107 lines
3.1 KiB
Groff
107 lines
3.1 KiB
Groff
.\" Copyright (c) 2007 Daniel Gerzo <danger@FreeBSD.org>
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.\" All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" $FreeBSD$
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.Dd October 12, 2020
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.Dt BOOT.CONFIG 5
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.Os
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.Sh NAME
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.Nm boot.config
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.Nd "Configuration file for the boot blocks"
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.Sh DESCRIPTION
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The
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.Nm
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file contains options for the
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.Fx
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boot block code.
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.Pp
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When the
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.Fx
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boot loader runs, it searches the
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.Dq Li a
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slice of the boot partition for a
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.Nm
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file (as a result, slices which are missing an
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.Dq Li a
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partition require user intervention during the boot process).
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If the
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.Nm
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file is found, its contents are used as the default configuration
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options for the boot block code and are echoed to the system console.
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.Pp
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A valid format of this file is to put BIOS drive number, a controller
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type, a unit number, a partition, a kernel file name, and any other
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valid
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.Xr boot 8
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option on a single line, as it is done at the
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.Dq Li "boot:"
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prompt.
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.Pp
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The options related to the boot image selection described below and all
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the other options available for
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.Nm
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are documented in detail in the
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.Xr boot 8
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manual page.
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.Sh FILES
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.Bl -tag -width /boot.config -compact
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.It Pa /boot.config
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parameters for the boot blocks (optional)
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.It Pa /boot/config
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alternate location for boot config information
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.El
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.Sh EXAMPLES
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The command:
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.Bd -literal -offset indent
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# echo "-P" > /boot.config
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.Ed
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.Pp
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will activate the serial console of
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.Fx
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if no keyboard is present, otherwise video console will be used.
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.Pp
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The command:
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.Bd -literal -offset indent
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# echo "1:ad(1,a)/boot/loader" > /boot.config
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.Ed
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.Pp
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will instruct the second stage of
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.Xr boot 8
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on the first disk to boot with the third
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.Xr boot 8
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stage from the second disk.
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.Pp
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The command:
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.Bd -literal -offset indent
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# echo "1:ad(1,a)/boot/loader -P" > /boot.config
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.Ed
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.Pp
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will do both of the above.
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.Sh SEE ALSO
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.Xr boot 8 ,
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.Xr loader 8
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.Sh AUTHORS
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This manual page was written by
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.An Daniel Gerzo Aq Mt danger@FreeBSD.org .
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