1/* Generic version of preadv2.
2 Copyright (C) 2017-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <unistd.h>
21#include <sys/uio.h>
22
23#ifndef __OFF_T_MATCHES_OFF64_T
24
25/* Since we define no flags for preadv2 just route to preadv. */
26ssize_t
27preadv2 (int fd, const struct iovec *vector, int count, off_t offset,
28 int flags)
29{
30 if (flags != 0)
31 {
32 __set_errno (ENOTSUP);
33 return -1;
34 }
35
36 if (offset == -1)
37 return __readv (fd, vector, count);
38 else
39 return preadv (fd, vector, count, offset);
40}
41
42#endif
43

source code of glibc/sysdeps/posix/preadv2.c