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438 lines
12 KiB
438 lines
12 KiB
7 years ago
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// Copyright (c) 2012 VMware, Inc.
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package gosigar
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import (
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"fmt"
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"os"
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"path/filepath"
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"runtime"
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"strings"
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"sync"
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"syscall"
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"time"
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"github.com/StackExchange/wmi"
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"github.com/elastic/gosigar/sys/windows"
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"github.com/pkg/errors"
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)
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// Win32_Process represents a process on the Windows operating system. If
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// additional fields are added here (that match the Windows struct) they will
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// automatically be populated when calling getWin32Process.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa394372(v=vs.85).aspx
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type Win32_Process struct {
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CommandLine string
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}
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// Win32_OperatingSystem WMI class represents a Windows-based operating system
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// installed on a computer.
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// https://msdn.microsoft.com/en-us/library/windows/desktop/aa394239(v=vs.85).aspx
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type Win32_OperatingSystem struct {
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LastBootUpTime time.Time
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}
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var (
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// version is Windows version of the host OS.
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version = windows.GetWindowsVersion()
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// processQueryLimitedInfoAccess is set to PROCESS_QUERY_INFORMATION for Windows
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// 2003 and XP where PROCESS_QUERY_LIMITED_INFORMATION is unknown. For all newer
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// OS versions it is set to PROCESS_QUERY_LIMITED_INFORMATION.
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processQueryLimitedInfoAccess = windows.PROCESS_QUERY_LIMITED_INFORMATION
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// bootTime is the time when the OS was last booted. This value may be nil
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// on operating systems that do not support the WMI query used to obtain it.
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bootTime *time.Time
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bootTimeLock sync.Mutex
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)
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func init() {
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if !version.IsWindowsVistaOrGreater() {
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// PROCESS_QUERY_LIMITED_INFORMATION cannot be used on 2003 or XP.
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processQueryLimitedInfoAccess = syscall.PROCESS_QUERY_INFORMATION
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}
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}
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func (self *LoadAverage) Get() error {
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return ErrNotImplemented{runtime.GOOS}
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}
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func (self *FDUsage) Get() error {
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return ErrNotImplemented{runtime.GOOS}
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}
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func (self *ProcEnv) Get(pid int) error {
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return ErrNotImplemented{runtime.GOOS}
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}
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func (self *ProcExe) Get(pid int) error {
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return ErrNotImplemented{runtime.GOOS}
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}
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func (self *ProcFDUsage) Get(pid int) error {
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return ErrNotImplemented{runtime.GOOS}
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}
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func (self *Uptime) Get() error {
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// Minimum supported OS is Windows Vista.
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if !version.IsWindowsVistaOrGreater() {
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return ErrNotImplemented{runtime.GOOS}
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}
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bootTimeLock.Lock()
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defer bootTimeLock.Unlock()
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if bootTime == nil {
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os, err := getWin32OperatingSystem()
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if err != nil {
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return errors.Wrap(err, "failed to get boot time using WMI")
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}
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bootTime = &os.LastBootUpTime
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}
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self.Length = time.Since(*bootTime).Seconds()
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return nil
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}
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func (self *Mem) Get() error {
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memoryStatusEx, err := windows.GlobalMemoryStatusEx()
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if err != nil {
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return errors.Wrap(err, "GlobalMemoryStatusEx failed")
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}
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self.Total = memoryStatusEx.TotalPhys
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self.Free = memoryStatusEx.AvailPhys
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self.Used = self.Total - self.Free
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self.ActualFree = self.Free
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self.ActualUsed = self.Used
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return nil
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}
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func (self *Swap) Get() error {
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memoryStatusEx, err := windows.GlobalMemoryStatusEx()
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if err != nil {
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return errors.Wrap(err, "GlobalMemoryStatusEx failed")
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}
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self.Total = memoryStatusEx.TotalPageFile
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self.Free = memoryStatusEx.AvailPageFile
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self.Used = self.Total - self.Free
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return nil
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}
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func (self *Cpu) Get() error {
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idle, kernel, user, err := windows.GetSystemTimes()
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if err != nil {
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return errors.Wrap(err, "GetSystemTimes failed")
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}
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// CPU times are reported in milliseconds by gosigar.
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self.Idle = uint64(idle / time.Millisecond)
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self.Sys = uint64(kernel / time.Millisecond)
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self.User = uint64(user / time.Millisecond)
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return nil
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}
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func (self *CpuList) Get() error {
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cpus, err := windows.NtQuerySystemProcessorPerformanceInformation()
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if err != nil {
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return errors.Wrap(err, "NtQuerySystemProcessorPerformanceInformation failed")
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}
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self.List = make([]Cpu, 0, len(cpus))
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for _, cpu := range cpus {
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self.List = append(self.List, Cpu{
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Idle: uint64(cpu.IdleTime / time.Millisecond),
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Sys: uint64(cpu.KernelTime / time.Millisecond),
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User: uint64(cpu.UserTime / time.Millisecond),
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})
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}
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return nil
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}
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func (self *FileSystemList) Get() error {
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drives, err := windows.GetLogicalDriveStrings()
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if err != nil {
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return errors.Wrap(err, "GetLogicalDriveStrings failed")
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}
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for _, drive := range drives {
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dt, err := windows.GetDriveType(drive)
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if err != nil {
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return errors.Wrapf(err, "GetDriveType failed")
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}
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self.List = append(self.List, FileSystem{
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DirName: drive,
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DevName: drive,
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TypeName: dt.String(),
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})
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}
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return nil
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}
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// Get retrieves a list of all process identifiers (PIDs) in the system.
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func (self *ProcList) Get() error {
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pids, err := windows.EnumProcesses()
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if err != nil {
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return errors.Wrap(err, "EnumProcesses failed")
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}
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// Convert uint32 PIDs to int.
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self.List = make([]int, 0, len(pids))
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for _, pid := range pids {
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self.List = append(self.List, int(pid))
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}
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return nil
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}
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func (self *ProcState) Get(pid int) error {
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var errs []error
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var err error
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self.Name, err = getProcName(pid)
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if err != nil {
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errs = append(errs, errors.Wrap(err, "getProcName failed"))
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}
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self.State, err = getProcStatus(pid)
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if err != nil {
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errs = append(errs, errors.Wrap(err, "getProcStatus failed"))
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}
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self.Ppid, err = getParentPid(pid)
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if err != nil {
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errs = append(errs, errors.Wrap(err, "getParentPid failed"))
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}
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self.Username, err = getProcCredName(pid)
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if err != nil {
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errs = append(errs, errors.Wrap(err, "getProcCredName failed"))
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}
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if len(errs) > 0 {
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errStrs := make([]string, 0, len(errs))
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for _, e := range errs {
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errStrs = append(errStrs, e.Error())
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}
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return errors.New(strings.Join(errStrs, "; "))
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}
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return nil
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}
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// getProcName returns the process name associated with the PID.
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func getProcName(pid int) (string, error) {
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handle, err := syscall.OpenProcess(processQueryLimitedInfoAccess, false, uint32(pid))
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if err != nil {
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return "", errors.Wrapf(err, "OpenProcess failed for pid=%v", pid)
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}
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defer syscall.CloseHandle(handle)
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filename, err := windows.GetProcessImageFileName(handle)
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if err != nil {
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return "", errors.Wrapf(err, "GetProcessImageFileName failed for pid=%v", pid)
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}
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return filepath.Base(filename), nil
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}
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// getProcStatus returns the status of a process.
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func getProcStatus(pid int) (RunState, error) {
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handle, err := syscall.OpenProcess(processQueryLimitedInfoAccess, false, uint32(pid))
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if err != nil {
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return RunStateUnknown, errors.Wrapf(err, "OpenProcess failed for pid=%v", pid)
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}
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defer syscall.CloseHandle(handle)
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var exitCode uint32
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err = syscall.GetExitCodeProcess(handle, &exitCode)
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if err != nil {
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return RunStateUnknown, errors.Wrapf(err, "GetExitCodeProcess failed for pid=%v")
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}
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if exitCode == 259 { //still active
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return RunStateRun, nil
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}
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return RunStateSleep, nil
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}
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// getParentPid returns the parent process ID of a process.
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func getParentPid(pid int) (int, error) {
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handle, err := syscall.OpenProcess(processQueryLimitedInfoAccess, false, uint32(pid))
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if err != nil {
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return RunStateUnknown, errors.Wrapf(err, "OpenProcess failed for pid=%v", pid)
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}
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defer syscall.CloseHandle(handle)
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procInfo, err := windows.NtQueryProcessBasicInformation(handle)
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if err != nil {
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return 0, errors.Wrapf(err, "NtQueryProcessBasicInformation failed for pid=%v", pid)
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}
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return int(procInfo.InheritedFromUniqueProcessID), nil
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}
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func getProcCredName(pid int) (string, error) {
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handle, err := syscall.OpenProcess(syscall.PROCESS_QUERY_INFORMATION, false, uint32(pid))
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if err != nil {
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return "", errors.Wrapf(err, "OpenProcess failed for pid=%v", pid)
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}
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defer syscall.CloseHandle(handle)
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// Find process token via win32.
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var token syscall.Token
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err = syscall.OpenProcessToken(handle, syscall.TOKEN_QUERY, &token)
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if err != nil {
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return "", errors.Wrapf(err, "OpenProcessToken failed for pid=%v", pid)
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}
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// Find the token user.
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tokenUser, err := token.GetTokenUser()
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if err != nil {
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return "", errors.Wrapf(err, "GetTokenInformation failed for pid=%v", pid)
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}
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// Close token to prevent handle leaks.
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err = token.Close()
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if err != nil {
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return "", errors.Wrapf(err, "failed while closing process token handle for pid=%v", pid)
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}
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// Look up domain account by SID.
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account, domain, _, err := tokenUser.User.Sid.LookupAccount("")
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if err != nil {
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sid, sidErr := tokenUser.User.Sid.String()
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if sidErr != nil {
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return "", errors.Wrapf(err, "failed while looking up account name for pid=%v", pid)
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}
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return "", errors.Wrapf(err, "failed while looking up account name for SID=%v of pid=%v", sid, pid)
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}
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return fmt.Sprintf(`%s\%s`, domain, account), nil
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}
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func (self *ProcMem) Get(pid int) error {
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handle, err := syscall.OpenProcess(processQueryLimitedInfoAccess|windows.PROCESS_VM_READ, false, uint32(pid))
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if err != nil {
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return errors.Wrapf(err, "OpenProcess failed for pid=%v", pid)
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}
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defer syscall.CloseHandle(handle)
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counters, err := windows.GetProcessMemoryInfo(handle)
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if err != nil {
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return errors.Wrapf(err, "GetProcessMemoryInfo failed for pid=%v", pid)
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}
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self.Resident = uint64(counters.WorkingSetSize)
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self.Size = uint64(counters.PrivateUsage)
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return nil
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}
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func (self *ProcTime) Get(pid int) error {
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cpu, err := getProcTimes(pid)
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if err != nil {
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return err
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}
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// Windows epoch times are expressed as time elapsed since midnight on
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// January 1, 1601 at Greenwich, England. This converts the Filetime to
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// unix epoch in milliseconds.
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self.StartTime = uint64(cpu.CreationTime.Nanoseconds() / 1e6)
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// Convert to millis.
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self.User = uint64(windows.FiletimeToDuration(&cpu.UserTime).Nanoseconds() / 1e6)
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self.Sys = uint64(windows.FiletimeToDuration(&cpu.KernelTime).Nanoseconds() / 1e6)
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self.Total = self.User + self.Sys
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return nil
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}
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func getProcTimes(pid int) (*syscall.Rusage, error) {
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handle, err := syscall.OpenProcess(processQueryLimitedInfoAccess, false, uint32(pid))
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if err != nil {
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return nil, errors.Wrapf(err, "OpenProcess failed for pid=%v", pid)
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}
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defer syscall.CloseHandle(handle)
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var cpu syscall.Rusage
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if err := syscall.GetProcessTimes(handle, &cpu.CreationTime, &cpu.ExitTime, &cpu.KernelTime, &cpu.UserTime); err != nil {
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return nil, errors.Wrapf(err, "GetProcessTimes failed for pid=%v", pid)
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}
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return &cpu, nil
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}
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func (self *ProcArgs) Get(pid int) error {
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// The minimum supported client for Win32_Process is Windows Vista.
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if !version.IsWindowsVistaOrGreater() {
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return ErrNotImplemented{runtime.GOOS}
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}
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process, err := getWin32Process(int32(pid))
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if err != nil {
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return errors.Wrapf(err, "ProcArgs failed for pid=%v", pid)
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}
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self.List = []string{process.CommandLine}
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return nil
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}
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func (self *FileSystemUsage) Get(path string) error {
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freeBytesAvailable, totalNumberOfBytes, totalNumberOfFreeBytes, err := windows.GetDiskFreeSpaceEx(path)
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if err != nil {
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return errors.Wrap(err, "GetDiskFreeSpaceEx failed")
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}
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self.Total = totalNumberOfBytes
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self.Free = totalNumberOfFreeBytes
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self.Used = self.Total - self.Free
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self.Avail = freeBytesAvailable
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return nil
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}
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// getWin32Process gets information about the process with the given process ID.
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// It uses a WMI query to get the information from the local system.
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func getWin32Process(pid int32) (Win32_Process, error) {
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var dst []Win32_Process
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query := fmt.Sprintf("WHERE ProcessId = %d", pid)
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q := wmi.CreateQuery(&dst, query)
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err := wmi.Query(q, &dst)
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if err != nil {
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return Win32_Process{}, fmt.Errorf("could not get Win32_Process %s: %v", query, err)
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}
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if len(dst) < 1 {
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return Win32_Process{}, fmt.Errorf("could not get Win32_Process %s: Process not found", query)
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}
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return dst[0], nil
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}
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func getWin32OperatingSystem() (Win32_OperatingSystem, error) {
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var dst []Win32_OperatingSystem
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q := wmi.CreateQuery(&dst, "")
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err := wmi.Query(q, &dst)
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if err != nil {
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return Win32_OperatingSystem{}, errors.Wrap(err, "wmi query for Win32_OperatingSystem failed")
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}
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if len(dst) != 1 {
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return Win32_OperatingSystem{}, errors.New("wmi query for Win32_OperatingSystem failed")
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}
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return dst[0], nil
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}
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func (self *Rusage) Get(who int) error {
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if who != 0 {
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return ErrNotImplemented{runtime.GOOS}
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}
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pid := os.Getpid()
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cpu, err := getProcTimes(pid)
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if err != nil {
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return err
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}
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self.Utime = windows.FiletimeToDuration(&cpu.UserTime)
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self.Stime = windows.FiletimeToDuration(&cpu.KernelTime)
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return nil
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}
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