1.\" $NetBSD: acl_calc_mask.3,v 1.2 2020/06/18 19:46:34 wiz Exp $ 2.\"- 3.\" Copyright (c) 2001 Chris D. Faulhaber 4.\" All rights reserved. 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 1. Redistributions of source code must retain the above copyright 10.\" notice, this list of conditions and the following disclaimer. 11.\" 2. Redistributions in binary form must reproduce the above copyright 12.\" notice, this list of conditions and the following disclaimer in the 13.\" documentation and/or other materials provided with the distribution. 14.\" 15.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 16.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18.\" ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE 19.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25.\" SUCH DAMAGE. 26.\" 27.\" $FreeBSD: head/lib/libc/posix1e/acl_calc_mask.3 267774 2014-06-23 08:25:03Z bapt $ 28.\" 29.Dd March 10, 2001 30.Dt ACL_CALC_MASK 3 31.Os 32.Sh NAME 33.Nm acl_calc_mask 34.Nd calculate and set ACL mask permissions 35.Sh LIBRARY 36.Lb libc 37.Sh SYNOPSIS 38.In sys/types.h 39.In sys/acl.h 40.Ft int 41.Fn acl_calc_mask "acl_t *acl_p" 42.Sh DESCRIPTION 43The 44.Fn acl_calc_mask 45function 46is a POSIX.1e call that calculates and set the permissions 47associated with the 48.Dv ACL_MASK 49ACL entry of the ACL referred to by 50.Fa acl_p . 51.Pp 52The value of new permissions are the union of the permissions 53granted by the 54.Dv ACL_GROUP , ACL_GROUP_OBJ , ACL_USER 55tag types which 56match processes in the file group class contained in the ACL 57referred to by 58.Fa acl_p . 59.Pp 60If the ACL referred to by 61.Fa acl_p 62already contains an 63.Dv ACL_MASK 64entry, its permissions shall be 65overwritten; if it does not contain an 66.Dv ACL_MASK 67entry, one shall 68be added. 69.Sh RETURN VALUES 70.Rv -std acl_calc_mask 71.Sh ERRORS 72The 73.Fn acl_calc_mask 74function fails if: 75.Bl -tag -width Er 76.It Bq Er EINVAL 77Argument 78.Fa acl_p 79does not point to a pointer to a valid ACL. 80.El 81.Sh SEE ALSO 82.Xr acl 3 , 83.Xr acl_get_entry 3 , 84.Xr acl_valid 3 , 85.Xr posix1e 3 86.Sh STANDARDS 87POSIX.1e is described in IEEE POSIX.1e draft 17. 88.Sh HISTORY 89POSIX.1e support was introduced in 90.Fx 4.0 . 91The 92.Fn acl_calc_mask 93function was added in 94.Fx 5.0 . 95.Sh AUTHORS 96The 97.Fn acl_calc_mask 98function was written by 99.An Chris D. Faulhaber Aq Mt jedgar@fxp.org . 100