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/*
* Copyright (C) 2016 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
*/
package org.drrickorang.loopback;
import android.content.Context;
import android.util.Log;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**
* Places loopback_listener shell script on device storage
*/
public class AtraceScriptsWriter {
private static final String TAG = "AtraceScriptsWriter";
private static final String LISTENER_SCRIPT_LOCATION =
CaptureHolder.DIRECTORY + "/loopback_listener";
/** Writes scripts to device storage, return true on successful write **/
public static boolean writeScriptsToFile(Context ctx) {
try {
File file = new File(CaptureHolder.DIRECTORY);
// Create a directory for script and signal file
if (!file.exists()) {
if (file.mkdir()) {
Log.d(TAG, "writeScriptsToFile: Loopback folder created");
} else {
System.out.println("Failed to create folder!");
return false;
}
}
// Check for writable directory that already existed or after creating
if (!file.isDirectory() || !file.canWrite()) {
Log.d(TAG, "writeScriptsToFile: " + CaptureHolder.DIRECTORY
+ (!file.isDirectory() ? "is not a directory " : "")
+ (!file.canWrite() ? "is not writable" : ""));
return false;
}
copyResToFile(ctx, R.raw.loopback_listener, LISTENER_SCRIPT_LOCATION);
} catch (IOException e) {
Log.e(TAG, "Unable to write script to file", e);
return false;
}
return true;
}
private static void copyResToFile(Context ctx, int resId, String targetFile)
throws IOException {
InputStream inputStream = ctx.getResources().openRawResource(resId);
OutputStream outputStream = new FileOutputStream(targetFile);
copy(inputStream, outputStream);
outputStream.close();
inputStream.close();
}
private static int copy(InputStream input, OutputStream output) throws IOException {
final int BYTES_TO_READ = 2048;
byte[] buffer = new byte[BYTES_TO_READ];
int total = 0;
int n;
while ((n = input.read(buffer)) != -1) {
output.write(buffer, 0, n);
total = total + n;
}
return total;
}
}
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