golang使用execCommand调用的时候子进程如何杀掉处理方法

最近在写一个应用,下面是用到的代码,网上也有挺多的网友遇到这种问题,下面是我的解决方法,分享一下.

使用方法,想exec.Command的时候使用SetPgid设置进程组,杀的时候使用KillAll杀死全部调用产生的进程

代码实现:

Linux处理方法：

package system

import (
	"syscall"
)

func SetPgid(pid,pgid int) error {
	return syscall.Setpgid(pid,pgid)
}

func GetPPids(pid int) ([]int,error) {
	return []int{},nil
}

func Kill(pids []uint32) {
	for _,pid := range pids {
		syscall.Kill(int(pid),syscall.SIGKILL)
	}
}

func KillAll(pid int) error {
	return syscall.Kill(pid-(pid*2),syscall.SIGKILL)
}

Windows处理方法：

package system

import (
	"os"
	"syscall"
	"unsafe"
)

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 SetPgid(pid,pgid int) error {
	return nil
}

func KillAll(pid int) error {
	pids := Getppids(uint32(pid))
	Kill(pids)
	return nil
}

func Kill(pids []uint32) {
	for _,pid := range pids {
		pro,err := os.FindProcess(int(pid))
		if err != nil {
			continue
		}
		pro.Kill()
	}
}

func Getppids(pid uint32) []uint32 {
	infos,err := GetProcs()
	if err != nil {
		return []uint32{pid}
	}
	var pids []uint32 = make([]uint32,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] {
				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,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,_ := procProcess32Next.Call(
		uintptr(snapshot),uintptr(unsafe.Pointer(pe)))

	return ret != 0
}

func closeHandle(object HANDLE) bool {
	ret,_ := procCloseHandle.Call(
		uintptr(object))
	return ret != 0
}

（编辑：李大同）

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