49a2603d32
- cap.3 describing library interface - cap_*.3 describing specific API calls APIs to follow relatively soon, code to follow later. Obtained from: TrustedBSD Project
108 lines
3.6 KiB
Groff
108 lines
3.6 KiB
Groff
.\"-
|
|
.\" Copyright (c) 2000 Robert N. M. Watson
|
|
.\" 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 CONTRIBUTORS 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.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.\" TrustedBSD Project - support for POSIX.1e process capabilities
|
|
.\"
|
|
.Dd April 1, 2000
|
|
.Dt CAP_DUP 3
|
|
.Os FreeBSD 5.0
|
|
.Sh NAME
|
|
.Nm cap_dup
|
|
.Nd Duplicate a Capability State in Working Storage
|
|
.Sh SYNOPSIS
|
|
.Fd #include <sys/types.h>
|
|
.Fd #include <sys/capability.h>
|
|
.Ft cap_t
|
|
.Fn cap_dup "cap_t cap_p"
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Fn cap_dup
|
|
function returns a duplicate capability state in working storage given the
|
|
source object
|
|
.Ar cap_p ,
|
|
allocating any memory necessary, and returning a pointer to the newly
|
|
created capability state.
|
|
Once duplicated, no operations on the either capability state shall affect
|
|
the other in any way.
|
|
.Pp
|
|
This function may cause memory to be allocated.
|
|
The caller should free any releasable memory, when the capability state in
|
|
working storage is no longer required, by calling
|
|
.Vn cap_free
|
|
with the cap_t as an argument.
|
|
.Sh IMPLEMENTATION NOTES
|
|
FreeBSD's support for POSIX.1e interfaces and features is still under
|
|
development at this time.
|
|
.Sh RETURN VALUES
|
|
Upon successful completion, the
|
|
.Fn cap_dup
|
|
function returns a pointer to the newly created capability state in working
|
|
storage.
|
|
Otherwise, a value of
|
|
.Va (cap_t)NULL
|
|
shall be returned and
|
|
.Va errno
|
|
shall be set to indicate the error.
|
|
.Sh ERRORS
|
|
If any of the following conditions occur, the
|
|
.Fn cap_dup
|
|
function shall return
|
|
.Va (cap_t)NULL
|
|
and set
|
|
.Va errno
|
|
to the corresponding value:
|
|
.Bl -tag -width Er
|
|
.It Bq Er EINVAL
|
|
The value of the
|
|
.Va cap_p
|
|
argument does not refer to a capability state in the working storage.
|
|
.It Bq Er ENOMEM
|
|
The capability state to be returned requires more memory than is allowed by
|
|
the hardware or system-imposed memory management constraints.
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr cap 3 ,
|
|
.Xr cap_free 3 ,
|
|
.Xr posix1e 3
|
|
.Sh STANDARDS
|
|
POSIX.1e is described in IEEE POSIX.1e draft 17. Discussion
|
|
of the draft continues on the cross-platform POSIX.1e implementation
|
|
mailing list. To join this list, see the
|
|
.Fx
|
|
POSIX.1e implementation
|
|
page for more information.
|
|
.Sh HISTORY
|
|
Support for POSIX.1e Capabilities was developed as part of the TrustedBSD
|
|
Project.
|
|
POSIX.1e Capability support was introduced in
|
|
.Fx 5.0 ,
|
|
and development continues.
|
|
.Sh AUTHORS
|
|
.An Robert N M Watson
|
|
.Sh BUGS
|
|
These features are not yet fully implemented.
|