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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// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
4 */
5
6#include <sys/mman.h>
7#include <sys/stat.h>
8#include <sys/types.h>
9#include <ctype.h>
10#include <errno.h>
11#include <fcntl.h>
12#include <limits.h>
13#include <stdarg.h>
14#include <stdio.h>
15#include <stdlib.h>
16#include <string.h>
17#include <time.h>
18#include <unistd.h>
19
20#include "lkc.h"
21
22/* return true if 'path' exists, false otherwise */
23static bool is_present(const char *path)
24{
25 struct stat st;
26
27 return !stat(path, &st);
28}
29
30/* return true if 'path' exists and it is a directory, false otherwise */
31static bool is_dir(const char *path)
32{
33 struct stat st;
34
35 if (stat(path, &st))
36 return false;
37
38 return S_ISDIR(st.st_mode);
39}
40
41/* return true if the given two files are the same, false otherwise */
42static bool is_same(const char *file1, const char *file2)
43{
44 int fd1, fd2;
45 struct stat st1, st2;
46 void *map1, *map2;
47 bool ret = false;
48
49 fd1 = open(file1, O_RDONLY);
50 if (fd1 < 0)
51 return ret;
52
53 fd2 = open(file2, O_RDONLY);
54 if (fd2 < 0)
55 goto close1;
56
57 ret = fstat(fd1, &st1);
58 if (ret)
59 goto close2;
60 ret = fstat(fd2, &st2);
61 if (ret)
62 goto close2;
63
64 if (st1.st_size != st2.st_size)
65 goto close2;
66
67 map1 = mmap(NULL, st1.st_size, PROT_READ, MAP_PRIVATE, fd1, 0);
68 if (map1 == MAP_FAILED)
69 goto close2;
70
71 map2 = mmap(NULL, st2.st_size, PROT_READ, MAP_PRIVATE, fd2, 0);
72 if (map2 == MAP_FAILED)
73 goto close2;
74
75 if (bcmp(map1, map2, st1.st_size))
76 goto close2;
77
78 ret = true;
79close2:
80 close(fd2);
81close1:
82 close(fd1);
83
84 return ret;
85}
86
87/*
88 * Create the parent directory of the given path.
89 *
90 * For example, if 'include/config/auto.conf' is given, create 'include/config'.
91 */
92static int make_parent_dir(const char *path)
93{
94 char tmp[PATH_MAX + 1];
95 char *p;
96
97 strncpy(tmp, path, sizeof(tmp));
98 tmp[sizeof(tmp) - 1] = 0;
99
100 /* Remove the base name. Just return if nothing is left */
101 p = strrchr(tmp, '/');
102 if (!p)
103 return 0;
104 *(p + 1) = 0;
105
106 /* Just in case it is an absolute path */
107 p = tmp;
108 while (*p == '/')
109 p++;
110
111 while ((p = strchr(p, '/'))) {
112 *p = 0;
113
114 /* skip if the directory exists */
115 if (!is_dir(tmp) && mkdir(tmp, 0755))
116 return -1;
117
118 *p = '/';
119 while (*p == '/')
120 p++;
121 }
122
123 return 0;
124}
125
126static char depfile_path[PATH_MAX];
127static size_t depfile_prefix_len;
128
129/* touch depfile for symbol 'name' */
130static int conf_touch_dep(const char *name)
131{
132 int fd, ret;
133 char *d;
134
135 /* check overflow: prefix + name + '\0' must fit in buffer. */
136 if (depfile_prefix_len + strlen(name) + 1 > sizeof(depfile_path))
137 return -1;
138
139 d = depfile_path + depfile_prefix_len;
140 strcpy(d, name);
141
142 /* Assume directory path already exists. */
143 fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
144 if (fd == -1) {
145 if (errno != ENOENT)
146 return -1;
147
148 ret = make_parent_dir(depfile_path);
149 if (ret)
150 return ret;
151
152 /* Try it again. */
153 fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
154 if (fd == -1)
155 return -1;
156 }
157 close(fd);
158
159 return 0;
160}
161
162struct conf_printer {
163 void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
164 void (*print_comment)(FILE *, const char *, void *);
165};
166
167static void conf_warning(const char *fmt, ...)
168 __attribute__ ((format (printf, 1, 2)));
169
170static void conf_message(const char *fmt, ...)
171 __attribute__ ((format (printf, 1, 2)));
172
173static const char *conf_filename;
174static int conf_lineno, conf_warnings;
175
176static void conf_warning(const char *fmt, ...)
177{
178 va_list ap;
179 va_start(ap, fmt);
180 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
181 vfprintf(stderr, fmt, ap);
182 fprintf(stderr, "\n");
183 va_end(ap);
184 conf_warnings++;
185}
186
187static void conf_default_message_callback(const char *s)
188{
189 printf("#\n# ");
190 printf("%s", s);
191 printf("\n#\n");
192}
193
194static void (*conf_message_callback)(const char *s) =
195 conf_default_message_callback;
196void conf_set_message_callback(void (*fn)(const char *s))
197{
198 conf_message_callback = fn;
199}
200
201static void conf_message(const char *fmt, ...)
202{
203 va_list ap;
204 char buf[4096];
205
206 if (!conf_message_callback)
207 return;
208
209 va_start(ap, fmt);
210
211 vsnprintf(buf, sizeof(buf), fmt, ap);
212 conf_message_callback(buf);
213 va_end(ap);
214}
215
216const char *conf_get_configname(void)
217{
218 char *name = getenv("KCONFIG_CONFIG");
219
220 return name ? name : ".config";
221}
222
223static const char *conf_get_autoconfig_name(void)
224{
225 char *name = getenv("KCONFIG_AUTOCONFIG");
226
227 return name ? name : "include/config/auto.conf";
228}
229
230static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
231{
232 char *p2;
233
234 switch (sym->type) {
235 case S_TRISTATE:
236 if (p[0] == 'm') {
237 sym->def[def].tri = mod;
238 sym->flags |= def_flags;
239 break;
240 }
241 /* fall through */
242 case S_BOOLEAN:
243 if (p[0] == 'y') {
244 sym->def[def].tri = yes;
245 sym->flags |= def_flags;
246 break;
247 }
248 if (p[0] == 'n') {
249 sym->def[def].tri = no;
250 sym->flags |= def_flags;
251 break;
252 }
253 if (def != S_DEF_AUTO)
254 conf_warning("symbol value '%s' invalid for %s",
255 p, sym->name);
256 return 1;
257 case S_STRING:
258 if (*p++ != '"')
259 break;
260 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
261 if (*p2 == '"') {
262 *p2 = 0;
263 break;
264 }
265 memmove(p2, p2 + 1, strlen(p2));
266 }
267 if (!p2) {
268 if (def != S_DEF_AUTO)
269 conf_warning("invalid string found");
270 return 1;
271 }
272 /* fall through */
273 case S_INT:
274 case S_HEX:
275 if (sym_string_valid(sym, p)) {
276 sym->def[def].val = xstrdup(p);
277 sym->flags |= def_flags;
278 } else {
279 if (def != S_DEF_AUTO)
280 conf_warning("symbol value '%s' invalid for %s",
281 p, sym->name);
282 return 1;
283 }
284 break;
285 default:
286 ;
287 }
288 return 0;
289}
290
291#define LINE_GROWTH 16
292static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
293{
294 char *nline;
295 size_t new_size = slen + 1;
296 if (new_size > *n) {
297 new_size += LINE_GROWTH - 1;
298 new_size *= 2;
299 nline = xrealloc(*lineptr, new_size);
300 if (!nline)
301 return -1;
302
303 *lineptr = nline;
304 *n = new_size;
305 }
306
307 (*lineptr)[slen] = c;
308
309 return 0;
310}
311
312static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
313{
314 char *line = *lineptr;
315 size_t slen = 0;
316
317 for (;;) {
318 int c = getc(stream);
319
320 switch (c) {
321 case '\n':
322 if (add_byte(c, &line, slen, n) < 0)
323 goto e_out;
324 slen++;
325 /* fall through */
326 case EOF:
327 if (add_byte('\0', &line, slen, n) < 0)
328 goto e_out;
329 *lineptr = line;
330 if (slen == 0)
331 return -1;
332 return slen;
333 default:
334 if (add_byte(c, &line, slen, n) < 0)
335 goto e_out;
336 slen++;
337 }
338 }
339
340e_out:
341 line[slen-1] = '\0';
342 *lineptr = line;
343 return -1;
344}
345
346int conf_read_simple(const char *name, int def)
347{
348 FILE *in = NULL;
349 char *line = NULL;
350 size_t line_asize = 0;
351 char *p, *p2;
352 struct symbol *sym;
353 int i, def_flags;
354
355 if (name) {
356 in = zconf_fopen(name);
357 } else {
358 char *env;
359
360 name = conf_get_configname();
361 in = zconf_fopen(name);
362 if (in)
363 goto load;
364 conf_set_changed(true);
365
366 env = getenv("KCONFIG_DEFCONFIG_LIST");
367 if (!env)
368 return 1;
369
370 while (1) {
371 bool is_last;
372
373 while (isspace(*env))
374 env++;
375
376 if (!*env)
377 break;
378
379 p = env;
380 while (*p && !isspace(*p))
381 p++;
382
383 is_last = (*p == '\0');
384
385 *p = '\0';
386
387 in = zconf_fopen(env);
388 if (in) {
389 conf_message("using defaults found in %s",
390 env);
391 goto load;
392 }
393
394 if (is_last)
395 break;
396
397 env = p + 1;
398 }
399 }
400 if (!in)
401 return 1;
402
403load:
404 conf_filename = name;
405 conf_lineno = 0;
406 conf_warnings = 0;
407
408 def_flags = SYMBOL_DEF << def;
409 for_all_symbols(i, sym) {
410 sym->flags |= SYMBOL_CHANGED;
411 sym->flags &= ~(def_flags|SYMBOL_VALID);
412 if (sym_is_choice(sym))
413 sym->flags |= def_flags;
414 switch (sym->type) {
415 case S_INT:
416 case S_HEX:
417 case S_STRING:
418 if (sym->def[def].val)
419 free(sym->def[def].val);
420 /* fall through */
421 default:
422 sym->def[def].val = NULL;
423 sym->def[def].tri = no;
424 }
425 }
426
427 while (compat_getline(&line, &line_asize, in) != -1) {
428 conf_lineno++;
429 sym = NULL;
430 if (line[0] == '#') {
431 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
432 continue;
433 p = strchr(line + 2 + strlen(CONFIG_), ' ');
434 if (!p)
435 continue;
436 *p++ = 0;
437 if (strncmp(p, "is not set", 10))
438 continue;
439 if (def == S_DEF_USER) {
440 sym = sym_find(line + 2 + strlen(CONFIG_));
441 if (!sym) {
442 conf_set_changed(true);
443 continue;
444 }
445 } else {
446 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
447 if (sym->type == S_UNKNOWN)
448 sym->type = S_BOOLEAN;
449 }
450 if (sym->flags & def_flags) {
451 conf_warning("override: reassigning to symbol %s", sym->name);
452 }
453 switch (sym->type) {
454 case S_BOOLEAN:
455 case S_TRISTATE:
456 sym->def[def].tri = no;
457 sym->flags |= def_flags;
458 break;
459 default:
460 ;
461 }
462 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
463 p = strchr(line + strlen(CONFIG_), '=');
464 if (!p)
465 continue;
466 *p++ = 0;
467 p2 = strchr(p, '\n');
468 if (p2) {
469 *p2-- = 0;
470 if (*p2 == '\r')
471 *p2 = 0;
472 }
473
474 sym = sym_find(line + strlen(CONFIG_));
475 if (!sym) {
476 if (def == S_DEF_AUTO)
477 /*
478 * Reading from include/config/auto.conf
479 * If CONFIG_FOO previously existed in
480 * auto.conf but it is missing now,
481 * include/config/FOO must be touched.
482 */
483 conf_touch_dep(line + strlen(CONFIG_));
484 else
485 conf_set_changed(true);
486 continue;
487 }
488
489 if (sym->flags & def_flags) {
490 conf_warning("override: reassigning to symbol %s", sym->name);
491 }
492 if (conf_set_sym_val(sym, def, def_flags, p))
493 continue;
494 } else {
495 if (line[0] != '\r' && line[0] != '\n')
496 conf_warning("unexpected data: %.*s",
497 (int)strcspn(line, "\r\n"), line);
498
499 continue;
500 }
501
502 if (sym && sym_is_choice_value(sym)) {
503 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
504 switch (sym->def[def].tri) {
505 case no:
506 break;
507 case mod:
508 if (cs->def[def].tri == yes) {
509 conf_warning("%s creates inconsistent choice state", sym->name);
510 cs->flags &= ~def_flags;
511 }
512 break;
513 case yes:
514 if (cs->def[def].tri != no)
515 conf_warning("override: %s changes choice state", sym->name);
516 cs->def[def].val = sym;
517 break;
518 }
519 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
520 }
521 }
522 free(line);
523 fclose(in);
524 return 0;
525}
526
527int conf_read(const char *name)
528{
529 struct symbol *sym;
530 int conf_unsaved = 0;
531 int i;
532
533 conf_set_changed(false);
534
535 if (conf_read_simple(name, S_DEF_USER)) {
536 sym_calc_value(modules_sym);
537 return 1;
538 }
539
540 sym_calc_value(modules_sym);
541
542 for_all_symbols(i, sym) {
543 sym_calc_value(sym);
544 if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
545 continue;
546 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
547 /* check that calculated value agrees with saved value */
548 switch (sym->type) {
549 case S_BOOLEAN:
550 case S_TRISTATE:
551 if (sym->def[S_DEF_USER].tri == sym_get_tristate_value(sym))
552 continue;
553 break;
554 default:
555 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
556 continue;
557 break;
558 }
559 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
560 /* no previous value and not saved */
561 continue;
562 conf_unsaved++;
563 /* maybe print value in verbose mode... */
564 }
565
566 for_all_symbols(i, sym) {
567 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
568 /* Reset values of generates values, so they'll appear
569 * as new, if they should become visible, but that
570 * doesn't quite work if the Kconfig and the saved
571 * configuration disagree.
572 */
573 if (sym->visible == no && !conf_unsaved)
574 sym->flags &= ~SYMBOL_DEF_USER;
575 switch (sym->type) {
576 case S_STRING:
577 case S_INT:
578 case S_HEX:
579 /* Reset a string value if it's out of range */
580 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
581 break;
582 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
583 conf_unsaved++;
584 break;
585 default:
586 break;
587 }
588 }
589 }
590
591 if (conf_warnings || conf_unsaved)
592 conf_set_changed(true);
593
594 return 0;
595}
596
597/*
598 * Kconfig configuration printer
599 *
600 * This printer is used when generating the resulting configuration after
601 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
602 * passing a non-NULL argument to the printer.
603 *
604 */
605static void
606kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
607{
608
609 switch (sym->type) {
610 case S_BOOLEAN:
611 case S_TRISTATE:
612 if (*value == 'n') {
613 bool skip_unset = (arg != NULL);
614
615 if (!skip_unset)
616 fprintf(fp, "# %s%s is not set\n",
617 CONFIG_, sym->name);
618 return;
619 }
620 break;
621 default:
622 break;
623 }
624
625 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
626}
627
628static void
629kconfig_print_comment(FILE *fp, const char *value, void *arg)
630{
631 const char *p = value;
632 size_t l;
633
634 for (;;) {
635 l = strcspn(p, "\n");
636 fprintf(fp, "#");
637 if (l) {
638 fprintf(fp, " ");
639 xfwrite(p, l, 1, fp);
640 p += l;
641 }
642 fprintf(fp, "\n");
643 if (*p++ == '\0')
644 break;
645 }
646}
647
648static struct conf_printer kconfig_printer_cb =
649{
650 .print_symbol = kconfig_print_symbol,
651 .print_comment = kconfig_print_comment,
652};
653
654/*
655 * Header printer
656 *
657 * This printer is used when generating the `include/generated/autoconf.h' file.
658 */
659static void
660header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
661{
662
663 switch (sym->type) {
664 case S_BOOLEAN:
665 case S_TRISTATE: {
666 const char *suffix = "";
667
668 switch (*value) {
669 case 'n':
670 break;
671 case 'm':
672 suffix = "_MODULE";
673 /* fall through */
674 default:
675 fprintf(fp, "#define %s%s%s 1\n",
676 CONFIG_, sym->name, suffix);
677 }
678 break;
679 }
680 case S_HEX: {
681 const char *prefix = "";
682
683 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
684 prefix = "0x";
685 fprintf(fp, "#define %s%s %s%s\n",
686 CONFIG_, sym->name, prefix, value);
687 break;
688 }
689 case S_STRING:
690 case S_INT:
691 fprintf(fp, "#define %s%s %s\n",
692 CONFIG_, sym->name, value);
693 break;
694 default:
695 break;
696 }
697
698}
699
700static void
701header_print_comment(FILE *fp, const char *value, void *arg)
702{
703 const char *p = value;
704 size_t l;
705
706 fprintf(fp, "/*\n");
707 for (;;) {
708 l = strcspn(p, "\n");
709 fprintf(fp, " *");
710 if (l) {
711 fprintf(fp, " ");
712 xfwrite(p, l, 1, fp);
713 p += l;
714 }
715 fprintf(fp, "\n");
716 if (*p++ == '\0')
717 break;
718 }
719 fprintf(fp, " */\n");
720}
721
722static struct conf_printer header_printer_cb =
723{
724 .print_symbol = header_print_symbol,
725 .print_comment = header_print_comment,
726};
727
728static void conf_write_symbol(FILE *fp, struct symbol *sym,
729 struct conf_printer *printer, void *printer_arg)
730{
731 const char *str;
732
733 switch (sym->type) {
734 case S_UNKNOWN:
735 break;
736 case S_STRING:
737 str = sym_get_string_value(sym);
738 str = sym_escape_string_value(str);
739 printer->print_symbol(fp, sym, str, printer_arg);
740 free((void *)str);
741 break;
742 default:
743 str = sym_get_string_value(sym);
744 printer->print_symbol(fp, sym, str, printer_arg);
745 }
746}
747
748static void
749conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
750{
751 char buf[256];
752
753 snprintf(buf, sizeof(buf),
754 "\n"
755 "Automatically generated file; DO NOT EDIT.\n"
756 "%s\n",
757 rootmenu.prompt->text);
758
759 printer->print_comment(fp, buf, printer_arg);
760}
761
762/*
763 * Write out a minimal config.
764 * All values that has default values are skipped as this is redundant.
765 */
766int conf_write_defconfig(const char *filename)
767{
768 struct symbol *sym;
769 struct menu *menu;
770 FILE *out;
771
772 out = fopen(filename, "w");
773 if (!out)
774 return 1;
775
776 sym_clear_all_valid();
777
778 /* Traverse all menus to find all relevant symbols */
779 menu = rootmenu.list;
780
781 while (menu != NULL)
782 {
783 sym = menu->sym;
784 if (sym == NULL) {
785 if (!menu_is_visible(menu))
786 goto next_menu;
787 } else if (!sym_is_choice(sym)) {
788 sym_calc_value(sym);
789 if (!(sym->flags & SYMBOL_WRITE))
790 goto next_menu;
791 sym->flags &= ~SYMBOL_WRITE;
792 /* If we cannot change the symbol - skip */
793 if (!sym_is_changeable(sym))
794 goto next_menu;
795 /* If symbol equals to default value - skip */
796 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
797 goto next_menu;
798
799 /*
800 * If symbol is a choice value and equals to the
801 * default for a choice - skip.
802 * But only if value is bool and equal to "y" and
803 * choice is not "optional".
804 * (If choice is "optional" then all values can be "n")
805 */
806 if (sym_is_choice_value(sym)) {
807 struct symbol *cs;
808 struct symbol *ds;
809
810 cs = prop_get_symbol(sym_get_choice_prop(sym));
811 ds = sym_choice_default(cs);
812 if (!sym_is_optional(cs) && sym == ds) {
813 if ((sym->type == S_BOOLEAN) &&
814 sym_get_tristate_value(sym) == yes)
815 goto next_menu;
816 }
817 }
818 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
819 }
820next_menu:
821 if (menu->list != NULL) {
822 menu = menu->list;
823 }
824 else if (menu->next != NULL) {
825 menu = menu->next;
826 } else {
827 while ((menu = menu->parent)) {
828 if (menu->next != NULL) {
829 menu = menu->next;
830 break;
831 }
832 }
833 }
834 }
835 fclose(out);
836 return 0;
837}
838
839int conf_write(const char *name)
840{
841 FILE *out;
842 struct symbol *sym;
843 struct menu *menu;
844 const char *str;
845 char tmpname[PATH_MAX + 1], oldname[PATH_MAX + 1];
846 char *env;
847 int i;
848 bool need_newline = false;
849
850 if (!name)
851 name = conf_get_configname();
852
853 if (!*name) {
854 fprintf(stderr, "config name is empty\n");
855 return -1;
856 }
857
858 if (is_dir(name)) {
859 fprintf(stderr, "%s: Is a directory\n", name);
860 return -1;
861 }
862
863 if (make_parent_dir(name))
864 return -1;
865
866 env = getenv("KCONFIG_OVERWRITECONFIG");
867 if (env && *env) {
868 *tmpname = 0;
869 out = fopen(name, "w");
870 } else {
871 snprintf(tmpname, sizeof(tmpname), "%s.%d.tmp",
872 name, (int)getpid());
873 out = fopen(tmpname, "w");
874 }
875 if (!out)
876 return 1;
877
878 conf_write_heading(out, &kconfig_printer_cb, NULL);
879
880 if (!conf_get_changed())
881 sym_clear_all_valid();
882
883 menu = rootmenu.list;
884 while (menu) {
885 sym = menu->sym;
886 if (!sym) {
887 if (!menu_is_visible(menu))
888 goto next;
889 str = menu_get_prompt(menu);
890 fprintf(out, "\n"
891 "#\n"
892 "# %s\n"
893 "#\n", str);
894 need_newline = false;
895 } else if (!(sym->flags & SYMBOL_CHOICE) &&
896 !(sym->flags & SYMBOL_WRITTEN)) {
897 sym_calc_value(sym);
898 if (!(sym->flags & SYMBOL_WRITE))
899 goto next;
900 if (need_newline) {
901 fprintf(out, "\n");
902 need_newline = false;
903 }
904 sym->flags |= SYMBOL_WRITTEN;
905 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
906 }
907
908next:
909 if (menu->list) {
910 menu = menu->list;
911 continue;
912 }
913 if (menu->next)
914 menu = menu->next;
915 else while ((menu = menu->parent)) {
916 if (!menu->sym && menu_is_visible(menu) &&
917 menu != &rootmenu) {
918 str = menu_get_prompt(menu);
919 fprintf(out, "# end of %s\n", str);
920 need_newline = true;
921 }
922 if (menu->next) {
923 menu = menu->next;
924 break;
925 }
926 }
927 }
928 fclose(out);
929
930 for_all_symbols(i, sym)
931 sym->flags &= ~SYMBOL_WRITTEN;
932
933 if (*tmpname) {
934 if (is_same(name, tmpname)) {
935 conf_message("No change to %s", name);
936 unlink(tmpname);
937 conf_set_changed(false);
938 return 0;
939 }
940
941 snprintf(oldname, sizeof(oldname), "%s.old", name);
942 rename(name, oldname);
943 if (rename(tmpname, name))
944 return 1;
945 }
946
947 conf_message("configuration written to %s", name);
948
949 conf_set_changed(false);
950
951 return 0;
952}
953
954/* write a dependency file as used by kbuild to track dependencies */
955static int conf_write_dep(const char *name)
956{
957 struct file *file;
958 FILE *out;
959
960 out = fopen("..config.tmp", "w");
961 if (!out)
962 return 1;
963 fprintf(out, "deps_config := \\\n");
964 for (file = file_list; file; file = file->next) {
965 if (file->next)
966 fprintf(out, "\t%s \\\n", file->name);
967 else
968 fprintf(out, "\t%s\n", file->name);
969 }
970 fprintf(out, "\n%s: \\\n"
971 "\t$(deps_config)\n\n", conf_get_autoconfig_name());
972
973 env_write_dep(out, conf_get_autoconfig_name());
974
975 fprintf(out, "\n$(deps_config): ;\n");
976 fclose(out);
977
978 if (make_parent_dir(name))
979 return 1;
980 rename("..config.tmp", name);
981 return 0;
982}
983
984static int conf_touch_deps(void)
985{
986 const char *name;
987 struct symbol *sym;
988 int res, i;
989
990 strcpy(depfile_path, "include/config/");
991 depfile_prefix_len = strlen(depfile_path);
992
993 name = conf_get_autoconfig_name();
994 conf_read_simple(name, S_DEF_AUTO);
995 sym_calc_value(modules_sym);
996
997 for_all_symbols(i, sym) {
998 sym_calc_value(sym);
999 if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name)
1000 continue;
1001 if (sym->flags & SYMBOL_WRITE) {
1002 if (sym->flags & SYMBOL_DEF_AUTO) {
1003 /*
1004 * symbol has old and new value,
1005 * so compare them...
1006 */
1007 switch (sym->type) {
1008 case S_BOOLEAN:
1009 case S_TRISTATE:
1010 if (sym_get_tristate_value(sym) ==
1011 sym->def[S_DEF_AUTO].tri)
1012 continue;
1013 break;
1014 case S_STRING:
1015 case S_HEX:
1016 case S_INT:
1017 if (!strcmp(sym_get_string_value(sym),
1018 sym->def[S_DEF_AUTO].val))
1019 continue;
1020 break;
1021 default:
1022 break;
1023 }
1024 } else {
1025 /*
1026 * If there is no old value, only 'no' (unset)
1027 * is allowed as new value.
1028 */
1029 switch (sym->type) {
1030 case S_BOOLEAN:
1031 case S_TRISTATE:
1032 if (sym_get_tristate_value(sym) == no)
1033 continue;
1034 break;
1035 default:
1036 break;
1037 }
1038 }
1039 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
1040 /* There is neither an old nor a new value. */
1041 continue;
1042 /* else
1043 * There is an old value, but no new value ('no' (unset)
1044 * isn't saved in auto.conf, so the old value is always
1045 * different from 'no').
1046 */
1047
1048 res = conf_touch_dep(sym->name);
1049 if (res)
1050 return res;
1051 }
1052
1053 return 0;
1054}
1055
1056int conf_write_autoconf(int overwrite)
1057{
1058 struct symbol *sym;
1059 const char *name;
1060 const char *autoconf_name = conf_get_autoconfig_name();
1061 FILE *out, *out_h;
1062 int i;
1063
1064 if (!overwrite && is_present(autoconf_name))
1065 return 0;
1066
1067 conf_write_dep("include/config/auto.conf.cmd");
1068
1069 if (conf_touch_deps())
1070 return 1;
1071
1072 out = fopen(".tmpconfig", "w");
1073 if (!out)
1074 return 1;
1075
1076 out_h = fopen(".tmpconfig.h", "w");
1077 if (!out_h) {
1078 fclose(out);
1079 return 1;
1080 }
1081
1082 conf_write_heading(out, &kconfig_printer_cb, NULL);
1083 conf_write_heading(out_h, &header_printer_cb, NULL);
1084
1085 for_all_symbols(i, sym) {
1086 sym_calc_value(sym);
1087 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1088 continue;
1089
1090 /* write symbols to auto.conf and autoconf.h */
1091 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1092 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1093 }
1094 fclose(out);
1095 fclose(out_h);
1096
1097 name = getenv("KCONFIG_AUTOHEADER");
1098 if (!name)
1099 name = "include/generated/autoconf.h";
1100 if (make_parent_dir(name))
1101 return 1;
1102 if (rename(".tmpconfig.h", name))
1103 return 1;
1104
1105 if (make_parent_dir(autoconf_name))
1106 return 1;
1107 /*
1108 * This must be the last step, kbuild has a dependency on auto.conf
1109 * and this marks the successful completion of the previous steps.
1110 */
1111 if (rename(".tmpconfig", autoconf_name))
1112 return 1;
1113
1114 return 0;
1115}
1116
1117static bool conf_changed;
1118static void (*conf_changed_callback)(void);
1119
1120void conf_set_changed(bool val)
1121{
1122 if (conf_changed_callback && conf_changed != val)
1123 conf_changed_callback();
1124
1125 conf_changed = val;
1126}
1127
1128bool conf_get_changed(void)
1129{
1130 return conf_changed;
1131}
1132
1133void conf_set_changed_callback(void (*fn)(void))
1134{
1135 conf_changed_callback = fn;
1136}
1137
1138void set_all_choice_values(struct symbol *csym)
1139{
1140 struct property *prop;
1141 struct symbol *sym;
1142 struct expr *e;
1143
1144 prop = sym_get_choice_prop(csym);
1145
1146 /*
1147 * Set all non-assinged choice values to no
1148 */
1149 expr_list_for_each_sym(prop->expr, e, sym) {
1150 if (!sym_has_value(sym))
1151 sym->def[S_DEF_USER].tri = no;
1152 }
1153 csym->flags |= SYMBOL_DEF_USER;
1154 /* clear VALID to get value calculated */
1155 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1156}