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Subject: RE: Synchronous signal delivery..
From: Keith Adamson <keith.adamson@attbi.com>
To: Giuliano Pochini <pochini@shiny.it>
Cc: Linus Torvalds <torvalds@transmeta.com>,
       Kernel Mailing List <linux-kernel@vger.kernel.org>
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References: <XFMail.20030214115507.pochini@shiny.it>
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Date: 14 Feb 2003 08:04:23 -0500
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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.

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