xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 2015-2016 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 | <http://www.gnu.org/licenses/>. */ |
| 17 | |
| 18 | #include <nss.h> |
| 19 | #include <string.h> |
| 20 | |
| 21 | /* Rewrite VALUE to a valid field value in the NSS database. Invalid |
| 22 | characters are replaced with a single space character ' '. If |
| 23 | VALUE is NULL, the empty string is returned. *TO_BE_FREED is |
| 24 | overwritten with a pointer the caller has to free if the function |
| 25 | returns successfully. On failure, return NULL. */ |
| 26 | const char * |
| 27 | internal_function |
| 28 | __nss_rewrite_field (const char *value, char **to_be_freed) |
| 29 | { |
| 30 | *to_be_freed = NULL; |
| 31 | if (value == NULL) |
| 32 | return ""; |
| 33 | |
| 34 | /* Search for non-allowed characters. */ |
| 35 | const char *p = strpbrk (value, __nss_invalid_field_characters); |
| 36 | if (p == NULL) |
| 37 | return value; |
| 38 | *to_be_freed = __strdup (value); |
| 39 | if (*to_be_freed == NULL) |
| 40 | return NULL; |
| 41 | |
| 42 | /* Switch pointer to freshly-allocated buffer. */ |
| 43 | char *bad = *to_be_freed + (p - value); |
| 44 | do |
| 45 | { |
| 46 | *bad = ' '; |
| 47 | bad = strpbrk (bad + 1, __nss_invalid_field_characters); |
| 48 | } |
| 49 | while (bad != NULL); |
| 50 | |
| 51 | return *to_be_freed; |
| 52 | } |