT_cwd = defined &Win32::GetCwd ? \&_win32_cwd : \&_os2_cwd;
|
|---|
| 649 |
|
|---|
| 650 | sub _dos_cwd {
|
|---|
| 651 | if (!defined &Dos::GetCwd) {
|
|---|
| 652 | $ENV{'PWD'} = `command /c cd`;
|
|---|
| 653 | chomp $ENV{'PWD'};
|
|---|
| 654 | $ENV{'PWD'} =~ s:\\:/:g ;
|
|---|
| 655 | } else {
|
|---|
| 656 | $ENV{'PWD'} = Dos::GetCwd();
|
|---|
| 657 | }
|
|---|
| 658 | return $ENV{'PWD'};
|
|---|
| 659 | }
|
|---|
| 660 |
|
|---|
| 661 | sub _qnx_cwd {
|
|---|
| 662 | local $ENV{PATH} = '';
|
|---|
| 663 | local $ENV{CDPATH} = '';
|
|---|
| 664 | local $ENV{ENV} = '';
|
|---|
| 665 | $ENV{'PWD'} = `/usr/bin/fullpath -t`;
|
|---|
| 666 | chomp $ENV{'PWD'};
|
|---|
| 667 | return $ENV{'PWD'};
|
|---|
| 668 | }
|
|---|
| 669 |
|
|---|
| 670 | sub _qnx_abs_path {
|
|---|
| 671 | local $ENV{PATH} = '';
|
|---|
| 672 | local $ENV{CDPATH} = '';
|
|---|
| 673 | local $ENV{ENV} = '';
|
|---|
| 674 | my $path = @_ ? shift : '.';
|
|---|
| 675 | local *REALPATH;
|
|---|
| 676 |
|
|---|
| 677 | defined( open(REALPATH, '-|') || exec '/usr/bin/fullpath', '-t', $path ) or
|
|---|
| 678 | die "Can't open /usr/bin/fullpath: $!";
|
|---|
| 679 | my $realpath = <REALPATH>;
|
|---|
| 680 | close REALPATH;
|
|---|
| 681 | chomp $realpath;
|
|---|
| 682 | return $realpath;
|
|---|
| 683 | }
|
|---|
| 684 |
|
|---|
| 685 | sub _epoc_cwd {
|
|---|
| 686 | $ENV{'PWD'} = EPOC::getcwd();
|
|---|
| 687 | return $ENV{'PWD'};
|
|---|
| 688 | }
|
|---|
| 689 |
|
|---|
| 690 |
|
|---|
| 691 | # Now that all the base-level functions are set up, alias the
|
|---|
| 692 | # user-level functions to the right places
|
|---|
| 693 |
|
|---|
| 694 | if (exists $METHOD_MAP{$^O}) {
|
|---|
| 695 | my $map = $METHOD_MAP{$^O};
|
|---|
| 696 | foreach my $name (keys %$map) {
|
|---|
| 697 | local $^W = 0; # assignments trigger 'subroutine redefined' warning
|
|---|
| 698 | no strict 'refs';
|
|---|
| 699 | *{$name} = \&{$map->{$name}};
|
|---|
| 700 | }
|
|---|
| 701 | }
|
|---|
| 702 |
|
|---|
| 703 | # In case the XS version doesn't load.
|
|---|
| 704 | *abs_path = \&_perl_abs_path unless defined &abs_path;
|
|---|
| 705 |
|
|---|
| 706 | # added function alias for those of us more
|
|---|
| 707 | # used to the libc function. --tchrist 27-Jan-00
|
|---|
| 708 | *realpath = \&abs_path;
|
|---|
| 709 |
|
|---|
| 710 | 1;
|
|---|
