2017-04-28 17:48 GMT+02:00 David T. Lewis <lewis@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=