Re: test if a subvolume is a snapshot?

[Hugo Mills <hugo@carfax.org.uk>]

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On Fri, Sep 08, 2017 at 05:12:11PM +0100, Tomasz Kłoczko wrote:
> On 8 September 2017 at 16:38, Hugo Mills <hugo@carfax.org.uk> wrote:
> [..]
> >> sometimes I'm really thinking about start rewrite btrfs-progs to make
> >> btrfs basic tools syntax as similar as it is only possible to ZFS zfs,
> >> zpool and zdb commands on using which in +90% cases you can guess how
> >> necessary syntax must look like without looking on man pages.
> >>
> >> Any volunteers want to join to help implement something like this?
> >> Maybe someone already started doing this?
> >
> >    The main complaint that can be directed at the btrfs command is
> > that its output is rarely machine-processable. It would therefore make
> > sense to have a "--table" or "--structured" mode for output, which
> > would be more trivially parsable by shell tools.
> 
> Output of the btrfs command it is coooooompletely different pair of shoes.
> On making btrfs tools similar to ZFS analogues *obviously* output
> should be as same similar.
> By this would possible to solve complains about unreadable output in one go.
> 
> For example zfs command parseable output is possible to generate by
> add -p switch in those subcommands where it is needed (no --tables or
> --structures .. just one switch).

   --tables _is_ one switch.

> Instead reinventing the wheel just please try to look first how it is

   What in what I said was reinventing a wheel? Literally the *only*
thing I was suggesting was adding some option to make the btrfs tool
output more machine-parsable.

   Call the option whatever you like. However, note that there are
probably very few single-letter options which are not used in at least
one of the btrfs tool subcommands.

   Hugo.

-- 
Hugo Mills             | How do you become King? You stand in the marketplace
hugo@... carfax.org.uk | and announce you're going to tax everyone. If you
http://carfax.org.uk/  | get out alive, you're King.
PGP: E2AB1DE4          |                                        Harry Harrison

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