#!/bin/sh

. /etc/sqm/sqm.conf
ACTION="$1"
RUN_IFACE="$2"

if [ "$(id -u)" -ne "0" ]; then
    echo "This script must be run as root." >&2
    exit 1
fi

if [ "$ACTION" != "start" -a "$ACTION" != "stop" -a "$ACTION" != "reload" ]; then
    echo "Usage: $0 <start|stop|reload> [iface]." >&2
    exit 1
fi

# Stopping all active interfaces
if [ "$ACTION" = "stop" -a -z "$RUN_IFACE" ]; then
    echo "Stopping SQM on all active interfaces." >&2
    for f in ${SQM_STATE_DIR}/*.state; do
        # Source the state file prior to stopping; we need the $IFACE and
        # $SCRIPT variables saved in there.
        [ -f "$f" ] && ( . $f; IFACE=$IFACE SCRIPT=$SCRIPT SQM_DEBUG=$SQM_DEBUG SQM_DEBUG_LOG=$SQM_DEBUG_LOG OUTPUT_TARGET=$OUTPUT_TARGET ${SQM_LIB_DIR}/stop-sqm )
    done
    exit 0
fi

if [ -n "$RUN_IFACE" ]; then
    if [ ! -f /etc/sqm/${RUN_IFACE}.iface.conf ]; then
        echo "No config file found for iface $RUN_IFACE." >&2
        exit 1
    fi
    IFACE=$RUN_IFACE
    . /etc/sqm/${RUN_IFACE}.iface.conf
    [ -f ${SQM_STATE_DIR}/$IFACE.state ] && ( . ${SQM_LIB_DIR}/stop-sqm )
    [ "$ACTION" = "stop" ] || ( . ${SQM_LIB_DIR}/start-sqm )
else
    echo "Starting SQM on all configured interfaces." >&2
    for f in /etc/sqm/*.iface.conf; do
        if [ -f "$f" ]; then
            IFACE=$(basename $f .iface.conf)
            . $f
            [ -f ${SQM_STATE_DIR}/$IFACE.state ] && ( . ${SQM_LIB_DIR}/stop-sqm )
            [ "$ACTION" = "stop" ] || ( . ${SQM_LIB_DIR}/start-sqm )
        else
            echo >&2
            echo "Error: No valid interface configuration found." >&2
            echo "A interface must be defined in /etc/sqm/<interface name>.iface.conf" >&2
            echo "Please define a interface configuration in /etc/sqm." >&2
            echo "For more information, see the template file in" >&2
            echo "/etc/sqm/eth0.iface.conf.example" >&2
            exit 1
        fi
    done
fi