45d55945fd
empty ACL, and to append an entry to an ACL. Submitted by: sef@ MFC after: 1 month Sponsored by: The FreeBSD Foundation
147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
/*
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* Copyright (c) 2001-2002 Chris D. Faulhaber
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include "namespace.h"
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#include <sys/acl.h>
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#include "un-namespace.h"
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#include <errno.h>
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#include <stdlib.h>
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/*
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* acl_create_entry() (23.4.7): create a new ACL entry in the ACL pointed
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* to by acl_p.
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*/
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int
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acl_create_entry(acl_t *acl_p, acl_entry_t *entry_p)
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{
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struct acl *acl_int;
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if (acl_p == NULL) {
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errno = EINVAL;
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return (-1);
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}
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acl_int = &(*acl_p)->ats_acl;
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/*
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* +1, because we are checking if there is space left for one more
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* entry.
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*/
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if (acl_int->acl_cnt + 1 >= ACL_MAX_ENTRIES) {
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errno = EINVAL;
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return (-1);
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}
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*entry_p = &acl_int->acl_entry[acl_int->acl_cnt++];
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(**entry_p).ae_tag = ACL_UNDEFINED_TAG;
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(**entry_p).ae_id = ACL_UNDEFINED_ID;
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(**entry_p).ae_perm = ACL_PERM_NONE;
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(**entry_p).ae_entry_type = 0;
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(**entry_p).ae_flags = 0;
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(*acl_p)->ats_cur_entry = 0;
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return (0);
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}
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int
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acl_create_entry_np(acl_t *acl_p, acl_entry_t *entry_p, int offset)
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{
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int i;
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struct acl *acl_int;
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if (acl_p == NULL) {
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errno = EINVAL;
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return (-1);
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}
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acl_int = &(*acl_p)->ats_acl;
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if (acl_int->acl_cnt + 1 >= ACL_MAX_ENTRIES) {
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errno = EINVAL;
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return (-1);
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}
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if (offset < 0 || offset > acl_int->acl_cnt) {
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errno = EINVAL;
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return (-1);
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}
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/* Make room for the new entry. */
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for (i = acl_int->acl_cnt; i > offset; i--)
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acl_int->acl_entry[i] = acl_int->acl_entry[i - 1];
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acl_int->acl_cnt++;
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*entry_p = &acl_int->acl_entry[offset];
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(**entry_p).ae_tag = ACL_UNDEFINED_TAG;
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(**entry_p).ae_id = ACL_UNDEFINED_ID;
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(**entry_p).ae_perm = ACL_PERM_NONE;
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(**entry_p).ae_entry_type = 0;
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(**entry_p).ae_flags= 0;
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(*acl_p)->ats_cur_entry = 0;
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return (0);
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}
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/*
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* acl_get_entry() (23.4.14): returns an ACL entry from an ACL
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* indicated by entry_id.
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*/
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int
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acl_get_entry(acl_t acl, int entry_id, acl_entry_t *entry_p)
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{
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struct acl *acl_int;
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if (acl == NULL) {
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errno = EINVAL;
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return (-1);
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}
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acl_int = &acl->ats_acl;
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switch(entry_id) {
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case ACL_FIRST_ENTRY:
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acl->ats_cur_entry = 0;
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/* PASSTHROUGH */
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case ACL_NEXT_ENTRY:
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if (acl->ats_cur_entry >= acl->ats_acl.acl_cnt)
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return 0;
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*entry_p = &acl_int->acl_entry[acl->ats_cur_entry++];
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return (1);
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}
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errno = EINVAL;
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return (-1);
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}
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