kconfig: use xfwrite wrapper function to silence warnings
[linux-3.10.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 <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[] = "arch/$ARCH/defconfig";
29
30 static void conf_warning(const char *fmt, ...)
31 {
32         va_list ap;
33         va_start(ap, fmt);
34         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
35         vfprintf(stderr, fmt, ap);
36         fprintf(stderr, "\n");
37         va_end(ap);
38         conf_warnings++;
39 }
40
41 static void conf_default_message_callback(const char *fmt, va_list ap)
42 {
43         printf("#\n# ");
44         vprintf(fmt, ap);
45         printf("\n#\n");
46 }
47
48 static void (*conf_message_callback) (const char *fmt, va_list ap) =
49         conf_default_message_callback;
50 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
51 {
52         conf_message_callback = fn;
53 }
54
55 static void conf_message(const char *fmt, ...)
56 {
57         va_list ap;
58
59         va_start(ap, fmt);
60         if (conf_message_callback)
61                 conf_message_callback(fmt, ap);
62 }
63
64 const char *conf_get_configname(void)
65 {
66         char *name = getenv("KCONFIG_CONFIG");
67
68         return name ? name : ".config";
69 }
70
71 const char *conf_get_autoconfig_name(void)
72 {
73         char *name = getenv("KCONFIG_AUTOCONFIG");
74
75         return name ? name : "include/config/auto.conf";
76 }
77
78 static char *conf_expand_value(const char *in)
79 {
80         struct symbol *sym;
81         const char *src;
82         static char res_value[SYMBOL_MAXLENGTH];
83         char *dst, name[SYMBOL_MAXLENGTH];
84
85         res_value[0] = 0;
86         dst = name;
87         while ((src = strchr(in, '$'))) {
88                 strncat(res_value, in, src - in);
89                 src++;
90                 dst = name;
91                 while (isalnum(*src) || *src == '_')
92                         *dst++ = *src++;
93                 *dst = 0;
94                 sym = sym_lookup(name, 0);
95                 sym_calc_value(sym);
96                 strcat(res_value, sym_get_string_value(sym));
97                 in = src;
98         }
99         strcat(res_value, in);
100
101         return res_value;
102 }
103
104 char *conf_get_default_confname(void)
105 {
106         struct stat buf;
107         static char fullname[PATH_MAX+1];
108         char *env, *name;
109
110         name = conf_expand_value(conf_defname);
111         env = getenv(SRCTREE);
112         if (env) {
113                 sprintf(fullname, "%s/%s", env, name);
114                 if (!stat(fullname, &buf))
115                         return fullname;
116         }
117         return name;
118 }
119
120 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
121 {
122         char *p2;
123
124         switch (sym->type) {
125         case S_TRISTATE:
126                 if (p[0] == 'm') {
127                         sym->def[def].tri = mod;
128                         sym->flags |= def_flags;
129                         break;
130                 }
131                 /* 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 int conf_read_simple(const char *name, int def)
186 {
187         FILE *in = NULL;
188         char line[1024];
189         char *p, *p2;
190         struct symbol *sym;
191         int i, def_flags;
192
193         if (name) {
194                 in = zconf_fopen(name);
195         } else {
196                 struct property *prop;
197
198                 name = conf_get_configname();
199                 in = zconf_fopen(name);
200                 if (in)
201                         goto load;
202                 sym_add_change_count(1);
203                 if (!sym_defconfig_list) {
204                         if (modules_sym)
205                                 sym_calc_value(modules_sym);
206                         return 1;
207                 }
208
209                 for_all_defaults(sym_defconfig_list, prop) {
210                         if (expr_calc_value(prop->visible.expr) == no ||
211                             prop->expr->type != E_SYMBOL)
212                                 continue;
213                         name = conf_expand_value(prop->expr->left.sym->name);
214                         in = zconf_fopen(name);
215                         if (in) {
216                                 conf_message(_("using defaults found in %s"),
217                                          name);
218                                 goto load;
219                         }
220                 }
221         }
222         if (!in)
223                 return 1;
224
225 load:
226         conf_filename = name;
227         conf_lineno = 0;
228         conf_warnings = 0;
229         conf_unsaved = 0;
230
231         def_flags = SYMBOL_DEF << def;
232         for_all_symbols(i, sym) {
233                 sym->flags |= SYMBOL_CHANGED;
234                 sym->flags &= ~(def_flags|SYMBOL_VALID);
235                 if (sym_is_choice(sym))
236                         sym->flags |= def_flags;
237                 switch (sym->type) {
238                 case S_INT:
239                 case S_HEX:
240                 case S_STRING:
241                         if (sym->def[def].val)
242                                 free(sym->def[def].val);
243                         /* fall through */
244                 default:
245                         sym->def[def].val = NULL;
246                         sym->def[def].tri = no;
247                 }
248         }
249
250         while (fgets(line, sizeof(line), in)) {
251                 conf_lineno++;
252                 sym = NULL;
253                 if (line[0] == '#') {
254                         if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
255                                 continue;
256                         p = strchr(line + 2 + strlen(CONFIG_), ' ');
257                         if (!p)
258                                 continue;
259                         *p++ = 0;
260                         if (strncmp(p, "is not set", 10))
261                                 continue;
262                         if (def == S_DEF_USER) {
263                                 sym = sym_find(line + 2 + strlen(CONFIG_));
264                                 if (!sym) {
265                                         sym_add_change_count(1);
266                                         goto setsym;
267                                 }
268                         } else {
269                                 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
270                                 if (sym->type == S_UNKNOWN)
271                                         sym->type = S_BOOLEAN;
272                         }
273                         if (sym->flags & def_flags) {
274                                 conf_warning("override: reassigning to symbol %s", sym->name);
275                         }
276                         switch (sym->type) {
277                         case S_BOOLEAN:
278                         case S_TRISTATE:
279                                 sym->def[def].tri = no;
280                                 sym->flags |= def_flags;
281                                 break;
282                         default:
283                                 ;
284                         }
285                 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
286                         p = strchr(line + strlen(CONFIG_), '=');
287                         if (!p)
288                                 continue;
289                         *p++ = 0;
290                         p2 = strchr(p, '\n');
291                         if (p2) {
292                                 *p2-- = 0;
293                                 if (*p2 == '\r')
294                                         *p2 = 0;
295                         }
296                         if (def == S_DEF_USER) {
297                                 sym = sym_find(line + strlen(CONFIG_));
298                                 if (!sym) {
299                                         sym_add_change_count(1);
300                                         goto setsym;
301                                 }
302                         } else {
303                                 sym = sym_lookup(line + strlen(CONFIG_), 0);
304                                 if (sym->type == S_UNKNOWN)
305                                         sym->type = S_OTHER;
306                         }
307                         if (sym->flags & def_flags) {
308                                 conf_warning("override: reassigning to symbol %s", sym->name);
309                         }
310                         if (conf_set_sym_val(sym, def, def_flags, p))
311                                 continue;
312                 } else {
313                         if (line[0] != '\r' && line[0] != '\n')
314                                 conf_warning("unexpected data");
315                         continue;
316                 }
317 setsym:
318                 if (sym && sym_is_choice_value(sym)) {
319                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
320                         switch (sym->def[def].tri) {
321                         case no:
322                                 break;
323                         case mod:
324                                 if (cs->def[def].tri == yes) {
325                                         conf_warning("%s creates inconsistent choice state", sym->name);
326                                         cs->flags &= ~def_flags;
327                                 }
328                                 break;
329                         case yes:
330                                 if (cs->def[def].tri != no)
331                                         conf_warning("override: %s changes choice state", sym->name);
332                                 cs->def[def].val = sym;
333                                 break;
334                         }
335                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
336                 }
337         }
338         fclose(in);
339
340         if (modules_sym)
341                 sym_calc_value(modules_sym);
342         return 0;
343 }
344
345 int conf_read(const char *name)
346 {
347         struct symbol *sym, *choice_sym;
348         struct property *prop;
349         struct expr *e;
350         int i, flags;
351
352         sym_set_change_count(0);
353
354         if (conf_read_simple(name, S_DEF_USER))
355                 return 1;
356
357         for_all_symbols(i, sym) {
358                 sym_calc_value(sym);
359                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
360                         goto sym_ok;
361                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
362                         /* check that calculated value agrees with saved value */
363                         switch (sym->type) {
364                         case S_BOOLEAN:
365                         case S_TRISTATE:
366                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
367                                         break;
368                                 if (!sym_is_choice(sym))
369                                         goto sym_ok;
370                                 /* fall through */
371                         default:
372                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
373                                         goto sym_ok;
374                                 break;
375                         }
376                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
377                         /* no previous value and not saved */
378                         goto sym_ok;
379                 conf_unsaved++;
380                 /* maybe print value in verbose mode... */
381         sym_ok:
382                 if (!sym_is_choice(sym))
383                         continue;
384                 /* The choice symbol only has a set value (and thus is not new)
385                  * if all its visible childs have values.
386                  */
387                 prop = sym_get_choice_prop(sym);
388                 flags = sym->flags;
389                 expr_list_for_each_sym(prop->expr, e, choice_sym)
390                         if (choice_sym->visible != no)
391                                 flags &= choice_sym->flags;
392                 sym->flags &= flags | ~SYMBOL_DEF_USER;
393         }
394
395         for_all_symbols(i, sym) {
396                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
397                         /* Reset values of generates values, so they'll appear
398                          * as new, if they should become visible, but that
399                          * doesn't quite work if the Kconfig and the saved
400                          * configuration disagree.
401                          */
402                         if (sym->visible == no && !conf_unsaved)
403                                 sym->flags &= ~SYMBOL_DEF_USER;
404                         switch (sym->type) {
405                         case S_STRING:
406                         case S_INT:
407                         case S_HEX:
408                                 /* Reset a string value if it's out of range */
409                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
410                                         break;
411                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
412                                 conf_unsaved++;
413                                 break;
414                         default:
415                                 break;
416                         }
417                 }
418         }
419
420         sym_add_change_count(conf_warnings || conf_unsaved);
421
422         return 0;
423 }
424
425 /*
426  * Kconfig configuration printer
427  *
428  * This printer is used when generating the resulting configuration after
429  * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
430  * passing a non-NULL argument to the printer.
431  *
432  */
433 static void
434 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
435 {
436
437         switch (sym->type) {
438         case S_BOOLEAN:
439         case S_TRISTATE:
440                 if (*value == 'n') {
441                         bool skip_unset = (arg != NULL);
442
443                         if (!skip_unset)
444                                 fprintf(fp, "# %s%s is not set\n",
445                                     CONFIG_, sym->name);
446                         return;
447                 }
448                 break;
449         default:
450                 break;
451         }
452
453         fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
454 }
455
456 static void
457 kconfig_print_comment(FILE *fp, const char *value, void *arg)
458 {
459         const char *p = value;
460         size_t l;
461
462         for (;;) {
463                 l = strcspn(p, "\n");
464                 fprintf(fp, "#");
465                 if (l) {
466                         fprintf(fp, " ");
467                         xfwrite(p, l, 1, fp);
468                         p += l;
469                 }
470                 fprintf(fp, "\n");
471                 if (*p++ == '\0')
472                         break;
473         }
474 }
475
476 static struct conf_printer kconfig_printer_cb =
477 {
478         .print_symbol = kconfig_print_symbol,
479         .print_comment = kconfig_print_comment,
480 };
481
482 /*
483  * Header printer
484  *
485  * This printer is used when generating the `include/generated/autoconf.h' file.
486  */
487 static void
488 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
489 {
490
491         switch (sym->type) {
492         case S_BOOLEAN:
493         case S_TRISTATE: {
494                 const char *suffix = "";
495
496                 switch (*value) {
497                 case 'n':
498                         break;
499                 case 'm':
500                         suffix = "_MODULE";
501                         /* fall through */
502                 default:
503                         fprintf(fp, "#define %s%s%s 1\n",
504                             CONFIG_, sym->name, suffix);
505                 }
506                 break;
507         }
508         case S_HEX: {
509                 const char *prefix = "";
510
511                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
512                         prefix = "0x";
513                 fprintf(fp, "#define %s%s %s%s\n",
514                     CONFIG_, sym->name, prefix, value);
515                 break;
516         }
517         case S_STRING:
518         case S_INT:
519                 fprintf(fp, "#define %s%s %s\n",
520                     CONFIG_, sym->name, value);
521                 break;
522         default:
523                 break;
524         }
525
526 }
527
528 static void
529 header_print_comment(FILE *fp, const char *value, void *arg)
530 {
531         const char *p = value;
532         size_t l;
533
534         fprintf(fp, "/*\n");
535         for (;;) {
536                 l = strcspn(p, "\n");
537                 fprintf(fp, " *");
538                 if (l) {
539                         fprintf(fp, " ");
540                         xfwrite(p, l, 1, fp);
541                         p += l;
542                 }
543                 fprintf(fp, "\n");
544                 if (*p++ == '\0')
545                         break;
546         }
547         fprintf(fp, " */\n");
548 }
549
550 static struct conf_printer header_printer_cb =
551 {
552         .print_symbol = header_print_symbol,
553         .print_comment = header_print_comment,
554 };
555
556 /*
557  * Generate the __enabled_CONFIG_* and __enabled_CONFIG_*_MODULE macros for
558  * use by the IS_{ENABLED,BUILTIN,MODULE} macros. The _MODULE variant is
559  * generated even for booleans so that the IS_ENABLED() macro works.
560  */
561 static void
562 header_print__enabled_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
563 {
564
565         switch (sym->type) {
566         case S_BOOLEAN:
567         case S_TRISTATE: {
568                 fprintf(fp, "#define __enabled_" CONFIG_ "%s %d\n",
569                     sym->name, (*value == 'y'));
570                 fprintf(fp, "#define __enabled_" CONFIG_ "%s_MODULE %d\n",
571                     sym->name, (*value == 'm'));
572                 break;
573         }
574         default:
575                 break;
576         }
577 }
578
579 static struct conf_printer header__enabled_printer_cb =
580 {
581         .print_symbol = header_print__enabled_symbol,
582         .print_comment = header_print_comment,
583 };
584
585 /*
586  * Tristate printer
587  *
588  * This printer is used when generating the `include/config/tristate.conf' file.
589  */
590 static void
591 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
592 {
593
594         if (sym->type == S_TRISTATE && *value != 'n')
595                 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
596 }
597
598 static struct conf_printer tristate_printer_cb =
599 {
600         .print_symbol = tristate_print_symbol,
601         .print_comment = kconfig_print_comment,
602 };
603
604 static void conf_write_symbol(FILE *fp, struct symbol *sym,
605                               struct conf_printer *printer, void *printer_arg)
606 {
607         const char *str;
608
609         switch (sym->type) {
610         case S_OTHER:
611         case S_UNKNOWN:
612                 break;
613         case S_STRING:
614                 str = sym_get_string_value(sym);
615                 str = sym_escape_string_value(str);
616                 printer->print_symbol(fp, sym, str, printer_arg);
617                 free((void *)str);
618                 break;
619         default:
620                 str = sym_get_string_value(sym);
621                 printer->print_symbol(fp, sym, str, printer_arg);
622         }
623 }
624
625 static void
626 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
627 {
628         char buf[256];
629
630         snprintf(buf, sizeof(buf),
631             "\n"
632             "Automatically generated file; DO NOT EDIT.\n"
633             "%s\n",
634             rootmenu.prompt->text);
635
636         printer->print_comment(fp, buf, printer_arg);
637 }
638
639 /*
640  * Write out a minimal config.
641  * All values that has default values are skipped as this is redundant.
642  */
643 int conf_write_defconfig(const char *filename)
644 {
645         struct symbol *sym;
646         struct menu *menu;
647         FILE *out;
648
649         out = fopen(filename, "w");
650         if (!out)
651                 return 1;
652
653         sym_clear_all_valid();
654
655         /* Traverse all menus to find all relevant symbols */
656         menu = rootmenu.list;
657
658         while (menu != NULL)
659         {
660                 sym = menu->sym;
661                 if (sym == NULL) {
662                         if (!menu_is_visible(menu))
663                                 goto next_menu;
664                 } else if (!sym_is_choice(sym)) {
665                         sym_calc_value(sym);
666                         if (!(sym->flags & SYMBOL_WRITE))
667                                 goto next_menu;
668                         sym->flags &= ~SYMBOL_WRITE;
669                         /* If we cannot change the symbol - skip */
670                         if (!sym_is_changable(sym))
671                                 goto next_menu;
672                         /* If symbol equals to default value - skip */
673                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
674                                 goto next_menu;
675
676                         /*
677                          * If symbol is a choice value and equals to the
678                          * default for a choice - skip.
679                          * But only if value is bool and equal to "y" and
680                          * choice is not "optional".
681                          * (If choice is "optional" then all values can be "n")
682                          */
683                         if (sym_is_choice_value(sym)) {
684                                 struct symbol *cs;
685                                 struct symbol *ds;
686
687                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
688                                 ds = sym_choice_default(cs);
689                                 if (!sym_is_optional(cs) && sym == ds) {
690                                         if ((sym->type == S_BOOLEAN) &&
691                                             sym_get_tristate_value(sym) == yes)
692                                                 goto next_menu;
693                                 }
694                         }
695                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
696                 }
697 next_menu:
698                 if (menu->list != NULL) {
699                         menu = menu->list;
700                 }
701                 else if (menu->next != NULL) {
702                         menu = menu->next;
703                 } else {
704                         while ((menu = menu->parent)) {
705                                 if (menu->next != NULL) {
706                                         menu = menu->next;
707                                         break;
708                                 }
709                         }
710                 }
711         }
712         fclose(out);
713         return 0;
714 }
715
716 int conf_write(const char *name)
717 {
718         FILE *out;
719         struct symbol *sym;
720         struct menu *menu;
721         const char *basename;
722         const char *str;
723         char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
724         char *env;
725
726         dirname[0] = 0;
727         if (name && name[0]) {
728                 struct stat st;
729                 char *slash;
730
731                 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
732                         strcpy(dirname, name);
733                         strcat(dirname, "/");
734                         basename = conf_get_configname();
735                 } else if ((slash = strrchr(name, '/'))) {
736                         int size = slash - name + 1;
737                         memcpy(dirname, name, size);
738                         dirname[size] = 0;
739                         if (slash[1])
740                                 basename = slash + 1;
741                         else
742                                 basename = conf_get_configname();
743                 } else
744                         basename = name;
745         } else
746                 basename = conf_get_configname();
747
748         sprintf(newname, "%s%s", dirname, basename);
749         env = getenv("KCONFIG_OVERWRITECONFIG");
750         if (!env || !*env) {
751                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
752                 out = fopen(tmpname, "w");
753         } else {
754                 *tmpname = 0;
755                 out = fopen(newname, "w");
756         }
757         if (!out)
758                 return 1;
759
760         conf_write_heading(out, &kconfig_printer_cb, NULL);
761
762         if (!conf_get_changed())
763                 sym_clear_all_valid();
764
765         menu = rootmenu.list;
766         while (menu) {
767                 sym = menu->sym;
768                 if (!sym) {
769                         if (!menu_is_visible(menu))
770                                 goto next;
771                         str = menu_get_prompt(menu);
772                         fprintf(out, "\n"
773                                      "#\n"
774                                      "# %s\n"
775                                      "#\n", str);
776                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
777                         sym_calc_value(sym);
778                         if (!(sym->flags & SYMBOL_WRITE))
779                                 goto next;
780                         sym->flags &= ~SYMBOL_WRITE;
781
782                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
783                 }
784
785 next:
786                 if (menu->list) {
787                         menu = menu->list;
788                         continue;
789                 }
790                 if (menu->next)
791                         menu = menu->next;
792                 else while ((menu = menu->parent)) {
793                         if (menu->next) {
794                                 menu = menu->next;
795                                 break;
796                         }
797                 }
798         }
799         fclose(out);
800
801         if (*tmpname) {
802                 strcat(dirname, basename);
803                 strcat(dirname, ".old");
804                 rename(newname, dirname);
805                 if (rename(tmpname, newname))
806                         return 1;
807         }
808
809         conf_message(_("configuration written to %s"), newname);
810
811         sym_set_change_count(0);
812
813         return 0;
814 }
815
816 static int conf_split_config(void)
817 {
818         const char *name;
819         char path[PATH_MAX+1];
820         char *s, *d, c;
821         struct symbol *sym;
822         struct stat sb;
823         int res, i, fd;
824
825         name = conf_get_autoconfig_name();
826         conf_read_simple(name, S_DEF_AUTO);
827
828         if (chdir("include/config"))
829                 return 1;
830
831         res = 0;
832         for_all_symbols(i, sym) {
833                 sym_calc_value(sym);
834                 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
835                         continue;
836                 if (sym->flags & SYMBOL_WRITE) {
837                         if (sym->flags & SYMBOL_DEF_AUTO) {
838                                 /*
839                                  * symbol has old and new value,
840                                  * so compare them...
841                                  */
842                                 switch (sym->type) {
843                                 case S_BOOLEAN:
844                                 case S_TRISTATE:
845                                         if (sym_get_tristate_value(sym) ==
846                                             sym->def[S_DEF_AUTO].tri)
847                                                 continue;
848                                         break;
849                                 case S_STRING:
850                                 case S_HEX:
851                                 case S_INT:
852                                         if (!strcmp(sym_get_string_value(sym),
853                                                     sym->def[S_DEF_AUTO].val))
854                                                 continue;
855                                         break;
856                                 default:
857                                         break;
858                                 }
859                         } else {
860                                 /*
861                                  * If there is no old value, only 'no' (unset)
862                                  * is allowed as new value.
863                                  */
864                                 switch (sym->type) {
865                                 case S_BOOLEAN:
866                                 case S_TRISTATE:
867                                         if (sym_get_tristate_value(sym) == no)
868                                                 continue;
869                                         break;
870                                 default:
871                                         break;
872                                 }
873                         }
874                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
875                         /* There is neither an old nor a new value. */
876                         continue;
877                 /* else
878                  *      There is an old value, but no new value ('no' (unset)
879                  *      isn't saved in auto.conf, so the old value is always
880                  *      different from 'no').
881                  */
882
883                 /* Replace all '_' and append ".h" */
884                 s = sym->name;
885                 d = path;
886                 while ((c = *s++)) {
887                         c = tolower(c);
888                         *d++ = (c == '_') ? '/' : c;
889                 }
890                 strcpy(d, ".h");
891
892                 /* Assume directory path already exists. */
893                 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
894                 if (fd == -1) {
895                         if (errno != ENOENT) {
896                                 res = 1;
897                                 break;
898                         }
899                         /*
900                          * Create directory components,
901                          * unless they exist already.
902                          */
903                         d = path;
904                         while ((d = strchr(d, '/'))) {
905                                 *d = 0;
906                                 if (stat(path, &sb) && mkdir(path, 0755)) {
907                                         res = 1;
908                                         goto out;
909                                 }
910                                 *d++ = '/';
911                         }
912                         /* Try it again. */
913                         fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
914                         if (fd == -1) {
915                                 res = 1;
916                                 break;
917                         }
918                 }
919                 close(fd);
920         }
921 out:
922         if (chdir("../.."))
923                 return 1;
924
925         return res;
926 }
927
928 int conf_write_autoconf(void)
929 {
930         struct symbol *sym;
931         const char *name;
932         FILE *out, *tristate, *out_h;
933         int i;
934
935         sym_clear_all_valid();
936
937         file_write_dep("include/config/auto.conf.cmd");
938
939         if (conf_split_config())
940                 return 1;
941
942         out = fopen(".tmpconfig", "w");
943         if (!out)
944                 return 1;
945
946         tristate = fopen(".tmpconfig_tristate", "w");
947         if (!tristate) {
948                 fclose(out);
949                 return 1;
950         }
951
952         out_h = fopen(".tmpconfig.h", "w");
953         if (!out_h) {
954                 fclose(out);
955                 fclose(tristate);
956                 return 1;
957         }
958
959         conf_write_heading(out, &kconfig_printer_cb, NULL);
960
961         conf_write_heading(tristate, &tristate_printer_cb, NULL);
962
963         conf_write_heading(out_h, &header_printer_cb, NULL);
964
965         for_all_symbols(i, sym) {
966                 if (!sym->name)
967                         continue;
968
969                 sym_calc_value(sym);
970
971                 conf_write_symbol(out_h, sym, &header__enabled_printer_cb, NULL);
972
973                 if (!(sym->flags & SYMBOL_WRITE))
974                         continue;
975
976                 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
977
978                 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
979
980                 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
981         }
982         fclose(out);
983         fclose(tristate);
984         fclose(out_h);
985
986         name = getenv("KCONFIG_AUTOHEADER");
987         if (!name)
988                 name = "include/generated/autoconf.h";
989         if (rename(".tmpconfig.h", name))
990                 return 1;
991         name = getenv("KCONFIG_TRISTATE");
992         if (!name)
993                 name = "include/config/tristate.conf";
994         if (rename(".tmpconfig_tristate", name))
995                 return 1;
996         name = conf_get_autoconfig_name();
997         /*
998          * This must be the last step, kbuild has a dependency on auto.conf
999          * and this marks the successful completion of the previous steps.
1000          */
1001         if (rename(".tmpconfig", name))
1002                 return 1;
1003
1004         return 0;
1005 }
1006
1007 static int sym_change_count;
1008 static void (*conf_changed_callback)(void);
1009
1010 void sym_set_change_count(int count)
1011 {
1012         int _sym_change_count = sym_change_count;
1013         sym_change_count = count;
1014         if (conf_changed_callback &&
1015             (bool)_sym_change_count != (bool)count)
1016                 conf_changed_callback();
1017 }
1018
1019 void sym_add_change_count(int count)
1020 {
1021         sym_set_change_count(count + sym_change_count);
1022 }
1023
1024 bool conf_get_changed(void)
1025 {
1026         return sym_change_count;
1027 }
1028
1029 void conf_set_changed_callback(void (*fn)(void))
1030 {
1031         conf_changed_callback = fn;
1032 }
1033
1034 static void randomize_choice_values(struct symbol *csym)
1035 {
1036         struct property *prop;
1037         struct symbol *sym;
1038         struct expr *e;
1039         int cnt, def;
1040
1041         /*
1042          * If choice is mod then we may have more items selected
1043          * and if no then no-one.
1044          * In both cases stop.
1045          */
1046         if (csym->curr.tri != yes)
1047                 return;
1048
1049         prop = sym_get_choice_prop(csym);
1050
1051         /* count entries in choice block */
1052         cnt = 0;
1053         expr_list_for_each_sym(prop->expr, e, sym)
1054                 cnt++;
1055
1056         /*
1057          * find a random value and set it to yes,
1058          * set the rest to no so we have only one set
1059          */
1060         def = (rand() % cnt);
1061
1062         cnt = 0;
1063         expr_list_for_each_sym(prop->expr, e, sym) {
1064                 if (def == cnt++) {
1065                         sym->def[S_DEF_USER].tri = yes;
1066                         csym->def[S_DEF_USER].val = sym;
1067                 }
1068                 else {
1069                         sym->def[S_DEF_USER].tri = no;
1070                 }
1071         }
1072         csym->flags |= SYMBOL_DEF_USER;
1073         /* clear VALID to get value calculated */
1074         csym->flags &= ~(SYMBOL_VALID);
1075 }
1076
1077 static void set_all_choice_values(struct symbol *csym)
1078 {
1079         struct property *prop;
1080         struct symbol *sym;
1081         struct expr *e;
1082
1083         prop = sym_get_choice_prop(csym);
1084
1085         /*
1086          * Set all non-assinged choice values to no
1087          */
1088         expr_list_for_each_sym(prop->expr, e, sym) {
1089                 if (!sym_has_value(sym))
1090                         sym->def[S_DEF_USER].tri = no;
1091         }
1092         csym->flags |= SYMBOL_DEF_USER;
1093         /* clear VALID to get value calculated */
1094         csym->flags &= ~(SYMBOL_VALID);
1095 }
1096
1097 void conf_set_all_new_symbols(enum conf_def_mode mode)
1098 {
1099         struct symbol *sym, *csym;
1100         int i, cnt;
1101
1102         for_all_symbols(i, sym) {
1103                 if (sym_has_value(sym))
1104                         continue;
1105                 switch (sym_get_type(sym)) {
1106                 case S_BOOLEAN:
1107                 case S_TRISTATE:
1108                         switch (mode) {
1109                         case def_yes:
1110                                 sym->def[S_DEF_USER].tri = yes;
1111                                 break;
1112                         case def_mod:
1113                                 sym->def[S_DEF_USER].tri = mod;
1114                                 break;
1115                         case def_no:
1116                                 sym->def[S_DEF_USER].tri = no;
1117                                 break;
1118                         case def_random:
1119                                 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1120                                 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1121                                 break;
1122                         default:
1123                                 continue;
1124                         }
1125                         if (!(sym_is_choice(sym) && mode == def_random))
1126                                 sym->flags |= SYMBOL_DEF_USER;
1127                         break;
1128                 default:
1129                         break;
1130                 }
1131
1132         }
1133
1134         sym_clear_all_valid();
1135
1136         /*
1137          * We have different type of choice blocks.
1138          * If curr.tri equals to mod then we can select several
1139          * choice symbols in one block.
1140          * In this case we do nothing.
1141          * If curr.tri equals yes then only one symbol can be
1142          * selected in a choice block and we set it to yes,
1143          * and the rest to no.
1144          */
1145         for_all_symbols(i, csym) {
1146                 if (sym_has_value(csym) || !sym_is_choice(csym))
1147                         continue;
1148
1149                 sym_calc_value(csym);
1150                 if (mode == def_random)
1151                         randomize_choice_values(csym);
1152                 else
1153                         set_all_choice_values(csym);
1154         }
1155 }