Re: [B2-devel] Preventing double-mounts

[Alexei S. <ale...@gm...>]

On Sun, Jun 24, 2012 at 3:46 PM, Charles Srstka <
bas...@ch...> wrote:
>
> I just tested this on Snow Leopard and Lion, and it works. When you’ve got
> a disk image mounted, open(path, O_RDWR | O_EXLOCK | O_NONBLOCK) fails with
> EAGAIN. If I’ve got a disk image open with O_EXLOCK and then I try to mount
> it in the Finder, DiskImageMounter fails with “Resource temporarily
> unavailable”. So this should do what you want without having to monkey with
> permanent metadata bits on the file.
>

Cool! Does this work well if SheepShaver crashes? (e.g. does the lock get
removed in that case?)

-Alexei