GNU bug report logs - #71986
RFC: date @ to support ms.

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Richard Neill <rn214 <at> cam.ac.uk>
Subject: bug#71986: closed (Re: bug#71986: RFC: date @ to support ms.)
Date: Tue, 09 Jul 2024 12:40:02 +0000

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Your bug report

#71986: RFC: date @ to support ms.

which was filed against the coreutils package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 71986 <at> debbugs.gnu.org.

-- 
71986: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=71986
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Paul Eggert <eggert <at> cs.ucla.edu>
To: Richard Neill <rn214 <at> cam.ac.uk>
Cc: 71986-done <at> debbugs.gnu.org
Subject: Re: bug#71986: RFC: date @ to support ms.
Date: Tue, 9 Jul 2024 14:39:15 +0200

On 7/9/24 03:19, Richard Neill wrote:

> IP_JSON=$(curl https://whatsmyip.dev/api/ip)
> TS=$(echo $IP_JSON | jq '.ts' -r)
> TS=$(echo "$TS/1000" | bc)
> DATE=$(date --date @$TS)

This is better, as it saves on subprocesses:

IP_JSON=$(curl https://whatsmyip.dev/api/ip)
TS=$(jq -nr "$IP_JSON|.ts")
DATE=$(date -d @$((TS / 1000)))


> Anyway, I don't want to waste everyone's time, so if I haven't convinced 
> you, I'll leave it here, and say thank you very much for your 
> consideration.

You're welcome; closing the bug report.

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From: Richard Neill <rn214 <at> cam.ac.uk>
To: bug-coreutils <at> gnu.org
Subject: RFC: date @ to support ms.
Date: Sun, 7 Jul 2024 20:46:45 +0100

Hello,

I've noticed a lot of systems now return the timestamp in milliseconds 
since the epoch, rather than seconds. This means that e.g.

  date --date='@1720378861258'

will do something rather unexpected!

May I suggest that it would be nice if date had an input format that 
would let me specify that the value is in ms?

I know we can bodge it with bc, or by injecting the decimal, or trimming 
off the last 3 chars, but that seems inelegant, and requires extra 
thinking (and hence bugs) from the programmer.
  date --date='@1720378861.258'

Perhaps one of these syntaxes might be suitable?

 date --date='@ms1720378861258'
 date --date='@@1720378861258'
 date --epoch-ms --date='@1720378861258'

Thanks very much,

Richard

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