linux-kernel - Re: [PATCH 2.6.24] chroot= as a new kernel parameter

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Message-ID: <20080306212028.GB1747@elf.ucw.cz>
Date:	Thu, 6 Mar 2008 22:20:28 +0100
From:	Pavel Machek <pavel@....cz>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Pawel Plociennik <paplociennik@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.24] chroot= as a new kernel parameter

On Thu 2008-03-06 07:17:42, H. Peter Anvin wrote:
> Ingo Molnar wrote:
>> * H. Peter Anvin <hpa@...or.com> wrote:
>>
>>> Pawel Plociennik wrote:
>>>> Hi Andrew and other *real* hackers,
>>>>
>>>> I have sent a *last* version of a patch which it has added a new kernel parameter chroot=
>>>> It were discusioned a *long time* on a lkml so I hope that it will has been applied.
>>> It has been discussed and *rejected* a large number of times.
>>>
>>> This is completely useless bloat.
>>
>> why is it useless? Would it be more acceptable were it made dependent on a 
>> .config option?
>>
>
> It's useless because it's exactly and trivially replaceable with:
>
> 	init=/path/to/any/sbin/chroot /newroot /sbin/init

No, that will not work, if you don't have libraries at /. This should
be exact replacement:

init=/working_distro/lib/ld-linux.so.2 --library-path /working_distro/lib /working_distro/usr/sbin/chroot /working_distro/ /sbin/init

...assuming your chroot uses ld-linux.so.2. I believe above is ugly
enough to warrant merge of chroot= option.

...heck, how many tries would it take to get that right? Is chroot
/usr/sbin or /sbin?

This really should be in kernel, I should not have to partition my
disk to get booting to few different distros.
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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