#!/bin/sh -e

export SGMONDIR="$(dirname "$(realpath -- "$0")")"
. "$SGMONDIR"/rc
[ -z "$1" ] && SGMONSRV="$(basename "$PWD")" || SGMONSRV="$1"
export SGMONSRV
export SGMONTMP=`mktemp -d -t sgmon`
rm -f state
ln -s $SGMONTMP state
trap "rm -fr state $SGMONTMP" HUP PIPE INT QUIT TERM EXIT

while : ; do
    [ -s max-attempts ] && read max_attempts < max-attempts || max_attempts=1
    [ -s state/attempts ] && read attempts < state/attempts || attempts=0
    [ -x run ] && cmd=./run || cmd="sh -e run"
    if $cmd >state/stdout 2>state/stderr ; then
        if [ "$attempts" -ge "$max_attempts" ] ; then
            "$SGMONDIR"/notify-ok.sh
        fi
        rm -f state/attempts
        touch state/ok
        echo OK
    else
        rm -f state/ok
        attempts=$(( $attempts + 1 ))
        echo $attempts > state/attempts
        echo BAD ${attempts}/${max_attempts}
        if [ $attempts -eq $max_attempts ] ; then
            "$SGMONDIR"/notify-bad.sh
        fi
    fi
    [ -s period ] && read period < period || period=$PERIOD_DEFAULT
    sleep $period
done