Initial commit of OpenSPARC T2 architecture model.

[OpenSPARC-T2-SAM] / sam-t2 / devtools / amd64 / lib / perl5 / 5.8.8 / pwd.pl

;# pwd.pl - keeps track of current working directory in PWD environment var
;#
#
# This library is no longer being maintained, and is included for backward
# compatibility with Perl 4 programs which may require it.
#
# In particular, this should not be used as an example of modern Perl
# programming techniques.
#
# Suggested alternative: Cwd
#
;# $RCSfile: pwd.pl,v $$Revision: 4.1 $$Date: 92/08/07 18:24:11 $
;#
;# $Log:        pwd.pl,v $
;#
;# 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 (!defined $dd or !defined $pd or $di != $pi or $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 (defined $pd and defined $dd and $di == $pi and $dd == $pd) {
           $ENV{'PWD'}="$2$3";
       }
   }
}

sub main'chdir {
   local($newdir) = shift;
   $newdir =~ s|/{2,}|/|g;
   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;