Re: How to create a service for contents of arbitrary file

[Julien Lepiller]

I think this is because you cannot replace a file a /sys like guix tries to. 
Instead, it seems you can set a linux kernel argument on the command line run 
by grub at startup. According to the internet, that would be 
"vt.global_cursor_default=0"

You can set it up in your config by adding a kernel-arguments field to you 
operating-system declaration, like this:

(operating-system
  (kernel-arguments (cons "vt.global_cursor_default=0" 
%default-kernel-argumentt)))

Hope that helps!

Le 8 avril 2021 19:46:08 GMT-04:00, Bone Baboon <bone.baboon@disroot.org> a 
écrit :
>
>Julien Lepiller writes:
>
>> There's special-files-service-type described here:
>http://guix.gnu.org/manual/devel/en/html_node/Base-Services.html#Base-Services
>>
>> However, I'm not sure it will work in /sys. I guess you'll have to
>try and report back :)
>
>Thank you for this suggestion.
>
>I added this to services in my system configuration:
>
>```
>(service special-files-service-type
>  `(("/sys/class/graphics/fbcon/cursor_blink"
>     "/home/user/no-blink"))
>```
>
>The contents of `home/user/no-blink` is "0".
>
>When I run a system reconfiguration I get this error "guix system:
>error: symlink: Operation not permitted:
>"sys/class/graphics/fbcon/cursor_blink.new".
>
>Any ideas on how to overcome this error?
>
>The contents of `/sys/class/graphics/fbcon/cursor_blink` is reset to
>"1"
>every time the computer is turned on and the cursor is blinking.  I
>would like to get a service working that sets it to "0" so that I do
>not
>need to manually change this setting every time I boot the computer.