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From: Alex Pennace <alex@pennace.org>
To: Neil Brown <neilb@cse.unsw.edu.au>
Cc: Bernd Eckenfels <ecki@lina.inka.de>, linux-kernel@vger.kernel.org
Subject: Re: Desperately missing a working "pselect()" or similar...
Date: Fri, 5 Oct 2001 19:30:49 -0400	[thread overview]
Message-ID: <20011005193049.A6981@buick.pennace.org> (raw)
In-Reply-To: <3BBDD37D.56D7B359@isg.de> <E15pbid-0007fi-00@calista.inka.de> <20011005190523.A6516@buick.pennace.org> <15294.16536.430907.650513@notabene.cse.unsw.edu.au>
In-Reply-To: <15294.16536.430907.650513@notabene.cse.unsw.edu.au>

On Sat, Oct 06, 2001 at 09:21:38AM +1000, Neil Brown wrote:
> On Friday October 5, alex@pennace.org wrote:
> > The select system call doesn't return EINTR when the signal is caught
> > prior to entry into select.
> 
> A technique I used in a similar situation once went something like:
> 
> tv.tv_sec=bignum;
> tv.tv_usec = 0;
> enable_signals();
> select(nfds, &readfds,&writefds,0,&tv);
> 
> and have the signal handlers set tv.tv_sec to 0. (tv is a global
> variable).

I've thought about that, but I haven't been able to find any guarantee
that there will be no user space futzing around with &tv, like a
library wrapper that copies tv to another spot in memory and invokes
the syscall with that address.

  reply	other threads:[~2001-10-05 23:30 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-10-05 15:36 lkv
2001-10-05 16:19 ` Alexander Viro
2001-10-05 16:28   ` lkv
2001-10-05 16:36 ` Christopher Friesen
2001-10-05 16:40   ` lkv
2001-10-05 20:37 ` Bernd Eckenfels
2001-10-05 23:05   ` Alex Pennace
2001-10-05 23:13     ` Alan Cox
2001-10-05 23:52       ` Alex Pennace
2001-10-05 23:22     ` Neil Brown
2001-10-05 23:30       ` Alex Pennace [this message]
2001-10-05 23:43         ` David Schwartz
2001-10-06  0:03       ` Alan Cox
2001-10-08 16:32 lkv
2001-10-08 16:44 ` Alan Cox
2001-10-08 17:06   ` lkv
2001-10-08 17:24     ` Alan Cox
2001-10-09 13:37 ` Jan Hudec
2001-10-13 16:05   ` Jamie Lokier

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