58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
/* Copyright (C) 2000-2022 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;
|
|
}
|