Use screen -UDR

Hmm, not sure about this one ...

I just tested this, in /usr/bin/byobu-select-session, changing -xRR to -UDR.

I don't think I like the behavior.

Can you test it out a bit and tell me the advantages and disadvantages of changing it this way.

I am not sure about your use cases.

Current byobu attach to an existing session automatically. and make
it display simultaneously on all clients.

Say I have an server to manage, and I have my wks-home at home and
wks-work at work.

I connect form my wks-work to server, created the byobu session.

Then I left work, at home, I connected from wks-home. I expect to
attach to the existing screen and then disconnect others, but right
now byobu will just continue the old session and still send all my
input to wks-work. This is unnecessary and dangerous, if my wks-work
is compromised , I can't even know whether there's some one already
snooping my screen.

I don't know what your use cases are, but from an system administrator
point, it should works just like consoles, you grab it, others lose
it, they can grab it back, then you lose it.

On Tue, May 11, 2010 at 12:02 AM, Dustin Kirkland
<email address hidden> wrote:
> Hmm, not sure about this one ...
>
> I just tested this, in /usr/bin/byobu-select-session, changing -xRR to
> -UDR.
>
> I don't think I like the behavior.
>
> Can you test it out a bit and tell me the advantages and disadvantages
> of changing it this way.
>
> ** Changed in: byobu
>       Status: New => Incomplete
>
> ** Changed in: byobu
>   Importance: Undecided => Wishlist
>
> --
> Use screen -UDR
> https://bugs.launchpad.net/bugs/578373
> You received this bug notification because you are a direct subscriber
> of the bug.
>
> Status in byobu: Incomplete
>
> Bug description:
> We should use screen -UDR as the launching parameters
>
> as noted in the man of screen.
>
>  -D -R   Attach  here and now. In detail this means: If a session is running, then reattach. If necessary detach and logout remotely first.  If
>               it was not running create it and notify the user. This is the author's favorite.
>
> Or at least we should mark it as an optional thing or an flag in .byourc since it is hardcoded to screen in launcher now. Also, it is not secure to just default to "share" screens.
>
> To unsubscribe from this bug, go to:
> https://bugs.launchpad.net/byobu/+bug/578373/+subscribe
>

Well, my use case involves a bit more sharing than yours, I suppose.

I often use byobu to teach classes, with shared screen sessions, allowing others to connect remotely to it. I also use it to co-administer systems, with a colleague who's on the other side of the world.

Okay, so here's what I'll do...

I've added support to byobu-launcher to accept additional arguments and pass them through to byobu and screen.

Thus, you can edit your ~/.profile to do:
`echo $- | grep -qs i` && byobu-launcher -UDR && exit 0

And, of course, when you run byobu from the command line, you can run "byobu -UDR".

I'm hesitant to change the default from -xDD, as the screen sharing is very important to many byobu users, in as much as I can tell.

This bug was fixed in the package byobu - 2.75-0ubuntu1

---------------
byobu (2.75-0ubuntu1) maverick; urgency=low

  * usr/bin/byobu: ensure that .screenrc gets sourced if byobu is run
    with arguments, LP: #580760
  * ec2_cost, ip_address, network, rcs_cost: fix bug when calling ifconfig
    without setting lang to english, LP: #578792
  * byobu-launcher-uninstall: create the directory, in case this script is
    executed before byobu actually runs, LP: #580384
  * usr/bin/byobu-launcher: allow user to add custom screen arguments to
    byobu-launcher (useful in .profile for adding an option like -UDR),
    LP: #578373
 -- Dustin Kirkland <email address hidden> Sat, 15 May 2010 15:32:30 -0400

Actually, I'm reconsidering now...

I've decided to give -UDR a try. I'll commit that change now. I'll be interested in feedback, though, if the change is desirable to most people.

Thanks for the bug!

This bug was fixed in the package byobu - 2.76-0ubuntu1

---------------
byobu (2.76-0ubuntu1) maverick; urgency=low

  [ Dustin Kirkland ]
  * usr/bin/byobu-select-session: default to -UDR, the "author's favorite"
    according to the screen(1) manpage; slightly more secure as it logs out
    other sessions; special handling is needed if the user wants to share
    sessions, LP: #578373; also, droping the -x should fix some resize
    problems, LP: #553085

  [ Jon Bernard ]
  * ec2_cost, rcs_cost: calculate cost from the start of the
    instance, rather than the uptime
 -- Dustin Kirkland <email address hidden> Sat, 15 May 2010 16:52:04 -0400

Please document how to enable back the sharing of screen sessions.

Running byobu-launcher with the parameter "-xRR" in .profile (when Byobu launches by default at login) doesn't seem to work.

To answer my own question:

According to your user's shell, edit their .profile (or .bash_profile), add the parameters "-xRR" to the command "byobu-launcher", like this:

`echo $- | grep -qs i` && byobu-launcher -xRR && exit 0