Moved permission table logic to a separate file

src/ui-socket.h

@@ -13,18 +13,31 @@
 #ifndef UI_SOCKET_H
 #define UI_SOCKET_H
 
+#include "process_info.h"
 #include <sys/types.h>
 
-struct process_info {
-  pid_t PID;
-  const char *name;
-  uid_t UID;
-};
+/**
+ * Initialize the GUI communication.
+ *
+ * @return: 0 on success, -1 on faliure.
+ */
+int init_ui_socket(void);
 
-int init_ui_socket();
-
-void destroy_ui_socket();
+/**
+ * Close the GUI communication.
+ */
+void destroy_ui_socket(void);
 
+/**
+ * Check access according to:
+ * 1. temporary permission table
+ * 2. permanent permission table
+ * 3. user descision
+ *
+ * @param filename: The file that the process is trying to access
+ * @pram pi: The process information
+ * @return: 0 if access is denied, 1 if access is allowed
+ */
 int interactive_access(const char *filename, struct process_info pi);
 
 #endif // !UI_SOCKET_H