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 static void conf_warning(const char *fmt, ...) 20 __attribute__ ((format (printf, 1, 2))); 21 22 static void conf_message(const char *fmt, ...) 23 __attribute__ ((format (printf, 1, 2))); 24 25 static const char *conf_filename; 26 static int conf_lineno, conf_warnings, conf_unsaved; 27 28 const char conf_defname[] = "arch/$ARCH/defconfig"; 29 30 static void conf_warning(const char *fmt, ...) 31 { 32 va_list ap; 33 va_start(ap, fmt); 34 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno); 35 vfprintf(stderr, fmt, ap); 36 fprintf(stderr, "\n"); 37 va_end(ap); 38 conf_warnings++; 39 } 40 41 static void conf_default_message_callback(const char *fmt, va_list ap) 42 { 43 printf("#\n# "); 44 vprintf(fmt, ap); 45 printf("\n#\n"); 46 } 47 48 static void (*conf_message_callback) (const char *fmt, va_list ap) = 49 conf_default_message_callback; 50 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap)) 51 { 52 conf_message_callback = fn; 53 } 54 55 static void conf_message(const char *fmt, ...) 56 { 57 va_list ap; 58 59 va_start(ap, fmt); 60 if (conf_message_callback) 61 conf_message_callback(fmt, ap); 62 } 63 64 const char *conf_get_configname(void) 65 { 66 char *name = getenv("KCONFIG_CONFIG"); 67 68 return name ? name : ".config"; 69 } 70 71 const char *conf_get_autoconfig_name(void) 72 { 73 char *name = getenv("KCONFIG_AUTOCONFIG"); 74 75 return name ? name : "include/config/auto.conf"; 76 } 77 78 static char *conf_expand_value(const char *in) 79 { 80 struct symbol *sym; 81 const char *src; 82 static char res_value[SYMBOL_MAXLENGTH]; 83 char *dst, name[SYMBOL_MAXLENGTH]; 84 85 res_value[0] = 0; 86 dst = name; 87 while ((src = strchr(in, '$'))) { 88 strncat(res_value, in, src - in); 89 src++; 90 dst = name; 91 while (isalnum(*src) || *src == '_') 92 *dst++ = *src++; 93 *dst = 0; 94 sym = sym_lookup(name, 0); 95 sym_calc_value(sym); 96 strcat(res_value, sym_get_string_value(sym)); 97 in = src; 98 } 99 strcat(res_value, in); 100 101 return res_value; 102 } 103 104 char *conf_get_default_confname(void) 105 { 106 struct stat buf; 107 static char fullname[PATH_MAX+1]; 108 char *env, *name; 109 110 name = conf_expand_value(conf_defname); 111 env = getenv(SRCTREE); 112 if (env) { 113 sprintf(fullname, "%s/%s", env, name); 114 if (!stat(fullname, &buf)) 115 return fullname; 116 } 117 return name; 118 } 119 120 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p) 121 { 122 char *p2; 123 124 switch (sym->type) { 125 case S_TRISTATE: 126 if (p[0] == 'm') { 127 sym->def[def].tri = mod; 128 sym->flags |= def_flags; 129 break; 130 } 131 /* fall through */ 132 case S_BOOLEAN: 133 if (p[0] == 'y') { 134 sym->def[def].tri = yes; 135 sym->flags |= def_flags; 136 break; 137 } 138 if (p[0] == 'n') { 139 sym->def[def].tri = no; 140 sym->flags |= def_flags; 141 break; 142 } 143 if (def != S_DEF_AUTO) 144 conf_warning("symbol value '%s' invalid for %s", 145 p, sym->name); 146 return 1; 147 case S_OTHER: 148 if (*p != '"') { 149 for (p2 = p; *p2 && !isspace(*p2); p2++) 150 ; 151 sym->type = S_STRING; 152 goto done; 153 } 154 /* fall through */ 155 case S_STRING: 156 if (*p++ != '"') 157 break; 158 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) { 159 if (*p2 == '"') { 160 *p2 = 0; 161 break; 162 } 163 memmove(p2, p2 + 1, strlen(p2)); 164 } 165 if (!p2) { 166 if (def != S_DEF_AUTO) 167 conf_warning("invalid string found"); 168 return 1; 169 } 170 /* fall through */ 171 case S_INT: 172 case S_HEX: 173 done: 174 if (sym_string_valid(sym, p)) { 175 sym->def[def].val = strdup(p); 176 sym->flags |= def_flags; 177 } else { 178 if (def != S_DEF_AUTO) 179 conf_warning("symbol value '%s' invalid for %s", 180 p, sym->name); 181 return 1; 182 } 183 break; 184 default: 185 ; 186 } 187 return 0; 188 } 189 190 #define LINE_GROWTH 16 191 static int add_byte(int c, char **lineptr, size_t slen, size_t *n) 192 { 193 char *nline; 194 size_t new_size = slen + 1; 195 if (new_size > *n) { 196 new_size += LINE_GROWTH - 1; 197 new_size *= 2; 198 nline = realloc(*lineptr, new_size); 199 if (!nline) 200 return -1; 201 202 *lineptr = nline; 203 *n = new_size; 204 } 205 206 (*lineptr)[slen] = c; 207 208 return 0; 209 } 210 211 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream) 212 { 213 char *line = *lineptr; 214 size_t slen = 0; 215 216 for (;;) { 217 int c = getc(stream); 218 219 switch (c) { 220 case '\n': 221 if (add_byte(c, &line, slen, n) < 0) 222 goto e_out; 223 slen++; 224 /* fall through */ 225 case EOF: 226 if (add_byte('\0', &line, slen, n) < 0) 227 goto e_out; 228 *lineptr = line; 229 if (slen == 0) 230 return -1; 231 return slen; 232 default: 233 if (add_byte(c, &line, slen, n) < 0) 234 goto e_out; 235 slen++; 236 } 237 } 238 239 e_out: 240 line[slen-1] = '\0'; 241 *lineptr = line; 242 return -1; 243 } 244 245 int conf_read_simple(const char *name, int def) 246 { 247 FILE *in = NULL; 248 char *line = NULL; 249 size_t line_asize = 0; 250 char *p, *p2; 251 struct symbol *sym; 252 int i, def_flags; 253 254 if (name) { 255 in = zconf_fopen(name); 256 } else { 257 struct property *prop; 258 259 name = conf_get_configname(); 260 in = zconf_fopen(name); 261 if (in) 262 goto load; 263 sym_add_change_count(1); 264 if (!sym_defconfig_list) { 265 if (modules_sym) 266 sym_calc_value(modules_sym); 267 return 1; 268 } 269 270 for_all_defaults(sym_defconfig_list, prop) { 271 if (expr_calc_value(prop->visible.expr) == no || 272 prop->expr->type != E_SYMBOL) 273 continue; 274 name = conf_expand_value(prop->expr->left.sym->name); 275 in = zconf_fopen(name); 276 if (in) { 277 conf_message(_("using defaults found in %s"), 278 name); 279 goto load; 280 } 281 } 282 } 283 if (!in) 284 return 1; 285 286 load: 287 conf_filename = name; 288 conf_lineno = 0; 289 conf_warnings = 0; 290 conf_unsaved = 0; 291 292 def_flags = SYMBOL_DEF << def; 293 for_all_symbols(i, sym) { 294 sym->flags |= SYMBOL_CHANGED; 295 sym->flags &= ~(def_flags|SYMBOL_VALID); 296 if (sym_is_choice(sym)) 297 sym->flags |= def_flags; 298 switch (sym->type) { 299 case S_INT: 300 case S_HEX: 301 case S_STRING: 302 if (sym->def[def].val) 303 free(sym->def[def].val); 304 /* fall through */ 305 default: 306 sym->def[def].val = NULL; 307 sym->def[def].tri = no; 308 } 309 } 310 311 while (compat_getline(&line, &line_asize, in) != -1) { 312 conf_lineno++; 313 sym = NULL; 314 if (line[0] == '#') { 315 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_))) 316 continue; 317 p = strchr(line + 2 + strlen(CONFIG_), ' '); 318 if (!p) 319 continue; 320 *p++ = 0; 321 if (strncmp(p, "is not set", 10)) 322 continue; 323 if (def == S_DEF_USER) { 324 sym = sym_find(line + 2 + strlen(CONFIG_)); 325 if (!sym) { 326 sym_add_change_count(1); 327 goto setsym; 328 } 329 } else { 330 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0); 331 if (sym->type == S_UNKNOWN) 332 sym->type = S_BOOLEAN; 333 } 334 if (sym->flags & def_flags) { 335 conf_warning("override: reassigning to symbol %s", sym->name); 336 } 337 switch (sym->type) { 338 case S_BOOLEAN: 339 case S_TRISTATE: 340 sym->def[def].tri = no; 341 sym->flags |= def_flags; 342 break; 343 default: 344 ; 345 } 346 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) { 347 p = strchr(line + strlen(CONFIG_), '='); 348 if (!p) 349 continue; 350 *p++ = 0; 351 p2 = strchr(p, '\n'); 352 if (p2) { 353 *p2-- = 0; 354 if (*p2 == '\r') 355 *p2 = 0; 356 } 357 if (def == S_DEF_USER) { 358 sym = sym_find(line + strlen(CONFIG_)); 359 if (!sym) { 360 sym_add_change_count(1); 361 goto setsym; 362 } 363 } else { 364 sym = sym_lookup(line + strlen(CONFIG_), 0); 365 if (sym->type == S_UNKNOWN) 366 sym->type = S_OTHER; 367 } 368 if (sym->flags & def_flags) { 369 conf_warning("override: reassigning to symbol %s", sym->name); 370 } 371 if (conf_set_sym_val(sym, def, def_flags, p)) 372 continue; 373 } else { 374 if (line[0] != '\r' && line[0] != '\n') 375 conf_warning("unexpected data"); 376 continue; 377 } 378 setsym: 379 if (sym && sym_is_choice_value(sym)) { 380 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); 381 switch (sym->def[def].tri) { 382 case no: 383 break; 384 case mod: 385 if (cs->def[def].tri == yes) { 386 conf_warning("%s creates inconsistent choice state", sym->name); 387 cs->flags &= ~def_flags; 388 } 389 break; 390 case yes: 391 if (cs->def[def].tri != no) 392 conf_warning("override: %s changes choice state", sym->name); 393 cs->def[def].val = sym; 394 break; 395 } 396 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri); 397 } 398 } 399 free(line); 400 fclose(in); 401 402 if (modules_sym) 403 sym_calc_value(modules_sym); 404 return 0; 405 } 406 407 int conf_read(const char *name) 408 { 409 struct symbol *sym; 410 int i; 411 412 sym_set_change_count(0); 413 414 if (conf_read_simple(name, S_DEF_USER)) 415 return 1; 416 417 for_all_symbols(i, sym) { 418 sym_calc_value(sym); 419 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO)) 420 continue; 421 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { 422 /* check that calculated value agrees with saved value */ 423 switch (sym->type) { 424 case S_BOOLEAN: 425 case S_TRISTATE: 426 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym)) 427 break; 428 if (!sym_is_choice(sym)) 429 continue; 430 /* fall through */ 431 default: 432 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val)) 433 continue; 434 break; 435 } 436 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE)) 437 /* no previous value and not saved */ 438 continue; 439 conf_unsaved++; 440 /* maybe print value in verbose mode... */ 441 } 442 443 for_all_symbols(i, sym) { 444 if (sym_has_value(sym) && !sym_is_choice_value(sym)) { 445 /* Reset values of generates values, so they'll appear 446 * as new, if they should become visible, but that 447 * doesn't quite work if the Kconfig and the saved 448 * configuration disagree. 449 */ 450 if (sym->visible == no && !conf_unsaved) 451 sym->flags &= ~SYMBOL_DEF_USER; 452 switch (sym->type) { 453 case S_STRING: 454 case S_INT: 455 case S_HEX: 456 /* Reset a string value if it's out of range */ 457 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val)) 458 break; 459 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER); 460 conf_unsaved++; 461 break; 462 default: 463 break; 464 } 465 } 466 } 467 468 sym_add_change_count(conf_warnings || conf_unsaved); 469 470 return 0; 471 } 472 473 /* 474 * Kconfig configuration printer 475 * 476 * This printer is used when generating the resulting configuration after 477 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by 478 * passing a non-NULL argument to the printer. 479 * 480 */ 481 static void 482 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 483 { 484 485 switch (sym->type) { 486 case S_BOOLEAN: 487 case S_TRISTATE: 488 if (*value == 'n') { 489 bool skip_unset = (arg != NULL); 490 491 if (!skip_unset) 492 fprintf(fp, "# %s%s is not set\n", 493 CONFIG_, sym->name); 494 return; 495 } 496 break; 497 default: 498 break; 499 } 500 501 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value); 502 } 503 504 static void 505 kconfig_print_comment(FILE *fp, const char *value, void *arg) 506 { 507 const char *p = value; 508 size_t l; 509 510 for (;;) { 511 l = strcspn(p, "\n"); 512 fprintf(fp, "#"); 513 if (l) { 514 fprintf(fp, " "); 515 xfwrite(p, l, 1, fp); 516 p += l; 517 } 518 fprintf(fp, "\n"); 519 if (*p++ == '\0') 520 break; 521 } 522 } 523 524 static struct conf_printer kconfig_printer_cb = 525 { 526 .print_symbol = kconfig_print_symbol, 527 .print_comment = kconfig_print_comment, 528 }; 529 530 /* 531 * Header printer 532 * 533 * This printer is used when generating the `include/generated/autoconf.h' file. 534 */ 535 static void 536 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 537 { 538 539 switch (sym->type) { 540 case S_BOOLEAN: 541 case S_TRISTATE: { 542 const char *suffix = ""; 543 544 switch (*value) { 545 case 'n': 546 break; 547 case 'm': 548 suffix = "_MODULE"; 549 /* fall through */ 550 default: 551 fprintf(fp, "#define %s%s%s 1\n", 552 CONFIG_, sym->name, suffix); 553 } 554 break; 555 } 556 case S_HEX: { 557 const char *prefix = ""; 558 559 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X')) 560 prefix = "0x"; 561 fprintf(fp, "#define %s%s %s%s\n", 562 CONFIG_, sym->name, prefix, value); 563 break; 564 } 565 case S_STRING: 566 case S_INT: 567 fprintf(fp, "#define %s%s %s\n", 568 CONFIG_, sym->name, value); 569 break; 570 default: 571 break; 572 } 573 574 } 575 576 static void 577 header_print_comment(FILE *fp, const char *value, void *arg) 578 { 579 const char *p = value; 580 size_t l; 581 582 fprintf(fp, "/*\n"); 583 for (;;) { 584 l = strcspn(p, "\n"); 585 fprintf(fp, " *"); 586 if (l) { 587 fprintf(fp, " "); 588 xfwrite(p, l, 1, fp); 589 p += l; 590 } 591 fprintf(fp, "\n"); 592 if (*p++ == '\0') 593 break; 594 } 595 fprintf(fp, " */\n"); 596 } 597 598 static struct conf_printer header_printer_cb = 599 { 600 .print_symbol = header_print_symbol, 601 .print_comment = header_print_comment, 602 }; 603 604 /* 605 * Tristate printer 606 * 607 * This printer is used when generating the `include/config/tristate.conf' file. 608 */ 609 static void 610 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 611 { 612 613 if (sym->type == S_TRISTATE && *value != 'n') 614 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value)); 615 } 616 617 static struct conf_printer tristate_printer_cb = 618 { 619 .print_symbol = tristate_print_symbol, 620 .print_comment = kconfig_print_comment, 621 }; 622 623 static void conf_write_symbol(FILE *fp, struct symbol *sym, 624 struct conf_printer *printer, void *printer_arg) 625 { 626 const char *str; 627 628 switch (sym->type) { 629 case S_OTHER: 630 case S_UNKNOWN: 631 break; 632 case S_STRING: 633 str = sym_get_string_value(sym); 634 str = sym_escape_string_value(str); 635 printer->print_symbol(fp, sym, str, printer_arg); 636 free((void *)str); 637 break; 638 default: 639 str = sym_get_string_value(sym); 640 printer->print_symbol(fp, sym, str, printer_arg); 641 } 642 } 643 644 static void 645 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg) 646 { 647 char buf[256]; 648 649 snprintf(buf, sizeof(buf), 650 "\n" 651 "Automatically generated file; DO NOT EDIT.\n" 652 "%s\n", 653 rootmenu.prompt->text); 654 655 printer->print_comment(fp, buf, printer_arg); 656 } 657 658 /* 659 * Write out a minimal config. 660 * All values that has default values are skipped as this is redundant. 661 */ 662 int conf_write_defconfig(const char *filename) 663 { 664 struct symbol *sym; 665 struct menu *menu; 666 FILE *out; 667 668 out = fopen(filename, "w"); 669 if (!out) 670 return 1; 671 672 sym_clear_all_valid(); 673 674 /* Traverse all menus to find all relevant symbols */ 675 menu = rootmenu.list; 676 677 while (menu != NULL) 678 { 679 sym = menu->sym; 680 if (sym == NULL) { 681 if (!menu_is_visible(menu)) 682 goto next_menu; 683 } else if (!sym_is_choice(sym)) { 684 sym_calc_value(sym); 685 if (!(sym->flags & SYMBOL_WRITE)) 686 goto next_menu; 687 sym->flags &= ~SYMBOL_WRITE; 688 /* If we cannot change the symbol - skip */ 689 if (!sym_is_changable(sym)) 690 goto next_menu; 691 /* If symbol equals to default value - skip */ 692 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0) 693 goto next_menu; 694 695 /* 696 * If symbol is a choice value and equals to the 697 * default for a choice - skip. 698 * But only if value is bool and equal to "y" and 699 * choice is not "optional". 700 * (If choice is "optional" then all values can be "n") 701 */ 702 if (sym_is_choice_value(sym)) { 703 struct symbol *cs; 704 struct symbol *ds; 705 706 cs = prop_get_symbol(sym_get_choice_prop(sym)); 707 ds = sym_choice_default(cs); 708 if (!sym_is_optional(cs) && sym == ds) { 709 if ((sym->type == S_BOOLEAN) && 710 sym_get_tristate_value(sym) == yes) 711 goto next_menu; 712 } 713 } 714 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 715 } 716 next_menu: 717 if (menu->list != NULL) { 718 menu = menu->list; 719 } 720 else if (menu->next != NULL) { 721 menu = menu->next; 722 } else { 723 while ((menu = menu->parent)) { 724 if (menu->next != NULL) { 725 menu = menu->next; 726 break; 727 } 728 } 729 } 730 } 731 fclose(out); 732 return 0; 733 } 734 735 int conf_write(const char *name) 736 { 737 FILE *out; 738 struct symbol *sym; 739 struct menu *menu; 740 const char *basename; 741 const char *str; 742 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1]; 743 char *env; 744 745 dirname[0] = 0; 746 if (name && name[0]) { 747 struct stat st; 748 char *slash; 749 750 if (!stat(name, &st) && S_ISDIR(st.st_mode)) { 751 strcpy(dirname, name); 752 strcat(dirname, "/"); 753 basename = conf_get_configname(); 754 } else if ((slash = strrchr(name, '/'))) { 755 int size = slash - name + 1; 756 memcpy(dirname, name, size); 757 dirname[size] = 0; 758 if (slash[1]) 759 basename = slash + 1; 760 else 761 basename = conf_get_configname(); 762 } else 763 basename = name; 764 } else 765 basename = conf_get_configname(); 766 767 sprintf(newname, "%s%s", dirname, basename); 768 env = getenv("KCONFIG_OVERWRITECONFIG"); 769 if (!env || !*env) { 770 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid()); 771 out = fopen(tmpname, "w"); 772 } else { 773 *tmpname = 0; 774 out = fopen(newname, "w"); 775 } 776 if (!out) 777 return 1; 778 779 conf_write_heading(out, &kconfig_printer_cb, NULL); 780 781 if (!conf_get_changed()) 782 sym_clear_all_valid(); 783 784 menu = rootmenu.list; 785 while (menu) { 786 sym = menu->sym; 787 if (!sym) { 788 if (!menu_is_visible(menu)) 789 goto next; 790 str = menu_get_prompt(menu); 791 fprintf(out, "\n" 792 "#\n" 793 "# %s\n" 794 "#\n", str); 795 } else if (!(sym->flags & SYMBOL_CHOICE)) { 796 sym_calc_value(sym); 797 if (!(sym->flags & SYMBOL_WRITE)) 798 goto next; 799 sym->flags &= ~SYMBOL_WRITE; 800 801 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 802 } 803 804 next: 805 if (menu->list) { 806 menu = menu->list; 807 continue; 808 } 809 if (menu->next) 810 menu = menu->next; 811 else while ((menu = menu->parent)) { 812 if (menu->next) { 813 menu = menu->next; 814 break; 815 } 816 } 817 } 818 fclose(out); 819 820 if (*tmpname) { 821 strcat(dirname, basename); 822 strcat(dirname, ".old"); 823 rename(newname, dirname); 824 if (rename(tmpname, newname)) 825 return 1; 826 } 827 828 conf_message(_("configuration written to %s"), newname); 829 830 sym_set_change_count(0); 831 832 return 0; 833 } 834 835 static int conf_split_config(void) 836 { 837 const char *name; 838 char path[PATH_MAX+1]; 839 char *s, *d, c; 840 struct symbol *sym; 841 struct stat sb; 842 int res, i, fd; 843 844 name = conf_get_autoconfig_name(); 845 conf_read_simple(name, S_DEF_AUTO); 846 847 if (chdir("include/config")) 848 return 1; 849 850 res = 0; 851 for_all_symbols(i, sym) { 852 sym_calc_value(sym); 853 if ((sym->flags & SYMBOL_AUTO) || !sym->name) 854 continue; 855 if (sym->flags & SYMBOL_WRITE) { 856 if (sym->flags & SYMBOL_DEF_AUTO) { 857 /* 858 * symbol has old and new value, 859 * so compare them... 860 */ 861 switch (sym->type) { 862 case S_BOOLEAN: 863 case S_TRISTATE: 864 if (sym_get_tristate_value(sym) == 865 sym->def[S_DEF_AUTO].tri) 866 continue; 867 break; 868 case S_STRING: 869 case S_HEX: 870 case S_INT: 871 if (!strcmp(sym_get_string_value(sym), 872 sym->def[S_DEF_AUTO].val)) 873 continue; 874 break; 875 default: 876 break; 877 } 878 } else { 879 /* 880 * If there is no old value, only 'no' (unset) 881 * is allowed as new value. 882 */ 883 switch (sym->type) { 884 case S_BOOLEAN: 885 case S_TRISTATE: 886 if (sym_get_tristate_value(sym) == no) 887 continue; 888 break; 889 default: 890 break; 891 } 892 } 893 } else if (!(sym->flags & SYMBOL_DEF_AUTO)) 894 /* There is neither an old nor a new value. */ 895 continue; 896 /* else 897 * There is an old value, but no new value ('no' (unset) 898 * isn't saved in auto.conf, so the old value is always 899 * different from 'no'). 900 */ 901 902 /* Replace all '_' and append ".h" */ 903 s = sym->name; 904 d = path; 905 while ((c = *s++)) { 906 c = tolower(c); 907 *d++ = (c == '_') ? '/' : c; 908 } 909 strcpy(d, ".h"); 910 911 /* Assume directory path already exists. */ 912 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 913 if (fd == -1) { 914 if (errno != ENOENT) { 915 res = 1; 916 break; 917 } 918 /* 919 * Create directory components, 920 * unless they exist already. 921 */ 922 d = path; 923 while ((d = strchr(d, '/'))) { 924 *d = 0; 925 if (stat(path, &sb) && mkdir(path, 0755)) { 926 res = 1; 927 goto out; 928 } 929 *d++ = '/'; 930 } 931 /* Try it again. */ 932 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 933 if (fd == -1) { 934 res = 1; 935 break; 936 } 937 } 938 close(fd); 939 } 940 out: 941 if (chdir("../..")) 942 return 1; 943 944 return res; 945 } 946 947 int conf_write_autoconf(void) 948 { 949 struct symbol *sym; 950 const char *name; 951 FILE *out, *tristate, *out_h; 952 int i; 953 954 sym_clear_all_valid(); 955 956 file_write_dep("include/config/auto.conf.cmd"); 957 958 if (conf_split_config()) 959 return 1; 960 961 out = fopen(".tmpconfig", "w"); 962 if (!out) 963 return 1; 964 965 tristate = fopen(".tmpconfig_tristate", "w"); 966 if (!tristate) { 967 fclose(out); 968 return 1; 969 } 970 971 out_h = fopen(".tmpconfig.h", "w"); 972 if (!out_h) { 973 fclose(out); 974 fclose(tristate); 975 return 1; 976 } 977 978 conf_write_heading(out, &kconfig_printer_cb, NULL); 979 980 conf_write_heading(tristate, &tristate_printer_cb, NULL); 981 982 conf_write_heading(out_h, &header_printer_cb, NULL); 983 984 for_all_symbols(i, sym) { 985 sym_calc_value(sym); 986 if (!(sym->flags & SYMBOL_WRITE) || !sym->name) 987 continue; 988 989 /* write symbol to auto.conf, tristate and header files */ 990 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1); 991 992 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1); 993 994 conf_write_symbol(out_h, sym, &header_printer_cb, NULL); 995 } 996 fclose(out); 997 fclose(tristate); 998 fclose(out_h); 999 1000 name = getenv("KCONFIG_AUTOHEADER"); 1001 if (!name) 1002 name = "include/generated/autoconf.h"; 1003 if (rename(".tmpconfig.h", name)) 1004 return 1; 1005 name = getenv("KCONFIG_TRISTATE"); 1006 if (!name) 1007 name = "include/config/tristate.conf"; 1008 if (rename(".tmpconfig_tristate", name)) 1009 return 1; 1010 name = conf_get_autoconfig_name(); 1011 /* 1012 * This must be the last step, kbuild has a dependency on auto.conf 1013 * and this marks the successful completion of the previous steps. 1014 */ 1015 if (rename(".tmpconfig", name)) 1016 return 1; 1017 1018 return 0; 1019 } 1020 1021 static int sym_change_count; 1022 static void (*conf_changed_callback)(void); 1023 1024 void sym_set_change_count(int count) 1025 { 1026 int _sym_change_count = sym_change_count; 1027 sym_change_count = count; 1028 if (conf_changed_callback && 1029 (bool)_sym_change_count != (bool)count) 1030 conf_changed_callback(); 1031 } 1032 1033 void sym_add_change_count(int count) 1034 { 1035 sym_set_change_count(count + sym_change_count); 1036 } 1037 1038 bool conf_get_changed(void) 1039 { 1040 return sym_change_count; 1041 } 1042 1043 void conf_set_changed_callback(void (*fn)(void)) 1044 { 1045 conf_changed_callback = fn; 1046 } 1047 1048 static bool randomize_choice_values(struct symbol *csym) 1049 { 1050 struct property *prop; 1051 struct symbol *sym; 1052 struct expr *e; 1053 int cnt, def; 1054 1055 /* 1056 * If choice is mod then we may have more items selected 1057 * and if no then no-one. 1058 * In both cases stop. 1059 */ 1060 if (csym->curr.tri != yes) 1061 return false; 1062 1063 prop = sym_get_choice_prop(csym); 1064 1065 /* count entries in choice block */ 1066 cnt = 0; 1067 expr_list_for_each_sym(prop->expr, e, sym) 1068 cnt++; 1069 1070 /* 1071 * find a random value and set it to yes, 1072 * set the rest to no so we have only one set 1073 */ 1074 def = (rand() % cnt); 1075 1076 cnt = 0; 1077 expr_list_for_each_sym(prop->expr, e, sym) { 1078 if (def == cnt++) { 1079 sym->def[S_DEF_USER].tri = yes; 1080 csym->def[S_DEF_USER].val = sym; 1081 } 1082 else { 1083 sym->def[S_DEF_USER].tri = no; 1084 } 1085 sym->flags |= SYMBOL_DEF_USER; 1086 /* clear VALID to get value calculated */ 1087 sym->flags &= ~SYMBOL_VALID; 1088 } 1089 csym->flags |= SYMBOL_DEF_USER; 1090 /* clear VALID to get value calculated */ 1091 csym->flags &= ~(SYMBOL_VALID); 1092 1093 return true; 1094 } 1095 1096 void set_all_choice_values(struct symbol *csym) 1097 { 1098 struct property *prop; 1099 struct symbol *sym; 1100 struct expr *e; 1101 1102 prop = sym_get_choice_prop(csym); 1103 1104 /* 1105 * Set all non-assinged choice values to no 1106 */ 1107 expr_list_for_each_sym(prop->expr, e, sym) { 1108 if (!sym_has_value(sym)) 1109 sym->def[S_DEF_USER].tri = no; 1110 } 1111 csym->flags |= SYMBOL_DEF_USER; 1112 /* clear VALID to get value calculated */ 1113 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES); 1114 } 1115 1116 bool conf_set_all_new_symbols(enum conf_def_mode mode) 1117 { 1118 struct symbol *sym, *csym; 1119 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y 1120 * pty: probability of tristate = y 1121 * ptm: probability of tristate = m 1122 */ 1123 1124 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case 1125 * below, otherwise gcc whines about 1126 * -Wmaybe-uninitialized */ 1127 if (mode == def_random) { 1128 int n, p[3]; 1129 char *env = getenv("KCONFIG_PROBABILITY"); 1130 n = 0; 1131 while( env && *env ) { 1132 char *endp; 1133 int tmp = strtol( env, &endp, 10 ); 1134 if( tmp >= 0 && tmp <= 100 ) { 1135 p[n++] = tmp; 1136 } else { 1137 errno = ERANGE; 1138 perror( "KCONFIG_PROBABILITY" ); 1139 exit( 1 ); 1140 } 1141 env = (*endp == ':') ? endp+1 : endp; 1142 if( n >=3 ) { 1143 break; 1144 } 1145 } 1146 switch( n ) { 1147 case 1: 1148 pby = p[0]; ptm = pby/2; pty = pby-ptm; 1149 break; 1150 case 2: 1151 pty = p[0]; ptm = p[1]; pby = pty + ptm; 1152 break; 1153 case 3: 1154 pby = p[0]; pty = p[1]; ptm = p[2]; 1155 break; 1156 } 1157 1158 if( pty+ptm > 100 ) { 1159 errno = ERANGE; 1160 perror( "KCONFIG_PROBABILITY" ); 1161 exit( 1 ); 1162 } 1163 } 1164 bool has_changed = false; 1165 1166 for_all_symbols(i, sym) { 1167 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID)) 1168 continue; 1169 switch (sym_get_type(sym)) { 1170 case S_BOOLEAN: 1171 case S_TRISTATE: 1172 has_changed = true; 1173 switch (mode) { 1174 case def_yes: 1175 sym->def[S_DEF_USER].tri = yes; 1176 break; 1177 case def_mod: 1178 sym->def[S_DEF_USER].tri = mod; 1179 break; 1180 case def_no: 1181 if (sym->flags & SYMBOL_ALLNOCONFIG_Y) 1182 sym->def[S_DEF_USER].tri = yes; 1183 else 1184 sym->def[S_DEF_USER].tri = no; 1185 break; 1186 case def_random: 1187 sym->def[S_DEF_USER].tri = no; 1188 cnt = rand() % 100; 1189 if (sym->type == S_TRISTATE) { 1190 if (cnt < pty) 1191 sym->def[S_DEF_USER].tri = yes; 1192 else if (cnt < (pty+ptm)) 1193 sym->def[S_DEF_USER].tri = mod; 1194 } else if (cnt < pby) 1195 sym->def[S_DEF_USER].tri = yes; 1196 break; 1197 default: 1198 continue; 1199 } 1200 if (!(sym_is_choice(sym) && mode == def_random)) 1201 sym->flags |= SYMBOL_DEF_USER; 1202 break; 1203 default: 1204 break; 1205 } 1206 1207 } 1208 1209 sym_clear_all_valid(); 1210 1211 /* 1212 * We have different type of choice blocks. 1213 * If curr.tri equals to mod then we can select several 1214 * choice symbols in one block. 1215 * In this case we do nothing. 1216 * If curr.tri equals yes then only one symbol can be 1217 * selected in a choice block and we set it to yes, 1218 * and the rest to no. 1219 */ 1220 if (mode != def_random) { 1221 for_all_symbols(i, csym) { 1222 if ((sym_is_choice(csym) && !sym_has_value(csym)) || 1223 sym_is_choice_value(csym)) 1224 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES; 1225 } 1226 } 1227 1228 for_all_symbols(i, csym) { 1229 if (sym_has_value(csym) || !sym_is_choice(csym)) 1230 continue; 1231 1232 sym_calc_value(csym); 1233 if (mode == def_random) 1234 has_changed = randomize_choice_values(csym); 1235 else { 1236 set_all_choice_values(csym); 1237 has_changed = true; 1238 } 1239 } 1240 1241 return has_changed; 1242 } 1243