error_report.sh

#!/bin/bash

LOG_FILE=/var/log/xiaoyu/error.log
ERROR_KEYWORD="Error"
EMAIL="sdspeedonion@gmail.com"
SUBJECT="Error Report from loveoncampus.cn"
PREFIX="<h2>Error detected on server loveoncampus!</h2><br/>Error log:<br/><div style='background-color:#f1f1f1;padding:10px;'>"
FOLLOW="</div>"

LAST_LOG_TIME=$(stat -c %Y $LOG_FILE)

while true; do
        NEW_LOG_TIME=$(stat -c %Y $LOG_FILE)
        if [[ $NEW_LOG_TIME != $LAST_LOG_TIME  ]] ; then
                LOG_TAIL=$(tail $LOG_FILE -n 100)
                echo "Error detected:"
                echo $LOG_TAIL
                echo "Sending notification mail."
                echo ${PREFIX}${LOG_TAIL}${FOLLOW} | mailx -s "$(echo -e "${SUBJECT}\nContent-Type: text/html")" ${EMAIL}
        fi
        LAST_LOG_TIME=$NEW_LOG_TIME
        sleep 2
done