Re: [linux-pm] Dangers of touching disk between suspend and resume

[Nigel Cunningham <ncunningham@linuxmail.org>]

Hi.

On Fri, 2006-12-01 at 08:39 +0100, Stefan Seyfried wrote:
> So if somebody submits a patch that implements a "reset_signature" program,
> i'll include that in the suspend package.

I don't know if you care (you might not want to support Suspend2), but
for Suspend2 enabled kernels, you can just do:

[ -f /sys/power/suspend2/image_exists ] && echo 0 > /sys/power/suspend2/image_exists

You can cat the file to find out if an image exists, if you prefer (eg
from an initrd/ramfs). Return values are:

-1: resume= doesn't point to a recognised signature
0: No image, normal signature
1: Image exists.

Regards,

Nigel


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