NAME

     procdesc — process descriptor facility

DESCRIPTION

     procdesc is a file-descriptor-oriented interface to process signalling and control, which
     supplements historic UNIX fork(2), kill(2), and wait4(2) primitives with new system calls
     such as pdfork(2), pdkill(2), and pdwait4(2).  procdesc is designed for use with
     capsicum(4), replacing process identifiers with capability-oriented references.  However, it
     can also be used independently of capsicum(4), displacing PIDs, which may otherwise suffer
     from race conditions.  Given a process descriptor, it is possible to query its conventional
     PID using pdgetpid(2).

SEE ALSO

     fork(2), kill(2), pdfork(2), pdgetpid(2), pdkill(2), pdwait4(2), kqueue(2), wait4(2),
     capsicum(4)

HISTORY

     procdesc first appeared in FreeBSD 9.0, and was developed at the University of Cambridge.

AUTHORS

     procdesc was developed by Robert Watson <rwatson@FreeBSD.org> and Jonathan Anderson
     <jonathan@FreeBSD.org> at the University of Cambridge, and Ben Laurie <benl@FreeBSD.org> and
     Kris Kennaway <kris@FreeBSD.org> at Google, Inc.