From b3f1bda4fc4015d1fef9e6ba07e5340b7b41308c Mon Sep 17 00:00:00 2001
From: Jesse Luehrs <doy@tozt.net>
Date: Mon, 5 Mar 2012 02:19:59 -0600
Subject: this doesn't really make sense if stdin/stdout aren't attached to a
 tty

---
 lib/Term/Filter.pm | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Term/Filter.pm b/lib/Term/Filter.pm
index 9969895..9172fc2 100644
--- a/lib/Term/Filter.pm
+++ b/lib/Term/Filter.pm
@@ -149,6 +149,9 @@ sub _setup {
     my $self = shift;
     my (@cmd) = @_;
 
+    Carp::croak("Must be run attached to a tty")
+        unless -t $self->input && -t $self->output;
+
     $self->pty->spawn(@cmd) || Carp::croak("Couldn't spawn @cmd: $!");
 
     $self->_raw_mode(1);
-- 
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