1/*
2  File: acl_init.c
3
4  Copyright (C) 1999, 2000
5  Andreas Gruenbacher, <a.gruenbacher@computer.org>
6
7  This program is free software; you can redistribute it and/or
8  modify it under the terms of the GNU Library General Public
9  License as published by the Free Software Foundation; either
10  version 2 of the License, or (at your option) any later version.
11
12  This program is distributed in the hope that it will be useful,
13  but WITHOUT ANY WARRANTY; without even the implied warranty of
14  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15  Library General Public License for more details.
16
17  You should have received a copy of the GNU Library General Public
18  License along with this library; if not, write to the Free Software
19  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20*/
21
22#include "libacl.h"
23
24
25acl_obj *
26__acl_init_obj(int count)
27{
28	acl_obj *acl_obj_p = new_obj_p(acl);
29	if (!acl_obj_p)
30		return NULL;
31	acl_obj_p->aused = 0;
32	acl_obj_p->aprev = acl_obj_p->anext = (acl_entry_obj *)acl_obj_p;
33	acl_obj_p->acurr = (acl_entry_obj *)acl_obj_p;
34
35	/* aprealloc points to an array of pre-allocated ACL entries.
36	   Entries between [aprealloc, aprealloc_end) are still available.
37	   Pre-allocated entries are consumed from the last entry to the
38	   first and aprealloc_end decremented. After all pre-allocated
39	   entries are consumed, further entries are malloc'ed.
40	   aprealloc == aprealloc_end is true when no more pre-allocated
41	   entries are available. */
42
43	if (count > 0)
44		acl_obj_p->aprealloc = (acl_entry_obj *)
45			malloc(count * sizeof(acl_entry_obj));
46	else
47		acl_obj_p->aprealloc = NULL;
48	if (acl_obj_p->aprealloc != NULL)
49		acl_obj_p->aprealloc_end = acl_obj_p->aprealloc + count;
50	else
51		acl_obj_p->aprealloc_end = NULL;
52
53	return acl_obj_p;
54}
55
56
57/* 23.4.20 */
58acl_t
59acl_init(int count)
60{
61	acl_obj *obj;
62	if (count < 0) {
63		errno = EINVAL;
64		return NULL;
65	}
66	obj = __acl_init_obj(count);
67	return int2ext(obj);
68}
69
70