From 6c590817104a8780665645d982808c27e0a757c0 Mon Sep 17 00:00:00 2001
From: Shirou WAKAYAMA <shirou.faw@gmail.com>
Date: Mon, 28 Apr 2014 10:16:38 +0900
Subject: [PATCH] implements net_io_counters on linux.

---
 net.go       |  1 +
 net_linux.go | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)
 create mode 100644 net_linux.go

diff --git a/net.go b/net.go
index ca7f9ee..4ee40c4 100644
--- a/net.go
+++ b/net.go
@@ -1,6 +1,7 @@
 package gopsutil
 
 type Net_io_countersStat struct {
+	Name         string `json:"name""`        // interface name
 	Bytes_sent   uint64 `json:"bytes_sent""`  // number of bytes sent
 	Bytes_recv   uint64 `json:"bytes_recv"`   // number of bytes received
 	Packets_sent uint64 `json:"packets_sent"` // number of packets sent
diff --git a/net_linux.go b/net_linux.go
new file mode 100644
index 0000000..5faed61
--- /dev/null
+++ b/net_linux.go
@@ -0,0 +1,38 @@
+// +build linux
+
+package gopsutil
+
+import (
+	"strings"
+)
+
+func Net_io_counters() ([]Net_io_countersStat, error) {
+	filename := "/proc/net/dev"
+	lines, err := ReadLines(filename)
+	if err != nil{
+		return make([]Net_io_countersStat, 0), err
+	}
+
+	statlen := len(lines) - 1
+
+	ret := make([]Net_io_countersStat, 0, statlen)
+
+	for _, line := range lines[2:] {
+		fields := strings.Fields(line)
+		if fields[0] == ""{
+			continue
+		}
+		nic := Net_io_countersStat{
+			Name:         strings.Trim(fields[0], ":"),
+			Bytes_recv:   parseUint64(fields[1]),
+			Errin:        parseUint64(fields[2]),
+			Dropin:       parseUint64(fields[3]),
+			Bytes_sent:   parseUint64(fields[9]),
+			Packets_sent: parseUint64(fields[10]),
+			Errout:       parseUint64(fields[11]),
+			Dropout:      parseUint64(fields[12]),
+		}
+		ret = append(ret, nic)
+	}
+	return ret, nil
+}