Re: [RFC] refactoring extra-special-file; an /etc/tmpfiles/ equivalent

[Attila Lendvai]

> i want to write a string into a file at boot to disable wake-up by
> my keyboard (so that it doesn't immediately wake up my laptop after
> i suspend it). it requires doing this once per boot:
>
> echo XHC >/proc/acpi/wakeup
> 
> the standard solution on systemd distros is to use a
> /etc/tmpfiles.d/disable-usb-wake.conf file, which systemd interprets
> (see e.g. https://forums.linuxmint.com/viewtopic.php?f=42&t=312953).

FTR, the "guixy way" currently is to add a service like this:

(simple-service 'disable-keyboard-wakeup activation-service-type
  #~(begin
      (use-modules (ice-9 regex))
      (use-modules (ice-9 textual-ports))
      (when (string-match "XHC\t  S3\t\\*enabled"
                          (call-with-input-file "/proc/acpi/wakeup"
                            get-string-all))
        (display "Turning off usb wakeup\n")
        (with-output-to-file "/proc/acpi/wakeup"
          (lambda _
            (display "XHC"))))))

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• attila lendvai
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