Log in from the console, serial terminal (I haven't tried modem) or from the
network.
$ cat big-file
immediately press Ctrl-S
and now you can't shutdown system until you press Ctrl-Q
After Alt-Ctl-Del you can continue your work.
ps shows:
PID TTY STAT TIME COMMAND
176 ? D 0:00 /sbin/shutdown -t3 -rf now
I'm not sure if it proper behavior.....
Bye,
Jacek
PS. Same in 1.2.13, 2.0.0, 2.0.3