doshasum.sh

#! /bin/bash 
# *-* encoding: utf-8 *-*
#
# =============================================
#
#      Author   : Andy Scout 
#    E-mail     : andyhuzhill@gmail.com
#
#  Description  : 在文件夹中递归的进入每个子目录，
#                 校验每个子目录下生成校验文件
#  Revision     :
#
# =============================================

# 全局变量记录递归层数
nest=0

# 记录脚本参数
option=$1

if [ ! "$option" ]
then
    echo "Usage : ./makeshasum [make][clean][verify]"
    exit 1
fi

function dosha512sum() {
    local files=$(ls -1)

    case $option in
    "make") 
        sha512sum * > file.sha512 ;;
    "clean") 
        rm file.sha512 ;;
    "verify") 
        sha512sum -c file.sha512 ;;
    esac

    for file in $files
    do
        if [ -d $file ]
        then
            cd $file
            nest=$[nest+1]
            dosha512sum 
        fi
    done

    if [ $nest -ne 0 ]
    then
        cd ..
        nest=$[nest-1]
        return 
    fi
}

dosha512sum 

exit 0