.\"	$NetBSD: mdsetimage.8,v 1.12 2016/09/21 16:25:41 christos Exp $
.\"
.\" Copyright (c) 1996 Christopher G. Demetriou
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.\" <<Id: LICENSE_GC,v 1.1 2001/10/01 23:24:05 cgd Exp>>
.\"
.Dd September 21, 2016
.Dt MDSETIMAGE 8
.Os
.Sh NAME
.Nm mdsetimage
.Nd set kernel RAM disk image
.Sh SYNOPSIS
.Nm
.Op Fl svx
.Op Fl b Ar bfdname
.Op Fl I Ar image_symbol
.Op Fl S Ar size_symbol
.Op Fl T Ar address
.Ar kernel
.Ar image
.Sh DESCRIPTION
The
.Nm
command copies the disk image specified by
.Ar image
into the memory disk storage area in
.Ar kernel .
The file system present in
.Ar image
will typically be used by the kernel
as the root file system.
.Pp
To recognize kernel executable format, the
.Fl b
flag specifies BFD name of kernel.
.Pp
The
.Fl I
and
.Fl S
flags specify the symbol names of image and size of memory disk
drivers respectively.
.Pp
For a.out kernels only, the
.Fl T
flag specifies the starting address of kernel text.
This flag is ignored for other kernel executable formats.
.Pp
If the
.Fl s
flags is given,
.Nm
will write back the actual disk image size back into
.Ar kernel .
.Pp
If the
.Fl v
flag is given,
.Nm
will print out status information as
it is copying the image.
.Pp
If the
.Fl x
flag is given,
.Nm
will extract the disk image from
.Ar kernel
into the file
.Ar image .
This is the opposite of the default behavior.
.Sh SEE ALSO
.Xr md 4 ,
.Xr mdconfig 8