判断指定目录是否有文件
linux 中如何判断指定目录下是否有文件(包括隐藏文件和符号链接)呢?
脚本名:decide_blank_folder.sh
脚本内容:
#!/bin/sh# whether the specified folder has files,including symbolic file and hidden fileis_blank_dir_yes=2is_blank_dir_no=5isHasFileInDir(){ result3=`find "$1" ! -type d` if [ x"$result3" == x"" ];then return 1 # has no file else echo "$this_dir" return 3 # has file(s) fi}is_blank_folder_compl(){ local fold_name="$1" ls "$fold_name" >/dev/null 2>&1 if [ $? -ne 0 ];then return 4 # has no this folder fi local result=`ls -A "$fold_name"` if [ x"$result" == x"" ];then return $is_blank_dir_yes # is blank else for i in `find "$fold_name" ! -type d`;do return $is_blank_dir_no done #init_bool=5 return $is_blank_dir_yes fi}if [ -z "$1" ];then echo "no argument"; exit 255fiis_blank_folder_compl "$1"retval=$?echo "return value: $retval"if [ $retval -eq $is_blank_dir_yes ];then echo "has no file(s)"else if [ $retval -eq $is_blank_dir_no ];then echo "has file......." fifi
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测试如下:
[root@localhost test]# ./decide_blank_folder.sh abc/
return value: 2
has no file(s)
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知识点补充:
(1)如何查看隐藏文件?
使用ls -A
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(2)`find "$fold_name" ! -type d` 中的感叹号表示什么?
表示否定,即搜索除文件夹之外的所有内容,搜索时排出文件夹。
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