Re: 01/02: services: Allow modprobe to use "/etc/modprobe.d".

[Brice Waegeneire <brice@waegenei.re>]

Hello,

On 2020-04-07 09:35, Ludovic Courtès wrote:
> Brice Waegeneire <brice@waegenei.re> skribis:
>> On 2020-04-05 21:15, Ludovic Courtès wrote:
>>> guix-commits@gnu.org skribis:
>>> Looking at this, I was wondering if it would be possible to not use
>>> /etc/modprobe.d and instead have a way to tell the modprobe wrapper 
>>> to
>>> pass “-C /gnu/store/…-modprobe.d”, which would contain the right 
>>> thing.
>>> 
>>> Thoughts?
>> 
>> What's the issue with using /etc/modrpobe.d?
> 
> In general, use of the global file system name space isn’t great: it’s
> ambiguous (compare to a /gnu/store reference) and doesn’t work well 
> upon
> rollback or reconfigure (things that refer to /etc end up referring to
> the “new” /etc after reconfigure, even though that might not actually
> work.)
> 
> Conversely, “-C /gnu/store/…-modprobe.d” unambiguously refers to the
> intended directory.
> 
> WDYT?

It's good with me, I'll do as suggested -using the environment variable-
when implementing “kernel-module-configuratuion-service-type”.

- Brice