trap "exit 1" 2 doesn not work on /bin/ash

Joe Lau Jlau at extremenetworks.com
Thu Jun 18 20:36:25 UTC 2009


For the following script,

------------------------------------------
#!/bin/ash

trap "exit 1" 2
PARPID=$$
(sleep $1;[ -e /proc/$PARPID ] && kill -2 $PARPID)&

if [ -n "$2" ]
then
    echo "$2"
else
    echo "************************************************************" >/dev/console
    echo "Press ENTER within $1 second(s) to interrupt the boot process" >/dev/console
    echo "************************************************************" >/dev/console
fi
read answer </dev/console
exit 0
---------------------------------------ls

I found that the trap "exit1" 2 does not work - it did not trap SIGINT.
If I changed it to trap "exit" 3 then it works.

That is it can trap SIGQUIT but not SIGINT.

Is this a known problem on Busybox 1.13.4?
Thanks.

-Joe



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