weston-launch: Print explanation of why we failed to open the device

diff --git a/src/weston-launch.c b/src/weston-launch.c
index 89c3c5a..42b2506 100644 (file)
--- a/src/weston-launch.c
+++ b/src/weston-launch.c
@@ -320,12 +320,17 @@ handle_open(struct weston_launch *wl, struct msghdr *msg, ssize_t len)
                goto err0;
 
        fd = open(message->path, message->flags);
-       if (fd < 0)
+       if (fd < 0) {
+               fprintf(stderr, "Error opening device %s: %m\n",
+                       message->path);
                goto err0;
+       }
 
        if (major(s.st_rdev) != INPUT_MAJOR) {
                close(fd);
                fd = -1;
+               fprintf(stderr, "Device %s is not an input device\n",
+                       message->path);
                goto err0;
        }