new file mode 100644
--- /dev/null
+++ b/src/oct-prcstrm.cc
@@ -0,0 +1,81 @@
+/*
+
+Copyright (C) 1996 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, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <cstdio>
+
+#include "oct-prcstrm.h"
+
+octave_iprocstream::octave_iprocstream (const string& n,
+					ios::openmode arg_md,
+					arch_type arg_at)
+  : octave_istdiostream (n, 0, arg_md, arg_at)
+{
+  fp = popen (n.c_str (), "r");
+
+  if (fp)
+    {
+      delete is;
+      is = new istdiostream (fp);
+    }
+}
+
+octave_iprocstream::~octave_iprocstream (void)
+{
+  if (fp)
+    {
+      pclose (fp);
+      fp = 0;
+    }
+}
+
+octave_oprocstream::octave_oprocstream (const string& n,
+					ios::openmode arg_md,
+					arch_type arg_at)
+  : octave_ostdiostream (n, 0, arg_md, arg_at)
+{
+  fp = popen (n.c_str (), "w");
+
+  if (fp)
+    {
+      delete os;
+      os = new ostdiostream (fp);
+    }
+}
+
+octave_oprocstream::~octave_oprocstream (void)
+{
+  if (fp)
+    {
+      pclose (fp);
+      fp = 0;
+    }
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; End: ***
+*/