1/* sendfile -- copy data directly from one file descriptor to another 2 Copyright (C) 1998,99,01,2002,2004 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, write to the Free 17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 18 02111-1307 USA. */ 19 20#ifndef _SYS_SENDFILE_H 21#define _SYS_SENDFILE_H 1 22 23#include <features.h> 24#include <sys/types.h> 25 26__BEGIN_DECLS 27 28/* Send up to COUNT bytes from file associated with IN_FD starting at 29 *OFFSET to descriptor OUT_FD. Set *OFFSET to the IN_FD's file position 30 following the read bytes. If OFFSET is a null pointer, use the normal 31 file position instead. Return the number of written bytes, or -1 in 32 case of error. */ 33#ifndef __USE_FILE_OFFSET64 34extern ssize_t sendfile (int __out_fd, int __in_fd, off_t *__offset, 35 size_t __count) __THROW; 36#else 37# ifdef __REDIRECT_NTH 38extern ssize_t __REDIRECT_NTH (sendfile, 39 (int __out_fd, int __in_fd, __off64_t *__offset, 40 size_t __count), sendfile64); 41# else 42# define sendfile sendfile64 43# endif 44#endif 45#ifdef __USE_LARGEFILE64 46extern ssize_t sendfile64 (int __out_fd, int __in_fd, __off64_t *__offset, 47 size_t __count) __THROW; 48#endif 49 50__END_DECLS 51 52#endif /* sys/sendfile.h */ 53