From b77c0474a265c53ecce19ab895309f5df6e943bf Mon Sep 17 00:00:00 2001
From: James Elford <james.p.elford@gmail.com>
Date: Sat, 1 Apr 2017 19:20:09 +0100
Subject: [PATCH] Better error message when not running in a tty

-t returns true if the provided file descriptor is open and refers
to a terminal.
---
 rustup-init.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rustup-init.sh b/rustup-init.sh
index 8aaf3d0720..764f16245d 100755
--- a/rustup-init.sh
+++ b/rustup-init.sh
@@ -114,8 +114,8 @@ main() {
         # reading stdin.  This script was piped into `sh` though and
         # doesn't have stdin to pass to its children. Instead we're going
         # to explicitly connect /dev/tty to the installer's stdin.
-        if [ ! -e "/dev/tty" ]; then
-            err "/dev/tty does not exist"
+        if [ ! -t 1 ]; then
+            err "Unable to run interactively. Run with -y to accept defaults, --help for additional options"
         fi
 
         run "$_file" "$@" < /dev/tty