I must be missing something.  

DisaptchInputInterrupt knows how to interrupt a running process, and because of 
Enrico's Python interruption stuff it will interrupt script execution at some 
point but it wasn't very reliable last time I tried it.  

But the whole point of this patch is that in general commands don't listen to 
that interrupt if they are just running in a loop doing work.  Sending the 
interrupt is not enough.

Jim



> On Sep 19, 2017, at 11:36 AM, Zachary Turner <ztur...@google.com> wrote:
> 
> 
> 
> On Tue, Sep 19, 2017 at 11:34 AM Jim Ingham <jing...@apple.com> wrote:
> 
> > On Sep 19, 2017, at 11:30 AM, Zachary Turner <ztur...@google.com> wrote:
> >
> >
> >
> > On Tue, Sep 19, 2017 at 11:27 AM Jim Ingham <jing...@apple.com> wrote:
> > We agreed to forwards compatibility because people write big scripts that 
> > use the SB API, implement GUI's on top of them (more than just Xcode) etc.  
> > So we try not to jerk those folks around.  That adds a little more 
> > responsibility on our part to think carefully about what we add, but the 
> > notion that we should refrain from making useful functionality available 
> > because we'd rather not be beholden to our decisions seems really 
> > wrong-headed to me.
> >
> > And in this case there's a clear use for this. For instance the xnu macros 
> > have a bunch of Python based commands that spew out pages and pages of 
> > output.  Those guys would love to make their commands interruptible.  To do 
> > that they would need to call WasInterrupted.  So this is 100% something 
> > that should be available at the SB API layer.
> >
> >
> > Couldn't it just return eCommandFinishedNoResult?  Or a new value, 
> > eCommandFinishedPartialResult?
> 
> I don't follow.  How would it know the user asked it to stop?
> 
> 
> The user already has a way to interrupt a command via DispatchInputInterrupt. 
>  If the command is then interrupted and output is lost as a result, the 
> private api returns the appropriate value, which the user can check for.

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