xref: /freebsd/share/man/man4/procdesc.4 (revision 0957b409)
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30.\" $FreeBSD$
31.\"
32.Dd October 14, 2018
33.Dt PROCDESC 4
34.Os
35.Sh NAME
36.Nm procdesc
37.Nd process descriptor facility
38.Sh DESCRIPTION
39.Nm
40is a file-descriptor-oriented interface to process signalling and control,
41which supplements historic
42.Ux
43.Xr fork 2 ,
44.Xr kill 2 ,
45and
46.Xr wait4 2
47primitives with
48new system calls such as
49.Xr pdfork 2 ,
50.Xr pdkill 2 ,
51and
52.Xr pdwait4 2 .
53.Nm
54is designed for use with
55.Xr capsicum 4 ,
56replacing process identifiers with capability-oriented references.
57However, it can also be used independently of
58.Xr capsicum 4 ,
59displacing PIDs, which may otherwise suffer from race conditions.
60Given a process descriptor, it is possible to query its conventional PID using
61.Xr pdgetpid 2 .
62.Sh SEE ALSO
63.Xr fork 2 ,
64.Xr kill 2 ,
65.Xr pdfork 2 ,
66.Xr pdgetpid 2 ,
67.Xr pdkill 2 ,
68.Xr pdwait4 2 ,
69.Xr kqueue 2 ,
70.Xr wait4 2 ,
71.Xr capsicum 4
72.Sh HISTORY
73.Nm
74first appeared in
75.Fx 9.0 ,
76and was developed at the University of Cambridge.
77.Sh AUTHORS
78.Nm
79was developed by
80.An -nosplit
81.An Robert Watson Aq Mt rwatson@FreeBSD.org
82and
83.An Jonathan Anderson Aq Mt jonathan@FreeBSD.org
84at the University of Cambridge, and
85.An Ben Laurie Aq Mt benl@FreeBSD.org
86and
87.An Kris Kennaway Aq Mt kris@FreeBSD.org
88at Google, Inc.
89