undefined reference to `ioctl_tty'

[valdis.kletnieks at vt.edu]

On Wed, 06 Mar 2019 03:50:10 -0500, Jeffrey Walton said:

> Yeah, the race seems to be the downside to ioctl and TIOEXCL.
>
> It is too bad Linux does not honor O_EXCL for the device, or provide a
> similar open flag like SOCK_NONBLOCK was added to avoid the race in
> sockets. It would avoid a lot of problems.

-ENOPATCH :)