compositor: choose tty from command line

This is a backend option, so you should use something like '-otty='.

Signed-off-by: Tiago Vignatti <tiago.vignatti@intel.com>

compositor/compositor-drm.c

@@ -779,7 +779,7 @@ static const char default_seat[] = "seat0";
 
 static struct wlsc_compositor *
 drm_compositor_create(struct wl_display *display,
-		      int connector, const char *seat)
+		      int connector, const char *seat, int tty)
 {
 	struct drm_compositor *ec;
 	struct udev_enumerate *e;
@@ -856,7 +856,7 @@ drm_compositor_create(struct wl_display *display,
 	ec->drm_source =
 		wl_event_loop_add_fd(loop, ec->drm.fd,
 				     WL_EVENT_READABLE, on_drm_input, ec);
-	ec->tty = tty_create(&ec->base, vt_func);
+	ec->tty = tty_create(&ec->base, vt_func, tty);
 
 	ec->udev_monitor = udev_monitor_new_from_netlink(ec->udev, "udev");
 	if (ec->udev_monitor == NULL) {
@@ -887,8 +887,9 @@ backend_init(struct wl_display *display, char *options)
 	int connector = 0, i;
 	const char *seat;
 	char *p, *value;
+	int tty = 1;
 
-	static char * const tokens[] = { "connector", "seat", NULL };
+	static char * const tokens[] = { "connector", "seat", "tty", NULL };
 
 	p = options;
 	seat = default_seat;
@@ -900,8 +901,11 @@ backend_init(struct wl_display *display, char *options)
 		case 1:
 			seat = value;
 			break;
+		case 2:
+			tty = strtol(value, NULL, 0);
+			break;
 		}
 	}
 
-	return drm_compositor_create(display, connector, seat);
+	return drm_compositor_create(display, connector, seat, tty);
 }

compositor/compositor-openwfd.c

@@ -594,7 +594,7 @@ static const char default_seat[] = "seat0";
 
 static struct wlsc_compositor *
 wfd_compositor_create(struct wl_display *display,
-		      int connector, const char *seat)
+		      int connector, const char *seat, int tty)
 {
 	struct wfd_compositor *ec;
 	struct wl_event_loop *loop;
@@ -655,7 +655,7 @@ wfd_compositor_create(struct wl_display *display,
 		wl_event_loop_add_fd(loop,
 				     wfdDeviceEventGetFD(ec->dev, ec->event),
 				     WL_EVENT_READABLE, on_wfd_event, ec);
-	ec->tty = tty_create(&ec->base, vt_func);
+	ec->tty = tty_create(&ec->base, vt_func, tty);
 
 	return &ec->base;
 }
@@ -669,8 +669,9 @@ backend_init(struct wl_display *display, char *options)
 	int connector = 0, i;
 	const char *seat;
 	char *p, *value;
+	int tty = 1;
 
-	static char * const tokens[] = { "connector", "seat", NULL };
+	static char * const tokens[] = { "connector", "seat", "tty", NULL };
 	
 	p = options;
 	seat = default_seat;
@@ -682,8 +683,11 @@ backend_init(struct wl_display *display, char *options)
 		case 1:
 			seat = value;
 			break;
+		case 2:
+			tty = value;
+			break;
 		}
 	}
 
-	return wfd_compositor_create(display, connector, seat);
+	return wfd_compositor_create(display, connector, seat, tty);
 }

compositor/compositor.h

@@ -388,7 +388,8 @@ enum {
 typedef void (*tty_vt_func_t)(struct wlsc_compositor *compositor, int event);
 
 struct tty *
-tty_create(struct wlsc_compositor *compositor, tty_vt_func_t vt_func);
+tty_create(struct wlsc_compositor *compositor, tty_vt_func_t vt_func,
+	   int tty_nr);
 
 void
 tty_destroy(struct tty *tty);

compositor/tty.c

@@ -89,22 +89,27 @@ on_tty_input(int fd, uint32_t mask, void *data)
 }
 
 struct tty *
-tty_create(struct wlsc_compositor *compositor, tty_vt_func_t vt_func)
+tty_create(struct wlsc_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;
+	char filename[16];
 
 	tty = malloc(sizeof *tty);
 	if (tty == NULL)
 		return NULL;
 
+	snprintf(filename, sizeof filename, "/dev/tty%d", tty_nr);
+	fprintf(stderr, "compositor: using %s\n", filename);
+
 	memset(tty, 0, sizeof *tty);
 	tty->compositor = compositor;
 	tty->vt_func = vt_func;
-	tty->fd = open("/dev/tty", O_RDWR | O_NOCTTY);
+	tty->fd = open(filename, O_RDWR | O_NOCTTY);
 	if (tty->fd <= 0) {
 		fprintf(stderr, "failed to open active tty: %m\n");
 		return NULL;