From a70c8cb2046646cca8654d59e2510634984b9c10 Mon Sep 17 00:00:00 2001
From: Joe Bryan <joemfb@gmail.com>
Date: Sat, 7 Nov 2020 21:08:34 -0800
Subject: [PATCH] vere: print error and exit if stdin is not a tty

---
 pkg/urbit/vere/io/term.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkg/urbit/vere/io/term.c b/pkg/urbit/vere/io/term.c
index 273092682..937ccf156 100644
--- a/pkg/urbit/vere/io/term.c
+++ b/pkg/urbit/vere/io/term.c
@@ -147,6 +147,12 @@ u3_term_log_init(void)
     {
       uty_u->fid_i = 0;                       //  stdin, yes we write to it...
 
+      if ( !isatty(uty_u->fid_i) ) {
+        fprintf(stderr, "vere: unable to initialize terminal (not a tty)\r\n"
+                        "      use -t to disable interactivity\r\n");
+        u3_king_bail();
+      }
+
       uv_pipe_init(u3L, &(uty_u->pop_u), 0);
       uv_pipe_open(&(uty_u->pop_u), uty_u->fid_i);
     }