Re: grabbing console (syscons) in kernel

on 11/12/2011 23:45 Andriy Gapon said the following:
> 
> There are a few cases when the kernel needs to interact with a user via syscons.
> This is the cases where the kernel not only spews some output but also expects
> some input.  Some examples are:
> - asking for a root filesystem specification
> - entering ddb
> - asking to press a key for reboot
> 
> In this cases the kernel implicitly grabs the console for its own use.
> I'd like to make action more explicit.
> 
> What do you think about the approach and implementation in the following patches?
> Thank you!
> 
> https://gitorious.org/~avg/freebsd/avgbsd/commit/5248b49ebf84d98a0597fa5aa4d813a38f581acc
> https://gitorious.org/~avg/freebsd/avgbsd/commit/a0849c52242378474bb2eaa41726376fbc4c5bf6
> https://gitorious.org/~avg/freebsd/avgbsd/commit/a67515cbd720b16f03ba435ed182966a8a338b15
> https://gitorious.org/~avg/freebsd/avgbsd/commit/b8864b68b4c0e26ece065a38301c305833be32eb
> https://gitorious.org/~avg/freebsd/avgbsd/commit/1017ae425d8abecd7482bd6c6deaaf9f25f5c6cd


I was advised that the above links might not be the best way to present the
patches for review, so here are them as a single diff file:
http://people.freebsd.org/~avg/cngrab.diff


> P.S. one of the benefits is that a keyboard is put into and out of the polling
> mode before getting all the required input and after that; not around each
> character as it is done now in rather twisted way.
> 


-- 
Andriy Gapon