1 | /* Copyright (C) 1991-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <unistd.h> |
20 | |
21 | /* Write NBYTES of BUF to FD at given position OFFSET without changing |
22 | the file position. Return the number written, or -1. */ |
23 | ssize_t |
24 | __libc_pwrite (int fd, const void *buf, size_t nbytes, off_t offset) |
25 | { |
26 | if (nbytes == 0) |
27 | return 0; |
28 | if (fd < 0) |
29 | { |
30 | __set_errno (EBADF); |
31 | return -1; |
32 | } |
33 | if (buf == NULL || offset < 0) |
34 | { |
35 | __set_errno (EINVAL); |
36 | return -1; |
37 | } |
38 | |
39 | __set_errno (ENOSYS); |
40 | return -1; |
41 | } |
42 | strong_alias (__libc_pwrite, __pwrite) |
43 | weak_alias (__libc_pwrite, pwrite) |
44 | stub_warning (pwrite) |
45 | |