19f7f91133
Reviewed by: kib, debdrup, gbe Approved by: kib Differential Revision: https://reviews.freebsd.org/D28255
116 lines
3.2 KiB
C
116 lines
3.2 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2021 Robert N M Watson, 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_from_mode_np: Create an ACL from a mode_t.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/types.h>
|
|
#include <sys/param.h>
|
|
#include <sys/acl.h>
|
|
#include <sys/stat.h>
|
|
|
|
/*
|
|
* return an ACL corresponding to the permissions
|
|
* contained in mode_t
|
|
*/
|
|
acl_t
|
|
acl_from_mode_np(const mode_t mode)
|
|
{
|
|
acl_t acl;
|
|
acl_entry_t entry;
|
|
acl_permset_t perms;
|
|
|
|
/* create the ACL */
|
|
acl = acl_init(3);
|
|
/* here and below, the only possible reason to fail is ENOMEM, so
|
|
* no need to set errno again
|
|
*/
|
|
if (acl == NULL)
|
|
return (NULL);
|
|
|
|
/* First entry: ACL_USER_OBJ */
|
|
if (acl_create_entry(&acl, &entry) == -1)
|
|
return (NULL);
|
|
/* TODO: need to handle error there and below? */
|
|
acl_set_tag_type(entry, ACL_USER_OBJ);
|
|
|
|
acl_get_permset(entry, &perms);
|
|
acl_clear_perms(perms);
|
|
|
|
/* calculate user mode */
|
|
if (mode & S_IRUSR)
|
|
acl_add_perm(perms, ACL_READ);
|
|
if (mode & S_IWUSR)
|
|
acl_add_perm(perms, ACL_WRITE);
|
|
if (mode & S_IXUSR)
|
|
acl_add_perm(perms, ACL_EXECUTE);
|
|
|
|
acl_set_permset(entry, perms);
|
|
|
|
/* Second entry: ACL_GROUP_OBJ */
|
|
if (acl_create_entry(&acl, &entry) == -1)
|
|
return (NULL);
|
|
acl_set_tag_type(entry, ACL_GROUP_OBJ);
|
|
|
|
acl_get_permset(entry, &perms);
|
|
acl_clear_perms(perms);
|
|
|
|
/* calculate group mode */
|
|
if (mode & S_IRGRP)
|
|
acl_add_perm(perms, ACL_READ);
|
|
if (mode & S_IWGRP)
|
|
acl_add_perm(perms, ACL_WRITE);
|
|
if (mode & S_IXGRP)
|
|
acl_add_perm(perms, ACL_EXECUTE);
|
|
|
|
acl_set_permset(entry, perms);
|
|
|
|
/* Third entry: ACL_OTHER */
|
|
if (acl_create_entry(&acl, &entry) == -1)
|
|
return (NULL);
|
|
acl_set_tag_type(entry, ACL_OTHER);
|
|
|
|
acl_get_permset(entry, &perms);
|
|
acl_clear_perms(perms);
|
|
|
|
/* calculate other mode */
|
|
if (mode & S_IROTH)
|
|
acl_add_perm(perms, ACL_READ);
|
|
if (mode & S_IWOTH)
|
|
acl_add_perm(perms, ACL_WRITE);
|
|
if (mode & S_IXOTH)
|
|
acl_add_perm(perms, ACL_EXECUTE);
|
|
|
|
acl_set_permset(entry, perms);
|
|
|
|
return (acl);
|
|
}
|