From 55f44129526d6bae0595300c03fcd681f83ededb Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Fri, 8 Dec 2000 22:38:13 +0000 Subject: Generic getXXent function. --- nss/getnssent.c | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 nss/getnssent.c (limited to 'nss/getnssent.c') diff --git a/nss/getnssent.c b/nss/getnssent.c new file mode 100644 index 0000000000..1180e3c138 --- /dev/null +++ b/nss/getnssent.c @@ -0,0 +1,64 @@ +/* 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 +#include +#include +#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; +} -- cgit v1.2.3