Re: Looking for an advice on file location in Fedora

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On Wed, Mar 20, 2019 at 9:00 AM Zbigniew Jędrzejewski-Szmek
<zbyszek@xxxxxxxxx> wrote:
>
> On Wed, Mar 20, 2019 at 10:44:53AM +0100, Michal Ruprich wrote:
> > Hi,
> >
> > I am preparing FRR so that it could be added to Fedora and since there
> > are a lot of experienced packagers here, I would like to ask for an
> > advice. FRR is a fork of quagga and it provides a couple of routing
> > daemons(bgp, isis, odpf, rip, eigrp etc.). Originally in quagga, each
> > daemon had its own binary in /usr/sbin and each daemon could be started
> > via systemctl(including the zebra daemon which is needed to run other
> > routing daemons). In FRR the developers have chosen a different
> > approach. They provide a script that takes care of the start-up of all
> > requested daemons - that means that all daemons are started via a single
> > systemctl command.
> That doesn't sound like a good idea. It seems that they reimplement
> daemon management internally, which usually doesn't go well.
>

I've experienced this from a number of other projects. This is a
seriously bad idea. Have you asked the FRR developers why they feel
they can't use the service management facilities of systemd
effectively?

> > There are a couple of other scripts that are used for
> > reloading the daemons etc. I am now wondering about where to place all
> > relevant binary files and all the scripts.
> Do the daemons have names that are unique enough to not cause conflicts
> with other packages? If yes, then it should be OK to put them all in
> /usr/bin/. (There's no reason to care about "sbin" vs "bin", since nowadays
> both are included in $PATH.)
>
> > The upstream idea about the location is to put all binary files and all
> > the scripts to /usr/lib/frr/ which does not make much sense to me.
> It is actually a pretty good choice, except that you say that those
> executables are supposed to be called by the users directly. If they
> weren't, or if were only rarely, this upstream decision would be
> appropriate. In particular, there's no effective difference between
> /usr/libexec and /usr/lib/ffr, so using /usr/lib/ffr would be correct.
>

If you're going to stuff binaries in a non-PATH place,
/usr/libexec/frr (I assume FRR is the project name, and not FFR) is
where it should go, full stop.

> > My
> > first idea was to keep the main script in /usr/sbin and put the rest to
> > /usr/libexec, but that would only make sense if the binaries and scripts
> > were not meant to be run by the user, which is not the case. It is very
> > well possible to start each daemon directly without interfering with
> > systemd or any of the scripts. Same applies for each of the script.
> >
> > So the question is whether it is acceptable to keep the scripts in the
> > /usr/sbin directory together with the binaries or whether I should put
> > them somewhere else?
> >
> > I would be grateful for any ideas about this. Thanks.
>

In general, this project seems like it needs some help understanding
how services should work.




--
真実はいつも一つ!/ Always, there's only one truth!
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