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 *vt_source;
43 tty_vt_func_t vt_func;
44 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 try_open_vt(struct tty *tty)
73 tty0 = open("/dev/tty0", O_WRONLY | O_CLOEXEC);
75 fprintf(stderr, "could not open tty0: %m\n");
79 if (ioctl(tty0, VT_OPENQRY, &tty->vt) < 0 || tty->vt == -1) {
80 fprintf(stderr, "could not open tty0: %m\n");
86 snprintf(filename, sizeof filename, "/dev/tty%d", tty->vt);
87 fprintf(stderr, "compositor: using new vt %s\n", filename);
88 fd = open(filename, O_RDWR | O_NOCTTY | O_CLOEXEC);
96 tty_activate_vt(struct tty *tty, int vt)
98 return ioctl(tty->fd, VT_ACTIVATE, vt);
102 tty_create(struct weston_compositor *compositor, tty_vt_func_t vt_func,
105 struct termios raw_attributes;
106 struct vt_mode mode = { 0 };
109 struct wl_event_loop *loop;
114 tty = malloc(sizeof *tty);
118 memset(tty, 0, sizeof *tty);
119 tty->compositor = compositor;
120 tty->vt_func = vt_func;
122 tty->fd = weston_environment_get_fd("WESTON_TTY_FD");
124 tty->fd = STDIN_FILENO;
127 snprintf(filename, sizeof filename, "/dev/tty%d", tty_nr);
128 fprintf(stderr, "compositor: using %s\n", filename);
129 tty->fd = open(filename, O_RDWR | O_NOCTTY | O_CLOEXEC);
131 } else if (fstat(tty->fd, &buf) == 0 &&
132 major(buf.st_rdev) == TTY_MAJOR &&
133 minor(buf.st_rdev) > 0) {
134 if (tty->fd == STDIN_FILENO)
135 tty->fd = fcntl(STDIN_FILENO, F_DUPFD_CLOEXEC, 0);
136 tty->vt = minor(buf.st_rdev);
138 /* Fall back to try opening a new VT. This typically
140 tty->fd = try_open_vt(tty);
144 fprintf(stderr, "failed to open tty: %m\n");
149 if (ioctl(tty->fd, VT_GETSTATE, &vts) == 0)
150 tty->starting_vt = vts.v_active;
152 tty->starting_vt = tty->vt;
154 if (tty->starting_vt != tty->vt) {
155 if (ioctl(tty->fd, VT_ACTIVATE, tty->vt) < 0 ||
156 ioctl(tty->fd, VT_WAITACTIVE, tty->vt) < 0) {
157 fprintf(stderr, "failed to swtich to new vt\n");
162 if (tcgetattr(tty->fd, &tty->terminal_attributes) < 0) {
163 fprintf(stderr, "could not get terminal attributes: %m\n");
167 /* Ignore control characters and disable echo */
168 raw_attributes = tty->terminal_attributes;
169 cfmakeraw(&raw_attributes);
171 /* Fix up line endings to be normal (cfmakeraw hoses them) */
172 raw_attributes.c_oflag |= OPOST | OCRNL;
174 if (tcsetattr(tty->fd, TCSANOW, &raw_attributes) < 0)
175 fprintf(stderr, "could not put terminal into raw mode: %m\n");
177 ioctl(tty->fd, KDGKBMODE, &tty->kb_mode);
178 ret = ioctl(tty->fd, KDSKBMODE, K_OFF);
180 fprintf(stderr, "failed to set K_OFF keyboard mode on tty: %m\n");
184 ret = ioctl(tty->fd, KDSETMODE, KD_GRAPHICS);
186 fprintf(stderr, "failed to set KD_GRAPHICS mode on tty: %m\n");
191 mode.mode = VT_PROCESS;
192 mode.relsig = SIGUSR1;
193 mode.acqsig = SIGUSR1;
194 if (ioctl(tty->fd, VT_SETMODE, &mode) < 0) {
195 fprintf(stderr, "failed to take control of vt handling\n");
199 loop = wl_display_get_event_loop(compositor->wl_display);
201 wl_event_loop_add_signal(loop, SIGUSR1, vt_handler, tty);
208 ioctl(tty->fd, VT_SETMODE, &mode);
211 ioctl(tty->fd, KDSETMODE, KD_TEXT);
214 ioctl(tty->fd, KDSKBMODE, tty->kb_mode);
217 tcsetattr(tty->fd, TCSANOW, &tty->terminal_attributes);
226 tty_destroy(struct tty *tty)
228 struct vt_mode mode = { 0 };
233 if (ioctl(tty->fd, KDSKBMODE, tty->kb_mode))
234 fprintf(stderr, "failed to restore keyboard mode: %m\n");
236 if (ioctl(tty->fd, KDSETMODE, KD_TEXT))
238 "failed to set KD_TEXT mode on tty: %m\n");
240 if (tcsetattr(tty->fd, TCSANOW, &tty->terminal_attributes) < 0)
242 "could not restore terminal to canonical mode\n");
245 if (ioctl(tty->fd, VT_SETMODE, &mode) < 0)
246 fprintf(stderr, "could not reset vt handling\n");
248 if (tty->has_vt && tty->vt != tty->starting_vt) {
249 ioctl(tty->fd, VT_ACTIVATE, tty->starting_vt);
250 ioctl(tty->fd, VT_WAITACTIVE, tty->starting_vt);
253 wl_event_source_remove(tty->vt_source);