1
2
3
4
5
6#include <sys/stat.h>
7#include <ctype.h>
8#include <fcntl.h>
9#include <stdio.h>
10#include <stdlib.h>
11#include <string.h>
12#include <time.h>
13#include <unistd.h>
14
15#define LKC_DIRECT_LINK
16#include "lkc.h"
17
18#ifdef WIN32
19#define mkdir(x,y) mkdir(x)
20#define UNLINK_IF_NECESSARY(x) unlink(x)
21#else
22#define UNLINK_IF_NECESSARY(X)
23#endif
24
25static void conf_warning(const char *fmt, ...)
26 __attribute__ ((format (printf, 1, 2)));
27
28static const char *conf_filename;
29static int conf_lineno, conf_warnings, conf_unsaved;
30
31const char conf_defname[] = "arch/$ARCH/defconfig";
32
33static void conf_warning(const char *fmt, ...)
34{
35 va_list ap;
36 va_start(ap, fmt);
37 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
38 vfprintf(stderr, fmt, ap);
39 fprintf(stderr, "\n");
40 va_end(ap);
41 conf_warnings++;
42}
43
44const char *conf_get_configname(void)
45{
46 char *name = getenv("KCONFIG_CONFIG");
47
48 return name ? name : ".config";
49}
50
51static char *conf_expand_value(const char *in)
52{
53 struct symbol *sym;
54 const char *src;
55 static char res_value[SYMBOL_MAXLENGTH];
56 char *dst, name[SYMBOL_MAXLENGTH];
57
58 res_value[0] = 0;
59 dst = name;
60 while ((src = strchr(in, '$'))) {
61 strncat(res_value, in, src - in);
62 src++;
63 dst = name;
64 while (isalnum(*src) || *src == '_')
65 *dst++ = *src++;
66 *dst = 0;
67 sym = sym_lookup(name, 0);
68 sym_calc_value(sym);
69 strcat(res_value, sym_get_string_value(sym));
70 in = src;
71 }
72 strcat(res_value, in);
73
74 return res_value;
75}
76
77char *conf_get_default_confname(void)
78{
79 struct stat buf;
80 static char fullname[PATH_MAX+1];
81 char *env, *name;
82
83 name = conf_expand_value(conf_defname);
84 env = getenv(SRCTREE);
85 if (env) {
86 sprintf(fullname, "%s/%s", env, name);
87 if (!stat(fullname, &buf))
88 return fullname;
89 }
90 return name;
91}
92
93static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
94{
95 char *p2;
96
97 switch (sym->type) {
98 case S_TRISTATE:
99 if (p[0] == 'm') {
100 sym->def[def].tri = mod;
101 sym->flags |= def_flags;
102 break;
103 }
104 case S_BOOLEAN:
105 if (p[0] == 'y') {
106 sym->def[def].tri = yes;
107 sym->flags |= def_flags;
108 break;
109 }
110 if (p[0] == 'n') {
111 sym->def[def].tri = no;
112 sym->flags |= def_flags;
113 break;
114 }
115 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
116 break;
117 case S_OTHER:
118 if (*p != '"') {
119 for (p2 = p; *p2 && !isspace(*p2); p2++)
120 ;
121 sym->type = S_STRING;
122 goto done;
123 }
124 case S_STRING:
125 if (*p++ != '"')
126 break;
127 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
128 if (*p2 == '"') {
129 *p2 = 0;
130 break;
131 }
132 memmove(p2, p2 + 1, strlen(p2));
133 }
134 if (!p2) {
135 conf_warning("invalid string found");
136 return 1;
137 }
138 case S_INT:
139 case S_HEX:
140 done:
141 if (sym_string_valid(sym, p)) {
142 sym->def[def].val = strdup(p);
143 sym->flags |= def_flags;
144 } else {
145 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
146 return 1;
147 }
148 break;
149 default:
150 ;
151 }
152 return 0;
153}
154
155int conf_read_simple(const char *name, int def)
156{
157 FILE *in = NULL;
158 char line[1024];
159 char *p, *p2;
160 struct symbol *sym;
161 int i, def_flags;
162
163 if (name) {
164 in = zconf_fopen(name);
165 } else {
166 struct property *prop;
167
168 name = conf_get_configname();
169 in = zconf_fopen(name);
170 if (in)
171 goto load;
172 sym_add_change_count(1);
173 if (!sym_defconfig_list)
174 return 1;
175
176 for_all_defaults(sym_defconfig_list, prop) {
177 if (expr_calc_value(prop->visible.expr) == no ||
178 prop->expr->type != E_SYMBOL)
179 continue;
180 name = conf_expand_value(prop->expr->left.sym->name);
181 in = zconf_fopen(name);
182 if (in) {
183 printf(_("#\n"
184 "# using defaults found in %s\n"
185 "#\n"), name);
186 goto load;
187 }
188 }
189 }
190 if (!in)
191 return 1;
192
193load:
194 conf_filename = name;
195 conf_lineno = 0;
196 conf_warnings = 0;
197 conf_unsaved = 0;
198
199 def_flags = SYMBOL_DEF << def;
200 for_all_symbols(i, sym) {
201 sym->flags |= SYMBOL_CHANGED;
202 sym->flags &= ~(def_flags|SYMBOL_VALID);
203 if (sym_is_choice(sym))
204 sym->flags |= def_flags;
205 switch (sym->type) {
206 case S_INT:
207 case S_HEX:
208 case S_STRING:
209 if (sym->def[def].val)
210 free(sym->def[def].val);
211 default:
212 sym->def[def].val = NULL;
213 sym->def[def].tri = no;
214 }
215 }
216
217 while (fgets(line, sizeof(line), in)) {
218 conf_lineno++;
219 sym = NULL;
220 switch (line[0]) {
221 case '#':
222 if (memcmp(line + 2, "CONFIG_", 7))
223 continue;
224 p = strchr(line + 9, ' ');
225 if (!p)
226 continue;
227 *p++ = 0;
228 if (strncmp(p, "is not set", 10))
229 continue;
230 if (def == S_DEF_USER) {
231 sym = sym_find(line + 9);
232 if (!sym) {
233 conf_warning("trying to assign nonexistent symbol %s", line + 9);
234 break;
235 }
236 } else {
237 sym = sym_lookup(line + 9, 0);
238 if (sym->type == S_UNKNOWN)
239 sym->type = S_BOOLEAN;
240 }
241 if (sym->flags & def_flags) {
242 conf_warning("override: reassigning to symbol %s", sym->name);
243 }
244 switch (sym->type) {
245 case S_BOOLEAN:
246 case S_TRISTATE:
247 sym->def[def].tri = no;
248 sym->flags |= def_flags;
249 break;
250 default:
251 ;
252 }
253 break;
254 case 'C':
255 if (memcmp(line, "CONFIG_", 7)) {
256 conf_warning("unexpected data");
257 continue;
258 }
259 p = strchr(line + 7, '=');
260 if (!p)
261 continue;
262 *p++ = 0;
263 p2 = strchr(p, '\n');
264 if (p2) {
265 *p2-- = 0;
266 if (*p2 == '\r')
267 *p2 = 0;
268 }
269 if (def == S_DEF_USER) {
270 sym = sym_find(line + 7);
271 if (!sym) {
272 conf_warning("trying to assign nonexistent symbol %s", line + 7);
273 break;
274 }
275 } else {
276 sym = sym_lookup(line + 7, 0);
277 if (sym->type == S_UNKNOWN)
278 sym->type = S_OTHER;
279 }
280 if (sym->flags & def_flags) {
281 conf_warning("override: reassigning to symbol %s", sym->name);
282 }
283 if (conf_set_sym_val(sym, def, def_flags, p))
284 continue;
285 break;
286 case '\r':
287 case '\n':
288 break;
289 default:
290 conf_warning("unexpected data");
291 continue;
292 }
293 if (sym && sym_is_choice_value(sym)) {
294 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
295 switch (sym->def[def].tri) {
296 case no:
297 break;
298 case mod:
299 if (cs->def[def].tri == yes) {
300 conf_warning("%s creates inconsistent choice state", sym->name);
301 cs->flags &= ~def_flags;
302 }
303 break;
304 case yes:
305 if (cs->def[def].tri != no)
306 conf_warning("override: %s changes choice state", sym->name);
307 cs->def[def].val = sym;
308 break;
309 }
310 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
311 }
312 }
313 fclose(in);
314
315 if (modules_sym)
316 sym_calc_value(modules_sym);
317 return 0;
318}
319
320int conf_read(const char *name)
321{
322 struct symbol *sym, *choice_sym;
323 struct property *prop;
324 struct expr *e;
325 int i, flags;
326
327 sym_set_change_count(0);
328
329 if (conf_read_simple(name, S_DEF_USER))
330 return 1;
331
332 for_all_symbols(i, sym) {
333 sym_calc_value(sym);
334 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
335 goto sym_ok;
336 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
337
338 switch (sym->type) {
339 case S_BOOLEAN:
340 case S_TRISTATE:
341 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
342 break;
343 if (!sym_is_choice(sym))
344 goto sym_ok;
345 default:
346 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
347 goto sym_ok;
348 break;
349 }
350 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
351
352 goto sym_ok;
353 conf_unsaved++;
354
355 sym_ok:
356 if (!sym_is_choice(sym))
357 continue;
358
359
360
361 prop = sym_get_choice_prop(sym);
362 flags = sym->flags;
363 expr_list_for_each_sym(prop->expr, e, choice_sym)
364 if (choice_sym->visible != no)
365 flags &= choice_sym->flags;
366 sym->flags &= flags | ~SYMBOL_DEF_USER;
367 }
368
369 for_all_symbols(i, sym) {
370 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
371
372
373
374
375
376 if (sym->visible == no && !conf_unsaved)
377 sym->flags &= ~SYMBOL_DEF_USER;
378 switch (sym->type) {
379 case S_STRING:
380 case S_INT:
381 case S_HEX:
382
383 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
384 break;
385 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
386 conf_unsaved++;
387 break;
388 default:
389 break;
390 }
391 }
392 }
393
394 sym_add_change_count(conf_warnings || conf_unsaved);
395
396 return 0;
397}
398
399int conf_write(const char *name)
400{
401 FILE *out;
402 struct symbol *sym;
403 struct menu *menu;
404 const char *basename;
405 char dirname[128], tmpname[128], newname[128];
406 int type, l;
407 const char *str;
408 time_t now;
409 int use_timestamp = 1;
410 char *env;
411
412 dirname[0] = 0;
413 if (name && name[0]) {
414 struct stat st;
415 char *slash;
416
417 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
418 strcpy(dirname, name);
419 strcat(dirname, "/");
420 basename = conf_get_configname();
421 } else if ((slash = strrchr(name, '/'))) {
422 int size = slash - name + 1;
423 memcpy(dirname, name, size);
424 dirname[size] = 0;
425 if (slash[1])
426 basename = slash + 1;
427 else
428 basename = conf_get_configname();
429 } else
430 basename = name;
431 } else
432 basename = conf_get_configname();
433
434 sprintf(newname, "%s%s", dirname, basename);
435 env = getenv("KCONFIG_OVERWRITECONFIG");
436 if (!env || !*env) {
437 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
438 out = fopen(tmpname, "w");
439 } else {
440 *tmpname = 0;
441 out = fopen(newname, "w");
442 }
443 if (!out)
444 return 1;
445
446 sym = sym_lookup("KERNELVERSION", 0);
447 sym_calc_value(sym);
448 time(&now);
449 env = getenv("KCONFIG_NOTIMESTAMP");
450 if (env && *env)
451 use_timestamp = 0;
452
453 fprintf(out, _("#\n"
454 "# Automatically generated make config: don't edit\n"
455 "# libpayload version: %s\n"
456 "%s%s"
457 "#\n"),
458 getenv("KERNELVERSION")?getenv("KERNELVERSION"):"",
459 use_timestamp ? "# " : "",
460 use_timestamp ? ctime(&now) : "");
461
462 if (!conf_get_changed())
463 sym_clear_all_valid();
464
465 menu = rootmenu.list;
466 while (menu) {
467 sym = menu->sym;
468 if (!sym) {
469 if (!menu_is_visible(menu))
470 goto next;
471 str = menu_get_prompt(menu);
472 fprintf(out, "\n"
473 "#\n"
474 "# %s\n"
475 "#\n", str);
476 } else if (!(sym->flags & SYMBOL_CHOICE)) {
477 sym_calc_value(sym);
478 if (!(sym->flags & SYMBOL_WRITE))
479 goto next;
480 sym->flags &= ~SYMBOL_WRITE;
481 type = sym->type;
482 if (type == S_TRISTATE) {
483 sym_calc_value(modules_sym);
484 if (modules_sym->curr.tri == no)
485 type = S_BOOLEAN;
486 }
487 switch (type) {
488 case S_BOOLEAN:
489 case S_TRISTATE:
490 switch (sym_get_tristate_value(sym)) {
491 case no:
492 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
493 break;
494 case mod:
495 fprintf(out, "CONFIG_%s=m\n", sym->name);
496 break;
497 case yes:
498 fprintf(out, "CONFIG_%s=y\n", sym->name);
499 break;
500 }
501 break;
502 case S_STRING:
503 str = sym_get_string_value(sym);
504 fprintf(out, "CONFIG_%s=\"", sym->name);
505 while (1) {
506 l = strcspn(str, "\"\\");
507 if (l) {
508 fwrite(str, l, 1, out);
509 str += l;
510 }
511 if (!*str)
512 break;
513 fprintf(out, "\\%c", *str++);
514 }
515 fputs("\"\n", out);
516 break;
517 case S_HEX:
518 str = sym_get_string_value(sym);
519 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
520 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
521 break;
522 }
523 case S_INT:
524 str = sym_get_string_value(sym);
525 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
526 break;
527 }
528 }
529
530 next:
531 if (menu->list) {
532 menu = menu->list;
533 continue;
534 }
535 if (menu->next)
536 menu = menu->next;
537 else while ((menu = menu->parent)) {
538 if (menu->next) {
539 menu = menu->next;
540 break;
541 }
542 }
543 }
544 fclose(out);
545
546 if (*tmpname) {
547 strcat(dirname, basename);
548 strcat(dirname, ".old");
549 UNLINK_IF_NECESSARY(dirname);
550 rename(newname, dirname);
551 if (rename(tmpname, newname))
552 return 1;
553 }
554
555 printf(_("#\n"
556 "# configuration written to %s\n"
557 "#\n"), newname);
558
559 sym_set_change_count(0);
560
561 return 0;
562}
563
564int conf_split_config(void)
565{
566 char *name, path[128];
567 char *s, *d, c;
568 struct symbol *sym;
569 struct stat sb;
570 int res, i, fd;
571
572 name = getenv("KCONFIG_AUTOCONFIG");
573 if (!name)
574 name = "include/config/auto.conf";
575 conf_read_simple(name, S_DEF_AUTO);
576
577 if (chdir("build"))
578 return 1;
579
580 res = 0;
581 for_all_symbols(i, sym) {
582 sym_calc_value(sym);
583 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
584 continue;
585 if (sym->flags & SYMBOL_WRITE) {
586 if (sym->flags & SYMBOL_DEF_AUTO) {
587
588
589
590
591 switch (sym->type) {
592 case S_BOOLEAN:
593 case S_TRISTATE:
594 if (sym_get_tristate_value(sym) ==
595 sym->def[S_DEF_AUTO].tri)
596 continue;
597 break;
598 case S_STRING:
599 case S_HEX:
600 case S_INT:
601 if (!strcmp(sym_get_string_value(sym),
602 sym->def[S_DEF_AUTO].val))
603 continue;
604 break;
605 default:
606 break;
607 }
608 } else {
609
610
611
612
613 switch (sym->type) {
614 case S_BOOLEAN:
615 case S_TRISTATE:
616 if (sym_get_tristate_value(sym) == no)
617 continue;
618 break;
619 default:
620 break;
621 }
622 }
623 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
624
625 continue;
626
627
628
629
630
631
632
633 s = sym->name;
634 d = path;
635 while ((c = *s++)) {
636 c = tolower(c);
637 *d++ = (c == '_') ? '/' : c;
638 }
639 strcpy(d, ".h");
640
641
642 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
643 if (fd == -1) {
644 if (errno != ENOENT) {
645 res = 1;
646 break;
647 }
648
649
650
651
652 d = path;
653 while ((d = strchr(d, '/'))) {
654 *d = 0;
655 if (stat(path, &sb) && mkdir(path, 0755)) {
656 res = 1;
657 goto out;
658 }
659 *d++ = '/';
660 }
661
662 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
663 if (fd == -1) {
664 res = 1;
665 break;
666 }
667 }
668 close(fd);
669 }
670out:
671 if (chdir("../.."))
672 return 1;
673
674 return res;
675}
676
677int conf_write_autoconf(void)
678{
679 struct symbol *sym;
680 const char *str;
681 char *name;
682 FILE *out, *out_h;
683 time_t now;
684 int i, l;
685
686 sym_clear_all_valid();
687
688 file_write_dep("build/auto.conf.cmd");
689
690#if 0
691 if (conf_split_config())
692 return 1;
693#endif
694
695 out = fopen(".tmpconfig", "w");
696 if (!out)
697 return 1;
698
699 out_h = fopen(".tmpconfig.h", "w");
700 if (!out_h) {
701 fclose(out);
702 return 1;
703 }
704
705 sym = sym_lookup("KERNELVERSION", 0);
706 sym_calc_value(sym);
707 time(&now);
708 fprintf(out, "#\n"
709 "# Automatically generated make config: don't edit\n"
710 "# libpayload version: %s\n"
711 "# %s"
712 "#\n",
713 getenv("KERNELVERSION")?getenv("KERNELVERSION"):"", ctime(&now));
714 fprintf(out_h, "/*\n"
715 " * Automatically generated C config: don't edit\n"
716 " * libpayload version: %s\n"
717 " * %s"
718 " */\n"
719 "#define AUTOCONF_INCLUDED\n",
720 getenv("KERNELVERSION")?getenv("KERNELVERSION"):"", ctime(&now));
721
722 for_all_symbols(i, sym) {
723 sym_calc_value(sym);
724 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
725 continue;
726 switch (sym->type) {
727 case S_BOOLEAN:
728 case S_TRISTATE:
729 switch (sym_get_tristate_value(sym)) {
730 case no:
731 break;
732 case mod:
733 fprintf(out, "CONFIG_%s=m\n", sym->name);
734 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
735 break;
736 case yes:
737 fprintf(out, "CONFIG_%s=y\n", sym->name);
738 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
739 break;
740 }
741 break;
742 case S_STRING:
743 str = sym_get_string_value(sym);
744 fprintf(out, "CONFIG_%s=\"", sym->name);
745 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
746 while (1) {
747 l = strcspn(str, "\"\\");
748 if (l) {
749 fwrite(str, l, 1, out);
750 fwrite(str, l, 1, out_h);
751 str += l;
752 }
753 if (!*str)
754 break;
755 fprintf(out, "\\%c", *str);
756 fprintf(out_h, "\\%c", *str);
757 str++;
758 }
759 fputs("\"\n", out);
760 fputs("\"\n", out_h);
761 break;
762 case S_HEX:
763 str = sym_get_string_value(sym);
764 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
765 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
766 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
767 break;
768 }
769 case S_INT:
770 str = sym_get_string_value(sym);
771 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
772 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
773 break;
774 default:
775 break;
776 }
777 }
778 fclose(out);
779 fclose(out_h);
780
781 name = getenv("KCONFIG_AUTOHEADER");
782 if (!name)
783 name = "include/linux/autoconf.h";
784 UNLINK_IF_NECESSARY(name);
785 if (rename(".tmpconfig.h", name))
786 return 1;
787 name = getenv("KCONFIG_AUTOCONFIG");
788 if (!name)
789 name = "include/config/auto.conf";
790
791
792
793
794 UNLINK_IF_NECESSARY(name);
795 if (rename(".tmpconfig", name))
796 return 1;
797
798 return 0;
799}
800
801static int sym_change_count;
802static void (*conf_changed_callback)(void);
803
804void sym_set_change_count(int count)
805{
806 int _sym_change_count = sym_change_count;
807 sym_change_count = count;
808 if (conf_changed_callback &&
809 (bool)_sym_change_count != (bool)count)
810 conf_changed_callback();
811}
812
813void sym_add_change_count(int count)
814{
815 sym_set_change_count(count + sym_change_count);
816}
817
818bool conf_get_changed(void)
819{
820 return sym_change_count;
821}
822
823void conf_set_changed_callback(void (*fn)(void))
824{
825 conf_changed_callback = fn;
826}
827
