tree 9327e03835442560bc227ef80864b41b7ff64837
parent 8ddc171b7b302844d9f4598125fed925b72c686c
author Thomas Weißschuh <thomas@t-8ch.de> 1682492819 +0200
committer Laurent Vivier <laurent@vivier.eu> 1684300829 +0200

linux-user: report ENOTTY for unknown ioctls

The correct error number for unknown ioctls is ENOTTY.

ENOSYS would mean that the ioctl() syscall itself is not implemented,
which is very improbable and unexpected for userspace.

ENOTTY means "Inappropriate ioctl for device". This is what the kernel
returns on unknown ioctls, what qemu is trying to express and what
userspace is prepared to handle.

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230426070659.80649-1-thomas@t-8ch.de>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>