lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Copyright (C) 2000-2015 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 <errno.h> |
| 19 | #include <stdlib.h> |
| 20 | #include <netdb.h> |
| 21 | #include "nsswitch.h" |
| 22 | |
| 23 | void * |
| 24 | __nss_getent (getent_r_function func, void **resbuf, char **buffer, |
| 25 | size_t buflen, size_t *buffer_size, int *h_errnop) |
| 26 | { |
| 27 | void *result; |
| 28 | |
| 29 | if (*buffer == NULL) |
| 30 | { |
| 31 | *buffer_size = buflen; |
| 32 | *buffer = malloc (*buffer_size); |
| 33 | } |
| 34 | |
| 35 | while (*buffer != NULL |
| 36 | && func (resbuf, *buffer, *buffer_size, &result, h_errnop) == ERANGE |
| 37 | && (h_errnop == NULL || *h_errnop == NETDB_INTERNAL)) |
| 38 | { |
| 39 | char *new_buf; |
| 40 | *buffer_size *= 2; |
| 41 | new_buf = realloc (*buffer, *buffer_size); |
| 42 | if (new_buf == NULL) |
| 43 | { |
| 44 | /* We are out of memory. Free the current buffer so that the |
| 45 | process gets a chance for a normal termination. */ |
| 46 | int save = errno; |
| 47 | free (*buffer); |
| 48 | __set_errno (save); |
| 49 | } |
| 50 | *buffer = new_buf; |
| 51 | } |
| 52 | |
| 53 | if (*buffer == NULL) |
| 54 | result = NULL; |
| 55 | |
| 56 | return result; |
| 57 | } |