[PATCH u-boot-mvebu 12/31] tools: kwboot: Fix restoring terminal

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 --- tools/kwboot.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/kwboot.c b/tools/kwboot.c index 2edeb5a371..7e8bf21d37 100644 --- a/tools/kwboot.c +++ b/tools/kwboot.c @@ -564,7 +564,8 @@ kwboot_terminal(int tty) } } while (quit[s] != 0);

- tcsetattr(in, TCSANOW, &otio); + if (in >= 0) + tcsetattr(in, TCSANOW, &otio); out: return rc; }