scripts/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         yes2modconfig,
  38         mod2yesconfig,
  39 };
  40 static enum input_mode input_mode = oldaskconfig;
  41
  42 static int indent = 1;
  43 static int tty_stdio;
  44 static int sync_kconfig;
  45 static int conf_cnt;
  46 static char line[PATH_MAX];
  47 static struct menu *rootEntry;
  48
  49 static void print_help(struct menu *menu)
  50 {
  51         struct gstr help = str_new();
  52
  53         menu_get_ext_help(menu, &help);
  54
  55         printf("\n%s\n", str_get(&help));
  56         str_free(&help);
  57 }
  58
  59 static void strip(char *str)
  60 {
  61         char *p = str;
  62         int l;
  63
  64         while ((isspace(*p)))
  65                 p++;
  66         l = strlen(p);
  67         if (p != str)
  68                 memmove(str, p, l + 1);
  69         if (!l)
  70                 return;
  71         p = str + l - 1;
  72         while ((isspace(*p)))
  73                 *p-- = 0;
  74 }
  75
  76 /* Helper function to facilitate fgets() by Jean Sacren. */
  77 static void xfgets(char *str, int size, FILE *in)
  78 {
  79         if (!fgets(str, size, in))
  80                 fprintf(stderr, "\nError in reading or end of file.\n");
  81
  82         if (!tty_stdio)
  83                 printf("%s", str);
  84 }
  85
  86 static int conf_askvalue(struct symbol *sym, const char *def)
  87 {
  88         enum symbol_type type = sym_get_type(sym);
  89
  90         if (!sym_has_value(sym))
  91                 printf("(NEW) ");
  92
  93         line[0] = '\n';
  94         line[1] = 0;
  95
  96         if (!sym_is_changeable(sym)) {
  97                 printf("%s\n", def);
  98                 line[0] = '\n';
  99                 line[1] = 0;
 100                 return 0;
 101         }
 102
 103         switch (input_mode) {
 104         case oldconfig:
 105         case syncconfig:
 106                 if (sym_has_value(sym)) {
 107                         printf("%s\n", def);
 108                         return 0;
 109                 }
 110                 /* fall through */
 111         case oldaskconfig:
 112                 fflush(stdout);
 113                 xfgets(line, sizeof(line), stdin);
 114                 return 1;
 115         default:
 116                 break;
 117         }
 118
 119         switch (type) {
 120         case S_INT:
 121         case S_HEX:
 122         case S_STRING:
 123                 printf("%s\n", def);
 124                 return 1;
 125         default:
 126                 ;
 127         }
 128         printf("%s", line);
 129         return 1;
 130 }
 131
 132 static int conf_string(struct menu *menu)
 133 {
 134         struct symbol *sym = menu->sym;
 135         const char *def;
 136
 137         while (1) {
 138                 printf("%*s%s ", indent - 1, "", menu->prompt->text);
 139                 printf("(%s) ", sym->name);
 140                 def = sym_get_string_value(sym);
 141                 if (sym_get_string_value(sym))
 142                         printf("[%s] ", def);
 143                 if (!conf_askvalue(sym, def))
 144                         return 0;
 145                 switch (line[0]) {
 146                 case '\n':
 147                         break;
 148                 case '?':
 149                         /* print help */
 150                         if (line[1] == '\n') {
 151                                 print_help(menu);
 152                                 def = NULL;
 153                                 break;
 154                         }
 155                         /* fall through */
 156                 default:
 157                         line[strlen(line)-1] = 0;
 158                         def = line;
 159                 }
 160                 if (def && sym_set_string_value(sym, def))
 161                         return 0;
 162         }
 163 }
 164
 165 static int conf_sym(struct menu *menu)
 166 {
 167         struct symbol *sym = menu->sym;
 168         tristate oldval, newval;
 169
 170         while (1) {
 171                 printf("%*s%s ", indent - 1, "", menu->prompt->text);
 172                 if (sym->name)
 173                         printf("(%s) ", sym->name);
 174                 putchar('[');
 175                 oldval = sym_get_tristate_value(sym);
 176                 switch (oldval) {
 177                 case no:
 178                         putchar('N');
 179                         break;
 180                 case mod:
 181                         putchar('M');
 182                         break;
 183                 case yes:
 184                         putchar('Y');
 185                         break;
 186                 }
 187                 if (oldval != no && sym_tristate_within_range(sym, no))
 188                         printf("/n");
 189                 if (oldval != mod && sym_tristate_within_range(sym, mod))
 190                         printf("/m");
 191                 if (oldval != yes && sym_tristate_within_range(sym, yes))
 192                         printf("/y");
 193                 printf("/?] ");
 194                 if (!conf_askvalue(sym, sym_get_string_value(sym)))
 195                         return 0;
 196                 strip(line);
 197
 198                 switch (line[0]) {
 199                 case 'n':
 200                 case 'N':
 201                         newval = no;
 202                         if (!line[1] || !strcmp(&line[1], "o"))
 203                                 break;
 204                         continue;
 205                 case 'm':
 206                 case 'M':
 207                         newval = mod;
 208                         if (!line[1])
 209                                 break;
 210                         continue;
 211                 case 'y':
 212                 case 'Y':
 213                         newval = yes;
 214                         if (!line[1] || !strcmp(&line[1], "es"))
 215                                 break;
 216                         continue;
 217                 case 0:
 218                         newval = oldval;
 219                         break;
 220                 case '?':
 221                         goto help;
 222                 default:
 223                         continue;
 224                 }
 225                 if (sym_set_tristate_value(sym, newval))
 226                         return 0;
 227 help:
 228                 print_help(menu);
 229         }
 230 }
 231
 232 static int conf_choice(struct menu *menu)
 233 {
 234         struct symbol *sym, *def_sym;
 235         struct menu *child;
 236         bool is_new;
 237
 238         sym = menu->sym;
 239         is_new = !sym_has_value(sym);
 240         if (sym_is_changeable(sym)) {
 241                 conf_sym(menu);
 242                 sym_calc_value(sym);
 243                 switch (sym_get_tristate_value(sym)) {
 244                 case no:
 245                         return 1;
 246                 case mod:
 247                         return 0;
 248                 case yes:
 249                         break;
 250                 }
 251         } else {
 252                 switch (sym_get_tristate_value(sym)) {
 253                 case no:
 254                         return 1;
 255                 case mod:
 256                         printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
 257                         return 0;
 258                 case yes:
 259                         break;
 260                 }
 261         }
 262
 263         while (1) {
 264                 int cnt, def;
 265
 266                 printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
 267                 def_sym = sym_get_choice_value(sym);
 268                 cnt = def = 0;
 269                 line[0] = 0;
 270                 for (child = menu->list; child; child = child->next) {
 271                         if (!menu_is_visible(child))
 272                                 continue;
 273                         if (!child->sym) {
 274                                 printf("%*c %s\n", indent, '*', menu_get_prompt(child));
 275                                 continue;
 276                         }
 277                         cnt++;
 278                         if (child->sym == def_sym) {
 279                                 def = cnt;
 280                                 printf("%*c", indent, '>');
 281                         } else
 282                                 printf("%*c", indent, ' ');
 283                         printf(" %d. %s", cnt, menu_get_prompt(child));
 284                         if (child->sym->name)
 285                                 printf(" (%s)", child->sym->name);
 286                         if (!sym_has_value(child->sym))
 287                                 printf(" (NEW)");
 288                         printf("\n");
 289                 }
 290                 printf("%*schoice", indent - 1, "");
 291                 if (cnt == 1) {
 292                         printf("[1]: 1\n");
 293                         goto conf_childs;
 294                 }
 295                 printf("[1-%d?]: ", cnt);
 296                 switch (input_mode) {
 297                 case oldconfig:
 298                 case syncconfig:
 299                         if (!is_new) {
 300                                 cnt = def;
 301                                 printf("%d\n", cnt);
 302                                 break;
 303                         }
 304                         /* fall through */
 305                 case oldaskconfig:
 306                         fflush(stdout);
 307                         xfgets(line, sizeof(line), stdin);
 308                         strip(line);
 309                         if (line[0] == '?') {
 310                                 print_help(menu);
 311                                 continue;
 312                         }
 313                         if (!line[0])
 314                                 cnt = def;
 315                         else if (isdigit(line[0]))
 316                                 cnt = atoi(line);
 317                         else
 318                                 continue;
 319                         break;
 320                 default:
 321                         break;
 322                 }
 323
 324         conf_childs:
 325                 for (child = menu->list; child; child = child->next) {
 326                         if (!child->sym || !menu_is_visible(child))
 327                                 continue;
 328                         if (!--cnt)
 329                                 break;
 330                 }
 331                 if (!child)
 332                         continue;
 333                 if (line[0] && line[strlen(line) - 1] == '?') {
 334                         print_help(child);
 335                         continue;
 336                 }
 337                 sym_set_choice_value(sym, child->sym);
 338                 for (child = child->list; child; child = child->next) {
 339                         indent += 2;
 340                         conf(child);
 341                         indent -= 2;
 342                 }
 343                 return 1;
 344         }
 345 }
 346
 347 static void conf(struct menu *menu)
 348 {
 349         struct symbol *sym;
 350         struct property *prop;
 351         struct menu *child;
 352
 353         if (!menu_is_visible(menu))
 354                 return;
 355
 356         sym = menu->sym;
 357         prop = menu->prompt;
 358         if (prop) {
 359                 const char *prompt;
 360
 361                 switch (prop->type) {
 362                 case P_MENU:
 363                         /*
 364                          * Except in oldaskconfig mode, we show only menus that
 365                          * contain new symbols.
 366                          */
 367                         if (input_mode != oldaskconfig && rootEntry != menu) {
 368                                 check_conf(menu);
 369                                 return;
 370                         }
 371                         /* fall through */
 372                 case P_COMMENT:
 373                         prompt = menu_get_prompt(menu);
 374                         if (prompt)
 375                                 printf("%*c\n%*c %s\n%*c\n",
 376                                         indent, '*',
 377                                         indent, '*', prompt,
 378                                         indent, '*');
 379                 default:
 380                         ;
 381                 }
 382         }
 383
 384         if (!sym)
 385                 goto conf_childs;
 386
 387         if (sym_is_choice(sym)) {
 388                 conf_choice(menu);
 389                 if (sym->curr.tri != mod)
 390                         return;
 391                 goto conf_childs;
 392         }
 393
 394         switch (sym->type) {
 395         case S_INT:
 396         case S_HEX:
 397         case S_STRING:
 398                 conf_string(menu);
 399                 break;
 400         default:
 401                 conf_sym(menu);
 402                 break;
 403         }
 404
 405 conf_childs:
 406         if (sym)
 407                 indent += 2;
 408         for (child = menu->list; child; child = child->next)
 409                 conf(child);
 410         if (sym)
 411                 indent -= 2;
 412 }
 413
 414 static void check_conf(struct menu *menu)
 415 {
 416         struct symbol *sym;
 417         struct menu *child;
 418
 419         if (!menu_is_visible(menu))
 420                 return;
 421
 422         sym = menu->sym;
 423         if (sym && !sym_has_value(sym)) {
 424                 if (sym_is_changeable(sym) ||
 425                     (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)) {
 426                         if (input_mode == listnewconfig) {
 427                                 if (sym->name) {
 428                                         const char *str;
 429
 430                                         if (sym->type == S_STRING) {
 431                                                 str = sym_get_string_value(sym);
 432                                                 str = sym_escape_string_value(str);
 433                                                 printf("%s%s=%s\n", CONFIG_, sym->name, str);
 434                                                 free((void *)str);
 435                                         } else {
 436                                                 str = sym_get_string_value(sym);
 437                                                 printf("%s%s=%s\n", CONFIG_, sym->name, str);
 438                                         }
 439                                 }
 440                         } else if (input_mode == helpnewconfig) {
 441                                 printf("-----\n");
 442                                 print_help(menu);
 443                                 printf("-----\n");
 444
 445                         } else {
 446                                 if (!conf_cnt++)
 447                                         printf("*\n* Restart config...\n*\n");
 448                                 rootEntry = menu_get_parent_menu(menu);
 449                                 conf(rootEntry);
 450                         }
 451                 }
 452         }
 453
 454         for (child = menu->list; child; child = child->next)
 455                 check_conf(child);
 456 }
 457
 458 static struct option long_opts[] = {
 459         {"oldaskconfig",    no_argument,       NULL, oldaskconfig},
 460         {"oldconfig",       no_argument,       NULL, oldconfig},
 461         {"syncconfig",      no_argument,       NULL, syncconfig},
 462         {"defconfig",       required_argument, NULL, defconfig},
 463         {"savedefconfig",   required_argument, NULL, savedefconfig},
 464         {"allnoconfig",     no_argument,       NULL, allnoconfig},
 465         {"allyesconfig",    no_argument,       NULL, allyesconfig},
 466         {"allmodconfig",    no_argument,       NULL, allmodconfig},
 467         {"alldefconfig",    no_argument,       NULL, alldefconfig},
 468         {"randconfig",      no_argument,       NULL, randconfig},
 469         {"listnewconfig",   no_argument,       NULL, listnewconfig},
 470         {"helpnewconfig",   no_argument,       NULL, helpnewconfig},
 471         {"olddefconfig",    no_argument,       NULL, olddefconfig},
 472         {"yes2modconfig",   no_argument,       NULL, yes2modconfig},
 473         {"mod2yesconfig",   no_argument,       NULL, mod2yesconfig},
 474         {NULL, 0, NULL, 0}
 475 };
 476
 477 static void conf_usage(const char *progname)
 478 {
 479
 480         printf("Usage: %s [-s] [option] <kconfig-file>\n", progname);
 481         printf("[option] is _one_ of the following:\n");
 482         printf("  --listnewconfig         List new options\n");
 483         printf("  --helpnewconfig         List new options and help text\n");
 484         printf("  --oldaskconfig          Start a new configuration using a line-oriented program\n");
 485         printf("  --oldconfig             Update a configuration using a provided .config as base\n");
 486         printf("  --syncconfig            Similar to oldconfig but generates configuration in\n"
 487                "                          include/{generated/,config/}\n");
 488         printf("  --olddefconfig          Same as oldconfig but sets new symbols to their default value\n");
 489         printf("  --defconfig <file>      New config with default defined in <file>\n");
 490         printf("  --savedefconfig <file>  Save the minimal current configuration to <file>\n");
 491         printf("  --allnoconfig           New config where all options are answered with no\n");
 492         printf("  --allyesconfig          New config where all options are answered with yes\n");
 493         printf("  --allmodconfig          New config where all options are answered with mod\n");
 494         printf("  --alldefconfig          New config with all symbols set to default\n");
 495         printf("  --randconfig            New config with random answer to all options\n");
 496         printf("  --yes2modconfig         Change answers from yes to mod if possible\n");
 497         printf("  --mod2yesconfig         Change answers from mod to yes if possible\n");
 498 }
 499
 500 int main(int ac, char **av)
 501 {
 502         const char *progname = av[0];
 503         int opt;
 504         const char *name, *defconfig_file = NULL /* gcc uninit */;
 505         const char *input_file = NULL, *output_file = NULL;
 506         int no_conf_write = 0;
 507
 508         tty_stdio = isatty(0) && isatty(1);
 509
 510         while ((opt = getopt_long(ac, av, "r:w:s", long_opts, NULL)) != -1) {
 511                 if (opt == 's') {
 512                         conf_set_message_callback(NULL);
 513                         continue;
 514                 }
 515                 switch (opt) {
 516                 case syncconfig:
 517                         /*
 518                          * syncconfig is invoked during the build stage.
 519                          * Suppress distracting "configuration written to ..."
 520                          */
 521                         conf_set_message_callback(NULL);
 522                         sync_kconfig = 1;
 523                         break;
 524                 case defconfig:
 525                 case savedefconfig:
 526                         defconfig_file = optarg;
 527                         break;
 528                 case randconfig:
 529                 {
 530                         struct timeval now;
 531                         unsigned int seed;
 532                         char *seed_env;
 533
 534                         /*
 535                          * Use microseconds derived seed,
 536                          * compensate for systems where it may be zero
 537                          */
 538                         gettimeofday(&now, NULL);
 539                         seed = (unsigned int)((now.tv_sec + 1) * (now.tv_usec + 1));
 540
 541                         seed_env = getenv("KCONFIG_SEED");
 542                         if( seed_env && *seed_env ) {
 543                                 char *endp;
 544                                 int tmp = (int)strtol(seed_env, &endp, 0);
 545                                 if (*endp == '\0') {
 546                                         seed = tmp;
 547                                 }
 548                         }
 549                         fprintf( stderr, "KCONFIG_SEED=0x%X\n", seed );
 550                         srand(seed);
 551                         break;
 552                 }
 553                 case oldaskconfig:
 554                 case oldconfig:
 555                 case allnoconfig:
 556                 case allyesconfig:
 557                 case allmodconfig:
 558                 case alldefconfig:
 559                 case listnewconfig:
 560                 case helpnewconfig:
 561                 case olddefconfig:
 562                 case yes2modconfig:
 563                 case mod2yesconfig:
 564                         break;
 565                 case 'r':
 566                         input_file = optarg;
 567                         continue;
 568                 case 'w':
 569                         output_file = optarg;
 570                         continue;
 571                 case '?':
 572                         conf_usage(progname);
 573                         exit(1);
 574                         break;
 575                 }
 576                 input_mode = (enum input_mode)opt;
 577         }
 578         if (ac == optind) {
 579                 fprintf(stderr, "%s: Kconfig file missing\n", av[0]);
 580                 conf_usage(progname);
 581                 exit(1);
 582         }
 583         name = av[optind];
 584         conf_parse(name);
 585         //zconfdump(stdout);
 586
 587         switch (input_mode) {
 588         case defconfig:
 589                 if (conf_read(defconfig_file)) {
 590                         fprintf(stderr,
 591                                 "***\n"
 592                                   "*** Can't find default configuration \"%s\"!\n"
 593                                   "***\n",
 594                                 defconfig_file);
 595                         exit(1);
 596                 }
 597                 break;
 598         case savedefconfig:
 599         case syncconfig:
 600         case oldaskconfig:
 601         case oldconfig:
 602         case listnewconfig:
 603         case helpnewconfig:
 604         case olddefconfig:
 605         case yes2modconfig:
 606         case mod2yesconfig:
 607         case allnoconfig:
 608         case allyesconfig:
 609         case allmodconfig:
 610         case alldefconfig:
 611         case randconfig:
 612                 conf_read(input_file);
 613                 break;
 614         default:
 615                 break;
 616         }
 617
 618         if (sync_kconfig) {
 619                 name = getenv("KCONFIG_NOSILENTUPDATE");
 620                 if (name && *name) {
 621                         if (conf_get_changed()) {
 622                                 fprintf(stderr,
 623                                         "\n*** The configuration requires explicit update.\n\n");
 624                                 return 1;
 625                         }
 626                         no_conf_write = 1;
 627                 }
 628         }
 629
 630         switch (input_mode) {
 631         case allnoconfig:
 632                 conf_set_all_new_symbols(def_no);
 633                 break;
 634         case allyesconfig:
 635                 conf_set_all_new_symbols(def_yes);
 636                 break;
 637         case allmodconfig:
 638                 conf_set_all_new_symbols(def_mod);
 639                 break;
 640         case alldefconfig:
 641                 conf_set_all_new_symbols(def_default);
 642                 break;
 643         case randconfig:
 644                 /* Really nothing to do in this loop */
 645                 while (conf_set_all_new_symbols(def_random)) ;
 646                 break;
 647         case defconfig:
 648                 conf_set_all_new_symbols(def_default);
 649                 break;
 650         case savedefconfig:
 651                 break;
 652         case yes2modconfig:
 653                 conf_rewrite_mod_or_yes(def_y2m);
 654                 break;
 655         case mod2yesconfig:
 656                 conf_rewrite_mod_or_yes(def_m2y);
 657                 break;
 658         case oldaskconfig:
 659                 rootEntry = &rootmenu;
 660                 conf(&rootmenu);
 661                 input_mode = oldconfig;
 662                 /* fall through */
 663         case oldconfig:
 664         case listnewconfig:
 665         case helpnewconfig:
 666         case syncconfig:
 667                 /* Update until a loop caused no more changes */
 668                 do {
 669                         conf_cnt = 0;
 670                         check_conf(&rootmenu);
 671                 } while (conf_cnt);
 672                 break;
 673         case olddefconfig:
 674         default:
 675                 break;
 676         }
 677
 678         if (input_mode == savedefconfig) {
 679                 if (conf_write_defconfig(defconfig_file)) {
 680                         fprintf(stderr, "n*** Error while saving defconfig to: %s\n\n",
 681                                 defconfig_file);
 682                         return 1;
 683                 }
 684         } else if (input_mode != listnewconfig && input_mode != helpnewconfig) {
 685                 if ((output_file || !no_conf_write) &&
 686                     conf_write(output_file)) {
 687                         fprintf(stderr, "\n*** Error during writing of the configuration.\n\n");
 688                         exit(1);
 689                 }
 690
 691                 /*
 692                  * Create auto.conf if it does not exist.
 693                  * This prevents GNU Make 4.1 or older from emitting
 694                  * "include/config/auto.conf: No such file or directory"
 695                  * in the top-level Makefile
 696                  *
 697                  * syncconfig always creates or updates auto.conf because it is
 698                  * used during the build.
 699                  */
 700                 if (conf_write_autoconf(sync_kconfig) && sync_kconfig) {
 701                         fprintf(stderr,
 702                                 "\n*** Error during sync of the configuration.\n\n");
 703                         return 1;
 704                 }
 705         }
 706         return 0;
 707 }