git.zerfleddert.de Git - ms2-fixes/blob - MS2Debounce/src/de/rmdir/ms2debounce/DebounceModuleHelper.java

   1 package de.rmdir.ms2debounce;
   2
   3 import java.io.InputStream;
   4 import java.io.OutputStream;
   5 import java.io.File;
   6 import java.io.FileReader;
   7 import java.io.FileWriter;
   8 import java.io.BufferedReader;
   9 import java.io.BufferedWriter;
  10 import java.io.DataOutputStream;
  11
  12 import android.content.Context;
  13 import android.content.SharedPreferences;
  14
  15 public class DebounceModuleHelper
  16 {
  17         private Context ctx;
  18         public static final String PREFS_NAME = "DebounceCfg";
  19         final int SUPERUSER_REQUEST = 4223;
  20
  21         public DebounceModuleHelper(Context context) {
  22                 ctx = context;
  23         }
  24
  25         public void loadModule() {
  26                 _loadModule();
  27                 setDelay(getSavedDelay());
  28                 setSettle(getSavedSettle());
  29                 setPoll(getSavedPoll());
  30         }
  31
  32         protected void runAsRoot(String command) throws java.io.IOException,java.lang.InterruptedException {
  33                 Process rootcmd = Runtime.getRuntime().exec(new String[]{"su","-c","sh"});
  34                 DataOutputStream sh = new DataOutputStream(rootcmd.getOutputStream());
  35                 sh.writeBytes(command + "\n");
  36                 sh.writeBytes("exit\n");
  37                 sh.flush();
  38                 sh.close();
  39
  40                 rootcmd.waitFor();
  41         }
  42
  43         public synchronized void _loadModule() {
  44                 File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
  45
  46                 extractModule();
  47
  48                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
  49                 SharedPreferences.Editor editor = settings.edit();
  50                 if (is_safe_to_load()) {
  51                         editor.putBoolean("safe_to_load", false);
  52                         editor.commit();
  53                 }
  54
  55                 try {
  56                         runAsRoot("/system/bin/insmod " + debounce_ko);
  57                 } catch (Exception e) {
  58                         return;
  59                 }
  60
  61                 if (!isLoaded()) {
  62                         return;
  63                 }
  64
  65                 if (getDelay() < 0) {
  66                         return;
  67                 }
  68
  69                 /* Module was obviously loaded, so it is safe to load on boot */
  70                 editor.putBoolean("safe_to_load", true);
  71                 editor.commit();
  72         }
  73
  74         public synchronized void unloadModule() {
  75                 try {
  76                         runAsRoot("/system/bin/rmmod debounce");
  77                 } catch (Exception e) {}
  78         }
  79
  80         public synchronized boolean isLoaded() {
  81                 boolean loaded = false;
  82                 try {
  83                         String read;
  84
  85                         FileReader modules = new FileReader("/proc/modules");
  86                         BufferedReader modules_buf = new BufferedReader(modules);
  87
  88                         while((read = modules_buf.readLine()) != null) {
  89                                 if (read.regionMatches(0, "debounce", 0, 8)) {
  90                                         loaded = true;
  91                                 }
  92                         }
  93
  94                 } catch (Exception e) {
  95                         loaded = false;
  96                 }
  97
  98                 return loaded;
  99         }
 100
 101         private synchronized int getValue(String parameter) {
 102                 int value = -1;
 103
 104                 try {
 105                         String read;
 106
 107                         FileReader fr = new FileReader("/sys/devices/debounce/" + parameter);
 108                         BufferedReader fbuf = new BufferedReader(fr);
 109
 110                         read = fbuf.readLine();
 111                         if (read != null) {
 112                                 value = Integer.parseInt(read.trim());
 113                         }
 114
 115                         fbuf.close();
 116                 } catch (Exception e) {}
 117
 118                 return value;
 119         }
 120
 121         private synchronized void setValue(String parameter, int value) {
 122                 if (!isLoaded()) {
 123                         return;
 124                 }
 125
 126                 try {
 127                         FileWriter fw = new FileWriter("/sys/devices/debounce/" + parameter);
 128                         BufferedWriter fbuf = new BufferedWriter(fw);
 129
 130                         fbuf.write((new Integer(value)).toString());
 131
 132                         fbuf.close();
 133                 } catch (Exception e) {}
 134         }
 135
 136         public synchronized int getDelay() {
 137                 return getValue("debounce_delay");
 138         }
 139
 140         public synchronized void setDelay(int debounce_delay) {
 141                 setValue("debounce_delay", debounce_delay);
 142         }
 143
 144         public synchronized int getSettle() {
 145                 return getValue("settle_time");
 146         }
 147
 148         public synchronized void setSettle(int settle_time) {
 149                 setValue("settle_time", settle_time);
 150         }
 151
 152         public synchronized int getPoll() {
 153                 return getValue("poll_time");
 154         }
 155
 156         public synchronized void setPoll(int poll_time) {
 157                 setValue("poll_time", poll_time);
 158         }
 159
 160         public synchronized int getSavedDelay() {
 161                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 162
 163                 return settings.getInt("debounce_delay", 8);
 164         }
 165
 166         public synchronized void setSavedDelay(int delay) {
 167                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 168                 SharedPreferences.Editor editor = settings.edit();
 169
 170                 editor.putInt("debounce_delay", delay);
 171                 editor.commit();
 172         }
 173
 174         public synchronized int getSavedSettle() {
 175                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 176
 177                 return settings.getInt("settle_time", 100);
 178         }
 179
 180         public synchronized void setSavedSettle(int settle) {
 181                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 182                 SharedPreferences.Editor editor = settings.edit();
 183
 184                 editor.putInt("settle_time", settle);
 185                 editor.commit();
 186         }
 187
 188         public synchronized int getSavedPoll() {
 189                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 190
 191                 return settings.getInt("poll_time", 10);
 192         }
 193
 194         public synchronized void setSavedPoll(int poll) {
 195                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 196                 SharedPreferences.Editor editor = settings.edit();
 197
 198                 editor.putInt("poll_time", poll);
 199                 editor.commit();
 200         }
 201
 202         public synchronized boolean is_safe_to_load() {
 203                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 204                 return settings.getBoolean("safe_to_load", false);
 205         }
 206
 207         public synchronized boolean get_on_boot() {
 208                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 209                 return settings.getBoolean("on_boot", false);
 210         }
 211
 212         public synchronized void set_on_boot(boolean on_boot) {
 213                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 214                 SharedPreferences.Editor editor = settings.edit();
 215
 216                 editor.putBoolean("on_boot", on_boot);
 217                 editor.commit();
 218         }
 219
 220         private synchronized void extractModule() {
 221                 File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
 222
 223                 if (debounce_ko.exists()) {
 224                         return;
 225                 }
 226
 227                 try {
 228                         InputStream apk = ctx.getAssets().open("debounce.ko");
 229                         OutputStream mod = ctx.openFileOutput("debounce.ko.tmp", 0);
 230
 231                         //I assume a page is 4k...
 232                         byte buf[] = new byte[4096];
 233                         int bytes;
 234
 235                         while((bytes = apk.read(buf)) != -1) {
 236                                 mod.write(buf, 0, bytes);
 237                         }
 238
 239                         apk.close();
 240                         mod.close();
 241
 242                         File tmpfile = new File(debounce_ko + ".tmp");
 243                         tmpfile.renameTo(debounce_ko);
 244                 } catch (Exception e) {}
 245         }
 246 }