Re: [Qemu-devel] To O_EXCL or not to O_EXCL open host_cdrom

[Kevin Wolf]

Am 12.04.2011 09:52, schrieb Daniel P. Berrange:
>  - If the -drive specification has  readonly=on (thus O_RDONLY to
>    open(2) call) , I expect QEMU (or the kernel) to forbid the
>    "eject" command on the host CDROM. This should prevent two guests
>    interfering seriously with each other.
> 
> So I think using O_EXCL would be OK, in the case where the block
> driver was  host_cdrom and readonly=off.

This would overload readonly with a completely unrelated option (should
eject be allowed). Doesn't sound like a great idea.

Kevin