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

[Clark Wang]

On Thu, Jun 29, 2017 at 7:52 PM, Axel Beckert <address@hidden> wrote:

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.
:-)

Just tried v4.5. /usr/bin/screen (rwxr-sr-x) does not work with su but /usr/local/bin/screen (rwsr-xr-x) I built from source works fine:

# ls -Ll /usr/bin/screen /usr/local/bin/screen
-rwxr-sr-x 1 root utmp   457608 2017-05-23 07:57 /usr/bin/screen
-rwsr-xr-x 1 root staff 1441416 2017-01-19 13:59 /usr/local/bin/screen
# /usr/bin/screen --version
Screen version 4.05.00 (GNU) 10-Dec-16
# /usr/local/bin/screen --version
Screen version 4.05.00 (GNU) 10-Dec-16
# su - clarkw -c '/usr/bin/screen echo hello'
Cannot open your terminal '/dev/pts/3' - please check.
# su - clarkw -c '/usr/local/bin/screen echo hello'
hello
[screen is terminating]
#

Just compiled v4.6 (rwsr-xr-x) but it did not work either:

# ls -Ll /usr/local/screen-4.6.0/bin/screen
-rwsr-xr-x 1 root staff 1558704 2017-06-30 14:32 /usr/local/screen-4.6.0/bin/screen
# su - clarkw -c '/usr/local/screen-4.6.0/bin/screen echo hello'
Cannot open your terminal '/dev/pts/3' - please check.
#

-clark