kconfig: do not hardcode "include/config/auto.conf" filename
[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 <fcntl.h>
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <time.h>
13 #include <unistd.h>
14
15 #define LKC_DIRECT_LINK
16 #include "lkc.h"
17
18 static void conf_warning(const char *fmt, ...)
19         __attribute__ ((format (printf, 1, 2)));
20
21 static const char *conf_filename;
22 static int conf_lineno, conf_warnings, conf_unsaved;
23
24 const char conf_defname[] = "arch/$ARCH/defconfig";
25
26 static void conf_warning(const char *fmt, ...)
27 {
28         va_list ap;
29         va_start(ap, fmt);
30         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
31         vfprintf(stderr, fmt, ap);
32         fprintf(stderr, "\n");
33         va_end(ap);
34         conf_warnings++;
35 }
36
37 const char *conf_get_configname(void)
38 {
39         char *name = getenv("KCONFIG_CONFIG");
40
41         return name ? name : ".config";
42 }
43
44 const char *conf_get_autoconfig_name(void)
45 {
46         char *name = getenv("KCONFIG_AUTOCONFIG");
47
48         return name ? name : "include/config/auto.conf";
49 }
50
51 static char *conf_expand_value(const char *in)
52 {
53         struct symbol *sym;
54         const char *src;
55         static char res_value[SYMBOL_MAXLENGTH];
56         char *dst, name[SYMBOL_MAXLENGTH];
57
58         res_value[0] = 0;
59         dst = name;
60         while ((src = strchr(in, '$'))) {
61                 strncat(res_value, in, src - in);
62                 src++;
63                 dst = name;
64                 while (isalnum(*src) || *src == '_')
65                         *dst++ = *src++;
66                 *dst = 0;
67                 sym = sym_lookup(name, 0);
68                 sym_calc_value(sym);
69                 strcat(res_value, sym_get_string_value(sym));
70                 in = src;
71         }
72         strcat(res_value, in);
73
74         return res_value;
75 }
76
77 char *conf_get_default_confname(void)
78 {
79         struct stat buf;
80         static char fullname[PATH_MAX+1];
81         char *env, *name;
82
83         name = conf_expand_value(conf_defname);
84         env = getenv(SRCTREE);
85         if (env) {
86                 sprintf(fullname, "%s/%s", env, name);
87                 if (!stat(fullname, &buf))
88                         return fullname;
89         }
90         return name;
91 }
92
93 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
94 {
95         char *p2;
96
97         switch (sym->type) {
98         case S_TRISTATE:
99                 if (p[0] == 'm') {
100                         sym->def[def].tri = mod;
101                         sym->flags |= def_flags;
102                         break;
103                 }
104         case S_BOOLEAN:
105                 if (p[0] == 'y') {
106                         sym->def[def].tri = yes;
107                         sym->flags |= def_flags;
108                         break;
109                 }
110                 if (p[0] == 'n') {
111                         sym->def[def].tri = no;
112                         sym->flags |= def_flags;
113                         break;
114                 }
115                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
116                 break;
117         case S_OTHER:
118                 if (*p != '"') {
119                         for (p2 = p; *p2 && !isspace(*p2); p2++)
120                                 ;
121                         sym->type = S_STRING;
122                         goto done;
123                 }
124         case S_STRING:
125                 if (*p++ != '"')
126                         break;
127                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
128                         if (*p2 == '"') {
129                                 *p2 = 0;
130                                 break;
131                         }
132                         memmove(p2, p2 + 1, strlen(p2));
133                 }
134                 if (!p2) {
135                         conf_warning("invalid string found");
136                         return 1;
137                 }
138         case S_INT:
139         case S_HEX:
140         done:
141                 if (sym_string_valid(sym, p)) {
142                         sym->def[def].val = strdup(p);
143                         sym->flags |= def_flags;
144                 } else {
145                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
146                         return 1;
147                 }
148                 break;
149         default:
150                 ;
151         }
152         return 0;
153 }
154
155 int conf_read_simple(const char *name, int def)
156 {
157         FILE *in = NULL;
158         char line[1024];
159         char *p, *p2;
160         struct symbol *sym;
161         int i, def_flags;
162
163         if (name) {
164                 in = zconf_fopen(name);
165         } else {
166                 struct property *prop;
167
168                 name = conf_get_configname();
169                 in = zconf_fopen(name);
170                 if (in)
171                         goto load;
172                 sym_add_change_count(1);
173                 if (!sym_defconfig_list)
174                         return 1;
175
176                 for_all_defaults(sym_defconfig_list, prop) {
177                         if (expr_calc_value(prop->visible.expr) == no ||
178                             prop->expr->type != E_SYMBOL)
179                                 continue;
180                         name = conf_expand_value(prop->expr->left.sym->name);
181                         in = zconf_fopen(name);
182                         if (in) {
183                                 printf(_("#\n"
184                                          "# using defaults found in %s\n"
185                                          "#\n"), name);
186                                 goto load;
187                         }
188                 }
189         }
190         if (!in)
191                 return 1;
192
193 load:
194         conf_filename = name;
195         conf_lineno = 0;
196         conf_warnings = 0;
197         conf_unsaved = 0;
198
199         def_flags = SYMBOL_DEF << def;
200         for_all_symbols(i, sym) {
201                 sym->flags |= SYMBOL_CHANGED;
202                 sym->flags &= ~(def_flags|SYMBOL_VALID);
203                 if (sym_is_choice(sym))
204                         sym->flags |= def_flags;
205                 switch (sym->type) {
206                 case S_INT:
207                 case S_HEX:
208                 case S_STRING:
209                         if (sym->def[def].val)
210                                 free(sym->def[def].val);
211                 default:
212                         sym->def[def].val = NULL;
213                         sym->def[def].tri = no;
214                 }
215         }
216
217         while (fgets(line, sizeof(line), in)) {
218                 conf_lineno++;
219                 sym = NULL;
220                 switch (line[0]) {
221                 case '#':
222                         if (memcmp(line + 2, "CONFIG_", 7))
223                                 continue;
224                         p = strchr(line + 9, ' ');
225                         if (!p)
226                                 continue;
227                         *p++ = 0;
228                         if (strncmp(p, "is not set", 10))
229                                 continue;
230                         if (def == S_DEF_USER) {
231                                 sym = sym_find(line + 9);
232                                 if (!sym) {
233                                         sym_add_change_count(1);
234                                         break;
235                                 }
236                         } else {
237                                 sym = sym_lookup(line + 9, 0);
238                                 if (sym->type == S_UNKNOWN)
239                                         sym->type = S_BOOLEAN;
240                         }
241                         if (sym->flags & def_flags) {
242                                 conf_warning("override: reassigning to symbol %s", sym->name);
243                         }
244                         switch (sym->type) {
245                         case S_BOOLEAN:
246                         case S_TRISTATE:
247                                 sym->def[def].tri = no;
248                                 sym->flags |= def_flags;
249                                 break;
250                         default:
251                                 ;
252                         }
253                         break;
254                 case 'C':
255                         if (memcmp(line, "CONFIG_", 7)) {
256                                 conf_warning("unexpected data");
257                                 continue;
258                         }
259                         p = strchr(line + 7, '=');
260                         if (!p)
261                                 continue;
262                         *p++ = 0;
263                         p2 = strchr(p, '\n');
264                         if (p2) {
265                                 *p2-- = 0;
266                                 if (*p2 == '\r')
267                                         *p2 = 0;
268                         }
269                         if (def == S_DEF_USER) {
270                                 sym = sym_find(line + 7);
271                                 if (!sym) {
272                                         sym_add_change_count(1);
273                                         break;
274                                 }
275                         } else {
276                                 sym = sym_lookup(line + 7, 0);
277                                 if (sym->type == S_UNKNOWN)
278                                         sym->type = S_OTHER;
279                         }
280                         if (sym->flags & def_flags) {
281                                 conf_warning("override: reassigning to symbol %s", sym->name);
282                         }
283                         if (conf_set_sym_val(sym, def, def_flags, p))
284                                 continue;
285                         break;
286                 case '\r':
287                 case '\n':
288                         break;
289                 default:
290                         conf_warning("unexpected data");
291                         continue;
292                 }
293                 if (sym && sym_is_choice_value(sym)) {
294                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
295                         switch (sym->def[def].tri) {
296                         case no:
297                                 break;
298                         case mod:
299                                 if (cs->def[def].tri == yes) {
300                                         conf_warning("%s creates inconsistent choice state", sym->name);
301                                         cs->flags &= ~def_flags;
302                                 }
303                                 break;
304                         case yes:
305                                 if (cs->def[def].tri != no)
306                                         conf_warning("override: %s changes choice state", sym->name);
307                                 cs->def[def].val = sym;
308                                 break;
309                         }
310                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
311                 }
312         }
313         fclose(in);
314
315         if (modules_sym)
316                 sym_calc_value(modules_sym);
317         return 0;
318 }
319
320 int conf_read(const char *name)
321 {
322         struct symbol *sym, *choice_sym;
323         struct property *prop;
324         struct expr *e;
325         int i, flags;
326
327         sym_set_change_count(0);
328
329         if (conf_read_simple(name, S_DEF_USER))
330                 return 1;
331
332         for_all_symbols(i, sym) {
333                 sym_calc_value(sym);
334                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
335                         goto sym_ok;
336                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
337                         /* check that calculated value agrees with saved value */
338                         switch (sym->type) {
339                         case S_BOOLEAN:
340                         case S_TRISTATE:
341                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
342                                         break;
343                                 if (!sym_is_choice(sym))
344                                         goto sym_ok;
345                         default:
346                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
347                                         goto sym_ok;
348                                 break;
349                         }
350                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
351                         /* no previous value and not saved */
352                         goto sym_ok;
353                 conf_unsaved++;
354                 /* maybe print value in verbose mode... */
355         sym_ok:
356                 if (!sym_is_choice(sym))
357                         continue;
358                 /* The choice symbol only has a set value (and thus is not new)
359                  * if all its visible childs have values.
360                  */
361                 prop = sym_get_choice_prop(sym);
362                 flags = sym->flags;
363                 expr_list_for_each_sym(prop->expr, e, choice_sym)
364                         if (choice_sym->visible != no)
365                                 flags &= choice_sym->flags;
366                 sym->flags &= flags | ~SYMBOL_DEF_USER;
367         }
368
369         for_all_symbols(i, sym) {
370                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
371                         /* Reset values of generates values, so they'll appear
372                          * as new, if they should become visible, but that
373                          * doesn't quite work if the Kconfig and the saved
374                          * configuration disagree.
375                          */
376                         if (sym->visible == no && !conf_unsaved)
377                                 sym->flags &= ~SYMBOL_DEF_USER;
378                         switch (sym->type) {
379                         case S_STRING:
380                         case S_INT:
381                         case S_HEX:
382                                 /* Reset a string value if it's out of range */
383                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
384                                         break;
385                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
386                                 conf_unsaved++;
387                                 break;
388                         default:
389                                 break;
390                         }
391                 }
392         }
393
394         sym_add_change_count(conf_warnings || conf_unsaved);
395
396         return 0;
397 }
398
399 int conf_write(const char *name)
400 {
401         FILE *out;
402         struct symbol *sym;
403         struct menu *menu;
404         const char *basename;
405         char dirname[128], tmpname[128], newname[128];
406         int type, l;
407         const char *str;
408         time_t now;
409         int use_timestamp = 1;
410         char *env;
411
412         dirname[0] = 0;
413         if (name && name[0]) {
414                 struct stat st;
415                 char *slash;
416
417                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
418                         strcpy(dirname, name);
419                         strcat(dirname, "/");
420                         basename = conf_get_configname();
421                 } else if ((slash = strrchr(name, '/'))) {
422                         int size = slash - name + 1;
423                         memcpy(dirname, name, size);
424                         dirname[size] = 0;
425                         if (slash[1])
426                                 basename = slash + 1;
427                         else
428                                 basename = conf_get_configname();
429                 } else
430                         basename = name;
431         } else
432                 basename = conf_get_configname();
433
434         sprintf(newname, "%s%s", dirname, basename);
435         env = getenv("KCONFIG_OVERWRITECONFIG");
436         if (!env || !*env) {
437                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
438                 out = fopen(tmpname, "w");
439         } else {
440                 *tmpname = 0;
441                 out = fopen(newname, "w");
442         }
443         if (!out)
444                 return 1;
445
446         sym = sym_lookup("KERNELVERSION", 0);
447         sym_calc_value(sym);
448         time(&now);
449         env = getenv("KCONFIG_NOTIMESTAMP");
450         if (env && *env)
451                 use_timestamp = 0;
452
453         fprintf(out, _("#\n"
454                        "# Automatically generated make config: don't edit\n"
455                        "# Linux kernel version: %s\n"
456                        "%s%s"
457                        "#\n"),
458                      sym_get_string_value(sym),
459                      use_timestamp ? "# " : "",
460                      use_timestamp ? ctime(&now) : "");
461
462         if (!conf_get_changed())
463                 sym_clear_all_valid();
464
465         menu = rootmenu.list;
466         while (menu) {
467                 sym = menu->sym;
468                 if (!sym) {
469                         if (!menu_is_visible(menu))
470                                 goto next;
471                         str = menu_get_prompt(menu);
472                         fprintf(out, "\n"
473                                      "#\n"
474                                      "# %s\n"
475                                      "#\n", str);
476                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
477                         sym_calc_value(sym);
478                         if (!(sym->flags & SYMBOL_WRITE))
479                                 goto next;
480                         sym->flags &= ~SYMBOL_WRITE;
481                         type = sym->type;
482                         if (type == S_TRISTATE) {
483                                 sym_calc_value(modules_sym);
484                                 if (modules_sym->curr.tri == no)
485                                         type = S_BOOLEAN;
486                         }
487                         switch (type) {
488                         case S_BOOLEAN:
489                         case S_TRISTATE:
490                                 switch (sym_get_tristate_value(sym)) {
491                                 case no:
492                                         fprintf(out, "# CONFIG_%s is not set\n", sym->name);
493                                         break;
494                                 case mod:
495                                         fprintf(out, "CONFIG_%s=m\n", sym->name);
496                                         break;
497                                 case yes:
498                                         fprintf(out, "CONFIG_%s=y\n", sym->name);
499                                         break;
500                                 }
501                                 break;
502                         case S_STRING:
503                                 str = sym_get_string_value(sym);
504                                 fprintf(out, "CONFIG_%s=\"", sym->name);
505                                 while (1) {
506                                         l = strcspn(str, "\"\\");
507                                         if (l) {
508                                                 fwrite(str, l, 1, out);
509                                                 str += l;
510                                         }
511                                         if (!*str)
512                                                 break;
513                                         fprintf(out, "\\%c", *str++);
514                                 }
515                                 fputs("\"\n", out);
516                                 break;
517                         case S_HEX:
518                                 str = sym_get_string_value(sym);
519                                 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
520                                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
521                                         break;
522                                 }
523                         case S_INT:
524                                 str = sym_get_string_value(sym);
525                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
526                                 break;
527                         }
528                 }
529
530         next:
531                 if (menu->list) {
532                         menu = menu->list;
533                         continue;
534                 }
535                 if (menu->next)
536                         menu = menu->next;
537                 else while ((menu = menu->parent)) {
538                         if (menu->next) {
539                                 menu = menu->next;
540                                 break;
541                         }
542                 }
543         }
544         fclose(out);
545
546         if (*tmpname) {
547                 strcat(dirname, basename);
548                 strcat(dirname, ".old");
549                 rename(newname, dirname);
550                 if (rename(tmpname, newname))
551                         return 1;
552         }
553
554         printf(_("#\n"
555                  "# configuration written to %s\n"
556                  "#\n"), newname);
557
558         sym_set_change_count(0);
559
560         return 0;
561 }
562
563 int conf_split_config(void)
564 {
565         const char *name;
566         char path[128];
567         char *s, *d, c;
568         struct symbol *sym;
569         struct stat sb;
570         int res, i, fd;
571
572         name = conf_get_autoconfig_name();
573         conf_read_simple(name, S_DEF_AUTO);
574
575         if (chdir("include/config"))
576                 return 1;
577
578         res = 0;
579         for_all_symbols(i, sym) {
580                 sym_calc_value(sym);
581                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
582                         continue;
583                 if (sym->flags & SYMBOL_WRITE) {
584                         if (sym->flags & SYMBOL_DEF_AUTO) {
585                                 /*
586                                  * symbol has old and new value,
587                                  * so compare them...
588                                  */
589                                 switch (sym->type) {
590                                 case S_BOOLEAN:
591                                 case S_TRISTATE:
592                                         if (sym_get_tristate_value(sym) ==
593                                             sym->def[S_DEF_AUTO].tri)
594                                                 continue;
595                                         break;
596                                 case S_STRING:
597                                 case S_HEX:
598                                 case S_INT:
599                                         if (!strcmp(sym_get_string_value(sym),
600                                                     sym->def[S_DEF_AUTO].val))
601                                                 continue;
602                                         break;
603                                 default:
604                                         break;
605                                 }
606                         } else {
607                                 /*
608                                  * If there is no old value, only 'no' (unset)
609                                  * is allowed as new value.
610                                  */
611                                 switch (sym->type) {
612                                 case S_BOOLEAN:
613                                 case S_TRISTATE:
614                                         if (sym_get_tristate_value(sym) == no)
615                                                 continue;
616                                         break;
617                                 default:
618                                         break;
619                                 }
620                         }
621                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
622                         /* There is neither an old nor a new value. */
623                         continue;
624                 /* else
625                  *      There is an old value, but no new value ('no' (unset)
626                  *      isn't saved in auto.conf, so the old value is always
627                  *      different from 'no').
628                  */
629
630                 /* Replace all '_' and append ".h" */
631                 s = sym->name;
632                 d = path;
633                 while ((c = *s++)) {
634                         c = tolower(c);
635                         *d++ = (c == '_') ? '/' : c;
636                 }
637                 strcpy(d, ".h");
638
639                 /* Assume directory path already exists. */
640                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
641                 if (fd == -1) {
642                         if (errno != ENOENT) {
643                                 res = 1;
644                                 break;
645                         }
646                         /*
647                          * Create directory components,
648                          * unless they exist already.
649                          */
650                         d = path;
651                         while ((d = strchr(d, '/'))) {
652                                 *d = 0;
653                                 if (stat(path, &sb) && mkdir(path, 0755)) {
654                                         res = 1;
655                                         goto out;
656                                 }
657                                 *d++ = '/';
658                         }
659                         /* Try it again. */
660                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
661                         if (fd == -1) {
662                                 res = 1;
663                                 break;
664                         }
665                 }
666                 close(fd);
667         }
668 out:
669         if (chdir("../.."))
670                 return 1;
671
672         return res;
673 }
674
675 int conf_write_autoconf(void)
676 {
677         struct symbol *sym;
678         const char *str;
679         const char *name;
680         FILE *out, *out_h;
681         time_t now;
682         int i, l;
683
684         sym_clear_all_valid();
685
686         file_write_dep("include/config/auto.conf.cmd");
687
688         if (conf_split_config())
689                 return 1;
690
691         out = fopen(".tmpconfig", "w");
692         if (!out)
693                 return 1;
694
695         out_h = fopen(".tmpconfig.h", "w");
696         if (!out_h) {
697                 fclose(out);
698                 return 1;
699         }
700
701         sym = sym_lookup("KERNELVERSION", 0);
702         sym_calc_value(sym);
703         time(&now);
704         fprintf(out, "#\n"
705                      "# Automatically generated make config: don't edit\n"
706                      "# Linux kernel version: %s\n"
707                      "# %s"
708                      "#\n",
709                      sym_get_string_value(sym), ctime(&now));
710         fprintf(out_h, "/*\n"
711                        " * Automatically generated C config: don't edit\n"
712                        " * Linux kernel version: %s\n"
713                        " * %s"
714                        " */\n"
715                        "#define AUTOCONF_INCLUDED\n",
716                        sym_get_string_value(sym), ctime(&now));
717
718         for_all_symbols(i, sym) {
719                 sym_calc_value(sym);
720                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
721                         continue;
722                 switch (sym->type) {
723                 case S_BOOLEAN:
724                 case S_TRISTATE:
725                         switch (sym_get_tristate_value(sym)) {
726                         case no:
727                                 break;
728                         case mod:
729                                 fprintf(out, "CONFIG_%s=m\n", sym->name);
730                                 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
731                                 break;
732                         case yes:
733                                 fprintf(out, "CONFIG_%s=y\n", sym->name);
734                                 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
735                                 break;
736                         }
737                         break;
738                 case S_STRING:
739                         str = sym_get_string_value(sym);
740                         fprintf(out, "CONFIG_%s=\"", sym->name);
741                         fprintf(out_h, "#define CONFIG_%s \"", sym->name);
742                         while (1) {
743                                 l = strcspn(str, "\"\\");
744                                 if (l) {
745                                         fwrite(str, l, 1, out);
746                                         fwrite(str, l, 1, out_h);
747                                         str += l;
748                                 }
749                                 if (!*str)
750                                         break;
751                                 fprintf(out, "\\%c", *str);
752                                 fprintf(out_h, "\\%c", *str);
753                                 str++;
754                         }
755                         fputs("\"\n", out);
756                         fputs("\"\n", out_h);
757                         break;
758                 case S_HEX:
759                         str = sym_get_string_value(sym);
760                         if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
761                                 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
762                                 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
763                                 break;
764                         }
765                 case S_INT:
766                         str = sym_get_string_value(sym);
767                         fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
768                         fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
769                         break;
770                 default:
771                         break;
772                 }
773         }
774         fclose(out);
775         fclose(out_h);
776
777         name = getenv("KCONFIG_AUTOHEADER");
778         if (!name)
779                 name = "include/linux/autoconf.h";
780         if (rename(".tmpconfig.h", name))
781                 return 1;
782         name = conf_get_autoconfig_name();
783         /*
784          * This must be the last step, kbuild has a dependency on auto.conf
785          * and this marks the successful completion of the previous steps.
786          */
787         if (rename(".tmpconfig", name))
788                 return 1;
789
790         return 0;
791 }
792
793 static int sym_change_count;
794 static void (*conf_changed_callback)(void);
795
796 void sym_set_change_count(int count)
797 {
798         int _sym_change_count = sym_change_count;
799         sym_change_count = count;
800         if (conf_changed_callback &&
801             (bool)_sym_change_count != (bool)count)
802                 conf_changed_callback();
803 }
804
805 void sym_add_change_count(int count)
806 {
807         sym_set_change_count(count + sym_change_count);
808 }
809
810 bool conf_get_changed(void)
811 {
812         return sym_change_count;
813 }
814
815 void conf_set_changed_callback(void (*fn)(void))
816 {
817         conf_changed_callback = fn;
818 }
819
820
821 void conf_set_all_new_symbols(enum conf_def_mode mode)
822 {
823         struct symbol *sym, *csym;
824         struct property *prop;
825         struct expr *e;
826         int i, cnt, def;
827
828         for_all_symbols(i, sym) {
829                 if (sym_has_value(sym))
830                         continue;
831                 switch (sym_get_type(sym)) {
832                 case S_BOOLEAN:
833                 case S_TRISTATE:
834                         switch (mode) {
835                         case def_yes:
836                                 sym->def[S_DEF_USER].tri = yes;
837                                 break;
838                         case def_mod:
839                                 sym->def[S_DEF_USER].tri = mod;
840                                 break;
841                         case def_no:
842                                 sym->def[S_DEF_USER].tri = no;
843                                 break;
844                         case def_random:
845                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % 3);
846                                 break;
847                         default:
848                                 continue;
849                         }
850                         if (!(sym_is_choice(sym) && mode == def_random))
851                                 sym->flags |= SYMBOL_DEF_USER;
852                         break;
853                 default:
854                         break;
855                 }
856
857         }
858
859         sym_clear_all_valid();
860
861         if (mode != def_random)
862                 return;
863         /*
864          * We have different type of choice blocks.
865          * If curr.tri equal to mod then we can select several
866          * choice symbols in one block.
867          * In this case we do nothing.
868          * If curr.tri equal yes then only one symbol can be
869          * selected in a choice block and we set it to yes,
870          * and the rest to no.
871          */
872         for_all_symbols(i, csym) {
873                 if (sym_has_value(csym) || !sym_is_choice(csym))
874                         continue;
875
876                 sym_calc_value(csym);
877
878                 if (csym->curr.tri != yes)
879                         continue;
880
881                 prop = sym_get_choice_prop(csym);
882
883                 /* count entries in choice block */
884                 cnt = 0;
885                 expr_list_for_each_sym(prop->expr, e, sym)
886                         cnt++;
887
888                 /*
889                  * find a random value and set it to yes,
890                  * set the rest to no so we have only one set
891                  */
892                 def = (rand() % cnt);
893
894                 cnt = 0;
895                 expr_list_for_each_sym(prop->expr, e, sym) {
896                         if (def == cnt++) {
897                                 sym->def[S_DEF_USER].tri = yes;
898                                 csym->def[S_DEF_USER].val = sym;
899                         }
900                         else {
901                                 sym->def[S_DEF_USER].tri = no;
902                         }
903                 }
904                 csym->flags |= SYMBOL_DEF_USER;
905                 /* clear VALID to get value calculated */
906                 csym->flags &= ~(SYMBOL_VALID);
907         }
908 }