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1/* sendfile -- copy data directly from one file descriptor to another
2 Copyright (C) 1998-2018 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 <http://www.gnu.org/licenses/>. */
18
19#ifndef _SYS_SENDFILE_H
20#define _SYS_SENDFILE_H 1
21
22#include <features.h>
23#include <sys/types.h>
24
25__BEGIN_DECLS
26
27/* Send up to COUNT bytes from file associated with IN_FD starting at
28 *OFFSET to descriptor OUT_FD. Set *OFFSET to the IN_FD's file position
29 following the read bytes. If OFFSET is a null pointer, use the normal
30 file position instead. Return the number of written bytes, or -1 in
31 case of error. */
32#ifndef __USE_FILE_OFFSET64
33extern ssize_t sendfile (int __out_fd, int __in_fd, off_t *__offset,
34 size_t __count) __THROW;
35#else
36# ifdef __REDIRECT_NTH
37extern ssize_t __REDIRECT_NTH (sendfile,
38 (int __out_fd, int __in_fd, __off64_t *__offset,
39 size_t __count), sendfile64);
40# else
41# define sendfile sendfile64
42# endif
43#endif
44#ifdef __USE_LARGEFILE64
45extern ssize_t sendfile64 (int __out_fd, int __in_fd, __off64_t *__offset,
46 size_t __count) __THROW;
47#endif
48
49__END_DECLS
50
51#endif /* sys/sendfile.h */
52

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