1 /* 2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org> 3 * Released under the terms of the GNU GPL v2.0. 4 */ 5 6 #include <sys/stat.h> 7 #include <ctype.h> 8 #include <errno.h> 9 #include <fcntl.h> 10 #include <stdarg.h> 11 #include <stdio.h> 12 #include <stdlib.h> 13 #include <string.h> 14 #include <time.h> 15 #include <unistd.h> 16 17 #include "lkc.h" 18 19 struct conf_printer { 20 void (*print_symbol)(FILE *, struct symbol *, const char *, void *); 21 void (*print_comment)(FILE *, const char *, void *); 22 }; 23 24 static void conf_warning(const char *fmt, ...) 25 __attribute__ ((format (printf, 1, 2))); 26 27 static void conf_message(const char *fmt, ...) 28 __attribute__ ((format (printf, 1, 2))); 29 30 static const char *conf_filename; 31 static int conf_lineno, conf_warnings; 32 33 const char conf_defname[] = "arch/$(ARCH)/defconfig"; 34 35 static void conf_warning(const char *fmt, ...) 36 { 37 va_list ap; 38 va_start(ap, fmt); 39 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno); 40 vfprintf(stderr, fmt, ap); 41 fprintf(stderr, "\n"); 42 va_end(ap); 43 conf_warnings++; 44 } 45 46 static void conf_default_message_callback(const char *fmt, va_list ap) 47 { 48 printf("#\n# "); 49 vprintf(fmt, ap); 50 printf("\n#\n"); 51 } 52 53 static void (*conf_message_callback) (const char *fmt, va_list ap) = 54 conf_default_message_callback; 55 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap)) 56 { 57 conf_message_callback = fn; 58 } 59 60 static void conf_message(const char *fmt, ...) 61 { 62 va_list ap; 63 64 va_start(ap, fmt); 65 if (conf_message_callback) 66 conf_message_callback(fmt, ap); 67 va_end(ap); 68 } 69 70 const char *conf_get_configname(void) 71 { 72 char *name = getenv("KCONFIG_CONFIG"); 73 74 return name ? name : ".config"; 75 } 76 77 const char *conf_get_autoconfig_name(void) 78 { 79 char *name = getenv("KCONFIG_AUTOCONFIG"); 80 81 return name ? name : "include/config/auto.conf"; 82 } 83 84 char *conf_get_default_confname(void) 85 { 86 struct stat buf; 87 static char fullname[PATH_MAX+1]; 88 char *env, *name; 89 90 name = expand_string(conf_defname); 91 env = getenv(SRCTREE); 92 if (env) { 93 sprintf(fullname, "%s/%s", env, name); 94 if (!stat(fullname, &buf)) 95 return fullname; 96 } 97 return name; 98 } 99 100 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p) 101 { 102 char *p2; 103 104 switch (sym->type) { 105 case S_TRISTATE: 106 if (p[0] == 'm') { 107 sym->def[def].tri = mod; 108 sym->flags |= def_flags; 109 break; 110 } 111 /* fall through */ 112 case S_BOOLEAN: 113 if (p[0] == 'y') { 114 sym->def[def].tri = yes; 115 sym->flags |= def_flags; 116 break; 117 } 118 if (p[0] == 'n') { 119 sym->def[def].tri = no; 120 sym->flags |= def_flags; 121 break; 122 } 123 if (def != S_DEF_AUTO) 124 conf_warning("symbol value '%s' invalid for %s", 125 p, sym->name); 126 return 1; 127 case S_OTHER: 128 if (*p != '"') { 129 for (p2 = p; *p2 && !isspace(*p2); p2++) 130 ; 131 sym->type = S_STRING; 132 goto done; 133 } 134 /* fall through */ 135 case S_STRING: 136 if (*p++ != '"') 137 break; 138 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) { 139 if (*p2 == '"') { 140 *p2 = 0; 141 break; 142 } 143 memmove(p2, p2 + 1, strlen(p2)); 144 } 145 if (!p2) { 146 if (def != S_DEF_AUTO) 147 conf_warning("invalid string found"); 148 return 1; 149 } 150 /* fall through */ 151 case S_INT: 152 case S_HEX: 153 done: 154 if (sym_string_valid(sym, p)) { 155 sym->def[def].val = xstrdup(p); 156 sym->flags |= def_flags; 157 } else { 158 if (def != S_DEF_AUTO) 159 conf_warning("symbol value '%s' invalid for %s", 160 p, sym->name); 161 return 1; 162 } 163 break; 164 default: 165 ; 166 } 167 return 0; 168 } 169 170 #define LINE_GROWTH 16 171 static int add_byte(int c, char **lineptr, size_t slen, size_t *n) 172 { 173 char *nline; 174 size_t new_size = slen + 1; 175 if (new_size > *n) { 176 new_size += LINE_GROWTH - 1; 177 new_size *= 2; 178 nline = xrealloc(*lineptr, new_size); 179 if (!nline) 180 return -1; 181 182 *lineptr = nline; 183 *n = new_size; 184 } 185 186 (*lineptr)[slen] = c; 187 188 return 0; 189 } 190 191 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream) 192 { 193 char *line = *lineptr; 194 size_t slen = 0; 195 196 for (;;) { 197 int c = getc(stream); 198 199 switch (c) { 200 case '\n': 201 if (add_byte(c, &line, slen, n) < 0) 202 goto e_out; 203 slen++; 204 /* fall through */ 205 case EOF: 206 if (add_byte('\0', &line, slen, n) < 0) 207 goto e_out; 208 *lineptr = line; 209 if (slen == 0) 210 return -1; 211 return slen; 212 default: 213 if (add_byte(c, &line, slen, n) < 0) 214 goto e_out; 215 slen++; 216 } 217 } 218 219 e_out: 220 line[slen-1] = '\0'; 221 *lineptr = line; 222 return -1; 223 } 224 225 int conf_read_simple(const char *name, int def) 226 { 227 FILE *in = NULL; 228 char *line = NULL; 229 size_t line_asize = 0; 230 char *p, *p2; 231 struct symbol *sym; 232 int i, def_flags; 233 234 if (name) { 235 in = zconf_fopen(name); 236 } else { 237 struct property *prop; 238 239 name = conf_get_configname(); 240 in = zconf_fopen(name); 241 if (in) 242 goto load; 243 sym_add_change_count(1); 244 if (!sym_defconfig_list) 245 return 1; 246 247 for_all_defaults(sym_defconfig_list, prop) { 248 if (expr_calc_value(prop->visible.expr) == no || 249 prop->expr->type != E_SYMBOL) 250 continue; 251 sym_calc_value(prop->expr->left.sym); 252 name = sym_get_string_value(prop->expr->left.sym); 253 in = zconf_fopen(name); 254 if (in) { 255 conf_message("using defaults found in %s", 256 name); 257 goto load; 258 } 259 } 260 } 261 if (!in) 262 return 1; 263 264 load: 265 conf_filename = name; 266 conf_lineno = 0; 267 conf_warnings = 0; 268 269 def_flags = SYMBOL_DEF << def; 270 for_all_symbols(i, sym) { 271 sym->flags |= SYMBOL_CHANGED; 272 sym->flags &= ~(def_flags|SYMBOL_VALID); 273 if (sym_is_choice(sym)) 274 sym->flags |= def_flags; 275 switch (sym->type) { 276 case S_INT: 277 case S_HEX: 278 case S_STRING: 279 if (sym->def[def].val) 280 free(sym->def[def].val); 281 /* fall through */ 282 default: 283 sym->def[def].val = NULL; 284 sym->def[def].tri = no; 285 } 286 } 287 288 while (compat_getline(&line, &line_asize, in) != -1) { 289 conf_lineno++; 290 sym = NULL; 291 if (line[0] == '#') { 292 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_))) 293 continue; 294 p = strchr(line + 2 + strlen(CONFIG_), ' '); 295 if (!p) 296 continue; 297 *p++ = 0; 298 if (strncmp(p, "is not set", 10)) 299 continue; 300 if (def == S_DEF_USER) { 301 sym = sym_find(line + 2 + strlen(CONFIG_)); 302 if (!sym) { 303 sym_add_change_count(1); 304 goto setsym; 305 } 306 } else { 307 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0); 308 if (sym->type == S_UNKNOWN) 309 sym->type = S_BOOLEAN; 310 } 311 if (sym->flags & def_flags) { 312 conf_warning("override: reassigning to symbol %s", sym->name); 313 } 314 switch (sym->type) { 315 case S_BOOLEAN: 316 case S_TRISTATE: 317 sym->def[def].tri = no; 318 sym->flags |= def_flags; 319 break; 320 default: 321 ; 322 } 323 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) { 324 p = strchr(line + strlen(CONFIG_), '='); 325 if (!p) 326 continue; 327 *p++ = 0; 328 p2 = strchr(p, '\n'); 329 if (p2) { 330 *p2-- = 0; 331 if (*p2 == '\r') 332 *p2 = 0; 333 } 334 if (def == S_DEF_USER) { 335 sym = sym_find(line + strlen(CONFIG_)); 336 if (!sym) { 337 sym_add_change_count(1); 338 goto setsym; 339 } 340 } else { 341 sym = sym_lookup(line + strlen(CONFIG_), 0); 342 if (sym->type == S_UNKNOWN) 343 sym->type = S_OTHER; 344 } 345 if (sym->flags & def_flags) { 346 conf_warning("override: reassigning to symbol %s", sym->name); 347 } 348 if (conf_set_sym_val(sym, def, def_flags, p)) 349 continue; 350 } else { 351 if (line[0] != '\r' && line[0] != '\n') 352 conf_warning("unexpected data: %.*s", 353 (int)strcspn(line, "\r\n"), line); 354 355 continue; 356 } 357 setsym: 358 if (sym && sym_is_choice_value(sym)) { 359 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); 360 switch (sym->def[def].tri) { 361 case no: 362 break; 363 case mod: 364 if (cs->def[def].tri == yes) { 365 conf_warning("%s creates inconsistent choice state", sym->name); 366 cs->flags &= ~def_flags; 367 } 368 break; 369 case yes: 370 if (cs->def[def].tri != no) 371 conf_warning("override: %s changes choice state", sym->name); 372 cs->def[def].val = sym; 373 break; 374 } 375 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri); 376 } 377 } 378 free(line); 379 fclose(in); 380 return 0; 381 } 382 383 int conf_read(const char *name) 384 { 385 struct symbol *sym; 386 int conf_unsaved = 0; 387 int i; 388 389 sym_set_change_count(0); 390 391 if (conf_read_simple(name, S_DEF_USER)) { 392 sym_calc_value(modules_sym); 393 return 1; 394 } 395 396 sym_calc_value(modules_sym); 397 398 for_all_symbols(i, sym) { 399 sym_calc_value(sym); 400 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO)) 401 continue; 402 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { 403 /* check that calculated value agrees with saved value */ 404 switch (sym->type) { 405 case S_BOOLEAN: 406 case S_TRISTATE: 407 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym)) 408 break; 409 if (!sym_is_choice(sym)) 410 continue; 411 /* fall through */ 412 default: 413 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val)) 414 continue; 415 break; 416 } 417 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE)) 418 /* no previous value and not saved */ 419 continue; 420 conf_unsaved++; 421 /* maybe print value in verbose mode... */ 422 } 423 424 for_all_symbols(i, sym) { 425 if (sym_has_value(sym) && !sym_is_choice_value(sym)) { 426 /* Reset values of generates values, so they'll appear 427 * as new, if they should become visible, but that 428 * doesn't quite work if the Kconfig and the saved 429 * configuration disagree. 430 */ 431 if (sym->visible == no && !conf_unsaved) 432 sym->flags &= ~SYMBOL_DEF_USER; 433 switch (sym->type) { 434 case S_STRING: 435 case S_INT: 436 case S_HEX: 437 /* Reset a string value if it's out of range */ 438 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val)) 439 break; 440 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER); 441 conf_unsaved++; 442 break; 443 default: 444 break; 445 } 446 } 447 } 448 449 sym_add_change_count(conf_warnings || conf_unsaved); 450 451 return 0; 452 } 453 454 /* 455 * Kconfig configuration printer 456 * 457 * This printer is used when generating the resulting configuration after 458 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by 459 * passing a non-NULL argument to the printer. 460 * 461 */ 462 static void 463 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 464 { 465 466 switch (sym->type) { 467 case S_BOOLEAN: 468 case S_TRISTATE: 469 if (*value == 'n') { 470 bool skip_unset = (arg != NULL); 471 472 if (!skip_unset) 473 fprintf(fp, "# %s%s is not set\n", 474 CONFIG_, sym->name); 475 return; 476 } 477 break; 478 default: 479 break; 480 } 481 482 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value); 483 } 484 485 static void 486 kconfig_print_comment(FILE *fp, const char *value, void *arg) 487 { 488 const char *p = value; 489 size_t l; 490 491 for (;;) { 492 l = strcspn(p, "\n"); 493 fprintf(fp, "#"); 494 if (l) { 495 fprintf(fp, " "); 496 xfwrite(p, l, 1, fp); 497 p += l; 498 } 499 fprintf(fp, "\n"); 500 if (*p++ == '\0') 501 break; 502 } 503 } 504 505 static struct conf_printer kconfig_printer_cb = 506 { 507 .print_symbol = kconfig_print_symbol, 508 .print_comment = kconfig_print_comment, 509 }; 510 511 /* 512 * Header printer 513 * 514 * This printer is used when generating the `include/generated/autoconf.h' file. 515 */ 516 static void 517 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 518 { 519 520 switch (sym->type) { 521 case S_BOOLEAN: 522 case S_TRISTATE: { 523 const char *suffix = ""; 524 525 switch (*value) { 526 case 'n': 527 break; 528 case 'm': 529 suffix = "_MODULE"; 530 /* fall through */ 531 default: 532 fprintf(fp, "#define %s%s%s 1\n", 533 CONFIG_, sym->name, suffix); 534 } 535 break; 536 } 537 case S_HEX: { 538 const char *prefix = ""; 539 540 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X')) 541 prefix = "0x"; 542 fprintf(fp, "#define %s%s %s%s\n", 543 CONFIG_, sym->name, prefix, value); 544 break; 545 } 546 case S_STRING: 547 case S_INT: 548 fprintf(fp, "#define %s%s %s\n", 549 CONFIG_, sym->name, value); 550 break; 551 default: 552 break; 553 } 554 555 } 556 557 static void 558 header_print_comment(FILE *fp, const char *value, void *arg) 559 { 560 const char *p = value; 561 size_t l; 562 563 fprintf(fp, "/*\n"); 564 for (;;) { 565 l = strcspn(p, "\n"); 566 fprintf(fp, " *"); 567 if (l) { 568 fprintf(fp, " "); 569 xfwrite(p, l, 1, fp); 570 p += l; 571 } 572 fprintf(fp, "\n"); 573 if (*p++ == '\0') 574 break; 575 } 576 fprintf(fp, " */\n"); 577 } 578 579 static struct conf_printer header_printer_cb = 580 { 581 .print_symbol = header_print_symbol, 582 .print_comment = header_print_comment, 583 }; 584 585 /* 586 * Tristate printer 587 * 588 * This printer is used when generating the `include/config/tristate.conf' file. 589 */ 590 static void 591 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 592 { 593 594 if (sym->type == S_TRISTATE && *value != 'n') 595 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value)); 596 } 597 598 static struct conf_printer tristate_printer_cb = 599 { 600 .print_symbol = tristate_print_symbol, 601 .print_comment = kconfig_print_comment, 602 }; 603 604 static void conf_write_symbol(FILE *fp, struct symbol *sym, 605 struct conf_printer *printer, void *printer_arg) 606 { 607 const char *str; 608 609 switch (sym->type) { 610 case S_OTHER: 611 case S_UNKNOWN: 612 break; 613 case S_STRING: 614 str = sym_get_string_value(sym); 615 str = sym_escape_string_value(str); 616 printer->print_symbol(fp, sym, str, printer_arg); 617 free((void *)str); 618 break; 619 default: 620 str = sym_get_string_value(sym); 621 printer->print_symbol(fp, sym, str, printer_arg); 622 } 623 } 624 625 static void 626 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg) 627 { 628 char buf[256]; 629 630 snprintf(buf, sizeof(buf), 631 "\n" 632 "Automatically generated file; DO NOT EDIT.\n" 633 "%s\n", 634 rootmenu.prompt->text); 635 636 printer->print_comment(fp, buf, printer_arg); 637 } 638 639 /* 640 * Write out a minimal config. 641 * All values that has default values are skipped as this is redundant. 642 */ 643 int conf_write_defconfig(const char *filename) 644 { 645 struct symbol *sym; 646 struct menu *menu; 647 FILE *out; 648 649 out = fopen(filename, "w"); 650 if (!out) 651 return 1; 652 653 sym_clear_all_valid(); 654 655 /* Traverse all menus to find all relevant symbols */ 656 menu = rootmenu.list; 657 658 while (menu != NULL) 659 { 660 sym = menu->sym; 661 if (sym == NULL) { 662 if (!menu_is_visible(menu)) 663 goto next_menu; 664 } else if (!sym_is_choice(sym)) { 665 sym_calc_value(sym); 666 if (!(sym->flags & SYMBOL_WRITE)) 667 goto next_menu; 668 sym->flags &= ~SYMBOL_WRITE; 669 /* If we cannot change the symbol - skip */ 670 if (!sym_is_changable(sym)) 671 goto next_menu; 672 /* If symbol equals to default value - skip */ 673 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0) 674 goto next_menu; 675 676 /* 677 * If symbol is a choice value and equals to the 678 * default for a choice - skip. 679 * But only if value is bool and equal to "y" and 680 * choice is not "optional". 681 * (If choice is "optional" then all values can be "n") 682 */ 683 if (sym_is_choice_value(sym)) { 684 struct symbol *cs; 685 struct symbol *ds; 686 687 cs = prop_get_symbol(sym_get_choice_prop(sym)); 688 ds = sym_choice_default(cs); 689 if (!sym_is_optional(cs) && sym == ds) { 690 if ((sym->type == S_BOOLEAN) && 691 sym_get_tristate_value(sym) == yes) 692 goto next_menu; 693 } 694 } 695 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 696 } 697 next_menu: 698 if (menu->list != NULL) { 699 menu = menu->list; 700 } 701 else if (menu->next != NULL) { 702 menu = menu->next; 703 } else { 704 while ((menu = menu->parent)) { 705 if (menu->next != NULL) { 706 menu = menu->next; 707 break; 708 } 709 } 710 } 711 } 712 fclose(out); 713 return 0; 714 } 715 716 int conf_write(const char *name) 717 { 718 FILE *out; 719 struct symbol *sym; 720 struct menu *menu; 721 const char *basename; 722 const char *str; 723 char dirname[PATH_MAX+1], tmpname[PATH_MAX+22], newname[PATH_MAX+8]; 724 char *env; 725 726 dirname[0] = 0; 727 if (name && name[0]) { 728 struct stat st; 729 char *slash; 730 731 if (!stat(name, &st) && S_ISDIR(st.st_mode)) { 732 strcpy(dirname, name); 733 strcat(dirname, "/"); 734 basename = conf_get_configname(); 735 } else if ((slash = strrchr(name, '/'))) { 736 int size = slash - name + 1; 737 memcpy(dirname, name, size); 738 dirname[size] = 0; 739 if (slash[1]) 740 basename = slash + 1; 741 else 742 basename = conf_get_configname(); 743 } else 744 basename = name; 745 } else 746 basename = conf_get_configname(); 747 748 sprintf(newname, "%s%s", dirname, basename); 749 env = getenv("KCONFIG_OVERWRITECONFIG"); 750 if (!env || !*env) { 751 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid()); 752 out = fopen(tmpname, "w"); 753 } else { 754 *tmpname = 0; 755 out = fopen(newname, "w"); 756 } 757 if (!out) 758 return 1; 759 760 conf_write_heading(out, &kconfig_printer_cb, NULL); 761 762 if (!conf_get_changed()) 763 sym_clear_all_valid(); 764 765 menu = rootmenu.list; 766 while (menu) { 767 sym = menu->sym; 768 if (!sym) { 769 if (!menu_is_visible(menu)) 770 goto next; 771 str = menu_get_prompt(menu); 772 fprintf(out, "\n" 773 "#\n" 774 "# %s\n" 775 "#\n", str); 776 } else if (!(sym->flags & SYMBOL_CHOICE)) { 777 sym_calc_value(sym); 778 if (!(sym->flags & SYMBOL_WRITE)) 779 goto next; 780 sym->flags &= ~SYMBOL_WRITE; 781 782 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 783 } 784 785 next: 786 if (menu->list) { 787 menu = menu->list; 788 continue; 789 } 790 if (menu->next) 791 menu = menu->next; 792 else while ((menu = menu->parent)) { 793 if (menu->next) { 794 menu = menu->next; 795 break; 796 } 797 } 798 } 799 fclose(out); 800 801 if (*tmpname) { 802 strcat(dirname, basename); 803 strcat(dirname, ".old"); 804 rename(newname, dirname); 805 if (rename(tmpname, newname)) 806 return 1; 807 } 808 809 conf_message("configuration written to %s", newname); 810 811 sym_set_change_count(0); 812 813 return 0; 814 } 815 816 static int conf_split_config(void) 817 { 818 const char *name; 819 char path[PATH_MAX+1]; 820 char *s, *d, c; 821 struct symbol *sym; 822 struct stat sb; 823 int res, i, fd; 824 825 name = conf_get_autoconfig_name(); 826 conf_read_simple(name, S_DEF_AUTO); 827 sym_calc_value(modules_sym); 828 829 if (chdir("include/config")) 830 return 1; 831 832 res = 0; 833 for_all_symbols(i, sym) { 834 sym_calc_value(sym); 835 if ((sym->flags & SYMBOL_AUTO) || !sym->name) 836 continue; 837 if (sym->flags & SYMBOL_WRITE) { 838 if (sym->flags & SYMBOL_DEF_AUTO) { 839 /* 840 * symbol has old and new value, 841 * so compare them... 842 */ 843 switch (sym->type) { 844 case S_BOOLEAN: 845 case S_TRISTATE: 846 if (sym_get_tristate_value(sym) == 847 sym->def[S_DEF_AUTO].tri) 848 continue; 849 break; 850 case S_STRING: 851 case S_HEX: 852 case S_INT: 853 if (!strcmp(sym_get_string_value(sym), 854 sym->def[S_DEF_AUTO].val)) 855 continue; 856 break; 857 default: 858 break; 859 } 860 } else { 861 /* 862 * If there is no old value, only 'no' (unset) 863 * is allowed as new value. 864 */ 865 switch (sym->type) { 866 case S_BOOLEAN: 867 case S_TRISTATE: 868 if (sym_get_tristate_value(sym) == no) 869 continue; 870 break; 871 default: 872 break; 873 } 874 } 875 } else if (!(sym->flags & SYMBOL_DEF_AUTO)) 876 /* There is neither an old nor a new value. */ 877 continue; 878 /* else 879 * There is an old value, but no new value ('no' (unset) 880 * isn't saved in auto.conf, so the old value is always 881 * different from 'no'). 882 */ 883 884 /* Replace all '_' and append ".h" */ 885 s = sym->name; 886 d = path; 887 while ((c = *s++)) { 888 c = tolower(c); 889 *d++ = (c == '_') ? '/' : c; 890 } 891 strcpy(d, ".h"); 892 893 /* Assume directory path already exists. */ 894 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 895 if (fd == -1) { 896 if (errno != ENOENT) { 897 res = 1; 898 break; 899 } 900 /* 901 * Create directory components, 902 * unless they exist already. 903 */ 904 d = path; 905 while ((d = strchr(d, '/'))) { 906 *d = 0; 907 if (stat(path, &sb) && mkdir(path, 0755)) { 908 res = 1; 909 goto out; 910 } 911 *d++ = '/'; 912 } 913 /* Try it again. */ 914 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 915 if (fd == -1) { 916 res = 1; 917 break; 918 } 919 } 920 close(fd); 921 } 922 out: 923 if (chdir("../..")) 924 return 1; 925 926 return res; 927 } 928 929 int conf_write_autoconf(void) 930 { 931 struct symbol *sym; 932 const char *name; 933 FILE *out, *tristate, *out_h; 934 int i; 935 936 sym_clear_all_valid(); 937 938 file_write_dep("include/config/auto.conf.cmd"); 939 940 if (conf_split_config()) 941 return 1; 942 943 out = fopen(".tmpconfig", "w"); 944 if (!out) 945 return 1; 946 947 tristate = fopen(".tmpconfig_tristate", "w"); 948 if (!tristate) { 949 fclose(out); 950 return 1; 951 } 952 953 out_h = fopen(".tmpconfig.h", "w"); 954 if (!out_h) { 955 fclose(out); 956 fclose(tristate); 957 return 1; 958 } 959 960 conf_write_heading(out, &kconfig_printer_cb, NULL); 961 962 conf_write_heading(tristate, &tristate_printer_cb, NULL); 963 964 conf_write_heading(out_h, &header_printer_cb, NULL); 965 966 for_all_symbols(i, sym) { 967 sym_calc_value(sym); 968 if (!(sym->flags & SYMBOL_WRITE) || !sym->name) 969 continue; 970 971 /* write symbol to auto.conf, tristate and header files */ 972 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1); 973 974 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1); 975 976 conf_write_symbol(out_h, sym, &header_printer_cb, NULL); 977 } 978 fclose(out); 979 fclose(tristate); 980 fclose(out_h); 981 982 name = getenv("KCONFIG_AUTOHEADER"); 983 if (!name) 984 name = "include/generated/autoconf.h"; 985 if (rename(".tmpconfig.h", name)) 986 return 1; 987 name = getenv("KCONFIG_TRISTATE"); 988 if (!name) 989 name = "include/config/tristate.conf"; 990 if (rename(".tmpconfig_tristate", name)) 991 return 1; 992 name = conf_get_autoconfig_name(); 993 /* 994 * This must be the last step, kbuild has a dependency on auto.conf 995 * and this marks the successful completion of the previous steps. 996 */ 997 if (rename(".tmpconfig", name)) 998 return 1; 999 1000 return 0; 1001 } 1002 1003 static int sym_change_count; 1004 static void (*conf_changed_callback)(void); 1005 1006 void sym_set_change_count(int count) 1007 { 1008 int _sym_change_count = sym_change_count; 1009 sym_change_count = count; 1010 if (conf_changed_callback && 1011 (bool)_sym_change_count != (bool)count) 1012 conf_changed_callback(); 1013 } 1014 1015 void sym_add_change_count(int count) 1016 { 1017 sym_set_change_count(count + sym_change_count); 1018 } 1019 1020 bool conf_get_changed(void) 1021 { 1022 return sym_change_count; 1023 } 1024 1025 void conf_set_changed_callback(void (*fn)(void)) 1026 { 1027 conf_changed_callback = fn; 1028 } 1029 1030 static bool randomize_choice_values(struct symbol *csym) 1031 { 1032 struct property *prop; 1033 struct symbol *sym; 1034 struct expr *e; 1035 int cnt, def; 1036 1037 /* 1038 * If choice is mod then we may have more items selected 1039 * and if no then no-one. 1040 * In both cases stop. 1041 */ 1042 if (csym->curr.tri != yes) 1043 return false; 1044 1045 prop = sym_get_choice_prop(csym); 1046 1047 /* count entries in choice block */ 1048 cnt = 0; 1049 expr_list_for_each_sym(prop->expr, e, sym) 1050 cnt++; 1051 1052 /* 1053 * find a random value and set it to yes, 1054 * set the rest to no so we have only one set 1055 */ 1056 def = (rand() % cnt); 1057 1058 cnt = 0; 1059 expr_list_for_each_sym(prop->expr, e, sym) { 1060 if (def == cnt++) { 1061 sym->def[S_DEF_USER].tri = yes; 1062 csym->def[S_DEF_USER].val = sym; 1063 } 1064 else { 1065 sym->def[S_DEF_USER].tri = no; 1066 } 1067 sym->flags |= SYMBOL_DEF_USER; 1068 /* clear VALID to get value calculated */ 1069 sym->flags &= ~SYMBOL_VALID; 1070 } 1071 csym->flags |= SYMBOL_DEF_USER; 1072 /* clear VALID to get value calculated */ 1073 csym->flags &= ~(SYMBOL_VALID); 1074 1075 return true; 1076 } 1077 1078 void set_all_choice_values(struct symbol *csym) 1079 { 1080 struct property *prop; 1081 struct symbol *sym; 1082 struct expr *e; 1083 1084 prop = sym_get_choice_prop(csym); 1085 1086 /* 1087 * Set all non-assinged choice values to no 1088 */ 1089 expr_list_for_each_sym(prop->expr, e, sym) { 1090 if (!sym_has_value(sym)) 1091 sym->def[S_DEF_USER].tri = no; 1092 } 1093 csym->flags |= SYMBOL_DEF_USER; 1094 /* clear VALID to get value calculated */ 1095 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES); 1096 } 1097 1098 bool conf_set_all_new_symbols(enum conf_def_mode mode) 1099 { 1100 struct symbol *sym, *csym; 1101 int i, cnt, pby, pty, ptm; /* pby: probability of bool = y 1102 * pty: probability of tristate = y 1103 * ptm: probability of tristate = m 1104 */ 1105 1106 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case 1107 * below, otherwise gcc whines about 1108 * -Wmaybe-uninitialized */ 1109 if (mode == def_random) { 1110 int n, p[3]; 1111 char *env = getenv("KCONFIG_PROBABILITY"); 1112 n = 0; 1113 while( env && *env ) { 1114 char *endp; 1115 int tmp = strtol( env, &endp, 10 ); 1116 if( tmp >= 0 && tmp <= 100 ) { 1117 p[n++] = tmp; 1118 } else { 1119 errno = ERANGE; 1120 perror( "KCONFIG_PROBABILITY" ); 1121 exit( 1 ); 1122 } 1123 env = (*endp == ':') ? endp+1 : endp; 1124 if( n >=3 ) { 1125 break; 1126 } 1127 } 1128 switch( n ) { 1129 case 1: 1130 pby = p[0]; ptm = pby/2; pty = pby-ptm; 1131 break; 1132 case 2: 1133 pty = p[0]; ptm = p[1]; pby = pty + ptm; 1134 break; 1135 case 3: 1136 pby = p[0]; pty = p[1]; ptm = p[2]; 1137 break; 1138 } 1139 1140 if( pty+ptm > 100 ) { 1141 errno = ERANGE; 1142 perror( "KCONFIG_PROBABILITY" ); 1143 exit( 1 ); 1144 } 1145 } 1146 bool has_changed = false; 1147 1148 for_all_symbols(i, sym) { 1149 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID)) 1150 continue; 1151 switch (sym_get_type(sym)) { 1152 case S_BOOLEAN: 1153 case S_TRISTATE: 1154 has_changed = true; 1155 switch (mode) { 1156 case def_yes: 1157 sym->def[S_DEF_USER].tri = yes; 1158 break; 1159 case def_mod: 1160 sym->def[S_DEF_USER].tri = mod; 1161 break; 1162 case def_no: 1163 if (sym->flags & SYMBOL_ALLNOCONFIG_Y) 1164 sym->def[S_DEF_USER].tri = yes; 1165 else 1166 sym->def[S_DEF_USER].tri = no; 1167 break; 1168 case def_random: 1169 sym->def[S_DEF_USER].tri = no; 1170 cnt = rand() % 100; 1171 if (sym->type == S_TRISTATE) { 1172 if (cnt < pty) 1173 sym->def[S_DEF_USER].tri = yes; 1174 else if (cnt < (pty+ptm)) 1175 sym->def[S_DEF_USER].tri = mod; 1176 } else if (cnt < pby) 1177 sym->def[S_DEF_USER].tri = yes; 1178 break; 1179 default: 1180 continue; 1181 } 1182 if (!(sym_is_choice(sym) && mode == def_random)) 1183 sym->flags |= SYMBOL_DEF_USER; 1184 break; 1185 default: 1186 break; 1187 } 1188 1189 } 1190 1191 sym_clear_all_valid(); 1192 1193 /* 1194 * We have different type of choice blocks. 1195 * If curr.tri equals to mod then we can select several 1196 * choice symbols in one block. 1197 * In this case we do nothing. 1198 * If curr.tri equals yes then only one symbol can be 1199 * selected in a choice block and we set it to yes, 1200 * and the rest to no. 1201 */ 1202 if (mode != def_random) { 1203 for_all_symbols(i, csym) { 1204 if ((sym_is_choice(csym) && !sym_has_value(csym)) || 1205 sym_is_choice_value(csym)) 1206 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES; 1207 } 1208 } 1209 1210 for_all_symbols(i, csym) { 1211 if (sym_has_value(csym) || !sym_is_choice(csym)) 1212 continue; 1213 1214 sym_calc_value(csym); 1215 if (mode == def_random) 1216 has_changed = randomize_choice_values(csym); 1217 else { 1218 set_all_choice_values(csym); 1219 has_changed = true; 1220 } 1221 } 1222 1223 return has_changed; 1224 } 1225