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.\"
.\" Copyright (c) 2009 Ulf Lilleengen
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\" notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\" notice, this list of conditions and the following disclaimer in the
.\" documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
.\" SUCH DAMAGE.
.\"
.\" $FreeBSD$
.\"
.Dd July 9, 2009
.Os
.Dt KINFO_GETPROC 3
.Sh NAME
.Nm kinfo_getproc
.Nd function for getting process information from kernel
.Sh LIBRARY
.Lb libutil
.Sh SYNOPSIS
.In sys/types.h
.In libutil.h
.Ft struct kinfo_proc *
.Fn kinfo_getproc "pid_t pid" "int *cntp"
.Sh DESCRIPTION
This function is used for obtaining process information from the kernel.
.Pp
The
.Ar pid
field contains the process identifier.
This should be the a process that you have privilige to access.
This function is a wrapper around
.Xr sysctl 3
with the
.Dv KERN_PROC_PID
mib.
While the kernel returns a packed structure, this function expands the
data into a fixed record format.
.Sh RETURN VALUES
On success the
.Fn kinfo_getproc
function returns a pointer to a
.Vt struct kinfo_proc
structure as defined by
.In sys/user.h .
The pointer was obtained by an internal call to
.Xr malloc 3
and must be freed by the caller with a call to
.Xr free 3 .
On failure the
.Fn kinfo_getproc
function returns
.Dv NULL .
.Sh SEE ALSO
.Xr free 3 ,
.Xr malloc 3 ,
.Xr sysctl 3
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