From 93fc48a2dbbe6cc0d07737b8d8c4b756162536fe Mon Sep 17 00:00:00 2001
From: neilpang <github@byneil.com>
Date: Tue, 1 Nov 2016 19:14:33 +0800
Subject: [PATCH] add more error check

---
 acme.sh | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/acme.sh b/acme.sh
index bb773241..e1b1cf45 100755
--- a/acme.sh
+++ b/acme.sh
@@ -1846,7 +1846,7 @@ _clearup() {
 _clearupdns() {
   _debug "_clearupdns"
   if [ "$dnsadded" != 1 ] || [ -z "$vlist" ] ; then
-    _info "Dns not added, skip."
+    _debug "Dns not added, skip."
     return
   fi
 
@@ -2567,7 +2567,15 @@ issue() {
         _debug "writing token:$token to $wellknown_path/$token"
 
         mkdir -p "$wellknown_path"
-        printf "%s" "$keyauthorization" > "$wellknown_path/$token"
+
+        if ! printf "%s" "$keyauthorization" > "$wellknown_path/$token" ; then
+          _err "$d:Can not write token to file : $wellknown_path/$token"
+          _clearupwebbroot "$_currentRoot" "$removelevel" "$token"
+          _clearup
+          _on_issue_err
+          return 1
+        fi
+
         if [ ! "$usingApache" ] ; then
           if webroot_owner=$(_stat $_currentRoot) ; then
             _debug "Changing owner/group of .well-known to $webroot_owner"