124 lines
3.2 KiB
C
124 lines
3.2 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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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(struct service *svc)
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{
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struct input_keychord *keychord;
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int i, size;
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if (svc->keycodes) {
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/* add a new keychord to the list */
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size = sizeof(*keychord) + svc->nkeycodes * sizeof(keychord->keycodes[0]);
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keychords = realloc(keychords, keychords_length + size);
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if (!keychords) {
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ERROR("could not allocate keychords\n");
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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->nkeycodes;
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svc->keychord_id = keychord->id;
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for (i = 0; i < svc->nkeycodes; 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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void keychord_init()
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{
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int fd, ret;
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service_for_each(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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fd = open("/dev/keychord", O_RDWR);
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if (fd < 0) {
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ERROR("could not open /dev/keychord\n");
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return;
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}
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fcntl(fd, F_SETFD, FD_CLOEXEC);
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ret = write(fd, keychords, keychords_length);
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if (ret != keychords_length) {
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ERROR("could not configure /dev/keychord %d (%d)\n", ret, errno);
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close(fd);
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fd = -1;
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}
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free(keychords);
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keychords = 0;
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keychord_fd = fd;
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}
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void handle_keychord()
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{
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struct service *svc;
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char adb_enabled[PROP_VALUE_MAX];
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int ret;
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__u16 id;
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// Only handle keychords if adb is enabled.
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property_get("init.svc.adbd", adb_enabled);
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ret = read(keychord_fd, &id, sizeof(id));
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if (ret != sizeof(id)) {
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ERROR("could not read keychord id\n");
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return;
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}
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if (!strcmp(adb_enabled, "running")) {
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svc = service_find_by_keychord(id);
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if (svc) {
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INFO("starting service %s from keychord\n", svc->name);
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service_start(svc, NULL);
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} else {
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ERROR("service for keychord %d not found\n", id);
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}
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}
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}
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int get_keychord_fd()
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{
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return keychord_fd;
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}
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