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Date: Wed, 9 Apr 2014 13:19:03 +0300
From: Timo Teras <timo.teras@....fi>
To: musl@...ts.openwall.com
Cc: u-igbb@...ey.se
Subject: Re: memmem() - is it correct?
On Wed, 9 Apr 2014 12:08:40 +0200
u-igbb@...ey.se wrote:
> A test case adapted from elsewhere:
> ----
> #include <string.h>
>
> main(){
> const char *haystack = "abcde";
> return(!memmem(haystack, 4, "cde", 3));
> }
> ----
>
> returns 1 (as I would expect it to) if linked against uclibc
> returns 0 if linked against musl
> (on ia32)
>
> Any comments?
musl looks correct to me. "abcde" is five bytes. You test for 4 bytes
so it's infact searching from haystack equivalent of "abcd".
I'd say uclibc is off-by-one, and broken.
- Timo
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