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bad7a0c8 | 1 | /* Linux implementation of copy_file_range. |
688903eb | 2 | Copyright (C) 2017-2018 Free Software Foundation, Inc. |
bad7a0c8 FW |
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 | #include <errno.h> | |
20 | #include <sysdep-cancel.h> | |
21 | #include <unistd.h> | |
22 | ||
23 | /* Include the fallback implementation. */ | |
24 | #ifndef __ASSUME_COPY_FILE_RANGE | |
25 | #define COPY_FILE_RANGE_DECL static | |
26 | #define COPY_FILE_RANGE copy_file_range_compat | |
27 | #include <io/copy_file_range-compat.c> | |
28 | #endif | |
29 | ||
30 | ssize_t | |
31 | copy_file_range (int infd, __off64_t *pinoff, | |
32 | int outfd, __off64_t *poutoff, | |
33 | size_t length, unsigned int flags) | |
34 | { | |
35 | #ifdef __NR_copy_file_range | |
36 | ssize_t ret = SYSCALL_CANCEL (copy_file_range, infd, pinoff, outfd, poutoff, | |
37 | length, flags); | |
38 | # ifndef __ASSUME_COPY_FILE_RANGE | |
39 | if (ret == -1 && errno == ENOSYS) | |
40 | ret = copy_file_range_compat (infd, pinoff, outfd, poutoff, length, flags); | |
41 | # endif | |
42 | return ret; | |
43 | #else /* !__NR_copy_file_range */ | |
44 | return copy_file_range_compat (infd, pinoff, outfd, poutoff, length, flags); | |
45 | #endif | |
46 | } |