From 5dcb22addb1cee76d44f14b652a3a9577d774ab6 Mon Sep 17 00:00:00 2001
From: "zhang.zezhu" <zhang.zezhu@zte.com.cn>
Date: Tue, 5 Jul 2016 04:08:25 +0000
Subject: [PATCH] src/common/buffer.cc fix judgment for lseek

Signed-off-by: zhang.zezhu <zhang.zezhu@zte.com.cn>
---
 src/common/buffer.cc | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/common/buffer.cc b/src/common/buffer.cc
index 785a210fb96..f941428ec84 100644
--- a/src/common/buffer.cc
+++ b/src/common/buffer.cc
@@ -2293,9 +2293,9 @@ int buffer::list::write_fd_zero_copy(int fd) const
    */
   int64_t offset = ::lseek(fd, 0, SEEK_CUR);
   int64_t *off_p = &offset;
-  if (offset < 0 && offset != ESPIPE)
-    return (int) offset;
-  if (offset == ESPIPE)
+  if (offset < 0 && errno != ESPIPE)
+    return -errno;
+  if (errno == ESPIPE)
     off_p = NULL;
   for (std::list<ptr>::const_iterator it = _buffers.begin();
        it != _buffers.end(); ++it) {
-- 
2.47.3