Usplash and password request (encrypted root/swap)

[Matthew Garrett]

On Sat, Dec 31, 2005 at 09:55:19AM +0200, Ilkka Tuohela wrote:

> - Write a small program to ask for the passphrase in usplash-compatible 
>   framebuffer dialog

Really, it wants to be integrated into usplash - having two applications 
trying to update the framebuffer simultaneously sounds like trouble...

> So, my questions are (lazy, could look at usplash/bogl sources...):
> - Does usplash/bogl already support this? There is a note about it, but 
>   I did not find any notice that it were implemented

Text input support /should/ be supported by bogl, but you'll need to 
grub through the source to find out how (there's no documentation).

> - If support exists, could you point me to some documents how to do this
>   properly? Guess I'll have to write my own little framebuffer app to do
>   it? Or should we have some type of generic 'ask question' usplash 
>   command, which can just be called from scripts without no compiled 
>   code? Like, 

Yeah, easiest way would be to do something like:

usplash_write PASSWORD "Enter passphrase for $rootfs:"
passphrase=`usplash_read`

and have usplash_read open the fifo for reading in blocking mode. Then 
you just ("just") need to add a password dialog to usplash, and when the 
user hits enter send the text down the fifo.

-- 
Matthew Garrett | mjg59 at srcf.ucam.org