On 30/11/2020 01:40 pm, Bernhard Voelker wrote:
On 11/30/20 2:13 PM, 積丹尼 Dan Jacobson wrote:
$ date -I=seconds
date: invalid argument ‘=seconds’ for ‘--iso-8601’

Hmm, first of all, 'date' 8.32 outputs more than the above:

   $ date -I=seconds
   date: invalid argument '=seconds' for '--iso-8601'
   Valid arguments are:
     - 'hours'
     - 'minutes'
     - 'date'
     - 'seconds'
     - 'ns'
   Try 'date --help' for more information.

Hey, that is a valid argument for --iso-8601. (But not for -I, so say
that instead.)
...
date (GNU coreutils) 8.32

From the above error message and from the --help output, one can see that
the -I option does not require the argument to be appended with "=FMT" but
just "FMT":

   $ date --help | grep -- -I
     -I[FMT], --iso-8601[=FMT]  output date/time in ISO 8601 format.

So, I'd say 'date' works as expected:

   $ date -Iseconds
   2020-11-30T14:38:35+01:00

Have a nice day,
Berny





Is -I the only option that doesn't accept a space separator between it and its argument? Is that because it doesn't require an argument?

Could/Should the argument after -I be parsed and used if it is one of date hours minutes seconds ns? (Could it also parse for mins secs?) But used as a separate option if not parsed as an argument?

Is this too difficult?

Cheers

--

Chris Elvidge





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