InputFlinger.cpp revision 6f783602c05c519238200fed55b0afa097737ca1 
1/*
2 * Copyright (C) 2013 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "InputFlinger"
18
19
20#include <stdint.h>
21#include <unistd.h>
22
23#include <sys/types.h>
24
25#include "InputFlinger.h"
26#include "InputDriver.h"
27
28#include <binder/IPCThreadState.h>
29#include <binder/PermissionCache.h>
30#include <hardware/input.h>
31#include <cutils/log.h>
32#include <private/android_filesystem_config.h>
33
34namespace android {
35
36const String16 sAccessInputFlingerPermission("android.permission.ACCESS_INPUT_FLINGER");
37const String16 sDumpPermission("android.permission.DUMP");
38
39
40InputFlinger::InputFlinger() :
41        BnInputFlinger() {
42    ALOGI("InputFlinger is starting");
43    mHost = new InputHost();
44    mHost->registerInputDriver(new InputDriver(INPUT_INSTANCE_EVDEV));
45}
46
47InputFlinger::~InputFlinger() {
48}
49
50status_t InputFlinger::dump(int fd, const Vector<String16>& args) {
51    String8 result;
52    const IPCThreadState* ipc = IPCThreadState::self();
53    const int pid = ipc->getCallingPid();
54    const int uid = ipc->getCallingUid();
55    if ((uid != AID_SHELL)
56            && !PermissionCache::checkPermission(sDumpPermission, pid, uid)) {
57        result.appendFormat("Permission Denial: "
58                "can't dump SurfaceFlinger from pid=%d, uid=%d\n", pid, uid);
59    } else {
60        dumpInternal(result);
61    }
62    write(fd, result.string(), result.size());
63    return OK;
64}
65
66void InputFlinger::dumpInternal(String8& result) {
67    result.append("INPUT FLINGER (dumpsys inputflinger)\n");
68    mHost->dump(result);
69}
70
71}; // namespace android
72