Check if it is safe to load the module on boot

[ms2-fixes] / MS2Debounce / src / de / rmdir / ms2debounce / DebounceModuleHelper.java

diff --git a/MS2Debounce/src/de/rmdir/ms2debounce/DebounceModuleHelper.java b/MS2Debounce/src/de/rmdir/ms2debounce/DebounceModuleHelper.java
index 2f9804cda64cdd463a55a1259dc21a7d106140f9..93fd221a54fe3aa85961cfd60823b58d12cfc679 100644 (file)
--- a/MS2Debounce/src/de/rmdir/ms2debounce/DebounceModuleHelper.java
+++ b/MS2Debounce/src/de/rmdir/ms2debounce/DebounceModuleHelper.java
@@ -3,28 +3,106 @@ package de.rmdir.ms2debounce;
 import java.io.InputStream;
 import java.io.OutputStream;
 import java.io.File;
+import java.io.FileReader;
+import java.io.BufferedReader;
 
 import android.content.Context;
+import android.content.SharedPreferences;
 
 public class DebounceModuleHelper
 {
        private Context ctx;
+       public static final String PREFS_NAME = "DebounceCfg";
 
        public DebounceModuleHelper(Context context) {
                ctx = context;
        }
 
        public void loadModule() {
+               SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+
+               int delay = settings.getInt("debounce_delay", 10);
+               loadModule(delay);
+       }
+
+       public synchronized void loadModule(int delay) {
+               File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
+
                extractModule();
 
+               // FIXME: Read settings from database...
+
                try {
-                       Process insmod = Runtime.getRuntime().exec(new String[]{"su","-c","/system/bin/insmod /system/lib/modules/debounce.ko"});
+                       Process insmod = Runtime.getRuntime().exec(new String[]{"su","-c","/system/bin/insmod " + debounce_ko + " debounce_delay=" + delay});
                        insmod.waitFor();
+               } catch (Exception e) {
+                       return;
+               }
+       
+               if (getDelay() <= 0) {
+                       return;
+               }
+
+               /* Module was obviously loaded, so it is safe to load on boot */
+               if (!is_safe_to_load()) {
+                       SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+                       SharedPreferences.Editor editor = settings.edit();
+                       editor.putBoolean("safe_to_load", true);
+                       editor.commit();
+               }
+       }
+
+       public synchronized void unloadModule() {
+               try {
+                       Process rmmod = Runtime.getRuntime().exec(new String[]{"su","-c","/system/bin/rmmod debounce"});
+                       rmmod.waitFor();
                } catch (Exception e) {}
        }
 
-       public boolean isLoaded() {
-               return false;
+       public synchronized boolean isLoaded() {
+               boolean loaded = false;
+               try {
+                       String read;
+
+                       FileReader modules = new FileReader("/proc/modules");
+                       BufferedReader modules_buf = new BufferedReader(modules);
+
+                       while((read = modules_buf.readLine()) != null) {
+                               if (read.regionMatches(0, "debounce", 0, 8)) {
+                                       loaded = true;
+                               }
+                       }
+
+               } catch (Exception e) {
+                       loaded = false;
+               }
+
+               return loaded;
+       }
+
+       public synchronized int getDelay() {
+               int debounce_delay = -1;
+
+               try {
+                       String read;
+
+                       FileReader delay = new FileReader("/sys/module/debounce/parameters/debounce_delay");
+                       BufferedReader delay_buf = new BufferedReader(delay);
+
+                       read = delay_buf.readLine();
+                       if (read != null) {
+                               debounce_delay = Integer.parseInt(read.trim());
+                       }
+               } catch (Exception e) {}
+
+               return debounce_delay;
+       }
+
+       public synchronized boolean is_safe_to_load() {
+               SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+               boolean safe_to_load = settings.getBoolean("safe_to_load", false);
+
+               return safe_to_load;
        }
 
        private synchronized void extractModule() {
@@ -36,10 +114,21 @@ public class DebounceModuleHelper
 
                try {
                        InputStream apk = ctx.getAssets().open("debounce.ko");
-                       OutputStream mod = ctx.openFileOutput("debounce.ko", 0);
+                       OutputStream mod = ctx.openFileOutput("debounce.ko.tmp", 0);
+
+                       //I assume a page is 4k...
+                       byte buf[] = new byte[4096];
+                       int bytes;
+
+                       while((bytes = apk.read(buf)) != -1) {
+                               mod.write(buf, 0, bytes);
+                       }
 
                        apk.close();
                        mod.close();
+
+                       File tmpfile = new File(debounce_ko + ".tmp");
+                       tmpfile.renameTo(debounce_ko);
                } catch (Exception e) {}
        }
 }