[gentoo-user] Re: [SOLVED] LC_ALL etc. not set when sshing into TMux

[Bertram Scharpf]

On Thursday, 30. Jun 2016, 21:11:14 +0200, Bertram Scharpf wrote:
> [...] TMux [...], when I want
> to ssh into it I get the following message:
>
>   $ ssh -t gentoohost tmux attach
>   tmux: need UTF-8 locale (LC_CTYPE) but have ANSI_X3.4-1968
>   Connection to gentoohost.mydomain.local closed.
>
> To find out what locale is set I wrote this little C
> program:
>
>   int main(int argc, char **argv, char **env)
>   {
>       char **e;
>       for (e = env; *e != 0; e++)
>           printf( "%s\n", *e);
>       return 0;
>   }
>
> Then, after compiling,
>
>   $ ssh -t gentoohost ./showenv | grep '^LC\|^LANG'
>
> this yields the empty result indeed. Therefore I guess
> TMux's behaviour is correct and the mistake is done by some
> ssh or login or whatsoever.
>
> The top (grandparent) sshd process has LC_ALL and LANG set
> with utf8, but the childs and grandchilds environments are
> empty.

I got hit by this yet another time when I tried to find out
why TMux's "mode-keys" option doesn't get set to "vi". This
depends on the EDITOR environment variable that is left
empty as well.

The solution is to set the environment variables by
"pam_env" which is called in "/etc/pam.d/sshd".

---- /etc/pam.d/included_by_ssh---------------------------------
session         required        pam_env.so
----------------------------------------------------------------

Append the following lines to the pam_env configuration:

---- /etc/security/pam_env.conf --------------------------------
PAGER           DEFAULT=less
EDITOR          DEFAULT=vim
LANG            DEFAULT=de_DE.UTF-8
LC_COLLATE      DEFAULT=C
----------------------------------------------------------------

Bertram


-- 
Bertram Scharpf
Stuttgart, Deutschland/Germany
http://www.bertram-scharpf.de