tools: kwboot: Fix restoring terminal
Call tcsetattr() only if the file descriptor is valid. It may be
invalidated by previous lines (if it is not a tty descriptor).
Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Stefan Roese <sr@denx.de>
Reviewed-by: Chris Packham <judge.packham@gmail.com>
Tested-by: Chris Packham <judge.packham@gmail.com>
diff --git a/tools/kwboot.c b/tools/kwboot.c
index 1ba5ded..7fa742d 100644
--- a/tools/kwboot.c
+++ b/tools/kwboot.c
@@ -558,7 +558,8 @@
}
} while (quit[s] != 0);
- tcsetattr(in, TCSANOW, &otio);
+ if (in >= 0)
+ tcsetattr(in, TCSANOW, &otio);
out:
return rc;
}