source: npl/commonservers/daemontools/svcdownchk

#!/bin/bash
# Stop a service and wait until it's really down
SERVICE=$1
TIMEOUT=$2

if ! [ -e "$SERVICE/run" ]; then
    exit 0
fi

if [ "$TIMEOUT" == "" ]; then
    TIMEOUT=90
fi

svc -d $SERVICE
sleep .1
while ! svstat $SERVICE | grep ': down' >/dev/null; do
    svc -d $SERVICE
    if [ "$TIMEOUT" == "0" ]; then
        exit 1
    fi
    ((TIMEOUT--))
    #with 30 seconds left, we send an interupt.
    #This is a forcefull shutdown without waiting for clients for most services
    if [ "$TIMEOUT" == 30 ]; then
        echo -n "sending interrupt "
        svc -i $SERVICE
    fi
    #with 10 seconds lefts, we just kill it
    if [ "$TIMEOUT" == 10 ]; then
        echo -n "KILLING "
        svc -k $SERVICE
    fi
    sleep 1
    echo -n "."
done
exit 0