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- #!perl5
- #
- # The contents of this file are subject to the Netscape Public License
- # Version 1.0 (the "NPL"); you may not use this file except in
- # compliance with the NPL. You may obtain a copy of the NPL at
- # http://www.mozilla.org/NPL/
- #
- # Software distributed under the NPL is distributed on an "AS IS" basis,
- # WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
- # for the specific language governing rights and limitations under the
- # NPL.
- #
- # The Initial Developer of this code under the NPL is Netscape
- # Communications Corporation. Portions created by Netscape are
- # Copyright (C) 1998 Netscape Communications Corporation. All Rights
- # Reserved.
- #
- # By John Bazik
- #
- # Usage: $cwd = &fastcwd;
- #
- # This is a faster version of getcwd. It's also more dangerous because
- # you might chdir out of a directory that you can't chdir back into.
- #
-
- sub fastcwd {
- local($odev, $oino, $cdev, $cino, $tdev, $tino);
- local(@path, $path);
- local(*DIR);
-
- ($cdev, $cino) = stat('.');
- for (;;) {
- ($odev, $oino) = ($cdev, $cino);
- chdir('..');
- ($cdev, $cino) = stat('.');
- last if $odev == $cdev && $oino == $cino;
- opendir(DIR, '.');
- for (;;) {
- $_ = readdir(DIR);
- next if $_ eq '.';
- next if $_ eq '..';
-
- last unless $_;
- ($tdev, $tino) = lstat($_);
- last unless $tdev != $odev || $tino != $oino;
- }
- closedir(DIR);
- unshift(@path, $_);
- }
- chdir($path = '/' . join('/', @path));
- $path;
- }
- 1;
-