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Number   :  4757
Date     :  2003-06-05
Author   :  Garry Deane
Subject  :  Re: xxcopy to CD-RW
Size(KB) :  1


--- In xxcopy@yahoogroups.com, Kan Yabumoto  wrote:

> I just wonder if they ever came up with a cleaner
> version to make the errorlevel test less awkward.
> 
> That is, the following mess should be cleaned up
> with something more straightforward.
> 
> if errorlevel 10 if not errorlevel 11 ...
> 
> to something like
> 
> if erroris 10 ...
> 

Yes, this has been tidied up. Errorlevel is now assigned to
the environment variable %errorlevel%. The old "IF 
errorlevel nnn" syntax still works but now you can do:

if %errorlevel% == 5 ...
if %errorlevel% EQU 10 ...
if %errorlevel% LSS 20 ...
if %errorlevel% GEQ 15 ...

Additionally there are 2 new conditional pipes, && and ||
which execute depending on the success or failure of the
preceding command.

echo test |find "sr" > nul && echo found||echo not found

The batch language in CMD.EXE has been strengthened quite
remarkably from that in COMMAND. The extensions to FOR, SET,
IF, CALL and others make it a quite capable tool.
If anyone is interested, take a look at
http://www.commandline.co.uk/cmdfuncs/dandt/index.html.
Your eyes will probably glaze over at what is there but it
will give a feel for what can be achieved with the 'humble'
batch language.


> As to the final version, the following is my final
> version which will be included in our future releases
> of the XXCOPY package.
> 
> ----------------------------------------------------
> if "%OS%"=="Windows_NT" ((cd /d %~dp0)&(goto next))
> echo %0 | find.exe ":" >nul
> if not errorlevel 1 %0\
> cd %0\..
> :next
> ----------------------------------------------------

Yes much tidier. I should have thought of that myself. The
usual problem of getting too close to the writing/code that
the obvious is overlooked.

Garry



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