From af69591e6233c83ed749b2f51922edb45bdaef2e Mon Sep 17 00:00:00 2001
From: Drew DeVault <sir@cmpwn.com>
Date: Fri, 9 Jun 2017 11:38:38 -0400
Subject: [PATCH] Add error handling and init in backend_autocreate

---
 backend/CMakeLists.txt         |  2 ++
 backend/backend.c              |  8 ++++++--
 backend/libinput/backend.c     |  5 +++++
 example/rotation.c             |  1 +
 include/wlr/backend/libinput.h | 12 ++++++++++++
 5 files changed, 26 insertions(+), 2 deletions(-)
 create mode 100644 include/wlr/backend/libinput.h

diff --git a/backend/CMakeLists.txt b/backend/CMakeLists.txt
index bca615fb..c3e7ef54 100644
--- a/backend/CMakeLists.txt
+++ b/backend/CMakeLists.txt
@@ -2,6 +2,7 @@ include_directories(
 	${PROTOCOLS_INCLUDE_DIRS}
 	${WAYLAND_INCLUDE_DIR}
 	${DRM_INCLUDE_DIRS}
+    ${LIBINPUT_INCLUDE_DIRS}
 )
 
 add_library(wlr-backend
@@ -30,5 +31,6 @@ target_link_libraries(wlr-backend
     ${EGL_LIBRARIES}
     ${SYSTEMD_LIBRARIES}
     ${UDEV_LIBRARIES}
+    ${LIBINPUT_LIBRARIES}
     ${GBM_LIBRARIES}
 )
diff --git a/backend/backend.c b/backend/backend.c
index 38b65dca..1a0c3295 100644
--- a/backend/backend.c
+++ b/backend/backend.c
@@ -5,8 +5,10 @@
 #include <errno.h>
 #include <wlr/session.h>
 #include <wlr/backend/interface.h>
+#include <wlr/backend/drm.h>
+#include <wlr/backend/libinput.h>
+#include "backend/udev.h"
 #include "common/log.h"
-#include "backend/drm.h"
 
 struct wlr_backend *wlr_backend_create(const struct wlr_backend_impl *impl,
 		struct wlr_backend_state *state) {
@@ -46,12 +48,14 @@ struct wlr_backend *wlr_backend_autocreate(struct wl_display *display,
 		wlr_log(L_ERROR, "Failed to start udev");
 		goto error;
 	}
+	struct wlr_backend *wlr;
+	wlr = wlr_libinput_backend_create(display, session, udev);
+	return wlr;
 	int gpu = wlr_udev_find_gpu(udev, session);
 	if (gpu == -1) {
 		wlr_log(L_ERROR, "Failed to open DRM device");
 		goto error_udev;
 	}
-	struct wlr_backend *wlr;
 	wlr = wlr_drm_backend_create(display, session, udev, gpu);
 	if (!wlr) {
 		goto error_gpu;
diff --git a/backend/libinput/backend.c b/backend/libinput/backend.c
index 6142bde3..b49bf6b4 100644
--- a/backend/libinput/backend.c
+++ b/backend/libinput/backend.c
@@ -34,14 +34,17 @@ static void wlr_libinput_log(struct libinput *libinput,
 }
 
 static bool wlr_libinput_backend_init(struct wlr_backend_state *state) {
+	wlr_log(L_DEBUG, "Initializing libinput");
 	state->handle = libinput_udev_create_context(&libinput_impl, state,
 			state->udev->udev);
 	if (!state->handle) {
+		wlr_log(L_ERROR, "Failed to create libinput context");
 		return false;
 	}
 
 	// TODO: Let user customize seat used
 	if (!libinput_udev_assign_seat(state->handle, "seat0")) {
+		wlr_log(L_ERROR, "Failed to assign libinput seat");
 		return false;
 	}
 
@@ -58,8 +61,10 @@ static bool wlr_libinput_backend_init(struct wlr_backend_state *state) {
 			libinput_get_fd(state->handle), WL_EVENT_READABLE,
 			wlr_libinput_handle_event, state);
 	if (!state->input_event) {
+		wlr_log(L_ERROR, "Failed to create input event on event loop");
 		return false;
 	}
+	wlr_log(L_DEBUG, "libinput sucessfully initialized");
 	return true;
 }
 
diff --git a/example/rotation.c b/example/rotation.c
index 25755f5f..12778f8e 100644
--- a/example/rotation.c
+++ b/example/rotation.c
@@ -219,6 +219,7 @@ int main(int argc, char *argv[]) {
 	wl_signal_add(&wlr->events.output_remove, &state.output_remove);
 
 	if (!wlr_backend_init(wlr)) {
+		printf("Failed to initialize backend, bailing out\n");
 		return 1;
 	}
 
diff --git a/include/wlr/backend/libinput.h b/include/wlr/backend/libinput.h
new file mode 100644
index 00000000..1e8c3555
--- /dev/null
+++ b/include/wlr/backend/libinput.h
@@ -0,0 +1,12 @@
+#ifndef WLR_BACKEND_LIBINPUT_H
+#define WLR_BACKEND_LIBINPUT_H
+
+#include <wayland-server.h>
+#include <wlr/session.h>
+#include <wlr/backend.h>
+#include <wlr/backend/udev.h>
+
+struct wlr_backend *wlr_libinput_backend_create(struct wl_display *display,
+		struct wlr_session *session, struct wlr_udev *udev);
+
+#endif