Copyright (c) 2001 Chris D. Faulhaber
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
1. Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
2. Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE VOICES IN HIS HEAD BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
$FreeBSD: head/lib/libc/posix1e/acl_get_entry.3 84422 2001-10-03 16:25:08Z bde $
.Dd April 13, 2001 .Dt ACL_GET_ENTRY 3 .Os .Sh NAME .Nm acl_get_entry .Nd retrieve an ACL entry from an ACL .Sh LIBRARY .Lb libc .Sh SYNOPSIS n sys/types.h n sys/acl.h .Ft int .Fn acl_get_entry "acl_t acl" "int entry_id" "acl_entry_t *entry_p" .Sh DESCRIPTION .Fn acl_get_entry is a POSIX.1e call that retrieves a descriptor for an ACL entry specified by the argument .Fa entry_d within the ACL indicated by the argument .Fa acl .
p If the value of .Fa entry_id is .Dv ACL_FIRST_ENTRY , then the function will return in .Fa entry_p a descriptor for the first ACL entry within .Fa acl . If a call is made to .Fn acl_get_entry with .Fa entry_id set to .Dv ACL_NEXT_ENTRY when there has not been either an initial successful call to .Fn acl_get_entry , or a previous successfull call to .Fn acl_create_entry , .Fn acl_delete_entry , .Fn acl_dup , .Fn acl_from_text , .Fn acl_get_fd , .Fn acl_get_file , .Fn acl_set_fd , .Fn acl_set_file , or .Fn acl_valid , then the result is unspecified. .Sh RETURN VALUES If the .Fn acl_get_entry function successfully obtains an ACL entry, a value of 1 is returned. If the ACL has no ACL entries, the .Fn acl_get_entry returns a value of 0. If the value of .Fa entry_id is .Dv ACL_NEXT_ENTRY and the last ACL entry in the ACL has already been returned by a previous call to .Fn acl_get_entry , a value of 0 will be returned until a successful call with .Fa entry_id of .Dv ACL_FIRST_ENTRY is made. Otherwise, a value of -1 will be returned and the global variable .Va errno will be set to indicate the error. .Sh ERRORS The .Fn acl_get_entry fails if: l -tag -width Er t Bq Er EINVAL Argument .Fa acl does not point to a valid ACL. Argument .Fa entry_id is neither .Dv ACL_FIRST_ENTRY nor .Dv ACL_NEXT_ENTRY . .El .Sh SEE ALSO .Xr acl 3 , .Xr acl_calc_mask 3 , .Xr acl_create_entry 3 , .Xr acl_delete_entry 3 , .Xr acl_dup 3 , .Xr acl_from_text 3 , .Xr acl_get_fd 3 , .Xr acl_get_file 3 , .Xr acl_init 3 , .Xr acl_set_fd 3 , .Xr acl_set_file 3 , .Xr acl_valid 3 , .Xr posix1e 3 .Sh STANDARDS POSIX.1e is described in IEEE POSIX.1e draft 17. .Sh HISTORY POSIX.1e support was introduced in .Fx 4.0 . The .Fn acl_get_entry function was added in .Fx 5.0 . .Sh AUTHORS The .Fn acl_get_entry function was written by .An Chris D. Faulhaber Aq jedgar@fxp.org .