Patch Name:  PHKL_1817

Patch Description: Fixes NFS data loss.

This patch fixes a problem where some writes to an NFS file can be lost if
another process is stat(2)'ing the file.  The process writing the file has
to be also doing a lseek(2) to the end of the file between writes.  This
combination is likely to cause the problem.  It is also possible that multiple
processes stat()'ing the file while one is writing it could cause the problem.

Path Name:  /hp-ux_patches/s700/8.X/PHKL_1817

Effective Date:  921210

Patch Files:  /system/PHKL_1817/new/conf/nfs_vnops.o

SR/APR#:  5000-685800

"what" string/timestamp:  
nfs_vnops.o:
         PATCH_8.05: nfs_vnops.c 1.14.43.8    92/12/10 PHKL_1817

"sum" output:  
46150 48 nfs_vnops.o

Dependencies:  none.

Supersedes: none.

Patch Package Size:  52 Kbytes

Installation Instructions:  

     Please review all instructions and the Hewlett-Packard
     SupportLine User Guide or your Hewlett-Packard support terms
     and conditions for precautions, scope of license,
     restrictions, and, limitation of liability and warranties,
     before installing this patch.

     Note: Please back up your system before you patch.

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After getting the patch onto your machine, unshar the patch (sh PHKL_1817).

To install this patch do the following:
1) Run /etc/update (Note: you must be logged in as root to update
   a system).
2) Once in the update "Main Menu" move the highlighted line to "Change
   Source or Destination ->" and press "Return" or "Select Item".
3) Make sure the highlighted item in the "Change Source or Destination"
   window is "From Tape Device to Local System ...", then press "Return" or
   "Select Item".
4) You should now be in the "From Tape Device to Local System" window.
   Change the "Source:  /dev/rmt/0m" to "Source: /tmp/PHKL_1817.updt"
   (this assumes that you are in the /tmp directory where PHKL_1817.updt
   has been placed).  Note: You must enter the complete path name.
5) Press "Done".
6) From here on follow the standard directions for update.

The customized script that update runs will move the original software
to /system/PHKL_1817/orig.  HP recommends keeping this software there in
order to recover from any potential problems.  It is also recommended that
you move the PHKL_1817.text file to /system/PHKL_1817 to be retained for
future reference.

If you wish to put this patch on a magnetic tape and update from the tape
drive, dd a copy of the patch to the tape drive.  As an example the
following will create a copy of the patch that update can read:
dd if=PHKL_1817.updt of=/dev/rmt/0m bs=2048