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-rw-r--r--Master/tlpkg/tlperl/lib/pwd.pl69
1 files changed, 69 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/pwd.pl b/Master/tlpkg/tlperl/lib/pwd.pl
new file mode 100644
index 00000000000..68b59fcc216
--- /dev/null
+++ b/Master/tlpkg/tlperl/lib/pwd.pl
@@ -0,0 +1,69 @@
+;# 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.
+# This legacy library is deprecated and will be removed in a future
+# release of perl.
+#
+# 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;