lib/vagrant/action/builtin/ssh_run.rb in vagrant-unbundled-1.9.5.1 vs lib/vagrant/action/builtin/ssh_run.rb in vagrant-unbundled-1.9.7.1

@@ -42,10 +42,12 @@
           opts = env[:ssh_opts] || {}
           opts[:extra_args] ||= []
 
           # Allow the user to specify a tty or non-tty manually, but if they
           # don't then we default to a TTY
-          if !opts[:extra_args].include?("-t") && !opts[:extra_args].include?("-T")
+          if !opts[:extra_args].include?("-t") &&
+              !opts[:extra_args].include?("-T") &&
+              env[:tty]
             opts[:extra_args] << "-t"
           end
 
           opts[:extra_args] << command
           opts[:subprocess] = true