From 309d211cdee3c5661a0a6e1941979fe4501ed624 Mon Sep 17 00:00:00 2001
From: nick black <dankamongmen@gmail.com>
Date: Sun, 13 Jun 2021 16:42:26 -0400
Subject: [PATCH] termdesc: only bounce back to cbreak if fd >= 0 #1469

---
 src/lib/termdesc.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/src/lib/termdesc.c b/src/lib/termdesc.c
index c5d2e653f..203dfbd01 100644
--- a/src/lib/termdesc.c
+++ b/src/lib/termdesc.c
@@ -398,7 +398,7 @@ int interrogate_terminfo(tinfo* ti, int fd, const char* termname, unsigned utf8,
     }
   }
   if(ncinputlayer_init(ti, stdin)){
-    return -1;
+    goto err;
   }
   // our current sixel quantization algorithm requires at least 64 color
   // registers. we make use of no more than 256.
@@ -406,11 +406,15 @@ int interrogate_terminfo(tinfo* ti, int fd, const char* termname, unsigned utf8,
     setup_sixel_bitmaps(ti);
   }
   if(!nocbreak){
-    if(tcsetattr(fd, TCSANOW, &ti->tpreserved)){
-      return -1;
+    if(fd >= 0){
+      if(tcsetattr(fd, TCSANOW, &ti->tpreserved)){
+        ncinputlayer_stop(&ti->input);
+        goto err;
+      }
     }
   }
   if(apply_term_heuristics(ti, termname, fd)){
+    ncinputlayer_stop(&ti->input);
     goto err;
   }
   return 0;