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// adapted from https://blog.csdn.net/fyxichen/article/details/51857864
package kill
import (
"golang.org/x/sys/windows"
"os"
"os/exec"
"syscall"
"unsafe"
)
const PROCESS_ALL_ACCESS = windows.STANDARD_RIGHTS_REQUIRED | windows.SYNCHRONIZE | 0xffff
func GetWindowsHandle(pid int) (handle windows.Handle, err error) {
handle, err = windows.OpenProcess(PROCESS_ALL_ACCESS, false, uint32(pid))
return
}
func GetCreationTime(pid int) (time int64, err error) {
handle, err := GetWindowsHandle(pid)
if err != nil {
return
}
defer closeHandle(HANDLE(handle))
var u syscall.Rusage
err = syscall.GetProcessTimes(syscall.Handle(handle), &u.CreationTime, &u.ExitTime, &u.KernelTime, &u.UserTime)
if err != nil {
return
}
time = u.CreationTime.Nanoseconds()
return
}
// Kill kills a process, along with any child processes it may have spawned.
func Kill(cmd *exec.Cmd) error {
if cmd.Process == nil {
// You can't kill a person with no body
return nil
}
ptime, err := GetCreationTime(cmd.Process.Pid)
if err != nil {
return err
}
pids := Getppids(uint32(cmd.Process.Pid), ptime)
for _, pid := range pids {
pro, err := os.FindProcess(int(pid))
if err != nil {
continue
}
pro.Kill()
}
return nil
}
// PrepareForChildren ensures that child processes of this parent process will share the same group id
// as the parent, meaning when the call Kill on the parent process, we'll kill
// the whole group, parent and children both. Gruesome when you think about it.
func PrepareForChildren(cmd *exec.Cmd) {
// do nothing because on windows our Kill function handles children by default.
}
const (
MAX_PATH = 260
TH32CS_SNAPPROCESS = 0x00000002
)
type ProcessInfo struct {
Name string
Pid uint32
PPid uint32
}
type PROCESSENTRY32 struct {
DwSize uint32
CntUsage uint32
Th32ProcessID uint32
Th32DefaultHeapID uintptr
Th32ModuleID uint32
CntThreads uint32
Th32ParentProcessID uint32
PcPriClassBase int32
DwFlags uint32
SzExeFile [MAX_PATH]uint16
}
type HANDLE uintptr
var (
modkernel32 = syscall.NewLazyDLL("kernel32.dll")
procCreateToolhelp32Snapshot = modkernel32.NewProc("CreateToolhelp32Snapshot")
procProcess32First = modkernel32.NewProc("Process32FirstW")
procProcess32Next = modkernel32.NewProc("Process32NextW")
procCloseHandle = modkernel32.NewProc("CloseHandle")
)
func Getppids(pid uint32, ptime int64) []uint32 {
infos, err := GetProcs()
if err != nil {
return []uint32{pid}
}
var pids []uint32 = make([]uint32, 0, len(infos))
var index int = 0
pids = append(pids, pid)
var length int = len(pids)
for index < length {
for _, info := range infos {
if info.PPid == pids[index] {
ctime, err := GetCreationTime(int(info.Pid))
if err != nil {
continue
}
if ctime >= ptime {
// Only appending if child is newer than parent, otherwise PPid was reused
pids = append(pids, info.Pid)
}
}
}
index += 1
length = len(pids)
}
return pids
}
func GetProcs() (procs []ProcessInfo, err error) {
snap := createToolhelp32Snapshot(TH32CS_SNAPPROCESS, uint32(0))
if snap == 0 {
err = syscall.GetLastError()
return
}
defer closeHandle(snap)
var pe32 PROCESSENTRY32
pe32.DwSize = uint32(unsafe.Sizeof(pe32))
if process32First(snap, &pe32) == false {
err = syscall.GetLastError()
return
}
procs = append(procs, ProcessInfo{syscall.UTF16ToString(pe32.SzExeFile[:260]), pe32.Th32ProcessID, pe32.Th32ParentProcessID})
for process32Next(snap, &pe32) {
procs = append(procs, ProcessInfo{syscall.UTF16ToString(pe32.SzExeFile[:260]), pe32.Th32ProcessID, pe32.Th32ParentProcessID})
}
return
}
func createToolhelp32Snapshot(flags, processId uint32) HANDLE {
ret, _, _ := procCreateToolhelp32Snapshot.Call(uintptr(flags), uintptr(processId))
if ret <= 0 {
return HANDLE(0)
}
return HANDLE(ret)
}
func process32First(snapshot HANDLE, pe *PROCESSENTRY32) bool {
ret, _, _ := procProcess32First.Call(uintptr(snapshot), uintptr(unsafe.Pointer(pe)))
return ret != 0
}
func process32Next(snapshot HANDLE, pe *PROCESSENTRY32) bool {
ret, _, _ := procProcess32Next.Call(uintptr(snapshot), uintptr(unsafe.Pointer(pe)))
return ret != 0
}
func closeHandle(object HANDLE) bool {
ret, _, _ := procCloseHandle.Call(uintptr(object))
return ret != 0
}
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