kernel: add missing symbol for 4.4
[openwrt/openwrt.git] / scripts / config / confdata.c
1 /*
2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
4 */
5
6 #include <sys/stat.h>
7 #include <ctype.h>
8 #include <errno.h>
9 #include <fcntl.h>
10 #include <stdarg.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <time.h>
15 #include <unistd.h>
16
17 #include "lkc.h"
18
19 static void conf_warning(const char *fmt, ...)
20 __attribute__ ((format (printf, 1, 2)));
21
22 static void conf_message(const char *fmt, ...)
23 __attribute__ ((format (printf, 1, 2)));
24
25 static const char *conf_filename;
26 static int conf_lineno, conf_warnings, conf_unsaved;
27
28 const char conf_defname[] = "arch/$ARCH/defconfig";
29
30 static void conf_warning(const char *fmt, ...)
31 {
32 va_list ap;
33 va_start(ap, fmt);
34 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
35 vfprintf(stderr, fmt, ap);
36 fprintf(stderr, "\n");
37 va_end(ap);
38 conf_warnings++;
39 }
40
41 static void conf_default_message_callback(const char *fmt, va_list ap)
42 {
43 printf("#\n# ");
44 vprintf(fmt, ap);
45 printf("\n#\n");
46 }
47
48 static void (*conf_message_callback) (const char *fmt, va_list ap) =
49 conf_default_message_callback;
50 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
51 {
52 conf_message_callback = fn;
53 }
54
55 static void conf_message(const char *fmt, ...)
56 {
57 va_list ap;
58
59 va_start(ap, fmt);
60 if (conf_message_callback)
61 conf_message_callback(fmt, ap);
62 }
63
64 const char *conf_get_configname(void)
65 {
66 char *name = getenv("KCONFIG_CONFIG");
67
68 return name ? name : ".config";
69 }
70
71 const char *conf_get_autoconfig_name(void)
72 {
73 char *name = getenv("KCONFIG_AUTOCONFIG");
74
75 return name ? name : "include/config/auto.conf";
76 }
77
78 static char *conf_expand_value(const char *in)
79 {
80 struct symbol *sym;
81 const char *src;
82 static char res_value[SYMBOL_MAXLENGTH];
83 char *dst, name[SYMBOL_MAXLENGTH];
84
85 res_value[0] = 0;
86 dst = name;
87 while ((src = strchr(in, '$'))) {
88 strncat(res_value, in, src - in);
89 src++;
90 dst = name;
91 while (isalnum(*src) || *src == '_')
92 *dst++ = *src++;
93 *dst = 0;
94 sym = sym_lookup(name, 0);
95 sym_calc_value(sym);
96 strcat(res_value, sym_get_string_value(sym));
97 in = src;
98 }
99 strcat(res_value, in);
100
101 return res_value;
102 }
103
104 char *conf_get_default_confname(void)
105 {
106 struct stat buf;
107 static char fullname[PATH_MAX+1];
108 char *env, *name;
109
110 name = conf_expand_value(conf_defname);
111 env = getenv(SRCTREE);
112 if (env) {
113 sprintf(fullname, "%s/%s", env, name);
114 if (!stat(fullname, &buf))
115 return fullname;
116 }
117 return name;
118 }
119
120 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
121 {
122 char *p2;
123
124 switch (sym->type) {
125 case S_TRISTATE:
126 if (p[0] == 'm') {
127 sym->def[def].tri = mod;
128 sym->flags |= def_flags;
129 break;
130 }
131 /* fall through */
132 case S_BOOLEAN:
133 if (p[0] == 'y') {
134 sym->def[def].tri = yes;
135 sym->flags |= def_flags;
136 break;
137 }
138 if (p[0] == 'n') {
139 sym->def[def].tri = no;
140 sym->flags |= def_flags;
141 break;
142 }
143 if (def != S_DEF_AUTO)
144 conf_warning("symbol value '%s' invalid for %s",
145 p, sym->name);
146 return 1;
147 case S_OTHER:
148 if (*p != '"') {
149 for (p2 = p; *p2 && !isspace(*p2); p2++)
150 ;
151 sym->type = S_STRING;
152 goto done;
153 }
154 /* fall through */
155 case S_STRING:
156 if (*p++ != '"')
157 break;
158 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
159 if (*p2 == '"') {
160 *p2 = 0;
161 break;
162 }
163 memmove(p2, p2 + 1, strlen(p2));
164 }
165 if (!p2) {
166 if (def != S_DEF_AUTO)
167 conf_warning("invalid string found");
168 return 1;
169 }
170 /* fall through */
171 case S_INT:
172 case S_HEX:
173 done:
174 if (sym_string_valid(sym, p)) {
175 sym->def[def].val = strdup(p);
176 sym->flags |= def_flags;
177 } else {
178 if (def != S_DEF_AUTO)
179 conf_warning("symbol value '%s' invalid for %s",
180 p, sym->name);
181 return 1;
182 }
183 break;
184 default:
185 ;
186 }
187 return 0;
188 }
189
190 #define LINE_GROWTH 16
191 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
192 {
193 char *nline;
194 size_t new_size = slen + 1;
195 if (new_size > *n) {
196 new_size += LINE_GROWTH - 1;
197 new_size *= 2;
198 nline = realloc(*lineptr, new_size);
199 if (!nline)
200 return -1;
201
202 *lineptr = nline;
203 *n = new_size;
204 }
205
206 (*lineptr)[slen] = c;
207
208 return 0;
209 }
210
211 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
212 {
213 char *line = *lineptr;
214 size_t slen = 0;
215
216 for (;;) {
217 int c = getc(stream);
218
219 switch (c) {
220 case '\n':
221 if (add_byte(c, &line, slen, n) < 0)
222 goto e_out;
223 slen++;
224 /* fall through */
225 case EOF:
226 if (add_byte('\0', &line, slen, n) < 0)
227 goto e_out;
228 *lineptr = line;
229 if (slen == 0)
230 return -1;
231 return slen;
232 default:
233 if (add_byte(c, &line, slen, n) < 0)
234 goto e_out;
235 slen++;
236 }
237 }
238
239 e_out:
240 line[slen-1] = '\0';
241 *lineptr = line;
242 return -1;
243 }
244
245 void conf_reset(int def)
246 {
247 struct symbol *sym;
248 int i, def_flags;
249
250 def_flags = SYMBOL_DEF << def;
251 for_all_symbols(i, sym) {
252 sym->flags |= SYMBOL_CHANGED;
253 sym->flags &= ~(def_flags|SYMBOL_VALID);
254 if (sym_is_choice(sym))
255 sym->flags |= def_flags;
256 switch (sym->type) {
257 case S_INT:
258 case S_HEX:
259 case S_STRING:
260 if (sym->def[def].val)
261 free(sym->def[def].val);
262 /* fall through */
263 default:
264 sym->def[def].val = NULL;
265 sym->def[def].tri = no;
266 }
267 }
268 }
269
270 int conf_read_simple(const char *name, int def)
271 {
272 FILE *in = NULL;
273 char *line = NULL;
274 size_t line_asize = 0;
275 char *p, *p2;
276 struct symbol *sym;
277 int def_flags;
278
279 if (name) {
280 in = zconf_fopen(name);
281 } else {
282 struct property *prop;
283
284 name = conf_get_configname();
285 in = zconf_fopen(name);
286 if (in)
287 goto load;
288 sym_add_change_count(1);
289 if (!sym_defconfig_list) {
290 if (modules_sym)
291 sym_calc_value(modules_sym);
292 return 1;
293 }
294
295 for_all_defaults(sym_defconfig_list, prop) {
296 if (expr_calc_value(prop->visible.expr) == no ||
297 prop->expr->type != E_SYMBOL)
298 continue;
299 name = conf_expand_value(prop->expr->left.sym->name);
300 in = zconf_fopen(name);
301 if (in) {
302 conf_message(_("using defaults found in %s"),
303 name);
304 goto load;
305 }
306 }
307 }
308 if (!in)
309 return 1;
310
311 load:
312 conf_filename = name;
313 conf_lineno = 0;
314 conf_warnings = 0;
315 conf_unsaved = 0;
316
317 def_flags = SYMBOL_DEF << def;
318 conf_reset(def);
319
320 while (compat_getline(&line, &line_asize, in) != -1) {
321 conf_lineno++;
322 sym = NULL;
323 if (line[0] == '#') {
324 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
325 continue;
326 p = strchr(line + 2 + strlen(CONFIG_), ' ');
327 if (!p)
328 continue;
329 *p++ = 0;
330 if (strncmp(p, "is not set", 10))
331 continue;
332 if (def == S_DEF_USER) {
333 sym = sym_find(line + 2 + strlen(CONFIG_));
334 if (!sym) {
335 sym_add_change_count(1);
336 goto setsym;
337 }
338 } else {
339 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
340 if (sym->type == S_UNKNOWN)
341 sym->type = S_BOOLEAN;
342 }
343 switch (sym->type) {
344 case S_BOOLEAN:
345 case S_TRISTATE:
346 sym->def[def].tri = no;
347 sym->flags |= def_flags;
348 break;
349 default:
350 ;
351 }
352 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
353 p = strchr(line + strlen(CONFIG_), '=');
354 if (!p)
355 continue;
356 *p++ = 0;
357 p2 = strchr(p, '\n');
358 if (p2) {
359 *p2-- = 0;
360 if (*p2 == '\r')
361 *p2 = 0;
362 }
363 if (def == S_DEF_USER) {
364 sym = sym_find(line + strlen(CONFIG_));
365 if (!sym) {
366 sym_add_change_count(1);
367 goto setsym;
368 }
369 } else {
370 sym = sym_lookup(line + strlen(CONFIG_), 0);
371 if (sym->type == S_UNKNOWN)
372 sym->type = S_OTHER;
373 }
374 if (conf_set_sym_val(sym, def, def_flags, p))
375 continue;
376 } else {
377 if (line[0] != '\r' && line[0] != '\n')
378 conf_warning("unexpected data");
379 continue;
380 }
381 setsym:
382 if (sym && sym_is_choice_value(sym)) {
383 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
384 switch (sym->def[def].tri) {
385 case no:
386 break;
387 case mod:
388 if (cs->def[def].tri == yes) {
389 conf_warning("%s creates inconsistent choice state", sym->name);
390 cs->flags &= ~def_flags;
391 }
392 break;
393 case yes:
394 if (cs->def[def].tri != no)
395 conf_warning("override: %s changes choice state", sym->name);
396 cs->def[def].val = sym;
397 break;
398 }
399 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
400 }
401 }
402 free(line);
403 fclose(in);
404
405 if (modules_sym)
406 sym_calc_value(modules_sym);
407 return 0;
408 }
409
410 int conf_read(const char *name)
411 {
412 struct symbol *sym;
413 int i;
414
415 sym_set_change_count(0);
416
417 if (conf_read_simple(name, S_DEF_USER))
418 return 1;
419
420 for_all_symbols(i, sym) {
421 sym_calc_value(sym);
422 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
423 continue;
424 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
425 /* check that calculated value agrees with saved value */
426 switch (sym->type) {
427 case S_BOOLEAN:
428 case S_TRISTATE:
429 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
430 break;
431 if (!sym_is_choice(sym))
432 continue;
433 /* fall through */
434 default:
435 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
436 continue;
437 break;
438 }
439 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
440 /* no previous value and not saved */
441 continue;
442 conf_unsaved++;
443 /* maybe print value in verbose mode... */
444 }
445
446 for_all_symbols(i, sym) {
447 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
448 /* Reset values of generates values, so they'll appear
449 * as new, if they should become visible, but that
450 * doesn't quite work if the Kconfig and the saved
451 * configuration disagree.
452 */
453 if (sym->visible == no && !conf_unsaved)
454 sym->flags &= ~SYMBOL_DEF_USER;
455 switch (sym->type) {
456 case S_STRING:
457 case S_INT:
458 case S_HEX:
459 /* Reset a string value if it's out of range */
460 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
461 break;
462 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
463 conf_unsaved++;
464 break;
465 default:
466 break;
467 }
468 }
469 }
470
471 sym_add_change_count(conf_warnings || conf_unsaved);
472
473 return 0;
474 }
475
476 /*
477 * Kconfig configuration printer
478 *
479 * This printer is used when generating the resulting configuration after
480 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
481 * passing a non-NULL argument to the printer.
482 *
483 */
484 static void
485 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
486 {
487
488 switch (sym->type) {
489 case S_BOOLEAN:
490 case S_TRISTATE:
491 if (*value == 'n') {
492 bool skip_unset = (arg != NULL);
493
494 if (!skip_unset)
495 fprintf(fp, "# %s%s is not set\n",
496 CONFIG_, sym->name);
497 return;
498 }
499 break;
500 default:
501 break;
502 }
503
504 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
505 }
506
507 static void
508 kconfig_print_comment(FILE *fp, const char *value, void *arg)
509 {
510 const char *p = value;
511 size_t l;
512
513 for (;;) {
514 l = strcspn(p, "\n");
515 fprintf(fp, "#");
516 if (l) {
517 fprintf(fp, " ");
518 xfwrite(p, l, 1, fp);
519 p += l;
520 }
521 fprintf(fp, "\n");
522 if (*p++ == '\0')
523 break;
524 }
525 }
526
527 static struct conf_printer kconfig_printer_cb =
528 {
529 .print_symbol = kconfig_print_symbol,
530 .print_comment = kconfig_print_comment,
531 };
532
533 /*
534 * Header printer
535 *
536 * This printer is used when generating the `include/generated/autoconf.h' file.
537 */
538 static void
539 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
540 {
541
542 switch (sym->type) {
543 case S_BOOLEAN:
544 case S_TRISTATE: {
545 const char *suffix = "";
546
547 switch (*value) {
548 case 'n':
549 break;
550 case 'm':
551 suffix = "_MODULE";
552 /* fall through */
553 default:
554 fprintf(fp, "#define %s%s%s 1\n",
555 CONFIG_, sym->name, suffix);
556 }
557 break;
558 }
559 case S_HEX: {
560 const char *prefix = "";
561
562 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
563 prefix = "0x";
564 fprintf(fp, "#define %s%s %s%s\n",
565 CONFIG_, sym->name, prefix, value);
566 break;
567 }
568 case S_STRING:
569 case S_INT:
570 fprintf(fp, "#define %s%s %s\n",
571 CONFIG_, sym->name, value);
572 break;
573 default:
574 break;
575 }
576
577 }
578
579 static void
580 header_print_comment(FILE *fp, const char *value, void *arg)
581 {
582 const char *p = value;
583 size_t l;
584
585 fprintf(fp, "/*\n");
586 for (;;) {
587 l = strcspn(p, "\n");
588 fprintf(fp, " *");
589 if (l) {
590 fprintf(fp, " ");
591 xfwrite(p, l, 1, fp);
592 p += l;
593 }
594 fprintf(fp, "\n");
595 if (*p++ == '\0')
596 break;
597 }
598 fprintf(fp, " */\n");
599 }
600
601 static struct conf_printer header_printer_cb =
602 {
603 .print_symbol = header_print_symbol,
604 .print_comment = header_print_comment,
605 };
606
607 /*
608 * Tristate printer
609 *
610 * This printer is used when generating the `include/config/tristate.conf' file.
611 */
612 static void
613 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
614 {
615
616 if (sym->type == S_TRISTATE && *value != 'n')
617 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
618 }
619
620 static struct conf_printer tristate_printer_cb =
621 {
622 .print_symbol = tristate_print_symbol,
623 .print_comment = kconfig_print_comment,
624 };
625
626 static void conf_write_symbol(FILE *fp, struct symbol *sym,
627 struct conf_printer *printer, void *printer_arg)
628 {
629 const char *str;
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 str = sym_escape_string_value(str);
638 printer->print_symbol(fp, sym, str, printer_arg);
639 free((void *)str);
640 break;
641 default:
642 str = sym_get_string_value(sym);
643 printer->print_symbol(fp, sym, str, printer_arg);
644 }
645 }
646
647 static void
648 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
649 {
650 char buf[256];
651
652 snprintf(buf, sizeof(buf),
653 "\n"
654 "Automatically generated file; DO NOT EDIT.\n"
655 "%s\n",
656 rootmenu.prompt->text);
657
658 printer->print_comment(fp, buf, printer_arg);
659 }
660
661 /*
662 * Write out a minimal config.
663 * All values that has default values are skipped as this is redundant.
664 */
665 int conf_write_defconfig(const char *filename)
666 {
667 struct symbol *sym;
668 struct menu *menu;
669 FILE *out;
670
671 out = fopen(filename, "w");
672 if (!out)
673 return 1;
674
675 sym_clear_all_valid();
676
677 /* Traverse all menus to find all relevant symbols */
678 menu = rootmenu.list;
679
680 while (menu != NULL)
681 {
682 sym = menu->sym;
683 if (sym == NULL) {
684 if (!menu_is_visible(menu))
685 goto next_menu;
686 } else if (!sym_is_choice(sym)) {
687 sym_calc_value(sym);
688 if (!(sym->flags & SYMBOL_WRITE))
689 goto next_menu;
690 sym->flags &= ~SYMBOL_WRITE;
691 /* If we cannot change the symbol - skip */
692 if (!sym_is_changable(sym))
693 goto next_menu;
694 /* If symbol equals to default value - skip */
695 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
696 goto next_menu;
697
698 /*
699 * If symbol is a choice value and equals to the
700 * default for a choice - skip.
701 * But only if value is bool and equal to "y" and
702 * choice is not "optional".
703 * (If choice is "optional" then all values can be "n")
704 */
705 if (sym_is_choice_value(sym)) {
706 struct symbol *cs;
707 struct symbol *ds;
708
709 cs = prop_get_symbol(sym_get_choice_prop(sym));
710 ds = sym_choice_default(cs);
711 if (!sym_is_optional(cs) && sym == ds) {
712 if ((sym->type == S_BOOLEAN) &&
713 sym_get_tristate_value(sym) == yes)
714 goto next_menu;
715 }
716 }
717 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
718 }
719 next_menu:
720 if (menu->list != NULL) {
721 menu = menu->list;
722 }
723 else if (menu->next != NULL) {
724 menu = menu->next;
725 } else {
726 while ((menu = menu->parent)) {
727 if (menu->next != NULL) {
728 menu = menu->next;
729 break;
730 }
731 }
732 }
733 }
734 fclose(out);
735 return 0;
736 }
737
738 int conf_write(const char *name)
739 {
740 FILE *out;
741 struct symbol *sym;
742 struct menu *menu;
743 const char *basename;
744 const char *str;
745 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
746 char *env;
747
748 dirname[0] = 0;
749 if (name && name[0]) {
750 struct stat st;
751 char *slash;
752
753 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
754 strcpy(dirname, name);
755 strcat(dirname, "/");
756 basename = conf_get_configname();
757 } else if ((slash = strrchr(name, '/'))) {
758 int size = slash - name + 1;
759 memcpy(dirname, name, size);
760 dirname[size] = 0;
761 if (slash[1])
762 basename = slash + 1;
763 else
764 basename = conf_get_configname();
765 } else
766 basename = name;
767 } else
768 basename = conf_get_configname();
769
770 sprintf(newname, "%s%s", dirname, basename);
771 env = getenv("KCONFIG_OVERWRITECONFIG");
772 if (!env || !*env) {
773 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
774 out = fopen(tmpname, "w");
775 } else {
776 *tmpname = 0;
777 out = fopen(newname, "w");
778 }
779 if (!out)
780 return 1;
781
782 conf_write_heading(out, &kconfig_printer_cb, NULL);
783
784 if (!conf_get_changed())
785 sym_clear_all_valid();
786
787 menu = rootmenu.list;
788 while (menu) {
789 sym = menu->sym;
790 if (!sym) {
791 if (!menu_is_visible(menu))
792 goto next;
793 str = menu_get_prompt(menu);
794 fprintf(out, "\n"
795 "#\n"
796 "# %s\n"
797 "#\n", str);
798 } else if (!(sym->flags & SYMBOL_CHOICE)) {
799 sym_calc_value(sym);
800 if (!(sym->flags & SYMBOL_WRITE))
801 goto next;
802 sym->flags &= ~SYMBOL_WRITE;
803
804 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
805 }
806
807 next:
808 if (menu->list) {
809 menu = menu->list;
810 continue;
811 }
812 if (menu->next)
813 menu = menu->next;
814 else while ((menu = menu->parent)) {
815 if (menu->next) {
816 menu = menu->next;
817 break;
818 }
819 }
820 }
821 fclose(out);
822
823 if (*tmpname) {
824 strcat(dirname, basename);
825 strcat(dirname, ".old");
826 rename(newname, dirname);
827 if (rename(tmpname, newname))
828 return 1;
829 }
830
831 conf_message(_("configuration written to %s"), newname);
832
833 sym_set_change_count(0);
834
835 return 0;
836 }
837
838 static int conf_split_config(void)
839 {
840 const char *name;
841 char path[PATH_MAX+1];
842 char *s, *d, c;
843 struct symbol *sym;
844 struct stat sb;
845 int res, i, fd;
846
847 name = conf_get_autoconfig_name();
848 conf_read_simple(name, S_DEF_AUTO);
849
850 if (chdir("include/config"))
851 return 1;
852
853 res = 0;
854 for_all_symbols(i, sym) {
855 sym_calc_value(sym);
856 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
857 continue;
858 if (sym->flags & SYMBOL_WRITE) {
859 if (sym->flags & SYMBOL_DEF_AUTO) {
860 /*
861 * symbol has old and new value,
862 * so compare them...
863 */
864 switch (sym->type) {
865 case S_BOOLEAN:
866 case S_TRISTATE:
867 if (sym_get_tristate_value(sym) ==
868 sym->def[S_DEF_AUTO].tri)
869 continue;
870 break;
871 case S_STRING:
872 case S_HEX:
873 case S_INT:
874 if (!strcmp(sym_get_string_value(sym),
875 sym->def[S_DEF_AUTO].val))
876 continue;
877 break;
878 default:
879 break;
880 }
881 } else {
882 /*
883 * If there is no old value, only 'no' (unset)
884 * is allowed as new value.
885 */
886 switch (sym->type) {
887 case S_BOOLEAN:
888 case S_TRISTATE:
889 if (sym_get_tristate_value(sym) == no)
890 continue;
891 break;
892 default:
893 break;
894 }
895 }
896 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
897 /* There is neither an old nor a new value. */
898 continue;
899 /* else
900 * There is an old value, but no new value ('no' (unset)
901 * isn't saved in auto.conf, so the old value is always
902 * different from 'no').
903 */
904
905 /* Replace all '_' and append ".h" */
906 s = sym->name;
907 d = path;
908 while ((c = *s++)) {
909 c = tolower(c);
910 *d++ = (c == '_') ? '/' : c;
911 }
912 strcpy(d, ".h");
913
914 /* Assume directory path already exists. */
915 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
916 if (fd == -1) {
917 if (errno != ENOENT) {
918 res = 1;
919 break;
920 }
921 /*
922 * Create directory components,
923 * unless they exist already.
924 */
925 d = path;
926 while ((d = strchr(d, '/'))) {
927 *d = 0;
928 if (stat(path, &sb) && mkdir(path, 0755)) {
929 res = 1;
930 goto out;
931 }
932 *d++ = '/';
933 }
934 /* Try it again. */
935 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
936 if (fd == -1) {
937 res = 1;
938 break;
939 }
940 }
941 close(fd);
942 }
943 out:
944 if (chdir("../.."))
945 return 1;
946
947 return res;
948 }
949
950 int conf_write_autoconf(void)
951 {
952 struct symbol *sym;
953 const char *name;
954 FILE *out, *tristate, *out_h;
955 int i;
956
957 sym_clear_all_valid();
958
959 file_write_dep("include/config/auto.conf.cmd");
960
961 if (conf_split_config())
962 return 1;
963
964 out = fopen(".tmpconfig", "w");
965 if (!out)
966 return 1;
967
968 tristate = fopen(".tmpconfig_tristate", "w");
969 if (!tristate) {
970 fclose(out);
971 return 1;
972 }
973
974 out_h = fopen(".tmpconfig.h", "w");
975 if (!out_h) {
976 fclose(out);
977 fclose(tristate);
978 return 1;
979 }
980
981 conf_write_heading(out, &kconfig_printer_cb, NULL);
982
983 conf_write_heading(tristate, &tristate_printer_cb, NULL);
984
985 conf_write_heading(out_h, &header_printer_cb, NULL);
986
987 for_all_symbols(i, sym) {
988 sym_calc_value(sym);
989 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
990 continue;
991
992 /* write symbol to auto.conf, tristate and header files */
993 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
994
995 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
996
997 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
998 }
999 fclose(out);
1000 fclose(tristate);
1001 fclose(out_h);
1002
1003 name = getenv("KCONFIG_AUTOHEADER");
1004 if (!name)
1005 name = "include/generated/autoconf.h";
1006 if (rename(".tmpconfig.h", name))
1007 return 1;
1008 name = getenv("KCONFIG_TRISTATE");
1009 if (!name)
1010 name = "include/config/tristate.conf";
1011 if (rename(".tmpconfig_tristate", name))
1012 return 1;
1013 name = conf_get_autoconfig_name();
1014 /*
1015 * This must be the last step, kbuild has a dependency on auto.conf
1016 * and this marks the successful completion of the previous steps.
1017 */
1018 if (rename(".tmpconfig", name))
1019 return 1;
1020
1021 return 0;
1022 }
1023
1024 static int sym_change_count;
1025 static void (*conf_changed_callback)(void);
1026
1027 void sym_set_change_count(int count)
1028 {
1029 int _sym_change_count = sym_change_count;
1030 sym_change_count = count;
1031 if (conf_changed_callback &&
1032 (bool)_sym_change_count != (bool)count)
1033 conf_changed_callback();
1034 }
1035
1036 void sym_add_change_count(int count)
1037 {
1038 sym_set_change_count(count + sym_change_count);
1039 }
1040
1041 bool conf_get_changed(void)
1042 {
1043 return sym_change_count;
1044 }
1045
1046 void conf_set_changed_callback(void (*fn)(void))
1047 {
1048 conf_changed_callback = fn;
1049 }
1050
1051 static bool randomize_choice_values(struct symbol *csym)
1052 {
1053 struct property *prop;
1054 struct symbol *sym;
1055 struct expr *e;
1056 int cnt, def;
1057
1058 /*
1059 * If choice is mod then we may have more items selected
1060 * and if no then no-one.
1061 * In both cases stop.
1062 */
1063 if (csym->curr.tri != yes)
1064 return false;
1065
1066 prop = sym_get_choice_prop(csym);
1067
1068 /* count entries in choice block */
1069 cnt = 0;
1070 expr_list_for_each_sym(prop->expr, e, sym)
1071 cnt++;
1072
1073 /*
1074 * find a random value and set it to yes,
1075 * set the rest to no so we have only one set
1076 */
1077 def = (rand() % cnt);
1078
1079 cnt = 0;
1080 expr_list_for_each_sym(prop->expr, e, sym) {
1081 if (def == cnt++) {
1082 sym->def[S_DEF_USER].tri = yes;
1083 csym->def[S_DEF_USER].val = sym;
1084 }
1085 else {
1086 sym->def[S_DEF_USER].tri = no;
1087 }
1088 sym->flags |= SYMBOL_DEF_USER;
1089 /* clear VALID to get value calculated */
1090 sym->flags &= ~SYMBOL_VALID;
1091 }
1092 csym->flags |= SYMBOL_DEF_USER;
1093 /* clear VALID to get value calculated */
1094 csym->flags &= ~(SYMBOL_VALID);
1095
1096 return true;
1097 }
1098
1099 void set_all_choice_values(struct symbol *csym)
1100 {
1101 struct property *prop;
1102 struct symbol *sym;
1103 struct expr *e;
1104
1105 prop = sym_get_choice_prop(csym);
1106
1107 /*
1108 * Set all non-assinged choice values to no
1109 */
1110 expr_list_for_each_sym(prop->expr, e, sym) {
1111 if (!sym_has_value(sym))
1112 sym->def[S_DEF_USER].tri = no;
1113 }
1114 csym->flags |= SYMBOL_DEF_USER;
1115 /* clear VALID to get value calculated */
1116 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1117 }
1118
1119 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1120 {
1121 struct symbol *sym, *csym;
1122 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y
1123 * pty: probability of tristate = y
1124 * ptm: probability of tristate = m
1125 */
1126
1127 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1128 * below, otherwise gcc whines about
1129 * -Wmaybe-uninitialized */
1130 if (mode == def_random) {
1131 int n, p[3];
1132 char *env = getenv("KCONFIG_PROBABILITY");
1133 n = 0;
1134 while( env && *env ) {
1135 char *endp;
1136 int tmp = strtol( env, &endp, 10 );
1137 if( tmp >= 0 && tmp <= 100 ) {
1138 p[n++] = tmp;
1139 } else {
1140 errno = ERANGE;
1141 perror( "KCONFIG_PROBABILITY" );
1142 exit( 1 );
1143 }
1144 env = (*endp == ':') ? endp+1 : endp;
1145 if( n >=3 ) {
1146 break;
1147 }
1148 }
1149 switch( n ) {
1150 case 1:
1151 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1152 break;
1153 case 2:
1154 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1155 break;
1156 case 3:
1157 pby = p[0]; pty = p[1]; ptm = p[2];
1158 break;
1159 }
1160
1161 if( pty+ptm > 100 ) {
1162 errno = ERANGE;
1163 perror( "KCONFIG_PROBABILITY" );
1164 exit( 1 );
1165 }
1166 }
1167 bool has_changed = false;
1168
1169 sym_clear_all_valid();
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 /*
1215 * We have different type of choice blocks.
1216 * If curr.tri equals to mod then we can select several
1217 * choice symbols in one block.
1218 * In this case we do nothing.
1219 * If curr.tri equals yes then only one symbol can be
1220 * selected in a choice block and we set it to yes,
1221 * and the rest to no.
1222 */
1223 if (mode != def_random) {
1224 for_all_symbols(i, csym) {
1225 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1226 sym_is_choice_value(csym))
1227 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1228 }
1229 }
1230
1231 for_all_symbols(i, csym) {
1232 if (sym_has_value(csym) || !sym_is_choice(csym))
1233 continue;
1234
1235 sym_calc_value(csym);
1236 if (mode == def_random)
1237 has_changed = randomize_choice_values(csym);
1238 else {
1239 set_all_choice_values(csym);
1240 has_changed = true;
1241 }
1242 }
1243
1244 return has_changed;
1245 }