1 | /* Copyright (C) 2000, 2004 Free Software Foundation, Inc. |
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2 | This file is part of the GNU C Library. |
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3 | |
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4 | The GNU C Library is free software; you can redistribute it and/or |
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5 | modify it under the terms of the GNU Lesser General Public |
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6 | License as published by the Free Software Foundation; either |
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7 | version 2.1 of the License, or (at your option) any later version. |
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8 | |
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9 | The GNU C Library is distributed in the hope that it will be useful, |
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10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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12 | Lesser General Public License for more details. |
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13 | |
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14 | You should have received a copy of the GNU Lesser General Public |
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15 | License along with the GNU C Library; if not, write to the Free |
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16 | Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
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17 | 02111-1307 USA. */ |
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18 | |
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19 | #include <errno.h> |
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20 | #include <stdlib.h> |
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21 | #include <netdb.h> |
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22 | #include "nsswitch.h" |
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23 | |
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24 | void * |
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25 | __nss_getent (getent_r_function func, void **resbuf, char **buffer, |
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26 | size_t buflen, size_t *buffer_size, int *h_errnop) |
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27 | { |
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28 | void *result; |
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29 | |
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30 | if (*buffer == NULL) |
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31 | { |
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32 | *buffer_size = buflen; |
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33 | *buffer = malloc (*buffer_size); |
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34 | } |
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35 | |
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36 | while (buffer != NULL |
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37 | && func (resbuf, *buffer, *buffer_size, &result, h_errnop) == ERANGE |
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38 | && (h_errnop == NULL || *h_errnop == NETDB_INTERNAL)) |
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39 | { |
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40 | char *new_buf; |
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41 | *buffer_size *= 2; |
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42 | new_buf = realloc (*buffer, *buffer_size); |
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43 | if (new_buf == NULL) |
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44 | { |
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45 | /* We are out of memory. Free the current buffer so that the |
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46 | process gets a chance for a normal termination. */ |
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47 | int save = errno; |
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48 | free (*buffer); |
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49 | __set_errno (save); |
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50 | } |
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51 | *buffer = new_buf; |
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52 | } |
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53 | |
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54 | if (*buffer == NULL) |
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55 | result = NULL; |
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56 | |
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57 | return result; |
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58 | } |
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