check.d/{disks,ntp}: Only perform the checks if relevant programs exist.

[rcheck] / check.d / ntp

diff --git a/check.d/ntp b/check.d/ntp
index 68e8ac2..3f95498 100755 (executable)
--- a/check.d/ntp
+++ b/check.d/ntp
@@ -1,5 +1,7 @@
 #! /bin/sh -e
 
+if [ ! -x /usr/sbin/ntpc ]; then exit 0; fi
+
 ntpdc -c peers | {
   any=nil
   while read remote local st poll reach delay offset disp; do