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Date: Thu, 13 Feb 2003 12:22:06 -0800 (PST)
From: Davide Libenzi <davidel@xmailserver.org>
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To: Linus Torvalds <torvalds@transmeta.com>
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Subject: Re: Synchronous signal delivery..
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On Thu, 13 Feb 2003, Linus Torvalds 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);
>
> which creates a file descriptor that is associated with the particular
> thread that created it, and the particular signal mask that the user was
> interested in. That file descriptor can be passed around all the normal
> ways: it can be dup()'ed, given to somebody else with a AF_UNIX socket,
> and obviously read() and select()/poll()'ed upon.

That's really nice, I like file-based interfaces. No plan to have a way to
change the sig-mask ? Close and reopen ?
What do you think about having timers through a file interface ?



> Any real use would also probably be a select() or poll() loop.

And sice it supports ->poll(), epoll.




- Davide

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