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5eef597e MP |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com> | |
7 | ||
8 | systemd is free software; you can redistribute it and/or modify it | |
9 | under the terms of the GNU Lesser General Public License as published by | |
10 | the Free Software Foundation; either version 2.1 of the License, or | |
11 | (at your option) any later version. | |
12 | ||
13 | systemd is distributed in the hope that it will be useful, but | |
14 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | Lesser General Public License for more details. | |
17 | ||
18 | You should have received a copy of the GNU Lesser General Public License | |
19 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
20 | ***/ | |
21 | ||
22 | /* | |
23 | * Modeset Testing | |
24 | * The modeset tool attaches to the session of the caller and shows a | |
25 | * test-pattern on all displays of this session. It is meant as debugging tool | |
26 | * for the grdev infrastructure. | |
27 | */ | |
28 | ||
29 | #include <drm_fourcc.h> | |
30 | #include <errno.h> | |
31 | #include <getopt.h> | |
32 | #include <linux/kd.h> | |
5eef597e MP |
33 | #include <stdbool.h> |
34 | #include <stdio.h> | |
35 | #include <stdlib.h> | |
5eef597e MP |
36 | #include <sys/ioctl.h> |
37 | #include <sys/stat.h> | |
5eef597e MP |
38 | #include <termios.h> |
39 | #include <unistd.h> | |
86f210e9 MP |
40 | #include "sd-bus.h" |
41 | #include "sd-event.h" | |
42 | #include "sd-login.h" | |
5eef597e | 43 | #include "build.h" |
5eef597e | 44 | #include "macro.h" |
e3bff60a | 45 | #include "random-util.h" |
86f210e9 MP |
46 | #include "signal-util.h" |
47 | #include "util.h" | |
48 | #include "grdev.h" | |
49 | #include "sysview.h" | |
5eef597e MP |
50 | |
51 | typedef struct Modeset Modeset; | |
52 | ||
53 | struct Modeset { | |
54 | char *session; | |
55 | char *seat; | |
56 | sd_event *event; | |
57 | sd_bus *bus; | |
58 | sd_event_source *exit_src; | |
59 | sysview_context *sysview; | |
60 | grdev_context *grdev; | |
61 | grdev_session *grdev_session; | |
62 | ||
63 | uint8_t r, g, b; | |
64 | bool r_up, g_up, b_up; | |
65 | ||
66 | bool my_tty : 1; | |
67 | bool managed : 1; | |
68 | }; | |
69 | ||
70 | static int modeset_exit_fn(sd_event_source *source, void *userdata) { | |
71 | Modeset *m = userdata; | |
72 | ||
73 | if (m->grdev_session) | |
74 | grdev_session_restore(m->grdev_session); | |
75 | ||
76 | return 0; | |
77 | } | |
78 | ||
79 | static Modeset *modeset_free(Modeset *m) { | |
80 | if (!m) | |
81 | return NULL; | |
82 | ||
83 | m->grdev_session = grdev_session_free(m->grdev_session); | |
84 | m->grdev = grdev_context_unref(m->grdev); | |
85 | m->sysview = sysview_context_free(m->sysview); | |
86 | m->exit_src = sd_event_source_unref(m->exit_src); | |
87 | m->bus = sd_bus_unref(m->bus); | |
88 | m->event = sd_event_unref(m->event); | |
89 | free(m->seat); | |
90 | free(m->session); | |
91 | free(m); | |
92 | ||
93 | return NULL; | |
94 | } | |
95 | ||
96 | DEFINE_TRIVIAL_CLEANUP_FUNC(Modeset*, modeset_free); | |
97 | ||
98 | static bool is_my_tty(const char *session) { | |
99 | unsigned int vtnr; | |
100 | struct stat st; | |
101 | long mode; | |
102 | int r; | |
103 | ||
104 | /* Using logind's Controller API is highly fragile if there is already | |
105 | * a session controller running. If it is registered as controller | |
106 | * itself, TakeControl will simply fail. But if its a legacy controller | |
107 | * that does not use logind's controller API, we must never register | |
108 | * our own controller. Otherwise, we really mess up the VT. Therefore, | |
109 | * only run in managed mode if there's no-one else. Furthermore, never | |
110 | * try to access graphics devices if there's someone else. Unlike input | |
111 | * devices, graphics devies cannot be shared easily. */ | |
112 | ||
113 | if (!isatty(1)) | |
114 | return false; | |
115 | ||
116 | if (!session) | |
117 | return false; | |
118 | ||
119 | r = sd_session_get_vt(session, &vtnr); | |
120 | if (r < 0 || vtnr < 1 || vtnr > 63) | |
121 | return false; | |
122 | ||
123 | mode = 0; | |
124 | r = ioctl(1, KDGETMODE, &mode); | |
125 | if (r < 0 || mode != KD_TEXT) | |
126 | return false; | |
127 | ||
128 | r = fstat(1, &st); | |
129 | if (r < 0 || minor(st.st_rdev) != vtnr) | |
130 | return false; | |
131 | ||
132 | return true; | |
133 | } | |
134 | ||
135 | static int modeset_new(Modeset **out) { | |
136 | _cleanup_(modeset_freep) Modeset *m = NULL; | |
137 | int r; | |
138 | ||
139 | assert(out); | |
140 | ||
141 | m = new0(Modeset, 1); | |
142 | if (!m) | |
143 | return log_oom(); | |
144 | ||
145 | r = sd_pid_get_session(getpid(), &m->session); | |
f47781d8 MP |
146 | if (r < 0) |
147 | return log_error_errno(r, "Cannot retrieve logind session: %m"); | |
5eef597e MP |
148 | |
149 | r = sd_session_get_seat(m->session, &m->seat); | |
f47781d8 MP |
150 | if (r < 0) |
151 | return log_error_errno(r, "Cannot retrieve seat of logind session: %m"); | |
5eef597e MP |
152 | |
153 | m->my_tty = is_my_tty(m->session); | |
154 | m->managed = m->my_tty && geteuid() > 0; | |
155 | ||
156 | m->r = rand() % 0xff; | |
157 | m->g = rand() % 0xff; | |
158 | m->b = rand() % 0xff; | |
159 | m->r_up = m->g_up = m->b_up = true; | |
160 | ||
161 | r = sd_event_default(&m->event); | |
162 | if (r < 0) | |
163 | return r; | |
164 | ||
165 | r = sd_bus_open_system(&m->bus); | |
166 | if (r < 0) | |
167 | return r; | |
168 | ||
169 | r = sd_bus_attach_event(m->bus, m->event, SD_EVENT_PRIORITY_NORMAL); | |
170 | if (r < 0) | |
171 | return r; | |
172 | ||
86f210e9 | 173 | r = sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, -1); |
5eef597e MP |
174 | if (r < 0) |
175 | return r; | |
176 | ||
177 | r = sd_event_add_signal(m->event, NULL, SIGTERM, NULL, NULL); | |
178 | if (r < 0) | |
179 | return r; | |
180 | ||
181 | r = sd_event_add_signal(m->event, NULL, SIGINT, NULL, NULL); | |
182 | if (r < 0) | |
183 | return r; | |
184 | ||
185 | r = sd_event_add_exit(m->event, &m->exit_src, modeset_exit_fn, m); | |
186 | if (r < 0) | |
187 | return r; | |
188 | ||
189 | /* schedule before sd-bus close */ | |
190 | r = sd_event_source_set_priority(m->exit_src, -10); | |
191 | if (r < 0) | |
192 | return r; | |
193 | ||
194 | r = sysview_context_new(&m->sysview, | |
195 | SYSVIEW_CONTEXT_SCAN_LOGIND | | |
196 | SYSVIEW_CONTEXT_SCAN_DRM, | |
197 | m->event, | |
198 | m->bus, | |
199 | NULL); | |
200 | if (r < 0) | |
201 | return r; | |
202 | ||
203 | r = grdev_context_new(&m->grdev, m->event, m->bus); | |
204 | if (r < 0) | |
205 | return r; | |
206 | ||
207 | *out = m; | |
208 | m = NULL; | |
209 | return 0; | |
210 | } | |
211 | ||
212 | static uint8_t next_color(bool *up, uint8_t cur, unsigned int mod) { | |
213 | uint8_t next; | |
214 | ||
215 | /* generate smoothly morphing colors */ | |
216 | ||
217 | next = cur + (*up ? 1 : -1) * (rand() % mod); | |
218 | if ((*up && next < cur) || (!*up && next > cur)) { | |
219 | *up = !*up; | |
220 | next = cur; | |
221 | } | |
222 | ||
223 | return next; | |
224 | } | |
225 | ||
226 | static void modeset_draw(Modeset *m, const grdev_display_target *t) { | |
227 | uint32_t j, k, *b; | |
228 | uint8_t *l; | |
229 | ||
230 | assert(t->back->format == DRM_FORMAT_XRGB8888 || t->back->format == DRM_FORMAT_ARGB8888); | |
231 | assert(!t->rotate); | |
232 | assert(!t->flip); | |
233 | ||
234 | l = t->back->maps[0]; | |
235 | for (j = 0; j < t->height; ++j) { | |
236 | for (k = 0; k < t->width; ++k) { | |
237 | b = (uint32_t*)l; | |
238 | b[k] = (0xff << 24) | (m->r << 16) | (m->g << 8) | m->b; | |
239 | } | |
240 | ||
241 | l += t->back->strides[0]; | |
242 | } | |
243 | } | |
244 | ||
245 | static void modeset_render(Modeset *m, grdev_display *d) { | |
246 | const grdev_display_target *t; | |
247 | ||
248 | m->r = next_color(&m->r_up, m->r, 4); | |
249 | m->g = next_color(&m->g_up, m->g, 3); | |
250 | m->b = next_color(&m->b_up, m->b, 2); | |
251 | ||
252 | GRDEV_DISPLAY_FOREACH_TARGET(d, t) { | |
253 | modeset_draw(m, t); | |
254 | grdev_display_flip_target(d, t); | |
255 | } | |
256 | ||
257 | grdev_session_commit(m->grdev_session); | |
258 | } | |
259 | ||
260 | static void modeset_grdev_fn(grdev_session *session, void *userdata, grdev_event *ev) { | |
261 | Modeset *m = userdata; | |
262 | ||
263 | switch (ev->type) { | |
264 | case GRDEV_EVENT_DISPLAY_ADD: | |
265 | grdev_display_enable(ev->display_add.display); | |
266 | break; | |
267 | case GRDEV_EVENT_DISPLAY_REMOVE: | |
268 | break; | |
269 | case GRDEV_EVENT_DISPLAY_CHANGE: | |
270 | break; | |
271 | case GRDEV_EVENT_DISPLAY_FRAME: | |
272 | modeset_render(m, ev->display_frame.display); | |
273 | break; | |
274 | } | |
275 | } | |
276 | ||
277 | static int modeset_sysview_fn(sysview_context *c, void *userdata, sysview_event *ev) { | |
278 | unsigned int flags, type; | |
279 | Modeset *m = userdata; | |
280 | sysview_device *d; | |
281 | const char *name; | |
282 | int r; | |
283 | ||
284 | switch (ev->type) { | |
285 | case SYSVIEW_EVENT_SESSION_FILTER: | |
286 | if (streq_ptr(m->session, ev->session_filter.id)) | |
287 | return 1; | |
288 | ||
289 | break; | |
290 | case SYSVIEW_EVENT_SESSION_ADD: | |
291 | assert(!m->grdev_session); | |
292 | ||
293 | name = sysview_session_get_name(ev->session_add.session); | |
294 | flags = 0; | |
295 | ||
296 | if (m->managed) | |
297 | flags |= GRDEV_SESSION_MANAGED; | |
298 | ||
299 | r = grdev_session_new(&m->grdev_session, | |
300 | m->grdev, | |
301 | flags, | |
302 | name, | |
303 | modeset_grdev_fn, | |
304 | m); | |
f47781d8 MP |
305 | if (r < 0) |
306 | return log_error_errno(r, "Cannot create grdev session: %m"); | |
5eef597e MP |
307 | |
308 | if (m->managed) { | |
309 | r = sysview_session_take_control(ev->session_add.session); | |
f47781d8 MP |
310 | if (r < 0) |
311 | return log_error_errno(r, "Cannot request session control: %m"); | |
5eef597e MP |
312 | } |
313 | ||
314 | grdev_session_enable(m->grdev_session); | |
315 | ||
316 | break; | |
317 | case SYSVIEW_EVENT_SESSION_REMOVE: | |
318 | if (!m->grdev_session) | |
319 | return 0; | |
320 | ||
321 | grdev_session_restore(m->grdev_session); | |
322 | grdev_session_disable(m->grdev_session); | |
323 | m->grdev_session = grdev_session_free(m->grdev_session); | |
324 | if (sd_event_get_exit_code(m->event, &r) == -ENODATA) | |
325 | sd_event_exit(m->event, 0); | |
326 | break; | |
327 | case SYSVIEW_EVENT_SESSION_ATTACH: | |
328 | d = ev->session_attach.device; | |
329 | type = sysview_device_get_type(d); | |
330 | if (type == SYSVIEW_DEVICE_DRM) | |
331 | grdev_session_add_drm(m->grdev_session, sysview_device_get_ud(d)); | |
332 | ||
333 | break; | |
334 | case SYSVIEW_EVENT_SESSION_DETACH: | |
335 | d = ev->session_detach.device; | |
336 | type = sysview_device_get_type(d); | |
337 | if (type == SYSVIEW_DEVICE_DRM) | |
338 | grdev_session_remove_drm(m->grdev_session, sysview_device_get_ud(d)); | |
339 | ||
340 | break; | |
341 | case SYSVIEW_EVENT_SESSION_REFRESH: | |
342 | d = ev->session_refresh.device; | |
343 | type = sysview_device_get_type(d); | |
344 | if (type == SYSVIEW_DEVICE_DRM) | |
345 | grdev_session_hotplug_drm(m->grdev_session, ev->session_refresh.ud); | |
346 | ||
347 | break; | |
348 | case SYSVIEW_EVENT_SESSION_CONTROL: | |
349 | r = ev->session_control.error; | |
f47781d8 MP |
350 | if (r < 0) |
351 | return log_error_errno(r, "Cannot acquire session control: %m"); | |
5eef597e MP |
352 | |
353 | r = ioctl(1, KDSKBMODE, K_UNICODE); | |
f47781d8 MP |
354 | if (r < 0) |
355 | return log_error_errno(errno, "Cannot set K_UNICODE on stdout: %m"); | |
5eef597e MP |
356 | |
357 | break; | |
358 | } | |
359 | ||
360 | return 0; | |
361 | } | |
362 | ||
363 | static int modeset_run(Modeset *m) { | |
364 | struct termios in_attr, saved_attr; | |
365 | int r; | |
366 | ||
367 | assert(m); | |
368 | ||
369 | if (!m->my_tty) { | |
370 | log_warning("You need to run this program on a free VT"); | |
371 | return -EACCES; | |
372 | } | |
373 | ||
374 | if (!m->managed && geteuid() > 0) | |
375 | log_warning("You run in unmanaged mode without being root. This is likely to fail.."); | |
376 | ||
377 | printf("modeset - Show test pattern on selected graphics devices\n" | |
378 | " Running on seat '%s' in user-session '%s'\n" | |
379 | " Exit by pressing ^C\n\n", | |
380 | m->seat ? : "seat0", m->session ? : "<none>"); | |
381 | ||
382 | r = sysview_context_start(m->sysview, modeset_sysview_fn, m); | |
383 | if (r < 0) | |
384 | goto out; | |
385 | ||
386 | r = tcgetattr(0, &in_attr); | |
387 | if (r < 0) { | |
388 | r = -errno; | |
389 | goto out; | |
390 | } | |
391 | ||
392 | saved_attr = in_attr; | |
393 | in_attr.c_lflag &= ~ECHO; | |
394 | ||
395 | r = tcsetattr(0, TCSANOW, &in_attr); | |
396 | if (r < 0) { | |
397 | r = -errno; | |
398 | goto out; | |
399 | } | |
400 | ||
401 | r = sd_event_loop(m->event); | |
402 | tcsetattr(0, TCSANOW, &saved_attr); | |
403 | printf("exiting..\n"); | |
404 | ||
405 | out: | |
406 | sysview_context_stop(m->sysview); | |
407 | return r; | |
408 | } | |
409 | ||
410 | static int help(void) { | |
411 | printf("%s [OPTIONS...]\n\n" | |
412 | "Show test pattern on all selected graphics devices.\n\n" | |
413 | " -h --help Show this help\n" | |
414 | " --version Show package version\n" | |
415 | , program_invocation_short_name); | |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
420 | static int parse_argv(int argc, char *argv[]) { | |
421 | enum { | |
422 | ARG_VERSION = 0x100, | |
423 | }; | |
424 | static const struct option options[] = { | |
425 | { "help", no_argument, NULL, 'h' }, | |
426 | { "version", no_argument, NULL, ARG_VERSION }, | |
427 | {}, | |
428 | }; | |
429 | int c; | |
430 | ||
431 | assert(argc >= 0); | |
432 | assert(argv); | |
433 | ||
434 | while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) | |
435 | switch (c) { | |
436 | case 'h': | |
437 | help(); | |
438 | return 0; | |
439 | ||
440 | case ARG_VERSION: | |
441 | puts(PACKAGE_STRING); | |
442 | puts(SYSTEMD_FEATURES); | |
443 | return 0; | |
444 | ||
445 | case '?': | |
446 | return -EINVAL; | |
447 | ||
448 | default: | |
449 | assert_not_reached("Unhandled option"); | |
450 | } | |
451 | ||
452 | if (argc > optind) { | |
453 | log_error("Too many arguments"); | |
454 | return -EINVAL; | |
455 | } | |
456 | ||
457 | return 1; | |
458 | } | |
459 | ||
460 | int main(int argc, char *argv[]) { | |
461 | _cleanup_(modeset_freep) Modeset *m = NULL; | |
462 | int r; | |
463 | ||
464 | log_set_target(LOG_TARGET_AUTO); | |
465 | log_parse_environment(); | |
466 | log_open(); | |
467 | ||
f47781d8 | 468 | initialize_srand(); |
5eef597e MP |
469 | |
470 | r = parse_argv(argc, argv); | |
471 | if (r <= 0) | |
472 | goto finish; | |
473 | ||
474 | r = modeset_new(&m); | |
475 | if (r < 0) | |
476 | goto finish; | |
477 | ||
478 | r = modeset_run(m); | |
479 | ||
480 | finish: | |
481 | return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; | |
482 | } |