Error 5 Call Createfilemapping
Contents |
here for a quick overview of the site Help Center Detailed answers to any questions you might createfilemapping error 5 have Meta Discuss the workings and policies of this site About createfilemapping failed err 5 Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads msdn createfilemapping with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, mapviewoffile just like you, helping each other. Join them; it only takes a minute: Sign up C CreateFileMapping error 5 Access Denied ALWAYS up vote 1 down vote favorite I would like to ask for help with WINAPI function CreateFileMapping (), which returns constantly NULL. After GetLastError() I get 5 - "ERROR_ACCESS_DENIED 5 (0x5) Access is
Secreateglobalprivilege
denied". The file has been created after CreateFile with no problem, but following CreateFileMapping never has bee succesful. int MapDestFile(LPCWSTR fPath) { hDestFile = CreateFile( fPath, GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); if (hSourceFile == NULL) { printf("%d\n", GetLastError()); } hDestMapFile = CreateFileMapping( hDestFile, NULL, PAGE_READWRITE, 0, 10, NULL ); if (hDestMapFile == NULL) { // here always tell error number 5 printf("%d\n", GetLastError()); } lpMapAddressDestFile = MapViewOfFile( hDestMapFile, FILE_MAP_WRITE, 0, 0, 0); if (lpMapAddressDestFile == NULL) { printf("%d\n", GetLastError()); } return 1; } I would appreciate any suggestions. Thanks winapi share|improve this question edited Dec 7 '13 at 22:42 David Heffernan 429k27583950 asked Dec 7 '13 at 22:27 Jan Bezdek 1314 add a comment| 1 Answer 1 active oldest votes up vote 2 down vote accepted You need to create the file with GENERIC_WRITE | GENERIC_READ to match PAGE_READWRITE. That seems self-evident when you think about it. How can you have memory that you can read from backed by a file t
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss
Mapviewoffile Example
the workings and policies of this site About Us Learn more createfilemapping error_access_denied about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow openfilemapping Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping http://stackoverflow.com/questions/20447498/c-createfilemapping-error-5-access-denied-always each other. Join them; it only takes a minute: Sign up Why does MapViewOfFile fail with ERROR_ACCESS_DENIED? up vote 3 down vote favorite I came across this situation with WinAPI's MapViewOfFile function. An Internet search didn't turn up any apparent fixes, so I will share my problem and solution here. Consider the following snippet: const char *name = http://stackoverflow.com/questions/16027268/why-does-mapviewoffile-fail-with-error-access-denied "Global\\Object_Name"; unsigned long size = get_object_size(); HANDLE handle = CreateFileMapping(INVALID_HANDLE_VALUE, NULL, PAGE_READWRITE, 0, size, name); if (!handle || handle == INVALID_HANDLE_VALUE) exit(GetLastError()); bool created = GetLastError() == 0; void *block = MapViewOfFile( handle, FILE_MAP_ALL_ACCESS, 0, 0, size); if (block == NULL) exit(GetLastError()); In one particular case, CreateFileMapping was successfully returning a handle. GetLastError was returning ERROR_ALREADY_EXISTS, so created == false. Now, the call to MapViewOfFile, using the same size that I passed to CreateFileMapping, returns NULL and GetLastError returns 0x05: ERROR_ACCESS_DENIED. The process was running with administrator privileges. The MSDN documentation doesn't really mention any reason why this situation would occur. So why does CreateFileMapping succeed, but MapViewOfFile fail? c winapi shared-memory share|improve this question edited Apr 16 '13 at 1:38 asked Apr 16 '13 at 1:24 Anthony Arnold 7,69974483 add a comment| 2 Answers 2 active oldest votes up vote 5 down vote accepted I'm sure there are many reasons why ERROR_ACCESS_DENIED could occur from a call to MapViewOfFile. In my particular situation, it was due to the size argument. The
Studio 2015 products Visual Studio Team Services Visual Studio Code Visual Studio Dev Essentials Office Office https://msdn.microsoft.com/en-us/library/windows/desktop/aa366537(v=vs.85).aspx Word/Excel/PowerPoint Microsoft Graph Outlook OneDrive/Sharepoint Skype Services Store Cortana Bing Application Insights Languages & platforms Xamarin ASP.NET C++ TypeScript .NET - VB, C#, F# http://bugs.python.org/issue12562 Server Windows Server SQL Server BizTalk Server SharePoint Dynamics Programs & communities Students Startups Forums MSDN Subscriber downloads Sign in Search Microsoft Search Windows Dev error 5 Center Windows Dev Center Explore What’s new for Windows 10 Intro to Universal Windows Platform Coding challenges Develop for accessibility Build for enterprise Windows Store opportunities Docs Windows apps Get started Design and UI Develop API reference Publish Monetize Promote Games Get started UI design Develop Publish Desktop Get error 5 call started Design Develop API reference Test and deploy Compatibility Windows IoT Microsoft Edge Windows Holographic Downloads Samples Support Why Windows Dashboard Explore What’s new for Windows 10 Intro to Universal Windows Platform Coding challenges Develop for accessibility Build for enterprise Windows Store opportunities Docs Windows apps Get started Design and UI Develop API reference Publish Monetize Promote Games Get started UI design Develop Publish Desktop Get started Design Develop API reference Test and deploy Compatibility Windows IoT Microsoft Edge Windows Holographic Downloads Samples Support Why Windows Dashboard Memory Management Memory Management Reference Memory Management Functions Memory Management Functions CreateFileMapping CreateFileMapping CreateFileMapping AddSecureMemoryCacheCallback AllocateUserPhysicalPages AllocateUserPhysicalPagesNuma BadMemoryCallbackRoutine CopyMemory CreateEnclave CreateFileMapping CreateFileMappingFromApp CreateFileMappingNuma CreateMemoryResourceNotification DiscardVirtualMemory FillMemory FlushViewOfFile FreeUserPhysicalPages GetLargePageMinimum GetMemoryErrorHandlingCapabilities GetPhysicallyInstalledSystemMemory GetProcessDEPPolicy GetProcessHeap GetProcessHeaps GetSystemDEPPolicy GetSystemFileCacheSize GetWriteWatch GlobalAlloc GlobalDiscard GlobalFlags GlobalFree GlobalHandle GlobalLock GlobalMemoryStatus GlobalMemoryStatusEx GlobalReAlloc GlobalSize GlobalUnlock HeapAlloc HeapCompact HeapCreate HeapDestroy HeapFree HeapLock HeapQueryInformation HeapReAlloc HeapSetInformation He
User List Committer List Help Tracker Documentation Tracker Development Report Tracker Problem Issue12562 classification Title: calling mmap twice fails on Windows Type: behavior Stage: Components: Windows Versions: Python 3.2, Python 3.3, Python 2.7 process Status: closed Resolution: rejected Dependencies: Superseder: Assigned To: Nosy List: brian.curtin, pitrou, tim.golden, vladris, zolnie Priority: normal Keywords: Created on 2011-07-14 18:00 by zolnie, last changed 2011-08-01 14:42 by pitrou. This issue is now closed. Messages (6) msg140349 - (view) Author: Piotr Zolnierczuk (zolnie) Date: 2011-07-14 18:00 Hi, I am trying to migrate from Python 2.5 to Python 2.7 I found though the mmap behaves differently on Windows XP between the two versions. It boils down to the following code: import mmap map1 = mmap.mmap(fileno=0, tagname='MyData', length=4096) map2 = mmap.mmap(fileno=0, tagname='MyData', length=8192) It runs fine (so I can "resize" shared memory) on XP with 2.5.4, but when running on 2.7.2 I get the following error Traceback (most recent call last): File "D:\Workspace\memmap_test.py", line 3, in