From: Linuxppc-dev Gleb Fotengauer-Malinovskiy
> Sent: 11 July 2017 01:12
> This ioctl does nothing to justify an _IOC_READ or _IOC_WRITE flag
> because it doesn't copy anything from/to userspace to access the
> argument.
>
> Fixes: 54ebbfb1 ("tty: add TIOCGPTPEER ioctl")
...
> -#define TIOCGPTPEER _IOR('T', 0x41, int) /* Safely open the slave */
> +#define TIOCGPTPEER _IO('T', 0x41) /* Safely open the slave */
This is a user API change. When was the ioctl added?
David
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