TECHNICAL INFORMATION DOCUMENT

TITLE:              PTF261 - Connection Server Patch
DOCUMENT ID:        TID300209
DOCUMENT REVISION:  A
DATE:               05MAY95
ALERT STATUS:       Yellow
INFORMATION TYPE:   Symptom Solution
README FOR:         ptf261

PRODUCT and VERSION:
UnixWare 1.1

ABSTRACT:

The Connection Server opens a tty device before checking for an 
existing lock file.


SYMPTOM

A PPP connection hangs after an attempt is made to open the same tty device
via a cu command.

SOLUTION

Apply the ptf261 file.

Installation Instructions:  

DATATYPE: datastream

1.  Download the ptf261.Z and ptf261.txt files to the /tmp directory  
    on your machine.

2.  Read the release notes contained in this file and follow the
    instuctions to add the packages to your system.

3.  Now become root, uncompress the file and add the package to your 
    system using the following commands:

        $ su
        # uncompress /tmp/ptf261.Z
        # pkgadd -d /tmp/ptf261

Solution Specifics

Product And Version
--------------------

UnixWare 1.1.3, UnixWare 1.1.4.

Symptom
--------

A PPP connection hangs after an attempt is made to open the same tty 
device via a cu command.  The connection server was allowed to open 
this tty device again and the streams modules required by cu were pushed 
onto the stream head, thereby trashing the PPP connection.

General Description.
-------------------

Opening the same tty device multiple times causes an existing
connections to hang.  The connection server now checks to see if
a lock file exist before attempting to open the tty device.
If one exist, the attempted operation is aborted.


New Features.
------------

None.

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

This PTF can be installed on UnixWare 1.1.3 thru UnixWare 1.1.4
systems using com ports or port cards with modems that incur the
problem described under the "Symptom" section of these Release Notes.
It must be reinstalled following the subsequent update to UnixWare
Update 1.1.4 or after an overlay installation of UnixWare Update 1.1.3
or 1.1.4.

This PTF CANNOT be used on UnixWare 2.X systems.

NOTE: The configuration of modems using the Dialup_Setup icon under
the System_Setup folder creates the UUCP entry in /etc/uucp/Devices
using the software flow control tty device, tty[0-9][0-9]s.  The PPP
documentation recommends using the hardware flow control tty device,
tty[0-9][0-9]h.  If this configuration is used, the problem described
in the "Symptom" section will not occur.

Testing of the modified software contained in this package has been
conducted only to the extent necessary to confirm that it resolves the
problem(s) stated above ("Symptom").  Such testing consists of
recreating the problem conditions and verifying that the problem no 
longer occurs.  No other testing of this software has been done.

Hardware Notes and Recommendations.
----------------------------------

This PTF is targeted for the i386, i486 and Pentium CPU's,
and systems configured to use com ports or ports cards with modems.

If the Terminal Ready (TR) or Data Terminal Ready (DTR) is lit
on the modem and no other indicators are lit, a previous attempt
to establish a PPP connection failed.  Power sequence the modem,
turn off then on, and try establishing the PPP connection again.