linux-kernel - Re: [PATCH 01/40] lib/string_helpers: Drop space in string_get

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Message-ID: <20230501213349.bvbf6i72eepcd56m@revolver>
Date:   Mon, 1 May 2023 17:33:49 -0400
From:   "Liam R. Howlett" <Liam.Howlett@...cle.com>
To:     Andy Shevchenko <andy.shevchenko@...il.com>
Cc:     Kent Overstreet <kent.overstreet@...ux.dev>,
        Suren Baghdasaryan <surenb@...gle.com>,
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Subject: Re: [PATCH 01/40] lib/string_helpers: Drop space in
 string_get_size's output

* Andy Shevchenko <andy.shevchenko@...il.com> [230501 15:57]:
> On Mon, May 1, 2023 at 10:36 PM Kent Overstreet
> <kent.overstreet@...ux.dev> wrote:
> >
> > On Mon, May 01, 2023 at 11:13:15AM -0700, Davidlohr Bueso wrote:
> > > On Mon, 01 May 2023, Suren Baghdasaryan wrote:
> > >
> > > > From: Kent Overstreet <kent.overstreet@...ux.dev>
> > > >
> > > > Previously, string_get_size() outputted a space between the number and
> > > > the units, i.e.
> > > >  9.88 MiB
> > > >
> > > > This changes it to
> > > >  9.88MiB
> > > >
> > > > which allows it to be parsed correctly by the 'sort -h' command.
> 
> But why do we need that? What's the use case?
> 
> > > Wouldn't this break users that already parse it the current way?
> >
> > It's not impossible - but it's not used in very many places and we
> > wouldn't be printing in human-readable units if it was meant to be
> > parsed - it's mainly used for debug output currently.
> >
> > If someone raises a specific objection we'll do something different,
> > otherwise I think standardizing on what userspace tooling already parses
> > is a good idea.
> 
> Yes, I NAK this on the basis of
> https://english.stackexchange.com/a/2911/153144

This fixes the output to be better aligned with:
the output of ls -sh
the input expected by find -size

Are there counter-examples of commands that follow the SI Brochure?

Thanks,
Liam