Re: [PATCH] Change attachment stamping to use stat st_mtime by default.

Good to know. I see that gettimeofday() in glibc effectively wraps 
clock_gettime() (using CLOCK_REALTIME). Is that not guaranteed to be the 
same syscall as any that might be used for the filesystem? If not, what 
other clock might be used? It seems pretty inconvenient if filesystem 
timestamps aren't somewhat guaranteed to be comparable to a known clock.

I was just thinking that, if the current function uses time(), a call to 
something like clock_gettime would alleviate the problem with the coarse 
seconds from time(). But it sounds like you're saying it's just 
generally more accurate to use stat() (which doesn't seem too onerous in 
this case).

On 8/20/26 22:14, Vincent Lefevre wrote:
> On 2026-08-20 17:26:01 -0400, Reed Underwood wrote:
>> Would it be preferable to just use gettimeofday (or another function that
>> guarantees subsecond precision) and use only the seconds?
> gettimeofday is no longer in any standard. It was replaced by
> clock_gettime. But anyway, it is not possible to know which clock
> is the same as the one used for the filesystem. Since the value
> will be compared to st_mtime from stat(), it is better to also
> use stat() for the comparison.
>