Merge pull request #5285 from markt-de/fix_nsupdate

URGENT: fix dns_nsupdate when NSUPDATE_OPT is empty

Author: Neilpang

dnsapi/dns_nsupdate.sh

@@ -39,13 +39,15 @@ dns_nsupdate_add() {
   [ -n "$DEBUG" ] && [ "$DEBUG" -ge "$DEBUG_LEVEL_1" ] && nsdebug="-d"
   [ -n "$DEBUG" ] && [ "$DEBUG" -ge "$DEBUG_LEVEL_2" ] && nsdebug="-D"
   if [ -z "${NSUPDATE_ZONE}" ]; then
-    nsupdate -k "${NSUPDATE_KEY}" $nsdebug "${NSUPDATE_OPT}" <<EOF
+    #shellcheck disable=SC2086
+    nsupdate -k "${NSUPDATE_KEY}" $nsdebug $NSUPDATE_OPT <<EOF
 server ${NSUPDATE_SERVER}  ${NSUPDATE_SERVER_PORT}
 update add ${fulldomain}. 60 in txt "${txtvalue}"
 send
 EOF
   else
-    nsupdate -k "${NSUPDATE_KEY}" $nsdebug "${NSUPDATE_OPT}" <<EOF
+    #shellcheck disable=SC2086
+    nsupdate -k "${NSUPDATE_KEY}" $nsdebug $NSUPDATE_OPT <<EOF
 server ${NSUPDATE_SERVER}  ${NSUPDATE_SERVER_PORT}
 zone ${NSUPDATE_ZONE}.
 update add ${fulldomain}. 60 in txt "${txtvalue}"
@@ -77,13 +79,15 @@ dns_nsupdate_rm() {
   [ -n "$DEBUG" ] && [ "$DEBUG" -ge "$DEBUG_LEVEL_1" ] && nsdebug="-d"
   [ -n "$DEBUG" ] && [ "$DEBUG" -ge "$DEBUG_LEVEL_2" ] && nsdebug="-D"
   if [ -z "${NSUPDATE_ZONE}" ]; then
-    nsupdate -k "${NSUPDATE_KEY}" $nsdebug "${NSUPDATE_OPT}" <<EOF
+    #shellcheck disable=SC2086
+    nsupdate -k "${NSUPDATE_KEY}" $nsdebug $NSUPDATE_OPT <<EOF
 server ${NSUPDATE_SERVER}  ${NSUPDATE_SERVER_PORT}
 update delete ${fulldomain}. txt
 send
 EOF
   else
-    nsupdate -k "${NSUPDATE_KEY}" $nsdebug "${NSUPDATE_OPT}" <<EOF
+    #shellcheck disable=SC2086
+    nsupdate -k "${NSUPDATE_KEY}" $nsdebug $NSUPDATE_OPT <<EOF
 server ${NSUPDATE_SERVER}  ${NSUPDATE_SERVER_PORT}
 zone ${NSUPDATE_ZONE}.
 update delete ${fulldomain}. txt