commit 08e7fbbfec644406b5f6f3ce787444bc5e2c4b3d
Author: Gary Ching-Pang Lin <glin@suse.com>
Date:   Fri Mar 29 12:12:00 2013 +0800

    Make the error message more understandable

diff --git a/src/efilib.c b/src/efilib.c
index cb1aca6..1b72cd9 100644
--- a/src/efilib.c
+++ b/src/efilib.c
@@ -5,6 +5,7 @@
 #include <string.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <errno.h>
 #include "efi.h"
 
 #define SYSFS_DIR_EFI_VARS "/sys/firmware/efi/efivars"
@@ -95,7 +96,9 @@ read_variable (efi_variable_t *var)
 	snprintf (filename, PATH_MAX-1, "%s/%s", SYSFS_DIR_EFI_VARS, name);
 	fd = open (filename, O_RDONLY);
 	if (fd == -1) {
-		return EFI_NOT_FOUND;
+		if (errno == ENOENT)
+			return EFI_NOT_FOUND;
+		return EFI_INVALID_PARAMETER;
 	}
 
 	if (fstat (fd, &buf) != 0) {
diff --git a/src/mokutil.c b/src/mokutil.c
index 27ebf09..3f89db2 100644
--- a/src/mokutil.c
+++ b/src/mokutil.c
@@ -236,14 +236,20 @@ static int
 list_enrolled_keys ()
 {
 	efi_variable_t var;
+	efi_status_t status;
 	int ret;
 
 	memset (&var, 0, sizeof(var));
 	var.VariableName = "MokListRT";
-
 	var.VendorGuid = SHIM_LOCK_GUID;
 
-	if (read_variable (&var) != EFI_SUCCESS) {
+	status = read_variable (&var);
+	if (status != EFI_SUCCESS) {
+		if (status == EFI_NOT_FOUND) {
+			printf ("MokListRT is empty\n");
+			return 0;
+		}
+
 		fprintf (stderr, "Failed to read MokListRT\n");
 		return -1;
 	}
@@ -258,14 +264,20 @@ static int
 list_new_keys ()
 {
 	efi_variable_t var;
+	efi_status_t status;
 	int ret;
 
 	memset (&var, 0, sizeof(var));
 	var.VariableName = "MokNew";
-
 	var.VendorGuid = SHIM_LOCK_GUID;
 
-	if (read_variable (&var) != EFI_SUCCESS) {
+	status = read_variable (&var);
+	if (status != EFI_SUCCESS) {
+		if (status == EFI_NOT_FOUND) {
+			printf ("No MOK new key request\n");
+			return 0;
+		}
+
 		fprintf (stderr, "Failed to read MokNew\n");
 		return -1;
 	}
@@ -812,6 +824,7 @@ static int
 export_moks ()
 {
 	efi_variable_t var;
+	efi_status_t status;
 	char filename[PATH_MAX];
 	uint32_t mok_num;
 	MokListNode *list;
@@ -822,10 +835,15 @@ export_moks ()
 
 	memset (&var, 0, sizeof(var));
 	var.VariableName = "MokListRT";
-
 	var.VendorGuid = SHIM_LOCK_GUID;
 
-	if (read_variable (&var) != EFI_SUCCESS) {
+	status = read_variable (&var);
+	if (status != EFI_SUCCESS) {
+		if (status == EFI_NOT_FOUND) {
+			printf ("MokListRT is empty\n");
+			return 0;
+		}
+
 		fprintf (stderr, "Failed to read MokListRT\n");
 		return -1;
 	}