Re: more adequate usage msg: pg_controldata.diff

Peter Eisentraut wrote:
> Bruce Momjian writes:
>
> > > I explained in my last message that this patch is wrong. Please revert
> > > it. (DATADIR is not an option and therefore it shouldn't be listed in the
> > > options list.)
> >
> > I tried to subtely point out that it is optional.
>
> But the help output is wrong. It lists DATADIR as an option, which it is
> not. (An option is something like -a or --foo. The other things are
> arguments.) See my message to Serguei about how to do it better.

It is my understanding that -a and the like are _flags_. PGDATA is an
optional argument, or "option" for short. I don't see how having a dash
is required to make something an option. When I do:

cat [-t -v] [file ...]

I consider "file" to be an optional argument, or option. It of course
isn't a flag.

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