From: Pali Rohár pali@kernel.org
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 --- tools/kwboot.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/kwboot.c b/tools/kwboot.c index 1ba5ded5d3..7fa742d84c 100644 --- a/tools/kwboot.c +++ b/tools/kwboot.c @@ -558,7 +558,8 @@ kwboot_terminal(int tty) } } while (quit[s] != 0);
- tcsetattr(in, TCSANOW, &otio); + if (in >= 0) + tcsetattr(in, TCSANOW, &otio); out: return rc; }