From bdda59ce541dc0be0092328ba74f01f057871989 Mon Sep 17 00:00:00 2001
From: Ilya Mashchenko <ilya@netdata.cloud>
Date: Mon, 3 Aug 2020 14:21:51 +0300
Subject: charts.d: fix `current_time_ms_from_date` on macOS (#9636)

---
 collectors/charts.d.plugin/loopsleepms.sh.inc | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

(limited to 'collectors/charts.d.plugin/loopsleepms.sh.inc')

diff --git a/collectors/charts.d.plugin/loopsleepms.sh.inc b/collectors/charts.d.plugin/loopsleepms.sh.inc
index 8fefb5844b..c386083fb4 100644
--- a/collectors/charts.d.plugin/loopsleepms.sh.inc
+++ b/collectors/charts.d.plugin/loopsleepms.sh.inc
@@ -10,16 +10,24 @@ fi
 # -----------------------------------------------------------------------------
 # use the date command as a high resolution timer
 
+# macOS 'date' doesnt support '%N' precision
+# echo $(/bin/date +"%N") is "N"
+if [ "$($LOOPSLEEP_DATE +"%N")" = "N" ]; then
+  LOOPSLEEP_DATE_FORMAT="%s * 1000"
+else
+  LOOPSLEEP_DATE_FORMAT="%s * 1000 + 10#%-N / 1000000"
+fi
+
 now_ms=
 LOOPSLEEPMS_HIGHRES=1
 test "$($LOOPSLEEP_DATE +%N)" = "%N" && LOOPSLEEPMS_HIGHRES=0
 test -z "$($LOOPSLEEP_DATE +%N)" && LOOPSLEEPMS_HIGHRES=0
 current_time_ms_from_date() {
-	if [ $LOOPSLEEPMS_HIGHRES -eq 0 ]; then
-		now_ms="$($LOOPSLEEP_DATE +'%s')000"
-	else
-		now_ms="$(($($LOOPSLEEP_DATE +'%s * 1000 + 10#%-N / 1000000')))"
-	fi
+  if [ $LOOPSLEEPMS_HIGHRES -eq 0 ]; then
+    now_ms="$($LOOPSLEEP_DATE +'%s')000"
+  else
+    now_ms="$(($($LOOPSLEEP_DATE +"$LOOPSLEEP_DATE_FORMAT")))"
+  fi
 }
 
 # -----------------------------------------------------------------------------
-- 
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