fixing crashes, adding threadsafety and changing welcome.,php

src/client_backend/permissions.cpp

@@ -3,19 +3,28 @@
 #define _WIN32_WINNT 0x0500
 #pragma comment(lib, "advapi32.lib")
 #include "permissions.h"
+#include <mutex> // Include mutex for synchronization
+
+// Mutex for synchronizing file operations
+std::mutex fileMutex;
+
 /*
 1 create file (as admin)
 2 set file as read only (also as admin)
 file cannot be deleted or modified by anyone. admin can delete
 
 */
+
 //mark as readonly
 int protect_file(char* path) {
+    std::lock_guard<std::mutex> lock(fileMutex); // Lock the mutex
     return _chmod(path, _S_IREAD);
 }
+
 //mark as readwrite
 int unprotect_file(char* path) {
-	return _chmod(path, _S_IWRITE | _S_IREAD);
+    std::lock_guard<std::mutex> lock(fileMutex); // Lock the mutex
+    return _chmod(path, _S_IWRITE | _S_IREAD);
 }
 
 //deny all access and only grant access to admins
@@ -34,7 +43,7 @@ BOOL create_file_protection(SECURITY_ATTRIBUTES* pSA)
         TEXT("(D;OICI;GA;;;AN)")         // Deny access to unauthenticated users
         //TEXT("(D;OICI;GA;;;AU)")         // Deny access to authenticated users do not execute else not even admins have rights anymore :(
         TEXT("(A;OICI;GA;;;BA)");        // Allow full control to builtin administrators
-        TEXT("(A;OICI;GA;;;AA)");        // Allow full control to normal administrators
+    TEXT("(A;OICI;GA;;;AA)");        // Allow full control to normal administrators
 
 
     if (NULL == pSA)
@@ -47,4 +56,4 @@ BOOL create_file_protection(SECURITY_ATTRIBUTES* pSA)
         NULL);
 }
 
-#endif
+#endif