Re: [RFC PATCH util-linux] Support hwclock read and set operations for Hurd

[Zhaoming Luo]

On 12/3/24 6:48 AM, Samuel Thibault wrote:
> Zhaoming Luo, le mar. 03 déc. 2024 06:42:07 +0800, a ecrit:
> > On 12/2/24 10:12 AM, Samuel Thibault wrote:
> > > Please factorize these with the linux port, by putting them into a
> > > shared file that is linked-in in both ports cases.
> > Do you mean having the following structure?
> >           /----- hurd-hwlock-rtc.c \
> > hwclock.c                           hwclock-rtc.c
> >           \----- linux-hwlock-rtc.c /
> >
> > hwclock-rtc.c contains close_rtc, open_rtc, etc.
>
> Yes.
I think another of supporting hwclock in Hurd is implementing more ioctl 
calls (RTC_UIE_ON, RTC_PARAM_GET, etc) for rtc. The current compile 
errors seem to be mainly due to the lack of RTC ioctl macros (i.e. 
RTC_UIE_ON, etc). The issues with __u64, __s64, and __u32 (they seem to 
be Linux-specific) can be solved by using:

```
#ifdef __gnu_hurd__
typedef unsigned long long __u64;
typedef signed long long __s64;
typedef unsigned int __u32;
#endif
```

Providing a rtc ioctl interface similar to Linux can avoid large change 
on util-linux upstream. Maybe I should go this way?

--
Zhaoming Luo