[PATCH] linux ttyname and ttyname_r: return link if appropriate

[Dmitry V. Levin]

On Wed, Aug 10, 2016 at 06:03:51PM -0500, Serge E. Hallyn wrote:
[...]
> But, even if we decide that part is dangerous, the part where we do not
> return /dev/pts/N when /proc/self/fd/M is from a different devpts mount
> than the /dev/pts/N in caller's namespace is I think very important, and
> should at least be separately applied.

I agree.
In that case, what should ttyname/ttyname_r set errno to? ENOTTY?


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