.\" $NetBSD: proc_find.9,v 1.1 2010/07/01 14:54:44 jruoho Exp $
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.\" by Jukka Ruohonen.
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.Dd July 1, 2010
.Dt PROC_FIND 9
.Os
.Sh NAME
.Nm proc_find ,
.Nm pgrp_find
.Nd find process or process group
.Sh SYNOPSIS
.In sys/proc.h
.Ft struct proc *
.Fn proc_find "pid_t pid"
.Ft struct pgrp *
.Fn pgrp_find "pid_t pgid"
.Pp
.Va extern kmutex_t *proc_lock;
.Sh DESCRIPTION
The
.Fn proc_find
and
.Fn pgrp_find
functions retrieve process and process group structures from process
.Tn ID
.Fa pid
and process group
.Tn ID
.Fa pgid .
Both functions must be called by holding a
.Xr mutex 9
on
.Va proc_lock .
.Sh RETURN VALUES
Upon successful completion, the described functions return a pointer to either
.Em struct proc
or
.Em struct pgrp .
Otherwise, if the requested
.Tn ID
was not found,
.Dv NULL
is returned.
.Sh SEE ALSO
.Xr curproc 9