| 1 | /* NSS service provider with errno clobber. |
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| 2 | Copyright (C) 2022 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <errno.h> |
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| 20 | #include <nss.h> |
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| 21 | #include <stdlib.h> |
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| 22 | |
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| 23 | /* Catch misnamed and functions. */ |
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| 24 | #pragma GCC diagnostic error "-Wmissing-prototypes" |
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| 25 | NSS_DECLARE_MODULE_FUNCTIONS (test_errno) |
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| 26 | |
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| 27 | static void __attribute__ ((constructor)) |
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| 28 | init (void) |
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| 29 | { |
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| 30 | /* An arbitrary error code which is otherwise not used. */ |
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| 31 | errno = -1009; |
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| 32 | } |
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| 33 | |
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| 34 | /* Lookup functions for pwd follow that do not return any data. */ |
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| 35 | |
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| 36 | /* Catch misnamed function definitions. */ |
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| 37 | |
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| 38 | enum nss_status |
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| 39 | _nss_test_errno_setpwent (int stayopen) |
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| 40 | { |
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| 41 | setenv (name: "_nss_test_errno_setpwent" , value: "yes" , replace: 1); |
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| 42 | return NSS_STATUS_SUCCESS; |
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| 43 | } |
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| 44 | |
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| 45 | enum nss_status |
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| 46 | _nss_test_errno_getpwent_r (struct passwd *result, |
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| 47 | char *buffer, size_t size, int *errnop) |
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| 48 | { |
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| 49 | setenv (name: "_nss_test_errno_getpwent_r" , value: "yes" , replace: 1); |
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| 50 | return NSS_STATUS_NOTFOUND; |
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| 51 | } |
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| 52 | |
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| 53 | enum nss_status |
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| 54 | _nss_test_errno_endpwent (void) |
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| 55 | { |
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| 56 | setenv (name: "_nss_test_errno_endpwent" , value: "yes" , replace: 1); |
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| 57 | return NSS_STATUS_SUCCESS; |
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| 58 | } |
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| 59 | |
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