| /* Copyright (C) 2015-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <nss.h> |
| #include <string.h> |
| |
| /* Rewrite VALUE to a valid field value in the NSS database. Invalid |
| characters are replaced with a single space character ' '. If |
| VALUE is NULL, the empty string is returned. *TO_BE_FREED is |
| overwritten with a pointer the caller has to free if the function |
| returns successfully. On failure, return NULL. */ |
| const char * |
| __nss_rewrite_field (const char *value, char **to_be_freed) |
| { |
| *to_be_freed = NULL; |
| if (value == NULL) |
| return ""; |
| |
| /* Search for non-allowed characters. */ |
| const char *p = strpbrk (value, __nss_invalid_field_characters); |
| if (p == NULL) |
| return value; |
| *to_be_freed = __strdup (value); |
| if (*to_be_freed == NULL) |
| return NULL; |
| |
| /* Switch pointer to freshly-allocated buffer. */ |
| char *bad = *to_be_freed + (p - value); |
| do |
| { |
| *bad = ' '; |
| bad = strpbrk (bad + 1, __nss_invalid_field_characters); |
| } |
| while (bad != NULL); |
| |
| return *to_be_freed; |
| } |