config/conf.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
   4  */
   5
   6 #include <ctype.h>
   7 #include <limits.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <time.h>
  12 #include <unistd.h>
  13 #include <getopt.h>
  14 #include <sys/stat.h>
  15 #include <sys/time.h>
  16 #include <errno.h>
  17
  18 #include "lkc.h"
  19
  20 static void conf(struct menu *menu);
  21 static void check_conf(struct menu *menu);
  22
  23 enum input_mode {
  24         oldaskconfig,
  25         syncconfig,
  26         oldconfig,
  27         allnoconfig,
  28         allyesconfig,
  29         allmodconfig,
  30         alldefconfig,
  31         randconfig,
  32         defconfig,
  33         savedefconfig,
  34         listnewconfig,
  35         helpnewconfig,
  36         olddefconfig,
  37 };
  38 static enum input_mode input_mode = oldaskconfig;
  39
  40 static int indent = 1;
  41 static int tty_stdio;
  42 static int sync_kconfig;
  43 static int conf_cnt;
  44 static char line[PATH_MAX];
  45 static struct menu *rootEntry;
  46
  47 static void print_help(struct menu *menu)
  48 {
  49         struct gstr help = str_new();
  50
  51         menu_get_ext_help(menu, &help);
  52
  53         printf("\n%s\n", str_get(&help));
  54         str_free(&help);
  55 }
  56
  57 static void strip(char *str)
  58 {
  59         char *p = str;
  60         int l;
  61
  62         while ((isspace(*p)))
  63                 p++;
  64         l = strlen(p);
  65         if (p != str)
  66                 memmove(str, p, l + 1);
  67         if (!l)
  68                 return;
  69         p = str + l - 1;
  70         while ((isspace(*p)))
  71                 *p-- = 0;
  72 }
  73
  74 /* Helper function to facilitate fgets() by Jean Sacren. */
  75 static void xfgets(char *str, int size, FILE *in)
  76 {
  77         if (!fgets(str, size, in))
  78                 fprintf(stderr, "\nError in reading or end of file.\n");
  79
  80         if (!tty_stdio)
  81                 printf("%s", str);
  82 }
  83
  84 static int conf_askvalue(struct symbol *sym, const char *def)
  85 {
  86         enum symbol_type type = sym_get_type(sym);
  87
  88         if (!sym_has_value(sym))
  89                 printf("(NEW) ");
  90
  91         line[0] = '\n';
  92         line[1] = 0;
  93
  94         if (!sym_is_changeable(sym)) {
  95                 printf("%s\n", def);
  96                 line[0] = '\n';
  97                 line[1] = 0;
  98                 return 0;
  99         }
 100
 101         switch (input_mode) {
 102         case oldconfig:
 103         case syncconfig:
 104                 if (sym_has_value(sym)) {
 105                         printf("%s\n", def);
 106                         return 0;
 107                 }
 108                 /* fall through */
 109         case oldaskconfig:
 110                 fflush(stdout);
 111                 xfgets(line, sizeof(line), stdin);
 112                 return 1;
 113         default:
 114                 break;
 115         }
 116
 117         switch (type) {
 118         case S_INT:
 119         case S_HEX:
 120         case S_STRING:
 121                 printf("%s\n", def);
 122                 return 1;
 123         default:
 124                 ;
 125         }
 126         printf("%s", line);
 127         return 1;
 128 }
 129
 130 static int conf_string(struct menu *menu)
 131 {
 132         struct symbol *sym = menu->sym;
 133         const char *def;
 134
 135         while (1) {
 136                 printf("%*s%s ", indent - 1, "", menu->prompt->text);
 137                 printf("(%s) ", sym->name);
 138                 def = sym_get_string_value(sym);
 139                 if (sym_get_string_value(sym))
 140                         printf("[%s] ", def);
 141                 if (!conf_askvalue(sym, def))
 142                         return 0;
 143                 switch (line[0]) {
 144                 case '\n':
 145                         break;
 146                 case '?':
 147                         /* print help */
 148                         if (line[1] == '\n') {
 149                                 print_help(menu);
 150                                 def = NULL;
 151                                 break;
 152                         }
 153                         /* fall through */
 154                 default:
 155                         line[strlen(line)-1] = 0;
 156                         def = line;
 157                 }
 158                 if (def && sym_set_string_value(sym, def))
 159                         return 0;
 160         }
 161 }
 162
 163 static int conf_sym(struct menu *menu)
 164 {
 165         struct symbol *sym = menu->sym;
 166         tristate oldval, newval;
 167
 168         while (1) {
 169                 printf("%*s%s ", indent - 1, "", menu->prompt->text);
 170                 if (sym->name)
 171                         printf("(%s) ", sym->name);
 172                 putchar('[');
 173                 oldval = sym_get_tristate_value(sym);
 174                 switch (oldval) {
 175                 case no:
 176                         putchar('N');
 177                         break;
 178                 case mod:
 179                         putchar('M');
 180                         break;
 181                 case yes:
 182                         putchar('Y');
 183                         break;
 184                 }
 185                 if (oldval != no && sym_tristate_within_range(sym, no))
 186                         printf("/n");
 187                 if (oldval != mod && sym_tristate_within_range(sym, mod))
 188                         printf("/m");
 189                 if (oldval != yes && sym_tristate_within_range(sym, yes))
 190                         printf("/y");
 191                 printf("/?] ");
 192                 if (!conf_askvalue(sym, sym_get_string_value(sym)))
 193                         return 0;
 194                 strip(line);
 195
 196                 switch (line[0]) {
 197                 case 'n':
 198                 case 'N':
 199                         newval = no;
 200                         if (!line[1] || !strcmp(&line[1], "o"))
 201                                 break;
 202                         continue;
 203                 case 'm':
 204                 case 'M':
 205                         newval = mod;
 206                         if (!line[1])
 207                                 break;
 208                         continue;
 209                 case 'y':
 210                 case 'Y':
 211                         newval = yes;
 212                         if (!line[1] || !strcmp(&line[1], "es"))
 213                                 break;
 214                         continue;
 215                 case 0:
 216                         newval = oldval;
 217                         break;
 218                 case '?':
 219                         goto help;
 220                 default:
 221                         continue;
 222                 }
 223                 if (sym_set_tristate_value(sym, newval))
 224                         return 0;
 225 help:
 226                 print_help(menu);
 227         }
 228 }
 229
 230 static int conf_choice(struct menu *menu)
 231 {
 232         struct symbol *sym, *def_sym;
 233         struct menu *child;
 234         bool is_new;
 235
 236         sym = menu->sym;
 237         is_new = !sym_has_value(sym);
 238         if (sym_is_changeable(sym)) {
 239                 conf_sym(menu);
 240                 sym_calc_value(sym);
 241                 switch (sym_get_tristate_value(sym)) {
 242                 case no:
 243                         return 1;
 244                 case mod:
 245                         return 0;
 246                 case yes:
 247                         break;
 248                 }
 249         } else {
 250                 switch (sym_get_tristate_value(sym)) {
 251                 case no:
 252                         return 1;
 253                 case mod:
 254                         printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
 255                         return 0;
 256                 case yes:
 257                         break;
 258                 }
 259         }
 260
 261         while (1) {
 262                 int cnt, def;
 263
 264                 printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
 265                 def_sym = sym_get_choice_value(sym);
 266                 cnt = def = 0;
 267                 line[0] = 0;
 268                 for (child = menu->list; child; child = child->next) {
 269                         if (!menu_is_visible(child))
 270                                 continue;
 271                         if (!child->sym) {
 272                                 printf("%*c %s\n", indent, '*', menu_get_prompt(child));
 273                                 continue;
 274                         }
 275                         cnt++;
 276                         if (child->sym == def_sym) {
 277                                 def = cnt;
 278                                 printf("%*c", indent, '>');
 279                         } else
 280                                 printf("%*c", indent, ' ');
 281                         printf(" %d. %s", cnt, menu_get_prompt(child));
 282                         if (child->sym->name)
 283                                 printf(" (%s)", child->sym->name);
 284                         if (!sym_has_value(child->sym))
 285                                 printf(" (NEW)");
 286                         printf("\n");
 287                 }
 288                 printf("%*schoice", indent - 1, "");
 289                 if (cnt == 1) {
 290                         printf("[1]: 1\n");
 291                         goto conf_childs;
 292                 }
 293                 printf("[1-%d?]: ", cnt);
 294                 switch (input_mode) {
 295                 case oldconfig:
 296                 case syncconfig:
 297                         if (!is_new) {
 298                                 cnt = def;
 299                                 printf("%d\n", cnt);
 300                                 break;
 301                         }
 302                         /* fall through */
 303                 case oldaskconfig:
 304                         fflush(stdout);
 305                         xfgets(line, sizeof(line), stdin);
 306                         strip(line);
 307                         if (line[0] == '?') {
 308                                 print_help(menu);
 309                                 continue;
 310                         }
 311                         if (!line[0])
 312                                 cnt = def;
 313                         else if (isdigit(line[0]))
 314                                 cnt = atoi(line);
 315                         else
 316                                 continue;
 317                         break;
 318                 default:
 319                         break;
 320                 }
 321
 322         conf_childs:
 323                 for (child = menu->list; child; child = child->next) {
 324                         if (!child->sym || !menu_is_visible(child))
 325                                 continue;
 326                         if (!--cnt)
 327                                 break;
 328                 }
 329                 if (!child)
 330                         continue;
 331                 if (line[0] && line[strlen(line) - 1] == '?') {
 332                         print_help(child);
 333                         continue;
 334                 }
 335                 sym_set_choice_value(sym, child->sym);
 336                 for (child = child->list; child; child = child->next) {
 337                         indent += 2;
 338                         conf(child);
 339                         indent -= 2;
 340                 }
 341                 return 1;
 342         }
 343 }
 344
 345 static void conf(struct menu *menu)
 346 {
 347         struct symbol *sym;
 348         struct property *prop;
 349         struct menu *child;
 350
 351         if (!menu_is_visible(menu))
 352                 return;
 353
 354         sym = menu->sym;
 355         prop = menu->prompt;
 356         if (prop) {
 357                 const char *prompt;
 358
 359                 switch (prop->type) {
 360                 case P_MENU:
 361                         /*
 362                          * Except in oldaskconfig mode, we show only menus that
 363                          * contain new symbols.
 364                          */
 365                         if (input_mode != oldaskconfig && rootEntry != menu) {
 366                                 check_conf(menu);
 367                                 return;
 368                         }
 369                         /* fall through */
 370                 case P_COMMENT:
 371                         prompt = menu_get_prompt(menu);
 372                         if (prompt)
 373                                 printf("%*c\n%*c %s\n%*c\n",
 374                                         indent, '*',
 375                                         indent, '*', prompt,
 376                                         indent, '*');
 377                 default:
 378                         ;
 379                 }
 380         }
 381
 382         if (!sym)
 383                 goto conf_childs;
 384
 385         if (sym_is_choice(sym)) {
 386                 conf_choice(menu);
 387                 if (sym->curr.tri != mod)
 388                         return;
 389                 goto conf_childs;
 390         }
 391
 392         switch (sym->type) {
 393         case S_INT:
 394         case S_HEX:
 395         case S_STRING:
 396                 conf_string(menu);
 397                 break;
 398         default:
 399                 conf_sym(menu);
 400                 break;
 401         }
 402
 403 conf_childs:
 404         if (sym)
 405                 indent += 2;
 406         for (child = menu->list; child; child = child->next)
 407                 conf(child);
 408         if (sym)
 409                 indent -= 2;
 410 }
 411
 412 static void check_conf(struct menu *menu)
 413 {
 414         struct symbol *sym;
 415         struct menu *child;
 416
 417         if (!menu_is_visible(menu))
 418                 return;
 419
 420         sym = menu->sym;
 421         if (sym && !sym_has_value(sym)) {
 422                 if (sym_is_changeable(sym) ||
 423                     (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)) {
 424                         if (input_mode == listnewconfig) {
 425                                 if (sym->name) {
 426                                         const char *str;
 427
 428                                         if (sym->type == S_STRING) {
 429                                                 str = sym_get_string_value(sym);
 430                                                 str = sym_escape_string_value(str);
 431                                                 printf("%s%s=%s\n", CONFIG_, sym->name, str);
 432                                                 free((void *)str);
 433                                         } else {
 434                                                 str = sym_get_string_value(sym);
 435                                                 printf("%s%s=%s\n", CONFIG_, sym->name, str);
 436                                         }
 437                                 }
 438                         } else if (input_mode == helpnewconfig) {
 439                                 printf("-----\n");
 440                                 print_help(menu);
 441                                 printf("-----\n");
 442
 443                         } else {
 444                                 if (!conf_cnt++)
 445                                         printf("*\n* Restart config...\n*\n");
 446                                 rootEntry = menu_get_parent_menu(menu);
 447                                 conf(rootEntry);
 448                         }
 449                 }
 450         }
 451
 452         for (child = menu->list; child; child = child->next)
 453                 check_conf(child);
 454 }
 455
 456 static struct option long_opts[] = {
 457         {"oldaskconfig",    no_argument,       NULL, oldaskconfig},
 458         {"oldconfig",       no_argument,       NULL, oldconfig},
 459         {"syncconfig",      no_argument,       NULL, syncconfig},
 460         {"defconfig",       required_argument, NULL, defconfig},
 461         {"savedefconfig",   required_argument, NULL, savedefconfig},
 462         {"allnoconfig",     no_argument,       NULL, allnoconfig},
 463         {"allyesconfig",    no_argument,       NULL, allyesconfig},
 464         {"allmodconfig",    no_argument,       NULL, allmodconfig},
 465         {"alldefconfig",    no_argument,       NULL, alldefconfig},
 466         {"randconfig",      no_argument,       NULL, randconfig},
 467         {"listnewconfig",   no_argument,       NULL, listnewconfig},
 468         {"helpnewconfig",   no_argument,       NULL, helpnewconfig},
 469         {"olddefconfig",    no_argument,       NULL, olddefconfig},
 470         {NULL, 0, NULL, 0}
 471 };
 472
 473 static void conf_usage(const char *progname)
 474 {
 475
 476         printf("Usage: %s [-s] [option] <kconfig-file>\n", progname);
 477         printf("[option] is _one_ of the following:\n");
 478         printf("  --listnewconfig         List new options\n");
 479         printf("  --helpnewconfig         List new options and help text\n");
 480         printf("  --oldaskconfig          Start a new configuration using a line-oriented program\n");
 481         printf("  --oldconfig             Update a configuration using a provided .config as base\n");
 482         printf("  --syncconfig            Similar to oldconfig but generates configuration in\n"
 483                "                          include/{generated/,config/}\n");
 484         printf("  --olddefconfig          Same as oldconfig but sets new symbols to their default value\n");
 485         printf("  --defconfig <file>      New config with default defined in <file>\n");
 486         printf("  --savedefconfig <file>  Save the minimal current configuration to <file>\n");
 487         printf("  --allnoconfig           New config where all options are answered with no\n");
 488         printf("  --allyesconfig          New config where all options are answered with yes\n");
 489         printf("  --allmodconfig          New config where all options are answered with mod\n");
 490         printf("  --alldefconfig          New config with all symbols set to default\n");
 491         printf("  --randconfig            New config with random answer to all options\n");
 492 }
 493
 494 int main(int ac, char **av)
 495 {
 496         const char *progname = av[0];
 497         int opt;
 498         const char *name, *defconfig_file = NULL /* gcc uninit */;
 499         int no_conf_write = 0;
 500
 501         tty_stdio = isatty(0) && isatty(1);
 502
 503         while ((opt = getopt_long(ac, av, "s", long_opts, NULL)) != -1) {
 504                 if (opt == 's') {
 505                         conf_set_message_callback(NULL);
 506                         continue;
 507                 }
 508                 input_mode = (enum input_mode)opt;
 509                 switch (opt) {
 510                 case syncconfig:
 511                         /*
 512                          * syncconfig is invoked during the build stage.
 513                          * Suppress distracting "configuration written to ..."
 514                          */
 515                         conf_set_message_callback(NULL);
 516                         sync_kconfig = 1;
 517                         break;
 518                 case defconfig:
 519                 case savedefconfig:
 520                         defconfig_file = optarg;
 521                         break;
 522                 case randconfig:
 523                 {
 524                         struct timeval now;
 525                         unsigned int seed;
 526                         char *seed_env;
 527
 528                         /*
 529                          * Use microseconds derived seed,
 530                          * compensate for systems where it may be zero
 531                          */
 532                         gettimeofday(&now, NULL);
 533                         seed = (unsigned int)((now.tv_sec + 1) * (now.tv_usec + 1));
 534
 535                         seed_env = getenv("KCONFIG_SEED");
 536                         if( seed_env && *seed_env ) {
 537                                 char *endp;
 538                                 int tmp = (int)strtol(seed_env, &endp, 0);
 539                                 if (*endp == '\0') {
 540                                         seed = tmp;
 541                                 }
 542                         }
 543                         fprintf( stderr, "KCONFIG_SEED=0x%X\n", seed );
 544                         srand(seed);
 545                         break;
 546                 }
 547                 case oldaskconfig:
 548                 case oldconfig:
 549                 case allnoconfig:
 550                 case allyesconfig:
 551                 case allmodconfig:
 552                 case alldefconfig:
 553                 case listnewconfig:
 554                 case helpnewconfig:
 555                 case olddefconfig:
 556                         break;
 557                 case '?':
 558                         conf_usage(progname);
 559                         exit(1);
 560                         break;
 561                 }
 562         }
 563         if (ac == optind) {
 564                 fprintf(stderr, "%s: Kconfig file missing\n", av[0]);
 565                 conf_usage(progname);
 566                 exit(1);
 567         }
 568         name = av[optind];
 569         conf_parse(name);
 570         //zconfdump(stdout);
 571
 572         switch (input_mode) {
 573         case defconfig:
 574                 if (conf_read(defconfig_file)) {
 575                         fprintf(stderr,
 576                                 "***\n"
 577                                   "*** Can't find default configuration \"%s\"!\n"
 578                                   "***\n",
 579                                 defconfig_file);
 580                         exit(1);
 581                 }
 582                 break;
 583         case savedefconfig:
 584         case syncconfig:
 585         case oldaskconfig:
 586         case oldconfig:
 587         case listnewconfig:
 588         case helpnewconfig:
 589         case olddefconfig:
 590                 conf_read(NULL);
 591                 break;
 592         case allnoconfig:
 593         case allyesconfig:
 594         case allmodconfig:
 595         case alldefconfig:
 596         case randconfig:
 597                 name = getenv("KCONFIG_ALLCONFIG");
 598                 if (!name)
 599                         break;
 600                 if ((strcmp(name, "") != 0) && (strcmp(name, "1") != 0)) {
 601                         if (conf_read_simple(name, S_DEF_USER)) {
 602                                 fprintf(stderr,
 603                                         "*** Can't read seed configuration \"%s\"!\n",
 604                                         name);
 605                                 exit(1);
 606                         }
 607                         break;
 608                 }
 609                 switch (input_mode) {
 610                 case allnoconfig:       name = "allno.config"; break;
 611                 case allyesconfig:      name = "allyes.config"; break;
 612                 case allmodconfig:      name = "allmod.config"; break;
 613                 case alldefconfig:      name = "alldef.config"; break;
 614                 case randconfig:        name = "allrandom.config"; break;
 615                 default: break;
 616                 }
 617                 if (conf_read_simple(name, S_DEF_USER) &&
 618                     conf_read_simple("all.config", S_DEF_USER)) {
 619                         fprintf(stderr,
 620                                 "*** KCONFIG_ALLCONFIG set, but no \"%s\" or \"all.config\" file found\n",
 621                                 name);
 622                         exit(1);
 623                 }
 624                 break;
 625         default:
 626                 break;
 627         }
 628
 629         if (sync_kconfig) {
 630                 name = getenv("KCONFIG_NOSILENTUPDATE");
 631                 if (name && *name) {
 632                         if (conf_get_changed()) {
 633                                 fprintf(stderr,
 634                                         "\n*** The configuration requires explicit update.\n\n");
 635                                 return 1;
 636                         }
 637                         no_conf_write = 1;
 638                 }
 639         }
 640
 641         switch (input_mode) {
 642         case allnoconfig:
 643                 conf_set_all_new_symbols(def_no);
 644                 break;
 645         case allyesconfig:
 646                 conf_set_all_new_symbols(def_yes);
 647                 break;
 648         case allmodconfig:
 649                 conf_set_all_new_symbols(def_mod);
 650                 break;
 651         case alldefconfig:
 652                 conf_set_all_new_symbols(def_default);
 653                 break;
 654         case randconfig:
 655                 /* Really nothing to do in this loop */
 656                 while (conf_set_all_new_symbols(def_random)) ;
 657                 break;
 658         case defconfig:
 659                 conf_set_all_new_symbols(def_default);
 660                 break;
 661         case savedefconfig:
 662                 break;
 663         case oldaskconfig:
 664                 rootEntry = &rootmenu;
 665                 conf(&rootmenu);
 666                 input_mode = oldconfig;
 667                 /* fall through */
 668         case oldconfig:
 669         case listnewconfig:
 670         case helpnewconfig:
 671         case syncconfig:
 672                 /* Update until a loop caused no more changes */
 673                 do {
 674                         conf_cnt = 0;
 675                         check_conf(&rootmenu);
 676                 } while (conf_cnt);
 677                 break;
 678         case olddefconfig:
 679         default:
 680                 break;
 681         }
 682
 683         if (input_mode == savedefconfig) {
 684                 if (conf_write_defconfig(defconfig_file)) {
 685                         fprintf(stderr, "n*** Error while saving defconfig to: %s\n\n",
 686                                 defconfig_file);
 687                         return 1;
 688                 }
 689         } else if (input_mode != listnewconfig && input_mode != helpnewconfig) {
 690                 if (!no_conf_write && conf_write(NULL)) {
 691                         fprintf(stderr, "\n*** Error during writing of the configuration.\n\n");
 692                         exit(1);
 693                 }
 694
 695                 /*
 696                  * Create auto.conf if it does not exist.
 697                  * This prevents GNU Make 4.1 or older from emitting
 698                  * "include/generated/auto.conf: No such file or directory"
 699                  * in the top-level Makefile
 700                  *
 701                  * syncconfig always creates or updates auto.conf because it is
 702                  * used during the build.
 703                  */
 704
 705                 /*
 706                  * In our cmake case, we always want to update the autogenerated
 707                  * files.
 708                  */
 709                 sync_kconfig = 1;
 710
 711                 if (conf_write_autoconf(sync_kconfig) && sync_kconfig) {
 712                         fprintf(stderr,
 713                                 "\n*** Error during sync of the configuration.\n\n");
 714                         return 1;
 715                 }
 716         }
 717         return 0;
 718 }