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There are two menu systems included with SYSLINUX, the advanced menu
system, and the simple menu system.
+++ THE ADVANCED MENU SYSTEM +++
The advanced menu system, written by Murali Krishnan Ganapathy, is
located in the menu/ subdirectly. It allows the user to create
hierarchial submenus, dynamic options, checkboxes, and just about
anything you want. It requires that the menu is compiled from a
simple C file, see menu/simple.c and menu/complex.c for examples.
The advanced menu system doesn't support serial console at this time.
See menu/README for more information.
+++ THE SIMPLE MENU SYSTEM +++
The simple menu system is a single module located at
com32/modules/vesamenu.c32 (graphical) or com32/modules/menu.c32 (text
mode only). It uses the same configuration file as the regular
SYSLINUX command line, and displays all the LABEL statements.
To use the menu system, simply make sure [vesa]menu.c32 is in the
appropriate location for your boot medium (the same directory as the
configuration file for SYSLINUX, EXTLINUX and ISOLINUX, and the same
directory as pxelinux.0 for PXELINUX), and put the following options
in your configuration file:
DEFAULT menu.c32
PROMPT 0
There are a few menu additions to the command line, all starting with
the keyword MENU; like the rest of the SYSLINUX config file
language, it is case insensitive:
MENU TITLE title
Give the menu a title. The title is presented at the top of
the menu.
MENU LABEL label
(Only valid after a LABEL statement.)
Changes the label displayed for a specific entry. This allows
you to have a label that isn't suitable for the command line,
for example:
# Soft Cap Linux
LABEL softcap
MENU LABEL Soft Cap ^Linux 9.6.36
KERNEL softcap-9.6.36.bzi
APPEND whatever
# A very dense operating system
LABEL brick
MENU LABEL ^Windows CE/ME/NT
KERNEL chain.c32
APPEND hd0 2
The ^ symbol in a MENU LABEL statement defines a hotkey.
The hotkey will be highlighted in the menu and will move the
menu cursor immediately to that entry.
Reusing hotkeys is disallowed, subsequent entries will not be
highlighted, and will not work.
Keep in mind that the LABELs, not MENU LABELs, must be unique,
or odd things will happen to the command-line.
MENU HIDE
(Only valid after a LABEL statement.)
Suppresses a particular LABEL entry from the menu.
MENU DEFAULT
(Only valid after a LABEL statement.)
Indicates that this entry should be the default. If no
default is specified, use the first one.
MENU PASSWD passwd
(Only valid after a LABEL statement.)
Sets a password on this menu entry. "passwd" can be either a
cleartext password or a SHA-1 encrypted password; use the
included Perl script "sha1pass" to encrypt passwords.
(Obviously, if you don't encrypt your passwords they will not
be very secure at all.)
If you are using passwords, you want to make sure you also use
the settings "NOESCAPE 1", "PROMPT 0", and either set
"ALLOWOPTIONS 0" or use a master password (see below.)
If passwd is an empty string, this menu entry can only be
unlocked with the master password.
MENU MASTER PASSWD passwd
Sets a master password. This password can be used to boot any
menu entry, and is required for the [Tab] and [Esc] keys to
work.
MENU BACKGROUND filename
For vesamenu.c32, sets the background image. The image should
be 640x480 pixels and either in PNG or JPEG format.
MENU INCLUDE filename
Include the contents of the configuration file filename at
this point. Keep in mind that the included data is only seen
by the menu system; the core syslinux code does not parse this
command, so any labels defined in it are unavailable.
MENU COLOR element ansi foreground background shadow
Sets the color of element "element" to the specified color
sequence:
screen Rest of the screen
border Border area
title Title bar
unsel Unselected menu item
hotkey Unselected hotkey
sel Selection bar
hotsel Selected hotkey
scrollbar Scroll bar
tabmsg Press [Tab] message
cmdmark Command line marker
cmdline Command line
pwdborder Password box border
pwdheader Password box header
pwdentry Password box contents
timeout_msg Timeout message
timeout Timeout counter
"ansi" is a sequence of semicolon-separated ECMA-48 Set
Graphics Rendition (<ESC>[m) sequences:
0 reset all attributes to their defaults
1 set bold
4 set underscore (simulated with color on a color display)
5 set blink
7 set reverse video
22 set normal intensity
24 underline off
25 blink off
27 reverse video off
30 set black foreground
31 set red foreground
32 set green foreground
33 set brown foreground
34 set blue foreground
35 set magenta foreground
36 set cyan foreground
37 set white foreground
38 set underscore on, set default foreground color
39 set underscore off, set default foreground color
40 set black background
41 set red background
42 set green background
43 set brown background
44 set blue background
45 set magenta background
46 set cyan background
47 set white background
49 set default background color
These are used (a) in text mode, and (b) on the serial
console.
"foreground" and "background" are color codes in #AARRGGBB
notation, where AA RR GG BB are hexadecimal digits for alpha
(opacity), red, green and blue, respectively. #00000000
represents fully transparent, and #ffffffff represents opaque
white.
"shadow" controls the handling of the graphical console text
shadow. Permitted values are "none" (no shadowing), "std" or
"standard" (standard shadowing - foreground pixels are
raised), "all" (both background and foreground raised), and
"rev" or "reverse" (background pixels are raised.)
If any field is set to "*" or omitted (at the end of the line)
then that field is left unchanged.
The current defaults are:
menu color screen 37;40 #80ffffff #00000000 std
menu color border 30;44 #40000000 #00000000 std
menu color title 1;36;44 #c00090f0 #00000000 std
menu color unsel 37;44 #90ffffff #00000000 std
menu color hotkey 1;37;44 #ffffffff #00000000 std
menu color sel 7;37;40 #e0000000 #20ff8000 all
menu color hotsel 1;7;37;40 #e0400000 #20ff8000 all
menu color scrollbar 30;44 #40000000 #00000000 std
menu color tabmsg 31;40 #90ffff00 #00000000 std
menu color cmdmark 1;36;40 #c000ffff #00000000 std
menu color cmdline 37;40 #c0ffffff #00000000 std
menu color pwdborder 30;47 #80ffffff #20ffffff std
menu color pwdheader 31;47 #80ff8080 #20ffffff std
menu color pwdentry 30;47 #80ffffff #20ffffff std
menu color timeout_msg 37;40 #80ffffff #00000000 std
menu color timeout 1;37;40 #c0ffffff #00000000 std
MENU WIDTH 80
MENU MARGIN 10
MENU PASSWORDMARGIN 3
MENU ROWS 12
MENU TABMSGROW 18
MENU CMDLINEROW 18
MENU ENDROW 24
MENU PASSWORDROW 11
MENU TIMEOUTROW 20
These options control the layout of the menu on the screen.
The values above are the defaults.
The menu system honours the TIMEOUT command; if TIMEOUT is specified
it will execute the ONTIMEOUT command if one exists, otherwise it will
pick the default menu option.
Normally, the user can press [Tab] to edit the menu entry, and [Esc]
to return to the SYSLINUX command line. However, if the configuration
file specifies ALLOWOPTIONS 0, these keys will be disabled, and if
MENU MASTER PASSWD is set, they require the master password.
The simple menu system supports serial console, using the normal
SERIAL directive. However, it can be quite slow over a slow serial
link; you probably want to set your baudrate to 38400 or higher if
possible. It requires a Linux/VT220/ANSI-compatible terminal on the
other end.
+++ USING AN ALTERNATE CONFIGURATION FILE +++
It is also possible to load a secondary configuration file, to get to
another menu. To do that, invoke menu.c32 with the name of the
secondary configuration file.
LABEL othermenu
MENU LABEL Another Menu
KERNEL menu.c32
APPEND othermenu.conf
If you specify more than one file, they will all be read, in the order
specified. The dummy filename ~ (tilde) is replaced with the filename
of the main configuration file.
# The file graphics.conf contains common color and layout commands for
# all menus.
LABEL othermenu
MENU LABEL Another Menu
KERNEL vesamenu.c32
APPEND graphics.conf othermenu.conf
# Return to the main menu
LABEL mainmenu
MENU LABEL Return to Main Menu
KERNEL vesamenu.c32
APPEND graphics.conf ~
See also the MENU INCLUDE directive above.
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