dtrace: give %'d a chance?

[Andriy Gapon]

On 19/11/2020 16:57, Mark Johnston wrote:
> On Thu, Nov 19, 2020 at 01:28:56PM +0200, Andriy Gapon wrote:
>>
>> what do people think about adding
>>     setlocale(LC_NUMERIC, "");
>> to dtrace's main function?
> 
> That seems reasonable to me.
> 
>> My primary interest is to (pretty-)print some numbers with a thousands separator.
>>
>> Not sure if any other LC_ types are worth bothering.
> 
> Maybe LC_TIME?  libdtrace a couple of date formatters, %T and %Y.  A
> locale-aware formatter might be worth having.

FWIW, I've just discovered that despite what
http://dtrace.org/guide/chp-fmt.html says about %Y its output is not dependent
on locale settings.
A quick look at the code confirms that -- pfprint_time uses ctime_r.
But %T (undocumented at the above link) indeed depends on LC_TIME as
pfprint_time822 uses strftime("%a, %d %b %G %T %Z").

Sample output in C locale:
10000000
Mon, 30 Nov 2020 13:47:24 UTC
2020 Nov 30 13:47:24

The same formats (%'d, %T, %Y) in uk_UA locale:
10 000 000
Пн, 30 лист. 2020 13:43:11 UTC
2020 Nov 30 13:43:11

-- 
Andriy Gapon