Re: [Qemu-devel] [PATCH v2] Add chardev-send-break monitor command

[Stefan Fritsch]

On Thursday, 29 June 2017 16:00:54 CEST Dr. David Alan Gilbert wrote:
> * Eric Blake (address@hidden) wrote:
> > On 06/11/2017 02:48 AM, Stefan Fritsch wrote:
> > > Sending a break on a serial console can be useful for debugging the
> > > guest. But not all chardev backends support sending breaks (only telnet
> > > and mux do). The chardev-send-break command allows to send a break even
> > > if using other backends.
> > > 
> > > Signed-off-by: Stefan Fritsch <address@hidden>
> > > Acked-by: Dr. David Alan Gilbert <address@hidden>
> > > ---
> > > v2: added tests and Acked-by line
> > > 
> > > 
> > > +++ b/hmp-commands.hx
> > > @@ -1745,6 +1745,22 @@ Removes the chardev @var{id}.
> > > 
> > >  ETEXI
> > >  
> > >      {
> > > 
> > > +        .name       = "chardev-send-break",
> > > +        .args_type  = "id:s",
> > > +        .params     = "id",
> > > +        .help       = "send break on chardev",
> > 
> > Compare this wording,...
> > 
> > > +STEXI
> > > address@hidden chardev-send-break id
> > > address@hidden chardev-send-break
> > > +Sends break on the chardev @var{id}.
> > 
> > repeated here,
> > 
> > > +++ b/qapi-schema.json
> > > @@ -5114,6 +5114,26 @@
> > > 
> > >  { 'command': 'chardev-remove', 'data': {'id': 'str'} }
> > >  
> > >  ##
> > > 
> > > +# @chardev-send-break:
> > > +#
> > > +# Send a break to a character device
> > 
> > ...with this wording.  I like 'send a break' better than 'send break',
> > but even better might be 'send a break sequence' or even 'emulate a
> > break sequence' (by definition, a break is NOT a character, but on bare
> > metal character devices it IS a defined electrical sequence distinct
> > from characters to make the recipient aware that the sender is trying to
> > get attention).
> > 
> > Otherwise, the patch looks fine to me.  If all that changes is some
> > word-smithing (and the maintainer may be willing to do that), you can add:
> > Reviewed-by: Eric Blake <address@hidden>
> 
> I'll go with the 'send a break' - the official terminology seems to
> be a 'break condition', but I've never heard anyone say that,
> it's always been 'send a break'.

I also think that "send a break" is best for people who google for it.

Thanks.

Cheers,
Stefan