1 /*
2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
4 */
5
6 #include <sys/stat.h>
7 #include <ctype.h>
8 #include <errno.h>
9 #include <fcntl.h>
10 #include <stdarg.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <time.h>
15 #include <unistd.h>
16
17 #include "lkc.h"
18
19 struct conf_printer {
20 void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
21 void (*print_comment)(FILE *, const char *, void *);
22 };
23
24 static void conf_warning(const char *fmt, ...)
25 __attribute__ ((format (printf, 1, 2)));
26
27 static void conf_message(const char *fmt, ...)
28 __attribute__ ((format (printf, 1, 2)));
29
30 static const char *conf_filename;
31 static int conf_lineno, conf_warnings;
32
33 const char conf_defname[] = "arch/$ARCH/defconfig";
34
conf_warning(const char * fmt,...)35 static void conf_warning(const char *fmt, ...)
36 {
37 va_list ap;
38 va_start(ap, fmt);
39 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
40 vfprintf(stderr, fmt, ap);
41 fprintf(stderr, "\n");
42 va_end(ap);
43 conf_warnings++;
44 }
45
conf_default_message_callback(const char * fmt,va_list ap)46 static void conf_default_message_callback(const char *fmt, va_list ap)
47 {
48 printf("#\n# ");
49 vprintf(fmt, ap);
50 printf("\n#\n");
51 }
52
53 static void (*conf_message_callback) (const char *fmt, va_list ap) =
54 conf_default_message_callback;
conf_set_message_callback(void (* fn)(const char * fmt,va_list ap))55 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
56 {
57 conf_message_callback = fn;
58 }
59
conf_message(const char * fmt,...)60 static void conf_message(const char *fmt, ...)
61 {
62 va_list ap;
63
64 va_start(ap, fmt);
65 if (conf_message_callback)
66 conf_message_callback(fmt, ap);
67 va_end(ap);
68 }
69
conf_get_configname(void)70 const char *conf_get_configname(void)
71 {
72 char *name = getenv("KCONFIG_CONFIG");
73
74 return name ? name : ".config";
75 }
76
conf_get_autoconfig_name(void)77 const char *conf_get_autoconfig_name(void)
78 {
79 char *name = getenv("KCONFIG_AUTOCONFIG");
80
81 return name ? name : "include/config/auto.conf";
82 }
83
conf_expand_value(const char * in)84 static char *conf_expand_value(const char *in)
85 {
86 struct symbol *sym;
87 const char *src;
88 static char res_value[SYMBOL_MAXLENGTH];
89 char *dst, name[SYMBOL_MAXLENGTH];
90
91 res_value[0] = 0;
92 dst = name;
93 while ((src = strchr(in, '$'))) {
94 strncat(res_value, in, src - in);
95 src++;
96 dst = name;
97 while (isalnum(*src) || *src == '_')
98 *dst++ = *src++;
99 *dst = 0;
100 sym = sym_lookup(name, 0);
101 sym_calc_value(sym);
102 strcat(res_value, sym_get_string_value(sym));
103 in = src;
104 }
105 strcat(res_value, in);
106
107 return res_value;
108 }
109
conf_get_default_confname(void)110 char *conf_get_default_confname(void)
111 {
112 struct stat buf;
113 static char fullname[PATH_MAX+1];
114 char *env, *name;
115
116 name = conf_expand_value(conf_defname);
117 env = getenv(SRCTREE);
118 if (env) {
119 sprintf(fullname, "%s/%s", env, name);
120 if (!stat(fullname, &buf))
121 return fullname;
122 }
123 return name;
124 }
125
conf_set_sym_val(struct symbol * sym,int def,int def_flags,char * p)126 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
127 {
128 char *p2;
129
130 switch (sym->type) {
131 case S_TRISTATE:
132 if (p[0] == 'm') {
133 sym->def[def].tri = mod;
134 sym->flags |= def_flags;
135 break;
136 }
137 /* fall through */
138 case S_BOOLEAN:
139 if (p[0] == 'y') {
140 sym->def[def].tri = yes;
141 sym->flags |= def_flags;
142 break;
143 }
144 if (p[0] == 'n') {
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 /* Last char has to be a '"' */
165 if (p[strlen(p) - 1] != '"') {
166 if (def != S_DEF_AUTO)
167 conf_warning("invalid string found");
168 return 1;
169 }
170 /* Overwrite '"' with \0 for string termination */
171 p[strlen(p) - 1] = 0;
172 /* fall through */
173 case S_INT:
174 case S_HEX:
175 done:
176 if (sym_string_valid(sym, p)) {
177 sym->def[def].val = xstrdup(p);
178 sym->flags |= def_flags;
179 } else {
180 if (def != S_DEF_AUTO)
181 conf_warning("symbol value '%s' invalid for %s",
182 p, sym->name);
183 return 1;
184 }
185 break;
186 default:
187 ;
188 }
189 return 0;
190 }
191
192 #define LINE_GROWTH 16
add_byte(int c,char ** lineptr,size_t slen,size_t * n)193 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
194 {
195 char *nline;
196 size_t new_size = slen + 1;
197 if (new_size > *n) {
198 new_size += LINE_GROWTH - 1;
199 new_size *= 2;
200 nline = xrealloc(*lineptr, new_size);
201 if (!nline)
202 return -1;
203
204 *lineptr = nline;
205 *n = new_size;
206 }
207
208 (*lineptr)[slen] = c;
209
210 return 0;
211 }
212
compat_getline(char ** lineptr,size_t * n,FILE * stream)213 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
214 {
215 char *line = *lineptr;
216 size_t slen = 0;
217
218 for (;;) {
219 int c = getc(stream);
220
221 switch (c) {
222 case '\n':
223 if (add_byte(c, &line, slen, n) < 0)
224 goto e_out;
225 slen++;
226 /* fall through */
227 case EOF:
228 if (add_byte('\0', &line, slen, n) < 0)
229 goto e_out;
230 *lineptr = line;
231 if (slen == 0)
232 return -1;
233 return slen;
234 default:
235 if (add_byte(c, &line, slen, n) < 0)
236 goto e_out;
237 slen++;
238 }
239 }
240
241 e_out:
242 line[slen-1] = '\0';
243 *lineptr = line;
244 return -1;
245 }
246
conf_read_simple(const char * name,int def)247 int conf_read_simple(const char *name, int def)
248 {
249 FILE *in = NULL;
250 char *line = NULL;
251 size_t line_asize = 0;
252 char *p, *p2;
253 struct symbol *sym;
254 int i, def_flags;
255
256 if (name) {
257 in = zconf_fopen(name);
258 } else {
259 struct property *prop;
260
261 name = conf_get_configname();
262 in = zconf_fopen(name);
263 if (in)
264 goto load;
265 sym_add_change_count(1);
266 if (!sym_defconfig_list)
267 return 1;
268
269 for_all_defaults(sym_defconfig_list, prop) {
270 if (expr_calc_value(prop->visible.expr) == no ||
271 prop->expr->type != E_SYMBOL)
272 continue;
273 name = conf_expand_value(prop->expr->left.sym->name);
274 in = zconf_fopen(name);
275 if (in) {
276 conf_message(_("using defaults found in %s"),
277 name);
278 goto load;
279 }
280 }
281 }
282 if (!in)
283 return 1;
284
285 load:
286 conf_filename = name;
287 conf_lineno = 0;
288 conf_warnings = 0;
289
290 def_flags = SYMBOL_DEF << def;
291 for_all_symbols(i, sym) {
292 sym->flags |= SYMBOL_CHANGED;
293 sym->flags &= ~(def_flags|SYMBOL_VALID);
294 if (sym_is_choice(sym))
295 sym->flags |= def_flags;
296 switch (sym->type) {
297 case S_INT:
298 case S_HEX:
299 case S_STRING:
300 if (sym->def[def].val)
301 free(sym->def[def].val);
302 /* fall through */
303 default:
304 sym->def[def].val = NULL;
305 sym->def[def].tri = no;
306 }
307 }
308
309 while (compat_getline(&line, &line_asize, in) != -1) {
310 conf_lineno++;
311 sym = NULL;
312 if (line[0] == '#') {
313 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
314 continue;
315 p = strchr(line + 2 + strlen(CONFIG_), ' ');
316 if (!p)
317 continue;
318 *p++ = 0;
319 if (strncmp(p, "is not set", 10))
320 continue;
321 if (def == S_DEF_USER) {
322 sym = sym_find(line + 2 + strlen(CONFIG_));
323 if (!sym) {
324 sym_add_change_count(1);
325 goto setsym;
326 }
327 } else {
328 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
329 if (sym->type == S_UNKNOWN)
330 sym->type = S_BOOLEAN;
331 }
332 if (sym->flags & def_flags) {
333 conf_warning("override: reassigning to symbol %s", sym->name);
334 }
335 switch (sym->type) {
336 case S_BOOLEAN:
337 case S_TRISTATE:
338 sym->def[def].tri = no;
339 sym->flags |= def_flags;
340 break;
341 default:
342 ;
343 }
344 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
345 p = strchr(line + strlen(CONFIG_), '=');
346 if (!p)
347 continue;
348 *p++ = 0;
349 p2 = strchr(p, '\n');
350 if (p2) {
351 *p2-- = 0;
352 if (*p2 == '\r')
353 *p2 = 0;
354 }
355 if (def == S_DEF_USER) {
356 sym = sym_find(line + strlen(CONFIG_));
357 if (!sym) {
358 sym_add_change_count(1);
359 goto setsym;
360 }
361 } else {
362 sym = sym_lookup(line + strlen(CONFIG_), 0);
363 if (sym->type == S_UNKNOWN)
364 sym->type = S_OTHER;
365 }
366 if (sym->flags & def_flags) {
367 conf_warning("override: reassigning to symbol %s", sym->name);
368 }
369 if (conf_set_sym_val(sym, def, def_flags, p))
370 continue;
371 } else {
372 if (line[0] != '\r' && line[0] != '\n')
373 conf_warning("unexpected data: %.*s",
374 (int)strcspn(line, "\r\n"), line);
375
376 continue;
377 }
378 setsym:
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 return 0;
402 }
403
conf_read(const char * name)404 int conf_read(const char *name)
405 {
406 struct symbol *sym;
407 int conf_unsaved = 0;
408 int i;
409
410 sym_set_change_count(0);
411
412 if (conf_read_simple(name, S_DEF_USER)) {
413 sym_calc_value(modules_sym);
414 return 1;
415 }
416
417 sym_calc_value(modules_sym);
418
419 for_all_symbols(i, sym) {
420 sym_calc_value(sym);
421 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
422 continue;
423 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
424 /* check that calculated value agrees with saved value */
425 switch (sym->type) {
426 case S_BOOLEAN:
427 case S_TRISTATE:
428 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
429 break;
430 if (!sym_is_choice(sym))
431 continue;
432 /* fall through */
433 default:
434 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
435 continue;
436 break;
437 }
438 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
439 /* no previous value and not saved */
440 continue;
441 conf_unsaved++;
442 /* maybe print value in verbose mode... */
443 }
444
445 for_all_symbols(i, sym) {
446 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
447 /* Reset values of generates values, so they'll appear
448 * as new, if they should become visible, but that
449 * doesn't quite work if the Kconfig and the saved
450 * configuration disagree.
451 */
452 if (sym->visible == no && !conf_unsaved)
453 sym->flags &= ~SYMBOL_DEF_USER;
454 switch (sym->type) {
455 case S_STRING:
456 case S_INT:
457 case S_HEX:
458 /* Reset a string value if it's out of range */
459 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
460 break;
461 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
462 conf_unsaved++;
463 break;
464 default:
465 break;
466 }
467 }
468 }
469
470 sym_add_change_count(conf_warnings || conf_unsaved);
471
472 return 0;
473 }
474
475 /*
476 * Kconfig configuration printer
477 *
478 * This printer is used when generating the resulting configuration after
479 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
480 * passing a non-NULL argument to the printer.
481 *
482 */
483 static void
kconfig_print_symbol(FILE * fp,struct symbol * sym,const char * value,void * arg)484 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
485 {
486
487 switch (sym->type) {
488 case S_BOOLEAN:
489 case S_TRISTATE:
490 if (*value == 'n') {
491 bool skip_unset = (arg != NULL);
492
493 if (!skip_unset)
494 fprintf(fp, "# %s%s is not set\n",
495 CONFIG_, sym->name);
496 return;
497 }
498 break;
499 default:
500 break;
501 }
502
503 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
504 }
505
506 static void
kconfig_print_comment(FILE * fp,const char * value,void * arg)507 kconfig_print_comment(FILE *fp, const char *value, void *arg)
508 {
509 const char *p = value;
510 size_t l;
511
512 for (;;) {
513 l = strcspn(p, "\n");
514 fprintf(fp, "#");
515 if (l) {
516 fprintf(fp, " ");
517 xfwrite(p, l, 1, fp);
518 p += l;
519 }
520 fprintf(fp, "\n");
521 if (*p++ == '\0')
522 break;
523 }
524 }
525
526 static struct conf_printer kconfig_printer_cb =
527 {
528 .print_symbol = kconfig_print_symbol,
529 .print_comment = kconfig_print_comment,
530 };
531
532 /*
533 * Header printer
534 *
535 * This printer is used when generating the `include/generated/autoconf.h' file.
536 */
537 static void
header_print_symbol(FILE * fp,struct symbol * sym,const char * value,void * arg)538 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
539 {
540
541 switch (sym->type) {
542 case S_BOOLEAN:
543 case S_TRISTATE: {
544 const char *suffix = "";
545
546 switch (*value) {
547 case 'n':
548 break;
549 case 'm':
550 suffix = "_MODULE";
551 /* fall through */
552 default:
553 fprintf(fp, "#define %s%s%s 1\n",
554 CONFIG_, sym->name, suffix);
555 }
556 break;
557 }
558 case S_HEX: {
559 const char *prefix = "";
560
561 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
562 prefix = "0x";
563 fprintf(fp, "#define %s%s %s%s\n",
564 CONFIG_, sym->name, prefix, value);
565 break;
566 }
567 case S_STRING:
568 case S_INT:
569 fprintf(fp, "#define %s%s %s\n",
570 CONFIG_, sym->name, value);
571 break;
572 default:
573 break;
574 }
575
576 }
577
578 static void
header_print_comment(FILE * fp,const char * value,void * arg)579 header_print_comment(FILE *fp, const char *value, void *arg)
580 {
581 const char *p = value;
582 size_t l;
583
584 fprintf(fp, "/*\n");
585 for (;;) {
586 l = strcspn(p, "\n");
587 fprintf(fp, " *");
588 if (l) {
589 fprintf(fp, " ");
590 xfwrite(p, l, 1, fp);
591 p += l;
592 }
593 fprintf(fp, "\n");
594 if (*p++ == '\0')
595 break;
596 }
597 fprintf(fp, " */\n");
598 }
599
600 static struct conf_printer header_printer_cb =
601 {
602 .print_symbol = header_print_symbol,
603 .print_comment = header_print_comment,
604 };
605
606 /*
607 * Tristate printer
608 *
609 * This printer is used when generating the `include/config/tristate.conf' file.
610 */
611 static void
tristate_print_symbol(FILE * fp,struct symbol * sym,const char * value,void * arg)612 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
613 {
614
615 if (sym->type == S_TRISTATE && *value != 'n')
616 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
617 }
618
619 static struct conf_printer tristate_printer_cb =
620 {
621 .print_symbol = tristate_print_symbol,
622 .print_comment = kconfig_print_comment,
623 };
624
conf_write_symbol(FILE * fp,struct symbol * sym,struct conf_printer * printer,void * printer_arg)625 static void conf_write_symbol(FILE *fp, struct symbol *sym,
626 struct conf_printer *printer, void *printer_arg)
627 {
628 const char *str;
629 char *str2;
630
631 switch (sym->type) {
632 case S_OTHER:
633 case S_UNKNOWN:
634 break;
635 case S_STRING:
636 str = sym_get_string_value(sym);
637 str2 = xmalloc(strlen(str) + 3);
638 sprintf(str2, "\"%s\"", str);
639 printer->print_symbol(fp, sym, str2, printer_arg);
640 free((void *)str2);
641 break;
642 default:
643 str = sym_get_string_value(sym);
644 printer->print_symbol(fp, sym, str, printer_arg);
645 }
646 }
647
648 static void
conf_write_heading(FILE * fp,struct conf_printer * printer,void * printer_arg)649 conf_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 */
conf_write_defconfig(const char * filename)666 int 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 }
720 next_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
conf_write(const char * name)739 int 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
808 next:
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
conf_split_config(void)839 static 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 }
945 out:
946 if (chdir("../.."))
947 return 1;
948
949 return res;
950 }
951
conf_write_autoconf(void)952 int 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
1026 static int sym_change_count;
1027 static void (*conf_changed_callback)(void);
1028
sym_set_change_count(int count)1029 void 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
sym_add_change_count(int count)1038 void sym_add_change_count(int count)
1039 {
1040 sym_set_change_count(count + sym_change_count);
1041 }
1042
conf_get_changed(void)1043 bool conf_get_changed(void)
1044 {
1045 return sym_change_count;
1046 }
1047
conf_set_changed_callback(void (* fn)(void))1048 void conf_set_changed_callback(void (*fn)(void))
1049 {
1050 conf_changed_callback = fn;
1051 }
1052
randomize_choice_values(struct symbol * csym)1053 static 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
set_all_choice_values(struct symbol * csym)1101 void 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
conf_set_all_new_symbols(enum conf_def_mode mode)1121 bool 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 bool = 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 }
1248