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--- /dev/null
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@@ -0,0 +1,64 @@
+/* dostop.c                                              -*- 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 HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <sys/types.h>
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include <signal.h>
+#include <stdlib.h>
+
+/*
+ * All the STOP statements in the Fortran routines have been replaced
+ * with a call to XSTOPX, defined in the file libcruft/misc/xstopx.f.
+ *
+ * The XSTOPX function calls this function, which will send a SIGINT
+ * signal to the program that invoked it.
+ *
+ * Octave\'s SIGINT signal handler calls jump_to_top_level(), and the
+ * user will end up at the top level instead of the shell prompt.
+ *
+ * Programs that don\'t handle SIGINT will be interrupted.
+ */
+
+volatile void
+#if defined (F77_APPEND_UNDERSCORE)
+dostop_ (void)
+#else
+dostop (void)
+#endif
+{
+  kill (getpid (), SIGINT);
+  abort ();
+}
+
+/*
+;;; Local Variables: ***
+;;; mode: C ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/