wg_send_buffer: return error if fd < 0

CID 116310

diff --git a/src/write_graphite.c b/src/write_graphite.c
index 3dc4df4..0f9a8be 100644 (file)
--- a/src/write_graphite.c
+++ b/src/write_graphite.c
@@ -137,6 +137,9 @@ static int wg_send_buffer (struct wg_callback *cb)
 {
     ssize_t status;
 
+    if (cb->sock_fd < 0)
+        return (-1);
+
     status = swrite (cb->sock_fd, cb->send_buf, strlen (cb->send_buf));
     if (status != 0)
     {