sv t getty

sv t getty

[Alex Efros]

Hi!

As you know, bash can't be killed by TERM, it prefer HUP (or KILL). :)
So, command:
    sv t getty1
will work if user not logged in on tty1 (so it will restart "*getty"
process), and will not work if user is logged in on tty1 and running bash.

To work around this issue (and make 'sv t' logout user in this tty and
restart *getty) I make script /usr/local/bin/term-getty-service and
symlink'ed to it from /var/service/*getty*/control/t .

It's a little complex because I've to kill not only first bash executed by
getty/login, but also all nested bash's (which can be executed for example
by 'mc' or 'su').

--- /usr/local/bin/term-getty-service: ---
#!/bin/bash
bashs() { while [[ -n "$1" ]]; do pgrep -P $1 bash; bashs $(pgrep -P $1); shift; done; }
bashs="$( bashs $(<supervise/pid) )"
[[ -n "$bashs" ]] && kill -HUP $bashs
exit 1 # runsv must send TERM to getty if user don't logged in this console
---

The question is: is there exists more simple way for this task?
BTW, I suppose there a race condition in my script - if user spawn new
nested bash while this script will work between 'pgrep' and 'kill'.

-- 
			WBR, Alex.