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.Dd March 10, 2001 27.Dt ACL_CALC_MASK 3 28.Os 29.Sh NAME 30.Nm acl_calc_mask 31.Nd calculate and set ACL mask permissions 32.Sh LIBRARY 33.Lb libc 34.Sh SYNOPSIS 35.In sys/types.h 36.In sys/acl.h 37.Ft int 38.Fn acl_calc_mask "acl_t *acl_p" 39.Sh DESCRIPTION 40The 41.Fn acl_calc_mask 42function 43is a POSIX.1e call that calculates and set the permissions 44associated with the 45.Dv ACL_MASK 46ACL entry of the ACL referred to by 47.Fa acl_p . 48.Pp 49The value of new permissions are the union of the permissions 50granted by the 51.Dv ACL_GROUP , ACL_GROUP_OBJ , ACL_USER 52tag types which 53match processes in the file group class contained in the ACL 54referred to by 55.Fa acl_p . 56.Pp 57If the ACL referred to by 58.Fa acl_p 59already contains an 60.Dv ACL_MASK 61entry, its permissions shall be 62overwritten; if it does not contain an 63.Dv ACL_MASK 64entry, one shall 65be added. 66.Sh RETURN VALUES 67.Rv -std acl_calc_mask 68.Sh ERRORS 69The 70.Fn acl_calc_mask 71function fails if: 72.Bl -tag -width Er 73.It Bq Er EINVAL 74Argument 75.Fa acl_p 76does not point to a pointer to a valid ACL. 77.El 78.Sh SEE ALSO 79.Xr acl 3 , 80.Xr acl_get_entry 3 , 81.Xr acl_valid 3 , 82.Xr posix1e 3 83.Sh STANDARDS 84POSIX.1e is described in IEEE POSIX.1e draft 17. 85.Sh HISTORY 86POSIX.1e support was introduced in 87.Fx 4.0 . 88The 89.Fn acl_calc_mask 90function was added in 91.Fx 5.0 . 92.Sh AUTHORS 93The 94.Fn acl_calc_mask 95function was written by 96.An Chris D. Faulhaber Aq Mt jedgar@fxp.org . 97