parse_and_open without closing the fd

[Keith Busch]

On Mon, Nov 20, 2017 at 03:04:36PM -0500, Thomas Tai wrote:
> I am trying to add a new command in nvme-cli and use flush() in nvme.c as an
> example. The flush command use parse_and_open() to open the fd, but it never
> close the fd. I am wondering where about the fd is being closed.

It's implicitly closed on exit. This is a short-lived one-shot program,
so there is some laziness with accounting for all resources that are
automatically reclaimed. That said, it's still nice to clean this up as
we find such examples.