INSTALL for systemd

[Anonymous]

Edited by author [me] 2017 11 03

The included 10-kuhler.rules udev rule to run on BOOTUP does not work with systemd setups and requires syntactical and control flow changes. Specifically, RUN+=/var/local/kuhlerd looks like an older syntax so cannot be parsed well. RUN{program}=/var/local/kuhlerd is the correct syntax as of late but it will not execute as expected. My workaround, which I share to enlighten other fans:

/etc/udev/rules.d/10-kuhler.rules

SUBSYSTEM=="usb", ATTR{idVendor}=="2433", ATTR{idProduct}=="b111", SYMLINK="kuhler", TAG+="systemd"

This will create a device file on boot /dev/kuhler

adduser -M kuhler -g kuhler

chown kuhler /var/local/kuhlerd

chown kuhler /var/local/kuhler_ctl

Changing ownership may not be required since these executable belong to group kuhler per standard install. Included because this is my stable setup.

/etc/systemd/system/dev-kuhler.device

# Once /dev/kuhler symlink is added to /dev, systemd will load this and pass control unto kuhlerd.service
[Unit]
Description=Kuhler Device Unit
Requires=kuhlerd.service

/etc/systemd/system/kuhlerd.service

# This will start the daemon and guard against kuhler_ctl.service starting first
[Unit]
Descripton=Kuhler Daemon
After=kuhler.device
Before=kuhler_ctl.service
[Service]
User=kuhler
Group=kuhler
Type=forking
ExecStart=/var/local/kuhlerd
RemainAfterExit=yes

/etc/systemd/system/kuhler_ctl.service

# This will set up fan parameters.
[Unit]
Description=Kuhler Fan Control
After=kuhlerd.service
[Service]
User=kuhler
Group=kuhler
Type=simple
ExecStart=/var/local/kuhler_ctl -m1 -s34 -f38
[Install]
WantedBy=kuhlerd.service

systemctl enable kuhler_ctl

This assumes you want systemd to set parameters every boot in addition to loading the daemon.

Tested on LFS 8.1-systemd edition.

Suggestions, feedback to improve function or elegance or to educate encouraged! I think there may be some extraneous scripting here.

Disclaimer: I tinker with Linux in my spare time and by no means do I consider myself a pro. My qualifications: Brain. My inspiration: RTFM.

Edits:
Run as a user kuhler as the less directly run as root the inherently safer?
Change type to simple (oneshot may fail).
Explicity add Before=kuhler_ctl.service to kuhlerd.service to help ensure kuhler_ctl does not fail (without dependency).

Forge ahead!

[Anonymous]

deleted by author, original post updated