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- # 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;
-