Re: EPOCHREALTIME to days, hours, minutes, seconds

[Alex fxmbsw7 Ratchev]

and if u re looking to benchmark, you cannot use the seconds var cause one
second plus minus is no good benchmark
at least for fast exact stuff

On Fri, Aug 20, 2021, 14:27 Alex fxmbsw7 Ratchev <fxmbsw7@gmail.com> wrote:

> EPOCHSECONDS doesnt have . dot ... EPOCHREALTIME has
>
> On Fri, Aug 20, 2021, 14:22 hancooper <hancooper@protonmail.com> wrote:
>
>> ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
>> On Friday, August 20, 2021 7:52 AM, Andreas Kusalananda Kähäri <
>> andreas.kahari@abc.se> wrote:
>>
>> > On Fri, Aug 20, 2021 at 10:04:27AM +0300, Tapani Tarvainen wrote:
>> >
>> > > On Thu, Aug 19, 2021 at 06:38:12PM +0000, hancooper via (
>> help-bash@gnu.org) wrote:
>> > >
>> > > > Is there a neat way to convert from decimal seconds (result from
>> > > > EPOCHREALTIME) to days, hours, minutes, seconds?
>> > >
>> > > If you are treating it as a date (rather than a time difference),
>> > > you can do simply
>> > > A=$EPOCHREALTIME
>> > > date -d @$A +'%d %H:%M:%S'
>> > > Adjust format to taste.
>> > > If it's a time difference but less than a year, and you want days,
>> > > hours, minutes and seconds in variables, you can do it like this:
>> > > eval $(date -d @$A +'days=%j hours=%H minutes=%M seconds=%S.%N')
>> >
>> > Quoting would be nice.
>> >
>> > > days=$((days-1))
>> > > If you want to discard extra zeroes:
>> > > seconds=${seconds%000}
>> > > seconds=${seconds#0}
>> > > hours=${hours#0}
>> > > minutes=${minutes#0}
>> >
>> > If you're using bash but don't have other GNU tools installed, and only
>> > want second granularity, then use printf instead:
>> >
>> > now=$EPOCHSECONDS
>> > printf -v seconds '%(%S)T' "$now"
>> > printf -v minutes '%(%M)T' "$now"
>> > printf -v hours '%(%H)T' "$now"
>>
>>
>> How can I deal with seconds that includes fractional part ?
>>
>> This produces error
>>
>> Elapsed Time bash: printf: 13.506899: invalid number
>> bash: printf: 13.506899: invalid number
>> bash: printf: 13.506899: invalid number
>> bash: printf: 13.506899: invalid number
>>
>>
>> now=$EPOCHSECONDS
>> printf -v seconds '%(%S)T' "$t"
>>
>>
>>