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This one supports multiple kernels (and tweaks boot
labels aiming to simplify target kernel selection
for the CPU at hand) instead of an earlier attempt
to fill in a template.
No need for the template so just drop it.
The current state made vm images belong to root group,
no reason to not change those to the primary group of
the user building an image.
kpartx -d -s could fail in some circumstances,
make a safety cleanup call more verbose.
No need to deduce kernel version again,
just save it in a temporary file.
The main reason to change what worked is
that e2k kernel-image package has Linux bits
named as image-$kver and not vmlinuz-$kver;
the guessing logic taking all of this into
account resulted in non-aesthetic patch.
NB: there's a duplicating script within
kernel feature; it wasn't easy to avoid
this and it might differ when handling
multiple kernels, I didn't think much
about this now as vm images tend to ship
with the sole one.
Yet another age old bug: `sfdisk -l' is mimicking what
a person does by hand but the script is rather interested
in what `sfdisk -g' provides, that is, geometry.
And it's stupid enough to only grok C locale.
Looks like there's a race condition somewhere: this script
will fail to clean up after itself when considerable background
load is inflicted upon the host it's running on (e.g. LA ~16
on a 8-core, single-disk system).
Note that this commit is NOT enough to win that race
but just a step in the right direction...
The check introduced by commit d7689f30 while rewriting tar2vm
(which presumed x86) was subtly broken: it checked for *host*
binary before preparing *chroot* configuration file for it.
Wonder how many build servers run lilo over here that this BUG
has managed to evade attention for almost two years...
Thanks glebfm@ for spotting that it's = instead of +=
as it goes in all the other places; I remember no good
reason to overwrite the potentially preexisting contents.
Overview of the changes:
- ARM support: separate ext2 /boot, no LILO
- avoid race condition with devmapper
- trap ERR so that -e in shebang doesn't result in extra cleanup hassle
- configurable root filesystem type (ext4 by default)
- jumps through parted hoops
Details:
1. LILO is x86-specific while the rest of the script can be used
to prepare e.g. Marvell ArmadaXP or CuBox images; we can generally
count on uboot supporting ext2 for relatively sane platforms but
not ext4 that would be a better root filesystem performance-wise.
2. Apparently /dev/mapper/loopXpY can be still missing at the time
when kpartx returns and pop up a bit later... sit there, wait
and check for it.
3. If something went wrong with any command of the script it would bail out
due to -e in shebang; it is now better to clean up the loopback device
and its mappings in this situation either.
4. One size doesn't fit all, really.
5. The parted sizing was sloppy as in broken, now it's just half insane.
Someone's decision to stick units and auto-alignment knobs into
a single one was apparently hilarious...
http://www.gnu.org/software/parted/manual/parted.html#unit
Manual loop/dm cleanup is described in documentation just in case.
/boot size meter is suboptimal in terms of additional I/O incurred,
will be most likely rewritten to make use of advance "du -s".
