patch 8.0.0096
Problem: When the input or output is not a tty Vim appears to hang.
Solution: Add the --ttyfail argument. Also add the "ttyin" and "ttyout"
features to be able to check in Vim script.
diff --git a/src/structs.h b/src/structs.h
index c749a36..1b73e37 100644
--- a/src/structs.h
+++ b/src/structs.h
@@ -3225,8 +3225,8 @@
#endif
int want_full_screen;
- int stdout_isatty; /* is stdout a terminal? */
int not_a_term; /* no warning for missing term? */
+ int tty_fail; /* exit if not a tty */
char_u *term; /* specified terminal name */
#ifdef FEAT_CRYPT
int ask_for_key; /* -x argument */