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