#!/bin/bash
#######################################################
# Name:         shell_exp.sh
# Version:      v21.0
# Function:     Backup MySQL Databases Template Script
# Author:       zz
# Create Date:  2016-12-03
# Description:  study
#######################################################
# Shell Env
SHELL_NAME="shell_template.sh"
SHELL_DIR="/tmp/shell"
SHELL_LOG="${SHELL_DIR}/${SHELL_NAME}.log"
LOCK_FILE="/tmp/${SHELL_NAME}.lock"
#Write Log
shell_log(){
    LOG_INFO=$1
    echo "$(date "+%Y-%m-%d") $(date "+%H-%M-%S") : ${SHELL_NAME} : ${LOG_INFO}" >> ${SHELL_LOG}
}
# Shell Usage
shell_usage(){
    echo $"Usage: $0 {backup}"
}
shell_lock(){
    touch ${LOCK_FILE}
}
shell_unlock(){
    rm -f ${LOCK_FILE}
}
# Backup MySQL All Database with mysqldump or innobackupex
mysql_backup(){
    if [ -f "$LOCK_FILE" ];then
        shell_log "${SHELL_NAME} is running"
        echo "${SHELL_NAME}" is running && exit
    fi
    shell_log "mysql backup start"
    shell_lock
    sleep 15
    shell_log "mysql backup stop"
    shell_unlock
}
# Main Function
main(){
    case $1 in
        backup)
            mysql_backup
            ;;
        *)
            shell_usage;
    esac
}
#Exec
main $1