1/* 2 * Copyright (C) 2016 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 "ShellCallback" 18 19#include <unistd.h> 20#include <fcntl.h> 21 22#include <binder/IShellCallback.h> 23 24#include <utils/Log.h> 25#include <binder/Parcel.h> 26#include <utils/String8.h> 27 28#include <private/binder/Static.h> 29 30namespace android { 31 32// ---------------------------------------------------------------------- 33 34class BpShellCallback : public BpInterface<IShellCallback> 35{ 36public: 37 explicit BpShellCallback(const sp<IBinder>& impl) 38 : BpInterface<IShellCallback>(impl) 39 { 40 } 41 42 virtual int openOutputFile(const String16& path, const String16& seLinuxContext) { 43 Parcel data, reply; 44 data.writeInterfaceToken(IShellCallback::getInterfaceDescriptor()); 45 data.writeString16(path); 46 data.writeString16(seLinuxContext); 47 remote()->transact(OP_OPEN_OUTPUT_FILE, data, &reply, 0); 48 reply.readExceptionCode(); 49 int fd = reply.readParcelFileDescriptor(); 50 return fd >= 0 ? fcntl(fd, F_DUPFD_CLOEXEC, 0) : fd; 51 52 } 53}; 54 55IMPLEMENT_META_INTERFACE(ShellCallback, "com.android.internal.os.IShellCallback"); 56 57// ---------------------------------------------------------------------- 58 59status_t BnShellCallback::onTransact( 60 uint32_t code, const Parcel& data, Parcel* reply, uint32_t flags) 61{ 62 switch(code) { 63 case OP_OPEN_OUTPUT_FILE: { 64 CHECK_INTERFACE(IShellCallback, data, reply); 65 String16 path(data.readString16()); 66 String16 seLinuxContext(data.readString16()); 67 int fd = openOutputFile(path, seLinuxContext); 68 if (reply != NULL) { 69 reply->writeNoException(); 70 if (fd >= 0) { 71 reply->writeInt32(1); 72 reply->writeParcelFileDescriptor(fd, true); 73 } else { 74 reply->writeInt32(0); 75 } 76 } else if (fd >= 0) { 77 close(fd); 78 } 79 return NO_ERROR; 80 } break; 81 default: 82 return BBinder::onTransact(code, data, reply, flags); 83 } 84} 85 86}; // namespace android 87