plan9fox/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 $0 regexp >[1=2]
	exit usage
}
# see /sys/src/9/port/proc.c:/^killbig
psu | awk '$NF ~ /'$1'/ {
print "@{echo noswap >/proc/"$2"/ctl}"
}' | rc >/dev/null >[2=1]
exit ''
Import sources from 2011-03-30 iso image - rc 2011-03-30 14:14:36 +00:00			`#!/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 $0 regexp >[1=2]`
			`exit usage`
			`}`
			`# see /sys/src/9/port/proc.c:/^killbig`
dontkill: ignore errors 2011-08-27 16:39:14 +00:00			`psu \| awk '$NF ~ /'$1'/ {`
dontkill: only use noswap flag to mark processes as not to be terminated on oom changing procmode has the nasty side effect that notes cannot be posted to them, prventing sysfatal() and threadexitsall() to cleanup properly. recent kernels also check the noswap flag to void killing them in out of memory condition, so this is really all we need now. 2015-06-15 15:13:19 +00:00			`print "@{echo noswap >/proc/"$2"/ctl}"`
dontkill: ignore errors 2011-08-27 16:39:14 +00:00			`}' \| rc >/dev/null >[2=1]`
dontkill: explicitely set exit status to '' 2018-05-19 21:15:22 +00:00			`exit ''`