linux shell 递归目录、文件夹

#!/bin/sh##########################################desc:递归#########################################today=`date  +%Y%m%d`isDir(){  local dirName=$1  if [ ! -d $dirName ]; then    return 1  else    return 0  fi}recursionDir(){    local dir=$1    if  isDir "${dir}"        then :        else            echo "error,please pass a dirctory";            exit 1    fi   echo "working in ${dir}"    local filelist=`ls -tr "${dir}"`    for filename in $filelist    do        local fullpath="${dir}"/"${filename}";        if isDir "${fullpath}";then                recursionDir "${fullpath}"        else                echo "file ${fullpath}" >> /home/Gzh/logs/$today.log        fi    done}recursionDir "$1"