scripts/Menuconfig

   1 #! /bin/sh
   2 #
   3 # This script is used to configure the linux kernel.
   4 #
   5 # It was inspired by a desire to not have to hit <enter> 9 million times
   6 # or startup the X server just to change a single kernel parameter.
   7 #
   8 # This script attempts to parse the configuration files, which are
   9 # scattered throughout the kernel source tree, and creates a temporary
  10 # set of mini scripts which are in turn used to create nested menus and
  11 # radiolists.
  12 #
  13 # It uses a very modified/mutilated version of the "dialog" utility
  14 # written by Savio Lam (lam836@cs.cuhk.hk). Savio is not responsible
  15 # for this script or the version of dialog used by this script.
  16 # Please do not contact him with questions. The official version of
  17 # dialog is available at sunsite.unc.edu or a sunsite mirror.
  18 #
  19 # Portions of this script were borrowed from the original Configure
  20 # script.
  21 #
  22 # William Roadcap was the original author of Menuconfig.
  23 # Michael Elizabeth Chastain (mec@shout.net) is the current maintainer.
  24 #
  25 # 070497 Bernhard Kaindl (bkaindl@netway.at) - get default values for
  26 # new bool, tristate and dep_tristate parameters from the defconfig file.
  27 # new configuration parameters are marked with '(NEW)' as in make config.
  28 #
  29 # 180697 Bernhard Kaindl (bkaindl@netway.at) - added the needed support
  30 # for string options. They are handled like the int and hex options.
  31 #
  32 # 081297 Pavel Machek (pavel@atrey.karlin.mff.cuni.cz) - better error
  33 # handling
  34 #
  35 # 131197 Michael Chastain (mec@shout.net) - output all lines for a
  36 # choice list, not just the selected one.  This makes the output
  37 # the same as Configure output, which is important for smart config
  38 # dependencies.
  39 #
  40 # 101297 Michael Chastain (mec@shout.net) - remove sound driver cruft.
  41 #
  42 # 221297 Michael Chastain (mec@shout.net) - make define_bool actually
  43 # define its arguments so that later tests on them work right.
  44 #
  45 # 160198 Michael Chastain (mec@shout.net) - fix bug with 'c' command
  46 # (complement existing value) when used on virgin uninitialized variables.
  47 #
  48 # 090398 Axel Boldt (boldt@math.ucsb.edu) - allow for empty lines in help
  49 # texts.
  50 #
  51 # 12 Dec 1998, Michael Elizabeth Chastain (mec@shout.net)
  52 # Remove a /tmp security hole in get_def (also makes it faster).
  53 # Give uninitialized variables canonical values rather than null value.
  54 # Change a lot of places to call set_x_info uniformly.
  55 # Take out message about preparing version (old sound driver cruft).
  56 #
  57 # 13 Dec 1998, Riley H Williams <rhw@memalpha.cx>
  58 # When an error occurs, actually display the error message as well as
  59 # our comments thereon.
  60 #
  61 # 31 Dec 1998, Michael Elizabeth Chastain (mec@shout.net)
  62 # Fix mod_bool to honor $CONFIG_MODULES.
  63 # Fix dep_tristate to call define_bool when dependency is "n".
  64 #
  65 # 02 January 1999, Michael Elizabeth Chastain (mec@shout.net)
  66 # Blow away lxdialog.scrltmp on entry to activate_menu.  This protects
  67 # against people who use commands like ' ' to select menus.
  68 #
  69 # 24 January 1999, Michael Elizabeth Chastain, <mec@shout.net>
  70 # - Improve the exit message (Jeff Ronne).
  71 #
  72 # 06 July 1999, Andrzej M. Krzysztofowicz, <ankry@mif.pg.gda.pl>
  73 # - Support for multiple conditions in dep_tristate().
  74 # - Implemented new functions: define_tristate(), define_int(), define_hex(),
  75 #   define_string(), dep_bool().
  76 #
  77
  78
  79 #
  80 # Change this to TRUE if you prefer all kernel options listed
  81 # in a single menu rather than the standard menu hierarchy.
  82 #
  83 single_menu_mode=
  84
  85 #
  86 # Make sure we're really running bash.
  87 #
  88 [ -z "$BASH" ] && { echo "Menuconfig requires bash" 1>&2; exit 1; }
  89
  90 #
  91 # Cache function definitions, turn off posix compliance
  92 #
  93 set -h +o posix
  94
  95
  96
  97 # Given a configuration variable, set the global variable $x to its value,
  98 # and the global variable $info to the string " (NEW)" if this is a new
  99 # variable.
 100 #
 101 # This function looks for: (1) the current value, or (2) the default value
 102 # from the arch-dependent defconfig file, or (3) a default passed by the caller.
 103
 104 function set_x_info () {
 105     eval x=\$$1
 106     if [ -z "$x" ]; then
 107         eval `sed -n -e 's/# \(.*\) is not set.*/\1=n/' -e "/^$1=/p" arch/$ARCH/defconfig`
 108         eval x=\${$1:-"$2"}
 109         eval $1=$x
 110         eval INFO_$1="' (NEW)'"
 111     fi
 112     eval info="\$INFO_$1"
 113 }
 114
 115 #
 116 # Load the functions used by the config.in files.
 117 #
 118 # I do this because these functions must be redefined depending
 119 # on whether they are being called for interactive use or for
 120 # saving a configuration to a file.
 121 #
 122 # Thank the heavens bash supports nesting function definitions.
 123 #
 124 load_functions () {
 125
 126 #
 127 # Additional comments
 128 #
 129 function comment () {
 130         comment_ctr=$[ comment_ctr + 1 ]
 131         echo -ne "': $comment_ctr' '--- $1' " >>MCmenu
 132 }
 133
 134 #
 135 # Define a boolean to a specific value.
 136 #
 137 function define_bool () {
 138         eval $1=$2
 139 }
 140
 141 function define_tristate () {
 142         eval $1=$2
 143 }
 144
 145 function define_hex () {
 146         eval $1=$2
 147 }
 148
 149 function define_int () {
 150         eval $1=$2
 151 }
 152
 153 function define_string () {
 154         eval $1="$2"
 155 }
 156
 157 #
 158 # Create a boolean (Yes/No) function for our current menu
 159 # which calls our local bool function.
 160 #
 161 function bool () {
 162         set_x_info "$2" "n"
 163
 164         case $x in
 165         y|m)    flag="*" ;;
 166         n)      flag=" " ;;
 167         esac
 168
 169         echo -ne "'$2' '[$flag] $1$info' " >>MCmenu
 170
 171         echo -e "function $2 () { l_bool '$2' \"\$1\" ;}\n" >>MCradiolists
 172 }
 173
 174 #
 175 # Create a tristate (Yes/No/Module) radiolist function
 176 # which calls our local tristate function.
 177 #
 178 # Collapses to a boolean (Yes/No) if module support is disabled.
 179 #
 180 function tristate () {
 181         if [ "$CONFIG_MODULES" != "y" ]
 182         then
 183                 bool "$1" "$2"
 184         else
 185                 set_x_info "$2" "n"
 186
 187                 case $x in
 188                 y) flag="*" ;;
 189                 m) flag="M" ;;
 190                 *) flag=" " ;;
 191                 esac
 192
 193                 echo -ne "'$2' '<$flag> $1$info' " >>MCmenu
 194
 195                 echo -e "
 196                 function $2 () { l_tristate '$2' \"\$1\" ;}" >>MCradiolists
 197         fi
 198 }
 199
 200 #
 201 # Create a tristate radiolist function which is dependent on
 202 # another kernel configuration option.
 203 #
 204 # Quote from the original configure script:
 205 #
 206 #       If the option we depend upon is a module,
 207 #       then the only allowable options are M or N.  If Y, then
 208 #       this is a normal tristate.  This is used in cases where modules
 209 #       are nested, and one module requires the presence of something
 210 #       else in the kernel.
 211 #
 212 function dep_tristate () {
 213         ques="$1"
 214         var="$2"
 215         dep=y
 216         shift 2
 217         while [ $# -gt 0 ]; do
 218                 if   [ "$1" = y ]; then
 219                         shift
 220                 elif [ "$1" = m ]; then
 221                         dep=m
 222                         shift
 223                 else
 224                         dep=n
 225                         shift $#
 226                 fi
 227         done
 228         if [ "$dep" = y ]; then
 229             tristate "$ques" "$var"
 230         elif [ "$dep" = m ]; then
 231             mod_bool "$ques" "$var"
 232         else
 233             define_tristate "$var" n
 234         fi
 235 }
 236
 237 #
 238 #   Same as above, but now only Y and N are allowed as dependency
 239 #   (i.e. third and next arguments).
 240 #
 241 function dep_bool () {
 242         ques="$1"
 243         var="$2"
 244         dep=y
 245         shift 2
 246         while [ $# -gt 0 ]; do
 247                 if [ "$1" = y ]; then
 248                         shift
 249                 else
 250                         dep=n
 251                         shift $#
 252                 fi
 253         done
 254         if [ "$dep" = y ]; then
 255             bool "$ques" "$var"
 256         else
 257             define_bool "$var" n
 258         fi
 259 }
 260
 261 function dep_mbool () {
 262         ques="$1"
 263         var="$2"
 264         dep=y
 265         shift 2
 266         while [ $# -gt 0 ]; do
 267                 if [ "$1" = y -o "$1" = m ]; then
 268                         shift
 269                 else
 270                         dep=n
 271                         shift $#
 272                 fi
 273         done
 274         if [ "$dep" = y ]; then
 275             bool "$ques" "$var"
 276         else
 277             define_bool "$var" n
 278         fi
 279 }
 280
 281 #
 282 # Add a menu item which will call our local int function.
 283 #
 284 function int () {
 285         set_x_info "$2" "$3"
 286
 287         echo -ne "'$2' '($x) $1$info' " >>MCmenu
 288
 289         echo -e "function $2 () { l_int '$1' '$2' '$3' '$x' ;}" >>MCradiolists
 290 }
 291
 292 #
 293 # Add a menu item which will call our local hex function.
 294 #
 295 function hex () {
 296         set_x_info "$2" "$3"
 297         x=${x##*[x,X]}
 298
 299         echo -ne "'$2' '($x) $1$info' " >>MCmenu
 300
 301         echo -e "function $2 () { l_hex '$1' '$2' '$3' '$x' ;}" >>MCradiolists
 302 }
 303
 304 #
 305 # Add a menu item which will call our local string function.
 306 #
 307 function string () {
 308         set_x_info "$2" "$3"
 309
 310         echo -ne "'$2' '     $1: \"$x\"$info' " >>MCmenu
 311
 312         echo -e "function $2 () { l_string '$1' '$2' '$3' '$x' ;}" >>MCradiolists
 313 }
 314
 315 #
 316 # Add a menu item which will call our local One-of-Many choice list.
 317 #
 318 function choice () {
 319         #
 320         # Need to remember params cause they're gonna get reset.
 321         #
 322         title=$1
 323         choices=$2
 324         default=$3
 325         current=
 326
 327         #
 328         # Find out if one of the choices is already set.
 329         # If it's not then make it the default.
 330         #
 331         set -- $choices
 332         firstchoice=$2
 333
 334         while [ -n "$2" ]
 335         do
 336                 if eval [ "_\$$2" = "_y" ]
 337                 then
 338                         current=$1
 339                         break
 340                 fi
 341                 shift ; shift
 342         done
 343
 344         : ${current:=$default}
 345
 346         echo -ne "'$firstchoice' '($current) $title' " >>MCmenu
 347
 348         echo -e "
 349         function $firstchoice () \
 350                 { l_choice '$title' \"$choices\" $current ;}" >>MCradiolists
 351 }
 352
 353 } # END load_functions()
 354
 355
 356
 357
 358
 359 #
 360 # Extract available help for an option from Configure.help
 361 # and send it to standard output.
 362 #
 363 # Most of this function was borrowed from the original kernel
 364 # Configure script.
 365 #
 366 function extract_help () {
 367   if [ -f Documentation/Configure.help ]
 368   then
 369      #first escape regexp special characters in the argument:
 370      var=$(echo "$1"|sed 's/[][\/.^$*]/\\&/g')
 371      #now pick out the right help text:
 372      text=$(sed -n "/^$var[     ]*\$/,\${
 373                         /^$var[         ]*\$/c\\
 374 ${var}:\\
 375
 376                         /^#/b
 377                         /^[^    ]/q
 378                         s/^  //
 379                         p
 380                     }" Documentation/Configure.help)
 381
 382      if [ -z "$text" ]
 383      then
 384           echo "There is no help available for this kernel option."
 385           return 1
 386      else
 387           echo "$text"
 388      fi
 389   else
 390          echo "There is no help available for this kernel option."
 391          return 1
 392   fi
 393 }
 394
 395 #
 396 # Activate a help dialog.
 397 #
 398 function help () {
 399         if extract_help $1 >help.out
 400         then
 401                 $DIALOG --backtitle "$backtitle" --title "$2"\
 402                         --textbox help.out $ROWS $COLS
 403         else
 404                 $DIALOG --backtitle "$backtitle" \
 405                         --textbox help.out $ROWS $COLS
 406         fi
 407         rm -f help.out
 408 }
 409
 410 #
 411 # Show the README file.
 412 #
 413 function show_readme () {
 414         $DIALOG --backtitle "$backtitle" \
 415                 --textbox scripts/README.Menuconfig $ROWS $COLS
 416 }
 417
 418 #
 419 # Begin building the dialog menu command and Initialize the
 420 # Radiolist function file.
 421 #
 422 function menu_name () {
 423         echo -ne "$DIALOG --title '$1'\
 424                         --backtitle '$backtitle' \
 425                         --menu '$menu_instructions' \
 426                         $ROWS $COLS $((ROWS-10)) \
 427                         '$default' " >MCmenu
 428         >MCradiolists
 429 }
 430
 431 #
 432 # Add a submenu option to the menu currently under construction.
 433 #
 434 function submenu () {
 435         echo -ne "'activate_menu $2' '$1  --->' " >>MCmenu
 436 }
 437
 438 #
 439 # Handle a boolean (Yes/No) option.
 440 #
 441 function l_bool () {
 442         if [ -n "$2" ]
 443         then
 444                 case "$2" in
 445                 y|m)    eval $1=y ;;
 446                 c)      eval x=\$$1
 447                         case $x in
 448                         y) eval $1=n ;;
 449                         n) eval $1=y ;;
 450                         *) eval $1=y ;;
 451                         esac ;;
 452                 *)      eval $1=n ;;
 453                 esac
 454         else
 455                 echo -ne "\007"
 456         fi
 457 }
 458
 459 #
 460 # Same as bool() except options are (Module/No)
 461 #
 462 function mod_bool () {
 463         if [ "$CONFIG_MODULES" != "y" ]; then
 464             define_bool "$2" "n"
 465         else
 466             set_x_info "$2" "n"
 467
 468             case $x in
 469             y|m) flag='M' ;;
 470             *)   flag=' ' ;;
 471             esac
 472
 473             echo -ne "'$2' '<$flag> $1$info' " >>MCmenu
 474
 475             echo -e "function $2 () { l_mod_bool '$2' \"\$1\" ;}" >>MCradiolists
 476         fi
 477 }
 478
 479 #
 480 # Same as l_bool() except options are (Module/No)
 481 #
 482 function l_mod_bool() {
 483         if [ -n "$2" ]
 484         then
 485                 case "$2" in
 486                 y)      echo -en "\007"
 487                         ${DIALOG} --backtitle "$backtitle" \
 488                                   --infobox "\
 489 This feature depends on another which has been configured as a module.  \
 490 As a result, this feature will be built as a module." 4 70
 491                         sleep 5
 492                         eval $1=m ;;
 493                 m)      eval $1=m ;;
 494                 c)      eval x=\$$1
 495                         case $x in
 496                         m) eval $1=n ;;
 497                         n) eval $1=m ;;
 498                         *) eval $1=m ;;
 499                         esac ;;
 500                 *)      eval $1=n ;;
 501                 esac
 502         else
 503                 echo -ne "\007"
 504         fi
 505 }
 506
 507 #
 508 # Handle a tristate (Yes/No/Module) option.
 509 #
 510 function l_tristate () {
 511         if [ -n "$2" ]
 512         then
 513                 eval x=\$$1
 514
 515                 case "$2" in
 516                 y) eval $1=y ;;
 517                 m) eval $1=m ;;
 518                 c) eval x=\$$1
 519                    case $x in
 520                    y) eval $1=n ;;
 521                    n) eval $1=m ;;
 522                    m) eval $1=y ;;
 523                    *) eval $1=y ;;
 524                    esac ;;
 525                 *) eval $1=n ;;
 526                 esac
 527         else
 528                 echo -ne "\007"
 529         fi
 530 }
 531
 532 #
 533 # Create a dialog for entering an integer into a kernel option.
 534 #
 535 function l_int () {
 536         while true
 537         do
 538                 if $DIALOG --title "$1" \
 539                         --backtitle "$backtitle" \
 540                         --inputbox "$inputbox_instructions_int" \
 541                         10 75 "$4" 2>MCdialog.out
 542                 then
 543                         answer="`cat MCdialog.out`"
 544                         answer="${answer:-$3}"
 545
 546                         # Semantics of + and ? in GNU expr changed, so
 547                         # we avoid them:
 548                         if expr "$answer" : '0$\|-[1-9][0-9]*$\|[1-9][0-9]*$' >/dev/null
 549                         then
 550                                 eval $2="$answer"
 551                         else
 552                                 eval $2="$3"
 553                                 echo -en "\007"
 554                                 ${DIALOG} --backtitle "$backtitle" \
 555                                         --infobox "You have made an invalid entry." 3 43
 556                                 sleep 2
 557                         fi
 558
 559                         break
 560                 fi
 561
 562                 help "$2" "$1"
 563         done
 564 }
 565
 566 #
 567 # Create a dialog for entering a hexadecimal into a kernel option.
 568 #
 569 function l_hex () {
 570         while true
 571         do
 572                 if $DIALOG --title "$1" \
 573                         --backtitle "$backtitle" \
 574                         --inputbox "$inputbox_instructions_hex" \
 575                         10 75 "$4" 2>MCdialog.out
 576                 then
 577                         answer="`cat MCdialog.out`"
 578                         answer="${answer:-$3}"
 579                         answer="${answer##*[x,X]}"
 580
 581                         if expr "$answer" : '[0-9a-fA-F][0-9a-fA-F]*$' >/dev/null
 582                         then
 583                                 eval $2="$answer"
 584                         else
 585                                 eval $2="$3"
 586                                 echo -en "\007"
 587                                 ${DIALOG} --backtitle "$backtitle" \
 588                                         --infobox "You have made an invalid entry." 3 43
 589                                 sleep 2
 590                         fi
 591
 592                         break
 593                 fi
 594
 595                 help "$2" "$1"
 596         done
 597 }
 598
 599 #
 600 # Create a dialog for entering a string into a kernel option.
 601 #
 602 function l_string () {
 603         while true
 604         do
 605                 if $DIALOG --title "$1" \
 606                         --backtitle "$backtitle" \
 607                         --inputbox "$inputbox_instructions_string" \
 608                         10 75 "$4" 2>MCdialog.out
 609                 then
 610                         answer="`cat MCdialog.out`"
 611                         answer="${answer:-$3}"
 612
 613                         #
 614                         # Someone may add a nice check for the entered
 615                         # string here...
 616                         #
 617                         eval $2=\"$answer\"
 618
 619                         break
 620                 fi
 621
 622                 help "$2" "$1"
 623         done
 624 }
 625
 626
 627 #
 628 # Handle a one-of-many choice list.
 629 #
 630 function l_choice () {
 631         #
 632         # Need to remember params cause they're gonna get reset.
 633         #
 634         title="$1"
 635         choices="$2"
 636         current="$3"
 637
 638         #
 639         # Scan current value of choices and set radiolist switches.
 640         #
 641         list=
 642         set -- $choices
 643         firstchoice=$2
 644         while [ -n "$2" ]
 645         do
 646                 case "$1" in
 647                 "$current")     list="$list $2 $1 ON "  ;;
 648                 *)              list="$list $2 $1 OFF " ;;
 649                 esac
 650
 651                 shift ; shift
 652         done
 653
 654         while true
 655         do
 656                 if $DIALOG --title "$title" \
 657                         --backtitle "$backtitle" \
 658                         --radiolist "$radiolist_instructions" \
 659                         15 70 6 $list 2>MCdialog.out
 660                 then
 661                         choice=`cat MCdialog.out`
 662                         break
 663                 fi
 664
 665                 help "$firstchoice" "$title"
 666         done
 667
 668         #
 669         # Now set the boolean value of each option based on
 670         # the selection made from the radiolist.
 671         #
 672         set -- $choices
 673         while [ -n "$2" ]
 674         do
 675                 if [ "$2" = "$choice" ]
 676                 then
 677                         eval $2="y"
 678                 else
 679                         eval $2="n"
 680                 fi
 681
 682                 shift ; shift
 683         done
 684 }
 685
 686 #
 687 # Call awk, and watch for error codes, etc.
 688 #
 689 function callawk () {
 690 awk "$1" || echo "Awk died with error code $?. Giving up." || exit 1
 691 }
 692
 693 #
 694 # A faster awk based recursive parser. (I hope)
 695 #
 696 function parser1 () {
 697 callawk '
 698 BEGIN {
 699         menu_no = 0
 700         comment_is_option = 0
 701         parser("'$CONFIG_IN'","MCmenu0")
 702 }
 703
 704 function parser(ifile,menu) {
 705
 706         while (getline <ifile) {
 707                 if ($1 == "mainmenu_option") {
 708                         comment_is_option = "1"
 709                 }
 710                 else if ($1 == "comment" && comment_is_option == "1") {
 711                         comment_is_option= "0"
 712                         sub($1,"",$0)
 713                         ++menu_no
 714
 715                         printf("submenu %s MCmenu%s\n", $0, menu_no) >>menu
 716
 717                         newmenu = sprintf("MCmenu%d", menu_no);
 718                         printf( "function MCmenu%s () {\n"\
 719                                 "default=$1\n"\
 720                                 "menu_name %s\n",\
 721                                  menu_no, $0) >newmenu
 722
 723                         parser(ifile, newmenu)
 724                 }
 725                 else if ($1 ~ "endmenu") {
 726                         printf("}\n") >>menu
 727                         return
 728                 }
 729                 else if ($0 ~ /^#|\$MAKE|mainmenu_name/) {
 730                         printf("") >>menu
 731                 }
 732                 else if ($1 == "source") {
 733                         parser($2,menu)
 734                 }
 735                 else {
 736                         print >>menu
 737                 }
 738         }
 739 }'
 740 }
 741
 742 #
 743 # Secondary parser for single menu mode.
 744 #
 745 function parser2 () {
 746 callawk '
 747 BEGIN {
 748         parser("'$CONFIG_IN'","MCmenu0")
 749 }
 750
 751 function parser(ifile,menu) {
 752
 753         while (getline <ifile) {
 754                 if ($1 ~ /mainmenu_option|endmenu/) {
 755                         printf("") >>menu
 756                 }
 757                 else if ($0 ~ /^#|$MAKE|mainmenu_name/) {
 758                         printf("") >>menu
 759                 }
 760                 else if ($1 == "source") {
 761                         parser($2,menu)
 762                 }
 763                 else {
 764                         print >>menu
 765                 }
 766         }
 767 }'
 768 }
 769
 770 #
 771 # Parse all the config.in files into mini scripts.
 772 #
 773 function parse_config_files () {
 774         rm -f MCmenu*
 775
 776         echo "function MCmenu0 () {" >MCmenu0
 777         echo 'default=$1' >>MCmenu0
 778         echo "menu_name 'Main Menu'" >>MCmenu0
 779
 780         if [ "_$single_menu_mode" = "_TRUE" ]
 781         then
 782                 parser2
 783         else
 784                 parser1
 785         fi
 786
 787         echo "comment ''"       >>MCmenu0
 788         echo "g_alt_config"     >>MCmenu0
 789         echo "s_alt_config"     >>MCmenu0
 790
 791         echo "}" >>MCmenu0
 792
 793         #
 794         # These mini scripts must be sourced into the current
 795         # environment in order for all of this to work.  Leaving
 796         # them on the disk as executables screws up the recursion
 797         # in activate_menu(), among other things.  Once they are
 798         # sourced we can discard them.
 799         #
 800         for i in MCmenu*
 801         do
 802                 echo -n "."
 803                 source ./$i
 804         done
 805         rm -f MCmenu*
 806 }
 807
 808 #
 809 # This is the menu tree's bootstrap.
 810 #
 811 # Executes the parsed menus on demand and creates a set of functions,
 812 # one per configuration option.  These functions will in turn execute
 813 # dialog commands or recursively call other menus.
 814 #
 815 function activate_menu () {
 816         rm -f lxdialog.scrltmp
 817         while true
 818         do
 819                 comment_ctr=0           #So comment lines get unique tags
 820
 821                 $1 "$default" 2> MCerror #Create the lxdialog menu & functions
 822
 823                 if [ "$?" != "0" ]
 824                 then
 825                         clear
 826                         cat <<EOM
 827
 828 Menuconfig has encountered a possible error in one of the kernel's
 829 configuration files and is unable to continue.  Here is the error
 830 report:
 831
 832 EOM
 833                         sed 's/^/ Q> /' MCerror
 834                         cat <<EOM
 835
 836 Please report this to the maintainer <mec@shout.net>.  You may also
 837 send a problem report to <linux-kernel@vger.rutgers.edu>.
 838
 839 Please indicate the kernel version you are trying to configure and
 840 which menu you were trying to enter when this error occurred.
 841
 842 EOM
 843                         cleanup
 844                         exit 1
 845                 fi
 846                 rm -f MCerror
 847
 848                 . ./MCradiolists                #Source the menu's functions
 849
 850                 . ./MCmenu 2>MCdialog.out       #Activate the lxdialog menu
 851                 ret=$?
 852
 853                 read selection <MCdialog.out
 854
 855                 case "$ret" in
 856                 0|3|4|5|6)
 857                         defaults="$selection\x12$defaults"  #pseudo stack
 858                         case "$ret" in
 859                         0) eval $selection   ;;
 860                         3) eval $selection y ;;
 861                         4) eval $selection n ;;
 862                         5) eval $selection m ;;
 863                         6) eval $selection c ;;
 864                         esac
 865                         default="${defaults%%\x12*}" defaults="${defaults#*\x12}"
 866                         ;;
 867                 2)
 868                         default="${selection%%\ *}"
 869
 870                         case "$selection" in
 871                         *"-->"*|*"alt_config"*)
 872                                 show_readme ;;
 873                         *)
 874                                 eval help $selection ;;
 875                         esac
 876                         ;;
 877                 255|1)
 878                         break
 879                         ;;
 880                 139)
 881                         stty sane
 882                         clear
 883                         cat <<EOM
 884
 885 There seems to be a problem with the lxdialog companion utility which is
 886 built prior to running Menuconfig.  Usually this is an indicator that you
 887 have upgraded/downgraded your ncurses libraries and did not remove the
 888 old ncurses header file(s) in /usr/include or /usr/include/ncurses.
 889
 890 It is VERY important that you have only one set of ncurses header files
 891 and that those files are properly version matched to the ncurses libraries
 892 installed on your machine.
 893
 894 You may also need to rebuild lxdialog.  This can be done by moving to
 895 the /usr/src/linux/scripts/lxdialog directory and issuing the
 896 "make clean all" command.
 897
 898 If you have verified that your ncurses install is correct, you may email
 899 the maintainer <mec@shout.net> or post a message to
 900 <linux-kernel@vger.rutgers.edu> for additional assistance.
 901
 902 EOM
 903                         cleanup
 904                         exit 139
 905                         ;;
 906                 esac
 907         done
 908 }
 909
 910 #
 911 # Create a menu item to load an alternate configuration file.
 912 #
 913 g_alt_config () {
 914         echo -n "get_alt_config 'Load an Alternate Configuration File' "\
 915                 >>MCmenu
 916 }
 917
 918 #
 919 # Get alternate config file name and load the
 920 # configuration from it.
 921 #
 922 get_alt_config () {
 923         set -f ## Switch file expansion OFF
 924
 925         while true
 926         do
 927                 ALT_CONFIG="${ALT_CONFIG:-$DEFAULTS}"
 928
 929                 $DIALOG --backtitle "$backtitle" \
 930                         --inputbox "\
 931 Enter the name of the configuration file you wish to load.  \
 932 Accept the name shown to restore the configuration you \
 933 last retrieved.  Leave blank to abort."\
 934                         11 55 "$ALT_CONFIG" 2>MCdialog.out
 935
 936                 if [ "$?" = "0" ]
 937                 then
 938                         ALT_CONFIG=`cat MCdialog.out`
 939
 940                         [ "_" = "_$ALT_CONFIG" ] && break
 941
 942                         if eval [ -r "$ALT_CONFIG" ]
 943                         then
 944                                 eval load_config_file "$ALT_CONFIG"
 945                                 break
 946                         else
 947                                 echo -ne "\007"
 948                                 $DIALOG --backtitle "$backtitle" \
 949                                         --infobox "File does not exist!"  3 38
 950                                 sleep 2
 951                         fi
 952                 else
 953                         cat <<EOM >help.out
 954
 955 For various reasons, one may wish to keep several different kernel
 956 configurations available on a single machine.
 957
 958 If you have saved a previous configuration in a file other than the
 959 kernel's default, entering the name of the file here will allow you
 960 to modify that configuration.
 961
 962 If you are uncertain, then you have probably never used alternate
 963 configuration files.  You should therefor leave this blank to abort.
 964
 965 EOM
 966                         $DIALOG --backtitle "$backtitle"\
 967                                 --title "Load Alternate Configuration"\
 968                                 --textbox help.out $ROWS $COLS
 969                 fi
 970         done
 971
 972         set +f ## Switch file expansion ON
 973         rm -f help.out MCdialog.out
 974 }
 975
 976 #
 977 # Create a menu item to store an alternate config file.
 978 #
 979 s_alt_config () {
 980         echo -n "save_alt_config 'Save Configuration to an Alternate File' "\
 981                  >>MCmenu
 982 }
 983
 984 #
 985 # Get an alternate config file name and save the current
 986 # configuration to it.
 987 #
 988 save_alt_config () {
 989         set -f  ## Switch file expansion OFF
 990
 991         while true
 992         do
 993                 $DIALOG --backtitle "$backtitle" \
 994                         --inputbox "\
 995 Enter a filename to which this configuration should be saved \
 996 as an alternate.  Leave blank to abort."\
 997                         10 55 "$ALT_CONFIG" 2>MCdialog.out
 998
 999                 if [ "$?" = "0" ]
1000                 then
1001                         ALT_CONFIG=`cat MCdialog.out`
1002
1003                         [ "_" = "_$ALT_CONFIG" ] && break
1004
1005                         if eval touch $ALT_CONFIG 2>/dev/null
1006                         then
1007                                 eval save_configuration $ALT_CONFIG
1008                                 load_functions  ## RELOAD
1009                                 break
1010                         else
1011                                 echo -ne "\007"
1012                                 $DIALOG --backtitle "$backtitle" \
1013                                         --infobox "Can't create file!  Probably a nonexistent directory." 3 60
1014                                 sleep 2
1015                         fi
1016                 else
1017                         cat <<EOM >help.out
1018
1019 For various reasons, one may wish to keep different kernel
1020 configurations available on a single machine.
1021
1022 Entering a file name here will allow you to later retrieve, modify
1023 and use the current configuration as an alternate to whatever
1024 configuration options you have selected at that time.
1025
1026 If you are uncertain what all this means then you should probably
1027 leave this blank.
1028 EOM
1029                         $DIALOG --backtitle "$backtitle"\
1030                                 --title "Save Alternate Configuration"\
1031                                 --textbox help.out $ROWS $COLS
1032                 fi
1033         done
1034
1035         set +f  ## Switch file expansion ON
1036         rm -f help.out MCdialog.out
1037 }
1038
1039 #
1040 # Load config options from a file.
1041 # Converts all "# OPTION is not set" lines to "OPTION=n" lines
1042 #
1043 function load_config_file () {
1044         awk '
1045           /# .* is not set.*/ { printf("%s=n\n", $2) }
1046         ! /# .* is not set.*/ { print }
1047         ' $1 >.tmpconfig
1048
1049         source ./.tmpconfig
1050         rm -f .tmpconfig
1051 }
1052
1053 #
1054 # Just what it says.
1055 #
1056 save_configuration () {
1057         echo
1058         echo -n "Saving your kernel configuration."
1059
1060         #
1061         # Now, let's redefine the configuration functions for final
1062         # output to the config files.
1063         #
1064         # Nested function definitions, YIPEE!
1065         #
1066         function bool () {
1067                 set_x_info "$2" "n"
1068                 eval define_bool "$2" "$x"
1069         }
1070
1071         function tristate () {
1072                 set_x_info "$2" "n"
1073                 eval define_tristate "$2" "$x"
1074         }
1075
1076         function dep_tristate () {
1077                 set_x_info "$2" "n"
1078                 var="$2"
1079                 shift 2
1080                 while [ $# -gt 0 ]; do
1081                         if   [ "$1" = y ]; then
1082                                 shift
1083                         elif [ "$1" = m -a "$x" != n ]; then
1084                                 x=m; shift
1085                         else
1086                                 x=n; shift $#
1087                         fi
1088                 done
1089                 define_tristate "$var" "$x"
1090         }
1091
1092         function dep_bool () {
1093                 set_x_info "$2" "n"
1094                 var="$2"
1095                 shift 2
1096                 while [ $# -gt 0 ]; do
1097                         if   [ "$1" = y ]; then
1098                                 shift
1099                         else
1100                                 x=n; shift $#
1101                         fi
1102                 done
1103                 define_bool "$var" "$x"
1104         }
1105
1106         function dep_mbool () {
1107                 set_x_info "$2" "n"
1108                 var="$2"
1109                 shift 2
1110                 while [ $# -gt 0 ]; do
1111                         if   [ "$1" = y -o "$1" = m ]; then
1112                                 shift
1113                         else
1114                                 x=n; shift $#
1115                         fi
1116                 done
1117                 define_bool "$var" "$x"
1118         }
1119
1120         function int () {
1121                 set_x_info "$2" "$3"
1122                 echo "$2=$x"            >>$CONFIG
1123                 echo "#define $2 ($x)"  >>$CONFIG_H
1124         }
1125
1126         function hex () {
1127                 set_x_info "$2" "$3"
1128                 echo "$2=$x"                     >>$CONFIG
1129                 echo "#define $2 0x${x##*[x,X]}" >>$CONFIG_H
1130         }
1131
1132         function string () {
1133                 set_x_info "$2" "$3"
1134                 echo "$2=\"$x\""                         >>$CONFIG
1135                 echo "#define $2 \"$x\""        >>$CONFIG_H
1136         }
1137
1138         function define_hex () {
1139                 eval $1="$2"
1140                 echo "$1=$2"                    >>$CONFIG
1141                 echo "#define $1 0x${2##*[x,X]}"        >>$CONFIG_H
1142         }
1143
1144         function define_int () {
1145                 eval $1="$2"
1146                 echo "$1=$2"                    >>$CONFIG
1147                 echo "#define $1 ($2)"          >>$CONFIG_H
1148         }
1149
1150         function define_string () {
1151                 eval $1="$2"
1152                 echo "$1=\"$2\""                >>$CONFIG
1153                 echo "#define $1 \"$2\""        >>$CONFIG_H
1154         }
1155
1156         function define_bool () {
1157                 define_tristate "$1" "$2"
1158         }
1159
1160         function define_tristate () {
1161                 eval $1="$2"
1162
1163                 case "$2" in
1164                 y)
1165                         echo "$1=y"             >>$CONFIG
1166                         echo "#define $1 1"     >>$CONFIG_H
1167                         ;;
1168
1169                 m)
1170                         if [ "$CONFIG_MODULES" = "y" ]
1171                         then
1172                                 echo "$1=m"                >>$CONFIG
1173                                 echo "#undef  $1"          >>$CONFIG_H
1174                                 echo "#define $1_MODULE 1" >>$CONFIG_H
1175                         else
1176                                 echo "$1=y"             >>$CONFIG
1177                                 echo "#define $1 1"     >>$CONFIG_H
1178                         fi
1179                         ;;
1180
1181                 n)
1182                         echo "# $1 is not set"  >>$CONFIG
1183                         echo "#undef  $1"       >>$CONFIG_H
1184                         ;;
1185                 esac
1186         }
1187
1188         function choice () {
1189                 #
1190                 # Find the first choice that's already set to 'y'
1191                 #
1192                 choices="$2"
1193                 default="$3"
1194                 current=
1195
1196                 set -- $choices
1197                 while [ -n "$2" ]
1198                 do
1199                         if eval [ "_\$$2" = "_y" ]
1200                         then
1201                                 current=$1
1202                                 break
1203                         fi
1204                         shift ; shift
1205                 done
1206
1207                 #
1208                 # Use the default if none were set.
1209                 #
1210                 : ${current:=$default}
1211
1212                 #
1213                 # Output all choices (to be compatible with other configs).
1214                 #
1215                 set -- $choices
1216                 while [ -n "$2" ]
1217                 do
1218                         if eval [ "$1" = "$current" ]
1219                         then
1220                             define_bool "$2" "y"
1221                         else
1222                             define_bool "$2" "n"
1223                         fi
1224                         shift ; shift
1225                 done
1226         }
1227
1228         function mainmenu_name () {
1229                 :
1230         }
1231
1232         function mainmenu_option () {
1233                 comment_is_option=TRUE
1234         }
1235
1236         function endmenu () {
1237                 :
1238         }
1239
1240         function comment () {
1241                 if [ "$comment_is_option" ]
1242                 then
1243                         comment_is_option=
1244                         echo        >>$CONFIG
1245                         echo "#"    >>$CONFIG
1246                         echo "# $1" >>$CONFIG
1247                         echo "#"    >>$CONFIG
1248
1249                         echo         >>$CONFIG_H
1250                         echo "/*"    >>$CONFIG_H
1251                         echo " * $1" >>$CONFIG_H
1252                         echo " */"   >>$CONFIG_H
1253                 fi
1254         }
1255
1256         echo -n "."
1257
1258         DEF_CONFIG="${1:-.config}"
1259         DEF_CONFIG_H="include/linux/autoconf.h"
1260
1261         CONFIG=.tmpconfig
1262         CONFIG_H=.tmpconfig.h
1263
1264         echo "#" >$CONFIG
1265         echo "# Automatically generated by make menuconfig: don't edit" >>$CONFIG
1266         echo "#" >>$CONFIG
1267
1268         echo "/*" >$CONFIG_H
1269         echo " * Automatically generated by make menuconfig: don't edit" >>$CONFIG_H
1270         echo " */" >>$CONFIG_H
1271         echo "#define AUTOCONF_INCLUDED" >> $CONFIG_H
1272
1273         echo -n "."
1274         if . $CONFIG_IN >>.menuconfig.log 2>&1
1275         then
1276                 if [ "$DEF_CONFIG" = ".config" ]
1277                 then
1278                         mv $CONFIG_H $DEF_CONFIG_H
1279                 fi
1280
1281                 if [ -f "$DEF_CONFIG" ]
1282                 then
1283                         rm -f ${DEF_CONFIG}.old
1284                         mv $DEF_CONFIG ${DEF_CONFIG}.old
1285                 fi
1286
1287                 mv $CONFIG $DEF_CONFIG
1288
1289                 return 0
1290         else
1291                 return 1
1292         fi
1293 }
1294
1295 #
1296 # Remove temporary files
1297 #
1298 cleanup () {
1299         cleanup1
1300         cleanup2
1301 }
1302
1303 cleanup1 () {
1304         rm -f MCmenu* MCradiolists MCdialog.out help.out
1305 }
1306
1307 cleanup2 () {
1308         rm -f .tmpconfig .tmpconfig.h
1309 }
1310
1311 set_geometry () {
1312         # Some distributions export these with incorrect values
1313         # which can really screw up some ncurses programs.
1314         LINES=  COLUMNS=
1315
1316         ROWS=${1:-24}  COLS=${2:-80}
1317
1318         # Just in case the nasty rlogin bug returns.
1319         #
1320         [ $ROWS = 0 ] && ROWS=24
1321         [ $COLS = 0 ] && COLS=80
1322
1323         if [ $ROWS -lt 19 -o $COLS -lt 80 ]
1324         then
1325                 echo -e "\n\007Your display is too small to run Menuconfig!"
1326                 echo "It must be at least 19 lines by 80 columns."
1327                 exit 0
1328         fi
1329
1330         ROWS=$((ROWS-4))  COLS=$((COLS-5))
1331 }
1332
1333
1334 set_geometry `stty size 2>/dev/null`
1335
1336 menu_instructions="\
1337 Arrow keys navigate the menu.  \
1338 <Enter> selects submenus --->.  \
1339 Highlighted letters are hotkeys.  \
1340 Pressing <Y> includes, <N> excludes, <M> modularizes features.  \
1341 Press <Esc><Esc> to exit, <?> for Help.  \
1342 Legend: [*] built-in  [ ] excluded  <M> module  < > module capable"
1343
1344 radiolist_instructions="\
1345 Use the arrow keys to navigate this window or \
1346 press the hotkey of the item you wish to select \
1347 followed by the <SPACE BAR>.
1348 Press <?> for additional information about this option."
1349
1350 inputbox_instructions_int="\
1351 Please enter a decimal value. \
1352 Fractions will not be accepted.  \
1353 Use the <TAB> key to move from the input field to the buttons below it."
1354
1355 inputbox_instructions_hex="\
1356 Please enter a hexadecimal value. \
1357 Use the <TAB> key to move from the input field to the buttons below it."
1358
1359 inputbox_instructions_string="\
1360 Please enter a string value. \
1361 Use the <TAB> key to move from the input field to the buttons below it."
1362
1363 DIALOG="./scripts/lxdialog/lxdialog"
1364
1365 kernel_version="${VERSION}.${PATCHLEVEL}.${SUBLEVEL}${EXTRAVERSION}"
1366
1367 backtitle="Linux Kernel v$kernel_version Configuration"
1368
1369 trap "cleanup ; exit 1" 1 2 15
1370
1371
1372 #
1373 # Locate default files.
1374 #
1375 CONFIG_IN=./config.in
1376 if [ "$1" != "" ] ; then
1377         CONFIG_IN=$1
1378 fi
1379
1380 DEFAULTS=arch/$ARCH/defconfig
1381 if [ -f .config ]; then
1382   DEFAULTS=.config
1383 fi
1384
1385 if [ -f $DEFAULTS ]
1386 then
1387   echo "Using defaults found in" $DEFAULTS
1388   load_config_file $DEFAULTS
1389 else
1390   echo "No defaults found"
1391 fi
1392
1393
1394 # Fresh new log.
1395 >.menuconfig.log
1396
1397 # Load the functions used by the config.in files.
1398 echo -n "Preparing scripts: functions"
1399 load_functions
1400
1401 if [ ! -e $CONFIG_IN ]
1402 then
1403         echo "Your main config.in file ($CONFIG_IN) does not exist"
1404         exit 1
1405 fi
1406
1407 if [ ! -x $DIALOG ]
1408 then
1409         echo "Your lxdialog utility does not exist"
1410         exit 1
1411 fi
1412
1413 #
1414 # Read config.in files and parse them into one shell function per menu.
1415 #
1416 echo -n ", parsing"
1417 parse_config_files $CONFIG_IN
1418
1419 echo "done."
1420 #
1421 # Start the ball rolling from the top.
1422 #
1423 activate_menu MCmenu0
1424
1425 #
1426 # All done!
1427 #
1428 cleanup1
1429
1430 #
1431 # Confirm and Save
1432 #
1433 if $DIALOG --backtitle "$backtitle" \
1434            --yesno "Do you wish to save your new kernel configuration?" 5 60
1435 then
1436         save_configuration
1437         echo
1438         echo
1439         echo "*** End of Linux kernel configuration."
1440         echo "*** Check the top-level Makefile for additional configuration."
1441         if [ ! -f .hdepend -o "$CONFIG_MODVERSIONS" = "y" ] ; then
1442             echo "*** Next, you must run 'make dep'."
1443         else
1444             echo "*** Next, you may run 'make zImage', 'make zdisk', or 'make zlilo.'"
1445         fi
1446         echo
1447 else
1448         echo
1449         echo
1450         echo Your kernel configuration changes were NOT saved.
1451         echo
1452 fi
1453
1454 # Remove log if empty.
1455 if [ ! -s .menuconfig.log ] ; then
1456         rm -f .menuconfig.log
1457 fi
1458
1459 exit 0