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Diffstat (limited to 'sandbox/linux/services/namespace_sandbox.h')
| -rw-r--r-- | sandbox/linux/services/namespace_sandbox.h | 101 |
1 files changed, 0 insertions, 101 deletions
diff --git a/sandbox/linux/services/namespace_sandbox.h b/sandbox/linux/services/namespace_sandbox.h deleted file mode 100644 index 80097fb16a..0000000000 --- a/sandbox/linux/services/namespace_sandbox.h +++ /dev/null @@ -1,101 +0,0 @@ -// 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 <sys/types.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: -#if !defined(OS_NACL_NONSFI) - static const int kDefaultExitCode = 1; - - // 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); - - // Forks a process in its own PID namespace. The child process is the init - // process inside of the PID namespace, so if the child needs to fork further, - // it should call CreateInitProcessReaper, which turns the init process into a - // reaper process. - // - // Otherwise, the child should setup handlers for signals which should - // terminate the process using InstallDefaultTerminationSignalHandlers or - // InstallTerminationSignalHandler. This works around the fact that init - // processes ignore such signals unless they have an explicit handler set. - // - // This function requries CAP_SYS_ADMIN. If |drop_capabilities_in_child| is - // true, then capabilities are dropped in the child. - static pid_t ForkInNewPidNamespace(bool drop_capabilities_in_child); - - // Installs a signal handler for: - // - // SIGHUP, SIGINT, SIGABRT, SIGQUIT, SIGPIPE, SIGTERM, SIGUSR1, SIGUSR2 - // - // that exits with kDefaultExitCode. These are signals whose default action is - // to terminate the program (apart from SIGILL, SIGFPE, and SIGSEGV, which - // will still terminate the process if e.g. an illegal instruction is - // encountered, etc.). - // - // If any of these already had a signal handler installed, this function will - // not override them. - static void InstallDefaultTerminationSignalHandlers(); - - // Installs a signal handler for |sig| which exits with |exit_code|. If a - // signal handler was already present for |sig|, does nothing and returns - // false. - static bool InstallTerminationSignalHandler(int sig, int exit_code); -#endif // !defined(OS_NACL_NONSFI) - - // 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_ |