From owner-freebsd-questions  Tue Jul 27 20:24:26 1999
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From: John Birrell <jb@cimlogic.com.au>
Message-Id: <199907280330.NAA55212@cimlogic.com.au>
Subject: Re: uthread_init.c: 'Cannot get stdio flags' :-(
In-Reply-To: <199907280150.VAA07686@misha.cisco.com> from Mikhail Teterin at "Jul 27, 1999 09:50:32 pm"
To: mi@aldan.algebra.com
Date: Wed, 28 Jul 1999 13:30:56 +1000 (EST)
Cc: questions@freebsd.org, stable@freebsd.org, eischen@vigrid.com,
	jb@cimlogic.com.au
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Mikhail Teterin wrote:
> Under what circumstances could a panic:
> 
> 	Fatal error 'Cannot get stdio flags' at line ? in file
> 		/usr/src/lib/libc_r/uthread/uthread_init.c (errno = ?)
> 
> be triggered?
> 
> We are trying  to replace HylaFAX's ${PREFIX}/sbin/faxsend  with our own
> application, which is written with threads. The app works fine if called
> directly  -- from  command  line.  But it  dies  a  horrible death  when
> actually  invoked by  HylaFAX's  ${PREFIX}/sbin/faxq. Here  is a  rather
> short ktrace produced by replacing faxsend with a shell wrapper:

Looks like ${PREFIX}/sbin/faxq has closed file descriptor 0 (stdin).
It's legal to do that, so our thread initialisation will have to check
for EBADF and not fail in that case.

-- 
John Birrell - jb@cimlogic.com.au; jb@freebsd.org http://www.cimlogic.com.au/
CIMlogic Pty Ltd, GPO Box 117A, Melbourne Vic 3001, Australia +61 418 353 137


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