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sendfile.h
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/* sendfile -- copy data directly from one file descriptor to another Copyright (C) 1998-2018 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 <http://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 */