Re: [PATCH] Allow disabling the build of all of systemd, leaving just udev

[William Hubbs <w.d.hubbs@gmail.com>]

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On Sun, Jun 03, 2012 at 03:00:27PM -0700, Bryan Kadzban wrote:
> > One more thing though, thinking about it, is that we will need the
> > systemd-tmpfiles tool because udev is not going to support the
> > /lib/udev/devices directory any longer for creating custom devices, so
> > you might want to still build and install all of the parts of that for a
> > standalone udev build if doing so doesn't bring in more dependencies.
> 
> I'd rather not replace "cp -a /lib/udev/devices/* /dev" in a boot script
> with a binary that nothing else uses, plus its configuration (which
> doesn't use nodes in /lib/udev/devices like what has been the udev ABI
> for *years*, but instead uses a list of device descriptions), plus any
> systemd-level libraries it may or may not need in the future.

Actually other things could use it because of /tmp and /run and
creating/removing files/directories there on bootup.

> If a system is already running systemd, then systemd-tmpfiles may or may
> not be the best place to do this (the ABI change is a problem for those
> systems, unless I'm missing something in the *tmpfiles* manpages). But
> if systemd is not running, then sticking to the previous ABI explicitly
> is the right way to go I think.

Unless you don't have a previous abi. Gentoo relies on udev copying
things from /lib/udev/devices, which is gone with this version of udev,
so we need the new abi.

So, how about an extra switch --enable-tmpfiles-d that will toggle on or
off whether that is built on a standalone udev build?

William


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