On Wed, Oct 19, 2011 at 10:49:53AM +0000, YAMAMOTO Takashi wrote:
> some dtrace ioctls, including DTRACEIOC_AGGSNAP, are defined as
> the following.
>
> #define DTRACEIOC_AGGSNAP _IOW('x',7,dtrace_bufdesc_t *)
>
> and libdtrace has diffs like the following.
>
> #if defined(sun)
> if (dt_ioctl(dtp, DTRACEIOC_AGGSNAP, buf) == -1) {
> #else
> if (dt_ioctl(dtp, DTRACEIOC_AGGSNAP, &buf) == -1) {
> #endif
>
> they seem weird to me.
> why can't they be like the following?
>
> _IOW('x',7,dtrace_bufdesc_t)
I don't see any obvious reason... even though dtrace_bufdesc_t is not
actually a primitive type, it's only a 40-byte structure, so it should
be fine...
--
David A. Holland
[email protected]
