[klibc] [PATCH 1/3] klibc: Add scandir() and alphasort() support.

[maximilian attems]

On Mon, Aug 01, 2011 at 09:53:10AM -0700, Mike Waychison wrote:
> Looks like I forgot to add the cover sheet that I wrote up for this
> series that actually explains why I'm doing this.  Here it is:
> 
> 
> This patchset applies to klibc mainline.
> 
> This patchset introduces the ability to kinit to execute scripts or
> executable files present in in the initramfs before switching over to
> the root filesystem.
> 
> It is implemented by first implementing scandir() and alphasort() as
> present in POSIX.1-2008 in klibc itself, and then using that as the
> basis for iterating and executing files via a run_scripts() call.

I like it very much as kexec-tools and lvm2 also use those functions.
Didn't yet have time to review the code itself and thus was silent,
but it is on my TODO.
 
> This patchset introduces two different drop directories, though this is
> of course subject to change and these are only presented in an effort to
> put an example forward.  I currently only have a requirement to run
> stuff between the time we call do_mounts() and the time we call
> run_init().
> 
> These are the directories:
> 
>       /scripts/after-network: ipconfig is completed, but the root
>           filesystem isn't yet mounted.
>       /scripts/after-mount: the root filesystem has just been mounted at
>           /root.

I am a bit unsure of the naming of those directories, but that is easy
to fix once consesus is reached.
The initramfs-tools naming which aboves seems modelled after may not be
pretty and correct.
 
> I believe this would help both our use-case (where we'd like to do
> customization of the early-bootup sequence without having to hack kinit
> too much), and the use case for initramfs-tools, opening the door to
> replace all the "core" shell there kinit as a C implementation.

I do agree that this seems preferable then the reducing kinit to dust axing.

Related to it I wondered who is loading for you the linux modules or
do you have udev running for the firmware loading?

As I'm quite inclined with aboves plugin features to package kinit as seperate
initramfs utility for Debian and Ubuntu.
 
thank you very much.

-- 
maks