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Re: SystemD & Symbolic Links

From: Hilco Wijbenga
Subject: Re: SystemD & Symbolic Links
Date: Mon, 26 Dec 2016 20:40:28 -0800

On 26 December 2016 at 19:48, Leo Famulari <address@hidden> wrote:
> On Mon, Dec 26, 2016 at 03:14:42PM -0800, Hilco Wijbenga wrote:
>> Specifically, "systemctl enable guix-daemon" fails with "Failed to
>> execute operation: Too many levels of symbolic links" (see [1]). Is
>> there a workaround for this? I suppose I could simply copy
>> guix-daemon.service into /etc/systemd/system instead of linking to it
>> but I'm not sure how many other things will fail because of this
>> symlink limitation.
> I recommend copying the service file as you suggested. It's exactly what
> I do on Debian, both before systemd 231 and after, and it works fine for
> me.

Okay, thanks. Why also for systemd >=231?

> If the ExecStart value contains a path to '/gnu/store/...', you should
> replace that path with
> '/var/guix/profiles/per-user/root/guix-profile/bin/guix-daemon'.
> Using the absolute path to /gnu/store only works properly if the service
> file is a symlink to root's profile, in which case the executable path
> would get updated as root updates their packages. My suggested
> replacement will have the same effect.
> If you do that, make sure to recreate the rest of the ExecStart value
> after the path to the guix-daemon.

Mmm, okay, I'll keep that in mind.

> PS What OS are you using? I'm wondering if it's too early to rely on
> systemd 231 being widely deployed.

This was the latest OpenSUSE (LEAP 42.2) that I'm thinking of using at
work. At home I use Gentoo but without systemd so I should not have
any issues there.

> PPS It's "Guix", without all capital letters :)

Huh, yes, I don't know why I made it all caps. :-) And systemd doesn't
have any caps either. What is this world coming too! ;-)

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