1 | /* NSS service provider with errno clobber. |
2 | Copyright (C) 2022-2024 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 <nss.h> |
21 | #include <stdlib.h> |
22 | |
23 | /* Catch misnamed and functions. */ |
24 | #pragma GCC diagnostic error "-Wmissing-prototypes" |
25 | NSS_DECLARE_MODULE_FUNCTIONS (test_errno) |
26 | |
27 | static void __attribute__ ((constructor)) |
28 | init (void) |
29 | { |
30 | /* An arbitrary error code which is otherwise not used. */ |
31 | errno = -1009; |
32 | } |
33 | |
34 | /* Lookup functions for pwd follow that do not return any data. */ |
35 | |
36 | /* Catch misnamed function definitions. */ |
37 | |
38 | enum nss_status |
39 | _nss_test_errno_setpwent (int stayopen) |
40 | { |
41 | setenv (name: "_nss_test_errno_setpwent" , value: "yes" , replace: 1); |
42 | return NSS_STATUS_SUCCESS; |
43 | } |
44 | |
45 | enum nss_status |
46 | _nss_test_errno_getpwent_r (struct passwd *result, |
47 | char *buffer, size_t size, int *errnop) |
48 | { |
49 | setenv (name: "_nss_test_errno_getpwent_r" , value: "yes" , replace: 1); |
50 | return NSS_STATUS_NOTFOUND; |
51 | } |
52 | |
53 | enum nss_status |
54 | _nss_test_errno_endpwent (void) |
55 | { |
56 | setenv (name: "_nss_test_errno_endpwent" , value: "yes" , replace: 1); |
57 | return NSS_STATUS_SUCCESS; |
58 | } |
59 | |