--- a/uicc/readcmd.c	Thu Feb 04 05:12:24 2021 +0000
+++ b/uicc/readcmd.c	Sat Feb 06 02:03:11 2021 +0000
@@ -40,10 +40,20 @@
 			"error: record number argument is out of range\n");
 		return(-1);
 	}
-	len = strtoul(argv[2], 0, 0);
-	if (len < 1 || len > 255) {
-		fprintf(stderr, "error: length argument is out of range\n");
-		return(-1);
+	if (argv[2]) {
+		len = strtoul(argv[2], 0, 0);
+		if (len < 1 || len > 255) {
+			fprintf(stderr,
+				"error: length argument is out of range\n");
+			return(-1);
+		}
+	} else {
+		if (!last_sel_file_record_len) {
+			fprintf(stderr,
+			"error: no current file record length is available\n");
+			return(-1);
+		}
+		len = last_sel_file_record_len;
 	}
 	rc = readrec_op(recno, 0x04, len);
 	if (rc < 0)