Commit | Line | Data |
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00bf170e LW |
1 | ;# pwd.pl - keeps track of current working directory in PWD environment var |
2 | ;# | |
79072805 | 3 | ;# $RCSfile: pwd.pl,v $$Revision: 4.1 $$Date: 92/08/07 18:24:11 $ |
00bf170e LW |
4 | ;# |
5 | ;# $Log: pwd.pl,v $ | |
00bf170e LW |
6 | ;# |
7 | ;# Usage: | |
8 | ;# require "pwd.pl"; | |
9 | ;# &initpwd; | |
10 | ;# ... | |
11 | ;# &chdir($newdir); | |
12 | ||
13 | package pwd; | |
14 | ||
15 | sub main'initpwd { | |
16 | if ($ENV{'PWD'}) { | |
17 | local($dd,$di) = stat('.'); | |
18 | local($pd,$pi) = stat($ENV{'PWD'}); | |
32c2e4fb LW |
19 | if ($di != $pi || $dd != $pd) { |
20 | chop($ENV{'PWD'} = `pwd`); | |
21 | } | |
22 | } | |
23 | else { | |
24 | chop($ENV{'PWD'} = `pwd`); | |
25 | } | |
26 | if ($ENV{'PWD'} =~ m|(/[^/]+(/[^/]+/[^/]+))(.*)|) { | |
27 | local($pd,$pi) = stat($2); | |
28 | local($dd,$di) = stat($1); | |
29 | if ($di == $pi && $dd == $pd) { | |
30 | $ENV{'PWD'}="$2$3"; | |
31 | } | |
00bf170e | 32 | } |
00bf170e LW |
33 | } |
34 | ||
35 | sub main'chdir { | |
36 | local($newdir) = shift; | |
748a9306 | 37 | $newdir =~ s|/{2,}|/|g; |
00bf170e LW |
38 | if (chdir $newdir) { |
39 | if ($newdir =~ m#^/#) { | |
40 | $ENV{'PWD'} = $newdir; | |
41 | } | |
42 | else { | |
43 | local(@curdir) = split(m#/#,$ENV{'PWD'}); | |
44 | @curdir = '' unless @curdir; | |
45 | foreach $component (split(m#/#, $newdir)) { | |
46 | next if $component eq '.'; | |
47 | pop(@curdir),next if $component eq '..'; | |
48 | push(@curdir,$component); | |
49 | } | |
50 | $ENV{'PWD'} = join('/',@curdir) || '/'; | |
51 | } | |
52 | } | |
53 | else { | |
54 | 0; | |
55 | } | |
56 | } | |
57 | ||
27e2fb84 | 58 | 1; |