Re: WINDOWS32 "Signal 127" due to a path in quotes bug

[Eli Zaretskii]

> Date: Mon, 1 Aug 2005 22:37:57 -0400
> Cc: Eli Zaretskii <address@hidden>, address@hidden
> From: "Paul D. Smith" <address@hidden>
> 
> %% "J. Grant" <address@hidden> writes:
> 
>   jg> Ok. thank you for explaining. So is the reason the two main.exe do
>   jg> not terminate because my main.c program does not handle SIGINT?
> 
> I was assuming they don't terminate because the operating system
> (Windows) is sending the SIGINT to only the "main" program (in this case
> make), and not sending it to all the processes that make invokes.  In
> other words, Windows doesn't have the concept of a process group or, at
> least, it doesn't work the same way.

Windows _does_ have the notion of process groups; what it doesn't have
is the concept of signals.  Signals are emulated on Windows.

So the issue here is how are the emulated signals delivered to several
programs that run concurrently.  I'm guessing that SIGINT is delivered
only to the program that Windows considers to be currently in the
foreground, but not to the others.

My hope is that the exit status of the interrupted program somehow
tells that it was interrupted.  If so, we could propagate that
knowledge back into Make, and handle it correctly.

But I need time to investigate all this, and that won't happen until
the next weekend.