Re: DND crash through all versions?

[Tony Trinh <tony19 () gmail com>]

On Mon, Sep 3, 2012 at 5:50 PM, Jaap Keuter <jaap.keuter () xs4all nl> wrote:

> Anyone knows what strstr() does with a NULL for a haystack? As far as I
> can tell it's unspecified.


I think you're right. "Undefined/unspecified behavior" usually means a
segfault from my experience. This is true for strstr() in OSX ML.

strstr() apparently does not null-check its parameters in the latest
versions of Linux [1], OSX/Darwin (and probably other Un*x) [2], and
Windows [3]. I couldn't find the Windows source for strstr(), but MSDN
indicates:

strstr and wcsstr do not validate their parameters.


Interestingly, Windows does have an error handler in _mbsstr() for invalid
parameters.

[1]: http://lxr.linux.no/linux+v3.5.3/lib/string.c
[2]: http://www.opensource.apple.com/source/xnu/xnu-792.13.8/libsa/strstr.c
[3]: http://msdn.microsoft.com/en-us/library/z9da80kz.aspx

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