Re: Updating squashfs filesystem

[Cyril Jaquier <cyril.jaquier@jaqpot.net>]

Daniel Baumann wrote:
> Cyril Jaquier wrote:
> > Hi all,
>
> Hi,
>
> > interface. Is it possible to replace a squashfs file at runtime?
>
> I personally didn't try it yet on the fly yet, so no idea if it really
> works or not.
>
> > 1/ remount /live/image as rw
> > 2/ copy the new squashfs image over /live/image/live/filesystem.squashfs
> > 3/ copy the new kernel and initrd
> > 4/ remount /live/image as ro
> > 5/ reboot
>
> given that all other approaches suck that come to mind right now
> (storing new filesystem on different name on the cf card, and moving it
> at boot time - possibly needs a lot of free space; or booting in
> 'firmware update modus' prior actual update aka toram, where the cf card
> wouldn't be used at all anymore and where one could directly
> rsync/copy/unpack the new filesystem over the old one - possibly needs a
> lot of free ram), i would if i were you just try it out and report back
> if it works or not :P

Thanks for your reply. The "toram" option seems to be a possible 
solution. The Alix board has 256MB of RAM so it should be possible to 
boot with this parameter and then replace the required files. I guess it 
is possible to change the parameters for the next boot if I write them 
to /live/image/syslinux/menu.cfg (on the vfat partition of course). Or 
doesn't syslinux read this file at bootup? I will try it but it is not 
on top of my todo list at the moment.

Cheers from Switzerland ;)

Cyril