1.\" Copyright (c) 2007 Daniel Gerzo <danger@FreeBSD.org> 2.\" All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 13.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23.\" SUCH DAMAGE. 24.Dd October 12, 2020 25.Dt BOOT.CONFIG 5 26.Os 27.Sh NAME 28.Nm boot.config 29.Nd "Configuration file for the boot blocks" 30.Sh DESCRIPTION 31The 32.Nm 33file contains options for the 34.Fx 35boot block code. 36.Pp 37When the 38.Fx 39boot loader runs, it searches the 40.Dq Li a 41slice of the boot partition for a 42.Nm 43file (as a result, slices which are missing an 44.Dq Li a 45partition require user intervention during the boot process). 46If the 47.Nm 48file is found, its contents are used as the default configuration 49options for the boot block code and are echoed to the system console. 50.Pp 51A valid format of this file is to put BIOS drive number, a controller 52type, a unit number, a partition, a kernel file name, and any other 53valid 54.Xr boot 8 55option on a single line, as it is done at the 56.Dq Li "boot:" 57prompt. 58.Pp 59The options related to the boot image selection described below and all 60the other options available for 61.Nm 62are documented in detail in the 63.Xr boot 8 64manual page. 65.Sh FILES 66.Bl -tag -width /boot.config -compact 67.It Pa /boot.config 68parameters for the boot blocks (optional) 69.It Pa /boot/config 70alternate location for boot config information 71.El 72.Sh EXAMPLES 73The command: 74.Bd -literal -offset indent 75# echo "-P" > /boot.config 76.Ed 77.Pp 78will activate the serial console of 79.Fx 80if no keyboard is present, otherwise video console will be used. 81.Pp 82The command: 83.Bd -literal -offset indent 84# echo "1:ad(1,a)/boot/loader" > /boot.config 85.Ed 86.Pp 87will instruct the second stage of 88.Xr boot 8 89on the first disk to boot with the third 90.Xr boot 8 91stage from the second disk. 92.Pp 93The command: 94.Bd -literal -offset indent 95# echo "1:ad(1,a)/boot/loader -P" > /boot.config 96.Ed 97.Pp 98will do both of the above. 99.Sh SEE ALSO 100.Xr boot 8 , 101.Xr loader 8 102.Sh AUTHORS 103This manual page was written by 104.An Daniel Gerzo Aq Mt danger@FreeBSD.org . 105