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.BufferedReader;
   8 import java.io.DataOutputStream;
   9
  10 import android.content.Context;
  11 import android.content.SharedPreferences;
  12
  13 public class DebounceModuleHelper
  14 {
  15         private Context ctx;
  16         public static final String PREFS_NAME = "DebounceCfg";
  17         final int SUPERUSER_REQUEST = 4223;
  18
  19         public DebounceModuleHelper(Context context) {
  20                 ctx = context;
  21         }
  22
  23         public void loadModule() {
  24                 loadModule(getSavedDelay());
  25         }
  26
  27         protected void runAsRoot(String command) throws java.io.IOException,java.lang.InterruptedException {
  28                 Process rootcmd = Runtime.getRuntime().exec(new String[]{"su","-c","sh"});
  29                 DataOutputStream sh = new DataOutputStream(rootcmd.getOutputStream());
  30                 sh.writeBytes(command + "\n");
  31                 sh.writeBytes("exit\n");
  32                 sh.flush();
  33                 sh.close();
  34
  35                 rootcmd.waitFor();
  36         }
  37
  38         public synchronized void loadModule(int delay) {
  39                 File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
  40
  41                 extractModule();
  42
  43                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
  44                 SharedPreferences.Editor editor = settings.edit();
  45                 if (is_safe_to_load()) {
  46                         editor.putBoolean("safe_to_load", false);
  47                         editor.commit();
  48                 }
  49
  50                 try {
  51                         runAsRoot("/system/bin/insmod " + debounce_ko + " debounce_delay=" + delay);
  52                 } catch (Exception e) {
  53                         return;
  54                 }
  55
  56                 if (!isLoaded()) {
  57                         return;
  58                 }
  59
  60                 if (getDelay() <= 0) {
  61                         return;
  62                 }
  63
  64                 /* Module was obviously loaded, so it is safe to load on boot */
  65                 editor.putBoolean("safe_to_load", true);
  66                 editor.commit();
  67         }
  68
  69         public synchronized void unloadModule() {
  70                 try {
  71                         runAsRoot("/system/bin/rmmod debounce");
  72                 } catch (Exception e) {}
  73         }
  74
  75         public synchronized boolean isLoaded() {
  76                 boolean loaded = false;
  77                 try {
  78                         String read;
  79
  80                         FileReader modules = new FileReader("/proc/modules");
  81                         BufferedReader modules_buf = new BufferedReader(modules);
  82
  83                         while((read = modules_buf.readLine()) != null) {
  84                                 if (read.regionMatches(0, "debounce", 0, 8)) {
  85                                         loaded = true;
  86                                 }
  87                         }
  88
  89                 } catch (Exception e) {
  90                         loaded = false;
  91                 }
  92
  93                 return loaded;
  94         }
  95
  96         public synchronized int getDelay() {
  97                 int debounce_delay = -1;
  98
  99                 try {
 100                         String read;
 101
 102                         FileReader delay = new FileReader("/sys/module/debounce/parameters/debounce_delay");
 103                         BufferedReader delay_buf = new BufferedReader(delay);
 104
 105                         read = delay_buf.readLine();
 106                         if (read != null) {
 107                                 debounce_delay = Integer.parseInt(read.trim());
 108                         }
 109                 } catch (Exception e) {}
 110
 111                 return debounce_delay;
 112         }
 113
 114         public synchronized void setDelay(int delay) {
 115                 if (isLoaded()) {
 116                         if (getDelay() == delay) {
 117                                 return;
 118                         }
 119
 120                         unloadModule();
 121                 }
 122
 123                 loadModule(delay);
 124         }
 125
 126         public synchronized int getSavedDelay() {
 127                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 128
 129                 return settings.getInt("debounce_delay", 10);
 130         }
 131
 132         public synchronized void setSavedDelay(int delay) {
 133                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 134                 SharedPreferences.Editor editor = settings.edit();
 135
 136                 editor.putInt("debounce_delay", delay);
 137                 editor.commit();
 138         }
 139
 140         public synchronized boolean is_safe_to_load() {
 141                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 142                 return settings.getBoolean("safe_to_load", false);
 143         }
 144
 145         public synchronized boolean get_on_boot() {
 146                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 147                 return settings.getBoolean("on_boot", false);
 148         }
 149
 150         public synchronized void set_on_boot(boolean on_boot) {
 151                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 152                 SharedPreferences.Editor editor = settings.edit();
 153
 154                 editor.putBoolean("on_boot", on_boot);
 155                 editor.commit();
 156         }
 157
 158         private synchronized void extractModule() {
 159                 File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
 160
 161                 if (debounce_ko.exists()) {
 162                         return;
 163                 }
 164
 165                 try {
 166                         InputStream apk = ctx.getAssets().open("debounce.ko");
 167                         OutputStream mod = ctx.openFileOutput("debounce.ko.tmp", 0);
 168
 169                         //I assume a page is 4k...
 170                         byte buf[] = new byte[4096];
 171                         int bytes;
 172
 173                         while((bytes = apk.read(buf)) != -1) {
 174                                 mod.write(buf, 0, bytes);
 175                         }
 176
 177                         apk.close();
 178                         mod.close();
 179
 180                         File tmpfile = new File(debounce_ko + ".tmp");
 181                         tmpfile.renameTo(debounce_ko);
 182                 } catch (Exception e) {}
 183         }
 184 }