DOCUMENT:Q185727 10-AUG-2001 [winnt] TITLE :BUG: closesocket() Fails with 10038 After _open_osfhandle() PRODUCT :Microsoft Windows NT PROD/VER:winnt:4.0,4.0 SP3 OPER/SYS: KEYWORDS:kbnetwork kbWinNT400sp4fix kbAPI kbSDKPlatform kbWinsock kbGrpDSNet ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server versions 4.0, 4.0 SP3 - Microsoft Windows NT Workstation versions 4.0, 4.0 SP3 - Microsoft Windows NT Server version 4.0, Terminal Server Edition ------------------------------------------------------------------------------- SYMPTOMS ======== The _open_osfhandle() function allocates a C run-time file handle and sets it to point to the operating-system file handle. When _open_osfhandle() function is used on a socket descriptor, both _close() and closesocket() should be called before exiting. However, on Windows NT 4.0 Service Pack 3, closesocket() after _close() returns 10038. RESOLUTION ========== To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, please see the following article in the Microsoft Knowledge Base: Q152734 How to Obtain the Latest Windows NT 4.0 Service Pack STATUS ====== Microsoft has confirmed this to be a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4. This bug is not present in Windows NT 4.0 Service Pack 1, Service Pack 2, or the original build of Windows NT 4.0. MORE INFORMATION ================ When _open_osfhandle is used on a socket descriptor, both _close() and closesocket() should be called before exiting. _close() only closes the file handle. closesocket() has to be called as well to close the socket descriptor and clean up the underlying socket object. Additional query words: ====================================================================== Keywords : kbnetwork kbWinNT400sp4fix kbAPI kbSDKPlatform kbWinsock kbGrpDSNet Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW400 kbWinNTW400search kbWinNT400search kbWinNTW400sp3 kbWinNTSsearch kbWinNTS400sp3 kbWinNTS400search kbWinNTS400 kbNTTermServ400 kbNTTermServSearch Version : winnt:4.0,4.0 SP3 Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.