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