92 lines
2.8 KiB
Groff
92 lines
2.8 KiB
Groff
.\"
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.\" Copyright (c) 2013 Robert N. M. Watson
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.\" All rights reserved.
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.\"
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.\" This software was developed by SRI International and the University of
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.\" Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
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.\" ("CTSRD"), as part of the DARPA CRASH research programme.
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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 CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.\"
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.Dd August 21, 2013
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.Dt PROCDESC 4
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.Os
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.Sh NAME
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.Nm procdesc
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.Nd process descriptor facility
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.Sh DESCRIPTION
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.Nm
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is a file-descriptor-oriented interface to process signalling and control,
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which supplements historic
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.Ux
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.Xr fork 2 ,
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.Xr kill 2 ,
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and
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.Xr wait4 2
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primitives with
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new system calls such as
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.Xr pdfork 2 ,
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.Xr pdkill 2 ,
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and
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.Xr pdwait4 2 .
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.Nm
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is designed for use with
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.Xr capsicum 4 ,
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replacing process identifiers with capability-oriented references.
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However, it can also be used independently of
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.Xr capsicum 4 ,
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displacing PIDs, which may otherwise suffer from race conditions.
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Given a process descriptor, it is possible to query its conventional PID using
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.Xr pdgetpid 2 .
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.Sh SEE ALSO
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.Xr fork 2 ,
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.Xr kill 2 ,
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.Xr pdfork 2 ,
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.Xr pdgetpid 2 ,
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.Xr pdkill 2 ,
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.Xr pdwait4 2 ,
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.Xr wait4 2 ,
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.Xr capsicum 4
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.Sh HISTORY
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.Nm
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first appeared in
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.Fx 9.0 ,
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and was developed at the University of Cambridge.
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.Sh AUTHORS
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.Nm
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was developed by
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.An -nosplit
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.An "Robert Watson" Aq rwatson@FreeBSD.org
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and
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.An "Jonathan Anderson" Aq jonathan@FreeBSD.org
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at the University of Cambridge, and
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.An "Ben Laurie" Aq benl@FreeBSD.org
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and
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.An "Kris Kennaway" Aq kris@FreeBSD.org
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at Google, Inc.
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.Sh BUGS
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.Nm
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is considered experimental in
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.Fx .
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