744aebe369
before invoking the kernel. Quoting submitter: The issue is with the new boot loader menu. It adds many loader variables including ones that contain ANSI color escapes. Obviously, these ANSI codes don't play well with serial consoles when kenv(1) is executed without arguments (reports vary as to what happens, but it's never pretty). The net-effect is that kenv(1) no longer reports menu-related variables. In essence, kenv(1) output should now appear the same as on RELENG_8 (which lacks the new boot loader and didn't use any such variables). Thus, restoring serial console glory. Submitted by: Devin Teske <devin dott teske fisglobal.com> MFC after: 2 weeks
316 lines
8.3 KiB
Groff
316 lines
8.3 KiB
Groff
.\" Copyright (c) 2011 Devin Teske
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
.\" SUCH DAMAGE.
|
|
.\"
|
|
.\" $FreeBSD$
|
|
.\"
|
|
.Dd Dec 27, 2011
|
|
.Dt MENU.4TH 8
|
|
.Os
|
|
.Sh NAME
|
|
.Nm menu.4th
|
|
.Nd FreeBSD dynamic menu boot module.
|
|
.Sh DESCRIPTION
|
|
The file that goes by the name of
|
|
.Nm
|
|
is a set of commands designed to display a dynamic menu system managed through
|
|
a system of carefully named environment variables.
|
|
The commands of
|
|
.Nm
|
|
by themselves are not enough for most uses.
|
|
Please refer to the
|
|
examples below for the most common situations, and to
|
|
.Xr loader 8
|
|
for additional commands.
|
|
.Pp
|
|
Before using any of the commands provided in
|
|
.Nm ,
|
|
it must be included
|
|
through the command:
|
|
.Pp
|
|
.Dl include menu.4th
|
|
.Pp
|
|
This line is present in the default
|
|
.Pa /boot/menu.rc
|
|
file, so it is not needed (and should not be re-issued) in a normal setup.
|
|
.Pp
|
|
The commands provided by it are:
|
|
.Pp
|
|
.Bl -tag -width disable-module_module -compact -offset indent
|
|
.It Ic menu-init
|
|
Draws the menu bounding box and initializes some internal state variables.
|
|
This should be called before any other menu-related functions.
|
|
.It Ic menu-display
|
|
Displays the menu (configured via the below documented environment variables)
|
|
and blocks on keyboard input, awaiting user action.
|
|
.It Ic menu-erase
|
|
Clears the screen area within the menu bounding box.
|
|
.It Ic menu-redraw
|
|
Calls
|
|
.Ic menu-erase
|
|
and then redraws the menu.
|
|
.It Ic menu-unset
|
|
Unsets the environment variables associated with individual menu items,
|
|
clearing the way for a new menu.
|
|
.It Ic menu-clear
|
|
Calls
|
|
.Ic menu-unset
|
|
and then
|
|
.Ic menu-erase .
|
|
.El
|
|
.Pp
|
|
The environment variables that effect its behavior are:
|
|
.Bl -tag -width bootfile -offset indent
|
|
.It Va loader_color
|
|
If set to
|
|
.Dq Li YES
|
|
(case-insensitive) or
|
|
.Dq Li 1 ,
|
|
causes the menu to be displayed in color wherever possible. This includes the
|
|
use of ANSI bold for numbers appearing to the left of menuitems and the use of
|
|
special
|
|
.Dq Li ansi
|
|
variables describd below.
|
|
.It Va autoboot_delay
|
|
Number of seconds
|
|
.Ic menu-display
|
|
will wait before executing
|
|
.Va menu_timeout_command
|
|
.Ic ( boot
|
|
by default) unless a key is pressed.
|
|
If set to
|
|
.Dq Li NO
|
|
(case-insensitive)
|
|
.Ic menu-display
|
|
will wait for user input and never execute
|
|
.Ic menu_timeout_command .
|
|
If set to
|
|
.Dq Li -1 ,
|
|
.Ic menu-display
|
|
will boot immediately, preventing both interruption of the autoboot process and
|
|
escaping to the loader prompt.
|
|
Default is
|
|
.Dq Li 10 .
|
|
See
|
|
.Xr loader 8
|
|
for additional information.
|
|
.It Va menu_timeout_command
|
|
The command to be executed after
|
|
.Va autoboot_delay
|
|
seconds if a key is not pressed. The default is
|
|
.Ic boot .
|
|
.It Va loader_menu_timeout_x
|
|
Sets the desired column position of the timeout countdown text. Default is 4.
|
|
.It Va loader_menu_timeout_y
|
|
Sets the desired row position of the timeout countdown text. Default is 23.
|
|
.It Va loader_menu_title
|
|
The text to display centered above the menu. Default is
|
|
.Dq Li "Welcome to FreeBSD" .
|
|
.It Va menu_caption[x]
|
|
The text to be displayed for the numbered menuitem
|
|
.Dq Li x .
|
|
.It Va menu_command[x]
|
|
The command to be executed when the number associated with menuitem
|
|
.Dq Li x
|
|
is pressed. See the list of included FICL words below for some ideas.
|
|
.It Va menu_keycode[x]
|
|
An optional decimal ASCII keycode to be associated with menuitem
|
|
.Dq Li x .
|
|
When pressed, will cause the execution of
|
|
.Va menu_command[x] .
|
|
.It Va ansi_caption[x]
|
|
If
|
|
.Va loader_color
|
|
is set, use this caption for menuitem
|
|
.Dq Li x
|
|
instead of
|
|
.Va menu_caption[x] .
|
|
.It Va toggled_text[x]
|
|
For menuitems where
|
|
.Va menu_command[x]
|
|
is set to
|
|
.Dq Li toggle_menuitem
|
|
(or a derivative thereof), the text displayed
|
|
will toggle between this and
|
|
.Va menu_caption[x] .
|
|
.It Va toggled_ansi[x]
|
|
Like
|
|
.Va toggled_text[x]
|
|
except used when
|
|
.Va loader_color
|
|
is enabled.
|
|
.It Va menu_caption[x][y]
|
|
For menuitems where
|
|
.Va menu_command[x]
|
|
is set to
|
|
.Dq Li cycle_menuitem
|
|
(or a derivative thereof), the text displayed will cycle between this and other
|
|
.Va menu_caption[x][y]
|
|
entries.
|
|
.It Va ansi_caption[x][y]
|
|
Like
|
|
.Va menu_caption[x][y]
|
|
except used when
|
|
.Va loader_color
|
|
is enabled.
|
|
.It Va menu_acpi
|
|
When set to a number
|
|
.Dq Li x
|
|
associated with a given menuitem, that menuitem will only appear when
|
|
running on i386-compatible hardware,
|
|
.Va hint.acpi.0.rsdp
|
|
is set (indicating the presence of hardware ACPI support as detected by
|
|
.Xr loader 8 ) ,
|
|
and
|
|
.Va hint.acpi.0.disabled
|
|
is not set.
|
|
On non-i386 hardware, menuitems configured after the
|
|
.Dq Li menu_acpi
|
|
menuitem will use a lower number (to compensate for the missing ACPI menuitem)
|
|
but continue to function as expected.
|
|
On i386-compatible hardware lacking ACPI support (as detected by
|
|
.Xr loader 8 ) ,
|
|
subsequent menuitems will retain their associated numbers.
|
|
.It Va hint.acpi.0.rsdp
|
|
Set automatically by
|
|
.Xr loader 8
|
|
on i386-compatible hardware when ACPI support is detected at boot time.
|
|
Effects the display of the
|
|
.Dq Li menu_acpi
|
|
menuitem (if configured).
|
|
.It Va hint.acpi.0.disabled
|
|
Effects the display of the
|
|
.Va menu_acpi
|
|
menuitem. If set, the menuitem will display
|
|
.Va toggled_text[x]
|
|
.Va ( toggled_ansi[x]
|
|
if
|
|
.Va loader_color
|
|
is set), otherwise
|
|
.Va menu_caption[x]
|
|
.Va ( ansi_caption[x]
|
|
if
|
|
.Va loader_color
|
|
is set).
|
|
.It Va menu_options
|
|
When set to a number
|
|
.Dq Li x ,
|
|
a single blank-line and an
|
|
.Dq Li Options
|
|
header are inserted between
|
|
.Va menu_caption[x-1]
|
|
and
|
|
.Va menu_caption[x]
|
|
(if configured).
|
|
.It Va menu_reboot
|
|
If set, adds a built-in
|
|
.Dq Li Reboot
|
|
menuitem to the end of the last configured menuitem. If
|
|
.Va menu_options
|
|
is configured, the
|
|
.Dq Li Reboot
|
|
menuitem will be inserted before the
|
|
.Dq Options
|
|
separator.
|
|
.El
|
|
.Pp
|
|
In addition, it provides the following FICL words:
|
|
.Pp
|
|
.Bl -tag -width disable-module_module -compact -offset indent
|
|
.It Ic arch-i386? ( -- BOOL )
|
|
Returns true (-1) on i386 and false (0) otherwise.
|
|
.It Ic acpipresent? ( -- BOOL )
|
|
Returns true (-1) if ACPI is present and false (0) otherwise.
|
|
.It Ic acpienabled? ( -- BOOL )
|
|
Returns true (-1) if ACPI is enabled and false (0) otherwise.
|
|
.It Ic toggle_menuitem ( N -- N )
|
|
Toggles menuitem
|
|
.Dq Li N
|
|
between
|
|
.Va menu_caption[x]
|
|
and
|
|
.Va toggled_text[x]
|
|
(where
|
|
.Dq Li N
|
|
represents the ASCII decimal value for
|
|
.Dq Li x ) .
|
|
.It Ic cycle_menuitem ( N -- N )
|
|
Cycles menuitem
|
|
.Dq Li N
|
|
between
|
|
.Va menu_caption[x][y]
|
|
entries (where
|
|
.Va N
|
|
represents the ASCII decimal value for
|
|
.Va x ) .
|
|
.El
|
|
.Pp
|
|
For all values of
|
|
.Dq Li x
|
|
above, use any number between 1 through 9. Sorry, double-digits are not
|
|
currently supported.
|
|
.Sh FILES
|
|
.Bl -tag -width /boot/loader.4th -compact
|
|
.It Pa /boot/loader
|
|
The
|
|
.Xr loader 8 .
|
|
.It Pa /boot/menu.4th
|
|
.Nm
|
|
itself.
|
|
.It Pa /boot/loader.rc
|
|
.Xr loader 8
|
|
bootstrapping script.
|
|
.El
|
|
.Sh EXAMPLES
|
|
A simple boot menu:
|
|
.Pp
|
|
.Bd -literal -offset indent -compact
|
|
include /boot/menu.4th
|
|
menu-init
|
|
set menu_caption[1]="Boot"
|
|
set menu_command[1]="boot"
|
|
set menu_options=2
|
|
set menu_caption[2]="Option: NO"
|
|
set toggled_text[2]="Option: YES"
|
|
set menu_command[2]="toggle_menuitem"
|
|
set menu_timeout_command="boot"
|
|
set menu_reboot
|
|
menu-display
|
|
.Ed
|
|
.Sh SEE ALSO
|
|
.Xr loader.conf 5 ,
|
|
.Xr loader 8 ,
|
|
.Xr loader.4th 8 ,
|
|
.Xr beastie.4th 8
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
set of commands first appeared in
|
|
.Fx 9.0 .
|
|
.Sh AUTHORS
|
|
The
|
|
.Nm
|
|
set of commands was written by
|
|
.An -nosplit
|
|
.An Devin Teske Aq devinteske@hotmail.com .
|