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 <sys/types.h> 9 #include <ctype.h> 10 #include <errno.h> 11 #include <fcntl.h> 12 #include <limits.h> 13 #include <stdarg.h> 14 #include <stdio.h> 15 #include <stdlib.h> 16 #include <string.h> 17 #include <time.h> 18 #include <unistd.h> 19 20 #include "lkc.h" 21 22 /* return true if 'path' exists, false otherwise */ 23 static bool is_present(const char *path) 24 { 25 struct stat st; 26 27 return !stat(path, &st); 28 } 29 30 /* return true if 'path' exists and it is a directory, false otherwise */ 31 static bool is_dir(const char *path) 32 { 33 struct stat st; 34 35 if (stat(path, &st)) 36 return 0; 37 38 return S_ISDIR(st.st_mode); 39 } 40 41 /* return true if the given two files are the same, false otherwise */ 42 static bool is_same(const char *file1, const char *file2) 43 { 44 int fd1, fd2; 45 struct stat st1, st2; 46 void *map1, *map2; 47 bool ret = false; 48 49 fd1 = open(file1, O_RDONLY); 50 if (fd1 < 0) 51 return ret; 52 53 fd2 = open(file2, O_RDONLY); 54 if (fd2 < 0) 55 goto close1; 56 57 ret = fstat(fd1, &st1); 58 if (ret) 59 goto close2; 60 ret = fstat(fd2, &st2); 61 if (ret) 62 goto close2; 63 64 if (st1.st_size != st2.st_size) 65 goto close2; 66 67 map1 = mmap(NULL, st1.st_size, PROT_READ, MAP_PRIVATE, fd1, 0); 68 if (map1 == MAP_FAILED) 69 goto close2; 70 71 map2 = mmap(NULL, st2.st_size, PROT_READ, MAP_PRIVATE, fd2, 0); 72 if (map2 == MAP_FAILED) 73 goto close2; 74 75 if (bcmp(map1, map2, st1.st_size)) 76 goto close2; 77 78 ret = true; 79 close2: 80 close(fd2); 81 close1: 82 close(fd1); 83 84 return ret; 85 } 86 87 /* 88 * Create the parent directory of the given path. 89 * 90 * For example, if 'include/config/auto.conf' is given, create 'include/config'. 91 */ 92 static int make_parent_dir(const char *path) 93 { 94 char tmp[PATH_MAX + 1]; 95 char *p; 96 97 strncpy(tmp, path, sizeof(tmp)); 98 tmp[sizeof(tmp) - 1] = 0; 99 100 /* Remove the base name. Just return if nothing is left */ 101 p = strrchr(tmp, '/'); 102 if (!p) 103 return 0; 104 *(p + 1) = 0; 105 106 /* Just in case it is an absolute path */ 107 p = tmp; 108 while (*p == '/') 109 p++; 110 111 while ((p = strchr(p, '/'))) { 112 *p = 0; 113 114 /* skip if the directory exists */ 115 if (!is_dir(tmp) && mkdir(tmp, 0755)) 116 return -1; 117 118 *p = '/'; 119 while (*p == '/') 120 p++; 121 } 122 123 return 0; 124 } 125 126 static char depfile_path[PATH_MAX]; 127 static size_t depfile_prefix_len; 128 129 /* touch depfile for symbol 'name' */ 130 static int conf_touch_dep(const char *name) 131 { 132 int fd, ret; 133 char *d; 134 135 /* check overflow: prefix + name + '\0' must fit in buffer. */ 136 if (depfile_prefix_len + strlen(name) + 1 > sizeof(depfile_path)) 137 return -1; 138 139 d = depfile_path + depfile_prefix_len; 140 strcpy(d, name); 141 142 /* Assume directory path already exists. */ 143 fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 144 if (fd == -1) { 145 if (errno != ENOENT) 146 return -1; 147 148 ret = make_parent_dir(depfile_path); 149 if (ret) 150 return ret; 151 152 /* Try it again. */ 153 fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); 154 if (fd == -1) 155 return -1; 156 } 157 close(fd); 158 159 return 0; 160 } 161 162 struct conf_printer { 163 void (*print_symbol)(FILE *, struct symbol *, const char *, void *); 164 void (*print_comment)(FILE *, const char *, void *); 165 }; 166 167 static void conf_warning(const char *fmt, ...) 168 __attribute__ ((format (printf, 1, 2))); 169 170 static void conf_message(const char *fmt, ...) 171 __attribute__ ((format (printf, 1, 2))); 172 173 static const char *conf_filename; 174 static int conf_lineno, conf_warnings; 175 176 static void conf_warning(const char *fmt, ...) 177 { 178 va_list ap; 179 va_start(ap, fmt); 180 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno); 181 vfprintf(stderr, fmt, ap); 182 fprintf(stderr, "\n"); 183 va_end(ap); 184 conf_warnings++; 185 } 186 187 static void conf_default_message_callback(const char *s) 188 { 189 printf("#\n# "); 190 printf("%s", s); 191 printf("\n#\n"); 192 } 193 194 static void (*conf_message_callback)(const char *s) = 195 conf_default_message_callback; 196 void conf_set_message_callback(void (*fn)(const char *s)) 197 { 198 conf_message_callback = fn; 199 } 200 201 static void conf_message(const char *fmt, ...) 202 { 203 va_list ap; 204 char buf[4096]; 205 206 if (!conf_message_callback) 207 return; 208 209 va_start(ap, fmt); 210 211 vsnprintf(buf, sizeof(buf), fmt, ap); 212 conf_message_callback(buf); 213 va_end(ap); 214 } 215 216 const char *conf_get_configname(void) 217 { 218 char *name = getenv("KCONFIG_CONFIG"); 219 220 return name ? name : ".config"; 221 } 222 223 static const char *conf_get_autoconfig_name(void) 224 { 225 char *name = getenv("KCONFIG_AUTOCONFIG"); 226 227 return name ? name : "include/config/auto.conf"; 228 } 229 230 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p) 231 { 232 char *p2; 233 234 switch (sym->type) { 235 case S_TRISTATE: 236 if (p[0] == 'm') { 237 sym->def[def].tri = mod; 238 sym->flags |= def_flags; 239 break; 240 } 241 /* fall through */ 242 case S_BOOLEAN: 243 if (p[0] == 'y') { 244 sym->def[def].tri = yes; 245 sym->flags |= def_flags; 246 break; 247 } 248 if (p[0] == 'n') { 249 sym->def[def].tri = no; 250 sym->flags |= def_flags; 251 break; 252 } 253 if (def != S_DEF_AUTO) 254 conf_warning("symbol value '%s' invalid for %s", 255 p, sym->name); 256 return 1; 257 case S_STRING: 258 if (*p++ != '"') 259 break; 260 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) { 261 if (*p2 == '"') { 262 *p2 = 0; 263 break; 264 } 265 memmove(p2, p2 + 1, strlen(p2)); 266 } 267 if (!p2) { 268 if (def != S_DEF_AUTO) 269 conf_warning("invalid string found"); 270 return 1; 271 } 272 /* fall through */ 273 case S_INT: 274 case S_HEX: 275 if (sym_string_valid(sym, p)) { 276 sym->def[def].val = xstrdup(p); 277 sym->flags |= def_flags; 278 } else { 279 if (def != S_DEF_AUTO) 280 conf_warning("symbol value '%s' invalid for %s", 281 p, sym->name); 282 return 1; 283 } 284 break; 285 default: 286 ; 287 } 288 return 0; 289 } 290 291 #define LINE_GROWTH 16 292 static int add_byte(int c, char **lineptr, size_t slen, size_t *n) 293 { 294 char *nline; 295 size_t new_size = slen + 1; 296 if (new_size > *n) { 297 new_size += LINE_GROWTH - 1; 298 new_size *= 2; 299 nline = xrealloc(*lineptr, new_size); 300 if (!nline) 301 return -1; 302 303 *lineptr = nline; 304 *n = new_size; 305 } 306 307 (*lineptr)[slen] = c; 308 309 return 0; 310 } 311 312 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream) 313 { 314 char *line = *lineptr; 315 size_t slen = 0; 316 317 for (;;) { 318 int c = getc(stream); 319 320 switch (c) { 321 case '\n': 322 if (add_byte(c, &line, slen, n) < 0) 323 goto e_out; 324 slen++; 325 /* fall through */ 326 case EOF: 327 if (add_byte('\0', &line, slen, n) < 0) 328 goto e_out; 329 *lineptr = line; 330 if (slen == 0) 331 return -1; 332 return slen; 333 default: 334 if (add_byte(c, &line, slen, n) < 0) 335 goto e_out; 336 slen++; 337 } 338 } 339 340 e_out: 341 line[slen-1] = '\0'; 342 *lineptr = line; 343 return -1; 344 } 345 346 int conf_read_simple(const char *name, int def) 347 { 348 FILE *in = NULL; 349 char *line = NULL; 350 size_t line_asize = 0; 351 char *p, *p2; 352 struct symbol *sym; 353 int i, def_flags; 354 355 if (name) { 356 in = zconf_fopen(name); 357 } else { 358 struct property *prop; 359 360 name = conf_get_configname(); 361 in = zconf_fopen(name); 362 if (in) 363 goto load; 364 sym_add_change_count(1); 365 if (!sym_defconfig_list) 366 return 1; 367 368 for_all_defaults(sym_defconfig_list, prop) { 369 if (expr_calc_value(prop->visible.expr) == no || 370 prop->expr->type != E_SYMBOL) 371 continue; 372 sym_calc_value(prop->expr->left.sym); 373 name = sym_get_string_value(prop->expr->left.sym); 374 in = zconf_fopen(name); 375 if (in) { 376 conf_message("using defaults found in %s", 377 name); 378 goto load; 379 } 380 } 381 } 382 if (!in) 383 return 1; 384 385 load: 386 conf_filename = name; 387 conf_lineno = 0; 388 conf_warnings = 0; 389 390 def_flags = SYMBOL_DEF << def; 391 for_all_symbols(i, sym) { 392 sym->flags |= SYMBOL_CHANGED; 393 sym->flags &= ~(def_flags|SYMBOL_VALID); 394 if (sym_is_choice(sym)) 395 sym->flags |= def_flags; 396 switch (sym->type) { 397 case S_INT: 398 case S_HEX: 399 case S_STRING: 400 if (sym->def[def].val) 401 free(sym->def[def].val); 402 /* fall through */ 403 default: 404 sym->def[def].val = NULL; 405 sym->def[def].tri = no; 406 } 407 } 408 409 while (compat_getline(&line, &line_asize, in) != -1) { 410 conf_lineno++; 411 sym = NULL; 412 if (line[0] == '#') { 413 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_))) 414 continue; 415 p = strchr(line + 2 + strlen(CONFIG_), ' '); 416 if (!p) 417 continue; 418 *p++ = 0; 419 if (strncmp(p, "is not set", 10)) 420 continue; 421 if (def == S_DEF_USER) { 422 sym = sym_find(line + 2 + strlen(CONFIG_)); 423 if (!sym) { 424 sym_add_change_count(1); 425 continue; 426 } 427 } else { 428 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0); 429 if (sym->type == S_UNKNOWN) 430 sym->type = S_BOOLEAN; 431 } 432 if (sym->flags & def_flags) { 433 conf_warning("override: reassigning to symbol %s", sym->name); 434 } 435 switch (sym->type) { 436 case S_BOOLEAN: 437 case S_TRISTATE: 438 sym->def[def].tri = no; 439 sym->flags |= def_flags; 440 break; 441 default: 442 ; 443 } 444 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) { 445 p = strchr(line + strlen(CONFIG_), '='); 446 if (!p) 447 continue; 448 *p++ = 0; 449 p2 = strchr(p, '\n'); 450 if (p2) { 451 *p2-- = 0; 452 if (*p2 == '\r') 453 *p2 = 0; 454 } 455 456 sym = sym_find(line + strlen(CONFIG_)); 457 if (!sym) { 458 if (def == S_DEF_AUTO) 459 /* 460 * Reading from include/config/auto.conf 461 * If CONFIG_FOO previously existed in 462 * auto.conf but it is missing now, 463 * include/config/FOO must be touched. 464 */ 465 conf_touch_dep(line + strlen(CONFIG_)); 466 else 467 sym_add_change_count(1); 468 continue; 469 } 470 471 if (sym->flags & def_flags) { 472 conf_warning("override: reassigning to symbol %s", sym->name); 473 } 474 if (conf_set_sym_val(sym, def, def_flags, p)) 475 continue; 476 } else { 477 if (line[0] != '\r' && line[0] != '\n') 478 conf_warning("unexpected data: %.*s", 479 (int)strcspn(line, "\r\n"), line); 480 481 continue; 482 } 483 484 if (sym && sym_is_choice_value(sym)) { 485 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); 486 switch (sym->def[def].tri) { 487 case no: 488 break; 489 case mod: 490 if (cs->def[def].tri == yes) { 491 conf_warning("%s creates inconsistent choice state", sym->name); 492 cs->flags &= ~def_flags; 493 } 494 break; 495 case yes: 496 if (cs->def[def].tri != no) 497 conf_warning("override: %s changes choice state", sym->name); 498 cs->def[def].val = sym; 499 break; 500 } 501 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri); 502 } 503 } 504 free(line); 505 fclose(in); 506 return 0; 507 } 508 509 int conf_read(const char *name) 510 { 511 struct symbol *sym; 512 int conf_unsaved = 0; 513 int i; 514 515 sym_set_change_count(0); 516 517 if (conf_read_simple(name, S_DEF_USER)) { 518 sym_calc_value(modules_sym); 519 return 1; 520 } 521 522 sym_calc_value(modules_sym); 523 524 for_all_symbols(i, sym) { 525 sym_calc_value(sym); 526 if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE)) 527 continue; 528 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { 529 /* check that calculated value agrees with saved value */ 530 switch (sym->type) { 531 case S_BOOLEAN: 532 case S_TRISTATE: 533 if (sym->def[S_DEF_USER].tri == sym_get_tristate_value(sym)) 534 continue; 535 break; 536 default: 537 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val)) 538 continue; 539 break; 540 } 541 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE)) 542 /* no previous value and not saved */ 543 continue; 544 conf_unsaved++; 545 /* maybe print value in verbose mode... */ 546 } 547 548 for_all_symbols(i, sym) { 549 if (sym_has_value(sym) && !sym_is_choice_value(sym)) { 550 /* Reset values of generates values, so they'll appear 551 * as new, if they should become visible, but that 552 * doesn't quite work if the Kconfig and the saved 553 * configuration disagree. 554 */ 555 if (sym->visible == no && !conf_unsaved) 556 sym->flags &= ~SYMBOL_DEF_USER; 557 switch (sym->type) { 558 case S_STRING: 559 case S_INT: 560 case S_HEX: 561 /* Reset a string value if it's out of range */ 562 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val)) 563 break; 564 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER); 565 conf_unsaved++; 566 break; 567 default: 568 break; 569 } 570 } 571 } 572 573 sym_add_change_count(conf_warnings || conf_unsaved); 574 575 return 0; 576 } 577 578 /* 579 * Kconfig configuration printer 580 * 581 * This printer is used when generating the resulting configuration after 582 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by 583 * passing a non-NULL argument to the printer. 584 * 585 */ 586 static void 587 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 588 { 589 590 switch (sym->type) { 591 case S_BOOLEAN: 592 case S_TRISTATE: 593 if (*value == 'n') { 594 bool skip_unset = (arg != NULL); 595 596 if (!skip_unset) 597 fprintf(fp, "# %s%s is not set\n", 598 CONFIG_, sym->name); 599 return; 600 } 601 break; 602 default: 603 break; 604 } 605 606 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value); 607 } 608 609 static void 610 kconfig_print_comment(FILE *fp, const char *value, void *arg) 611 { 612 const char *p = value; 613 size_t l; 614 615 for (;;) { 616 l = strcspn(p, "\n"); 617 fprintf(fp, "#"); 618 if (l) { 619 fprintf(fp, " "); 620 xfwrite(p, l, 1, fp); 621 p += l; 622 } 623 fprintf(fp, "\n"); 624 if (*p++ == '\0') 625 break; 626 } 627 } 628 629 static struct conf_printer kconfig_printer_cb = 630 { 631 .print_symbol = kconfig_print_symbol, 632 .print_comment = kconfig_print_comment, 633 }; 634 635 /* 636 * Header printer 637 * 638 * This printer is used when generating the `include/generated/autoconf.h' file. 639 */ 640 static void 641 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) 642 { 643 644 switch (sym->type) { 645 case S_BOOLEAN: 646 case S_TRISTATE: { 647 const char *suffix = ""; 648 649 switch (*value) { 650 case 'n': 651 break; 652 case 'm': 653 suffix = "_MODULE"; 654 /* fall through */ 655 default: 656 fprintf(fp, "#define %s%s%s 1\n", 657 CONFIG_, sym->name, suffix); 658 } 659 break; 660 } 661 case S_HEX: { 662 const char *prefix = ""; 663 664 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X')) 665 prefix = "0x"; 666 fprintf(fp, "#define %s%s %s%s\n", 667 CONFIG_, sym->name, prefix, value); 668 break; 669 } 670 case S_STRING: 671 case S_INT: 672 fprintf(fp, "#define %s%s %s\n", 673 CONFIG_, sym->name, value); 674 break; 675 default: 676 break; 677 } 678 679 } 680 681 static void 682 header_print_comment(FILE *fp, const char *value, void *arg) 683 { 684 const char *p = value; 685 size_t l; 686 687 fprintf(fp, "/*\n"); 688 for (;;) { 689 l = strcspn(p, "\n"); 690 fprintf(fp, " *"); 691 if (l) { 692 fprintf(fp, " "); 693 xfwrite(p, l, 1, fp); 694 p += l; 695 } 696 fprintf(fp, "\n"); 697 if (*p++ == '\0') 698 break; 699 } 700 fprintf(fp, " */\n"); 701 } 702 703 static struct conf_printer header_printer_cb = 704 { 705 .print_symbol = header_print_symbol, 706 .print_comment = header_print_comment, 707 }; 708 709 static void conf_write_symbol(FILE *fp, struct symbol *sym, 710 struct conf_printer *printer, void *printer_arg) 711 { 712 const char *str; 713 714 switch (sym->type) { 715 case S_UNKNOWN: 716 break; 717 case S_STRING: 718 str = sym_get_string_value(sym); 719 str = sym_escape_string_value(str); 720 printer->print_symbol(fp, sym, str, printer_arg); 721 free((void *)str); 722 break; 723 default: 724 str = sym_get_string_value(sym); 725 printer->print_symbol(fp, sym, str, printer_arg); 726 } 727 } 728 729 static void 730 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg) 731 { 732 char buf[256]; 733 734 snprintf(buf, sizeof(buf), 735 "\n" 736 "Automatically generated file; DO NOT EDIT.\n" 737 "%s\n", 738 rootmenu.prompt->text); 739 740 printer->print_comment(fp, buf, printer_arg); 741 } 742 743 /* 744 * Write out a minimal config. 745 * All values that has default values are skipped as this is redundant. 746 */ 747 int conf_write_defconfig(const char *filename) 748 { 749 struct symbol *sym; 750 struct menu *menu; 751 FILE *out; 752 753 out = fopen(filename, "w"); 754 if (!out) 755 return 1; 756 757 sym_clear_all_valid(); 758 759 /* Traverse all menus to find all relevant symbols */ 760 menu = rootmenu.list; 761 762 while (menu != NULL) 763 { 764 sym = menu->sym; 765 if (sym == NULL) { 766 if (!menu_is_visible(menu)) 767 goto next_menu; 768 } else if (!sym_is_choice(sym)) { 769 sym_calc_value(sym); 770 if (!(sym->flags & SYMBOL_WRITE)) 771 goto next_menu; 772 sym->flags &= ~SYMBOL_WRITE; 773 /* If we cannot change the symbol - skip */ 774 if (!sym_is_changeable(sym)) 775 goto next_menu; 776 /* If symbol equals to default value - skip */ 777 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0) 778 goto next_menu; 779 780 /* 781 * If symbol is a choice value and equals to the 782 * default for a choice - skip. 783 * But only if value is bool and equal to "y" and 784 * choice is not "optional". 785 * (If choice is "optional" then all values can be "n") 786 */ 787 if (sym_is_choice_value(sym)) { 788 struct symbol *cs; 789 struct symbol *ds; 790 791 cs = prop_get_symbol(sym_get_choice_prop(sym)); 792 ds = sym_choice_default(cs); 793 if (!sym_is_optional(cs) && sym == ds) { 794 if ((sym->type == S_BOOLEAN) && 795 sym_get_tristate_value(sym) == yes) 796 goto next_menu; 797 } 798 } 799 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 800 } 801 next_menu: 802 if (menu->list != NULL) { 803 menu = menu->list; 804 } 805 else if (menu->next != NULL) { 806 menu = menu->next; 807 } else { 808 while ((menu = menu->parent)) { 809 if (menu->next != NULL) { 810 menu = menu->next; 811 break; 812 } 813 } 814 } 815 } 816 fclose(out); 817 return 0; 818 } 819 820 int conf_write(const char *name) 821 { 822 FILE *out; 823 struct symbol *sym; 824 struct menu *menu; 825 const char *str; 826 char tmpname[PATH_MAX + 1], oldname[PATH_MAX + 1]; 827 char *env; 828 int i; 829 bool need_newline = false; 830 831 if (!name) 832 name = conf_get_configname(); 833 834 if (!*name) { 835 fprintf(stderr, "config name is empty\n"); 836 return -1; 837 } 838 839 if (is_dir(name)) { 840 fprintf(stderr, "%s: Is a directory\n", name); 841 return -1; 842 } 843 844 if (make_parent_dir(name)) 845 return -1; 846 847 env = getenv("KCONFIG_OVERWRITECONFIG"); 848 if (env && *env) { 849 *tmpname = 0; 850 out = fopen(name, "w"); 851 } else { 852 snprintf(tmpname, sizeof(tmpname), "%s.%d.tmp", 853 name, (int)getpid()); 854 out = fopen(tmpname, "w"); 855 } 856 if (!out) 857 return 1; 858 859 conf_write_heading(out, &kconfig_printer_cb, NULL); 860 861 if (!conf_get_changed()) 862 sym_clear_all_valid(); 863 864 menu = rootmenu.list; 865 while (menu) { 866 sym = menu->sym; 867 if (!sym) { 868 if (!menu_is_visible(menu)) 869 goto next; 870 str = menu_get_prompt(menu); 871 fprintf(out, "\n" 872 "#\n" 873 "# %s\n" 874 "#\n", str); 875 need_newline = false; 876 } else if (!(sym->flags & SYMBOL_CHOICE) && 877 !(sym->flags & SYMBOL_WRITTEN)) { 878 sym_calc_value(sym); 879 if (!(sym->flags & SYMBOL_WRITE)) 880 goto next; 881 if (need_newline) { 882 fprintf(out, "\n"); 883 need_newline = false; 884 } 885 sym->flags |= SYMBOL_WRITTEN; 886 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); 887 } 888 889 next: 890 if (menu->list) { 891 menu = menu->list; 892 continue; 893 } 894 if (menu->next) 895 menu = menu->next; 896 else while ((menu = menu->parent)) { 897 if (!menu->sym && menu_is_visible(menu) && 898 menu != &rootmenu) { 899 str = menu_get_prompt(menu); 900 fprintf(out, "# end of %s\n", str); 901 need_newline = true; 902 } 903 if (menu->next) { 904 menu = menu->next; 905 break; 906 } 907 } 908 } 909 fclose(out); 910 911 for_all_symbols(i, sym) 912 sym->flags &= ~SYMBOL_WRITTEN; 913 914 if (*tmpname) { 915 if (is_same(name, tmpname)) { 916 conf_message("No change to %s", name); 917 unlink(tmpname); 918 sym_set_change_count(0); 919 return 0; 920 } 921 922 snprintf(oldname, sizeof(oldname), "%s.old", name); 923 rename(name, oldname); 924 if (rename(tmpname, name)) 925 return 1; 926 } 927 928 conf_message("configuration written to %s", name); 929 930 sym_set_change_count(0); 931 932 return 0; 933 } 934 935 /* write a dependency file as used by kbuild to track dependencies */ 936 static int conf_write_dep(const char *name) 937 { 938 struct file *file; 939 FILE *out; 940 941 out = fopen("..config.tmp", "w"); 942 if (!out) 943 return 1; 944 fprintf(out, "deps_config := \\\n"); 945 for (file = file_list; file; file = file->next) { 946 if (file->next) 947 fprintf(out, "\t%s \\\n", file->name); 948 else 949 fprintf(out, "\t%s\n", file->name); 950 } 951 fprintf(out, "\n%s: \\\n" 952 "\t$(deps_config)\n\n", conf_get_autoconfig_name()); 953 954 env_write_dep(out, conf_get_autoconfig_name()); 955 956 fprintf(out, "\n$(deps_config): ;\n"); 957 fclose(out); 958 959 if (make_parent_dir(name)) 960 return 1; 961 rename("..config.tmp", name); 962 return 0; 963 } 964 965 static int conf_touch_deps(void) 966 { 967 const char *name; 968 struct symbol *sym; 969 int res, i; 970 971 strcpy(depfile_path, "include/config/"); 972 depfile_prefix_len = strlen(depfile_path); 973 974 name = conf_get_autoconfig_name(); 975 conf_read_simple(name, S_DEF_AUTO); 976 sym_calc_value(modules_sym); 977 978 for_all_symbols(i, sym) { 979 sym_calc_value(sym); 980 if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name) 981 continue; 982 if (sym->flags & SYMBOL_WRITE) { 983 if (sym->flags & SYMBOL_DEF_AUTO) { 984 /* 985 * symbol has old and new value, 986 * so compare them... 987 */ 988 switch (sym->type) { 989 case S_BOOLEAN: 990 case S_TRISTATE: 991 if (sym_get_tristate_value(sym) == 992 sym->def[S_DEF_AUTO].tri) 993 continue; 994 break; 995 case S_STRING: 996 case S_HEX: 997 case S_INT: 998 if (!strcmp(sym_get_string_value(sym), 999 sym->def[S_DEF_AUTO].val)) 1000 continue; 1001 break; 1002 default: 1003 break; 1004 } 1005 } else { 1006 /* 1007 * If there is no old value, only 'no' (unset) 1008 * is allowed as new value. 1009 */ 1010 switch (sym->type) { 1011 case S_BOOLEAN: 1012 case S_TRISTATE: 1013 if (sym_get_tristate_value(sym) == no) 1014 continue; 1015 break; 1016 default: 1017 break; 1018 } 1019 } 1020 } else if (!(sym->flags & SYMBOL_DEF_AUTO)) 1021 /* There is neither an old nor a new value. */ 1022 continue; 1023 /* else 1024 * There is an old value, but no new value ('no' (unset) 1025 * isn't saved in auto.conf, so the old value is always 1026 * different from 'no'). 1027 */ 1028 1029 res = conf_touch_dep(sym->name); 1030 if (res) 1031 return res; 1032 } 1033 1034 return 0; 1035 } 1036 1037 int conf_write_autoconf(int overwrite) 1038 { 1039 struct symbol *sym; 1040 const char *name; 1041 const char *autoconf_name = conf_get_autoconfig_name(); 1042 FILE *out, *out_h; 1043 int i; 1044 1045 if (!overwrite && is_present(autoconf_name)) 1046 return 0; 1047 1048 conf_write_dep("include/config/auto.conf.cmd"); 1049 1050 if (conf_touch_deps()) 1051 return 1; 1052 1053 out = fopen(".tmpconfig", "w"); 1054 if (!out) 1055 return 1; 1056 1057 out_h = fopen(".tmpconfig.h", "w"); 1058 if (!out_h) { 1059 fclose(out); 1060 return 1; 1061 } 1062 1063 conf_write_heading(out, &kconfig_printer_cb, NULL); 1064 conf_write_heading(out_h, &header_printer_cb, NULL); 1065 1066 for_all_symbols(i, sym) { 1067 sym_calc_value(sym); 1068 if (!(sym->flags & SYMBOL_WRITE) || !sym->name) 1069 continue; 1070 1071 /* write symbols to auto.conf and autoconf.h */ 1072 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1); 1073 conf_write_symbol(out_h, sym, &header_printer_cb, NULL); 1074 } 1075 fclose(out); 1076 fclose(out_h); 1077 1078 name = getenv("KCONFIG_AUTOHEADER"); 1079 if (!name) 1080 name = "include/generated/autoconf.h"; 1081 if (make_parent_dir(name)) 1082 return 1; 1083 if (rename(".tmpconfig.h", name)) 1084 return 1; 1085 1086 if (make_parent_dir(autoconf_name)) 1087 return 1; 1088 /* 1089 * This must be the last step, kbuild has a dependency on auto.conf 1090 * and this marks the successful completion of the previous steps. 1091 */ 1092 if (rename(".tmpconfig", autoconf_name)) 1093 return 1; 1094 1095 return 0; 1096 } 1097 1098 static int sym_change_count; 1099 static void (*conf_changed_callback)(void); 1100 1101 void sym_set_change_count(int count) 1102 { 1103 int _sym_change_count = sym_change_count; 1104 sym_change_count = count; 1105 if (conf_changed_callback && 1106 (bool)_sym_change_count != (bool)count) 1107 conf_changed_callback(); 1108 } 1109 1110 void sym_add_change_count(int count) 1111 { 1112 sym_set_change_count(count + sym_change_count); 1113 } 1114 1115 bool conf_get_changed(void) 1116 { 1117 return sym_change_count; 1118 } 1119 1120 void conf_set_changed_callback(void (*fn)(void)) 1121 { 1122 conf_changed_callback = fn; 1123 } 1124 1125 static bool randomize_choice_values(struct symbol *csym) 1126 { 1127 struct property *prop; 1128 struct symbol *sym; 1129 struct expr *e; 1130 int cnt, def; 1131 1132 /* 1133 * If choice is mod then we may have more items selected 1134 * and if no then no-one. 1135 * In both cases stop. 1136 */ 1137 if (csym->curr.tri != yes) 1138 return false; 1139 1140 prop = sym_get_choice_prop(csym); 1141 1142 /* count entries in choice block */ 1143 cnt = 0; 1144 expr_list_for_each_sym(prop->expr, e, sym) 1145 cnt++; 1146 1147 /* 1148 * find a random value and set it to yes, 1149 * set the rest to no so we have only one set 1150 */ 1151 def = (rand() % cnt); 1152 1153 cnt = 0; 1154 expr_list_for_each_sym(prop->expr, e, sym) { 1155 if (def == cnt++) { 1156 sym->def[S_DEF_USER].tri = yes; 1157 csym->def[S_DEF_USER].val = sym; 1158 } 1159 else { 1160 sym->def[S_DEF_USER].tri = no; 1161 } 1162 sym->flags |= SYMBOL_DEF_USER; 1163 /* clear VALID to get value calculated */ 1164 sym->flags &= ~SYMBOL_VALID; 1165 } 1166 csym->flags |= SYMBOL_DEF_USER; 1167 /* clear VALID to get value calculated */ 1168 csym->flags &= ~(SYMBOL_VALID); 1169 1170 return true; 1171 } 1172 1173 void set_all_choice_values(struct symbol *csym) 1174 { 1175 struct property *prop; 1176 struct symbol *sym; 1177 struct expr *e; 1178 1179 prop = sym_get_choice_prop(csym); 1180 1181 /* 1182 * Set all non-assinged choice values to no 1183 */ 1184 expr_list_for_each_sym(prop->expr, e, sym) { 1185 if (!sym_has_value(sym)) 1186 sym->def[S_DEF_USER].tri = no; 1187 } 1188 csym->flags |= SYMBOL_DEF_USER; 1189 /* clear VALID to get value calculated */ 1190 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES); 1191 } 1192 1193 bool conf_set_all_new_symbols(enum conf_def_mode mode) 1194 { 1195 struct symbol *sym, *csym; 1196 int i, cnt, pby, pty, ptm; /* pby: probability of bool = y 1197 * pty: probability of tristate = y 1198 * ptm: probability of tristate = m 1199 */ 1200 1201 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case 1202 * below, otherwise gcc whines about 1203 * -Wmaybe-uninitialized */ 1204 if (mode == def_random) { 1205 int n, p[3]; 1206 char *env = getenv("KCONFIG_PROBABILITY"); 1207 n = 0; 1208 while( env && *env ) { 1209 char *endp; 1210 int tmp = strtol( env, &endp, 10 ); 1211 if( tmp >= 0 && tmp <= 100 ) { 1212 p[n++] = tmp; 1213 } else { 1214 errno = ERANGE; 1215 perror( "KCONFIG_PROBABILITY" ); 1216 exit( 1 ); 1217 } 1218 env = (*endp == ':') ? endp+1 : endp; 1219 if( n >=3 ) { 1220 break; 1221 } 1222 } 1223 switch( n ) { 1224 case 1: 1225 pby = p[0]; ptm = pby/2; pty = pby-ptm; 1226 break; 1227 case 2: 1228 pty = p[0]; ptm = p[1]; pby = pty + ptm; 1229 break; 1230 case 3: 1231 pby = p[0]; pty = p[1]; ptm = p[2]; 1232 break; 1233 } 1234 1235 if( pty+ptm > 100 ) { 1236 errno = ERANGE; 1237 perror( "KCONFIG_PROBABILITY" ); 1238 exit( 1 ); 1239 } 1240 } 1241 bool has_changed = false; 1242 1243 for_all_symbols(i, sym) { 1244 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID)) 1245 continue; 1246 switch (sym_get_type(sym)) { 1247 case S_BOOLEAN: 1248 case S_TRISTATE: 1249 has_changed = true; 1250 switch (mode) { 1251 case def_yes: 1252 sym->def[S_DEF_USER].tri = yes; 1253 break; 1254 case def_mod: 1255 sym->def[S_DEF_USER].tri = mod; 1256 break; 1257 case def_no: 1258 if (sym->flags & SYMBOL_ALLNOCONFIG_Y) 1259 sym->def[S_DEF_USER].tri = yes; 1260 else 1261 sym->def[S_DEF_USER].tri = no; 1262 break; 1263 case def_random: 1264 sym->def[S_DEF_USER].tri = no; 1265 cnt = rand() % 100; 1266 if (sym->type == S_TRISTATE) { 1267 if (cnt < pty) 1268 sym->def[S_DEF_USER].tri = yes; 1269 else if (cnt < (pty+ptm)) 1270 sym->def[S_DEF_USER].tri = mod; 1271 } else if (cnt < pby) 1272 sym->def[S_DEF_USER].tri = yes; 1273 break; 1274 default: 1275 continue; 1276 } 1277 if (!(sym_is_choice(sym) && mode == def_random)) 1278 sym->flags |= SYMBOL_DEF_USER; 1279 break; 1280 default: 1281 break; 1282 } 1283 1284 } 1285 1286 sym_clear_all_valid(); 1287 1288 /* 1289 * We have different type of choice blocks. 1290 * If curr.tri equals to mod then we can select several 1291 * choice symbols in one block. 1292 * In this case we do nothing. 1293 * If curr.tri equals yes then only one symbol can be 1294 * selected in a choice block and we set it to yes, 1295 * and the rest to no. 1296 */ 1297 if (mode != def_random) { 1298 for_all_symbols(i, csym) { 1299 if ((sym_is_choice(csym) && !sym_has_value(csym)) || 1300 sym_is_choice_value(csym)) 1301 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES; 1302 } 1303 } 1304 1305 for_all_symbols(i, csym) { 1306 if (sym_has_value(csym) || !sym_is_choice(csym)) 1307 continue; 1308 1309 sym_calc_value(csym); 1310 if (mode == def_random) 1311 has_changed |= randomize_choice_values(csym); 1312 else { 1313 set_all_choice_values(csym); 1314 has_changed = true; 1315 } 1316 } 1317 1318 return has_changed; 1319 } 1320 1321 void conf_rewrite_mod_or_yes(enum conf_def_mode mode) 1322 { 1323 struct symbol *sym; 1324 int i; 1325 tristate old_val = (mode == def_y2m) ? yes : mod; 1326 tristate new_val = (mode == def_y2m) ? mod : yes; 1327 1328 for_all_symbols(i, sym) { 1329 if (sym_get_type(sym) == S_TRISTATE && 1330 sym->def[S_DEF_USER].tri == old_val) 1331 sym->def[S_DEF_USER].tri = new_val; 1332 } 1333 sym_clear_all_valid(); 1334 } 1335