Re: Strangeness with signals

Philippe Troin
2005-09-28T15:34:35Z

Simon Kirby <sim@netnation.com> 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.