Re: Strangeness with signals

[Philippe Troin]

Simon Kirby <sim@xxxxxxxxxxxxx> writes:

> On Tue, Sep 27, 2005 at 06:19:24PM -0700, Philippe Troin wrote:
> 
> > The SIGWINCH and SIGCHLD signals are not generated if their
> > disposition is set to SIG_DFL.  I believe SIGCONT and SIGURG also
> > behave similarly.  If you want to see them from your application, you
> > have to establish a (potentially empty) signal handler.
> 
> Ok, and this is what I did in the example; however, is it expected that
> it does not help to set a handler in sa_handler and call sigaction()?
> In fact, it does not matter what sa_handler is set to (it can still be
> SIG_IGN), but sa_sigaction must point to a valid handler.

As long as sa_handler (or sa_sigaction) is not SIG_DFL (which is NULL
on linux).

Phil.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/