Re: [B2-devel] Preventing double-mounts

[Dave V. <va...@us...>]

On Sun, Jun 24, 2012 at 3:46 PM, Charles Srstka
<bas...@ch...> wrote:
> You can do this
> by passing O_EXLOCK to the open() function. If you want open() to fail
> immediately if the file is already open instead of simply blocking until the
> file is available, then pass O_NONBLOCK as well.

What's the advantage of this over the flock(2) advisory locks I
proposed? As far as I can tell they have the exact same behaviour on
Mac OS X, but flock() is cross-platform and will work on Linux and BSD
as well.

-V