diff --git a/lib/m2/ioctl.c b/lib/m2/ioctl.c
new file mode 100644
index 00000000..35654531
--- /dev/null
+++ b/lib/m2/ioctl.c
@@ -0,0 +1,34 @@
+/* -*-comment-start: "//";comment-end:""-*-
+ * GNU Mes --- Maxwell Equations of Software
+ * Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
+ *
+ * This file is part of GNU Mes.
+ *
+ * GNU Mes 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 3 of the License, or (at
+ * your option) any later version.
+ *
+ * GNU Mes 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 GNU Mes.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/syscall.h>
+#include <syscall.h>
+#include <stdarg.h>
+#include <sys/ioctl.h>
+
+int
+ioctl (int filedes, long command, int data)
+{
+  long long_filedes = filedes;
+  long long_command = command;
+  long long_data = data;
+  int r = _sys_call3 (SYS_ioctl, long_filedes, long_command, long_data);
+  return r;
+}