;# pwd.pl - keeps track of current working directory in PWD environment var ;# ;# $RCSfile: pwd.pl,v $$Revision: 1.1.1.1 $$Date: 1993/08/23 21:29:52 $ ;# ;# $Log: pwd.pl,v $ # Revision 1.1.1.1 1993/08/23 21:29:52 nate # PERL! # ;# Revision 4.0.1.1 92/06/08 13:45:22 lwall ;# patch20: support added to pwd.pl to strip automounter crud ;# ;# Revision 4.0 91/03/20 01:26:03 lwall ;# 4.0 baseline. ;# ;# Revision 3.0.1.2 91/01/11 18:09:24 lwall ;# patch42: some .pl files were missing their trailing 1; ;# ;# Revision 3.0.1.1 90/08/09 04:01:24 lwall ;# patch19: Initial revision ;# ;# ;# Usage: ;# require "pwd.pl"; ;# &initpwd; ;# ... ;# &chdir($newdir); package pwd; sub main'initpwd { if ($ENV{'PWD'}) { local($dd,$di) = stat('.'); local($pd,$pi) = stat($ENV{'PWD'}); if ($di != $pi || $dd != $pd) { chop($ENV{'PWD'} = `pwd`); } } else { chop($ENV{'PWD'} = `pwd`); } if ($ENV{'PWD'} =~ m|(/[^/]+(/[^/]+/[^/]+))(.*)|) { local($pd,$pi) = stat($2); local($dd,$di) = stat($1); if ($di == $pi && $dd == $pd) { $ENV{'PWD'}="$2$3"; } } } sub main'chdir { local($newdir) = shift; if (chdir $newdir) { if ($newdir =~ m#^/#) { $ENV{'PWD'} = $newdir; } else { local(@curdir) = split(m#/#,$ENV{'PWD'}); @curdir = '' unless @curdir; foreach $component (split(m#/#, $newdir)) { next if $component eq '.'; pop(@curdir),next if $component eq '..'; push(@curdir,$component); } $ENV{'PWD'} = join('/',@curdir) || '/'; } } else { 0; } } 1;