1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #pragma once 30 31 /** 32 * @file sys/sendfile.h 33 * @brief The sendfile() function. 34 */ 35 36 #include <sys/cdefs.h> 37 #include <sys/types.h> 38 39 __BEGIN_DECLS 40 41 /* See https://android.googlesource.com/platform/bionic/+/main/docs/32-bit-abi.md */ 42 #if defined(__USE_FILE_OFFSET64) 43 ssize_t sendfile(int __out_fd, int __in_fd, off_t* _Nullable __offset, size_t __count) __RENAME(sendfile64); 44 #else 45 /** 46 * [sendfile(2)](http://man7.org/linux/man-pages/man2/sendfile.2.html) copies data directly 47 * between two file descriptors. 48 * 49 * Returns the number of bytes copied on success, and returns -1 and sets `errno` on failure. 50 */ 51 ssize_t sendfile(int __out_fd, int __in_fd, off_t* _Nullable __offset, size_t __count); 52 #endif 53 54 /** 55 * Like sendfile() but allows using a 64-bit offset 56 * even from a 32-bit process without `_FILE_OFFSET_BITS=64`. 57 */ 58 ssize_t sendfile64(int __out_fd, int __in_fd, off64_t* _Nullable __offset, size_t __count); 59 60 __END_DECLS 61