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bug#24049: GuixSD - problem with X11 forwarding
From: |
Ludovic Courtès |
Subject: |
bug#24049: GuixSD - problem with X11 forwarding |
Date: |
Mon, 01 Aug 2016 12:17:35 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) |
Hi myglc2,
myglc2 <address@hidden> skribis:
> On the client, ssh produces ...
>
> 'X11 forwarding request failed on channel 0'
>
> On the headless server (g1) in /var/log/messages ...
>
> Jul 21 12:24:51 localhost lshd[381]: lshd: Failed to cd to `/tmp/.X11-unix'
> (errno = 2): No such file or directory
> Jul 21 12:24:51 localhost lshd[381]: lshd: Updating utmp for login failed
> (errno = 2): No such file or directory
>
> With this workaround ...
>
> sudo mkdir /tmp/.X11-unix
> sudo chmod 777 /tmp/.X11-unix
>
> ... if I log out and back in X11 forwarding "works"
I believe this is a bug in lshd fixed by something along the lines of
the attached patch.
Niels, what do you think?
(Strangely I can’t find equivalent code in OpenSSH.)
Thanks,
Ludo’.
--- /tmp/lsh-2.1/src/server_x11.c 2016-08-01 11:58:54.714647794 +0200
+++ /tmp/lsh-2.1/src/server_x11.c.new 2016-08-01 11:58:46.606563478 +0200
@@ -151,7 +151,7 @@ DEFINE_COMMAND(open_forwarded_x11)
#define X11_MIN_DISPLAY 10
#define X11_MAX_DISPLAY 1000
-/* FIXME: Create the /tmp/.X11-unix directory, if needed. Figure out
+/* FIXME: Figure out
* if and how we should use /tmp/.X17-lock. Consider using display
* "unix:17" instead of just ":17".
*/
@@ -253,6 +253,7 @@ open_x11_socket(struct ssh_channel *chan
old_umask = umask(0077);
+ mkdir(X11_SOCKET_DIR, S_IRWXU | S_IRWXG | S_IRWXO | S_ISVTX);
old_cd = lsh_pushd(X11_SOCKET_DIR, &dir, 0, 0);
if (old_cd < 0)
{
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