f349bdcffa98399d6ec9d4c34805a9035d2a223b
[linux-2.6.git] / scripts / kconfig / confdata.c
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 <stdio.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <time.h>
14 #include <unistd.h>
15
16 #define LKC_DIRECT_LINK
17 #include "lkc.h"
18
19 static void conf_warning(const char *fmt, ...)
20         __attribute__ ((format (printf, 1, 2)));
21
22 static void conf_message(const char *fmt, ...)
23         __attribute__ ((format (printf, 1, 2)));
24
25 static const char *conf_filename;
26 static int conf_lineno, conf_warnings, conf_unsaved;
27
28 const char conf_defname[] = "arch/$ARCH/defconfig";
29
30 static void conf_warning(const char *fmt, ...)
31 {
32         va_list ap;
33         va_start(ap, fmt);
34         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
35         vfprintf(stderr, fmt, ap);
36         fprintf(stderr, "\n");
37         va_end(ap);
38         conf_warnings++;
39 }
40
41 static void conf_default_message_callback(const char *fmt, va_list ap)
42 {
43         printf("#\n# ");
44         vprintf(fmt, ap);
45         printf("\n#\n");
46 }
47
48 static void (*conf_message_callback) (const char *fmt, va_list ap) =
49         conf_default_message_callback;
50 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
51 {
52         conf_message_callback = fn;
53 }
54
55 static void conf_message(const char *fmt, ...)
56 {
57         va_list ap;
58
59         va_start(ap, fmt);
60         if (conf_message_callback)
61                 conf_message_callback(fmt, ap);
62 }
63
64 const char *conf_get_configname(void)
65 {
66         char *name = getenv("KCONFIG_CONFIG");
67
68         return name ? name : ".config";
69 }
70
71 const char *conf_get_autoconfig_name(void)
72 {
73         char *name = getenv("KCONFIG_AUTOCONFIG");
74
75         return name ? name : "include/config/auto.conf";
76 }
77
78 static char *conf_expand_value(const char *in)
79 {
80         struct symbol *sym;
81         const char *src;
82         static char res_value[SYMBOL_MAXLENGTH];
83         char *dst, name[SYMBOL_MAXLENGTH];
84
85         res_value[0] = 0;
86         dst = name;
87         while ((src = strchr(in, '$'))) {
88                 strncat(res_value, in, src - in);
89                 src++;
90                 dst = name;
91                 while (isalnum(*src) || *src == '_')
92                         *dst++ = *src++;
93                 *dst = 0;
94                 sym = sym_lookup(name, 0);
95                 sym_calc_value(sym);
96                 strcat(res_value, sym_get_string_value(sym));
97                 in = src;
98         }
99         strcat(res_value, in);
100
101         return res_value;
102 }
103
104 char *conf_get_default_confname(void)
105 {
106         struct stat buf;
107         static char fullname[PATH_MAX+1];
108         char *env, *name;
109
110         name = conf_expand_value(conf_defname);
111         env = getenv(SRCTREE);
112         if (env) {
113                 sprintf(fullname, "%s/%s", env, name);
114                 if (!stat(fullname, &buf))
115                         return fullname;
116         }
117         return name;
118 }
119
120 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
121 {
122         char *p2;
123
124         switch (sym->type) {
125         case S_TRISTATE:
126                 if (p[0] == 'm') {
127                         sym->def[def].tri = mod;
128                         sym->flags |= def_flags;
129                         break;
130                 }
131         case S_BOOLEAN:
132                 if (p[0] == 'y') {
133                         sym->def[def].tri = yes;
134                         sym->flags |= def_flags;
135                         break;
136                 }
137                 if (p[0] == 'n') {
138                         sym->def[def].tri = no;
139                         sym->flags |= def_flags;
140                         break;
141                 }
142                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
143                 break;
144         case S_OTHER:
145                 if (*p != '"') {
146                         for (p2 = p; *p2 && !isspace(*p2); p2++)
147                                 ;
148                         sym->type = S_STRING;
149                         goto done;
150                 }
151         case S_STRING:
152                 if (*p++ != '"')
153                         break;
154                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
155                         if (*p2 == '"') {
156                                 *p2 = 0;
157                                 break;
158                         }
159                         memmove(p2, p2 + 1, strlen(p2));
160                 }
161                 if (!p2) {
162                         conf_warning("invalid string found");
163                         return 1;
164                 }
165         case S_INT:
166         case S_HEX:
167         done:
168                 if (sym_string_valid(sym, p)) {
169                         sym->def[def].val = strdup(p);
170                         sym->flags |= def_flags;
171                 } else {
172                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
173                         return 1;
174                 }
175                 break;
176         default:
177                 ;
178         }
179         return 0;
180 }
181
182 int conf_read_simple(const char *name, int def)
183 {
184         FILE *in = NULL;
185         char line[1024];
186         char *p, *p2;
187         struct symbol *sym;
188         int i, def_flags;
189
190         if (name) {
191                 in = zconf_fopen(name);
192         } else {
193                 struct property *prop;
194
195                 name = conf_get_configname();
196                 in = zconf_fopen(name);
197                 if (in)
198                         goto load;
199                 sym_add_change_count(1);
200                 if (!sym_defconfig_list) {
201                         if (modules_sym)
202                                 sym_calc_value(modules_sym);
203                         return 1;
204                 }
205
206                 for_all_defaults(sym_defconfig_list, prop) {
207                         if (expr_calc_value(prop->visible.expr) == no ||
208                             prop->expr->type != E_SYMBOL)
209                                 continue;
210                         name = conf_expand_value(prop->expr->left.sym->name);
211                         in = zconf_fopen(name);
212                         if (in) {
213                                 conf_message(_("using defaults found in %s"),
214                                          name);
215                                 goto load;
216                         }
217                 }
218         }
219         if (!in)
220                 return 1;
221
222 load:
223         conf_filename = name;
224         conf_lineno = 0;
225         conf_warnings = 0;
226         conf_unsaved = 0;
227
228         def_flags = SYMBOL_DEF << def;
229         for_all_symbols(i, sym) {
230                 sym->flags |= SYMBOL_CHANGED;
231                 sym->flags &= ~(def_flags|SYMBOL_VALID);
232                 if (sym_is_choice(sym))
233                         sym->flags |= def_flags;
234                 switch (sym->type) {
235                 case S_INT:
236                 case S_HEX:
237                 case S_STRING:
238                         if (sym->def[def].val)
239                                 free(sym->def[def].val);
240                 default:
241                         sym->def[def].val = NULL;
242                         sym->def[def].tri = no;
243                 }
244         }
245
246         while (fgets(line, sizeof(line), in)) {
247                 conf_lineno++;
248                 sym = NULL;
249                 if (line[0] == '#') {
250                         if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
251                                 continue;
252                         p = strchr(line + 2 + strlen(CONFIG_), ' ');
253                         if (!p)
254                                 continue;
255                         *p++ = 0;
256                         if (strncmp(p, "is not set", 10))
257                                 continue;
258                         if (def == S_DEF_USER) {
259                                 sym = sym_find(line + 2 + strlen(CONFIG_));
260                                 if (!sym) {
261                                         sym_add_change_count(1);
262                                         goto setsym;
263                                 }
264                         } else {
265                                 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
266                                 if (sym->type == S_UNKNOWN)
267                                         sym->type = S_BOOLEAN;
268                         }
269                         if (sym->flags & def_flags) {
270                                 conf_warning("override: reassigning to symbol %s", sym->name);
271                         }
272                         switch (sym->type) {
273                         case S_BOOLEAN:
274                         case S_TRISTATE:
275                                 sym->def[def].tri = no;
276                                 sym->flags |= def_flags;
277                                 break;
278                         default:
279                                 ;
280                         }
281                 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
282                         p = strchr(line + strlen(CONFIG_), '=');
283                         if (!p)
284                                 continue;
285                         *p++ = 0;
286                         p2 = strchr(p, '\n');
287                         if (p2) {
288                                 *p2-- = 0;
289                                 if (*p2 == '\r')
290                                         *p2 = 0;
291                         }
292                         if (def == S_DEF_USER) {
293                                 sym = sym_find(line + strlen(CONFIG_));
294                                 if (!sym) {
295                                         sym_add_change_count(1);
296                                         goto setsym;
297                                 }
298                         } else {
299                                 sym = sym_lookup(line + strlen(CONFIG_), 0);
300                                 if (sym->type == S_UNKNOWN)
301                                         sym->type = S_OTHER;
302                         }
303                         if (sym->flags & def_flags) {
304                                 conf_warning("override: reassigning to symbol %s", sym->name);
305                         }
306                         if (conf_set_sym_val(sym, def, def_flags, p))
307                                 continue;
308                 } else {
309                         if (line[0] != '\r' && line[0] != '\n')
310                                 conf_warning("unexpected data");
311                         continue;
312                 }
313 setsym:
314                 if (sym && sym_is_choice_value(sym)) {
315                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
316                         switch (sym->def[def].tri) {
317                         case no:
318                                 break;
319                         case mod:
320                                 if (cs->def[def].tri == yes) {
321                                         conf_warning("%s creates inconsistent choice state", sym->name);
322                                         cs->flags &= ~def_flags;
323                                 }
324                                 break;
325                         case yes:
326                                 if (cs->def[def].tri != no)
327                                         conf_warning("override: %s changes choice state", sym->name);
328                                 cs->def[def].val = sym;
329                                 break;
330                         }
331                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
332                 }
333         }
334         fclose(in);
335
336         if (modules_sym)
337                 sym_calc_value(modules_sym);
338         return 0;
339 }
340
341 int conf_read(const char *name)
342 {
343         struct symbol *sym, *choice_sym;
344         struct property *prop;
345         struct expr *e;
346         int i, flags;
347
348         sym_set_change_count(0);
349
350         if (conf_read_simple(name, S_DEF_USER))
351                 return 1;
352
353         for_all_symbols(i, sym) {
354                 sym_calc_value(sym);
355                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
356                         goto sym_ok;
357                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
358                         /* check that calculated value agrees with saved value */
359                         switch (sym->type) {
360                         case S_BOOLEAN:
361                         case S_TRISTATE:
362                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
363                                         break;
364                                 if (!sym_is_choice(sym))
365                                         goto sym_ok;
366                         default:
367                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
368                                         goto sym_ok;
369                                 break;
370                         }
371                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
372                         /* no previous value and not saved */
373                         goto sym_ok;
374                 conf_unsaved++;
375                 /* maybe print value in verbose mode... */
376         sym_ok:
377                 if (!sym_is_choice(sym))
378                         continue;
379                 /* The choice symbol only has a set value (and thus is not new)
380                  * if all its visible childs have values.
381                  */
382                 prop = sym_get_choice_prop(sym);
383                 flags = sym->flags;
384                 expr_list_for_each_sym(prop->expr, e, choice_sym)
385                         if (choice_sym->visible != no)
386                                 flags &= choice_sym->flags;
387                 sym->flags &= flags | ~SYMBOL_DEF_USER;
388         }
389
390         for_all_symbols(i, sym) {
391                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
392                         /* Reset values of generates values, so they'll appear
393                          * as new, if they should become visible, but that
394                          * doesn't quite work if the Kconfig and the saved
395                          * configuration disagree.
396                          */
397                         if (sym->visible == no && !conf_unsaved)
398                                 sym->flags &= ~SYMBOL_DEF_USER;
399                         switch (sym->type) {
400                         case S_STRING:
401                         case S_INT:
402                         case S_HEX:
403                                 /* Reset a string value if it's out of range */
404                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
405                                         break;
406                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
407                                 conf_unsaved++;
408                                 break;
409                         default:
410                                 break;
411                         }
412                 }
413         }
414
415         sym_add_change_count(conf_warnings || conf_unsaved);
416
417         return 0;
418 }
419
420 /* Write a S_STRING */
421 static void conf_write_string(bool headerfile, const char *name,
422                               const char *str, FILE *out)
423 {
424         int l;
425         if (headerfile)
426                 fprintf(out, "#define %s%s \"", CONFIG_, name);
427         else
428                 fprintf(out, "%s%s=\"", CONFIG_, name);
429
430         while (1) {
431                 l = strcspn(str, "\"\\");
432                 if (l) {
433                         xfwrite(str, l, 1, out);
434                         str += l;
435                 }
436                 if (!*str)
437                         break;
438                 fprintf(out, "\\%c", *str++);
439         }
440         fputs("\"\n", out);
441 }
442
443 static void conf_write_symbol(struct symbol *sym, enum symbol_type type,
444                               FILE *out, bool write_no)
445 {
446         const char *str;
447
448         switch (type) {
449         case S_BOOLEAN:
450         case S_TRISTATE:
451                 switch (sym_get_tristate_value(sym)) {
452                 case no:
453                         if (write_no)
454                                 fprintf(out, "# %s%s is not set\n",
455                                     CONFIG_, sym->name);
456                         break;
457                 case mod:
458                         fprintf(out, "%s%s=m\n", CONFIG_, sym->name);
459                         break;
460                 case yes:
461                         fprintf(out, "%s%s=y\n", CONFIG_, sym->name);
462                         break;
463                 }
464                 break;
465         case S_STRING:
466                 conf_write_string(false, sym->name, sym_get_string_value(sym), out);
467                 break;
468         case S_HEX:
469         case S_INT:
470                 str = sym_get_string_value(sym);
471                 fprintf(out, "%s%s=%s\n", CONFIG_, sym->name, str);
472                 break;
473         case S_OTHER:
474         case S_UNKNOWN:
475                 break;
476         }
477 }
478
479 /*
480  * Write out a minimal config.
481  * All values that has default values are skipped as this is redundant.
482  */
483 int conf_write_defconfig(const char *filename)
484 {
485         struct symbol *sym;
486         struct menu *menu;
487         FILE *out;
488
489         out = fopen(filename, "w");
490         if (!out)
491                 return 1;
492
493         sym_clear_all_valid();
494
495         /* Traverse all menus to find all relevant symbols */
496         menu = rootmenu.list;
497
498         while (menu != NULL)
499         {
500                 sym = menu->sym;
501                 if (sym == NULL) {
502                         if (!menu_is_visible(menu))
503                                 goto next_menu;
504                 } else if (!sym_is_choice(sym)) {
505                         sym_calc_value(sym);
506                         if (!(sym->flags & SYMBOL_WRITE))
507                                 goto next_menu;
508                         sym->flags &= ~SYMBOL_WRITE;
509                         /* If we cannot change the symbol - skip */
510                         if (!sym_is_changable(sym))
511                                 goto next_menu;
512                         /* If symbol equals to default value - skip */
513                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
514                                 goto next_menu;
515
516                         /*
517                          * If symbol is a choice value and equals to the
518                          * default for a choice - skip.
519                          * But only if value is bool and equal to "y" and
520                          * choice is not "optional".
521                          * (If choice is "optional" then all values can be "n")
522                          */
523                         if (sym_is_choice_value(sym)) {
524                                 struct symbol *cs;
525                                 struct symbol *ds;
526
527                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
528                                 ds = sym_choice_default(cs);
529                                 if (!sym_is_optional(cs) && sym == ds) {
530                                         if ((sym->type == S_BOOLEAN) &&
531                                             sym_get_tristate_value(sym) == yes)
532                                                 goto next_menu;
533                                 }
534                         }
535                         conf_write_symbol(sym, sym->type, out, true);
536                 }
537 next_menu:
538                 if (menu->list != NULL) {
539                         menu = menu->list;
540                 }
541                 else if (menu->next != NULL) {
542                         menu = menu->next;
543                 } else {
544                         while ((menu = menu->parent)) {
545                                 if (menu->next != NULL) {
546                                         menu = menu->next;
547                                         break;
548                                 }
549                         }
550                 }
551         }
552         fclose(out);
553         return 0;
554 }
555
556 int conf_write(const char *name)
557 {
558         FILE *out;
559         struct symbol *sym;
560         struct menu *menu;
561         const char *basename;
562         const char *str;
563         char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
564         enum symbol_type type;
565         time_t now;
566         int use_timestamp = 1;
567         char *env;
568
569         dirname[0] = 0;
570         if (name && name[0]) {
571                 struct stat st;
572                 char *slash;
573
574                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
575                         strcpy(dirname, name);
576                         strcat(dirname, "/");
577                         basename = conf_get_configname();
578                 } else if ((slash = strrchr(name, '/'))) {
579                         int size = slash - name + 1;
580                         memcpy(dirname, name, size);
581                         dirname[size] = 0;
582                         if (slash[1])
583                                 basename = slash + 1;
584                         else
585                                 basename = conf_get_configname();
586                 } else
587                         basename = name;
588         } else
589                 basename = conf_get_configname();
590
591         sprintf(newname, "%s%s", dirname, basename);
592         env = getenv("KCONFIG_OVERWRITECONFIG");
593         if (!env || !*env) {
594                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
595                 out = fopen(tmpname, "w");
596         } else {
597                 *tmpname = 0;
598                 out = fopen(newname, "w");
599         }
600         if (!out)
601                 return 1;
602
603         time(&now);
604         env = getenv("KCONFIG_NOTIMESTAMP");
605         if (env && *env)
606                 use_timestamp = 0;
607
608         fprintf(out, _("#\n"
609                        "# Automatically generated make config: don't edit\n"
610                        "# %s\n"
611                        "%s%s"
612                        "#\n"),
613                      rootmenu.prompt->text,
614                      use_timestamp ? "# " : "",
615                      use_timestamp ? ctime(&now) : "");
616
617         if (!conf_get_changed())
618                 sym_clear_all_valid();
619
620         menu = rootmenu.list;
621         while (menu) {
622                 sym = menu->sym;
623                 if (!sym) {
624                         if (!menu_is_visible(menu))
625                                 goto next;
626                         str = menu_get_prompt(menu);
627                         fprintf(out, "\n"
628                                      "#\n"
629                                      "# %s\n"
630                                      "#\n", str);
631                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
632                         sym_calc_value(sym);
633                         if (!(sym->flags & SYMBOL_WRITE))
634                                 goto next;
635                         sym->flags &= ~SYMBOL_WRITE;
636                         type = sym->type;
637                         if (type == S_TRISTATE) {
638                                 sym_calc_value(modules_sym);
639                                 if (modules_sym->curr.tri == no)
640                                         type = S_BOOLEAN;
641                         }
642                         /* Write config symbol to file */
643                         conf_write_symbol(sym, type, out, true);
644                 }
645
646 next:
647                 if (menu->list) {
648                         menu = menu->list;
649                         continue;
650                 }
651                 if (menu->next)
652                         menu = menu->next;
653                 else while ((menu = menu->parent)) {
654                         if (menu->next) {
655                                 menu = menu->next;
656                                 break;
657                         }
658                 }
659         }
660         fclose(out);
661
662         if (*tmpname) {
663                 strcat(dirname, basename);
664                 strcat(dirname, ".old");
665                 rename(newname, dirname);
666                 if (rename(tmpname, newname))
667                         return 1;
668         }
669
670         conf_message(_("configuration written to %s"), newname);
671
672         sym_set_change_count(0);
673
674         return 0;
675 }
676
677 static int conf_split_config(void)
678 {
679         const char *name;
680         char path[PATH_MAX+1];
681         char *s, *d, c;
682         struct symbol *sym;
683         struct stat sb;
684         int res, i, fd;
685
686         name = conf_get_autoconfig_name();
687         conf_read_simple(name, S_DEF_AUTO);
688
689         if (chdir("include/config"))
690                 return 1;
691
692         res = 0;
693         for_all_symbols(i, sym) {
694                 sym_calc_value(sym);
695                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
696                         continue;
697                 if (sym->flags & SYMBOL_WRITE) {
698                         if (sym->flags & SYMBOL_DEF_AUTO) {
699                                 /*
700                                  * symbol has old and new value,
701                                  * so compare them...
702                                  */
703                                 switch (sym->type) {
704                                 case S_BOOLEAN:
705                                 case S_TRISTATE:
706                                         if (sym_get_tristate_value(sym) ==
707                                             sym->def[S_DEF_AUTO].tri)
708                                                 continue;
709                                         break;
710                                 case S_STRING:
711                                 case S_HEX:
712                                 case S_INT:
713                                         if (!strcmp(sym_get_string_value(sym),
714                                                     sym->def[S_DEF_AUTO].val))
715                                                 continue;
716                                         break;
717                                 default:
718                                         break;
719                                 }
720                         } else {
721                                 /*
722                                  * If there is no old value, only 'no' (unset)
723                                  * is allowed as new value.
724                                  */
725                                 switch (sym->type) {
726                                 case S_BOOLEAN:
727                                 case S_TRISTATE:
728                                         if (sym_get_tristate_value(sym) == no)
729                                                 continue;
730                                         break;
731                                 default:
732                                         break;
733                                 }
734                         }
735                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
736                         /* There is neither an old nor a new value. */
737                         continue;
738                 /* else
739                  *      There is an old value, but no new value ('no' (unset)
740                  *      isn't saved in auto.conf, so the old value is always
741                  *      different from 'no').
742                  */
743
744                 /* Replace all '_' and append ".h" */
745                 s = sym->name;
746                 d = path;
747                 while ((c = *s++)) {
748                         c = tolower(c);
749                         *d++ = (c == '_') ? '/' : c;
750                 }
751                 strcpy(d, ".h");
752
753                 /* Assume directory path already exists. */
754                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
755                 if (fd == -1) {
756                         if (errno != ENOENT) {
757                                 res = 1;
758                                 break;
759                         }
760                         /*
761                          * Create directory components,
762                          * unless they exist already.
763                          */
764                         d = path;
765                         while ((d = strchr(d, '/'))) {
766                                 *d = 0;
767                                 if (stat(path, &sb) && mkdir(path, 0755)) {
768                                         res = 1;
769                                         goto out;
770                                 }
771                                 *d++ = '/';
772                         }
773                         /* Try it again. */
774                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
775                         if (fd == -1) {
776                                 res = 1;
777                                 break;
778                         }
779                 }
780                 close(fd);
781         }
782 out:
783         if (chdir("../.."))
784                 return 1;
785
786         return res;
787 }
788
789 int conf_write_autoconf(void)
790 {
791         struct symbol *sym;
792         const char *str;
793         const char *name;
794         FILE *out, *tristate, *out_h;
795         time_t now;
796         int i;
797
798         sym_clear_all_valid();
799
800         file_write_dep("include/config/auto.conf.cmd");
801
802         if (conf_split_config())
803                 return 1;
804
805         out = fopen(".tmpconfig", "w");
806         if (!out)
807                 return 1;
808
809         tristate = fopen(".tmpconfig_tristate", "w");
810         if (!tristate) {
811                 fclose(out);
812                 return 1;
813         }
814
815         out_h = fopen(".tmpconfig.h", "w");
816         if (!out_h) {
817                 fclose(out);
818                 fclose(tristate);
819                 return 1;
820         }
821
822         time(&now);
823         fprintf(out, "#\n"
824                      "# Automatically generated make config: don't edit\n"
825                      "# %s\n"
826                      "# %s"
827                      "#\n",
828                      rootmenu.prompt->text, ctime(&now));
829         fprintf(tristate, "#\n"
830                           "# Automatically generated - do not edit\n"
831                           "\n");
832         fprintf(out_h, "/*\n"
833                        " * Automatically generated C config: don't edit\n"
834                        " * %s\n"
835                        " * %s"
836                        " */\n",
837                        rootmenu.prompt->text, ctime(&now));
838
839         for_all_symbols(i, sym) {
840                 sym_calc_value(sym);
841                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
842                         continue;
843
844                 /* write symbol to config file */
845                 conf_write_symbol(sym, sym->type, out, false);
846
847                 /* update autoconf and tristate files */
848                 switch (sym->type) {
849                 case S_BOOLEAN:
850                 case S_TRISTATE:
851                         switch (sym_get_tristate_value(sym)) {
852                         case no:
853                                 break;
854                         case mod:
855                                 fprintf(tristate, "%s%s=M\n",
856                                     CONFIG_, sym->name);
857                                 fprintf(out_h, "#define %s%s_MODULE 1\n",
858                                     CONFIG_, sym->name);
859                                 break;
860                         case yes:
861                                 if (sym->type == S_TRISTATE)
862                                         fprintf(tristate,"%s%s=Y\n",
863                                             CONFIG_, sym->name);
864                                 fprintf(out_h, "#define %s%s 1\n",
865                                     CONFIG_, sym->name);
866                                 break;
867                         }
868                         break;
869                 case S_STRING:
870                         conf_write_string(true, sym->name, sym_get_string_value(sym), out_h);
871                         break;
872                 case S_HEX:
873                         str = sym_get_string_value(sym);
874                         if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
875                                 fprintf(out_h, "#define %s%s 0x%s\n",
876                                     CONFIG_, sym->name, str);
877                                 break;
878                         }
879                 case S_INT:
880                         str = sym_get_string_value(sym);
881                         fprintf(out_h, "#define %s%s %s\n",
882                             CONFIG_, sym->name, str);
883                         break;
884                 default:
885                         break;
886                 }
887         }
888         fclose(out);
889         fclose(tristate);
890         fclose(out_h);
891
892         name = getenv("KCONFIG_AUTOHEADER");
893         if (!name)
894                 name = "include/generated/autoconf.h";
895         if (rename(".tmpconfig.h", name))
896                 return 1;
897         name = getenv("KCONFIG_TRISTATE");
898         if (!name)
899                 name = "include/config/tristate.conf";
900         if (rename(".tmpconfig_tristate", name))
901                 return 1;
902         name = conf_get_autoconfig_name();
903         /*
904          * This must be the last step, kbuild has a dependency on auto.conf
905          * and this marks the successful completion of the previous steps.
906          */
907         if (rename(".tmpconfig", name))
908                 return 1;
909
910         return 0;
911 }
912
913 static int sym_change_count;
914 static void (*conf_changed_callback)(void);
915
916 void sym_set_change_count(int count)
917 {
918         int _sym_change_count = sym_change_count;
919         sym_change_count = count;
920         if (conf_changed_callback &&
921             (bool)_sym_change_count != (bool)count)
922                 conf_changed_callback();
923 }
924
925 void sym_add_change_count(int count)
926 {
927         sym_set_change_count(count + sym_change_count);
928 }
929
930 bool conf_get_changed(void)
931 {
932         return sym_change_count;
933 }
934
935 void conf_set_changed_callback(void (*fn)(void))
936 {
937         conf_changed_callback = fn;
938 }
939
940 static void randomize_choice_values(struct symbol *csym)
941 {
942         struct property *prop;
943         struct symbol *sym;
944         struct expr *e;
945         int cnt, def;
946
947         /*
948          * If choice is mod then we may have more items slected
949          * and if no then no-one.
950          * In both cases stop.
951          */
952         if (csym->curr.tri != yes)
953                 return;
954
955         prop = sym_get_choice_prop(csym);
956
957         /* count entries in choice block */
958         cnt = 0;
959         expr_list_for_each_sym(prop->expr, e, sym)
960                 cnt++;
961
962         /*
963          * find a random value and set it to yes,
964          * set the rest to no so we have only one set
965          */
966         def = (rand() % cnt);
967
968         cnt = 0;
969         expr_list_for_each_sym(prop->expr, e, sym) {
970                 if (def == cnt++) {
971                         sym->def[S_DEF_USER].tri = yes;
972                         csym->def[S_DEF_USER].val = sym;
973                 }
974                 else {
975                         sym->def[S_DEF_USER].tri = no;
976                 }
977         }
978         csym->flags |= SYMBOL_DEF_USER;
979         /* clear VALID to get value calculated */
980         csym->flags &= ~(SYMBOL_VALID);
981 }
982
983 static void set_all_choice_values(struct symbol *csym)
984 {
985         struct property *prop;
986         struct symbol *sym;
987         struct expr *e;
988
989         prop = sym_get_choice_prop(csym);
990
991         /*
992          * Set all non-assinged choice values to no
993          */
994         expr_list_for_each_sym(prop->expr, e, sym) {
995                 if (!sym_has_value(sym))
996                         sym->def[S_DEF_USER].tri = no;
997         }
998         csym->flags |= SYMBOL_DEF_USER;
999         /* clear VALID to get value calculated */
1000         csym->flags &= ~(SYMBOL_VALID);
1001 }
1002
1003 void conf_set_all_new_symbols(enum conf_def_mode mode)
1004 {
1005         struct symbol *sym, *csym;
1006         int i, cnt;
1007
1008         for_all_symbols(i, sym) {
1009                 if (sym_has_value(sym))
1010                         continue;
1011                 switch (sym_get_type(sym)) {
1012                 case S_BOOLEAN:
1013                 case S_TRISTATE:
1014                         switch (mode) {
1015                         case def_yes:
1016                                 sym->def[S_DEF_USER].tri = yes;
1017                                 break;
1018                         case def_mod:
1019                                 sym->def[S_DEF_USER].tri = mod;
1020                                 break;
1021                         case def_no:
1022                                 sym->def[S_DEF_USER].tri = no;
1023                                 break;
1024                         case def_random:
1025                                 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1026                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1027                                 break;
1028                         default:
1029                                 continue;
1030                         }
1031                         if (!(sym_is_choice(sym) && mode == def_random))
1032                                 sym->flags |= SYMBOL_DEF_USER;
1033                         break;
1034                 default:
1035                         break;
1036                 }
1037
1038         }
1039
1040         sym_clear_all_valid();
1041
1042         /*
1043          * We have different type of choice blocks.
1044          * If curr.tri equal to mod then we can select several
1045          * choice symbols in one block.
1046          * In this case we do nothing.
1047          * If curr.tri equal yes then only one symbol can be
1048          * selected in a choice block and we set it to yes,
1049          * and the rest to no.
1050          */
1051         for_all_symbols(i, csym) {
1052                 if (sym_has_value(csym) || !sym_is_choice(csym))
1053                         continue;
1054
1055                 sym_calc_value(csym);
1056                 if (mode == def_random)
1057                         randomize_choice_values(csym);
1058                 else
1059                         set_all_choice_values(csym);
1060         }
1061 }