1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org> 4 */ 5 6 #include <sys/mman.h> 7 #include <sys/stat.h> 8 #include <ctype.h> 9 #include <errno.h> 10 #include <fcntl.h> 11 #include <limits.h> 12 #include <stdarg.h> 13 #include <stdio.h> 14 #include <stdlib.h> 15 #include <string.h> 16 #include <time.h> 17 #include <unistd.h> 18 19 #include "lkc.h" 20 21 /* return true if 'path' exists, false otherwise */ 22 static bool is_present(const char *path) 23 { 24 struct stat st; 25 26 return !stat(path, &st); 27 } 28 29 /* return true if 'path' exists and it is a directory, false otherwise */ 30 static bool is_dir(const char *path) 31 { 32 struct stat st; 33 34 if (stat(path, &st)) 35 return 0; 36 37 return S_ISDIR(st.st_mode); 38 } 39 40 /* return true if the given two files are the same, false otherwise */ 41 static bool is_same(const char *file1, const char *file2) 42 { 43 int fd1, fd2; 44 struct stat st1, st2; 45 void *map1, *map2; 46 bool ret = false; 47 48 fd1 = open(file1, O_RDONLY); 49 if (fd1 < 0) 50 return ret; 51 52 fd2 = open(file2, O_RDONLY); 53 if (fd2 < 0) 54 goto close1; 55 56 ret = fstat(fd1, &st1); 57 if (ret) 58 goto close2; 59 ret = fstat(fd2, &st2); 60 if (ret) 61 goto close2; 62 63 if (st1.st_size != st2.st_size) 64 goto close2; 65 66 map1 = mmap(NULL, st1.st_size, PROT_READ, MAP_PRIVATE, fd1, 0); 67 if (map1 == MAP_FAILED) 68 goto close2; 69 70 map2 = mmap(NULL, st2.st_size, PROT_READ, MAP_PRIVATE, fd2, 0); 71 if (map2 == MAP_FAILED) 72 goto close2; 73 74 if (bcmp(map1, map2, st1.st_size)) 75 goto close2; 76 77 ret = true; 78 close2: 79 close(fd2); 80 close1: 81 close(fd1); 82 83 return ret; 84 } 85 86 /* 87 * Create the parent directory of the given path. 88 * 89 * For example, if 'include/config/auto.conf' is given, create 'include/config'. 90 */ 91 static int make_parent_dir(const char *path) 92 { 93 char tmp[PATH_MAX + 1]; 94 char *p; 95 96 strncpy(tmp, path, sizeof(tmp)); 97 tmp[sizeof(tmp) - 1] = 0; 98 99 /* Remove the base name. Just return if nothing is left */ 100 p = strrchr(tmp, '/'); 101 if (!p) 102 return 0; 103 *(p + 1) = 0; 104 105 /* Just in case it is an absolute path */ 106 p = tmp; 107 while (*p == '/') 108 p++; 109 110 while ((p = strchr(p, '/'))) { 111 *p = 0; 112 113 /* skip if the directory exists */ 114 if (!is_dir(tmp) && mkdir(tmp, 0755)) 115 return -1; 116 117 *p = '/'; 118 while (*p == '/') 119 p++; 120 } 121 122 return 0; 123 } 124 125 static char depfile_path[PATH_MAX]; 126 static size_t depfile_prefix_len; 127 128 /* touch depfile for symbol 'name' */ 129 static int conf_touch_dep(const char *name) 130 { 131 int fd, ret; 132 const char *s; 133 char *d, c; 134 135 /* check overflow: prefix + name + ".h" + '\0' must fit in buffer. */ 136 if (depfile_prefix_len + strlen(name) + 3 > sizeof(depfile_path)) 137 return -1; 138 139 d = depfile_path + depfile_prefix_len; 140 s = name; 141 142 while ((c = *s++)) 143 *d++ = (c == '_') ? '/' : tolower(c); 144 strcpy(d, ".h"); 145 146 /* Assume directory path already exists. */ 147 fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 148 if (fd == -1) { 149 if (errno != ENOENT) 150 return -1; 151 152 ret = make_parent_dir(depfile_path); 153 if (ret) 154 return ret; 155 156 /* Try it again. */ 157 fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 158 if (fd == -1) 159 return -1; 160 } 161 close(fd); 162 163 return 0; 164 } 165 166 struct conf_printer { 167 void (*print_symbol)(FILE *, struct symbol *, const char *, void *); 168 void (*print_comment)(FILE *, const char *, void *); 169 }; 170 171 static void conf_warning(const char *fmt, ...) 172 __attribute__ ((format (printf, 1, 2))); 173 174 static void conf_message(const char *fmt, ...) 175 __attribute__ ((format (printf, 1, 2))); 176 177 static const char *conf_filename; 178 static int conf_lineno, conf_warnings; 179 180 const char conf_defname[] = "arch/$(ARCH)/defconfig"; 181 182 static void conf_warning(const char *fmt, ...) 183 { 184 va_list ap; 185 va_start(ap, fmt); 186 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno); 187 vfprintf(stderr, fmt, ap); 188 fprintf(stderr, "\n"); 189 va_end(ap); 190 conf_warnings++; 191 } 192 193 static void conf_default_message_callback(const char *s) 194 { 195 printf("#\n# "); 196 printf("%s", s); 197 printf("\n#\n"); 198 } 199 200 static void (*conf_message_callback)(const char *s) = 201 conf_default_message_callback; 202 void conf_set_message_callback(void (*fn)(const char *s)) 203 { 204 conf_message_callback = fn; 205 } 206 207 static void conf_message(const char *fmt, ...) 208 { 209 va_list ap; 210 char buf[4096]; 211 212 if (!conf_message_callback) 213 return; 214 215 va_start(ap, fmt); 216 217 vsnprintf(buf, sizeof(buf), fmt, ap); 218 conf_message_callback(buf); 219 va_end(ap); 220 } 221 222 const char *conf_get_configname(void) 223 { 224 char *name = getenv("KCONFIG_CONFIG"); 225 226 return name ? name : ".config"; 227 } 228 229 static const char *conf_get_autoconfig_name(void) 230 { 231 char *name = getenv("KCONFIG_AUTOCONFIG"); 232 233 return name ? name : "include/config/auto.conf"; 234 } 235 236 char *conf_get_default_confname(void) 237 { 238 static char fullname[PATH_MAX+1]; 239 char *env, *name; 240 241 name = expand_string(conf_defname); 242 env = getenv(SRCTREE); 243 if (env) { 244 snprintf(fullname, sizeof(fullname), "%s/%s", env, name); 245 if (is_present(fullname)) 246 return fullname; 247 } 248 return name; 249 } 250 251 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p) 252 { 253 char *p2; 254 255 switch (sym->type) { 256 case S_TRISTATE: 257 if (p[0] == 'm') { 258 sym->def[def].tri = mod; 259 sym->flags |= def_flags; 260 break; 261 } 262 /* fall through */ 263 case S_BOOLEAN: 264 if (p[0] == 'y') { 265 sym->def[def].tri = yes; 266 sym->flags |= def_flags; 267 break; 268 } 269 if (p[0] == 'n') { 270 sym->def[def].tri = no; 271 sym->flags |= def_flags; 272 break; 273 } 274 if (def != S_DEF_AUTO) 275 conf_warning("symbol value '%s' invalid for %s", 276 p, sym->name); 277 return 1; 278 case S_STRING: 279 if (*p++ != '"') 280 break; 281 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) { 282 if (*p2 == '"') { 283 *p2 = 0; 284 break; 285 } 286 memmove(p2, p2 + 1, strlen(p2)); 287 } 288 if (!p2) { 289 if (def != S_DEF_AUTO) 290 conf_warning("invalid string found"); 291 return 1; 292 } 293 /* fall through */ 294 case S_INT: 295 case S_HEX: 296 if (sym_string_valid(sym, p)) { 297 sym->def[def].val = xstrdup(p); 298 sym->flags |= def_flags; 299 } else { 300 if (def != S_DEF_AUTO) 301 conf_warning("symbol value '%s' invalid for %s", 302 p, sym->name); 303 return 1; 304 } 305 break; 306 default: 307 ; 308 } 309 return 0; 310 } 311 312 #define LINE_GROWTH 16 313 static int add_byte(int c, char **lineptr, size_t slen, size_t *n) 314 { 315 char *nline; 316 size_t new_size = slen + 1; 317 if (new_size > *n) { 318 new_size += LINE_GROWTH - 1; 319 new_size *= 2; 320 nline = xrealloc(*lineptr, new_size); 321 if (!nline) 322 return -1; 323 324 *lineptr = nline; 325 *n = new_size; 326 } 327 328 (*lineptr)[slen] = c; 329 330 return 0; 331 } 332 333 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream) 334 { 335 char *line = *lineptr; 336 size_t slen = 0; 337 338 for (;;) { 339 int c = getc(stream); 340 341 switch (c) { 342 case '\n': 343 if (add_byte(c, &line, slen, n) < 0) 344 goto e_out; 345 slen++; 346 /* fall through */ 347 case EOF: 348 if (add_byte('\0', &line, slen, n) < 0) 349 goto e_out; 350 *lineptr = line; 351 if (slen == 0) 352 return -1; 353 return slen; 354 default: 355 if (add_byte(c, &line, slen, n) < 0) 356 goto e_out; 357 slen++; 358 } 359 } 360 361 e_out: 362 line[slen-1] = '\0'; 363 *lineptr = line; 364 return -1; 365 } 366 367 int conf_read_simple(const char *name, int def) 368 { 369 FILE *in = NULL; 370 char *line = NULL; 371 size_t line_asize = 0; 372 char *p, *p2; 373 struct symbol *sym; 374 int i, def_flags; 375 376 if (name) { 377 in = zconf_fopen(name); 378 } else { 379 struct property *prop; 380 381 name = conf_get_configname(); 382 in = zconf_fopen(name); 383 if (in) 384 goto load; 385 sym_add_change_count(1); 386 if (!sym_defconfig_list) 387 return 1; 388 389 for_all_defaults(sym_defconfig_list, prop) { 390 if (expr_calc_value(prop->visible.expr) == no || 391 prop->expr->type != E_SYMBOL) 392 continue; 393 sym_calc_value(prop->expr->left.sym); 394 name = sym_get_string_value(prop->expr->left.sym); 395 in = zconf_fopen(name); 396 if (in) { 397 conf_message("using defaults found in %s", 398 name); 399 goto load; 400 } 401 } 402 } 403 if (!in) 404 return 1; 405 406 load: 407 conf_filename = name; 408 conf_lineno = 0; 409 conf_warnings = 0; 410 411 def_flags = SYMBOL_DEF << def; 412 for_all_symbols(i, sym) { 413 sym->flags |= SYMBOL_CHANGED; 414 sym->flags &= ~(def_flags|SYMBOL_VALID); 415 if (sym_is_choice(sym)) 416 sym->flags |= def_flags; 417 switch (sym->type) { 418 case S_INT: 419 case S_HEX: 420 case S_STRING: 421 if (sym->def[def].val) 422 free(sym->def[def].val); 423 /* fall through */ 424 default: 425 sym->def[def].val = NULL; 426 sym->def[def].tri = no; 427 } 428 } 429 430 while (compat_getline(&line, &line_asize, in) != -1) { 431 conf_lineno++; 432 sym = NULL; 433 if (line[0] == '#') { 434 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_))) 435 continue; 436 p = strchr(line + 2 + strlen(CONFIG_), ' '); 437 if (!p) 438 continue; 439 *p++ = 0; 440 if (strncmp(p, "is not set", 10)) 441 continue; 442 if (def == S_DEF_USER) { 443 sym = sym_find(line + 2 + strlen(CONFIG_)); 444 if (!sym) { 445 sym_add_change_count(1); 446 continue; 447 } 448 } else { 449 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0); 450 if (sym->type == S_UNKNOWN) 451 sym->type = S_BOOLEAN; 452 } 453 if (sym->flags & def_flags) { 454 conf_warning("override: reassigning to symbol %s", sym->name); 455 } 456 switch (sym->type) { 457 case S_BOOLEAN: 458 case S_TRISTATE: 459 sym->def[def].tri = no; 460 sym->flags |= def_flags; 461 break; 462 default: 463 ; 464 } 465 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) { 466 p = strchr(line + strlen(CONFIG_), '='); 467 if (!p) 468 continue; 469 *p++ = 0; 470 p2 = strchr(p, '\n'); 471 if (p2) { 472 *p2-- = 0; 473 if (*p2 == '\r') 474 *p2 = 0; 475 } 476 477 sym = sym_find(line + strlen(CONFIG_)); 478 if (!sym) { 479 if (def == S_DEF_AUTO) 480 /* 481 * Reading from include/config/auto.conf 482 * If CONFIG_FOO previously existed in 483 * auto.conf but it is missing now, 484 * include/config/foo.h must be touched. 485 */ 486 conf_touch_dep(line + strlen(CONFIG_)); 487 else 488 sym_add_change_count(1); 489 continue; 490 } 491 492 if (sym->flags & def_flags) { 493 conf_warning("override: reassigning to symbol %s", sym->name); 494 } 495 if (conf_set_sym_val(sym, def, def_flags, p)) 496 continue; 497 } else { 498 if (line[0] != '\r' && line[0] != '\n') 499 conf_warning("unexpected data: %.*s", 500 (int)strcspn(line, "\r\n"), line); 501 502 continue; 503 } 504 505 if (sym && sym_is_choice_value(sym)) { 506 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); 507 switch (sym->def[def].tri) { 508 case no: 509 break; 510 case mod: 511 if (cs->def[def].tri == yes) { 512 conf_warning("%s creates inconsistent choice state", sym->name); 513 cs->flags &= ~def_flags; 514 } 515 break; 516 case yes: 517 if (cs->def[def].tri != no) 518 conf_warning("override: %s changes choice state", sym->name); 519 cs->def[def].val = sym; 520 break; 521 } 522 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri); 523 } 524 } 525 free(line); 526 fclose(in); 527 return 0; 528 } 529 530 int conf_read(const char *name) 531 { 532 struct symbol *sym; 533 int conf_unsaved = 0; 534 int i; 535 536 sym_set_change_count(0); 537 538 if (conf_read_simple(name, S_DEF_USER)) { 539 sym_calc_value(modules_sym); 540 return 1; 541 } 542 543 sym_calc_value(modules_sym); 544 545 for_all_symbols(i, sym) { 546 sym_calc_value(sym); 547 if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE)) 548 continue; 549 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { 550 /* check that calculated value agrees with saved value */ 551 switch (sym->type) { 552 case S_BOOLEAN: 553 case S_TRISTATE: 554 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym)) 555 break; 556 if (!sym_is_choice(sym)) 557 continue; 558 /* fall through */ 559 default: 560 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val)) 561 continue; 562 break; 563 } 564 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE)) 565 /* no previous value and not saved */ 566 continue; 567 conf_unsaved++; 568 /* maybe print value in verbose mode... */ 569 } 570 571 for_all_symbols(i, sym) { 572 if (sym_has_value(sym) && !sym_is_choice_value(sym)) { 573 /* Reset values of generates values, so they'll appear 574 * as new, if they should become visible, but that 575 * doesn't quite work if the Kconfig and the saved 576 * configuration disagree. 577 */ 578 if (sym->visible == no && !conf_unsaved) 579 sym->flags &= ~SYMBOL_DEF_USER; 580 switch (sym->type) { 581 case S_STRING: 582 case S_INT: 583 case S_HEX: 584 /* Reset a string value if it's out of range */ 585 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val)) 586 break; 587 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER); 588 conf_unsaved++; 589 break; 590 default: 591 break; 592 } 593 } 594 } 595 596 sym_add_change_count(conf_warnings || conf_unsaved); 597 598 return 0; 599 } 600 601 /* 602 * Kconfig configuration printer 603 * 604 * This printer is used when generating the resulting configuration after 605 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by 606 * passing a non-NULL argument to the printer. 607 * 608 */ 609 static void 610 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 611 { 612 613 switch (sym->type) { 614 case S_BOOLEAN: 615 case S_TRISTATE: 616 if (*value == 'n') { 617 bool skip_unset = (arg != NULL); 618 619 if (!skip_unset) 620 fprintf(fp, "# %s%s is not set\n", 621 CONFIG_, sym->name); 622 return; 623 } 624 break; 625 default: 626 break; 627 } 628 629 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value); 630 } 631 632 static void 633 kconfig_print_comment(FILE *fp, const char *value, void *arg) 634 { 635 const char *p = value; 636 size_t l; 637 638 for (;;) { 639 l = strcspn(p, "\n"); 640 fprintf(fp, "#"); 641 if (l) { 642 fprintf(fp, " "); 643 xfwrite(p, l, 1, fp); 644 p += l; 645 } 646 fprintf(fp, "\n"); 647 if (*p++ == '\0') 648 break; 649 } 650 } 651 652 static struct conf_printer kconfig_printer_cb = 653 { 654 .print_symbol = kconfig_print_symbol, 655 .print_comment = kconfig_print_comment, 656 }; 657 658 /* 659 * Header printer 660 * 661 * This printer is used when generating the `include/generated/autoconf.h' file. 662 */ 663 static void 664 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 665 { 666 667 switch (sym->type) { 668 case S_BOOLEAN: 669 case S_TRISTATE: { 670 const char *suffix = ""; 671 672 switch (*value) { 673 case 'n': 674 break; 675 case 'm': 676 suffix = "_MODULE"; 677 /* fall through */ 678 default: 679 fprintf(fp, "#define %s%s%s 1\n", 680 CONFIG_, sym->name, suffix); 681 } 682 break; 683 } 684 case S_HEX: { 685 const char *prefix = ""; 686 687 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X')) 688 prefix = "0x"; 689 fprintf(fp, "#define %s%s %s%s\n", 690 CONFIG_, sym->name, prefix, value); 691 break; 692 } 693 case S_STRING: 694 case S_INT: 695 fprintf(fp, "#define %s%s %s\n", 696 CONFIG_, sym->name, value); 697 break; 698 default: 699 break; 700 } 701 702 } 703 704 static void 705 header_print_comment(FILE *fp, const char *value, void *arg) 706 { 707 const char *p = value; 708 size_t l; 709 710 fprintf(fp, "/*\n"); 711 for (;;) { 712 l = strcspn(p, "\n"); 713 fprintf(fp, " *"); 714 if (l) { 715 fprintf(fp, " "); 716 xfwrite(p, l, 1, fp); 717 p += l; 718 } 719 fprintf(fp, "\n"); 720 if (*p++ == '\0') 721 break; 722 } 723 fprintf(fp, " */\n"); 724 } 725 726 static struct conf_printer header_printer_cb = 727 { 728 .print_symbol = header_print_symbol, 729 .print_comment = header_print_comment, 730 }; 731 732 /* 733 * Tristate printer 734 * 735 * This printer is used when generating the `include/config/tristate.conf' file. 736 */ 737 static void 738 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 739 { 740 741 if (sym->type == S_TRISTATE && *value != 'n') 742 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value)); 743 } 744 745 static struct conf_printer tristate_printer_cb = 746 { 747 .print_symbol = tristate_print_symbol, 748 .print_comment = kconfig_print_comment, 749 }; 750 751 static void conf_write_symbol(FILE *fp, struct symbol *sym, 752 struct conf_printer *printer, void *printer_arg) 753 { 754 const char *str; 755 756 switch (sym->type) { 757 case S_UNKNOWN: 758 break; 759 case S_STRING: 760 str = sym_get_string_value(sym); 761 str = sym_escape_string_value(str); 762 printer->print_symbol(fp, sym, str, printer_arg); 763 free((void *)str); 764 break; 765 default: 766 str = sym_get_string_value(sym); 767 printer->print_symbol(fp, sym, str, printer_arg); 768 } 769 } 770 771 static void 772 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg) 773 { 774 char buf[256]; 775 776 snprintf(buf, sizeof(buf), 777 "\n" 778 "Automatically generated file; DO NOT EDIT.\n" 779 "%s\n", 780 rootmenu.prompt->text); 781 782 printer->print_comment(fp, buf, printer_arg); 783 } 784 785 /* 786 * Write out a minimal config. 787 * All values that has default values are skipped as this is redundant. 788 */ 789 int conf_write_defconfig(const char *filename) 790 { 791 struct symbol *sym; 792 struct menu *menu; 793 FILE *out; 794 795 out = fopen(filename, "w"); 796 if (!out) 797 return 1; 798 799 sym_clear_all_valid(); 800 801 /* Traverse all menus to find all relevant symbols */ 802 menu = rootmenu.list; 803 804 while (menu != NULL) 805 { 806 sym = menu->sym; 807 if (sym == NULL) { 808 if (!menu_is_visible(menu)) 809 goto next_menu; 810 } else if (!sym_is_choice(sym)) { 811 sym_calc_value(sym); 812 if (!(sym->flags & SYMBOL_WRITE)) 813 goto next_menu; 814 sym->flags &= ~SYMBOL_WRITE; 815 /* If we cannot change the symbol - skip */ 816 if (!sym_is_changable(sym)) 817 goto next_menu; 818 /* If symbol equals to default value - skip */ 819 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0) 820 goto next_menu; 821 822 /* 823 * If symbol is a choice value and equals to the 824 * default for a choice - skip. 825 * But only if value is bool and equal to "y" and 826 * choice is not "optional". 827 * (If choice is "optional" then all values can be "n") 828 */ 829 if (sym_is_choice_value(sym)) { 830 struct symbol *cs; 831 struct symbol *ds; 832 833 cs = prop_get_symbol(sym_get_choice_prop(sym)); 834 ds = sym_choice_default(cs); 835 if (!sym_is_optional(cs) && sym == ds) { 836 if ((sym->type == S_BOOLEAN) && 837 sym_get_tristate_value(sym) == yes) 838 goto next_menu; 839 } 840 } 841 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 842 } 843 next_menu: 844 if (menu->list != NULL) { 845 menu = menu->list; 846 } 847 else if (menu->next != NULL) { 848 menu = menu->next; 849 } else { 850 while ((menu = menu->parent)) { 851 if (menu->next != NULL) { 852 menu = menu->next; 853 break; 854 } 855 } 856 } 857 } 858 fclose(out); 859 return 0; 860 } 861 862 int conf_write(const char *name) 863 { 864 FILE *out; 865 struct symbol *sym; 866 struct menu *menu; 867 const char *str; 868 char tmpname[PATH_MAX + 1], oldname[PATH_MAX + 1]; 869 char *env; 870 871 if (!name) 872 name = conf_get_configname(); 873 874 if (!*name) { 875 fprintf(stderr, "config name is empty\n"); 876 return -1; 877 } 878 879 if (is_dir(name)) { 880 fprintf(stderr, "%s: Is a directory\n", name); 881 return -1; 882 } 883 884 if (make_parent_dir(name)) 885 return -1; 886 887 env = getenv("KCONFIG_OVERWRITECONFIG"); 888 if (env && *env) { 889 *tmpname = 0; 890 out = fopen(name, "w"); 891 } else { 892 snprintf(tmpname, sizeof(tmpname), "%s.%d.tmp", 893 name, (int)getpid()); 894 out = fopen(tmpname, "w"); 895 } 896 if (!out) 897 return 1; 898 899 conf_write_heading(out, &kconfig_printer_cb, NULL); 900 901 if (!conf_get_changed()) 902 sym_clear_all_valid(); 903 904 menu = rootmenu.list; 905 while (menu) { 906 sym = menu->sym; 907 if (!sym) { 908 if (!menu_is_visible(menu)) 909 goto next; 910 str = menu_get_prompt(menu); 911 fprintf(out, "\n" 912 "#\n" 913 "# %s\n" 914 "#\n", str); 915 } else if (!(sym->flags & SYMBOL_CHOICE)) { 916 sym_calc_value(sym); 917 if (!(sym->flags & SYMBOL_WRITE)) 918 goto next; 919 sym->flags &= ~SYMBOL_WRITE; 920 921 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 922 } 923 924 next: 925 if (menu->list) { 926 menu = menu->list; 927 continue; 928 } 929 if (menu->next) 930 menu = menu->next; 931 else while ((menu = menu->parent)) { 932 if (menu->next) { 933 menu = menu->next; 934 break; 935 } 936 } 937 } 938 fclose(out); 939 940 if (*tmpname) { 941 if (is_same(name, tmpname)) { 942 conf_message("No change to %s", name); 943 unlink(tmpname); 944 sym_set_change_count(0); 945 return 0; 946 } 947 948 snprintf(oldname, sizeof(oldname), "%s.old", name); 949 rename(name, oldname); 950 if (rename(tmpname, name)) 951 return 1; 952 } 953 954 conf_message("configuration written to %s", name); 955 956 sym_set_change_count(0); 957 958 return 0; 959 } 960 961 /* write a dependency file as used by kbuild to track dependencies */ 962 static int conf_write_dep(const char *name) 963 { 964 struct file *file; 965 FILE *out; 966 967 out = fopen("..config.tmp", "w"); 968 if (!out) 969 return 1; 970 fprintf(out, "deps_config := \\\n"); 971 for (file = file_list; file; file = file->next) { 972 if (file->next) 973 fprintf(out, "\t%s \\\n", file->name); 974 else 975 fprintf(out, "\t%s\n", file->name); 976 } 977 fprintf(out, "\n%s: \\\n" 978 "\t$(deps_config)\n\n", conf_get_autoconfig_name()); 979 980 env_write_dep(out, conf_get_autoconfig_name()); 981 982 fprintf(out, "\n$(deps_config): ;\n"); 983 fclose(out); 984 985 if (make_parent_dir(name)) 986 return 1; 987 rename("..config.tmp", name); 988 return 0; 989 } 990 991 static int conf_touch_deps(void) 992 { 993 const char *name; 994 struct symbol *sym; 995 int res, i; 996 997 strcpy(depfile_path, "include/config/"); 998 depfile_prefix_len = strlen(depfile_path); 999 1000 name = conf_get_autoconfig_name(); 1001 conf_read_simple(name, S_DEF_AUTO); 1002 sym_calc_value(modules_sym); 1003 1004 for_all_symbols(i, sym) { 1005 sym_calc_value(sym); 1006 if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name) 1007 continue; 1008 if (sym->flags & SYMBOL_WRITE) { 1009 if (sym->flags & SYMBOL_DEF_AUTO) { 1010 /* 1011 * symbol has old and new value, 1012 * so compare them... 1013 */ 1014 switch (sym->type) { 1015 case S_BOOLEAN: 1016 case S_TRISTATE: 1017 if (sym_get_tristate_value(sym) == 1018 sym->def[S_DEF_AUTO].tri) 1019 continue; 1020 break; 1021 case S_STRING: 1022 case S_HEX: 1023 case S_INT: 1024 if (!strcmp(sym_get_string_value(sym), 1025 sym->def[S_DEF_AUTO].val)) 1026 continue; 1027 break; 1028 default: 1029 break; 1030 } 1031 } else { 1032 /* 1033 * If there is no old value, only 'no' (unset) 1034 * is allowed as new value. 1035 */ 1036 switch (sym->type) { 1037 case S_BOOLEAN: 1038 case S_TRISTATE: 1039 if (sym_get_tristate_value(sym) == no) 1040 continue; 1041 break; 1042 default: 1043 break; 1044 } 1045 } 1046 } else if (!(sym->flags & SYMBOL_DEF_AUTO)) 1047 /* There is neither an old nor a new value. */ 1048 continue; 1049 /* else 1050 * There is an old value, but no new value ('no' (unset) 1051 * isn't saved in auto.conf, so the old value is always 1052 * different from 'no'). 1053 */ 1054 1055 res = conf_touch_dep(sym->name); 1056 if (res) 1057 return res; 1058 } 1059 1060 return 0; 1061 } 1062 1063 int conf_write_autoconf(int overwrite) 1064 { 1065 struct symbol *sym; 1066 const char *name; 1067 const char *autoconf_name = conf_get_autoconfig_name(); 1068 FILE *out, *tristate, *out_h; 1069 int i; 1070 1071 if (!overwrite && is_present(autoconf_name)) 1072 return 0; 1073 1074 sym_clear_all_valid(); 1075 1076 conf_write_dep("include/config/auto.conf.cmd"); 1077 1078 if (conf_touch_deps()) 1079 return 1; 1080 1081 out = fopen(".tmpconfig", "w"); 1082 if (!out) 1083 return 1; 1084 1085 tristate = fopen(".tmpconfig_tristate", "w"); 1086 if (!tristate) { 1087 fclose(out); 1088 return 1; 1089 } 1090 1091 out_h = fopen(".tmpconfig.h", "w"); 1092 if (!out_h) { 1093 fclose(out); 1094 fclose(tristate); 1095 return 1; 1096 } 1097 1098 conf_write_heading(out, &kconfig_printer_cb, NULL); 1099 1100 conf_write_heading(tristate, &tristate_printer_cb, NULL); 1101 1102 conf_write_heading(out_h, &header_printer_cb, NULL); 1103 1104 for_all_symbols(i, sym) { 1105 sym_calc_value(sym); 1106 if (!(sym->flags & SYMBOL_WRITE) || !sym->name) 1107 continue; 1108 1109 /* write symbol to auto.conf, tristate and header files */ 1110 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1); 1111 1112 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1); 1113 1114 conf_write_symbol(out_h, sym, &header_printer_cb, NULL); 1115 } 1116 fclose(out); 1117 fclose(tristate); 1118 fclose(out_h); 1119 1120 name = getenv("KCONFIG_AUTOHEADER"); 1121 if (!name) 1122 name = "include/generated/autoconf.h"; 1123 if (make_parent_dir(name)) 1124 return 1; 1125 if (rename(".tmpconfig.h", name)) 1126 return 1; 1127 1128 name = getenv("KCONFIG_TRISTATE"); 1129 if (!name) 1130 name = "include/config/tristate.conf"; 1131 if (make_parent_dir(name)) 1132 return 1; 1133 if (rename(".tmpconfig_tristate", name)) 1134 return 1; 1135 1136 if (make_parent_dir(autoconf_name)) 1137 return 1; 1138 /* 1139 * This must be the last step, kbuild has a dependency on auto.conf 1140 * and this marks the successful completion of the previous steps. 1141 */ 1142 if (rename(".tmpconfig", autoconf_name)) 1143 return 1; 1144 1145 return 0; 1146 } 1147 1148 static int sym_change_count; 1149 static void (*conf_changed_callback)(void); 1150 1151 void sym_set_change_count(int count) 1152 { 1153 int _sym_change_count = sym_change_count; 1154 sym_change_count = count; 1155 if (conf_changed_callback && 1156 (bool)_sym_change_count != (bool)count) 1157 conf_changed_callback(); 1158 } 1159 1160 void sym_add_change_count(int count) 1161 { 1162 sym_set_change_count(count + sym_change_count); 1163 } 1164 1165 bool conf_get_changed(void) 1166 { 1167 return sym_change_count; 1168 } 1169 1170 void conf_set_changed_callback(void (*fn)(void)) 1171 { 1172 conf_changed_callback = fn; 1173 } 1174 1175 static bool randomize_choice_values(struct symbol *csym) 1176 { 1177 struct property *prop; 1178 struct symbol *sym; 1179 struct expr *e; 1180 int cnt, def; 1181 1182 /* 1183 * If choice is mod then we may have more items selected 1184 * and if no then no-one. 1185 * In both cases stop. 1186 */ 1187 if (csym->curr.tri != yes) 1188 return false; 1189 1190 prop = sym_get_choice_prop(csym); 1191 1192 /* count entries in choice block */ 1193 cnt = 0; 1194 expr_list_for_each_sym(prop->expr, e, sym) 1195 cnt++; 1196 1197 /* 1198 * find a random value and set it to yes, 1199 * set the rest to no so we have only one set 1200 */ 1201 def = (rand() % cnt); 1202 1203 cnt = 0; 1204 expr_list_for_each_sym(prop->expr, e, sym) { 1205 if (def == cnt++) { 1206 sym->def[S_DEF_USER].tri = yes; 1207 csym->def[S_DEF_USER].val = sym; 1208 } 1209 else { 1210 sym->def[S_DEF_USER].tri = no; 1211 } 1212 sym->flags |= SYMBOL_DEF_USER; 1213 /* clear VALID to get value calculated */ 1214 sym->flags &= ~SYMBOL_VALID; 1215 } 1216 csym->flags |= SYMBOL_DEF_USER; 1217 /* clear VALID to get value calculated */ 1218 csym->flags &= ~(SYMBOL_VALID); 1219 1220 return true; 1221 } 1222 1223 void set_all_choice_values(struct symbol *csym) 1224 { 1225 struct property *prop; 1226 struct symbol *sym; 1227 struct expr *e; 1228 1229 prop = sym_get_choice_prop(csym); 1230 1231 /* 1232 * Set all non-assinged choice values to no 1233 */ 1234 expr_list_for_each_sym(prop->expr, e, sym) { 1235 if (!sym_has_value(sym)) 1236 sym->def[S_DEF_USER].tri = no; 1237 } 1238 csym->flags |= SYMBOL_DEF_USER; 1239 /* clear VALID to get value calculated */ 1240 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES); 1241 } 1242 1243 bool conf_set_all_new_symbols(enum conf_def_mode mode) 1244 { 1245 struct symbol *sym, *csym; 1246 int i, cnt, pby, pty, ptm; /* pby: probability of bool = y 1247 * pty: probability of tristate = y 1248 * ptm: probability of tristate = m 1249 */ 1250 1251 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case 1252 * below, otherwise gcc whines about 1253 * -Wmaybe-uninitialized */ 1254 if (mode == def_random) { 1255 int n, p[3]; 1256 char *env = getenv("KCONFIG_PROBABILITY"); 1257 n = 0; 1258 while( env && *env ) { 1259 char *endp; 1260 int tmp = strtol( env, &endp, 10 ); 1261 if( tmp >= 0 && tmp <= 100 ) { 1262 p[n++] = tmp; 1263 } else { 1264 errno = ERANGE; 1265 perror( "KCONFIG_PROBABILITY" ); 1266 exit( 1 ); 1267 } 1268 env = (*endp == ':') ? endp+1 : endp; 1269 if( n >=3 ) { 1270 break; 1271 } 1272 } 1273 switch( n ) { 1274 case 1: 1275 pby = p[0]; ptm = pby/2; pty = pby-ptm; 1276 break; 1277 case 2: 1278 pty = p[0]; ptm = p[1]; pby = pty + ptm; 1279 break; 1280 case 3: 1281 pby = p[0]; pty = p[1]; ptm = p[2]; 1282 break; 1283 } 1284 1285 if( pty+ptm > 100 ) { 1286 errno = ERANGE; 1287 perror( "KCONFIG_PROBABILITY" ); 1288 exit( 1 ); 1289 } 1290 } 1291 bool has_changed = false; 1292 1293 for_all_symbols(i, sym) { 1294 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID)) 1295 continue; 1296 switch (sym_get_type(sym)) { 1297 case S_BOOLEAN: 1298 case S_TRISTATE: 1299 has_changed = true; 1300 switch (mode) { 1301 case def_yes: 1302 sym->def[S_DEF_USER].tri = yes; 1303 break; 1304 case def_mod: 1305 sym->def[S_DEF_USER].tri = mod; 1306 break; 1307 case def_no: 1308 if (sym->flags & SYMBOL_ALLNOCONFIG_Y) 1309 sym->def[S_DEF_USER].tri = yes; 1310 else 1311 sym->def[S_DEF_USER].tri = no; 1312 break; 1313 case def_random: 1314 sym->def[S_DEF_USER].tri = no; 1315 cnt = rand() % 100; 1316 if (sym->type == S_TRISTATE) { 1317 if (cnt < pty) 1318 sym->def[S_DEF_USER].tri = yes; 1319 else if (cnt < (pty+ptm)) 1320 sym->def[S_DEF_USER].tri = mod; 1321 } else if (cnt < pby) 1322 sym->def[S_DEF_USER].tri = yes; 1323 break; 1324 default: 1325 continue; 1326 } 1327 if (!(sym_is_choice(sym) && mode == def_random)) 1328 sym->flags |= SYMBOL_DEF_USER; 1329 break; 1330 default: 1331 break; 1332 } 1333 1334 } 1335 1336 sym_clear_all_valid(); 1337 1338 /* 1339 * We have different type of choice blocks. 1340 * If curr.tri equals to mod then we can select several 1341 * choice symbols in one block. 1342 * In this case we do nothing. 1343 * If curr.tri equals yes then only one symbol can be 1344 * selected in a choice block and we set it to yes, 1345 * and the rest to no. 1346 */ 1347 if (mode != def_random) { 1348 for_all_symbols(i, csym) { 1349 if ((sym_is_choice(csym) && !sym_has_value(csym)) || 1350 sym_is_choice_value(csym)) 1351 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES; 1352 } 1353 } 1354 1355 for_all_symbols(i, csym) { 1356 if (sym_has_value(csym) || !sym_is_choice(csym)) 1357 continue; 1358 1359 sym_calc_value(csym); 1360 if (mode == def_random) 1361 has_changed = randomize_choice_values(csym); 1362 else { 1363 set_all_choice_values(csym); 1364 has_changed = true; 1365 } 1366 } 1367 1368 return has_changed; 1369 } 1370