.\"	$OpenBSD: rdconfig.8,v 1.9 2007/05/31 19:20:28 jmc Exp $
.\"	$NetBSD: rdconfig.8,v 1.1.1.1 1995/10/08 22:40:41 gwr Exp $
.\"
.\" Copyright (c) 1995 Gordon W. Ross
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.Dd $Mdocdate: May 31 2007 $
.Dt RDCONFIG 8
.Os
.Sh NAME
.Nm rdconfig
.Nd configure RAM disks
.Sh SYNOPSIS
.Nm rdconfig
.Ar special_file
.Ar 512-byte-blocks
.Sh DESCRIPTION
The
.Nm rdconfig
command configures RAM disk devices.
It will associate the special file
.Ar special_file
with a range of user-virtual memory allocated by the
.Nm rdconfig
process itself.
The
.Nm rdconfig
command should be run in the background.
If successful, the command will not return.
Otherwise, an error message will be printed.
.Pp
To "unconfigure" the ramdisk, just kill the background
.Nm rdconfig
process started earlier.
.Sh FILES
.Bl -tag -width /etc/rrd?? -compact
.It Pa /dev/rrd??
.It Pa /dev/rd??
.El
.Sh EXAMPLES
.Dl # rdconfig /dev/rd0a 2048 &
.Pp
Configures the RAM disk
.Pa rd0a
with one megabyte of user-space memory.
.Sh SEE ALSO
.Xr mount 8 ,
.Xr swapon 8 ,
.Xr umount 8
.Sh BUGS
The special device will become inoperative if the
.Nm rdconfig
process is killed while the special device is open.