From 8fd7c837f7691c07272412cf1492bff02d0d7548 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Wed, 27 May 2020 18:23:35 +0200
Subject: [PATCH] render: resize: don't try to signal TIOCSWINSZ on a closed
 ptmx FD

---
 render.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/render.c b/render.c
index cf2bdaa4..46bb459c 100644
--- a/render.c
+++ b/render.c
@@ -1844,7 +1844,7 @@ maybe_resize(struct terminal *term, int width, int height, bool force)
             term->margins.left, term->margins.right, term->margins.top, term->margins.bottom);
 
     /* Signal TIOCSWINSZ */
-    if (ioctl(term->ptmx, TIOCSWINSZ,
+    if (term->ptmx >= 0 && ioctl(term->ptmx, TIOCSWINSZ,
               &(struct winsize){
                   .ws_row = term->rows,
                   .ws_col = term->cols,