1 /*
2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
4 */
5
6 #include <sys/stat.h>
7 #include <ctype.h>
8 #include <errno.h>
9 #include <fcntl.h>
10 #include <stdarg.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <time.h>
15 #include <unistd.h>
16
17 #include "lkc.h"
18
19 struct conf_printer {
20 void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
21 void (*print_comment)(FILE *, const char *, void *);
22 };
23
24 static void conf_warning(const char *fmt, ...)
25 __attribute__ ((format (printf, 1, 2)));
26
27 static void conf_message(const char *fmt, ...)
28 __attribute__ ((format (printf, 1, 2)));
29
30 static const char *conf_filename;
31 static int conf_lineno, conf_warnings, conf_unsaved;
32
33 const char conf_defname[] = "arch/$ARCH/defconfig";
34
conf_warning(const char * fmt,...)35 static void conf_warning(const char *fmt, ...)
36 {
37 va_list ap;
38 va_start(ap, fmt);
39 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
40 vfprintf(stderr, fmt, ap);
41 fprintf(stderr, "\n");
42 va_end(ap);
43 conf_warnings++;
44 }
45
conf_default_message_callback(const char * fmt,va_list ap)46 static void conf_default_message_callback(const char *fmt, va_list ap)
47 {
48 printf("#\n# ");
49 vprintf(fmt, ap);
50 printf("\n#\n");
51 }
52
53 static void (*conf_message_callback) (const char *fmt, va_list ap) =
54 conf_default_message_callback;
conf_set_message_callback(void (* fn)(const char * fmt,va_list ap))55 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
56 {
57 conf_message_callback = fn;
58 }
59
conf_message(const char * fmt,...)60 static void conf_message(const char *fmt, ...)
61 {
62 va_list ap;
63
64 va_start(ap, fmt);
65 if (conf_message_callback)
66 conf_message_callback(fmt, ap);
67 va_end(ap);
68 }
69
conf_get_configname(void)70 const char *conf_get_configname(void)
71 {
72 char *name = getenv("KCONFIG_CONFIG");
73
74 return name ? name : ".config";
75 }
76
conf_get_autoconfig_name(void)77 const char *conf_get_autoconfig_name(void)
78 {
79 char *name = getenv("KCONFIG_AUTOCONFIG");
80
81 return name ? name : "include/config/auto.conf";
82 }
83
conf_expand_value(const char * in)84 static char *conf_expand_value(const char *in)
85 {
86 struct symbol *sym;
87 const char *src;
88 static char res_value[SYMBOL_MAXLENGTH];
89 char *dst, name[SYMBOL_MAXLENGTH];
90
91 res_value[0] = 0;
92 dst = name;
93 while ((src = strchr(in, '$'))) {
94 strncat(res_value, in, src - in);
95 src++;
96 dst = name;
97 while (isalnum(*src) || *src == '_')
98 *dst++ = *src++;
99 *dst = 0;
100 sym = sym_lookup(name, 0);
101 sym_calc_value(sym);
102 strcat(res_value, sym_get_string_value(sym));
103 in = src;
104 }
105 strcat(res_value, in);
106
107 return res_value;
108 }
109
conf_get_default_confname(void)110 char *conf_get_default_confname(void)
111 {
112 struct stat buf;
113 static char fullname[PATH_MAX+1];
114 char *env, *name;
115
116 name = conf_expand_value(conf_defname);
117 env = getenv(SRCTREE);
118 if (env) {
119 sprintf(fullname, "%s/%s", env, name);
120 if (!stat(fullname, &buf))
121 return fullname;
122 }
123 return name;
124 }
125
conf_set_sym_val(struct symbol * sym,int def,int def_flags,char * p)126 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
127 {
128 char *p2;
129
130 switch (sym->type) {
131 case S_TRISTATE:
132 if (p[0] == 'm') {
133 sym->def[def].tri = mod;
134 sym->flags |= def_flags;
135 break;
136 }
137 /* fall through */
138 case S_BOOLEAN:
139 if (p[0] == 'y') {
140 sym->def[def].tri = yes;
141 sym->flags |= def_flags;
142 break;
143 }
144 if (p[0] == 'n' || p[0] == '\0') {
145 sym->def[def].tri = no;
146 sym->flags |= def_flags;
147 break;
148 }
149 if (def != S_DEF_AUTO)
150 conf_warning("symbol value '%s' invalid for %s",
151 p, sym->name);
152 return 1;
153 case S_OTHER:
154 if (*p != '"') {
155 for (p2 = p; *p2 && !isspace(*p2); p2++)
156 ;
157 sym->type = S_STRING;
158 goto done;
159 }
160 /* fall through */
161 case S_STRING:
162 if (*p++ != '"')
163 break;
164 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
165 if (*p2 == '"') {
166 *p2 = 0;
167 break;
168 }
169 memmove(p2, p2 + 1, strlen(p2));
170 }
171 if (!p2) {
172 if (def != S_DEF_AUTO)
173 conf_warning("invalid string found");
174 return 1;
175 }
176 /* fall through */
177 case S_INT:
178 case S_HEX:
179 done:
180 if (sym_string_valid(sym, p)) {
181 sym->def[def].val = strdup(p);
182 sym->flags |= def_flags;
183 } else {
184 if (def != S_DEF_AUTO)
185 conf_warning("symbol value '%s' invalid for %s",
186 p, sym->name);
187 return 1;
188 }
189 break;
190 default:
191 ;
192 }
193 return 0;
194 }
195
196 #define LINE_GROWTH 16
add_byte(int c,char ** lineptr,size_t slen,size_t * n)197 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
198 {
199 char *nline;
200 size_t new_size = slen + 1;
201 if (new_size > *n) {
202 new_size += LINE_GROWTH - 1;
203 new_size *= 2;
204 nline = realloc(*lineptr, new_size);
205 if (!nline)
206 return -1;
207
208 *lineptr = nline;
209 *n = new_size;
210 }
211
212 (*lineptr)[slen] = c;
213
214 return 0;
215 }
216
compat_getline(char ** lineptr,size_t * n,FILE * stream)217 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
218 {
219 char *line = *lineptr;
220 size_t slen = 0;
221
222 for (;;) {
223 int c = getc(stream);
224
225 switch (c) {
226 case '\n':
227 if (add_byte(c, &line, slen, n) < 0)
228 goto e_out;
229 slen++;
230 /* fall through */
231 case EOF:
232 if (add_byte('\0', &line, slen, n) < 0)
233 goto e_out;
234 *lineptr = line;
235 if (slen == 0)
236 return -1;
237 return slen;
238 default:
239 if (add_byte(c, &line, slen, n) < 0)
240 goto e_out;
241 slen++;
242 }
243 }
244
245 e_out:
246 line[slen-1] = '\0';
247 *lineptr = line;
248 return -1;
249 }
250
conf_read_simple(const char * name,int def)251 int conf_read_simple(const char *name, int def)
252 {
253 FILE *in = NULL;
254 char *line = NULL;
255 size_t line_asize = 0;
256 char *p, *p2;
257 struct symbol *sym;
258 int i, def_flags;
259
260 if (name) {
261 in = zconf_fopen(name);
262 } else {
263 struct property *prop;
264
265 name = conf_get_configname();
266 in = zconf_fopen(name);
267 if (in)
268 goto load;
269 sym_add_change_count(1);
270 if (!sym_defconfig_list)
271 return 1;
272
273 for_all_defaults(sym_defconfig_list, prop) {
274 if (expr_calc_value(prop->visible.expr) == no ||
275 prop->expr->type != E_SYMBOL)
276 continue;
277 name = conf_expand_value(prop->expr->left.sym->name);
278 in = zconf_fopen(name);
279 if (in) {
280 conf_message(_("using defaults found in %s"),
281 name);
282 goto load;
283 }
284 }
285 }
286 if (!in)
287 return 1;
288
289 load:
290 conf_filename = name;
291 conf_lineno = 0;
292 conf_warnings = 0;
293 conf_unsaved = 0;
294
295 def_flags = SYMBOL_DEF << def;
296 for_all_symbols(i, sym) {
297 sym->flags |= SYMBOL_CHANGED;
298 sym->flags &= ~(def_flags|SYMBOL_VALID);
299 if (sym_is_choice(sym))
300 sym->flags |= def_flags;
301 switch (sym->type) {
302 case S_INT:
303 case S_HEX:
304 case S_STRING:
305 if (sym->def[def].val)
306 free(sym->def[def].val);
307 /* fall through */
308 default:
309 sym->def[def].val = NULL;
310 sym->def[def].tri = no;
311 }
312 }
313
314 while (compat_getline(&line, &line_asize, in) != -1) {
315 conf_lineno++;
316 sym = NULL;
317 if (line[0] == '#') {
318 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
319 continue;
320 p = strchr(line + 2 + strlen(CONFIG_), ' ');
321 if (!p)
322 continue;
323 *p++ = 0;
324 if (strncmp(p, "is not set", 10))
325 continue;
326 if (def == S_DEF_USER) {
327 sym = sym_find(line + 2 + strlen(CONFIG_));
328 if (!sym) {
329 sym_add_change_count(1);
330 goto setsym;
331 }
332 } else {
333 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
334 if (sym->type == S_UNKNOWN)
335 sym->type = S_BOOLEAN;
336 }
337 if (sym->flags & def_flags) {
338 conf_warning("override: reassigning to symbol %s", sym->name);
339 }
340 switch (sym->type) {
341 case S_BOOLEAN:
342 case S_TRISTATE:
343 sym->def[def].tri = no;
344 sym->flags |= def_flags;
345 break;
346 default:
347 ;
348 }
349 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
350 p = strchr(line + strlen(CONFIG_), '=');
351 if (!p)
352 continue;
353 *p++ = 0;
354 p2 = strchr(p, '\n');
355 if (p2) {
356 *p2-- = 0;
357 if (*p2 == '\r')
358 *p2 = 0;
359 }
360 if (def == S_DEF_USER) {
361 sym = sym_find(line + strlen(CONFIG_));
362 if (!sym) {
363 sym_add_change_count(1);
364 goto setsym;
365 }
366 } else {
367 sym = sym_lookup(line + strlen(CONFIG_), 0);
368 if (sym->type == S_UNKNOWN)
369 sym->type = S_OTHER;
370 }
371 if (sym->flags & def_flags) {
372 conf_warning("override: reassigning to symbol %s", sym->name);
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 return 0;
405 }
406
conf_read(const char * name)407 int conf_read(const char *name)
408 {
409 struct symbol *sym;
410 int i;
411
412 sym_set_change_count(0);
413
414 if (conf_read_simple(name, S_DEF_USER)) {
415 sym_calc_value(modules_sym);
416 return 1;
417 }
418
419 sym_calc_value(modules_sym);
420
421 for_all_symbols(i, sym) {
422 sym_calc_value(sym);
423 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
424 continue;
425 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
426 /* check that calculated value agrees with saved value */
427 switch (sym->type) {
428 case S_BOOLEAN:
429 case S_TRISTATE:
430 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
431 break;
432 if (!sym_is_choice(sym))
433 continue;
434 /* fall through */
435 default:
436 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
437 continue;
438 break;
439 }
440 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
441 /* no previous value and not saved */
442 continue;
443 conf_unsaved++;
444 /* maybe print value in verbose mode... */
445 }
446
447 for_all_symbols(i, sym) {
448 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
449 /* Reset values of generates values, so they'll appear
450 * as new, if they should become visible, but that
451 * doesn't quite work if the Kconfig and the saved
452 * configuration disagree.
453 */
454 if (sym->visible == no && !conf_unsaved)
455 sym->flags &= ~SYMBOL_DEF_USER;
456 switch (sym->type) {
457 case S_STRING:
458 case S_INT:
459 case S_HEX:
460 /* Reset a string value if it's out of range */
461 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
462 break;
463 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
464 conf_unsaved++;
465 break;
466 default:
467 break;
468 }
469 }
470 }
471
472 sym_add_change_count(conf_warnings || conf_unsaved);
473
474 return 0;
475 }
476
477 /*
478 * Kconfig configuration printer
479 *
480 * This printer is used when generating the resulting configuration after
481 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
482 * passing a non-NULL argument to the printer.
483 *
484 */
485 static void
kconfig_print_symbol(FILE * fp,struct symbol * sym,const char * value,void * arg)486 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
487 {
488
489 switch (sym->type) {
490 case S_BOOLEAN:
491 case S_TRISTATE:
492 break;
493 default:
494 break;
495 }
496
497 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
498 }
499
500 static void
kconfig_print_comment(FILE * fp,const char * value,void * arg)501 kconfig_print_comment(FILE *fp, const char *value, void *arg)
502 {
503 const char *p = value;
504 size_t l;
505
506 for (;;) {
507 l = strcspn(p, "\n");
508 fprintf(fp, "#");
509 if (l) {
510 fprintf(fp, " ");
511 xfwrite(p, l, 1, fp);
512 p += l;
513 }
514 fprintf(fp, "\n");
515 if (*p++ == '\0')
516 break;
517 }
518 }
519
520 static struct conf_printer kconfig_printer_cb =
521 {
522 .print_symbol = kconfig_print_symbol,
523 .print_comment = kconfig_print_comment,
524 };
525
526 /*
527 * Header printer
528 *
529 * This printer is used when generating the `include/generated/autoconf.h' file.
530 */
531 static void
header_print_symbol(FILE * fp,struct symbol * sym,const char * value,void * arg)532 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
533 {
534
535 switch (sym->type) {
536 case S_BOOLEAN:
537 case S_TRISTATE: {
538 const char *suffix = "";
539
540 switch (*value) {
541 case 'n':
542 break;
543 case 'm':
544 suffix = "_MODULE";
545 /* fall through */
546 default:
547 fprintf(fp, "#define %s%s%s 1\n",
548 CONFIG_, sym->name, suffix);
549 }
550 break;
551 }
552 case S_HEX: {
553 const char *prefix = "";
554
555 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
556 prefix = "0x";
557 fprintf(fp, "#define %s%s %s%s\n",
558 CONFIG_, sym->name, prefix, value);
559 break;
560 }
561 case S_STRING:
562 case S_INT:
563 fprintf(fp, "#define %s%s %s\n",
564 CONFIG_, sym->name, value);
565 break;
566 default:
567 break;
568 }
569
570 }
571
572 static void
header_print_comment(FILE * fp,const char * value,void * arg)573 header_print_comment(FILE *fp, const char *value, void *arg)
574 {
575 const char *p = value;
576 size_t l;
577
578 fprintf(fp, "/*\n");
579 for (;;) {
580 l = strcspn(p, "\n");
581 fprintf(fp, " *");
582 if (l) {
583 fprintf(fp, " ");
584 xfwrite(p, l, 1, fp);
585 p += l;
586 }
587 fprintf(fp, "\n");
588 if (*p++ == '\0')
589 break;
590 }
591 fprintf(fp, " */\n");
592 }
593
594 static struct conf_printer header_printer_cb =
595 {
596 .print_symbol = header_print_symbol,
597 .print_comment = header_print_comment,
598 };
599
600 /*
601 * Tristate printer
602 *
603 * This printer is used when generating the `include/config/tristate.conf' file.
604 */
605 static void
tristate_print_symbol(FILE * fp,struct symbol * sym,const char * value,void * arg)606 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
607 {
608
609 if (sym->type == S_TRISTATE && *value != 'n')
610 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
611 }
612
613 static struct conf_printer tristate_printer_cb =
614 {
615 .print_symbol = tristate_print_symbol,
616 .print_comment = kconfig_print_comment,
617 };
618
conf_write_symbol(FILE * fp,struct symbol * sym,struct conf_printer * printer,void * printer_arg)619 static void conf_write_symbol(FILE *fp, struct symbol *sym,
620 struct conf_printer *printer, void *printer_arg)
621 {
622 const char *str;
623
624 switch (sym->type) {
625 case S_OTHER:
626 case S_UNKNOWN:
627 break;
628 case S_STRING:
629 str = sym_get_string_value(sym);
630 str = sym_escape_string_value(str);
631 printer->print_symbol(fp, sym, str, printer_arg);
632 free((void *)str);
633 break;
634 default:
635 str = sym_get_string_value(sym);
636 printer->print_symbol(fp, sym, str, printer_arg);
637 }
638 }
639
640 static void
conf_write_heading(FILE * fp,struct conf_printer * printer,void * printer_arg)641 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
642 {
643 char buf[256];
644
645 snprintf(buf, sizeof(buf),
646 "\n"
647 "Automatically generated file; DO NOT EDIT.\n"
648 "%s\n",
649 rootmenu.prompt->text);
650
651 printer->print_comment(fp, buf, printer_arg);
652 }
653
654 /*
655 * Write out a minimal config.
656 * All values that has default values are skipped as this is redundant.
657 */
conf_write_defconfig(const char * filename)658 int conf_write_defconfig(const char *filename)
659 {
660 struct symbol *sym;
661 struct menu *menu;
662 FILE *out;
663
664 out = fopen(filename, "w");
665 if (!out)
666 return 1;
667
668 sym_clear_all_valid();
669
670 /* Traverse all menus to find all relevant symbols */
671 menu = rootmenu.list;
672
673 while (menu != NULL)
674 {
675 sym = menu->sym;
676 if (sym == NULL) {
677 if (!menu_is_visible(menu))
678 goto next_menu;
679 } else if (!sym_is_choice(sym)) {
680 sym_calc_value(sym);
681 if (!(sym->flags & SYMBOL_WRITE))
682 goto next_menu;
683 sym->flags &= ~SYMBOL_WRITE;
684 /* If we cannot change the symbol - skip */
685 if (!sym_is_changable(sym))
686 goto next_menu;
687 /* If symbol equals to default value - skip */
688 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
689 goto next_menu;
690
691 /*
692 * If symbol is a choice value and equals to the
693 * default for a choice - skip.
694 * But only if value is bool and equal to "y" and
695 * choice is not "optional".
696 * (If choice is "optional" then all values can be "n")
697 */
698 if (sym_is_choice_value(sym)) {
699 struct symbol *cs;
700 struct symbol *ds;
701
702 cs = prop_get_symbol(sym_get_choice_prop(sym));
703 ds = sym_choice_default(cs);
704 if (!sym_is_optional(cs) && sym == ds) {
705 if ((sym->type == S_BOOLEAN) &&
706 sym_get_tristate_value(sym) == yes)
707 goto next_menu;
708 }
709 }
710 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
711 }
712 next_menu:
713 if (menu->list != NULL) {
714 menu = menu->list;
715 }
716 else if (menu->next != NULL) {
717 menu = menu->next;
718 } else {
719 while ((menu = menu->parent)) {
720 if (menu->next != NULL) {
721 menu = menu->next;
722 break;
723 }
724 }
725 }
726 }
727 fclose(out);
728 return 0;
729 }
730
conf_write(const char * name)731 int conf_write(const char *name)
732 {
733 FILE *out;
734 struct symbol *sym;
735 struct menu *menu;
736 const char *basename;
737 const char *str;
738 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
739 char *env;
740
741 dirname[0] = 0;
742 if (name && name[0]) {
743 struct stat st;
744 char *slash;
745
746 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
747 strcpy(dirname, name);
748 strcat(dirname, "/");
749 basename = conf_get_configname();
750 } else if ((slash = strrchr(name, '/'))) {
751 int size = slash - name + 1;
752 memcpy(dirname, name, size);
753 dirname[size] = 0;
754 if (slash[1])
755 basename = slash + 1;
756 else
757 basename = conf_get_configname();
758 } else
759 basename = name;
760 } else
761 basename = conf_get_configname();
762
763 sprintf(newname, "%s%s", dirname, basename);
764 env = getenv("KCONFIG_OVERWRITECONFIG");
765 if (!env || !*env) {
766 sprintf(tmpname, "%s.tmpconfig.%d", newname, (int)getpid());
767 out = fopen(tmpname, "w");
768 } else {
769 *tmpname = 0;
770 out = fopen(newname, "w");
771 }
772 if (!out)
773 return 1;
774
775 conf_write_heading(out, &kconfig_printer_cb, NULL);
776
777 if (!conf_get_changed())
778 sym_clear_all_valid();
779
780 menu = rootmenu.list;
781 while (menu) {
782 sym = menu->sym;
783 if (!sym) {
784 if (!menu_is_visible(menu))
785 goto next;
786 str = menu_get_prompt(menu);
787 fprintf(out, "\n"
788 "#\n"
789 "# %s\n"
790 "#\n", str);
791 } else if (!(sym->flags & SYMBOL_CHOICE)) {
792 sym_calc_value(sym);
793 if (!(sym->flags & SYMBOL_WRITE))
794 goto next;
795 sym->flags &= ~SYMBOL_WRITE;
796
797 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
798 }
799
800 next:
801 if (menu->list) {
802 menu = menu->list;
803 continue;
804 }
805 if (menu->next)
806 menu = menu->next;
807 else while ((menu = menu->parent)) {
808 if (menu->next) {
809 menu = menu->next;
810 break;
811 }
812 }
813 }
814 fclose(out);
815
816 if (*tmpname) {
817 strcat(dirname, basename);
818 strcat(dirname, ".old");
819 rename(newname, dirname);
820 if (rename(tmpname, newname))
821 return 1;
822 }
823
824 conf_message(_("configuration written to %s"), newname);
825
826 sym_set_change_count(0);
827
828 return 0;
829 }
830
conf_write_autoconf(void)831 int conf_write_autoconf(void)
832 {
833 struct symbol *sym;
834 const char *name;
835 FILE *out, *tristate, *out_h;
836 int i;
837
838 sym_clear_all_valid();
839
840 file_write_dep("include/config/auto.conf.cmd");
841
842 out = fopen(".tmpconfig", "w");
843 if (!out)
844 return 1;
845
846 tristate = fopen(".tmpconfig_tristate", "w");
847 if (!tristate) {
848 fclose(out);
849 return 1;
850 }
851
852 out_h = fopen(".tmpconfig.h", "w");
853 if (!out_h) {
854 fclose(out);
855 fclose(tristate);
856 return 1;
857 }
858
859 conf_write_heading(out, &kconfig_printer_cb, NULL);
860
861 conf_write_heading(tristate, &tristate_printer_cb, NULL);
862
863 conf_write_heading(out_h, &header_printer_cb, NULL);
864
865 /* write symbols to auto.conf, tristate and header files */
866 for_all_symbols(i, sym) {
867 if (!sym->name) continue;
868 if ((sym->flags & SYMBOL_WRITE) ||
869 /*
870 * If the symbol is disabled by dependency we still want it in auto.conf
871 * so that all possible variables are always defined.
872 */
873 (sym->dir_dep.expr != NULL && sym->dir_dep.tri == no)) {
874 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
875 }
876 if (sym->flags & SYMBOL_WRITE) {
877 conf_write_symbol(tristate, sym, &tristate_printer_cb, NULL);
878 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
879 }
880 }
881 fclose(out);
882 fclose(tristate);
883 fclose(out_h);
884
885 name = getenv("KCONFIG_AUTOHEADER");
886 if (!name)
887 name = "include/generated/autoconf.h";
888 if (rename(".tmpconfig.h", name))
889 return 1;
890 name = getenv("KCONFIG_TRISTATE");
891 if (!name)
892 name = "include/config/tristate.conf";
893 if (rename(".tmpconfig_tristate", name))
894 return 1;
895 name = conf_get_autoconfig_name();
896 /*
897 * This must be the last step, kbuild has a dependency on auto.conf
898 * and this marks the successful completion of the previous steps.
899 */
900 if (rename(".tmpconfig", name))
901 return 1;
902
903 return 0;
904 }
905
906 static int sym_change_count;
907 static void (*conf_changed_callback)(void);
908
sym_set_change_count(int count)909 void sym_set_change_count(int count)
910 {
911 int _sym_change_count = sym_change_count;
912 sym_change_count = count;
913 if (conf_changed_callback &&
914 (bool)_sym_change_count != (bool)count)
915 conf_changed_callback();
916 }
917
sym_add_change_count(int count)918 void sym_add_change_count(int count)
919 {
920 sym_set_change_count(count + sym_change_count);
921 }
922
conf_get_changed(void)923 bool conf_get_changed(void)
924 {
925 return sym_change_count;
926 }
927
conf_set_changed_callback(void (* fn)(void))928 void conf_set_changed_callback(void (*fn)(void))
929 {
930 conf_changed_callback = fn;
931 }
932
randomize_choice_values(struct symbol * csym)933 static bool randomize_choice_values(struct symbol *csym)
934 {
935 struct property *prop;
936 struct symbol *sym;
937 struct expr *e;
938 int cnt, def;
939
940 /*
941 * If choice is mod then we may have more items selected
942 * and if no then no-one.
943 * In both cases stop.
944 */
945 if (csym->curr.tri != yes)
946 return false;
947
948 prop = sym_get_choice_prop(csym);
949
950 /* count entries in choice block */
951 cnt = 0;
952 expr_list_for_each_sym(prop->expr, e, sym)
953 cnt++;
954
955 /*
956 * find a random value and set it to yes,
957 * set the rest to no so we have only one set
958 */
959 def = (rand() % cnt);
960
961 cnt = 0;
962 expr_list_for_each_sym(prop->expr, e, sym) {
963 if (def == cnt++) {
964 sym->def[S_DEF_USER].tri = yes;
965 csym->def[S_DEF_USER].val = sym;
966 }
967 else {
968 sym->def[S_DEF_USER].tri = no;
969 }
970 sym->flags |= SYMBOL_DEF_USER;
971 /* clear VALID to get value calculated */
972 sym->flags &= ~SYMBOL_VALID;
973 }
974 csym->flags |= SYMBOL_DEF_USER;
975 /* clear VALID to get value calculated */
976 csym->flags &= ~(SYMBOL_VALID);
977
978 return true;
979 }
980
set_all_choice_values(struct symbol * csym)981 void set_all_choice_values(struct symbol *csym)
982 {
983 struct property *prop;
984 struct symbol *sym;
985 struct expr *e;
986
987 prop = sym_get_choice_prop(csym);
988
989 /*
990 * Set all non-assinged choice values to no
991 */
992 expr_list_for_each_sym(prop->expr, e, sym) {
993 if (!sym_has_value(sym))
994 sym->def[S_DEF_USER].tri = no;
995 }
996 csym->flags |= SYMBOL_DEF_USER;
997 /* clear VALID to get value calculated */
998 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
999 }
1000
conf_set_all_new_symbols(enum conf_def_mode mode)1001 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1002 {
1003 struct symbol *sym, *csym;
1004 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y
1005 * pty: probability of tristate = y
1006 * ptm: probability of tristate = m
1007 */
1008
1009 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1010 * below, otherwise gcc whines about
1011 * -Wmaybe-uninitialized */
1012 if (mode == def_random) {
1013 int n, p[3];
1014 char *env = getenv("KCONFIG_PROBABILITY");
1015 n = 0;
1016 while( env && *env ) {
1017 char *endp;
1018 int tmp = strtol( env, &endp, 10 );
1019 if( tmp >= 0 && tmp <= 100 ) {
1020 p[n++] = tmp;
1021 } else {
1022 errno = ERANGE;
1023 perror( "KCONFIG_PROBABILITY" );
1024 exit( 1 );
1025 }
1026 env = (*endp == ':') ? endp+1 : endp;
1027 if( n >=3 ) {
1028 break;
1029 }
1030 }
1031 switch( n ) {
1032 case 1:
1033 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1034 break;
1035 case 2:
1036 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1037 break;
1038 case 3:
1039 pby = p[0]; pty = p[1]; ptm = p[2];
1040 break;
1041 }
1042
1043 if( pty+ptm > 100 ) {
1044 errno = ERANGE;
1045 perror( "KCONFIG_PROBABILITY" );
1046 exit( 1 );
1047 }
1048 }
1049 bool has_changed = false;
1050
1051 for_all_symbols(i, sym) {
1052 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1053 continue;
1054 switch (sym_get_type(sym)) {
1055 case S_BOOLEAN:
1056 case S_TRISTATE:
1057 has_changed = true;
1058 switch (mode) {
1059 case def_yes:
1060 sym->def[S_DEF_USER].tri = yes;
1061 break;
1062 case def_mod:
1063 sym->def[S_DEF_USER].tri = mod;
1064 break;
1065 case def_no:
1066 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1067 sym->def[S_DEF_USER].tri = yes;
1068 else
1069 sym->def[S_DEF_USER].tri = no;
1070 break;
1071 case def_random:
1072 sym->def[S_DEF_USER].tri = no;
1073 cnt = rand() % 100;
1074 if (sym->type == S_TRISTATE) {
1075 if (cnt < pty)
1076 sym->def[S_DEF_USER].tri = yes;
1077 else if (cnt < (pty+ptm))
1078 sym->def[S_DEF_USER].tri = mod;
1079 } else if (cnt < pby)
1080 sym->def[S_DEF_USER].tri = yes;
1081 break;
1082 default:
1083 continue;
1084 }
1085 if (!(sym_is_choice(sym) && mode == def_random))
1086 sym->flags |= SYMBOL_DEF_USER;
1087 break;
1088 default:
1089 break;
1090 }
1091
1092 }
1093
1094 sym_clear_all_valid();
1095
1096 /*
1097 * We have different type of choice blocks.
1098 * If curr.tri equals to mod then we can select several
1099 * choice symbols in one block.
1100 * In this case we do nothing.
1101 * If curr.tri equals yes then only one symbol can be
1102 * selected in a choice block and we set it to yes,
1103 * and the rest to no.
1104 */
1105 if (mode != def_random) {
1106 for_all_symbols(i, csym) {
1107 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1108 sym_is_choice_value(csym))
1109 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1110 }
1111 }
1112
1113 for_all_symbols(i, csym) {
1114 if (sym_has_value(csym) || !sym_is_choice(csym))
1115 continue;
1116
1117 sym_calc_value(csym);
1118 if (mode == def_random)
1119 has_changed = randomize_choice_values(csym);
1120 else {
1121 set_all_choice_values(csym);
1122 has_changed = true;
1123 }
1124 }
1125
1126 return has_changed;
1127 }
1128
