75607b819bcdf2524eb240ed24175301d9232133
[ms2-fixes] / 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 }
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