Re: Any difference between `screen -r` vs `screen -x` when attaching to an already attached session?

Thanks, Andrew.

My question is: specifically when attaching to a detached session, is there
any difference between using `screen -r` and `screen -x`?

For example, suppose I have a detached session called "foo", which I want
to attach to. Is there any reason to prefer:

screen -r foo

To:

screen -x foo

The reason I'm asking is because I'm writing a script to attach to a screen
session by name, and I was wondering if it's worth checking if the session
is attached and using screen -r in that case, because if there's no
difference, I'd just use screen -x, since it attaches to the session
whether it's detached or not.

Hope my question is clear... D.

On Mon, Jul 4, 2016 at 6:23 PM, Andrew Savchenko <[email protected]> wrote:

> Hi,
>
> On Mon, 4 Jul 2016 18:15:50 -0400 Dun Peal wrote:
> > Looking for a command that would attach to a screen session "foo", wether
> > it is detached or not. It seems like `screen -x foo` would do it - it
> > attaches to "foo" in both cases.
> >
> > But is it really the same?  Or is there any difference between `screen -x
> > foo` and `screen -r foo` when "foo" is detached?
> >
> > Specifically, is there a reason to choose one over the other when "foo"
> is
> > detached?
>
> -x option is needed for multiple display mode, when several users
> work the same screen (very useful when one needs to educate
> someone :)), so -x doesn't detach session if it is attached.
>
> -r is usually used in single user mode if session is already
> detached. It can't attach to already attached session.
>
> Best regards,
> Andrew Savchenko
>
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>

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