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