Re: [Qemu-devel] -serial stdio broken

[Anthony Liguori]

On 01/07/2010 06:44 AM, Daniel P. Berrange wrote:
> NB, QEMU 0.12 introduces a new flag '-nodefaults' that can be used to
> get rid of this imlied 'serial stdio', and all other implied devices.
> It is well worth using this new -nodefaults flag if you're managing
> qemu from an app to avoid these surprises
>
> eg this should work as you'd expect it
>
>    qemu -nodefaults -nographic -serial stdio
>    

-nographic is basically equivalent to -serial mon:stdio,signal=on -vga 
none except it operates on defaults.  Your invocation actually ends up 
being very different as it doesn't multiplex the monitor and it doesn't 
disable ctrl-c.  Basically, your invocation is equivalent to qemu -vga 
none -serial stdio

The "bug" is the original invocation's addition of '-serial stdio'.  
That was basically ignored previously but you could imagine subtle 
changes in semantics (like ctrl-c behavior) that it could and arguably 
should have introduced.

Regards,

Anthony Liguori