#/bin/bash
p=-10
s=2
n=3
t=300
log=/bin/null
potprocesa="$1"
potprocesa=$(echo "$potprocesa"  | cut -d" " -f1)
if [ -z "$potprocesa" ]
then
	potprocesa="$1"
fi
if [ "$#" -eq 2 ]
then
	conffile="$2"
fi
if [[ ! -z "$conffile" ]]
then
	if [ -f "$conffile" ]
	then
		while IFS= read -r vrstica
		do
			IFS=':' read -ra polje <<< "$vrstica"
			[[ "${polje[0]}" = "p" ]] && p="${polje[1]}"
			[[ "${polje[0]}" = "s" ]] && s="${polje[1]}"
			[[ "${polje[0]}" = "n" ]] && n="${polje[1]}"
			[[ "${polje[0]}" = "t" ]] && t="${polje[1]}"
			[[ "${polje[0]}" = "log" ]] && log="${polje[1]}"
		done < "$conffile"
	fi
fi
procesia=$(ps -eo pid,ni,cmd)
IFS=$'\n' read -rd '' -a procesib <<<"$procesia"
procesib=("${procesib[@]:1}")
unset 'procesib[${#procesib[@]}-1]'
re='^[+-]?[0-9]+$'
instances=0
for proces in "${procesib[@]}"
do
	processplit=($proces)
	if [[ "${processplit[1]}" =~ $re ]]
	then
		a="${processplit[1]}"
		a=$((a + s))
	fi
	if [[ "${processplit[2]}" ==  "$potprocesa" ]]
	then
		renice -n "$p" "${processplit[0]}" >> "$log"
		instances=$((instances + 1))
	else
		renice -n "$a" "${processplit[0]}" >> "$log"
	fi
done
timer=$(awk -v t=$t 'BEGIN { print t / 1000 }')
while [[ "$instances" -lt "$n" ]]
do
	sleep "$timer"
	instances=$((instances + 1))
	a=$( nice )
	k=$((p - a))
	eval nice -n "$k" "$1" & >/dev/null
done

echo "Na tem mestu, $(date +"%-d. %-m.") je Zajec Veliki pomagal procesu $potprocesa." 2>&1 | tee -a "$log"