Makefile: Add atusb to 'all'
[linux-libre-firmware.git] / carl9170fw / config / confdata.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
4  */
5
6 #include <sys/stat.h>
7 #include <ctype.h>
8 #include <errno.h>
9 #include <fcntl.h>
10 #include <limits.h>
11 #include <stdarg.h>
12 #include <stdio.h>
13 #include <stdlib.h>
14 #include <string.h>
15 #include <time.h>
16 #include <unistd.h>
17
18 #include "lkc.h"
19
20 /* return true if 'path' exists, false otherwise */
21 static bool is_present(const char *path)
22 {
23         struct stat st;
24
25         return !stat(path, &st);
26 }
27
28 /* return true if 'path' exists and it is a directory, false otherwise */
29 static bool is_dir(const char *path)
30 {
31         struct stat st;
32
33         if (stat(path, &st))
34                 return 0;
35
36         return S_ISDIR(st.st_mode);
37 }
38
39 /*
40  * Create the parent directory of the given path.
41  *
42  * For example, if 'include/config/auto.conf' is given, create 'include/config'.
43  */
44 static int make_parent_dir(const char *path)
45 {
46         char tmp[PATH_MAX + 1];
47         char *p;
48
49         strncpy(tmp, path, sizeof(tmp));
50         tmp[sizeof(tmp) - 1] = 0;
51
52         /* Remove the base name. Just return if nothing is left */
53         p = strrchr(tmp, '/');
54         if (!p)
55                 return 0;
56         *(p + 1) = 0;
57
58         /* Just in case it is an absolute path */
59         p = tmp;
60         while (*p == '/')
61                 p++;
62
63         while ((p = strchr(p, '/'))) {
64                 *p = 0;
65
66                 /* skip if the directory exists */
67                 if (!is_dir(tmp) && mkdir(tmp, 0755))
68                         return -1;
69
70                 *p = '/';
71                 while (*p == '/')
72                         p++;
73         }
74
75         return 0;
76 }
77
78 static char depfile_path[PATH_MAX];
79 static size_t depfile_prefix_len;
80
81 /* touch depfile for symbol 'name' */
82 static int conf_touch_dep(const char *name)
83 {
84         int fd, ret;
85         const char *s;
86         char *d, c;
87
88         /* check overflow: prefix + name + ".h" + '\0' must fit in buffer. */
89         if (depfile_prefix_len + strlen(name) + 3 > sizeof(depfile_path))
90                 return -1;
91
92         d = depfile_path + depfile_prefix_len;
93         s = name;
94
95         while ((c = *s++))
96                 *d++ = (c == '_') ? '/' : tolower(c);
97         strcpy(d, ".h");
98
99         /* Assume directory path already exists. */
100         fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
101         if (fd == -1) {
102                 if (errno != ENOENT)
103                         return -1;
104
105                 ret = make_parent_dir(depfile_path);
106                 if (ret)
107                         return ret;
108
109                 /* Try it again. */
110                 fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
111                 if (fd == -1)
112                         return -1;
113         }
114         close(fd);
115
116         return 0;
117 }
118
119 struct conf_printer {
120         void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
121         void (*print_comment)(FILE *, const char *, void *);
122 };
123
124 static void conf_warning(const char *fmt, ...)
125         __attribute__ ((format (printf, 1, 2)));
126
127 static void conf_message(const char *fmt, ...)
128         __attribute__ ((format (printf, 1, 2)));
129
130 static const char *conf_filename;
131 static int conf_lineno, conf_warnings;
132
133 const char conf_defname[] = "include/generated/defconfig";
134
135 static void conf_warning(const char *fmt, ...)
136 {
137         va_list ap;
138         va_start(ap, fmt);
139         fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
140         vfprintf(stderr, fmt, ap);
141         fprintf(stderr, "\n");
142         va_end(ap);
143         conf_warnings++;
144 }
145
146 static void conf_default_message_callback(const char *s)
147 {
148         printf("#\n# ");
149         printf("%s", s);
150         printf("\n#\n");
151 }
152
153 static void (*conf_message_callback)(const char *s) =
154         conf_default_message_callback;
155 void conf_set_message_callback(void (*fn)(const char *s))
156 {
157         conf_message_callback = fn;
158 }
159
160 static void conf_message(const char *fmt, ...)
161 {
162         va_list ap;
163         char buf[4096];
164
165         if (!conf_message_callback)
166                 return;
167
168         va_start(ap, fmt);
169
170         vsnprintf(buf, sizeof(buf), fmt, ap);
171         conf_message_callback(buf);
172         va_end(ap);
173 }
174
175 const char *conf_get_configname(void)
176 {
177         char *name = getenv("KCONFIG_CONFIG");
178
179         return name ? name : ".config";
180 }
181
182 const char *conf_get_autoconfig_name(void)
183 {
184         char *name = getenv("KCONFIG_AUTOCONFIG");
185
186         return name ? name : "include/generated/auto.conf";
187 }
188
189 char *conf_get_default_confname(void)
190 {
191         static char fullname[PATH_MAX+1];
192         char *env, *name;
193
194         name = expand_string(conf_defname);
195         env = getenv(SRCTREE);
196         if (env) {
197                 sprintf(fullname, "%s/%s", env, name);
198                 if (is_present(fullname))
199                         return fullname;
200         }
201         return name;
202 }
203
204 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
205 {
206         char *p2;
207
208         switch (sym->type) {
209         case S_TRISTATE:
210                 if (p[0] == 'm') {
211                         sym->def[def].tri = mod;
212                         sym->flags |= def_flags;
213                         break;
214                 }
215                 /* fall through */
216         case S_BOOLEAN:
217                 if (p[0] == 'y') {
218                         sym->def[def].tri = yes;
219                         sym->flags |= def_flags;
220                         break;
221                 }
222                 if (p[0] == 'n') {
223                         sym->def[def].tri = no;
224                         sym->flags |= def_flags;
225                         break;
226                 }
227                 if (def != S_DEF_AUTO)
228                         conf_warning("symbol value '%s' invalid for %s",
229                                      p, sym->name);
230                 return 1;
231         case S_STRING:
232                 if (*p++ != '"')
233                         break;
234                 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
235                         if (*p2 == '"') {
236                                 *p2 = 0;
237                                 break;
238                         }
239                         memmove(p2, p2 + 1, strlen(p2));
240                 }
241                 if (!p2) {
242                         if (def != S_DEF_AUTO)
243                                 conf_warning("invalid string found");
244                         return 1;
245                 }
246                 /* fall through */
247         case S_INT:
248         case S_HEX:
249                 if (sym_string_valid(sym, p)) {
250                         sym->def[def].val = xstrdup(p);
251                         sym->flags |= def_flags;
252                 } else {
253                         if (def != S_DEF_AUTO)
254                                 conf_warning("symbol value '%s' invalid for %s",
255                                              p, sym->name);
256                         return 1;
257                 }
258                 break;
259         default:
260                 ;
261         }
262         return 0;
263 }
264
265 #define LINE_GROWTH 16
266 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
267 {
268         char *nline;
269         size_t new_size = slen + 1;
270         if (new_size > *n) {
271                 new_size += LINE_GROWTH - 1;
272                 new_size *= 2;
273                 nline = xrealloc(*lineptr, new_size);
274                 if (!nline)
275                         return -1;
276
277                 *lineptr = nline;
278                 *n = new_size;
279         }
280
281         (*lineptr)[slen] = c;
282
283         return 0;
284 }
285
286 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
287 {
288         char *line = *lineptr;
289         size_t slen = 0;
290
291         for (;;) {
292                 int c = getc(stream);
293
294                 switch (c) {
295                 case '\n':
296                         if (add_byte(c, &line, slen, n) < 0)
297                                 goto e_out;
298                         slen++;
299                         /* fall through */
300                 case EOF:
301                         if (add_byte('\0', &line, slen, n) < 0)
302                                 goto e_out;
303                         *lineptr = line;
304                         if (slen == 0)
305                                 return -1;
306                         return slen;
307                 default:
308                         if (add_byte(c, &line, slen, n) < 0)
309                                 goto e_out;
310                         slen++;
311                 }
312         }
313
314 e_out:
315         line[slen-1] = '\0';
316         *lineptr = line;
317         return -1;
318 }
319
320 int conf_read_simple(const char *name, int def)
321 {
322         FILE *in = NULL;
323         char   *line = NULL;
324         size_t  line_asize = 0;
325         char *p, *p2;
326         struct symbol *sym;
327         int i, def_flags;
328
329         if (name) {
330                 in = zconf_fopen(name);
331         } else {
332                 struct property *prop;
333
334                 name = conf_get_configname();
335                 in = zconf_fopen(name);
336                 if (in)
337                         goto load;
338                 sym_add_change_count(1);
339                 if (!sym_defconfig_list)
340                         return 1;
341
342                 for_all_defaults(sym_defconfig_list, prop) {
343                         if (expr_calc_value(prop->visible.expr) == no ||
344                             prop->expr->type != E_SYMBOL)
345                                 continue;
346                         sym_calc_value(prop->expr->left.sym);
347                         name = sym_get_string_value(prop->expr->left.sym);
348                         in = zconf_fopen(name);
349                         if (in) {
350                                 conf_message("using defaults found in %s",
351                                          name);
352                                 goto load;
353                         }
354                 }
355         }
356         if (!in)
357                 return 1;
358
359 load:
360         conf_filename = name;
361         conf_lineno = 0;
362         conf_warnings = 0;
363
364         def_flags = SYMBOL_DEF << def;
365         for_all_symbols(i, sym) {
366                 sym->flags |= SYMBOL_CHANGED;
367                 sym->flags &= ~(def_flags|SYMBOL_VALID);
368                 if (sym_is_choice(sym))
369                         sym->flags |= def_flags;
370                 switch (sym->type) {
371                 case S_INT:
372                 case S_HEX:
373                 case S_STRING:
374                         if (sym->def[def].val)
375                                 free(sym->def[def].val);
376                         /* fall through */
377                 default:
378                         sym->def[def].val = NULL;
379                         sym->def[def].tri = no;
380                 }
381         }
382
383         while (compat_getline(&line, &line_asize, in) != -1) {
384                 conf_lineno++;
385                 sym = NULL;
386                 if (line[0] == '#') {
387                         if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
388                                 continue;
389                         p = strchr(line + 2 + strlen(CONFIG_), ' ');
390                         if (!p)
391                                 continue;
392                         *p++ = 0;
393                         if (strncmp(p, "is not set", 10))
394                                 continue;
395                         if (def == S_DEF_USER) {
396                                 sym = sym_find(line + 2 + strlen(CONFIG_));
397                                 if (!sym) {
398                                         sym_add_change_count(1);
399                                         continue;
400                                 }
401                         } else {
402                                 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
403                                 if (sym->type == S_UNKNOWN)
404                                         sym->type = S_BOOLEAN;
405                         }
406                         if (sym->flags & def_flags) {
407                                 conf_warning("override: reassigning to symbol %s", sym->name);
408                         }
409                         switch (sym->type) {
410                         case S_BOOLEAN:
411                         case S_TRISTATE:
412                                 sym->def[def].tri = no;
413                                 sym->flags |= def_flags;
414                                 break;
415                         default:
416                                 ;
417                         }
418                 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
419                         p = strchr(line + strlen(CONFIG_), '=');
420                         if (!p)
421                                 continue;
422                         *p++ = 0;
423                         p2 = strchr(p, '\n');
424                         if (p2) {
425                                 *p2-- = 0;
426                                 if (*p2 == '\r')
427                                         *p2 = 0;
428                         }
429
430                         sym = sym_find(line + strlen(CONFIG_));
431                         if (!sym) {
432                                 if (def == S_DEF_AUTO)
433                                         /*
434                                          * Reading from include/config/auto.conf
435                                          * If CONFIG_FOO previously existed in
436                                          * auto.conf but it is missing now,
437                                          * include/config/foo.h must be touched.
438                                          */
439                                         conf_touch_dep(line + strlen(CONFIG_));
440                                 else
441                                         sym_add_change_count(1);
442                                 continue;
443                         }
444
445                         if (sym->flags & def_flags) {
446                                 conf_warning("override: reassigning to symbol %s", sym->name);
447                         }
448                         if (conf_set_sym_val(sym, def, def_flags, p))
449                                 continue;
450                 } else {
451                         if (line[0] != '\r' && line[0] != '\n')
452                                 conf_warning("unexpected data: %.*s",
453                                              (int)strcspn(line, "\r\n"), line);
454
455                         continue;
456                 }
457
458                 if (sym && sym_is_choice_value(sym)) {
459                         struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
460                         switch (sym->def[def].tri) {
461                         case no:
462                                 break;
463                         case mod:
464                                 if (cs->def[def].tri == yes) {
465                                         conf_warning("%s creates inconsistent choice state", sym->name);
466                                         cs->flags &= ~def_flags;
467                                 }
468                                 break;
469                         case yes:
470                                 if (cs->def[def].tri != no)
471                                         conf_warning("override: %s changes choice state", sym->name);
472                                 cs->def[def].val = sym;
473                                 break;
474                         }
475                         cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
476                 }
477         }
478         free(line);
479         fclose(in);
480         return 0;
481 }
482
483 int conf_read(const char *name)
484 {
485         struct symbol *sym;
486         int conf_unsaved = 0;
487         int i;
488
489         sym_set_change_count(0);
490
491         if (conf_read_simple(name, S_DEF_USER)) {
492                 sym_calc_value(modules_sym);
493                 return 1;
494         }
495
496         sym_calc_value(modules_sym);
497
498         for_all_symbols(i, sym) {
499                 sym_calc_value(sym);
500                 if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
501                         continue;
502                 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
503                         /* check that calculated value agrees with saved value */
504                         switch (sym->type) {
505                         case S_BOOLEAN:
506                         case S_TRISTATE:
507                                 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
508                                         break;
509                                 if (!sym_is_choice(sym))
510                                         continue;
511                                 /* fall through */
512                         default:
513                                 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
514                                         continue;
515                                 break;
516                         }
517                 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
518                         /* no previous value and not saved */
519                         continue;
520                 conf_unsaved++;
521                 /* maybe print value in verbose mode... */
522         }
523
524         for_all_symbols(i, sym) {
525                 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
526                         /* Reset values of generates values, so they'll appear
527                          * as new, if they should become visible, but that
528                          * doesn't quite work if the Kconfig and the saved
529                          * configuration disagree.
530                          */
531                         if (sym->visible == no && !conf_unsaved)
532                                 sym->flags &= ~SYMBOL_DEF_USER;
533                         switch (sym->type) {
534                         case S_STRING:
535                         case S_INT:
536                         case S_HEX:
537                                 /* Reset a string value if it's out of range */
538                                 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
539                                         break;
540                                 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
541                                 conf_unsaved++;
542                                 break;
543                         default:
544                                 break;
545                         }
546                 }
547         }
548
549         sym_add_change_count(conf_warnings || conf_unsaved);
550
551         return 0;
552 }
553
554 /*
555  * Kconfig configuration printer
556  *
557  * This printer is used when generating the resulting configuration after
558  * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
559  * passing a non-NULL argument to the printer.
560  *
561  */
562 static void
563 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
564 {
565
566         switch (sym->type) {
567         case S_BOOLEAN:
568         case S_TRISTATE:
569                 if (*value == 'n') {
570                         bool skip_unset = (arg != NULL);
571
572                         if (!skip_unset)
573                                 fprintf(fp, "# %s%s is not set\n",
574                                     CONFIG_, sym->name);
575                         return;
576                 }
577                 break;
578         default:
579                 break;
580         }
581
582         fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
583 }
584
585 static void
586 kconfig_print_cmake_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
587 {
588
589         switch (sym->type) {
590         case S_BOOLEAN:
591         case S_TRISTATE:
592                 if (*value == 'n') {
593                         bool skip_unset = (arg != NULL);
594
595                         if (!skip_unset)
596                                 fprintf(fp, "set(%s%s false)\n",
597                                         CONFIG_, sym->name, value);
598                         return;
599                 } else if (*value == 'm') {
600                         abort();
601                 } else {
602                         fprintf(fp, "set(%s%s true)\n", CONFIG_, sym->name, value);
603                 }
604                 break;
605         case S_HEX: {
606                 const char *prefix = "";
607
608                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
609                         prefix = "0x";
610                 fprintf(fp, "set(%s%s %s%s)\n",
611                     CONFIG_, sym->name, prefix, value);
612                 break;
613         }
614         case S_STRING:
615         case S_INT:
616                 fprintf(fp, "set(%s%s %s)\n",
617                     CONFIG_, sym->name, value);
618                 break;
619         default:
620                 break;
621         }
622
623 }
624
625 static void
626 kconfig_print_comment(FILE *fp, const char *value, void *arg)
627 {
628         const char *p = value;
629         size_t l;
630
631         for (;;) {
632                 l = strcspn(p, "\n");
633                 fprintf(fp, "#");
634                 if (l) {
635                         fprintf(fp, " ");
636                         xfwrite(p, l, 1, fp);
637                         p += l;
638                 }
639                 fprintf(fp, "\n");
640                 if (*p++ == '\0')
641                         break;
642         }
643 }
644
645 static struct conf_printer kconfig_printer_cb =
646 {
647         .print_symbol = kconfig_print_symbol,
648         .print_comment = kconfig_print_comment,
649 };
650
651 static struct conf_printer kconfig_printer_cmake_cb =
652 {
653         .print_symbol = kconfig_print_cmake_symbol,
654         .print_comment = kconfig_print_comment,
655 };
656
657 /*
658  * Header printer
659  *
660  * This printer is used when generating the `include/generated/autoconf.h' file.
661  */
662 static void
663 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
664 {
665
666         switch (sym->type) {
667         case S_BOOLEAN:
668         case S_TRISTATE: {
669                 const char *suffix = "";
670
671                 switch (*value) {
672                 case 'n':
673                         break;
674                 case 'm':
675                         suffix = "_MODULE";
676                         /* fall through */
677                 default:
678                         fprintf(fp, "#define %s%s%s 1\n",
679                             CONFIG_, sym->name, suffix);
680                 }
681                 break;
682         }
683         case S_HEX: {
684                 const char *prefix = "";
685
686                 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
687                         prefix = "0x";
688                 fprintf(fp, "#define %s%s %s%s\n",
689                     CONFIG_, sym->name, prefix, value);
690                 break;
691         }
692         case S_STRING:
693         case S_INT:
694                 fprintf(fp, "#define %s%s %s\n",
695                     CONFIG_, sym->name, value);
696                 break;
697         default:
698                 break;
699         }
700
701 }
702
703 static void
704 header_print_comment(FILE *fp, const char *value, void *arg)
705 {
706         const char *p = value;
707         size_t l;
708
709         fprintf(fp, "/*\n");
710         for (;;) {
711                 l = strcspn(p, "\n");
712                 fprintf(fp, " *");
713                 if (l) {
714                         fprintf(fp, " ");
715                         xfwrite(p, l, 1, fp);
716                         p += l;
717                 }
718                 fprintf(fp, "\n");
719                 if (*p++ == '\0')
720                         break;
721         }
722         fprintf(fp, " */\n");
723 }
724
725 static struct conf_printer header_printer_cb =
726 {
727         .print_symbol = header_print_symbol,
728         .print_comment = header_print_comment,
729 };
730
731 /*
732  * Tristate printer
733  *
734  * This printer is used when generating the `include/generated/tristate.conf' file.
735  */
736 static void
737 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
738 {
739
740         if (sym->type == S_TRISTATE && *value != 'n')
741                 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
742 }
743
744 static struct conf_printer tristate_printer_cb =
745 {
746         .print_symbol = tristate_print_symbol,
747         .print_comment = kconfig_print_comment,
748 };
749
750 static void conf_write_symbol(FILE *fp, struct symbol *sym,
751                               struct conf_printer *printer, void *printer_arg)
752 {
753         const char *str;
754
755         switch (sym->type) {
756         case S_UNKNOWN:
757                 break;
758         case S_STRING:
759                 str = sym_get_string_value(sym);
760                 str = sym_escape_string_value(str);
761                 printer->print_symbol(fp, sym, str, printer_arg);
762                 free((void *)str);
763                 break;
764         default:
765                 str = sym_get_string_value(sym);
766                 printer->print_symbol(fp, sym, str, printer_arg);
767         }
768 }
769
770 static void
771 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
772 {
773         char buf[256];
774
775         snprintf(buf, sizeof(buf),
776             "\n"
777             "Automatically generated file; DO NOT EDIT.\n"
778             "%s\n",
779             rootmenu.prompt->text);
780
781         printer->print_comment(fp, buf, printer_arg);
782 }
783
784 /*
785  * Write out a minimal config.
786  * All values that has default values are skipped as this is redundant.
787  */
788 int conf_write_defconfig(const char *filename)
789 {
790         struct symbol *sym;
791         struct menu *menu;
792         FILE *out;
793
794         out = fopen(filename, "w");
795         if (!out)
796                 return 1;
797
798         sym_clear_all_valid();
799
800         /* Traverse all menus to find all relevant symbols */
801         menu = rootmenu.list;
802
803         while (menu != NULL)
804         {
805                 sym = menu->sym;
806                 if (sym == NULL) {
807                         if (!menu_is_visible(menu))
808                                 goto next_menu;
809                 } else if (!sym_is_choice(sym)) {
810                         sym_calc_value(sym);
811                         if (!(sym->flags & SYMBOL_WRITE))
812                                 goto next_menu;
813                         sym->flags &= ~SYMBOL_WRITE;
814                         /* If we cannot change the symbol - skip */
815                         if (!sym_is_changable(sym))
816                                 goto next_menu;
817                         /* If symbol equals to default value - skip */
818                         if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
819                                 goto next_menu;
820
821                         /*
822                          * If symbol is a choice value and equals to the
823                          * default for a choice - skip.
824                          * But only if value is bool and equal to "y" and
825                          * choice is not "optional".
826                          * (If choice is "optional" then all values can be "n")
827                          */
828                         if (sym_is_choice_value(sym)) {
829                                 struct symbol *cs;
830                                 struct symbol *ds;
831
832                                 cs = prop_get_symbol(sym_get_choice_prop(sym));
833                                 ds = sym_choice_default(cs);
834                                 if (!sym_is_optional(cs) && sym == ds) {
835                                         if ((sym->type == S_BOOLEAN) &&
836                                             sym_get_tristate_value(sym) == yes)
837                                                 goto next_menu;
838                                 }
839                         }
840                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
841                 }
842 next_menu:
843                 if (menu->list != NULL) {
844                         menu = menu->list;
845                 }
846                 else if (menu->next != NULL) {
847                         menu = menu->next;
848                 } else {
849                         while ((menu = menu->parent)) {
850                                 if (menu->next != NULL) {
851                                         menu = menu->next;
852                                         break;
853                                 }
854                         }
855                 }
856         }
857         fclose(out);
858         return 0;
859 }
860
861 int conf_write(const char *name)
862 {
863         FILE *out;
864         struct symbol *sym;
865         struct menu *menu;
866         const char *basename;
867         const char *str;
868         char dirname[PATH_MAX+1], tmpname[PATH_MAX+22], newname[PATH_MAX+8];
869         char *env;
870
871         dirname[0] = 0;
872         if (name && name[0]) {
873                 char *slash;
874
875                 if (is_dir(name)) {
876                         strcpy(dirname, name);
877                         strcat(dirname, "/");
878                         basename = conf_get_configname();
879                 } else if ((slash = strrchr(name, '/'))) {
880                         int size = slash - name + 1;
881                         memcpy(dirname, name, size);
882                         dirname[size] = 0;
883                         if (slash[1])
884                                 basename = slash + 1;
885                         else
886                                 basename = conf_get_configname();
887                 } else
888                         basename = name;
889         } else
890                 basename = conf_get_configname();
891
892         sprintf(newname, "%s%s", dirname, basename);
893         env = getenv("KCONFIG_OVERWRITECONFIG");
894         if (!env || !*env) {
895                 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
896                 out = fopen(tmpname, "w");
897         } else {
898                 *tmpname = 0;
899                 out = fopen(newname, "w");
900         }
901         if (!out)
902                 return 1;
903
904         conf_write_heading(out, &kconfig_printer_cb, NULL);
905
906         if (!conf_get_changed())
907                 sym_clear_all_valid();
908
909         menu = rootmenu.list;
910         while (menu) {
911                 sym = menu->sym;
912                 if (!sym) {
913                         if (!menu_is_visible(menu))
914                                 goto next;
915                         str = menu_get_prompt(menu);
916                         fprintf(out, "\n"
917                                      "#\n"
918                                      "# %s\n"
919                                      "#\n", str);
920                 } else if (!(sym->flags & SYMBOL_CHOICE)) {
921                         sym_calc_value(sym);
922                         if (!(sym->flags & SYMBOL_WRITE))
923                                 goto next;
924                         sym->flags &= ~SYMBOL_WRITE;
925
926                         conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
927                 }
928
929 next:
930                 if (menu->list) {
931                         menu = menu->list;
932                         continue;
933                 }
934                 if (menu->next)
935                         menu = menu->next;
936                 else while ((menu = menu->parent)) {
937                         if (menu->next) {
938                                 menu = menu->next;
939                                 break;
940                         }
941                 }
942         }
943         fclose(out);
944
945         if (*tmpname) {
946                 strcat(dirname, basename);
947                 strcat(dirname, ".old");
948                 rename(newname, dirname);
949                 if (rename(tmpname, newname))
950                         return 1;
951         }
952
953         conf_message("configuration written to %s", newname);
954
955         sym_set_change_count(0);
956
957         return 0;
958 }
959
960 /* write a dependency file as used by kbuild to track dependencies */
961 static int conf_write_dep(const char *name)
962 {
963         struct file *file;
964         FILE *out;
965
966         if (!name)
967                 name = ".kconfig.d";
968         out = fopen("..config.tmp", "w");
969         if (!out)
970                 return 1;
971         fprintf(out, "deps_config := \\\n");
972         for (file = file_list; file; file = file->next) {
973                 if (file->next)
974                         fprintf(out, "\t%s \\\n", file->name);
975                 else
976                         fprintf(out, "\t%s\n", file->name);
977         }
978         fprintf(out, "\n%s: \\\n"
979                      "\t$(deps_config)\n\n", conf_get_autoconfig_name());
980
981         env_write_dep(out, conf_get_autoconfig_name());
982
983         fprintf(out, "\n$(deps_config): ;\n");
984         fclose(out);
985
986         if (make_parent_dir(name))
987                 return 1;
988         rename("..config.tmp", name);
989         return 0;
990 }
991
992 static int conf_touch_deps(void)
993 {
994         const char *name;
995         struct symbol *sym;
996         int res, i;
997
998         strcpy(depfile_path, "include/generated/");
999         depfile_prefix_len = strlen(depfile_path);
1000
1001         name = conf_get_autoconfig_name();
1002         conf_read_simple(name, S_DEF_AUTO);
1003         sym_calc_value(modules_sym);
1004
1005         for_all_symbols(i, sym) {
1006                 sym_calc_value(sym);
1007                 if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name)
1008                         continue;
1009                 if (sym->flags & SYMBOL_WRITE) {
1010                         if (sym->flags & SYMBOL_DEF_AUTO) {
1011                                 /*
1012                                  * symbol has old and new value,
1013                                  * so compare them...
1014                                  */
1015                                 switch (sym->type) {
1016                                 case S_BOOLEAN:
1017                                 case S_TRISTATE:
1018                                         if (sym_get_tristate_value(sym) ==
1019                                             sym->def[S_DEF_AUTO].tri)
1020                                                 continue;
1021                                         break;
1022                                 case S_STRING:
1023                                 case S_HEX:
1024                                 case S_INT:
1025                                         if (!strcmp(sym_get_string_value(sym),
1026                                                     sym->def[S_DEF_AUTO].val))
1027                                                 continue;
1028                                         break;
1029                                 default:
1030                                         break;
1031                                 }
1032                         } else {
1033                                 /*
1034                                  * If there is no old value, only 'no' (unset)
1035                                  * is allowed as new value.
1036                                  */
1037                                 switch (sym->type) {
1038                                 case S_BOOLEAN:
1039                                 case S_TRISTATE:
1040                                         if (sym_get_tristate_value(sym) == no)
1041                                                 continue;
1042                                         break;
1043                                 default:
1044                                         break;
1045                                 }
1046                         }
1047                 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
1048                         /* There is neither an old nor a new value. */
1049                         continue;
1050                 /* else
1051                  *      There is an old value, but no new value ('no' (unset)
1052                  *      isn't saved in auto.conf, so the old value is always
1053                  *      different from 'no').
1054                  */
1055
1056                 res = conf_touch_dep(sym->name);
1057                 if (res)
1058                         return res;
1059         }
1060
1061         return 0;
1062 }
1063
1064 int conf_write_autoconf(int overwrite)
1065 {
1066         struct symbol *sym;
1067         const char *name;
1068         const char *autoconf_name = conf_get_autoconfig_name();
1069         FILE *out, *tristate, *out_h, *out_c;
1070         int i;
1071
1072         if (!overwrite && is_present(autoconf_name))
1073                 return 0;
1074
1075         sym_clear_all_valid();
1076
1077         conf_write_dep("include/generated/auto.conf.cmd");
1078
1079         if (conf_touch_deps())
1080                 return 1;
1081
1082         out = fopen(".tmpconfig", "w");
1083         if (!out)
1084                 return 1;
1085
1086         tristate = fopen(".tmpconfig_tristate", "w");
1087         if (!tristate) {
1088                 fclose(out);
1089                 return 1;
1090         }
1091
1092         out_h = fopen(".tmpconfig.h", "w");
1093         if (!out_h) {
1094                 fclose(out);
1095                 fclose(tristate);
1096                 return 1;
1097         }
1098
1099         out_c = fopen(".tmpconfig.cmake", "w");
1100         if (!out_c) {
1101                 fclose(out);
1102                 fclose(tristate);
1103                 fclose(out_h);
1104         }
1105
1106         conf_write_heading(out, &kconfig_printer_cb, NULL);
1107
1108         conf_write_heading(tristate, &tristate_printer_cb, NULL);
1109
1110         conf_write_heading(out_h, &header_printer_cb, NULL);
1111
1112         conf_write_heading(out_c, &kconfig_printer_cmake_cb, NULL);
1113
1114         for_all_symbols(i, sym) {
1115                 sym_calc_value(sym);
1116                 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1117                         continue;
1118
1119                 /* write symbol to auto.conf, tristate and header files */
1120                 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1121
1122                 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1123
1124                 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1125
1126                 conf_write_symbol(out_c, sym, &kconfig_printer_cmake_cb, NULL);
1127         }
1128         fclose(out);
1129         fclose(tristate);
1130         fclose(out_h);
1131         fclose(out_c);
1132
1133         name = getenv("KCONFIG_AUTOHEADER");
1134         if (!name)
1135                 name = "include/generated/autoconf.h";
1136         if (make_parent_dir(name))
1137                 return 1;
1138         if (rename(".tmpconfig.h", name))
1139                 return 1;
1140
1141         name = getenv("KCONFIG_TRISTATE");
1142         if (!name)
1143                 name = "include/generated/tristate.conf";
1144         if (make_parent_dir(name))
1145                 return 1;
1146         if (rename(".tmpconfig_tristate", name))
1147                 return 1;
1148
1149         if (make_parent_dir(autoconf_name))
1150                 return 1;
1151
1152         name = getenv("KCONFIG_CMAKE");
1153         if (!name)
1154                 name = "config.cmake";
1155         if (make_parent_dir(name))
1156                 return 1;
1157         if (rename(".tmpconfig.cmake", name))
1158                 return 1;
1159
1160         /*
1161          * This must be the last step, kbuild has a dependency on auto.conf
1162          * and this marks the successful completion of the previous steps.
1163          */
1164         if (rename(".tmpconfig", autoconf_name))
1165                 return 1;
1166
1167         return 0;
1168 }
1169
1170 static int sym_change_count;
1171 static void (*conf_changed_callback)(void);
1172
1173 void sym_set_change_count(int count)
1174 {
1175         int _sym_change_count = sym_change_count;
1176         sym_change_count = count;
1177         if (conf_changed_callback &&
1178             (bool)_sym_change_count != (bool)count)
1179                 conf_changed_callback();
1180 }
1181
1182 void sym_add_change_count(int count)
1183 {
1184         sym_set_change_count(count + sym_change_count);
1185 }
1186
1187 bool conf_get_changed(void)
1188 {
1189         return sym_change_count;
1190 }
1191
1192 void conf_set_changed_callback(void (*fn)(void))
1193 {
1194         conf_changed_callback = fn;
1195 }
1196
1197 static bool randomize_choice_values(struct symbol *csym)
1198 {
1199         struct property *prop;
1200         struct symbol *sym;
1201         struct expr *e;
1202         int cnt, def;
1203
1204         /*
1205          * If choice is mod then we may have more items selected
1206          * and if no then no-one.
1207          * In both cases stop.
1208          */
1209         if (csym->curr.tri != yes)
1210                 return false;
1211
1212         prop = sym_get_choice_prop(csym);
1213
1214         /* count entries in choice block */
1215         cnt = 0;
1216         expr_list_for_each_sym(prop->expr, e, sym)
1217                 cnt++;
1218
1219         /*
1220          * find a random value and set it to yes,
1221          * set the rest to no so we have only one set
1222          */
1223         def = (rand() % cnt);
1224
1225         cnt = 0;
1226         expr_list_for_each_sym(prop->expr, e, sym) {
1227                 if (def == cnt++) {
1228                         sym->def[S_DEF_USER].tri = yes;
1229                         csym->def[S_DEF_USER].val = sym;
1230                 }
1231                 else {
1232                         sym->def[S_DEF_USER].tri = no;
1233                 }
1234                 sym->flags |= SYMBOL_DEF_USER;
1235                 /* clear VALID to get value calculated */
1236                 sym->flags &= ~SYMBOL_VALID;
1237         }
1238         csym->flags |= SYMBOL_DEF_USER;
1239         /* clear VALID to get value calculated */
1240         csym->flags &= ~(SYMBOL_VALID);
1241
1242         return true;
1243 }
1244
1245 void set_all_choice_values(struct symbol *csym)
1246 {
1247         struct property *prop;
1248         struct symbol *sym;
1249         struct expr *e;
1250
1251         prop = sym_get_choice_prop(csym);
1252
1253         /*
1254          * Set all non-assinged choice values to no
1255          */
1256         expr_list_for_each_sym(prop->expr, e, sym) {
1257                 if (!sym_has_value(sym))
1258                         sym->def[S_DEF_USER].tri = no;
1259         }
1260         csym->flags |= SYMBOL_DEF_USER;
1261         /* clear VALID to get value calculated */
1262         csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1263 }
1264
1265 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1266 {
1267         struct symbol *sym, *csym;
1268         int i, cnt, pby, pty, ptm;      /* pby: probability of bool     = y
1269                                          * pty: probability of tristate = y
1270                                          * ptm: probability of tristate = m
1271                                          */
1272
1273         pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1274                                    * below, otherwise gcc whines about
1275                                    * -Wmaybe-uninitialized */
1276         if (mode == def_random) {
1277                 int n, p[3];
1278                 char *env = getenv("KCONFIG_PROBABILITY");
1279                 n = 0;
1280                 while( env && *env ) {
1281                         char *endp;
1282                         int tmp = strtol( env, &endp, 10 );
1283                         if( tmp >= 0 && tmp <= 100 ) {
1284                                 p[n++] = tmp;
1285                         } else {
1286                                 errno = ERANGE;
1287                                 perror( "KCONFIG_PROBABILITY" );
1288                                 exit( 1 );
1289                         }
1290                         env = (*endp == ':') ? endp+1 : endp;
1291                         if( n >=3 ) {
1292                                 break;
1293                         }
1294                 }
1295                 switch( n ) {
1296                 case 1:
1297                         pby = p[0]; ptm = pby/2; pty = pby-ptm;
1298                         break;
1299                 case 2:
1300                         pty = p[0]; ptm = p[1]; pby = pty + ptm;
1301                         break;
1302                 case 3:
1303                         pby = p[0]; pty = p[1]; ptm = p[2];
1304                         break;
1305                 }
1306
1307                 if( pty+ptm > 100 ) {
1308                         errno = ERANGE;
1309                         perror( "KCONFIG_PROBABILITY" );
1310                         exit( 1 );
1311                 }
1312         }
1313         bool has_changed = false;
1314
1315         for_all_symbols(i, sym) {
1316                 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1317                         continue;
1318                 switch (sym_get_type(sym)) {
1319                 case S_BOOLEAN:
1320                 case S_TRISTATE:
1321                         has_changed = true;
1322                         switch (mode) {
1323                         case def_yes:
1324                                 sym->def[S_DEF_USER].tri = yes;
1325                                 break;
1326                         case def_mod:
1327                                 sym->def[S_DEF_USER].tri = mod;
1328                                 break;
1329                         case def_no:
1330                                 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1331                                         sym->def[S_DEF_USER].tri = yes;
1332                                 else
1333                                         sym->def[S_DEF_USER].tri = no;
1334                                 break;
1335                         case def_random:
1336                                 sym->def[S_DEF_USER].tri = no;
1337                                 cnt = rand() % 100;
1338                                 if (sym->type == S_TRISTATE) {
1339                                         if (cnt < pty)
1340                                                 sym->def[S_DEF_USER].tri = yes;
1341                                         else if (cnt < (pty+ptm))
1342                                                 sym->def[S_DEF_USER].tri = mod;
1343                                 } else if (cnt < pby)
1344                                         sym->def[S_DEF_USER].tri = yes;
1345                                 break;
1346                         default:
1347                                 continue;
1348                         }
1349                         if (!(sym_is_choice(sym) && mode == def_random))
1350                                 sym->flags |= SYMBOL_DEF_USER;
1351                         break;
1352                 default:
1353                         break;
1354                 }
1355
1356         }
1357
1358         sym_clear_all_valid();
1359
1360         /*
1361          * We have different type of choice blocks.
1362          * If curr.tri equals to mod then we can select several
1363          * choice symbols in one block.
1364          * In this case we do nothing.
1365          * If curr.tri equals yes then only one symbol can be
1366          * selected in a choice block and we set it to yes,
1367          * and the rest to no.
1368          */
1369         if (mode != def_random) {
1370                 for_all_symbols(i, csym) {
1371                         if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1372                             sym_is_choice_value(csym))
1373                                 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1374                 }
1375         }
1376
1377         for_all_symbols(i, csym) {
1378                 if (sym_has_value(csym) || !sym_is_choice(csym))
1379                         continue;
1380
1381                 sym_calc_value(csym);
1382                 if (mode == def_random)
1383                         has_changed = randomize_choice_values(csym);
1384                 else {
1385                         set_all_choice_values(csym);
1386                         has_changed = true;
1387                 }
1388         }
1389
1390         return has_changed;
1391 }