serial: Open code tcsendbreak

This is a copy from libc6.

tcsendbreak() is defined in <termios.h>. This header however is
incompatible with <linux/termios.h>, which in turn is needed to make use
of TCSETS2.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>

1 files changed, 13 insertions, 2 deletions

diff --git a/serial.c b/serial.c
index e4dc39c..be5714f 100644
--- a/serial.c
+++ b/serial.c
@@ -203,9 +203,20 @@ static int serial_set_flow(struct ios_ops *ios, int flow)
 
 static int serial_send_break(struct ios_ops *ios)
 {
-	tcsendbreak(ios->fd, 0);
+	int ret;
+	struct timeval delay = {
+		.tv_sec = 0,
+		.tv_usec = 400000,
+	};
 
-	return 0;
+	ret = ioctl(ios->fd, TIOCSBRK, NULL);
+	if (ret < 0)
+		return ret;
+
+	select(0, NULL, NULL, NULL, &delay);
+
+	ret = ioctl(ios->fd, TIOCCBRK, NULL);
+	return ret;
 }
 
 /* restore original terminal settings on exit */