From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <oliver@first.in-berlin.de>
X-Original-To: caml-list@sympa.inria.fr
Delivered-To: caml-list@sympa.inria.fr
Received: from mail2-relais-roc.national.inria.fr (mail2-relais-roc.national.inria.fr [192.134.164.83])
	by sympa.inria.fr (Postfix) with ESMTPS id 7325D7EE80;
	Fri, 15 Mar 2013 15:17:36 +0100 (CET)
Received-SPF: None (mail2-smtp-roc.national.inria.fr: no sender
  authenticity information available from domain of
  oliver@first.in-berlin.de) identity=pra;
  client-ip=192.109.42.8;
  receiver=mail2-smtp-roc.national.inria.fr;
  envelope-from="oliver@first.in-berlin.de";
  x-sender="oliver@first.in-berlin.de";
  x-conformance=sidf_compatible
Received-SPF: None (mail2-smtp-roc.national.inria.fr: no sender
  authenticity information available from domain of
  oliver@first.in-berlin.de) identity=mailfrom;
  client-ip=192.109.42.8;
  receiver=mail2-smtp-roc.national.inria.fr;
  envelope-from="oliver@first.in-berlin.de";
  x-sender="oliver@first.in-berlin.de";
  x-conformance=sidf_compatible
Received-SPF: None (mail2-smtp-roc.national.inria.fr: no sender
  authenticity information available from domain of
  postmaster@einhorn.in-berlin.de) identity=helo;
  client-ip=192.109.42.8;
  receiver=mail2-smtp-roc.national.inria.fr;
  envelope-from="oliver@first.in-berlin.de";
  x-sender="postmaster@einhorn.in-berlin.de";
  x-conformance=sidf_compatible
X-IronPort-Anti-Spam-Filtered: true
X-IronPort-Anti-Spam-Result: AsEIAFssQ1HAbSoIiWdsb2JhbABDiDG3RoUbAwGBZRYOAQEBFRIUBCSCKgEBBSNWEAsJBQoCAgUhAgIPBRgxiCcEsB6SchWBDo0VXQeCLTJhA45EiBaBIJJu
X-IPAS-Result: AsEIAFssQ1HAbSoIiWdsb2JhbABDiDG3RoUbAwGBZRYOAQEBFRIUBCSCKgEBBSNWEAsJBQoCAgUhAgIPBRgxiCcEsB6SchWBDo0VXQeCLTJhA45EiBaBIJJu
X-IronPort-AV: E=Sophos;i="4.84,850,1355094000"; 
   d="scan'208";a="7807126"
Received: from einhorn.in-berlin.de ([192.109.42.8])
  by mail2-smtp-roc.national.inria.fr with ESMTP/TLS/DHE-RSA-AES256-SHA; 15 Mar 2013 15:17:36 +0100
X-Envelope-From: oliver@first.in-berlin.de
Received: from first (e178037077.adsl.alicedsl.de [85.178.37.77])
	(authenticated bits=0)
	by einhorn.in-berlin.de (8.13.6/8.13.6/Debian-1) with ESMTP id r2FEHZO8010520
	(version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT);
	Fri, 15 Mar 2013 15:17:35 +0100
Received: by first (Postfix, from userid 1000)
	id 4072615400E6; Fri, 15 Mar 2013 15:17:34 +0100 (CET)
Date: Fri, 15 Mar 2013 15:17:35 +0100
From: oliver <oliver@first.in-berlin.de>
To: Jeremie Dimino <jdimino@janestreet.com>
Cc: caml-list@inria.fr, ocsigen@inria.fr
Message-ID: <20130315141735.GA4697@siouxsie>
References: <CAMu2m2Lt8oty_2mEQq8H1oV0-1Rjrf10ai543me9YxB1Nb5xfg@mail.gmail.com>
 <CALScVY=c1M=HAqMeM7x4QrxDTZsn0rB=HcTsQYheYUOBSBFRUQ@mail.gmail.com>
 <CALScVYnt-m-dRR41rBPo5R3xDx-81tMwBFbM3q+5p4gRqsQC9w@mail.gmail.com>
 <CALScVYmU7zEXbgdS21gGrq8iFvgVs0FWieKipRE9WtOM+PxeEg@mail.gmail.com>
 <5142E780.7060806@hars.de>
 <CANhEzE5_OtOjxw5xAYd0S5pSwO906oXcXg=ZFu9+YnwGRLZ+Eg@mail.gmail.com>
 <20130315124345.GB3262@siouxsie>
 <CANhEzE56Sd1CphY=QWU-p0=PgJrQF_UwfdLB4kfwgr+d_q9agA@mail.gmail.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Disposition: inline
In-Reply-To: <CANhEzE56Sd1CphY=QWU-p0=PgJrQF_UwfdLB4kfwgr+d_q9agA@mail.gmail.com>
User-Agent: Mutt/1.5.20 (2009-06-14)
X-Scanned-By: MIMEDefang_at_IN-Berlin_e.V. on 192.109.42.8
Subject: Re: [Caml-list] BUG in unix.ml (was: strange errors when linking
 lwt.unix)

On Fri, Mar 15, 2013 at 01:24:10PM +0000, Jeremie Dimino wrote:
> BTW, here is an example that will work on all unix systems:
> 
>    # #load "unix.cma";;
>    # Sys.set_signal Sys.sigchld (Sys.Signal_handle ignore);;
>    - : unit = ()
>    # let ic = Unix.open_process_in "sleep 5";;
>    val ic : in_channel = <abstr>
>    # Unix.system "sleep 10";;
>    Exception: Unix.Unix_error (Unix.EINTR, "waitpid", "").
[...]

As far as I can see, Sys.signal uses signal(2),
which is the unreliable C-style/-semantics
signal handling function.

You need to use sigprocmask to have reliable
signals.

Why sigprocmask was working with empty list,
I'm explring now. This is a bit strange to me...

Ciao,
   Oliver