better interaction with superuser

[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 fe9ffa80d06a972c7a5548ec4bbb81a48ce1c96f..80dc5ff134745fabb87e4ac221252d180ff7da73 100644 (file)
--- a/MS2Debounce/src/de/rmdir/ms2debounce/DebounceModuleHelper.java
+++ b/MS2Debounce/src/de/rmdir/ms2debounce/DebounceModuleHelper.java
@@ -1,33 +1,184 @@
 package de.rmdir.ms2debounce;
 
 package de.rmdir.ms2debounce;
 

+import java.io.InputStream;
+import java.io.OutputStream;

 import java.io.File;
 import java.io.File;

+import java.io.FileReader;
+import java.io.BufferedReader;
+import java.io.DataOutputStream;
+
+import android.content.Context;
+import android.content.SharedPreferences;

 
 public class DebounceModuleHelper
 {
 
 public class DebounceModuleHelper
 {

-       private File filesdir;
+       private Context ctx;
+       public static final String PREFS_NAME = "DebounceCfg";
+       final int SUPERUSER_REQUEST = 4223;

 
 

-       public DebounceModuleHelper(File appdir) {
-               filesdir = appdir;
+       public DebounceModuleHelper(Context context) {
+               ctx = context;

        }
 
        public void loadModule() {
        }
 
        public void loadModule() {

+               loadModule(getSavedDelay());
+       }
+
+       protected void runAsRoot(String command) throws java.io.IOException,java.lang.InterruptedException {
+               Process rootcmd = Runtime.getRuntime().exec(new String[]{"su","-c","sh"});
+               DataOutputStream sh = new DataOutputStream(rootcmd.getOutputStream());
+               sh.writeBytes(command + "\n");
+               sh.writeBytes("exit\n");
+               sh.flush();
+               sh.close();
+
+               rootcmd.waitFor();
+       }
+
+       public synchronized void loadModule(int delay) {
+               File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");
+

                extractModule();
 
                extractModule();
 

+               SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+               SharedPreferences.Editor editor = settings.edit();
+               if (is_safe_to_load()) {
+                       editor.putBoolean("safe_to_load", false);
+                       editor.commit();
+               }
+
+               try {
+                       runAsRoot("/system/bin/insmod " + debounce_ko + " debounce_delay=" + delay);
+               } catch (Exception e) {
+                       return;
+               }
+
+               if (!isLoaded()) {
+                       return;
+               }
+
+               if (getDelay() <= 0) {
+                       return;
+               }
+
+               /* Module was obviously loaded, so it is safe to load on boot */
+               editor.putBoolean("safe_to_load", true);
+               editor.commit();
+       }
+
+       public synchronized void unloadModule() {
+               try {
+                       runAsRoot("/system/bin/rmmod debounce");
+               } catch (Exception e) {}
+       }
+
+       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 {
                try {

-                       Process insmod = Runtime.getRuntime().exec(new String[]{"su","-c","/system/bin/insmod /system/lib/modules/debounce.ko"});
-                       insmod.waitFor();
+                       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) {}
                } catch (Exception e) {}

+
+               return debounce_delay;
+       }
+
+       public synchronized void setDelay(int delay) {
+               if (isLoaded()) {
+                       if (getDelay() == delay) {
+                               return;
+                       }
+
+                       unloadModule();
+               }
+
+               loadModule(delay);
+       }
+
+       public synchronized int getSavedDelay() {
+               SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+
+               return settings.getInt("debounce_delay", 10);

        }
 
        }
 

-       public boolean isLoaded() {
-               return false;
+       public synchronized void setSavedDelay(int delay) {
+               SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+               SharedPreferences.Editor editor = settings.edit();
+
+               editor.putInt("debounce_delay", delay);
+               editor.commit();
+       }
+
+       public synchronized boolean is_safe_to_load() {
+               SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+               return settings.getBoolean("safe_to_load", false);
+       }
+
+       public synchronized boolean get_on_boot() {
+               SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+               return settings.getBoolean("on_boot", false);
+       }
+
+       public synchronized void set_on_boot(boolean on_boot) {
+               SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE);
+               SharedPreferences.Editor editor = settings.edit();
+
+               editor.putBoolean("on_boot", on_boot);
+               editor.commit();

        }
 
        }
 

-       private void extractModule() {
-               File debounce_ko = new File(filesdir + "/debounce.ko");
+       private synchronized void extractModule() {
+               File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko");

 
                if (debounce_ko.exists()) {
                        return;
                }
 
                if (debounce_ko.exists()) {
                        return;
                }

+
+               try {
+                       InputStream apk = ctx.getAssets().open("debounce.ko");
+                       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) {}

        }
 }
        }
 }