2001-04-24 22:45:41 +00:00
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.\"-
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.\" Copyright (c) 2001 Chris D. Faulhaber
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR THE VOICES IN HIS HEAD BE
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.\" LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd April 13, 2001
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.Dt ACL_GET_ENTRY 3
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.Os
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.Sh NAME
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.Nm acl_get_entry
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.Nd retrieve an ACL entry from an ACL
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.Sh LIBRARY
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.Lb libc
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.Sh SYNOPSIS
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.Fd #include <sys/types.h>
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.Fd #include <sys/acl.h>
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.Ft void *
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2001-05-07 23:16:25 +00:00
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.Fn acl_get_entry "acl_t acl" "int entry_id" "acl_entry_t *entry_p"
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.Sh DESCRIPTION
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.Fn acl_get_entry
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is a POSIX.1e call that retrieves a descriptor for an ACL entry
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specified by the argument
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.Fa entry_d
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within the ACL indicated by the argument
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.Fa acl .
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.Pp
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If the value of
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.Fa entry_id
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is
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.Dv ACL_FIRST_ENTRY ,
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then the function will return in
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.Fa entry_p
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a descriptor for the first ACL entry within
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.Fa acl .
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If a call is made to
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.Fn acl_get_entry
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with
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.Fa entry_id
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set to
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.Dv ACL_NEXT_ENTRY
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when there has not been either an initial successful call to
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.Fn acl_get_entry ,
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or a previous successfull call to
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.Fn acl_create_entry ,
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.Fn acl_delete_entry ,
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.Fn acl_dup ,
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.Fn acl_from_text ,
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.Fn acl_get_fd ,
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.Fn acl_get_file ,
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.Fn acl_set_fd ,
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.Fn acl_set_file ,
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or
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.Fn acl_valid ,
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then the result is unspecified.
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.Sh RETURN VALUES
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If the
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.Fn acl_get_entry
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function successfully obtains an ACL entry, a value of 1 is returned.
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If the ACL has no ACL entries, the
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2001-05-16 09:50:12 +00:00
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.Fn acl_get_entry
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returns a value of 0. If the value of
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.Fa entry_id
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is
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.Dv ACL_NEXT_ENTRY
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and the last ACL entry in the ACL has already been returned by a
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previous call to
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.Fn acl_get_entry ,
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a value of 0 will be returned until a successful call with
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.Fa entry_id
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of
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.Dv ACL_FIRST_ENTRY
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is made. Otherwise, a value of -1 will be returned and
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2001-05-16 09:50:12 +00:00
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the global variable
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.Va errno
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will be set to indicate the error.
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.Sh ERRORS
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The
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.Fn acl_get_entry
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fails if:
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.Bl -tag -width Er
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.It Bq Er EINVAL
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Argument
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.Fa acl
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does not point to a valid ACL. Argument
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.Fa entry_id
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is neither
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.Dv ACL_FIRST_ENTRY
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nor
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.Dv ACL_NEXT_ENTRY .
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2001-05-16 09:50:12 +00:00
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.El
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2001-04-24 22:45:41 +00:00
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.Sh SEE ALSO
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.Xr acl 3 ,
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.Xr acl_calc_mask 3 ,
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.Xr acl_create_entry 3 ,
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.Xr acl_delete_entry 3 ,
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.Xr acl_dup 3 ,
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.Xr acl_from_text 3 ,
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.Xr acl_get_fd 3 ,
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.Xr acl_get_file 3 ,
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.Xr acl_init 3 ,
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.Xr acl_set_fd 3 ,
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.Xr acl_set_file 3 ,
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.Xr acl_valid 3 ,
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.Xr posix1e 3
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.Sh STANDARDS
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POSIX.1e is described in IEEE POSIX.1e draft 17.
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.Sh HISTORY
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POSIX.1e support was introduced in
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.Fx 4.0 .
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The
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.Fn acl_get_entry
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function was added in
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.Fx 5.0 .
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.Sh AUTHORS
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The
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.Fn acl_get_entry
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function was written by
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.An Chris D. Faulhaber Aq jedgar@fxp.org .
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