Date: Wed, 2 Dec 2009 15:17:53 +0100
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: 1.7.0-67: syslog() not working properly - possible bug in    writev()  ?
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On Dec  2 12:07, Christian Franke wrote:
> Corinna Vinschen wrote:
> > On Dec  2 10:31, Christian Franke wrote:
> > > I presume that the root of the problem is that the
> > > 
> > > writev(fd, { {"< PRI >", . }, { "MSG", . } }, 2) 
> > > used within syslog() sends "< PRI >" and "MSG" in
> > > two separate datagrams to /dev/log.
> > > 
> > 
> > Probably not.  The "kernel:" message is generated if something is
> > available on /dev/kmsg, which shouldn't be the case.  The only message
> > type generated there are exceptions catched by Cygwin.  I'll have a
> > look into it.  Thanks for the report.
> > 
> > 
> 
> Another test:
> 
> This sends one UDP package on 1.5, but two on 1.7:
> 
>      int sd = socket(AF_LOCAL, SOCK_DGRAM, 0);
> 
>      struct sockaddr_un sa; sa.sun_family = AF_LOCAL;
>      strcpy(sa.sun_path, "/dev/log");
>      connect(sd, (struct sockaddr *)&sa, sizeof(sa));
> 
>      struct iovec iv[2] = { { "<1>", 3 }, { "test: text", 10 } };
>      writev(sd, iv, 2);

Yes, but... why is that a problem for syslog-ng?  Shouldn't it have
to expect that a message comes in multiple UDP packages?  Hmm.


Corinna

-- 
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Project Co-Leader          cygwin AT cygwin DOT com
Red Hat

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