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libc/posix1e: Add acl_cmp_np() function.
Reviewed by: kib, debdrup, gbe Approved by: kib Differential Revision: https://reviews.freebsd.org/D28255
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19f7f91133
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@ -11,6 +11,7 @@ subr_acl_nfs4.c: ${SRCTOP}/sys/kern/subr_acl_nfs4.c
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CONFS+= posix1e/mac.conf
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SRCS+= acl_branding.c \
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acl_calc_mask.c \
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acl_cmp_np.c \
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acl_compat.c \
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acl_copy.c \
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acl_delete.c \
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@ -47,6 +48,7 @@ MAN+= acl.3 \
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acl_calc_mask.3 \
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acl_clear_flags_np.3 \
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acl_clear_perms.3 \
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acl_cmp_np.3 \
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acl_copy_entry.3 \
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acl_create_entry.3 \
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acl_delete.3 \
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@ -86,5 +86,6 @@ FBSD_1.1 {
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};
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FBSD_1.7 {
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acl_cmp_np;
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acl_from_mode_np;
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};
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83
lib/libc/posix1e/acl_cmp_np.3
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83
lib/libc/posix1e/acl_cmp_np.3
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@ -0,0 +1,83 @@
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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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.Dd January 20, 2021
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.Dt ACL_CMP_NP 3
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.Os
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.Sh NAME
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.Nm acl_cmp
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.Nd compare between two ACLs
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.In sys/types.h
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.In sys/acl.h
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.Ft int
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.Fn acl_cmp_np "acl_t acl1" "acl_t acl2"
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.Sh DESCRIPTION
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The
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.Fn acl_cmp_np
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function is a non-portable call that checks if ACLs pointed to by
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.Va acl1
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and
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.Va acl2
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are equivalent.
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The two ACLs are considered equal when they contain the same
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entries with matching tag types, qualifiers and permissions.
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.Sh RETURN VALUES
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Upon successful completion, this function returns 0 if the given ACLs are
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equivalent and 1 if they differ.
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Otherwise, the value -1 is returned, and
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.Va errno
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indicates the error.
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.Sh ERRORS
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If any of the following conditions occur, the
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.Fn acl_cmp_np
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function shall return a value of
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.Va -1
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and set
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.Va errno
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to the corresponding value:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Either first or second argument does not point to a valid ACL.
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.Sh SEE ALSO
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.Xr acl 3 ,
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.Xr posix1e 3
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.Sh STANDARDS
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POSIX.1e is described in IEEE POSIX.1e draft 17.
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Discussion
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of the draft continues on the cross-platform POSIX.1e implementation
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mailing list.
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To join this list, see the
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.Fx
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POSIX.1e implementation
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page for more information.
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.Sh HISTORY
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POSIX.1e support was introduced in
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.Fx 4.0 ,
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and development continues.
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.Sh AUTHORS
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.An Gleb Popov
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55
lib/libc/posix1e/acl_cmp_np.c
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55
lib/libc/posix1e/acl_cmp_np.c
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@ -0,0 +1,55 @@
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/*-
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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_cmp_np: Compare two ACL's.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/acl.h>
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#include <sys/errno.h>
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#include "acl_support.h"
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/*
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* returns 0 if acl_t's are identical, 1 otherwise
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*/
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int
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acl_cmp_np(acl_t acl1, acl_t acl2)
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{
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if (acl1 == NULL || acl2 == NULL) {
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errno = EINVAL;
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return (-1);
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}
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if (_acl_brand(acl1) != _acl_brand(acl2))
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return (1);
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return (_acl_differs(acl1, acl2));
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}
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@ -62,8 +62,6 @@ _acl_differs(const acl_t a, const acl_t b)
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struct acl_entry *entrya, *entryb;
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assert(_acl_brand(a) == _acl_brand(b));
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assert(_acl_brand(a) != ACL_BRAND_UNKNOWN);
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assert(_acl_brand(b) != ACL_BRAND_UNKNOWN);
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if (a->ats_acl.acl_cnt != b->ats_acl.acl_cnt)
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return (1);
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@ -363,6 +363,7 @@ int acl_add_perm(acl_permset_t _permset_d, acl_perm_t _perm);
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int acl_calc_mask(acl_t *_acl_p);
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int acl_clear_flags_np(acl_flagset_t _flagset_d);
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int acl_clear_perms(acl_permset_t _permset_d);
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int acl_cmp_np(acl_t _acl1, acl_t _acl2);
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int acl_copy_entry(acl_entry_t _dest_d, acl_entry_t _src_d);
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ssize_t acl_copy_ext(void *_buf_p, acl_t _acl, ssize_t _size);
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acl_t acl_copy_int(const void *_buf_p);
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