OpenSSH -current fails regression on Solaris 8, sshd dumps core

[Frank Cusack]

On Sun, Sep 22, 2002 at 04:59:30PM -0500, Sam Reynolds wrote:
> On Sat, Sep 21, 2002 at 01:20:19PM -0500, Sam Reynolds wrote:
> 
>  >No, it isn't.  NULL is guaranteed to be a macro expanding to an
>  >"unadorned 0".
> I don't believe in C such a guarantee is given.
> 7.17.3 in C99 says:
> "... NULL which expands to an implementation-defined null
> pointer constant..."
> 6.23.2.3.3 explains that a null pointer constant is:
> "An integer constant expression with the value 0, or such
> an expression cast to type void *"

I stand corrected!

>  >> and since sprintf is a variadic function, one would
>  >> need an explicit cast to the appropriate type.
> 
>  >No, one doesn't.  A variadic function interprets pointers based on the
>  >format string, not based on the type given to the compiler.
> 
> One does for two reasons. The first being a situation where my format
> string is input from the user, clearly the compiler can't know what the
> args are going to be at compile time.

In which case, how are you going to know what to cast to?

> Second, if I write my own
> variadic function the compiler will not know what the arguments to
> my function are if I don't explicitly cast them (if they are void*).

huh?

/fc