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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 | setSettle(getSavedSettle()); | |
29 | setPoll(getSavedPoll()); | |
30 | } | |
31 | ||
32 | protected void runAsRoot(String command) throws java.io.IOException,java.lang.InterruptedException { | |
33 | Process rootcmd = Runtime.getRuntime().exec(new String[]{"su","-c","sh"}); | |
34 | DataOutputStream sh = new DataOutputStream(rootcmd.getOutputStream()); | |
35 | sh.writeBytes(command + "\n"); | |
36 | sh.writeBytes("exit\n"); | |
37 | sh.flush(); | |
38 | sh.close(); | |
39 | ||
40 | rootcmd.waitFor(); | |
41 | } | |
42 | ||
43 | public synchronized void _loadModule() { | |
44 | File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko"); | |
45 | ||
46 | extractModule(); | |
47 | ||
48 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
49 | SharedPreferences.Editor editor = settings.edit(); | |
50 | if (is_safe_to_load()) { | |
51 | editor.putBoolean("safe_to_load", false); | |
52 | editor.commit(); | |
53 | } | |
54 | ||
55 | try { | |
56 | runAsRoot("/system/bin/insmod " + debounce_ko); | |
57 | } catch (Exception e) { | |
58 | return; | |
59 | } | |
60 | ||
61 | if (!isLoaded()) { | |
62 | return; | |
63 | } | |
64 | ||
65 | if (getDelay() < 0) { | |
66 | return; | |
67 | } | |
68 | ||
69 | /* Module was obviously loaded, so it is safe to load on boot */ | |
70 | editor.putBoolean("safe_to_load", true); | |
71 | editor.commit(); | |
72 | } | |
73 | ||
74 | public synchronized void unloadModule() { | |
75 | try { | |
76 | runAsRoot("/system/bin/rmmod debounce"); | |
77 | } catch (Exception e) {} | |
78 | } | |
79 | ||
80 | public synchronized boolean isLoaded() { | |
81 | boolean loaded = false; | |
82 | try { | |
83 | String read; | |
84 | ||
85 | FileReader modules = new FileReader("/proc/modules"); | |
86 | BufferedReader modules_buf = new BufferedReader(modules); | |
87 | ||
88 | while((read = modules_buf.readLine()) != null) { | |
89 | if (read.regionMatches(0, "debounce", 0, 8)) { | |
90 | loaded = true; | |
91 | } | |
92 | } | |
93 | ||
94 | } catch (Exception e) { | |
95 | loaded = false; | |
96 | } | |
97 | ||
98 | return loaded; | |
99 | } | |
100 | ||
101 | private synchronized int getValue(String parameter) { | |
102 | int value = -1; | |
103 | ||
104 | try { | |
105 | String read; | |
106 | ||
107 | FileReader fr = new FileReader("/sys/devices/debounce/" + parameter); | |
108 | BufferedReader fbuf = new BufferedReader(fr); | |
109 | ||
110 | read = fbuf.readLine(); | |
111 | if (read != null) { | |
112 | value = Integer.parseInt(read.trim()); | |
113 | } | |
114 | ||
115 | fbuf.close(); | |
116 | } catch (Exception e) {} | |
117 | ||
118 | return value; | |
119 | } | |
120 | ||
121 | private synchronized void setValue(String parameter, int value) { | |
122 | if (!isLoaded()) { | |
123 | return; | |
124 | } | |
125 | ||
126 | try { | |
127 | FileWriter fw = new FileWriter("/sys/devices/debounce/" + parameter); | |
128 | BufferedWriter fbuf = new BufferedWriter(fw); | |
129 | ||
130 | fbuf.write((new Integer(value)).toString()); | |
131 | ||
132 | fbuf.close(); | |
133 | } catch (Exception e) {} | |
134 | } | |
135 | ||
136 | public synchronized int getDelay() { | |
137 | return getValue("debounce_delay"); | |
138 | } | |
139 | ||
140 | public synchronized void setDelay(int debounce_delay) { | |
141 | setValue("debounce_delay", debounce_delay); | |
142 | } | |
143 | ||
144 | public synchronized int getSettle() { | |
145 | return getValue("settle_time"); | |
146 | } | |
147 | ||
148 | public synchronized void setSettle(int settle_time) { | |
149 | setValue("settle_time", settle_time); | |
150 | } | |
151 | ||
152 | public synchronized int getPoll() { | |
153 | return getValue("poll_time"); | |
154 | } | |
155 | ||
156 | public synchronized void setPoll(int poll_time) { | |
157 | setValue("poll_time", poll_time); | |
158 | } | |
159 | ||
160 | public synchronized int getSavedDelay() { | |
161 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
162 | ||
163 | return settings.getInt("debounce_delay", 8); | |
164 | } | |
165 | ||
166 | public synchronized void setSavedDelay(int delay) { | |
167 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
168 | SharedPreferences.Editor editor = settings.edit(); | |
169 | ||
170 | editor.putInt("debounce_delay", delay); | |
171 | editor.commit(); | |
172 | } | |
173 | ||
174 | public synchronized int getSavedSettle() { | |
175 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
176 | ||
177 | return settings.getInt("settle_time", 100); | |
178 | } | |
179 | ||
180 | public synchronized void setSavedSettle(int settle) { | |
181 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
182 | SharedPreferences.Editor editor = settings.edit(); | |
183 | ||
184 | editor.putInt("settle_time", settle); | |
185 | editor.commit(); | |
186 | } | |
187 | ||
188 | public synchronized int getSavedPoll() { | |
189 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
190 | ||
191 | return settings.getInt("poll_time", 10); | |
192 | } | |
193 | ||
194 | public synchronized void setSavedPoll(int poll) { | |
195 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
196 | SharedPreferences.Editor editor = settings.edit(); | |
197 | ||
198 | editor.putInt("poll_time", poll); | |
199 | editor.commit(); | |
200 | } | |
201 | ||
202 | public synchronized boolean is_safe_to_load() { | |
203 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
204 | return settings.getBoolean("safe_to_load", false); | |
205 | } | |
206 | ||
207 | public synchronized boolean get_on_boot() { | |
208 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
209 | return settings.getBoolean("on_boot", false); | |
210 | } | |
211 | ||
212 | public synchronized void set_on_boot(boolean on_boot) { | |
213 | SharedPreferences settings = ctx.getSharedPreferences(PREFS_NAME, Context.MODE_PRIVATE); | |
214 | SharedPreferences.Editor editor = settings.edit(); | |
215 | ||
216 | editor.putBoolean("on_boot", on_boot); | |
217 | editor.commit(); | |
218 | } | |
219 | ||
220 | private synchronized void extractModule() { | |
221 | File debounce_ko = new File(ctx.getFilesDir() + "/debounce.ko"); | |
222 | ||
223 | if (debounce_ko.exists()) { | |
224 | return; | |
225 | } | |
226 | ||
227 | try { | |
228 | InputStream apk = ctx.getAssets().open("debounce.ko"); | |
229 | OutputStream mod = ctx.openFileOutput("debounce.ko.tmp", 0); | |
230 | ||
231 | //I assume a page is 4k... | |
232 | byte buf[] = new byte[4096]; | |
233 | int bytes; | |
234 | ||
235 | while((bytes = apk.read(buf)) != -1) { | |
236 | mod.write(buf, 0, bytes); | |
237 | } | |
238 | ||
239 | apk.close(); | |
240 | mod.close(); | |
241 | ||
242 | File tmpfile = new File(debounce_ko + ".tmp"); | |
243 | tmpfile.renameTo(debounce_ko); | |
244 | } catch (Exception e) {} | |
245 | } | |
246 | } |