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/*
* Copyright (C) 2006 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <unistd.h>
#include <android_runtime/ActivityManager.h>
#include <utils/IBinder.h>
#include <utils/IServiceManager.h>
#include <utils/Parcel.h>
#include <utils/String8.h>
namespace android {
const uint32_t OPEN_CONTENT_URI_TRANSACTION = IBinder::FIRST_CALL_TRANSACTION + 4;
// Perform ContentProvider.openFile() on the given URI, returning
// the resulting native file descriptor. Returns < 0 on error.
int openContentProviderFile(const String16& uri)
{
int fd = -1;
sp<IServiceManager> sm = defaultServiceManager();
sp<IBinder> am = sm->getService(String16("activity"));
if (am != NULL) {
Parcel data, reply;
data.writeInterfaceToken(String16("android.app.IActivityManager"));
data.writeString16(uri);
status_t ret = am->transact(OPEN_CONTENT_URI_TRANSACTION, data, &reply);
if (ret == NO_ERROR) {
int32_t exceptionCode = reply.readInt32();
if (!exceptionCode) {
// Success is indicated here by a nonzero int followed by the fd;
// failure by a zero int with no data following.
if (reply.readInt32() != 0) {
fd = dup(reply.readFileDescriptor());
}
} else {
// An exception was thrown back; fall through to return failure
LOGD("openContentUri(%s) caught exception %d\n",
String8(uri).string(), exceptionCode);
}
}
}
return fd;
}
} /* namespace android */
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