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/lib/rcscripts/addons/dm-crypt-start.sh should have a default timeout value
if something unexpected happens. If your machine is unattended it shouldn't
wait forever, but try to continue without mapping your encrypted devices.

As I use an external device as key storage formatted with vfat, I ran into case
conversion problems without having a clue, why my box is hanging now, since I
have no monitor attached to it. So I couldn't even remotely get a clue of all
these troubles.

Of course the timeout should be long, so that it only applies to unattended
boxes.

Created an attachment (id=108823) [details]
dm-crypt.patch

My proposition

I am perfectly fine with the current state. Since I would need to plug in my
USB thumb drive within your proposed 60 seconds, I would be forced to watch the
boot process.

Perhaps we couĺd make a config option out of this?

I agree totally. I'd prefer to introduce a bootparam, 
as this will allow us to also handle bug 162962 with the same param.
As this is right before mounting root, there is no easy way to configure it in
a file,
what makes me opt for the bootparam.

We could introduce
key_timeout=[secs to wait]

and use this value each time we don't detect our device.
Value of zero will mean wait forever.

Created an attachment (id=121362) [details]
dm-crypt.patch

Voila, here a first example...

Created an attachment (id=121473) [details]
dm-crypt.patch

Sorry, I just forgot to merge that length function... here it is and works fine
on my 2 boxes.

thanks for patch. Some mods and in cvs.