1 | /* Reentrant function to return the current login name. Hurd version. |
2 | Copyright (C) 1996-2022 Free Software Foundation, Inc. |
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 | <https://www.gnu.org/licenses/>. */ |
18 | |
19 | #include <errno.h> |
20 | #include <unistd.h> |
21 | #include <hurd.h> |
22 | #include <string.h> |
23 | |
24 | /* Return at most NAME_LEN characters of the login name of the user in NAME. |
25 | If it cannot be determined or some other error occurred, return the error |
26 | code. Otherwise return 0. */ |
27 | int |
28 | __getlogin_r (char *name, size_t name_len) |
29 | { |
30 | string_t login; |
31 | error_t err; |
32 | |
33 | if (err = __USEPORT (PROC, __proc_getlogin (port, login))) |
34 | return errno = err; |
35 | |
36 | size_t len = __strnlen (login, sizeof login - 1) + 1; |
37 | if (len > name_len) |
38 | { |
39 | errno = ERANGE; |
40 | return errno; |
41 | } |
42 | |
43 | memcpy (name, login, len); |
44 | return 0; |
45 | } |
46 | libc_hidden_def (__getlogin_r) |
47 | weak_alias (__getlogin_r, getlogin_r) |
48 | libc_hidden_weak (getlogin_r) |
49 | |