[Bug 1644636] Re: Cannot open your terminal /dev/pts/X - please check
[Expired for screen (Ubuntu) because there has been no activity for 60 days.] ** Changed in: screen (Ubuntu) Status: Incomplete => Expired -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1644636 Title: Cannot open your terminal /dev/pts/X - please check To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/screen/+bug/1644636/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1644636] Re: Cannot open your terminal /dev/pts/X - please check
I thought I told everything. What else I have to say ? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1644636 Title: Cannot open your terminal /dev/pts/X - please check To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/screen/+bug/1644636/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1644636] Re: Cannot open your terminal /dev/pts/X - please check
I fail to see any problem here. As the reporter seems to be unwilling to engage us to help us understand what the problem is, I'm marking this bug report as Incomplete. If somebody later decides to give us a response, then please feel free to comment and then set the bug status back to New. You may find it helpful to read "How to report bugs effectively" http://www.chiark.greenend.org.uk/~sgtatham/bugs.html. ** Changed in: screen (Ubuntu) Status: Confirmed => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1644636 Title: Cannot open your terminal /dev/pts/X - please check To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/screen/+bug/1644636/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1644636] Re: Cannot open your terminal /dev/pts/X - please check
SSH indeed. This complete waste of time is why I don't care to make a report. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1644636 Title: Cannot open your terminal /dev/pts/X - please check To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/screen/+bug/1644636/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
[Bug 1644636] Re: Cannot open your terminal /dev/pts/X - please check
Hi Jouni,
thank you for your report and your help to make Ubuntu better.
I rejected the suggestion that nothing happens and instead tried to reproduce
to understand the issue better :-)
# I have used screen with and without -q, just with -q it is more
readable and needs less returns
# works as my own user
$ screen
# becoming root via sudo, then screen still works
$ sudo su -
$ screen
# from there become another user, still works
$ su otheruser -
$ screen
I have no local root login atm, so for reproduction might I ask how you get
your initial shell?
Do you have a remote login with root login allowed or is this a local root
logon?
As fallback I created a local KVM Guest, and enabled root login there:
$uvt-kvm create --memory 2048 --cpu 4 --disk 8 --password=ubuntu
zesty-test-screen release=zesty arch=amd64 label=daily
# there I then enabled root login in /etc/sshd_config
$ ssh root@kvmguest
$ su ubuntu
$ screen
Here I was then able to reproduce your case.
"Cannot open your terminal '/dev/pts/0' - please check."
And it makes sense as the current local /dev/pts/0 is owned by root.
As a workaround there you can e.g. run
$ script /dev/null
# This will create a /dev/pts/* of your user that screen can reuse, not a fix
but a workaround
I've found that some directly wrap this up as
$ /usr/bin/script -q -c "/usr/bin/screen ${*}" /dev/null
So overall, working with a main root login should never be the default for
security reasons.
If you do so you might end up with some extra hickups and IMHO that is one of
them.
You can create a case of this issue without root login, by switching around
users with su.
But the root cause always is that the current user can't access /dev/pty/* due
to being different user than the initial terminal creating one.
Since there is a workaround for it available and easily to be found on
the internet (now one more with this bug) I think it is not a high
severity.
Also I don't think screen should create a different pty for his own user on its
own.
I'd more consider this (not to allocate a new tty a feature/limitation) of su.
That said I'd rate this as wishlist issue or almost a Won't Fix - but
I'd leave it open to you or others to comment if this is more severe
than I think.
** Changed in: screen (Ubuntu)
Status: New => Confirmed
** Changed in: screen (Ubuntu)
Importance: Undecided => Wishlist
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Cannot open your terminal /dev/pts/X - please check
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