100 lines
2.9 KiB
C
100 lines
2.9 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*
|
|
* Copyright (c) 2021 Gleb Popov
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
/*
|
|
* acl_equiv_mode_np: Check if an ACL can be represented as a mode_t.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/errno.h>
|
|
#include <sys/stat.h>
|
|
#include <sys/acl.h>
|
|
|
|
#include "acl_support.h"
|
|
|
|
int
|
|
acl_equiv_mode_np(acl_t acl, mode_t *mode_p)
|
|
{
|
|
mode_t ret_mode = 0;
|
|
|
|
if (acl == NULL) {
|
|
errno = EINVAL;
|
|
return (-1);
|
|
}
|
|
|
|
/* Linux returns 0 for ACL returned by acl_init() */
|
|
if (_acl_brand(acl) == ACL_BRAND_UNKNOWN && acl->ats_acl.acl_cnt == 0)
|
|
return (0);
|
|
|
|
// TODO: Do we want to handle ACL_BRAND_NFS4 in this function? */
|
|
if (_acl_brand(acl) != ACL_BRAND_POSIX)
|
|
return (1);
|
|
|
|
for (int cur_entry = 0; cur_entry < acl->ats_acl.acl_cnt; cur_entry++) {
|
|
acl_entry_t entry = &acl->ats_acl.acl_entry[cur_entry];
|
|
|
|
if ((entry->ae_perm & ACL_PERM_BITS) != entry->ae_perm)
|
|
return (1);
|
|
|
|
switch (entry->ae_tag) {
|
|
case ACL_USER_OBJ:
|
|
if (entry->ae_perm & ACL_READ)
|
|
ret_mode |= S_IRUSR;
|
|
if (entry->ae_perm & ACL_WRITE)
|
|
ret_mode |= S_IWUSR;
|
|
if (entry->ae_perm & ACL_EXECUTE)
|
|
ret_mode |= S_IXUSR;
|
|
break;
|
|
case ACL_GROUP_OBJ:
|
|
if (entry->ae_perm & ACL_READ)
|
|
ret_mode |= S_IRGRP;
|
|
if (entry->ae_perm & ACL_WRITE)
|
|
ret_mode |= S_IWGRP;
|
|
if (entry->ae_perm & ACL_EXECUTE)
|
|
ret_mode |= S_IXGRP;
|
|
break;
|
|
case ACL_OTHER:
|
|
if (entry->ae_perm & ACL_READ)
|
|
ret_mode |= S_IROTH;
|
|
if (entry->ae_perm & ACL_WRITE)
|
|
ret_mode |= S_IWOTH;
|
|
if (entry->ae_perm & ACL_EXECUTE)
|
|
ret_mode |= S_IXOTH;
|
|
break;
|
|
default:
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
if (mode_p != NULL)
|
|
*mode_p = ret_mode;
|
|
|
|
return (0);
|
|
}
|