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nixpkgs/nixos/modules/services/misc/weechat.xml
Maximilian Bosch 018573b757
nixos/weechat: add setuid wrapper for `screen' to ensure true multiuser capabilities
Previously you either had to set the setuid bit yourself or workaround
`isSystemUser = true` (for a loginable shell) to access the weechat
screen.

`programs.screen` shouldn't do this by default to avoid taking too much
assumptions about the setup, however `services.weechat` explicitly
requires tihs.

See #45728
2018-10-10 11:11:34 +02:00

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<chapter xmlns="http://docbook.org/ns/docbook"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xi="http://www.w3.org/2001/XInclude"
version="5.0"
xml:id="module-services-weechat">
<title>WeeChat</title>
<para>
<link xlink:href="https://weechat.org/">WeeChat</link> is a fast and
extensible IRC client.
</para>
<section>
<title>Basic Usage</title>
<para>
By default, the module creates a
<literal><link xlink:href="https://www.freedesktop.org/wiki/Software/systemd/">systemd</link></literal>
unit which runs the chat client in a detached
<literal><link xlink:href="https://www.gnu.org/software/screen/">screen</link></literal>
session.
</para>
<para>
This can be done by enabling the <literal>weechat</literal> service:
<programlisting>
{ ... }:
{
<link linkend="opt-services.weechat.enable">services.weechat.enable</link> = true;
}
</programlisting>
</para>
<para>
The service is managed by a dedicated user named <literal>weechat</literal>
in the state directory <literal>/var/lib/weechat</literal>.
</para>
</section>
<section>
<title>Re-attaching to WeeChat</title>
<para>
WeeChat runs in a screen session owned by a dedicated user. To explicitly
allow your another user to attach to this session, the
<literal>screenrc</literal> needs to be tweaked by adding
<link xlink:href="https://www.gnu.org/software/screen/manual/html_node/Multiuser.html#Multiuser">multiuser</link>
support:
<programlisting>
{
<link linkend="opt-programs.screen.screenrc">programs.screen.screenrc</link> = ''
multiuser on
acladd normal_user
'';
}
</programlisting>
Now, the session can be re-attached like this:
<programlisting>
screen -x weechat/weechat-screen
</programlisting>
</para>
<para>
<emphasis>The session name can be changed using
<link linkend="opt-services.weechat.sessionName">services.weechat.sessionName.</link></emphasis>
</para>
</section>
</chapter>