jehanne/arch/rc/cmd/dontkill

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#!/cmd/rc
# dontkill regexp - mark invoker's processes with names matching regexp
# as not killable when the kernel runs out of memory
if (! ~ $#* 1) {
echo $0 regexp >[1=2]
exit usage
}
# see /sys/src/kern/port/proc.c:/^killbig
pids=`{psu | awk '$NF ~ /'$1'/ {print $2}'}
~ $#pids 0 || chmod -w $pids^/ctl >[2]/dev/null