[ale] Requiring SAK before logon

[Stephen Touset]

I've been tinkering around with the idea of requiring the Alt+SysRq+K 
keypress before logon on a few Linux boxen I administer. I'm, for the 
most part, the only user of the system, but I figure it's probably a 
decent habit to be in anyways. I've got the /etc/issue reminding me (and 
other users) to do this, but I'm wondering if it'd be possible to 
require it. It wouldn't be too hard to code something that simply locks 
the screen upon logout (rather than firing up login on the tty), but how 
Linux handles the process, I don't know if it will be possible for the 
SAK to bring up the normal logon afterwards. AFAIK, the SAK launches the 
same program init uses in /etc/inittab for putting the login shell up on 
the tty. Is there a way to cause init to launch a "dummy" login shell, 
but the SAK to launch the real one?

Stephen Touset

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