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121 lines
3.5 KiB
121 lines
3.5 KiB
/* |
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* Copyright (C) 2010 The Android Open Source Project |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0 |
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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#include "keychords.h" |
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#include <fcntl.h> |
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#include <stdlib.h> |
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#include <sys/stat.h> |
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#include <sys/types.h> |
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#include <linux/keychord.h> |
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#include <unistd.h> |
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#include <android-base/logging.h> |
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#include <android-base/properties.h> |
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#include "init.h" |
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namespace android { |
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namespace init { |
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static struct input_keychord *keychords = 0; |
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static int keychords_count = 0; |
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static int keychords_length = 0; |
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static int keychord_fd = -1; |
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void add_service_keycodes(Service* svc) |
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{ |
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struct input_keychord *keychord; |
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size_t i, size; |
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if (!svc->keycodes().empty()) { |
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/* add a new keychord to the list */ |
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size = sizeof(*keychord) + svc->keycodes().size() * sizeof(keychord->keycodes[0]); |
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keychords = (input_keychord*) realloc(keychords, keychords_length + size); |
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if (!keychords) { |
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PLOG(ERROR) << "could not allocate keychords"; |
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keychords_length = 0; |
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keychords_count = 0; |
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return; |
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} |
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keychord = (struct input_keychord *)((char *)keychords + keychords_length); |
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keychord->version = KEYCHORD_VERSION; |
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keychord->id = keychords_count + 1; |
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keychord->count = svc->keycodes().size(); |
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svc->set_keychord_id(keychord->id); |
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for (i = 0; i < svc->keycodes().size(); i++) { |
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keychord->keycodes[i] = svc->keycodes()[i]; |
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} |
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keychords_count++; |
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keychords_length += size; |
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} |
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} |
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static void handle_keychord() { |
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int ret; |
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__u16 id; |
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ret = read(keychord_fd, &id, sizeof(id)); |
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if (ret != sizeof(id)) { |
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PLOG(ERROR) << "could not read keychord id"; |
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return; |
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} |
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// Only handle keychords if adb is enabled. |
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std::string adb_enabled = android::base::GetProperty("init.svc.adbd", ""); |
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if (adb_enabled == "running") { |
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Service* svc = ServiceManager::GetInstance().FindServiceByKeychord(id); |
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if (svc) { |
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LOG(INFO) << "Starting service " << svc->name() << " from keychord " << id; |
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svc->Start(); |
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} else { |
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LOG(ERROR) << "Service for keychord " << id << " not found"; |
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} |
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} else { |
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LOG(WARNING) << "Not starting service for keychord " << id << " because ADB is disabled"; |
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} |
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} |
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void keychord_init() { |
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ServiceManager::GetInstance().ForEachService(add_service_keycodes); |
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// Nothing to do if no services require keychords. |
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if (!keychords) { |
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return; |
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} |
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keychord_fd = TEMP_FAILURE_RETRY(open("/dev/keychord", O_RDWR | O_CLOEXEC)); |
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if (keychord_fd == -1) { |
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PLOG(ERROR) << "could not open /dev/keychord"; |
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return; |
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} |
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int ret = write(keychord_fd, keychords, keychords_length); |
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if (ret != keychords_length) { |
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PLOG(ERROR) << "could not configure /dev/keychord " << ret; |
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close(keychord_fd); |
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} |
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free(keychords); |
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keychords = nullptr; |
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register_epoll_handler(keychord_fd, handle_keychord); |
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} |
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} // namespace init |
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} // namespace android
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