| // Copyright (c) 2013 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "shill/external_task.h" |
| |
| #include "shill/error.h" |
| #include "shill/process_killer.h" |
| |
| namespace shill { |
| |
| using base::FilePath; |
| using std::map; |
| using std::string; |
| using std::vector; |
| |
| ExternalTask::ExternalTask( |
| ControlInterface *control, |
| GLib *glib, |
| const base::WeakPtr<RPCTaskDelegate> &task_delegate, |
| const base::Callback<void(pid_t, int)> &death_callback) |
| : control_(control), |
| glib_(glib), |
| process_killer_(ProcessKiller::GetInstance()), |
| task_delegate_(task_delegate), |
| death_callback_(death_callback), |
| pid_(0), |
| child_watch_tag_(0) { |
| CHECK(task_delegate_); |
| } |
| |
| ExternalTask::~ExternalTask() { |
| ExternalTask::Stop(); |
| } |
| |
| bool ExternalTask::Start(const FilePath &program, |
| const vector<string> &arguments, |
| const map<string, string> &environment, |
| Error *error) { |
| CHECK(!pid_); |
| CHECK(!child_watch_tag_); |
| CHECK(!rpc_task_); |
| |
| scoped_ptr<RPCTask> local_rpc_task(new RPCTask(control_, this)); |
| |
| // const_cast is safe here, because exec*() (and SpawnAsync) do not |
| // modify the strings passed to them. This isn't captured in the |
| // exec*() prototypes, due to limitations in ISO C. |
| // http://pubs.opengroup.org/onlinepubs/009695399/functions/exec.html |
| vector<char *> process_args; |
| process_args.push_back(const_cast<char *>(program.value().c_str())); |
| for (const auto &option : arguments) { |
| process_args.push_back(const_cast<char *>(option.c_str())); |
| } |
| process_args.push_back(NULL); |
| |
| vector<char *> process_env; |
| vector<string> env_vars(local_rpc_task->GetEnvironment()); |
| for (const auto &env_pair : environment) { |
| env_vars.push_back(string(env_pair.first + "=" + env_pair.second)); |
| } |
| for (const auto &env_var : env_vars) { |
| // See above regarding const_cast. |
| process_env.push_back(const_cast<char *>(env_var.c_str())); |
| } |
| process_env.push_back(NULL); |
| |
| if (!glib_->SpawnAsync(NULL, |
| process_args.data(), |
| process_env.data(), |
| G_SPAWN_DO_NOT_REAP_CHILD, |
| NULL, |
| NULL, |
| &pid_, |
| NULL)) { |
| Error::PopulateAndLog(error, Error::kInternalError, |
| string("Unable to spawn: ") + process_args[0]); |
| return false; |
| } |
| child_watch_tag_ = glib_->ChildWatchAdd(pid_, OnTaskDied, this); |
| rpc_task_.reset(local_rpc_task.release()); |
| return true; |
| } |
| |
| void ExternalTask::Stop() { |
| if (child_watch_tag_) { |
| glib_->SourceRemove(child_watch_tag_); |
| child_watch_tag_ = 0; |
| } |
| if (pid_) { |
| process_killer_->Kill(pid_, base::Closure()); |
| pid_ = 0; |
| } |
| rpc_task_.reset(); |
| } |
| |
| void ExternalTask::GetLogin(string *user, string *password) { |
| return task_delegate_->GetLogin(user, password); |
| } |
| |
| void ExternalTask::Notify(const string &event, |
| const map<string, string> &details) { |
| return task_delegate_->Notify(event, details); |
| } |
| |
| // static |
| void ExternalTask::OnTaskDied(GPid pid, gint status, gpointer data) { |
| LOG(INFO) << __func__ << "(" << pid << ", " << status << ")"; |
| ExternalTask *me = reinterpret_cast<ExternalTask *>(data); |
| me->child_watch_tag_ = 0; |
| CHECK_EQ(pid, me->pid_); |
| me->pid_ = 0; |
| me->death_callback_.Run(pid, status); |
| } |
| |
| } // namespace shill |