/*
File: acl_calc_mask.c
Copyright (C) 1999, 2000
Andreas Gruenbacher, <a.gruenbacher@bestbits.at>
This program 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.
This program 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 this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "libacl.h"
/* 23.4.2 */
int
acl_calc_mask(acl_t *acl_p)
{
acl_obj *acl_obj_p;
acl_entry_obj *entry_obj_p, *mask_obj_p = NULL;
permset_t perm = ACL_PERM_NONE;
if (!acl_p) {
errno = EINVAL;
return -1;
}
acl_obj_p = ext2int(acl, *acl_p);
if (!acl_obj_p)
return -1;
FOREACH_ACL_ENTRY(entry_obj_p, acl_obj_p) {
switch(entry_obj_p->etag) {
case ACL_USER_OBJ:
case ACL_OTHER:
break;
case ACL_MASK:
mask_obj_p = entry_obj_p;
break;
case ACL_USER:
case ACL_GROUP_OBJ:
case ACL_GROUP:
perm |= entry_obj_p->eperm.sperm;
break;
default:
errno = EINVAL;
return -1;
}
}
if (mask_obj_p == NULL) {
mask_obj_p = __acl_create_entry_obj(acl_obj_p);
if (mask_obj_p == NULL)
return -1;
mask_obj_p->etag = ACL_MASK;
__acl_reorder_entry_obj_p(mask_obj_p);
}
mask_obj_p->eperm.sperm = perm;
return 0;
}