Vendor psutils and remove neko

plugins/system/ps/process/binary.go

@@ -0,0 +1,634 @@
+// Copyright 2009 The Go Authors.  All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Package binary implements simple translation between numbers and byte
+// sequences and encoding and decoding of varints.
+//
+// Numbers are translated by reading and writing fixed-size values.
+// A fixed-size value is either a fixed-size arithmetic
+// type (int8, uint8, int16, float32, complex64, ...)
+// or an array or struct containing only fixed-size values.
+//
+// The varint functions encode and decode single integer values using
+// a variable-length encoding; smaller values require fewer bytes.
+// For a specification, see
+// http://code.google.com/apis/protocolbuffers/docs/encoding.html.
+//
+// This package favors simplicity over efficiency. Clients that require
+// high-performance serialization, especially for large data structures,
+// should look at more advanced solutions such as the encoding/gob
+// package or protocol buffers.
+package process
+
+import (
+	"errors"
+	"io"
+	"math"
+	"reflect"
+)
+
+// A ByteOrder specifies how to convert byte sequences into
+// 16-, 32-, or 64-bit unsigned integers.
+type ByteOrder interface {
+	Uint16([]byte) uint16
+	Uint32([]byte) uint32
+	Uint64([]byte) uint64
+	PutUint16([]byte, uint16)
+	PutUint32([]byte, uint32)
+	PutUint64([]byte, uint64)
+	String() string
+}
+
+// LittleEndian is the little-endian implementation of ByteOrder.
+var LittleEndian littleEndian
+
+// BigEndian is the big-endian implementation of ByteOrder.
+var BigEndian bigEndian
+
+type littleEndian struct{}
+
+func (littleEndian) Uint16(b []byte) uint16 { return uint16(b[0]) | uint16(b[1])<<8 }
+
+func (littleEndian) PutUint16(b []byte, v uint16) {
+	b[0] = byte(v)
+	b[1] = byte(v >> 8)
+}
+
+func (littleEndian) Uint32(b []byte) uint32 {
+	return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
+}
+
+func (littleEndian) PutUint32(b []byte, v uint32) {
+	b[0] = byte(v)
+	b[1] = byte(v >> 8)
+	b[2] = byte(v >> 16)
+	b[3] = byte(v >> 24)
+}
+
+func (littleEndian) Uint64(b []byte) uint64 {
+	return uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 |
+		uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56
+}
+
+func (littleEndian) PutUint64(b []byte, v uint64) {
+	b[0] = byte(v)
+	b[1] = byte(v >> 8)
+	b[2] = byte(v >> 16)
+	b[3] = byte(v >> 24)
+	b[4] = byte(v >> 32)
+	b[5] = byte(v >> 40)
+	b[6] = byte(v >> 48)
+	b[7] = byte(v >> 56)
+}
+
+func (littleEndian) String() string { return "LittleEndian" }
+
+func (littleEndian) GoString() string { return "binary.LittleEndian" }
+
+type bigEndian struct{}
+
+func (bigEndian) Uint16(b []byte) uint16 { return uint16(b[1]) | uint16(b[0])<<8 }
+
+func (bigEndian) PutUint16(b []byte, v uint16) {
+	b[0] = byte(v >> 8)
+	b[1] = byte(v)
+}
+
+func (bigEndian) Uint32(b []byte) uint32 {
+	return uint32(b[3]) | uint32(b[2])<<8 | uint32(b[1])<<16 | uint32(b[0])<<24
+}
+
+func (bigEndian) PutUint32(b []byte, v uint32) {
+	b[0] = byte(v >> 24)
+	b[1] = byte(v >> 16)
+	b[2] = byte(v >> 8)
+	b[3] = byte(v)
+}
+
+func (bigEndian) Uint64(b []byte) uint64 {
+	return uint64(b[7]) | uint64(b[6])<<8 | uint64(b[5])<<16 | uint64(b[4])<<24 |
+		uint64(b[3])<<32 | uint64(b[2])<<40 | uint64(b[1])<<48 | uint64(b[0])<<56
+}
+
+func (bigEndian) PutUint64(b []byte, v uint64) {
+	b[0] = byte(v >> 56)
+	b[1] = byte(v >> 48)
+	b[2] = byte(v >> 40)
+	b[3] = byte(v >> 32)
+	b[4] = byte(v >> 24)
+	b[5] = byte(v >> 16)
+	b[6] = byte(v >> 8)
+	b[7] = byte(v)
+}
+
+func (bigEndian) String() string { return "BigEndian" }
+
+func (bigEndian) GoString() string { return "binary.BigEndian" }
+
+// Read reads structured binary data from r into data.
+// Data must be a pointer to a fixed-size value or a slice
+// of fixed-size values.
+// Bytes read from r are decoded using the specified byte order
+// and written to successive fields of the data.
+// When reading into structs, the field data for fields with
+// blank (_) field names is skipped; i.e., blank field names
+// may be used for padding.
+// When reading into a struct, all non-blank fields must be exported.
+func Read(r io.Reader, order ByteOrder, data interface{}) error {
+	// Fast path for basic types and slices.
+	if n := intDataSize(data); n != 0 {
+		var b [8]byte
+		var bs []byte
+		if n > len(b) {
+			bs = make([]byte, n)
+		} else {
+			bs = b[:n]
+		}
+		if _, err := io.ReadFull(r, bs); err != nil {
+			return err
+		}
+		switch data := data.(type) {
+		case *int8:
+			*data = int8(b[0])
+		case *uint8:
+			*data = b[0]
+		case *int16:
+			*data = int16(order.Uint16(bs))
+		case *uint16:
+			*data = order.Uint16(bs)
+		case *int32:
+			*data = int32(order.Uint32(bs))
+		case *uint32:
+			*data = order.Uint32(bs)
+		case *int64:
+			*data = int64(order.Uint64(bs))
+		case *uint64:
+			*data = order.Uint64(bs)
+		case []int8:
+			for i, x := range bs { // Easier to loop over the input for 8-bit values.
+				data[i] = int8(x)
+			}
+		case []uint8:
+			copy(data, bs)
+		case []int16:
+			for i := range data {
+				data[i] = int16(order.Uint16(bs[2*i:]))
+			}
+		case []uint16:
+			for i := range data {
+				data[i] = order.Uint16(bs[2*i:])
+			}
+		case []int32:
+			for i := range data {
+				data[i] = int32(order.Uint32(bs[4*i:]))
+			}
+		case []uint32:
+			for i := range data {
+				data[i] = order.Uint32(bs[4*i:])
+			}
+		case []int64:
+			for i := range data {
+				data[i] = int64(order.Uint64(bs[8*i:]))
+			}
+		case []uint64:
+			for i := range data {
+				data[i] = order.Uint64(bs[8*i:])
+			}
+		}
+		return nil
+	}
+
+	// Fallback to reflect-based decoding.
+	v := reflect.ValueOf(data)
+	size := -1
+	switch v.Kind() {
+	case reflect.Ptr:
+		v = v.Elem()
+		size = dataSize(v)
+	case reflect.Slice:
+		size = dataSize(v)
+	}
+	if size < 0 {
+		return errors.New("binary.Read: invalid type " + reflect.TypeOf(data).String())
+	}
+	d := &decoder{order: order, buf: make([]byte, size)}
+	if _, err := io.ReadFull(r, d.buf); err != nil {
+		return err
+	}
+	d.value(v)
+	return nil
+}
+
+// Write writes the binary representation of data into w.
+// Data must be a fixed-size value or a slice of fixed-size
+// values, or a pointer to such data.
+// Bytes written to w are encoded using the specified byte order
+// and read from successive fields of the data.
+// When writing structs, zero values are written for fields
+// with blank (_) field names.
+func Write(w io.Writer, order ByteOrder, data interface{}) error {
+	// Fast path for basic types and slices.
+	if n := intDataSize(data); n != 0 {
+		var b [8]byte
+		var bs []byte
+		if n > len(b) {
+			bs = make([]byte, n)
+		} else {
+			bs = b[:n]
+		}
+		switch v := data.(type) {
+		case *int8:
+			bs = b[:1]
+			b[0] = byte(*v)
+		case int8:
+			bs = b[:1]
+			b[0] = byte(v)
+		case []int8:
+			for i, x := range v {
+				bs[i] = byte(x)
+			}
+		case *uint8:
+			bs = b[:1]
+			b[0] = *v
+		case uint8:
+			bs = b[:1]
+			b[0] = byte(v)
+		case []uint8:
+			bs = v
+		case *int16:
+			bs = b[:2]
+			order.PutUint16(bs, uint16(*v))
+		case int16:
+			bs = b[:2]
+			order.PutUint16(bs, uint16(v))
+		case []int16:
+			for i, x := range v {
+				order.PutUint16(bs[2*i:], uint16(x))
+			}
+		case *uint16:
+			bs = b[:2]
+			order.PutUint16(bs, *v)
+		case uint16:
+			bs = b[:2]
+			order.PutUint16(bs, v)
+		case []uint16:
+			for i, x := range v {
+				order.PutUint16(bs[2*i:], x)
+			}
+		case *int32:
+			bs = b[:4]
+			order.PutUint32(bs, uint32(*v))
+		case int32:
+			bs = b[:4]
+			order.PutUint32(bs, uint32(v))
+		case []int32:
+			for i, x := range v {
+				order.PutUint32(bs[4*i:], uint32(x))
+			}
+		case *uint32:
+			bs = b[:4]
+			order.PutUint32(bs, *v)
+		case uint32:
+			bs = b[:4]
+			order.PutUint32(bs, v)
+		case []uint32:
+			for i, x := range v {
+				order.PutUint32(bs[4*i:], x)
+			}
+		case *int64:
+			bs = b[:8]
+			order.PutUint64(bs, uint64(*v))
+		case int64:
+			bs = b[:8]
+			order.PutUint64(bs, uint64(v))
+		case []int64:
+			for i, x := range v {
+				order.PutUint64(bs[8*i:], uint64(x))
+			}
+		case *uint64:
+			bs = b[:8]
+			order.PutUint64(bs, *v)
+		case uint64:
+			bs = b[:8]
+			order.PutUint64(bs, v)
+		case []uint64:
+			for i, x := range v {
+				order.PutUint64(bs[8*i:], x)
+			}
+		}
+		_, err := w.Write(bs)
+		return err
+	}
+
+	// Fallback to reflect-based encoding.
+	v := reflect.Indirect(reflect.ValueOf(data))
+	size := dataSize(v)
+	if size < 0 {
+		return errors.New("binary.Write: invalid type " + reflect.TypeOf(data).String())
+	}
+	buf := make([]byte, size)
+	e := &encoder{order: order, buf: buf}
+	e.value(v)
+	_, err := w.Write(buf)
+	return err
+}
+
+// Size returns how many bytes Write would generate to encode the value v, which
+// must be a fixed-size value or a slice of fixed-size values, or a pointer to such data.
+// If v is neither of these, Size returns -1.
+func Size(v interface{}) int {
+	return dataSize(reflect.Indirect(reflect.ValueOf(v)))
+}
+
+// dataSize returns the number of bytes the actual data represented by v occupies in memory.
+// For compound structures, it sums the sizes of the elements. Thus, for instance, for a slice
+// it returns the length of the slice times the element size and does not count the memory
+// occupied by the header. If the type of v is not acceptable, dataSize returns -1.
+func dataSize(v reflect.Value) int {
+	if v.Kind() == reflect.Slice {
+		if s := sizeof(v.Type().Elem()); s >= 0 {
+			return s * v.Len()
+		}
+		return -1
+	}
+	return sizeof(v.Type())
+}
+
+// sizeof returns the size >= 0 of variables for the given type or -1 if the type is not acceptable.
+func sizeof(t reflect.Type) int {
+	switch t.Kind() {
+	case reflect.Array:
+		if s := sizeof(t.Elem()); s >= 0 {
+			return s * t.Len()
+		}
+
+	case reflect.Struct:
+		sum := 0
+		for i, n := 0, t.NumField(); i < n; i++ {
+			s := sizeof(t.Field(i).Type)
+			if s < 0 {
+				return -1
+			}
+			sum += s
+		}
+		return sum
+
+	case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64,
+		reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64,
+		reflect.Float32, reflect.Float64, reflect.Complex64, reflect.Complex128, reflect.Ptr:
+		return int(t.Size())
+	}
+
+	return -1
+}
+
+type coder struct {
+	order ByteOrder
+	buf   []byte
+}
+
+type decoder coder
+type encoder coder
+
+func (d *decoder) uint8() uint8 {
+	x := d.buf[0]
+	d.buf = d.buf[1:]
+	return x
+}
+
+func (e *encoder) uint8(x uint8) {
+	e.buf[0] = x
+	e.buf = e.buf[1:]
+}
+
+func (d *decoder) uint16() uint16 {
+	x := d.order.Uint16(d.buf[0:2])
+	d.buf = d.buf[2:]
+	return x
+}
+
+func (e *encoder) uint16(x uint16) {
+	e.order.PutUint16(e.buf[0:2], x)
+	e.buf = e.buf[2:]
+}
+
+func (d *decoder) uint32() uint32 {
+	x := d.order.Uint32(d.buf[0:4])
+	d.buf = d.buf[4:]
+	return x
+}
+
+func (e *encoder) uint32(x uint32) {
+	e.order.PutUint32(e.buf[0:4], x)
+	e.buf = e.buf[4:]
+}
+
+func (d *decoder) uint64() uint64 {
+	x := d.order.Uint64(d.buf[0:8])
+	d.buf = d.buf[8:]
+	return x
+}
+
+func (e *encoder) uint64(x uint64) {
+	e.order.PutUint64(e.buf[0:8], x)
+	e.buf = e.buf[8:]
+}
+
+func (d *decoder) int8() int8 { return int8(d.uint8()) }
+
+func (e *encoder) int8(x int8) { e.uint8(uint8(x)) }
+
+func (d *decoder) int16() int16 { return int16(d.uint16()) }
+
+func (e *encoder) int16(x int16) { e.uint16(uint16(x)) }
+
+func (d *decoder) int32() int32 { return int32(d.uint32()) }
+
+func (e *encoder) int32(x int32) { e.uint32(uint32(x)) }
+
+func (d *decoder) int64() int64 { return int64(d.uint64()) }
+
+func (e *encoder) int64(x int64) { e.uint64(uint64(x)) }
+
+func (d *decoder) value(v reflect.Value) {
+	switch v.Kind() {
+	case reflect.Array:
+		l := v.Len()
+		for i := 0; i < l; i++ {
+			d.value(v.Index(i))
+		}
+
+	case reflect.Struct:
+		t := v.Type()
+		l := v.NumField()
+		for i := 0; i < l; i++ {
+			// Note: Calling v.CanSet() below is an optimization.
+			// It would be sufficient to check the field name,
+			// but creating the StructField info for each field is
+			// costly (run "go test -bench=ReadStruct" and compare
+			// results when making changes to this code).
+			if v := v.Field(i); v.CanSet() || t.Field(i).Name != "_" {
+				d.value(v)
+			} else {
+				d.skip(v)
+			}
+		}
+
+	case reflect.Slice:
+		l := v.Len()
+		for i := 0; i < l; i++ {
+			d.value(v.Index(i))
+		}
+
+	case reflect.Int8:
+		v.SetInt(int64(d.int8()))
+	case reflect.Int16:
+		v.SetInt(int64(d.int16()))
+	case reflect.Int32:
+		v.SetInt(int64(d.int32()))
+	case reflect.Int64:
+		v.SetInt(d.int64())
+
+	case reflect.Uint8:
+		v.SetUint(uint64(d.uint8()))
+	case reflect.Uint16:
+		v.SetUint(uint64(d.uint16()))
+	case reflect.Uint32:
+		v.SetUint(uint64(d.uint32()))
+	case reflect.Uint64:
+		v.SetUint(d.uint64())
+
+	case reflect.Float32:
+		v.SetFloat(float64(math.Float32frombits(d.uint32())))
+	case reflect.Float64:
+		v.SetFloat(math.Float64frombits(d.uint64()))
+
+	case reflect.Complex64:
+		v.SetComplex(complex(
+			float64(math.Float32frombits(d.uint32())),
+			float64(math.Float32frombits(d.uint32())),
+		))
+	case reflect.Complex128:
+		v.SetComplex(complex(
+			math.Float64frombits(d.uint64()),
+			math.Float64frombits(d.uint64()),
+		))
+	}
+}
+
+func (e *encoder) value(v reflect.Value) {
+	switch v.Kind() {
+	case reflect.Array:
+		l := v.Len()
+		for i := 0; i < l; i++ {
+			e.value(v.Index(i))
+		}
+
+	case reflect.Struct:
+		t := v.Type()
+		l := v.NumField()
+		for i := 0; i < l; i++ {
+			// see comment for corresponding code in decoder.value()
+			if v := v.Field(i); v.CanSet() || t.Field(i).Name != "_" {
+				e.value(v)
+			} else {
+				e.skip(v)
+			}
+		}
+
+	case reflect.Slice:
+		l := v.Len()
+		for i := 0; i < l; i++ {
+			e.value(v.Index(i))
+		}
+
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		switch v.Type().Kind() {
+		case reflect.Int8:
+			e.int8(int8(v.Int()))
+		case reflect.Int16:
+			e.int16(int16(v.Int()))
+		case reflect.Int32:
+			e.int32(int32(v.Int()))
+		case reflect.Int64:
+			e.int64(v.Int())
+		}
+
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		switch v.Type().Kind() {
+		case reflect.Uint8:
+			e.uint8(uint8(v.Uint()))
+		case reflect.Uint16:
+			e.uint16(uint16(v.Uint()))
+		case reflect.Uint32:
+			e.uint32(uint32(v.Uint()))
+		case reflect.Uint64:
+			e.uint64(v.Uint())
+		}
+
+	case reflect.Float32, reflect.Float64:
+		switch v.Type().Kind() {
+		case reflect.Float32:
+			e.uint32(math.Float32bits(float32(v.Float())))
+		case reflect.Float64:
+			e.uint64(math.Float64bits(v.Float()))
+		}
+
+	case reflect.Complex64, reflect.Complex128:
+		switch v.Type().Kind() {
+		case reflect.Complex64:
+			x := v.Complex()
+			e.uint32(math.Float32bits(float32(real(x))))
+			e.uint32(math.Float32bits(float32(imag(x))))
+		case reflect.Complex128:
+			x := v.Complex()
+			e.uint64(math.Float64bits(real(x)))
+			e.uint64(math.Float64bits(imag(x)))
+		}
+	}
+}
+
+func (d *decoder) skip(v reflect.Value) {
+	d.buf = d.buf[dataSize(v):]
+}
+
+func (e *encoder) skip(v reflect.Value) {
+	n := dataSize(v)
+	for i := range e.buf[0:n] {
+		e.buf[i] = 0
+	}
+	e.buf = e.buf[n:]
+}
+
+// intDataSize returns the size of the data required to represent the data when encoded.
+// It returns zero if the type cannot be implemented by the fast path in Read or Write.
+func intDataSize(data interface{}) int {
+	switch data := data.(type) {
+	case int8, *int8, *uint8:
+		return 1
+	case []int8:
+		return len(data)
+	case []uint8:
+		return len(data)
+	case int16, *int16, *uint16:
+		return 2
+	case []int16:
+		return 2 * len(data)
+	case []uint16:
+		return 2 * len(data)
+	case int32, *int32, *uint32:
+		return 4
+	case []int32:
+		return 4 * len(data)
+	case []uint32:
+		return 4 * len(data)
+	case int64, *int64, *uint64:
+		return 8
+	case []int64:
+		return 8 * len(data)
+	case []uint64:
+		return 8 * len(data)
+	}
+	return 0
+}

plugins/system/ps/process/process.go

@@ -0,0 +1,142 @@
+package process
+
+import (
+	"encoding/json"
+	"runtime"
+	"time"
+
+	cpu "github.com/shirou/gopsutil/cpu"
+)
+
+type Process struct {
+	Pid            int32 `json:"pid"`
+	name           string
+	status         string
+	numCtxSwitches *NumCtxSwitchesStat
+	uids           []int32
+	gids           []int32
+	numThreads     int32
+	memInfo        *MemoryInfoStat
+
+	lastCPUTimes *cpu.CPUTimesStat
+	lastCPUTime  time.Time
+}
+
+type OpenFilesStat struct {
+	Path string `json:"path"`
+	Fd   uint64 `json:"fd"`
+}
+
+type MemoryInfoStat struct {
+	RSS  uint64 `json:"rss"`  // bytes
+	VMS  uint64 `json:"vms"`  // bytes
+	Swap uint64 `json:"swap"` // bytes
+}
+
+type RlimitStat struct {
+	Resource int32 `json:"resource"`
+	Soft     int32 `json:"soft"`
+	Hard     int32 `json:"hard"`
+}
+
+type IOCountersStat struct {
+	ReadCount  uint64 `json:"read_count"`
+	WriteCount uint64 `json:"write_count"`
+	ReadBytes  uint64 `json:"read_bytes"`
+	WriteBytes uint64 `json:"write_bytes"`
+}
+
+type NumCtxSwitchesStat struct {
+	Voluntary   int64 `json:"voluntary"`
+	Involuntary int64 `json:"involuntary"`
+}
+
+func (p Process) String() string {
+	s, _ := json.Marshal(p)
+	return string(s)
+}
+
+func (o OpenFilesStat) String() string {
+	s, _ := json.Marshal(o)
+	return string(s)
+}
+
+func (m MemoryInfoStat) String() string {
+	s, _ := json.Marshal(m)
+	return string(s)
+}
+
+func (r RlimitStat) String() string {
+	s, _ := json.Marshal(r)
+	return string(s)
+}
+
+func (i IOCountersStat) String() string {
+	s, _ := json.Marshal(i)
+	return string(s)
+}
+
+func (p NumCtxSwitchesStat) String() string {
+	s, _ := json.Marshal(p)
+	return string(s)
+}
+
+func PidExists(pid int32) (bool, error) {
+	pids, err := Pids()
+	if err != nil {
+		return false, err
+	}
+
+	for _, i := range pids {
+		if i == pid {
+			return true, err
+		}
+	}
+
+	return false, err
+}
+
+// If interval is 0, return difference from last call(non-blocking).
+// If interval > 0, wait interval sec and return diffrence between start and end.
+func (p *Process) CPUPercent(interval time.Duration) (float64, error) {
+	numcpu := runtime.NumCPU()
+	calculate := func(t1, t2 *cpu.CPUTimesStat, delta float64) float64 {
+		if delta == 0 {
+			return 0
+		}
+		delta_proc := (t2.User - t1.User) + (t2.System - t1.System)
+		overall_percent := ((delta_proc / delta) * 100) * float64(numcpu)
+		return overall_percent
+	}
+
+	cpuTimes, err := p.CPUTimes()
+	if err != nil {
+		return 0, err
+	}
+
+	if interval > 0 {
+		p.lastCPUTimes = cpuTimes
+		p.lastCPUTime = time.Now()
+		time.Sleep(interval)
+		cpuTimes, err = p.CPUTimes()
+		if err != nil {
+			return 0, err
+		}
+	} else {
+		if p.lastCPUTimes == nil {
+			// invoked first time
+			p.lastCPUTimes, err = p.CPUTimes()
+			if err != nil {
+				return 0, err
+			}
+			p.lastCPUTime = time.Now()
+			return 0, nil
+		}
+	}
+
+	delta := (time.Now().Sub(p.lastCPUTime).Seconds()) * float64(numcpu)
+	ret := calculate(p.lastCPUTimes, cpuTimes, float64(delta))
+	p.lastCPUTimes = cpuTimes
+	p.lastCPUTime = time.Now()
+	return ret, nil
+}

plugins/system/ps/process/process_darwin.go

@@ -0,0 +1,359 @@
+// +build darwin
+
+package process
+
+import (
+	"bytes"
+	"os/exec"
+	"strconv"
+	"strings"
+	"syscall"
+	"unsafe"
+
+	common "github.com/shirou/gopsutil/common"
+	cpu "github.com/shirou/gopsutil/cpu"
+	net "github.com/shirou/gopsutil/net"
+)
+
+// copied from sys/sysctl.h
+const (
+	CTLKern          = 1  // "high kernel": proc, limits
+	KernProc         = 14 // struct: process entries
+	KernProcPID      = 1  // by process id
+	KernProcProc     = 8  // only return procs
+	KernProcAll      = 0  // everything
+	KernProcPathname = 12 // path to executable
+)
+
+type _Ctype_struct___0 struct {
+	Pad uint64
+}
+
+// MemoryInfoExStat is different between OSes
+type MemoryInfoExStat struct {
+}
+
+type MemoryMapsStat struct {
+}
+
+func Pids() ([]int32, error) {
+	var ret []int32
+
+	pids, err := callPs("pid", 0)
+	if err != nil {
+		return ret, err
+	}
+
+	for _, pid := range pids {
+		v, err := strconv.Atoi(pid[0])
+		if err != nil {
+			return ret, err
+		}
+		ret = append(ret, int32(v))
+	}
+
+	return ret, nil
+}
+
+func (p *Process) Ppid() (int32, error) {
+	r, err := callPs("ppid", p.Pid)
+	v, err := strconv.Atoi(r[0][0])
+	if err != nil {
+		return 0, err
+	}
+
+	return int32(v), err
+}
+func (p *Process) Name() (string, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return "", err
+	}
+
+	return common.IntToString(k.Proc.P_comm[:]), nil
+}
+func (p *Process) Exe() (string, error) {
+	return "", common.NotImplementedError
+}
+func (p *Process) Cmdline() (string, error) {
+	r, err := callPs("command", p.Pid)
+	if err != nil {
+		return "", err
+	}
+	return strings.Join(r[0], " "), err
+}
+func (p *Process) CreateTime() (int64, error) {
+	return 0, common.NotImplementedError
+}
+func (p *Process) Cwd() (string, error) {
+	return "", common.NotImplementedError
+}
+func (p *Process) Parent() (*Process, error) {
+	return p, common.NotImplementedError
+}
+func (p *Process) Status() (string, error) {
+	r, err := callPs("state", p.Pid)
+	if err != nil {
+		return "", err
+	}
+
+	return r[0][0], err
+}
+func (p *Process) Uids() ([]int32, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return nil, err
+	}
+
+	uids := make([]int32, 0, 3)
+
+	uids = append(uids, int32(k.Eproc.Pcred.P_ruid), int32(k.Eproc.Ucred.Uid), int32(k.Eproc.Pcred.P_svuid))
+
+	return uids, nil
+}
+func (p *Process) Gids() ([]int32, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return nil, err
+	}
+
+	gids := make([]int32, 0, 3)
+	gids = append(gids, int32(k.Eproc.Pcred.P_rgid), int32(k.Eproc.Ucred.Ngroups), int32(k.Eproc.Pcred.P_svgid))
+
+	return gids, nil
+}
+func (p *Process) Terminal() (string, error) {
+	return "", common.NotImplementedError
+	/*
+		k, err := p.getKProc()
+		if err != nil {
+			return "", err
+		}
+
+		ttyNr := uint64(k.Eproc.Tdev)
+		termmap, err := getTerminalMap()
+		if err != nil {
+			return "", err
+		}
+
+		return termmap[ttyNr], nil
+	*/
+}
+func (p *Process) Nice() (int32, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return 0, err
+	}
+	return int32(k.Proc.P_nice), nil
+}
+func (p *Process) IOnice() (int32, error) {
+	return 0, common.NotImplementedError
+}
+func (p *Process) Rlimit() ([]RlimitStat, error) {
+	var rlimit []RlimitStat
+	return rlimit, common.NotImplementedError
+}
+func (p *Process) IOCounters() (*IOCountersStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) NumCtxSwitches() (*NumCtxSwitchesStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) NumFDs() (int32, error) {
+	return 0, common.NotImplementedError
+}
+func (p *Process) NumThreads() (int32, error) {
+	return 0, common.NotImplementedError
+
+	/*
+		k, err := p.getKProc()
+		if err != nil {
+			return 0, err
+		}
+
+			return k.KiNumthreads, nil
+	*/
+}
+func (p *Process) Threads() (map[string]string, error) {
+	ret := make(map[string]string, 0)
+	return ret, common.NotImplementedError
+}
+func (p *Process) CPUTimes() (*cpu.CPUTimesStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) CPUAffinity() ([]int32, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) MemoryInfo() (*MemoryInfoStat, error) {
+	r, err := callPs("rss,vsize,pagein", p.Pid)
+	if err != nil {
+		return nil, err
+	}
+	rss, err := strconv.Atoi(r[0][0])
+	if err != nil {
+		return nil, err
+	}
+	vms, err := strconv.Atoi(r[0][1])
+	if err != nil {
+		return nil, err
+	}
+	pagein, err := strconv.Atoi(r[0][2])
+	if err != nil {
+		return nil, err
+	}
+
+	ret := &MemoryInfoStat{
+		RSS:  uint64(rss),
+		VMS:  uint64(vms),
+		Swap: uint64(pagein),
+	}
+
+	return ret, nil
+}
+func (p *Process) MemoryInfoEx() (*MemoryInfoExStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) MemoryPercent() (float32, error) {
+	return 0, common.NotImplementedError
+}
+
+func (p *Process) Children() ([]*Process, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) OpenFiles() ([]OpenFilesStat, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) Connections() ([]net.NetConnectionStat, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) IsRunning() (bool, error) {
+	return true, common.NotImplementedError
+}
+func (p *Process) MemoryMaps(grouped bool) (*[]MemoryMapsStat, error) {
+	var ret []MemoryMapsStat
+	return &ret, common.NotImplementedError
+}
+
+func copyParams(k *KinfoProc, p *Process) error {
+
+	return nil
+}
+
+func processes() ([]Process, error) {
+	results := make([]Process, 0, 50)
+
+	mib := []int32{CTLKern, KernProc, KernProcAll, 0}
+	buf, length, err := common.CallSyscall(mib)
+	if err != nil {
+		return results, err
+	}
+
+	// get kinfo_proc size
+	k := KinfoProc{}
+	procinfoLen := int(unsafe.Sizeof(k))
+	count := int(length / uint64(procinfoLen))
+	/*
+		fmt.Println(length, procinfoLen, count)
+		b := buf[0*procinfoLen : 0*procinfoLen+procinfoLen]
+		fmt.Println(b)
+		kk, err := parseKinfoProc(b)
+		fmt.Printf("%#v", kk)
+	*/
+
+	// parse buf to procs
+	for i := 0; i < count; i++ {
+		b := buf[i*procinfoLen : i*procinfoLen+procinfoLen]
+		k, err := parseKinfoProc(b)
+		if err != nil {
+			continue
+		}
+		p, err := NewProcess(int32(k.Proc.P_pid))
+		if err != nil {
+			continue
+		}
+		copyParams(&k, p)
+
+		results = append(results, *p)
+	}
+
+	return results, nil
+}
+
+func parseKinfoProc(buf []byte) (KinfoProc, error) {
+	var k KinfoProc
+	br := bytes.NewReader(buf)
+
+	err := Read(br, LittleEndian, &k)
+	if err != nil {
+		return k, err
+	}
+
+	return k, nil
+}
+
+func (p *Process) getKProc() (*KinfoProc, error) {
+	mib := []int32{CTLKern, KernProc, KernProcPID, p.Pid}
+	procK := KinfoProc{}
+	length := uint64(unsafe.Sizeof(procK))
+	buf := make([]byte, length)
+	_, _, syserr := syscall.Syscall6(
+		syscall.SYS___SYSCTL,
+		uintptr(unsafe.Pointer(&mib[0])),
+		uintptr(len(mib)),
+		uintptr(unsafe.Pointer(&buf[0])),
+		uintptr(unsafe.Pointer(&length)),
+		0,
+		0)
+	if syserr != 0 {
+		return nil, syserr
+	}
+	k, err := parseKinfoProc(buf)
+	if err != nil {
+		return nil, err
+	}
+
+	return &k, nil
+}
+
+func NewProcess(pid int32) (*Process, error) {
+	p := &Process{Pid: pid}
+
+	return p, nil
+}
+
+// call ps command.
+// Return value deletes Header line(you must not input wrong arg).
+// And splited by Space. Caller have responsibility to manage.
+// If passed arg pid is 0, get information from all process.
+func callPs(arg string, pid int32) ([][]string, error) {
+	var cmd []string
+	if pid == 0 { // will get from all processes.
+		cmd = []string{"-x", "-o", arg}
+	} else {
+		cmd = []string{"-x", "-o", arg, "-p", strconv.Itoa(int(pid))}
+	}
+	out, err := exec.Command("/bin/ps", cmd...).Output()
+	if err != nil {
+		return [][]string{}, err
+	}
+	lines := strings.Split(string(out), "\n")
+
+	var ret [][]string
+	for _, l := range lines[1:] {
+		var lr []string
+		for _, r := range strings.Split(l, " ") {
+			if r == "" {
+				continue
+			}
+			lr = append(lr, strings.TrimSpace(r))
+		}
+		if len(lr) != 0 {
+			ret = append(ret, lr)
+		}
+	}
+
+	return ret, nil
+}

plugins/system/ps/process/process_darwin_amd64.go

@@ -0,0 +1,234 @@
+// Created by cgo -godefs - DO NOT EDIT
+// cgo -godefs types_darwin.go
+
+package process
+
+const (
+	sizeofPtr      = 0x8
+	sizeofShort    = 0x2
+	sizeofInt      = 0x4
+	sizeofLong     = 0x8
+	sizeofLongLong = 0x8
+)
+
+type (
+	_C_short     int16
+	_C_int       int32
+	_C_long      int64
+	_C_long_long int64
+)
+
+type Timespec struct {
+	Sec  int64
+	Nsec int64
+}
+
+type Timeval struct {
+	Sec       int64
+	Usec      int32
+	Pad_cgo_0 [4]byte
+}
+
+type Rusage struct {
+	Utime    Timeval
+	Stime    Timeval
+	Maxrss   int64
+	Ixrss    int64
+	Idrss    int64
+	Isrss    int64
+	Minflt   int64
+	Majflt   int64
+	Nswap    int64
+	Inblock  int64
+	Oublock  int64
+	Msgsnd   int64
+	Msgrcv   int64
+	Nsignals int64
+	Nvcsw    int64
+	Nivcsw   int64
+}
+
+type Rlimit struct {
+	Cur uint64
+	Max uint64
+}
+
+type UGid_t uint32
+
+type KinfoProc struct {
+	Proc  ExternProc
+	Eproc Eproc
+}
+
+type Eproc struct {
+	Paddr     *uint64
+	Sess      *Session
+	Pcred     Upcred
+	Ucred     Uucred
+	Pad_cgo_0 [4]byte
+	Vm        Vmspace
+	Ppid      int32
+	Pgid      int32
+	Jobc      int16
+	Pad_cgo_1 [2]byte
+	Tdev      int32
+	Tpgid     int32
+	Pad_cgo_2 [4]byte
+	Tsess     *Session
+	Wmesg     [8]int8
+	Xsize     int32
+	Xrssize   int16
+	Xccount   int16
+	Xswrss    int16
+	Pad_cgo_3 [2]byte
+	Flag      int32
+	Login     [12]int8
+	Spare     [4]int32
+	Pad_cgo_4 [4]byte
+}
+
+type Proc struct{}
+
+type Session struct{}
+
+type ucred struct {
+	Link  _Ctype_struct___0
+	Ref   uint64
+	Posix Posix_cred
+	Label *Label
+	Audit Au_session
+}
+
+type Uucred struct {
+	Ref       int32
+	Uid       uint32
+	Ngroups   int16
+	Pad_cgo_0 [2]byte
+	Groups    [16]uint32
+}
+
+type Upcred struct {
+	Pc_lock   [72]int8
+	Pc_ucred  *ucred
+	P_ruid    uint32
+	P_svuid   uint32
+	P_rgid    uint32
+	P_svgid   uint32
+	P_refcnt  int32
+	Pad_cgo_0 [4]byte
+}
+
+type Vmspace struct {
+	Dummy     int32
+	Pad_cgo_0 [4]byte
+	Dummy2    *int8
+	Dummy3    [5]int32
+	Pad_cgo_1 [4]byte
+	Dummy4    [3]*int8
+}
+
+type Sigacts struct{}
+
+type ExternProc struct {
+	P_un        [16]byte
+	P_vmspace   uint64
+	P_sigacts   uint64
+	Pad_cgo_0   [3]byte
+	P_flag      int32
+	P_stat      int8
+	P_pid       int32
+	P_oppid     int32
+	P_dupfd     int32
+	Pad_cgo_1   [4]byte
+	User_stack  uint64
+	Exit_thread uint64
+	P_debugger  int32
+	Sigwait     int32
+	P_estcpu    uint32
+	P_cpticks   int32
+	P_pctcpu    uint32
+	Pad_cgo_2   [4]byte
+	P_wchan     uint64
+	P_wmesg     uint64
+	P_swtime    uint32
+	P_slptime   uint32
+	P_realtimer Itimerval
+	P_rtime     Timeval
+	P_uticks    uint64
+	P_sticks    uint64
+	P_iticks    uint64
+	P_traceflag int32
+	Pad_cgo_3   [4]byte
+	P_tracep    uint64
+	P_siglist   int32
+	Pad_cgo_4   [4]byte
+	P_textvp    uint64
+	P_holdcnt   int32
+	P_sigmask   uint32
+	P_sigignore uint32
+	P_sigcatch  uint32
+	P_priority  uint8
+	P_usrpri    uint8
+	P_nice      int8
+	P_comm      [17]int8
+	Pad_cgo_5   [4]byte
+	P_pgrp      uint64
+	P_addr      uint64
+	P_xstat     uint16
+	P_acflag    uint16
+	Pad_cgo_6   [4]byte
+	P_ru        uint64
+}
+
+type Itimerval struct {
+	Interval Timeval
+	Value    Timeval
+}
+
+type Vnode struct{}
+
+type Pgrp struct{}
+
+type UserStruct struct{}
+
+type Au_session struct {
+	Aia_p *AuditinfoAddr
+	Mask  AuMask
+}
+
+type Posix_cred struct {
+	Uid       uint32
+	Ruid      uint32
+	Svuid     uint32
+	Ngroups   int16
+	Pad_cgo_0 [2]byte
+	Groups    [16]uint32
+	Rgid      uint32
+	Svgid     uint32
+	Gmuid     uint32
+	Flags     int32
+}
+
+type Label struct{}
+
+type AuditinfoAddr struct {
+	Auid   uint32
+	Mask   AuMask
+	Termid AuTidAddr
+	Asid   int32
+	Flags  uint64
+}
+type AuMask struct {
+	Success uint32
+	Failure uint32
+}
+type AuTidAddr struct {
+	Port int32
+	Type uint32
+	Addr [4]uint32
+}
+
+type UcredQueue struct {
+	Next *ucred
+	Prev **ucred
+}

plugins/system/ps/process/process_freebsd.go

@@ -0,0 +1,263 @@
+// +build freebsd
+
+package process
+
+import (
+	"bytes"
+	"encoding/binary"
+	"unsafe"
+
+	common "github.com/shirou/gopsutil/common"
+	cpu "github.com/shirou/gopsutil/cpu"
+	net "github.com/shirou/gopsutil/net"
+)
+
+// MemoryInfoExStat is different between OSes
+type MemoryInfoExStat struct {
+}
+
+type MemoryMapsStat struct {
+}
+
+func Pids() ([]int32, error) {
+	var ret []int32
+	procs, err := processes()
+	if err != nil {
+		return ret, nil
+	}
+
+	for _, p := range procs {
+		ret = append(ret, p.Pid)
+	}
+
+	return ret, nil
+}
+
+func (p *Process) Ppid() (int32, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return 0, err
+	}
+
+	return k.KiPpid, nil
+}
+func (p *Process) Name() (string, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return "", err
+	}
+
+	return string(k.KiComm[:]), nil
+}
+func (p *Process) Exe() (string, error) {
+	return "", common.NotImplementedError
+}
+func (p *Process) Cmdline() (string, error) {
+	return "", common.NotImplementedError
+}
+func (p *Process) CreateTime() (int64, error) {
+	return 0, common.NotImplementedError
+}
+func (p *Process) Cwd() (string, error) {
+	return "", common.NotImplementedError
+}
+func (p *Process) Parent() (*Process, error) {
+	return p, common.NotImplementedError
+}
+func (p *Process) Status() (string, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return "", err
+	}
+
+	return string(k.KiStat[:]), nil
+}
+func (p *Process) Uids() ([]int32, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return nil, err
+	}
+
+	uids := make([]int32, 0, 3)
+
+	uids = append(uids, int32(k.KiRuid), int32(k.KiUID), int32(k.KiSvuid))
+
+	return uids, nil
+}
+func (p *Process) Gids() ([]int32, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return nil, err
+	}
+
+	gids := make([]int32, 0, 3)
+	gids = append(gids, int32(k.KiRgid), int32(k.KiNgroups[0]), int32(k.KiSvuid))
+
+	return gids, nil
+}
+func (p *Process) Terminal() (string, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return "", err
+	}
+
+	ttyNr := uint64(k.KiTdev)
+
+	termmap, err := getTerminalMap()
+	if err != nil {
+		return "", err
+	}
+
+	return termmap[ttyNr], nil
+}
+func (p *Process) Nice() (int32, error) {
+	return 0, common.NotImplementedError
+}
+func (p *Process) IOnice() (int32, error) {
+	return 0, common.NotImplementedError
+}
+func (p *Process) Rlimit() ([]RlimitStat, error) {
+	var rlimit []RlimitStat
+	return rlimit, common.NotImplementedError
+}
+func (p *Process) IOCounters() (*IOCountersStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) NumCtxSwitches() (*NumCtxSwitchesStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) NumFDs() (int32, error) {
+	return 0, common.NotImplementedError
+}
+func (p *Process) NumThreads() (int32, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return 0, err
+	}
+
+	return k.KiNumthreads, nil
+}
+func (p *Process) Threads() (map[string]string, error) {
+	ret := make(map[string]string, 0)
+	return ret, common.NotImplementedError
+}
+func (p *Process) CPUTimes() (*cpu.CPUTimesStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) CPUAffinity() ([]int32, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) MemoryInfo() (*MemoryInfoStat, error) {
+	k, err := p.getKProc()
+	if err != nil {
+		return nil, err
+	}
+
+	ret := &MemoryInfoStat{
+		RSS: uint64(k.KiRssize),
+		VMS: uint64(k.KiSize),
+	}
+
+	return ret, nil
+}
+func (p *Process) MemoryInfoEx() (*MemoryInfoExStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) MemoryPercent() (float32, error) {
+	return 0, common.NotImplementedError
+}
+
+func (p *Process) Children() ([]*Process, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) OpenFiles() ([]OpenFilesStat, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) Connections() ([]net.NetConnectionStat, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) IsRunning() (bool, error) {
+	return true, common.NotImplementedError
+}
+func (p *Process) MemoryMaps(grouped bool) (*[]MemoryMapsStat, error) {
+	var ret []MemoryMapsStat
+	return &ret, common.NotImplementedError
+}
+
+func copyParams(k *KinfoProc, p *Process) error {
+
+	return nil
+}
+
+func processes() ([]Process, error) {
+	results := make([]Process, 0, 50)
+
+	mib := []int32{CTLKern, KernProc, KernProcProc, 0}
+	buf, length, err := common.CallSyscall(mib)
+	if err != nil {
+		return results, err
+	}
+
+	// get kinfo_proc size
+	k := KinfoProc{}
+	procinfoLen := int(unsafe.Sizeof(k))
+	count := int(length / uint64(procinfoLen))
+
+	// parse buf to procs
+	for i := 0; i < count; i++ {
+		b := buf[i*procinfoLen : i*procinfoLen+procinfoLen]
+		k, err := parseKinfoProc(b)
+		if err != nil {
+			continue
+		}
+		p, err := NewProcess(int32(k.KiPid))
+		if err != nil {
+			continue
+		}
+		copyParams(&k, p)
+
+		results = append(results, *p)
+	}
+
+	return results, nil
+}
+
+func parseKinfoProc(buf []byte) (KinfoProc, error) {
+	var k KinfoProc
+	br := bytes.NewReader(buf)
+	err := binary.Read(br, binary.LittleEndian, &k)
+	if err != nil {
+		return k, err
+	}
+
+	return k, nil
+}
+
+func (p *Process) getKProc() (*KinfoProc, error) {
+	mib := []int32{CTLKern, KernProc, KernProcPID, p.Pid}
+
+	buf, length, err := common.CallSyscall(mib)
+	if err != nil {
+		return nil, err
+	}
+	procK := KinfoProc{}
+	if length != uint64(unsafe.Sizeof(procK)) {
+		return nil, err
+	}
+
+	k, err := parseKinfoProc(buf)
+	if err != nil {
+		return nil, err
+	}
+
+	return &k, nil
+}
+
+func NewProcess(pid int32) (*Process, error) {
+	p := &Process{Pid: pid}
+
+	return p, nil
+}

plugins/system/ps/process/process_freebsd_386.go

@@ -0,0 +1,96 @@
+// +build freebsd
+// +build 386
+
+package process
+
+// copied from sys/sysctl.h
+const (
+	CTLKern          = 1  // "high kernel": proc, limits
+	KernProc         = 14 // struct: process entries
+	KernProcPID      = 1  // by process id
+	KernProcProc     = 8  // only return procs
+	KernProcPathname = 12 // path to executable
+)
+
+// copied from sys/user.h
+type KinfoProc struct {
+	KiStructsize   int32
+	KiLayout       int32
+	KiArgs         int32
+	KiPaddr        int32
+	KiAddr         int32
+	KiTracep       int32
+	KiTextvp       int32
+	KiFd           int32
+	KiVmspace      int32
+	KiWchan        int32
+	KiPid          int32
+	KiPpid         int32
+	KiPgid         int32
+	KiTpgid        int32
+	KiSid          int32
+	KiTsid         int32
+	KiJobc         [2]byte
+	KiSpareShort1  [2]byte
+	KiTdev         int32
+	KiSiglist      [16]byte
+	KiSigmask      [16]byte
+	KiSigignore    [16]byte
+	KiSigcatch     [16]byte
+	KiUID          int32
+	KiRuid         int32
+	KiSvuid        int32
+	KiRgid         int32
+	KiSvgid        int32
+	KiNgroups      [2]byte
+	KiSpareShort2  [2]byte
+	KiGroups       [64]byte
+	KiSize         int32
+	KiRssize       int32
+	KiSwrss        int32
+	KiTsize        int32
+	KiDsize        int32
+	KiSsize        int32
+	KiXstat        [2]byte
+	KiAcflag       [2]byte
+	KiPctcpu       int32
+	KiEstcpu       int32
+	KiSlptime      int32
+	KiSwtime       int32
+	KiCow          int32
+	KiRuntime      int64
+	KiStart        [8]byte
+	KiChildtime    [8]byte
+	KiFlag         int32
+	KiKflag        int32
+	KiTraceflag    int32
+	KiStat         [1]byte
+	KiNice         [1]byte
+	KiLock         [1]byte
+	KiRqindex      [1]byte
+	KiOncpu        [1]byte
+	KiLastcpu      [1]byte
+	KiOcomm        [17]byte
+	KiWmesg        [9]byte
+	KiLogin        [18]byte
+	KiLockname     [9]byte
+	KiComm         [20]byte
+	KiEmul         [17]byte
+	KiSparestrings [68]byte
+	KiSpareints    [36]byte
+	KiCrFlags      int32
+	KiJid          int32
+	KiNumthreads   int32
+	KiTid          int32
+	KiPri          int32
+	KiRusage       [72]byte
+	KiRusageCh     [72]byte
+	KiPcb          int32
+	KiKstack       int32
+	KiUdata        int32
+	KiTdaddr       int32
+	KiSpareptrs    [24]byte
+	KiSpareint64s  [48]byte
+	KiSflag        int32
+	KiTdflags      int32
+}

plugins/system/ps/process/process_freebsd_amd64.go

@@ -0,0 +1,96 @@
+// +build freebsd
+// +build amd64
+
+package process
+
+// copied from sys/sysctl.h
+const (
+	CTLKern          = 1  // "high kernel": proc, limits
+	KernProc         = 14 // struct: process entries
+	KernProcPID      = 1  // by process id
+	KernProcProc     = 8  // only return procs
+	KernProcPathname = 12 // path to executable
+)
+
+// copied from sys/user.h
+type KinfoProc struct {
+	KiStructsize   int32
+	KiLayout       int32
+	KiArgs         int64
+	KiPaddr        int64
+	KiAddr         int64
+	KiTracep       int64
+	KiTextvp       int64
+	KiFd           int64
+	KiVmspace      int64
+	KiWchan        int64
+	KiPid          int32
+	KiPpid         int32
+	KiPgid         int32
+	KiTpgid        int32
+	KiSid          int32
+	KiTsid         int32
+	KiJobc         [2]byte
+	KiSpareShort1  [2]byte
+	KiTdev         int32
+	KiSiglist      [16]byte
+	KiSigmask      [16]byte
+	KiSigignore    [16]byte
+	KiSigcatch     [16]byte
+	KiUID          int32
+	KiRuid         int32
+	KiSvuid        int32
+	KiRgid         int32
+	KiSvgid        int32
+	KiNgroups      [2]byte
+	KiSpareShort2  [2]byte
+	KiGroups       [64]byte
+	KiSize         int64
+	KiRssize       int64
+	KiSwrss        int64
+	KiTsize        int64
+	KiDsize        int64
+	KiSsize        int64
+	KiXstat        [2]byte
+	KiAcflag       [2]byte
+	KiPctcpu       int32
+	KiEstcpu       int32
+	KiSlptime      int32
+	KiSwtime       int32
+	KiCow          int32
+	KiRuntime      int64
+	KiStart        [16]byte
+	KiChildtime    [16]byte
+	KiFlag         int64
+	KiKflag        int64
+	KiTraceflag    int32
+	KiStat         [1]byte
+	KiNice         [1]byte
+	KiLock         [1]byte
+	KiRqindex      [1]byte
+	KiOncpu        [1]byte
+	KiLastcpu      [1]byte
+	KiOcomm        [17]byte
+	KiWmesg        [9]byte
+	KiLogin        [18]byte
+	KiLockname     [9]byte
+	KiComm         [20]byte
+	KiEmul         [17]byte
+	KiSparestrings [68]byte
+	KiSpareints    [36]byte
+	KiCrFlags      int32
+	KiJid          int32
+	KiNumthreads   int32
+	KiTid          int32
+	KiPri          int32
+	KiRusage       [144]byte
+	KiRusageCh     [144]byte
+	KiPcb          int64
+	KiKstack       int64
+	KiUdata        int64
+	KiTdaddr       int64
+	KiSpareptrs    [48]byte
+	KiSpareint64s  [96]byte
+	KiSflag        int64
+	KiTdflags      int64
+}

plugins/system/ps/process/process_linux.go

@@ -0,0 +1,597 @@
+// +build linux
+
+package process
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"syscall"
+
+	common "github.com/shirou/gopsutil/common"
+	cpu "github.com/shirou/gopsutil/cpu"
+	host "github.com/shirou/gopsutil/host"
+	net "github.com/shirou/gopsutil/net"
+)
+
+const (
+	PrioProcess = 0 // linux/resource.h
+)
+
+// MemoryInfoExStat is different between OSes
+type MemoryInfoExStat struct {
+	RSS    uint64 `json:"rss"`    // bytes
+	VMS    uint64 `json:"vms"`    // bytes
+	Shared uint64 `json:"shared"` // bytes
+	Text   uint64 `json:"text"`   // bytes
+	Lib    uint64 `json:"lib"`    // bytes
+	Data   uint64 `json:"data"`   // bytes
+	Dirty  uint64 `json:"dirty"`  // bytes
+}
+
+func (m MemoryInfoExStat) String() string {
+	s, _ := json.Marshal(m)
+	return string(s)
+}
+
+type MemoryMapsStat struct {
+	Path         string `json:"path"`
+	Rss          uint64 `json:"rss"`
+	Size         uint64 `json:"size"`
+	Pss          uint64 `json:"pss"`
+	SharedClean  uint64 `json:"shared_clean"`
+	SharedDirty  uint64 `json:"shared_dirty"`
+	PrivateClean uint64 `json:"private_clean"`
+	PrivateDirty uint64 `json:"private_dirty"`
+	Referenced   uint64 `json:"referenced"`
+	Anonymous    uint64 `json:"anonymous"`
+	Swap         uint64 `json:"swap"`
+}
+
+func (m MemoryMapsStat) String() string {
+	s, _ := json.Marshal(m)
+	return string(s)
+}
+
+// Create new Process instance
+// This only stores Pid
+func NewProcess(pid int32) (*Process, error) {
+	p := &Process{
+		Pid: int32(pid),
+	}
+	err := p.fillFromStatus()
+	return p, err
+}
+
+func (p *Process) Ppid() (int32, error) {
+	_, ppid, _, _, _, err := p.fillFromStat()
+	if err != nil {
+		return -1, err
+	}
+	return ppid, nil
+}
+func (p *Process) Name() (string, error) {
+	return p.name, nil
+}
+func (p *Process) Exe() (string, error) {
+	return p.fillFromExe()
+}
+func (p *Process) Cmdline() (string, error) {
+	return p.fillFromCmdline()
+}
+func (p *Process) CreateTime() (int64, error) {
+	_, _, _, createTime, _, err := p.fillFromStat()
+	if err != nil {
+		return 0, err
+	}
+	return createTime, nil
+}
+
+func (p *Process) Cwd() (string, error) {
+	return p.fillFromCwd()
+}
+func (p *Process) Parent() (*Process, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) Status() (string, error) {
+	return p.status, nil
+}
+func (p *Process) Uids() ([]int32, error) {
+	return p.uids, nil
+}
+func (p *Process) Gids() ([]int32, error) {
+	return p.gids, nil
+}
+func (p *Process) Terminal() (string, error) {
+	terminal, _, _, _, _, err := p.fillFromStat()
+	if err != nil {
+		return "", err
+	}
+	return terminal, nil
+}
+func (p *Process) Nice() (int32, error) {
+	_, _, _, _, nice, err := p.fillFromStat()
+	if err != nil {
+		return 0, err
+	}
+	return nice, nil
+}
+func (p *Process) IOnice() (int32, error) {
+	return 0, common.NotImplementedError
+}
+func (p *Process) Rlimit() ([]RlimitStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) IOCounters() (*IOCountersStat, error) {
+	return p.fillFromIO()
+}
+func (p *Process) NumCtxSwitches() (*NumCtxSwitchesStat, error) {
+	return p.numCtxSwitches, nil
+}
+func (p *Process) NumFDs() (int32, error) {
+	return 0, common.NotImplementedError
+}
+func (p *Process) NumThreads() (int32, error) {
+	return p.numThreads, nil
+}
+func (p *Process) Threads() (map[string]string, error) {
+	ret := make(map[string]string, 0)
+	return ret, nil
+}
+func (p *Process) CPUTimes() (*cpu.CPUTimesStat, error) {
+	_, _, cpuTimes, _, _, err := p.fillFromStat()
+	if err != nil {
+		return nil, err
+	}
+	return cpuTimes, nil
+}
+func (p *Process) CPUAffinity() ([]int32, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) MemoryInfo() (*MemoryInfoStat, error) {
+	return p.memInfo, nil
+}
+func (p *Process) MemoryInfoEx() (*MemoryInfoExStat, error) {
+	_, memInfoEx, err := p.fillFromStatm()
+	if err != nil {
+		return nil, err
+	}
+	return memInfoEx, nil
+}
+func (p *Process) MemoryPercent() (float32, error) {
+	return 0, common.NotImplementedError
+}
+
+func (p *Process) Children() ([]*Process, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) OpenFiles() ([]OpenFilesStat, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) Connections() ([]net.NetConnectionStat, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) IsRunning() (bool, error) {
+	return true, common.NotImplementedError
+}
+
+// MemoryMaps get memory maps from /proc/(pid)/smaps
+func (p *Process) MemoryMaps(grouped bool) (*[]MemoryMapsStat, error) {
+	pid := p.Pid
+	var ret []MemoryMapsStat
+	smapsPath := filepath.Join("/", "proc", 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
+}
+
+/**
+** Internal functions
+**/
+
+// Get num_fds from /proc/(pid)/fd
+func (p *Process) fillFromfd() (int32, []*OpenFilesStat, error) {
+	pid := p.Pid
+	statPath := filepath.Join("/", "proc", 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 cwd from /proc/(pid)/cwd
+func (p *Process) fillFromCwd() (string, error) {
+	pid := p.Pid
+	cwdPath := filepath.Join("/", "proc", strconv.Itoa(int(pid)), "cwd")
+	cwd, err := os.Readlink(cwdPath)
+	if err != nil {
+		return "", err
+	}
+	return string(cwd), nil
+}
+
+// Get exe from /proc/(pid)/exe
+func (p *Process) fillFromExe() (string, error) {
+	pid := p.Pid
+	exePath := filepath.Join("/", "proc", strconv.Itoa(int(pid)), "exe")
+	exe, err := os.Readlink(exePath)
+	if err != nil {
+		return "", err
+	}
+	return string(exe), nil
+}
+
+// Get cmdline from /proc/(pid)/cmdline
+func (p *Process) fillFromCmdline() (string, error) {
+	pid := p.Pid
+	cmdPath := filepath.Join("/", "proc", 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
+}
+
+// Get IO status from /proc/(pid)/io
+func (p *Process) fillFromIO() (*IOCountersStat, error) {
+	pid := p.Pid
+	ioPath := filepath.Join("/", "proc", 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
+}
+
+// Get memory info from /proc/(pid)/statm
+func (p *Process) fillFromStatm() (*MemoryInfoStat, *MemoryInfoExStat, error) {
+	pid := p.Pid
+	memPath := filepath.Join("/", "proc", 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 various status from /proc/(pid)/status
+func (p *Process) fillFromStatus() error {
+	pid := p.Pid
+	statPath := filepath.Join("/", "proc", 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
+}
+
+func (p *Process) fillFromStat() (string, int32, *cpu.CPUTimesStat, int64, int32, error) {
+	pid := p.Pid
+	statPath := filepath.Join("/", "proc", 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)) * 1000
+	createTime := int64(ctime)
+
+	//	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
+}
+
+func Pids() ([]int32, error) {
+	var ret []int32
+
+	d, err := os.Open("/proc")
+	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
+}

plugins/system/ps/process/process_linux_386.go

@@ -0,0 +1,9 @@
+// +build linux
+// +build 386
+
+package process
+
+const (
+	ClockTicks = 100  // C.sysconf(C._SC_CLK_TCK)
+	PageSize   = 4096 // C.sysconf(C._SC_PAGE_SIZE)
+)

plugins/system/ps/process/process_linux_amd64.go

@@ -0,0 +1,9 @@
+// +build linux
+// +build amd64
+
+package process
+
+const (
+	ClockTicks = 100  // C.sysconf(C._SC_CLK_TCK)
+	PageSize   = 4096 // C.sysconf(C._SC_PAGE_SIZE)
+)

plugins/system/ps/process/process_linux_arm.go

@@ -0,0 +1,9 @@
+// +build linux
+// +build arm
+
+package process
+
+const (
+	ClockTicks = 100  // C.sysconf(C._SC_CLK_TCK)
+	PageSize   = 4096 // C.sysconf(C._SC_PAGE_SIZE)
+)

plugins/system/ps/process/process_posix.go

@@ -0,0 +1,102 @@
+// +build linux freebsd darwin
+
+package process
+
+import (
+	"os"
+	"os/exec"
+	"os/user"
+	"strconv"
+	"strings"
+	"syscall"
+)
+
+// POSIX
+func getTerminalMap() (map[uint64]string, error) {
+	ret := make(map[uint64]string)
+	var termfiles []string
+
+	d, err := os.Open("/dev")
+	if err != nil {
+		return nil, err
+	}
+	defer d.Close()
+
+	devnames, err := d.Readdirnames(-1)
+	for _, devname := range devnames {
+		if strings.HasPrefix(devname, "/dev/tty") {
+			termfiles = append(termfiles, "/dev/tty/"+devname)
+		}
+	}
+
+	ptsd, err := os.Open("/dev/pts")
+	if err != nil {
+		return nil, err
+	}
+	defer ptsd.Close()
+
+	ptsnames, err := ptsd.Readdirnames(-1)
+	for _, ptsname := range ptsnames {
+		termfiles = append(termfiles, "/dev/pts/"+ptsname)
+	}
+
+	for _, name := range termfiles {
+		stat := syscall.Stat_t{}
+		if err = syscall.Stat(name, &stat); err != nil {
+			return nil, err
+		}
+		rdev := uint64(stat.Rdev)
+		ret[rdev] = strings.Replace(name, "/dev", "", -1)
+	}
+	return ret, nil
+}
+
+func (p *Process) SendSignal(sig syscall.Signal) error {
+	sigAsStr := "INT"
+	switch sig {
+	case syscall.SIGSTOP:
+		sigAsStr = "STOP"
+	case syscall.SIGCONT:
+		sigAsStr = "CONT"
+	case syscall.SIGTERM:
+		sigAsStr = "TERM"
+	case syscall.SIGKILL:
+		sigAsStr = "KILL"
+	}
+
+	cmd := exec.Command("kill", "-s", sigAsStr, strconv.Itoa(int(p.Pid)))
+	cmd.Stderr = os.Stderr
+	err := cmd.Run()
+	if err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (p *Process) Suspend() error {
+	return p.SendSignal(syscall.SIGSTOP)
+}
+func (p *Process) Resume() error {
+	return p.SendSignal(syscall.SIGCONT)
+}
+func (p *Process) Terminate() error {
+	return p.SendSignal(syscall.SIGTERM)
+}
+func (p *Process) Kill() error {
+	return p.SendSignal(syscall.SIGKILL)
+}
+func (p *Process) Username() (string, error) {
+	uids, err := p.Uids()
+	if err != nil {
+		return "", err
+	}
+	if len(uids) > 0 {
+		u, err := user.LookupId(strconv.Itoa(int(uids[0])))
+		if err != nil {
+			return "", err
+		}
+		return u.Username, nil
+	}
+	return "", nil
+}

plugins/system/ps/process/process_posix_test.go

@@ -0,0 +1,19 @@
+// +build linux freebsd
+
+package process
+
+import (
+	"os"
+	"syscall"
+	"testing"
+)
+
+func Test_SendSignal(t *testing.T) {
+	checkPid := os.Getpid()
+
+	p, _ := NewProcess(int32(checkPid))
+	err := p.SendSignal(syscall.SIGCONT)
+	if err != nil {
+		t.Errorf("send signal %v", err)
+	}
+}

plugins/system/ps/process/process_test.go

@@ -0,0 +1,241 @@
+package process
+
+import (
+	"os"
+	"runtime"
+	"strings"
+	"testing"
+	"time"
+)
+
+func testGetProcess() Process {
+	checkPid := os.Getpid() // process.test
+	ret, _ := NewProcess(int32(checkPid))
+	return *ret
+}
+
+func Test_Pids(t *testing.T) {
+	ret, err := Pids()
+	if err != nil {
+		t.Errorf("error %v", err)
+	}
+	if len(ret) == 0 {
+		t.Errorf("could not get pids %v", ret)
+	}
+}
+
+func Test_Pid_exists(t *testing.T) {
+	checkPid := os.Getpid()
+
+	ret, err := PidExists(int32(checkPid))
+	if err != nil {
+		t.Errorf("error %v", err)
+	}
+
+	if ret == false {
+		t.Errorf("could not get process exists: %v", ret)
+	}
+}
+
+func Test_NewProcess(t *testing.T) {
+	checkPid := os.Getpid()
+
+	ret, err := NewProcess(int32(checkPid))
+	if err != nil {
+		t.Errorf("error %v", err)
+	}
+	empty := &Process{}
+	if runtime.GOOS != "windows" { // Windows pid is 0
+		if empty == ret {
+			t.Errorf("error %v", ret)
+		}
+	}
+
+}
+
+func Test_Process_memory_maps(t *testing.T) {
+	checkPid := os.Getpid()
+
+	ret, err := NewProcess(int32(checkPid))
+
+	mmaps, err := ret.MemoryMaps(false)
+	if err != nil {
+		t.Errorf("memory map get error %v", err)
+	}
+	empty := MemoryMapsStat{}
+	for _, m := range *mmaps {
+		if m == empty {
+			t.Errorf("memory map get error %v", m)
+		}
+	}
+}
+func Test_Process_MemoryInfo(t *testing.T) {
+	p := testGetProcess()
+
+	v, err := p.MemoryInfo()
+	if err != nil {
+		t.Errorf("geting ppid error %v", err)
+	}
+	empty := MemoryInfoStat{}
+	if v == nil || *v == empty {
+		t.Errorf("could not get memory info %v", v)
+	}
+}
+
+func Test_Process_CmdLine(t *testing.T) {
+	p := testGetProcess()
+
+	v, err := p.Cmdline()
+	if err != nil {
+		t.Errorf("geting ppid error %v", err)
+	}
+	if !strings.Contains(v, "process.test") {
+		t.Errorf("invalid cmd line %v", v)
+	}
+}
+
+func Test_Process_Ppid(t *testing.T) {
+	p := testGetProcess()
+
+	v, err := p.Ppid()
+	if err != nil {
+		t.Errorf("geting ppid error %v", err)
+	}
+	if v == 0 {
+		t.Errorf("return value is 0 %v", v)
+	}
+}
+
+func Test_Process_Status(t *testing.T) {
+	p := testGetProcess()
+
+	v, err := p.Status()
+	if err != nil {
+		t.Errorf("geting ppid error %v", err)
+	}
+	if !strings.HasPrefix(v, "S") && v != "running" && v != "sleeping" {
+		t.Errorf("could not get state %v", v)
+	}
+}
+
+func Test_Process_Terminal(t *testing.T) {
+	p := testGetProcess()
+
+	_, err := p.Terminal()
+	if err != nil {
+		t.Errorf("geting terminal error %v", err)
+	}
+
+	/*
+		if v == "" {
+			t.Errorf("could not get terminal %v", v)
+		}
+	*/
+}
+
+func Test_Process_IOCounters(t *testing.T) {
+	p := testGetProcess()
+
+	v, err := p.IOCounters()
+	if err != nil {
+		t.Errorf("geting iocounter error %v", err)
+		return
+	}
+	empty := &IOCountersStat{}
+	if v == empty {
+		t.Errorf("error %v", v)
+	}
+}
+
+func Test_Process_NumCtx(t *testing.T) {
+	p := testGetProcess()
+
+	_, err := p.NumCtxSwitches()
+	if err != nil {
+		t.Errorf("geting numctx error %v", err)
+		return
+	}
+}
+
+func Test_Process_Nice(t *testing.T) {
+	p := testGetProcess()
+
+	n, err := p.Nice()
+	if err != nil {
+		t.Errorf("geting nice error %v", err)
+	}
+	if n != 0 && n != 20 && n != 8 {
+		t.Errorf("invalid nice: %d", n)
+	}
+}
+func Test_Process_NumThread(t *testing.T) {
+	p := testGetProcess()
+
+	n, err := p.NumThreads()
+	if err != nil {
+		t.Errorf("geting NumThread error %v", err)
+	}
+	if n < 0 {
+		t.Errorf("invalid NumThread: %d", n)
+	}
+}
+
+func Test_Process_Name(t *testing.T) {
+	p := testGetProcess()
+
+	n, err := p.Name()
+	if err != nil {
+		t.Errorf("geting name error %v", err)
+	}
+	if !strings.Contains(n, "process.test") {
+		t.Errorf("invalid Exe %s", n)
+	}
+}
+func Test_Process_Exe(t *testing.T) {
+	p := testGetProcess()
+
+	n, err := p.Exe()
+	if err != nil {
+		t.Errorf("geting Exe error %v", err)
+	}
+	if !strings.Contains(n, "process.test") {
+		t.Errorf("invalid Exe %s", n)
+	}
+}
+
+func Test_Process_CpuPercent(t *testing.T) {
+	p := testGetProcess()
+	percent, err := p.CPUPercent(0)
+	if err != nil {
+		t.Errorf("error %v", err)
+	}
+	duration := time.Duration(1000) * time.Microsecond
+	time.Sleep(duration)
+	percent, err = p.CPUPercent(0)
+	if err != nil {
+		t.Errorf("error %v", err)
+	}
+
+	numcpu := runtime.NumCPU()
+	//	if percent < 0.0 || percent > 100.0*float64(numcpu) { // TODO
+	if percent < 0.0 {
+		t.Fatalf("CPUPercent value is invalid: %f, %d", percent, numcpu)
+	}
+}
+
+func Test_Process_CpuPercentLoop(t *testing.T) {
+	p := testGetProcess()
+	numcpu := runtime.NumCPU()
+
+	for i := 0; i < 2; i++ {
+		duration := time.Duration(100) * time.Microsecond
+		percent, err := p.CPUPercent(duration)
+		if err != nil {
+			t.Errorf("error %v", err)
+		}
+		//	if percent < 0.0 || percent > 100.0*float64(numcpu) { // TODO
+		if percent < 0.0 {
+			t.Fatalf("CPUPercent value is invalid: %f, %d", percent, numcpu)
+		}
+	}
+}

plugins/system/ps/process/process_windows.go

@@ -0,0 +1,305 @@
+// +build windows
+
+package process
+
+import (
+	"errors"
+	"fmt"
+	"strconv"
+	"syscall"
+	"unsafe"
+
+	"github.com/shirou/w32"
+
+	common "github.com/shirou/gopsutil/common"
+	cpu "github.com/shirou/gopsutil/cpu"
+	net "github.com/shirou/gopsutil/net"
+)
+
+const (
+	NoMoreFiles   = 0x12
+	MaxPathLength = 260
+)
+
+type SystemProcessInformation struct {
+	NextEntryOffset   uint64
+	NumberOfThreads   uint64
+	Reserved1         [48]byte
+	Reserved2         [3]byte
+	UniqueProcessID   uintptr
+	Reserved3         uintptr
+	HandleCount       uint64
+	Reserved4         [4]byte
+	Reserved5         [11]byte
+	PeakPagefileUsage uint64
+	PrivatePageCount  uint64
+	Reserved6         [6]uint64
+}
+
+// Memory_info_ex is different between OSes
+type MemoryInfoExStat struct {
+}
+
+type MemoryMapsStat struct {
+}
+
+func Pids() ([]int32, error) {
+	var ret []int32
+
+	procs, err := processes()
+	if err != nil {
+		return ret, nil
+	}
+
+	for _, proc := range procs {
+		ret = append(ret, proc.Pid)
+	}
+
+	return ret, nil
+}
+
+func (p *Process) Ppid() (int32, error) {
+	ret, _, _, err := p.getFromSnapProcess(p.Pid)
+	if err != nil {
+		return 0, err
+	}
+	return ret, nil
+}
+func (p *Process) Name() (string, error) {
+	query := fmt.Sprintf("ProcessId = %d", p.Pid)
+	lines, err := common.GetWmic("process", "where", query, "get", "Name")
+	if err != nil {
+		return "", err
+	}
+	if len(lines) == 0 {
+		return "", fmt.Errorf("could not get Name")
+	}
+	return lines[0][1], nil
+}
+func (p *Process) Exe() (string, error) {
+	query := fmt.Sprintf("ProcessId = %d", p.Pid)
+	lines, err := common.GetWmic("process", "where", query, "get", "ExecutablePath")
+	if err != nil {
+		return "", err
+	}
+	if len(lines) == 0 {
+		return "", fmt.Errorf("could not get ExecutablePath")
+	}
+	return lines[0][1], nil
+}
+func (p *Process) Cmdline() (string, error) {
+	query := fmt.Sprintf("ProcessId = %d", p.Pid)
+	lines, err := common.GetWmic("process", "where", query, "get", "CommandLine")
+	if err != nil {
+		return "", err
+	}
+	if len(lines) == 0 {
+		return "", fmt.Errorf("could not get command line")
+	}
+
+	return lines[0][1], nil
+}
+func (p *Process) Cwd() (string, error) {
+	return "", common.NotImplementedError
+}
+func (p *Process) Parent() (*Process, error) {
+	return p, common.NotImplementedError
+}
+func (p *Process) Status() (string, error) {
+	return "", common.NotImplementedError
+}
+func (p *Process) Username() (string, error) {
+	return "", common.NotImplementedError
+}
+func (p *Process) Uids() ([]int32, error) {
+	var uids []int32
+
+	return uids, common.NotImplementedError
+}
+func (p *Process) Gids() ([]int32, error) {
+	var gids []int32
+	return gids, common.NotImplementedError
+}
+func (p *Process) Terminal() (string, error) {
+	return "", common.NotImplementedError
+}
+
+// Nice returnes priority in Windows
+func (p *Process) Nice() (int32, error) {
+	query := fmt.Sprintf("ProcessId = %d", p.Pid)
+	lines, err := common.GetWmic("process", "where", query, "get", "Priority")
+	if err != nil {
+		return 0, err
+	}
+	if len(lines) == 0 {
+		return 0, fmt.Errorf("could not get command line")
+	}
+	priority, err := strconv.Atoi(lines[0][1])
+	if err != nil {
+		return 0, err
+	}
+
+	return int32(priority), nil
+}
+func (p *Process) IOnice() (int32, error) {
+	return 0, common.NotImplementedError
+}
+func (p *Process) Rlimit() ([]RlimitStat, error) {
+	var rlimit []RlimitStat
+
+	return rlimit, common.NotImplementedError
+}
+func (p *Process) IOCounters() (*IOCountersStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) NumCtxSwitches() (*NumCtxSwitchesStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) NumFDs() (int32, error) {
+	return 0, common.NotImplementedError
+}
+func (p *Process) NumThreads() (int32, error) {
+	query := fmt.Sprintf("ProcessId = %d", p.Pid)
+	lines, err := common.GetWmic("process", "where", query, "get", "ThreadCount")
+	if err != nil {
+		return 0, err
+	}
+	if len(lines) == 0 {
+		return 0, fmt.Errorf("could not get command line")
+	}
+	count, err := strconv.Atoi(lines[0][1])
+	if err != nil {
+		return 0, err
+	}
+
+	return int32(count), nil
+}
+func (p *Process) Threads() (map[string]string, error) {
+	ret := make(map[string]string, 0)
+	return ret, common.NotImplementedError
+}
+func (p *Process) CPUTimes() (*cpu.CPUTimesStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) CPUAffinity() ([]int32, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) MemoryInfo() (*MemoryInfoStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) MemoryInfoEx() (*MemoryInfoExStat, error) {
+	return nil, common.NotImplementedError
+}
+func (p *Process) MemoryPercent() (float32, error) {
+	return 0, common.NotImplementedError
+}
+
+func (p *Process) Children() ([]*Process, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) OpenFiles() ([]OpenFilesStat, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) Connections() ([]net.NetConnectionStat, error) {
+	return nil, common.NotImplementedError
+}
+
+func (p *Process) IsRunning() (bool, error) {
+	return true, common.NotImplementedError
+}
+
+func (p *Process) MemoryMaps(grouped bool) (*[]MemoryMapsStat, error) {
+	ret := make([]MemoryMapsStat, 0)
+	return &ret, common.NotImplementedError
+}
+
+func NewProcess(pid int32) (*Process, error) {
+	p := &Process{Pid: pid}
+
+	return p, nil
+}
+
+func (p *Process) SendSignal(sig syscall.Signal) error {
+	return common.NotImplementedError
+}
+
+func (p *Process) Suspend() error {
+	return common.NotImplementedError
+}
+func (p *Process) Resume() error {
+	return common.NotImplementedError
+}
+func (p *Process) Terminate() error {
+	return common.NotImplementedError
+}
+func (p *Process) Kill() error {
+	return common.NotImplementedError
+}
+
+func (p *Process) getFromSnapProcess(pid int32) (int32, int32, string, error) {
+	snap := w32.CreateToolhelp32Snapshot(w32.TH32CS_SNAPPROCESS, uint32(pid))
+	if snap == 0 {
+		return 0, 0, "", syscall.GetLastError()
+	}
+	defer w32.CloseHandle(snap)
+	var pe32 w32.PROCESSENTRY32
+	pe32.DwSize = uint32(unsafe.Sizeof(pe32))
+	if w32.Process32First(snap, &pe32) == false {
+		return 0, 0, "", syscall.GetLastError()
+	}
+
+	if pe32.Th32ProcessID == uint32(pid) {
+		szexe := syscall.UTF16ToString(pe32.SzExeFile[:])
+		return int32(pe32.Th32ParentProcessID), int32(pe32.CntThreads), szexe, nil
+	}
+
+	for w32.Process32Next(snap, &pe32) {
+		if pe32.Th32ProcessID == uint32(pid) {
+			szexe := syscall.UTF16ToString(pe32.SzExeFile[:])
+			return int32(pe32.Th32ParentProcessID), int32(pe32.CntThreads), szexe, nil
+		}
+	}
+	return 0, 0, "", errors.New("Couldn't find pid:" + string(pid))
+}
+
+// Get processes
+func processes() ([]*Process, error) {
+	lines, err := common.GetWmic("process", "get", "processid")
+	if err != nil {
+		return nil, err
+	}
+	var results []*Process
+	for _, l := range lines {
+		pid, err := strconv.Atoi(l[1])
+		if err != nil {
+			continue
+		}
+		p, err := NewProcess(int32(pid))
+		if err != nil {
+			continue
+		}
+		results = append(results, p)
+	}
+
+	return results, nil
+}
+
+func getProcInfo(pid int32) (*SystemProcessInformation, error) {
+	initialBufferSize := uint64(0x4000)
+	bufferSize := initialBufferSize
+	buffer := make([]byte, bufferSize)
+
+	var sysProcInfo SystemProcessInformation
+	ret, _, _ := common.ProcNtQuerySystemInformation.Call(
+		uintptr(unsafe.Pointer(&sysProcInfo)),
+		uintptr(unsafe.Pointer(&buffer[0])),
+		uintptr(unsafe.Pointer(&bufferSize)),
+		uintptr(unsafe.Pointer(&bufferSize)))
+	if ret != 0 {
+		return nil, syscall.GetLastError()
+	}
+
+	return &sysProcInfo, nil
+}

plugins/system/ps/process/types_darwin.go

@@ -0,0 +1,160 @@
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// Hand Writing
+// - all pointer in ExternProc to uint64
+
+// +build ignore
+
+/*
+Input to cgo -godefs.
+*/
+
+// +godefs map struct_in_addr [4]byte /* in_addr */
+// +godefs map struct_in6_addr [16]byte /* in6_addr */
+// +godefs map struct_ [16]byte /* in6_addr */
+
+package process
+
+/*
+#define __DARWIN_UNIX03 0
+#define KERNEL
+#define _DARWIN_USE_64_BIT_INODE
+#include <dirent.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <termios.h>
+#include <unistd.h>
+#include <mach/mach.h>
+#include <mach/message.h>
+#include <sys/event.h>
+#include <sys/mman.h>
+#include <sys/mount.h>
+#include <sys/param.h>
+#include <sys/ptrace.h>
+#include <sys/resource.h>
+#include <sys/select.h>
+#include <sys/signal.h>
+#include <sys/socket.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <sys/types.h>
+#include <sys/uio.h>
+#include <sys/un.h>
+#include <net/bpf.h>
+#include <net/if_dl.h>
+#include <net/if_var.h>
+#include <net/route.h>
+#include <netinet/in.h>
+
+#include <sys/sysctl.h>
+#include <sys/ucred.h>
+#include <sys/proc.h>
+#include <sys/time.h>
+#include <sys/_types/_timeval.h>
+#include <sys/appleapiopts.h>
+#include <sys/cdefs.h>
+#include <sys/param.h>
+#include <bsm/audit.h>
+#include <sys/queue.h>
+
+enum {
+	sizeofPtr = sizeof(void*),
+};
+
+union sockaddr_all {
+	struct sockaddr s1;	// this one gets used for fields
+	struct sockaddr_in s2;	// these pad it out
+	struct sockaddr_in6 s3;
+	struct sockaddr_un s4;
+	struct sockaddr_dl s5;
+};
+
+struct sockaddr_any {
+	struct sockaddr addr;
+	char pad[sizeof(union sockaddr_all) - sizeof(struct sockaddr)];
+};
+
+struct ucred_queue {
+        struct ucred *tqe_next;
+        struct ucred **tqe_prev;
+        TRACEBUF
+};
+
+*/
+import "C"
+
+// Machine characteristics; for internal use.
+
+const (
+	sizeofPtr      = C.sizeofPtr
+	sizeofShort    = C.sizeof_short
+	sizeofInt      = C.sizeof_int
+	sizeofLong     = C.sizeof_long
+	sizeofLongLong = C.sizeof_longlong
+)
+
+// Basic types
+
+type (
+	_C_short     C.short
+	_C_int       C.int
+	_C_long      C.long
+	_C_long_long C.longlong
+)
+
+// Time
+
+type Timespec C.struct_timespec
+
+type Timeval C.struct_timeval
+
+// Processes
+
+type Rusage C.struct_rusage
+
+type Rlimit C.struct_rlimit
+
+type UGid_t C.gid_t
+
+type KinfoProc C.struct_kinfo_proc
+
+type Eproc C.struct_eproc
+
+type Proc C.struct_proc
+
+type Session C.struct_session
+
+type ucred C.struct_ucred
+
+type Uucred C.struct__ucred
+
+type Upcred C.struct__pcred
+
+type Vmspace C.struct_vmspace
+
+type Sigacts C.struct_sigacts
+
+type ExternProc C.struct_extern_proc
+
+type Itimerval C.struct_itimerval
+
+type Vnode C.struct_vnode
+
+type Pgrp C.struct_pgrp
+
+type UserStruct C.struct_user
+
+type Au_session C.struct_au_session
+
+type Posix_cred C.struct_posix_cred
+
+type Label C.struct_label
+
+type AuditinfoAddr C.struct_auditinfo_addr
+type AuMask C.struct_au_mask
+type AuTidAddr C.struct_au_tid_addr
+
+// TAILQ(ucred)
+type UcredQueue C.struct_ucred_queue