From 5b22c9d8a93762b4b1e2a5682008092f88a8abc1 Mon Sep 17 00:00:00 2001
From: Daniel Silverstone <dsilvers@digital-scurf.org>
Date: Sun, 5 Aug 2012 11:44:55 +0100
Subject: COMMS: if read() fails, propagate the error

---
 lib/supple/comms.lua | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/supple/comms.lua b/lib/supple/comms.lua
index ef44666..e72f8f1 100644
--- a/lib/supple/comms.lua
+++ b/lib/supple/comms.lua
@@ -38,7 +38,10 @@ local function send_msg(msg)
 end
 
 local function recv_msg()
-   local len = luxio.read(fd, 5)
+   local len, errno = luxio.read(fd, 5)
+   if type(len) ~= "string" then
+      error(luxio.strerror(errno))
+   end
    if #len < 5 then
       error("Unable to read 5 byte length")
    end
-- 
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