// Get num_fds from /proc/(pid)/fd
func (p *Process) fillFromfd() (int32, []*OpenFilesStat, error) {
pid := p.Pid
statPath := common.HostProc(strconv.Itoa(int(pid)), "fd")
d, err := os.Open(statPath)
if err != nil {
return 0, nil, err
}
defer d.Close()
fnames, err := d.Readdirnames(-1)
numFDs := int32(len(fnames))
openfiles := make([]*OpenFilesStat, numFDs)
for _, fd := range fnames {
fpath := filepath.Join(statPath, fd)
filepath, err := os.Readlink(fpath)
if err != nil {
continue
}
t, err := strconv.ParseUint(fd, 10, 64)
if err != nil {
return numFDs, openfiles, err
}
o := &OpenFilesStat{
Path: filepath,
Fd: t,
}
openfiles = append(openfiles, o)
}
return numFDs, openfiles, nil
}
// Get exe from /proc/(pid)/exe
func (p *Process) fillFromExe() (string, error) {
pid := p.Pid
exePath := common.HostProc(strconv.Itoa(int(pid)), "exe")
exe, err := os.Readlink(exePath)
if err != nil {
return "", err
}
return string(exe), nil
}
// Get cwd from /proc/(pid)/cwd
func (p *Process) fillFromCwd() (string, error) {
pid := p.Pid
cwdPath := common.HostProc(strconv.Itoa(int(pid)), "cwd")
cwd, err := os.Readlink(cwdPath)
if err != nil {
return "", err
}
return string(cwd), nil
}
func (p *Process) fillFromStat() (string, int32, *cpu.CPUTimesStat, int64, int32, error) {
pid := p.Pid
statPath := common.HostProc(strconv.Itoa(int(pid)), "stat")
contents, err := ioutil.ReadFile(statPath)
if err != nil {
return "", 0, nil, 0, 0, err
}
fields := strings.Fields(string(contents))
termmap, err := getTerminalMap()
terminal := ""
if err == nil {
t, err := strconv.ParseUint(fields[6], 10, 64)
if err != nil {
return "", 0, nil, 0, 0, err
}
terminal = termmap[t]
}
ppid, err := strconv.ParseInt(fields[3], 10, 32)
if err != nil {
return "", 0, nil, 0, 0, err
}
utime, err := strconv.ParseFloat(fields[13], 64)
if err != nil {
return "", 0, nil, 0, 0, err
}
stime, err := strconv.ParseFloat(fields[14], 64)
if err != nil {
return "", 0, nil, 0, 0, err
}
cpuTimes := &cpu.CPUTimesStat{
CPU: "cpu",
User: float64(utime / ClockTicks),
System: float64(stime / ClockTicks),
}
bootTime, _ := host.BootTime()
t, err := strconv.ParseUint(fields[21], 10, 64)
if err != nil {
return "", 0, nil, 0, 0, err
}
ctime := (t / uint64(ClockTicks)) + uint64(bootTime)
createTime := int64(ctime * 1000)
// p.Nice = mustParseInt32(fields[18])
// use syscall instead of parse Stat file
snice, _ := syscall.Getpriority(PrioProcess, int(pid))
nice := int32(snice) // FIXME: is this true?
return terminal, int32(ppid), cpuTimes, createTime, nice, nil
}
// Get memory info from /proc/(pid)/statm
func (p *Process) fillFromStatm() (*MemoryInfoStat, *MemoryInfoExStat, error) {
pid := p.Pid
memPath := common.HostProc(strconv.Itoa(int(pid)), "statm")
contents, err := ioutil.ReadFile(memPath)
if err != nil {
return nil, nil, err
}
fields := strings.Split(string(contents), " ")
vms, err := strconv.ParseUint(fields[0], 10, 64)
if err != nil {
return nil, nil, err
}
rss, err := strconv.ParseUint(fields[1], 10, 64)
if err != nil {
return nil, nil, err
}
memInfo := &MemoryInfoStat{
RSS: rss * PageSize,
VMS: vms * PageSize,
}
shared, err := strconv.ParseUint(fields[2], 10, 64)
if err != nil {
return nil, nil, err
}
text, err := strconv.ParseUint(fields[3], 10, 64)
if err != nil {
return nil, nil, err
}
lib, err := strconv.ParseUint(fields[4], 10, 64)
if err != nil {
return nil, nil, err
}
dirty, err := strconv.ParseUint(fields[5], 10, 64)
if err != nil {
return nil, nil, err
}
memInfoEx := &MemoryInfoExStat{
RSS: rss * PageSize,
VMS: vms * PageSize,
Shared: shared * PageSize,
Text: text * PageSize,
Lib: lib * PageSize,
Dirty: dirty * PageSize,
}
return memInfo, memInfoEx, nil
}
// Get cmdline from /proc/(pid)/cmdline
func (p *Process) fillFromCmdline() (string, error) {
pid := p.Pid
cmdPath := common.HostProc(strconv.Itoa(int(pid)), "cmdline")
cmdline, err := ioutil.ReadFile(cmdPath)
if err != nil {
return "", err
}
ret := strings.FieldsFunc(string(cmdline), func(r rune) bool {
if r == '\u0000' {
return true
}
return false
})
return strings.Join(ret, " "), nil
}
// BootTime returns the system boot time expressed in seconds since the epoch.
func BootTime() (uint64, error) {
filename := common.HostProc("stat")
lines, err := common.ReadLines(filename)
if err != nil {
return 0, err
}
for _, line := range lines {
if strings.HasPrefix(line, "btime") {
f := strings.Fields(line)
if len(f) != 2 {
return 0, fmt.Errorf("wrong btime format")
}
b, err := strconv.ParseInt(f[1], 10, 64)
if err != nil {
return 0, err
}
return uint64(b), nil
}
}
return 0, fmt.Errorf("could not find btime")
}
// Get IO status from /proc/(pid)/io
func (p *Process) fillFromIO() (*IOCountersStat, error) {
pid := p.Pid
ioPath := common.HostProc(strconv.Itoa(int(pid)), "io")
ioline, err := ioutil.ReadFile(ioPath)
if err != nil {
return nil, err
}
lines := strings.Split(string(ioline), "\n")
ret := &IOCountersStat{}
for _, line := range lines {
field := strings.Fields(line)
if len(field) < 2 {
continue
}
t, err := strconv.ParseUint(field[1], 10, 64)
if err != nil {
return nil, err
}
param := field[0]
if strings.HasSuffix(param, ":") {
param = param[:len(param)-1]
}
switch param {
case "syscr":
ret.ReadCount = t
case "syscw":
ret.WriteCount = t
case "read_bytes":
ret.ReadBytes = t
case "write_bytes":
ret.WriteBytes = t
}
}
return ret, nil
}
func Pids() ([]int32, error) {
var ret []int32
d, err := os.Open(common.HostProc())
if err != nil {
return nil, err
}
defer d.Close()
fnames, err := d.Readdirnames(-1)
if err != nil {
return nil, err
}
for _, fname := range fnames {
pid, err := strconv.ParseInt(fname, 10, 32)
if err != nil {
// if not numeric name, just skip
continue
}
ret = append(ret, int32(pid))
}
return ret, nil
}
// NetIOCounters returnes network I/O statistics for every network
// interface installed on the system. If pernic argument is false,
// return only sum of all information (which name is 'all'). If true,
// every network interface installed on the system is returned
// separately.
func NetIOCounters(pernic bool) ([]NetIOCountersStat, error) {
filename := common.HostProc("net/dev")
lines, err := common.ReadLines(filename)
if err != nil {
return nil, err
}
statlen := len(lines) - 1
ret := make([]NetIOCountersStat, 0, statlen)
for _, line := range lines[2:] {
parts := strings.SplitN(line, ":", 2)
if len(parts) != 2 {
continue
}
interfaceName := strings.TrimSpace(parts[0])
if interfaceName == "" {
continue
}
fields := strings.Fields(strings.TrimSpace(parts[1]))
bytesRecv, err := strconv.ParseUint(fields[0], 10, 64)
if err != nil {
return ret, err
}
packetsRecv, err := strconv.ParseUint(fields[1], 10, 64)
if err != nil {
return ret, err
}
errIn, err := strconv.ParseUint(fields[2], 10, 64)
if err != nil {
return ret, err
}
dropIn, err := strconv.ParseUint(fields[3], 10, 64)
if err != nil {
return ret, err
}
bytesSent, err := strconv.ParseUint(fields[8], 10, 64)
if err != nil {
return ret, err
}
packetsSent, err := strconv.ParseUint(fields[9], 10, 64)
if err != nil {
return ret, err
}
errOut, err := strconv.ParseUint(fields[10], 10, 64)
if err != nil {
return ret, err
}
dropOut, err := strconv.ParseUint(fields[13], 10, 64)
if err != nil {
return ret, err
}
nic := NetIOCountersStat{
Name: interfaceName,
BytesRecv: bytesRecv,
PacketsRecv: packetsRecv,
Errin: errIn,
Dropin: dropIn,
BytesSent: bytesSent,
PacketsSent: packetsSent,
Errout: errOut,
Dropout: dropOut,
}
ret = append(ret, nic)
}
if pernic == false {
return getNetIOCountersAll(ret)
}
return ret, nil
}
func GetVirtualization() (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
}
// Get various status from /proc/(pid)/status
func (p *Process) fillFromStatus() error {
pid := p.Pid
statPath := common.HostProc(strconv.Itoa(int(pid)), "status")
contents, err := ioutil.ReadFile(statPath)
if err != nil {
return err
}
lines := strings.Split(string(contents), "\n")
p.numCtxSwitches = &NumCtxSwitchesStat{}
p.memInfo = &MemoryInfoStat{}
for _, line := range lines {
tabParts := strings.SplitN(line, "\t", 2)
if len(tabParts) < 2 {
continue
}
value := tabParts[1]
switch strings.TrimRight(tabParts[0], ":") {
case "Name":
p.name = strings.Trim(value, " \t")
case "State":
// get between "(" and ")"
s := strings.Index(value, "(") + 1
e := strings.Index(value, ")")
p.status = value[s:e]
case "Uid":
p.uids = make([]int32, 0, 4)
for _, i := range strings.Split(value, "\t") {
v, err := strconv.ParseInt(i, 10, 32)
if err != nil {
return err
}
p.uids = append(p.uids, int32(v))
}
case "Gid":
p.gids = make([]int32, 0, 4)
for _, i := range strings.Split(value, "\t") {
v, err := strconv.ParseInt(i, 10, 32)
if err != nil {
return err
}
p.gids = append(p.gids, int32(v))
}
case "Threads":
v, err := strconv.ParseInt(value, 10, 32)
if err != nil {
return err
}
p.numThreads = int32(v)
case "voluntary_ctxt_switches":
v, err := strconv.ParseInt(value, 10, 64)
if err != nil {
return err
}
p.numCtxSwitches.Voluntary = v
case "nonvoluntary_ctxt_switches":
v, err := strconv.ParseInt(value, 10, 64)
if err != nil {
return err
}
p.numCtxSwitches.Involuntary = v
case "VmRSS":
value := strings.Trim(value, " kB") // remove last "kB"
v, err := strconv.ParseUint(value, 10, 64)
if err != nil {
return err
}
p.memInfo.RSS = v * 1024
case "VmSize":
value := strings.Trim(value, " kB") // remove last "kB"
v, err := strconv.ParseUint(value, 10, 64)
if err != nil {
return err
}
p.memInfo.VMS = v * 1024
case "VmSwap":
value := strings.Trim(value, " kB") // remove last "kB"
v, err := strconv.ParseUint(value, 10, 64)
if err != nil {
return err
}
p.memInfo.Swap = v * 1024
}
}
return nil
}
// MemoryMaps get memory maps from /proc/(pid)/smaps
func (p *Process) MemoryMaps(grouped bool) (*[]MemoryMapsStat, error) {
pid := p.Pid
var ret []MemoryMapsStat
smapsPath := common.HostProc(strconv.Itoa(int(pid)), "smaps")
contents, err := ioutil.ReadFile(smapsPath)
if err != nil {
return nil, err
}
lines := strings.Split(string(contents), "\n")
// function of parsing a block
getBlock := func(first_line []string, block []string) (MemoryMapsStat, error) {
m := MemoryMapsStat{}
m.Path = first_line[len(first_line)-1]
for _, line := range block {
if strings.Contains(line, "VmFlags") {
continue
}
field := strings.Split(line, ":")
if len(field) < 2 {
continue
}
v := strings.Trim(field[1], " kB") // remove last "kB"
t, err := strconv.ParseUint(v, 10, 64)
if err != nil {
return m, err
}
switch field[0] {
case "Size":
m.Size = t
case "Rss":
m.Rss = t
case "Pss":
m.Pss = t
case "Shared_Clean":
m.SharedClean = t
case "Shared_Dirty":
m.SharedDirty = t
case "Private_Clean":
m.PrivateClean = t
case "Private_Dirty":
m.PrivateDirty = t
case "Referenced":
m.Referenced = t
case "Anonymous":
m.Anonymous = t
case "Swap":
m.Swap = t
}
}
return m, nil
}
blocks := make([]string, 16)
for _, line := range lines {
field := strings.Split(line, " ")
if strings.HasSuffix(field[0], ":") == false {
// new block section
if len(blocks) > 0 {
g, err := getBlock(field, blocks)
if err != nil {
return &ret, err
}
ret = append(ret, g)
}
// starts new block
blocks = make([]string, 16)
} else {
blocks = append(blocks, line)
}
}
return &ret, nil
}