scripts/config/conf.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   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         fatalrecursive,
  40 };
  41 static enum input_mode input_mode = oldaskconfig;
  42
  43 static int indent = 1;
  44 static int tty_stdio;
  45 static int sync_kconfig;
  46 static int conf_cnt;
  47 static char line[PATH_MAX];
  48 static struct menu *rootEntry;
  49
  50 static void print_help(struct menu *menu)
  51 {
  52         struct gstr help = str_new();
  53
  54         menu_get_ext_help(menu, &help);
  55
  56         printf("\n%s\n", str_get(&help));
  57         str_free(&help);
  58 }
  59
  60 static void strip(char *str)
  61 {
  62         char *p = str;
  63         int l;
  64
  65         while ((isspace(*p)))
  66                 p++;
  67         l = strlen(p);
  68         if (p != str)
  69                 memmove(str, p, l + 1);
  70         if (!l)
  71                 return;
  72         p = str + l - 1;
  73         while ((isspace(*p)))
  74                 *p-- = 0;
  75 }
  76
  77 /* Helper function to facilitate fgets() by Jean Sacren. */
  78 static void xfgets(char *str, int size, FILE *in)
  79 {
  80         if (!fgets(str, size, in))
  81                 fprintf(stderr, "\nError in reading or end of file.\n");
  82
  83         if (!tty_stdio)
  84                 printf("%s", str);
  85 }
  86
  87 static int conf_askvalue(struct symbol *sym, const char *def)
  88 {
  89         enum symbol_type type = sym_get_type(sym);
  90
  91         if (!sym_has_value(sym))
  92                 printf("(NEW) ");
  93
  94         line[0] = '\n';
  95         line[1] = 0;
  96
  97         if (!sym_is_changeable(sym)) {
  98                 printf("%s\n", def);
  99                 line[0] = '\n';
 100                 line[1] = 0;
 101                 return 0;
 102         }
 103
 104         switch (input_mode) {
 105         case oldconfig:
 106         case syncconfig:
 107                 if (sym_has_value(sym)) {
 108                         printf("%s\n", def);
 109                         return 0;
 110                 }
 111                 /* fall through */
 112         case oldaskconfig:
 113                 fflush(stdout);
 114                 xfgets(line, sizeof(line), stdin);
 115                 return 1;
 116         default:
 117                 break;
 118         }
 119
 120         switch (type) {
 121         case S_INT:
 122         case S_HEX:
 123         case S_STRING:
 124                 printf("%s\n", def);
 125                 return 1;
 126         default:
 127                 ;
 128         }
 129         printf("%s", line);
 130         return 1;
 131 }
 132
 133 static int conf_string(struct menu *menu)
 134 {
 135         struct symbol *sym = menu->sym;
 136         const char *def;
 137
 138         while (1) {
 139                 printf("%*s%s ", indent - 1, "", menu->prompt->text);
 140                 printf("(%s) ", sym->name);
 141                 def = sym_get_string_value(sym);
 142                 if (sym_get_string_value(sym))
 143                         printf("[%s] ", def);
 144                 if (!conf_askvalue(sym, def))
 145                         return 0;
 146                 switch (line[0]) {
 147                 case '\n':
 148                         break;
 149                 case '?':
 150                         /* print help */
 151                         if (line[1] == '\n') {
 152                                 print_help(menu);
 153                                 def = NULL;
 154                                 break;
 155                         }
 156                         /* fall through */
 157                 default:
 158                         line[strlen(line)-1] = 0;
 159                         def = line;
 160                 }
 161                 if (def && sym_set_string_value(sym, def))
 162                         return 0;
 163         }
 164 }
 165
 166 static int conf_sym(struct menu *menu)
 167 {
 168         struct symbol *sym = menu->sym;
 169         tristate oldval, newval;
 170
 171         while (1) {
 172                 printf("%*s%s ", indent - 1, "", menu->prompt->text);
 173                 if (sym->name)
 174                         printf("(%s) ", sym->name);
 175                 putchar('[');
 176                 oldval = sym_get_tristate_value(sym);
 177                 switch (oldval) {
 178                 case no:
 179                         putchar('N');
 180                         break;
 181                 case mod:
 182                         putchar('M');
 183                         break;
 184                 case yes:
 185                         putchar('Y');
 186                         break;
 187                 }
 188                 if (oldval != no && sym_tristate_within_range(sym, no))
 189                         printf("/n");
 190                 if (oldval != mod && sym_tristate_within_range(sym, mod))
 191                         printf("/m");
 192                 if (oldval != yes && sym_tristate_within_range(sym, yes))
 193                         printf("/y");
 194                 printf("/?] ");
 195                 if (!conf_askvalue(sym, sym_get_string_value(sym)))
 196                         return 0;
 197                 strip(line);
 198
 199                 switch (line[0]) {
 200                 case 'n':
 201                 case 'N':
 202                         newval = no;
 203                         if (!line[1] || !strcmp(&line[1], "o"))
 204                                 break;
 205                         continue;
 206                 case 'm':
 207                 case 'M':
 208                         newval = mod;
 209                         if (!line[1])
 210                                 break;
 211                         continue;
 212                 case 'y':
 213                 case 'Y':
 214                         newval = yes;
 215                         if (!line[1] || !strcmp(&line[1], "es"))
 216                                 break;
 217                         continue;
 218                 case 0:
 219                         newval = oldval;
 220                         break;
 221                 case '?':
 222                         goto help;
 223                 default:
 224                         continue;
 225                 }
 226                 if (sym_set_tristate_value(sym, newval))
 227                         return 0;
 228 help:
 229                 print_help(menu);
 230         }
 231 }
 232
 233 static int conf_choice(struct menu *menu)
 234 {
 235         struct symbol *sym, *def_sym;
 236         struct menu *child;
 237         bool is_new;
 238
 239         sym = menu->sym;
 240         is_new = !sym_has_value(sym);
 241         if (sym_is_changeable(sym)) {
 242                 conf_sym(menu);
 243                 sym_calc_value(sym);
 244                 switch (sym_get_tristate_value(sym)) {
 245                 case no:
 246                         return 1;
 247                 case mod:
 248                         return 0;
 249                 case yes:
 250                         break;
 251                 }
 252         } else {
 253                 switch (sym_get_tristate_value(sym)) {
 254                 case no:
 255                         return 1;
 256                 case mod:
 257                         printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
 258                         return 0;
 259                 case yes:
 260                         break;
 261                 }
 262         }
 263
 264         while (1) {
 265                 int cnt, def;
 266
 267                 printf("%*s%s\n", indent - 1, "", menu_get_prompt(menu));
 268                 def_sym = sym_get_choice_value(sym);
 269                 cnt = def = 0;
 270                 line[0] = 0;
 271                 for (child = menu->list; child; child = child->next) {
 272                         if (!menu_is_visible(child))
 273                                 continue;
 274                         if (!child->sym) {
 275                                 printf("%*c %s\n", indent, '*', menu_get_prompt(child));
 276                                 continue;
 277                         }
 278                         cnt++;
 279                         if (child->sym == def_sym) {
 280                                 def = cnt;
 281                                 printf("%*c", indent, '>');
 282                         } else
 283                                 printf("%*c", indent, ' ');
 284                         printf(" %d. %s", cnt, menu_get_prompt(child));
 285                         if (child->sym->name)
 286                                 printf(" (%s)", child->sym->name);
 287                         if (!sym_has_value(child->sym))
 288                                 printf(" (NEW)");
 289                         printf("\n");
 290                 }
 291                 printf("%*schoice", indent - 1, "");
 292                 if (cnt == 1) {
 293                         printf("[1]: 1\n");
 294                         goto conf_childs;
 295                 }
 296                 printf("[1-%d?]: ", cnt);
 297                 switch (input_mode) {
 298                 case oldconfig:
 299                 case syncconfig:
 300                         if (!is_new) {
 301                                 cnt = def;
 302                                 printf("%d\n", cnt);
 303                                 break;
 304                         }
 305                         /* fall through */
 306                 case oldaskconfig:
 307                         fflush(stdout);
 308                         xfgets(line, sizeof(line), stdin);
 309                         strip(line);
 310                         if (line[0] == '?') {
 311                                 print_help(menu);
 312                                 continue;
 313                         }
 314                         if (!line[0])
 315                                 cnt = def;
 316                         else if (isdigit(line[0]))
 317                                 cnt = atoi(line);
 318                         else
 319                                 continue;
 320                         break;
 321                 default:
 322                         break;
 323                 }
 324
 325         conf_childs:
 326                 for (child = menu->list; child; child = child->next) {
 327                         if (!child->sym || !menu_is_visible(child))
 328                                 continue;
 329                         if (!--cnt)
 330                                 break;
 331                 }
 332                 if (!child)
 333                         continue;
 334                 if (line[0] && line[strlen(line) - 1] == '?') {
 335                         print_help(child);
 336                         continue;
 337                 }
 338                 sym_set_choice_value(sym, child->sym);
 339                 for (child = child->list; child; child = child->next) {
 340                         indent += 2;
 341                         conf(child);
 342                         indent -= 2;
 343                 }
 344                 return 1;
 345         }
 346 }
 347
 348 static void conf(struct menu *menu)
 349 {
 350         struct symbol *sym;
 351         struct property *prop;
 352         struct menu *child;
 353
 354         if (!menu_is_visible(menu))
 355                 return;
 356
 357         sym = menu->sym;
 358         prop = menu->prompt;
 359         if (prop) {
 360                 const char *prompt;
 361
 362                 switch (prop->type) {
 363                 case P_MENU:
 364                         /*
 365                          * Except in oldaskconfig mode, we show only menus that
 366                          * contain new symbols.
 367                          */
 368                         if (input_mode != oldaskconfig && rootEntry != menu) {
 369                                 check_conf(menu);
 370                                 return;
 371                         }
 372                         /* fall through */
 373                 case P_COMMENT:
 374                         prompt = menu_get_prompt(menu);
 375                         if (prompt)
 376                                 printf("%*c\n%*c %s\n%*c\n",
 377                                         indent, '*',
 378                                         indent, '*', prompt,
 379                                         indent, '*');
 380                 default:
 381                         ;
 382                 }
 383         }
 384
 385         if (!sym)
 386                 goto conf_childs;
 387
 388         if (sym_is_choice(sym)) {
 389                 conf_choice(menu);
 390                 if (sym->curr.tri != mod)
 391                         return;
 392                 goto conf_childs;
 393         }
 394
 395         switch (sym->type) {
 396         case S_INT:
 397         case S_HEX:
 398         case S_STRING:
 399                 conf_string(menu);
 400                 break;
 401         default:
 402                 conf_sym(menu);
 403                 break;
 404         }
 405
 406 conf_childs:
 407         if (sym)
 408                 indent += 2;
 409         for (child = menu->list; child; child = child->next)
 410                 conf(child);
 411         if (sym)
 412                 indent -= 2;
 413 }
 414
 415 static void check_conf(struct menu *menu)
 416 {
 417         struct symbol *sym;
 418         struct menu *child;
 419
 420         if (!menu_is_visible(menu))
 421                 return;
 422
 423         sym = menu->sym;
 424         if (sym && !sym_has_value(sym)) {
 425                 if (sym_is_changeable(sym) ||
 426                     (sym_is_choice(sym) && sym_get_tristate_value(sym) == yes)) {
 427                         if (input_mode == listnewconfig) {
 428                                 if (sym->name) {
 429                                         const char *str;
 430
 431                                         if (sym->type == S_STRING) {
 432                                                 str = sym_get_string_value(sym);
 433                                                 str = sym_escape_string_value(str);
 434                                                 printf("%s%s=%s\n", CONFIG_, sym->name, str);
 435                                                 free((void *)str);
 436                                         } else {
 437                                                 str = sym_get_string_value(sym);
 438                                                 printf("%s%s=%s\n", CONFIG_, sym->name, str);
 439                                         }
 440                                 }
 441                         } else if (input_mode == helpnewconfig) {
 442                                 printf("-----\n");
 443                                 print_help(menu);
 444                                 printf("-----\n");
 445
 446                         } else {
 447                                 if (!conf_cnt++)
 448                                         printf("*\n* Restart config...\n*\n");
 449                                 rootEntry = menu_get_parent_menu(menu);
 450                                 conf(rootEntry);
 451                         }
 452                 }
 453         }
 454
 455         for (child = menu->list; child; child = child->next)
 456                 check_conf(child);
 457 }
 458
 459 static struct option long_opts[] = {
 460         {"oldaskconfig",    no_argument,       NULL, oldaskconfig},
 461         {"oldconfig",       no_argument,       NULL, oldconfig},
 462         {"syncconfig",      no_argument,       NULL, syncconfig},
 463         {"defconfig",       required_argument, NULL, defconfig},
 464         {"savedefconfig",   required_argument, NULL, savedefconfig},
 465         {"allnoconfig",     no_argument,       NULL, allnoconfig},
 466         {"allyesconfig",    no_argument,       NULL, allyesconfig},
 467         {"allmodconfig",    no_argument,       NULL, allmodconfig},
 468         {"alldefconfig",    no_argument,       NULL, alldefconfig},
 469         {"randconfig",      no_argument,       NULL, randconfig},
 470         {"listnewconfig",   no_argument,       NULL, listnewconfig},
 471         {"helpnewconfig",   no_argument,       NULL, helpnewconfig},
 472         {"olddefconfig",    no_argument,       NULL, olddefconfig},
 473         {"yes2modconfig",   no_argument,       NULL, yes2modconfig},
 474         {"mod2yesconfig",   no_argument,       NULL, mod2yesconfig},
 475         {"fatalrecursive",  no_argument,       NULL, fatalrecursive},
 476         {NULL, 0, NULL, 0}
 477 };
 478
 479 static void conf_usage(const char *progname)
 480 {
 481
 482         printf("Usage: %s [-s] [--fatalrecursive] [option] <kconfig-file>\n", progname);
 483         printf("[option] is _one_ of the following:\n");
 484         printf("  --listnewconfig         List new options\n");
 485         printf("  --helpnewconfig         List new options and help text\n");
 486         printf("  --oldaskconfig          Start a new configuration using a line-oriented program\n");
 487         printf("  --oldconfig             Update a configuration using a provided .config as base\n");
 488         printf("  --syncconfig            Similar to oldconfig but generates configuration in\n"
 489                "                          include/{generated/,config/}\n");
 490         printf("  --olddefconfig          Same as oldconfig but sets new symbols to their default value\n");
 491         printf("  --defconfig <file>      New config with default defined in <file>\n");
 492         printf("  --savedefconfig <file>  Save the minimal current configuration to <file>\n");
 493         printf("  --allnoconfig           New config where all options are answered with no\n");
 494         printf("  --allyesconfig          New config where all options are answered with yes\n");
 495         printf("  --allmodconfig          New config where all options are answered with mod\n");
 496         printf("  --alldefconfig          New config with all symbols set to default\n");
 497         printf("  --randconfig            New config with random answer to all options\n");
 498         printf("  --yes2modconfig         Change answers from yes to mod if possible\n");
 499         printf("  --mod2yesconfig         Change answers from mod to yes if possible\n");
 500 }
 501
 502 int main(int ac, char **av)
 503 {
 504         const char *progname = av[0];
 505         int opt;
 506         const char *name, *defconfig_file = NULL /* gcc uninit */;
 507         const char *input_file = NULL, *output_file = NULL;
 508         int no_conf_write = 0;
 509
 510         tty_stdio = isatty(0) && isatty(1);
 511
 512         while ((opt = getopt_long(ac, av, "r:w:s", long_opts, NULL)) != -1) {
 513                 if (opt == 's') {
 514                         conf_set_message_callback(NULL);
 515                         continue;
 516                 }
 517                 switch (opt) {
 518                 case syncconfig:
 519                         /*
 520                          * syncconfig is invoked during the build stage.
 521                          * Suppress distracting "configuration written to ..."
 522                          */
 523                         conf_set_message_callback(NULL);
 524                         sync_kconfig = 1;
 525                         break;
 526                 case defconfig:
 527                 case savedefconfig:
 528                         defconfig_file = optarg;
 529                         break;
 530                 case randconfig:
 531                 {
 532                         struct timeval now;
 533                         unsigned int seed;
 534                         char *seed_env;
 535
 536                         /*
 537                          * Use microseconds derived seed,
 538                          * compensate for systems where it may be zero
 539                          */
 540                         gettimeofday(&now, NULL);
 541                         seed = (unsigned int)((now.tv_sec + 1) * (now.tv_usec + 1));
 542
 543                         seed_env = getenv("KCONFIG_SEED");
 544                         if( seed_env && *seed_env ) {
 545                                 char *endp;
 546                                 int tmp = (int)strtol(seed_env, &endp, 0);
 547                                 if (*endp == '\0') {
 548                                         seed = tmp;
 549                                 }
 550                         }
 551                         fprintf( stderr, "KCONFIG_SEED=0x%X\n", seed );
 552                         srand(seed);
 553                         break;
 554                 }
 555                 case oldaskconfig:
 556                 case oldconfig:
 557                 case allnoconfig:
 558                 case allyesconfig:
 559                 case allmodconfig:
 560                 case alldefconfig:
 561                 case listnewconfig:
 562                 case helpnewconfig:
 563                 case olddefconfig:
 564                 case yes2modconfig:
 565                 case mod2yesconfig:
 566                         break;
 567                 case fatalrecursive:
 568                         recursive_is_error = 1;
 569                         continue;
 570                 case 'r':
 571                         input_file = optarg;
 572                         continue;
 573                 case 'w':
 574                         output_file = optarg;
 575                         continue;
 576                 case '?':
 577                         conf_usage(progname);
 578                         exit(1);
 579                         break;
 580                 }
 581                 input_mode = (enum input_mode)opt;
 582         }
 583         if (ac == optind) {
 584                 fprintf(stderr, "%s: Kconfig file missing\n", av[0]);
 585                 conf_usage(progname);
 586                 exit(1);
 587         }
 588         name = av[optind];
 589         conf_parse(name);
 590         //zconfdump(stdout);
 591
 592         switch (input_mode) {
 593         case defconfig:
 594                 if (conf_read(defconfig_file)) {
 595                         fprintf(stderr,
 596                                 "***\n"
 597                                   "*** Can't find default configuration \"%s\"!\n"
 598                                   "***\n",
 599                                 defconfig_file);
 600                         exit(1);
 601                 }
 602                 break;
 603         case savedefconfig:
 604         case syncconfig:
 605         case oldaskconfig:
 606         case oldconfig:
 607         case listnewconfig:
 608         case helpnewconfig:
 609         case olddefconfig:
 610         case yes2modconfig:
 611         case mod2yesconfig:
 612         case allnoconfig:
 613         case allyesconfig:
 614         case allmodconfig:
 615         case alldefconfig:
 616         case randconfig:
 617                 conf_read(input_file);
 618                 break;
 619         default:
 620                 break;
 621         }
 622
 623         if (sync_kconfig) {
 624                 name = getenv("KCONFIG_NOSILENTUPDATE");
 625                 if (name && *name) {
 626                         if (conf_get_changed()) {
 627                                 fprintf(stderr,
 628                                         "\n*** The configuration requires explicit update.\n\n");
 629                                 return 1;
 630                         }
 631                         no_conf_write = 1;
 632                 }
 633         }
 634
 635         switch (input_mode) {
 636         case allnoconfig:
 637                 conf_set_all_new_symbols(def_no);
 638                 break;
 639         case allyesconfig:
 640                 conf_set_all_new_symbols(def_yes);
 641                 break;
 642         case allmodconfig:
 643                 conf_set_all_new_symbols(def_mod);
 644                 break;
 645         case alldefconfig:
 646                 conf_set_all_new_symbols(def_default);
 647                 break;
 648         case randconfig:
 649                 /* Really nothing to do in this loop */
 650                 while (conf_set_all_new_symbols(def_random)) ;
 651                 break;
 652         case defconfig:
 653                 conf_set_all_new_symbols(def_default);
 654                 break;
 655         case savedefconfig:
 656                 break;
 657         case yes2modconfig:
 658                 conf_rewrite_mod_or_yes(def_y2m);
 659                 break;
 660         case mod2yesconfig:
 661                 conf_rewrite_mod_or_yes(def_m2y);
 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 ((output_file || !no_conf_write) &&
 691                     conf_write(output_file)) {
 692                         fprintf(stderr, "\n*** Error during writing of the configuration.\n\n");
 693                         exit(1);
 694                 }
 695
 696                 /*
 697                  * Create auto.conf if it does not exist.
 698                  * This prevents GNU Make 4.1 or older from emitting
 699                  * "include/config/auto.conf: No such file or directory"
 700                  * in the top-level Makefile
 701                  *
 702                  * syncconfig always creates or updates auto.conf because it is
 703                  * used during the build.
 704                  */
 705                 if (conf_write_autoconf(sync_kconfig) && sync_kconfig) {
 706                         fprintf(stderr,
 707                                 "\n*** Error during sync of the configuration.\n\n");
 708                         return 1;
 709                 }
 710         }
 711         return 0;
 712 }