feat(config): Don't write if new string is equal to old string

epicardium/modules/config.c

@@ -507,6 +507,11 @@ int epic_config_set_string(const char *key, const char *value_in)
 		int fd2 = -1;
 		ret     = epic_config_get_string(key, buf, sizeof(buf));
 
+		if (ret == 0 && strcmp(buf, value) == 0) {
+			/* Nothing to do: the values are the same. */
+			return 0;
+		}
+
 		size_t nread = read_config_offset(
 			slot->value_offset, buf, sizeof(buf)
 		);