diff options
author | markm <markm@FreeBSD.org> | 1998-09-09 07:00:04 +0000 |
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committer | markm <markm@FreeBSD.org> | 1998-09-09 07:00:04 +0000 |
commit | 4fcbc3669aa997848e15198cc9fb856287a6788c (patch) | |
tree | 58b20e81687d6d5931f120b50802ed21225bf440 /contrib/perl5/lib/fastcwd.pl | |
download | FreeBSD-src-4fcbc3669aa997848e15198cc9fb856287a6788c.zip FreeBSD-src-4fcbc3669aa997848e15198cc9fb856287a6788c.tar.gz |
Initial import of Perl5. The king is dead; long live the king!
Diffstat (limited to 'contrib/perl5/lib/fastcwd.pl')
-rw-r--r-- | contrib/perl5/lib/fastcwd.pl | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/contrib/perl5/lib/fastcwd.pl b/contrib/perl5/lib/fastcwd.pl new file mode 100644 index 0000000..6b452e8 --- /dev/null +++ b/contrib/perl5/lib/fastcwd.pl @@ -0,0 +1,35 @@ +# 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; |