#!/bin/sh
# A tiny wrapper to let cron run jobs (like slocate) with a respect
# to the system load. Written by <michael.shigorin@usa.net>

LOAD=0.5	# -l: the default critical load value
TIME=2		# -t: 1 for the very last minute, 2 => 5 min, 3 => 15 min
ONCE=0		# -o: once per day

while :
do
	case $1 in
		-l|--load) LOAD=$2; shift; shift; continue;;
		-t|--time) TIME=$2; shift; shift; continue;;
		-o|--once) ONCE=1;  shift;        continue;;
		-h|--help) head -l 6 "$0"; exit 0;;
		*)	   break;;
	esac
done
LOAD=$(echo "100*$LOAD"|bc)
LOAD=${LOAD%.*}
NOW=$(echo "100*`/usr/bin/cut -f$TIME -d' ' /proc/loadavg`"|bc)
NOW=${NOW%.*}
[ "$(/bin/ls -l --time=use "$1"|/usr/bin/cut -c43-48)" = \
	"$(/bin/date +"%b %d")" ] && exit 0	# $1 already used today
						# (maybe not by us :-/ )
[ $NOW -le $LOAD ] && eval $*