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1 | /* |
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2 | * (C) GraÅžvydas "notaz" Ignotas, 2009-2012 |
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3 | * |
4 | * This work is licensed under the terms of any of these licenses |
5 | * (at your option): |
6 | * - GNU GPL, version 2 or later. |
7 | * - GNU LGPL, version 2.1 or later. |
8 | * See the COPYING file in the top-level directory. |
9 | */ |
10 | |
11 | #include <stdio.h> |
12 | #include <string.h> |
13 | #include <pthread.h> |
14 | |
15 | #include <dlfcn.h> |
16 | #include <X11/Xlib.h> |
17 | #include <X11/Xutil.h> |
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18 | #include <X11/XKBlib.h> |
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19 | |
20 | #include <sys/types.h> |
21 | #include <sys/stat.h> |
22 | #include <fcntl.h> |
23 | #include <unistd.h> |
24 | #include <sys/ioctl.h> |
25 | #include <termios.h> |
26 | #include <linux/kd.h> |
27 | |
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28 | #define PFX "xenv: " |
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29 | |
30 | #define FPTR(f) typeof(f) * p##f |
31 | #define FPTR_LINK(xf, dl, f) { \ |
32 | xf.p##f = dlsym(dl, #f); \ |
33 | if (xf.p##f == NULL) { \ |
34 | fprintf(stderr, "missing symbol: %s\n", #f); \ |
35 | goto fail; \ |
36 | } \ |
37 | } |
38 | |
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39 | struct xstuff { |
40 | Display *display; |
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41 | Window window; |
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42 | FPTR(XCreateBitmapFromData); |
43 | FPTR(XCreatePixmapCursor); |
44 | FPTR(XFreePixmap); |
45 | FPTR(XOpenDisplay); |
46 | FPTR(XDisplayName); |
47 | FPTR(XCloseDisplay); |
48 | FPTR(XCreateSimpleWindow); |
49 | FPTR(XChangeWindowAttributes); |
50 | FPTR(XSelectInput); |
51 | FPTR(XMapWindow); |
52 | FPTR(XNextEvent); |
53 | FPTR(XCheckTypedEvent); |
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54 | FPTR(XWithdrawWindow); |
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55 | FPTR(XGrabKeyboard); |
56 | FPTR(XPending); |
57 | FPTR(XLookupKeysym); |
58 | FPTR(XkbSetDetectableAutoRepeat); |
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59 | FPTR(XStoreName); |
60 | FPTR(XIconifyWindow); |
61 | FPTR(XMoveResizeWindow); |
62 | FPTR(XInternAtom); |
63 | FPTR(XSetWMHints); |
64 | FPTR(XSync); |
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65 | }; |
66 | |
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67 | static struct xstuff g_xstuff; |
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68 | |
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69 | static Cursor transparent_cursor(struct xstuff *xf, Display *display, Window win) |
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70 | { |
71 | Cursor cursor; |
72 | Pixmap pix; |
73 | XColor dummy; |
74 | char d = 0; |
75 | |
76 | memset(&dummy, 0, sizeof(dummy)); |
77 | pix = xf->pXCreateBitmapFromData(display, win, &d, 1, 1); |
78 | cursor = xf->pXCreatePixmapCursor(display, pix, pix, |
79 | &dummy, &dummy, 0, 0); |
80 | xf->pXFreePixmap(display, pix); |
81 | return cursor; |
82 | } |
83 | |
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84 | static int x11h_init(const char *window_title) |
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85 | { |
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86 | unsigned int display_width, display_height; |
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87 | Display *display; |
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88 | XSetWindowAttributes attributes; |
89 | Window win; |
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90 | Visual *visual; |
91 | void *x11lib; |
92 | int screen; |
93 | |
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94 | memset(&g_xstuff, 0, sizeof(g_xstuff)); |
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95 | x11lib = dlopen("libX11.so.6", RTLD_LAZY); |
96 | if (x11lib == NULL) { |
97 | fprintf(stderr, "libX11.so load failed:\n%s\n", dlerror()); |
98 | goto fail; |
99 | } |
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100 | FPTR_LINK(g_xstuff, x11lib, XCreateBitmapFromData); |
101 | FPTR_LINK(g_xstuff, x11lib, XCreatePixmapCursor); |
102 | FPTR_LINK(g_xstuff, x11lib, XFreePixmap); |
103 | FPTR_LINK(g_xstuff, x11lib, XOpenDisplay); |
104 | FPTR_LINK(g_xstuff, x11lib, XDisplayName); |
105 | FPTR_LINK(g_xstuff, x11lib, XCloseDisplay); |
106 | FPTR_LINK(g_xstuff, x11lib, XCreateSimpleWindow); |
107 | FPTR_LINK(g_xstuff, x11lib, XChangeWindowAttributes); |
108 | FPTR_LINK(g_xstuff, x11lib, XSelectInput); |
109 | FPTR_LINK(g_xstuff, x11lib, XMapWindow); |
110 | FPTR_LINK(g_xstuff, x11lib, XNextEvent); |
111 | FPTR_LINK(g_xstuff, x11lib, XCheckTypedEvent); |
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112 | FPTR_LINK(g_xstuff, x11lib, XWithdrawWindow); |
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113 | FPTR_LINK(g_xstuff, x11lib, XGrabKeyboard); |
114 | FPTR_LINK(g_xstuff, x11lib, XPending); |
115 | FPTR_LINK(g_xstuff, x11lib, XLookupKeysym); |
116 | FPTR_LINK(g_xstuff, x11lib, XkbSetDetectableAutoRepeat); |
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117 | FPTR_LINK(g_xstuff, x11lib, XStoreName); |
118 | FPTR_LINK(g_xstuff, x11lib, XIconifyWindow); |
119 | FPTR_LINK(g_xstuff, x11lib, XMoveResizeWindow); |
120 | FPTR_LINK(g_xstuff, x11lib, XInternAtom); |
121 | FPTR_LINK(g_xstuff, x11lib, XSetWMHints); |
122 | FPTR_LINK(g_xstuff, x11lib, XSync); |
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123 | |
124 | //XInitThreads(); |
125 | |
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126 | g_xstuff.display = display = g_xstuff.pXOpenDisplay(NULL); |
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127 | if (display == NULL) |
128 | { |
129 | fprintf(stderr, "cannot connect to X server %s, X handling disabled.\n", |
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130 | g_xstuff.pXDisplayName(NULL)); |
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131 | goto fail2; |
132 | } |
133 | |
134 | visual = DefaultVisual(display, 0); |
135 | if (visual->class != TrueColor) |
136 | fprintf(stderr, PFX "warning: non true color visual\n"); |
137 | |
138 | printf(PFX "X vendor: %s, rel: %d, display: %s, protocol ver: %d.%d\n", ServerVendor(display), |
139 | VendorRelease(display), DisplayString(display), ProtocolVersion(display), |
140 | ProtocolRevision(display)); |
141 | |
142 | screen = DefaultScreen(display); |
143 | |
144 | display_width = DisplayWidth(display, screen); |
145 | display_height = DisplayHeight(display, screen); |
146 | printf(PFX "display is %dx%d\n", display_width, display_height); |
147 | |
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148 | g_xstuff.window = win = g_xstuff.pXCreateSimpleWindow(display, |
149 | RootWindow(display, screen), 0, 0, display_width, display_height, |
150 | 0, BlackPixel(display, screen), BlackPixel(display, screen)); |
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151 | |
152 | attributes.override_redirect = True; |
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153 | attributes.cursor = transparent_cursor(&g_xstuff, display, win); |
154 | g_xstuff.pXChangeWindowAttributes(display, win, CWOverrideRedirect | CWCursor, &attributes); |
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155 | |
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156 | g_xstuff.pXStoreName(display, win, window_title); |
157 | g_xstuff.pXSelectInput(display, win, |
158 | ExposureMask | FocusChangeMask | KeyPressMask | KeyReleaseMask | PropertyChangeMask); |
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159 | g_xstuff.pXMapWindow(display, win); |
160 | g_xstuff.pXGrabKeyboard(display, win, False, GrabModeAsync, GrabModeAsync, CurrentTime); |
161 | g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL); |
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162 | // XSetIOErrorHandler |
163 | |
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164 | // we don't know when event dispatch will be called, so sync now |
165 | g_xstuff.pXSync(display, False); |
166 | |
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167 | return 0; |
168 | fail2: |
169 | dlclose(x11lib); |
170 | fail: |
171 | g_xstuff.display = NULL; |
172 | fprintf(stderr, "x11 handling disabled.\n"); |
173 | return -1; |
174 | } |
175 | |
176 | static int x11h_update(int *is_down) |
177 | { |
178 | XEvent evt; |
179 | |
180 | while (g_xstuff.pXPending(g_xstuff.display)) |
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181 | { |
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182 | g_xstuff.pXNextEvent(g_xstuff.display, &evt); |
183 | switch (evt.type) |
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184 | { |
185 | case Expose: |
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186 | while (g_xstuff.pXCheckTypedEvent(g_xstuff.display, Expose, &evt)) |
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187 | ; |
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188 | default: |
189 | // printf("event %d\n", evt.type); |
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190 | break; |
191 | |
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192 | case KeyPress: |
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193 | *is_down = 1; |
194 | return g_xstuff.pXLookupKeysym(&evt.xkey, 0); |
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195 | |
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196 | case KeyRelease: |
197 | *is_down = 0; |
198 | return g_xstuff.pXLookupKeysym(&evt.xkey, 0); |
199 | // printf("press %d\n", evt.xkey.keycode); |
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200 | } |
201 | } |
202 | |
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203 | return NoSymbol; |
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204 | } |
205 | |
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206 | static void x11h_wait_vmstate(void) |
207 | { |
208 | Atom wm_state = g_xstuff.pXInternAtom(g_xstuff.display, "WM_STATE", False); |
209 | XEvent evt; |
210 | int i; |
211 | |
212 | usleep(20000); |
213 | |
214 | for (i = 0; i < 20; i++) { |
215 | while (g_xstuff.pXPending(g_xstuff.display)) { |
216 | g_xstuff.pXNextEvent(g_xstuff.display, &evt); |
217 | // printf("w event %d\n", evt.type); |
218 | if (evt.type == PropertyNotify && evt.xproperty.atom == wm_state) |
219 | return; |
220 | } |
221 | usleep(200000); |
222 | } |
223 | |
224 | printf("timeout waiting for wm_state change\n"); |
225 | } |
226 | |
227 | static int x11h_minimize(void) |
228 | { |
229 | XSetWindowAttributes attributes; |
230 | Display *display = g_xstuff.display; |
231 | Window window = g_xstuff.window; |
232 | int screen = DefaultScreen(g_xstuff.display); |
233 | int display_width, display_height; |
234 | XWMHints wm_hints; |
235 | XEvent evt; |
236 | |
237 | g_xstuff.pXWithdrawWindow(display, window, screen); |
238 | |
239 | attributes.override_redirect = False; |
240 | g_xstuff.pXChangeWindowAttributes(display, window, |
241 | CWOverrideRedirect, &attributes); |
242 | |
243 | wm_hints.flags = StateHint; |
244 | wm_hints.initial_state = IconicState; |
245 | g_xstuff.pXSetWMHints(display, window, &wm_hints); |
246 | |
247 | g_xstuff.pXMapWindow(display, window); |
248 | |
249 | while (g_xstuff.pXNextEvent(display, &evt) == 0) |
250 | { |
251 | // printf("m event %d\n", evt.type); |
252 | switch (evt.type) |
253 | { |
254 | case FocusIn: |
255 | goto out; |
256 | default: |
257 | break; |
258 | } |
259 | } |
260 | |
261 | out: |
262 | g_xstuff.pXWithdrawWindow(display, window, screen); |
263 | |
264 | // must wait for some magic vmstate property change before setting override_redirect |
265 | x11h_wait_vmstate(); |
266 | |
267 | attributes.override_redirect = True; |
268 | g_xstuff.pXChangeWindowAttributes(display, window, |
269 | CWOverrideRedirect, &attributes); |
270 | |
271 | // fixup window after resize on override_redirect loss |
272 | display_width = DisplayWidth(display, screen); |
273 | display_height = DisplayHeight(display, screen); |
274 | g_xstuff.pXMoveResizeWindow(display, window, 0, 0, display_width, display_height); |
275 | |
276 | g_xstuff.pXMapWindow(display, window); |
277 | g_xstuff.pXGrabKeyboard(display, window, False, GrabModeAsync, GrabModeAsync, CurrentTime); |
278 | g_xstuff.pXkbSetDetectableAutoRepeat(display, 1, NULL); |
279 | |
280 | // we don't know when event dispatch will be called, so sync now |
281 | g_xstuff.pXSync(display, False); |
282 | |
283 | return 0; |
284 | } |
285 | |
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286 | static struct termios g_kbd_termios_saved; |
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287 | static int g_kbdfd = -1; |
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288 | |
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289 | static int tty_init(void) |
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290 | { |
291 | struct termios kbd_termios; |
292 | int mode; |
293 | |
294 | g_kbdfd = open("/dev/tty", O_RDWR); |
295 | if (g_kbdfd == -1) { |
296 | perror(PFX "open /dev/tty"); |
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297 | return -1; |
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298 | } |
299 | |
300 | if (ioctl(g_kbdfd, KDGETMODE, &mode) == -1) { |
301 | perror(PFX "(not hiding FB): KDGETMODE"); |
302 | goto fail; |
303 | } |
304 | |
305 | if (tcgetattr(g_kbdfd, &kbd_termios) == -1) { |
306 | perror(PFX "tcgetattr"); |
307 | goto fail; |
308 | } |
309 | |
310 | g_kbd_termios_saved = kbd_termios; |
311 | kbd_termios.c_lflag &= ~(ICANON | ECHO); // | ISIG); |
312 | kbd_termios.c_iflag &= ~(ISTRIP | IGNCR | ICRNL | INLCR | IXOFF | IXON); |
313 | kbd_termios.c_cc[VMIN] = 0; |
314 | kbd_termios.c_cc[VTIME] = 0; |
315 | |
316 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &kbd_termios) == -1) { |
317 | perror(PFX "tcsetattr"); |
318 | goto fail; |
319 | } |
320 | |
321 | if (ioctl(g_kbdfd, KDSETMODE, KD_GRAPHICS) == -1) { |
322 | perror(PFX "KDSETMODE KD_GRAPHICS"); |
323 | tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved); |
324 | goto fail; |
325 | } |
326 | |
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327 | return 0; |
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328 | |
329 | fail: |
330 | close(g_kbdfd); |
331 | g_kbdfd = -1; |
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332 | return -1; |
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333 | } |
334 | |
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335 | static void tty_end(void) |
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336 | { |
337 | if (g_kbdfd < 0) |
338 | return; |
339 | |
340 | if (ioctl(g_kbdfd, KDSETMODE, KD_TEXT) == -1) |
341 | perror(PFX "KDSETMODE KD_TEXT"); |
342 | |
343 | if (tcsetattr(g_kbdfd, TCSAFLUSH, &g_kbd_termios_saved) == -1) |
344 | perror(PFX "tcsetattr"); |
345 | |
346 | close(g_kbdfd); |
347 | g_kbdfd = -1; |
348 | } |
349 | |
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350 | int xenv_init(const char *window_title) |
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351 | { |
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352 | int ret; |
353 | |
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354 | ret = x11h_init(window_title); |
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355 | if (ret == 0) |
356 | return 0; |
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357 | |
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358 | ret = tty_init(); |
359 | if (ret == 0) |
360 | return 0; |
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361 | |
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362 | fprintf(stderr, PFX "error: both x11h_init and tty_init failed\n"); |
363 | return -1; |
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364 | } |
365 | |
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366 | int xenv_update(int *is_down) |
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367 | { |
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368 | if (g_xstuff.display) |
369 | return x11h_update(is_down); |
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370 | |
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371 | // TODO: read tty? |
372 | return -1; |
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373 | } |
374 | |
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375 | /* blocking minimize until user maximazes again */ |
376 | int xenv_minimize(void) |
377 | { |
378 | int ret, dummy; |
379 | |
380 | if (g_xstuff.display) { |
381 | xenv_update(&dummy); |
382 | ret = x11h_minimize(); |
383 | xenv_update(&dummy); |
384 | return ret; |
385 | } |
386 | |
387 | return -1; |
388 | } |
389 | |
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390 | void xenv_finish(void) |
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391 | { |
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392 | // TODO: cleanup X? |
393 | tty_end(); |
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394 | } |
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395 | |
396 | #if 0 |
397 | int main() |
398 | { |
399 | int i, r, d; |
400 | |
401 | xenv_init("just a test"); |
402 | |
403 | for (i = 0; i < 5; i++) { |
404 | while ((r = xenv_update(&d)) > 0) |
405 | printf("%d %x %d\n", d, r, r); |
406 | sleep(1); |
407 | |
408 | if (i == 1) |
409 | xenv_minimize(); |
410 | printf("ll %d\n", i); |
411 | } |
412 | |
413 | printf("xenv_finish..\n"); |
414 | xenv_finish(); |
415 | |
416 | return 0; |
417 | } |
418 | #endif |