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 (!isLoaded()) {
  48                         return;
  49                 }
  50
  51                 if (getDelay() <= 0) {
  52                         return;
  53                 }
  54
  55                 /* Module was obviously loaded, so it is safe to load on boot */
  56                 editor.putBoolean("safe_to_load", true);
  57                 editor.commit();
  58         }
  59
  60         public synchronized void unloadModule() {
  61                 try {
  62                         Process rmmod = Runtime.getRuntime().exec(new String[]{"su","-c","/system/bin/rmmod debounce"});
  63                         rmmod.waitFor();
  64                 } catch (Exception e) {}
  65         }
  66
  67         public synchronized boolean isLoaded() {
  68                 boolean loaded = false;
  69                 try {
  70                         String read;
  71
  72                         FileReader modules = new FileReader("/proc/modules");
  73                         BufferedReader modules_buf = new BufferedReader(modules);
  74
  75                         while((read = modules_buf.readLine()) != null) {
  76                                 if (read.regionMatches(0, "debounce", 0, 8)) {
  77                                         loaded = true;
  78                                 }
  79                         }
  80
  81                 } catch (Exception e) {
  82                         loaded = false;
  83                 }
  84
  85                 return loaded;
  86         }
  87
  88         public synchronized int getDelay() {
  89                 int debounce_delay = -1;
  90
  91                 try {
  92                         String read;
  93
  94                         FileReader delay = new FileReader("/sys/module/debounce/parameters/debounce_delay");
  95                         BufferedReader delay_buf = new BufferedReader(delay);
  96
  97                         read = delay_buf.readLine();
  98                         if (read != null) {
  99                                 debounce_delay = Integer.parseInt(read.trim());
 100                         }
 101                 } catch (Exception e) {}
 102
 103                 return debounce_delay;
 104         }
 105
 106         public synchronized boolean is_safe_to_load() {
 107                 SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
 108                 boolean safe_to_load = settings.getBoolean("safe_to_load", false);
 109
 110                 return safe_to_load;
 111         }
 112
 113         private synchronized void extractModule() {
 114                 File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
 115
 116                 if (debounce_ko.exists()) {
 117                         return;
 118                 }
 119
 120                 try {
 121                         InputStream apk = ctx.getAssets().open("debounce.ko");
 122                         OutputStream mod = ctx.openFileOutput("debounce.ko.tmp", 0);
 123
 124                         //I assume a page is 4k...
 125                         byte buf[] = new byte[4096];
 126                         int bytes;
 127
 128                         while((bytes = apk.read(buf)) != -1) {
 129                                 mod.write(buf, 0, bytes);
 130                         }
 131
 132                         apk.close();
 133                         mod.close();
 134
 135                         File tmpfile = new File(debounce_ko + ".tmp");
 136                         tmpfile.renameTo(debounce_ko);
 137                 } catch (Exception e) {}
 138         }
 139 }