What is libc version 8.0.2f, the UnixWare Runtime C Library for
UnixWare 7.1.4 MP4? 


Problems Fixed
-------------

  Fixed in libc, version 8.0.2f:

  1. Implement extended stdio APIs as "real" functions - needed by open-source
     autoconf configure tests

     To further aide the porting of open source software, some common extended
     <stdio.h> APIs have been added:

        void _flushlbf(void);
        size_t __fbufsiz(FILE *stream);
        size_t __fpending(FILE *stream);

        void __fpurge(FILE *stream);

        int __flbf(FILE *stream);
        int __freading(FILE *stream);
        int __fwriting(FILE *stream);
        
        int __freadable(FILE *stream);
        int __fwritable(FILE *stream);

     fz535604

  2. vi -x file results in SIGSEGV - previous libc.so.1 fix for potential
     deadlock incomplete

     A previous libc.so.1 fix for a potential deadlock in applications calling
     putenv() or setenv() failed to consider applications implementing their
     own malloc(), free(), et al  functions.  The fix now handles all
     such situations.
     fz535673

  3. C runtime (/usr/lib/libc.so.1) in MP4 breaks Skunkware version of gzip (1.2.4)

     Repairs made to the runtime linker (RTLD) in OpenServer 6.0.0 MP3
     for issues encountered in the porting of OpenOffice 2.0.x (see
     OSR6 MP4 Release Notes - bug id 534211:1) and carried forward in
     the UnixWare 7.1.4 MP4 patch, caused the fini routines of
     an a.out to be executed twice.  This is typically not a problem
     since sensitive code such as the destruction of global or static C++ 
     objects is prevented from being executed more than once by both
     the native compilation system or the GNU compiler in the OSTools package.

     The fini routines of applications built with a version of the GNU 
     compiler(s) prior to version 2.95, however, would call abort() if
     executed a second time.  Such is the situation with the Skunkware 
     gzip-1.2.4 for UnixWare 7, published in early 1999.  

     The SVR5 /usr/libc/libc.so.1 RTLD code has been fixed to avert any
     re-execution of an application's fini code. Applications built with 
     an old version of GCC will continue to run on UW 7.1.4.

     fz535712


Contents
--------

  /usr/lib/libc.so.1


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

  The libc, version 8.0.2f, update may be installed on all
  UnixWare 7.1.4 systems.  

  It is strongly recommended that the latest Maintenance Pack MP
  for each release be installed prior to installing this C
  runtime update.


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

  1. Download the libc.8.0.2f.image file to the /tmp directory on your machine.

  2. As root, add the package to your system using these commands:

     $ su -
     Password: <type your root password>
     # pkgadd -d /tmp/libc.8.0.2f.image all

     Alternatively, this 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>
     # pkgadd -qd /tmp/libc.8.0.2f.image all

  3. It is not necessary to reboot the system after installing this
     package.  Any currently running application using the previous
     C runtime will continue to do so until the application terminates
     or the system is rebooted.


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

  The "pkgrm" command cannot be used to remove this mandatory system
  runtime library.  To revert to the previous version of libc installed 
  on your system:

  1. As root, execute the special removal script provided with
     this version of libc.

     $ su -
     Password: <type your root password>
     # sh /var/sadm/pkg/libc/install/previous

  2. Reboot the system after reverting to a previous version of the 
     C runtime.

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


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