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7db20e36 | 1 | /* sendfile -- copy data directly from one file descriptor to another |
2b778ceb | 2 | Copyright (C) 2002-2021 Free Software Foundation, Inc. |
7db20e36 RM |
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 | |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
7db20e36 RM |
18 | |
19 | #include <sys/sendfile.h> | |
337738b7 | 20 | #include <stddef.h> |
7db20e36 RM |
21 | |
22 | /* Send COUNT bytes from file associated with IN_FD starting at OFFSET to | |
23 | descriptor OUT_FD. */ | |
24 | ssize_t | |
25 | sendfile (int out_fd, int in_fd, off_t *offset, size_t count) | |
26 | { | |
337738b7 | 27 | if (offset == NULL || sizeof (off_t) == sizeof (off64_t)) |
298a8b59 | 28 | return __sendfile64 (out_fd, in_fd, (off64_t *) offset, count); |
337738b7 | 29 | else |
7db20e36 | 30 | { |
337738b7 | 31 | off64_t ofs = *offset; |
298a8b59 | 32 | ssize_t ret = __sendfile64 (out_fd, in_fd, &ofs, count); |
337738b7 RM |
33 | *offset = ofs; |
34 | return ret; | |
7db20e36 | 35 | } |
7db20e36 | 36 | } |