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我做了一些修改: 
 1. 在cmd.bat中,echo命令有时候不能正常工作。可能是由于第9行的if exist cmd && %cmd%,修改为if exist cmd %cmd%即可。 
 2.将run_cmd标签中的goto :%1 || exit修改为if not exist (bd)/boot/grub/%1 goto :%1 || exit。即如果(bd)/boot/grub/中存在与%1同名的外部命令,则优先执行它,否则执行cmd.bat的子命令。 
- !BAT
 
 - :Loop
 
 - debug off
 
 - pager off
 
 - errorcheck off
 
 - set cmd=
 
 - set /p cmd=%@root%> 
 
 - debug off
 
 - call :run_cmd %cmd%
 
 - if exist cmd %cmd%
 
 - goto :Loop
 
 - :run_cmd
 
 - if "%~1"=="" exit
 
 - if not exist (bd)/boot/grub/%1 goto :%1 || exit
 
 - exit
 
 - :dir
 
 - set cmd=ls %cmd:~3%
 
 - exit
 
 - :type
 
 - set cmd=cat %cmd:~4%
 
 - exit
 
 - :cd
 
 - set cmd=%2
 
 - if not exist cmd && set cmd=echo %@root% && exit
 
 - if "%cmd:~0,1%"=="(" && set cmd=root %cmd% && exit
 
 - if "%cmd:~0,1%"=="/" && set cmd=root ()%cmd% && exit
 
 - if not "%cmd%"==".." set cmd=root %@root%/%cmd% && exit
 
 - set cmd=%@root%
 
 - call :cd_up
 
 - set cmd=root %cmd%
 
 - exit
 
 - :cd_up
 
 - if "%cmd:~-1%"=="/" exit
 
 - if "%cmd:~-1%"==")" exit
 
 - set cmd=%cmd:~0,-1%
 
 - goto :cd_up
 
  复制代码 |   
- 
 
 
- 
cmd.zip
 
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