Linux Audio

Check our new training course

Embedded Linux Audio

Check our new training course
with Creative Commons CC-BY-SA
lecture materials

Bootlin logo

Elixir Cross Referencer

Loading...
   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
/*
 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
 * Released under the terms of the GNU GPL v2.0.
 *
 * Introduced single menu mode (show all sub-menus in one large tree).
 * 2002-11-06 Petr Baudis <pasky@ucw.cz>
 *
 * i18n, 2005, Arnaldo Carvalho de Melo <acme@conectiva.com.br>
 */

#define _XOPEN_SOURCE 700

#include <sys/ioctl.h>
#include <sys/wait.h>
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <strings.h> /* for strcasecmp */
#include <termios.h>
#include <unistd.h>
#include <locale.h>

#define LKC_DIRECT_LINK
#include "lkc.h"

static char menu_backtitle[128];
static const char mconf_readme[] = N_(
"Overview\n"
"--------\n"
"Some features may be built directly into busybox.\n"
"Some may be made into standalone applets.  Some features\n"
"may be completely removed altogether.  There are also certain\n"
"parameters which are not really features, but must be\n"
"entered in as decimal or hexadecimal numbers or possibly text.\n"
"\n"
"Menu items beginning with [*], <M> or [ ] represent features\n"
"configured to be built in, modularized or removed respectively.\n"
"Pointed brackets <> represent module capable features.\n"
"\n"
"To change any of these features, highlight it with the cursor\n"
"keys and press <Y> to build it in, <M> to make it a module or\n"
"<N> to removed it.  You may also press the <Space Bar> to cycle\n"
"through the available options (ie. Y->N->M->Y).\n"
"\n"
"Some additional keyboard hints:\n"
"\n"
"Menus\n"
"----------\n"
"o  Use the Up/Down arrow keys (cursor keys) to highlight the item\n"
"   you wish to change or submenu wish to select and press <Enter>.\n"
"   Submenus are designated by \"--->\".\n"
"\n"
"   Shortcut: Press the option's highlighted letter (hotkey).\n"
"             Pressing a hotkey more than once will sequence\n"
"             through all visible items which use that hotkey.\n"
"\n"
"   You may also use the <PAGE UP> and <PAGE DOWN> keys to scroll\n"
"   unseen options into view.\n"
"\n"
"o  To exit a menu use the cursor keys to highlight the <Exit> button\n"
"   and press <ENTER>.\n"
"\n"
"   Shortcut: Press <ESC><ESC> or <E> or <X> if there is no hotkey\n"
"             using those letters.  You may press a single <ESC>, but\n"
"             there is a delayed response which you may find annoying.\n"
"\n"
"   Also, the <TAB> and cursor keys will cycle between <Select>,\n"
"   <Exit> and <Help>\n"
"\n"
"o  To get help with an item, use the cursor keys to highlight <Help>\n"
"   and Press <ENTER>.\n"
"\n"
"   Shortcut: Press <H> or <?>.\n"
"\n"
"\n"
"Radiolists  (Choice lists)\n"
"-----------\n"
"o  Use the cursor keys to select the option you wish to set and press\n"
"   <S> or the <SPACE BAR>.\n"
"\n"
"   Shortcut: Press the first letter of the option you wish to set then\n"
"             press <S> or <SPACE BAR>.\n"
"\n"
"o  To see available help for the item, use the cursor keys to highlight\n"
"   <Help> and Press <ENTER>.\n"
"\n"
"   Shortcut: Press <H> or <?>.\n"
"\n"
"   Also, the <TAB> and cursor keys will cycle between <Select> and\n"
"   <Help>\n"
"\n"
"\n"
"Data Entry\n"
"-----------\n"
"o  Enter the requested information and press <ENTER>\n"
"   If you are entering hexadecimal values, it is not necessary to\n"
"   add the '0x' prefix to the entry.\n"
"\n"
"o  For help, use the <TAB> or cursor keys to highlight the help option\n"
"   and press <ENTER>.  You can try <TAB><H> as well.\n"
"\n"
"\n"
"Text Box    (Help Window)\n"
"--------\n"
"o  Use the cursor keys to scroll up/down/left/right.  The VI editor\n"
"   keys h,j,k,l function here as do <SPACE BAR> and <B> for those\n"
"   who are familiar with less and lynx.\n"
"\n"
"o  Press <E>, <X>, <Enter> or <Esc><Esc> to exit.\n"
"\n"
"\n"
"Alternate Configuration Files\n"
"-----------------------------\n"
"Menuconfig supports the use of alternate configuration files for\n"
"those who, for various reasons, find it necessary to switch\n"
"between different configurations.\n"
"\n"
"At the end of the main menu you will find two options.  One is\n"
"for saving the current configuration to a file of your choosing.\n"
"The other option is for loading a previously saved alternate\n"
"configuration.\n"
"\n"
"Even if you don't use alternate configuration files, but you\n"
"find during a Menuconfig session that you have completely messed\n"
"up your settings, you may use the \"Load Alternate...\" option to\n"
"restore your previously saved settings from \".config\" without\n"
"restarting Menuconfig.\n"
"\n"
"Other information\n"
"-----------------\n"
"If you use Menuconfig in an XTERM window make sure you have your\n"
"$TERM variable set to point to a xterm definition which supports color.\n"
"Otherwise, Menuconfig will look rather bad.  Menuconfig will not\n"
"display correctly in a RXVT window because rxvt displays only one\n"
"intensity of color, bright.\n"
"\n"
"Menuconfig will display larger menus on screens or xterms which are\n"
"set to display more than the standard 25 row by 80 column geometry.\n"
"In order for this to work, the \"stty size\" command must be able to\n"
"display the screen's current row and column geometry.  I STRONGLY\n"
"RECOMMEND that you make sure you do NOT have the shell variables\n"
"LINES and COLUMNS exported into your environment.  Some distributions\n"
"export those variables via /etc/profile.  Some ncurses programs can\n"
"become confused when those variables (LINES & COLUMNS) don't reflect\n"
"the true screen size.\n"
"\n"
"Optional personality available\n"
"------------------------------\n"
"If you prefer to have all of the options listed in a single\n"
"menu, rather than the default multimenu hierarchy, run the menuconfig\n"
"with MENUCONFIG_MODE environment variable set to single_menu. Example:\n"
"\n"
"make MENUCONFIG_MODE=single_menu menuconfig\n"
"\n"
"<Enter> will then unroll the appropriate category, or enfold it if it\n"
"is already unrolled.\n"
"\n"
"Note that this mode can eventually be a little more CPU expensive\n"
"(especially with a larger number of unrolled categories) than the\n"
"default mode.\n"),
menu_instructions[] = N_(
	"Arrow keys navigate the menu.  "
	"<Enter> selects submenus --->.  "
	"Highlighted letters are hotkeys.  "
	"Pressing <Y> includes, <N> excludes, <M> modularizes features.  "
	"Press <Esc><Esc> to exit, <?> for Help, </> for Search.  "
	"Legend: [*] built-in  [ ] excluded  <M> module  < > module capable"),
radiolist_instructions[] = N_(
	"Use the arrow keys to navigate this window or "
	"press the hotkey of the item you wish to select "
	"followed by the <SPACE BAR>. "
	"Press <?> for additional information about this option."),
inputbox_instructions_int[] = N_(
	"Please enter a decimal value. "
	"Fractions will not be accepted.  "
	"Use the <TAB> key to move from the input field to the buttons below it."),
inputbox_instructions_hex[] = N_(
	"Please enter a hexadecimal value. "
	"Use the <TAB> key to move from the input field to the buttons below it."),
inputbox_instructions_string[] = N_(
	"Please enter a string value. "
	"Use the <TAB> key to move from the input field to the buttons below it."),
setmod_text[] = N_(
	"This feature depends on another which has been configured as a module.\n"
	"As a result, this feature will be built as a module."),
nohelp_text[] = N_(
	"There is no help available for this option.\n"),
load_config_text[] = N_(
	"Enter the name of the configuration file you wish to load.  "
	"Accept the name shown to restore the configuration you "
	"last retrieved.  Leave blank to abort."),
load_config_help[] = N_(
	"\n"
	"For various reasons, one may wish to keep several different\n"
	"configurations available on a single machine.\n"
	"\n"
	"If you have saved a previous configuration in a file other than\n"
	"default, entering the name of the file here will allow you\n"
	"to modify that configuration.\n"
	"\n"
	"If you are uncertain, then you have probably never used alternate\n"
	"configuration files.  You should therefor leave this blank to abort.\n"),
save_config_text[] = N_(
	"Enter a filename to which this configuration should be saved "
	"as an alternate.  Leave blank to abort."),
save_config_help[] = N_(
	"\n"
	"For various reasons, one may wish to keep different\n"
	"configurations available on a single machine.\n"
	"\n"
	"Entering a file name here will allow you to later retrieve, modify\n"
	"and use the current configuration as an alternate to whatever\n"
	"configuration options you have selected at that time.\n"
	"\n"
	"If you are uncertain what all this means then you should probably\n"
	"leave this blank.\n"),
search_help[] = N_(
	"\n"
	"Search for CONFIG_ symbols and display their relations.\n"
	"Regular expressions are allowed.\n"
	"Example: search for \"^FOO\"\n"
	"Result:\n"
	"-----------------------------------------------------------------\n"
	"Symbol: FOO [=m]\n"
	"Prompt: Foo bus is used to drive the bar HW\n"
	"Defined at drivers/pci/Kconfig:47\n"
	"Depends on: X86_LOCAL_APIC && X86_IO_APIC || IA64\n"
	"Location:\n"
	"  -> Bus options (PCI, PCMCIA, EISA, MCA, ISA)\n"
	"    -> PCI support (PCI [=y])\n"
	"      -> PCI access mode (<choice> [=y])\n"
	"Selects: LIBCRC32\n"
	"Selected by: BAR\n"
	"-----------------------------------------------------------------\n"
	"o The line 'Prompt:' shows the text used in the menu structure for\n"
	"  this CONFIG_ symbol\n"
	"o The 'Defined at' line tell at what file / line number the symbol\n"
	"  is defined\n"
	"o The 'Depends on:' line tell what symbols needs to be defined for\n"
	"  this symbol to be visible in the menu (selectable)\n"
	"o The 'Location:' lines tell where in the menu structure this symbol\n"
	"  is located\n"
	"    A location followed by a [=y] indicate that this is a selectable\n"
	"    menu item - and current value is displayed inside brackets.\n"
	"o The 'Selects:' line tell what symbol will be automatically\n"
	"  selected if this symbol is selected (y or m)\n"
	"o The 'Selected by' line tell what symbol has selected this symbol\n"
	"\n"
	"Only relevant lines are shown.\n"
	"\n\n"
	"Search examples:\n"
	"Examples: USB	=> find all CONFIG_ symbols containing USB\n"
	"          ^USB => find all CONFIG_ symbols starting with USB\n"
	"          USB$ => find all CONFIG_ symbols ending with USB\n"
	"\n");

static char buf[4096*10], *bufptr = buf;
static char input_buf[4096];
static const char filename[] = ".config";
static char *args[1024], **argptr = args;
static int indent;
static struct termios ios_org;
static int rows = 0, cols = 0;
static struct menu *current_menu;
static int child_count;
static int do_resize;
static int single_menu_mode;

static void conf(struct menu *menu);
static void conf_choice(struct menu *menu);
static void conf_string(struct menu *menu);
static void conf_load(void);
static void conf_save(void);
static void show_textbox(const char *title, const char *text, int r, int c);
static void show_helptext(const char *title, const char *text);
static void show_help(struct menu *menu);
static void show_file(const char *filename, const char *title, int r, int c);

static void cprint_init(void);
static int cprint1(const char *fmt, ...);
static void cprint_done(void);
static int cprint(const char *fmt, ...);

static void init_wsize(void)
{
	struct winsize ws;
	char *env;

	if (!ioctl(STDIN_FILENO, TIOCGWINSZ, &ws)) {
		rows = ws.ws_row;
		cols = ws.ws_col;
	}

	if (!rows) {
		env = getenv("LINES");
		if (env)
			rows = atoi(env);
		if (!rows)
			rows = 24;
	}
	if (!cols) {
		env = getenv("COLUMNS");
		if (env)
			cols = atoi(env);
		if (!cols)
			cols = 80;
	}

	if (rows < 19 || cols < 80) {
		fprintf(stderr, N_("Your display is too small to run Menuconfig!\n"));
		fprintf(stderr, N_("It must be at least 19 lines by 80 columns.\n"));
		exit(1);
	}

	rows -= 4;
	cols -= 5;
}

static void cprint_init(void)
{
	bufptr = buf;
	argptr = args;
	memset(args, 0, sizeof(args));
	indent = 0;
	child_count = 0;
	cprint("./scripts/kconfig/lxdialog/lxdialog");
	cprint("--backtitle");
	cprint(menu_backtitle);
}

static int cprint1(const char *fmt, ...)
{
	va_list ap;
	int res;

	if (!*argptr)
		*argptr = bufptr;
	va_start(ap, fmt);
	res = vsprintf(bufptr, fmt, ap);
	va_end(ap);
	bufptr += res;

	return res;
}

static void cprint_done(void)
{
	*bufptr++ = 0;
	argptr++;
}

static int cprint(const char *fmt, ...)
{
	va_list ap;
	int res;

	*argptr++ = bufptr;
	va_start(ap, fmt);
	res = vsprintf(bufptr, fmt, ap);
	va_end(ap);
	bufptr += res;
	*bufptr++ = 0;

	return res;
}

static void get_prompt_str(struct gstr *r, struct property *prop)
{
	int i, j;
	struct menu *submenu[8], *menu;

	str_printf(r, "Prompt: %s\n", prop->text);
	str_printf(r, "  Defined at %s:%d\n", prop->menu->file->name,
		prop->menu->lineno);
	if (!expr_is_yes(prop->visible.expr)) {
		str_append(r, "  Depends on: ");
		expr_gstr_print(prop->visible.expr, r);
		str_append(r, "\n");
	}
	menu = prop->menu->parent;
	for (i = 0; menu != &rootmenu && i < 8; menu = menu->parent)
		submenu[i++] = menu;
	if (i > 0) {
		str_printf(r, "  Location:\n");
		for (j = 4; --i >= 0; j += 2) {
			menu = submenu[i];
			str_printf(r, "%*c-> %s", j, ' ', menu_get_prompt(menu));
			if (menu->sym) {
				str_printf(r, " (%s [=%s])", menu->sym->name ?
					menu->sym->name : "<choice>",
					sym_get_string_value(menu->sym));
			}
			str_append(r, "\n");
		}
	}
}

static void get_symbol_str(struct gstr *r, struct symbol *sym)
{
	bool hit;
	struct property *prop;

	str_printf(r, "Symbol: %s [=%s]\n", sym->name,
	                               sym_get_string_value(sym));
	for_all_prompts(sym, prop)
		get_prompt_str(r, prop);
	hit = false;
	for_all_properties(sym, prop, P_SELECT) {
		if (!hit) {
			str_append(r, "  Selects: ");
			hit = true;
		} else
			str_printf(r, " && ");
		expr_gstr_print(prop->expr, r);
	}
	if (hit)
		str_append(r, "\n");
	if (sym->rev_dep.expr) {
		str_append(r, "  Selected by: ");
		expr_gstr_print(sym->rev_dep.expr, r);
		str_append(r, "\n");
	}
	str_append(r, "\n\n");
}

static struct gstr get_relations_str(struct symbol **sym_arr)
{
	struct symbol *sym;
	struct gstr res = str_new();
	int i;

	for (i = 0; sym_arr && (sym = sym_arr[i]); i++)
		get_symbol_str(&res, sym);
	if (!i)
		str_append(&res, "No matches found.\n");
	return res;
}

pid_t pid;

static void winch_handler(int sig)
{
	if (!do_resize) {
		kill(pid, SIGINT);
		do_resize = 1;
	}
}

static int exec_conf(void)
{
	int pipefd[2], stat, size;
	struct sigaction sa;
	sigset_t sset, osset;

	sigemptyset(&sset);
	sigaddset(&sset, SIGINT);
	sigprocmask(SIG_BLOCK, &sset, &osset);

	signal(SIGINT, SIG_DFL);

	sa.sa_handler = winch_handler;
	sigemptyset(&sa.sa_mask);
	sa.sa_flags = SA_RESTART;
	sigaction(SIGWINCH, &sa, NULL);

	*argptr++ = NULL;

	pipe(pipefd);
	pid = fork();
	if (pid == 0) {
		sigprocmask(SIG_SETMASK, &osset, NULL);
		dup2(pipefd[1], 2);
		close(pipefd[0]);
		close(pipefd[1]);
		execv(args[0], args);
		_exit(EXIT_FAILURE);
	}

	close(pipefd[1]);
	bufptr = input_buf;
	while (1) {
		size = input_buf + sizeof(input_buf) - bufptr;
		size = read(pipefd[0], bufptr, size);
		if (size <= 0) {
			if (size < 0) {
				if (errno == EINTR || errno == EAGAIN)
					continue;
				perror("read");
			}
			break;
		}
		bufptr += size;
	}
	*bufptr++ = 0;
	close(pipefd[0]);
	waitpid(pid, &stat, 0);

	if (do_resize) {
		init_wsize();
		do_resize = 0;
		sigprocmask(SIG_SETMASK, &osset, NULL);
		return -1;
	}
	if (WIFSIGNALED(stat)) {
		printf("\finterrupted(%d)\n", WTERMSIG(stat));
		exit(1);
	}
#if 0
	printf("\fexit state: %d\nexit data: '%s'\n", WEXITSTATUS(stat), input_buf);
	sleep(1);
#endif
	sigpending(&sset);
	if (sigismember(&sset, SIGINT)) {
		printf("\finterrupted\n");
		exit(1);
	}
	sigprocmask(SIG_SETMASK, &osset, NULL);

	return WEXITSTATUS(stat);
}

static void search_conf(void)
{
	struct symbol **sym_arr;
	int stat;
	struct gstr res;

again:
	cprint_init();
	cprint("--title");
	cprint(_("Search Configuration Parameter"));
	cprint("--inputbox");
	cprint(_("Enter CONFIG_ (sub)string to search for (omit CONFIG_)"));
	cprint("10");
	cprint("75");
	cprint("");
	stat = exec_conf();
	if (stat < 0)
		goto again;
	switch (stat) {
	case 0:
		break;
	case 1:
		show_helptext(_("Search Configuration"), search_help);
		goto again;
	default:
		return;
	}

	sym_arr = sym_re_search(input_buf);
	res = get_relations_str(sym_arr);
	free(sym_arr);
	show_textbox(_("Search Results"), str_get(&res), 0, 0);
	str_free(&res);
}

static void build_conf(struct menu *menu)
{
	struct symbol *sym;
	struct property *prop;
	struct menu *child;
	int type, tmp, doint = 2;
	tristate val;
	char ch;

	if (!menu_is_visible(menu))
		return;

	sym = menu->sym;
	prop = menu->prompt;
	if (!sym) {
		if (prop && menu != current_menu) {
			const char *prompt = menu_get_prompt(menu);
			switch (prop->type) {
			case P_MENU:
				child_count++;
				cprint("m%p", menu);

				if (single_menu_mode) {
					cprint1("%s%*c%s",
						menu->data ? "-->" : "++>",
						indent + 1, ' ', prompt);
				} else
					cprint1("   %*c%s  --->", indent + 1, ' ', prompt);

				cprint_done();
				if (single_menu_mode && menu->data)
					goto conf_childs;
				return;
			default:
				if (prompt) {
					child_count++;
					cprint(":%p", menu);
					cprint("---%*c%s", indent + 1, ' ', prompt);
				}
			}
		} else
			doint = 0;
		goto conf_childs;
	}

	type = sym_get_type(sym);
	if (sym_is_choice(sym)) {
		struct symbol *def_sym = sym_get_choice_value(sym);
		struct menu *def_menu = NULL;

		child_count++;
		for (child = menu->list; child; child = child->next) {
			if (menu_is_visible(child) && child->sym == def_sym)
				def_menu = child;
		}

		val = sym_get_tristate_value(sym);
		if (sym_is_changable(sym)) {
			cprint("t%p", menu);
			switch (type) {
			case S_BOOLEAN:
				cprint1("[%c]", val == no ? ' ' : '*');
				break;
			case S_TRISTATE:
				switch (val) {
				case yes: ch = '*'; break;
				case mod: ch = 'M'; break;
				default:  ch = ' '; break;
				}
				cprint1("<%c>", ch);
				break;
			}
		} else {
			cprint("%c%p", def_menu ? 't' : ':', menu);
			cprint1("   ");
		}

		cprint1("%*c%s", indent + 1, ' ', menu_get_prompt(menu));
		if (val == yes) {
			if (def_menu) {
				cprint1(" (%s)", menu_get_prompt(def_menu));
				cprint1("  --->");
				cprint_done();
				if (def_menu->list) {
					indent += 2;
					build_conf(def_menu);
					indent -= 2;
				}
			} else
				cprint_done();
			return;
		}
		cprint_done();
	} else {
		if (menu == current_menu) {
			cprint(":%p", menu);
			cprint("---%*c%s", indent + 1, ' ', menu_get_prompt(menu));
			goto conf_childs;
		}
		child_count++;
		val = sym_get_tristate_value(sym);
		if (sym_is_choice_value(sym) && val == yes) {
			cprint(":%p", menu);
			cprint1("   ");
		} else {
			switch (type) {
			case S_BOOLEAN:
				cprint("t%p", menu);
				if (sym_is_changable(sym))
					cprint1("[%c]", val == no ? ' ' : '*');
				else
					cprint1("---");
				break;
			case S_TRISTATE:
				cprint("t%p", menu);
				switch (val) {
				case yes: ch = '*'; break;
				case mod: ch = 'M'; break;
				default:  ch = ' '; break;
				}
				if (sym_is_changable(sym))
					cprint1("<%c>", ch);
				else
					cprint1("---");
				break;
			default:
				cprint("s%p", menu);
				tmp = cprint1("(%s)", sym_get_string_value(sym));
				tmp = indent - tmp + 4;
				if (tmp < 0)
					tmp = 0;
				cprint1("%*c%s%s", tmp, ' ', menu_get_prompt(menu),
					(sym_has_value(sym) || !sym_is_changable(sym)) ?
					"" : " (NEW)");
				cprint_done();
				goto conf_childs;
			}
		}
		cprint1("%*c%s%s", indent + 1, ' ', menu_get_prompt(menu),
			(sym_has_value(sym) || !sym_is_changable(sym)) ?
			"" : " (NEW)");
		if (menu->prompt->type == P_MENU) {
			cprint1("  --->");
			cprint_done();
			return;
		}
		cprint_done();
	}

conf_childs:
	indent += doint;
	for (child = menu->list; child; child = child->next)
		build_conf(child);
	indent -= doint;
}

static void conf(struct menu *menu)
{
	struct menu *submenu;
	const char *prompt = menu_get_prompt(menu);
	struct symbol *sym;
	char active_entry[40];
	int stat, type, i;

	unlink("lxdialog.scrltmp");
	active_entry[0] = 0;
	while (1) {
		cprint_init();
		cprint("--title");
		cprint("%s", prompt ? prompt : _("Main Menu"));
		cprint("--menu");
		cprint(_(menu_instructions));
		cprint("%d", rows);
		cprint("%d", cols);
		cprint("%d", rows - 10);
		cprint("%s", active_entry);
		current_menu = menu;
		build_conf(menu);
		if (!child_count)
			break;
		if (menu == &rootmenu) {
			cprint(":");
			cprint("--- ");
			cprint("L");
			cprint(_("    Load an Alternate Configuration File"));
			cprint("S");
			cprint(_("    Save Configuration to an Alternate File"));
		}
		stat = exec_conf();
		if (stat < 0)
			continue;

		if (stat == 1 || stat == 255)
			break;

		type = input_buf[0];
		if (!type)
			continue;

		for (i = 0; input_buf[i] && !isspace(input_buf[i]); i++)
			;
		if (i >= sizeof(active_entry))
			i = sizeof(active_entry) - 1;
		input_buf[i] = 0;
		strcpy(active_entry, input_buf);

		sym = NULL;
		submenu = NULL;
		if (sscanf(input_buf + 1, "%p", &submenu) == 1)
			sym = submenu->sym;

		switch (stat) {
		case 0:
			switch (type) {
			case 'm':
				if (single_menu_mode)
					submenu->data = (void *) (long) !submenu->data;
				else
					conf(submenu);
				break;
			case 't':
				if (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)
					conf_choice(submenu);
				else if (submenu->prompt->type == P_MENU)
					conf(submenu);
				break;
			case 's':
				conf_string(submenu);
				break;
			case 'L':
				conf_load();
				break;
			case 'S':
				conf_save();
				break;
			}
			break;
		case 2:
			if (sym)
				show_help(submenu);
			else
				show_helptext("README", _(mconf_readme));
			break;
		case 3:
			if (type == 't') {
				if (sym_set_tristate_value(sym, yes))
					break;
				if (sym_set_tristate_value(sym, mod))
					show_textbox(NULL, setmod_text, 6, 74);
			}
			break;
		case 4:
			if (type == 't')
				sym_set_tristate_value(sym, no);
			break;
		case 5:
			if (type == 't')
				sym_set_tristate_value(sym, mod);
			break;
		case 6:
			if (type == 't')
				sym_toggle_tristate_value(sym);
			else if (type == 'm')
				conf(submenu);
			break;
		case 7:
			search_conf();
			break;
		}
	}
}

static void show_textbox(const char *title, const char *text, int r, int c)
{
	int fd;

	fd = creat(".help.tmp", 0777);
	write(fd, text, strlen(text));
	close(fd);
	show_file(".help.tmp", title, r, c);
	unlink(".help.tmp");
}

static void show_helptext(const char *title, const char *text)
{
	show_textbox(title, text, 0, 0);
}

static void show_help(struct menu *menu)
{
	struct gstr help = str_new();
	struct symbol *sym = menu->sym;

	if (sym->help)
	{
		if (sym->name) {
			str_printf(&help, "CONFIG_%s:\n\n", sym->name);
			str_append(&help, _(sym->help));
			str_append(&help, "\n");
		}
	} else {
		str_append(&help, nohelp_text);
	}
	get_symbol_str(&help, sym);
	show_helptext(menu_get_prompt(menu), str_get(&help));
	str_free(&help);
}

static void show_file(const char *filename, const char *title, int r, int c)
{
	do {
		cprint_init();
		if (title) {
			cprint("--title");
			cprint("%s", title);
		}
		cprint("--textbox");
		cprint("%s", filename);
		cprint("%d", r ? r : rows);
		cprint("%d", c ? c : cols);
	} while (exec_conf() < 0);
}

static void conf_choice(struct menu *menu)
{
	const char *prompt = menu_get_prompt(menu);
	struct menu *child;
	struct symbol *active;
	int stat;

	active = sym_get_choice_value(menu->sym);
	while (1) {
		cprint_init();
		cprint("--title");
		cprint("%s", prompt ? prompt : _("Main Menu"));
		cprint("--radiolist");
		cprint(_(radiolist_instructions));
		cprint("15");
		cprint("70");
		cprint("6");

		current_menu = menu;
		for (child = menu->list; child; child = child->next) {
			if (!menu_is_visible(child))
				continue;
			cprint("%p", child);
			cprint("%s", menu_get_prompt(child));
			if (child->sym == sym_get_choice_value(menu->sym))
				cprint("ON");
			else if (child->sym == active)
				cprint("SELECTED");
			else
				cprint("OFF");
		}

		stat = exec_conf();
		switch (stat) {
		case 0:
			if (sscanf(input_buf, "%p", &child) != 1)
				break;
			sym_set_tristate_value(child->sym, yes);
			return;
		case 1:
			if (sscanf(input_buf, "%p", &child) == 1) {
				show_help(child);
				active = child->sym;
			} else
				show_help(menu);
			break;
		case 255:
			return;
		}
	}
}

static void conf_string(struct menu *menu)
{
	const char *prompt = menu_get_prompt(menu);
	int stat;

	while (1) {
		cprint_init();
		cprint("--title");
		cprint("%s", prompt ? prompt : _("Main Menu"));
		cprint("--inputbox");
		switch (sym_get_type(menu->sym)) {
		case S_INT:
			cprint(_(inputbox_instructions_int));
			break;
		case S_HEX:
			cprint(_(inputbox_instructions_hex));
			break;
		case S_STRING:
			cprint(_(inputbox_instructions_string));
			break;
		default:
			/* panic? */;
		}
		cprint("10");
		cprint("75");
		cprint("%s", sym_get_string_value(menu->sym));
		stat = exec_conf();
		switch (stat) {
		case 0:
			if (sym_set_string_value(menu->sym, input_buf))
				return;
			show_textbox(NULL, _("You have made an invalid entry."), 5, 43);
			break;
		case 1:
			show_help(menu);
			break;
		case 255:
			return;
		}
	}
}

static void conf_load(void)
{
	int stat;

	while (1) {
		cprint_init();
		cprint("--inputbox");
		cprint(load_config_text);
		cprint("11");
		cprint("55");
		cprint("%s", filename);
		stat = exec_conf();
		switch(stat) {
		case 0:
			if (!input_buf[0])
				return;
			if (!conf_read(input_buf))
				return;
			show_textbox(NULL, _("File does not exist!"), 5, 38);
			break;
		case 1:
			show_helptext(_("Load Alternate Configuration"), load_config_help);
			break;
		case 255:
			return;
		}
	}
}

static void conf_save(void)
{
	int stat;

	while (1) {
		cprint_init();
		cprint("--inputbox");
		cprint(save_config_text);
		cprint("11");
		cprint("55");
		cprint("%s", filename);
		stat = exec_conf();
		switch(stat) {
		case 0:
			if (!input_buf[0])
				return;
			if (!conf_write(input_buf))
				return;
			show_textbox(NULL, _("Can't create file!  Probably a nonexistent directory."), 5, 60);
			break;
		case 1:
			show_helptext(_("Save Alternate Configuration"), save_config_help);
			break;
		case 255:
			return;
		}
	}
}

static void conf_cleanup(void)
{
	tcsetattr(1, TCSAFLUSH, &ios_org);
	unlink(".help.tmp");
	unlink("lxdialog.scrltmp");
}

int main(int ac, char **av)
{
	struct symbol *sym;
	char *mode;
	int stat;

	setlocale(LC_ALL, "");
	bindtextdomain(PACKAGE, LOCALEDIR);
	textdomain(PACKAGE);

	conf_parse(av[1]);
	conf_read(NULL);

	sym = sym_lookup("KERNELVERSION", 0);
	sym_calc_value(sym);
	sprintf(menu_backtitle, _("BusyBox %s Configuration"),
		sym_get_string_value(sym));

	mode = getenv("MENUCONFIG_MODE");
	if (mode) {
		if (!strcasecmp(mode, "single_menu"))
			single_menu_mode = 1;
	}

	tcgetattr(1, &ios_org);
	atexit(conf_cleanup);
	init_wsize();
	conf(&rootmenu);

	do {
		cprint_init();
		cprint("--yesno");
		cprint(_("Do you wish to save your new configuration?"));
		cprint("5");
		cprint("60");
		stat = exec_conf();
	} while (stat < 0);

	if (stat == 0) {
		if (conf_write(NULL)) {
			fprintf(stderr, _("\n\n"
				"Error during writing of the configuration.\n"
				"Your configuration changes were NOT saved."
				"\n\n"));
			return 1;
		}
		printf(_("\n\n"
			"*** End of configuration.\n"
			"*** Execute 'make' to build the project or try 'make help'."
			"\n\n"));
	} else {
		fprintf(stderr, _("\n\n"
			"Your configuration changes were NOT saved."
			"\n\n"));
	}

	return 0;
}