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/* Copyright (C) 2000-2019 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
<https://www.gnu.org/licenses/>. */
#include <errno.h>
#include <stdlib.h>
#include <netdb.h>
#include "nsswitch.h"
void *
__nss_getent (getent_r_function func, void **resbuf, char **buffer,
size_t buflen, size_t *buffer_size, int *h_errnop)
{
void *result;
if (*buffer == NULL)
{
*buffer_size = buflen;
*buffer = malloc (*buffer_size);
}
while (*buffer != NULL
&& func (resbuf, *buffer, *buffer_size, &result, h_errnop) == ERANGE
&& (h_errnop == NULL || *h_errnop == NETDB_INTERNAL))
{
char *new_buf;
*buffer_size *= 2;
new_buf = realloc (*buffer, *buffer_size);
if (new_buf == NULL)
{
/* We are out of memory. Free the current buffer so that the
process gets a chance for a normal termination. */
int save = errno;
free (*buffer);
__set_errno (save);
}
*buffer = new_buf;
}
if (*buffer == NULL)
result = NULL;
return result;
}
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