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libc/posix1e: Add acl_extended_file_np() function.
Reviewed by: kib, debdrup, gbe Approved by: kib Differential Revision: https://reviews.freebsd.org/D28255
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@ -18,6 +18,7 @@ SRCS+= acl_branding.c \
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acl_delete_entry.c \
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acl_entry.c \
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acl_equiv_mode_np.c \
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acl_extended_file_np.c \
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acl_flag.c \
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acl_free.c \
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acl_from_mode_np.c \
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@ -58,6 +59,7 @@ MAN+= acl.3 \
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acl_delete_perm.3 \
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acl_dup.3 \
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acl_equiv_mode_np.3 \
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acl_extended_file_np.3 \
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acl_free.3 \
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acl_from_mode_np.3 \
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acl_from_text.3 \
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@ -98,6 +100,8 @@ MLINKS+=acl_create_entry.3 acl_create_entry_np.3\
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acl_delete.3 acl_delete_file_np.3 \
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acl_delete.3 acl_delete_fd_np.3 \
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acl_delete_entry.3 acl_delete_entry_np.3\
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acl_extended_file_np.3 acl_extended_file_nofollow_np.3 \
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acl_extended_file_np.3 acl_extended_link_np.3 \
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acl_get.3 acl_get_file.3 \
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acl_get.3 acl_get_fd.3 \
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acl_get.3 acl_get_fd_np.3 \
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@ -88,5 +88,8 @@ FBSD_1.1 {
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FBSD_1.7 {
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acl_cmp_np;
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acl_equiv_mode_np;
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acl_extended_file_np;
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acl_extended_file_nofollow_np;
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acl_extended_link_np;
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acl_from_mode_np;
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};
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95
lib/libc/posix1e/acl_extended_file_np.3
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95
lib/libc/posix1e/acl_extended_file_np.3
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@ -0,0 +1,95 @@
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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 February 26, 2021
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.Dt ACL_EXTENDED_FILE_NP 3
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.Os
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.Sh NAME
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.Nm acl_extended_file_np ,
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.Nm acl_extended_file_nofollow_np ,
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.Nm acl_extended_link_np
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.Nd checks if the file has extended ACLs set
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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_extended_file_np "const char* path_p"
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.Ft int
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.Fn acl_extended_file_nofollow_np "const char* path_p"
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.Ft int
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.Fn acl_extended_link_np "const char* path_p"
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.Sh DESCRIPTION
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The
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.Fn acl_extended_file_np
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function is a non-portable call that checks if the file or directory referred to
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by the argument
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.Va path_p
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contains extended access ACLs. The
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.Fn acl_extended_file_nofollow_np
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function works the same way, except it does not follow symlinks. The
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.Fn acl_extended_link_np
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function is a synonim to
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.Fn acl_extended_file_nofollow_np
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named in FreeBSD style.
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An ACL is considered to be extended access one if it contains entries other
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than the three required entries of tag types ACL_USER_OBJ, ACL_GROUP_OBJ and
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ACL_OTHER.
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.Sh RETURN VALUES
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Upon successful completion, this function returns 0 if the file object does not
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contain extended access ACLs and 1 in the other case.
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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_extended_file_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 EACCES
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Search permission is denied for a component of the path prefix.
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.Sh SEE ALSO
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.Xr extattr_get_file 2 ,
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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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85
lib/libc/posix1e/acl_extended_file_np.c
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85
lib/libc/posix1e/acl_extended_file_np.c
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@ -0,0 +1,85 @@
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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_extended_file_np: Check if the file has extended ACLs set.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/errno.h>
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#include <sys/acl.h>
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#include <unistd.h>
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typedef acl_t (*acl_get_func)(const char *, acl_type_t);
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typedef long (*pathconf_func)(const char *, int);
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static int
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_acl_extended_file(acl_get_func f, pathconf_func pathconf_f, const char* path_p);
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int
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acl_extended_file_np(const char *path_p)
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{
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return (_acl_extended_file(acl_get_file, pathconf, path_p));
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}
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int
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acl_extended_file_nofollow_np(const char *path_p)
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{
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return (_acl_extended_file(acl_get_link_np, lpathconf, path_p));
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}
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int
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acl_extended_link_np(const char *path_p)
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{
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return (_acl_extended_file(acl_get_link_np, lpathconf, path_p));
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}
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int
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_acl_extended_file(acl_get_func acl_get, pathconf_func pathconf_f, const char* path_p)
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{
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acl_t acl;
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int retval, istrivial, acltype = ACL_TYPE_ACCESS;
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retval = pathconf_f(path_p, _PC_ACL_NFS4);
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if (retval > 0)
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acltype = ACL_TYPE_NFS4;
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acl = acl_get(path_p, acltype);
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if (acl == NULL)
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return (-1);
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retval = acl_is_trivial_np(acl, &istrivial);
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acl_free(acl);
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if (retval == -1)
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return (-1);
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return (!istrivial);
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}
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@ -379,9 +379,12 @@ int acl_delete_def_link_np(const char *_path_p);
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int acl_delete_flag_np(acl_flagset_t _flagset_d, acl_flag_t _flag);
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int acl_delete_perm(acl_permset_t _permset_d, acl_perm_t _perm);
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acl_t acl_dup(acl_t _acl);
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int acl_equiv_mode_np(acl_t acl, mode_t *mode_p);
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int acl_equiv_mode_np(acl_t _acl, mode_t *_mode_p);
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int acl_extended_file_np(const char* _path_p);
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int acl_extended_file_nofollow_np(const char* _path_p);
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int acl_extended_link_np(const char* _path_p);
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int acl_free(void *_obj_p);
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acl_t acl_from_mode_np(const mode_t mode);
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acl_t acl_from_mode_np(const mode_t _mode);
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acl_t acl_from_text(const char *_buf_p);
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int acl_get_brand_np(acl_t _acl, int *_brand_p);
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int acl_get_entry(acl_t _acl, int _entry_id, acl_entry_t *_entry_p);
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