shell脚本示例

#!/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