2017-04-28 17:48 GMT+02:00 David T. Lewis <lewis at mail.msen.com>:

> > Hi Squeakers,
> >
> > Is there a way to quit/exit Squeak with a return code that can be tested
> > in a .so file?
> >
>
> I think I remember implementing this a long time ago in the Unix VM. I
> can't really look further right now but I'll check later and try to give a
> better answer.
>
> IIRC, primitiveQuit can take an optional argument that is passed back to
> the shell script that in turn gives you an exit code that you can test.
> This probably is working right now in the interpreter VM (sorry I can't
> check it at the moment). I'm not sure if it's in Cog/Spur, but if not it
> can be easily added.
>
> Dave
>
>
>
>
Answer is yes, if you browse the code on github,
https://raw.githubusercontent.com/OpenSmalltalk/opensmalltalk-vm/Cog/src/vm/cointerp.c
then you will see this:

 /* 113 */ primitiveQuit,

... snip...

	/* InterpreterPrimitives>>#primitiveQuit */
static void
primitiveQuit(void)
{   DECL_MAYBE_SQ_GLOBAL_STRUCT
	ioExitWithErrorCode((GIV(argumentCount) == 1
		? ((longAt(GIV(stackPointer))) >> 1)
		: 0));
}


So you can pass a SmallInteger to the primitive 113

Then to know what the platform will do with this error code, just query it
thru github web iface:

https://github.com/OpenSmalltalk/opensmalltalk-vm/search?utf8=%E2%9C%93&q=ioExitWithErrorCode&type=
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