ref: 4a8358bb5709b62a31ca88ba70820b1c22928e6f
dir: /rc/bin/dontkill/
#!/bin/rc
# dontkill regexp - mark invoker's processes with names matching regexp
# as not killable when the kernel runs out of memory
if (! ~ $#* 1) {
echo $0 regexp >[1=2]
exit usage
}
# see /sys/src/9/port/proc.c:/^killbig
pids=`{psu | awk '$NF ~ /'$1'/ {print $2}'}
~ $#pids 0 || for(p in /proc/^$pids^/ctl){chmod +w $p; echo noswap >$p; chmod -w $p}