China DOS Union

Re Will Sort:

Hehe, the reason I only used for /f is that, to be honest, I never really understood many of the usages of the for command. At least, I never quite understood what for /r meant. But just now I tried it myself, and finally understood it a little, so that command of mine can be changed to:
for /r %dst% %%f in (*.*) do if %%~tf LSS %1 del /f /q %%f && echo delete %%f

Hehe, the reason is just that simple. I'm not as persistent in pursuing technology as brother Wil is. My goal is just to get the job done. Honestly, I sincerely admire brother Wil's batch-writing skills, but I feel I'll never reach that level, and I think brother Wil's batch skills are more than enough, but they really aren't easy for people to understand. As for the batch file in the post above yours, I didn't really understand it until I was replying to this post.

A few days ago I wrote two small programs for under DOS, which just happen to be able to accomplish this task.

The batch file content is like this:
******************************************************
@echo off

rem ============================================
rem The purpose of this batch file is to delete all files in d:\datafile
rem whose last modification time was earlier than 7 days ago (not including 7 days)
rem (including files in all subdirectories)
rem ============================================



rem ============================================
rem Get the date from 7 days ago
rem If today is August 25, then the date 7 days ago is August 18
rem ============================================
GetInfo.COM /d:-7
set theDay=%year%-%mon%-%day%



rem ============================================
rem This searches in D:\datafile中搜索8天前(含8 for files modified 8 days ago (including 8 days)
rem that is, files modified on August 17 and earlier
rem ============================================
attrib/s d:\datafile\*.* -h -r -s
:Loop
dirt.com /d:-%theDay% d:\datafile\*.* /q
if %DirtRet%==Fail goto end
del %FPath%\%FName%
goto Loop

:end


******************************************************



The DirT.com and GetInfo.com in it can be downloaded from http://www.13886.com/soft//,


In DOS under win2000, the del command seems to have a parameter that lets you delete files without user confirmation; you can add that parameter to del %FPath%\%FName%

[ Last edited by zybird on 2006-5-6 at 13:38 ]

These two commands are pretty interesting, and quite useful too. Could you upload them here directly as attachments? That website can't be accessed anymore.

Originally posted by Climbing at 2005-8-29 05:02 PM:
These two commands are pretty interesting, and quite useful too. Could you upload them here directly as attachments? That website can't be accessed anymore.

On ys168, for some reason, it always becomes impossible to download, so now I've uploaded them here.

If you have any questions or run into any errors during use, please tell me! Thanks!


Getinfo.com and dirt.com can now be downloaded directly from the website below!!

http://www.13886.com/soft/

[ Last edited by zybird on 2006-5-6 at 13:37 ]

Thanks, friend zybird. Were both of these commands developed with Qbasic?

You're welcome!

This was written with tc++ 3.0

Re All:

Because of personal reasons, I hadn't been on the forum for a week, and I found that quite a lot had changed! Now I am attaching the set /a method mentioned in item 1 of the problem-solving ideas in post 9 for calculating date differences. As for third-party programs, zybird's program is already very good; my respects to brother zybird.

:: DateDel2.bat - delete files modified before the specified number of days under the specified path

:: Will Sort - 2005-9-2 - CMD@WinXP

:: Notes: parameter %1 specifies the number of days; yesterday is 1, the day before yesterday is 2, and so on

::        parameter %1 specifies the file path; if omitted, the current path will be processed

:: Core algorithm: Ritchie Lawrence, updated 2002-08-13. Version 1.1

::

@echo off & setlocal ENABLEEXTENSIONS 

call ate2Day %date:~0,10% sdays

set /a sdays-=%1

call ay2Date %sdays% difdate

echo The following files modified before %difdate% under %cd% will be deleted:

for /r %2 %%f in (*.*) do if "%%~tf" LEQ "%difdate%" echo "%%f"

goto :EOF



ate2Day

setlocal ENABLEEXTENSIONS 

for /f "tokens=1-3 delims=/-, " %%a in ('echo/%1' do ( 

  set yy=%%a & set mm=%%b & set dd=%%c 

)

set /a dd=100%dd%%%100,mm=100%mm%%%100 

set /a z=14-mm,z/=12,y=yy+4800-z,m=mm+12*z-3,j=153*m+2 

set /a j=j/5+dd+y*365+y/4-y/100+y/400-2472633

endlocal&set %2=%j%&goto :EOF 



ay2Date

setlocal ENABLEEXTENSIONS 

set /a i=%1,a=i+2472632,b=4*a+3,b/=146097,c=-b*146097,c/=4,c+=a 

set /a d=4*c+3,d/=1461,e=-1461*d,e/=4,e+=c,m=5*e+2,m/=153,dd=153*m+2,dd/=5 

set /a dd=-dd+e+1,mm=-m/10,mm*=12,mm+=m+3,yy=b*100+d-4800+m/10 

(if %mm% LSS 10 set mm=0%mm%)&(if %dd% LSS 10 set dd=0%dd%) 

endlocal&set %2=%yy%-%mm%-%dd%&goto :EOF 

Question for all you experts,
why is it that under the win2000 command line, environment variables like year mon day etc. cannot be displayed?

D:\MULTIT~1\Getinfo>getinfo /d:-2
D:\MULTIT~1\Getinfo>echo %day%
%day%

Quote:
Originally posted by Climbing at 2005-8-25 17:38:
for /f "tokens=*" %f in ('dir /b/s' do @if %~tf LSS 2005-08-17 echo %~tf %f

Awesome！！！



Agreed！！！

[ Last edited by smileseeker on 2005-10-17 at 20:12 ]

getinfo.com currently still cannot modify environment variables in cmd.exe; cmd.exe is not the same as dos

“for /f "tokens=*" %f in ('dir /b/s') do @if %~tf LSS 2005-08-17 echo %~tf %f”
What does the “%” in there represent? Could someone please explain?

Damn, I can't understand it```` I'm dizzy.

The method above works well for deleting files. Can it avoid deleting folders?

A newbie asking: if the OS regional setting is English and date displays as 10/10/2007 wed, how should the batch file be written??

Expert indeed,,, so awesome... learned a lot