Windows批处理文件仅保留最后30个文件

Question

我写了一个批处理文件,执行以下操作:

REM @ECHO OFF
rem %1 = coid
rem %2 = rpg location with ending /

rem get the path of this cmd script
SET SUBDIR=%~dp0

SET BKUPDIR=%SUBDIR%BACKUPS\
SET LOGFILE=%BKUPDIR%backup.log

ECHO ************************************************* >>%LOGFILE%
ECHO STARTING BACKUP FOR %1 AT %2 >>%LOGFILE%

FOR /f "skip=1" %%x in ('wmic os get localdatetime') DO IF NOT defined mydate SET mydate=%%x
SET filedate=%mydate:~0,14%
SET fullname=%BKUPDIR%%1_%FILEDATE%.ZIP

ECHO BKUPDIR: %BKUPDIR% >>%LOGFILE%
ECHO mydate: %mydate% >>%LOGFILE%
ECHO filedate: %filedate% >>%LOGFILE%
ECHO fullname: %fullname% >>%LOGFILE%
ECHO SUBDIR: %SUBDIR% >>%LOGFILE%

rem lets make sure the backup directory exists before starting
IF NOT EXIST %BKUPDIR% MD %BKUPDIR% >>%LOGFILE%

%SUBDIR%7z a -tzip %fullname%  %2%1*.d
IF ERRORLEVEL 255 ECHO user_stopped_the_process >>%LOGFILE%
IF ERRORLEVEL 8 ECHO not_enough_memory >>%LOGFILE%
IF ERRORLEVEL 7 ECHO command_line_error >>%LOGFILE%
IF ERRORLEVEL 2 ECHO fatal_error >>%LOGFILE%
IF ERRORLEVEL 1 ECHO ok_warnings >>%LOGFILE%

IF ERRORLEVEL 0 GOTO END
IF EXIST %fullname% DEL %fullname%

:END
ECHO FINISHING BACKUP FOR %1 >>%LOGFILE%
ECHO ************************************************* >>%LOGFILE%
set mydate=

我将文件保存为文件的%1创建日期/时间:

SSS_20130110133304.ZIP 
SSS_20130110133336.ZIP

我在任务调度程序中运行它来每晚运行.

我想避免在目录中有太多的zip文件,所以我想保留最后30个zip文件.

我陷入了困境.如何保留最新的30个zip文件,以便我最终得到一堆垃圾邮件文件？

Answer 1

这将列出从最新到最旧的.zip文件(按创建日期),跳过前30个文件.

for /f "skip=30 delims=" %%A in ('dir /a:-d /b /o:-d /t:c *.zip ^2^>nul') do if exist "%%~fA" echo "%%~fA"

只要改变echo来del当你想真正删除这些文件.:)