As preadv and pwritev accept off_t type the prototypes should be declared
as follows
extern ssize_t preadv (int __fd, const struct iovec *__iovec, int __count,
off_t __offset) __wur;
extern ssize_t pwritev (int __fd, const struct iovec *__iovec, int __count,
off_t __offset) __wur;
to take into account _FILE_OFFSET_BITS=64 define.
I am not sure but probably it is better to redeclare these prototypes
by analogy with sendfile using __REDIRECT_NTH.
From 12347ece4b48c81a1db80eec660fc7ec7c542c19 Mon Sep 17 00:00:00 2001
From: Vlad Starodubtsev <v.starodubt...@ndmsystems.com>
Date: Thu, 26 Oct 2017 17:22:33 +0300
Subject: [PATCH] Fix prototypes for preadv pwritev.
---
include/sys/uio.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/sys/uio.h b/include/sys/uio.h
index 78341ed40..aa766f9b1 100644
--- a/include/sys/uio.h
+++ b/include/sys/uio.h
@@ -59,7 +59,7 @@ extern ssize_t writev (int __fd, const struct iovec *__iovec, int __count);
This function is a cancellation point and therefore not marked with
__THROW. */
extern ssize_t preadv (int __fd, const struct iovec *__iovec, int __count,
- __off_t __offset) __wur;
+ off_t __offset) __wur;
/* Write data pointed by the buffers described by IOVEC, which is a
vector of COUNT 'struct iovec's, to file descriptor FD at the given
@@ -71,7 +71,7 @@ extern ssize_t preadv (int __fd, const struct iovec *__iovec, int __count,
This function is a cancellation point and therefore not marked with
__THROW. */
extern ssize_t pwritev (int __fd, const struct iovec *__iovec, int __count,
- __off_t __offset) __wur;
+ off_t __offset) __wur;
#endif /* Use misc. */
__END_DECLS
--
2.17.1
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