d81d5b2f2c
Reviewed by: kib, debdrup, gbe Approved by: kib Differential Revision: https://reviews.freebsd.org/D28255
96 lines
3.0 KiB
Groff
96 lines
3.0 KiB
Groff
.\"-
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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_EQUIV_MODE_NP 3
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.Os
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.Sh NAME
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.Nm acl_equiv_mode_np
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.Nd check if ACL can be represented as UNIX permissions
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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_equiv_mode_np "acl_t acl" "mode_t* mode_p"
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.Sh DESCRIPTION
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The
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.Fn acl_equiv_mode_np
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function is a non-portable call which checks that entries contained in the
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.Va acl
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argument use only the ACL_USER_OBJ, ACL_GROUP_OBJ, and ACL_OTHER tag types, and that
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permissions contained in these entries consist only of ACL_READ, ACL_WRITE and
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ACL_EXECUTE.
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If the check succeeds, the ACL can be represented as traditional UNIX
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file permissions bits set.
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.Pp
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If
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.Va mode_p
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is not NULL and the check succeeds, the function fills the argument with a mode
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value corresponding to permissions contained in the ACL.
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.Sh RETURN VALUES
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Upon successful completion, the function returns 0 if the ACL can be represented
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as UNIX permissions and 1 if it is not possible.
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Otherwise, a value
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of
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.Va -1
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is returned, and
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.Va errno
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is set to indicate 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_equiv_mode_np
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function returns 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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Argument
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.Fa acl
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does not point to a valid ACL.
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.El
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.Sh SEE ALSO
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.Xr acl 3 ,
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.Xr acl_from_mode_np 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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