| /* Linux implementation of copy_file_range. |
| Copyright (C) 2017-2018 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/>. */ |
| |
| #include <errno.h> |
| #include <sysdep-cancel.h> |
| #include <unistd.h> |
| |
| /* Include the fallback implementation. */ |
| #ifndef __ASSUME_COPY_FILE_RANGE |
| #define COPY_FILE_RANGE_DECL static |
| #define COPY_FILE_RANGE copy_file_range_compat |
| #include <io/copy_file_range-compat.c> |
| #endif |
| |
| ssize_t |
| copy_file_range (int infd, __off64_t *pinoff, |
| int outfd, __off64_t *poutoff, |
| size_t length, unsigned int flags) |
| { |
| #ifdef __NR_copy_file_range |
| ssize_t ret = SYSCALL_CANCEL (copy_file_range, infd, pinoff, outfd, poutoff, |
| length, flags); |
| # ifndef __ASSUME_COPY_FILE_RANGE |
| if (ret == -1 && errno == ENOSYS) |
| ret = copy_file_range_compat (infd, pinoff, outfd, poutoff, length, flags); |
| # endif |
| return ret; |
| #else /* !__NR_copy_file_range */ |
| return copy_file_range_compat (infd, pinoff, outfd, poutoff, length, flags); |
| #endif |
| } |
