kern/68690: write(2) returns wrong vlalue when EFAULT

[KOIE Hidetaka (鯉江英隆＠数理技研)]

Thanks for your inspection.

  Message-Id: <20040707172014.C3185 at gamplex.bde.org>
  Date:       Wed, 7 Jul 2004 18:23:57 +1000 (EST)
  From:       Bruce Evans <bde at zeta.org.au>
  Subject:    Re: kern/68690: write(2) returns wrong vlalue when EFAUL..

  | Do you actually see the file pointer advanced?  This may be file system
  | dependent.  ffs is supposed to back out of the write, and it does so
  | for me.  Output:
  | 
  | %%%
  | pos=0
  | write(20480)->-1 (should be 12288)
  | write: Bad address
  | pos=0 (should be 12288)
  | %%%

I was unaware of examining on NFS.
%%%
pos=0
write(20480)->-1 (should be 12288)
write: Bad address
pos=8192 (should be 12288)
%%%

The file pointer is not backed.


  | > >Fix:

I understand some problems exist.

--
KOIE Hidetaka / koie at suri.co.jp / SURIGIKEN Co.,LTD.