check required jq

show_ttls.sh

@@ -6,9 +6,10 @@
 #
 # ----------------------------------------------------------------------
 # 2022-09-14  v1.0  <axel.hahn@iml.unibe.ch>  initial version
+# 2022-09-15  v1.1  <axel.hahn@iml.unibe.ch>  check required jq
 # ======================================================================
 
-_version="1.0"
+_version="1.1"
 
 # ----------------------------------------------------------------------
 # HELP
@@ -22,6 +23,7 @@ Search for hostnames in Infoblox API and show all hosts that have an
 activated custom ttl value.
 
 It uses dns-api.sh and adds the return field for aliases.
+The filter functionality of json data requires jq.
 
 SYNTAX: dns-search.sh REGEX
 
@@ -41,5 +43,10 @@ mysearch=$1
 >&2 echo ";"
 >&2 echo "; >>>>>>>>>> INFOBLOX DNS HELPER TTL v$_version"
 >&2 echo ";"
+
+which jq >/dev/null || exit
+
 "$( dirname $0 )"/dns-api.sh GET "/record:host?name~=${mysearch}&_return_fields%2B=ttl,use_ttl" \
     | jq -r '.[]  | select ( .use_ttl == true and .ttl != null ) | .name,.ttl'
+
+# ----------------------------------------------------------------------
\ No newline at end of file