Copyright (c) 2013 Robert N. M. Watson
All rights reserved.

This software was developed by SRI International and the University of
Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
("CTSRD"), as part of the DARPA CRASH research programme.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
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notice, this list of conditions and the following disclaimer.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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$FreeBSD$

.Dd July 25, 2015 .Dt PROCDESC 4 .Os .Sh NAME .Nm procdesc .Nd process descriptor facility .Sh SYNOPSIS .Cd "options PROCDESC" .Sh DESCRIPTION .Nm is a file-descriptor-oriented interface to process signalling and control, which supplements historic x .Xr fork 2 , .Xr kill 2 , and .Xr wait4 2 primitives with new system calls such as .Xr pdfork 2 , .Xr pdkill 2 , and .Xr pdwait4 2 . .Nm is designed for use with .Xr capsicum 4 , replacing process identifiers with capability-oriented references. However, it can also be used independently of .Xr capsicum 4 , displacing PIDs, which may otherwise suffer from race conditions. Given a process descriptor, it is possible to query its conventional PID using .Xr pdgetpid 2 . .Sh SEE ALSO .Xr fork 2 , .Xr kill 2 , .Xr wait4 2 , .Xr pdfork 2 , .Xr pdgetpid 2 , .Xr pdkill 2 , .Xr pdwait4 2 , .Xr capsicum 4 .Sh HISTORY .Nm first appeared in .Fx 9.0 , and was developed at the University of Cambridge. .Sh AUTHORS .Nm was developed by .An -nosplit .An "Robert Watson" Aq rwatson@FreeBSD.org and .An "Jonathan Anderson" Aq jonathan@FreeBSD.org at the University of Cambridge, and .An "Ben Laurie" Aq benl@FreeBSD.org and .An "Kris Kennaway" Aq kris@FreeBSD.org at Google, Inc.