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 <sysdep.h> |
19 | #include <errno.h> |
20 | #include <unistd.h> |
21 | #include <stddef.h> |
22 | |
23 | /* Write NBYTES of BUF to FD. Return the number written, or -1. */ |
24 | ssize_t |
25 | __libc_write (int fd, const void *buf, size_t nbytes) |
26 | { |
27 | if (nbytes == 0) |
28 | return 0; |
29 | if (fd < 0) |
30 | { |
31 | __set_errno (EBADF); |
32 | return -1; |
33 | } |
34 | if (buf == NULL) |
35 | { |
36 | __set_errno (EINVAL); |
37 | return -1; |
38 | } |
39 | |
40 | __set_errno (ENOSYS); |
41 | return -1; |
42 | } |
43 | libc_hidden_def (__libc_write) |
44 | stub_warning (write) |
45 | |
46 | weak_alias (__libc_write, __write) |
47 | libc_hidden_weak (__write) |
48 | weak_alias (__libc_write, write) |
49 | libc_hidden_weak (write) |
50 | |