From 4e93b9a8f827d23b04e3acb41ae20825d0dcb6c7 Mon Sep 17 00:00:00 2001
From: Dirk Hohndel <dirk@hohndel.org>
Date: Thu, 4 Jan 2018 08:50:24 -0800
Subject: [PATCH] Cleanup: check return value of ioctl()

It's checked for all the other invocations...

Coverity CID 207796

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
---
 src/serial_posix.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/serial_posix.c b/src/serial_posix.c
index fecc018..356bc77 100644
--- a/src/serial_posix.c
+++ b/src/serial_posix.c
@@ -258,7 +258,11 @@ dc_serial_close (dc_iostream_t *abstract)
 
 #ifndef ENABLE_PTY
 	// Disable exclusive access mode.
-	ioctl (device->fd, TIOCNXCL, NULL);
+	if (ioctl (device->fd, TIOCNXCL, NULL)) {
+		int errcode = errno;
+		SYSERROR (abstract->context, errcode);
+		dc_status_set_error(&status, syserror (errcode));
+	}
 #endif
 
 	// Close the device.