perl 4.0 patch 18: patch #11, continued

See patch #11.

1 files changed, 62 insertions, 0 deletions

diff --git a/lib/getcwd.pl b/lib/getcwd.pl
new file mode 100644
index 0000000000..114e8905c6
--- /dev/null
+++ b/lib/getcwd.pl
@@ -0,0 +1,62 @@
+# By Brandon S. Allbery
+#
+# Usage: $cwd = &getcwd;
+
+sub getcwd
+{
+    local($dotdots, $cwd, @pst, @cst, $dir, @tst);
+
+    unless (@cst = stat('.'))
+    {
+	warn "stat(.): $!";
+	return '';
+    }
+    $cwd = '';
+    do
+    {
+	$dotdots .= '/' if $dotdots;
+	$dotdots .= '..';
+	@pst = @cst;
+	unless (opendir(getcwd'PARENT, $dotdots))			#'))
+	{
+	    warn "opendir($dotdots): $!";
+	    return '';
+	}
+	unless (@cst = stat($dotdots))
+	{
+	    warn "stat($dotdots): $!";
+	    closedir(getcwd'PARENT);					#');
+	    return '';
+	}
+	if ($pst[$[] == $cst[$[] && $pst[$[ + 1] == $cst[$[ + 1])
+	{
+	    $dir = '';
+	}
+	else
+	{
+	    do
+	    {
+		unless ($dir = readdir(getcwd'PARENT))			#'))
+		{
+		    warn "readdir($dotdots): $!";
+		    closedir(getcwd'PARENT);				#');
+		    return '';
+		}
+		unless (@tst = stat("$dotdots/$dir"))
+		{
+		    warn "stat($dotdots/$dir): $!";
+		    closedir(getcwd'PARENT);				#');
+		    return '';
+		}
+	    }
+	    while ($dir eq '.' || $dir eq '..' || $tst[$[] != $pst[$[] ||
+		   $tst[$[ + 1] != $pst[$[ + 1]);
+	}
+	$cwd = "$dir/$cwd";
+	closedir(getcwd'PARENT);					#');
+    } while ($dir);
+    chop($cwd);
+    $cwd;
+}
+
+1;