From 5ccc0757901419acc3b2decdac86ac133eb9647c Mon Sep 17 00:00:00 2001
From: Aaron LI <aly@aaronly.me>
Date: Sat, 10 Mar 2018 23:35:20 +0800
Subject: checksum_image(): Fix md5 check when given file doesn't exist

---
 dfly-update | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/dfly-update b/dfly-update
index 68efc99..e4666eb 100755
--- a/dfly-update
+++ b/dfly-update
@@ -32,6 +32,7 @@ EC_VN=17
 EC_TAR=18
 EC_MTREE=19
 EC_CPDUP=20
+EC_NOFILE=21
 
 
 #
@@ -266,8 +267,9 @@ checksum_image() {
     local file="$1"
     local md5_match="$2"
     local md5
-    [ -f "${file}" ] && md5=$(md5 -q "${file}")
-    if [ -n "${md5}" ] && [ "${md5}" = "${md5_match}" ]; then
+    [ -f "${file}" ] || error ${EC_NOFILE} "checksum_image: file not exists"
+    md5=$(md5 -q "${file}")
+    if [ "${md5}" = "${md5_match}" ]; then
         return 0
     else
         return 1
-- 
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