freebsd-dev/lib/libc/posix1e/acl_valid.c
Pedro F. Giffuni d915a14ef0 libc: further adoption of SPDX licensing ID tags.
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using mis-identified many licenses so this was mostly a manual - error
prone - task.

The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
2017-11-25 17:12:48 +00:00

127 lines
3.4 KiB
C

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 1999, 2000, 2001, 2002 Robert N. M. Watson
* All rights reserved.
*
* This software was developed by Robert Watson for the TrustedBSD Project.
*
* 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_valid -- POSIX.1e ACL check routine
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include "namespace.h"
#include <sys/acl.h>
#include "un-namespace.h"
#include <sys/errno.h>
#include <stdlib.h>
#include "acl_support.h"
/*
* acl_valid: accepts an ACL, returns 0 on valid ACL, -1 for invalid,
* and errno set to EINVAL.
*
* Implemented by calling the acl_check routine in acl_support, which
* requires ordering. We call acl_support's _posix1e_acl_sort to make this
* true. POSIX.1e allows acl_valid() to reorder the ACL as it sees fit.
*
* This call is deprecated, as it doesn't ask whether the ACL is valid
* for a particular target. However, this call is standardized, unlike
* the other two forms.
*/
int
acl_valid(acl_t acl)
{
int error;
if (acl == NULL) {
errno = EINVAL;
return (-1);
}
if (!_acl_brand_may_be(acl, ACL_BRAND_POSIX)) {
errno = EINVAL;
return (-1);
}
_posix1e_acl_sort(acl);
error = _posix1e_acl_check(acl);
if (error) {
errno = error;
return (-1);
} else {
return (0);
}
}
int
acl_valid_file_np(const char *pathp, acl_type_t type, acl_t acl)
{
if (pathp == NULL || acl == NULL) {
errno = EINVAL;
return (-1);
}
type = _acl_type_unold(type);
if (_posix1e_acl(acl, type))
_posix1e_acl_sort(acl);
return (__acl_aclcheck_file(pathp, type, &acl->ats_acl));
}
int
acl_valid_link_np(const char *pathp, acl_type_t type, acl_t acl)
{
if (pathp == NULL || acl == NULL) {
errno = EINVAL;
return (-1);
}
type = _acl_type_unold(type);
if (_posix1e_acl(acl, type))
_posix1e_acl_sort(acl);
return (__acl_aclcheck_link(pathp, type, &acl->ats_acl));
}
int
acl_valid_fd_np(int fd, acl_type_t type, acl_t acl)
{
if (acl == NULL) {
errno = EINVAL;
return (-1);
}
type = _acl_type_unold(type);
if (_posix1e_acl(acl, type))
_posix1e_acl_sort(acl);
acl->ats_cur_entry = 0;
return (___acl_aclcheck_fd(fd, type, &acl->ats_acl));
}