.\"	$OpenBSD: domountroothooks.9,v 1.3 2007/05/31 19:20:00 jmc Exp $
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.\" Copyright (c) 2001 Niklas Hallqvist.
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.Dd $Mdocdate: May 31 2007 $
.Dt DOMOUNTROOTHOOKS 9
.Os
.Sh NAME
.Nm domountroothooks
.Nd run all mountroot hooks
.Sh SYNOPSIS
.Fd #include <sys/types.h>
.Fd #include <sys/systm.h>
.Ft void
.Fn domountroothooks "void"
.Sh DESCRIPTION
The
.Fn domountroothooks
function invokes all mountroot hooks established using the
.Xr mountroothook_establish 9
function.
Mountroot hooks are called in order, i.e.,
the mountroot hook established first will be called first.
.Pp
This function is called from
.Fn main
with interrupts turned on.
It is called immediately before the system configures its root and swap
devices, but fully after all normal autoconfiguration.
This can be used to let device subsystems needing delayed configuration (e.g.,
due to very long initialization times) still provide the root device.
The
I2O system, implemented by the
.Xr iop 4
and
.Xr ioprbs 4
drivers, is a good example.
.Pp
Mountroot hooks are, like shutdown hooks, implemented via the more general
.Xr dohooks 9
API.
.Sh SEE ALSO
.Xr iop 4 ,
.Xr ioprbs 4 ,
.Xr dohooks 9 ,
.Xr doshutdownhooks 9 ,
.Xr mountroothook_establish 9