| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // 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 <string> |
| #include <vector> |
| |
| #include "base/command_line.h" |
| #include "base/macros.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 { |
| public: |
| // Launch a new process inside its own user/PID/network namespaces (depending |
| // on kernel support). Requires at a minimum that user namespaces are |
| // supported (use Credentials::CanCreateProcessInNewUserNS to check this). |
| // |
| // pre_exec_delegate and clone_flags fields of LaunchOptions should be nullptr |
| // and 0, respectively, since this function makes a copy of options and |
| // overrides them. |
| static base::Process LaunchProcess(const base::CommandLine& cmdline, |
| const base::LaunchOptions& options); |
| static base::Process LaunchProcess(const std::vector<std::string>& argv, |
| const base::LaunchOptions& options); |
| |
| // Returns whether the namespace sandbox created a new user, PID, and network |
| // namespace. In particular, InNewUserNamespace should return true iff the |
| // process was started via this class. |
| static bool InNewUserNamespace(); |
| static bool InNewPidNamespace(); |
| static bool InNewNetNamespace(); |
| |
| private: |
| DISALLOW_IMPLICIT_CONSTRUCTORS(NamespaceSandbox); |
| }; |
| |
| } // namespace sandbox |
| |
| #endif // SANDBOX_LINUX_SERVICES_NAMESPACE_SANDBOX_H_ |