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- // 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<pid_t>(launch_data_get_integer(pid_data));
- }
- } // namespace base::mac
- #pragma clang diagnostic pop
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