codifier/exec_linux.go

// Copyright 2020 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// +build linux

package codifier

import (
	"os"
	"os/exec"
	"syscall"
)

// Ensure all child processes are terminated when the parent exits.
func terminateChildProcessesAutomatically(cmd *exec.Cmd) {
	cmd.Env = os.Environ()
	cmd.SysProcAttr = &syscall.SysProcAttr{
		Pdeathsig: syscall.SIGTERM,
	}
	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
}

// Terminate the parent and all child processes.
func terminateProcessesGroup(cmd *exec.Cmd) error {
	pgid, err := syscall.Getpgid(cmd.Process.Pid)
	if err != nil {
		return err
	}
	return syscall.Kill(-pgid, syscall.SIGKILL) // The minus sign indicates process group.
}