From: Paolo Bonzini <bonzini@gnu.org>
To: Joachim Schmitz <jojo@schmitz-digital.de>
Cc: bug-gnulib@gnu.org, git@vger.kernel.org,
'Junio C Hamano' <gitster@pobox.com>,
'Erik Faye-Lund' <kusmabite@gmail.com>
Subject: Re: poll() emulation in git
Date: Wed, 05 Sep 2012 14:05:21 +0200 [thread overview]
Message-ID: <50474001.5030407@gnu.org> (raw)
In-Reply-To: <00c001cd8b59$028e41c0$07aac540$@schmitz-digital.de>
Il 05/09/2012 13:24, Joachim Schmitz ha scritto:
> However: this poll implementation, while compiling OK, doesn't work properly.
> Because it uses recv(...,MSG_PEEK), it works on sockets only (returns ENOTSOCK on anything else), while the real poll() works on all
> kind if file descriptors, at least that is my understanding.
Actually recv(...,MSG_PEEK) on most Unix variants works on non-sockets
too. The trick is taken from GNU Pth in turn.
> Here on HP NonStop, when being connected via an non-interactive SSH, we get a set of pipes (stdin, stdout, stderr) instead of a
> socket to talk to, so the poll() just hangs/loops.
Does your system have a working FIONREAD ioctl for pipes?
> As git's implementation is based on ('stolen' from?) gnulib's and still pretty similar, CC to the gnulib list and Paolo
>
> Any idea how this could get solved? I.e. how to implement a poll() that works on non-sockets too?
> There is some code that pertains to a seemingly similar problem in Mac OS X, but my problem is not identical, as that fix doesn't
> help.
Paolo
next prev parent reply other threads:[~2012-09-05 12:05 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-05 11:24 poll() emulation in git Joachim Schmitz
2012-09-05 11:55 ` Bastien ROUCARIES
2012-09-05 12:04 ` Joachim Schmitz
2012-09-05 12:05 ` Paolo Bonzini [this message]
2012-09-05 12:57 ` Joachim Schmitz
2012-09-05 13:36 ` Joachim Schmitz
2012-09-05 15:25 ` Paolo Bonzini
2012-09-06 14:02 ` Joachim Schmitz
2012-09-06 14:31 ` Paolo Bonzini
2012-09-06 14:44 ` Joachim Schmitz
2012-09-06 15:15 ` Paolo Bonzini
2012-09-07 7:23 ` Joachim Schmitz
2012-09-07 7:39 ` Joachim Schmitz
2012-09-07 9:40 ` Paolo Bonzini
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