1 /*
2 * Copyright © 2012 Benjamin Franzke
3 * Copyright © 2013 Intel Corporation
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining
6 * a copy of this software and associated documentation files (the
7 * "Software"), to deal in the Software without restriction, including
8 * without limitation the rights to use, copy, modify, merge, publish,
9 * distribute, sublicense, and/or sell copies of the Software, and to
10 * permit persons to whom the Software is furnished to do so, subject to
11 * the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the
14 * next paragraph) shall be included in all copies or substantial
15 * portions of the Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
20 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
21 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
22 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
23 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 */
26
27 #include "config.h"
28
29 #include <libweston/libweston.h>
30
31 #include <errno.h>
32 #include <fcntl.h>
33 #include <unistd.h>
34 #include <signal.h>
35 #include <string.h>
36 #include <sys/stat.h>
37 #include <sys/ioctl.h>
38 #include <linux/vt.h>
39 #include <linux/kd.h>
40 #include <linux/major.h>
41
42 #include "launcher-impl.h"
43
44 #define DRM_MAJOR 226
45
46 #ifndef KDSKBMUTE
47 #define KDSKBMUTE 0x4B51
48 #endif
49
50 /* major()/minor() */
51 #ifdef MAJOR_IN_MKDEV
52 #include <sys/mkdev.h>
53 #endif
54 #ifdef MAJOR_IN_SYSMACROS
55 #include <sys/sysmacros.h>
56 #endif
57
58 #ifdef BUILD_DRM_COMPOSITOR
59
60 #include <xf86drm.h>
61
62 static inline int
is_drm_master(int drm_fd)63 is_drm_master(int drm_fd)
64 {
65 drm_magic_t magic;
66
67 return drmGetMagic(drm_fd, &magic) == 0 &&
68 drmAuthMagic(drm_fd, magic) == 0;
69 }
70
71 #else
72
73 static inline int
drmDropMaster(int drm_fd)74 drmDropMaster(int drm_fd)
75 {
76 return 0;
77 }
78
79 static inline int
drmSetMaster(int drm_fd)80 drmSetMaster(int drm_fd)
81 {
82 return 0;
83 }
84
85 static inline int
is_drm_master(int drm_fd)86 is_drm_master(int drm_fd)
87 {
88 return 0;
89 }
90
91 #endif
92
93 struct launcher_direct {
94 struct weston_launcher base;
95 struct weston_compositor *compositor;
96 int kb_mode, tty, drm_fd;
97 struct wl_event_source *vt_source;
98 };
99
100 static int
vt_handler(int signal_number,void * data)101 vt_handler(int signal_number, void *data)
102 {
103 struct launcher_direct *launcher = data;
104 struct weston_compositor *compositor = launcher->compositor;
105
106 if (compositor->session_active) {
107 compositor->session_active = false;
108 wl_signal_emit(&compositor->session_signal, compositor);
109 drmDropMaster(launcher->drm_fd);
110 ioctl(launcher->tty, VT_RELDISP, 1);
111 } else {
112 ioctl(launcher->tty, VT_RELDISP, VT_ACKACQ);
113 drmSetMaster(launcher->drm_fd);
114 compositor->session_active = true;
115 wl_signal_emit(&compositor->session_signal, compositor);
116 }
117
118 return 1;
119 }
120
121 static int
setup_tty(struct launcher_direct * launcher,int tty)122 setup_tty(struct launcher_direct *launcher, int tty)
123 {
124 struct wl_event_loop *loop;
125 struct vt_mode mode = { 0 };
126 struct stat buf;
127 char tty_device[32] ="<stdin>";
128 int ret, kd_mode;
129
130 if (tty == 0) {
131 launcher->tty = dup(tty);
132 if (launcher->tty == -1) {
133 weston_log("couldn't dup stdin: %s\n",
134 strerror(errno));
135 return -1;
136 }
137 } else {
138 snprintf(tty_device, sizeof tty_device, "/dev/tty%d", tty);
139 launcher->tty = open(tty_device, O_RDWR | O_CLOEXEC);
140 if (launcher->tty == -1) {
141 weston_log("couldn't open tty %s: %s\n", tty_device,
142 strerror(errno));
143 return -1;
144 }
145 }
146
147 if (fstat(launcher->tty, &buf) == -1 ||
148 major(buf.st_rdev) != TTY_MAJOR || minor(buf.st_rdev) == 0) {
149 weston_log("%s not a vt\n", tty_device);
150 weston_log("if running weston from ssh, "
151 "use --tty to specify a tty\n");
152 goto err_close;
153 }
154
155 ret = ioctl(launcher->tty, KDGETMODE, &kd_mode);
156 if (ret) {
157 weston_log("failed to get VT mode: %s\n", strerror(errno));
158 return -1;
159 }
160 if (kd_mode != KD_TEXT) {
161 weston_log("%s is already in graphics mode, "
162 "is another display server running?\n", tty_device);
163 }
164
165 ioctl(launcher->tty, VT_ACTIVATE, minor(buf.st_rdev));
166 ioctl(launcher->tty, VT_WAITACTIVE, minor(buf.st_rdev));
167
168 if (ioctl(launcher->tty, KDGKBMODE, &launcher->kb_mode)) {
169 weston_log("failed to read keyboard mode: %s\n",
170 strerror(errno));
171 goto err_close;
172 }
173
174 if (ioctl(launcher->tty, KDSKBMUTE, 1) &&
175 ioctl(launcher->tty, KDSKBMODE, K_OFF)) {
176 weston_log("failed to set K_OFF keyboard mode: %s\n",
177 strerror(errno));
178 goto err_close;
179 }
180
181 ret = ioctl(launcher->tty, KDSETMODE, KD_GRAPHICS);
182 if (ret) {
183 weston_log("failed to set KD_GRAPHICS mode on tty: %s\n",
184 strerror(errno));
185 goto err_close;
186 }
187
188 /*
189 * SIGRTMIN is used as global VT-acquire+release signal. Note that
190 * SIGRT* must be tested on runtime, as their exact values are not
191 * known at compile-time. POSIX requires 32 of them to be available.
192 */
193 if (SIGRTMIN > SIGRTMAX) {
194 weston_log("not enough RT signals available: %u-%u\n",
195 SIGRTMIN, SIGRTMAX);
196 ret = -EINVAL;
197 goto err_close;
198 }
199
200 mode.mode = VT_PROCESS;
201 mode.relsig = SIGRTMIN;
202 mode.acqsig = SIGRTMIN;
203 if (ioctl(launcher->tty, VT_SETMODE, &mode) < 0) {
204 weston_log("failed to take control of vt handling\n");
205 goto err_close;
206 }
207
208 loop = wl_display_get_event_loop(launcher->compositor->wl_display);
209 launcher->vt_source =
210 wl_event_loop_add_signal(loop, SIGRTMIN, vt_handler, launcher);
211 if (!launcher->vt_source)
212 goto err_close;
213
214 return 0;
215
216 err_close:
217 close(launcher->tty);
218 return -1;
219 }
220
221 static int
launcher_direct_open(struct weston_launcher * launcher_base,const char * path,int flags)222 launcher_direct_open(struct weston_launcher *launcher_base, const char *path, int flags)
223 {
224 struct launcher_direct *launcher = wl_container_of(launcher_base, launcher, base);
225 struct stat s;
226 int fd;
227
228 fd = open(path, flags | O_CLOEXEC);
229 if (fd == -1)
230 return -1;
231
232 if (fstat(fd, &s) == -1) {
233 close(fd);
234 return -1;
235 }
236 // OHOS
237 weston_log("launcher_direct_open %s\n", path);
238
239 if (major(s.st_rdev) == DRM_MAJOR) {
240 launcher->drm_fd = fd;
241 // OHOS
242 // if (!is_drm_master(fd)) {
243 // weston_log("drm fd not master %s\n", path);
244 // close(fd);
245 // return -1;
246 // }
247 }
248
249 return fd;
250 }
251
252 static void
launcher_direct_close(struct weston_launcher * launcher_base,int fd)253 launcher_direct_close(struct weston_launcher *launcher_base, int fd)
254 {
255 close(fd);
256 }
257
258 static void
launcher_direct_restore(struct weston_launcher * launcher_base)259 launcher_direct_restore(struct weston_launcher *launcher_base)
260 {
261 struct launcher_direct *launcher = wl_container_of(launcher_base, launcher, base);
262 struct vt_mode mode = { 0 };
263
264 if (ioctl(launcher->tty, KDSKBMUTE, 0) &&
265 ioctl(launcher->tty, KDSKBMODE, launcher->kb_mode))
266 weston_log("failed to restore kb mode: %s\n",
267 strerror(errno));
268
269 if (ioctl(launcher->tty, KDSETMODE, KD_TEXT))
270 weston_log("failed to set KD_TEXT mode on tty: %s\n",
271 strerror(errno));
272
273 /* We have to drop master before we switch the VT back in
274 * VT_AUTO, so we don't risk switching to a VT with another
275 * display server, that will then fail to set drm master. */
276 drmDropMaster(launcher->drm_fd);
277
278 mode.mode = VT_AUTO;
279 if (ioctl(launcher->tty, VT_SETMODE, &mode) < 0)
280 weston_log("could not reset vt handling\n");
281 }
282
283 static int
launcher_direct_activate_vt(struct weston_launcher * launcher_base,int vt)284 launcher_direct_activate_vt(struct weston_launcher *launcher_base, int vt)
285 {
286 struct launcher_direct *launcher = wl_container_of(launcher_base, launcher, base);
287 return ioctl(launcher->tty, VT_ACTIVATE, vt);
288 }
289
290 static int
launcher_direct_connect(struct weston_launcher ** out,struct weston_compositor * compositor,int tty,const char * seat_id,bool sync_drm)291 launcher_direct_connect(struct weston_launcher **out, struct weston_compositor *compositor,
292 int tty, const char *seat_id, bool sync_drm)
293 {
294 struct launcher_direct *launcher;
295
296 if (geteuid() != 0)
297 return -EINVAL;
298
299 launcher = zalloc(sizeof(*launcher));
300 if (launcher == NULL)
301 return -ENOMEM;
302
303 launcher->base.iface = &launcher_direct_iface;
304 launcher->compositor = compositor;
305
306 if (strcmp("seat0", seat_id) == 0) {
307 if (setup_tty(launcher, tty) == -1) {
308 free(launcher);
309 return -1;
310 }
311 } else {
312 launcher->tty = -1;
313 }
314
315 * (struct launcher_direct **) out = launcher;
316 return 0;
317 }
318
319 static void
launcher_direct_destroy(struct weston_launcher * launcher_base)320 launcher_direct_destroy(struct weston_launcher *launcher_base)
321 {
322 struct launcher_direct *launcher = wl_container_of(launcher_base, launcher, base);
323
324 if (launcher->tty >= 0) {
325 launcher_direct_restore(&launcher->base);
326 wl_event_source_remove(launcher->vt_source);
327 close(launcher->tty);
328 }
329
330 free(launcher);
331 }
332
333 static int
launcher_direct_get_vt(struct weston_launcher * base)334 launcher_direct_get_vt(struct weston_launcher *base)
335 {
336 struct launcher_direct *launcher = wl_container_of(base, launcher, base);
337 struct stat s;
338 if (fstat(launcher->tty, &s) < 0)
339 return -1;
340
341 return minor(s.st_rdev);
342 }
343
344 const struct launcher_interface launcher_direct_iface = {
345 .connect = launcher_direct_connect,
346 .destroy = launcher_direct_destroy,
347 .open = launcher_direct_open,
348 .close = launcher_direct_close,
349 .activate_vt = launcher_direct_activate_vt,
350 .get_vt = launcher_direct_get_vt,
351 };
352