struct weston_launcher * weston_launcher_connect(struct weston_compositor *compositor, int tty, const char *seat_id) { struct weston_launcher *launcher; struct wl_event_loop *loop; int r; launcher = malloc(sizeof *launcher); if (launcher == NULL) return NULL; launcher->logind = NULL; launcher->compositor = compositor; launcher->drm_fd = -1; launcher->fd = weston_environment_get_fd("WESTON_LAUNCHER_SOCK"); if (launcher->fd != -1) { launcher->tty = weston_environment_get_fd("WESTON_TTY_FD"); /* We don't get a chance to read out the original kb * mode for the tty, so just hard code K_UNICODE here * in case we have to clean if weston-launch dies. */ launcher->kb_mode = K_UNICODE; loop = wl_display_get_event_loop(compositor->wl_display); launcher->source = wl_event_loop_add_fd(loop, launcher->fd, WL_EVENT_READABLE, weston_launcher_data, launcher); if (launcher->source == NULL) { free(launcher); return NULL; } } else { r = weston_logind_connect(&launcher->logind, compositor, seat_id, tty); if (r < 0) { launcher->logind = NULL; if (geteuid() == 0) { if (setup_tty(launcher, tty) == -1) { free(launcher); return NULL; } } else { free(launcher); return NULL; } } } return launcher; }
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; }