Re: EPOCHREALTIME to days, hours, minutes, seconds

[Emanuele Torre]

also, both [![:digit:]]* and [^[:digit:]]* work for me:

  bash$ declare -p BASH_VERSINFO
  declare -ar BASH_VERSINFO=([0]="5" [1]="1" [2]="8" [3]="1"
[4]="release" [5]="x86_64-pc-linux-gnu")
  bash$ printf '%s\n' "${EPOCHREALTIME%[![:digit:]]*}"
  1629496011
  bash$ printf '%s\n' "${EPOCHREALTIME%[^[:digit:]]*}"
  1629496014

On 20/08/2021, Emanuele Torre <torreemanuele6@gmail.com> wrote:
>> Incidentally, [![:digit:]] does not work there, you need to use the
>> POSIX-specified caret (^) instead of an exclamation mark when using
>> character classes. I'm not sure if this is intentional or a bug in
>> bash; man page doesn't seem to mention it.
>
> I don't think POSIX actually defines character class negation for glob
> patterns
> see:
> https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#tag_18_13_03
>
>
> On 20/08/2021, Tapani Tarvainen <bash@tapanitarvainen.fi> wrote:
>> On Fri, Aug 20, 2021 at 06:39:04PM +0200, Emanuele Torre
>> (torreemanuele6@gmail.com) wrote:
>>
>>> Also, EPOCHREALTIME may not have "." as the decimal delimiter since it
>>> uses the one of the current locale (LC_NUMERIC). So it's more
>>> appropriate to use [!0-9] rather than ".".
>>>
>>>         now=$EPOCHREALTIME
>>>         printf -v second '%(%S)T.%s' "${now%[!0-9]*}" "${now#*[!0-9]}"
>>>         printf -v minute '%(%M)T' "${now%[!0-9]*}"
>>>         printf -v hour '%(%H)T' "${now%[!0-9]*}"
>>
>> Good point. Though of course that may break in locales that
>> have additional digit characters (say, Arabic or Lao).
>> So instead of [!0-9] it'd be better to use [^[:digit]] in there:
>>
>>     now=$EPOCHREALTIME
>>     printf -v second '%(%S)T.%s' "${now%[^[:digit:]]*}"
>> "${now#*[^[:digit:]]}"
>>     printf -v minute '%(%M)T' "${now%[^[:digit:]]*}"
>>     printf -v hour '%(%H)T' "${now%[^[:digit:]]*}"
>>
>> Incidentally, [![:digit:]] does not work there, you need to use the
>> POSIX-specified caret (^) instead of an exclamation mark when using
>> character classes. I'm not sure if this is intentional or a bug in
>> bash; man page doesn't seem to mention it.
>>
>> --
>> Tapani Tarvainen
>>
>>
>