From: ludo@gnu.org (Ludovic Courtès)
To: 30368@debbugs.gnu.org
Subject: bug#30368: ‘select’ returns non-empty sets upon EINTR or EAGAIN
Date: Wed, 07 Feb 2018 14:33:58 +0100 [thread overview]
Message-ID: <87y3k4zzy1.fsf@gnu.org> (raw)
In-Reply-To: <87y3k67671.fsf@gnu.org> ("Ludovic \=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\= \=\?utf-8\?Q\?s\?\= message of "Tue, 06 Feb 2018 11:39:30 +0100")
ludo@gnu.org (Ludovic Courtès) skribis:
> On 2.2.3, it prints:
>
> $ guile select.scm
>
>
> ;;; (signal! (2))
> ;;; (reading-from #<input: file /dev/pts/9>)
>
>>From there on it’s stuck in a read(0, …) call.
>
> The attached patch fixes it by clearing the returned FD sets on
> EINTR/EAGAIN.
There’s a case where we can get a “fake” EINTR that doesn’t come from
the underlying select(2) call: when the ‘scm_i_prepare_to_wait_on_fd’
call in ‘scm_std_select’ returns 1, which happens when new asyncs have
been queued.
Ludo’.
next prev parent reply other threads:[~2018-02-07 13:33 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-06 10:39 bug#30368: ‘select’ returns non-empty sets upon EINTR or EAGAIN Ludovic Courtès
2018-02-07 13:33 ` Ludovic Courtès [this message]
2018-02-16 14:33 ` Ludovic Courtès
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