add support for high bps on OS X

src/iossiospeed.c

@@ -0,0 +1,28 @@
+/*
+ * tio - a simple TTY terminal I/O application
+ *
+ * Copyright (c) 2017  Martin Lund
+ *
+ * This program 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
+ * of the License, or (at your option) any later version.
+ *
+ * This program 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 this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <sys/ioctl.h>
+#include <IOKit/serial/ioss.h>
+
+int iossiospeed(int fd, int baudrate)
+{
+    return ioctl(fd, IOSSIOSPEED, (char *)&baudrate);
+}