[arch-general] initramfs: execute own script

[Aaron Griffin]

On Fri, Jan 22, 2010 at 11:11 AM, AlannY <m at alanny.ru> wrote:
> On Fri, Jan 22, 2010 at 11:06:08AM -0500, Jim Pryor wrote:
>> The best way I found to do this was to read the source for the /lib/initcpio/{init,init_functions}
>> look at some of the pairs /lib/initcpio/{hooks,install}/foo for
>> different foo. However, you have to realize that you only have a
>> restricted set of binaries and shell commands available then.
>>
>> Also, Arch is in the process of moving to a different initcpio system.
>> It's not in any of the repos yet, but is in the pipeline. I haven't
>> fully understood what the changes will be. I think they're getting rid
>> of the use of klibc.
>>
>> I expect others who do know better will chime in.
>
> It not helps at all. "Your" hooks runs before mounting root device.
> I need to run my script after mount root, but before switch_root.
>
> At the end of /lib/initcpio/init, there are call to kinit
> and it seems kinit mount root partition and do switch_root.
>
> Is it possible to write "hook" for kinit?

As Michael said, look at what archiso or larch do. In effect, the use
a custom hook script that does the mounting and kinit step themselves,
basically abandoning the rest of the init script.

> P.S. Why does Arch uses kinit, raw is not trusted?

I have no idea what you're asking here. We use kinit because, when
this was created, it was a quick and robust way to do this that didn't
require major overhauls or any packages.