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/* sendfile -- copy data directly from one file descriptor to another
Copyright (C) 1998-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#ifndef _SYS_SENDFILE_H
#define _SYS_SENDFILE_H 1
#include <features.h>
#include <sys/types.h>
__BEGIN_DECLS
/* Send up to COUNT bytes from file associated with IN_FD starting at
*OFFSET to descriptor OUT_FD. Set *OFFSET to the IN_FD's file position
following the read bytes. If OFFSET is a null pointer, use the normal
file position instead. Return the number of written bytes, or -1 in
case of error. */
#ifndef __USE_FILE_OFFSET64
extern ssize_t sendfile (int __out_fd, int __in_fd, off_t *__offset,
size_t __count) __THROW;
#else
# ifdef __REDIRECT_NTH
extern ssize_t __REDIRECT_NTH (sendfile,
(int __out_fd, int __in_fd, __off64_t *__offset,
size_t __count), sendfile64);
# else
# define sendfile sendfile64
# endif
#endif
#ifdef __USE_LARGEFILE64
extern ssize_t sendfile64 (int __out_fd, int __in_fd, __off64_t *__offset,
size_t __count) __THROW;
#endif
__END_DECLS
#endif /* sys/sendfile.h */
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