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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 | } |