DosSetSigHandler API Not Behaving as Expected in OS/2 Subsystem

• Microsoft Windows NT Workstation version 3.51
• Microsoft Windows NT Server version 3.51

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 ntnetserv kbbug3.51 kbfix3.51.sp5
Version : winnt:3.51
Platform : winnt
Issue type :