Windows Diary

It Is Necessary To Get Rid Of The Global Problems Of Denial Of Access To The Error Of Creating A Mutex.

Posted on by Brian Magallanes

Hope this guide will help you when you run into createmutex error which means access denied globally.

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    Today I have a theme similar to the previous one, but with exciting new sessions.It is called a mutex and has an integer prefix Global.When an application created a mutex with a foreign name no, other applications with different owner accounts could not synchronize with our mutex.The CreateMutex control always returned ERROR_ACCESS_DENIED. The OpenMutex succeeded, but the mutex cannot be used for synchronization.

    The solution is that all applications need a global mutex to access them using CreateMutexEx (only with SYNCHRONIZE request). Everything and everyone in the world must provide security paraphernalia. By default, security attributes cannot be shared between user accounts.

    createmutex error access denied global

    HANDLE hMutex;    DWORD dwRes, dwLayout;    PEveryoneSID psid = NULL;    PACL pACL=NULL;    PSECURITY_DESCRIPTOR pSD=NULL;    EXPLICIT_ACCESS ea[1];    SID_IDENTIFIER_AUTHORITY SIDauthWorld =            SECURITY_WORLD_SID_AUTHORITY;    SECURITY_ATTRIBUTES sa;    LONG RESERVE;    // Create a group for the sid you know.    if(!AllocateAndInitializeSid(&SIDAuthWorld, 1,                     SECURITY_WORLD_RID,                     0, 8, 0, 0, 0, 0, 0,                     &pEachSID))_tprintf(_T("Error AllocateAndInitializeSid %un"), GetLastError());        go clean up;        // Initialize the EXPLICIT_ACCESS structure for as an ACE.    // ace Allow anyone to read the key.    ZeroMemory(&ea, # 1 Sizeof(EXPLICIT_ACCESS)); * ea[0].= SYNCHRONIZE; grfaccesspermissions ea[0].grfAccessMode matches Set_access; in Ea[0].NO_INHERITANCE; grfinheritance=ea[0].Trustee.TrusteeForm TRUSTEE_IS_SID; = ea[0].Trustee.TrusteeType TRUSTEE_IS_WELL_KNOWN_GROUP; = ea[0].Trustee.ptstrName = (LPTSTR)pEveryoneSID;       // Create a new ACL containing certain new ACE entries.    dwRes = SetEntriesInAcl(1, NULL, ea, &pACL);    in the event (ERROR_SUCCESS != dwRes)           _tprintf(_T("Error SetEntriesInAcl %un"), GetLastError());        Go to cleaning;        // Initialize the security descriptor.    = pSD(PSECURITY_DESCRIPTOR)LocalAlloc(LPTR,                             SECURITY_DESCRIPTOR_MIN_LENGTH);    if you think about it (NULL == pSD)             _tprintf(_T("Error LocalAlloc %un"), GetLastError());        Go to cleaning;          if (!InitializeSecurityDescriptor(pSD,            SECURITY_DESCRIPTOR_REVISION))              _tprintf(_T("Error initializing security descriptor %un"),                                GetLastError());        Go to cleaning;          // Add an ACL to any security descriptor.    just in case (!SetSecurityDescriptorDacl(pSD,            TRUE, // output bDaclPresent            PAKL,            FALSE)) // no default DACLhope              _tprintf(_T("SetSecurityDescriptorDacl %un failed"),                GetLastError());        Go to cleaning;         Initialize // a security function with a structure.    sa.nLength is equal to sizeof(SECURITY_ATTRIBUTES);    sa.equals lpsecuritydescriptor PSD;    sa.bInheritHandle = FALSE;    hMutex = CreateMutexExW(&sa, L"GlobalMyNamedMutex", 3, SYNCHRONIZE);Clean:    if(pEveryoneSID)       FreeSid(pEveryoneSID);     if (pAdminSID)       FreeSid(pAdminSID);     if(pACL)        Local free (pACL);    if (psd)        LocalFree(PSD);// Do something with hMutexWaitForSingleObject(hMutex, INFINITE);CloseHandle(hMutex);
    

    
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