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99 lines
2.7 KiB
Groff
99 lines
2.7 KiB
Groff
.\"-
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.\" Copyright (c) 2001 Chris D. Faulhaber
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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 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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.\" $FreeBSD$
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.\"
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.Dd March 10, 2001
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.Dt ACL_CALC_MASK 3
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.Os
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.Sh NAME
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.Nm acl_calc_mask
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.Nd calculate and set ACL mask 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_calc_mask "acl_t *acl_p"
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.Sh DESCRIPTION
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The
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.Fn acl_calc_mask
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function
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is a POSIX.1e call that calculates and set the permissions
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associated with the
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.Dv ACL_MASK
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ACL entry of the ACL referred to by
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.Fa acl_p .
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.Pp
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The value of new permissions are the union of the permissions
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granted by the
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.Dv ACL_GROUP , ACL_GROUP_OBJ , ACL_USER
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tag types which
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match processes in the file group class contained in the ACL
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referred to by
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.Fa acl_p .
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.Pp
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If the ACL referred to by
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.Fa acl_p
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already contains an
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.Dv ACL_MASK
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entry, its permissions shall be
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overwritten; if it does not contain an
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.Dv ACL_MASK
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entry, one shall
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be added.
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.Sh RETURN VALUES
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.Rv -std acl_calc_mask
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.Sh ERRORS
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The
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.Fn acl_calc_mask
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function fails if:
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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_p
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does not point to a pointer 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_get_entry 3 ,
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.Xr acl_valid 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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.Sh HISTORY
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POSIX.1e support was introduced in
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.Fx 4.0 .
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The
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.Fn acl_calc_mask
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function was added in
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.Fx 5.0 .
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.Sh AUTHORS
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The
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.Fn acl_calc_mask
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function was written by
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.An Chris D. Faulhaber Aq jedgar@fxp.org .
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