// Partitions returns disk partitions. If all is false, returns
// physical devices only (e.g. hard disks, cd-rom drives, USB keys)
// and ignore all others (e.g. memory partitions such as /dev/shm)
//
// should use setmntent(3) but this implement use /etc/mtab file
func Partitions(all bool) ([]PartitionStat, error) {
filename := common.HostEtc("mtab")
lines, err := common.ReadLines(filename)
if err != nil {
return nil, err
}
fs, err := getFileSystems()
if err != nil {
return nil, err
}
ret := make([]PartitionStat, 0, len(lines))
for _, line := range lines {
fields := strings.Fields(line)
d := PartitionStat{
Device: fields[0],
Mountpoint: fields[1],
Fstype: fields[2],
Opts: fields[3],
}
if all == false {
if d.Device == "none" || !common.StringsHas(fs, d.Fstype) {
continue
}
}
ret = append(ret, d)
}
return ret, nil
}
func NetIOCounters(pernic bool) ([]NetIOCountersStat, error) {
out, err := exec.Command("/usr/bin/netstat", "-ibdn").Output()
if err != nil {
return nil, err
}
lines := strings.Split(string(out), "\n")
ret := make([]NetIOCountersStat, 0, len(lines)-1)
exists := make([]string, 0, len(ret))
for _, line := range lines {
values := strings.Fields(line)
if len(values) < 1 || values[0] == "Name" {
continue
}
if common.StringsHas(exists, values[0]) {
// skip if already get
continue
}
exists = append(exists, values[0])
base := 1
// sometimes Address is ommitted
if len(values) < 13 {
base = 0
}
parsed := make([]uint64, 0, 8)
vv := []string{
values[base+3], // PacketsRecv
values[base+4], // Errin
values[base+5], // Dropin
values[base+6], // BytesRecvn
values[base+7], // PacketSent
values[base+8], // Errout
values[base+9], // BytesSent
values[base+11], // Dropout
}
for _, target := range vv {
if target == "-" {
parsed = append(parsed, 0)
continue
}
t, err := strconv.ParseUint(target, 10, 64)
if err != nil {
return nil, err
}
parsed = append(parsed, t)
}
n := NetIOCountersStat{
Name: values[0],
PacketsRecv: parsed[0],
Errin: parsed[1],
Dropin: parsed[2],
BytesRecv: parsed[3],
PacketsSent: parsed[4],
Errout: parsed[5],
BytesSent: parsed[6],
Dropout: parsed[7],
}
ret = append(ret, n)
}
if pernic == false {
return getNetIOCountersAll(ret)
}
return ret, nil
}
func Virtualization() (string, string, error) {
var system string
var role string
filename := common.HostProc("xen")
if common.PathExists(filename) {
system = "xen"
role = "guest" // assume guest
if common.PathExists(filename + "/capabilities") {
contents, err := common.ReadLines(filename + "/capabilities")
if err == nil {
if common.StringsHas(contents, "control_d") {
role = "host"
}
}
}
}
filename = common.HostProc("modules")
if common.PathExists(filename) {
contents, err := common.ReadLines(filename)
if err == nil {
if common.StringsContains(contents, "kvm") {
system = "kvm"
role = "host"
} else if common.StringsContains(contents, "vboxdrv") {
system = "vbox"
role = "host"
} else if common.StringsContains(contents, "vboxguest") {
system = "vbox"
role = "guest"
}
}
}
filename = common.HostProc("cpuinfo")
if common.PathExists(filename) {
contents, err := common.ReadLines(filename)
if err == nil {
if common.StringsHas(contents, "QEMU Virtual CPU") ||
common.StringsHas(contents, "Common KVM processor") ||
common.StringsHas(contents, "Common 32-bit KVM processor") {
system = "kvm"
role = "guest"
}
}
}
filename = common.HostProc()
if common.PathExists(filename + "/bc/0") {
system = "openvz"
role = "host"
} else if common.PathExists(filename + "/vz") {
system = "openvz"
role = "guest"
}
// not use dmidecode because it requires root
if common.PathExists(filename + "/self/status") {
contents, err := common.ReadLines(filename + "/self/status")
if err == nil {
if common.StringsHas(contents, "s_context:") ||
common.StringsHas(contents, "VxID:") {
system = "linux-vserver"
}
// TODO: guest or host
}
}
if common.PathExists(filename + "/self/cgroup") {
contents, err := common.ReadLines(filename + "/self/cgroup")
if err == nil {
if common.StringsHas(contents, "lxc") ||
common.StringsHas(contents, "docker") {
system = "lxc"
role = "guest"
} else if common.PathExists("/usr/bin/lxc-version") { // TODO: which
system = "lxc"
role = "host"
}
}
}
return system, role, nil
}
// example of netstat -idbn output on yosemite
// Name Mtu Network Address Ipkts Ierrs Ibytes Opkts Oerrs Obytes Coll Drop
// lo0 16384 <Link#1> 869107 0 169411755 869107 0 169411755 0 0
// lo0 16384 ::1/128 ::1 869107 - 169411755 869107 - 169411755 - -
// lo0 16384 127 127.0.0.1 869107 - 169411755 869107 - 169411755 - -
func IOCounters(pernic bool) ([]IOCountersStat, error) {
netstat, err := exec.LookPath("/usr/sbin/netstat")
if err != nil {
return nil, err
}
out, err := invoke.Command(netstat, "-ibdnW")
if err != nil {
return nil, err
}
lines := strings.Split(string(out), "\n")
ret := make([]IOCountersStat, 0, len(lines)-1)
exists := make([]string, 0, len(ret))
for _, line := range lines {
values := strings.Fields(line)
if len(values) < 1 || values[0] == "Name" {
// skip first line
continue
}
if common.StringsHas(exists, values[0]) {
// skip if already get
continue
}
exists = append(exists, values[0])
base := 1
// sometimes Address is ommitted
if len(values) < 11 {
base = 0
}
parsed := make([]uint64, 0, 7)
vv := []string{
values[base+3], // Ipkts == PacketsRecv
values[base+4], // Ierrs == Errin
values[base+5], // Ibytes == BytesRecv
values[base+6], // Opkts == PacketsSent
values[base+7], // Oerrs == Errout
values[base+8], // Obytes == BytesSent
}
if len(values) == 12 {
vv = append(vv, values[base+10])
}
for _, target := range vv {
if target == "-" {
parsed = append(parsed, 0)
continue
}
t, err := strconv.ParseUint(target, 10, 64)
if err != nil {
return nil, err
}
parsed = append(parsed, t)
}
n := IOCountersStat{
Name: values[0],
PacketsRecv: parsed[0],
Errin: parsed[1],
BytesRecv: parsed[2],
PacketsSent: parsed[3],
Errout: parsed[4],
BytesSent: parsed[5],
}
if len(parsed) == 7 {
n.Dropout = parsed[6]
}
ret = append(ret, n)
}
if pernic == false {
return getIOCountersAll(ret)
}
return ret, nil
}