2 * Copyright © 2010 Intel Corporation
4 * Permission to use, copy, modify, distribute, and sell this software and
5 * its documentation for any purpose is hereby granted without fee, provided
6 * that the above copyright notice appear in all copies and that both that
7 * copyright notice and this permission notice appear in supporting
8 * documentation, and that the name of the copyright holders not be used in
9 * advertising or publicity pertaining to distribution of the software
10 * without specific, written prior permission. The copyright holders make
11 * no representations about the suitability of this software for any
12 * purpose. It is provided "as is" without express or implied warranty.
14 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS
15 * SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND
16 * FITNESS, IN NO EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY
17 * SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
18 * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF
19 * CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
20 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
32 #include <linux/major.h>
33 #include <sys/ioctl.h>
35 #include "compositor.h"
38 struct weston_compositor *compositor;
40 struct termios terminal_attributes;
42 struct wl_event_source *input_source;
43 struct wl_event_source *vt_source;
44 tty_vt_func_t vt_func;
45 int vt, starting_vt, has_vt;
48 static int vt_handler(int signal_number, void *data)
50 struct tty *tty = data;
53 tty->vt_func(tty->compositor, TTY_LEAVE_VT);
56 ioctl(tty->fd, VT_RELDISP, 1);
58 ioctl(tty->fd, VT_RELDISP, VT_ACKACQ);
60 tty->vt_func(tty->compositor, TTY_ENTER_VT);
68 on_tty_input(int fd, uint32_t mask, void *data)
70 struct tty *tty = data;
72 /* Ignore input to tty. We get keyboard events from evdev
74 tcflush(tty->fd, TCIFLUSH);
80 try_open_vt(struct tty *tty)
85 tty0 = open("/dev/tty0", O_WRONLY | O_CLOEXEC);
87 fprintf(stderr, "could not open tty0: %m\n");
91 if (ioctl(tty0, VT_OPENQRY, &tty->vt) < 0 || tty->vt == -1) {
92 fprintf(stderr, "could not open tty0: %m\n");
98 snprintf(filename, sizeof filename, "/dev/tty%d", tty->vt);
99 fprintf(stderr, "compositor: using new vt %s\n", filename);
100 fd = open(filename, O_RDWR | O_NOCTTY | O_CLOEXEC);
108 tty_create(struct weston_compositor *compositor, tty_vt_func_t vt_func,
111 struct termios raw_attributes;
112 struct vt_mode mode = { 0 };
115 struct wl_event_loop *loop;
120 tty = malloc(sizeof *tty);
124 memset(tty, 0, sizeof *tty);
125 tty->compositor = compositor;
126 tty->vt_func = vt_func;
128 tty->fd = weston_environment_get_fd("WESTON_TTY_FD");
130 tty->fd = STDIN_FILENO;
133 snprintf(filename, sizeof filename, "/dev/tty%d", tty_nr);
134 fprintf(stderr, "compositor: using %s\n", filename);
135 tty->fd = open(filename, O_RDWR | O_NOCTTY | O_CLOEXEC);
137 } else if (fstat(tty->fd, &buf) == 0 &&
138 major(buf.st_rdev) == TTY_MAJOR &&
139 minor(buf.st_rdev) > 0) {
140 if (tty->fd == STDIN_FILENO)
141 tty->fd = fcntl(STDIN_FILENO, F_DUPFD_CLOEXEC, 0);
142 tty->vt = minor(buf.st_rdev);
144 /* Fall back to try opening a new VT. This typically
146 tty->fd = try_open_vt(tty);
150 fprintf(stderr, "failed to open tty: %m\n");
155 if (ioctl(tty->fd, VT_GETSTATE, &vts) == 0)
156 tty->starting_vt = vts.v_active;
158 tty->starting_vt = tty->vt;
160 if (tty->starting_vt != tty->vt) {
161 if (ioctl(tty->fd, VT_ACTIVATE, tty->vt) < 0 ||
162 ioctl(tty->fd, VT_WAITACTIVE, tty->vt) < 0) {
163 fprintf(stderr, "failed to swtich to new vt\n");
168 if (tcgetattr(tty->fd, &tty->terminal_attributes) < 0) {
169 fprintf(stderr, "could not get terminal attributes: %m\n");
173 /* Ignore control characters and disable echo */
174 raw_attributes = tty->terminal_attributes;
175 cfmakeraw(&raw_attributes);
177 /* Fix up line endings to be normal (cfmakeraw hoses them) */
178 raw_attributes.c_oflag |= OPOST | OCRNL;
180 if (tcsetattr(tty->fd, TCSANOW, &raw_attributes) < 0)
181 fprintf(stderr, "could not put terminal into raw mode: %m\n");
183 loop = wl_display_get_event_loop(compositor->wl_display);
185 wl_event_loop_add_fd(loop, tty->fd,
186 WL_EVENT_READABLE, on_tty_input, tty);
187 if (!tty->input_source)
190 ret = ioctl(tty->fd, KDSETMODE, KD_GRAPHICS);
192 fprintf(stderr, "failed to set KD_GRAPHICS mode on tty: %m\n");
193 goto err_input_source;
197 mode.mode = VT_PROCESS;
198 mode.relsig = SIGUSR1;
199 mode.acqsig = SIGUSR1;
200 if (ioctl(tty->fd, VT_SETMODE, &mode) < 0) {
201 fprintf(stderr, "failed to take control of vt handling\n");
206 wl_event_loop_add_signal(loop, SIGUSR1, vt_handler, tty);
213 ioctl(tty->fd, VT_SETMODE, &mode);
216 ioctl(tty->fd, KDSETMODE, KD_TEXT);
219 wl_event_source_remove(tty->input_source);
222 tcsetattr(tty->fd, TCSANOW, &tty->terminal_attributes);
231 tty_destroy(struct tty *tty)
233 struct vt_mode mode = { 0 };
238 if (ioctl(tty->fd, KDSETMODE, KD_TEXT))
240 "failed to set KD_TEXT mode on tty: %m\n");
242 if (tcsetattr(tty->fd, TCSANOW, &tty->terminal_attributes) < 0)
244 "could not restore terminal to canonical mode\n");
247 if (ioctl(tty->fd, VT_SETMODE, &mode) < 0)
248 fprintf(stderr, "could not reset vt handling\n");
250 if (tty->has_vt && tty->vt != tty->starting_vt) {
251 ioctl(tty->fd, VT_ACTIVATE, tty->starting_vt);
252 ioctl(tty->fd, VT_WAITACTIVE, tty->starting_vt);
255 wl_event_source_remove(tty->input_source);
256 wl_event_source_remove(tty->vt_source);