RE: Synchronous signal delivery..

[Keith Adamson]

On Fri, 2003-02-14 at 05:55, Giuliano Pochini wrote:
> 
> > It's a generic "synchronous signal delivery" method, and it uses a
> > perfectly regular file descriptor to deliver an arbitrary set of signals
> > that are pending.
> >
> > It adds one new system call:
> >
> >       fd = sigfd(sigset_t * mask, unsigned long flags);
> 
> IMHO it's not simply a signal delivery system, it's a message queue. It's
> possible to deliver any kind of data to the process, and the fd can be
> used to send data to other processes as well.
> 

IMHO I agree, it would be real nice to be able to expose signals to 
other processes using a socket type of interface.  Even the kernel 
could expose certain internal signals to user space programs such 
as VM pressure.