carl9170 firmware: implement endpoint halt req/clear and get endpoint status
[carl9170fw.git] / config / 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 <stdarg.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 #include <time.h>
15 #include <unistd.h>
16
17 #include "lkc.h"
18
19 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[] = "include/generated/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/generated/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                 /* fall through */
132         case S_BOOLEAN:
133                 if (p[0] == 'y') {
134                         sym->def[def].tri = yes;
135                         sym->flags |= def_flags;
136                         break;
137                 }
138                 if (p[0] == 'n') {
139                         sym->def[def].tri = no;
140                         sym->flags |= def_flags;
141                         break;
142                 }
143                 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
144                 return 1;
145         case S_OTHER:
146                 if (*p != '"') {
147                         for (p2 = p; *p2 && !isspace(*p2); p2++)
148                                 ;
149                         sym->type = S_STRING;
150                         goto done;
151                 }
152                 /* fall through */
153         case S_STRING:
154                 if (*p++ != '"')
155                         break;
156                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
157                         if (*p2 == '"') {
158                                 *p2 = 0;
159                                 break;
160                         }
161                         memmove(p2, p2 + 1, strlen(p2));
162                 }
163                 if (!p2) {
164                         conf_warning("invalid string found");
165                         return 1;
166                 }
167                 /* fall through */
168         case S_INT:
169         case S_HEX:
170         done:
171                 if (sym_string_valid(sym, p)) {
172                         sym->def[def].val = strdup(p);
173                         sym->flags |= def_flags;
174                 } else {
175                         conf_warning("symbol value '%s' invalid for %s", p, sym->name);
176                         return 1;
177                 }
178                 break;
179         default:
180                 ;
181         }
182         return 0;
183 }
184
185 #define LINE_GROWTH 16
186 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
187 {
188         char *nline;
189         size_t new_size = slen + 1;
190         if (new_size > *n) {
191                 new_size += LINE_GROWTH - 1;
192                 new_size *= 2;
193                 nline = realloc(*lineptr, new_size);
194                 if (!nline)
195                         return -1;
196
197                 *lineptr = nline;
198                 *n = new_size;
199         }
200
201         (*lineptr)[slen] = c;
202
203         return 0;
204 }
205
206 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
207 {
208         char *line = *lineptr;
209         size_t slen = 0;
210
211         for (;;) {
212                 int c = getc(stream);
213
214                 switch (c) {
215                 case '\n':
216                         if (add_byte(c, &line, slen, n) < 0)
217                                 goto e_out;
218                         slen++;
219                         /* fall through */
220                 case EOF:
221                         if (add_byte('\0', &line, slen, n) < 0)
222                                 goto e_out;
223                         *lineptr = line;
224                         if (slen == 0)
225                                 return -1;
226                         return slen;
227                 default:
228                         if (add_byte(c, &line, slen, n) < 0)
229                                 goto e_out;
230                         slen++;
231                 }
232         }
233
234 e_out:
235         line[slen-1] = '\0';
236         *lineptr = line;
237         return -1;
238 }
239
240 int conf_read_simple(const char *name, int def)
241 {
242         FILE *in = NULL;
243         char   *line = NULL;
244         size_t  line_asize = 0;
245         char *p, *p2;
246         struct symbol *sym;
247         int i, def_flags;
248
249         if (name) {
250                 in = zconf_fopen(name);
251         } else {
252                 struct property *prop;
253
254                 name = conf_get_configname();
255                 in = zconf_fopen(name);
256                 if (in)
257                         goto load;
258                 sym_add_change_count(1);
259                 if (!sym_defconfig_list) {
260                         if (modules_sym)
261                                 sym_calc_value(modules_sym);
262                         return 1;
263                 }
264
265                 for_all_defaults(sym_defconfig_list, prop) {
266                         if (expr_calc_value(prop->visible.expr) == no ||
267                             prop->expr->type != E_SYMBOL)
268                                 continue;
269                         name = conf_expand_value(prop->expr->left.sym->name);
270                         in = zconf_fopen(name);
271                         if (in) {
272                                 conf_message(_("using defaults found in %s"),
273                                          name);
274                                 goto load;
275                         }
276                 }
277         }
278         if (!in)
279                 return 1;
280
281 load:
282         conf_filename = name;
283         conf_lineno = 0;
284         conf_warnings = 0;
285         conf_unsaved = 0;
286
287         def_flags = SYMBOL_DEF << def;
288         for_all_symbols(i, sym) {
289                 sym->flags |= SYMBOL_CHANGED;
290                 sym->flags &= ~(def_flags|SYMBOL_VALID);
291                 if (sym_is_choice(sym))
292                         sym->flags |= def_flags;
293                 switch (sym->type) {
294                 case S_INT:
295                 case S_HEX:
296                 case S_STRING:
297                         if (sym->def[def].val)
298                                 free(sym->def[def].val);
299                         /* fall through */
300                 default:
301                         sym->def[def].val = NULL;
302                         sym->def[def].tri = no;
303                 }
304         }
305
306         while (compat_getline(&line, &line_asize, in) != -1) {
307                 conf_lineno++;
308                 sym = NULL;
309                 if (line[0] == '#') {
310                         if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
311                                 continue;
312                         p = strchr(line + 2 + strlen(CONFIG_), ' ');
313                         if (!p)
314                                 continue;
315                         *p++ = 0;
316                         if (strncmp(p, "is not set", 10))
317                                 continue;
318                         if (def == S_DEF_USER) {
319                                 sym = sym_find(line + 2 + strlen(CONFIG_));
320                                 if (!sym) {
321                                         sym_add_change_count(1);
322                                         goto setsym;
323                                 }
324                         } else {
325                                 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
326                                 if (sym->type == S_UNKNOWN)
327                                         sym->type = S_BOOLEAN;
328                         }
329                         if (sym->flags & def_flags) {
330                                 conf_warning("override: reassigning to symbol %s", sym->name);
331                         }
332                         switch (sym->type) {
333                         case S_BOOLEAN:
334                         case S_TRISTATE:
335                                 sym->def[def].tri = no;
336                                 sym->flags |= def_flags;
337                                 break;
338                         default:
339                                 ;
340                         }
341                 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
342                         p = strchr(line + strlen(CONFIG_), '=');
343                         if (!p)
344                                 continue;
345                         *p++ = 0;
346                         p2 = strchr(p, '\n');
347                         if (p2) {
348                                 *p2-- = 0;
349                                 if (*p2 == '\r')
350                                         *p2 = 0;
351                         }
352                         if (def == S_DEF_USER) {
353                                 sym = sym_find(line + strlen(CONFIG_));
354                                 if (!sym) {
355                                         sym_add_change_count(1);
356                                         goto setsym;
357                                 }
358                         } else {
359                                 sym = sym_lookup(line + strlen(CONFIG_), 0);
360                                 if (sym->type == S_UNKNOWN)
361                                         sym->type = S_OTHER;
362                         }
363                         if (sym->flags & def_flags) {
364                                 conf_warning("override: reassigning to symbol %s", sym->name);
365                         }
366                         if (conf_set_sym_val(sym, def, def_flags, p))
367                                 continue;
368                 } else {
369                         if (line[0] != '\r' && line[0] != '\n')
370                                 conf_warning("unexpected data");
371                         continue;
372                 }
373 setsym:
374                 if (sym && sym_is_choice_value(sym)) {
375                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
376                         switch (sym->def[def].tri) {
377                         case no:
378                                 break;
379                         case mod:
380                                 if (cs->def[def].tri == yes) {
381                                         conf_warning("%s creates inconsistent choice state", sym->name);
382                                         cs->flags &= ~def_flags;
383                                 }
384                                 break;
385                         case yes:
386                                 if (cs->def[def].tri != no)
387                                         conf_warning("override: %s changes choice state", sym->name);
388                                 cs->def[def].val = sym;
389                                 break;
390                         }
391                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
392                 }
393         }
394         free(line);
395         fclose(in);
396
397         if (modules_sym)
398                 sym_calc_value(modules_sym);
399         return 0;
400 }
401
402 int conf_read(const char *name)
403 {
404         struct symbol *sym;
405         int i;
406
407         sym_set_change_count(0);
408
409         if (conf_read_simple(name, S_DEF_USER))
410                 return 1;
411
412         for_all_symbols(i, sym) {
413                 sym_calc_value(sym);
414                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
415                         continue;
416                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
417                         /* check that calculated value agrees with saved value */
418                         switch (sym->type) {
419                         case S_BOOLEAN:
420                         case S_TRISTATE:
421                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
422                                         break;
423                                 if (!sym_is_choice(sym))
424                                         continue;
425                                 /* fall through */
426                         default:
427                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
428                                         continue;
429                                 break;
430                         }
431                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
432                         /* no previous value and not saved */
433                         continue;
434                 conf_unsaved++;
435                 /* maybe print value in verbose mode... */
436         }
437
438         for_all_symbols(i, sym) {
439                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
440                         /* Reset values of generates values, so they'll appear
441                          * as new, if they should become visible, but that
442                          * doesn't quite work if the Kconfig and the saved
443                          * configuration disagree.
444                          */
445                         if (sym->visible == no && !conf_unsaved)
446                                 sym->flags &= ~SYMBOL_DEF_USER;
447                         switch (sym->type) {
448                         case S_STRING:
449                         case S_INT:
450                         case S_HEX:
451                                 /* Reset a string value if it's out of range */
452                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
453                                         break;
454                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
455                                 conf_unsaved++;
456                                 break;
457                         default:
458                                 break;
459                         }
460                 }
461         }
462
463         sym_add_change_count(conf_warnings || conf_unsaved);
464
465         return 0;
466 }
467
468 /*
469  * Kconfig configuration printer
470  *
471  * This printer is used when generating the resulting configuration after
472  * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
473  * passing a non-NULL argument to the printer.
474  *
475  */
476 static void
477 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
478 {
479
480         switch (sym->type) {
481         case S_BOOLEAN:
482         case S_TRISTATE:
483                 if (*value == 'n') {
484                         bool skip_unset = (arg != NULL);
485
486                         if (!skip_unset)
487                                 fprintf(fp, "# %s%s is not set\n",
488                                     CONFIG_, sym->name);
489                         return;
490                 }
491                 break;
492         default:
493                 break;
494         }
495
496         fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
497 }
498
499 static void
500 kconfig_print_cmake_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
501 {
502
503         switch (sym->type) {
504         case S_BOOLEAN:
505         case S_TRISTATE:
506                 if (*value == 'n') {
507                         bool skip_unset = (arg != NULL);
508
509                         if (!skip_unset)
510                                 fprintf(fp, "set(%s%s false)\n",
511                                         CONFIG_, sym->name, value);
512                         return;
513                 } else if (*value == 'm') {
514                         abort();
515                 } else {
516                         fprintf(fp, "set(%s%s true)\n", CONFIG_, sym->name, value);
517                 }
518                 break;
519         case S_HEX: {
520                 const char *prefix = "";
521
522                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
523                         prefix = "0x";
524                 fprintf(fp, "set(%s%s %s%s)\n",
525                     CONFIG_, sym->name, prefix, value);
526                 break;
527         }
528         case S_STRING:
529         case S_INT:
530                 fprintf(fp, "set(%s%s %s)\n",
531                     CONFIG_, sym->name, value);
532                 break;
533         default:
534                 break;
535         }
536
537 }
538
539 static void
540 kconfig_print_comment(FILE *fp, const char *value, void *arg)
541 {
542         const char *p = value;
543         size_t l;
544
545         for (;;) {
546                 l = strcspn(p, "\n");
547                 fprintf(fp, "#");
548                 if (l) {
549                         fprintf(fp, " ");
550                         xfwrite(p, l, 1, fp);
551                         p += l;
552                 }
553                 fprintf(fp, "\n");
554                 if (*p++ == '\0')
555                         break;
556         }
557 }
558
559 static struct conf_printer kconfig_printer_cb =
560 {
561         .print_symbol = kconfig_print_symbol,
562         .print_comment = kconfig_print_comment,
563 };
564
565 static struct conf_printer kconfig_printer_cmake_cb =
566 {
567         .print_symbol = kconfig_print_cmake_symbol,
568         .print_comment = kconfig_print_comment,
569 };
570
571 /*
572  * Header printer
573  *
574  * This printer is used when generating the `include/generated/autoconf.h' file.
575  */
576 static void
577 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
578 {
579
580         switch (sym->type) {
581         case S_BOOLEAN:
582         case S_TRISTATE: {
583                 const char *suffix = "";
584
585                 switch (*value) {
586                 case 'n':
587                         break;
588                 case 'm':
589                         suffix = "_MODULE";
590                         /* fall through */
591                 default:
592                         fprintf(fp, "#define %s%s%s 1\n",
593                             CONFIG_, sym->name, suffix);
594                 }
595                 break;
596         }
597         case S_HEX: {
598                 const char *prefix = "";
599
600                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
601                         prefix = "0x";
602                 fprintf(fp, "#define %s%s %s%s\n",
603                     CONFIG_, sym->name, prefix, value);
604                 break;
605         }
606         case S_STRING:
607         case S_INT:
608                 fprintf(fp, "#define %s%s %s\n",
609                     CONFIG_, sym->name, value);
610                 break;
611         default:
612                 break;
613         }
614
615 }
616
617 static void
618 header_print_comment(FILE *fp, const char *value, void *arg)
619 {
620         const char *p = value;
621         size_t l;
622
623         fprintf(fp, "/*\n");
624         for (;;) {
625                 l = strcspn(p, "\n");
626                 fprintf(fp, " *");
627                 if (l) {
628                         fprintf(fp, " ");
629                         xfwrite(p, l, 1, fp);
630                         p += l;
631                 }
632                 fprintf(fp, "\n");
633                 if (*p++ == '\0')
634                         break;
635         }
636         fprintf(fp, " */\n");
637 }
638
639 static struct conf_printer header_printer_cb =
640 {
641         .print_symbol = header_print_symbol,
642         .print_comment = header_print_comment,
643 };
644
645 /*
646  * Tristate printer
647  *
648  * This printer is used when generating the `include/generated/tristate.conf' file.
649  */
650 static void
651 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
652 {
653
654         if (sym->type == S_TRISTATE && *value != 'n')
655                 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
656 }
657
658 static struct conf_printer tristate_printer_cb =
659 {
660         .print_symbol = tristate_print_symbol,
661         .print_comment = kconfig_print_comment,
662 };
663
664 static void conf_write_symbol(FILE *fp, struct symbol *sym,
665                               struct conf_printer *printer, void *printer_arg)
666 {
667         const char *str;
668
669         switch (sym->type) {
670         case S_OTHER:
671         case S_UNKNOWN:
672                 break;
673         case S_STRING:
674                 str = sym_get_string_value(sym);
675                 str = sym_escape_string_value(str);
676                 printer->print_symbol(fp, sym, str, printer_arg);
677                 free((void *)str);
678                 break;
679         default:
680                 str = sym_get_string_value(sym);
681                 printer->print_symbol(fp, sym, str, printer_arg);
682         }
683 }
684
685 static void
686 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
687 {
688         char buf[256];
689
690         snprintf(buf, sizeof(buf),
691             "\n"
692             "Automatically generated file; DO NOT EDIT.\n"
693             "%s\n",
694             rootmenu.prompt->text);
695
696         printer->print_comment(fp, buf, printer_arg);
697 }
698
699 /*
700  * Write out a minimal config.
701  * All values that has default values are skipped as this is redundant.
702  */
703 int conf_write_defconfig(const char *filename)
704 {
705         struct symbol *sym;
706         struct menu *menu;
707         FILE *out;
708
709         out = fopen(filename, "w");
710         if (!out)
711                 return 1;
712
713         sym_clear_all_valid();
714
715         /* Traverse all menus to find all relevant symbols */
716         menu = rootmenu.list;
717
718         while (menu != NULL)
719         {
720                 sym = menu->sym;
721                 if (sym == NULL) {
722                         if (!menu_is_visible(menu))
723                                 goto next_menu;
724                 } else if (!sym_is_choice(sym)) {
725                         sym_calc_value(sym);
726                         if (!(sym->flags & SYMBOL_WRITE))
727                                 goto next_menu;
728                         sym->flags &= ~SYMBOL_WRITE;
729                         /* If we cannot change the symbol - skip */
730                         if (!sym_is_changable(sym))
731                                 goto next_menu;
732                         /* If symbol equals to default value - skip */
733                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
734                                 goto next_menu;
735
736                         /*
737                          * If symbol is a choice value and equals to the
738                          * default for a choice - skip.
739                          * But only if value is bool and equal to "y" and
740                          * choice is not "optional".
741                          * (If choice is "optional" then all values can be "n")
742                          */
743                         if (sym_is_choice_value(sym)) {
744                                 struct symbol *cs;
745                                 struct symbol *ds;
746
747                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
748                                 ds = sym_choice_default(cs);
749                                 if (!sym_is_optional(cs) && sym == ds) {
750                                         if ((sym->type == S_BOOLEAN) &&
751                                             sym_get_tristate_value(sym) == yes)
752                                                 goto next_menu;
753                                 }
754                         }
755                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
756                 }
757 next_menu:
758                 if (menu->list != NULL) {
759                         menu = menu->list;
760                 }
761                 else if (menu->next != NULL) {
762                         menu = menu->next;
763                 } else {
764                         while ((menu = menu->parent)) {
765                                 if (menu->next != NULL) {
766                                         menu = menu->next;
767                                         break;
768                                 }
769                         }
770                 }
771         }
772         fclose(out);
773         return 0;
774 }
775
776 int conf_write(const char *name)
777 {
778         FILE *out;
779         struct symbol *sym;
780         struct menu *menu;
781         const char *basename;
782         const char *str;
783         char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
784         char *env;
785
786         dirname[0] = 0;
787         if (name && name[0]) {
788                 struct stat st;
789                 char *slash;
790
791                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
792                         strcpy(dirname, name);
793                         strcat(dirname, "/");
794                         basename = conf_get_configname();
795                 } else if ((slash = strrchr(name, '/'))) {
796                         int size = slash - name + 1;
797                         memcpy(dirname, name, size);
798                         dirname[size] = 0;
799                         if (slash[1])
800                                 basename = slash + 1;
801                         else
802                                 basename = conf_get_configname();
803                 } else
804                         basename = name;
805         } else
806                 basename = conf_get_configname();
807
808         sprintf(newname, "%s%s", dirname, basename);
809         env = getenv("KCONFIG_OVERWRITECONFIG");
810         if (!env || !*env) {
811                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
812                 out = fopen(tmpname, "w");
813         } else {
814                 *tmpname = 0;
815                 out = fopen(newname, "w");
816         }
817         if (!out)
818                 return 1;
819
820         conf_write_heading(out, &kconfig_printer_cb, NULL);
821
822         if (!conf_get_changed())
823                 sym_clear_all_valid();
824
825         menu = rootmenu.list;
826         while (menu) {
827                 sym = menu->sym;
828                 if (!sym) {
829                         if (!menu_is_visible(menu))
830                                 goto next;
831                         str = menu_get_prompt(menu);
832                         fprintf(out, "\n"
833                                      "#\n"
834                                      "# %s\n"
835                                      "#\n", str);
836                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
837                         sym_calc_value(sym);
838                         if (!(sym->flags & SYMBOL_WRITE))
839                                 goto next;
840                         sym->flags &= ~SYMBOL_WRITE;
841
842                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
843                 }
844
845 next:
846                 if (menu->list) {
847                         menu = menu->list;
848                         continue;
849                 }
850                 if (menu->next)
851                         menu = menu->next;
852                 else while ((menu = menu->parent)) {
853                         if (menu->next) {
854                                 menu = menu->next;
855                                 break;
856                         }
857                 }
858         }
859         fclose(out);
860
861         if (*tmpname) {
862                 strcat(dirname, basename);
863                 strcat(dirname, ".old");
864                 rename(newname, dirname);
865                 if (rename(tmpname, newname))
866                         return 1;
867         }
868
869         conf_message(_("configuration written to %s"), newname);
870
871         sym_set_change_count(0);
872
873         return 0;
874 }
875
876 static int conf_split_config(void)
877 {
878         const char *name;
879         char path[PATH_MAX+1];
880         char *s, *d, c;
881         struct symbol *sym;
882         struct stat sb;
883         int res, i, fd;
884
885         name = conf_get_autoconfig_name();
886         conf_read_simple(name, S_DEF_AUTO);
887
888         if (chdir("include/generated"))
889                 return 1;
890
891         res = 0;
892         for_all_symbols(i, sym) {
893                 sym_calc_value(sym);
894                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
895                         continue;
896                 if (sym->flags & SYMBOL_WRITE) {
897                         if (sym->flags & SYMBOL_DEF_AUTO) {
898                                 /*
899                                  * symbol has old and new value,
900                                  * so compare them...
901                                  */
902                                 switch (sym->type) {
903                                 case S_BOOLEAN:
904                                 case S_TRISTATE:
905                                         if (sym_get_tristate_value(sym) ==
906                                             sym->def[S_DEF_AUTO].tri)
907                                                 continue;
908                                         break;
909                                 case S_STRING:
910                                 case S_HEX:
911                                 case S_INT:
912                                         if (!strcmp(sym_get_string_value(sym),
913                                                     sym->def[S_DEF_AUTO].val))
914                                                 continue;
915                                         break;
916                                 default:
917                                         break;
918                                 }
919                         } else {
920                                 /*
921                                  * If there is no old value, only 'no' (unset)
922                                  * is allowed as new value.
923                                  */
924                                 switch (sym->type) {
925                                 case S_BOOLEAN:
926                                 case S_TRISTATE:
927                                         if (sym_get_tristate_value(sym) == no)
928                                                 continue;
929                                         break;
930                                 default:
931                                         break;
932                                 }
933                         }
934                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
935                         /* There is neither an old nor a new value. */
936                         continue;
937                 /* else
938                  *      There is an old value, but no new value ('no' (unset)
939                  *      isn't saved in auto.conf, so the old value is always
940                  *      different from 'no').
941                  */
942
943                 /* Replace all '_' and append ".h" */
944                 s = sym->name;
945                 d = path;
946                 while ((c = *s++)) {
947                         c = tolower(c);
948                         *d++ = (c == '_') ? '/' : c;
949                 }
950                 strcpy(d, ".h");
951
952                 /* Assume directory path already exists. */
953                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
954                 if (fd == -1) {
955                         if (errno != ENOENT) {
956                                 res = 1;
957                                 break;
958                         }
959                         /*
960                          * Create directory components,
961                          * unless they exist already.
962                          */
963                         d = path;
964                         while ((d = strchr(d, '/'))) {
965                                 *d = 0;
966                                 if (stat(path, &sb) && mkdir(path, 0755)) {
967                                         res = 1;
968                                         goto out;
969                                 }
970                                 *d++ = '/';
971                         }
972                         /* Try it again. */
973                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
974                         if (fd == -1) {
975                                 res = 1;
976                                 break;
977                         }
978                 }
979                 close(fd);
980         }
981 out:
982         if (chdir("../.."))
983                 return 1;
984
985         return res;
986 }
987
988 int conf_write_autoconf(void)
989 {
990         struct symbol *sym;
991         const char *name;
992         FILE *out, *tristate, *out_h, *out_c;
993         int i;
994
995         sym_clear_all_valid();
996
997         file_write_dep("include/generated/auto.conf.cmd");
998
999         if (conf_split_config())
1000                 return 1;
1001
1002         out = fopen(".tmpconfig", "w");
1003         if (!out)
1004                 return 1;
1005
1006         tristate = fopen(".tmpconfig_tristate", "w");
1007         if (!tristate) {
1008                 fclose(out);
1009                 return 1;
1010         }
1011
1012         out_h = fopen(".tmpconfig.h", "w");
1013         if (!out_h) {
1014                 fclose(out);
1015                 fclose(tristate);
1016                 return 1;
1017         }
1018
1019         out_c = fopen(".tmpconfig.cmake", "w");
1020         if (!out_c) {
1021                 fclose(out);
1022                 fclose(tristate);
1023                 fclose(out_h);
1024         }
1025
1026         conf_write_heading(out, &kconfig_printer_cb, NULL);
1027
1028         conf_write_heading(tristate, &tristate_printer_cb, NULL);
1029
1030         conf_write_heading(out_h, &header_printer_cb, NULL);
1031
1032         conf_write_heading(out_c, &kconfig_printer_cmake_cb, NULL);
1033
1034         for_all_symbols(i, sym) {
1035                 sym_calc_value(sym);
1036                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1037                         continue;
1038
1039                 /* write symbol to auto.conf, tristate and header files */
1040                 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1041
1042                 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1043
1044                 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1045
1046                 conf_write_symbol(out_c, sym, &kconfig_printer_cmake_cb, NULL);
1047         }
1048         fclose(out);
1049         fclose(tristate);
1050         fclose(out_h);
1051         fclose(out_c);
1052
1053         name = getenv("KCONFIG_AUTOHEADER");
1054         if (!name)
1055                 name = "include/generated/autoconf.h";
1056         if (rename(".tmpconfig.h", name))
1057                 return 1;
1058         name = getenv("KCONFIG_TRISTATE");
1059         if (!name)
1060                 name = "include/generated/tristate.conf";
1061         if (rename(".tmpconfig_tristate", name))
1062                 return 1;
1063         name = getenv("KCONFIG_CMAKE");
1064         if (!name)
1065                 name = "config.cmake";
1066         if (rename(".tmpconfig.cmake", name))
1067                 return 1;
1068         name = conf_get_autoconfig_name();
1069         /*
1070          * This must be the last step, kbuild has a dependency on auto.conf
1071          * and this marks the successful completion of the previous steps.
1072          */
1073         if (rename(".tmpconfig", name))
1074                 return 1;
1075
1076         return 0;
1077 }
1078
1079 static int sym_change_count;
1080 static void (*conf_changed_callback)(void);
1081
1082 void sym_set_change_count(int count)
1083 {
1084         int _sym_change_count = sym_change_count;
1085         sym_change_count = count;
1086         if (conf_changed_callback &&
1087             (bool)_sym_change_count != (bool)count)
1088                 conf_changed_callback();
1089 }
1090
1091 void sym_add_change_count(int count)
1092 {
1093         sym_set_change_count(count + sym_change_count);
1094 }
1095
1096 bool conf_get_changed(void)
1097 {
1098         return sym_change_count;
1099 }
1100
1101 void conf_set_changed_callback(void (*fn)(void))
1102 {
1103         conf_changed_callback = fn;
1104 }
1105
1106 static void randomize_choice_values(struct symbol *csym)
1107 {
1108         struct property *prop;
1109         struct symbol *sym;
1110         struct expr *e;
1111         int cnt, def;
1112
1113         /*
1114          * If choice is mod then we may have more items selected
1115          * and if no then no-one.
1116          * In both cases stop.
1117          */
1118         if (csym->curr.tri != yes)
1119                 return;
1120
1121         prop = sym_get_choice_prop(csym);
1122
1123         /* count entries in choice block */
1124         cnt = 0;
1125         expr_list_for_each_sym(prop->expr, e, sym)
1126                 cnt++;
1127
1128         /*
1129          * find a random value and set it to yes,
1130          * set the rest to no so we have only one set
1131          */
1132         def = (rand() % cnt);
1133
1134         cnt = 0;
1135         expr_list_for_each_sym(prop->expr, e, sym) {
1136                 if (def == cnt++) {
1137                         sym->def[S_DEF_USER].tri = yes;
1138                         csym->def[S_DEF_USER].val = sym;
1139                 }
1140                 else {
1141                         sym->def[S_DEF_USER].tri = no;
1142                 }
1143         }
1144         csym->flags |= SYMBOL_DEF_USER;
1145         /* clear VALID to get value calculated */
1146         csym->flags &= ~(SYMBOL_VALID);
1147 }
1148
1149 static void set_all_choice_values(struct symbol *csym)
1150 {
1151         struct property *prop;
1152         struct symbol *sym;
1153         struct expr *e;
1154
1155         prop = sym_get_choice_prop(csym);
1156
1157         /*
1158          * Set all non-assinged choice values to no
1159          */
1160         expr_list_for_each_sym(prop->expr, e, sym) {
1161                 if (!sym_has_value(sym))
1162                         sym->def[S_DEF_USER].tri = no;
1163         }
1164         csym->flags |= SYMBOL_DEF_USER;
1165         /* clear VALID to get value calculated */
1166         csym->flags &= ~(SYMBOL_VALID);
1167 }
1168
1169 void conf_set_all_new_symbols(enum conf_def_mode mode)
1170 {
1171         struct symbol *sym, *csym;
1172         int i, cnt;
1173
1174         for_all_symbols(i, sym) {
1175                 if (sym_has_value(sym))
1176                         continue;
1177                 switch (sym_get_type(sym)) {
1178                 case S_BOOLEAN:
1179                 case S_TRISTATE:
1180                         switch (mode) {
1181                         case def_yes:
1182                                 sym->def[S_DEF_USER].tri = yes;
1183                                 break;
1184                         case def_mod:
1185                                 sym->def[S_DEF_USER].tri = mod;
1186                                 break;
1187                         case def_no:
1188                                 sym->def[S_DEF_USER].tri = no;
1189                                 break;
1190                         case def_random:
1191                                 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1192                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1193                                 break;
1194                         default:
1195                                 continue;
1196                         }
1197                         if (!(sym_is_choice(sym) && mode == def_random))
1198                                 sym->flags |= SYMBOL_DEF_USER;
1199                         break;
1200                 default:
1201                         break;
1202                 }
1203
1204         }
1205
1206         sym_clear_all_valid();
1207
1208         /*
1209          * We have different type of choice blocks.
1210          * If curr.tri equals to mod then we can select several
1211          * choice symbols in one block.
1212          * In this case we do nothing.
1213          * If curr.tri equals yes then only one symbol can be
1214          * selected in a choice block and we set it to yes,
1215          * and the rest to no.
1216          */
1217         for_all_symbols(i, csym) {
1218                 if (sym_has_value(csym) || !sym_is_choice(csym))
1219                         continue;
1220
1221                 sym_calc_value(csym);
1222                 if (mode == def_random)
1223                         randomize_choice_values(csym);
1224                 else
1225                         set_all_choice_values(csym);
1226         }
1227 }