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58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* Copyright (C) 2000-2023 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <stdlib.h>
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#include <netdb.h>
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#include "nsswitch.h"
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void *
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__nss_getent (getent_r_function func, void **resbuf, char **buffer,
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size_t buflen, size_t *buffer_size, int *h_errnop)
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{
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void *result;
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if (*buffer == NULL)
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{
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*buffer_size = buflen;
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*buffer = malloc (*buffer_size);
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}
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while (*buffer != NULL
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&& func (resbuf, *buffer, *buffer_size, &result, h_errnop) == ERANGE
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&& (h_errnop == NULL || *h_errnop == NETDB_INTERNAL))
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{
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char *new_buf;
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*buffer_size *= 2;
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new_buf = realloc (*buffer, *buffer_size);
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if (new_buf == NULL)
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{
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/* We are out of memory. Free the current buffer so that the
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process gets a chance for a normal termination. */
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int save = errno;
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free (*buffer);
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__set_errno (save);
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}
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*buffer = new_buf;
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}
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if (*buffer == NULL)
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result = NULL;
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return result;
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}
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