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