1
2
3
4
5
6#include <sys/mman.h>
7#include <sys/stat.h>
8#include <ctype.h>
9#include <errno.h>
10#include <fcntl.h>
11#include <limits.h>
12#include <stdarg.h>
13#include <stdio.h>
14#include <stdlib.h>
15#include <string.h>
16#include <time.h>
17#include <unistd.h>
18
19#include "lkc.h"
20
21
22static bool is_present(const char *path)
23{
24 struct stat st;
25
26 return !stat(path, &st);
27}
28
29
30static bool is_dir(const char *path)
31{
32 struct stat st;
33
34 if (stat(path, &st))
35 return 0;
36
37 return S_ISDIR(st.st_mode);
38}
39
40
41static bool is_same(const char *file1, const char *file2)
42{
43 int fd1, fd2;
44 struct stat st1, st2;
45 void *map1, *map2;
46 bool ret = false;
47
48 fd1 = open(file1, O_RDONLY);
49 if (fd1 < 0)
50 return ret;
51
52 fd2 = open(file2, O_RDONLY);
53 if (fd2 < 0)
54 goto close1;
55
56 ret = fstat(fd1, &st1);
57 if (ret)
58 goto close2;
59 ret = fstat(fd2, &st2);
60 if (ret)
61 goto close2;
62
63 if (st1.st_size != st2.st_size)
64 goto close2;
65
66 map1 = mmap(NULL, st1.st_size, PROT_READ, MAP_PRIVATE, fd1, 0);
67 if (map1 == MAP_FAILED)
68 goto close2;
69
70 map2 = mmap(NULL, st2.st_size, PROT_READ, MAP_PRIVATE, fd2, 0);
71 if (map2 == MAP_FAILED)
72 goto close2;
73
74 if (bcmp(map1, map2, st1.st_size))
75 goto close2;
76
77 ret = true;
78close2:
79 close(fd2);
80close1:
81 close(fd1);
82
83 return ret;
84}
85
86
87
88
89
90
91static int make_parent_dir(const char *path)
92{
93 char tmp[PATH_MAX + 1];
94 char *p;
95
96 strncpy(tmp, path, sizeof(tmp));
97 tmp[sizeof(tmp) - 1] = 0;
98
99
100 p = strrchr(tmp, '/');
101 if (!p)
102 return 0;
103 *(p + 1) = 0;
104
105
106 p = tmp;
107 while (*p == '/')
108 p++;
109
110 while ((p = strchr(p, '/'))) {
111 *p = 0;
112
113
114 if (!is_dir(tmp) && mkdir(tmp, 0755))
115 return -1;
116
117 *p = '/';
118 while (*p == '/')
119 p++;
120 }
121
122 return 0;
123}
124
125static char depfile_path[PATH_MAX];
126static size_t depfile_prefix_len;
127
128
129static int conf_touch_dep(const char *name)
130{
131 int fd, ret;
132 const char *s;
133 char *d, c;
134
135
136 if (depfile_prefix_len + strlen(name) + 3 > sizeof(depfile_path))
137 return -1;
138
139 d = depfile_path + depfile_prefix_len;
140 s = name;
141
142 while ((c = *s++))
143 *d++ = (c == '_') ? '/' : tolower(c);
144 strcpy(d, ".h");
145
146
147 fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
148 if (fd == -1) {
149 if (errno != ENOENT)
150 return -1;
151
152 ret = make_parent_dir(depfile_path);
153 if (ret)
154 return ret;
155
156
157 fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
158 if (fd == -1)
159 return -1;
160 }
161 close(fd);
162
163 return 0;
164}
165
166struct conf_printer {
167 void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
168 void (*print_comment)(FILE *, const char *, void *);
169};
170
171static void conf_warning(const char *fmt, ...)
172 __attribute__ ((format (printf, 1, 2)));
173
174static void conf_message(const char *fmt, ...)
175 __attribute__ ((format (printf, 1, 2)));
176
177static const char *conf_filename;
178static int conf_lineno, conf_warnings;
179
180const char conf_defname[] = "arch/$(ARCH)/defconfig";
181
182static void conf_warning(const char *fmt, ...)
183{
184 va_list ap;
185 va_start(ap, fmt);
186 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
187 vfprintf(stderr, fmt, ap);
188 fprintf(stderr, "\n");
189 va_end(ap);
190 conf_warnings++;
191}
192
193static void conf_default_message_callback(const char *s)
194{
195 printf("#\n# ");
196 printf("%s", s);
197 printf("\n#\n");
198}
199
200static void (*conf_message_callback)(const char *s) =
201 conf_default_message_callback;
202void conf_set_message_callback(void (*fn)(const char *s))
203{
204 conf_message_callback = fn;
205}
206
207static void conf_message(const char *fmt, ...)
208{
209 va_list ap;
210 char buf[4096];
211
212 if (!conf_message_callback)
213 return;
214
215 va_start(ap, fmt);
216
217 vsnprintf(buf, sizeof(buf), fmt, ap);
218 conf_message_callback(buf);
219 va_end(ap);
220}
221
222const char *conf_get_configname(void)
223{
224 char *name = getenv("KCONFIG_CONFIG");
225
226 return name ? name : ".config";
227}
228
229static const char *conf_get_autoconfig_name(void)
230{
231 char *name = getenv("KCONFIG_AUTOCONFIG");
232
233 return name ? name : "include/config/auto.conf";
234}
235
236char *conf_get_default_confname(void)
237{
238 static char fullname[PATH_MAX+1];
239 char *env, *name;
240
241 name = expand_string(conf_defname);
242 env = getenv(SRCTREE);
243 if (env) {
244 snprintf(fullname, sizeof(fullname), "%s/%s", env, name);
245 if (is_present(fullname))
246 return fullname;
247 }
248 return name;
249}
250
251static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
252{
253 char *p2;
254
255 switch (sym->type) {
256 case S_TRISTATE:
257 if (p[0] == 'm') {
258 sym->def[def].tri = mod;
259 sym->flags |= def_flags;
260 break;
261 }
262
263 case S_BOOLEAN:
264 if (p[0] == 'y') {
265 sym->def[def].tri = yes;
266 sym->flags |= def_flags;
267 break;
268 }
269 if (p[0] == 'n') {
270 sym->def[def].tri = no;
271 sym->flags |= def_flags;
272 break;
273 }
274 if (def != S_DEF_AUTO)
275 conf_warning("symbol value '%s' invalid for %s",
276 p, sym->name);
277 return 1;
278 case S_STRING:
279 if (*p++ != '"')
280 break;
281 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
282 if (*p2 == '"') {
283 *p2 = 0;
284 break;
285 }
286 memmove(p2, p2 + 1, strlen(p2));
287 }
288 if (!p2) {
289 if (def != S_DEF_AUTO)
290 conf_warning("invalid string found");
291 return 1;
292 }
293
294 case S_INT:
295 case S_HEX:
296 if (sym_string_valid(sym, p)) {
297 sym->def[def].val = xstrdup(p);
298 sym->flags |= def_flags;
299 } else {
300 if (def != S_DEF_AUTO)
301 conf_warning("symbol value '%s' invalid for %s",
302 p, sym->name);
303 return 1;
304 }
305 break;
306 default:
307 ;
308 }
309 return 0;
310}
311
312#define LINE_GROWTH 16
313static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
314{
315 char *nline;
316 size_t new_size = slen + 1;
317 if (new_size > *n) {
318 new_size += LINE_GROWTH - 1;
319 new_size *= 2;
320 nline = xrealloc(*lineptr, new_size);
321 if (!nline)
322 return -1;
323
324 *lineptr = nline;
325 *n = new_size;
326 }
327
328 (*lineptr)[slen] = c;
329
330 return 0;
331}
332
333static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
334{
335 char *line = *lineptr;
336 size_t slen = 0;
337
338 for (;;) {
339 int c = getc(stream);
340
341 switch (c) {
342 case '\n':
343 if (add_byte(c, &line, slen, n) < 0)
344 goto e_out;
345 slen++;
346
347 case EOF:
348 if (add_byte('\0', &line, slen, n) < 0)
349 goto e_out;
350 *lineptr = line;
351 if (slen == 0)
352 return -1;
353 return slen;
354 default:
355 if (add_byte(c, &line, slen, n) < 0)
356 goto e_out;
357 slen++;
358 }
359 }
360
361e_out:
362 line[slen-1] = '\0';
363 *lineptr = line;
364 return -1;
365}
366
367int conf_read_simple(const char *name, int def)
368{
369 FILE *in = NULL;
370 char *line = NULL;
371 size_t line_asize = 0;
372 char *p, *p2;
373 struct symbol *sym;
374 int i, def_flags;
375
376 if (name) {
377 in = zconf_fopen(name);
378 } else {
379 struct property *prop;
380
381 name = conf_get_configname();
382 in = zconf_fopen(name);
383 if (in)
384 goto load;
385 sym_add_change_count(1);
386 if (!sym_defconfig_list)
387 return 1;
388
389 for_all_defaults(sym_defconfig_list, prop) {
390 if (expr_calc_value(prop->visible.expr) == no ||
391 prop->expr->type != E_SYMBOL)
392 continue;
393 sym_calc_value(prop->expr->left.sym);
394 name = sym_get_string_value(prop->expr->left.sym);
395 in = zconf_fopen(name);
396 if (in) {
397 conf_message("using defaults found in %s",
398 name);
399 goto load;
400 }
401 }
402 }
403 if (!in)
404 return 1;
405
406load:
407 conf_filename = name;
408 conf_lineno = 0;
409 conf_warnings = 0;
410
411 def_flags = SYMBOL_DEF << def;
412 for_all_symbols(i, sym) {
413 sym->flags |= SYMBOL_CHANGED;
414 sym->flags &= ~(def_flags|SYMBOL_VALID);
415 if (sym_is_choice(sym))
416 sym->flags |= def_flags;
417 switch (sym->type) {
418 case S_INT:
419 case S_HEX:
420 case S_STRING:
421 if (sym->def[def].val)
422 free(sym->def[def].val);
423
424 default:
425 sym->def[def].val = NULL;
426 sym->def[def].tri = no;
427 }
428 }
429
430 while (compat_getline(&line, &line_asize, in) != -1) {
431 conf_lineno++;
432 sym = NULL;
433 if (line[0] == '#') {
434 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
435 continue;
436 p = strchr(line + 2 + strlen(CONFIG_), ' ');
437 if (!p)
438 continue;
439 *p++ = 0;
440 if (strncmp(p, "is not set", 10))
441 continue;
442 if (def == S_DEF_USER) {
443 sym = sym_find(line + 2 + strlen(CONFIG_));
444 if (!sym) {
445 sym_add_change_count(1);
446 continue;
447 }
448 } else {
449 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
450 if (sym->type == S_UNKNOWN)
451 sym->type = S_BOOLEAN;
452 }
453 if (sym->flags & def_flags) {
454 conf_warning("override: reassigning to symbol %s", sym->name);
455 }
456 switch (sym->type) {
457 case S_BOOLEAN:
458 case S_TRISTATE:
459 sym->def[def].tri = no;
460 sym->flags |= def_flags;
461 break;
462 default:
463 ;
464 }
465 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
466 p = strchr(line + strlen(CONFIG_), '=');
467 if (!p)
468 continue;
469 *p++ = 0;
470 p2 = strchr(p, '\n');
471 if (p2) {
472 *p2-- = 0;
473 if (*p2 == '\r')
474 *p2 = 0;
475 }
476
477 sym = sym_find(line + strlen(CONFIG_));
478 if (!sym) {
479 if (def == S_DEF_AUTO)
480
481
482
483
484
485
486 conf_touch_dep(line + strlen(CONFIG_));
487 else
488 sym_add_change_count(1);
489 continue;
490 }
491
492 if (sym->flags & def_flags) {
493 conf_warning("override: reassigning to symbol %s", sym->name);
494 }
495 if (conf_set_sym_val(sym, def, def_flags, p))
496 continue;
497 } else {
498 if (line[0] != '\r' && line[0] != '\n')
499 conf_warning("unexpected data: %.*s",
500 (int)strcspn(line, "\r\n"), line);
501
502 continue;
503 }
504
505 if (sym && sym_is_choice_value(sym)) {
506 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
507 switch (sym->def[def].tri) {
508 case no:
509 break;
510 case mod:
511 if (cs->def[def].tri == yes) {
512 conf_warning("%s creates inconsistent choice state", sym->name);
513 cs->flags &= ~def_flags;
514 }
515 break;
516 case yes:
517 if (cs->def[def].tri != no)
518 conf_warning("override: %s changes choice state", sym->name);
519 cs->def[def].val = sym;
520 break;
521 }
522 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
523 }
524 }
525 free(line);
526 fclose(in);
527 return 0;
528}
529
530int conf_read(const char *name)
531{
532 struct symbol *sym;
533 int conf_unsaved = 0;
534 int i;
535
536 sym_set_change_count(0);
537
538 if (conf_read_simple(name, S_DEF_USER)) {
539 sym_calc_value(modules_sym);
540 return 1;
541 }
542
543 sym_calc_value(modules_sym);
544
545 for_all_symbols(i, sym) {
546 sym_calc_value(sym);
547 if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
548 continue;
549 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
550
551 switch (sym->type) {
552 case S_BOOLEAN:
553 case S_TRISTATE:
554 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
555 break;
556 if (!sym_is_choice(sym))
557 continue;
558
559 default:
560 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
561 continue;
562 break;
563 }
564 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
565
566 continue;
567 conf_unsaved++;
568
569 }
570
571 for_all_symbols(i, sym) {
572 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
573
574
575
576
577
578 if (sym->visible == no && !conf_unsaved)
579 sym->flags &= ~SYMBOL_DEF_USER;
580 switch (sym->type) {
581 case S_STRING:
582 case S_INT:
583 case S_HEX:
584
585 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
586 break;
587 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
588 conf_unsaved++;
589 break;
590 default:
591 break;
592 }
593 }
594 }
595
596 sym_add_change_count(conf_warnings || conf_unsaved);
597
598 return 0;
599}
600
601
602
603
604
605
606
607
608
609static void
610kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
611{
612
613 switch (sym->type) {
614 case S_BOOLEAN:
615 case S_TRISTATE:
616 if (*value == 'n') {
617 bool skip_unset = (arg != NULL);
618
619 if (!skip_unset)
620 fprintf(fp, "# %s%s is not set\n",
621 CONFIG_, sym->name);
622 return;
623 }
624 break;
625 default:
626 break;
627 }
628
629 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
630}
631
632static void
633kconfig_print_comment(FILE *fp, const char *value, void *arg)
634{
635 const char *p = value;
636 size_t l;
637
638 for (;;) {
639 l = strcspn(p, "\n");
640 fprintf(fp, "#");
641 if (l) {
642 fprintf(fp, " ");
643 xfwrite(p, l, 1, fp);
644 p += l;
645 }
646 fprintf(fp, "\n");
647 if (*p++ == '\0')
648 break;
649 }
650}
651
652static struct conf_printer kconfig_printer_cb =
653{
654 .print_symbol = kconfig_print_symbol,
655 .print_comment = kconfig_print_comment,
656};
657
658
659
660
661
662
663static void
664header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
665{
666
667 switch (sym->type) {
668 case S_BOOLEAN:
669 case S_TRISTATE: {
670 const char *suffix = "";
671
672 switch (*value) {
673 case 'n':
674 break;
675 case 'm':
676 suffix = "_MODULE";
677
678 default:
679 fprintf(fp, "#define %s%s%s 1\n",
680 CONFIG_, sym->name, suffix);
681 }
682 break;
683 }
684 case S_HEX: {
685 const char *prefix = "";
686
687 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
688 prefix = "0x";
689 fprintf(fp, "#define %s%s %s%s\n",
690 CONFIG_, sym->name, prefix, value);
691 break;
692 }
693 case S_STRING:
694 case S_INT:
695 fprintf(fp, "#define %s%s %s\n",
696 CONFIG_, sym->name, value);
697 break;
698 default:
699 break;
700 }
701
702}
703
704static void
705header_print_comment(FILE *fp, const char *value, void *arg)
706{
707 const char *p = value;
708 size_t l;
709
710 fprintf(fp, "/*\n");
711 for (;;) {
712 l = strcspn(p, "\n");
713 fprintf(fp, " *");
714 if (l) {
715 fprintf(fp, " ");
716 xfwrite(p, l, 1, fp);
717 p += l;
718 }
719 fprintf(fp, "\n");
720 if (*p++ == '\0')
721 break;
722 }
723 fprintf(fp, " */\n");
724}
725
726static struct conf_printer header_printer_cb =
727{
728 .print_symbol = header_print_symbol,
729 .print_comment = header_print_comment,
730};
731
732
733
734
735
736
737static void
738tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
739{
740
741 if (sym->type == S_TRISTATE && *value != 'n')
742 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
743}
744
745static struct conf_printer tristate_printer_cb =
746{
747 .print_symbol = tristate_print_symbol,
748 .print_comment = kconfig_print_comment,
749};
750
751static void conf_write_symbol(FILE *fp, struct symbol *sym,
752 struct conf_printer *printer, void *printer_arg)
753{
754 const char *str;
755
756 switch (sym->type) {
757 case S_UNKNOWN:
758 break;
759 case S_STRING:
760 str = sym_get_string_value(sym);
761 str = sym_escape_string_value(str);
762 printer->print_symbol(fp, sym, str, printer_arg);
763 free((void *)str);
764 break;
765 default:
766 str = sym_get_string_value(sym);
767 printer->print_symbol(fp, sym, str, printer_arg);
768 }
769}
770
771static void
772conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
773{
774 char buf[256];
775
776 snprintf(buf, sizeof(buf),
777 "\n"
778 "Automatically generated file; DO NOT EDIT.\n"
779 "%s\n",
780 rootmenu.prompt->text);
781
782 printer->print_comment(fp, buf, printer_arg);
783}
784
785
786
787
788
789int conf_write_defconfig(const char *filename)
790{
791 struct symbol *sym;
792 struct menu *menu;
793 FILE *out;
794
795 out = fopen(filename, "w");
796 if (!out)
797 return 1;
798
799 sym_clear_all_valid();
800
801
802 menu = rootmenu.list;
803
804 while (menu != NULL)
805 {
806 sym = menu->sym;
807 if (sym == NULL) {
808 if (!menu_is_visible(menu))
809 goto next_menu;
810 } else if (!sym_is_choice(sym)) {
811 sym_calc_value(sym);
812 if (!(sym->flags & SYMBOL_WRITE))
813 goto next_menu;
814 sym->flags &= ~SYMBOL_WRITE;
815
816 if (!sym_is_changable(sym))
817 goto next_menu;
818
819 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
820 goto next_menu;
821
822
823
824
825
826
827
828
829 if (sym_is_choice_value(sym)) {
830 struct symbol *cs;
831 struct symbol *ds;
832
833 cs = prop_get_symbol(sym_get_choice_prop(sym));
834 ds = sym_choice_default(cs);
835 if (!sym_is_optional(cs) && sym == ds) {
836 if ((sym->type == S_BOOLEAN) &&
837 sym_get_tristate_value(sym) == yes)
838 goto next_menu;
839 }
840 }
841 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
842 }
843next_menu:
844 if (menu->list != NULL) {
845 menu = menu->list;
846 }
847 else if (menu->next != NULL) {
848 menu = menu->next;
849 } else {
850 while ((menu = menu->parent)) {
851 if (menu->next != NULL) {
852 menu = menu->next;
853 break;
854 }
855 }
856 }
857 }
858 fclose(out);
859 return 0;
860}
861
862int conf_write(const char *name)
863{
864 FILE *out;
865 struct symbol *sym;
866 struct menu *menu;
867 const char *str;
868 char tmpname[PATH_MAX + 1], oldname[PATH_MAX + 1];
869 char *env;
870 bool need_newline = false;
871
872 if (!name)
873 name = conf_get_configname();
874
875 if (!*name) {
876 fprintf(stderr, "config name is empty\n");
877 return -1;
878 }
879
880 if (is_dir(name)) {
881 fprintf(stderr, "%s: Is a directory\n", name);
882 return -1;
883 }
884
885 if (make_parent_dir(name))
886 return -1;
887
888 env = getenv("KCONFIG_OVERWRITECONFIG");
889 if (env && *env) {
890 *tmpname = 0;
891 out = fopen(name, "w");
892 } else {
893 snprintf(tmpname, sizeof(tmpname), "%s.%d.tmp",
894 name, (int)getpid());
895 out = fopen(tmpname, "w");
896 }
897 if (!out)
898 return 1;
899
900 conf_write_heading(out, &kconfig_printer_cb, NULL);
901
902 if (!conf_get_changed())
903 sym_clear_all_valid();
904
905 menu = rootmenu.list;
906 while (menu) {
907 sym = menu->sym;
908 if (!sym) {
909 if (!menu_is_visible(menu))
910 goto next;
911 str = menu_get_prompt(menu);
912 fprintf(out, "\n"
913 "#\n"
914 "# %s\n"
915 "#\n", str);
916 need_newline = false;
917 } else if (!(sym->flags & SYMBOL_CHOICE)) {
918 sym_calc_value(sym);
919 if (!(sym->flags & SYMBOL_WRITE))
920 goto next;
921 if (need_newline) {
922 fprintf(out, "\n");
923 need_newline = false;
924 }
925 sym->flags &= ~SYMBOL_WRITE;
926 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
927 }
928
929next:
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->sym && menu_is_visible(menu) &&
938 menu != &rootmenu) {
939 str = menu_get_prompt(menu);
940 fprintf(out, "# end of %s\n", str);
941 need_newline = true;
942 }
943 if (menu->next) {
944 menu = menu->next;
945 break;
946 }
947 }
948 }
949 fclose(out);
950
951 if (*tmpname) {
952 if (is_same(name, tmpname)) {
953 conf_message("No change to %s", name);
954 unlink(tmpname);
955 sym_set_change_count(0);
956 return 0;
957 }
958
959 snprintf(oldname, sizeof(oldname), "%s.old", name);
960 rename(name, oldname);
961 if (rename(tmpname, name))
962 return 1;
963 }
964
965 conf_message("configuration written to %s", name);
966
967 sym_set_change_count(0);
968
969 return 0;
970}
971
972
973static int conf_write_dep(const char *name)
974{
975 struct file *file;
976 FILE *out;
977
978 out = fopen("..config.tmp", "w");
979 if (!out)
980 return 1;
981 fprintf(out, "deps_config := \\\n");
982 for (file = file_list; file; file = file->next) {
983 if (file->next)
984 fprintf(out, "\t%s \\\n", file->name);
985 else
986 fprintf(out, "\t%s\n", file->name);
987 }
988 fprintf(out, "\n%s: \\\n"
989 "\t$(deps_config)\n\n", conf_get_autoconfig_name());
990
991 env_write_dep(out, conf_get_autoconfig_name());
992
993 fprintf(out, "\n$(deps_config): ;\n");
994 fclose(out);
995
996 if (make_parent_dir(name))
997 return 1;
998 rename("..config.tmp", name);
999 return 0;
1000}
1001
1002static int conf_touch_deps(void)
1003{
1004 const char *name;
1005 struct symbol *sym;
1006 int res, i;
1007
1008 strcpy(depfile_path, "include/config/");
1009 depfile_prefix_len = strlen(depfile_path);
1010
1011 name = conf_get_autoconfig_name();
1012 conf_read_simple(name, S_DEF_AUTO);
1013 sym_calc_value(modules_sym);
1014
1015 for_all_symbols(i, sym) {
1016 sym_calc_value(sym);
1017 if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name)
1018 continue;
1019 if (sym->flags & SYMBOL_WRITE) {
1020 if (sym->flags & SYMBOL_DEF_AUTO) {
1021
1022
1023
1024
1025 switch (sym->type) {
1026 case S_BOOLEAN:
1027 case S_TRISTATE:
1028 if (sym_get_tristate_value(sym) ==
1029 sym->def[S_DEF_AUTO].tri)
1030 continue;
1031 break;
1032 case S_STRING:
1033 case S_HEX:
1034 case S_INT:
1035 if (!strcmp(sym_get_string_value(sym),
1036 sym->def[S_DEF_AUTO].val))
1037 continue;
1038 break;
1039 default:
1040 break;
1041 }
1042 } else {
1043
1044
1045
1046
1047 switch (sym->type) {
1048 case S_BOOLEAN:
1049 case S_TRISTATE:
1050 if (sym_get_tristate_value(sym) == no)
1051 continue;
1052 break;
1053 default:
1054 break;
1055 }
1056 }
1057 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
1058
1059 continue;
1060
1061
1062
1063
1064
1065
1066 res = conf_touch_dep(sym->name);
1067 if (res)
1068 return res;
1069 }
1070
1071 return 0;
1072}
1073
1074int conf_write_autoconf(int overwrite)
1075{
1076 struct symbol *sym;
1077 const char *name;
1078 const char *autoconf_name = conf_get_autoconfig_name();
1079 FILE *out, *tristate, *out_h;
1080 int i;
1081
1082 if (!overwrite && is_present(autoconf_name))
1083 return 0;
1084
1085 sym_clear_all_valid();
1086
1087 conf_write_dep("include/config/auto.conf.cmd");
1088
1089 if (conf_touch_deps())
1090 return 1;
1091
1092 out = fopen(".tmpconfig", "w");
1093 if (!out)
1094 return 1;
1095
1096 tristate = fopen(".tmpconfig_tristate", "w");
1097 if (!tristate) {
1098 fclose(out);
1099 return 1;
1100 }
1101
1102 out_h = fopen(".tmpconfig.h", "w");
1103 if (!out_h) {
1104 fclose(out);
1105 fclose(tristate);
1106 return 1;
1107 }
1108
1109 conf_write_heading(out, &kconfig_printer_cb, NULL);
1110
1111 conf_write_heading(tristate, &tristate_printer_cb, NULL);
1112
1113 conf_write_heading(out_h, &header_printer_cb, NULL);
1114
1115 for_all_symbols(i, sym) {
1116 sym_calc_value(sym);
1117 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1118 continue;
1119
1120
1121 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1122
1123 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1124
1125 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1126 }
1127 fclose(out);
1128 fclose(tristate);
1129 fclose(out_h);
1130
1131 name = getenv("KCONFIG_AUTOHEADER");
1132 if (!name)
1133 name = "include/generated/autoconf.h";
1134 if (make_parent_dir(name))
1135 return 1;
1136 if (rename(".tmpconfig.h", name))
1137 return 1;
1138
1139 name = getenv("KCONFIG_TRISTATE");
1140 if (!name)
1141 name = "include/config/tristate.conf";
1142 if (make_parent_dir(name))
1143 return 1;
1144 if (rename(".tmpconfig_tristate", name))
1145 return 1;
1146
1147 if (make_parent_dir(autoconf_name))
1148 return 1;
1149
1150
1151
1152
1153 if (rename(".tmpconfig", autoconf_name))
1154 return 1;
1155
1156 return 0;
1157}
1158
1159static int sym_change_count;
1160static void (*conf_changed_callback)(void);
1161
1162void sym_set_change_count(int count)
1163{
1164 int _sym_change_count = sym_change_count;
1165 sym_change_count = count;
1166 if (conf_changed_callback &&
1167 (bool)_sym_change_count != (bool)count)
1168 conf_changed_callback();
1169}
1170
1171void sym_add_change_count(int count)
1172{
1173 sym_set_change_count(count + sym_change_count);
1174}
1175
1176bool conf_get_changed(void)
1177{
1178 return sym_change_count;
1179}
1180
1181void conf_set_changed_callback(void (*fn)(void))
1182{
1183 conf_changed_callback = fn;
1184}
1185
1186static bool randomize_choice_values(struct symbol *csym)
1187{
1188 struct property *prop;
1189 struct symbol *sym;
1190 struct expr *e;
1191 int cnt, def;
1192
1193
1194
1195
1196
1197
1198 if (csym->curr.tri != yes)
1199 return false;
1200
1201 prop = sym_get_choice_prop(csym);
1202
1203
1204 cnt = 0;
1205 expr_list_for_each_sym(prop->expr, e, sym)
1206 cnt++;
1207
1208
1209
1210
1211
1212 def = (rand() % cnt);
1213
1214 cnt = 0;
1215 expr_list_for_each_sym(prop->expr, e, sym) {
1216 if (def == cnt++) {
1217 sym->def[S_DEF_USER].tri = yes;
1218 csym->def[S_DEF_USER].val = sym;
1219 }
1220 else {
1221 sym->def[S_DEF_USER].tri = no;
1222 }
1223 sym->flags |= SYMBOL_DEF_USER;
1224
1225 sym->flags &= ~SYMBOL_VALID;
1226 }
1227 csym->flags |= SYMBOL_DEF_USER;
1228
1229 csym->flags &= ~(SYMBOL_VALID);
1230
1231 return true;
1232}
1233
1234void set_all_choice_values(struct symbol *csym)
1235{
1236 struct property *prop;
1237 struct symbol *sym;
1238 struct expr *e;
1239
1240 prop = sym_get_choice_prop(csym);
1241
1242
1243
1244
1245 expr_list_for_each_sym(prop->expr, e, sym) {
1246 if (!sym_has_value(sym))
1247 sym->def[S_DEF_USER].tri = no;
1248 }
1249 csym->flags |= SYMBOL_DEF_USER;
1250
1251 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1252}
1253
1254bool conf_set_all_new_symbols(enum conf_def_mode mode)
1255{
1256 struct symbol *sym, *csym;
1257 int i, cnt, pby, pty, ptm;
1258
1259
1260
1261
1262 pby = 50; pty = ptm = 33;
1263
1264
1265 if (mode == def_random) {
1266 int n, p[3];
1267 char *env = getenv("KCONFIG_PROBABILITY");
1268 n = 0;
1269 while( env && *env ) {
1270 char *endp;
1271 int tmp = strtol( env, &endp, 10 );
1272 if( tmp >= 0 && tmp <= 100 ) {
1273 p[n++] = tmp;
1274 } else {
1275 errno = ERANGE;
1276 perror( "KCONFIG_PROBABILITY" );
1277 exit( 1 );
1278 }
1279 env = (*endp == ':') ? endp+1 : endp;
1280 if( n >=3 ) {
1281 break;
1282 }
1283 }
1284 switch( n ) {
1285 case 1:
1286 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1287 break;
1288 case 2:
1289 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1290 break;
1291 case 3:
1292 pby = p[0]; pty = p[1]; ptm = p[2];
1293 break;
1294 }
1295
1296 if( pty+ptm > 100 ) {
1297 errno = ERANGE;
1298 perror( "KCONFIG_PROBABILITY" );
1299 exit( 1 );
1300 }
1301 }
1302 bool has_changed = false;
1303
1304 for_all_symbols(i, sym) {
1305 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1306 continue;
1307 switch (sym_get_type(sym)) {
1308 case S_BOOLEAN:
1309 case S_TRISTATE:
1310 has_changed = true;
1311 switch (mode) {
1312 case def_yes:
1313 sym->def[S_DEF_USER].tri = yes;
1314 break;
1315 case def_mod:
1316 sym->def[S_DEF_USER].tri = mod;
1317 break;
1318 case def_no:
1319 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1320 sym->def[S_DEF_USER].tri = yes;
1321 else
1322 sym->def[S_DEF_USER].tri = no;
1323 break;
1324 case def_random:
1325 sym->def[S_DEF_USER].tri = no;
1326 cnt = rand() % 100;
1327 if (sym->type == S_TRISTATE) {
1328 if (cnt < pty)
1329 sym->def[S_DEF_USER].tri = yes;
1330 else if (cnt < (pty+ptm))
1331 sym->def[S_DEF_USER].tri = mod;
1332 } else if (cnt < pby)
1333 sym->def[S_DEF_USER].tri = yes;
1334 break;
1335 default:
1336 continue;
1337 }
1338 if (!(sym_is_choice(sym) && mode == def_random))
1339 sym->flags |= SYMBOL_DEF_USER;
1340 break;
1341 default:
1342 break;
1343 }
1344
1345 }
1346
1347 sym_clear_all_valid();
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358 if (mode != def_random) {
1359 for_all_symbols(i, csym) {
1360 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1361 sym_is_choice_value(csym))
1362 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1363 }
1364 }
1365
1366 for_all_symbols(i, csym) {
1367 if (sym_has_value(csym) || !sym_is_choice(csym))
1368 continue;
1369
1370 sym_calc_value(csym);
1371 if (mode == def_random)
1372 has_changed = randomize_choice_values(csym);
1373 else {
1374 set_all_choice_values(csym);
1375 has_changed = true;
1376 }
1377 }
1378
1379 return has_changed;
1380}
1381
