1/* Copyright (C) 2009-2022 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
8
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
13
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, see
16 <https://www.gnu.org/licenses/>. */
17
18#include <sys/uio.h>
19#include <sysdep-cancel.h>
20
21#ifndef __OFF_T_MATCHES_OFF64_T
22
23# ifdef __ASSUME_PREADV
24
25ssize_t
26preadv (int fd, const struct iovec *vector, int count, off_t offset)
27{
28 return SYSCALL_CANCEL (preadv, fd, vector, count, LO_HI_LONG (offset));
29}
30# else
31static ssize_t __atomic_preadv_replacement (int, const struct iovec *,
32 int, off_t);
33ssize_t
34preadv (int fd, const struct iovec *vector, int count, off_t offset)
35{
36 ssize_t result = SYSCALL_CANCEL (preadv, fd, vector, count,
37 LO_HI_LONG (offset));
38 if (result >= 0 || errno != ENOSYS)
39 return result;
40 return __atomic_preadv_replacement (fd, vector, count, offset);
41}
42# define PREADV static __atomic_preadv_replacement
43# define PREAD __pread
44# define OFF_T off_t
45# include <sysdeps/posix/preadv_common.c>
46# endif /* __ASSUME_PREADV */
47
48libc_hidden_def (preadv)
49#endif
50

source code of glibc/sysdeps/unix/sysv/linux/preadv.c