.\"	$OpenBSD: tfind.9,v 1.1 2017/01/24 00:58:55 mpi Exp $
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.\" Copyright (c) 1999 Marc Espie
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.Dd $Mdocdate: January 24 2017 $
.Dt TFIND 9
.Os
.Sh NAME
.Nm tfind ,
.Nm prfind ,
.Nm pgfind
.Nd find thread, process and process group by number
.Sh SYNOPSIS
.In sys/types.h
.In sys/signal.h
.In sys/proc.h
.Ft "struct proc *"
.Fn tfind "pid_t tid"
.Ft "struct process *"
.Fn prfind "pid_t pid"
.Ft "struct pgrp *"
.Fn pgfind "pid_t pgid"
.Sh DESCRIPTION
The
.Fn tfind ,
.Fn prfind ,
and
.Fn pgfind
functions retrieve thread, process and progress group structures from thread,
process and process group IDs, respectively.
.Pp
These functions return
.Dv NULL
if the requested ID can't be found.
.Sh CODE REFERENCES
Those functions are implemented in the file
.Pa sys/kern/kern_proc.c .