From 39c8a90a91211d047fa3c267814e17d5c10cc83c Mon Sep 17 00:00:00 2001
From: Ben Noordhuis <info@bnoordhuis.nl>
Date: Mon, 25 Feb 2013 03:22:10 +0100
Subject: [PATCH] unix: set errno in sendfile emulation

The sendfile emulation in src/unix/fs.c polls the file descriptor for
write readiness. If POLLERR or POLLHUP is set, it bails out but doesn't
set errno (hence it doesn't report a useful error code). Rectify that.

Fixes #620.
---
 src/unix/fs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/unix/fs.c b/src/unix/fs.c
index f9181df1..53f46ce7 100644
--- a/src/unix/fs.c
+++ b/src/unix/fs.c
@@ -374,6 +374,7 @@ static ssize_t uv__fs_sendfile_emul(uv_fs_t* req) {
       while (n == -1 && errno == EINTR);
 
       if (n == -1 || (pfd.revents & ~POLLOUT) != 0) {
+        errno = EIO;
         nsent = -1;
         goto out;
       }