The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2006 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 | #include <unistd.h> |
| 18 | #include <android_runtime/ActivityManager.h> |
Mathias Agopian | 0795272 | 2009-05-19 19:08:10 -0700 | [diff] [blame] | 19 | #include <binder/IBinder.h> |
| 20 | #include <binder/IServiceManager.h> |
| 21 | #include <binder/Parcel.h> |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 22 | #include <utils/String8.h> |
| 23 | |
| 24 | namespace android { |
| 25 | |
| 26 | const uint32_t OPEN_CONTENT_URI_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION + 4; |
| 27 | |
| 28 | // Perform ContentProvider.openFile() on the given URI, returning |
| 29 | // the resulting native file descriptor. Returns < 0 on error. |
| 30 | int openContentProviderFile(const String16& uri) |
| 31 | { |
| 32 | int fd = -1; |
| 33 | |
| 34 | sp<IServiceManager> sm = defaultServiceManager(); |
| 35 | sp<IBinder> am = sm->getService(String16("activity")); |
| 36 | if (am != NULL) { |
| 37 | Parcel data, reply; |
| 38 | data.writeInterfaceToken(String16("android.app.IActivityManager")); |
| 39 | data.writeString16(uri); |
| 40 | status_t ret = am->transact(OPEN_CONTENT_URI_TRANSACTION, data, &reply); |
| 41 | if (ret == NO_ERROR) { |
Brad Fitzpatrick | c0a7e69 | 2010-07-13 15:33:35 -0700 | [diff] [blame] | 42 | int32_t exceptionCode = reply.readExceptionCode(); |
The Android Open Source Project | 9066cfe | 2009-03-03 19:31:44 -0800 | [diff] [blame] | 43 | if (!exceptionCode) { |
| 44 | // Success is indicated here by a nonzero int followed by the fd; |
| 45 | // failure by a zero int with no data following. |
| 46 | if (reply.readInt32() != 0) { |
| 47 | fd = dup(reply.readFileDescriptor()); |
| 48 | } |
| 49 | } else { |
| 50 | // An exception was thrown back; fall through to return failure |
| 51 | LOGD("openContentUri(%s) caught exception %d\n", |
| 52 | String8(uri).string(), exceptionCode); |
| 53 | } |
| 54 | } |
| 55 | } |
| 56 | |
| 57 | return fd; |
| 58 | } |
| 59 | |
| 60 | } /* namespace android */ |