SystemD

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updated: 2023-04-24

Configuration

We need to tell SystemD how we want to launch WebCC daemon (I use vim):

    vim /lib/systemd/system/webcc-profanity.service     

Edit the content of the file like so:

    [Unit]
    Description=Web Console Chat - Profanity
    Documentation=man:ttyd(1)
    After=network.target systemd-tmpfiles-clean.service

    [Service]
    Type=simple
    EnvironmentFile=/etc/webcc/profanity.conf
    ExecStart=/usr/local/bin/ttyd $TTYD_OPTIONS
    ExecReload=/usr/bin/kill -HUP $MAINPID
    User=webcc
    Group=webcc
    UMask=0027
    WorkingDirectory=~
    Restart=on-abnormal
    KillMode=process
    StandardOutput=append:/var/log/webcc/webcc-profanity.log     
    StandardError=append:/var/log/webcc/webcc-profanity.log

    [Install]
    WantedBy=multi-user.target

With the above, our daemon will:

• read the configuration in /etc/webcc/profanity.conf
• write log to /var/log/webcc/webcc-profanity.log
• run as the webcc UNIX user.
• see only $HOME of webcc throughout the process. Which is /var/xmpp/webcc/.

You should read the manual of SystemD for further details.

Also, you can use logrotate to manage logging if necessary.

Next, we need to get SystemD to load our new configuration file:

    systemctl daemon-reload     

Then we can start the service and make sure it runs every time we (re)boot:

    systemctl enable --now webcc-profanity.service     

Customization

When you make changes to /etc/webcc/example.conf or have new version of ttyd, you need to restart the daemon to update your service:

    systemctl restart webcc-profanity.service     

To run more WebCC services, repeat the process mention above.

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