1263 lines
32 KiB
Go
1263 lines
32 KiB
Go
// +build linux
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package process
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import (
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"bufio"
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"bytes"
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"context"
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"encoding/json"
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"fmt"
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"io/ioutil"
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"math"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"github.com/shirou/gopsutil/cpu"
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"github.com/shirou/gopsutil/host"
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"github.com/shirou/gopsutil/internal/common"
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"github.com/shirou/gopsutil/net"
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"golang.org/x/sys/unix"
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)
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var PageSize = uint64(os.Getpagesize())
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const (
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PrioProcess = 0 // linux/resource.h
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ClockTicks = 100 // C.sysconf(C._SC_CLK_TCK)
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)
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// MemoryInfoExStat is different between OSes
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type MemoryInfoExStat struct {
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RSS uint64 `json:"rss"` // bytes
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VMS uint64 `json:"vms"` // bytes
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Shared uint64 `json:"shared"` // bytes
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Text uint64 `json:"text"` // bytes
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Lib uint64 `json:"lib"` // bytes
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Data uint64 `json:"data"` // bytes
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Dirty uint64 `json:"dirty"` // bytes
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}
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func (m MemoryInfoExStat) String() string {
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s, _ := json.Marshal(m)
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return string(s)
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}
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type MemoryMapsStat struct {
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Path string `json:"path"`
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Rss uint64 `json:"rss"`
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Size uint64 `json:"size"`
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Pss uint64 `json:"pss"`
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SharedClean uint64 `json:"sharedClean"`
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SharedDirty uint64 `json:"sharedDirty"`
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PrivateClean uint64 `json:"privateClean"`
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PrivateDirty uint64 `json:"privateDirty"`
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Referenced uint64 `json:"referenced"`
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Anonymous uint64 `json:"anonymous"`
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Swap uint64 `json:"swap"`
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}
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// String returns JSON value of the process.
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func (m MemoryMapsStat) String() string {
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s, _ := json.Marshal(m)
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return string(s)
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}
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// NewProcess creates a new Process instance, it only stores the pid and
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// checks that the process exists. Other method on Process can be used
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// to get more information about the process. An error will be returned
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// if the process does not exist.
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func NewProcess(pid int32) (*Process, error) {
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p := &Process{
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Pid: int32(pid),
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}
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file, err := os.Open(common.HostProc(strconv.Itoa(int(p.Pid))))
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defer file.Close()
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return p, err
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}
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// Ppid returns Parent Process ID of the process.
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func (p *Process) Ppid() (int32, error) {
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return p.PpidWithContext(context.Background())
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}
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func (p *Process) PpidWithContext(ctx context.Context) (int32, error) {
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_, ppid, _, _, _, _, err := p.fillFromStat()
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if err != nil {
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return -1, err
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}
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return ppid, nil
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}
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// Name returns name of the process.
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func (p *Process) Name() (string, error) {
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return p.NameWithContext(context.Background())
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}
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func (p *Process) NameWithContext(ctx context.Context) (string, error) {
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if p.name == "" {
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if err := p.fillFromStatus(); err != nil {
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return "", err
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}
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}
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return p.name, nil
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}
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// Tgid returns tgid, a Linux-synonym for user-space Pid
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func (p *Process) Tgid() (int32, error) {
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if p.tgid == 0 {
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if err := p.fillFromStatus(); err != nil {
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return 0, err
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}
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}
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return p.tgid, nil
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}
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// Exe returns executable path of the process.
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func (p *Process) Exe() (string, error) {
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return p.ExeWithContext(context.Background())
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}
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func (p *Process) ExeWithContext(ctx context.Context) (string, error) {
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return p.fillFromExe()
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}
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// Cmdline returns the command line arguments of the process as a string with
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// each argument separated by 0x20 ascii character.
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func (p *Process) Cmdline() (string, error) {
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return p.CmdlineWithContext(context.Background())
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}
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func (p *Process) CmdlineWithContext(ctx context.Context) (string, error) {
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return p.fillFromCmdline()
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}
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// CmdlineSlice returns the command line arguments of the process as a slice with each
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// element being an argument.
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func (p *Process) CmdlineSlice() ([]string, error) {
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return p.CmdlineSliceWithContext(context.Background())
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}
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func (p *Process) CmdlineSliceWithContext(ctx context.Context) ([]string, error) {
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return p.fillSliceFromCmdline()
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}
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// CreateTime returns created time of the process in milliseconds since the epoch, in UTC.
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func (p *Process) CreateTime() (int64, error) {
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return p.CreateTimeWithContext(context.Background())
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}
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func (p *Process) CreateTimeWithContext(ctx context.Context) (int64, error) {
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_, _, _, createTime, _, _, err := p.fillFromStat()
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if err != nil {
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return 0, err
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}
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return createTime, nil
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}
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// Cwd returns current working directory of the process.
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func (p *Process) Cwd() (string, error) {
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return p.CwdWithContext(context.Background())
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}
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func (p *Process) CwdWithContext(ctx context.Context) (string, error) {
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return p.fillFromCwd()
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}
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// Parent returns parent Process of the process.
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func (p *Process) Parent() (*Process, error) {
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return p.ParentWithContext(context.Background())
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}
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func (p *Process) ParentWithContext(ctx context.Context) (*Process, error) {
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err := p.fillFromStatus()
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if err != nil {
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return nil, err
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}
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if p.parent == 0 {
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return nil, fmt.Errorf("wrong number of parents")
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}
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return NewProcess(p.parent)
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}
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// Status returns the process status.
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// Return value could be one of these.
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// R: Running S: Sleep T: Stop I: Idle
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// Z: Zombie W: Wait L: Lock
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// The charactor is same within all supported platforms.
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func (p *Process) Status() (string, error) {
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return p.StatusWithContext(context.Background())
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}
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func (p *Process) StatusWithContext(ctx context.Context) (string, error) {
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err := p.fillFromStatus()
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if err != nil {
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return "", err
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}
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return p.status, nil
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}
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// Uids returns user ids of the process as a slice of the int
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func (p *Process) Uids() ([]int32, error) {
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return p.UidsWithContext(context.Background())
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}
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func (p *Process) UidsWithContext(ctx context.Context) ([]int32, error) {
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err := p.fillFromStatus()
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if err != nil {
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return []int32{}, err
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}
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return p.uids, nil
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}
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// Gids returns group ids of the process as a slice of the int
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func (p *Process) Gids() ([]int32, error) {
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return p.GidsWithContext(context.Background())
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}
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func (p *Process) GidsWithContext(ctx context.Context) ([]int32, error) {
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err := p.fillFromStatus()
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if err != nil {
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return []int32{}, err
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}
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return p.gids, nil
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}
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// Terminal returns a terminal which is associated with the process.
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func (p *Process) Terminal() (string, error) {
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return p.TerminalWithContext(context.Background())
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}
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func (p *Process) TerminalWithContext(ctx context.Context) (string, error) {
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t, _, _, _, _, _, err := p.fillFromStat()
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if err != nil {
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return "", err
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}
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termmap, err := getTerminalMap()
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if err != nil {
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return "", err
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}
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terminal := termmap[t]
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return terminal, nil
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}
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// Nice returns a nice value (priority).
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// Notice: gopsutil can not set nice value.
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func (p *Process) Nice() (int32, error) {
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return p.NiceWithContext(context.Background())
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}
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func (p *Process) NiceWithContext(ctx context.Context) (int32, error) {
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_, _, _, _, _, nice, err := p.fillFromStat()
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if err != nil {
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return 0, err
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}
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return nice, nil
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}
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// IOnice returns process I/O nice value (priority).
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func (p *Process) IOnice() (int32, error) {
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return p.IOniceWithContext(context.Background())
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}
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func (p *Process) IOniceWithContext(ctx context.Context) (int32, error) {
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return 0, common.ErrNotImplementedError
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}
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// Rlimit returns Resource Limits.
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func (p *Process) Rlimit() ([]RlimitStat, error) {
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return p.RlimitWithContext(context.Background())
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}
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func (p *Process) RlimitWithContext(ctx context.Context) ([]RlimitStat, error) {
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return p.RlimitUsage(false)
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}
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// RlimitUsage returns Resource Limits.
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// If gatherUsed is true, the currently used value will be gathered and added
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// to the resulting RlimitStat.
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func (p *Process) RlimitUsage(gatherUsed bool) ([]RlimitStat, error) {
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return p.RlimitUsageWithContext(context.Background(), gatherUsed)
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}
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func (p *Process) RlimitUsageWithContext(ctx context.Context, gatherUsed bool) ([]RlimitStat, error) {
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rlimits, err := p.fillFromLimits()
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if !gatherUsed || err != nil {
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return rlimits, err
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}
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_, _, _, _, rtprio, nice, err := p.fillFromStat()
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if err != nil {
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return nil, err
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}
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if err := p.fillFromStatus(); err != nil {
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return nil, err
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}
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for i := range rlimits {
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rs := &rlimits[i]
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switch rs.Resource {
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case RLIMIT_CPU:
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times, err := p.Times()
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if err != nil {
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return nil, err
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}
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rs.Used = uint64(times.User + times.System)
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case RLIMIT_DATA:
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rs.Used = uint64(p.memInfo.Data)
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case RLIMIT_STACK:
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rs.Used = uint64(p.memInfo.Stack)
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case RLIMIT_RSS:
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rs.Used = uint64(p.memInfo.RSS)
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case RLIMIT_NOFILE:
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n, err := p.NumFDs()
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if err != nil {
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return nil, err
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}
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rs.Used = uint64(n)
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case RLIMIT_MEMLOCK:
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rs.Used = uint64(p.memInfo.Locked)
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case RLIMIT_AS:
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rs.Used = uint64(p.memInfo.VMS)
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case RLIMIT_LOCKS:
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//TODO we can get the used value from /proc/$pid/locks. But linux doesn't enforce it, so not a high priority.
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case RLIMIT_SIGPENDING:
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rs.Used = p.sigInfo.PendingProcess
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case RLIMIT_NICE:
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// The rlimit for nice is a little unusual, in that 0 means the niceness cannot be decreased beyond the current value, but it can be increased.
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// So effectively: if rs.Soft == 0 { rs.Soft = rs.Used }
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rs.Used = uint64(nice)
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case RLIMIT_RTPRIO:
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rs.Used = uint64(rtprio)
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}
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}
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return rlimits, err
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}
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// IOCounters returns IO Counters.
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func (p *Process) IOCounters() (*IOCountersStat, error) {
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return p.IOCountersWithContext(context.Background())
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}
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func (p *Process) IOCountersWithContext(ctx context.Context) (*IOCountersStat, error) {
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return p.fillFromIO()
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}
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// NumCtxSwitches returns the number of the context switches of the process.
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func (p *Process) NumCtxSwitches() (*NumCtxSwitchesStat, error) {
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return p.NumCtxSwitchesWithContext(context.Background())
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}
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func (p *Process) NumCtxSwitchesWithContext(ctx context.Context) (*NumCtxSwitchesStat, error) {
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err := p.fillFromStatus()
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if err != nil {
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return nil, err
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}
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return p.numCtxSwitches, nil
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}
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// NumFDs returns the number of File Descriptors used by the process.
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func (p *Process) NumFDs() (int32, error) {
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return p.NumFDsWithContext(context.Background())
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}
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func (p *Process) NumFDsWithContext(ctx context.Context) (int32, error) {
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_, fnames, err := p.fillFromfdList()
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return int32(len(fnames)), err
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}
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// NumThreads returns the number of threads used by the process.
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func (p *Process) NumThreads() (int32, error) {
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return p.NumThreadsWithContext(context.Background())
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}
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func (p *Process) NumThreadsWithContext(ctx context.Context) (int32, error) {
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err := p.fillFromStatus()
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if err != nil {
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return 0, err
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}
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return p.numThreads, nil
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}
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func (p *Process) Threads() (map[int32]*cpu.TimesStat, error) {
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return p.ThreadsWithContext(context.Background())
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}
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func (p *Process) ThreadsWithContext(ctx context.Context) (map[int32]*cpu.TimesStat, error) {
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ret := make(map[int32]*cpu.TimesStat)
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taskPath := common.HostProc(strconv.Itoa(int(p.Pid)), "task")
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tids, err := readPidsFromDir(taskPath)
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if err != nil {
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return nil, err
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}
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for _, tid := range tids {
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_, _, cpuTimes, _, _, _, err := p.fillFromTIDStat(tid)
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if err != nil {
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return nil, err
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}
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ret[tid] = cpuTimes
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}
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return ret, nil
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}
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// Times returns CPU times of the process.
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func (p *Process) Times() (*cpu.TimesStat, error) {
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return p.TimesWithContext(context.Background())
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}
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func (p *Process) TimesWithContext(ctx context.Context) (*cpu.TimesStat, error) {
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_, _, cpuTimes, _, _, _, err := p.fillFromStat()
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if err != nil {
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return nil, err
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}
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return cpuTimes, nil
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}
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// CPUAffinity returns CPU affinity of the process.
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//
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// Notice: Not implemented yet.
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func (p *Process) CPUAffinity() ([]int32, error) {
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return p.CPUAffinityWithContext(context.Background())
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}
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func (p *Process) CPUAffinityWithContext(ctx context.Context) ([]int32, error) {
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return nil, common.ErrNotImplementedError
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}
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// MemoryInfo returns platform in-dependend memory information, such as RSS, VMS and Swap
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func (p *Process) MemoryInfo() (*MemoryInfoStat, error) {
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return p.MemoryInfoWithContext(context.Background())
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}
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func (p *Process) MemoryInfoWithContext(ctx context.Context) (*MemoryInfoStat, error) {
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meminfo, _, err := p.fillFromStatm()
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if err != nil {
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return nil, err
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}
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return meminfo, nil
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}
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// MemoryInfoEx returns platform dependend memory information.
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func (p *Process) MemoryInfoEx() (*MemoryInfoExStat, error) {
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return p.MemoryInfoExWithContext(context.Background())
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}
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func (p *Process) MemoryInfoExWithContext(ctx context.Context) (*MemoryInfoExStat, error) {
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_, memInfoEx, err := p.fillFromStatm()
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if err != nil {
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return nil, err
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}
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return memInfoEx, nil
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}
|
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|
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// Children returns a slice of Process of the process.
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func (p *Process) Children() ([]*Process, error) {
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return p.ChildrenWithContext(context.Background())
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}
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func (p *Process) ChildrenWithContext(ctx context.Context) ([]*Process, error) {
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pids, err := common.CallPgrepWithContext(ctx, invoke, p.Pid)
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if err != nil {
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if pids == nil || len(pids) == 0 {
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return nil, ErrorNoChildren
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}
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return nil, err
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}
|
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ret := make([]*Process, 0, len(pids))
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for _, pid := range pids {
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np, err := NewProcess(pid)
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if err != nil {
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return nil, err
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}
|
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ret = append(ret, np)
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}
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return ret, nil
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}
|
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|
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// OpenFiles returns a slice of OpenFilesStat opend by the process.
|
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// OpenFilesStat includes a file path and file descriptor.
|
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func (p *Process) OpenFiles() ([]OpenFilesStat, error) {
|
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return p.OpenFilesWithContext(context.Background())
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}
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func (p *Process) OpenFilesWithContext(ctx context.Context) ([]OpenFilesStat, error) {
|
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_, ofs, err := p.fillFromfd()
|
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if err != nil {
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return nil, err
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}
|
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ret := make([]OpenFilesStat, len(ofs))
|
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for i, o := range ofs {
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ret[i] = *o
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}
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return ret, nil
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}
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|
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// Connections returns a slice of net.ConnectionStat used by the process.
|
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// This returns all kind of the connection. This measn TCP, UDP or UNIX.
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func (p *Process) Connections() ([]net.ConnectionStat, error) {
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return p.ConnectionsWithContext(context.Background())
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}
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|
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func (p *Process) ConnectionsWithContext(ctx context.Context) ([]net.ConnectionStat, error) {
|
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return net.ConnectionsPid("all", p.Pid)
|
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}
|
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|
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// NetIOCounters returns NetIOCounters of the process.
|
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func (p *Process) NetIOCounters(pernic bool) ([]net.IOCountersStat, error) {
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return p.NetIOCountersWithContext(context.Background(), pernic)
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}
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|
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func (p *Process) NetIOCountersWithContext(ctx context.Context, pernic bool) ([]net.IOCountersStat, error) {
|
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filename := common.HostProc(strconv.Itoa(int(p.Pid)), "net/dev")
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return net.IOCountersByFile(pernic, filename)
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}
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|
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// IsRunning returns whether the process is running or not.
|
|
// Not implemented yet.
|
|
func (p *Process) IsRunning() (bool, error) {
|
|
return p.IsRunningWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) IsRunningWithContext(ctx context.Context) (bool, error) {
|
|
return true, common.ErrNotImplementedError
|
|
}
|
|
|
|
// MemoryMaps get memory maps from /proc/(pid)/smaps
|
|
func (p *Process) MemoryMaps(grouped bool) (*[]MemoryMapsStat, error) {
|
|
return p.MemoryMapsWithContext(context.Background(), grouped)
|
|
}
|
|
|
|
func (p *Process) MemoryMapsWithContext(ctx context.Context, 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
|
|
}
|
|
|
|
/**
|
|
** Internal functions
|
|
**/
|
|
|
|
func limitToInt(val string) (int32, error) {
|
|
if val == "unlimited" {
|
|
return math.MaxInt32, nil
|
|
} else {
|
|
res, err := strconv.ParseInt(val, 10, 32)
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
return int32(res), nil
|
|
}
|
|
}
|
|
|
|
// Get num_fds from /proc/(pid)/limits
|
|
func (p *Process) fillFromLimits() ([]RlimitStat, error) {
|
|
return p.fillFromLimitsWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) fillFromLimitsWithContext(ctx context.Context) ([]RlimitStat, error) {
|
|
pid := p.Pid
|
|
limitsFile := common.HostProc(strconv.Itoa(int(pid)), "limits")
|
|
d, err := os.Open(limitsFile)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
defer d.Close()
|
|
|
|
var limitStats []RlimitStat
|
|
|
|
limitsScanner := bufio.NewScanner(d)
|
|
for limitsScanner.Scan() {
|
|
var statItem RlimitStat
|
|
|
|
str := strings.Fields(limitsScanner.Text())
|
|
|
|
// Remove the header line
|
|
if strings.Contains(str[len(str)-1], "Units") {
|
|
continue
|
|
}
|
|
|
|
// Assert that last item is a Hard limit
|
|
statItem.Hard, err = limitToInt(str[len(str)-1])
|
|
if err != nil {
|
|
// On error remove last item an try once again since it can be unit or header line
|
|
str = str[:len(str)-1]
|
|
statItem.Hard, err = limitToInt(str[len(str)-1])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
}
|
|
// Remove last item from string
|
|
str = str[:len(str)-1]
|
|
|
|
//Now last item is a Soft limit
|
|
statItem.Soft, err = limitToInt(str[len(str)-1])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
// Remove last item from string
|
|
str = str[:len(str)-1]
|
|
|
|
//The rest is a stats name
|
|
resourceName := strings.Join(str, " ")
|
|
switch resourceName {
|
|
case "Max cpu time":
|
|
statItem.Resource = RLIMIT_CPU
|
|
case "Max file size":
|
|
statItem.Resource = RLIMIT_FSIZE
|
|
case "Max data size":
|
|
statItem.Resource = RLIMIT_DATA
|
|
case "Max stack size":
|
|
statItem.Resource = RLIMIT_STACK
|
|
case "Max core file size":
|
|
statItem.Resource = RLIMIT_CORE
|
|
case "Max resident set":
|
|
statItem.Resource = RLIMIT_RSS
|
|
case "Max processes":
|
|
statItem.Resource = RLIMIT_NPROC
|
|
case "Max open files":
|
|
statItem.Resource = RLIMIT_NOFILE
|
|
case "Max locked memory":
|
|
statItem.Resource = RLIMIT_MEMLOCK
|
|
case "Max address space":
|
|
statItem.Resource = RLIMIT_AS
|
|
case "Max file locks":
|
|
statItem.Resource = RLIMIT_LOCKS
|
|
case "Max pending signals":
|
|
statItem.Resource = RLIMIT_SIGPENDING
|
|
case "Max msgqueue size":
|
|
statItem.Resource = RLIMIT_MSGQUEUE
|
|
case "Max nice priority":
|
|
statItem.Resource = RLIMIT_NICE
|
|
case "Max realtime priority":
|
|
statItem.Resource = RLIMIT_RTPRIO
|
|
case "Max realtime timeout":
|
|
statItem.Resource = RLIMIT_RTTIME
|
|
default:
|
|
continue
|
|
}
|
|
|
|
limitStats = append(limitStats, statItem)
|
|
}
|
|
|
|
if err := limitsScanner.Err(); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return limitStats, nil
|
|
}
|
|
|
|
// Get list of /proc/(pid)/fd files
|
|
func (p *Process) fillFromfdList() (string, []string, error) {
|
|
return p.fillFromfdListWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) fillFromfdListWithContext(ctx context.Context) (string, []string, error) {
|
|
pid := p.Pid
|
|
statPath := common.HostProc(strconv.Itoa(int(pid)), "fd")
|
|
d, err := os.Open(statPath)
|
|
if err != nil {
|
|
return statPath, []string{}, err
|
|
}
|
|
defer d.Close()
|
|
fnames, err := d.Readdirnames(-1)
|
|
return statPath, fnames, err
|
|
}
|
|
|
|
// Get num_fds from /proc/(pid)/fd
|
|
func (p *Process) fillFromfd() (int32, []*OpenFilesStat, error) {
|
|
return p.fillFromfdWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) fillFromfdWithContext(ctx context.Context) (int32, []*OpenFilesStat, error) {
|
|
statPath, fnames, err := p.fillFromfdList()
|
|
if err != nil {
|
|
return 0, nil, err
|
|
}
|
|
numFDs := int32(len(fnames))
|
|
|
|
var openfiles []*OpenFilesStat
|
|
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) {
|
|
return p.fillFromCwdWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) fillFromCwdWithContext(ctx context.Context) (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
|
|
}
|
|
|
|
// Get exe from /proc/(pid)/exe
|
|
func (p *Process) fillFromExe() (string, error) {
|
|
return p.fillFromExeWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) fillFromExeWithContext(ctx context.Context) (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 cmdline from /proc/(pid)/cmdline
|
|
func (p *Process) fillFromCmdline() (string, error) {
|
|
return p.fillFromCmdlineWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) fillFromCmdlineWithContext(ctx context.Context) (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
|
|
}
|
|
|
|
func (p *Process) fillSliceFromCmdline() ([]string, error) {
|
|
return p.fillSliceFromCmdlineWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) fillSliceFromCmdlineWithContext(ctx context.Context) ([]string, error) {
|
|
pid := p.Pid
|
|
cmdPath := common.HostProc(strconv.Itoa(int(pid)), "cmdline")
|
|
cmdline, err := ioutil.ReadFile(cmdPath)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
if len(cmdline) == 0 {
|
|
return nil, nil
|
|
}
|
|
if cmdline[len(cmdline)-1] == 0 {
|
|
cmdline = cmdline[:len(cmdline)-1]
|
|
}
|
|
parts := bytes.Split(cmdline, []byte{0})
|
|
var strParts []string
|
|
for _, p := range parts {
|
|
strParts = append(strParts, string(p))
|
|
}
|
|
|
|
return strParts, nil
|
|
}
|
|
|
|
// Get IO status from /proc/(pid)/io
|
|
func (p *Process) fillFromIO() (*IOCountersStat, error) {
|
|
return p.fillFromIOWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) fillFromIOWithContext(ctx context.Context) (*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
|
|
}
|
|
|
|
// Get memory info from /proc/(pid)/statm
|
|
func (p *Process) fillFromStatm() (*MemoryInfoStat, *MemoryInfoExStat, error) {
|
|
return p.fillFromStatmWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) fillFromStatmWithContext(ctx context.Context) (*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 various status from /proc/(pid)/status
|
|
func (p *Process) fillFromStatus() error {
|
|
return p.fillFromStatusWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) fillFromStatusWithContext(ctx context.Context) 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{}
|
|
p.sigInfo = &SignalInfoStat{}
|
|
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")
|
|
if len(p.name) >= 15 {
|
|
cmdlineSlice, err := p.CmdlineSlice()
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if len(cmdlineSlice) > 0 {
|
|
extendedName := filepath.Base(cmdlineSlice[0])
|
|
if strings.HasPrefix(extendedName, p.name) {
|
|
p.name = extendedName
|
|
} else {
|
|
p.name = cmdlineSlice[0]
|
|
}
|
|
}
|
|
}
|
|
case "State":
|
|
p.status = value[0:1]
|
|
case "PPid", "Ppid":
|
|
pval, err := strconv.ParseInt(value, 10, 32)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.parent = int32(pval)
|
|
case "Tgid":
|
|
pval, err := strconv.ParseInt(value, 10, 32)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.tgid = int32(pval)
|
|
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
|
|
case "VmData":
|
|
value := strings.Trim(value, " kB") // remove last "kB"
|
|
v, err := strconv.ParseUint(value, 10, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.memInfo.Data = v * 1024
|
|
case "VmStk":
|
|
value := strings.Trim(value, " kB") // remove last "kB"
|
|
v, err := strconv.ParseUint(value, 10, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.memInfo.Stack = v * 1024
|
|
case "VmLck":
|
|
value := strings.Trim(value, " kB") // remove last "kB"
|
|
v, err := strconv.ParseUint(value, 10, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.memInfo.Locked = v * 1024
|
|
case "SigPnd":
|
|
v, err := strconv.ParseUint(value, 16, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.sigInfo.PendingThread = v
|
|
case "ShdPnd":
|
|
v, err := strconv.ParseUint(value, 16, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.sigInfo.PendingProcess = v
|
|
case "SigBlk":
|
|
v, err := strconv.ParseUint(value, 16, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.sigInfo.Blocked = v
|
|
case "SigIgn":
|
|
v, err := strconv.ParseUint(value, 16, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.sigInfo.Ignored = v
|
|
case "SigCgt":
|
|
v, err := strconv.ParseUint(value, 16, 64)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
p.sigInfo.Caught = v
|
|
}
|
|
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (p *Process) fillFromTIDStat(tid int32) (uint64, int32, *cpu.TimesStat, int64, uint32, int32, error) {
|
|
return p.fillFromTIDStatWithContext(context.Background(), tid)
|
|
}
|
|
|
|
func (p *Process) fillFromTIDStatWithContext(ctx context.Context, tid int32) (uint64, int32, *cpu.TimesStat, int64, uint32, int32, error) {
|
|
pid := p.Pid
|
|
var statPath string
|
|
|
|
if tid == -1 {
|
|
statPath = common.HostProc(strconv.Itoa(int(pid)), "stat")
|
|
} else {
|
|
statPath = common.HostProc(strconv.Itoa(int(pid)), "task", strconv.Itoa(int(tid)), "stat")
|
|
}
|
|
|
|
contents, err := ioutil.ReadFile(statPath)
|
|
if err != nil {
|
|
return 0, 0, nil, 0, 0, 0, err
|
|
}
|
|
fields := strings.Fields(string(contents))
|
|
|
|
i := 1
|
|
for !strings.HasSuffix(fields[i], ")") {
|
|
i++
|
|
}
|
|
|
|
terminal, err := strconv.ParseUint(fields[i+5], 10, 64)
|
|
if err != nil {
|
|
return 0, 0, nil, 0, 0, 0, err
|
|
}
|
|
|
|
ppid, err := strconv.ParseInt(fields[i+2], 10, 32)
|
|
if err != nil {
|
|
return 0, 0, nil, 0, 0, 0, err
|
|
}
|
|
utime, err := strconv.ParseFloat(fields[i+12], 64)
|
|
if err != nil {
|
|
return 0, 0, nil, 0, 0, 0, err
|
|
}
|
|
|
|
stime, err := strconv.ParseFloat(fields[i+13], 64)
|
|
if err != nil {
|
|
return 0, 0, nil, 0, 0, 0, err
|
|
}
|
|
|
|
cpuTimes := &cpu.TimesStat{
|
|
CPU: "cpu",
|
|
User: float64(utime / ClockTicks),
|
|
System: float64(stime / ClockTicks),
|
|
}
|
|
|
|
bootTime, _ := host.BootTime()
|
|
t, err := strconv.ParseUint(fields[i+20], 10, 64)
|
|
if err != nil {
|
|
return 0, 0, nil, 0, 0, 0, err
|
|
}
|
|
ctime := (t / uint64(ClockTicks)) + uint64(bootTime)
|
|
createTime := int64(ctime * 1000)
|
|
|
|
rtpriority, err := strconv.ParseInt(fields[i+16], 10, 32)
|
|
if err != nil {
|
|
return 0, 0, nil, 0, 0, 0, err
|
|
}
|
|
if rtpriority < 0 {
|
|
rtpriority = rtpriority*-1 - 1
|
|
} else {
|
|
rtpriority = 0
|
|
}
|
|
|
|
// p.Nice = mustParseInt32(fields[18])
|
|
// use syscall instead of parse Stat file
|
|
snice, _ := unix.Getpriority(PrioProcess, int(pid))
|
|
nice := int32(snice) // FIXME: is this true?
|
|
|
|
return terminal, int32(ppid), cpuTimes, createTime, uint32(rtpriority), nice, nil
|
|
}
|
|
|
|
func (p *Process) fillFromStat() (uint64, int32, *cpu.TimesStat, int64, uint32, int32, error) {
|
|
return p.fillFromStatWithContext(context.Background())
|
|
}
|
|
|
|
func (p *Process) fillFromStatWithContext(ctx context.Context) (uint64, int32, *cpu.TimesStat, int64, uint32, int32, error) {
|
|
return p.fillFromTIDStat(-1)
|
|
}
|
|
|
|
// Pids returns a slice of process ID list which are running now.
|
|
func Pids() ([]int32, error) {
|
|
return PidsWithContext(context.Background())
|
|
}
|
|
|
|
func PidsWithContext(ctx context.Context) ([]int32, error) {
|
|
return readPidsFromDir(common.HostProc())
|
|
}
|
|
|
|
// Process returns a slice of pointers to Process structs for all
|
|
// currently running processes.
|
|
func Processes() ([]*Process, error) {
|
|
return ProcessesWithContext(context.Background())
|
|
}
|
|
|
|
func ProcessesWithContext(ctx context.Context) ([]*Process, error) {
|
|
out := []*Process{}
|
|
|
|
pids, err := PidsWithContext(ctx)
|
|
if err != nil {
|
|
return out, err
|
|
}
|
|
|
|
for _, pid := range pids {
|
|
p, err := NewProcess(pid)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
out = append(out, p)
|
|
}
|
|
|
|
return out, nil
|
|
}
|
|
|
|
func readPidsFromDir(path string) ([]int32, error) {
|
|
var ret []int32
|
|
|
|
d, err := os.Open(path)
|
|
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
|
|
}
|