From: Doug McNaught <doug@wireboard.com>
To: Daniel Podlejski <underley@underley.eu.org>
Cc: Linux Kernel List <linux-kernel@vger.kernel.org>
Subject: Re: Incorect signal handling ?
Date: 12 Apr 2001 17:56:37 -0400 [thread overview]
Message-ID: <m3r8yxrdd6.fsf@belphigor.mcnaught.org> (raw)
In-Reply-To: <20010412223128.A11625@witch.underley.eu.org>
In-Reply-To: Daniel Podlejski's message of "Thu, 12 Apr 2001 22:31:28 +0200"
Daniel Podlejski <underley@underley.eu.org> writes:
> Hi,
>
> there is litlle programm:
>
> signal (SIGALRM, empty);
> alarm (1);
>
> a = read(fd, buf, 511);
>
> while (a && a != -1) a = read(fd, buf, 511);
> I open /tmp/nic and run compiled program.
> There should be error EINTR in read, but isn't.
"Fast" system calls (eg reads from disk) are generally
uninterruptible; thus the signal will be deferred until the read()
returns.
-Doug
prev parent reply other threads:[~2001-04-12 21:58 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-12 20:31 Daniel Podlejski
2001-04-12 21:27 ` Richard B. Johnson
2001-04-12 21:56 ` Doug McNaught [this message]
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