Calling strcmp/strncmp/strcasecmp/strncasecmp with NULL parameter

[Petter Reinholdtsen]

[Steven Keuchel]
> What does the C Standard say about this ?

I suggest you have a look at
<URL:http://www.opengroup.org/onlinepubs/009695399/toc.htm>, and
discover that the standard consider it undefined behaviour to call for
example strcmp() with illegal arguments.  The code calling strcmp()
like this is broken, and need to be fixed.