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 13, 2001 29.Dt ACL_GET_QUALIFIER 3 30.Os 31.Sh NAME 32.Nm acl_get_qualifier 33.Nd retrieve the qualifier from an ACL entry 34.Sh LIBRARY 35.Lb libc 36.Sh SYNOPSIS 37.In sys/types.h 38.In sys/acl.h 39.Ft void * 40.Fn acl_get_qualifier "acl_entry_t entry_d" 41.Sh DESCRIPTION 42The 43.Fn acl_get_qualifier 44function 45is a POSIX.1e call that retrieves the qualifier of the tag for 46the ACL entry indicated by the argument 47.Fa entry_d 48into working storage and returns a pointer to that storage. 49.Pp 50If the value of the tag type in the ACL entry referred to by 51.Fa entry_d 52is 53.Dv ACL_USER , 54then the value returned by 55.Fn acl_get_qualifier 56will be a pointer to type 57.Vt uid_t . 58.Pp 59If the value of the tag type in 60the ACL entry referred to by 61.Fa entry_d 62is 63.Dv ACL_GROUP , 64then the value returned by 65.Fn acl_get_qualifier 66will be a pointer to type 67.Vt gid_t . 68.Pp 69If the value of the tag type in the ACL entry referred to by 70.Fa entry_d 71is 72.Dv ACL_UNDEFINED_TAG , ACL_USER_OBJ , ACL_GROUP_OBJ , 73.Dv ACL_OTHER , ACL_MASK , 74or an implementation-defined value for which a qualifier 75is not supported, then 76.Fn acl_get_qualifier 77will return a value of 78.Vt ( void * ) Ns Dv NULL 79and the function will fail. 80.Pp 81This function may cause memory to be allocated. 82The caller should 83free any releasable memory, when the new qualifier is no longer 84required, by calling 85.Fn acl_free 86with 87.Vt void * 88as the argument. 89.Sh RETURN VALUES 90The 91.Fn acl_get_qualifier 92function returns a pointer to the allocated storage if successful; 93otherwise a 94.Dv NULL 95pointer is returned and the global variable 96.Va errno 97is set to indicate the error. 98.Sh ERRORS 99The 100.Fn acl_get_qualifier 101fails if: 102.Bl -tag -width Er 103.It Bq Er EINVAL 104Argument 105.Fa entry_d 106does not point to a valid descriptor for an ACL entry. 107The 108value of the tag type in the ACL entry referenced by argument 109.Fa entry_d 110is not 111.Dv ACL_USER 112or 113.Dv ACL_GROUP . 114.It Bq Er ENOMEM 115The value to be returned requires more memory than is allowed 116by the hardware or system-imposed memory management constraints. 117.El 118.Sh SEE ALSO 119.Xr acl 3 , 120.Xr acl_create_entry 3 , 121.Xr acl_free 3 , 122.Xr acl_get_entry 3 , 123.Xr acl_get_tag_type 3 , 124.Xr acl_set_qualifier 3 , 125.Xr acl_set_tag_type 3 , 126.Xr posix1e 3 127.Sh STANDARDS 128POSIX.1e is described in IEEE POSIX.1e draft 17. 129.Sh HISTORY 130POSIX.1e support was introduced in 131.Fx 4.0 . 132The 133.Fn acl_get_qualifier 134function was added in 135.Fx 5.0 . 136.Sh AUTHORS 137The 138.Fn acl_get_qualifier 139function was written by 140.An Chris D. Faulhaber Aq jedgar@fxp.org . 141