Re: Theo chiming in on strlcpy

[David Laight <david%l8s.co.uk@localhost>]

On Sun, Dec 22, 2013 at 09:05:44PM +0100, Holger Weiss wrote:
> > 
> > Okay, show me your code.
> 
>     static char *
>     concat(const char *s1, const char *s2)
>     {
>         size_t l1 = strlen(s1);
>         size_t l2 = strlen(s2);
>         size_t size;
> 
>         if (((size = l1 + l2) <= l1 && l2 != 0) || ++size == 0)
>             abort(); /* Handle `size_t' overflow. */
>         return strcat(strcpy(xmalloc(size), s1), s2);
>     }

And now another thread changes the data between the strlen()
and strcpy/strcat() calls...

        David

-- 
David Laight: david%l8s.co.uk@localhost