Synchrolock MutexLock

The Mutex Lock component

#define _WIN32_WINNT 0x0500 #include <windows.h> #include <sddl.h> #include <tchar.h> #include <stdio.h> /* All Variables are here! */ FILE *mutexFile; // Read from file FILE *logFile; // Log File SynchroLock.log FILE *heartbeat; // File to output process heartbeat CHAR stringMutex[256]; // !Prone to Overflow! INT countMutex; // Number of Mutexes HANDLE hMutex[1024]; // Handle of Mutexes CHAR *removeNewLine; // Removes NewLine Char at end of gets() INT createPass; SYSTEMTIME HeartBeatTime; // For LocalTime information for logging heartbeat. BOOL LogExists=FALSE; SECURITY_ATTRIBUTES MutexAttributes; // Global var used by RegisterMyMutex functn // Function RegisterMyMutex registers each Mutex as a globally accessible unit per computer int RegisterMyMutex(CHAR *currentMutex[]) { HANDLE registerMutex; registerMutex = CreateMutex(&MutexAttributes, FALSE, currentMutex); if (GetLastError()==ERROR_ALREADY_EXISTS) return -1; if (registerMutex == NULL) return 0; return 1; } // End Of Function RegisterMyMutex // Entry Point void main() { const TCHAR * szSD = _T("D:") // Discretionary // _T("(A;OICI;GRGWGX;;;AU)"); // Allow RWX to Authenticated Users _T("(A;OICI;GA;;;AU)"); // Allow Generic Access to all authenticated users // Initialise Mutex Security Attributes to run as Service ZeroMemory( &MutexAttributes, sizeof(MutexAttributes) ); MutexAttributes.nLength = sizeof( MutexAttributes ); // Set SecurityAttrib structures MutexAttributes.bInheritHandle = FALSE; if (!ConvertStringSecurityDescriptorToSecurityDescriptor(szSD, SDDL_REVISION_1, &MutexAttributes.lpSecurityDescriptor, NULL)) printf("Failed to ConvertStringSecurityDescriptorToSecurityDescriptor\n"); //SetSecurityDescriptorDacl( &MutexAttributes, TRUE, pDacl, FALSE ); // SecurityDescriptor is now prepared countMutex = 0; // Initialise counter mutex loaded mutexFile = fopen("c:\\SynchroLock\\Mutex.list","r"); logFile = fopen("c:\\SynchroLock\\SynchroLock.log","a+"); if (mutexFile==NULL) { MessageBox(0,"Cannot Open Mutex File","Cannot Read", MB_OK); ExitProcess(0); } if (logFile==NULL){ MessageBox(0,"No results will be written.","Error: Cannot open LogFile", MB_OK); // TO DO - FILE already created and running, QUIT! fclose(mutexFile); ExitProcess(0); } else LogExists=TRUE; // Load All Mutexes in Mutex.List file // Maximum Mutex length = 256 chars GetLocalTime(&HeartBeatTime); fprintf(logFile, "\n+Log file appended on %02d/%02d/%d %02d:%02d:%02d by MutexLock.\n", HeartBeatTime.wDay, HeartBeatTime.wMonth, HeartBeatTime.wYear, HeartBeatTime.wHour, HeartBeatTime.wMinute, HeartBeatTime.wSecond); while(fgets(stringMutex, 256, mutexFile)!=NULL) { if ((removeNewLine=strchr(stringMutex,'\n'))!=NULL) *removeNewLine='\0'; // Remove NewLine char from eos, replace with NULL countMutex++; // printf("%d %s",countMutex, stringMutex); // debug // MessageBox(0,stringMutex,"Registering", MB_OK); createPass = RegisterMyMutex(stringMutex); if(createPass==0) fprintf(logFile, "WARNING! %s failed to create. %d\n", stringMutex, GetLastError()); else if (createPass==-1) fprintf(logFile, "ATTENTION! prohibited application %s may already be in use!\n" , stringMutex); } // End While Loop fclose(mutexFile); fclose(logFile); // Create a hearbeat and circulate while (LogExists){ heartbeat = fopen("\\SynchroLock\\Heartbeat.log","a+"); GetLocalTime(&HeartBeatTime); fprintf(heartbeat, "MutexLock %02d/%02d/%d %02d:%02d:%02d \n", HeartBeatTime.wDay, HeartBeatTime.wMonth, HeartBeatTime.wYear, HeartBeatTime.wHour, HeartBeatTime.wMinute, HeartBeatTime.wSecond); fclose(heartbeat); Sleep(360000); // sleep 60 seconds } }