China DOS Union

I want to create a batch file that can do writing, and write characters like ">""nul" into AUTOEXEC.BAT

For example, I want to write del 123.456>nul into AUTOEXEC.BAT
But I found that when I write echo del 123.456>nul>autoexec.bat
what gets written into autoexec is only del 123.456
and the following ">nul" is gone. What's going on?

How can I use a batch file to write characters like ">nul" into another file?
Thanks!!!!

---------- Edited by willsort ----------
Original title changed to: Batch file question
---------- Edited by willsort ----------

[ Last edited by willsort on 2005-10-14 at 13:41 ]

Man, can't you just honestly use edit to edit the batch file? If you use edit you won't have this headache. Because >NUL is also a special use of the redirection operator under DOS, DOS won't know that this is a character you want to write rather than a redirection operator. In fact DOS will treat it as a redirection operator, and thus interpret it as the command being executed directly. Naturally it won't be treated as characters and redirected into autoexec.bat anymore.

You can use an ECHO enhancement tool to accomplish this. It can be found in the site's "script tools":
http://www.cn-dos.net/newdos/doswaren.html

You did that on purpose, right!

Re AAAAAAA:

A simple method, suitable for DOS6.22:

%comspec% /c prompt del 123.456$gnul>autoexec.bat

Similar input includes:

$l less-than sign
$p pipe symbol

[ Last edited by willsort on 2005-10-14 at 13:39 ]

Write it like this

Overwrite autoexec.bat
echo del 123.456 >autoexec.bat

Append del 123.456 to the end of autoexec.bat
echo del 123.456 >>autoexec.bat

Use echo ^>nul >somebat.bat