Re: A signal fairy tale

[Christopher Smith]

--On Wednesday, June 27, 2001 11:18:28 +0200 Jamie Lokier 
<[e-mail]> wrote:
> Btw, this functionality is already available using sigaction().  Just
> search for a signal whose handler is SIG_DFL.  If you then block that
> signal before changing, checking the result, and unblocking the signal,
> you can avoid race conditions too.  (This is what my programs do).

It's more than whether a signal is blocked or not, unfortunately. Lots of 
applications will invoke sigwaitinfo() on whatever the current signal mask 
is, which means you can't rely on sigaction to solve your problems. :-(

--Chris