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// This file is part of PathsHelper library.
//
// Copyright 2018-2025 Arduino AG (http://www.arduino.cc/)
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <https://www.gnu.org/licenses/>.
//
// You can be released from the requirements of the above licenses by purchasing
// a commercial license. Buying such a license is mandatory if you want to
// modify or otherwise use the software for commercial activities involving the
// Arduino software without disclosing the source code of your own applications.
// To purchase a commercial license, send an email to license@arduino.cc.
package paths
import (
"fmt"
"os/exec"
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
func tellCommandNotToSpawnShell(oscmd *exec.Cmd) {
if oscmd.SysProcAttr == nil {
oscmd.SysProcAttr = &syscall.SysProcAttr{}
}
oscmd.SysProcAttr.HideWindow = true
}
func tellCommandToStartOnNewProcessGroup(_ *exec.Cmd) {
// no op
}
func kill(oscmd *exec.Cmd) error {
parentProcessMap, err := createParentProcessSnapshot()
if err != nil {
return err
}
return killPidTree(uint32(oscmd.Process.Pid), parentProcessMap)
}
// createParentProcessSnapshot returns a map that correlate a process
// with its parent process: childPid -> parentPid
func createParentProcessSnapshot() (map[uint32]uint32, error) {
// Inspired by: https://stackoverflow.com/a/36089871/1655275
// Make a snapshot of the current running processes
snapshot, err := windows.CreateToolhelp32Snapshot(windows.TH32CS_SNAPPROCESS, 0)
if err != nil {
return nil, fmt.Errorf("getting running processes snapshot: %w", err)
}
defer windows.CloseHandle(snapshot)
// Iterate the result and extract the parent-child relationship
processParentMap := map[uint32]uint32{}
var processEntry windows.ProcessEntry32
processEntry.Size = uint32(unsafe.Sizeof(processEntry))
hasData := (windows.Process32First(snapshot, &processEntry) == nil)
for hasData {
processParentMap[processEntry.ProcessID] = processEntry.ParentProcessID
hasData = (windows.Process32Next(snapshot, &processEntry) == nil)
}
return processParentMap, nil
}
func killPidTree(pid uint32, parentProcessMap map[uint32]uint32) error {
for childPid, parentPid := range parentProcessMap {
if parentPid == pid {
// Descend process tree
if err := killPidTree(childPid, parentProcessMap); err != nil {
return fmt.Errorf("error killing child process: %w", err)
}
}
}
return killPid(pid)
}
func killPid(pid uint32) error {
process, err := windows.OpenProcess(windows.PROCESS_ALL_ACCESS, false, pid)
if err != nil {
return fmt.Errorf("opening process for kill: %w", err)
}
defer windows.CloseHandle(process)
return windows.TerminateProcess(process, 128)
}
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