Re: [PATCH] Use NULL in vararg

[Werner Koch <wk@xxxxxxxxx>]

On Mon, 8 Nov 2004 17:04:58 +0100, Ralf Wildenhues said:

>       snprintf (fmt, sizeof(fmt), "%%%ss", prefix);
> -     snprintf (buf, buflen, fmt, Context ? Context->pattern : 0);
> +     snprintf (buf, buflen, fmt, Context ? Context->pattern : NULL);

Assuming a prefix of "%s", NULL is not a good idea because %s is not
guaranteed to print something like "(null)" as glibc does.  Some libcs
will simply segv here.  The proper way (if semantically okay) is to
use 

        snprintf (buf, buflen, fmt, Context ? Context->pattern : "(null)");


Salam-Shalom,

   Werner