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Date: Tue, 5 Aug 2014 18:48:42 +0200
From: Corinna Vinschen <corinna-cygwin@cygwin.com>
To: cygwin@cygwin.com
Subject: Re: syslog function: Bad file descriptor
Message-ID: <20140805164842.GA13601@calimero.vinschen.de>
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References: <53E10628.3C42FD6F@boland.nl>
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Hi Daniel,

On Aug  5 18:28, D. Boland wrote:
> Hi group,
>=20
> I'm still working on getting Sendmail working for Cygwin. I'm almost done=
, the devil
> is in the details...
>=20
> I'm getting the 'Bad file descriptor' system error after building the mai=
l aliases
> database. The building itself is done successful, but logging the event t=
o the
> system log fails with this message.
>=20
> Somehow the two are connected. The alias database (aliases.db) is built f=
rom a plain
> text file (aliases). If I leave the aliases file writable to the sendmail=
 user, I
> find that the error message strings have been put right into the alias te=
xt-file:
>=20
> $ cat /etc/mail/aliases
> <21>sendmail: PID 1848: alias database /etc/mail/aliases rebuilt by smmsp=
senet: root
> news: root
> webmaster: root
> www: root
> ftp: root
> abuse: root
> noc: root
> security: root
> root: SYSTEM
> <22>sendmail: PID 1848: /etc/mail/aliases: 9 aliases, longest 6 bytes, 82=
 bytes
> total
>=20
> If I make the 'aliases' file read-only, then the file is not corrupted, b=
ut the
> error occurs.

I don't see that this has to do with syslog.  There's a writev to fd 3,
but you stripped the strace so we don't know what fd 3 is connected to.
Also, syslog writes the output to the Windows event log by default,
unless you have a syslog daemon running, connected to /dev/log.

So I guess we first have to know what fd 3 is connected to, and then
how to reproduce the issue.


Corinna

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