TECHNICAL INFORMATION DOCUMENT

TITLE:              PTF174 - Patch for Memory Leak in localtime()
DOCUMENT ID:        TID300122
DOCUMENT REVISION:  A
DATE:               25JAN95
ALERT STATUS:       Yellow
INFORMATION TYPE:   Symptom Solution
README FOR:         PTF174

PRODUCT and VERSION:
UnixWare 1.1

ABSTRACT:

The ptf174 file contains PTF174 - Patch for Memory leak in localtime(). 
This patch requires UnixWare Update 1.1.2 and the C Compilation 
System to be installed on the system.  The package will NOT install 
if any of the required components is not present.


SYMPTOM

Memory leak when calling localtime()

SOLUTION

Apply the ptf174 file.


Installation Instructions:

DATATYPE: datastream

1.  Download the ptf174 and ptf174.txt files to the /tmp directory 
    on your machine.

2.  Read the release notes contained in this file.            

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

     $ su
     # pkgadd -d /tmp/ptf174 ptf174

Solution Specifics

1. General Description

This patch corrects a memory leak in the localtime() routine.


2. New Features

None


3. Software Notes and Recommendations

This patch requires UnixWare Update 1.1.2 and the C Compilation 
System to be installed on the system.  The package will NOT install 
if any of the required components is not present.


4. Hardware Notes and Recommendations

None 


5. Installation Instructions

Depending on the format:

If this PTF was delivered on a diskette, then (as "root")

          pkgadd -d diskette1

should install this patch.

Otherwise, if you have a file such as "ptf174" which is in a "stream" format,
then (as "root")

          pkgadd -d <pwd>/ptf174 

will work.
     
After installing this patch, a system reboot will be needed.

6. Troubleshooting
     
Execute a program containing the below code fragment:

for ( ; ; ) {
     time_t date;

     date = time(NULL);
          (void)localtime(&date);
     }

Monitor the process size with ps -l.  Before applying this patch, 
the process size will continuously increase; after the patch is 
installed, the process size will increase to some maximum size 
and then remain constant.