#!/bin/sh

help() {
    echo 'up/down [DEVICE]'
    echo 'status  [DEVICE]'
}

is_available() {
    uci show pbr | grep -q "pbr.$1=policy"
}


# EXIT_SUCCESS if enabled
# EXIT_FAILURE if disabled
status() {
    uci get pbr."$1".enabled >/dev/null 2>&1
}

up() {
    is_available "$1" || exit 1
    status "$1" || exit 1
    uci del pbr."$1".enabled >/dev/null
    uci commit >/dev/null
    /etc/init.d/pbr reload > /dev/null
}

down() {
    is_available "$1" || exit 1
    status "$1" && exit 1
    uci set pbr."$1".enabled=0 >/dev/null
    uci commit >/dev/null
    /etc/init.d/pbr reload > /dev/null
}

toggle() {
    is_available "$1" || exit 1
    if status "$1"; then
        up "$1"
    else
        down "$1"
    fi
}

if [ $# -lt 2 ]; then
    help >&2
    exit 1
fi

case "$1" in
    "up") up "$2";;
    "down") down "$2" ;;
    "toggle") toggle "$2" ;;
    "status") status "$2" && echo '0' || echo '1' ;;
esac