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
   9 import android.content.Context;
  10 import android.content.SharedPreferences;
  11
  12 public class DebounceModuleHelper
  13 {
  14         private Context ctx;
  15         public static final String PREFS_NAME = "DebounceCfg";
  16
  17         public DebounceModuleHelper(Context context) {
  18                 ctx = context;
  19         }
  20
  21         public void loadModule() {
  22                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
  23
  24                 int delay = settings.getInt("debounce_delay", 10);
  25                 loadModule(delay);
  26         }
  27
  28         public synchronized void loadModule(int delay) {
  29                 File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
  30
  31                 extractModule();
  32
  33                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
  34                 SharedPreferences.Editor editor = settings.edit();
  35                 if (is_safe_to_load()) {
  36                         editor.putBoolean("safe_to_load", false);
  37                         editor.commit();
  38                 }
  39
  40                 try {
  41                         Process insmod = Runtime.getRuntime().exec(new String[]{"su","-c","/system/bin/insmod " + debounce_ko + " debounce_delay=" + delay});
  42                         insmod.waitFor();
  43                 } catch (Exception e) {
  44                         return;
  45                 }
  46
  47                 if (getDelay() <= 0) {
  48                         return;
  49                 }
  50
  51                 /* Module was obviously loaded, so it is safe to load on boot */
  52                 editor.putBoolean("safe_to_load", true);
  53                 editor.commit();
  54         }
  55
  56         public synchronized void unloadModule() {
  57                 try {
  58                         Process rmmod = Runtime.getRuntime().exec(new String[]{"su","-c","/system/bin/rmmod debounce"});
  59                         rmmod.waitFor();
  60                 } catch (Exception e) {}
  61         }
  62
  63         public synchronized boolean isLoaded() {
  64                 boolean loaded = false;
  65                 try {
  66                         String read;
  67
  68                         FileReader modules = new FileReader("/proc/modules");
  69                         BufferedReader modules_buf = new BufferedReader(modules);
  70
  71                         while((read = modules_buf.readLine()) != null) {
  72                                 if (read.regionMatches(0, "debounce", 0, 8)) {
  73                                         loaded = true;
  74                                 }
  75                         }
  76
  77                 } catch (Exception e) {
  78                         loaded = false;
  79                 }
  80
  81                 return loaded;
  82         }
  83
  84         public synchronized int getDelay() {
  85                 int debounce_delay = -1;
  86
  87                 try {
  88                         String read;
  89
  90                         FileReader delay = new FileReader("/sys/module/debounce/parameters/debounce_delay");
  91                         BufferedReader delay_buf = new BufferedReader(delay);
  92
  93                         read = delay_buf.readLine();
  94                         if (read != null) {
  95                                 debounce_delay = Integer.parseInt(read.trim());
  96                         }
  97                 } catch (Exception e) {}
  98
  99                 return debounce_delay;
 100         }
 101
 102         public synchronized boolean is_safe_to_load() {
 103                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 104                 boolean safe_to_load = settings.getBoolean("safe_to_load", false);
 105
 106                 return safe_to_load;
 107         }
 108
 109         private synchronized void extractModule() {
 110                 File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
 111
 112                 if (debounce_ko.exists()) {
 113                         return;
 114                 }
 115
 116                 try {
 117                         InputStream apk = ctx.getAssets().open("debounce.ko");
 118                         OutputStream mod = ctx.openFileOutput("debounce.ko.tmp", 0);
 119
 120                         //I assume a page is 4k...
 121                         byte buf[] = new byte[4096];
 122                         int bytes;
 123
 124                         while((bytes = apk.read(buf)) != -1) {
 125                                 mod.write(buf, 0, bytes);
 126                         }
 127
 128                         apk.close();
 129                         mod.close();
 130
 131                         File tmpfile = new File(debounce_ko + ".tmp");
 132                         tmpfile.renameTo(debounce_ko);
 133                 } catch (Exception e) {}
 134         }
 135 }