d81d5b2f2c
Reviewed by: kib, debdrup, gbe Approved by: kib Differential Revision: https://reviews.freebsd.org/D28255
102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2021 Gleb Popov
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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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/*
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* acl_equiv_mode_np: Check if an ACL can be represented as a mode_t.
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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 <sys/param.h>
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#include <sys/errno.h>
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#include <sys/stat.h>
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#include <sys/acl.h>
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#include "acl_support.h"
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int
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acl_equiv_mode_np(acl_t acl, mode_t *mode_p)
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{
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mode_t ret_mode = 0;
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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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/* Linux returns 0 for ACL returned by acl_init() */
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if (_acl_brand(acl) == ACL_BRAND_UNKNOWN && acl->ats_acl.acl_cnt == 0)
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return (0);
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// TODO: Do we want to handle ACL_BRAND_NFS4 in this function? */
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if (_acl_brand(acl) != ACL_BRAND_POSIX)
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return (1);
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for (int cur_entry = 0; cur_entry < acl->ats_acl.acl_cnt; cur_entry++) {
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acl_entry_t entry = &acl->ats_acl.acl_entry[cur_entry];
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if ((entry->ae_perm & ACL_PERM_BITS) != entry->ae_perm)
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return (1);
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switch (entry->ae_tag) {
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case ACL_USER_OBJ:
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if (entry->ae_perm & ACL_READ)
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ret_mode |= S_IRUSR;
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if (entry->ae_perm & ACL_WRITE)
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ret_mode |= S_IWUSR;
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if (entry->ae_perm & ACL_EXECUTE)
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ret_mode |= S_IXUSR;
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break;
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case ACL_GROUP_OBJ:
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if (entry->ae_perm & ACL_READ)
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ret_mode |= S_IRGRP;
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if (entry->ae_perm & ACL_WRITE)
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ret_mode |= S_IWGRP;
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if (entry->ae_perm & ACL_EXECUTE)
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ret_mode |= S_IXGRP;
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break;
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case ACL_OTHER:
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if (entry->ae_perm & ACL_READ)
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ret_mode |= S_IROTH;
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if (entry->ae_perm & ACL_WRITE)
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ret_mode |= S_IWOTH;
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if (entry->ae_perm & ACL_EXECUTE)
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ret_mode |= S_IXOTH;
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break;
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default:
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return (1);
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}
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}
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if (mode_p != NULL)
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*mode_p = ret_mode;
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return (0);
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}
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