new file mode 100644
--- /dev/null
+++ b/src/procstream.cc
@@ -0,0 +1,62 @@
+// procstream.cc                                          -*- C++ -*-
+/*
+
+Copyright (C) 1992, 1993 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, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#ifdef __GNUG__
+#pragma implementation
+#endif
+
+#include "procstream.h"
+
+procstreambase::procstreambase (void)
+{
+  init (new procbuf ());
+}
+
+procstreambase::procstreambase (const char *command, int mode = ios::out)
+{
+  init (new procbuf ());
+  if (! rdbuf()->open (command, mode))
+    set (ios::badbit);
+}
+
+void
+procstreambase::open (const char *command, int mode = ios::out)
+{
+  clear ();
+  if (! rdbuf()->open (command, mode))
+    set (ios::badbit);
+}
+
+void
+procstreambase::close (void)
+{
+  if (! rdbuf()->close ())
+    set (ios::failbit);
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/