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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
4 */
5
6#include <sys/mman.h>
7#include <sys/stat.h>
8#include <sys/types.h>
9#include <ctype.h>
10#include <errno.h>
11#include <fcntl.h>
12#include <limits.h>
13#include <stdarg.h>
14#include <stdio.h>
15#include <stdlib.h>
16#include <string.h>
17#include <time.h>
18#include <unistd.h>
19
20#include "lkc.h"
21
22/* return true if 'path' exists, false otherwise */
23static bool is_present(const char *path)
24{
25 struct stat st;
26
27 return !stat(path, &st);
28}
29
30/* return true if 'path' exists and it is a directory, false otherwise */
31static bool is_dir(const char *path)
32{
33 struct stat st;
34
35 if (stat(path, &st))
36 return false;
37
38 return S_ISDIR(st.st_mode);
39}
40
41/* return true if the given two files are the same, false otherwise */
42static bool is_same(const char *file1, const char *file2)
43{
44 int fd1, fd2;
45 struct stat st1, st2;
46 void *map1, *map2;
47 bool ret = false;
48
49 fd1 = open(file1, O_RDONLY);
50 if (fd1 < 0)
51 return ret;
52
53 fd2 = open(file2, O_RDONLY);
54 if (fd2 < 0)
55 goto close1;
56
57 ret = fstat(fd1, &st1);
58 if (ret)
59 goto close2;
60 ret = fstat(fd2, &st2);
61 if (ret)
62 goto close2;
63
64 if (st1.st_size != st2.st_size)
65 goto close2;
66
67 map1 = mmap(NULL, st1.st_size, PROT_READ, MAP_PRIVATE, fd1, 0);
68 if (map1 == MAP_FAILED)
69 goto close2;
70
71 map2 = mmap(NULL, st2.st_size, PROT_READ, MAP_PRIVATE, fd2, 0);
72 if (map2 == MAP_FAILED)
73 goto close2;
74
75 if (bcmp(map1, map2, st1.st_size))
76 goto close2;
77
78 ret = true;
79close2:
80 close(fd2);
81close1:
82 close(fd1);
83
84 return ret;
85}
86
87/*
88 * Create the parent directory of the given path.
89 *
90 * For example, if 'include/config/auto.conf' is given, create 'include/config'.
91 */
92static int make_parent_dir(const char *path)
93{
94 char tmp[PATH_MAX + 1];
95 char *p;
96
97 strncpy(tmp, path, sizeof(tmp));
98 tmp[sizeof(tmp) - 1] = 0;
99
100 /* Remove the base name. Just return if nothing is left */
101 p = strrchr(tmp, '/');
102 if (!p)
103 return 0;
104 *(p + 1) = 0;
105
106 /* Just in case it is an absolute path */
107 p = tmp;
108 while (*p == '/')
109 p++;
110
111 while ((p = strchr(p, '/'))) {
112 *p = 0;
113
114 /* skip if the directory exists */
115 if (!is_dir(tmp) && mkdir(tmp, 0755))
116 return -1;
117
118 *p = '/';
119 while (*p == '/')
120 p++;
121 }
122
123 return 0;
124}
125
126static char depfile_path[PATH_MAX];
127static size_t depfile_prefix_len;
128
129/* touch depfile for symbol 'name' */
130static int conf_touch_dep(const char *name)
131{
132 int fd, ret;
133 char *d;
134
135 /* check overflow: prefix + name + '\0' must fit in buffer. */
136 if (depfile_prefix_len + strlen(name) + 1 > sizeof(depfile_path))
137 return -1;
138
139 d = depfile_path + depfile_prefix_len;
140 strcpy(d, name);
141
142 /* Assume directory path already exists. */
143 fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
144 if (fd == -1) {
145 if (errno != ENOENT)
146 return -1;
147
148 ret = make_parent_dir(depfile_path);
149 if (ret)
150 return ret;
151
152 /* Try it again. */
153 fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
154 if (fd == -1)
155 return -1;
156 }
157 close(fd);
158
159 return 0;
160}
161
162struct conf_printer {
163 void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
164 void (*print_comment)(FILE *, const char *, void *);
165};
166
167static void conf_warning(const char *fmt, ...)
168 __attribute__ ((format (printf, 1, 2)));
169
170static void conf_message(const char *fmt, ...)
171 __attribute__ ((format (printf, 1, 2)));
172
173static const char *conf_filename;
174static int conf_lineno, conf_warnings;
175
176static void conf_warning(const char *fmt, ...)
177{
178 va_list ap;
179 va_start(ap, fmt);
180 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
181 vfprintf(stderr, fmt, ap);
182 fprintf(stderr, "\n");
183 va_end(ap);
184 conf_warnings++;
185}
186
187static void conf_default_message_callback(const char *s)
188{
189 printf("#\n# ");
190 printf("%s", s);
191 printf("\n#\n");
192}
193
194static void (*conf_message_callback)(const char *s) =
195 conf_default_message_callback;
196void conf_set_message_callback(void (*fn)(const char *s))
197{
198 conf_message_callback = fn;
199}
200
201static void conf_message(const char *fmt, ...)
202{
203 va_list ap;
204 char buf[4096];
205
206 if (!conf_message_callback)
207 return;
208
209 va_start(ap, fmt);
210
211 vsnprintf(buf, sizeof(buf), fmt, ap);
212 conf_message_callback(buf);
213 va_end(ap);
214}
215
216const char *conf_get_configname(void)
217{
218 char *name = getenv("KCONFIG_CONFIG");
219
220 return name ? name : ".config";
221}
222
223static const char *conf_get_autoconfig_name(void)
224{
225 char *name = getenv("KCONFIG_AUTOCONFIG");
226
227 return name ? name : "include/config/auto.conf";
228}
229
230static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
231{
232 char *p2;
233
234 switch (sym->type) {
235 case S_TRISTATE:
236 if (p[0] == 'm') {
237 sym->def[def].tri = mod;
238 sym->flags |= def_flags;
239 break;
240 }
241 /* fall through */
242 case S_BOOLEAN:
243 if (p[0] == 'y') {
244 sym->def[def].tri = yes;
245 sym->flags |= def_flags;
246 break;
247 }
248 if (p[0] == 'n') {
249 sym->def[def].tri = no;
250 sym->flags |= def_flags;
251 break;
252 }
253 if (def != S_DEF_AUTO)
254 conf_warning("symbol value '%s' invalid for %s",
255 p, sym->name);
256 return 1;
257 case S_STRING:
258 if (*p++ != '"')
259 break;
260 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
261 if (*p2 == '"') {
262 *p2 = 0;
263 break;
264 }
265 memmove(p2, p2 + 1, strlen(p2));
266 }
267 if (!p2) {
268 if (def != S_DEF_AUTO)
269 conf_warning("invalid string found");
270 return 1;
271 }
272 /* fall through */
273 case S_INT:
274 case S_HEX:
275 if (sym_string_valid(sym, p)) {
276 sym->def[def].val = xstrdup(p);
277 sym->flags |= def_flags;
278 } else {
279 if (def != S_DEF_AUTO)
280 conf_warning("symbol value '%s' invalid for %s",
281 p, sym->name);
282 return 1;
283 }
284 break;
285 default:
286 ;
287 }
288 return 0;
289}
290
291#define LINE_GROWTH 16
292static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
293{
294 char *nline;
295 size_t new_size = slen + 1;
296 if (new_size > *n) {
297 new_size += LINE_GROWTH - 1;
298 new_size *= 2;
299 nline = xrealloc(*lineptr, new_size);
300 if (!nline)
301 return -1;
302
303 *lineptr = nline;
304 *n = new_size;
305 }
306
307 (*lineptr)[slen] = c;
308
309 return 0;
310}
311
312static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
313{
314 char *line = *lineptr;
315 size_t slen = 0;
316
317 for (;;) {
318 int c = getc(stream);
319
320 switch (c) {
321 case '\n':
322 if (add_byte(c, &line, slen, n) < 0)
323 goto e_out;
324 slen++;
325 /* fall through */
326 case EOF:
327 if (add_byte('\0', &line, slen, n) < 0)
328 goto e_out;
329 *lineptr = line;
330 if (slen == 0)
331 return -1;
332 return slen;
333 default:
334 if (add_byte(c, &line, slen, n) < 0)
335 goto e_out;
336 slen++;
337 }
338 }
339
340e_out:
341 line[slen-1] = '\0';
342 *lineptr = line;
343 return -1;
344}
345
346int conf_read_simple(const char *name, int def)
347{
348 FILE *in = NULL;
349 char *line = NULL;
350 size_t line_asize = 0;
351 char *p, *p2;
352 struct symbol *sym;
353 int i, def_flags;
354
355 if (name) {
356 in = zconf_fopen(name);
357 } else {
358 char *env;
359
360 name = conf_get_configname();
361 in = zconf_fopen(name);
362 if (in)
363 goto load;
364 conf_set_changed(true);
365
366 env = getenv("KCONFIG_DEFCONFIG_LIST");
367 if (!env)
368 return 1;
369
370 while (1) {
371 bool is_last;
372
373 while (isspace(*env))
374 env++;
375
376 if (!*env)
377 break;
378
379 p = env;
380 while (*p && !isspace(*p))
381 p++;
382
383 is_last = (*p == '\0');
384
385 *p = '\0';
386
387 in = zconf_fopen(env);
388 if (in) {
389 conf_message("using defaults found in %s",
390 env);
391 goto load;
392 }
393
394 if (is_last)
395 break;
396
397 env = p + 1;
398 }
399 }
400 if (!in)
401 return 1;
402
403load:
404 conf_filename = name;
405 conf_lineno = 0;
406 conf_warnings = 0;
407
408 def_flags = SYMBOL_DEF << def;
409 for_all_symbols(i, sym) {
410 sym->flags |= SYMBOL_CHANGED;
411 sym->flags &= ~(def_flags|SYMBOL_VALID);
412 if (sym_is_choice(sym))
413 sym->flags |= def_flags;
414 switch (sym->type) {
415 case S_INT:
416 case S_HEX:
417 case S_STRING:
418 if (sym->def[def].val)
419 free(sym->def[def].val);
420 /* fall through */
421 default:
422 sym->def[def].val = NULL;
423 sym->def[def].tri = no;
424 }
425 }
426
427 while (compat_getline(&line, &line_asize, in) != -1) {
428 conf_lineno++;
429 sym = NULL;
430 if (line[0] == '#') {
431 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
432 continue;
433 p = strchr(line + 2 + strlen(CONFIG_), ' ');
434 if (!p)
435 continue;
436 *p++ = 0;
437 if (strncmp(p, "is not set", 10))
438 continue;
439 if (def == S_DEF_USER) {
440 sym = sym_find(line + 2 + strlen(CONFIG_));
441 if (!sym) {
442 conf_set_changed(true);
443 continue;
444 }
445 } else {
446 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
447 if (sym->type == S_UNKNOWN)
448 sym->type = S_BOOLEAN;
449 }
450 if (sym->flags & def_flags) {
451 conf_warning("override: reassigning to symbol %s", sym->name);
452 }
453 switch (sym->type) {
454 case S_BOOLEAN:
455 case S_TRISTATE:
456 sym->def[def].tri = no;
457 sym->flags |= def_flags;
458 break;
459 default:
460 ;
461 }
462 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
463 p = strchr(line + strlen(CONFIG_), '=');
464 if (!p)
465 continue;
466 *p++ = 0;
467 p2 = strchr(p, '\n');
468 if (p2) {
469 *p2-- = 0;
470 if (*p2 == '\r')
471 *p2 = 0;
472 }
473
474 sym = sym_find(line + strlen(CONFIG_));
475 if (!sym) {
476 if (def == S_DEF_AUTO)
477 /*
478 * Reading from include/config/auto.conf
479 * If CONFIG_FOO previously existed in
480 * auto.conf but it is missing now,
481 * include/config/FOO must be touched.
482 */
483 conf_touch_dep(line + strlen(CONFIG_));
484 else
485 conf_set_changed(true);
486 continue;
487 }
488
489 if (sym->flags & def_flags) {
490 conf_warning("override: reassigning to symbol %s", sym->name);
491 }
492 if (conf_set_sym_val(sym, def, def_flags, p))
493 continue;
494 } else {
495 if (line[0] != '\r' && line[0] != '\n')
496 conf_warning("unexpected data: %.*s",
497 (int)strcspn(line, "\r\n"), line);
498
499 continue;
500 }
501
502 if (sym && sym_is_choice_value(sym)) {
503 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
504 switch (sym->def[def].tri) {
505 case no:
506 break;
507 case mod:
508 if (cs->def[def].tri == yes) {
509 conf_warning("%s creates inconsistent choice state", sym->name);
510 cs->flags &= ~def_flags;
511 }
512 break;
513 case yes:
514 if (cs->def[def].tri != no)
515 conf_warning("override: %s changes choice state", sym->name);
516 cs->def[def].val = sym;
517 break;
518 }
519 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
520 }
521 }
522 free(line);
523 fclose(in);
524 return 0;
525}
526
527int conf_read(const char *name)
528{
529 struct symbol *sym;
530 int conf_unsaved = 0;
531 int i;
532
533 conf_set_changed(false);
534
535 if (conf_read_simple(name, S_DEF_USER)) {
536 sym_calc_value(modules_sym);
537 return 1;
538 }
539
540 sym_calc_value(modules_sym);
541
542 for_all_symbols(i, sym) {
543 sym_calc_value(sym);
544 if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
545 continue;
546 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
547 /* check that calculated value agrees with saved value */
548 switch (sym->type) {
549 case S_BOOLEAN:
550 case S_TRISTATE:
551 if (sym->def[S_DEF_USER].tri == sym_get_tristate_value(sym))
552 continue;
553 break;
554 default:
555 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
556 continue;
557 break;
558 }
559 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
560 /* no previous value and not saved */
561 continue;
562 conf_unsaved++;
563 /* maybe print value in verbose mode... */
564 }
565
566 for_all_symbols(i, sym) {
567 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
568 /* Reset values of generates values, so they'll appear
569 * as new, if they should become visible, but that
570 * doesn't quite work if the Kconfig and the saved
571 * configuration disagree.
572 */
573 if (sym->visible == no && !conf_unsaved)
574 sym->flags &= ~SYMBOL_DEF_USER;
575 switch (sym->type) {
576 case S_STRING:
577 case S_INT:
578 case S_HEX:
579 /* Reset a string value if it's out of range */
580 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
581 break;
582 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
583 conf_unsaved++;
584 break;
585 default:
586 break;
587 }
588 }
589 }
590
591 if (conf_warnings || conf_unsaved)
592 conf_set_changed(true);
593
594 return 0;
595}
596
597/*
598 * Kconfig configuration printer
599 *
600 * This printer is used when generating the resulting configuration after
601 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
602 * passing a non-NULL argument to the printer.
603 *
604 */
605static void
606kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
607{
608
609 switch (sym->type) {
610 case S_BOOLEAN:
611 case S_TRISTATE:
612 if (*value == 'n') {
613 bool skip_unset = (arg != NULL);
614
615 if (!skip_unset)
616 fprintf(fp, "# %s%s is not set\n",
617 CONFIG_, sym->name);
618 return;
619 }
620 break;
621 default:
622 break;
623 }
624
625 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
626}
627
628static void
629kconfig_print_comment(FILE *fp, const char *value, void *arg)
630{
631 const char *p = value;
632 size_t l;
633
634 for (;;) {
635 l = strcspn(p, "\n");
636 fprintf(fp, "#");
637 if (l) {
638 fprintf(fp, " ");
639 xfwrite(p, l, 1, fp);
640 p += l;
641 }
642 fprintf(fp, "\n");
643 if (*p++ == '\0')
644 break;
645 }
646}
647
648static struct conf_printer kconfig_printer_cb =
649{
650 .print_symbol = kconfig_print_symbol,
651 .print_comment = kconfig_print_comment,
652};
653
654/*
655 * Header printer
656 *
657 * This printer is used when generating the `include/generated/autoconf.h' file.
658 */
659static void
660header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
661{
662
663 switch (sym->type) {
664 case S_BOOLEAN:
665 case S_TRISTATE: {
666 const char *suffix = "";
667
668 switch (*value) {
669 case 'n':
670 break;
671 case 'm':
672 suffix = "_MODULE";
673 /* fall through */
674 default:
675 fprintf(fp, "#define %s%s%s 1\n",
676 CONFIG_, sym->name, suffix);
677 }
678 break;
679 }
680 case S_HEX: {
681 const char *prefix = "";
682
683 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
684 prefix = "0x";
685 fprintf(fp, "#define %s%s %s%s\n",
686 CONFIG_, sym->name, prefix, value);
687 break;
688 }
689 case S_STRING:
690 case S_INT:
691 fprintf(fp, "#define %s%s %s\n",
692 CONFIG_, sym->name, value);
693 break;
694 default:
695 break;
696 }
697
698}
699
700static void
701header_print_comment(FILE *fp, const char *value, void *arg)
702{
703 const char *p = value;
704 size_t l;
705
706 fprintf(fp, "/*\n");
707 for (;;) {
708 l = strcspn(p, "\n");
709 fprintf(fp, " *");
710 if (l) {
711 fprintf(fp, " ");
712 xfwrite(p, l, 1, fp);
713 p += l;
714 }
715 fprintf(fp, "\n");
716 if (*p++ == '\0')
717 break;
718 }
719 fprintf(fp, " */\n");
720}
721
722static struct conf_printer header_printer_cb =
723{
724 .print_symbol = header_print_symbol,
725 .print_comment = header_print_comment,
726};
727
728static void conf_write_symbol(FILE *fp, struct symbol *sym,
729 struct conf_printer *printer, void *printer_arg)
730{
731 const char *str;
732
733 switch (sym->type) {
734 case S_UNKNOWN:
735 break;
736 case S_STRING:
737 str = sym_get_string_value(sym);
738 str = sym_escape_string_value(str);
739 printer->print_symbol(fp, sym, str, printer_arg);
740 free((void *)str);
741 break;
742 default:
743 str = sym_get_string_value(sym);
744 printer->print_symbol(fp, sym, str, printer_arg);
745 }
746}
747
748static void
749conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
750{
751 char buf[256];
752
753 snprintf(buf, sizeof(buf),
754 "\n"
755 "Automatically generated file; DO NOT EDIT.\n"
756 "%s\n",
757 rootmenu.prompt->text);
758
759 printer->print_comment(fp, buf, printer_arg);
760}
761
762/*
763 * Write out a minimal config.
764 * All values that has default values are skipped as this is redundant.
765 */
766int conf_write_defconfig(const char *filename)
767{
768 struct symbol *sym;
769 struct menu *menu;
770 FILE *out;
771
772 out = fopen(filename, "w");
773 if (!out)
774 return 1;
775
776 sym_clear_all_valid();
777
778 /* Traverse all menus to find all relevant symbols */
779 menu = rootmenu.list;
780
781 while (menu != NULL)
782 {
783 sym = menu->sym;
784 if (sym == NULL) {
785 if (!menu_is_visible(menu))
786 goto next_menu;
787 } else if (!sym_is_choice(sym)) {
788 sym_calc_value(sym);
789 if (!(sym->flags & SYMBOL_WRITE))
790 goto next_menu;
791 sym->flags &= ~SYMBOL_WRITE;
792 /* If we cannot change the symbol - skip */
793 if (!sym_is_changeable(sym))
794 goto next_menu;
795 /* If symbol equals to default value - skip */
796 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
797 goto next_menu;
798
799 /*
800 * If symbol is a choice value and equals to the
801 * default for a choice - skip.
802 * But only if value is bool and equal to "y" and
803 * choice is not "optional".
804 * (If choice is "optional" then all values can be "n")
805 */
806 if (sym_is_choice_value(sym)) {
807 struct symbol *cs;
808 struct symbol *ds;
809
810 cs = prop_get_symbol(sym_get_choice_prop(sym));
811 ds = sym_choice_default(cs);
812 if (!sym_is_optional(cs) && sym == ds) {
813 if ((sym->type == S_BOOLEAN) &&
814 sym_get_tristate_value(sym) == yes)
815 goto next_menu;
816 }
817 }
818 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
819 }
820next_menu:
821 if (menu->list != NULL) {
822 menu = menu->list;
823 }
824 else if (menu->next != NULL) {
825 menu = menu->next;
826 } else {
827 while ((menu = menu->parent)) {
828 if (menu->next != NULL) {
829 menu = menu->next;
830 break;
831 }
832 }
833 }
834 }
835 fclose(out);
836 return 0;
837}
838
839int conf_write(const char *name)
840{
841 FILE *out;
842 struct symbol *sym;
843 struct menu *menu;
844 const char *str;
845 char tmpname[PATH_MAX + 1], oldname[PATH_MAX + 1];
846 char *env;
847 int i;
848 bool need_newline = false;
849
850 if (!name)
851 name = conf_get_configname();
852
853 if (!*name) {
854 fprintf(stderr, "config name is empty\n");
855 return -1;
856 }
857
858 if (is_dir(name)) {
859 fprintf(stderr, "%s: Is a directory\n", name);
860 return -1;
861 }
862
863 if (make_parent_dir(name))
864 return -1;
865
866 env = getenv("KCONFIG_OVERWRITECONFIG");
867 if (env && *env) {
868 *tmpname = 0;
869 out = fopen(name, "w");
870 } else {
871 snprintf(tmpname, sizeof(tmpname), "%s.%d.tmp",
872 name, (int)getpid());
873 out = fopen(tmpname, "w");
874 }
875 if (!out)
876 return 1;
877
878 conf_write_heading(out, &kconfig_printer_cb, NULL);
879
880 if (!conf_get_changed())
881 sym_clear_all_valid();
882
883 menu = rootmenu.list;
884 while (menu) {
885 sym = menu->sym;
886 if (!sym) {
887 if (!menu_is_visible(menu))
888 goto next;
889 str = menu_get_prompt(menu);
890 fprintf(out, "\n"
891 "#\n"
892 "# %s\n"
893 "#\n", str);
894 need_newline = false;
895 } else if (!(sym->flags & SYMBOL_CHOICE) &&
896 !(sym->flags & SYMBOL_WRITTEN)) {
897 sym_calc_value(sym);
898 if (!(sym->flags & SYMBOL_WRITE))
899 goto next;
900 if (need_newline) {
901 fprintf(out, "\n");
902 need_newline = false;
903 }
904 sym->flags |= SYMBOL_WRITTEN;
905 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
906 }
907
908next:
909 if (menu->list) {
910 menu = menu->list;
911 continue;
912 }
913 if (menu->next)
914 menu = menu->next;
915 else while ((menu = menu->parent)) {
916 if (!menu->sym && menu_is_visible(menu) &&
917 menu != &rootmenu) {
918 str = menu_get_prompt(menu);
919 fprintf(out, "# end of %s\n", str);
920 need_newline = true;
921 }
922 if (menu->next) {
923 menu = menu->next;
924 break;
925 }
926 }
927 }
928 fclose(out);
929
930 for_all_symbols(i, sym)
931 sym->flags &= ~SYMBOL_WRITTEN;
932
933 if (*tmpname) {
934 if (is_same(name, tmpname)) {
935 conf_message("No change to %s", name);
936 unlink(tmpname);
937 conf_set_changed(false);
938 return 0;
939 }
940
941 snprintf(oldname, sizeof(oldname), "%s.old", name);
942 rename(name, oldname);
943 if (rename(tmpname, name))
944 return 1;
945 }
946
947 conf_message("configuration written to %s", name);
948
949 conf_set_changed(false);
950
951 return 0;
952}
953
954/* write a dependency file as used by kbuild to track dependencies */
955static int conf_write_dep(const char *name)
956{
957 struct file *file;
958 FILE *out;
959
960 out = fopen("..config.tmp", "w");
961 if (!out)
962 return 1;
963 fprintf(out, "deps_config := \\\n");
964 for (file = file_list; file; file = file->next) {
965 if (file->next)
966 fprintf(out, "\t%s \\\n", file->name);
967 else
968 fprintf(out, "\t%s\n", file->name);
969 }
970 fprintf(out, "\n%s: \\\n"
971 "\t$(deps_config)\n\n", conf_get_autoconfig_name());
972
973 env_write_dep(out, conf_get_autoconfig_name());
974
975 fprintf(out, "\n$(deps_config): ;\n");
976 fclose(out);
977
978 if (make_parent_dir(name))
979 return 1;
980 rename("..config.tmp", name);
981 return 0;
982}
983
984static int conf_touch_deps(void)
985{
986 const char *name;
987 struct symbol *sym;
988 int res, i;
989
990 strcpy(depfile_path, "include/config/");
991 depfile_prefix_len = strlen(depfile_path);
992
993 name = conf_get_autoconfig_name();
994 conf_read_simple(name, S_DEF_AUTO);
995 sym_calc_value(modules_sym);
996
997 for_all_symbols(i, sym) {
998 sym_calc_value(sym);
999 if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name)
1000 continue;
1001 if (sym->flags & SYMBOL_WRITE) {
1002 if (sym->flags & SYMBOL_DEF_AUTO) {
1003 /*
1004 * symbol has old and new value,
1005 * so compare them...
1006 */
1007 switch (sym->type) {
1008 case S_BOOLEAN:
1009 case S_TRISTATE:
1010 if (sym_get_tristate_value(sym) ==
1011 sym->def[S_DEF_AUTO].tri)
1012 continue;
1013 break;
1014 case S_STRING:
1015 case S_HEX:
1016 case S_INT:
1017 if (!strcmp(sym_get_string_value(sym),
1018 sym->def[S_DEF_AUTO].val))
1019 continue;
1020 break;
1021 default:
1022 break;
1023 }
1024 } else {
1025 /*
1026 * If there is no old value, only 'no' (unset)
1027 * is allowed as new value.
1028 */
1029 switch (sym->type) {
1030 case S_BOOLEAN:
1031 case S_TRISTATE:
1032 if (sym_get_tristate_value(sym) == no)
1033 continue;
1034 break;
1035 default:
1036 break;
1037 }
1038 }
1039 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
1040 /* There is neither an old nor a new value. */
1041 continue;
1042 /* else
1043 * There is an old value, but no new value ('no' (unset)
1044 * isn't saved in auto.conf, so the old value is always
1045 * different from 'no').
1046 */
1047
1048 res = conf_touch_dep(sym->name);
1049 if (res)
1050 return res;
1051 }
1052
1053 return 0;
1054}
1055
1056int conf_write_autoconf(int overwrite)
1057{
1058 struct symbol *sym;
1059 const char *name;
1060 const char *autoconf_name = conf_get_autoconfig_name();
1061 FILE *out, *out_h;
1062 int i;
1063
1064 if (!overwrite && is_present(autoconf_name))
1065 return 0;
1066
1067 conf_write_dep("include/config/auto.conf.cmd");
1068
1069 if (conf_touch_deps())
1070 return 1;
1071
1072 out = fopen(".tmpconfig", "w");
1073 if (!out)
1074 return 1;
1075
1076 out_h = fopen(".tmpconfig.h", "w");
1077 if (!out_h) {
1078 fclose(out);
1079 return 1;
1080 }
1081
1082 conf_write_heading(out, &kconfig_printer_cb, NULL);
1083 conf_write_heading(out_h, &header_printer_cb, NULL);
1084
1085 for_all_symbols(i, sym) {
1086 sym_calc_value(sym);
1087 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1088 continue;
1089
1090 /* write symbols to auto.conf and autoconf.h */
1091 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1092 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1093 }
1094 fclose(out);
1095 fclose(out_h);
1096
1097 name = getenv("KCONFIG_AUTOHEADER");
1098 if (!name)
1099 name = "include/generated/autoconf.h";
1100 if (make_parent_dir(name))
1101 return 1;
1102 if (rename(".tmpconfig.h", name))
1103 return 1;
1104
1105 if (make_parent_dir(autoconf_name))
1106 return 1;
1107 /*
1108 * This must be the last step, kbuild has a dependency on auto.conf
1109 * and this marks the successful completion of the previous steps.
1110 */
1111 if (rename(".tmpconfig", autoconf_name))
1112 return 1;
1113
1114 return 0;
1115}
1116
1117static bool conf_changed;
1118static void (*conf_changed_callback)(void);
1119
1120void conf_set_changed(bool val)
1121{
1122 if (conf_changed_callback && conf_changed != val)
1123 conf_changed_callback();
1124
1125 conf_changed = val;
1126}
1127
1128bool conf_get_changed(void)
1129{
1130 return conf_changed;
1131}
1132
1133void conf_set_changed_callback(void (*fn)(void))
1134{
1135 conf_changed_callback = fn;
1136}
1137
1138void set_all_choice_values(struct symbol *csym)
1139{
1140 struct property *prop;
1141 struct symbol *sym;
1142 struct expr *e;
1143
1144 prop = sym_get_choice_prop(csym);
1145
1146 /*
1147 * Set all non-assinged choice values to no
1148 */
1149 expr_list_for_each_sym(prop->expr, e, sym) {
1150 if (!sym_has_value(sym))
1151 sym->def[S_DEF_USER].tri = no;
1152 }
1153 csym->flags |= SYMBOL_DEF_USER;
1154 /* clear VALID to get value calculated */
1155 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1156}
1/*
2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
4 */
5
6#include <sys/stat.h>
7#include <ctype.h>
8#include <errno.h>
9#include <fcntl.h>
10#include <stdarg.h>
11#include <stdio.h>
12#include <stdlib.h>
13#include <string.h>
14#include <time.h>
15#include <unistd.h>
16
17#include "lkc.h"
18
19static void conf_warning(const char *fmt, ...)
20 __attribute__ ((format (printf, 1, 2)));
21
22static void conf_message(const char *fmt, ...)
23 __attribute__ ((format (printf, 1, 2)));
24
25static const char *conf_filename;
26static int conf_lineno, conf_warnings, conf_unsaved;
27
28const char conf_defname[] = "arch/$ARCH/defconfig";
29
30static void conf_warning(const char *fmt, ...)
31{
32 va_list ap;
33 va_start(ap, fmt);
34 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
35 vfprintf(stderr, fmt, ap);
36 fprintf(stderr, "\n");
37 va_end(ap);
38 conf_warnings++;
39}
40
41static void conf_default_message_callback(const char *fmt, va_list ap)
42{
43 printf("#\n# ");
44 vprintf(fmt, ap);
45 printf("\n#\n");
46}
47
48static void (*conf_message_callback) (const char *fmt, va_list ap) =
49 conf_default_message_callback;
50void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
51{
52 conf_message_callback = fn;
53}
54
55static void conf_message(const char *fmt, ...)
56{
57 va_list ap;
58
59 va_start(ap, fmt);
60 if (conf_message_callback)
61 conf_message_callback(fmt, ap);
62}
63
64const char *conf_get_configname(void)
65{
66 char *name = getenv("KCONFIG_CONFIG");
67
68 return name ? name : ".config";
69}
70
71const char *conf_get_autoconfig_name(void)
72{
73 char *name = getenv("KCONFIG_AUTOCONFIG");
74
75 return name ? name : "include/config/auto.conf";
76}
77
78static char *conf_expand_value(const char *in)
79{
80 struct symbol *sym;
81 const char *src;
82 static char res_value[SYMBOL_MAXLENGTH];
83 char *dst, name[SYMBOL_MAXLENGTH];
84
85 res_value[0] = 0;
86 dst = name;
87 while ((src = strchr(in, '$'))) {
88 strncat(res_value, in, src - in);
89 src++;
90 dst = name;
91 while (isalnum(*src) || *src == '_')
92 *dst++ = *src++;
93 *dst = 0;
94 sym = sym_lookup(name, 0);
95 sym_calc_value(sym);
96 strcat(res_value, sym_get_string_value(sym));
97 in = src;
98 }
99 strcat(res_value, in);
100
101 return res_value;
102}
103
104char *conf_get_default_confname(void)
105{
106 struct stat buf;
107 static char fullname[PATH_MAX+1];
108 char *env, *name;
109
110 name = conf_expand_value(conf_defname);
111 env = getenv(SRCTREE);
112 if (env) {
113 sprintf(fullname, "%s/%s", env, name);
114 if (!stat(fullname, &buf))
115 return fullname;
116 }
117 return name;
118}
119
120static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
121{
122 char *p2;
123
124 switch (sym->type) {
125 case S_TRISTATE:
126 if (p[0] == 'm') {
127 sym->def[def].tri = mod;
128 sym->flags |= def_flags;
129 break;
130 }
131 /* fall through */
132 case S_BOOLEAN:
133 if (p[0] == 'y') {
134 sym->def[def].tri = yes;
135 sym->flags |= def_flags;
136 break;
137 }
138 if (p[0] == 'n') {
139 sym->def[def].tri = no;
140 sym->flags |= def_flags;
141 break;
142 }
143 if (def != S_DEF_AUTO)
144 conf_warning("symbol value '%s' invalid for %s",
145 p, sym->name);
146 return 1;
147 case S_OTHER:
148 if (*p != '"') {
149 for (p2 = p; *p2 && !isspace(*p2); p2++)
150 ;
151 sym->type = S_STRING;
152 goto done;
153 }
154 /* fall through */
155 case S_STRING:
156 if (*p++ != '"')
157 break;
158 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
159 if (*p2 == '"') {
160 *p2 = 0;
161 break;
162 }
163 memmove(p2, p2 + 1, strlen(p2));
164 }
165 if (!p2) {
166 if (def != S_DEF_AUTO)
167 conf_warning("invalid string found");
168 return 1;
169 }
170 /* fall through */
171 case S_INT:
172 case S_HEX:
173 done:
174 if (sym_string_valid(sym, p)) {
175 sym->def[def].val = strdup(p);
176 sym->flags |= def_flags;
177 } else {
178 if (def != S_DEF_AUTO)
179 conf_warning("symbol value '%s' invalid for %s",
180 p, sym->name);
181 return 1;
182 }
183 break;
184 default:
185 ;
186 }
187 return 0;
188}
189
190#define LINE_GROWTH 16
191static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
192{
193 char *nline;
194 size_t new_size = slen + 1;
195 if (new_size > *n) {
196 new_size += LINE_GROWTH - 1;
197 new_size *= 2;
198 nline = realloc(*lineptr, new_size);
199 if (!nline)
200 return -1;
201
202 *lineptr = nline;
203 *n = new_size;
204 }
205
206 (*lineptr)[slen] = c;
207
208 return 0;
209}
210
211static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
212{
213 char *line = *lineptr;
214 size_t slen = 0;
215
216 for (;;) {
217 int c = getc(stream);
218
219 switch (c) {
220 case '\n':
221 if (add_byte(c, &line, slen, n) < 0)
222 goto e_out;
223 slen++;
224 /* fall through */
225 case EOF:
226 if (add_byte('\0', &line, slen, n) < 0)
227 goto e_out;
228 *lineptr = line;
229 if (slen == 0)
230 return -1;
231 return slen;
232 default:
233 if (add_byte(c, &line, slen, n) < 0)
234 goto e_out;
235 slen++;
236 }
237 }
238
239e_out:
240 line[slen-1] = '\0';
241 *lineptr = line;
242 return -1;
243}
244
245int conf_read_simple(const char *name, int def)
246{
247 FILE *in = NULL;
248 char *line = NULL;
249 size_t line_asize = 0;
250 char *p, *p2;
251 struct symbol *sym;
252 int i, def_flags;
253
254 if (name) {
255 in = zconf_fopen(name);
256 } else {
257 struct property *prop;
258
259 name = conf_get_configname();
260 in = zconf_fopen(name);
261 if (in)
262 goto load;
263 sym_add_change_count(1);
264 if (!sym_defconfig_list) {
265 if (modules_sym)
266 sym_calc_value(modules_sym);
267 return 1;
268 }
269
270 for_all_defaults(sym_defconfig_list, prop) {
271 if (expr_calc_value(prop->visible.expr) == no ||
272 prop->expr->type != E_SYMBOL)
273 continue;
274 name = conf_expand_value(prop->expr->left.sym->name);
275 in = zconf_fopen(name);
276 if (in) {
277 conf_message(_("using defaults found in %s"),
278 name);
279 goto load;
280 }
281 }
282 }
283 if (!in)
284 return 1;
285
286load:
287 conf_filename = name;
288 conf_lineno = 0;
289 conf_warnings = 0;
290 conf_unsaved = 0;
291
292 def_flags = SYMBOL_DEF << def;
293 for_all_symbols(i, sym) {
294 sym->flags |= SYMBOL_CHANGED;
295 sym->flags &= ~(def_flags|SYMBOL_VALID);
296 if (sym_is_choice(sym))
297 sym->flags |= def_flags;
298 switch (sym->type) {
299 case S_INT:
300 case S_HEX:
301 case S_STRING:
302 if (sym->def[def].val)
303 free(sym->def[def].val);
304 /* fall through */
305 default:
306 sym->def[def].val = NULL;
307 sym->def[def].tri = no;
308 }
309 }
310
311 while (compat_getline(&line, &line_asize, in) != -1) {
312 conf_lineno++;
313 sym = NULL;
314 if (line[0] == '#') {
315 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
316 continue;
317 p = strchr(line + 2 + strlen(CONFIG_), ' ');
318 if (!p)
319 continue;
320 *p++ = 0;
321 if (strncmp(p, "is not set", 10))
322 continue;
323 if (def == S_DEF_USER) {
324 sym = sym_find(line + 2 + strlen(CONFIG_));
325 if (!sym) {
326 sym_add_change_count(1);
327 goto setsym;
328 }
329 } else {
330 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
331 if (sym->type == S_UNKNOWN)
332 sym->type = S_BOOLEAN;
333 }
334 if (sym->flags & def_flags) {
335 conf_warning("override: reassigning to symbol %s", sym->name);
336 }
337 switch (sym->type) {
338 case S_BOOLEAN:
339 case S_TRISTATE:
340 sym->def[def].tri = no;
341 sym->flags |= def_flags;
342 break;
343 default:
344 ;
345 }
346 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
347 p = strchr(line + strlen(CONFIG_), '=');
348 if (!p)
349 continue;
350 *p++ = 0;
351 p2 = strchr(p, '\n');
352 if (p2) {
353 *p2-- = 0;
354 if (*p2 == '\r')
355 *p2 = 0;
356 }
357 if (def == S_DEF_USER) {
358 sym = sym_find(line + strlen(CONFIG_));
359 if (!sym) {
360 sym_add_change_count(1);
361 goto setsym;
362 }
363 } else {
364 sym = sym_lookup(line + strlen(CONFIG_), 0);
365 if (sym->type == S_UNKNOWN)
366 sym->type = S_OTHER;
367 }
368 if (sym->flags & def_flags) {
369 conf_warning("override: reassigning to symbol %s", sym->name);
370 }
371 if (conf_set_sym_val(sym, def, def_flags, p))
372 continue;
373 } else {
374 if (line[0] != '\r' && line[0] != '\n')
375 conf_warning("unexpected data");
376 continue;
377 }
378setsym:
379 if (sym && sym_is_choice_value(sym)) {
380 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
381 switch (sym->def[def].tri) {
382 case no:
383 break;
384 case mod:
385 if (cs->def[def].tri == yes) {
386 conf_warning("%s creates inconsistent choice state", sym->name);
387 cs->flags &= ~def_flags;
388 }
389 break;
390 case yes:
391 if (cs->def[def].tri != no)
392 conf_warning("override: %s changes choice state", sym->name);
393 cs->def[def].val = sym;
394 break;
395 }
396 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
397 }
398 }
399 free(line);
400 fclose(in);
401
402 if (modules_sym)
403 sym_calc_value(modules_sym);
404 return 0;
405}
406
407int conf_read(const char *name)
408{
409 struct symbol *sym;
410 int i;
411
412 sym_set_change_count(0);
413
414 if (conf_read_simple(name, S_DEF_USER))
415 return 1;
416
417 for_all_symbols(i, sym) {
418 sym_calc_value(sym);
419 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
420 continue;
421 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
422 /* check that calculated value agrees with saved value */
423 switch (sym->type) {
424 case S_BOOLEAN:
425 case S_TRISTATE:
426 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
427 break;
428 if (!sym_is_choice(sym))
429 continue;
430 /* fall through */
431 default:
432 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
433 continue;
434 break;
435 }
436 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
437 /* no previous value and not saved */
438 continue;
439 conf_unsaved++;
440 /* maybe print value in verbose mode... */
441 }
442
443 for_all_symbols(i, sym) {
444 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
445 /* Reset values of generates values, so they'll appear
446 * as new, if they should become visible, but that
447 * doesn't quite work if the Kconfig and the saved
448 * configuration disagree.
449 */
450 if (sym->visible == no && !conf_unsaved)
451 sym->flags &= ~SYMBOL_DEF_USER;
452 switch (sym->type) {
453 case S_STRING:
454 case S_INT:
455 case S_HEX:
456 /* Reset a string value if it's out of range */
457 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
458 break;
459 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
460 conf_unsaved++;
461 break;
462 default:
463 break;
464 }
465 }
466 }
467
468 sym_add_change_count(conf_warnings || conf_unsaved);
469
470 return 0;
471}
472
473/*
474 * Kconfig configuration printer
475 *
476 * This printer is used when generating the resulting configuration after
477 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
478 * passing a non-NULL argument to the printer.
479 *
480 */
481static void
482kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
483{
484
485 switch (sym->type) {
486 case S_BOOLEAN:
487 case S_TRISTATE:
488 if (*value == 'n') {
489 bool skip_unset = (arg != NULL);
490
491 if (!skip_unset)
492 fprintf(fp, "# %s%s is not set\n",
493 CONFIG_, sym->name);
494 return;
495 }
496 break;
497 default:
498 break;
499 }
500
501 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
502}
503
504static void
505kconfig_print_comment(FILE *fp, const char *value, void *arg)
506{
507 const char *p = value;
508 size_t l;
509
510 for (;;) {
511 l = strcspn(p, "\n");
512 fprintf(fp, "#");
513 if (l) {
514 fprintf(fp, " ");
515 xfwrite(p, l, 1, fp);
516 p += l;
517 }
518 fprintf(fp, "\n");
519 if (*p++ == '\0')
520 break;
521 }
522}
523
524static struct conf_printer kconfig_printer_cb =
525{
526 .print_symbol = kconfig_print_symbol,
527 .print_comment = kconfig_print_comment,
528};
529
530/*
531 * Header printer
532 *
533 * This printer is used when generating the `include/generated/autoconf.h' file.
534 */
535static void
536header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
537{
538
539 switch (sym->type) {
540 case S_BOOLEAN:
541 case S_TRISTATE: {
542 const char *suffix = "";
543
544 switch (*value) {
545 case 'n':
546 break;
547 case 'm':
548 suffix = "_MODULE";
549 /* fall through */
550 default:
551 fprintf(fp, "#define %s%s%s 1\n",
552 CONFIG_, sym->name, suffix);
553 }
554 break;
555 }
556 case S_HEX: {
557 const char *prefix = "";
558
559 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
560 prefix = "0x";
561 fprintf(fp, "#define %s%s %s%s\n",
562 CONFIG_, sym->name, prefix, value);
563 break;
564 }
565 case S_STRING:
566 case S_INT:
567 fprintf(fp, "#define %s%s %s\n",
568 CONFIG_, sym->name, value);
569 break;
570 default:
571 break;
572 }
573
574}
575
576static void
577header_print_comment(FILE *fp, const char *value, void *arg)
578{
579 const char *p = value;
580 size_t l;
581
582 fprintf(fp, "/*\n");
583 for (;;) {
584 l = strcspn(p, "\n");
585 fprintf(fp, " *");
586 if (l) {
587 fprintf(fp, " ");
588 xfwrite(p, l, 1, fp);
589 p += l;
590 }
591 fprintf(fp, "\n");
592 if (*p++ == '\0')
593 break;
594 }
595 fprintf(fp, " */\n");
596}
597
598static struct conf_printer header_printer_cb =
599{
600 .print_symbol = header_print_symbol,
601 .print_comment = header_print_comment,
602};
603
604/*
605 * Tristate printer
606 *
607 * This printer is used when generating the `include/config/tristate.conf' file.
608 */
609static void
610tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
611{
612
613 if (sym->type == S_TRISTATE && *value != 'n')
614 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
615}
616
617static struct conf_printer tristate_printer_cb =
618{
619 .print_symbol = tristate_print_symbol,
620 .print_comment = kconfig_print_comment,
621};
622
623static void conf_write_symbol(FILE *fp, struct symbol *sym,
624 struct conf_printer *printer, void *printer_arg)
625{
626 const char *str;
627
628 switch (sym->type) {
629 case S_OTHER:
630 case S_UNKNOWN:
631 break;
632 case S_STRING:
633 str = sym_get_string_value(sym);
634 str = sym_escape_string_value(str);
635 printer->print_symbol(fp, sym, str, printer_arg);
636 free((void *)str);
637 break;
638 default:
639 str = sym_get_string_value(sym);
640 printer->print_symbol(fp, sym, str, printer_arg);
641 }
642}
643
644static void
645conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
646{
647 char buf[256];
648
649 snprintf(buf, sizeof(buf),
650 "\n"
651 "Automatically generated file; DO NOT EDIT.\n"
652 "%s\n",
653 rootmenu.prompt->text);
654
655 printer->print_comment(fp, buf, printer_arg);
656}
657
658/*
659 * Write out a minimal config.
660 * All values that has default values are skipped as this is redundant.
661 */
662int conf_write_defconfig(const char *filename)
663{
664 struct symbol *sym;
665 struct menu *menu;
666 FILE *out;
667
668 out = fopen(filename, "w");
669 if (!out)
670 return 1;
671
672 sym_clear_all_valid();
673
674 /* Traverse all menus to find all relevant symbols */
675 menu = rootmenu.list;
676
677 while (menu != NULL)
678 {
679 sym = menu->sym;
680 if (sym == NULL) {
681 if (!menu_is_visible(menu))
682 goto next_menu;
683 } else if (!sym_is_choice(sym)) {
684 sym_calc_value(sym);
685 if (!(sym->flags & SYMBOL_WRITE))
686 goto next_menu;
687 sym->flags &= ~SYMBOL_WRITE;
688 /* If we cannot change the symbol - skip */
689 if (!sym_is_changable(sym))
690 goto next_menu;
691 /* If symbol equals to default value - skip */
692 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
693 goto next_menu;
694
695 /*
696 * If symbol is a choice value and equals to the
697 * default for a choice - skip.
698 * But only if value is bool and equal to "y" and
699 * choice is not "optional".
700 * (If choice is "optional" then all values can be "n")
701 */
702 if (sym_is_choice_value(sym)) {
703 struct symbol *cs;
704 struct symbol *ds;
705
706 cs = prop_get_symbol(sym_get_choice_prop(sym));
707 ds = sym_choice_default(cs);
708 if (!sym_is_optional(cs) && sym == ds) {
709 if ((sym->type == S_BOOLEAN) &&
710 sym_get_tristate_value(sym) == yes)
711 goto next_menu;
712 }
713 }
714 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
715 }
716next_menu:
717 if (menu->list != NULL) {
718 menu = menu->list;
719 }
720 else if (menu->next != NULL) {
721 menu = menu->next;
722 } else {
723 while ((menu = menu->parent)) {
724 if (menu->next != NULL) {
725 menu = menu->next;
726 break;
727 }
728 }
729 }
730 }
731 fclose(out);
732 return 0;
733}
734
735int conf_write(const char *name)
736{
737 FILE *out;
738 struct symbol *sym;
739 struct menu *menu;
740 const char *basename;
741 const char *str;
742 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
743 char *env;
744
745 dirname[0] = 0;
746 if (name && name[0]) {
747 struct stat st;
748 char *slash;
749
750 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
751 strcpy(dirname, name);
752 strcat(dirname, "/");
753 basename = conf_get_configname();
754 } else if ((slash = strrchr(name, '/'))) {
755 int size = slash - name + 1;
756 memcpy(dirname, name, size);
757 dirname[size] = 0;
758 if (slash[1])
759 basename = slash + 1;
760 else
761 basename = conf_get_configname();
762 } else
763 basename = name;
764 } else
765 basename = conf_get_configname();
766
767 sprintf(newname, "%s%s", dirname, basename);
768 env = getenv("KCONFIG_OVERWRITECONFIG");
769 if (!env || !*env) {
770 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
771 out = fopen(tmpname, "w");
772 } else {
773 *tmpname = 0;
774 out = fopen(newname, "w");
775 }
776 if (!out)
777 return 1;
778
779 conf_write_heading(out, &kconfig_printer_cb, NULL);
780
781 if (!conf_get_changed())
782 sym_clear_all_valid();
783
784 menu = rootmenu.list;
785 while (menu) {
786 sym = menu->sym;
787 if (!sym) {
788 if (!menu_is_visible(menu))
789 goto next;
790 str = menu_get_prompt(menu);
791 fprintf(out, "\n"
792 "#\n"
793 "# %s\n"
794 "#\n", str);
795 } else if (!(sym->flags & SYMBOL_CHOICE)) {
796 sym_calc_value(sym);
797 if (!(sym->flags & SYMBOL_WRITE))
798 goto next;
799 sym->flags &= ~SYMBOL_WRITE;
800
801 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
802 }
803
804next:
805 if (menu->list) {
806 menu = menu->list;
807 continue;
808 }
809 if (menu->next)
810 menu = menu->next;
811 else while ((menu = menu->parent)) {
812 if (menu->next) {
813 menu = menu->next;
814 break;
815 }
816 }
817 }
818 fclose(out);
819
820 if (*tmpname) {
821 strcat(dirname, basename);
822 strcat(dirname, ".old");
823 rename(newname, dirname);
824 if (rename(tmpname, newname))
825 return 1;
826 }
827
828 conf_message(_("configuration written to %s"), newname);
829
830 sym_set_change_count(0);
831
832 return 0;
833}
834
835static int conf_split_config(void)
836{
837 const char *name;
838 char path[PATH_MAX+1];
839 char *s, *d, c;
840 struct symbol *sym;
841 struct stat sb;
842 int res, i, fd;
843
844 name = conf_get_autoconfig_name();
845 conf_read_simple(name, S_DEF_AUTO);
846
847 if (chdir("include/config"))
848 return 1;
849
850 res = 0;
851 for_all_symbols(i, sym) {
852 sym_calc_value(sym);
853 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
854 continue;
855 if (sym->flags & SYMBOL_WRITE) {
856 if (sym->flags & SYMBOL_DEF_AUTO) {
857 /*
858 * symbol has old and new value,
859 * so compare them...
860 */
861 switch (sym->type) {
862 case S_BOOLEAN:
863 case S_TRISTATE:
864 if (sym_get_tristate_value(sym) ==
865 sym->def[S_DEF_AUTO].tri)
866 continue;
867 break;
868 case S_STRING:
869 case S_HEX:
870 case S_INT:
871 if (!strcmp(sym_get_string_value(sym),
872 sym->def[S_DEF_AUTO].val))
873 continue;
874 break;
875 default:
876 break;
877 }
878 } else {
879 /*
880 * If there is no old value, only 'no' (unset)
881 * is allowed as new value.
882 */
883 switch (sym->type) {
884 case S_BOOLEAN:
885 case S_TRISTATE:
886 if (sym_get_tristate_value(sym) == no)
887 continue;
888 break;
889 default:
890 break;
891 }
892 }
893 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
894 /* There is neither an old nor a new value. */
895 continue;
896 /* else
897 * There is an old value, but no new value ('no' (unset)
898 * isn't saved in auto.conf, so the old value is always
899 * different from 'no').
900 */
901
902 /* Replace all '_' and append ".h" */
903 s = sym->name;
904 d = path;
905 while ((c = *s++)) {
906 c = tolower(c);
907 *d++ = (c == '_') ? '/' : c;
908 }
909 strcpy(d, ".h");
910
911 /* Assume directory path already exists. */
912 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
913 if (fd == -1) {
914 if (errno != ENOENT) {
915 res = 1;
916 break;
917 }
918 /*
919 * Create directory components,
920 * unless they exist already.
921 */
922 d = path;
923 while ((d = strchr(d, '/'))) {
924 *d = 0;
925 if (stat(path, &sb) && mkdir(path, 0755)) {
926 res = 1;
927 goto out;
928 }
929 *d++ = '/';
930 }
931 /* Try it again. */
932 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
933 if (fd == -1) {
934 res = 1;
935 break;
936 }
937 }
938 close(fd);
939 }
940out:
941 if (chdir("../.."))
942 return 1;
943
944 return res;
945}
946
947int conf_write_autoconf(void)
948{
949 struct symbol *sym;
950 const char *name;
951 FILE *out, *tristate, *out_h;
952 int i;
953
954 sym_clear_all_valid();
955
956 file_write_dep("include/config/auto.conf.cmd");
957
958 if (conf_split_config())
959 return 1;
960
961 out = fopen(".tmpconfig", "w");
962 if (!out)
963 return 1;
964
965 tristate = fopen(".tmpconfig_tristate", "w");
966 if (!tristate) {
967 fclose(out);
968 return 1;
969 }
970
971 out_h = fopen(".tmpconfig.h", "w");
972 if (!out_h) {
973 fclose(out);
974 fclose(tristate);
975 return 1;
976 }
977
978 conf_write_heading(out, &kconfig_printer_cb, NULL);
979
980 conf_write_heading(tristate, &tristate_printer_cb, NULL);
981
982 conf_write_heading(out_h, &header_printer_cb, NULL);
983
984 for_all_symbols(i, sym) {
985 sym_calc_value(sym);
986 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
987 continue;
988
989 /* write symbol to auto.conf, tristate and header files */
990 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
991
992 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
993
994 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
995 }
996 fclose(out);
997 fclose(tristate);
998 fclose(out_h);
999
1000 name = getenv("KCONFIG_AUTOHEADER");
1001 if (!name)
1002 name = "include/generated/autoconf.h";
1003 if (rename(".tmpconfig.h", name))
1004 return 1;
1005 name = getenv("KCONFIG_TRISTATE");
1006 if (!name)
1007 name = "include/config/tristate.conf";
1008 if (rename(".tmpconfig_tristate", name))
1009 return 1;
1010 name = conf_get_autoconfig_name();
1011 /*
1012 * This must be the last step, kbuild has a dependency on auto.conf
1013 * and this marks the successful completion of the previous steps.
1014 */
1015 if (rename(".tmpconfig", name))
1016 return 1;
1017
1018 return 0;
1019}
1020
1021static int sym_change_count;
1022static void (*conf_changed_callback)(void);
1023
1024void sym_set_change_count(int count)
1025{
1026 int _sym_change_count = sym_change_count;
1027 sym_change_count = count;
1028 if (conf_changed_callback &&
1029 (bool)_sym_change_count != (bool)count)
1030 conf_changed_callback();
1031}
1032
1033void sym_add_change_count(int count)
1034{
1035 sym_set_change_count(count + sym_change_count);
1036}
1037
1038bool conf_get_changed(void)
1039{
1040 return sym_change_count;
1041}
1042
1043void conf_set_changed_callback(void (*fn)(void))
1044{
1045 conf_changed_callback = fn;
1046}
1047
1048static bool randomize_choice_values(struct symbol *csym)
1049{
1050 struct property *prop;
1051 struct symbol *sym;
1052 struct expr *e;
1053 int cnt, def;
1054
1055 /*
1056 * If choice is mod then we may have more items selected
1057 * and if no then no-one.
1058 * In both cases stop.
1059 */
1060 if (csym->curr.tri != yes)
1061 return false;
1062
1063 prop = sym_get_choice_prop(csym);
1064
1065 /* count entries in choice block */
1066 cnt = 0;
1067 expr_list_for_each_sym(prop->expr, e, sym)
1068 cnt++;
1069
1070 /*
1071 * find a random value and set it to yes,
1072 * set the rest to no so we have only one set
1073 */
1074 def = (rand() % cnt);
1075
1076 cnt = 0;
1077 expr_list_for_each_sym(prop->expr, e, sym) {
1078 if (def == cnt++) {
1079 sym->def[S_DEF_USER].tri = yes;
1080 csym->def[S_DEF_USER].val = sym;
1081 }
1082 else {
1083 sym->def[S_DEF_USER].tri = no;
1084 }
1085 sym->flags |= SYMBOL_DEF_USER;
1086 /* clear VALID to get value calculated */
1087 sym->flags &= ~SYMBOL_VALID;
1088 }
1089 csym->flags |= SYMBOL_DEF_USER;
1090 /* clear VALID to get value calculated */
1091 csym->flags &= ~(SYMBOL_VALID);
1092
1093 return true;
1094}
1095
1096void set_all_choice_values(struct symbol *csym)
1097{
1098 struct property *prop;
1099 struct symbol *sym;
1100 struct expr *e;
1101
1102 prop = sym_get_choice_prop(csym);
1103
1104 /*
1105 * Set all non-assinged choice values to no
1106 */
1107 expr_list_for_each_sym(prop->expr, e, sym) {
1108 if (!sym_has_value(sym))
1109 sym->def[S_DEF_USER].tri = no;
1110 }
1111 csym->flags |= SYMBOL_DEF_USER;
1112 /* clear VALID to get value calculated */
1113 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1114}
1115
1116bool conf_set_all_new_symbols(enum conf_def_mode mode)
1117{
1118 struct symbol *sym, *csym;
1119 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y
1120 * pty: probability of tristate = y
1121 * ptm: probability of tristate = m
1122 */
1123
1124 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1125 * below, otherwise gcc whines about
1126 * -Wmaybe-uninitialized */
1127 if (mode == def_random) {
1128 int n, p[3];
1129 char *env = getenv("KCONFIG_PROBABILITY");
1130 n = 0;
1131 while( env && *env ) {
1132 char *endp;
1133 int tmp = strtol( env, &endp, 10 );
1134 if( tmp >= 0 && tmp <= 100 ) {
1135 p[n++] = tmp;
1136 } else {
1137 errno = ERANGE;
1138 perror( "KCONFIG_PROBABILITY" );
1139 exit( 1 );
1140 }
1141 env = (*endp == ':') ? endp+1 : endp;
1142 if( n >=3 ) {
1143 break;
1144 }
1145 }
1146 switch( n ) {
1147 case 1:
1148 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1149 break;
1150 case 2:
1151 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1152 break;
1153 case 3:
1154 pby = p[0]; pty = p[1]; ptm = p[2];
1155 break;
1156 }
1157
1158 if( pty+ptm > 100 ) {
1159 errno = ERANGE;
1160 perror( "KCONFIG_PROBABILITY" );
1161 exit( 1 );
1162 }
1163 }
1164 bool has_changed = false;
1165
1166 for_all_symbols(i, sym) {
1167 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1168 continue;
1169 switch (sym_get_type(sym)) {
1170 case S_BOOLEAN:
1171 case S_TRISTATE:
1172 has_changed = true;
1173 switch (mode) {
1174 case def_yes:
1175 sym->def[S_DEF_USER].tri = yes;
1176 break;
1177 case def_mod:
1178 sym->def[S_DEF_USER].tri = mod;
1179 break;
1180 case def_no:
1181 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1182 sym->def[S_DEF_USER].tri = yes;
1183 else
1184 sym->def[S_DEF_USER].tri = no;
1185 break;
1186 case def_random:
1187 sym->def[S_DEF_USER].tri = no;
1188 cnt = rand() % 100;
1189 if (sym->type == S_TRISTATE) {
1190 if (cnt < pty)
1191 sym->def[S_DEF_USER].tri = yes;
1192 else if (cnt < (pty+ptm))
1193 sym->def[S_DEF_USER].tri = mod;
1194 } else if (cnt < pby)
1195 sym->def[S_DEF_USER].tri = yes;
1196 break;
1197 default:
1198 continue;
1199 }
1200 if (!(sym_is_choice(sym) && mode == def_random))
1201 sym->flags |= SYMBOL_DEF_USER;
1202 break;
1203 default:
1204 break;
1205 }
1206
1207 }
1208
1209 sym_clear_all_valid();
1210
1211 /*
1212 * We have different type of choice blocks.
1213 * If curr.tri equals to mod then we can select several
1214 * choice symbols in one block.
1215 * In this case we do nothing.
1216 * If curr.tri equals yes then only one symbol can be
1217 * selected in a choice block and we set it to yes,
1218 * and the rest to no.
1219 */
1220 if (mode != def_random) {
1221 for_all_symbols(i, csym) {
1222 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1223 sym_is_choice_value(csym))
1224 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1225 }
1226 }
1227
1228 for_all_symbols(i, csym) {
1229 if (sym_has_value(csym) || !sym_is_choice(csym))
1230 continue;
1231
1232 sym_calc_value(csym);
1233 if (mode == def_random)
1234 has_changed = randomize_choice_values(csym);
1235 else {
1236 set_all_choice_values(csym);
1237 has_changed = true;
1238 }
1239 }
1240
1241 return has_changed;
1242}