Moved permission table logic to a separate file

src/temp_permissions_table.h

@@ -0,0 +1,39 @@
+
+#ifndef TEMP_PERMISSIONS_TABLE_H
+#define TEMP_PERMISSIONS_TABLE_H
+
+#include "process_info.h"
+
+/**
+ * Initializes the temporary permissions table.
+ *
+ * @return: 0 on success, -1 on failure (e.g. ENOMEM)
+ */
+int init_temp_permissions_table();
+
+/**
+ * Destroys the temporary permissions table.
+ *
+ * @note: the table is guranteed to be destroyed if it is already initialized
+ */
+void destroy_temp_permissions_table();
+
+/**
+ * Checks if the process has a temporary access to the file.
+ *
+ * @param filename: The file that the process is trying to access
+ * @param pi: The process information
+ * @return: 0 if access is denied, 1 if access is allowed
+ */
+int check_temp_access(const char *filename, struct process_info pi);
+
+/**
+ * Gives temporary access to the process to the file.
+ *
+ * @param filename: The file that the process is trying to access
+ * @param pi: The process information
+ * @return: 0 on success, -1 on failure (e.g. ENOMEM)
+ */
+int give_temp_access(const char *filename, struct process_info pi);
+
+#endif // !TEMP_PERMISSIONS_TABLE_H