Re: CVS commit: src/sys/compat

[Alan Barrett <apb%netbsd.org@localhost>]

On Wed, 04 Jan 2012, Matthias Drochner wrote:
> > Log Message: Provide a COMPAT_50 version of the 
> > CLOCKCTL_NTP_ADJTIME ioctl. When time_t was changed from 32 
> > to 64 bits, this ioctl's number was changed from _IOWR('C', 
> > 0x4, struct clockctl_ntp_adjtime) to _IOWR('C', 0x8, struct 
> > clockctl_ntp_adjtime), but the data structure did not change, 
> > so all the compat code has to do is change the number and try 
> > again.
>
> If this just fixes a mistake which doesn't affect a released 
> version, it should be OK to fix the ioctl number (and send a 
> heads-up to current-users).

I think it's OK to break compatibility for current users when it's 
been only a short time since the change, but it's now been about 
three yers since the 64-bit time_t changes, so I really don't want 
to break compatibility.

--apb (Alan Barrett)