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 
17 package com.android.server;
18 
19 import android.content.Context;
20 import android.hardware.ISerialManager;
21 import android.os.ParcelFileDescriptor;
22 
23 import java.io.File;
24 import java.util.ArrayList;
25 
26 public class SerialService extends ISerialManager.Stub {
27 
28     private final Context mContext;
29     private final String[] mSerialPorts;
30 
SerialService(Context context)31     public SerialService(Context context) {
32         mContext = context;
33         mSerialPorts = context.getResources().getStringArray(
34                 com.android.internal.R.array.config_serialPorts);
35     }
36 
getSerialPorts()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 
openSerialPort(String path)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 
native_open(String path)62     private native ParcelFileDescriptor native_open(String path);
63 }
64