--- /dev/null
+/* Copyright (C) 2000 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 Library General Public License as
+ published by the Free Software Foundation; either version 2 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#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;
+ int save;
+
+ 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 += buflen;
+ 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. */
+ save = errno;
+ free (*buffer);
+ __set_errno (save);
+ }
+ *buffer = new_buf;
+ }
+
+ if (*buffer == NULL)
+ result = NULL;
+
+ /* Release lock. Preserve error value. */
+ save = errno;
+ __set_errno (save);
+
+ return result;
+}