From 2a45a2fc06fc3574bd0e45117afa7eef95316b9b Mon Sep 17 00:00:00 2001
From: Denton Gentry <dgentry@google.com>
Date: Thu, 1 Oct 2015 23:27:09 -0700
Subject: [PATCH] Use readv/writev instead of preadv/pwritev.

All calls to preadv and pwritev specified an offset of zero,
making them equivalent to readv/writev.

Older versions of uclibc lack preadv/pwritev. Eliminating them
makes platform support easier.
---
 src/util.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/util.c b/src/util.c
index 6bb279c..19a79d7 100644
--- a/src/util.c
+++ b/src/util.c
@@ -290,7 +290,7 @@ int file_write(int fd, void *buf, size_t sz)
 	ssize_t ret;
 	iov[0].iov_base = buf;
 	iov[0].iov_len = sz;
-	ret = IGNORE_EINTR (pwritev (fd, iov, 1, 0));
+	ret = IGNORE_EINTR (writev (fd, iov, 1));
 	if (ret != sz)
 	{
 		return -1;
@@ -332,7 +332,7 @@ int file_read(int fd, void *buf, size_t sz)
 	struct iovec iov[1];
 	iov[0].iov_base = buf;
 	iov[0].iov_len = sz;
-	if (preadv (fd, iov, 1, 0) != sz)
+	if (readv (fd, iov, 1) != sz)
 	{
 		/* Returns -1 on read failure */
 		return -1;
-- 
2.6.0.rc2.230.g3dd15c0