Bug#707040: initramfs-tools: missing busybox package creates unbootable initramfs missing /bin/sh

[maximilian attems <max@stro.at>]

tags 707040 pending
stop

On Wed, 08 May 2013, Ben Love wrote:

> Two potential solutions:
> 
> 1) Change the -x test to a -e test.  I don't know if sh.shared would
> ever legitimately exist, yet should not be used as /bin/sh.

ack, done.
 
> 2) Create a final, unconditional block that does "something" sane
> to provide a fallback /bin/sh.  (Or else bail entirely!)

Added copy_exec of system /bin/sh to mkinitramfs so if none of the
hooks provided a proper shell the system default is taken.

Both patches are initramfs-tools git and will land soon in unstable
plus than in Jessie. Once there i'll nominate them at the release
team for 7.0 update fix.
 
> I think the right answer is probably to do some kind combination:
> The sh.shared text should be changed to -e, to fix the noexec mount
> problem.  And then there should be a final, unconditional block that
> halts the entire initramfs image creation.  An image without /bin/sh
> will never work!

Thank you very much for your good analysis and sorry for the late
response.

-- 
maks