readline_common.c.diff

diff --git a/sdk/system/readline/readline_common.c b/sdk/system/readline/readline_common.c
index d427b8d..a7c3b96 100644
--- a/sdk/system/readline/readline_common.c
+++ b/sdk/system/readline/readline_common.c
@@ -732,5 +732,11 @@ ssize_t readline_common(FAR struct rl_common_s *vtbl, FAR char *buf, int buflen)
           tab_completion(vtbl, buf, buflen, &nch);
         }
 #endif
+     else if (ch == 0x04) /* Ctrl-D */
+        {
+          buf[0] = '\0';
+          RL_PUTC(vtbl, '\n');
+          return 0;
+        }
     }
 }