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/$ARCH/defconfig";
29
conf_warning(const char * fmt,...)30 static void conf_warning(const char *fmt, ...)
31 {
32 va_list ap;
33 va_start(ap, fmt);
34 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
35 vfprintf(stderr, fmt, ap);
36 fprintf(stderr, "\n");
37 va_end(ap);
38 conf_warnings++;
39 }
40
conf_default_message_callback(const char * fmt,va_list ap)41 static void conf_default_message_callback(const char *fmt, va_list ap)
42 {
43 printf("#\n# ");
44 vprintf(fmt, ap);
45 printf("\n#\n");
46 }
47
48 static void (*conf_message_callback) (const char *fmt, va_list ap) =
49 conf_default_message_callback;
conf_set_message_callback(void (* fn)(const char * fmt,va_list ap))50 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
51 {
52 conf_message_callback = fn;
53 }
54
conf_message(const char * fmt,...)55 static void conf_message(const char *fmt, ...)
56 {
57 va_list ap;
58
59 va_start(ap, fmt);
60 if (conf_message_callback)
61 conf_message_callback(fmt, ap);
62 }
63
conf_get_configname(void)64 const char *conf_get_configname(void)
65 {
66 char *name = getenv("KCONFIG_CONFIG");
67
68 return name ? name : ".config";
69 }
70
conf_get_autoconfig_name(void)71 const char *conf_get_autoconfig_name(void)
72 {
73 char *name = getenv("KCONFIG_AUTOCONFIG");
74
75 return name ? name : "include/config/auto.conf";
76 }
77
conf_expand_value(const char * in)78 static char *conf_expand_value(const char *in)
79 {
80 struct symbol *sym;
81 const char *src;
82 static char res_value[SYMBOL_MAXLENGTH];
83 char *dst, name[SYMBOL_MAXLENGTH];
84
85 res_value[0] = 0;
86 dst = name;
87 while ((src = strchr(in, '$'))) {
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
conf_get_default_confname(void)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
conf_set_sym_val(struct symbol * sym,int def,int def_flags,char * p)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 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
144 return 1;
145 case S_OTHER:
146 if (*p != '"') {
147 for (p2 = p; *p2 && !isspace(*p2); p2++)
148 ;
149 sym->type = S_STRING;
150 goto done;
151 }
152 /* fall through */
153 case S_STRING:
154 if (*p++ != '"')
155 break;
156 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
157 if (*p2 == '"') {
158 *p2 = 0;
159 break;
160 }
161 memmove(p2, p2 + 1, strlen(p2));
162 }
163 if (!p2) {
164 conf_warning("invalid string found");
165 return 1;
166 }
167 /* fall through */
168 case S_INT:
169 case S_HEX:
170 done:
171 if (sym_string_valid(sym, p)) {
172 sym->def[def].val = strdup(p);
173 sym->flags |= def_flags;
174 } else {
175 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
176 return 1;
177 }
178 break;
179 default:
180 ;
181 }
182 return 0;
183 }
184
conf_read_simple(const char * name,int def)185 int conf_read_simple(const char *name, int def)
186 {
187 FILE *in = NULL;
188 char line[1024];
189 char *p, *p2;
190 struct symbol *sym;
191 int i, def_flags;
192
193 if (name) {
194 in = zconf_fopen(name);
195 } else {
196 struct property *prop;
197
198 name = conf_get_configname();
199 in = zconf_fopen(name);
200 if (in)
201 goto load;
202 sym_add_change_count(1);
203 if (!sym_defconfig_list) {
204 if (modules_sym)
205 sym_calc_value(modules_sym);
206 return 1;
207 }
208
209 for_all_defaults(sym_defconfig_list, prop) {
210 if (expr_calc_value(prop->visible.expr) == no ||
211 prop->expr->type != E_SYMBOL)
212 continue;
213 name = conf_expand_value(prop->expr->left.sym->name);
214 in = zconf_fopen(name);
215 if (in) {
216 conf_message(_("using defaults found in %s"),
217 name);
218 goto load;
219 }
220 }
221 }
222 if (!in)
223 return 1;
224
225 load:
226 conf_filename = name;
227 conf_lineno = 0;
228 conf_warnings = 0;
229 conf_unsaved = 0;
230
231 def_flags = SYMBOL_DEF << def;
232 for_all_symbols(i, sym) {
233 sym->flags |= SYMBOL_CHANGED;
234 sym->flags &= ~(def_flags|SYMBOL_VALID);
235 if (sym_is_choice(sym))
236 sym->flags |= def_flags;
237 switch (sym->type) {
238 case S_INT:
239 case S_HEX:
240 case S_STRING:
241 if (sym->def[def].val)
242 free(sym->def[def].val);
243 /* fall through */
244 default:
245 sym->def[def].val = NULL;
246 sym->def[def].tri = no;
247 }
248 }
249
250 while (fgets(line, sizeof(line), in)) {
251 conf_lineno++;
252 sym = NULL;
253 if (line[0] == '#') {
254 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
255 continue;
256 p = strchr(line + 2 + strlen(CONFIG_), ' ');
257 if (!p)
258 continue;
259 *p++ = 0;
260 if (strncmp(p, "is not set", 10))
261 continue;
262 if (def == S_DEF_USER) {
263 sym = sym_find(line + 2 + strlen(CONFIG_));
264 if (!sym) {
265 sym_add_change_count(1);
266 goto setsym;
267 }
268 } else {
269 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
270 if (sym->type == S_UNKNOWN)
271 sym->type = S_BOOLEAN;
272 }
273 if (sym->flags & def_flags) {
274 conf_warning("override: reassigning to symbol %s", sym->name);
275 }
276 switch (sym->type) {
277 case S_BOOLEAN:
278 case S_TRISTATE:
279 sym->def[def].tri = no;
280 sym->flags |= def_flags;
281 break;
282 default:
283 ;
284 }
285 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
286 p = strchr(line + strlen(CONFIG_), '=');
287 if (!p)
288 continue;
289 *p++ = 0;
290 p2 = strchr(p, '\n');
291 if (p2) {
292 *p2-- = 0;
293 if (*p2 == '\r')
294 *p2 = 0;
295 }
296 if (def == S_DEF_USER) {
297 sym = sym_find(line + strlen(CONFIG_));
298 if (!sym) {
299 sym_add_change_count(1);
300 goto setsym;
301 }
302 } else {
303 sym = sym_lookup(line + strlen(CONFIG_), 0);
304 if (sym->type == S_UNKNOWN)
305 sym->type = S_OTHER;
306 }
307 if (sym->flags & def_flags) {
308 conf_warning("override: reassigning to symbol %s", sym->name);
309 }
310 if (conf_set_sym_val(sym, def, def_flags, p))
311 continue;
312 } else {
313 if (line[0] != '\r' && line[0] != '\n')
314 conf_warning("unexpected data");
315 continue;
316 }
317 setsym:
318 if (sym && sym_is_choice_value(sym)) {
319 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
320 switch (sym->def[def].tri) {
321 case no:
322 break;
323 case mod:
324 if (cs->def[def].tri == yes) {
325 conf_warning("%s creates inconsistent choice state", sym->name);
326 cs->flags &= ~def_flags;
327 }
328 break;
329 case yes:
330 if (cs->def[def].tri != no)
331 conf_warning("override: %s changes choice state", sym->name);
332 cs->def[def].val = sym;
333 break;
334 }
335 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
336 }
337 }
338 fclose(in);
339
340 if (modules_sym)
341 sym_calc_value(modules_sym);
342 return 0;
343 }
344
conf_read(const char * name)345 int conf_read(const char *name)
346 {
347 struct symbol *sym;
348 int i;
349
350 sym_set_change_count(0);
351
352 if (conf_read_simple(name, S_DEF_USER))
353 return 1;
354
355 for_all_symbols(i, sym) {
356 sym_calc_value(sym);
357 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
358 continue;
359 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
360 /* check that calculated value agrees with saved value */
361 switch (sym->type) {
362 case S_BOOLEAN:
363 case S_TRISTATE:
364 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
365 break;
366 if (!sym_is_choice(sym))
367 continue;
368 /* fall through */
369 default:
370 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
371 continue;
372 break;
373 }
374 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
375 /* no previous value and not saved */
376 continue;
377 conf_unsaved++;
378 /* maybe print value in verbose mode... */
379 }
380
381 for_all_symbols(i, sym) {
382 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
383 /* Reset values of generates values, so they'll appear
384 * as new, if they should become visible, but that
385 * doesn't quite work if the Kconfig and the saved
386 * configuration disagree.
387 */
388 if (sym->visible == no && !conf_unsaved)
389 sym->flags &= ~SYMBOL_DEF_USER;
390 switch (sym->type) {
391 case S_STRING:
392 case S_INT:
393 case S_HEX:
394 /* Reset a string value if it's out of range */
395 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
396 break;
397 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
398 conf_unsaved++;
399 break;
400 default:
401 break;
402 }
403 }
404 }
405
406 sym_add_change_count(conf_warnings || conf_unsaved);
407
408 return 0;
409 }
410
411 /*
412 * Kconfig configuration printer
413 *
414 * This printer is used when generating the resulting configuration after
415 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
416 * passing a non-NULL argument to the printer.
417 *
418 */
419 static void
kconfig_print_symbol(FILE * fp,struct symbol * sym,const char * value,void * arg)420 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
421 {
422
423 switch (sym->type) {
424 case S_BOOLEAN:
425 case S_TRISTATE:
426 if (*value == 'n') {
427 bool skip_unset = (arg != NULL);
428
429 if (!skip_unset)
430 fprintf(fp, "# %s%s is not set\n",
431 CONFIG_, sym->name);
432 return;
433 }
434 break;
435 default:
436 break;
437 }
438
439 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
440 }
441
442 static void
kconfig_print_comment(FILE * fp,const char * value,void * arg)443 kconfig_print_comment(FILE *fp, const char *value, void *arg)
444 {
445 const char *p = value;
446 size_t l;
447
448 for (;;) {
449 l = strcspn(p, "\n");
450 fprintf(fp, "#");
451 if (l) {
452 fprintf(fp, " ");
453 xfwrite(p, l, 1, fp);
454 p += l;
455 }
456 fprintf(fp, "\n");
457 if (*p++ == '\0')
458 break;
459 }
460 }
461
462 static struct conf_printer kconfig_printer_cb =
463 {
464 .print_symbol = kconfig_print_symbol,
465 .print_comment = kconfig_print_comment,
466 };
467
468 /*
469 * Header printer
470 *
471 * This printer is used when generating the `include/generated/autoconf.h' file.
472 */
473 static void
header_print_symbol(FILE * fp,struct symbol * sym,const char * value,void * arg)474 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
475 {
476
477 switch (sym->type) {
478 case S_BOOLEAN:
479 case S_TRISTATE: {
480 const char *suffix = "";
481
482 switch (*value) {
483 case 'n':
484 break;
485 case 'm':
486 suffix = "_MODULE";
487 /* fall through */
488 default:
489 fprintf(fp, "#define %s%s%s 1\n",
490 CONFIG_, sym->name, suffix);
491 }
492 break;
493 }
494 case S_HEX: {
495 const char *prefix = "";
496
497 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
498 prefix = "0x";
499 fprintf(fp, "#define %s%s %s%s\n",
500 CONFIG_, sym->name, prefix, value);
501 break;
502 }
503 case S_STRING:
504 case S_INT:
505 fprintf(fp, "#define %s%s %s\n",
506 CONFIG_, sym->name, value);
507 break;
508 default:
509 break;
510 }
511
512 }
513
514 static void
header_print_comment(FILE * fp,const char * value,void * arg)515 header_print_comment(FILE *fp, const char *value, void *arg)
516 {
517 const char *p = value;
518 size_t l;
519
520 fprintf(fp, "/*\n");
521 for (;;) {
522 l = strcspn(p, "\n");
523 fprintf(fp, " *");
524 if (l) {
525 fprintf(fp, " ");
526 xfwrite(p, l, 1, fp);
527 p += l;
528 }
529 fprintf(fp, "\n");
530 if (*p++ == '\0')
531 break;
532 }
533 fprintf(fp, " */\n");
534 }
535
536 static struct conf_printer header_printer_cb =
537 {
538 .print_symbol = header_print_symbol,
539 .print_comment = header_print_comment,
540 };
541
542 /*
543 * Tristate printer
544 *
545 * This printer is used when generating the `include/config/tristate.conf' file.
546 */
547 static void
tristate_print_symbol(FILE * fp,struct symbol * sym,const char * value,void * arg)548 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
549 {
550
551 if (sym->type == S_TRISTATE && *value != 'n')
552 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
553 }
554
555 static struct conf_printer tristate_printer_cb =
556 {
557 .print_symbol = tristate_print_symbol,
558 .print_comment = kconfig_print_comment,
559 };
560
conf_write_symbol(FILE * fp,struct symbol * sym,struct conf_printer * printer,void * printer_arg)561 static void conf_write_symbol(FILE *fp, struct symbol *sym,
562 struct conf_printer *printer, void *printer_arg)
563 {
564 const char *str;
565
566 switch (sym->type) {
567 case S_OTHER:
568 case S_UNKNOWN:
569 break;
570 case S_STRING:
571 str = sym_get_string_value(sym);
572 str = sym_escape_string_value(str);
573 printer->print_symbol(fp, sym, str, printer_arg);
574 free((void *)str);
575 break;
576 default:
577 str = sym_get_string_value(sym);
578 printer->print_symbol(fp, sym, str, printer_arg);
579 }
580 }
581
582 static void
conf_write_heading(FILE * fp,struct conf_printer * printer,void * printer_arg)583 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
584 {
585 char buf[256];
586
587 snprintf(buf, sizeof(buf),
588 "\n"
589 "Automatically generated file; DO NOT EDIT.\n"
590 "%s\n",
591 rootmenu.prompt->text);
592
593 printer->print_comment(fp, buf, printer_arg);
594 }
595
596 /*
597 * Write out a minimal config.
598 * All values that has default values are skipped as this is redundant.
599 */
conf_write_defconfig(const char * filename)600 int conf_write_defconfig(const char *filename)
601 {
602 struct symbol *sym;
603 struct menu *menu;
604 FILE *out;
605
606 out = fopen(filename, "w");
607 if (!out)
608 return 1;
609
610 sym_clear_all_valid();
611
612 /* Traverse all menus to find all relevant symbols */
613 menu = rootmenu.list;
614
615 while (menu != NULL)
616 {
617 sym = menu->sym;
618 if (sym == NULL) {
619 if (!menu_is_visible(menu))
620 goto next_menu;
621 } else if (!sym_is_choice(sym)) {
622 sym_calc_value(sym);
623 if (!(sym->flags & SYMBOL_WRITE))
624 goto next_menu;
625 sym->flags &= ~SYMBOL_WRITE;
626 /* If we cannot change the symbol - skip */
627 if (!sym_is_changable(sym))
628 goto next_menu;
629 /* If symbol equals to default value - skip */
630 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
631 goto next_menu;
632
633 /*
634 * If symbol is a choice value and equals to the
635 * default for a choice - skip.
636 * But only if value is bool and equal to "y" and
637 * choice is not "optional".
638 * (If choice is "optional" then all values can be "n")
639 */
640 if (sym_is_choice_value(sym)) {
641 struct symbol *cs;
642 struct symbol *ds;
643
644 cs = prop_get_symbol(sym_get_choice_prop(sym));
645 ds = sym_choice_default(cs);
646 if (!sym_is_optional(cs) && sym == ds) {
647 if ((sym->type == S_BOOLEAN) &&
648 sym_get_tristate_value(sym) == yes)
649 goto next_menu;
650 }
651 }
652 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
653 }
654 next_menu:
655 if (menu->list != NULL) {
656 menu = menu->list;
657 }
658 else if (menu->next != NULL) {
659 menu = menu->next;
660 } else {
661 while ((menu = menu->parent)) {
662 if (menu->next != NULL) {
663 menu = menu->next;
664 break;
665 }
666 }
667 }
668 }
669 fclose(out);
670 return 0;
671 }
672
conf_write(const char * name)673 int conf_write(const char *name)
674 {
675 FILE *out;
676 struct symbol *sym;
677 struct menu *menu;
678 const char *basename;
679 const char *str;
680 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
681 char *env;
682
683 dirname[0] = 0;
684 if (name && name[0]) {
685 struct stat st;
686 char *slash;
687
688 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
689 strcpy(dirname, name);
690 strcat(dirname, "/");
691 basename = conf_get_configname();
692 } else if ((slash = strrchr(name, '/'))) {
693 int size = slash - name + 1;
694 memcpy(dirname, name, size);
695 dirname[size] = 0;
696 if (slash[1])
697 basename = slash + 1;
698 else
699 basename = conf_get_configname();
700 } else
701 basename = name;
702 } else
703 basename = conf_get_configname();
704
705 sprintf(newname, "%s%s", dirname, basename);
706 env = getenv("KCONFIG_OVERWRITECONFIG");
707 if (!env || !*env) {
708 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
709 out = fopen(tmpname, "w");
710 } else {
711 *tmpname = 0;
712 out = fopen(newname, "w");
713 }
714 if (!out)
715 return 1;
716
717 conf_write_heading(out, &kconfig_printer_cb, NULL);
718
719 if (!conf_get_changed())
720 sym_clear_all_valid();
721
722 menu = rootmenu.list;
723 while (menu) {
724 sym = menu->sym;
725 if (!sym) {
726 if (!menu_is_visible(menu))
727 goto next;
728 str = menu_get_prompt(menu);
729 fprintf(out, "\n"
730 "#\n"
731 "# %s\n"
732 "#\n", str);
733 } else if (!(sym->flags & SYMBOL_CHOICE)) {
734 sym_calc_value(sym);
735 if (!(sym->flags & SYMBOL_WRITE))
736 goto next;
737 sym->flags &= ~SYMBOL_WRITE;
738
739 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
740 }
741
742 next:
743 if (menu->list) {
744 menu = menu->list;
745 continue;
746 }
747 if (menu->next)
748 menu = menu->next;
749 else while ((menu = menu->parent)) {
750 if (menu->next) {
751 menu = menu->next;
752 break;
753 }
754 }
755 }
756 fclose(out);
757
758 if (*tmpname) {
759 strcat(dirname, basename);
760 strcat(dirname, ".old");
761 rename(newname, dirname);
762 if (rename(tmpname, newname))
763 return 1;
764 }
765
766 conf_message(_("configuration written to %s"), newname);
767
768 sym_set_change_count(0);
769
770 return 0;
771 }
772
conf_split_config(void)773 static int conf_split_config(void)
774 {
775 const char *name;
776 char path[PATH_MAX+1];
777 char *s, *d, c;
778 struct symbol *sym;
779 struct stat sb;
780 int res, i, fd;
781
782 name = conf_get_autoconfig_name();
783 conf_read_simple(name, S_DEF_AUTO);
784
785 if (chdir("include/config"))
786 return 1;
787
788 res = 0;
789 for_all_symbols(i, sym) {
790 sym_calc_value(sym);
791 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
792 continue;
793 if (sym->flags & SYMBOL_WRITE) {
794 if (sym->flags & SYMBOL_DEF_AUTO) {
795 /*
796 * symbol has old and new value,
797 * so compare them...
798 */
799 switch (sym->type) {
800 case S_BOOLEAN:
801 case S_TRISTATE:
802 if (sym_get_tristate_value(sym) ==
803 sym->def[S_DEF_AUTO].tri)
804 continue;
805 break;
806 case S_STRING:
807 case S_HEX:
808 case S_INT:
809 if (!strcmp(sym_get_string_value(sym),
810 sym->def[S_DEF_AUTO].val))
811 continue;
812 break;
813 default:
814 break;
815 }
816 } else {
817 /*
818 * If there is no old value, only 'no' (unset)
819 * is allowed as new value.
820 */
821 switch (sym->type) {
822 case S_BOOLEAN:
823 case S_TRISTATE:
824 if (sym_get_tristate_value(sym) == no)
825 continue;
826 break;
827 default:
828 break;
829 }
830 }
831 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
832 /* There is neither an old nor a new value. */
833 continue;
834 /* else
835 * There is an old value, but no new value ('no' (unset)
836 * isn't saved in auto.conf, so the old value is always
837 * different from 'no').
838 */
839
840 /* Replace all '_' and append ".h" */
841 s = sym->name;
842 d = path;
843 while ((c = *s++)) {
844 c = tolower(c);
845 *d++ = (c == '_') ? '/' : c;
846 }
847 strcpy(d, ".h");
848
849 /* Assume directory path already exists. */
850 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
851 if (fd == -1) {
852 if (errno != ENOENT) {
853 res = 1;
854 break;
855 }
856 /*
857 * Create directory components,
858 * unless they exist already.
859 */
860 d = path;
861 while ((d = strchr(d, '/'))) {
862 *d = 0;
863 if (stat(path, &sb) && mkdir(path, 0755)) {
864 res = 1;
865 goto out;
866 }
867 *d++ = '/';
868 }
869 /* Try it again. */
870 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
871 if (fd == -1) {
872 res = 1;
873 break;
874 }
875 }
876 close(fd);
877 }
878 out:
879 if (chdir("../.."))
880 return 1;
881
882 return res;
883 }
884
conf_write_autoconf(void)885 int conf_write_autoconf(void)
886 {
887 struct symbol *sym;
888 const char *name;
889 FILE *out, *tristate, *out_h;
890 int i;
891
892 sym_clear_all_valid();
893
894 file_write_dep("include/config/auto.conf.cmd");
895
896 if (conf_split_config())
897 return 1;
898
899 out = fopen(".tmpconfig", "w");
900 if (!out)
901 return 1;
902
903 tristate = fopen(".tmpconfig_tristate", "w");
904 if (!tristate) {
905 fclose(out);
906 return 1;
907 }
908
909 out_h = fopen(".tmpconfig.h", "w");
910 if (!out_h) {
911 fclose(out);
912 fclose(tristate);
913 return 1;
914 }
915
916 conf_write_heading(out, &kconfig_printer_cb, NULL);
917
918 conf_write_heading(tristate, &tristate_printer_cb, NULL);
919
920 conf_write_heading(out_h, &header_printer_cb, NULL);
921
922 for_all_symbols(i, sym) {
923 sym_calc_value(sym);
924 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
925 continue;
926
927 /* write symbol to auto.conf, tristate and header files */
928 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
929
930 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
931
932 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
933 }
934 fclose(out);
935 fclose(tristate);
936 fclose(out_h);
937
938 name = getenv("KCONFIG_AUTOHEADER");
939 if (!name)
940 name = "include/generated/autoconf.h";
941 if (rename(".tmpconfig.h", name))
942 return 1;
943 name = getenv("KCONFIG_TRISTATE");
944 if (!name)
945 name = "include/config/tristate.conf";
946 if (rename(".tmpconfig_tristate", name))
947 return 1;
948 name = conf_get_autoconfig_name();
949 /*
950 * This must be the last step, kbuild has a dependency on auto.conf
951 * and this marks the successful completion of the previous steps.
952 */
953 if (rename(".tmpconfig", name))
954 return 1;
955
956 return 0;
957 }
958
959 static int sym_change_count;
960 static void (*conf_changed_callback)(void);
961
sym_set_change_count(int count)962 void sym_set_change_count(int count)
963 {
964 int _sym_change_count = sym_change_count;
965 sym_change_count = count;
966 if (conf_changed_callback &&
967 (bool)_sym_change_count != (bool)count)
968 conf_changed_callback();
969 }
970
sym_add_change_count(int count)971 void sym_add_change_count(int count)
972 {
973 sym_set_change_count(count + sym_change_count);
974 }
975
conf_get_changed(void)976 bool conf_get_changed(void)
977 {
978 return sym_change_count;
979 }
980
conf_set_changed_callback(void (* fn)(void))981 void conf_set_changed_callback(void (*fn)(void))
982 {
983 conf_changed_callback = fn;
984 }
985
randomize_choice_values(struct symbol * csym)986 static void randomize_choice_values(struct symbol *csym)
987 {
988 struct property *prop;
989 struct symbol *sym;
990 struct expr *e;
991 int cnt, def;
992
993 /*
994 * If choice is mod then we may have more items selected
995 * and if no then no-one.
996 * In both cases stop.
997 */
998 if (csym->curr.tri != yes)
999 return;
1000
1001 prop = sym_get_choice_prop(csym);
1002
1003 /* count entries in choice block */
1004 cnt = 0;
1005 expr_list_for_each_sym(prop->expr, e, sym)
1006 cnt++;
1007
1008 /*
1009 * find a random value and set it to yes,
1010 * set the rest to no so we have only one set
1011 */
1012 def = (rand() % cnt);
1013
1014 cnt = 0;
1015 expr_list_for_each_sym(prop->expr, e, sym) {
1016 if (def == cnt++) {
1017 sym->def[S_DEF_USER].tri = yes;
1018 csym->def[S_DEF_USER].val = sym;
1019 }
1020 else {
1021 sym->def[S_DEF_USER].tri = no;
1022 }
1023 }
1024 csym->flags |= SYMBOL_DEF_USER;
1025 /* clear VALID to get value calculated */
1026 csym->flags &= ~(SYMBOL_VALID);
1027 }
1028
set_all_choice_values(struct symbol * csym)1029 static void set_all_choice_values(struct symbol *csym)
1030 {
1031 struct property *prop;
1032 struct symbol *sym;
1033 struct expr *e;
1034
1035 prop = sym_get_choice_prop(csym);
1036
1037 /*
1038 * Set all non-assinged choice values to no
1039 */
1040 expr_list_for_each_sym(prop->expr, e, sym) {
1041 if (!sym_has_value(sym))
1042 sym->def[S_DEF_USER].tri = no;
1043 }
1044 csym->flags |= SYMBOL_DEF_USER;
1045 /* clear VALID to get value calculated */
1046 csym->flags &= ~(SYMBOL_VALID);
1047 }
1048
conf_set_all_new_symbols(enum conf_def_mode mode)1049 void conf_set_all_new_symbols(enum conf_def_mode mode)
1050 {
1051 struct symbol *sym, *csym;
1052 int i, cnt;
1053
1054 for_all_symbols(i, sym) {
1055 if (sym_has_value(sym))
1056 continue;
1057 switch (sym_get_type(sym)) {
1058 case S_BOOLEAN:
1059 case S_TRISTATE:
1060 switch (mode) {
1061 case def_yes:
1062 sym->def[S_DEF_USER].tri = yes;
1063 break;
1064 case def_mod:
1065 sym->def[S_DEF_USER].tri = mod;
1066 break;
1067 case def_no:
1068 sym->def[S_DEF_USER].tri = no;
1069 break;
1070 case def_random:
1071 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1072 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1073 break;
1074 default:
1075 continue;
1076 }
1077 if (!(sym_is_choice(sym) && mode == def_random))
1078 sym->flags |= SYMBOL_DEF_USER;
1079 break;
1080 default:
1081 break;
1082 }
1083
1084 }
1085
1086 sym_clear_all_valid();
1087
1088 /*
1089 * We have different type of choice blocks.
1090 * If curr.tri equals to mod then we can select several
1091 * choice symbols in one block.
1092 * In this case we do nothing.
1093 * If curr.tri equals yes then only one symbol can be
1094 * selected in a choice block and we set it to yes,
1095 * and the rest to no.
1096 */
1097 for_all_symbols(i, csym) {
1098 if (sym_has_value(csym) || !sym_is_choice(csym))
1099 continue;
1100
1101 sym_calc_value(csym);
1102 if (mode == def_random)
1103 randomize_choice_values(csym);
1104 else
1105 set_all_choice_values(csym);
1106 }
1107 }
1108