Dear SCO Customer,

The enclosed Support Level Supplement (SLS) PTF3107, the Single UNIX
Specification Supplement, corrects the following:

(A) Problems with ksh93 which produced behavior that failed to comply with 
    the UNIX 95 requirements:

    1. An alias that is set in a subshell was errantly propagated to the 
       parent shell. After the termination of the subshell, the alias 
       should not exist.

    2. A newly spawned background process may have ignored a SIGTERM signal
       depending on the timing of the arrival of the signal. This problem 
       caused the X/OPEN VSC bg-17 test to fail.

(B) Problems with inet, tcp and udp networking drivers which produced XTI
    option management behavior that did not conform to X/Open Networking
    Services Release 4. Unknown options should be passed back upstream with 
    a status of T_NOTSUPPORT.

(C) Problems with a libsocket library utility which caused an infinite loop
    when a zero-length buffer was passed into the routine. As a result, X/OPEN
    VSU tests were failing.



Software Notes and Recommendations
----------------------------------

PTF3107 should only be installed on SCO UnixWare Application Server Release
2.1.1 or SCO UnixWare Personal Edition Release 2.1.1.


Installation Instructions
-------------------------

1. Become root and create a new directory by typing the following:
 
     $ su
     Password: <type your root password>
     # mkdir /tmp/pkg
     # chmod 700 /tmp/pkg
     # cd /tmp/pkg

2. Download the ptf3107.Z and the ptf3107.txt files to the newly
   created /tmp/pkg directory on your machine.
 
3. Read the Release Notes contained in the ptf3107.txt file.
 
4. Uncompress the file and add the package to your system using these
   commands:
 
     # uncompress /tmp/pkg/ptf3107.Z
     # pkgadd -d /tmp/pkg/ptf3107 

5. Reboot your system after installing this SLS.


Removal Instructions
---------------------

1. Become root and remove the package by typing these commands:

    $ su
    Password: <type your root password>
    # pkgrm ptf3107

2. Reboot your system after removing this SLS.


If you have questions regarding this SLS, or the product on which it is
installed, please contact your software supplier.

We appreciate your business.

SCO Support Service