//TerminalHandler
TerminalHandler::TerminalHandler(Compositor& comp)
{
const char* number = getenv("XDG_VTNR");
if(!number)
{
throw std::runtime_error("tty::tty: XDG_VTNR not set");
return;
}
number_ = std::stoi(number);
//open tty
std::string ttyString = "/dev/tty" + std::to_string(number_);
tty_ = open(ttyString.c_str(), O_RDWR | O_NOCTTY | O_CLOEXEC);
if(tty_ < 0)
{
throw std::runtime_error("TerminalHandler::TerminalHandler: couldnt open " + ttyString);
return;
}
int fd = tty_;
//save current
vt_stat state;
if(ioctl(fd, VT_GETSTATE, &state) == -1)
{
throw std::runtime_error("could not get current tty");
return;
}
//set it up
if(ioctl(tty_, VT_ACTIVATE, number_) == -1 || ioctl(tty_, VT_WAITACTIVE, number_) == -1)
{
throw std::runtime_error("Could not activate tty");
return;
}
focus_ = 1;
/*
if (ioctl(fd, KDSKBMUTE, 1) == -1 && ioctl(fd, KDSKBMODE, K_OFF) == -1)
{
throw std::runtime_error("failed to set tty keyboard mode");
return;
}
if(ioctl(fd, KDSETMODE, KD_GRAPHICS) == -1)
{
throw std::runtime_error("Could not set tty to graphics mode");
return;
}
*/
vt_mode mode;
mode.mode = VT_PROCESS;
mode.acqsig = SIGUSR1;
mode.relsig = SIGUSR2;
if(ioctl(fd, VT_SETMODE, &mode) == -1)
{
throw std::runtime_error("Could not set vt_mode");
return;
}
wl_event_loop_add_signal(&comp.wlEventLoop(), SIGUSR1, ttySignalhandler, this);
wl_event_loop_add_signal(&comp.wlEventLoop(), SIGUSR2, ttySignalhandler, this);
}
WL_EXPORT int
module_init(struct weston_compositor *compositor,
int *argc, char *argv[])
{
struct wl_display *display = compositor->wl_display;
struct weston_xserver *wxs;
char lockfile[256], display_name[8];
wxs = zalloc(sizeof *wxs);
if (wxs == NULL)
return -1;
wxs->process.cleanup = weston_xserver_cleanup;
wxs->wl_display = display;
wxs->compositor = compositor;
wxs->display = 0;
retry:
if (create_lockfile(wxs->display, lockfile, sizeof lockfile) < 0) {
if (errno == EAGAIN) {
goto retry;
} else if (errno == EEXIST) {
wxs->display++;
goto retry;
} else {
free(wxs);
return -1;
}
}
wxs->abstract_fd = bind_to_abstract_socket(wxs->display);
if (wxs->abstract_fd < 0 && errno == EADDRINUSE) {
wxs->display++;
unlink(lockfile);
goto retry;
}
wxs->unix_fd = bind_to_unix_socket(wxs->display);
if (wxs->unix_fd < 0) {
unlink(lockfile);
close(wxs->abstract_fd);
free(wxs);
return -1;
}
snprintf(display_name, sizeof display_name, ":%d", wxs->display);
weston_log("xserver listening on display %s\n", display_name);
setenv("DISPLAY", display_name, 1);
wxs->loop = wl_display_get_event_loop(display);
wxs->abstract_source =
wl_event_loop_add_fd(wxs->loop, wxs->abstract_fd,
WL_EVENT_READABLE,
weston_xserver_handle_event, wxs);
wxs->unix_source =
wl_event_loop_add_fd(wxs->loop, wxs->unix_fd,
WL_EVENT_READABLE,
weston_xserver_handle_event, wxs);
wxs->sigusr1_source = wl_event_loop_add_signal(wxs->loop, SIGUSR1,
handle_sigusr1, wxs);
wxs->destroy_listener.notify = weston_xserver_destroy;
wl_signal_add(&compositor->destroy_signal, &wxs->destroy_listener);
return 0;
}
struct tty *
tty_create(struct weston_compositor *compositor, tty_vt_func_t vt_func,
int tty_nr)
{
struct termios raw_attributes;
struct vt_mode mode = { 0 };
int ret;
struct tty *tty;
struct wl_event_loop *loop;
struct stat buf;
char filename[16];
struct vt_stat vts;
tty = malloc(sizeof *tty);
if (tty == NULL)
return NULL;
memset(tty, 0, sizeof *tty);
tty->compositor = compositor;
tty->vt_func = vt_func;
tty->fd = weston_environment_get_fd("WESTON_TTY_FD");
if (tty->fd < 0)
tty->fd = STDIN_FILENO;
if (tty_nr > 0) {
snprintf(filename, sizeof filename, "/dev/tty%d", tty_nr);
fprintf(stderr, "compositor: using %s\n", filename);
tty->fd = open(filename, O_RDWR | O_NOCTTY | O_CLOEXEC);
tty->vt = tty_nr;
} else if (fstat(tty->fd, &buf) == 0 &&
major(buf.st_rdev) == TTY_MAJOR &&
minor(buf.st_rdev) > 0) {
if (tty->fd == STDIN_FILENO)
tty->fd = fcntl(STDIN_FILENO, F_DUPFD_CLOEXEC, 0);
tty->vt = minor(buf.st_rdev);
} else {
/* Fall back to try opening a new VT. This typically
* requires root. */
tty->fd = try_open_vt(tty);
}
if (tty->fd <= 0) {
fprintf(stderr, "failed to open tty: %m\n");
free(tty);
return NULL;
}
if (ioctl(tty->fd, VT_GETSTATE, &vts) == 0)
tty->starting_vt = vts.v_active;
else
tty->starting_vt = tty->vt;
if (tty->starting_vt != tty->vt) {
if (ioctl(tty->fd, VT_ACTIVATE, tty->vt) < 0 ||
ioctl(tty->fd, VT_WAITACTIVE, tty->vt) < 0) {
fprintf(stderr, "failed to swtich to new vt\n");
return NULL;
}
}
if (tcgetattr(tty->fd, &tty->terminal_attributes) < 0) {
fprintf(stderr, "could not get terminal attributes: %m\n");
goto err;
}
/* Ignore control characters and disable echo */
raw_attributes = tty->terminal_attributes;
cfmakeraw(&raw_attributes);
/* Fix up line endings to be normal (cfmakeraw hoses them) */
raw_attributes.c_oflag |= OPOST | OCRNL;
if (tcsetattr(tty->fd, TCSANOW, &raw_attributes) < 0)
fprintf(stderr, "could not put terminal into raw mode: %m\n");
ioctl(tty->fd, KDGKBMODE, &tty->kb_mode);
ret = ioctl(tty->fd, KDSKBMODE, K_OFF);
if (ret) {
fprintf(stderr, "failed to set K_OFF keyboard mode on tty: %m\n");
goto err_attr;
}
ret = ioctl(tty->fd, KDSETMODE, KD_GRAPHICS);
if (ret) {
fprintf(stderr, "failed to set KD_GRAPHICS mode on tty: %m\n");
goto err_kdkbmode;
}
tty->has_vt = 1;
mode.mode = VT_PROCESS;
mode.relsig = SIGUSR1;
mode.acqsig = SIGUSR1;
if (ioctl(tty->fd, VT_SETMODE, &mode) < 0) {
fprintf(stderr, "failed to take control of vt handling\n");
goto err_kdmode;
}
loop = wl_display_get_event_loop(compositor->wl_display);
tty->vt_source =
wl_event_loop_add_signal(loop, SIGUSR1, vt_handler, tty);
if (!tty->vt_source)
goto err_vtmode;
return tty;
err_vtmode:
ioctl(tty->fd, VT_SETMODE, &mode);
err_kdmode:
ioctl(tty->fd, KDSETMODE, KD_TEXT);
err_kdkbmode:
ioctl(tty->fd, KDSKBMODE, tty->kb_mode);
err_attr:
tcsetattr(tty->fd, TCSANOW, &tty->terminal_attributes);
err:
close(tty->fd);
free(tty);
return NULL;
}
static int
setup_tty(struct launcher_direct *launcher, int tty)
{
struct wl_event_loop *loop;
struct vt_mode mode = { 0 };
struct stat buf;
char tty_device[32] ="<stdin>";
int ret, kd_mode;
if (tty == 0) {
launcher->tty = dup(tty);
if (launcher->tty == -1) {
weston_log("couldn't dup stdin: %m\n");
return -1;
}
} else {
snprintf(tty_device, sizeof tty_device, "/dev/tty%d", tty);
launcher->tty = open(tty_device, O_RDWR | O_CLOEXEC);
if (launcher->tty == -1) {
weston_log("couldn't open tty %s: %m\n", tty_device);
return -1;
}
}
if (fstat(launcher->tty, &buf) == -1 ||
major(buf.st_rdev) != TTY_MAJOR || minor(buf.st_rdev) == 0) {
weston_log("%s not a vt\n", tty_device);
weston_log("if running weston from ssh, "
"use --tty to specify a tty\n");
goto err_close;
}
ret = ioctl(launcher->tty, KDGETMODE, &kd_mode);
if (ret) {
weston_log("failed to get VT mode: %m\n");
return -1;
}
if (kd_mode != KD_TEXT) {
weston_log("%s is already in graphics mode, "
"is another display server running?\n", tty_device);
goto err_close;
}
ioctl(launcher->tty, VT_ACTIVATE, minor(buf.st_rdev));
ioctl(launcher->tty, VT_WAITACTIVE, minor(buf.st_rdev));
if (ioctl(launcher->tty, KDGKBMODE, &launcher->kb_mode)) {
weston_log("failed to read keyboard mode: %m\n");
goto err_close;
}
if (ioctl(launcher->tty, KDSKBMUTE, 1) &&
ioctl(launcher->tty, KDSKBMODE, K_OFF)) {
weston_log("failed to set K_OFF keyboard mode: %m\n");
goto err_close;
}
ret = ioctl(launcher->tty, KDSETMODE, KD_GRAPHICS);
if (ret) {
weston_log("failed to set KD_GRAPHICS mode on tty: %m\n");
goto err_close;
}
/*
* SIGRTMIN is used as global VT-acquire+release signal. Note that
* SIGRT* must be tested on runtime, as their exact values are not
* known at compile-time. POSIX requires 32 of them to be available.
*/
if (SIGRTMIN > SIGRTMAX) {
weston_log("not enough RT signals available: %u-%u\n",
SIGRTMIN, SIGRTMAX);
ret = -EINVAL;
goto err_close;
}
mode.mode = VT_PROCESS;
mode.relsig = SIGRTMIN;
mode.acqsig = SIGRTMIN;
if (ioctl(launcher->tty, VT_SETMODE, &mode) < 0) {
weston_log("failed to take control of vt handling\n");
goto err_close;
}
loop = wl_display_get_event_loop(launcher->compositor->wl_display);
launcher->vt_source =
wl_event_loop_add_signal(loop, SIGRTMIN, vt_handler, launcher);
if (!launcher->vt_source)
goto err_close;
return 0;
err_close:
close(launcher->tty);
return -1;
}
