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bug#23960: lshd: X11 forwarding request failed on channel 0
From: |
myglc2 |
Subject: |
bug#23960: lshd: X11 forwarding request failed on channel 0 |
Date: |
Tue, 12 Jul 2016 16:53:17 -0400 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
myglc2 <address@hidden> writes:
> From 'Re: guixSD - problem with X11 forwarding' in address@hidden
>
> myglc2 <address@hidden> writes:
>
>> address@hidden (Ludovic Courtès) writes:
>>
>>> myglc2 <address@hidden> skribis:
>>>
>>>> On guixSD, with no packages installed in the login user profile, I get
>>>> 'X11 forwarding request failed on channel 0'
>>>
>>> [...]
>>>
>>>> debug1: channel 0: new [client-session]
>>>> debug1: Entering interactive session.
>>>> debug1: Requesting X11 forwarding with authentication spoofing.
>>>> debug1: Sending environment.
>>>> debug1: Sending env LANG = en_US.UTF-8
>>>> X11 forwarding request failed on channel 0
>>>
>>> Right, I see that as well.
>>>
>>> lshd gives some clues in /var/log/messages:
>>>
>>> Feb 23 18:14:09 localhost lshd[430]: lshd: Updating utmp for login failed
>>> (errno = 2): No such file or directory
>>> Feb 23 18:14:09 localhost lshd[430]: lshd: xauth invocation failed: exit
>>> code: 127
>>> Feb 23 18:14:33 localhost lshd[430]: lshd: Updating utmpx for logout failed
>>> (errno = 2): No such file or directory
>>> Feb 23 18:14:33 localhost lshd[430]: lshd: write_buffer: Attempt to write
>>> data to closed buffer.
>>> Feb 23 18:14:33 localhost lshd[430]: lshd: Disconnect for reason 11:
>>> disconnected by user
>>>
>>> Indeed, server_x11.c in lsh reads:
>>>
>>> #ifndef XAUTH_PROGRAM
>>> # define XAUTH_PROGRAM "/usr/X11R6/bin/xauth"
>>> #endif
>>>
>>> I believe this is fixed by commit da35acf.
>>>
>>> To give it a try, you can run (as root):
>>>
>>> # guix pull
>>> # herd stop ssh-daemon
>>> # guix system reconfigure your-config.scm
>>
>> I tried the above. 'ssh -v ...' still produces results quoted above and
>> I see in /var/log/messages:
>>
>> Feb 29 20:43:54 localhost lshd[6959]: lshd: Failed to cd to `/tmp/.X11-unix'
>> (errno = 2): No such file or directory
>> Feb 29 20:43:54 localhost lshd[6959]: lshd: Updating utmp for login failed
>> (errno = 2): No such file or directory
>> Feb 29 20:45:35 localhost lshd[6959]: lshd: Updating utmpx for logout failed
>> (errno = 2): No such file or directory
>> Feb 29 20:45:35 localhost lshd[6959]: lshd: write_buffer: Attempt to write
>> data to closed buffer.
>> Feb 29 20:45:35 localhost lshd[6959]: lshd: Disconnect for reason 11:
>> disconnected by user
>> Feb 29 20:45:47 localhost lshd[6959]: lshd: Failed to cd to `/tmp/.X11-unix'
>> (errno = 2): No such file or directory
>> Feb 29 20:45:47 localhost lshd[6959]: lshd: Updating utmp for login failed
>> (errno = 2): No such file or directory
>>
>> I tried 'sudo mkdir /tmp/.X11-unix' which changed /var/log/messages to:
>>
>> Feb 29 20:54:04 localhost lshd[6959]: lshd: Updating utmp for login failed
>> (errno = 2): No such file or directory
>> Feb 29 20:54:09 localhost lshd[6959]: lshd: Updating utmpx for logout failed
>> (errno = 2): No such file or directory
>> Feb 29 20:54:09 localhost lshd[6959]: lshd: write_buffer: Attempt to write
>> data to closed buffer.
>> Feb 29 20:54:09 localhost lshd[6959]: lshd: Disconnect for reason 11:
>> disconnected by user
>>
>> and 'ssh -v ...' still produces the results quoted above.
>
> Don't think this is fixed yet. ssh in to GuixSD gives ...
>
> 'X11 forwarding request failed on channel 0'
>
> ... and on GuixSD in /var/log/messages I see ...
>
> Jul 12 16:25:42 localhost lshd[384]: lshd: Failed to cd to `/tmp/.X11-unix'
> (errno = 2): No such file or directory
> Jul 12 16:25:42 localhost lshd[384]: lshd: Updating utmp for login failed
> (errno = 2): No such file or directory
>
> ... or after ...
>
> sudo mkdir /tmp/.X11-unix
>
> ... I see ...
>
> Jul 12 16:21:53 localhost lshd[384]: lshd: Updating utmpx for logout failed
> (errno = 2): No such file or directory
> Jul 12 16:21:53 localhost lshd[384]: lshd: write_buffer: Attempt to write
> data to closed buffer.
> Jul 12 16:21:53 localhost lshd[384]: lshd: Disconnect for reason 11:
> disconnected by user
> Jul 12 16:22:00 localhost lshd[384]: lshd: Updating utmp for login failed
> (errno = 2): No such file or directory
>
> I am running from a git checkout ...
>
> address@hidden ~/src/guix$ git branch -av | grep '* master'
> * master 0885881 gnu: obs: Remove compiler
> flags for non-Intel hardware.
> address@hidden ~/src/guix$ stat /home/g1/.config/guix/latest | grep File:
> File: ‘/home/g1/.config/guix/latest’ -> ‘../../src/guix’
>
>
> system and user configs attached. TIA - George
Afterthought... when I do ...
sudo mkdir /tmp/.X11-unix
sudo chmod 777 /tmp/.X11-unix
... it works.