129 lines
2.8 KiB
C
129 lines
2.8 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 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 <string.h>
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static int
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_perm_is_invalid(acl_perm_t perm)
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{
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/* Check if more than a single bit is set. */
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if ((perm & -perm) == perm &&
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(perm & (ACL_POSIX1E_BITS | ACL_NFS4_PERM_BITS)) == perm)
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return (0);
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errno = EINVAL;
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return (1);
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}
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/*
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* acl_add_perm() (23.4.1): add the permission contained in perm to the
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* permission set permset_d
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*/
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int
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acl_add_perm(acl_permset_t permset_d, acl_perm_t perm)
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{
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if (permset_d == NULL) {
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errno = EINVAL;
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return (-1);
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}
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if (_perm_is_invalid(perm))
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return (-1);
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*permset_d |= perm;
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return (0);
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}
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/*
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* acl_clear_perms() (23.4.3): clear all permisions from the permission
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* set permset_d
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*/
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int
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acl_clear_perms(acl_permset_t permset_d)
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{
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if (permset_d == NULL) {
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errno = EINVAL;
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return (-1);
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}
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*permset_d = ACL_PERM_NONE;
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return (0);
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}
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/*
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* acl_delete_perm() (23.4.10): remove the permission in perm from the
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* permission set permset_d
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*/
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int
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acl_delete_perm(acl_permset_t permset_d, acl_perm_t perm)
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{
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if (permset_d == NULL) {
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errno = EINVAL;
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return (-1);
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}
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if (_perm_is_invalid(perm))
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return (-1);
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*permset_d &= ~perm;
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return (0);
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}
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int
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acl_get_perm_np(acl_permset_t permset_d, acl_perm_t perm)
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{
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if (permset_d == NULL) {
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errno = EINVAL;
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return (-1);
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}
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if (_perm_is_invalid(perm))
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return (-1);
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if (*permset_d & perm)
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return (1);
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return (0);
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}
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