Merge pull request #509 from glance-/bash-memcached

Add a plain bash version of memcached helper

snmp/memcached.sh

@@ -0,0 +1,49 @@
+#!/bin/bash
+
+declare -A stats
+
+exec 200<>/dev/tcp/localhost/11211
+echo "stats" >&200
+echo "quit" >&200
+
+while read -r pre var val ; do 
+	if [ "$pre" = "END" ] ; then
+        break
+    elif [ "$pre" = "STAT" ] ; then
+		val="${val/$'\r'/}"
+		if [ "$var" = "rusage_system" ] || [ "$var" = "rusage_user" ] ; then
+			val=$(bc -l <<< "scale=0 ; ($val * 1000)/1")
+			var+="_microseconds"
+		fi
+		stats["$var"]=$val
+	fi
+done <&200
+
+exec 200>&-
+
+cat <<EOD
+{
+    "data": {
+        "localhost:11211": {
+EOD
+
+for var in "${!stats[@]}" ; do
+	val=${stats["$var"]}
+	if [ "$val" -eq "$val" ] 2>/dev/null ; then
+		#echo -nE "s:${#var}:\"$var\";i:$val;"
+		echo "\"$var\": $val,"
+	else
+		#echo -nE "s:${#var}:\"$var\";s:${#val}:\"$val\";"
+		echo "\"$var\": \"$val\","
+	fi
+done
+echo '"dummy":"value"'
+
+cat <<EOD
+        }
+    },
+    "error": 0,
+    "errorString": "SUCCESS",
+    "version": "1.1"
+}
+EOD