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30 .Nd loader dynamic menu boot module
32 The file that goes by the name of
34 is a set of commands designed to display a dynamic menu system managed through
35 a system of carefully named environment variables.
38 by themselves are not enough for most uses.
40 examples below for the most common situations, and to
42 for additional commands.
44 Before using any of the commands provided in
51 This line is present in the default
52 .Pa /boot/forth/menu.rc
53 file, so it is not needed (and should not be re-issued) in a normal setup.
55 The commands provided by it are:
57 .Bl -tag -width disable-module_module -compact -offset indent
59 Draws the menu bounding box and initializes some internal state variables.
60 This should be called before any other menu-related functions.
62 Displays the menu (configured via the below documented environment variables)
63 and blocks on keyboard input, awaiting user action.
65 Clears the screen area within the menu bounding box.
69 and then redraws the menu.
71 Unsets the environment variables associated with individual menu items,
72 clearing the way for a new menu.
80 The environment variables that effect its behavior are:
81 .Bl -tag -width bootfile -offset indent
87 causes the menu to be displayed without color.
88 The default is to use ANSI coloring whenever possible.
89 If serial boot is enabled, color is disabled by default.
90 Color features include the use of ANSI bold for numbers appearing to the left
91 of menuitems and the use of special
93 variables described below.
97 will wait before executing
98 .Va menu_timeout_command
100 by default) unless a key is pressed.
105 will wait for user input and never execute
106 .Ic menu_timeout_command .
110 will boot immediately, preventing both interruption of the
112 process and escaping to the loader prompt.
117 for additional information.
118 .It Va menu_timeout_command
119 The command to be executed after
121 seconds if a key is not pressed.
124 .It Va loader_menu_frame
125 Sets the desired box style to draw around the boot menu.
132 .It Va loader_menu_timeout_x
133 Sets the desired column position of the timeout countdown text.
135 .It Va loader_menu_timeout_y
136 Sets the desired row position of the timeout countdown text.
138 .It Va loader_menu_title
139 The text to display above the menu.
141 .Dq Li "Welcome to FreeBSD" .
142 .It Va loader_menu_title_align
144 .Ic loader_menu_title
145 centered above the menu.
150 to instead display the title left-or-right justified
153 Sets the desired column position of the boot menu.
156 Sets the desired row position of the boot menu.
158 .It Va menu_caption[x]
159 The text to be displayed for the numbered menuitem
161 .It Va menu_command[x]
162 The command to be executed when the number associated with menuitem
165 See the list of included FICL words below for some ideas.
166 .It Va menu_keycode[x]
167 An optional decimal ASCII keycode to be associated with menuitem
169 When pressed, will cause the execution of
170 .Va menu_command[x] .
171 .It Va ansi_caption[x]
175 .Pq enabled by default ,
176 use this caption for menuitem
179 .Va menu_caption[x] .
180 .It Va toggled_text[x]
184 .Dq Li toggle_menuitem
185 (or a derivative thereof), the text displayed
186 will toggle between this and
187 .Va menu_caption[x] .
188 .It Va toggled_ansi[x]
195 .It Va menu_caption[x][y]
199 .Dq Li cycle_menuitem
200 (or a derivative thereof), the text displayed will cycle between this and other
201 .Va menu_caption[x][y]
203 .It Va ansi_caption[x][y]
205 .Va menu_caption[x][y]
213 associated with a given menuitem, that menuitem will allow to select
215 .Pq see Xr eeprom 1M .
219 a single blank-line and an
221 header are inserted between
222 .Va menu_caption[x-1]
227 If set, adds a built-in
229 menuitem to the end of the last configured menuitem.
234 menuitem will be inserted before the
239 In addition, it provides the following FICL words:
241 .Bl -tag -width disable-module_module -compact -offset indent
242 .It Ic arch-i386? ( -- BOOL )
243 Returns true (-1) on i386 and false (0) otherwise.
244 .It Ic acpipresent? ( -- BOOL )
245 Returns true (-1) if ACPI is present and false (0) otherwise.
246 .It Ic acpienabled? ( -- BOOL )
247 Returns true (-1) if ACPI is enabled and false (0) otherwise.
248 .It Ic toggle_menuitem ( N -- N )
257 represents the ASCII decimal value for
259 .It Ic cycle_menuitem ( N -- N )
263 .Va menu_caption[x][y]
266 represents the ASCII decimal value for
272 above, use any number between 1 through 9.
273 Sorry, double-digits are not currently supported.
275 .Bl -tag -width /boot/forth/loader.4th -compact
276 .It Pa /boot/zfsloader
279 .It Pa /boot/forth/menu.4th
282 .It Pa /boot/loader.rc
284 bootstrapping script.
289 .Bd -literal -offset indent -compact
290 include /boot/forth/menu.4th
292 set menu_caption[1]="Boot"
293 set menu_command[1]="boot"
295 set menu_caption[2]="Option: NO"
296 set toggled_text[2]="Option: YES"
297 set menu_command[2]="toggle_menuitem"
298 set menu_timeout_command="boot"