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1 | #include <stdio.h> |
2 | #include <string.h> |
3 | #include <pthread.h> |
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4 | |
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5 | #include <dlfcn.h> |
6 | #include <X11/Xlib.h> |
7 | #include <X11/Xutil.h> |
8 | |
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9 | #include <sys/types.h> |
10 | #include <sys/stat.h> |
11 | #include <fcntl.h> |
12 | #include <unistd.h> |
13 | #include <sys/ioctl.h> |
14 | #include <termios.h> |
15 | #include <linux/kd.h> |
16 | |
17 | #define PFX "oshide: " |
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18 | |
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19 | #define FPTR(f) typeof(f) * p##f |
20 | #define FPTR_LINK(xf, dl, f) { \ |
21 | xf.p##f = dlsym(dl, #f); \ |
22 | if (xf.p##f == NULL) { \ |
23 | fprintf(stderr, "missing symbol: %s\n", #f); \ |
24 | goto fail; \ |
25 | } \ |
26 | } |
27 | |
28 | struct xfuncs { |
29 | FPTR(XCreateBitmapFromData); |
30 | FPTR(XCreatePixmapCursor); |
31 | FPTR(XFreePixmap); |
32 | FPTR(XOpenDisplay); |
33 | FPTR(XDisplayName); |
34 | FPTR(XCloseDisplay); |
35 | FPTR(XCreateSimpleWindow); |
36 | FPTR(XChangeWindowAttributes); |
37 | FPTR(XSelectInput); |
38 | FPTR(XMapWindow); |
39 | FPTR(XNextEvent); |
40 | FPTR(XCheckTypedEvent); |
41 | FPTR(XUnmapWindow); |
42 | FPTR(XGrabKeyboard); |
43 | }; |
44 | |
45 | |
46 | static Cursor transparent_cursor(struct xfuncs *xf, Display *display, Window win) |
47 | { |
48 | Cursor cursor; |
49 | Pixmap pix; |
50 | XColor dummy; |
51 | char d = 0; |
52 | |
53 | memset(&dummy, 0, sizeof(dummy)); |
54 | pix = xf->pXCreateBitmapFromData(display, win, &d, 1, 1); |
55 | cursor = xf->pXCreatePixmapCursor(display, pix, pix, |
56 | &dummy, &dummy, 0, 0); |
57 | xf->pXFreePixmap(display, pix); |
58 | return cursor; |
59 | } |
60 | |
61 | static void *x11h_handler(void *arg) |
62 | { |
63 | struct xfuncs xf; |
64 | unsigned int display_width, display_height; |
65 | XSetWindowAttributes attributes; |
66 | Window win; |
67 | XEvent report; |
68 | Display *display; |
69 | Visual *visual; |
70 | void *x11lib; |
71 | int screen; |
72 | |
73 | memset(&xf, 0, sizeof(xf)); |
74 | x11lib = dlopen("libX11.so.6", RTLD_LAZY); |
75 | if (x11lib == NULL) { |
76 | fprintf(stderr, "libX11.so load failed:\n%s\n", dlerror()); |
77 | goto fail; |
78 | } |
79 | FPTR_LINK(xf, x11lib, XCreateBitmapFromData); |
80 | FPTR_LINK(xf, x11lib, XCreatePixmapCursor); |
81 | FPTR_LINK(xf, x11lib, XFreePixmap); |
82 | FPTR_LINK(xf, x11lib, XOpenDisplay); |
83 | FPTR_LINK(xf, x11lib, XDisplayName); |
84 | FPTR_LINK(xf, x11lib, XCloseDisplay); |
85 | FPTR_LINK(xf, x11lib, XCreateSimpleWindow); |
86 | FPTR_LINK(xf, x11lib, XChangeWindowAttributes); |
87 | FPTR_LINK(xf, x11lib, XSelectInput); |
88 | FPTR_LINK(xf, x11lib, XMapWindow); |
89 | FPTR_LINK(xf, x11lib, XNextEvent); |
90 | FPTR_LINK(xf, x11lib, XCheckTypedEvent); |
91 | FPTR_LINK(xf, x11lib, XUnmapWindow); |
92 | FPTR_LINK(xf, x11lib, XGrabKeyboard); |
93 | |
94 | //XInitThreads(); |
95 | |
96 | display = xf.pXOpenDisplay(NULL); |
97 | if (display == NULL) |
98 | { |
99 | fprintf(stderr, "cannot connect to X server %s, X handling disabled.\n", |
100 | xf.pXDisplayName(NULL)); |
101 | goto fail2; |
102 | } |
103 | |
104 | visual = DefaultVisual(display, 0); |
105 | if (visual->class != TrueColor) |
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106 | fprintf(stderr, PFX "warning: non true color visual\n"); |
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107 | |
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108 | printf(PFX "X vendor: %s, rel: %d, display: %s, protocol ver: %d.%d\n", ServerVendor(display), |
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109 | VendorRelease(display), DisplayString(display), ProtocolVersion(display), |
110 | ProtocolRevision(display)); |
111 | |
112 | screen = DefaultScreen(display); |
113 | |
114 | display_width = DisplayWidth(display, screen); |
115 | display_height = DisplayHeight(display, screen); |
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116 | printf(PFX "display is %dx%d\n", display_width, display_height); |
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117 | |
118 | win = xf.pXCreateSimpleWindow(display, |
119 | RootWindow(display, screen), |
120 | 0, 0, display_width, display_height, 0, |
121 | BlackPixel(display, screen), |
122 | BlackPixel(display, screen)); |
123 | |
124 | attributes.override_redirect = True; |
125 | attributes.cursor = transparent_cursor(&xf, display, win); |
126 | xf.pXChangeWindowAttributes(display, win, CWOverrideRedirect | CWCursor, &attributes); |
127 | |
128 | xf.pXSelectInput(display, win, ExposureMask | FocusChangeMask | KeyPressMask | KeyReleaseMask); |
129 | xf.pXMapWindow(display, win); |
130 | xf.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime); |
131 | // XSetIOErrorHandler |
132 | |
133 | while (1) |
134 | { |
135 | xf.pXNextEvent(display, &report); |
136 | switch (report.type) |
137 | { |
138 | case Expose: |
139 | while (xf.pXCheckTypedEvent(display, Expose, &report)) |
140 | ; |
141 | break; |
142 | |
143 | case FocusOut: |
144 | // XFocusChangeEvent |
145 | // printf("focus out\n"); |
146 | // xf.pXUnmapWindow(display, win); |
147 | break; |
148 | |
149 | case KeyPress: |
150 | // printf("press %d\n", report.xkey.keycode); |
151 | break; |
152 | |
153 | default: |
154 | break; |
155 | } |
156 | } |
157 | |
158 | fail2: |
159 | dlclose(x11lib); |
160 | fail: |
161 | fprintf(stderr, "x11 handling disabled.\n"); |
162 | return NULL; |
163 | } |
164 | |
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165 | static struct termios g_kbd_termios_saved; |
166 | static int g_kbdfd; |
167 | |
168 | static void hidecon_start(void) |
169 | { |
170 | struct termios kbd_termios; |
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171 | int mode; |
172 | |
173 | g_kbdfd = open("/dev/tty", O_RDWR); |
174 | if (g_kbdfd == -1) { |
175 | perror(PFX "open /dev/tty"); |
176 | return; |
177 | } |
178 | |
179 | if (ioctl(g_kbdfd, KDGETMODE, &mode) == -1) { |
180 | perror(PFX "(not hiding FB): KDGETMODE"); |
181 | goto fail; |
182 | } |
183 | |
184 | if (tcgetattr(g_kbdfd, &kbd_termios) == -1) { |
185 | perror(PFX "tcgetattr"); |
186 | goto fail; |
187 | } |
188 | |
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189 | g_kbd_termios_saved = kbd_termios; |
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190 | kbd_termios.c_lflag &= ~(ICANON | ECHO); // | ISIG); |
191 | kbd_termios.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON); |
192 | kbd_termios.c_cc[VMIN] = 0; |
193 | kbd_termios.c_cc[VTIME] = 0; |
194 | |
195 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &kbd_termios) == -1) { |
196 | perror(PFX "tcsetattr"); |
197 | goto fail; |
198 | } |
199 | |
200 | if (ioctl(g_kbdfd, KDSETMODE, KD_GRAPHICS) == -1) { |
201 | perror(PFX "KDSETMODE KD_GRAPHICS"); |
202 | tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved); |
203 | goto fail; |
204 | } |
205 | |
206 | return; |
207 | |
208 | fail: |
209 | close(g_kbdfd); |
210 | g_kbdfd = -1; |
211 | } |
212 | |
213 | static void hidecon_end(void) |
214 | { |
215 | if (g_kbdfd < 0) |
216 | return; |
217 | |
218 | if (ioctl(g_kbdfd, KDSETMODE, KD_TEXT) == -1) |
219 | perror(PFX "KDSETMODE KD_TEXT"); |
220 | |
221 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved) == -1) |
222 | perror(PFX "tcsetattr"); |
223 | |
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224 | close(g_kbdfd); |
225 | g_kbdfd = -1; |
226 | } |
227 | |
228 | int oshide_init(void) |
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229 | { |
230 | pthread_t tid; |
231 | int ret; |
232 | |
233 | ret = pthread_create(&tid, NULL, x11h_handler, NULL); |
234 | if (ret != 0) { |
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235 | fprintf(stderr, PFX "failed to create thread: %d\n", ret); |
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236 | return ret; |
237 | } |
238 | pthread_detach(tid); |
239 | |
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240 | hidecon_start(); |
241 | |
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242 | return 0; |
243 | } |
244 | |
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245 | void oshide_finish(void) |
246 | { |
247 | /* XXX: the X thread.. */ |
248 | |
249 | hidecon_end(); |
250 | } |
251 | |
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252 | #if 0 |
253 | int main() |
254 | { |
255 | x11h_init(); |
256 | sleep(5); |
257 | } |
258 | #endif |