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, 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
33 extern ssize_t sendfile (int __out_fd, int __in_fd, off_t *__offset,
34 			 size_t __count) __THROW;
35 #else
36 # ifdef __REDIRECT_NTH
37 extern 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
45 extern ssize_t sendfile64 (int __out_fd, int __in_fd, __off64_t *__offset,
46 			   size_t __count) __THROW;
47 libc_hidden_proto(sendfile64)
48 #endif
49 
50 __END_DECLS
51 
52 #endif	/* sys/sendfile.h */
53