new file mode 100644
--- /dev/null
+++ b/src/oct-errno.h
@@ -0,0 +1,77 @@
+// oct-errno.h.in
+/*
+
+Copyright (C) 2005 John W. Eaton
+
+This file is part of Octave.
+
+Octave is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+Octave is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with Octave; see the file COPYING.  If not, write to the Free
+Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA.
+
+*/
+
+#if !defined (octave_errno_h)
+#define octave_errno_h 1
+
+#include <map>
+#include <string>
+
+#include "oct-map.h"
+
+class
+octave_errno
+{
+protected:
+
+  octave_errno (void);
+
+public:
+
+  ~octave_errno (void) { }
+
+  static bool instance_ok (void);
+
+  static int lookup (const std::string& name);
+
+  static Octave_map list (void);
+
+  static int get (void) { return errno; }
+
+  static int set (int val)
+  {
+    int retval = errno;
+    errno = val;
+    return retval;
+  }
+
+private:
+
+  std::map<std::string, int> errno_tbl;
+
+  static octave_errno *instance;
+
+  int do_lookup (const std::string& name);
+
+  Octave_map do_list (void);
+};
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/