On Mon, 21 Jun 2004, Greg A. Woods wrote:
> strtoul() can't, or at least our version doesn't, do reliable overflow
> detection when the maximum value expected is the same as ULONG_MAX

strtoul() and friends are documented to set errno = ERANGE on overflow.
I had a quick look at the implementation, and don't see any obvious
bugs.  So you should be able to do something like this:

	errno = 0;
	result = strtoul(...);
	if (result == ULONG_MAX && errno == ERANGE) {
	   ...
	}

--apb (Alan Barrett)