Move verify_vc_kbmode() to terminal-util.c as vt_verify_kbmode()

src/basic/terminal-util.c

@@ -1249,6 +1249,23 @@ int vt_default_utf8(void) {
         return parse_boolean(b);
 }
 
+int vt_verify_kbmode(int fd) {
+        int curr_mode;
+
+        /*
+         * Make sure we only adjust consoles in K_XLATE or K_UNICODE mode.
+         * Otherwise we would (likely) interfere with X11's processing of the
+         * key events.
+         *
+         * http://lists.freedesktop.org/archives/systemd-devel/2013-February/008573.html
+         */
+
+        if (ioctl(fd, KDGKBMODE, &curr_mode) < 0)
+                return -errno;
+
+        return IN_SET(curr_mode, K_XLATE, K_UNICODE) ? 0 : -EBUSY;
+}
+
 int vt_reset_keyboard(int fd) {
         int kb;