Commit | Line | Data |
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0111154e Z |
1 | warn "Legacy library @{[(caller(0))[6]]} will be removed from the Perl core distribution in the next major release. Please install it from the CPAN distribution Perl4::CoreLibs. It is being used at @{[(caller)[1]]}, line @{[(caller)[2]]}.\n"; |
2 | ||
99b89507 LW |
3 | # By John Bazik |
4 | # | |
a6d71656 GS |
5 | # This library is no longer being maintained, and is included for backward |
6 | # compatibility with Perl 4 programs which may require it. | |
2f8d2bfa S |
7 | # This legacy library is deprecated and will be removed in a future |
8 | # release of perl. | |
a6d71656 GS |
9 | # |
10 | # In particular, this should not be used as an example of modern Perl | |
11 | # programming techniques. | |
12 | # | |
13 | # Suggested alternative: Cwd | |
2f8d2bfa | 14 | |
99b89507 LW |
15 | # Usage: $cwd = &fastcwd; |
16 | # | |
17 | # This is a faster version of getcwd. It's also more dangerous because | |
18 | # you might chdir out of a directory that you can't chdir back into. | |
19 | ||
20 | sub fastcwd { | |
21 | local($odev, $oino, $cdev, $cino, $tdev, $tino); | |
22 | local(@path, $path); | |
23 | local(*DIR); | |
24 | ||
25 | ($cdev, $cino) = stat('.'); | |
26 | for (;;) { | |
27 | ($odev, $oino) = ($cdev, $cino); | |
28 | chdir('..'); | |
29 | ($cdev, $cino) = stat('.'); | |
30 | last if $odev == $cdev && $oino == $cino; | |
31 | opendir(DIR, '.'); | |
32 | for (;;) { | |
33 | $_ = readdir(DIR); | |
34 | next if $_ eq '.'; | |
35 | next if $_ eq '..'; | |
36 | ||
37 | last unless $_; | |
38 | ($tdev, $tino) = lstat($_); | |
39 | last unless $tdev != $odev || $tino != $oino; | |
40 | } | |
41 | closedir(DIR); | |
42 | unshift(@path, $_); | |
43 | } | |
44 | chdir($path = '/' . join('/', @path)); | |
45 | $path; | |
46 | } | |
47 | 1; |