implements net_io_counters on linux.

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

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
+}