func ListeningPorts() ([]int64, error) {
ports := []int64{}
bs, err := sys.CmdOutBytes("ss", "-t", "-l", "-n")
if err != nil {
return ports, err
}
reader := bufio.NewReader(bytes.NewBuffer(bs))
// ignore the first line
line, err := file.ReadLine(reader)
if err != nil {
return ports, err
}
for {
line, err = file.ReadLine(reader)
if err == io.EOF {
err = nil
break
} else if err != nil {
return ports, err
}
fields := strings.Fields(string(line))
fieldsLen := len(fields)
if fieldsLen != 4 && fieldsLen != 5 {
return ports, fmt.Errorf("output of [ss -t -l -n] format not supported")
}
portColumnIndex := 2
if fieldsLen == 5 {
portColumnIndex = 3
}
location := strings.LastIndex(fields[portColumnIndex], ":")
port := fields[portColumnIndex][location+1:]
if p, e := strconv.ParseInt(port, 10, 64); e != nil {
return ports, fmt.Errorf("parse port to int64 fail: %s", e.Error())
} else {
ports = append(ports, p)
}
}
return slice.UniqueInt64(ports), nil
}
// @param ext e.g. TcpExt or IpExt
func Netstat(ext string) (ret map[string]uint64, err error) {
ret = make(map[string]uint64)
var contents []byte
contents, err = ioutil.ReadFile("/proc/net/netstat")
if err != nil {
return
}
reader := bufio.NewReader(bytes.NewBuffer(contents))
for {
var bs []byte
bs, err = file.ReadLine(reader)
if err == io.EOF {
err = nil
break
} else if err != nil {
return
}
line := string(bs)
idx := strings.Index(line, ":")
if idx < 0 {
continue
}
title := strings.TrimSpace(line[:idx])
if title == ext {
ths := strings.Fields(strings.TrimSpace(line[idx+1:]))
// the next line must be values
bs, err = file.ReadLine(reader)
if err != nil {
return
}
valLine := string(bs)
tds := strings.Fields(strings.TrimSpace(valLine[idx+1:]))
for i := 0; i < len(ths); i++ {
ret[ths[i]], err = strconv.ParseUint(tds[i], 10, 64)
if err != nil {
return
}
}
return
}
}
return
}
func SocketStatSummary() (m map[string]uint64, err error) {
m = make(map[string]uint64)
var bs []byte
bs, err = sys.CmdOutBytes("sh", "-c", "ss -s")
if err != nil {
return
}
reader := bufio.NewReader(bytes.NewBuffer(bs))
// ignore the first line
line, e := file.ReadLine(reader)
if e != nil {
return m, e
}
for {
line, err = file.ReadLine(reader)
if err != nil {
return
}
lineStr := string(line)
if strings.HasPrefix(lineStr, "TCP") {
left := strings.Index(lineStr, "(")
right := strings.Index(lineStr, ")")
if left < 0 || right < 0 {
continue
}
content := lineStr[left+1 : right]
arr := strings.Split(content, ", ")
for _, val := range arr {
fields := strings.Fields(val)
if fields[0] == "timewait" {
timewait_arr := strings.Split(fields[1], "/")
m["timewait"], _ = strconv.ParseUint(timewait_arr[0], 10, 64)
m["slabinfo.timewait"], _ = strconv.ParseUint(timewait_arr[1], 10, 64)
continue
}
m[fields[0]], _ = strconv.ParseUint(fields[1], 10, 64)
}
return
}
}
return
}
func ReadName(path string) (name string, err error) {
var content []byte
content, err = ioutil.ReadFile(path)
if err != nil {
return
}
reader := bufio.NewReader(bytes.NewBuffer(content))
for {
var bs []byte
bs, err = file.ReadLine(reader)
if err == io.EOF {
return
}
line := string(bs)
colonIndex := strings.Index(line, ":")
if strings.TrimSpace(line[0:colonIndex]) == "Name" {
return strings.TrimSpace(line[colonIndex+1:]), nil
}
}
return
}
func CpuMHz() (mhz string, err error) {
f := "/proc/cpuinfo"
var bs []byte
bs, err = ioutil.ReadFile(f)
if err != nil {
return
}
reader := bufio.NewReader(bytes.NewBuffer(bs))
for {
var lineBytes []byte
lineBytes, err = file.ReadLine(reader)
if err == io.EOF {
return
}
line := string(lineBytes)
if !strings.Contains(line, "MHz") {
continue
}
arr := strings.Split(line, ":")
if len(arr) != 2 {
return "", fmt.Errorf("%s content format error", f)
}
return strings.TrimSpace(arr[1]), nil
}
return "", fmt.Errorf("no MHz in %s", f)
}
func PingStatSummary(ip string, count, timeout int) (m map[string]string, err error) {
m = make(map[string]string)
var bs []byte
bs, err = sys.CmdOutBytes("ping", "-c", strconv.Itoa(count), "-W", strconv.Itoa(timeout), ip)
if err != nil {
return m, err
}
reader := bufio.NewReader(bytes.NewBuffer(bs))
// ignore the first line
line, e := file.ReadLine(reader)
if e != nil {
return m, e
}
for {
line, err = file.ReadLine(reader)
if err == io.EOF {
err = nil
break
} else if err != nil {
return m, err
}
lineStr := string(line)
if strings.Contains(lineStr, "packet loss") {
arr := strings.Split(lineStr, ", ")
for _, val := range arr {
fields := strings.Fields(val)
if fields[1] == "packet" {
m["pkloss"] = fields[0]
}
}
}
if strings.Contains(lineStr, "min/avg/max") {
fields := strings.Fields(lineStr)
result := strings.Split(fields[3], "/")
m["min"] = result[0]
m["avg"] = result[1]
m["max"] = result[2]
}
}
return m, e
}
func MemInfo() (*Mem, error) {
contents, err := ioutil.ReadFile("/proc/meminfo")
if err != nil {
return nil, err
}
memInfo := &Mem{}
reader := bufio.NewReader(bytes.NewBuffer(contents))
for {
line, err := file.ReadLine(reader)
if err == io.EOF {
err = nil
break
} else if err != nil {
return nil, err
}
fields := strings.Fields(string(line))
fieldName := fields[0]
_, ok := WANT[fieldName]
if ok && len(fields) == 3 {
val, numerr := strconv.ParseUint(fields[1], 10, 64)
if numerr != nil {
continue
}
switch fieldName {
case "Buffers:":
memInfo.Buffers = val * Multi
case "Cached:":
memInfo.Cached = val * Multi
case "MemTotal:":
memInfo.MemTotal = val * Multi
case "MemFree:":
memInfo.MemFree = val * Multi
case "SwapTotal:":
memInfo.SwapTotal = val * Multi
case "SwapFree:":
memInfo.SwapFree = val * Multi
}
}
}
memInfo.SwapUsed = memInfo.SwapTotal - memInfo.SwapFree
return memInfo, nil
}
func probeUrl(furl string, timeout string) (bool, error) {
bs, err := sys.CmdOutBytes("curl", "--max-filesize", "102400", "-I", "-m", timeout, "-o", "/dev/null", "-s", "-w", "%{http_code}", furl)
if err != nil {
log.Printf("probe url [%v] failed.the err is: [%v]\n", furl, err)
return false, err
}
reader := bufio.NewReader(bytes.NewBuffer(bs))
retcode, err := file.ReadLine(reader)
if err != nil {
log.Println("read retcode failed.err is:", err)
return false, err
}
if strings.TrimSpace(string(retcode)) != "200" {
log.Printf("return code [%v] is not 200.query url is [%v]", string(retcode), furl)
return false, err
}
return true, err
}
func CurrentProcStat() (*ProcStat, error) {
f := "/proc/stat"
bs, err := ioutil.ReadFile(f)
if err != nil {
return nil, err
}
ps := &ProcStat{Cpus: make([]*CpuUsage, NumCpu())}
reader := bufio.NewReader(bytes.NewBuffer(bs))
for {
line, err := file.ReadLine(reader)
if err == io.EOF {
err = nil
break
} else if err != nil {
return ps, err
}
parseLine(line, ps)
}
return ps, nil
}
// return: [][$fs_spec, $fs_file, $fs_vfstype]
func ListMountPoint() ([][3]string, error) {
contents, err := ioutil.ReadFile("/proc/mounts")
if err != nil {
return nil, err
}
ret := make([][3]string, 0)
reader := bufio.NewReader(bytes.NewBuffer(contents))
for {
line, err := file.ReadLine(reader)
if err == io.EOF {
err = nil
break
} else if err != nil {
return nil, err
}
fields := strings.Fields(string(line))
// Docs come from the fstab(5)
// fs_spec # Mounted block special device or remote filesystem e.g. /dev/sda1
// fs_file # Mount point e.g. /data
// fs_vfstype # File system type e.g. ext4
// fs_mntops # Mount options
// fs_freq # Dump(8) utility flags
// fs_passno # Order in which filesystem checks are done at reboot time
fs_spec := fields[0]
fs_file := fields[1]
fs_vfstype := fields[2]
if _, exist := FSSPEC_IGNORE[fs_spec]; exist {
continue
}
if _, exist := FSTYPE_IGNORE[fs_vfstype]; exist {
continue
}
if strings.HasPrefix(fs_vfstype, "fuse") {
continue
}
if IgnoreFsFile(fs_file) {
continue
}
// keep /dev/xxx device with shorter fs_file (remove mount binds)
if strings.HasPrefix(fs_spec, "/dev") {
deviceFound := false
for idx := range ret {
if ret[idx][0] == fs_spec {
deviceFound = true
if len(fs_file) < len(ret[idx][1]) {
ret[idx][1] = fs_file
}
break
}
}
if !deviceFound {
ret = append(ret, [3]string{fs_spec, fs_file, fs_vfstype})
}
} else {
ret = append(ret, [3]string{fs_spec, fs_file, fs_vfstype})
}
}
return ret, nil
}
/*
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
eth0: 1990350 2838 0 0 0 0 0 0 401351 2218 0 0 0 0 0 0
lo: 26105 286 0 0 0 0 0 0 26105 286 0 0 0 0 0 0
*/
func NetIfs(onlyPrefix []string) ([]*NetIf, error) {
contents, err := ioutil.ReadFile("/proc/net/dev")
if err != nil {
return nil, err
}
ret := []*NetIf{}
reader := bufio.NewReader(bytes.NewBuffer(contents))
for {
lineBytes, err := file.ReadLine(reader)
if err == io.EOF {
err = nil
break
} else if err != nil {
return nil, err
}
line := string(lineBytes)
idx := strings.Index(line, ":")
if idx < 0 {
continue
}
netIf := NetIf{}
eth := strings.TrimSpace(line[0:idx])
if len(onlyPrefix) > 0 {
found := false
for _, prefix := range onlyPrefix {
if strings.HasPrefix(eth, prefix) {
found = true
break
}
}
if !found {
continue
}
}
netIf.Iface = eth
fields := strings.Fields(line[idx+1:])
if len(fields) != 16 {
continue
}
netIf.InBytes, _ = strconv.ParseInt(fields[0], 10, 64)
netIf.InPackages, _ = strconv.ParseInt(fields[1], 10, 64)
netIf.InErrors, _ = strconv.ParseInt(fields[2], 10, 64)
netIf.InDropped, _ = strconv.ParseInt(fields[3], 10, 64)
netIf.InFifoErrs, _ = strconv.ParseInt(fields[4], 10, 64)
netIf.InFrameErrs, _ = strconv.ParseInt(fields[5], 10, 64)
netIf.InCompressed, _ = strconv.ParseInt(fields[6], 10, 64)
netIf.InMulticast, _ = strconv.ParseInt(fields[7], 10, 64)
netIf.OutBytes, _ = strconv.ParseInt(fields[8], 10, 64)
netIf.OutPackages, _ = strconv.ParseInt(fields[9], 10, 64)
netIf.OutErrors, _ = strconv.ParseInt(fields[10], 10, 64)
netIf.OutDropped, _ = strconv.ParseInt(fields[11], 10, 64)
netIf.OutFifoErrs, _ = strconv.ParseInt(fields[12], 10, 64)
netIf.OutCollisions, _ = strconv.ParseInt(fields[13], 10, 64)
netIf.OutCarrierErrs, _ = strconv.ParseInt(fields[14], 10, 64)
netIf.OutCompressed, _ = strconv.ParseInt(fields[15], 10, 64)
netIf.TotalBytes = netIf.InBytes + netIf.OutBytes
netIf.TotalPackages = netIf.InPackages + netIf.OutPackages
netIf.TotalErrors = netIf.InErrors + netIf.OutErrors
netIf.TotalDropped = netIf.InDropped + netIf.OutDropped
speedFile := fmt.Sprintf("/sys/class/net/%s/speed", netIf.Iface)
if content, err := ioutil.ReadFile(speedFile); err == nil {
var speed int64
speed, err = strconv.ParseInt(strings.TrimSpace(string(content)), 10, 64)
if err != nil {
netIf.SpeedBits = int64(0)
netIf.InPercent = float64(0)
netIf.OutPercent = float64(0)
} else if speed == 0 {
netIf.SpeedBits = int64(0)
netIf.InPercent = float64(0)
netIf.OutPercent = float64(0)
} else {
netIf.SpeedBits = speed * MILLION_BIT
netIf.InPercent = float64(netIf.InBytes*BITS_PER_BYTE) * 100.0 / float64(netIf.SpeedBits)
netIf.OutPercent = float64(netIf.OutBytes*BITS_PER_BYTE) * 100.0 / float64(netIf.SpeedBits)
}
} else {
netIf.SpeedBits = int64(0)
netIf.InPercent = float64(0)
netIf.OutPercent = float64(0)
}
ret = append(ret, &netIf)
}
return ret, nil
}
/*
Inter-| Receive | Transmit
face |bytes packets errs drop fifo frame compressed multicast|bytes packets errs drop fifo colls carrier compressed
eth0: 1990350 2838 0 0 0 0 0 0 401351 2218 0 0 0 0 0 0
lo: 26105 286 0 0 0 0 0 0 26105 286 0 0 0 0 0 0
*/
func NetIfs(onlyPrefix []string) ([]*NetIf, error) {
contents, err := ioutil.ReadFile("/proc/net/dev")
if err != nil {
return nil, err
}
ret := []*NetIf{}
reader := bufio.NewReader(bytes.NewBuffer(contents))
for {
lineBytes, err := file.ReadLine(reader)
if err == io.EOF {
err = nil
break
} else if err != nil {
return nil, err
}
line := string(lineBytes)
idx := strings.Index(line, ":")
if idx < 0 {
continue
}
netIf := NetIf{}
eth := strings.TrimSpace(line[0:idx])
if len(onlyPrefix) > 0 {
found := false
for _, prefix := range onlyPrefix {
if strings.HasPrefix(eth, prefix) {
found = true
break
}
}
if !found {
continue
}
}
netIf.Iface = eth
fields := strings.Fields(line[idx+1:])
if len(fields) != 16 {
continue
}
netIf.InBytes, _ = strconv.ParseInt(fields[0], 10, 64)
netIf.InPackages, _ = strconv.ParseInt(fields[1], 10, 64)
netIf.InErrors, _ = strconv.ParseInt(fields[2], 10, 64)
netIf.InDropped, _ = strconv.ParseInt(fields[3], 10, 64)
netIf.InFifoErrs, _ = strconv.ParseInt(fields[4], 10, 64)
netIf.InFrameErrs, _ = strconv.ParseInt(fields[5], 10, 64)
netIf.InCompressed, _ = strconv.ParseInt(fields[6], 10, 64)
netIf.InMulticast, _ = strconv.ParseInt(fields[7], 10, 64)
netIf.OutBytes, _ = strconv.ParseInt(fields[8], 10, 64)
netIf.OutPackages, _ = strconv.ParseInt(fields[9], 10, 64)
netIf.OutErrors, _ = strconv.ParseInt(fields[10], 10, 64)
netIf.OutDropped, _ = strconv.ParseInt(fields[11], 10, 64)
netIf.OutFifoErrs, _ = strconv.ParseInt(fields[12], 10, 64)
netIf.OutCollisions, _ = strconv.ParseInt(fields[13], 10, 64)
netIf.OutCarrierErrs, _ = strconv.ParseInt(fields[14], 10, 64)
netIf.OutCompressed, _ = strconv.ParseInt(fields[15], 10, 64)
netIf.TotalBytes = netIf.InBytes + netIf.OutBytes
netIf.TotalPackages = netIf.InPackages + netIf.OutPackages
netIf.TotalErrors = netIf.InErrors + netIf.OutErrors
netIf.TotalDropped = netIf.InDropped + netIf.OutDropped
ret = append(ret, &netIf)
}
return ret, nil
}
func ListDiskStats() ([]*DiskStats, error) {
proc_diskstats := "/proc/diskstats"
if !file.IsExist(proc_diskstats) {
return nil, fmt.Errorf("%s not exists", proc_diskstats)
}
contents, err := ioutil.ReadFile(proc_diskstats)
if err != nil {
return nil, err
}
ret := make([]*DiskStats, 0)
reader := bufio.NewReader(bytes.NewBuffer(contents))
for {
line, err := file.ReadLine(reader)
if err == io.EOF {
err = nil
break
} else if err != nil {
return nil, err
}
fields := strings.Fields(string(line))
// shortcut the deduper and just skip disks that
// haven't done a single read. This elimiates a bunch
// of loopback, ramdisk, and cdrom devices but still
// lets us report on the rare case that we actually use
// a ramdisk.
if fields[3] == "0" {
continue
}
size := len(fields)
// kernel version too low
if size != 14 {
continue
}
item := &DiskStats{}
if item.Major, err = strconv.Atoi(fields[0]); err != nil {
return nil, err
}
if item.Minor, err = strconv.Atoi(fields[1]); err != nil {
return nil, err
}
item.Device = fields[2]
if item.ReadRequests, err = strconv.ParseUint(fields[3], 10, 64); err != nil {
return nil, err
}
if item.ReadMerged, err = strconv.ParseUint(fields[4], 10, 64); err != nil {
return nil, err
}
if item.ReadSectors, err = strconv.ParseUint(fields[5], 10, 64); err != nil {
return nil, err
}
if item.MsecRead, err = strconv.ParseUint(fields[6], 10, 64); err != nil {
return nil, err
}
if item.WriteRequests, err = strconv.ParseUint(fields[7], 10, 64); err != nil {
return nil, err
}
if item.WriteMerged, err = strconv.ParseUint(fields[8], 10, 64); err != nil {
return nil, err
}
if item.WriteSectors, err = strconv.ParseUint(fields[9], 10, 64); err != nil {
return nil, err
}
if item.MsecWrite, err = strconv.ParseUint(fields[10], 10, 64); err != nil {
return nil, err
}
if item.IosInProgress, err = strconv.ParseUint(fields[11], 10, 64); err != nil {
return nil, err
}
if item.MsecTotal, err = strconv.ParseUint(fields[12], 10, 64); err != nil {
return nil, err
}
if item.MsecWeightedTotal, err = strconv.ParseUint(fields[13], 10, 64); err != nil {
return nil, err
}
item.TS = time.Now()
ret = append(ret, item)
}
return ret, nil
}