update sudo handling

check_ceph_diskfree

@@ -64,15 +64,16 @@ case "$1" in
     *)
 esac
 
+# --- check required tools
+ph.require ceph
+
 # set default / override from command line params
 typeset -i iWarnLimit=$(     ph.getValueWithParam 70 w "$@")
 typeset -i iCriticalLimit=$( ph.getValueWithParam 90 c "$@")
 
-
 if ! data=$( sudo -n /bin/ceph df 2>&1 )
 then
-    echo "$data"
-    ph.abort "UNKNOWN: ceph is not available or no sudo permissions to execute ceph commands."
+    ph.abort "UNKNOWN: No sudo permissions to execute ceph commands."
 fi
 
 isHeader=0