// Copyright (c) 2012 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. #include "base/mac/launchd.h" #include "base/logging.h" #include "base/mac/scoped_launch_data.h" #include "base/numerics/safe_conversions.h" // This file is written in terms of launch_data_t, which is deprecated but has // no replacement. Ignore the deprecation warnings for now. #pragma clang diagnostic push #pragma clang diagnostic ignored "-Wdeprecated-declarations" namespace base::mac { // MessageForJob sends a single message to launchd with a simple dictionary // mapping |operation| to |job_label|, and returns the result of calling // launch_msg to send that message. On failure, returns NULL. The caller // assumes ownership of the returned launch_data_t object. launch_data_t MessageForJob(const std::string& job_label, const char* operation) { // launch_data_alloc returns something that needs to be freed. ScopedLaunchData message(launch_data_alloc(LAUNCH_DATA_DICTIONARY)); if (!message.is_valid()) { LOG(ERROR) << "launch_data_alloc"; return NULL; } // launch_data_new_string returns something that needs to be freed, but // the dictionary will assume ownership when launch_data_dict_insert is // called, so put it in a scoper and .release() it when given to the // dictionary. ScopedLaunchData job_label_launchd(launch_data_new_string(job_label.c_str())); if (!job_label_launchd.is_valid()) { LOG(ERROR) << "launch_data_new_string"; return NULL; } if (!launch_data_dict_insert(message.get(), job_label_launchd.release(), operation)) { return NULL; } return launch_msg(message.get()); } pid_t PIDForJob(const std::string& job_label) { ScopedLaunchData response(MessageForJob(job_label, LAUNCH_KEY_GETJOB)); if (!response.is_valid()) { return -1; } launch_data_type_t response_type = launch_data_get_type(response.get()); if (response_type != LAUNCH_DATA_DICTIONARY) { if (response_type == LAUNCH_DATA_ERRNO) { LOG(ERROR) << "PIDForJob: error " << launch_data_get_errno(response.get()); } else { LOG(ERROR) << "PIDForJob: expected dictionary, got " << response_type; } return -1; } launch_data_t pid_data = launch_data_dict_lookup(response.get(), LAUNCH_JOBKEY_PID); if (!pid_data) return 0; if (launch_data_get_type(pid_data) != LAUNCH_DATA_INTEGER) { LOG(ERROR) << "PIDForJob: expected integer"; return -1; } return checked_cast(launch_data_get_integer(pid_data)); } } // namespace base::mac #pragma clang diagnostic pop