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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.FileWriter; | |
8 | import java.io.BufferedReader; | |
9 | import java.io.BufferedWriter; | |
10 | import java.io.DataOutputStream; | |
11 | ||
12 | import android.content.Context; | |
13 | import android.content.SharedPreferences; | |
14 | ||
15 | public class DebounceModuleHelper | |
16 | { | |
17 | private Context ctx; | |
18 | public static final String PREFS_NAME = "DebounceCfg"; | |
19 | final int SUPERUSER_REQUEST = 4223; | |
20 | ||
21 | public DebounceModuleHelper(Context context) { | |
22 | ctx = context; | |
23 | } | |
24 | ||
25 | public void loadModule() { | |
26 | _loadModule(); | |
27 | setDelay(getSavedDelay()); | |
28 | } | |
29 | ||
30 | protected void runAsRoot(String command) throws java.io.IOException,java.lang.InterruptedException { | |
31 | Process rootcmd = Runtime.getRuntime().exec(new String[]{"su","-c","sh"}); | |
32 | DataOutputStream sh = new DataOutputStream(rootcmd.getOutputStream()); | |
33 | sh.writeBytes(command + "\n"); | |
34 | sh.writeBytes("exit\n"); | |
35 | sh.flush(); | |
36 | sh.close(); | |
37 | ||
38 | rootcmd.waitFor(); | |
39 | } | |
40 | ||
41 | public synchronized void _loadModule() { | |
42 | File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko"); | |
43 | ||
44 | extractModule(); | |
45 | ||
46 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
47 | SharedPreferences.Editor editor = settings.edit(); | |
48 | if (is_safe_to_load()) { | |
49 | editor.putBoolean("safe_to_load", false); | |
50 | editor.commit(); | |
51 | } | |
52 | ||
53 | try { | |
54 | runAsRoot("/system/bin/insmod " + debounce_ko); | |
55 | } catch (Exception e) { | |
56 | return; | |
57 | } | |
58 | ||
59 | if (!isLoaded()) { | |
60 | return; | |
61 | } | |
62 | ||
63 | if (getDelay() < 0) { | |
64 | return; | |
65 | } | |
66 | ||
67 | /* Module was obviously loaded, so it is safe to load on boot */ | |
68 | editor.putBoolean("safe_to_load", true); | |
69 | editor.commit(); | |
70 | } | |
71 | ||
72 | public synchronized void unloadModule() { | |
73 | try { | |
74 | runAsRoot("/system/bin/rmmod debounce"); | |
75 | } catch (Exception e) {} | |
76 | } | |
77 | ||
78 | public synchronized boolean isLoaded() { | |
79 | boolean loaded = false; | |
80 | try { | |
81 | String read; | |
82 | ||
83 | FileReader modules = new FileReader("/proc/modules"); | |
84 | BufferedReader modules_buf = new BufferedReader(modules); | |
85 | ||
86 | while((read = modules_buf.readLine()) != null) { | |
87 | if (read.regionMatches(0, "debounce", 0, 8)) { | |
88 | loaded = true; | |
89 | } | |
90 | } | |
91 | ||
92 | } catch (Exception e) { | |
93 | loaded = false; | |
94 | } | |
95 | ||
96 | return loaded; | |
97 | } | |
98 | ||
99 | public synchronized int getDelay() { | |
100 | int debounce_delay = -1; | |
101 | ||
102 | try { | |
103 | String read; | |
104 | ||
105 | FileReader delay = new FileReader("/sys/devices/debounce/debounce_delay"); | |
106 | BufferedReader delay_buf = new BufferedReader(delay); | |
107 | ||
108 | read = delay_buf.readLine(); | |
109 | if (read != null) { | |
110 | debounce_delay = Integer.parseInt(read.trim()); | |
111 | } | |
112 | ||
113 | delay_buf.close(); | |
114 | } catch (Exception e) {} | |
115 | ||
116 | return debounce_delay; | |
117 | } | |
118 | ||
119 | public synchronized void setDelay(int debounce_delay) { | |
120 | if (!isLoaded()) { | |
121 | return; | |
122 | } | |
123 | ||
124 | try { | |
125 | FileWriter delay = new FileWriter("/sys/devices/debounce/debounce_delay"); | |
126 | BufferedWriter delay_buf = new BufferedWriter(delay); | |
127 | ||
128 | delay_buf.write((new Integer(debounce_delay)).toString()); | |
129 | ||
130 | delay_buf.close(); | |
131 | } catch (Exception e) {} | |
132 | } | |
133 | ||
134 | public synchronized int getSavedDelay() { | |
135 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
136 | ||
137 | return settings.getInt("debounce_delay", 8); | |
138 | } | |
139 | ||
140 | public synchronized void setSavedDelay(int delay) { | |
141 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
142 | SharedPreferences.Editor editor = settings.edit(); | |
143 | ||
144 | editor.putInt("debounce_delay", delay); | |
145 | editor.commit(); | |
146 | } | |
147 | ||
148 | public synchronized boolean is_safe_to_load() { | |
149 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
150 | return settings.getBoolean("safe_to_load", false); | |
151 | } | |
152 | ||
153 | public synchronized boolean get_on_boot() { | |
154 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
155 | return settings.getBoolean("on_boot", false); | |
156 | } | |
157 | ||
158 | public synchronized void set_on_boot(boolean on_boot) { | |
159 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
160 | SharedPreferences.Editor editor = settings.edit(); | |
161 | ||
162 | editor.putBoolean("on_boot", on_boot); | |
163 | editor.commit(); | |
164 | } | |
165 | ||
166 | private synchronized void extractModule() { | |
167 | File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko"); | |
168 | ||
169 | if (debounce_ko.exists()) { | |
170 | return; | |
171 | } | |
172 | ||
173 | try { | |
174 | InputStream apk = ctx.getAssets().open("debounce.ko"); | |
175 | OutputStream mod = ctx.openFileOutput("debounce.ko.tmp", 0); | |
176 | ||
177 | //I assume a page is 4k... | |
178 | byte buf[] = new byte[4096]; | |
179 | int bytes; | |
180 | ||
181 | while((bytes = apk.read(buf)) != -1) { | |
182 | mod.write(buf, 0, bytes); | |
183 | } | |
184 | ||
185 | apk.close(); | |
186 | mod.close(); | |
187 | ||
188 | File tmpfile = new File(debounce_ko + ".tmp"); | |
189 | tmpfile.renameTo(debounce_ko); | |
190 | } catch (Exception e) {} | |
191 | } | |
192 | } |