--- embedtools/src/ub_env.c	2014/01/28 22:37:07	1.1.2.5
+++ embedtools/src/ub_env.c	2014/01/28 22:50:37	1.1.2.6
@@ -8,11 +8,16 @@ env_t *env;
 static int
 ub_flash_io(const char *csSec, int mode)
 {
-	int f, ret = 0;
+	int f, rlen, ret = 0;
 	const char *str;
+	size_t siz;
 
 	FTRACE(4);
 
+	str = cfg_getAttribute(&cfg, csSec, "size");
+	siz = strtol(str, NULL, 0);
+	if (!siz)
+		return -1;
 	str = cfg_getAttribute(&cfg, csSec, "drive");
 	if (!str) {
 		printf("Error:: drive not found!\n");
@@ -26,8 +31,19 @@ ub_flash_io(const char *csSec, int mode)
 	}
 
 	if (mode & O_RDWR) {
-	} else {
+		rlen = write(f, env, siz);
+		if (rlen != siz)
+			printf("Error:: written %d bytes != %d\n", rlen, siz);
+		else
+			VERB(3) printf("Written %d bytes\n", rlen);
+		lseek(f, 0, SEEK_SET);
 	}
+
+	rlen = read(f, env, siz);
+	if (rlen != siz)
+		printf("Error:: readed %d bytes != %d\n", rlen, siz);
+	else
+		VERB(3) printf("Readed %d bytes\n", rlen);
 
 	close(f);
 	return ret;