Fix argument check in main function and update usage message; modify addPersonToList return values; add file_operations header

src/main.c

@@ -11,12 +11,13 @@
 #include "users.h"
 #include "tui.h"
 #include "rfid_handler.h"
+#include "file_operations.h"
 
 int main(int argc, char const **argv)
 {
-    if (argc != 1)
+    if (argc != 2)
     {
-        printf("Usage: %s <Address of RFID reader>\n", argv[0]);
+        printf("filename argument required\nUsage: %s [User database]\n", argv[0]);
         return EXIT_FAILURE;
     }
 
@@ -45,8 +46,7 @@ int main(int argc, char const **argv)
     erase();
     refresh();
 
-    // uartDialog(uart_address, x_max, y_max);
-    strcpy(uart_address, argv[1]);
+    uartDialog(uart_address, x_max, y_max);
 
     pthread_create(&uart_thread, NULL, uartListener, uart_address);