0 and pointers.( Re: Abandon NULL for (0))

[Henry Spencer]

In article <2550109 at hpisod2.HP.COM> decot at hpisod2.HP.COM (Dave Decot) writes:
>> ... arbitrarily changing the specs for signal handlers was a
>> terrible mistake and very unportable.  Defining a new interface is the
>> right approach.
>
>Since the variadic functions in questions are the signal handlers, designing
>a new interface that permits preserving old behavior seems very difficult.

No it's not; you just need a new variant of signal() which is used when
establishing a variadic handler.  (In POSIX, actually, it's easier than that,
because the POSIX equivalent of signal() has a "flags" field in the
structure it receives.)  Then the system knows whether the handler is
normal or variadic and can cope accordingly.
-- 
A bit of tolerance is worth a  |     Henry Spencer at U of Toronto Zoology
megabyte of flaming.           | uunet!attcan!utzoo!henry henry at zoo.toronto.edu