Path: utzoo!utgpu!watserv1!watmath!att!tut.cis.ohio-state.edu!zaphod.mps.ohio-state.edu!samsung!munnari.oz.au!djh
From: djh@cs.mu.oz.au (David Hornsby)
Newsgroups: comp.protocols.appletalk
Subject: Re: CAP/AUFS bug & patch
Message-ID: <6287@munnari.oz.au>
Date: 16 Dec 90 15:18:35 GMT
References: <6242@munnari.oz.au>
Organization: Comp Sci, Melbourne Uni, Australia
Lines: 28

Fix one bug and another shows up :-(

Priority: medium/high
Affects: CAP5.0 and derivatives.

Symptom: Existing files 'created' with FPCreateFile (hard create flag)
were not being truncated to zero length before writing. This only became
obvious after the previous FPCreatFile bug fix was applied.

Fix: add truncate flag to the open() in applications/aufs/afpos.c in the
routines unix_create() and unix_createo(). There are TWO lines of the form

  flg = (delf) ? O_CREAT : O_CREAT | O_EXCL;
  
which become ...

  flg = (delf) ? O_CREAT | O_TRUNC : O_CREAT | O_EXCL;
  
Thanks to Ed Moy for pointing out this behaviour. If you are running on a
host that doesn't understand O_TRUNC, please email me and I will make a
more portable fix for this problem.

 - David.

David Hornsby						...!uunet!munnari!djh
Professional Officer					djh@munnari.OZ.AU
Department of Computer Science "The home of Multigate"	+61 3 344 4044
The University of Melbourne, Parkville, 3052, Victoria, Australia.