Dear SCO Customer,

Support Level Supplement (SLS) ptf7656a, the UnixWare 7 grep Supplement, 
addresses the following issue:

        When the pattern file named in a "-f" option is actually a pipe,
        it is possible for the grep or egrep command to fail to read all
        of the specified patterns, that is, it might read some, all, or
        none of the data supplied via the pipe.  This may cause incorrect
        results to be produced.  No error message is generated.

        Two examples of problematical usages would be:

            $ echo $pat | genpat | grep -f /dev/fd/0 infile
            $ grep -f <(echo $pat | genpat) infile          # ksh only


Contents
-------- 

        /usr/bin/grep


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

SLS ptf7656a should only be installed on:
 
        UnixWare 7 Release 7.0.0, 7.0.1, 7.1.0, 7.1.1 


NOTE:  This supplement has been superseded by
the UnixWare 7.1.1 Maintenance Pack for UnixWare 7.1.1 platforms
only.  The UnixWare 7.1.1 Maintenance Pack is available from:

ftp://ftp.caldera.com/pub/unixware7/uw711pk

If your system is running any libraries or commands that are
contained in this SLS, then these programs will continue to run
with the old versions of these libraries or commands until the
the system is rebooted. 

Note that when all necessary patches have been installed, it is
recommended that you reboot the system at the earliest opportunity.
This will ensure that no programs continue to run with the old 
libraries or commands.


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

1. Download the ptf7656a.Z file to the /tmp directory on your
   machine.

2. As root, uncompress the file and add the package to your system
   using these commands:
 
        $ su 
        Password: <type your root password> 
        # uncompress /tmp/ptf7656a.Z 
        # pkgadd -d /tmp/ptf7656a
        # rm /tmp/ptf7656a 

Alternatively, this SLS package may be installed in quiet mode,
that is, without displaying the release notes and asking for
confirmation.  To do this, use these commands:

        $ su            
        Password: <type your root password>            
        # uncompress /tmp/ptf7656a.Z            
        # pkgadd -qd /tmp/ptf7656a all            
        # rm /tmp/ptf7656a 

3. There is no need to reboot the system after installing this SLS package.

The release notes displayed prior to installation can be found in:

        /var/sadm/pkg/ptf7656/install/ptf7656.txt 


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

1. As root, remove the SLS package using these commands: 

        $ su
        Password: <type your root password>
        # pkgrm ptf7656

2. There is no need to reboot the system after removing this SLS package. 

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