On 12/14/12 14:45, Paolo Bonzini wrote:
> Il 14/12/2012 14:18, Gerd Hoffmann ha scritto:
>> Hi,
>>
>>> { 'enum': 'ChardevFileMode', 'data':
>>> # pty = console under Windows
>>> # serial = tty under POSIX
>>> [ 'file', 'pipe', 'parport', 'pty', 'serial' ] }
>>
>> Hmm, why this enum? I'd stay close to -chardev, i.e. specify the type
>> by backend name.
>
> Because...
>
>>> { 'enum: 'ChardevFileSource', 'data':
>>> [ 'path', 'fd' ] }
>>
>> I guess I'd just create a new backend type for file descriptor passing
>> instead of fitting that into all the existing ones.
>
> ... are you passing a file descriptor for a pipe, a file or a
> parallel/serial port?
The open function of the file-based backends basically do (1) create
file handles and (2) call qemu_chr_open_fd(). So of you already have an
fd the differences are gone. Well, almost. tty has an special ioctl
callback to configure line speed.
cheers,
Gerd
