chromium/sandbox/linux/services/namespace_sandbox.h

// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef SANDBOX_LINUX_SERVICES_NAMESPACE_SANDBOX_H_
#define SANDBOX_LINUX_SERVICES_NAMESPACE_SANDBOX_H_

#include <sys/types.h>

#include <string>
#include <vector>

#include "base/command_line.h"
#include "base/process/launch.h"
#include "base/process/process.h"
#include "sandbox/sandbox_export.h"

namespace sandbox {

// Helper class for starting a process inside a new user, PID, and network
// namespace. Before using a namespace sandbox, check for namespaces support
// using Credentials::CanCreateProcessInNewUserNS.
//
// A typical use for "A" launching a sandboxed process "B" would be:
// 1. A sets up a command line and launch options for process B.
// 2. A launches B with LaunchProcess.
// 3. B should be prepared to assume the role of init(1). In particular, apart
//    from SIGKILL and SIGSTOP, B cannot receive any signal for which it does
//    not have an explicit signal handler registered.
//    If B dies, all the processes in the namespace will die.
//    B can fork() and the parent can assume the role of init(1), by using
//    CreateInitProcessReaper().
// 4. B chroots using Credentials::MoveToNewUserNS() and
//    Credentials::DropFileSystemAccess()
// 5. B drops capabilities gained by entering the new user namespace with
//    Credentials::DropAllCapabilities().
class SANDBOX_EXPORT NamespaceSandbox { … };

}  // namespace sandbox

#endif  // SANDBOX_LINUX_SERVICES_NAMESPACE_SANDBOX_H_