From cd39b973a1b8a0cd650d5d037331787762dfa5a2 Mon Sep 17 00:00:00 2001
From: Rene Zbinden <rene.zbinden@postfinance.ch>
Date: Thu, 7 Apr 2016 09:18:09 +0000
Subject: [PATCH] move pathe lookup for sadf to init()

---
 plugins/inputs/sysstat/sysstat.go | 20 +++++++++-----------
 1 file changed, 9 insertions(+), 11 deletions(-)

diff --git a/plugins/inputs/sysstat/sysstat.go b/plugins/inputs/sysstat/sysstat.go
index 6707f5bdd..d57bd10dc 100644
--- a/plugins/inputs/sysstat/sysstat.go
+++ b/plugins/inputs/sysstat/sysstat.go
@@ -176,13 +176,6 @@ func (s *Sysstat) Gather(acc telegraf.Accumulator) error {
 //     Sadc -S <Activity1> -S <Activity2> ... <collectInterval> 2 tmpFile
 // The above command collects system metrics during <collectInterval> and saves it in binary form to tmpFile.
 func (s *Sysstat) collect() error {
-	if len(s.Sadf) == 0 {
-		sadf, err := exec.LookPath("sadf")
-		if err != nil {
-			return errors.New("sadf not in $PATH, configure path to sadf")
-		}
-		s.Sadf = sadf
-	}
 	options := []string{}
 	for _, act := range s.Activities {
 		options = append(options, "-S", act)
@@ -315,10 +308,15 @@ func escape(dirty string) string {
 }
 
 func init() {
+	s := Sysstat{
+		Group:      true,
+		Activities: dfltActivities,
+	}
+	sadf, _ := exec.LookPath("sadf")
+	if len(sadf) > 0 {
+		s.Sadf = sadf
+	}
 	inputs.Add("sysstat", func() telegraf.Input {
-		return &Sysstat{
-			Group:      true,
-			Activities: dfltActivities,
-		}
+		return &s
 	})
 }