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