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, conf_unsaved; 32 33 const char conf_defname[] = "arch/$ARCH/defconfig"; 34 35 static void conf_warning(const char *fmt, ...) 36 { 37 va_list ap; 38 va_start(ap, fmt); 39 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno); 40 vfprintf(stderr, fmt, ap); 41 fprintf(stderr, "\n"); 42 va_end(ap); 43 conf_warnings++; 44 } 45 46 static void conf_default_message_callback(const char *fmt, va_list ap) 47 { 48 printf("#\n# "); 49 vprintf(fmt, ap); 50 printf("\n#\n"); 51 } 52 53 static void (*conf_message_callback) (const char *fmt, va_list ap) = 54 conf_default_message_callback; 55 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap)) 56 { 57 conf_message_callback = fn; 58 } 59 60 static void conf_message(const char *fmt, ...) 61 { 62 va_list ap; 63 64 va_start(ap, fmt); 65 if (conf_message_callback) 66 conf_message_callback(fmt, ap); 67 va_end(ap); 68 } 69 70 const char *conf_get_configname(void) 71 { 72 char *name = getenv("KCONFIG_CONFIG"); 73 74 return name ? name : ".config"; 75 } 76 77 const char *conf_get_autoconfig_name(void) 78 { 79 char *name = getenv("KCONFIG_AUTOCONFIG"); 80 81 return name ? name : "include/config/auto.conf"; 82 } 83 84 static char *conf_expand_value(const char *in) 85 { 86 struct symbol *sym; 87 const char *src; 88 static char res_value[SYMBOL_MAXLENGTH]; 89 char *dst, name[SYMBOL_MAXLENGTH]; 90 91 res_value[0] = 0; 92 dst = name; 93 while ((src = strchr(in, '$'))) { 94 strncat(res_value, in, src - in); 95 src++; 96 dst = name; 97 while (isalnum(*src) || *src == '_') 98 *dst++ = *src++; 99 *dst = 0; 100 sym = sym_lookup(name, 0); 101 sym_calc_value(sym); 102 strcat(res_value, sym_get_string_value(sym)); 103 in = src; 104 } 105 strcat(res_value, in); 106 107 return res_value; 108 } 109 110 char *conf_get_default_confname(void) 111 { 112 struct stat buf; 113 static char fullname[PATH_MAX+1]; 114 char *env, *name; 115 116 name = conf_expand_value(conf_defname); 117 env = getenv(SRCTREE); 118 if (env) { 119 sprintf(fullname, "%s/%s", env, name); 120 if (!stat(fullname, &buf)) 121 return fullname; 122 } 123 return name; 124 } 125 126 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p) 127 { 128 char *p2; 129 130 switch (sym->type) { 131 case S_TRISTATE: 132 if (p[0] == 'm') { 133 sym->def[def].tri = mod; 134 sym->flags |= def_flags; 135 break; 136 } 137 /* fall through */ 138 case S_BOOLEAN: 139 if (p[0] == 'y') { 140 sym->def[def].tri = yes; 141 sym->flags |= def_flags; 142 break; 143 } 144 if (p[0] == 'n') { 145 sym->def[def].tri = no; 146 sym->flags |= def_flags; 147 break; 148 } 149 if (def != S_DEF_AUTO) 150 conf_warning("symbol value '%s' invalid for %s", 151 p, sym->name); 152 return 1; 153 case S_OTHER: 154 if (*p != '"') { 155 for (p2 = p; *p2 && !isspace(*p2); p2++) 156 ; 157 sym->type = S_STRING; 158 goto done; 159 } 160 /* fall through */ 161 case S_STRING: 162 if (*p++ != '"') 163 break; 164 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) { 165 if (*p2 == '"') { 166 *p2 = 0; 167 break; 168 } 169 memmove(p2, p2 + 1, strlen(p2)); 170 } 171 if (!p2) { 172 if (def != S_DEF_AUTO) 173 conf_warning("invalid string found"); 174 return 1; 175 } 176 /* fall through */ 177 case S_INT: 178 case S_HEX: 179 done: 180 if (sym_string_valid(sym, p)) { 181 sym->def[def].val = strdup(p); 182 sym->flags |= def_flags; 183 } else { 184 if (def != S_DEF_AUTO) 185 conf_warning("symbol value '%s' invalid for %s", 186 p, sym->name); 187 return 1; 188 } 189 break; 190 default: 191 ; 192 } 193 return 0; 194 } 195 196 #define LINE_GROWTH 16 197 static int add_byte(int c, char **lineptr, size_t slen, size_t *n) 198 { 199 char *nline; 200 size_t new_size = slen + 1; 201 if (new_size > *n) { 202 new_size += LINE_GROWTH - 1; 203 new_size *= 2; 204 nline = realloc(*lineptr, new_size); 205 if (!nline) 206 return -1; 207 208 *lineptr = nline; 209 *n = new_size; 210 } 211 212 (*lineptr)[slen] = c; 213 214 return 0; 215 } 216 217 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream) 218 { 219 char *line = *lineptr; 220 size_t slen = 0; 221 222 for (;;) { 223 int c = getc(stream); 224 225 switch (c) { 226 case '\n': 227 if (add_byte(c, &line, slen, n) < 0) 228 goto e_out; 229 slen++; 230 /* fall through */ 231 case EOF: 232 if (add_byte('\0', &line, slen, n) < 0) 233 goto e_out; 234 *lineptr = line; 235 if (slen == 0) 236 return -1; 237 return slen; 238 default: 239 if (add_byte(c, &line, slen, n) < 0) 240 goto e_out; 241 slen++; 242 } 243 } 244 245 e_out: 246 line[slen-1] = '\0'; 247 *lineptr = line; 248 return -1; 249 } 250 251 int conf_read_simple(const char *name, int def) 252 { 253 FILE *in = NULL; 254 char *line = NULL; 255 size_t line_asize = 0; 256 char *p, *p2; 257 struct symbol *sym; 258 int i, def_flags; 259 260 if (name) { 261 in = zconf_fopen(name); 262 } else { 263 struct property *prop; 264 265 name = conf_get_configname(); 266 in = zconf_fopen(name); 267 if (in) 268 goto load; 269 sym_add_change_count(1); 270 if (!sym_defconfig_list) 271 return 1; 272 273 for_all_defaults(sym_defconfig_list, prop) { 274 if (expr_calc_value(prop->visible.expr) == no || 275 prop->expr->type != E_SYMBOL) 276 continue; 277 name = conf_expand_value(prop->expr->left.sym->name); 278 in = zconf_fopen(name); 279 if (in) { 280 conf_message(_("using defaults found in %s"), 281 name); 282 goto load; 283 } 284 } 285 } 286 if (!in) 287 return 1; 288 289 load: 290 conf_filename = name; 291 conf_lineno = 0; 292 conf_warnings = 0; 293 conf_unsaved = 0; 294 295 def_flags = SYMBOL_DEF << def; 296 for_all_symbols(i, sym) { 297 sym->flags |= SYMBOL_CHANGED; 298 sym->flags &= ~(def_flags|SYMBOL_VALID); 299 if (sym_is_choice(sym)) 300 sym->flags |= def_flags; 301 switch (sym->type) { 302 case S_INT: 303 case S_HEX: 304 case S_STRING: 305 if (sym->def[def].val) 306 free(sym->def[def].val); 307 /* fall through */ 308 default: 309 sym->def[def].val = NULL; 310 sym->def[def].tri = no; 311 } 312 } 313 314 while (compat_getline(&line, &line_asize, in) != -1) { 315 conf_lineno++; 316 sym = NULL; 317 if (line[0] == '#') { 318 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_))) 319 continue; 320 p = strchr(line + 2 + strlen(CONFIG_), ' '); 321 if (!p) 322 continue; 323 *p++ = 0; 324 if (strncmp(p, "is not set", 10)) 325 continue; 326 if (def == S_DEF_USER) { 327 sym = sym_find(line + 2 + strlen(CONFIG_)); 328 if (!sym) { 329 sym_add_change_count(1); 330 goto setsym; 331 } 332 } else { 333 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0); 334 if (sym->type == S_UNKNOWN) 335 sym->type = S_BOOLEAN; 336 } 337 if (sym->flags & def_flags) { 338 conf_warning("override: reassigning to symbol %s", sym->name); 339 } 340 switch (sym->type) { 341 case S_BOOLEAN: 342 case S_TRISTATE: 343 sym->def[def].tri = no; 344 sym->flags |= def_flags; 345 break; 346 default: 347 ; 348 } 349 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) { 350 p = strchr(line + strlen(CONFIG_), '='); 351 if (!p) 352 continue; 353 *p++ = 0; 354 p2 = strchr(p, '\n'); 355 if (p2) { 356 *p2-- = 0; 357 if (*p2 == '\r') 358 *p2 = 0; 359 } 360 if (def == S_DEF_USER) { 361 sym = sym_find(line + strlen(CONFIG_)); 362 if (!sym) { 363 sym_add_change_count(1); 364 goto setsym; 365 } 366 } else { 367 sym = sym_lookup(line + strlen(CONFIG_), 0); 368 if (sym->type == S_UNKNOWN) 369 sym->type = S_OTHER; 370 } 371 if (sym->flags & def_flags) { 372 conf_warning("override: reassigning to symbol %s", sym->name); 373 } 374 if (conf_set_sym_val(sym, def, def_flags, p)) 375 continue; 376 } else { 377 if (line[0] != '\r' && line[0] != '\n') 378 conf_warning("unexpected data: %.*s", 379 (int)strcspn(line, "\r\n"), line); 380 381 continue; 382 } 383 setsym: 384 if (sym && sym_is_choice_value(sym)) { 385 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); 386 switch (sym->def[def].tri) { 387 case no: 388 break; 389 case mod: 390 if (cs->def[def].tri == yes) { 391 conf_warning("%s creates inconsistent choice state", sym->name); 392 cs->flags &= ~def_flags; 393 } 394 break; 395 case yes: 396 if (cs->def[def].tri != no) 397 conf_warning("override: %s changes choice state", sym->name); 398 cs->def[def].val = sym; 399 break; 400 } 401 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri); 402 } 403 } 404 free(line); 405 fclose(in); 406 return 0; 407 } 408 409 int conf_read(const char *name) 410 { 411 struct symbol *sym; 412 int i; 413 414 sym_set_change_count(0); 415 416 if (conf_read_simple(name, S_DEF_USER)) { 417 sym_calc_value(modules_sym); 418 return 1; 419 } 420 421 sym_calc_value(modules_sym); 422 423 for_all_symbols(i, sym) { 424 sym_calc_value(sym); 425 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO)) 426 continue; 427 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { 428 /* check that calculated value agrees with saved value */ 429 switch (sym->type) { 430 case S_BOOLEAN: 431 case S_TRISTATE: 432 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym)) 433 break; 434 if (!sym_is_choice(sym)) 435 continue; 436 /* fall through */ 437 default: 438 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val)) 439 continue; 440 break; 441 } 442 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE)) 443 /* no previous value and not saved */ 444 continue; 445 conf_unsaved++; 446 /* maybe print value in verbose mode... */ 447 } 448 449 for_all_symbols(i, sym) { 450 if (sym_has_value(sym) && !sym_is_choice_value(sym)) { 451 /* Reset values of generates values, so they'll appear 452 * as new, if they should become visible, but that 453 * doesn't quite work if the Kconfig and the saved 454 * configuration disagree. 455 */ 456 if (sym->visible == no && !conf_unsaved) 457 sym->flags &= ~SYMBOL_DEF_USER; 458 switch (sym->type) { 459 case S_STRING: 460 case S_INT: 461 case S_HEX: 462 /* Reset a string value if it's out of range */ 463 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val)) 464 break; 465 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER); 466 conf_unsaved++; 467 break; 468 default: 469 break; 470 } 471 } 472 } 473 474 sym_add_change_count(conf_warnings || conf_unsaved); 475 476 return 0; 477 } 478 479 /* 480 * Kconfig configuration printer 481 * 482 * This printer is used when generating the resulting configuration after 483 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by 484 * passing a non-NULL argument to the printer. 485 * 486 */ 487 static void 488 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 489 { 490 491 switch (sym->type) { 492 case S_BOOLEAN: 493 case S_TRISTATE: 494 if (*value == 'n') { 495 bool skip_unset = (arg != NULL); 496 497 if (!skip_unset) 498 fprintf(fp, "# %s%s is not set\n", 499 CONFIG_, sym->name); 500 return; 501 } 502 break; 503 default: 504 break; 505 } 506 507 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value); 508 } 509 510 static void 511 kconfig_print_comment(FILE *fp, const char *value, void *arg) 512 { 513 const char *p = value; 514 size_t l; 515 516 for (;;) { 517 l = strcspn(p, "\n"); 518 fprintf(fp, "#"); 519 if (l) { 520 fprintf(fp, " "); 521 xfwrite(p, l, 1, fp); 522 p += l; 523 } 524 fprintf(fp, "\n"); 525 if (*p++ == '\0') 526 break; 527 } 528 } 529 530 static struct conf_printer kconfig_printer_cb = 531 { 532 .print_symbol = kconfig_print_symbol, 533 .print_comment = kconfig_print_comment, 534 }; 535 536 /* 537 * Header printer 538 * 539 * This printer is used when generating the `include/generated/autoconf.h' file. 540 */ 541 static void 542 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 543 { 544 545 switch (sym->type) { 546 case S_BOOLEAN: 547 case S_TRISTATE: { 548 const char *suffix = ""; 549 550 switch (*value) { 551 case 'n': 552 break; 553 case 'm': 554 suffix = "_MODULE"; 555 /* fall through */ 556 default: 557 fprintf(fp, "#define %s%s%s 1\n", 558 CONFIG_, sym->name, suffix); 559 } 560 break; 561 } 562 case S_HEX: { 563 const char *prefix = ""; 564 565 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X')) 566 prefix = "0x"; 567 fprintf(fp, "#define %s%s %s%s\n", 568 CONFIG_, sym->name, prefix, value); 569 break; 570 } 571 case S_STRING: 572 case S_INT: 573 fprintf(fp, "#define %s%s %s\n", 574 CONFIG_, sym->name, value); 575 break; 576 default: 577 break; 578 } 579 580 } 581 582 static void 583 header_print_comment(FILE *fp, const char *value, void *arg) 584 { 585 const char *p = value; 586 size_t l; 587 588 fprintf(fp, "/*\n"); 589 for (;;) { 590 l = strcspn(p, "\n"); 591 fprintf(fp, " *"); 592 if (l) { 593 fprintf(fp, " "); 594 xfwrite(p, l, 1, fp); 595 p += l; 596 } 597 fprintf(fp, "\n"); 598 if (*p++ == '\0') 599 break; 600 } 601 fprintf(fp, " */\n"); 602 } 603 604 static struct conf_printer header_printer_cb = 605 { 606 .print_symbol = header_print_symbol, 607 .print_comment = header_print_comment, 608 }; 609 610 /* 611 * Tristate printer 612 * 613 * This printer is used when generating the `include/config/tristate.conf' file. 614 */ 615 static void 616 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 617 { 618 619 if (sym->type == S_TRISTATE && *value != 'n') 620 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value)); 621 } 622 623 static struct conf_printer tristate_printer_cb = 624 { 625 .print_symbol = tristate_print_symbol, 626 .print_comment = kconfig_print_comment, 627 }; 628 629 static void conf_write_symbol(FILE *fp, struct symbol *sym, 630 struct conf_printer *printer, void *printer_arg) 631 { 632 const char *str; 633 634 switch (sym->type) { 635 case S_OTHER: 636 case S_UNKNOWN: 637 break; 638 case S_STRING: 639 str = sym_get_string_value(sym); 640 str = sym_escape_string_value(str); 641 printer->print_symbol(fp, sym, str, printer_arg); 642 free((void *)str); 643 break; 644 default: 645 str = sym_get_string_value(sym); 646 printer->print_symbol(fp, sym, str, printer_arg); 647 } 648 } 649 650 static void 651 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg) 652 { 653 char buf[256]; 654 655 snprintf(buf, sizeof(buf), 656 "\n" 657 "Automatically generated file; DO NOT EDIT.\n" 658 "%s\n", 659 rootmenu.prompt->text); 660 661 printer->print_comment(fp, buf, printer_arg); 662 } 663 664 /* 665 * Write out a minimal config. 666 * All values that has default values are skipped as this is redundant. 667 */ 668 int conf_write_defconfig(const char *filename) 669 { 670 struct symbol *sym; 671 struct menu *menu; 672 FILE *out; 673 674 out = fopen(filename, "w"); 675 if (!out) 676 return 1; 677 678 sym_clear_all_valid(); 679 680 /* Traverse all menus to find all relevant symbols */ 681 menu = rootmenu.list; 682 683 while (menu != NULL) 684 { 685 sym = menu->sym; 686 if (sym == NULL) { 687 if (!menu_is_visible(menu)) 688 goto next_menu; 689 } else if (!sym_is_choice(sym)) { 690 sym_calc_value(sym); 691 if (!(sym->flags & SYMBOL_WRITE)) 692 goto next_menu; 693 sym->flags &= ~SYMBOL_WRITE; 694 /* If we cannot change the symbol - skip */ 695 if (!sym_is_changable(sym)) 696 goto next_menu; 697 /* If symbol equals to default value - skip */ 698 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0) 699 goto next_menu; 700 701 /* 702 * If symbol is a choice value and equals to the 703 * default for a choice - skip. 704 * But only if value is bool and equal to "y" and 705 * choice is not "optional". 706 * (If choice is "optional" then all values can be "n") 707 */ 708 if (sym_is_choice_value(sym)) { 709 struct symbol *cs; 710 struct symbol *ds; 711 712 cs = prop_get_symbol(sym_get_choice_prop(sym)); 713 ds = sym_choice_default(cs); 714 if (!sym_is_optional(cs) && sym == ds) { 715 if ((sym->type == S_BOOLEAN) && 716 sym_get_tristate_value(sym) == yes) 717 goto next_menu; 718 } 719 } 720 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 721 } 722 next_menu: 723 if (menu->list != NULL) { 724 menu = menu->list; 725 } 726 else if (menu->next != NULL) { 727 menu = menu->next; 728 } else { 729 while ((menu = menu->parent)) { 730 if (menu->next != NULL) { 731 menu = menu->next; 732 break; 733 } 734 } 735 } 736 } 737 fclose(out); 738 return 0; 739 } 740 741 int conf_write(const char *name) 742 { 743 FILE *out; 744 struct symbol *sym; 745 struct menu *menu; 746 const char *basename; 747 const char *str; 748 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1]; 749 char *env; 750 751 dirname[0] = 0; 752 if (name && name[0]) { 753 struct stat st; 754 char *slash; 755 756 if (!stat(name, &st) && S_ISDIR(st.st_mode)) { 757 strcpy(dirname, name); 758 strcat(dirname, "/"); 759 basename = conf_get_configname(); 760 } else if ((slash = strrchr(name, '/'))) { 761 int size = slash - name + 1; 762 memcpy(dirname, name, size); 763 dirname[size] = 0; 764 if (slash[1]) 765 basename = slash + 1; 766 else 767 basename = conf_get_configname(); 768 } else 769 basename = name; 770 } else 771 basename = conf_get_configname(); 772 773 sprintf(newname, "%s%s", dirname, basename); 774 env = getenv("KCONFIG_OVERWRITECONFIG"); 775 if (!env || !*env) { 776 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid()); 777 out = fopen(tmpname, "w"); 778 } else { 779 *tmpname = 0; 780 out = fopen(newname, "w"); 781 } 782 if (!out) 783 return 1; 784 785 conf_write_heading(out, &kconfig_printer_cb, NULL); 786 787 if (!conf_get_changed()) 788 sym_clear_all_valid(); 789 790 menu = rootmenu.list; 791 while (menu) { 792 sym = menu->sym; 793 if (!sym) { 794 if (!menu_is_visible(menu)) 795 goto next; 796 str = menu_get_prompt(menu); 797 fprintf(out, "\n" 798 "#\n" 799 "# %s\n" 800 "#\n", str); 801 } else if (!(sym->flags & SYMBOL_CHOICE)) { 802 sym_calc_value(sym); 803 if (!(sym->flags & SYMBOL_WRITE)) 804 goto next; 805 sym->flags &= ~SYMBOL_WRITE; 806 807 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 808 } 809 810 next: 811 if (menu->list) { 812 menu = menu->list; 813 continue; 814 } 815 if (menu->next) 816 menu = menu->next; 817 else while ((menu = menu->parent)) { 818 if (menu->next) { 819 menu = menu->next; 820 break; 821 } 822 } 823 } 824 fclose(out); 825 826 if (*tmpname) { 827 strcat(dirname, basename); 828 strcat(dirname, ".old"); 829 rename(newname, dirname); 830 if (rename(tmpname, newname)) 831 return 1; 832 } 833 834 conf_message(_("configuration written to %s"), newname); 835 836 sym_set_change_count(0); 837 838 return 0; 839 } 840 841 static int conf_split_config(void) 842 { 843 const char *name; 844 char path[PATH_MAX+1]; 845 char *s, *d, c; 846 struct symbol *sym; 847 struct stat sb; 848 int res, i, fd; 849 850 name = conf_get_autoconfig_name(); 851 conf_read_simple(name, S_DEF_AUTO); 852 sym_calc_value(modules_sym); 853 854 if (chdir("include/config")) 855 return 1; 856 857 res = 0; 858 for_all_symbols(i, sym) { 859 sym_calc_value(sym); 860 if ((sym->flags & SYMBOL_AUTO) || !sym->name) 861 continue; 862 if (sym->flags & SYMBOL_WRITE) { 863 if (sym->flags & SYMBOL_DEF_AUTO) { 864 /* 865 * symbol has old and new value, 866 * so compare them... 867 */ 868 switch (sym->type) { 869 case S_BOOLEAN: 870 case S_TRISTATE: 871 if (sym_get_tristate_value(sym) == 872 sym->def[S_DEF_AUTO].tri) 873 continue; 874 break; 875 case S_STRING: 876 case S_HEX: 877 case S_INT: 878 if (!strcmp(sym_get_string_value(sym), 879 sym->def[S_DEF_AUTO].val)) 880 continue; 881 break; 882 default: 883 break; 884 } 885 } else { 886 /* 887 * If there is no old value, only 'no' (unset) 888 * is allowed as new value. 889 */ 890 switch (sym->type) { 891 case S_BOOLEAN: 892 case S_TRISTATE: 893 if (sym_get_tristate_value(sym) == no) 894 continue; 895 break; 896 default: 897 break; 898 } 899 } 900 } else if (!(sym->flags & SYMBOL_DEF_AUTO)) 901 /* There is neither an old nor a new value. */ 902 continue; 903 /* else 904 * There is an old value, but no new value ('no' (unset) 905 * isn't saved in auto.conf, so the old value is always 906 * different from 'no'). 907 */ 908 909 /* Replace all '_' and append ".h" */ 910 s = sym->name; 911 d = path; 912 while ((c = *s++)) { 913 c = tolower(c); 914 *d++ = (c == '_') ? '/' : c; 915 } 916 strcpy(d, ".h"); 917 918 /* Assume directory path already exists. */ 919 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 920 if (fd == -1) { 921 if (errno != ENOENT) { 922 res = 1; 923 break; 924 } 925 /* 926 * Create directory components, 927 * unless they exist already. 928 */ 929 d = path; 930 while ((d = strchr(d, '/'))) { 931 *d = 0; 932 if (stat(path, &sb) && mkdir(path, 0755)) { 933 res = 1; 934 goto out; 935 } 936 *d++ = '/'; 937 } 938 /* Try it again. */ 939 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 940 if (fd == -1) { 941 res = 1; 942 break; 943 } 944 } 945 close(fd); 946 } 947 out: 948 if (chdir("../..")) 949 return 1; 950 951 return res; 952 } 953 954 int conf_write_autoconf(void) 955 { 956 struct symbol *sym; 957 const char *name; 958 FILE *out, *tristate, *out_h; 959 int i; 960 961 sym_clear_all_valid(); 962 963 file_write_dep("include/config/auto.conf.cmd"); 964 965 if (conf_split_config()) 966 return 1; 967 968 out = fopen(".tmpconfig", "w"); 969 if (!out) 970 return 1; 971 972 tristate = fopen(".tmpconfig_tristate", "w"); 973 if (!tristate) { 974 fclose(out); 975 return 1; 976 } 977 978 out_h = fopen(".tmpconfig.h", "w"); 979 if (!out_h) { 980 fclose(out); 981 fclose(tristate); 982 return 1; 983 } 984 985 conf_write_heading(out, &kconfig_printer_cb, NULL); 986 987 conf_write_heading(tristate, &tristate_printer_cb, NULL); 988 989 conf_write_heading(out_h, &header_printer_cb, NULL); 990 991 for_all_symbols(i, sym) { 992 sym_calc_value(sym); 993 if (!(sym->flags & SYMBOL_WRITE) || !sym->name) 994 continue; 995 996 /* write symbol to auto.conf, tristate and header files */ 997 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1); 998 999 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1); 1000 1001 conf_write_symbol(out_h, sym, &header_printer_cb, NULL); 1002 } 1003 fclose(out); 1004 fclose(tristate); 1005 fclose(out_h); 1006 1007 name = getenv("KCONFIG_AUTOHEADER"); 1008 if (!name) 1009 name = "include/generated/autoconf.h"; 1010 if (rename(".tmpconfig.h", name)) 1011 return 1; 1012 name = getenv("KCONFIG_TRISTATE"); 1013 if (!name) 1014 name = "include/config/tristate.conf"; 1015 if (rename(".tmpconfig_tristate", name)) 1016 return 1; 1017 name = conf_get_autoconfig_name(); 1018 /* 1019 * This must be the last step, kbuild has a dependency on auto.conf 1020 * and this marks the successful completion of the previous steps. 1021 */ 1022 if (rename(".tmpconfig", name)) 1023 return 1; 1024 1025 return 0; 1026 } 1027 1028 static int sym_change_count; 1029 static void (*conf_changed_callback)(void); 1030 1031 void sym_set_change_count(int count) 1032 { 1033 int _sym_change_count = sym_change_count; 1034 sym_change_count = count; 1035 if (conf_changed_callback && 1036 (bool)_sym_change_count != (bool)count) 1037 conf_changed_callback(); 1038 } 1039 1040 void sym_add_change_count(int count) 1041 { 1042 sym_set_change_count(count + sym_change_count); 1043 } 1044 1045 bool conf_get_changed(void) 1046 { 1047 return sym_change_count; 1048 } 1049 1050 void conf_set_changed_callback(void (*fn)(void)) 1051 { 1052 conf_changed_callback = fn; 1053 } 1054 1055 static bool randomize_choice_values(struct symbol *csym) 1056 { 1057 struct property *prop; 1058 struct symbol *sym; 1059 struct expr *e; 1060 int cnt, def; 1061 1062 /* 1063 * If choice is mod then we may have more items selected 1064 * and if no then no-one. 1065 * In both cases stop. 1066 */ 1067 if (csym->curr.tri != yes) 1068 return false; 1069 1070 prop = sym_get_choice_prop(csym); 1071 1072 /* count entries in choice block */ 1073 cnt = 0; 1074 expr_list_for_each_sym(prop->expr, e, sym) 1075 cnt++; 1076 1077 /* 1078 * find a random value and set it to yes, 1079 * set the rest to no so we have only one set 1080 */ 1081 def = (rand() % cnt); 1082 1083 cnt = 0; 1084 expr_list_for_each_sym(prop->expr, e, sym) { 1085 if (def == cnt++) { 1086 sym->def[S_DEF_USER].tri = yes; 1087 csym->def[S_DEF_USER].val = sym; 1088 } 1089 else { 1090 sym->def[S_DEF_USER].tri = no; 1091 } 1092 sym->flags |= SYMBOL_DEF_USER; 1093 /* clear VALID to get value calculated */ 1094 sym->flags &= ~SYMBOL_VALID; 1095 } 1096 csym->flags |= SYMBOL_DEF_USER; 1097 /* clear VALID to get value calculated */ 1098 csym->flags &= ~(SYMBOL_VALID); 1099 1100 return true; 1101 } 1102 1103 void set_all_choice_values(struct symbol *csym) 1104 { 1105 struct property *prop; 1106 struct symbol *sym; 1107 struct expr *e; 1108 1109 prop = sym_get_choice_prop(csym); 1110 1111 /* 1112 * Set all non-assinged choice values to no 1113 */ 1114 expr_list_for_each_sym(prop->expr, e, sym) { 1115 if (!sym_has_value(sym)) 1116 sym->def[S_DEF_USER].tri = no; 1117 } 1118 csym->flags |= SYMBOL_DEF_USER; 1119 /* clear VALID to get value calculated */ 1120 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES); 1121 } 1122 1123 bool conf_set_all_new_symbols(enum conf_def_mode mode) 1124 { 1125 struct symbol *sym, *csym; 1126 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y 1127 * pty: probability of tristate = y 1128 * ptm: probability of tristate = m 1129 */ 1130 1131 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case 1132 * below, otherwise gcc whines about 1133 * -Wmaybe-uninitialized */ 1134 if (mode == def_random) { 1135 int n, p[3]; 1136 char *env = getenv("KCONFIG_PROBABILITY"); 1137 n = 0; 1138 while( env && *env ) { 1139 char *endp; 1140 int tmp = strtol( env, &endp, 10 ); 1141 if( tmp >= 0 && tmp <= 100 ) { 1142 p[n++] = tmp; 1143 } else { 1144 errno = ERANGE; 1145 perror( "KCONFIG_PROBABILITY" ); 1146 exit( 1 ); 1147 } 1148 env = (*endp == ':') ? endp+1 : endp; 1149 if( n >=3 ) { 1150 break; 1151 } 1152 } 1153 switch( n ) { 1154 case 1: 1155 pby = p[0]; ptm = pby/2; pty = pby-ptm; 1156 break; 1157 case 2: 1158 pty = p[0]; ptm = p[1]; pby = pty + ptm; 1159 break; 1160 case 3: 1161 pby = p[0]; pty = p[1]; ptm = p[2]; 1162 break; 1163 } 1164 1165 if( pty+ptm > 100 ) { 1166 errno = ERANGE; 1167 perror( "KCONFIG_PROBABILITY" ); 1168 exit( 1 ); 1169 } 1170 } 1171 bool has_changed = false; 1172 1173 for_all_symbols(i, sym) { 1174 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID)) 1175 continue; 1176 switch (sym_get_type(sym)) { 1177 case S_BOOLEAN: 1178 case S_TRISTATE: 1179 has_changed = true; 1180 switch (mode) { 1181 case def_yes: 1182 sym->def[S_DEF_USER].tri = yes; 1183 break; 1184 case def_mod: 1185 sym->def[S_DEF_USER].tri = mod; 1186 break; 1187 case def_no: 1188 if (sym->flags & SYMBOL_ALLNOCONFIG_Y) 1189 sym->def[S_DEF_USER].tri = yes; 1190 else 1191 sym->def[S_DEF_USER].tri = no; 1192 break; 1193 case def_random: 1194 sym->def[S_DEF_USER].tri = no; 1195 cnt = rand() % 100; 1196 if (sym->type == S_TRISTATE) { 1197 if (cnt < pty) 1198 sym->def[S_DEF_USER].tri = yes; 1199 else if (cnt < (pty+ptm)) 1200 sym->def[S_DEF_USER].tri = mod; 1201 } else if (cnt < pby) 1202 sym->def[S_DEF_USER].tri = yes; 1203 break; 1204 default: 1205 continue; 1206 } 1207 if (!(sym_is_choice(sym) && mode == def_random)) 1208 sym->flags |= SYMBOL_DEF_USER; 1209 break; 1210 default: 1211 break; 1212 } 1213 1214 } 1215 1216 sym_clear_all_valid(); 1217 1218 /* 1219 * We have different type of choice blocks. 1220 * If curr.tri equals to mod then we can select several 1221 * choice symbols in one block. 1222 * In this case we do nothing. 1223 * If curr.tri equals yes then only one symbol can be 1224 * selected in a choice block and we set it to yes, 1225 * and the rest to no. 1226 */ 1227 if (mode != def_random) { 1228 for_all_symbols(i, csym) { 1229 if ((sym_is_choice(csym) && !sym_has_value(csym)) || 1230 sym_is_choice_value(csym)) 1231 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES; 1232 } 1233 } 1234 1235 for_all_symbols(i, csym) { 1236 if (sym_has_value(csym) || !sym_is_choice(csym)) 1237 continue; 1238 1239 sym_calc_value(csym); 1240 if (mode == def_random) 1241 has_changed = randomize_choice_values(csym); 1242 else { 1243 set_all_choice_values(csym); 1244 has_changed = true; 1245 } 1246 } 1247 1248 return has_changed; 1249 } 1250