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 setAllValues() {
  26                 setDelay(getSavedDelay());
  27                 setSettle(getSavedSettle());
  28                 setPoll(getSavedPoll());
  29         }
  30
  31         public void loadModule() {
  32                 _loadModule();
  33                 setAllValues();
  34         }
  35
  36         protected void runAsRoot(String command) throws java.io.IOException,java.lang.InterruptedException {
  37                 Process rootcmd = Runtime.getRuntime().exec(new String[]{"su","-c","sh"});
  38                 DataOutputStream sh = new DataOutputStream(rootcmd.getOutputStream());
  39                 sh.writeBytes(command + "\n");
  40                 sh.writeBytes("exit\n");
  41                 sh.flush();
  42                 sh.close();
  43
  44                 rootcmd.waitFor();
  45         }
  46
  47         public synchronized void _loadModule() {
  48                 File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
  49
  50                 extractModule();
  51
  52                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
  53                 SharedPreferences.Editor editor = settings.edit();
  54                 if (is_safe_to_load()) {
  55                         editor.putBoolean("safe_to_load", false);
  56                         editor.commit();
  57                 }
  58
  59                 try {
  60                         runAsRoot("/system/bin/insmod " + debounce_ko);
  61                 } catch (Exception e) {
  62                         return;
  63                 }
  64
  65                 if (!isLoaded()) {
  66                         return;
  67                 }
  68
  69                 if (getDelay() < 0) {
  70                         return;
  71                 }
  72
  73                 /* Module was obviously loaded, so it is safe to load on boot */
  74                 editor.putBoolean("safe_to_load", true);
  75                 editor.commit();
  76         }
  77
  78         public synchronized void unloadModule() {
  79                 try {
  80                         runAsRoot("/system/bin/rmmod debounce");
  81                 } catch (Exception e) {}
  82         }
  83
  84         public synchronized boolean isLoaded() {
  85                 boolean loaded = false;
  86                 try {
  87                         String read;
  88
  89                         FileReader modules = new FileReader("/proc/modules");
  90                         BufferedReader modules_buf = new BufferedReader(modules);
  91
  92                         while((read = modules_buf.readLine()) != null) {
  93                                 if (read.regionMatches(0, "debounce", 0, 8)) {
  94                                         loaded = true;
  95                                 }
  96                         }
  97
  98                 } catch (Exception e) {
  99                         loaded = false;
 100                 }
 101
 102                 return loaded;
 103         }
 104
 105         private synchronized int getValue(String parameter) {
 106                 int value = -1;
 107
 108                 try {
 109                         String read;
 110
 111                         FileReader fr = new FileReader("/sys/devices/debounce/" + parameter);
 112                         BufferedReader fbuf = new BufferedReader(fr);
 113
 114                         read = fbuf.readLine();
 115                         if (read != null) {
 116                                 value = Integer.parseInt(read.trim());
 117                         }
 118
 119                         fbuf.close();
 120                 } catch (Exception e) {}
 121
 122                 return value;
 123         }
 124
 125         private synchronized void setValue(String parameter, int value) {
 126                 if (!isLoaded()) {
 127                         return;
 128                 }
 129
 130                 try {
 131                         FileWriter fw = new FileWriter("/sys/devices/debounce/" + parameter);
 132                         BufferedWriter fbuf = new BufferedWriter(fw);
 133
 134                         fbuf.write((new Integer(value)).toString());
 135
 136                         fbuf.close();
 137                 } catch (Exception e) {}
 138         }
 139
 140         public synchronized int getDelay() {
 141                 return getValue("debounce_delay");
 142         }
 143
 144         public synchronized void setDelay(int debounce_delay) {
 145                 setValue("debounce_delay", debounce_delay);
 146         }
 147
 148         public synchronized int getSettle() {
 149                 return getValue("settle_time");
 150         }
 151
 152         public synchronized void setSettle(int settle_time) {
 153                 setValue("settle_time", settle_time);
 154         }
 155
 156         public synchronized int getPoll() {
 157                 return getValue("poll_time");
 158         }
 159
 160         public synchronized void setPoll(int poll_time) {
 161                 setValue("poll_time", poll_time);
 162         }
 163
 164         public synchronized int getSavedDelay() {
 165                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 166
 167                 return settings.getInt("debounce_delay", 15);
 168         }
 169
 170         public synchronized void setSavedDelay(int delay) {
 171                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 172                 SharedPreferences.Editor editor = settings.edit();
 173
 174                 editor.putInt("debounce_delay", delay);
 175                 editor.commit();
 176         }
 177
 178         public synchronized int getSavedSettle() {
 179                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 180
 181                 return settings.getInt("settle_time", 150);
 182         }
 183
 184         public synchronized void setSavedSettle(int settle) {
 185                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 186                 SharedPreferences.Editor editor = settings.edit();
 187
 188                 editor.putInt("settle_time", settle);
 189                 editor.commit();
 190         }
 191
 192         public synchronized int getSavedPoll() {
 193                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 194
 195                 return settings.getInt("poll_time", 2);
 196         }
 197
 198         public synchronized void setSavedPoll(int poll) {
 199                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 200                 SharedPreferences.Editor editor = settings.edit();
 201
 202                 editor.putInt("poll_time", poll);
 203                 editor.commit();
 204         }
 205
 206         public synchronized boolean is_safe_to_load() {
 207                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 208                 return settings.getBoolean("safe_to_load", false);
 209         }
 210
 211         public synchronized boolean get_on_boot() {
 212                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 213                 return settings.getBoolean("on_boot", false);
 214         }
 215
 216         public synchronized void set_on_boot(boolean on_boot) {
 217                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 218                 SharedPreferences.Editor editor = settings.edit();
 219
 220                 editor.putBoolean("on_boot", on_boot);
 221                 editor.commit();
 222         }
 223
 224         private synchronized void extractModule() {
 225                 File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
 226
 227                 if (debounce_ko.exists()) {
 228                         return;
 229                 }
 230
 231                 try {
 232                         InputStream apk = ctx.getAssets().open("debounce.ko");
 233                         OutputStream mod = ctx.openFileOutput("debounce.ko.tmp", 0);
 234
 235                         //I assume a page is 4k...
 236                         byte buf[] = new byte[4096];
 237                         int bytes;
 238
 239                         while((bytes = apk.read(buf)) != -1) {
 240                                 mod.write(buf, 0, bytes);
 241                         }
 242
 243                         apk.close();
 244                         mod.close();
 245
 246                         File tmpfile = new File(debounce_ko + ".tmp");
 247                         tmpfile.renameTo(debounce_ko);
 248                 } catch (Exception e) {}
 249         }
 250 }