new file mode 100644
--- /dev/null
+++ b/src/oct-procbuf.h
@@ -0,0 +1,70 @@
+/*
+
+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.
+
+*/
+
+// This class is based on the procbuf class from libg++, written by
+// Per Bothner, Copyright (C) 1993 Free Software Foundation.
+
+#if !defined (octave_octave_procbuf_h)
+#define octave_octave_procbuf_h 1
+
+#include <streambuf.h>
+
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+class
+octave_procbuf : public filebuf
+{
+public:
+
+  octave_procbuf (void)
+    : filebuf (), proc_pid (-1), next (0) { }
+
+  octave_procbuf (const char *command, int mode)
+    : filebuf (), proc_pid (-1), next (0) { open (command, mode); }
+
+  ~octave_procbuf (void) { close (); }
+
+  octave_procbuf *open (const char *command, int mode);
+
+  octave_procbuf *close (void)
+    { return (octave_procbuf *) filebuf::close (); }
+
+  virtual int sys_close (void);
+
+  pid_t pid (void) { return proc_pid; }
+
+protected:
+
+  pid_t proc_pid;
+
+  octave_procbuf *next;
+};
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; End: ***
+*/