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/$ARCH/defconfig"; 34 35 static void conf_warning(const char *fmt, ...) 36 { 37 va_list ap; 38 va_start(ap, fmt); 39 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno); 40 vfprintf(stderr, fmt, ap); 41 fprintf(stderr, "\n"); 42 va_end(ap); 43 conf_warnings++; 44 } 45 46 static void conf_default_message_callback(const char *fmt, va_list ap) 47 { 48 printf("#\n# "); 49 vprintf(fmt, ap); 50 printf("\n#\n"); 51 } 52 53 static void (*conf_message_callback) (const char *fmt, va_list ap) = 54 conf_default_message_callback; 55 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap)) 56 { 57 conf_message_callback = fn; 58 } 59 60 static void conf_message(const char *fmt, ...) 61 { 62 va_list ap; 63 64 va_start(ap, fmt); 65 if (conf_message_callback) 66 conf_message_callback(fmt, ap); 67 va_end(ap); 68 } 69 70 const char *conf_get_configname(void) 71 { 72 char *name = getenv("KCONFIG_CONFIG"); 73 74 return name ? name : ".config"; 75 } 76 77 const char *conf_get_autoconfig_name(void) 78 { 79 char *name = getenv("KCONFIG_AUTOCONFIG"); 80 81 return name ? name : "include/config/auto.conf"; 82 } 83 84 static char *conf_expand_value(const char *in) 85 { 86 struct symbol *sym; 87 const char *src; 88 static char res_value[SYMBOL_MAXLENGTH]; 89 char *dst, name[SYMBOL_MAXLENGTH]; 90 91 res_value[0] = 0; 92 dst = name; 93 while ((src = strchr(in, '$'))) { 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 /* Last char has to be a '"' */ 165 if (p[strlen(p) - 1] != '"') { 166 if (def != S_DEF_AUTO) 167 conf_warning("invalid string found"); 168 return 1; 169 } 170 /* Overwrite '"' with \0 for string termination */ 171 p[strlen(p) - 1] = 0; 172 /* fall through */ 173 case S_INT: 174 case S_HEX: 175 done: 176 if (sym_string_valid(sym, p)) { 177 sym->def[def].val = xstrdup(p); 178 sym->flags |= def_flags; 179 } else { 180 if (def != S_DEF_AUTO) 181 conf_warning("symbol value '%s' invalid for %s", 182 p, sym->name); 183 return 1; 184 } 185 break; 186 default: 187 ; 188 } 189 return 0; 190 } 191 192 #define LINE_GROWTH 16 193 static int add_byte(int c, char **lineptr, size_t slen, size_t *n) 194 { 195 char *nline; 196 size_t new_size = slen + 1; 197 if (new_size > *n) { 198 new_size += LINE_GROWTH - 1; 199 new_size *= 2; 200 nline = xrealloc(*lineptr, new_size); 201 if (!nline) 202 return -1; 203 204 *lineptr = nline; 205 *n = new_size; 206 } 207 208 (*lineptr)[slen] = c; 209 210 return 0; 211 } 212 213 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream) 214 { 215 char *line = *lineptr; 216 size_t slen = 0; 217 218 for (;;) { 219 int c = getc(stream); 220 221 switch (c) { 222 case '\n': 223 if (add_byte(c, &line, slen, n) < 0) 224 goto e_out; 225 slen++; 226 /* fall through */ 227 case EOF: 228 if (add_byte('\0', &line, slen, n) < 0) 229 goto e_out; 230 *lineptr = line; 231 if (slen == 0) 232 return -1; 233 return slen; 234 default: 235 if (add_byte(c, &line, slen, n) < 0) 236 goto e_out; 237 slen++; 238 } 239 } 240 241 e_out: 242 line[slen-1] = '\0'; 243 *lineptr = line; 244 return -1; 245 } 246 247 int conf_read_simple(const char *name, int def) 248 { 249 FILE *in = NULL; 250 char *line = NULL; 251 size_t line_asize = 0; 252 char *p, *p2; 253 struct symbol *sym; 254 int i, def_flags; 255 256 if (name) { 257 in = zconf_fopen(name); 258 } else { 259 struct property *prop; 260 261 name = conf_get_configname(); 262 in = zconf_fopen(name); 263 if (in) 264 goto load; 265 sym_add_change_count(1); 266 if (!sym_defconfig_list) 267 return 1; 268 269 for_all_defaults(sym_defconfig_list, prop) { 270 if (expr_calc_value(prop->visible.expr) == no || 271 prop->expr->type != E_SYMBOL) 272 continue; 273 name = conf_expand_value(prop->expr->left.sym->name); 274 in = zconf_fopen(name); 275 if (in) { 276 conf_message(_("using defaults found in %s"), 277 name); 278 goto load; 279 } 280 } 281 } 282 if (!in) 283 return 1; 284 285 load: 286 conf_filename = name; 287 conf_lineno = 0; 288 conf_warnings = 0; 289 290 def_flags = SYMBOL_DEF << def; 291 for_all_symbols(i, sym) { 292 sym->flags |= SYMBOL_CHANGED; 293 sym->flags &= ~(def_flags|SYMBOL_VALID); 294 if (sym_is_choice(sym)) 295 sym->flags |= def_flags; 296 switch (sym->type) { 297 case S_INT: 298 case S_HEX: 299 case S_STRING: 300 if (sym->def[def].val) 301 free(sym->def[def].val); 302 /* fall through */ 303 default: 304 sym->def[def].val = NULL; 305 sym->def[def].tri = no; 306 } 307 } 308 309 while (compat_getline(&line, &line_asize, in) != -1) { 310 conf_lineno++; 311 sym = NULL; 312 if (line[0] == '#') { 313 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_))) 314 continue; 315 p = strchr(line + 2 + strlen(CONFIG_), ' '); 316 if (!p) 317 continue; 318 *p++ = 0; 319 if (strncmp(p, "is not set", 10)) 320 continue; 321 if (def == S_DEF_USER) { 322 sym = sym_find(line + 2 + strlen(CONFIG_)); 323 if (!sym) { 324 sym_add_change_count(1); 325 goto setsym; 326 } 327 } else { 328 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0); 329 if (sym->type == S_UNKNOWN) 330 sym->type = S_BOOLEAN; 331 } 332 if (sym->flags & def_flags) { 333 conf_warning("override: reassigning to symbol %s", sym->name); 334 } 335 switch (sym->type) { 336 case S_BOOLEAN: 337 case S_TRISTATE: 338 sym->def[def].tri = no; 339 sym->flags |= def_flags; 340 break; 341 default: 342 ; 343 } 344 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) { 345 p = strchr(line + strlen(CONFIG_), '='); 346 if (!p) 347 continue; 348 *p++ = 0; 349 p2 = strchr(p, '\n'); 350 if (p2) { 351 *p2-- = 0; 352 if (*p2 == '\r') 353 *p2 = 0; 354 } 355 if (def == S_DEF_USER) { 356 sym = sym_find(line + strlen(CONFIG_)); 357 if (!sym) { 358 sym_add_change_count(1); 359 goto setsym; 360 } 361 } else { 362 sym = sym_lookup(line + strlen(CONFIG_), 0); 363 if (sym->type == S_UNKNOWN) 364 sym->type = S_OTHER; 365 } 366 if (sym->flags & def_flags) { 367 conf_warning("override: reassigning to symbol %s", sym->name); 368 } 369 if (conf_set_sym_val(sym, def, def_flags, p)) 370 continue; 371 } else { 372 if (line[0] != '\r' && line[0] != '\n') 373 conf_warning("unexpected data: %.*s", 374 (int)strcspn(line, "\r\n"), line); 375 376 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 return 0; 402 } 403 404 int conf_read(const char *name) 405 { 406 struct symbol *sym; 407 int conf_unsaved = 0; 408 int i; 409 410 sym_set_change_count(0); 411 412 if (conf_read_simple(name, S_DEF_USER)) { 413 sym_calc_value(modules_sym); 414 return 1; 415 } 416 417 sym_calc_value(modules_sym); 418 419 for_all_symbols(i, sym) { 420 sym_calc_value(sym); 421 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO)) 422 continue; 423 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { 424 /* check that calculated value agrees with saved value */ 425 switch (sym->type) { 426 case S_BOOLEAN: 427 case S_TRISTATE: 428 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym)) 429 break; 430 if (!sym_is_choice(sym)) 431 continue; 432 /* fall through */ 433 default: 434 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val)) 435 continue; 436 break; 437 } 438 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE)) 439 /* no previous value and not saved */ 440 continue; 441 conf_unsaved++; 442 /* maybe print value in verbose mode... */ 443 } 444 445 for_all_symbols(i, sym) { 446 if (sym_has_value(sym) && !sym_is_choice_value(sym)) { 447 /* Reset values of generates values, so they'll appear 448 * as new, if they should become visible, but that 449 * doesn't quite work if the Kconfig and the saved 450 * configuration disagree. 451 */ 452 if (sym->visible == no && !conf_unsaved) 453 sym->flags &= ~SYMBOL_DEF_USER; 454 switch (sym->type) { 455 case S_STRING: 456 case S_INT: 457 case S_HEX: 458 /* Reset a string value if it's out of range */ 459 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val)) 460 break; 461 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER); 462 conf_unsaved++; 463 break; 464 default: 465 break; 466 } 467 } 468 } 469 470 sym_add_change_count(conf_warnings || conf_unsaved); 471 472 return 0; 473 } 474 475 /* 476 * Kconfig configuration printer 477 * 478 * This printer is used when generating the resulting configuration after 479 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by 480 * passing a non-NULL argument to the printer. 481 * 482 */ 483 static void 484 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 485 { 486 487 switch (sym->type) { 488 case S_BOOLEAN: 489 case S_TRISTATE: 490 if (*value == 'n') { 491 bool skip_unset = (arg != NULL); 492 493 if (!skip_unset) 494 fprintf(fp, "# %s%s is not set\n", 495 CONFIG_, sym->name); 496 return; 497 } 498 break; 499 default: 500 break; 501 } 502 503 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value); 504 } 505 506 static void 507 kconfig_print_comment(FILE *fp, const char *value, void *arg) 508 { 509 const char *p = value; 510 size_t l; 511 512 for (;;) { 513 l = strcspn(p, "\n"); 514 fprintf(fp, "#"); 515 if (l) { 516 fprintf(fp, " "); 517 xfwrite(p, l, 1, fp); 518 p += l; 519 } 520 fprintf(fp, "\n"); 521 if (*p++ == '\0') 522 break; 523 } 524 } 525 526 static struct conf_printer kconfig_printer_cb = 527 { 528 .print_symbol = kconfig_print_symbol, 529 .print_comment = kconfig_print_comment, 530 }; 531 532 /* 533 * Header printer 534 * 535 * This printer is used when generating the `include/generated/autoconf.h' file. 536 */ 537 static void 538 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 539 { 540 541 switch (sym->type) { 542 case S_BOOLEAN: 543 case S_TRISTATE: { 544 const char *suffix = ""; 545 546 switch (*value) { 547 case 'n': 548 break; 549 case 'm': 550 suffix = "_MODULE"; 551 /* fall through */ 552 default: 553 fprintf(fp, "#define %s%s%s 1\n", 554 CONFIG_, sym->name, suffix); 555 } 556 break; 557 } 558 case S_HEX: { 559 const char *prefix = ""; 560 561 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X')) 562 prefix = "0x"; 563 fprintf(fp, "#define %s%s %s%s\n", 564 CONFIG_, sym->name, prefix, value); 565 break; 566 } 567 case S_STRING: 568 case S_INT: 569 fprintf(fp, "#define %s%s %s\n", 570 CONFIG_, sym->name, value); 571 break; 572 default: 573 break; 574 } 575 576 } 577 578 static void 579 header_print_comment(FILE *fp, const char *value, void *arg) 580 { 581 const char *p = value; 582 size_t l; 583 584 fprintf(fp, "/*\n"); 585 for (;;) { 586 l = strcspn(p, "\n"); 587 fprintf(fp, " *"); 588 if (l) { 589 fprintf(fp, " "); 590 xfwrite(p, l, 1, fp); 591 p += l; 592 } 593 fprintf(fp, "\n"); 594 if (*p++ == '\0') 595 break; 596 } 597 fprintf(fp, " */\n"); 598 } 599 600 static struct conf_printer header_printer_cb = 601 { 602 .print_symbol = header_print_symbol, 603 .print_comment = header_print_comment, 604 }; 605 606 /* 607 * Tristate printer 608 * 609 * This printer is used when generating the `include/config/tristate.conf' file. 610 */ 611 static void 612 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 613 { 614 615 if (sym->type == S_TRISTATE && *value != 'n') 616 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value)); 617 } 618 619 static struct conf_printer tristate_printer_cb = 620 { 621 .print_symbol = tristate_print_symbol, 622 .print_comment = kconfig_print_comment, 623 }; 624 625 static void conf_write_symbol(FILE *fp, struct symbol *sym, 626 struct conf_printer *printer, void *printer_arg) 627 { 628 const char *str; 629 char *str2; 630 631 switch (sym->type) { 632 case S_OTHER: 633 case S_UNKNOWN: 634 break; 635 case S_STRING: 636 str = sym_get_string_value(sym); 637 str2 = xmalloc(strlen(str) + 3); 638 sprintf(str2, "\"%s\"", str); 639 printer->print_symbol(fp, sym, str2, printer_arg); 640 free((void *)str2); 641 break; 642 default: 643 str = sym_get_string_value(sym); 644 printer->print_symbol(fp, sym, str, printer_arg); 645 } 646 } 647 648 static void 649 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg) 650 { 651 char buf[256]; 652 653 snprintf(buf, sizeof(buf), 654 "\n" 655 "Automatically generated file; DO NOT EDIT.\n" 656 "%s\n", 657 rootmenu.prompt->text); 658 659 printer->print_comment(fp, buf, printer_arg); 660 } 661 662 /* 663 * Write out a minimal config. 664 * All values that has default values are skipped as this is redundant. 665 */ 666 int conf_write_defconfig(const char *filename) 667 { 668 struct symbol *sym; 669 struct menu *menu; 670 FILE *out; 671 672 out = fopen(filename, "w"); 673 if (!out) 674 return 1; 675 676 sym_clear_all_valid(); 677 678 /* Traverse all menus to find all relevant symbols */ 679 menu = rootmenu.list; 680 681 while (menu != NULL) 682 { 683 sym = menu->sym; 684 if (sym == NULL) { 685 if (!menu_is_visible(menu)) 686 goto next_menu; 687 } else if (!sym_is_choice(sym)) { 688 sym_calc_value(sym); 689 if (!(sym->flags & SYMBOL_WRITE)) 690 goto next_menu; 691 sym->flags &= ~SYMBOL_WRITE; 692 /* If we cannot change the symbol - skip */ 693 if (!sym_is_changable(sym)) 694 goto next_menu; 695 /* If symbol equals to default value - skip */ 696 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0) 697 goto next_menu; 698 699 /* 700 * If symbol is a choice value and equals to the 701 * default for a choice - skip. 702 * But only if value is bool and equal to "y" and 703 * choice is not "optional". 704 * (If choice is "optional" then all values can be "n") 705 */ 706 if (sym_is_choice_value(sym)) { 707 struct symbol *cs; 708 struct symbol *ds; 709 710 cs = prop_get_symbol(sym_get_choice_prop(sym)); 711 ds = sym_choice_default(cs); 712 if (!sym_is_optional(cs) && sym == ds) { 713 if ((sym->type == S_BOOLEAN) && 714 sym_get_tristate_value(sym) == yes) 715 goto next_menu; 716 } 717 } 718 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 719 } 720 next_menu: 721 if (menu->list != NULL) { 722 menu = menu->list; 723 } 724 else if (menu->next != NULL) { 725 menu = menu->next; 726 } else { 727 while ((menu = menu->parent)) { 728 if (menu->next != NULL) { 729 menu = menu->next; 730 break; 731 } 732 } 733 } 734 } 735 fclose(out); 736 return 0; 737 } 738 739 int conf_write(const char *name) 740 { 741 FILE *out; 742 struct symbol *sym; 743 struct menu *menu; 744 const char *basename; 745 const char *str; 746 char dirname[PATH_MAX+1], tmpname[PATH_MAX+22], newname[PATH_MAX+8]; 747 char *env; 748 749 dirname[0] = 0; 750 if (name && name[0]) { 751 struct stat st; 752 char *slash; 753 754 if (!stat(name, &st) && S_ISDIR(st.st_mode)) { 755 strcpy(dirname, name); 756 strcat(dirname, "/"); 757 basename = conf_get_configname(); 758 } else if ((slash = strrchr(name, '/'))) { 759 int size = slash - name + 1; 760 memcpy(dirname, name, size); 761 dirname[size] = 0; 762 if (slash[1]) 763 basename = slash + 1; 764 else 765 basename = conf_get_configname(); 766 } else 767 basename = name; 768 } else 769 basename = conf_get_configname(); 770 771 sprintf(newname, "%s%s", dirname, basename); 772 env = getenv("KCONFIG_OVERWRITECONFIG"); 773 if (!env || !*env) { 774 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid()); 775 out = fopen(tmpname, "w"); 776 } else { 777 *tmpname = 0; 778 out = fopen(newname, "w"); 779 } 780 if (!out) 781 return 1; 782 783 conf_write_heading(out, &kconfig_printer_cb, NULL); 784 785 if (!conf_get_changed()) 786 sym_clear_all_valid(); 787 788 menu = rootmenu.list; 789 while (menu) { 790 sym = menu->sym; 791 if (!sym) { 792 if (!menu_is_visible(menu)) 793 goto next; 794 str = menu_get_prompt(menu); 795 fprintf(out, "\n" 796 "#\n" 797 "# %s\n" 798 "#\n", str); 799 } else if (!(sym->flags & SYMBOL_CHOICE)) { 800 sym_calc_value(sym); 801 if (!(sym->flags & SYMBOL_WRITE)) 802 goto next; 803 sym->flags &= ~SYMBOL_WRITE; 804 805 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 806 } 807 808 next: 809 if (menu->list) { 810 menu = menu->list; 811 continue; 812 } 813 if (menu->next) 814 menu = menu->next; 815 else while ((menu = menu->parent)) { 816 if (menu->next) { 817 menu = menu->next; 818 break; 819 } 820 } 821 } 822 fclose(out); 823 824 if (*tmpname) { 825 strcat(dirname, basename); 826 strcat(dirname, ".old"); 827 rename(newname, dirname); 828 if (rename(tmpname, newname)) 829 return 1; 830 } 831 832 conf_message(_("configuration written to %s"), newname); 833 834 sym_set_change_count(0); 835 836 return 0; 837 } 838 839 static int conf_split_config(void) 840 { 841 const char *name; 842 char path[PATH_MAX+1]; 843 char *s, *d, c; 844 struct symbol *sym; 845 struct stat sb; 846 int res, i, fd; 847 848 name = conf_get_autoconfig_name(); 849 conf_read_simple(name, S_DEF_AUTO); 850 sym_calc_value(modules_sym); 851 852 if (chdir("include/config")) 853 return 1; 854 855 res = 0; 856 for_all_symbols(i, sym) { 857 sym_calc_value(sym); 858 if ((sym->flags & SYMBOL_AUTO) || !sym->name) 859 continue; 860 if (sym->flags & SYMBOL_WRITE) { 861 if (sym->flags & SYMBOL_DEF_AUTO) { 862 /* 863 * symbol has old and new value, 864 * so compare them... 865 */ 866 switch (sym->type) { 867 case S_BOOLEAN: 868 case S_TRISTATE: 869 if (sym_get_tristate_value(sym) == 870 sym->def[S_DEF_AUTO].tri) 871 continue; 872 break; 873 case S_STRING: 874 case S_HEX: 875 case S_INT: 876 if (!strcmp(sym_get_string_value(sym), 877 sym->def[S_DEF_AUTO].val)) 878 continue; 879 break; 880 default: 881 break; 882 } 883 } else { 884 /* 885 * If there is no old value, only 'no' (unset) 886 * is allowed as new value. 887 */ 888 switch (sym->type) { 889 case S_BOOLEAN: 890 case S_TRISTATE: 891 if (sym_get_tristate_value(sym) == no) 892 continue; 893 break; 894 default: 895 break; 896 } 897 } 898 } else if (!(sym->flags & SYMBOL_DEF_AUTO)) 899 /* There is neither an old nor a new value. */ 900 continue; 901 /* else 902 * There is an old value, but no new value ('no' (unset) 903 * isn't saved in auto.conf, so the old value is always 904 * different from 'no'). 905 */ 906 907 /* Replace all '_' and append ".h" */ 908 s = sym->name; 909 d = path; 910 while ((c = *s++)) { 911 c = tolower(c); 912 *d++ = (c == '_') ? '/' : c; 913 } 914 strcpy(d, ".h"); 915 916 /* Assume directory path already exists. */ 917 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 918 if (fd == -1) { 919 if (errno != ENOENT) { 920 res = 1; 921 break; 922 } 923 /* 924 * Create directory components, 925 * unless they exist already. 926 */ 927 d = path; 928 while ((d = strchr(d, '/'))) { 929 *d = 0; 930 if (stat(path, &sb) && mkdir(path, 0755)) { 931 res = 1; 932 goto out; 933 } 934 *d++ = '/'; 935 } 936 /* Try it again. */ 937 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 938 if (fd == -1) { 939 res = 1; 940 break; 941 } 942 } 943 close(fd); 944 } 945 out: 946 if (chdir("../..")) 947 return 1; 948 949 return res; 950 } 951 952 int conf_write_autoconf(void) 953 { 954 struct symbol *sym; 955 const char *name; 956 FILE *out, *tristate, *out_h; 957 int i; 958 959 sym_clear_all_valid(); 960 961 file_write_dep("include/config/auto.conf.cmd"); 962 963 if (conf_split_config()) 964 return 1; 965 966 out = fopen(".tmpconfig", "w"); 967 if (!out) 968 return 1; 969 970 tristate = fopen(".tmpconfig_tristate", "w"); 971 if (!tristate) { 972 fclose(out); 973 return 1; 974 } 975 976 out_h = fopen(".tmpconfig.h", "w"); 977 if (!out_h) { 978 fclose(out); 979 fclose(tristate); 980 return 1; 981 } 982 983 conf_write_heading(out, &kconfig_printer_cb, NULL); 984 985 conf_write_heading(tristate, &tristate_printer_cb, NULL); 986 987 conf_write_heading(out_h, &header_printer_cb, NULL); 988 989 for_all_symbols(i, sym) { 990 sym_calc_value(sym); 991 if (!(sym->flags & SYMBOL_WRITE) || !sym->name) 992 continue; 993 994 /* write symbol to auto.conf, tristate and header files */ 995 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1); 996 997 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1); 998 999 conf_write_symbol(out_h, sym, &header_printer_cb, NULL); 1000 } 1001 fclose(out); 1002 fclose(tristate); 1003 fclose(out_h); 1004 1005 name = getenv("KCONFIG_AUTOHEADER"); 1006 if (!name) 1007 name = "include/generated/autoconf.h"; 1008 if (rename(".tmpconfig.h", name)) 1009 return 1; 1010 name = getenv("KCONFIG_TRISTATE"); 1011 if (!name) 1012 name = "include/config/tristate.conf"; 1013 if (rename(".tmpconfig_tristate", name)) 1014 return 1; 1015 name = conf_get_autoconfig_name(); 1016 /* 1017 * This must be the last step, kbuild has a dependency on auto.conf 1018 * and this marks the successful completion of the previous steps. 1019 */ 1020 if (rename(".tmpconfig", name)) 1021 return 1; 1022 1023 return 0; 1024 } 1025 1026 static int sym_change_count; 1027 static void (*conf_changed_callback)(void); 1028 1029 void sym_set_change_count(int count) 1030 { 1031 int _sym_change_count = sym_change_count; 1032 sym_change_count = count; 1033 if (conf_changed_callback && 1034 (bool)_sym_change_count != (bool)count) 1035 conf_changed_callback(); 1036 } 1037 1038 void sym_add_change_count(int count) 1039 { 1040 sym_set_change_count(count + sym_change_count); 1041 } 1042 1043 bool conf_get_changed(void) 1044 { 1045 return sym_change_count; 1046 } 1047 1048 void conf_set_changed_callback(void (*fn)(void)) 1049 { 1050 conf_changed_callback = fn; 1051 } 1052 1053 static bool randomize_choice_values(struct symbol *csym) 1054 { 1055 struct property *prop; 1056 struct symbol *sym; 1057 struct expr *e; 1058 int cnt, def; 1059 1060 /* 1061 * If choice is mod then we may have more items selected 1062 * and if no then no-one. 1063 * In both cases stop. 1064 */ 1065 if (csym->curr.tri != yes) 1066 return false; 1067 1068 prop = sym_get_choice_prop(csym); 1069 1070 /* count entries in choice block */ 1071 cnt = 0; 1072 expr_list_for_each_sym(prop->expr, e, sym) 1073 cnt++; 1074 1075 /* 1076 * find a random value and set it to yes, 1077 * set the rest to no so we have only one set 1078 */ 1079 def = (rand() % cnt); 1080 1081 cnt = 0; 1082 expr_list_for_each_sym(prop->expr, e, sym) { 1083 if (def == cnt++) { 1084 sym->def[S_DEF_USER].tri = yes; 1085 csym->def[S_DEF_USER].val = sym; 1086 } 1087 else { 1088 sym->def[S_DEF_USER].tri = no; 1089 } 1090 sym->flags |= SYMBOL_DEF_USER; 1091 /* clear VALID to get value calculated */ 1092 sym->flags &= ~SYMBOL_VALID; 1093 } 1094 csym->flags |= SYMBOL_DEF_USER; 1095 /* clear VALID to get value calculated */ 1096 csym->flags &= ~(SYMBOL_VALID); 1097 1098 return true; 1099 } 1100 1101 void set_all_choice_values(struct symbol *csym) 1102 { 1103 struct property *prop; 1104 struct symbol *sym; 1105 struct expr *e; 1106 1107 prop = sym_get_choice_prop(csym); 1108 1109 /* 1110 * Set all non-assinged choice values to no 1111 */ 1112 expr_list_for_each_sym(prop->expr, e, sym) { 1113 if (!sym_has_value(sym)) 1114 sym->def[S_DEF_USER].tri = no; 1115 } 1116 csym->flags |= SYMBOL_DEF_USER; 1117 /* clear VALID to get value calculated */ 1118 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES); 1119 } 1120 1121 bool conf_set_all_new_symbols(enum conf_def_mode mode) 1122 { 1123 struct symbol *sym, *csym; 1124 int i, cnt, pby, pty, ptm; /* pby: probability of bool = y 1125 * pty: probability of tristate = y 1126 * ptm: probability of tristate = m 1127 */ 1128 1129 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case 1130 * below, otherwise gcc whines about 1131 * -Wmaybe-uninitialized */ 1132 if (mode == def_random) { 1133 int n, p[3]; 1134 char *env = getenv("KCONFIG_PROBABILITY"); 1135 n = 0; 1136 while( env && *env ) { 1137 char *endp; 1138 int tmp = strtol( env, &endp, 10 ); 1139 if( tmp >= 0 && tmp <= 100 ) { 1140 p[n++] = tmp; 1141 } else { 1142 errno = ERANGE; 1143 perror( "KCONFIG_PROBABILITY" ); 1144 exit( 1 ); 1145 } 1146 env = (*endp == ':') ? endp+1 : endp; 1147 if( n >=3 ) { 1148 break; 1149 } 1150 } 1151 switch( n ) { 1152 case 1: 1153 pby = p[0]; ptm = pby/2; pty = pby-ptm; 1154 break; 1155 case 2: 1156 pty = p[0]; ptm = p[1]; pby = pty + ptm; 1157 break; 1158 case 3: 1159 pby = p[0]; pty = p[1]; ptm = p[2]; 1160 break; 1161 } 1162 1163 if( pty+ptm > 100 ) { 1164 errno = ERANGE; 1165 perror( "KCONFIG_PROBABILITY" ); 1166 exit( 1 ); 1167 } 1168 } 1169 bool has_changed = false; 1170 1171 for_all_symbols(i, sym) { 1172 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID)) 1173 continue; 1174 switch (sym_get_type(sym)) { 1175 case S_BOOLEAN: 1176 case S_TRISTATE: 1177 has_changed = true; 1178 switch (mode) { 1179 case def_yes: 1180 sym->def[S_DEF_USER].tri = yes; 1181 break; 1182 case def_mod: 1183 sym->def[S_DEF_USER].tri = mod; 1184 break; 1185 case def_no: 1186 if (sym->flags & SYMBOL_ALLNOCONFIG_Y) 1187 sym->def[S_DEF_USER].tri = yes; 1188 else 1189 sym->def[S_DEF_USER].tri = no; 1190 break; 1191 case def_random: 1192 sym->def[S_DEF_USER].tri = no; 1193 cnt = rand() % 100; 1194 if (sym->type == S_TRISTATE) { 1195 if (cnt < pty) 1196 sym->def[S_DEF_USER].tri = yes; 1197 else if (cnt < (pty+ptm)) 1198 sym->def[S_DEF_USER].tri = mod; 1199 } else if (cnt < pby) 1200 sym->def[S_DEF_USER].tri = yes; 1201 break; 1202 default: 1203 continue; 1204 } 1205 if (!(sym_is_choice(sym) && mode == def_random)) 1206 sym->flags |= SYMBOL_DEF_USER; 1207 break; 1208 default: 1209 break; 1210 } 1211 1212 } 1213 1214 sym_clear_all_valid(); 1215 1216 /* 1217 * We have different type of choice blocks. 1218 * If curr.tri equals to mod then we can select several 1219 * choice symbols in one block. 1220 * In this case we do nothing. 1221 * If curr.tri equals yes then only one symbol can be 1222 * selected in a choice block and we set it to yes, 1223 * and the rest to no. 1224 */ 1225 if (mode != def_random) { 1226 for_all_symbols(i, csym) { 1227 if ((sym_is_choice(csym) && !sym_has_value(csym)) || 1228 sym_is_choice_value(csym)) 1229 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES; 1230 } 1231 } 1232 1233 for_all_symbols(i, csym) { 1234 if (sym_has_value(csym) || !sym_is_choice(csym)) 1235 continue; 1236 1237 sym_calc_value(csym); 1238 if (mode == def_random) 1239 has_changed = randomize_choice_values(csym); 1240 else { 1241 set_all_choice_values(csym); 1242 has_changed = true; 1243 } 1244 } 1245 1246 return has_changed; 1247 } 1248