Re: screen-4.6.0 regression: within su: Cannot open your terminal '/dev/pts/14' - please check

[Axel Beckert]

Hi,

On Thu, Jun 29, 2017 at 02:31:39PM +0300, Andrew Savchenko wrote:
> I often use screen within su - username sessions, so that active
> terminal (e.g. xterm) is owned by a user different from one using
> su, e.g.:
> 
> su - test
> screen
> 
> This worked fine before 4.6.0 (up to 4.5.1),

That puzzles me as that never worked for me and for many other users
either, see e.g. all these bug reports in Debian:
https://bugs.debian.org/133807 https://bugs.debian.org/257676
https://bugs.debian.org/583644 https://bugs.debian.org/610201
https://bugs.debian.org/610839 https://bugs.debian.org/637925
(all merged into one report as they are about the same issue)

And there is this GNU Screen bug report on Savannah:
https://savannah.gnu.org/bugs/?25214

> with 4.6.0 I have:
> 
> $ su - test
> $ screen
> Cannot open your terminal '/dev/pts/14' - please check.

I know that behaviour of screen for ages and even saw people
recommending tmux because it doesn't seem to have this issue.

> /dev/pts/14 is indeed not owned by user test, but this way screen
> have worked fine for as long as I can remember, so this access
> should not be mandatory.
> 
> Any way to return the old behaviour?

I'd rather be interested in how you got that working all these years.
:-)

                Kind regards, Axel
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