From 744aebe369eaad5cb3a44e2c7d6c6bb26ab2c321 Mon Sep 17 00:00:00 2001 From: Sergey Kandaurov Date: Fri, 30 Dec 2011 06:24:59 +0000 Subject: [PATCH] Unset the environment variables associated with individual menu items 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 MFC after: 2 weeks --- sys/boot/forth/loader.4th | 19 ++++++++--- sys/boot/forth/menu.4th | 70 +++++++++++++++++++++++++++++++++------ sys/boot/forth/menu.4th.8 | 10 ++++-- 3 files changed, 81 insertions(+), 18 deletions(-) diff --git a/sys/boot/forth/loader.4th b/sys/boot/forth/loader.4th index c765147c6d95..1205741f7106 100644 --- a/sys/boot/forth/loader.4th +++ b/sys/boot/forth/loader.4th @@ -41,12 +41,15 @@ s" arch-i386" environment? [if] [if] include /boot/support.4th -\ ***** boot-conf -\ -\ Prepares to boot as specified by loaded configuration files. - only forth also support-functions also builtins definitions +: try-menu-unset + s" menu-unset" + ['] evaluate catch if + 2drop + then +; + : boot 0= if ( interpreted ) get_arguments then @@ -57,24 +60,32 @@ only forth also support-functions also builtins definitions 0 1 unload drop else s" kernelname" getenv? if ( a kernel has been loaded ) + try-menu-unset 1 boot exit then load_kernel_and_modules ?dup if exit then + try-menu-unset 0 1 boot exit then else s" kernelname" getenv? if ( a kernel has been loaded ) + try-menu-unset 1 boot exit then load_kernel_and_modules ?dup if exit then + try-menu-unset 0 1 boot exit then load_kernel_and_modules ?dup 0= if 0 1 boot then ; +\ ***** boot-conf +\ +\ Prepares to boot as specified by loaded configuration files. + : boot-conf 0= if ( interpreted ) get_arguments then 0 1 unload drop diff --git a/sys/boot/forth/menu.4th b/sys/boot/forth/menu.4th index fbb6c16b5c04..daac6c836f84 100644 --- a/sys/boot/forth/menu.4th +++ b/sys/boot/forth/menu.4th @@ -131,11 +131,11 @@ create init_text8 255 allot \ Print the value of menuidx loader_color? if - ." " + ." " (  ) then menuidx @ . loader_color? if - ." " + ." " (  ) then \ Move the cursor forward 1 column @@ -897,22 +897,60 @@ create init_text8 255 allot ; \ This function unsets all the possible environment variables associated with -\ creating the interactive menu. Call this when you want to clear the menu -\ area in preparation for another menu. +\ creating the interactive menu. \ -: menu-clear ( -- ) +: menu-unset ( -- ) 49 \ Iterator start (loop range 49 to 56; ASCII '1' to '8') begin - \ basename for caption variable - loader_color? if - s" ansi_caption[x]" - else - s" menu_caption[x]" - then + \ Unset variables in-order of appearance in menu.4th(8) + + s" menu_caption[x]" \ basename for caption variable -rot 2dup 13 + c! rot \ replace 'x' with current iteration unsetenv \ not erroneous to unset unknown var + s" menu_command[x]" \ command basename + -rot 2dup 13 + c! rot \ replace 'x' + unsetenv + + s" menu_keycode[x]" \ keycode basename + -rot 2dup 13 + c! rot \ replace 'x' + unsetenv + + s" ansi_caption[x]" \ ANSI caption basename + -rot 2dup 13 + c! rot \ replace 'x' + unsetenv + + s" toggled_text[x]" \ toggle_menuitem caption basename + -rot 2dup 13 + c! rot \ replace 'x' + unsetenv + + s" toggled_ansi[x]" \ toggle_menuitem ANSI caption basename + -rot 2dup 13 + c! rot \ replace 'x' + unsetenv + + s" menu_caption[x][y]" \ cycle_menuitem caption + -rot 2dup 13 + c! rot \ replace 'x' + 49 -rot + begin + 16 2over rot + c! \ replace 'y' + 2dup unsetenv + + rot 1+ dup 56 > 2swap rot + until + 2drop drop + + s" ansi_caption[x][y]" \ cycle_menuitem ANSI caption + -rot 2dup 13 + c! rot \ replace 'x' + 49 -rot + begin + 16 2over rot + c! \ replace 'y' + 2dup unsetenv + + rot 1+ dup 56 > 2swap rot + until + 2drop drop + s" 0 menukeyN !" \ basename for key association var -rot 2dup 9 + c! rot \ replace 'N' with current iteration evaluate \ assign zero (0) to key assoc. var @@ -921,6 +959,9 @@ create init_text8 255 allot until drop \ iterator + \ unset the timeout command + s" menu_timeout_command" unsetenv + \ clear the "Reboot" menu option flag s" menu_reboot" unsetenv 0 menureboot ! @@ -933,6 +974,13 @@ create init_text8 255 allot s" menu_options" unsetenv 0 menuoptions ! +; + +\ This function both unsets menu variables and visually erases the menu area +\ in-preparation for another menu. +\ +: menu-clear ( -- ) + menu-unset menu-erase ; diff --git a/sys/boot/forth/menu.4th.8 b/sys/boot/forth/menu.4th.8 index 55cbfd1e109b..dc00af83ffce 100644 --- a/sys/boot/forth/menu.4th.8 +++ b/sys/boot/forth/menu.4th.8 @@ -24,7 +24,7 @@ .\" .\" $FreeBSD$ .\" -.Dd Aug 29, 2011 +.Dd Dec 27, 2011 .Dt MENU.4TH 8 .Os .Sh NAME @@ -69,9 +69,13 @@ Clears the screen area within the menu bounding box. 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 -Unsets all possible environment variables used -to configure the menu and then calls +Calls +.Ic menu-unset +and then .Ic menu-erase . .El .Pp