Commit | Line | Data |
---|---|---|
99b89507 LW |
1 | # By John Bazik |
2 | # | |
3 | # Usage: $cwd = &fastcwd; | |
4 | # | |
5 | # This is a faster version of getcwd. It's also more dangerous because | |
6 | # you might chdir out of a directory that you can't chdir back into. | |
7 | ||
8 | sub fastcwd { | |
9 | local($odev, $oino, $cdev, $cino, $tdev, $tino); | |
10 | local(@path, $path); | |
11 | local(*DIR); | |
12 | ||
13 | ($cdev, $cino) = stat('.'); | |
14 | for (;;) { | |
15 | ($odev, $oino) = ($cdev, $cino); | |
16 | chdir('..'); | |
17 | ($cdev, $cino) = stat('.'); | |
18 | last if $odev == $cdev && $oino == $cino; | |
19 | opendir(DIR, '.'); | |
20 | for (;;) { | |
21 | $_ = readdir(DIR); | |
22 | next if $_ eq '.'; | |
23 | next if $_ eq '..'; | |
24 | ||
25 | last unless $_; | |
26 | ($tdev, $tino) = lstat($_); | |
27 | last unless $tdev != $odev || $tino != $oino; | |
28 | } | |
29 | closedir(DIR); | |
30 | unshift(@path, $_); | |
31 | } | |
32 | chdir($path = '/' . join('/', @path)); | |
33 | $path; | |
34 | } | |
35 | 1; |