DragonFly BSD
DragonFly bugs List (threaded) for 2006-06
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Re: Unexpected soft update inconsistency

From: joerg@xxxxxxxxxxxxxxxxx
Date: Mon, 12 Jun 2006 01:19:52 +0200
Mail-followup-to: bugs@crater.dragonflybsd.org

On Sun, Jun 11, 2006 at 04:11:58PM -0700, Matthew Dillon wrote:
> :
> :On Sun, Jun 11, 2006 at 02:03:32PM -0700, Matthew Dillon wrote:
> :>     Well, looking at the 'gmake' source, there are a couple of places
> :>     where it can generate 'write error', primarily when it is closing
> :>     stdout.
> :
> :That's exactly were it is bailing out. The problem comes from earlier
> :write failures when a program set non-blocking operation on the stdout
> :descriptor. I have an initial patch for that, but Rumko reported
> :segfaults from it, which I haven't had time to investigate yet.
> :
> :Joerg
>     Non-blocking?  Why would the stdout descriptor be set to non-blocking?
>     Is gmake doing that or is it the program fork/exec'ing gmake ?

libc_r is doing that. E.g. gmake calls a threaded program, the program
sets non-blocking mode and gmake tries to write something to stdout when
it is blocking. This results in the error bit getting set and the error
2 to occur during cleanup.


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