grep for \x00 = NUL

[Dave Korn]

----Original Message----
>From: fergus
>Sent: 19 July 2005 17:16

> Sorry, probably off topic but so tantalising and so easily stated I
> thought I'd try you. Using grep to locate hex characters in files I've
> used the syntax
> 
> 	grep $'\x0d' # e.g. equivalent to grep "^M"
> 	grep $'\x1a' # e.g. equivalent to grep "^Z"
> 
> and found this to work for all \x01 to \xff, that's 255 of the 256 one
> might be interested in looking for. (Well, I haven't tried them all, but
> a lot of them.) What I still can't do (actually, what I most wanted to
> do) is search for the NUL \x00. Nothing in info bash indicated that this
> approach would not work for \x00, but as far as I can tell, it doesn't:
> files that do not contain \x00 are listed as containing it (try grep
> $'\x00' *). 
> 
> Is it a bug?


  What character is used to indicate the end of a string in C?


    cheers,
      DaveK
-- 
Can't think of a witty .sigline today....


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