4bf60dfaf8
acl_add_perm, acl_clear_perms, acl_copy_entry, acl_create_entry, acl_delete_perm, acl_get_permset, acl_get_qualifier, acl_get_tag_type, acl_set_permset, acl_set_qualifier, acl_set_tag_type This brings us within 4 functions of a full ACL editing library. Reviewed by: rwatson
125 lines
3.8 KiB
Groff
125 lines
3.8 KiB
Groff
.\"-
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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 March 13, 2001
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.Dt ACL_GET_QUALIFIER 3
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.Os
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.Sh NAME
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.Nm acl_get_qualifier
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.Nd Retrieve the qualifier from an ACL entry
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.Sh LIBRARY
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.Lb libposix1e
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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 int
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.Fn acl_get_qualifier "acl_entry_t entry_d"
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.Sh DESCRIPTION
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.Fn acl_get_qualifier
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is a POSIX.1e call that retrieves the qualifier of the tag for
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the ACL entry indicated by the argument
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.Ar entry_d
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into working storage and returns a pointer to that storage.
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.Pp
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If the value of the tag type in the ACL entry referred to by
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.Ar entry_d
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is ACL_USER, then the value returned by
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.Fn acl_get_qualifier
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will be a pointer to type uid_t.
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.Pp
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If the value of the tag type in
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the ACL entry referred to by
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.Ar entry_d
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is ACL_GROUP, then the value returned by
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.Fn acl_get_qualifier
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will be a pointer to type gid_t.
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.Pp
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If the value of the tag type in the ACL enty referred to by
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.Ar entry_d
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is ACL_UNDEFINED_TAG, ACL_USER_OBJ, ACL_GROUP_OBJ, ACL_OTHER,
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ACL_MASK, or an implementation-defined value for which a qualifier
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is not supported, then
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.Fn acl_get_qualifier
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will return a valid of (void *)NULL and the function will fail.
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.Pp
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This function may cause memory to be allocated. The caller should
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free any releasable memory, when the new qualifier is no longer
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required, by calling
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.Fn acl_free
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with void* as the argument.
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.Sh RETURN VALUES
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Upon successful completion, the function will return a value of
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.Va 0 .
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Otherwise, a value of
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.Va -1
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will be returned, and
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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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If any of the following conditions occur, the
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.Fn acl_get_qualifier
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function will return a value of
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.Va (void *)NULL
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and set
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.Va errno
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to the corresponding value:
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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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.Ar entry_d
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does not point to a valid descriptor for an ACL entry. The
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value of the tag type in the ACL entry referenced by argument
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.Ar entry_d
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is not ACL_USER or ACL_GROUP.
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.It Bq Er ENOMEM
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The value to be returned requires more memory than is allowed
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by the hardware or system-imposed memory management constraints.
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.El
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.Sh SEE ALSO
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.Xr acl 3 ,
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.Xr acl_create_entry 3 ,
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.Xr acl_free 3 ,
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.Xr acl_get_entry 3 ,
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.Xr acl_get_tag_type 3 ,
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.Xr acl_set_qualifier 3 ,
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.Xr acl_set_tag_type 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_qualifier
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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_qualifier
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function was written by
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.An Chris D. Faulhaber Aq jedgar@fxp.org .
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