[SOLVED] Changing /sys/class/leds/led0/trigger to survive re

[cincuranet]

Hi *,

is there a way to change the /sys/class/leds/led0/trigger so it survives reboots?

[moonman]

Use tmpfiles https://wiki.archlinux.org/index.php/sy ... rary_files
Something like:

/usr/lib/tmpfiles.d/leds.conf
$this->bbcode_second_pass_code('', 'w /sys/class/leds/led0/trigger - - - - <trigger name>')

[cincuranet]

Thanks. I suppose the /etc/tmpfiles.d/... would be maybe better place.

Anyway the docs says:
$this->bbcode_second_pass_quote('', 'N')ote: This method may not work to set options in /sys since the systemd-tmpfiles-setup service may run before the appropriate device modules is loaded. In this case you could check whether the module has a parameter for the option you want to set with modinfo module and set this option with a config file in /etc/modprobe.d. Otherwise you will have to write a udev rule to set the appropriate attribute as soon as the device appears.

[moonman]

Yes /etc/.. is a better place.

That you would have to try. Haven't had any problems myself. If it doesn't work you will have to make a service file that calls a acript that sets leds.

[cincuranet]

I can confirm that (Raspberry Pi B). It works with the tmpfiles.d configuration. No need to create a service file. Thanks.