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f7a9f785 | 1 | /* Copyright (C) 2011-2016 Free Software Foundation, Inc. |
a63c7fa1 CM |
2 | This file is part of the GNU C Library. |
3 | Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. | |
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 | |
ab84e3ff PE |
16 | License along with the GNU C Library. If not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
a63c7fa1 CM |
18 | |
19 | #include <sys/sendfile.h> | |
20 | #include <errno.h> | |
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 | { | |
27 | __off64_t off64; | |
28 | int rc; | |
29 | ||
30 | if (offset != NULL) | |
31 | { | |
32 | if (*offset < 0 || (off_t) (*offset + count) < 0) | |
33 | { | |
34 | __set_errno (EINVAL); | |
35 | return -1; | |
36 | } | |
37 | off64 = *offset; | |
38 | } | |
39 | ||
40 | rc = INLINE_SYSCALL (sendfile64, 4, out_fd, in_fd, | |
41 | offset ? &off64 : NULL, count); | |
42 | if (offset) | |
43 | *offset = off64; | |
44 | return rc; | |
45 | } |