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Q154963: DosSetSigHandler API Not Behaving as Expected in OS/2 Subsystem

Article: Q154963
Product(s): Microsoft Windows NT
Version(s): 3.51
Operating System(s): 
Keyword(s): kbnetwork
Last Modified: 13-FEB-2002

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The information in this article applies to:

- Microsoft Windows NT Workstation version 3.51 
- Microsoft Windows NT Server version 3.51 
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SYMPTOMS
========

The DosSetSigHandler API does not behave as it should in the Windows NT OS/2
SubSystem when called with a NULL Handler and SIGA_IGNORE, as in the following
example:

  DosSetSigHandler(NULL,..,SIGA_IGNORE)

CAUSE
=====

In the OS/2 Subsystem a macro was generating an incorrect address in the case
where a null handler value was passed in as a parameter.

RESOLUTION
==========

Apply the fix mentioned below. The solution was to recognize the null value and
flag the IGNORE parameter. This is the expected behavior for DosSetSigHandler
handling in this case.


STATUS
======

This problem was corrected in the latest Windows NT 3.51 U.S. Service Pack. For
information on obtaining the Service Pack, query on the following word in the
Microsoft Knowledge Base (without the spaces):

  S E R V P A C K


Additional query words: prodnt OS2

======================================================================
Keywords          : kbnetwork 
Technology        : kbWinNTsearch kbWinNTWsearch kbWinNT351search kbWinNTW351search kbWinNTW351 kbWinNTSsearch kbWinNTS351 kbWinNTS351search
Version           : :3.51

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