From 1cfdceba98c380ad1cebb3a6b3d1f141d852c691 Mon Sep 17 00:00:00 2001
From: Richard Braun <rbraun@sceen.net>
Date: Mon, 14 Oct 2013 20:48:25 +0200
Subject: term: fix read on a closed PTY

* term/ptyio.c (pty_io_read): Return EIO if the terminal has been closed.
---
 term/ptyio.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/term/ptyio.c b/term/ptyio.c
index 44a215bb..2da7d6c8 100644
--- a/term/ptyio.c
+++ b/term/ptyio.c
@@ -331,6 +331,12 @@ pty_io_read (struct trivfs_protid *cred,
 	}
     }
 
+  if (!(termflags & TTY_OPEN))
+    {
+      pthread_mutex_unlock (&global_lock);
+      return EIO;
+    }
+
   if (control_byte)
     {
       size = 1;
-- 
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