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/*
* ConnectBot: simple, powerful, open-source SSH client for Android
* Copyright 2007 Kenny Root, Jeffrey Sharkey
*
* 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.connectbot.transport;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Map;
import org.connectbot.R;
import org.connectbot.bean.HostBean;
import org.connectbot.util.HostDatabase;
import com.google.ase.Exec;
import android.content.Context;
import android.net.Uri;
import android.support.annotation.VisibleForTesting;
import android.util.Log;
/**
* @author Kenny Root
*
*/
public class Local extends AbsTransport {
private static final String TAG = "CB.Local";
private static final String PROTOCOL = "local";
private static final String DEFAULT_URI = "local:#Local";
private final Killer killer;
private FileDescriptor shellFd;
private int shellPid;
private FileInputStream is;
private FileOutputStream os;
public Local() {
killer = new AndroidKiller();
}
@VisibleForTesting
public Local(Killer killer) {
this.killer = killer;
}
public static String getProtocolName() {
return PROTOCOL;
}
@Override
public void close() {
try {
if (os != null) {
os.close();
os = null;
}
if (is != null) {
is.close();
is = null;
}
killer.killProcess(shellPid);
} catch (IOException e) {
Log.e(TAG, "Couldn't close shell", e);
}
}
@Override
public void connect() {
int[] pids = new int[1];
try {
shellFd = Exec.createSubprocess("/system/bin/sh", "-", null, pids);
} catch (Exception e) {
bridge.outputLine(manager.res.getString(R.string.local_shell_unavailable));
Log.e(TAG, "Cannot start local shell", e);
return;
}
shellPid = pids[0];
Runnable exitWatcher = new Runnable() {
public void run() {
Exec.waitFor(shellPid);
bridge.dispatchDisconnect(false);
}
};
Thread exitWatcherThread = new Thread(exitWatcher);
exitWatcherThread.setName("LocalExitWatcher");
exitWatcherThread.setDaemon(true);
exitWatcherThread.start();
is = new FileInputStream(shellFd);
os = new FileOutputStream(shellFd);
bridge.onConnected();
}
@Override
public void flush() throws IOException {
os.flush();
}
@Override
public String getDefaultNickname(String username, String hostname, int port) {
return DEFAULT_URI;
}
@Override
public int getDefaultPort() {
return 0;
}
@Override
public boolean isConnected() {
return is != null && os != null;
}
@Override
public boolean isSessionOpen() {
return is != null && os != null;
}
@Override
public int read(byte[] buffer, int start, int len) throws IOException {
if (is == null) {
bridge.dispatchDisconnect(false);
throw new IOException("session closed");
}
return is.read(buffer, start, len);
}
@Override
public void setDimensions(int columns, int rows, int width, int height) {
// We are not connected yet.
if (shellFd == null) {
return;
}
try {
Exec.setPtyWindowSize(shellFd, rows, columns, width, height);
} catch (Exception e) {
Log.e(TAG, "Couldn't resize pty", e);
}
}
@Override
public void write(byte[] buffer) throws IOException {
if (os != null)
os.write(buffer);
}
@Override
public void write(int c) throws IOException {
if (os != null)
os.write(c);
}
public static Uri getUri(String input) {
Uri uri = Uri.parse(DEFAULT_URI);
if (input != null && input.length() > 0) {
uri = uri.buildUpon().fragment(input).build();
}
return uri;
}
@Override
public HostBean createHost(Uri uri) {
HostBean host = new HostBean();
host.setProtocol(PROTOCOL);
String nickname = uri.getFragment();
if (nickname == null || nickname.length() == 0) {
host.setNickname(getDefaultNickname(host.getUsername(),
host.getHostname(), host.getPort()));
} else {
host.setNickname(uri.getFragment());
}
return host;
}
@Override
public void getSelectionArgs(Uri uri, Map<String, String> selection) {
selection.put(HostDatabase.FIELD_HOST_PROTOCOL, PROTOCOL);
selection.put(HostDatabase.FIELD_HOST_NICKNAME, uri.getFragment());
}
public static String getFormatHint(Context context) {
return context.getString(R.string.hostpref_nickname_title);
}
/* (non-Javadoc)
* @see org.connectbot.transport.AbsTransport#usesNetwork()
*/
@Override
public boolean usesNetwork() {
return false;
}
private interface Killer {
void killProcess(int pid);
}
private static class AndroidKiller implements Killer {
@Override
public void killProcess(int pid) {
android.os.Process.killProcess(pid);
}
}
}
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