#!/bin/sh

SYSLOG_CONF=/etc/syslog-ng/patterndb.d/kernel.conf
SYSLOG_CONF_BAK=/etc/syslog-ng/patterndb.d/kernel.conf.bak

restore_config()
{
    cp $SYSLOG_CONF_BAK $SYSLOG_CONF
}

parsing_log_level()
{
    case $1 in
        7)
            log_level="debug"
            ;;
        6)
            log_level="info"
            ;;
        5)
            log_level="notice"
            ;;
        4)
            log_level="warning"
            ;;
        3)
            log_level="err"
            ;;
        2)
            log_level="crit"
            ;;
        1)
            log_level="alert"
            ;;
        0)
            log_level="emerg"
            ;;
        *)
            restore_config
            exit 0
            ;;
    esac
}

adjust_kernel_loglv()
{
    # Get line num of kernel level
    result=`egrep "and level\(.*\)" $SYSLOG_CONF -n | awk -F ':' '{print $1}'`
    # replace log level
    for line in $result
    do
	    if [ ! -z "$line" ]; then
		    sed -i -e "${line}s/level(.*\.\.emerg)/level($log_level\.\.emerg)/" $SYSLOG_CONF
	    fi
    done
}

if [ ! -f $SYSLOG_CONF_BAK ]; then
    cp $SYSLOG_CONF $SYSLOG_CONF_BAK
fi

parsing_log_level $1
adjust_kernel_loglv
synoservice --reload syslog-ng