InputFlinger.cpp revision 7823e124e00576e20e47ec717cbe8bc89f0f2bf2 
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#include <stdint.h>
20#include <sys/types.h>
21#include <unistd.h>
22
23#include <binder/IPCThreadState.h>
24#include <binder/PermissionCache.h>
25#include <hardware/input.h>
26#include <log/log.h>
27#include <private/android_filesystem_config.h>
28
29#include "InputFlinger.h"
30#include "InputDriver.h"
31
32namespace android {
33
34const String16 sAccessInputFlingerPermission("android.permission.ACCESS_INPUT_FLINGER");
35const String16 sDumpPermission("android.permission.DUMP");
36
37
38InputFlinger::InputFlinger() :
39        BnInputFlinger() {
40    ALOGI("InputFlinger is starting");
41    mHost = new InputHost();
42    mHost->registerInputDriver(new InputDriver(INPUT_INSTANCE_EVDEV));
43}
44
45InputFlinger::~InputFlinger() {
46}
47
48status_t InputFlinger::dump(int fd, const Vector<String16>& args) {
49    String8 result;
50    const IPCThreadState* ipc = IPCThreadState::self();
51    const int pid = ipc->getCallingPid();
52    const int uid = ipc->getCallingUid();
53    if ((uid != AID_SHELL)
54            && !PermissionCache::checkPermission(sDumpPermission, pid, uid)) {
55        result.appendFormat("Permission Denial: "
56                "can't dump SurfaceFlinger from pid=%d, uid=%d\n", pid, uid);
57    } else {
58        dumpInternal(result);
59    }
60    write(fd, result.string(), result.size());
61    return OK;
62}
63
64void InputFlinger::dumpInternal(String8& result) {
65    result.append("INPUT FLINGER (dumpsys inputflinger)\n");
66    mHost->dump(result);
67}
68
69}; // namespace android
70