/services/java/com/android/server/SerialService.java

 1/*
 2 * Copyright (C) 2011 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 an
14 * limitations under the License.
15 */
16
17package com.android.server;
18
19import android.content.Context;
20import android.hardware.ISerialManager;
21import android.os.ParcelFileDescriptor;
22
23import java.io.File;
24import java.util.ArrayList;
25
26public class SerialService extends ISerialManager.Stub {
27
28    private final Context mContext;
29    private final String[] mSerialPorts;
30
31    public SerialService(Context context) {
32        mContext = context;
33        mSerialPorts = context.getResources().getStringArray(
34                com.android.internal.R.array.config_serialPorts);
35    }
36
37    public String[] getSerialPorts() {
38        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.SERIAL_PORT, null);
39
40        ArrayList<String> ports = new ArrayList<String>();
41        for (int i = 0; i < mSerialPorts.length; i++) {
42            String path = mSerialPorts[i];
43            if (new File(path).exists()) {
44                ports.add(path);
45            }
46        }
47        String[] result = new String[ports.size()];
48        ports.toArray(result);
49        return result;
50    }
51
52    public ParcelFileDescriptor openSerialPort(String path) {
53        mContext.enforceCallingOrSelfPermission(android.Manifest.permission.SERIAL_PORT, null);
54        for (int i = 0; i < mSerialPorts.length; i++) {
55            if (mSerialPorts[i].equals(path)) {
56                return native_open(path);
57            }
58        }
59        throw new IllegalArgumentException("Invalid serial port " + path);
60    }
61
62    private native ParcelFileDescriptor native_open(String path);
63}