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04277e02 | 1 | /* Copyright (C) 2015-2019 Free Software Foundation, Inc. |
676599b3 FW |
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 | __nss_rewrite_field (const char *value, char **to_be_freed) | |
28 | { | |
29 | *to_be_freed = NULL; | |
30 | if (value == NULL) | |
31 | return ""; | |
32 | ||
33 | /* Search for non-allowed characters. */ | |
34 | const char *p = strpbrk (value, __nss_invalid_field_characters); | |
35 | if (p == NULL) | |
36 | return value; | |
37 | *to_be_freed = __strdup (value); | |
38 | if (*to_be_freed == NULL) | |
39 | return NULL; | |
40 | ||
41 | /* Switch pointer to freshly-allocated buffer. */ | |
42 | char *bad = *to_be_freed + (p - value); | |
43 | do | |
44 | { | |
45 | *bad = ' '; | |
46 | bad = strpbrk (bad + 1, __nss_invalid_field_characters); | |
47 | } | |
48 | while (bad != NULL); | |
49 | ||
50 | return *to_be_freed; | |
51 | } |