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中国DOS联盟论坛 » DOS批处理 & 脚本技术（批处理室） » Automatically determine whether the folder is empty. If it is an empty folder, delete it! View 4,322　Replies 16

Original Poster Posted 2008-02-22 00:47　·　中国湖北宜昌电信

eckert

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Automatically determine whether a folder is empty. If it is an empty folder, delete it!

for /l %%a in (1,1,3) do for/r %%i in (.) do rd %%~si

Let me see if there are any errors.

Can it be used in LJ file cleaning?

Floor 2 Posted 2008-02-23 00:53　·　中国福建三明电信

lotus516

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for /f "tokens=*" %%a in ('dir /b /ad /s "l:\"^|sort /r" do rd "%%a" 2>nul

Floor 3 Posted 2008-02-23 09:26　·　中国江苏扬州江都区电信

cad55

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Originally posted by lotus516 at 2008-2-23 12:53 AM:
for /f "tokens=*" %%a in ('dir /b /ad /s "l:\"^|sort /r') do rd "%%a" 2>nul

Expert...

Also, may I ask...

How to search and delete all types of files with 0 bytes.

Floor 4 Posted 2008-02-23 11:33　·　中国山东烟台联通

zyz0304360

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Indeed powerful
Learned
Salute
All types of files with 0 bytes
Use %%~z in FOR to expand the file size
%%~zi=0 means 0 bytes i

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Floor 5 Posted 2008-02-23 11:40　·　中国山东烟台联通

zyz0304360

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What does "l:\" mean in the following?
I don't understand here, can you give me some guidance?
Thank you very much

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Floor 6 Posted 2008-02-23 12:16　·　中国江苏扬州江都区电信

cad55

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Originally posted by zyz0304360 at 2008-2-23 11:40 AM:
May I ask
In the line "for /f "tokens=*" %%a in ('dir /b /ad /s "l:\"^|sort /r') do rd "%%a" 2>nul ",
what does the part "l:\" mean?
I don't understand this part here...

Dizzy
It's to delete the folders in the current drive letter.......

The 0-byte one.. you can say it again.....
I didn't understand it..........

Floor 7 Posted 2008-02-23 13:01　·　中国北京华为云

abcd

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It is to use the characteristics of the rd command. When deleting a 0-byte folder, it will not prompt an error.

Floor 8 Posted 2008-02-23 13:05　·　中国山东烟台联通

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@echo off
for /f "tokens=*" %%i in ('dir /b *.* ^|sort /r') do if %%~zi==0 del /f /q "%%~ni.*"
pause

[ Last edited by zyz0304360 on 2008-2-23 at 01:18 PM ]

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Floor 9 Posted 2008-02-23 13:26　·　中国山东烟台联通

zyz0304360

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Originally posted by cad55 at 2008-2-23 12:16 PM:

Wow
It's to delete the current drive letter of the folder.......

Which 0-byte.. you say again.....
Didn't understand..........

It's to delete the current drive letter of the folder.......

I execute
dir /b /ad /s "|:\"
and it will report an error
Cannot find the specified path ah

For example, there is such a file
C:aa\aa\aa
How to delete the drive letter?
Like this?
C:aa\aa\aa |:\

I'm a newbie, currently only understand this
set a=C:aa\aa\aa
set a=%a:\=%

The above is not understood, please give guidance, thank you

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Floor 10 Posted 2008-02-23 15:07　·　中国江苏扬州电信

duansuo

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Is there anyone who can explain it completely? I still don't quite understand. Thanks a lot!

Floor 11 Posted 2008-02-23 16:50　·　中国天津电信

abcd

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Originally posted by zyz0304360 at 2008-2-23 01:26 PM:

It is to delete the current drive letter of the folder.......

I execute
dir /b /ad /s "|:\"
and it will report an error
Cannot find the specified path.

For example, there is such a file
C：aa\aa\aa
How to delete the drive letter...

Removing "|:\" means the current drive letter.

Replace "|:\" with your own path.

Floor 12 Posted 2008-02-23 17:04　·　中国江苏扬州江都区电信

cad55

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Originally posted by duansuo at 2008-2-23 03:07 PM:
Is there anyone who can explain it completely? I still don't understand it very well.

Thanks!

For example: You want to delete empty folders under the C drive:
for /f "tokens=*" %%a in ('dir /b /ad /s "c:\"^|sort /r') do rd "%%a" 2>nul

You want to delete empty folders under the D drive:
for /f "tokens=*" %%a in ('dir /b /ad /s "d:\"^|sort /r') do rd "%%a" 2>nul

[ Last edited by cad55 on 2008-2-23 at 05:14 PM ]

Floor 13 Posted 2008-02-23 17:15　·　中国广东广州白云区电信

Nickey

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Why does changing the

for /f "tokens=*" %%a in ('dir /b /ad /s "E:\"^|sort /r') do rd "%%a" 2>nul

to:

for /f "tokens=*" %%a in ('dir /b /ad /s "E:\"^|sort /r') do echo "%%a">>空文件夹菜单.txt

result in all folders being written to the notepad?

I could be the one
http://kanlis.7ta.cn

Floor 14 Posted 2008-02-23 17:18　·　中国天津电信

abcd

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Originally posted by Nickey at 2008-2-23 05:15 PM:
Why change the
for /f "tokens=*" %%a in ('dir /b /ad /s "E:\"^|sort /r') do rd "%%a" 2>nul
to:
for /f "tokens=*" %%a in ( ... 



'dir /b /ad /s "E:\"^|sort /r'



will list all folders. As for why it only deletes empty folders and not non-empty ones



it is because of the characteristic of the rd command. When deleting an empty folder, it does not prompt



When the /Q parameter is not added, the rd command will prompt an error message when deleting a non-empty folder.

Floor 15 Posted 2008-02-23 18:06　·　中国山东烟台联通

zyz0304360

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Originally posted by Nickey at 2008-2-23 05:15 PM:
Why change the
for /f "tokens=*" %%a in ('dir /b /ad /s "E:\"^|sort /r') do rd "%%a" 2>nul
to:
for /f "tokens=*" %%a in ( ... 







'dir /b /ad /s "E:\"^|sort /r'

This command is used to list all folder names (with /ad) under and in subdirectories (/s) of drive E:

/ad specifies to print folder names

Then assign the folder name to %%a

2>nul

means to write the error commands when executing the rd "%%a" command to the null device (that is, no feedback is needed)

Changing it to echo "%%a" >>aaa.txt

Of course, it is to write the system feedback when deleting empty files to aaa.txt

Because %%a is the folder name



[ Last edited by zyz0304360 on 2008-2-23 at 06:07 PM ]

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