Re: [Qemu-block] [Qemu-devel] [PATCH] block.c: fix real cdrom detection

[Paolo Bonzini]

On 25/06/2015 19:56, Programmingkid wrote:
>> In fact, programmingkid, you should fix it in hdev_open() where
>> there is already a #if __APPLE__ .
> 
> Nice to hear from you again Laurent. The only way a solution in
> hdev_open() would work is if it could prevent find_image_format()
> from executing. Otherwise find_image_format() would just quit QEMU
> with an error.

You have to implement an is_inserted function like this one that is
already there for FreeBSD:

static int cdrom_is_inserted(BlockDriverState *bs)
{
    return raw_getlength(bs) > 0;
}

The point you're changing is _already_ testing bdrv_is_inserted.

Look at the block starting like this:

#if defined (__FreeBSD__) || defined(__FreeBSD_kernel__)
static int cdrom_open(BlockDriverState *bs, QDict *options, int flags,
                      Error **errp)

and create a similar one that is #ifdef __APPLE__.  Feel free to remove
pieces that you don't know how to do in OS X / CoreFoundation.

Paolo