115 lines
3.4 KiB
C++
115 lines
3.4 KiB
C++
/*
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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 <errno.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <string.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 "init.h"
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#include "log.h"
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#include "property_service.h"
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#include "service.h"
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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 = property_get("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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