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 /* Last char has to be a '"' */ 159 if (p[strlen(p) - 1] != '"') { 160 if (def != S_DEF_AUTO) 161 conf_warning("invalid string found"); 162 return 1; 163 } 164 /* Overwrite '"' with \0 for string termination */ 165 p[strlen(p) - 1] = 0; 166 /* fall through */ 167 case S_INT: 168 case S_HEX: 169 done: 170 if (sym_string_valid(sym, p)) { 171 sym->def[def].val = strdup(p); 172 sym->flags |= def_flags; 173 } else { 174 if (def != S_DEF_AUTO) 175 conf_warning("symbol value '%s' invalid for %s", 176 p, sym->name); 177 return 1; 178 } 179 break; 180 default: 181 ; 182 } 183 return 0; 184 } 185 186 #define LINE_GROWTH 16 187 static int add_byte(int c, char **lineptr, size_t slen, size_t *n) 188 { 189 char *nline; 190 size_t new_size = slen + 1; 191 if (new_size > *n) { 192 new_size += LINE_GROWTH - 1; 193 new_size *= 2; 194 nline = realloc(*lineptr, new_size); 195 if (!nline) 196 return -1; 197 198 *lineptr = nline; 199 *n = new_size; 200 } 201 202 (*lineptr)[slen] = c; 203 204 return 0; 205 } 206 207 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream) 208 { 209 char *line = *lineptr; 210 size_t slen = 0; 211 212 for (;;) { 213 int c = getc(stream); 214 215 switch (c) { 216 case '\n': 217 if (add_byte(c, &line, slen, n) < 0) 218 goto e_out; 219 slen++; 220 /* fall through */ 221 case EOF: 222 if (add_byte('\0', &line, slen, n) < 0) 223 goto e_out; 224 *lineptr = line; 225 if (slen == 0) 226 return -1; 227 return slen; 228 default: 229 if (add_byte(c, &line, slen, n) < 0) 230 goto e_out; 231 slen++; 232 } 233 } 234 235 e_out: 236 line[slen-1] = '\0'; 237 *lineptr = line; 238 return -1; 239 } 240 241 int conf_read_simple(const char *name, int def) 242 { 243 FILE *in = NULL; 244 char *line = NULL; 245 size_t line_asize = 0; 246 char *p, *p2; 247 struct symbol *sym; 248 int i, def_flags; 249 250 if (name) { 251 in = zconf_fopen(name); 252 } else { 253 struct property *prop; 254 255 name = conf_get_configname(); 256 in = zconf_fopen(name); 257 if (in) 258 goto load; 259 sym_add_change_count(1); 260 if (!sym_defconfig_list) { 261 if (modules_sym) 262 sym_calc_value(modules_sym); 263 return 1; 264 } 265 266 for_all_defaults(sym_defconfig_list, prop) { 267 if (expr_calc_value(prop->visible.expr) == no || 268 prop->expr->type != E_SYMBOL) 269 continue; 270 name = conf_expand_value(prop->expr->left.sym->name); 271 in = zconf_fopen(name); 272 if (in) { 273 conf_message(_("using defaults found in %s"), 274 name); 275 goto load; 276 } 277 } 278 } 279 if (!in) 280 return 1; 281 282 load: 283 conf_filename = name; 284 conf_lineno = 0; 285 conf_warnings = 0; 286 conf_unsaved = 0; 287 288 def_flags = SYMBOL_DEF << def; 289 for_all_symbols(i, sym) { 290 sym->flags |= SYMBOL_CHANGED; 291 sym->flags &= ~(def_flags|SYMBOL_VALID); 292 if (sym_is_choice(sym)) 293 sym->flags |= def_flags; 294 switch (sym->type) { 295 case S_INT: 296 case S_HEX: 297 case S_STRING: 298 if (sym->def[def].val) 299 free(sym->def[def].val); 300 /* fall through */ 301 default: 302 sym->def[def].val = NULL; 303 sym->def[def].tri = no; 304 } 305 } 306 307 while (compat_getline(&line, &line_asize, in) != -1) { 308 conf_lineno++; 309 sym = NULL; 310 if (line[0] == '#') { 311 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_))) 312 continue; 313 p = strchr(line + 2 + strlen(CONFIG_), ' '); 314 if (!p) 315 continue; 316 *p++ = 0; 317 if (strncmp(p, "is not set", 10)) 318 continue; 319 if (def == S_DEF_USER) { 320 sym = sym_find(line + 2 + strlen(CONFIG_)); 321 if (!sym) { 322 sym_add_change_count(1); 323 goto setsym; 324 } 325 } else { 326 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0); 327 if (sym->type == S_UNKNOWN) 328 sym->type = S_BOOLEAN; 329 } 330 if (sym->flags & def_flags) { 331 conf_warning("override: reassigning to symbol %s", sym->name); 332 } 333 switch (sym->type) { 334 case S_BOOLEAN: 335 case S_TRISTATE: 336 sym->def[def].tri = no; 337 sym->flags |= def_flags; 338 break; 339 default: 340 ; 341 } 342 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) { 343 p = strchr(line + strlen(CONFIG_), '='); 344 if (!p) 345 continue; 346 *p++ = 0; 347 p2 = strchr(p, '\n'); 348 if (p2) { 349 *p2-- = 0; 350 if (*p2 == '\r') 351 *p2 = 0; 352 } 353 if (def == S_DEF_USER) { 354 sym = sym_find(line + strlen(CONFIG_)); 355 if (!sym) { 356 sym_add_change_count(1); 357 goto setsym; 358 } 359 } else { 360 sym = sym_lookup(line + strlen(CONFIG_), 0); 361 if (sym->type == S_UNKNOWN) 362 sym->type = S_OTHER; 363 } 364 if (sym->flags & def_flags) { 365 conf_warning("override: reassigning to symbol %s", sym->name); 366 } 367 if (conf_set_sym_val(sym, def, def_flags, p)) 368 continue; 369 } else { 370 if (line[0] != '\r' && line[0] != '\n') 371 conf_warning("unexpected data"); 372 continue; 373 } 374 setsym: 375 if (sym && sym_is_choice_value(sym)) { 376 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); 377 switch (sym->def[def].tri) { 378 case no: 379 break; 380 case mod: 381 if (cs->def[def].tri == yes) { 382 conf_warning("%s creates inconsistent choice state", sym->name); 383 cs->flags &= ~def_flags; 384 } 385 break; 386 case yes: 387 if (cs->def[def].tri != no) 388 conf_warning("override: %s changes choice state", sym->name); 389 cs->def[def].val = sym; 390 break; 391 } 392 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri); 393 } 394 } 395 free(line); 396 fclose(in); 397 398 if (modules_sym) 399 sym_calc_value(modules_sym); 400 return 0; 401 } 402 403 int conf_read(const char *name) 404 { 405 struct symbol *sym; 406 int i; 407 408 sym_set_change_count(0); 409 410 if (conf_read_simple(name, S_DEF_USER)) 411 return 1; 412 413 for_all_symbols(i, sym) { 414 sym_calc_value(sym); 415 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO)) 416 continue; 417 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { 418 /* check that calculated value agrees with saved value */ 419 switch (sym->type) { 420 case S_BOOLEAN: 421 case S_TRISTATE: 422 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym)) 423 break; 424 if (!sym_is_choice(sym)) 425 continue; 426 /* fall through */ 427 default: 428 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val)) 429 continue; 430 break; 431 } 432 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE)) 433 /* no previous value and not saved */ 434 continue; 435 conf_unsaved++; 436 /* maybe print value in verbose mode... */ 437 } 438 439 for_all_symbols(i, sym) { 440 if (sym_has_value(sym) && !sym_is_choice_value(sym)) { 441 /* Reset values of generates values, so they'll appear 442 * as new, if they should become visible, but that 443 * doesn't quite work if the Kconfig and the saved 444 * configuration disagree. 445 */ 446 if (sym->visible == no && !conf_unsaved) 447 sym->flags &= ~SYMBOL_DEF_USER; 448 switch (sym->type) { 449 case S_STRING: 450 case S_INT: 451 case S_HEX: 452 /* Reset a string value if it's out of range */ 453 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val)) 454 break; 455 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER); 456 conf_unsaved++; 457 break; 458 default: 459 break; 460 } 461 } 462 } 463 464 sym_add_change_count(conf_warnings || conf_unsaved); 465 466 return 0; 467 } 468 469 /* 470 * Kconfig configuration printer 471 * 472 * This printer is used when generating the resulting configuration after 473 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by 474 * passing a non-NULL argument to the printer. 475 * 476 */ 477 static void 478 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 479 { 480 481 switch (sym->type) { 482 case S_BOOLEAN: 483 case S_TRISTATE: 484 if (*value == 'n') { 485 bool skip_unset = (arg != NULL); 486 487 if (!skip_unset) 488 fprintf(fp, "# %s%s is not set\n", 489 CONFIG_, sym->name); 490 return; 491 } 492 break; 493 default: 494 break; 495 } 496 497 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value); 498 } 499 500 static void 501 kconfig_print_comment(FILE *fp, const char *value, void *arg) 502 { 503 const char *p = value; 504 size_t l; 505 506 for (;;) { 507 l = strcspn(p, "\n"); 508 fprintf(fp, "#"); 509 if (l) { 510 fprintf(fp, " "); 511 xfwrite(p, l, 1, fp); 512 p += l; 513 } 514 fprintf(fp, "\n"); 515 if (*p++ == '\0') 516 break; 517 } 518 } 519 520 static struct conf_printer kconfig_printer_cb = 521 { 522 .print_symbol = kconfig_print_symbol, 523 .print_comment = kconfig_print_comment, 524 }; 525 526 /* 527 * Header printer 528 * 529 * This printer is used when generating the `include/generated/autoconf.h' file. 530 */ 531 static void 532 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 533 { 534 535 switch (sym->type) { 536 case S_BOOLEAN: 537 case S_TRISTATE: { 538 const char *suffix = ""; 539 540 switch (*value) { 541 case 'n': 542 break; 543 case 'm': 544 suffix = "_MODULE"; 545 /* fall through */ 546 default: 547 fprintf(fp, "#define %s%s%s 1\n", 548 CONFIG_, sym->name, suffix); 549 } 550 break; 551 } 552 case S_HEX: { 553 const char *prefix = ""; 554 555 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X')) 556 prefix = "0x"; 557 fprintf(fp, "#define %s%s %s%s\n", 558 CONFIG_, sym->name, prefix, value); 559 break; 560 } 561 case S_STRING: 562 case S_INT: 563 fprintf(fp, "#define %s%s %s\n", 564 CONFIG_, sym->name, value); 565 break; 566 default: 567 break; 568 } 569 570 } 571 572 static void 573 header_print_comment(FILE *fp, const char *value, void *arg) 574 { 575 const char *p = value; 576 size_t l; 577 578 fprintf(fp, "/*\n"); 579 for (;;) { 580 l = strcspn(p, "\n"); 581 fprintf(fp, " *"); 582 if (l) { 583 fprintf(fp, " "); 584 xfwrite(p, l, 1, fp); 585 p += l; 586 } 587 fprintf(fp, "\n"); 588 if (*p++ == '\0') 589 break; 590 } 591 fprintf(fp, " */\n"); 592 } 593 594 static struct conf_printer header_printer_cb = 595 { 596 .print_symbol = header_print_symbol, 597 .print_comment = header_print_comment, 598 }; 599 600 /* 601 * Tristate printer 602 * 603 * This printer is used when generating the `include/config/tristate.conf' file. 604 */ 605 static void 606 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 607 { 608 609 if (sym->type == S_TRISTATE && *value != 'n') 610 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value)); 611 } 612 613 static struct conf_printer tristate_printer_cb = 614 { 615 .print_symbol = tristate_print_symbol, 616 .print_comment = kconfig_print_comment, 617 }; 618 619 static void conf_write_symbol(FILE *fp, struct symbol *sym, 620 struct conf_printer *printer, void *printer_arg) 621 { 622 const char *str; 623 char *str2; 624 625 switch (sym->type) { 626 case S_OTHER: 627 case S_UNKNOWN: 628 break; 629 case S_STRING: 630 str = sym_get_string_value(sym); 631 str2 = xmalloc(strlen(str) + 3); 632 sprintf(str2, "\"%s\"", str); 633 printer->print_symbol(fp, sym, str2, printer_arg); 634 free((void *)str2); 635 break; 636 default: 637 str = sym_get_string_value(sym); 638 printer->print_symbol(fp, sym, str, printer_arg); 639 } 640 } 641 642 static void 643 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg) 644 { 645 char buf[256]; 646 647 snprintf(buf, sizeof(buf), 648 "\n" 649 "Automatically generated file; DO NOT EDIT.\n" 650 "%s\n", 651 rootmenu.prompt->text); 652 653 printer->print_comment(fp, buf, printer_arg); 654 } 655 656 /* 657 * Write out a minimal config. 658 * All values that has default values are skipped as this is redundant. 659 */ 660 int conf_write_defconfig(const char *filename) 661 { 662 struct symbol *sym; 663 struct menu *menu; 664 FILE *out; 665 666 out = fopen(filename, "w"); 667 if (!out) 668 return 1; 669 670 sym_clear_all_valid(); 671 672 /* Traverse all menus to find all relevant symbols */ 673 menu = rootmenu.list; 674 675 while (menu != NULL) 676 { 677 sym = menu->sym; 678 if (sym == NULL) { 679 if (!menu_is_visible(menu)) 680 goto next_menu; 681 } else if (!sym_is_choice(sym)) { 682 sym_calc_value(sym); 683 if (!(sym->flags & SYMBOL_WRITE)) 684 goto next_menu; 685 sym->flags &= ~SYMBOL_WRITE; 686 /* If we cannot change the symbol - skip */ 687 if (!sym_is_changable(sym)) 688 goto next_menu; 689 /* If symbol equals to default value - skip */ 690 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0) 691 goto next_menu; 692 693 /* 694 * If symbol is a choice value and equals to the 695 * default for a choice - skip. 696 * But only if value is bool and equal to "y" and 697 * choice is not "optional". 698 * (If choice is "optional" then all values can be "n") 699 */ 700 if (sym_is_choice_value(sym)) { 701 struct symbol *cs; 702 struct symbol *ds; 703 704 cs = prop_get_symbol(sym_get_choice_prop(sym)); 705 ds = sym_choice_default(cs); 706 if (!sym_is_optional(cs) && sym == ds) { 707 if ((sym->type == S_BOOLEAN) && 708 sym_get_tristate_value(sym) == yes) 709 goto next_menu; 710 } 711 } 712 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 713 } 714 next_menu: 715 if (menu->list != NULL) { 716 menu = menu->list; 717 } 718 else if (menu->next != NULL) { 719 menu = menu->next; 720 } else { 721 while ((menu = menu->parent)) { 722 if (menu->next != NULL) { 723 menu = menu->next; 724 break; 725 } 726 } 727 } 728 } 729 fclose(out); 730 return 0; 731 } 732 733 int conf_write(const char *name) 734 { 735 FILE *out; 736 struct symbol *sym; 737 struct menu *menu; 738 const char *basename; 739 const char *str; 740 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1]; 741 char *env; 742 743 dirname[0] = 0; 744 if (name && name[0]) { 745 struct stat st; 746 char *slash; 747 748 if (!stat(name, &st) && S_ISDIR(st.st_mode)) { 749 strcpy(dirname, name); 750 strcat(dirname, "/"); 751 basename = conf_get_configname(); 752 } else if ((slash = strrchr(name, '/'))) { 753 int size = slash - name + 1; 754 memcpy(dirname, name, size); 755 dirname[size] = 0; 756 if (slash[1]) 757 basename = slash + 1; 758 else 759 basename = conf_get_configname(); 760 } else 761 basename = name; 762 } else 763 basename = conf_get_configname(); 764 765 sprintf(newname, "%s%s", dirname, basename); 766 env = getenv("KCONFIG_OVERWRITECONFIG"); 767 if (!env || !*env) { 768 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid()); 769 out = fopen(tmpname, "w"); 770 } else { 771 *tmpname = 0; 772 out = fopen(newname, "w"); 773 } 774 if (!out) 775 return 1; 776 777 conf_write_heading(out, &kconfig_printer_cb, NULL); 778 779 if (!conf_get_changed()) 780 sym_clear_all_valid(); 781 782 menu = rootmenu.list; 783 while (menu) { 784 sym = menu->sym; 785 if (!sym) { 786 if (!menu_is_visible(menu)) 787 goto next; 788 str = menu_get_prompt(menu); 789 fprintf(out, "\n" 790 "#\n" 791 "# %s\n" 792 "#\n", str); 793 } else if (!(sym->flags & SYMBOL_CHOICE)) { 794 sym_calc_value(sym); 795 if (!(sym->flags & SYMBOL_WRITE)) 796 goto next; 797 sym->flags &= ~SYMBOL_WRITE; 798 799 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 800 } 801 802 next: 803 if (menu->list) { 804 menu = menu->list; 805 continue; 806 } 807 if (menu->next) 808 menu = menu->next; 809 else while ((menu = menu->parent)) { 810 if (menu->next) { 811 menu = menu->next; 812 break; 813 } 814 } 815 } 816 fclose(out); 817 818 if (*tmpname) { 819 strcat(dirname, basename); 820 strcat(dirname, ".old"); 821 rename(newname, dirname); 822 if (rename(tmpname, newname)) 823 return 1; 824 } 825 826 conf_message(_("configuration written to %s"), newname); 827 828 sym_set_change_count(0); 829 830 return 0; 831 } 832 833 static int conf_split_config(void) 834 { 835 const char *name; 836 char path[PATH_MAX+1]; 837 char *s, *d, c; 838 struct symbol *sym; 839 struct stat sb; 840 int res, i, fd; 841 842 name = conf_get_autoconfig_name(); 843 conf_read_simple(name, S_DEF_AUTO); 844 845 if (chdir("include/config")) 846 return 1; 847 848 res = 0; 849 for_all_symbols(i, sym) { 850 sym_calc_value(sym); 851 if ((sym->flags & SYMBOL_AUTO) || !sym->name) 852 continue; 853 if (sym->flags & SYMBOL_WRITE) { 854 if (sym->flags & SYMBOL_DEF_AUTO) { 855 /* 856 * symbol has old and new value, 857 * so compare them... 858 */ 859 switch (sym->type) { 860 case S_BOOLEAN: 861 case S_TRISTATE: 862 if (sym_get_tristate_value(sym) == 863 sym->def[S_DEF_AUTO].tri) 864 continue; 865 break; 866 case S_STRING: 867 case S_HEX: 868 case S_INT: 869 if (!strcmp(sym_get_string_value(sym), 870 sym->def[S_DEF_AUTO].val)) 871 continue; 872 break; 873 default: 874 break; 875 } 876 } else { 877 /* 878 * If there is no old value, only 'no' (unset) 879 * is allowed as new value. 880 */ 881 switch (sym->type) { 882 case S_BOOLEAN: 883 case S_TRISTATE: 884 if (sym_get_tristate_value(sym) == no) 885 continue; 886 break; 887 default: 888 break; 889 } 890 } 891 } else if (!(sym->flags & SYMBOL_DEF_AUTO)) 892 /* There is neither an old nor a new value. */ 893 continue; 894 /* else 895 * There is an old value, but no new value ('no' (unset) 896 * isn't saved in auto.conf, so the old value is always 897 * different from 'no'). 898 */ 899 900 /* Replace all '_' and append ".h" */ 901 s = sym->name; 902 d = path; 903 while ((c = *s++)) { 904 c = tolower(c); 905 *d++ = (c == '_') ? '/' : c; 906 } 907 strcpy(d, ".h"); 908 909 /* Assume directory path already exists. */ 910 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 911 if (fd == -1) { 912 if (errno != ENOENT) { 913 res = 1; 914 break; 915 } 916 /* 917 * Create directory components, 918 * unless they exist already. 919 */ 920 d = path; 921 while ((d = strchr(d, '/'))) { 922 *d = 0; 923 if (stat(path, &sb) && mkdir(path, 0755)) { 924 res = 1; 925 goto out; 926 } 927 *d++ = '/'; 928 } 929 /* Try it again. */ 930 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 931 if (fd == -1) { 932 res = 1; 933 break; 934 } 935 } 936 close(fd); 937 } 938 out: 939 if (chdir("../..")) 940 return 1; 941 942 return res; 943 } 944 945 int conf_write_autoconf(void) 946 { 947 struct symbol *sym; 948 const char *name; 949 FILE *out, *tristate, *out_h; 950 int i; 951 952 sym_clear_all_valid(); 953 954 file_write_dep("include/config/auto.conf.cmd"); 955 956 if (conf_split_config()) 957 return 1; 958 959 out = fopen(".tmpconfig", "w"); 960 if (!out) 961 return 1; 962 963 tristate = fopen(".tmpconfig_tristate", "w"); 964 if (!tristate) { 965 fclose(out); 966 return 1; 967 } 968 969 out_h = fopen(".tmpconfig.h", "w"); 970 if (!out_h) { 971 fclose(out); 972 fclose(tristate); 973 return 1; 974 } 975 976 conf_write_heading(out, &kconfig_printer_cb, NULL); 977 978 conf_write_heading(tristate, &tristate_printer_cb, NULL); 979 980 conf_write_heading(out_h, &header_printer_cb, NULL); 981 982 for_all_symbols(i, sym) { 983 sym_calc_value(sym); 984 if (!(sym->flags & SYMBOL_WRITE) || !sym->name) 985 continue; 986 987 /* write symbol to auto.conf, tristate and header files */ 988 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1); 989 990 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1); 991 992 conf_write_symbol(out_h, sym, &header_printer_cb, NULL); 993 } 994 fclose(out); 995 fclose(tristate); 996 fclose(out_h); 997 998 name = getenv("KCONFIG_AUTOHEADER"); 999 if (!name) 1000 name = "include/generated/autoconf.h"; 1001 if (rename(".tmpconfig.h", name)) 1002 return 1; 1003 name = getenv("KCONFIG_TRISTATE"); 1004 if (!name) 1005 name = "include/config/tristate.conf"; 1006 if (rename(".tmpconfig_tristate", name)) 1007 return 1; 1008 name = conf_get_autoconfig_name(); 1009 /* 1010 * This must be the last step, kbuild has a dependency on auto.conf 1011 * and this marks the successful completion of the previous steps. 1012 */ 1013 if (rename(".tmpconfig", name)) 1014 return 1; 1015 1016 return 0; 1017 } 1018 1019 static int sym_change_count; 1020 static void (*conf_changed_callback)(void); 1021 1022 void sym_set_change_count(int count) 1023 { 1024 int _sym_change_count = sym_change_count; 1025 sym_change_count = count; 1026 if (conf_changed_callback && 1027 (bool)_sym_change_count != (bool)count) 1028 conf_changed_callback(); 1029 } 1030 1031 void sym_add_change_count(int count) 1032 { 1033 sym_set_change_count(count + sym_change_count); 1034 } 1035 1036 bool conf_get_changed(void) 1037 { 1038 return sym_change_count; 1039 } 1040 1041 void conf_set_changed_callback(void (*fn)(void)) 1042 { 1043 conf_changed_callback = fn; 1044 } 1045 1046 static bool randomize_choice_values(struct symbol *csym) 1047 { 1048 struct property *prop; 1049 struct symbol *sym; 1050 struct expr *e; 1051 int cnt, def; 1052 1053 /* 1054 * If choice is mod then we may have more items selected 1055 * and if no then no-one. 1056 * In both cases stop. 1057 */ 1058 if (csym->curr.tri != yes) 1059 return false; 1060 1061 prop = sym_get_choice_prop(csym); 1062 1063 /* count entries in choice block */ 1064 cnt = 0; 1065 expr_list_for_each_sym(prop->expr, e, sym) 1066 cnt++; 1067 1068 /* 1069 * find a random value and set it to yes, 1070 * set the rest to no so we have only one set 1071 */ 1072 def = (rand() % cnt); 1073 1074 cnt = 0; 1075 expr_list_for_each_sym(prop->expr, e, sym) { 1076 if (def == cnt++) { 1077 sym->def[S_DEF_USER].tri = yes; 1078 csym->def[S_DEF_USER].val = sym; 1079 } 1080 else { 1081 sym->def[S_DEF_USER].tri = no; 1082 } 1083 sym->flags |= SYMBOL_DEF_USER; 1084 /* clear VALID to get value calculated */ 1085 sym->flags &= ~SYMBOL_VALID; 1086 } 1087 csym->flags |= SYMBOL_DEF_USER; 1088 /* clear VALID to get value calculated */ 1089 csym->flags &= ~(SYMBOL_VALID); 1090 1091 return true; 1092 } 1093 1094 void set_all_choice_values(struct symbol *csym) 1095 { 1096 struct property *prop; 1097 struct symbol *sym; 1098 struct expr *e; 1099 1100 prop = sym_get_choice_prop(csym); 1101 1102 /* 1103 * Set all non-assinged choice values to no 1104 */ 1105 expr_list_for_each_sym(prop->expr, e, sym) { 1106 if (!sym_has_value(sym)) 1107 sym->def[S_DEF_USER].tri = no; 1108 } 1109 csym->flags |= SYMBOL_DEF_USER; 1110 /* clear VALID to get value calculated */ 1111 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES); 1112 } 1113 1114 bool conf_set_all_new_symbols(enum conf_def_mode mode) 1115 { 1116 struct symbol *sym, *csym; 1117 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y 1118 * pty: probability of tristate = y 1119 * ptm: probability of tristate = m 1120 */ 1121 1122 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case 1123 * below, otherwise gcc whines about 1124 * -Wmaybe-uninitialized */ 1125 if (mode == def_random) { 1126 int n, p[3]; 1127 char *env = getenv("KCONFIG_PROBABILITY"); 1128 n = 0; 1129 while( env && *env ) { 1130 char *endp; 1131 int tmp = strtol( env, &endp, 10 ); 1132 if( tmp >= 0 && tmp <= 100 ) { 1133 p[n++] = tmp; 1134 } else { 1135 errno = ERANGE; 1136 perror( "KCONFIG_PROBABILITY" ); 1137 exit( 1 ); 1138 } 1139 env = (*endp == ':') ? endp+1 : endp; 1140 if( n >=3 ) { 1141 break; 1142 } 1143 } 1144 switch( n ) { 1145 case 1: 1146 pby = p[0]; ptm = pby/2; pty = pby-ptm; 1147 break; 1148 case 2: 1149 pty = p[0]; ptm = p[1]; pby = pty + ptm; 1150 break; 1151 case 3: 1152 pby = p[0]; pty = p[1]; ptm = p[2]; 1153 break; 1154 } 1155 1156 if( pty+ptm > 100 ) { 1157 errno = ERANGE; 1158 perror( "KCONFIG_PROBABILITY" ); 1159 exit( 1 ); 1160 } 1161 } 1162 bool has_changed = false; 1163 1164 for_all_symbols(i, sym) { 1165 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID)) 1166 continue; 1167 switch (sym_get_type(sym)) { 1168 case S_BOOLEAN: 1169 case S_TRISTATE: 1170 has_changed = true; 1171 switch (mode) { 1172 case def_yes: 1173 sym->def[S_DEF_USER].tri = yes; 1174 break; 1175 case def_mod: 1176 sym->def[S_DEF_USER].tri = mod; 1177 break; 1178 case def_no: 1179 if (sym->flags & SYMBOL_ALLNOCONFIG_Y) 1180 sym->def[S_DEF_USER].tri = yes; 1181 else 1182 sym->def[S_DEF_USER].tri = no; 1183 break; 1184 case def_random: 1185 sym->def[S_DEF_USER].tri = no; 1186 cnt = rand() % 100; 1187 if (sym->type == S_TRISTATE) { 1188 if (cnt < pty) 1189 sym->def[S_DEF_USER].tri = yes; 1190 else if (cnt < (pty+ptm)) 1191 sym->def[S_DEF_USER].tri = mod; 1192 } else if (cnt < pby) 1193 sym->def[S_DEF_USER].tri = yes; 1194 break; 1195 default: 1196 continue; 1197 } 1198 if (!(sym_is_choice(sym) && mode == def_random)) 1199 sym->flags |= SYMBOL_DEF_USER; 1200 break; 1201 default: 1202 break; 1203 } 1204 1205 } 1206 1207 sym_clear_all_valid(); 1208 1209 /* 1210 * We have different type of choice blocks. 1211 * If curr.tri equals to mod then we can select several 1212 * choice symbols in one block. 1213 * In this case we do nothing. 1214 * If curr.tri equals yes then only one symbol can be 1215 * selected in a choice block and we set it to yes, 1216 * and the rest to no. 1217 */ 1218 if (mode != def_random) { 1219 for_all_symbols(i, csym) { 1220 if ((sym_is_choice(csym) && !sym_has_value(csym)) || 1221 sym_is_choice_value(csym)) 1222 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES; 1223 } 1224 } 1225 1226 for_all_symbols(i, csym) { 1227 if (sym_has_value(csym) || !sym_is_choice(csym)) 1228 continue; 1229 1230 sym_calc_value(csym); 1231 if (mode == def_random) 1232 has_changed = randomize_choice_values(csym); 1233 else { 1234 set_all_choice_values(csym); 1235 has_changed = true; 1236 } 1237 } 1238 1239 return has_changed; 1240 } 1241