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      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 
     32 namespace android {
     33 
     34 const String16 sAccessInputFlingerPermission("android.permission.ACCESS_INPUT_FLINGER");
     35 const String16 sDumpPermission("android.permission.DUMP");
     36 
     37 
     38 InputFlinger::InputFlinger() :
     39         BnInputFlinger() {
     40     ALOGI("InputFlinger is starting");
     41     mHost = new InputHost();
     42     mHost->registerInputDriver(new InputDriver(INPUT_INSTANCE_EVDEV));
     43 }
     44 
     45 InputFlinger::~InputFlinger() {
     46 }
     47 
     48 status_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 
     64 void InputFlinger::dumpInternal(String8& result) {
     65     result.append("INPUT FLINGER (dumpsys inputflinger)\n");
     66     mHost->dump(result);
     67 }
     68 
     69 }; // namespace android
     70