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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 <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/* return true if 'path' exists, false otherwise */
22static bool is_present(const char *path)
23{
24 struct stat st;
25
26 return !stat(path, &st);
27}
28
29/* return true if 'path' exists and it is a directory, false otherwise */
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/* return true if the given two files are the same, false otherwise */
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 * Create the parent directory of the given path.
88 *
89 * For example, if 'include/config/auto.conf' is given, create 'include/config'.
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 /* Remove the base name. Just return if nothing is left */
100 p = strrchr(tmp, '/');
101 if (!p)
102 return 0;
103 *(p + 1) = 0;
104
105 /* Just in case it is an absolute path */
106 p = tmp;
107 while (*p == '/')
108 p++;
109
110 while ((p = strchr(p, '/'))) {
111 *p = 0;
112
113 /* skip if the directory exists */
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/* touch depfile for symbol 'name' */
129static int conf_touch_dep(const char *name)
130{
131 int fd, ret;
132 const char *s;
133 char *d, c;
134
135 /* check overflow: prefix + name + ".h" + '\0' must fit in buffer. */
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 /* Assume directory path already exists. */
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 /* Try it again. */
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
180static void conf_warning(const char *fmt, ...)
181{
182 va_list ap;
183 va_start(ap, fmt);
184 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
185 vfprintf(stderr, fmt, ap);
186 fprintf(stderr, "\n");
187 va_end(ap);
188 conf_warnings++;
189}
190
191static void conf_default_message_callback(const char *s)
192{
193 printf("#\n# ");
194 printf("%s", s);
195 printf("\n#\n");
196}
197
198static void (*conf_message_callback)(const char *s) =
199 conf_default_message_callback;
200void conf_set_message_callback(void (*fn)(const char *s))
201{
202 conf_message_callback = fn;
203}
204
205static void conf_message(const char *fmt, ...)
206{
207 va_list ap;
208 char buf[4096];
209
210 if (!conf_message_callback)
211 return;
212
213 va_start(ap, fmt);
214
215 vsnprintf(buf, sizeof(buf), fmt, ap);
216 conf_message_callback(buf);
217 va_end(ap);
218}
219
220const char *conf_get_configname(void)
221{
222 char *name = getenv("KCONFIG_CONFIG");
223
224 return name ? name : ".config";
225}
226
227static const char *conf_get_autoconfig_name(void)
228{
229 char *name = getenv("KCONFIG_AUTOCONFIG");
230
231 return name ? name : "include/config/auto.conf";
232}
233
234static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
235{
236 char *p2;
237
238 switch (sym->type) {
239 case S_TRISTATE:
240 if (p[0] == 'm') {
241 sym->def[def].tri = mod;
242 sym->flags |= def_flags;
243 break;
244 }
245 /* fall through */
246 case S_BOOLEAN:
247 if (p[0] == 'y') {
248 sym->def[def].tri = yes;
249 sym->flags |= def_flags;
250 break;
251 }
252 if (p[0] == 'n') {
253 sym->def[def].tri = no;
254 sym->flags |= def_flags;
255 break;
256 }
257 if (def != S_DEF_AUTO)
258 conf_warning("symbol value '%s' invalid for %s",
259 p, sym->name);
260 return 1;
261 case S_STRING:
262 if (*p++ != '"')
263 break;
264 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
265 if (*p2 == '"') {
266 *p2 = 0;
267 break;
268 }
269 memmove(p2, p2 + 1, strlen(p2));
270 }
271 if (!p2) {
272 if (def != S_DEF_AUTO)
273 conf_warning("invalid string found");
274 return 1;
275 }
276 /* fall through */
277 case S_INT:
278 case S_HEX:
279 if (sym_string_valid(sym, p)) {
280 sym->def[def].val = xstrdup(p);
281 sym->flags |= def_flags;
282 } else {
283 if (def != S_DEF_AUTO)
284 conf_warning("symbol value '%s' invalid for %s",
285 p, sym->name);
286 return 1;
287 }
288 break;
289 default:
290 ;
291 }
292 return 0;
293}
294
295#define LINE_GROWTH 16
296static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
297{
298 char *nline;
299 size_t new_size = slen + 1;
300 if (new_size > *n) {
301 new_size += LINE_GROWTH - 1;
302 new_size *= 2;
303 nline = xrealloc(*lineptr, new_size);
304 if (!nline)
305 return -1;
306
307 *lineptr = nline;
308 *n = new_size;
309 }
310
311 (*lineptr)[slen] = c;
312
313 return 0;
314}
315
316static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
317{
318 char *line = *lineptr;
319 size_t slen = 0;
320
321 for (;;) {
322 int c = getc(stream);
323
324 switch (c) {
325 case '\n':
326 if (add_byte(c, &line, slen, n) < 0)
327 goto e_out;
328 slen++;
329 /* fall through */
330 case EOF:
331 if (add_byte('\0', &line, slen, n) < 0)
332 goto e_out;
333 *lineptr = line;
334 if (slen == 0)
335 return -1;
336 return slen;
337 default:
338 if (add_byte(c, &line, slen, n) < 0)
339 goto e_out;
340 slen++;
341 }
342 }
343
344e_out:
345 line[slen-1] = '\0';
346 *lineptr = line;
347 return -1;
348}
349
350int conf_read_simple(const char *name, int def)
351{
352 FILE *in = NULL;
353 char *line = NULL;
354 size_t line_asize = 0;
355 char *p, *p2;
356 struct symbol *sym;
357 int i, def_flags;
358
359 if (name) {
360 in = zconf_fopen(name);
361 } else {
362 struct property *prop;
363
364 name = conf_get_configname();
365 in = zconf_fopen(name);
366 if (in)
367 goto load;
368 sym_add_change_count(1);
369 if (!sym_defconfig_list)
370 return 1;
371
372 for_all_defaults(sym_defconfig_list, prop) {
373 if (expr_calc_value(prop->visible.expr) == no ||
374 prop->expr->type != E_SYMBOL)
375 continue;
376 sym_calc_value(prop->expr->left.sym);
377 name = sym_get_string_value(prop->expr->left.sym);
378 in = zconf_fopen(name);
379 if (in) {
380 conf_message("using defaults found in %s",
381 name);
382 goto load;
383 }
384 }
385 }
386 if (!in)
387 return 1;
388
389load:
390 conf_filename = name;
391 conf_lineno = 0;
392 conf_warnings = 0;
393
394 def_flags = SYMBOL_DEF << def;
395 for_all_symbols(i, sym) {
396 sym->flags |= SYMBOL_CHANGED;
397 sym->flags &= ~(def_flags|SYMBOL_VALID);
398 if (sym_is_choice(sym))
399 sym->flags |= def_flags;
400 switch (sym->type) {
401 case S_INT:
402 case S_HEX:
403 case S_STRING:
404 if (sym->def[def].val)
405 free(sym->def[def].val);
406 /* fall through */
407 default:
408 sym->def[def].val = NULL;
409 sym->def[def].tri = no;
410 }
411 }
412
413 while (compat_getline(&line, &line_asize, in) != -1) {
414 conf_lineno++;
415 sym = NULL;
416 if (line[0] == '#') {
417 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
418 continue;
419 p = strchr(line + 2 + strlen(CONFIG_), ' ');
420 if (!p)
421 continue;
422 *p++ = 0;
423 if (strncmp(p, "is not set", 10))
424 continue;
425 if (def == S_DEF_USER) {
426 sym = sym_find(line + 2 + strlen(CONFIG_));
427 if (!sym) {
428 sym_add_change_count(1);
429 continue;
430 }
431 } else {
432 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
433 if (sym->type == S_UNKNOWN)
434 sym->type = S_BOOLEAN;
435 }
436 if (sym->flags & def_flags) {
437 conf_warning("override: reassigning to symbol %s", sym->name);
438 }
439 switch (sym->type) {
440 case S_BOOLEAN:
441 case S_TRISTATE:
442 sym->def[def].tri = no;
443 sym->flags |= def_flags;
444 break;
445 default:
446 ;
447 }
448 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
449 p = strchr(line + strlen(CONFIG_), '=');
450 if (!p)
451 continue;
452 *p++ = 0;
453 p2 = strchr(p, '\n');
454 if (p2) {
455 *p2-- = 0;
456 if (*p2 == '\r')
457 *p2 = 0;
458 }
459
460 sym = sym_find(line + strlen(CONFIG_));
461 if (!sym) {
462 if (def == S_DEF_AUTO)
463 /*
464 * Reading from include/config/auto.conf
465 * If CONFIG_FOO previously existed in
466 * auto.conf but it is missing now,
467 * include/config/foo.h must be touched.
468 */
469 conf_touch_dep(line + strlen(CONFIG_));
470 else
471 sym_add_change_count(1);
472 continue;
473 }
474
475 if (sym->flags & def_flags) {
476 conf_warning("override: reassigning to symbol %s", sym->name);
477 }
478 if (conf_set_sym_val(sym, def, def_flags, p))
479 continue;
480 } else {
481 if (line[0] != '\r' && line[0] != '\n')
482 conf_warning("unexpected data: %.*s",
483 (int)strcspn(line, "\r\n"), line);
484
485 continue;
486 }
487
488 if (sym && sym_is_choice_value(sym)) {
489 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
490 switch (sym->def[def].tri) {
491 case no:
492 break;
493 case mod:
494 if (cs->def[def].tri == yes) {
495 conf_warning("%s creates inconsistent choice state", sym->name);
496 cs->flags &= ~def_flags;
497 }
498 break;
499 case yes:
500 if (cs->def[def].tri != no)
501 conf_warning("override: %s changes choice state", sym->name);
502 cs->def[def].val = sym;
503 break;
504 }
505 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
506 }
507 }
508 free(line);
509 fclose(in);
510 return 0;
511}
512
513int conf_read(const char *name)
514{
515 struct symbol *sym;
516 int conf_unsaved = 0;
517 int i;
518
519 sym_set_change_count(0);
520
521 if (conf_read_simple(name, S_DEF_USER)) {
522 sym_calc_value(modules_sym);
523 return 1;
524 }
525
526 sym_calc_value(modules_sym);
527
528 for_all_symbols(i, sym) {
529 sym_calc_value(sym);
530 if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
531 continue;
532 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
533 /* check that calculated value agrees with saved value */
534 switch (sym->type) {
535 case S_BOOLEAN:
536 case S_TRISTATE:
537 if (sym->def[S_DEF_USER].tri == sym_get_tristate_value(sym))
538 continue;
539 break;
540 default:
541 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
542 continue;
543 break;
544 }
545 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
546 /* no previous value and not saved */
547 continue;
548 conf_unsaved++;
549 /* maybe print value in verbose mode... */
550 }
551
552 for_all_symbols(i, sym) {
553 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
554 /* Reset values of generates values, so they'll appear
555 * as new, if they should become visible, but that
556 * doesn't quite work if the Kconfig and the saved
557 * configuration disagree.
558 */
559 if (sym->visible == no && !conf_unsaved)
560 sym->flags &= ~SYMBOL_DEF_USER;
561 switch (sym->type) {
562 case S_STRING:
563 case S_INT:
564 case S_HEX:
565 /* Reset a string value if it's out of range */
566 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
567 break;
568 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
569 conf_unsaved++;
570 break;
571 default:
572 break;
573 }
574 }
575 }
576
577 sym_add_change_count(conf_warnings || conf_unsaved);
578
579 return 0;
580}
581
582/*
583 * Kconfig configuration printer
584 *
585 * This printer is used when generating the resulting configuration after
586 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
587 * passing a non-NULL argument to the printer.
588 *
589 */
590static void
591kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
592{
593
594 switch (sym->type) {
595 case S_BOOLEAN:
596 case S_TRISTATE:
597 if (*value == 'n') {
598 bool skip_unset = (arg != NULL);
599
600 if (!skip_unset)
601 fprintf(fp, "# %s%s is not set\n",
602 CONFIG_, sym->name);
603 return;
604 }
605 break;
606 default:
607 break;
608 }
609
610 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
611}
612
613static void
614kconfig_print_comment(FILE *fp, const char *value, void *arg)
615{
616 const char *p = value;
617 size_t l;
618
619 for (;;) {
620 l = strcspn(p, "\n");
621 fprintf(fp, "#");
622 if (l) {
623 fprintf(fp, " ");
624 xfwrite(p, l, 1, fp);
625 p += l;
626 }
627 fprintf(fp, "\n");
628 if (*p++ == '\0')
629 break;
630 }
631}
632
633static struct conf_printer kconfig_printer_cb =
634{
635 .print_symbol = kconfig_print_symbol,
636 .print_comment = kconfig_print_comment,
637};
638
639/*
640 * Header printer
641 *
642 * This printer is used when generating the `include/generated/autoconf.h' file.
643 */
644static void
645header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
646{
647
648 switch (sym->type) {
649 case S_BOOLEAN:
650 case S_TRISTATE: {
651 const char *suffix = "";
652
653 switch (*value) {
654 case 'n':
655 break;
656 case 'm':
657 suffix = "_MODULE";
658 /* fall through */
659 default:
660 fprintf(fp, "#define %s%s%s 1\n",
661 CONFIG_, sym->name, suffix);
662 }
663 break;
664 }
665 case S_HEX: {
666 const char *prefix = "";
667
668 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
669 prefix = "0x";
670 fprintf(fp, "#define %s%s %s%s\n",
671 CONFIG_, sym->name, prefix, value);
672 break;
673 }
674 case S_STRING:
675 case S_INT:
676 fprintf(fp, "#define %s%s %s\n",
677 CONFIG_, sym->name, value);
678 break;
679 default:
680 break;
681 }
682
683}
684
685static void
686header_print_comment(FILE *fp, const char *value, void *arg)
687{
688 const char *p = value;
689 size_t l;
690
691 fprintf(fp, "/*\n");
692 for (;;) {
693 l = strcspn(p, "\n");
694 fprintf(fp, " *");
695 if (l) {
696 fprintf(fp, " ");
697 xfwrite(p, l, 1, fp);
698 p += l;
699 }
700 fprintf(fp, "\n");
701 if (*p++ == '\0')
702 break;
703 }
704 fprintf(fp, " */\n");
705}
706
707static struct conf_printer header_printer_cb =
708{
709 .print_symbol = header_print_symbol,
710 .print_comment = header_print_comment,
711};
712
713static void conf_write_symbol(FILE *fp, struct symbol *sym,
714 struct conf_printer *printer, void *printer_arg)
715{
716 const char *str;
717
718 switch (sym->type) {
719 case S_UNKNOWN:
720 break;
721 case S_STRING:
722 str = sym_get_string_value(sym);
723 str = sym_escape_string_value(str);
724 printer->print_symbol(fp, sym, str, printer_arg);
725 free((void *)str);
726 break;
727 default:
728 str = sym_get_string_value(sym);
729 printer->print_symbol(fp, sym, str, printer_arg);
730 }
731}
732
733static void
734conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
735{
736 char buf[256];
737
738 snprintf(buf, sizeof(buf),
739 "\n"
740 "Automatically generated file; DO NOT EDIT.\n"
741 "%s\n",
742 rootmenu.prompt->text);
743
744 printer->print_comment(fp, buf, printer_arg);
745}
746
747/*
748 * Write out a minimal config.
749 * All values that has default values are skipped as this is redundant.
750 */
751int conf_write_defconfig(const char *filename)
752{
753 struct symbol *sym;
754 struct menu *menu;
755 FILE *out;
756
757 out = fopen(filename, "w");
758 if (!out)
759 return 1;
760
761 sym_clear_all_valid();
762
763 /* Traverse all menus to find all relevant symbols */
764 menu = rootmenu.list;
765
766 while (menu != NULL)
767 {
768 sym = menu->sym;
769 if (sym == NULL) {
770 if (!menu_is_visible(menu))
771 goto next_menu;
772 } else if (!sym_is_choice(sym)) {
773 sym_calc_value(sym);
774 if (!(sym->flags & SYMBOL_WRITE))
775 goto next_menu;
776 sym->flags &= ~SYMBOL_WRITE;
777 /* If we cannot change the symbol - skip */
778 if (!sym_is_changeable(sym))
779 goto next_menu;
780 /* If symbol equals to default value - skip */
781 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
782 goto next_menu;
783
784 /*
785 * If symbol is a choice value and equals to the
786 * default for a choice - skip.
787 * But only if value is bool and equal to "y" and
788 * choice is not "optional".
789 * (If choice is "optional" then all values can be "n")
790 */
791 if (sym_is_choice_value(sym)) {
792 struct symbol *cs;
793 struct symbol *ds;
794
795 cs = prop_get_symbol(sym_get_choice_prop(sym));
796 ds = sym_choice_default(cs);
797 if (!sym_is_optional(cs) && sym == ds) {
798 if ((sym->type == S_BOOLEAN) &&
799 sym_get_tristate_value(sym) == yes)
800 goto next_menu;
801 }
802 }
803 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
804 }
805next_menu:
806 if (menu->list != NULL) {
807 menu = menu->list;
808 }
809 else if (menu->next != NULL) {
810 menu = menu->next;
811 } else {
812 while ((menu = menu->parent)) {
813 if (menu->next != NULL) {
814 menu = menu->next;
815 break;
816 }
817 }
818 }
819 }
820 fclose(out);
821 return 0;
822}
823
824int conf_write(const char *name)
825{
826 FILE *out;
827 struct symbol *sym;
828 struct menu *menu;
829 const char *str;
830 char tmpname[PATH_MAX + 1], oldname[PATH_MAX + 1];
831 char *env;
832 int i;
833 bool need_newline = false;
834
835 if (!name)
836 name = conf_get_configname();
837
838 if (!*name) {
839 fprintf(stderr, "config name is empty\n");
840 return -1;
841 }
842
843 if (is_dir(name)) {
844 fprintf(stderr, "%s: Is a directory\n", name);
845 return -1;
846 }
847
848 if (make_parent_dir(name))
849 return -1;
850
851 env = getenv("KCONFIG_OVERWRITECONFIG");
852 if (env && *env) {
853 *tmpname = 0;
854 out = fopen(name, "w");
855 } else {
856 snprintf(tmpname, sizeof(tmpname), "%s.%d.tmp",
857 name, (int)getpid());
858 out = fopen(tmpname, "w");
859 }
860 if (!out)
861 return 1;
862
863 conf_write_heading(out, &kconfig_printer_cb, NULL);
864
865 if (!conf_get_changed())
866 sym_clear_all_valid();
867
868 menu = rootmenu.list;
869 while (menu) {
870 sym = menu->sym;
871 if (!sym) {
872 if (!menu_is_visible(menu))
873 goto next;
874 str = menu_get_prompt(menu);
875 fprintf(out, "\n"
876 "#\n"
877 "# %s\n"
878 "#\n", str);
879 need_newline = false;
880 } else if (!(sym->flags & SYMBOL_CHOICE) &&
881 !(sym->flags & SYMBOL_WRITTEN)) {
882 sym_calc_value(sym);
883 if (!(sym->flags & SYMBOL_WRITE))
884 goto next;
885 if (need_newline) {
886 fprintf(out, "\n");
887 need_newline = false;
888 }
889 sym->flags |= SYMBOL_WRITTEN;
890 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
891 }
892
893next:
894 if (menu->list) {
895 menu = menu->list;
896 continue;
897 }
898 if (menu->next)
899 menu = menu->next;
900 else while ((menu = menu->parent)) {
901 if (!menu->sym && menu_is_visible(menu) &&
902 menu != &rootmenu) {
903 str = menu_get_prompt(menu);
904 fprintf(out, "# end of %s\n", str);
905 need_newline = true;
906 }
907 if (menu->next) {
908 menu = menu->next;
909 break;
910 }
911 }
912 }
913 fclose(out);
914
915 for_all_symbols(i, sym)
916 sym->flags &= ~SYMBOL_WRITTEN;
917
918 if (*tmpname) {
919 if (is_same(name, tmpname)) {
920 conf_message("No change to %s", name);
921 unlink(tmpname);
922 sym_set_change_count(0);
923 return 0;
924 }
925
926 snprintf(oldname, sizeof(oldname), "%s.old", name);
927 rename(name, oldname);
928 if (rename(tmpname, name))
929 return 1;
930 }
931
932 conf_message("configuration written to %s", name);
933
934 sym_set_change_count(0);
935
936 return 0;
937}
938
939/* write a dependency file as used by kbuild to track dependencies */
940static int conf_write_dep(const char *name)
941{
942 struct file *file;
943 FILE *out;
944
945 out = fopen("..config.tmp", "w");
946 if (!out)
947 return 1;
948 fprintf(out, "deps_config := \\\n");
949 for (file = file_list; file; file = file->next) {
950 if (file->next)
951 fprintf(out, "\t%s \\\n", file->name);
952 else
953 fprintf(out, "\t%s\n", file->name);
954 }
955 fprintf(out, "\n%s: \\\n"
956 "\t$(deps_config)\n\n", conf_get_autoconfig_name());
957
958 env_write_dep(out, conf_get_autoconfig_name());
959
960 fprintf(out, "\n$(deps_config): ;\n");
961 fclose(out);
962
963 if (make_parent_dir(name))
964 return 1;
965 rename("..config.tmp", name);
966 return 0;
967}
968
969static int conf_touch_deps(void)
970{
971 const char *name;
972 struct symbol *sym;
973 int res, i;
974
975 strcpy(depfile_path, "include/config/");
976 depfile_prefix_len = strlen(depfile_path);
977
978 name = conf_get_autoconfig_name();
979 conf_read_simple(name, S_DEF_AUTO);
980 sym_calc_value(modules_sym);
981
982 for_all_symbols(i, sym) {
983 sym_calc_value(sym);
984 if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name)
985 continue;
986 if (sym->flags & SYMBOL_WRITE) {
987 if (sym->flags & SYMBOL_DEF_AUTO) {
988 /*
989 * symbol has old and new value,
990 * so compare them...
991 */
992 switch (sym->type) {
993 case S_BOOLEAN:
994 case S_TRISTATE:
995 if (sym_get_tristate_value(sym) ==
996 sym->def[S_DEF_AUTO].tri)
997 continue;
998 break;
999 case S_STRING:
1000 case S_HEX:
1001 case S_INT:
1002 if (!strcmp(sym_get_string_value(sym),
1003 sym->def[S_DEF_AUTO].val))
1004 continue;
1005 break;
1006 default:
1007 break;
1008 }
1009 } else {
1010 /*
1011 * If there is no old value, only 'no' (unset)
1012 * is allowed as new value.
1013 */
1014 switch (sym->type) {
1015 case S_BOOLEAN:
1016 case S_TRISTATE:
1017 if (sym_get_tristate_value(sym) == no)
1018 continue;
1019 break;
1020 default:
1021 break;
1022 }
1023 }
1024 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
1025 /* There is neither an old nor a new value. */
1026 continue;
1027 /* else
1028 * There is an old value, but no new value ('no' (unset)
1029 * isn't saved in auto.conf, so the old value is always
1030 * different from 'no').
1031 */
1032
1033 res = conf_touch_dep(sym->name);
1034 if (res)
1035 return res;
1036 }
1037
1038 return 0;
1039}
1040
1041int conf_write_autoconf(int overwrite)
1042{
1043 struct symbol *sym;
1044 const char *name;
1045 const char *autoconf_name = conf_get_autoconfig_name();
1046 FILE *out, *out_h;
1047 int i;
1048
1049 if (!overwrite && is_present(autoconf_name))
1050 return 0;
1051
1052 conf_write_dep("include/config/auto.conf.cmd");
1053
1054 if (conf_touch_deps())
1055 return 1;
1056
1057 out = fopen(".tmpconfig", "w");
1058 if (!out)
1059 return 1;
1060
1061 out_h = fopen(".tmpconfig.h", "w");
1062 if (!out_h) {
1063 fclose(out);
1064 return 1;
1065 }
1066
1067 conf_write_heading(out, &kconfig_printer_cb, NULL);
1068 conf_write_heading(out_h, &header_printer_cb, NULL);
1069
1070 for_all_symbols(i, sym) {
1071 sym_calc_value(sym);
1072 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1073 continue;
1074
1075 /* write symbols to auto.conf and autoconf.h */
1076 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1077 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1078 }
1079 fclose(out);
1080 fclose(out_h);
1081
1082 name = getenv("KCONFIG_AUTOHEADER");
1083 if (!name)
1084 name = "include/generated/autoconf.h";
1085 if (make_parent_dir(name))
1086 return 1;
1087 if (rename(".tmpconfig.h", name))
1088 return 1;
1089
1090 if (make_parent_dir(autoconf_name))
1091 return 1;
1092 /*
1093 * This must be the last step, kbuild has a dependency on auto.conf
1094 * and this marks the successful completion of the previous steps.
1095 */
1096 if (rename(".tmpconfig", autoconf_name))
1097 return 1;
1098
1099 return 0;
1100}
1101
1102static int sym_change_count;
1103static void (*conf_changed_callback)(void);
1104
1105void sym_set_change_count(int count)
1106{
1107 int _sym_change_count = sym_change_count;
1108 sym_change_count = count;
1109 if (conf_changed_callback &&
1110 (bool)_sym_change_count != (bool)count)
1111 conf_changed_callback();
1112}
1113
1114void sym_add_change_count(int count)
1115{
1116 sym_set_change_count(count + sym_change_count);
1117}
1118
1119bool conf_get_changed(void)
1120{
1121 return sym_change_count;
1122}
1123
1124void conf_set_changed_callback(void (*fn)(void))
1125{
1126 conf_changed_callback = fn;
1127}
1128
1129static bool randomize_choice_values(struct symbol *csym)
1130{
1131 struct property *prop;
1132 struct symbol *sym;
1133 struct expr *e;
1134 int cnt, def;
1135
1136 /*
1137 * If choice is mod then we may have more items selected
1138 * and if no then no-one.
1139 * In both cases stop.
1140 */
1141 if (csym->curr.tri != yes)
1142 return false;
1143
1144 prop = sym_get_choice_prop(csym);
1145
1146 /* count entries in choice block */
1147 cnt = 0;
1148 expr_list_for_each_sym(prop->expr, e, sym)
1149 cnt++;
1150
1151 /*
1152 * find a random value and set it to yes,
1153 * set the rest to no so we have only one set
1154 */
1155 def = (rand() % cnt);
1156
1157 cnt = 0;
1158 expr_list_for_each_sym(prop->expr, e, sym) {
1159 if (def == cnt++) {
1160 sym->def[S_DEF_USER].tri = yes;
1161 csym->def[S_DEF_USER].val = sym;
1162 }
1163 else {
1164 sym->def[S_DEF_USER].tri = no;
1165 }
1166 sym->flags |= SYMBOL_DEF_USER;
1167 /* clear VALID to get value calculated */
1168 sym->flags &= ~SYMBOL_VALID;
1169 }
1170 csym->flags |= SYMBOL_DEF_USER;
1171 /* clear VALID to get value calculated */
1172 csym->flags &= ~(SYMBOL_VALID);
1173
1174 return true;
1175}
1176
1177void set_all_choice_values(struct symbol *csym)
1178{
1179 struct property *prop;
1180 struct symbol *sym;
1181 struct expr *e;
1182
1183 prop = sym_get_choice_prop(csym);
1184
1185 /*
1186 * Set all non-assinged choice values to no
1187 */
1188 expr_list_for_each_sym(prop->expr, e, sym) {
1189 if (!sym_has_value(sym))
1190 sym->def[S_DEF_USER].tri = no;
1191 }
1192 csym->flags |= SYMBOL_DEF_USER;
1193 /* clear VALID to get value calculated */
1194 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1195}
1196
1197bool conf_set_all_new_symbols(enum conf_def_mode mode)
1198{
1199 struct symbol *sym, *csym;
1200 int i, cnt, pby, pty, ptm; /* pby: probability of bool = y
1201 * pty: probability of tristate = y
1202 * ptm: probability of tristate = m
1203 */
1204
1205 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1206 * below, otherwise gcc whines about
1207 * -Wmaybe-uninitialized */
1208 if (mode == def_random) {
1209 int n, p[3];
1210 char *env = getenv("KCONFIG_PROBABILITY");
1211 n = 0;
1212 while( env && *env ) {
1213 char *endp;
1214 int tmp = strtol( env, &endp, 10 );
1215 if( tmp >= 0 && tmp <= 100 ) {
1216 p[n++] = tmp;
1217 } else {
1218 errno = ERANGE;
1219 perror( "KCONFIG_PROBABILITY" );
1220 exit( 1 );
1221 }
1222 env = (*endp == ':') ? endp+1 : endp;
1223 if( n >=3 ) {
1224 break;
1225 }
1226 }
1227 switch( n ) {
1228 case 1:
1229 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1230 break;
1231 case 2:
1232 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1233 break;
1234 case 3:
1235 pby = p[0]; pty = p[1]; ptm = p[2];
1236 break;
1237 }
1238
1239 if( pty+ptm > 100 ) {
1240 errno = ERANGE;
1241 perror( "KCONFIG_PROBABILITY" );
1242 exit( 1 );
1243 }
1244 }
1245 bool has_changed = false;
1246
1247 for_all_symbols(i, sym) {
1248 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1249 continue;
1250 switch (sym_get_type(sym)) {
1251 case S_BOOLEAN:
1252 case S_TRISTATE:
1253 has_changed = true;
1254 switch (mode) {
1255 case def_yes:
1256 sym->def[S_DEF_USER].tri = yes;
1257 break;
1258 case def_mod:
1259 sym->def[S_DEF_USER].tri = mod;
1260 break;
1261 case def_no:
1262 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1263 sym->def[S_DEF_USER].tri = yes;
1264 else
1265 sym->def[S_DEF_USER].tri = no;
1266 break;
1267 case def_random:
1268 sym->def[S_DEF_USER].tri = no;
1269 cnt = rand() % 100;
1270 if (sym->type == S_TRISTATE) {
1271 if (cnt < pty)
1272 sym->def[S_DEF_USER].tri = yes;
1273 else if (cnt < (pty+ptm))
1274 sym->def[S_DEF_USER].tri = mod;
1275 } else if (cnt < pby)
1276 sym->def[S_DEF_USER].tri = yes;
1277 break;
1278 default:
1279 continue;
1280 }
1281 if (!(sym_is_choice(sym) && mode == def_random))
1282 sym->flags |= SYMBOL_DEF_USER;
1283 break;
1284 default:
1285 break;
1286 }
1287
1288 }
1289
1290 sym_clear_all_valid();
1291
1292 /*
1293 * We have different type of choice blocks.
1294 * If curr.tri equals to mod then we can select several
1295 * choice symbols in one block.
1296 * In this case we do nothing.
1297 * If curr.tri equals yes then only one symbol can be
1298 * selected in a choice block and we set it to yes,
1299 * and the rest to no.
1300 */
1301 if (mode != def_random) {
1302 for_all_symbols(i, csym) {
1303 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1304 sym_is_choice_value(csym))
1305 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1306 }
1307 }
1308
1309 for_all_symbols(i, csym) {
1310 if (sym_has_value(csym) || !sym_is_choice(csym))
1311 continue;
1312
1313 sym_calc_value(csym);
1314 if (mode == def_random)
1315 has_changed |= randomize_choice_values(csym);
1316 else {
1317 set_all_choice_values(csym);
1318 has_changed = true;
1319 }
1320 }
1321
1322 return has_changed;
1323}
1324
1325void conf_rewrite_mod_or_yes(enum conf_def_mode mode)
1326{
1327 struct symbol *sym;
1328 int i;
1329 tristate old_val = (mode == def_y2m) ? yes : mod;
1330 tristate new_val = (mode == def_y2m) ? mod : yes;
1331
1332 for_all_symbols(i, sym) {
1333 if (sym_get_type(sym) == S_TRISTATE &&
1334 sym->def[S_DEF_USER].tri == old_val)
1335 sym->def[S_DEF_USER].tri = new_val;
1336 }
1337 sym_clear_all_valid();
1338}
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 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
144 return 1;
145 case S_OTHER:
146 if (*p != '"') {
147 for (p2 = p; *p2 && !isspace(*p2); p2++)
148 ;
149 sym->type = S_STRING;
150 goto done;
151 }
152 /* fall through */
153 case S_STRING:
154 if (*p++ != '"')
155 break;
156 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
157 if (*p2 == '"') {
158 *p2 = 0;
159 break;
160 }
161 memmove(p2, p2 + 1, strlen(p2));
162 }
163 if (!p2) {
164 conf_warning("invalid string found");
165 return 1;
166 }
167 /* fall through */
168 case S_INT:
169 case S_HEX:
170 done:
171 if (sym_string_valid(sym, p)) {
172 sym->def[def].val = strdup(p);
173 sym->flags |= def_flags;
174 } else {
175 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
176 return 1;
177 }
178 break;
179 default:
180 ;
181 }
182 return 0;
183}
184
185int conf_read_simple(const char *name, int def)
186{
187 FILE *in = NULL;
188 char line[1024];
189 char *p, *p2;
190 struct symbol *sym;
191 int i, def_flags;
192
193 if (name) {
194 in = zconf_fopen(name);
195 } else {
196 struct property *prop;
197
198 name = conf_get_configname();
199 in = zconf_fopen(name);
200 if (in)
201 goto load;
202 sym_add_change_count(1);
203 if (!sym_defconfig_list) {
204 if (modules_sym)
205 sym_calc_value(modules_sym);
206 return 1;
207 }
208
209 for_all_defaults(sym_defconfig_list, prop) {
210 if (expr_calc_value(prop->visible.expr) == no ||
211 prop->expr->type != E_SYMBOL)
212 continue;
213 name = conf_expand_value(prop->expr->left.sym->name);
214 in = zconf_fopen(name);
215 if (in) {
216 conf_message(_("using defaults found in %s"),
217 name);
218 goto load;
219 }
220 }
221 }
222 if (!in)
223 return 1;
224
225load:
226 conf_filename = name;
227 conf_lineno = 0;
228 conf_warnings = 0;
229 conf_unsaved = 0;
230
231 def_flags = SYMBOL_DEF << def;
232 for_all_symbols(i, sym) {
233 sym->flags |= SYMBOL_CHANGED;
234 sym->flags &= ~(def_flags|SYMBOL_VALID);
235 if (sym_is_choice(sym))
236 sym->flags |= def_flags;
237 switch (sym->type) {
238 case S_INT:
239 case S_HEX:
240 case S_STRING:
241 if (sym->def[def].val)
242 free(sym->def[def].val);
243 /* fall through */
244 default:
245 sym->def[def].val = NULL;
246 sym->def[def].tri = no;
247 }
248 }
249
250 while (fgets(line, sizeof(line), in)) {
251 conf_lineno++;
252 sym = NULL;
253 if (line[0] == '#') {
254 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
255 continue;
256 p = strchr(line + 2 + strlen(CONFIG_), ' ');
257 if (!p)
258 continue;
259 *p++ = 0;
260 if (strncmp(p, "is not set", 10))
261 continue;
262 if (def == S_DEF_USER) {
263 sym = sym_find(line + 2 + strlen(CONFIG_));
264 if (!sym) {
265 sym_add_change_count(1);
266 goto setsym;
267 }
268 } else {
269 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
270 if (sym->type == S_UNKNOWN)
271 sym->type = S_BOOLEAN;
272 }
273 if (sym->flags & def_flags) {
274 conf_warning("override: reassigning to symbol %s", sym->name);
275 }
276 switch (sym->type) {
277 case S_BOOLEAN:
278 case S_TRISTATE:
279 sym->def[def].tri = no;
280 sym->flags |= def_flags;
281 break;
282 default:
283 ;
284 }
285 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
286 p = strchr(line + strlen(CONFIG_), '=');
287 if (!p)
288 continue;
289 *p++ = 0;
290 p2 = strchr(p, '\n');
291 if (p2) {
292 *p2-- = 0;
293 if (*p2 == '\r')
294 *p2 = 0;
295 }
296 if (def == S_DEF_USER) {
297 sym = sym_find(line + strlen(CONFIG_));
298 if (!sym) {
299 sym_add_change_count(1);
300 goto setsym;
301 }
302 } else {
303 sym = sym_lookup(line + strlen(CONFIG_), 0);
304 if (sym->type == S_UNKNOWN)
305 sym->type = S_OTHER;
306 }
307 if (sym->flags & def_flags) {
308 conf_warning("override: reassigning to symbol %s", sym->name);
309 }
310 if (conf_set_sym_val(sym, def, def_flags, p))
311 continue;
312 } else {
313 if (line[0] != '\r' && line[0] != '\n')
314 conf_warning("unexpected data");
315 continue;
316 }
317setsym:
318 if (sym && sym_is_choice_value(sym)) {
319 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
320 switch (sym->def[def].tri) {
321 case no:
322 break;
323 case mod:
324 if (cs->def[def].tri == yes) {
325 conf_warning("%s creates inconsistent choice state", sym->name);
326 cs->flags &= ~def_flags;
327 }
328 break;
329 case yes:
330 if (cs->def[def].tri != no)
331 conf_warning("override: %s changes choice state", sym->name);
332 cs->def[def].val = sym;
333 break;
334 }
335 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
336 }
337 }
338 fclose(in);
339
340 if (modules_sym)
341 sym_calc_value(modules_sym);
342 return 0;
343}
344
345int conf_read(const char *name)
346{
347 struct symbol *sym, *choice_sym;
348 struct property *prop;
349 struct expr *e;
350 int i, flags;
351
352 sym_set_change_count(0);
353
354 if (conf_read_simple(name, S_DEF_USER))
355 return 1;
356
357 for_all_symbols(i, sym) {
358 sym_calc_value(sym);
359 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
360 goto sym_ok;
361 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
362 /* check that calculated value agrees with saved value */
363 switch (sym->type) {
364 case S_BOOLEAN:
365 case S_TRISTATE:
366 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
367 break;
368 if (!sym_is_choice(sym))
369 goto sym_ok;
370 /* fall through */
371 default:
372 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
373 goto sym_ok;
374 break;
375 }
376 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
377 /* no previous value and not saved */
378 goto sym_ok;
379 conf_unsaved++;
380 /* maybe print value in verbose mode... */
381 sym_ok:
382 if (!sym_is_choice(sym))
383 continue;
384 /* The choice symbol only has a set value (and thus is not new)
385 * if all its visible childs have values.
386 */
387 prop = sym_get_choice_prop(sym);
388 flags = sym->flags;
389 expr_list_for_each_sym(prop->expr, e, choice_sym)
390 if (choice_sym->visible != no)
391 flags &= choice_sym->flags;
392 sym->flags &= flags | ~SYMBOL_DEF_USER;
393 }
394
395 for_all_symbols(i, sym) {
396 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
397 /* Reset values of generates values, so they'll appear
398 * as new, if they should become visible, but that
399 * doesn't quite work if the Kconfig and the saved
400 * configuration disagree.
401 */
402 if (sym->visible == no && !conf_unsaved)
403 sym->flags &= ~SYMBOL_DEF_USER;
404 switch (sym->type) {
405 case S_STRING:
406 case S_INT:
407 case S_HEX:
408 /* Reset a string value if it's out of range */
409 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
410 break;
411 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
412 conf_unsaved++;
413 break;
414 default:
415 break;
416 }
417 }
418 }
419
420 sym_add_change_count(conf_warnings || conf_unsaved);
421
422 return 0;
423}
424
425/*
426 * Kconfig configuration printer
427 *
428 * This printer is used when generating the resulting configuration after
429 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
430 * passing a non-NULL argument to the printer.
431 *
432 */
433static void
434kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
435{
436
437 switch (sym->type) {
438 case S_BOOLEAN:
439 case S_TRISTATE:
440 if (*value == 'n') {
441 bool skip_unset = (arg != NULL);
442
443 if (!skip_unset)
444 fprintf(fp, "# %s%s is not set\n",
445 CONFIG_, sym->name);
446 return;
447 }
448 break;
449 default:
450 break;
451 }
452
453 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
454}
455
456static void
457kconfig_print_comment(FILE *fp, const char *value, void *arg)
458{
459 const char *p = value;
460 size_t l;
461
462 for (;;) {
463 l = strcspn(p, "\n");
464 fprintf(fp, "#");
465 if (l) {
466 fprintf(fp, " ");
467 fwrite(p, l, 1, fp);
468 p += l;
469 }
470 fprintf(fp, "\n");
471 if (*p++ == '\0')
472 break;
473 }
474}
475
476static struct conf_printer kconfig_printer_cb =
477{
478 .print_symbol = kconfig_print_symbol,
479 .print_comment = kconfig_print_comment,
480};
481
482/*
483 * Header printer
484 *
485 * This printer is used when generating the `include/generated/autoconf.h' file.
486 */
487static void
488header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
489{
490
491 switch (sym->type) {
492 case S_BOOLEAN:
493 case S_TRISTATE: {
494 const char *suffix = "";
495
496 switch (*value) {
497 case 'n':
498 break;
499 case 'm':
500 suffix = "_MODULE";
501 /* fall through */
502 default:
503 fprintf(fp, "#define %s%s%s 1\n",
504 CONFIG_, sym->name, suffix);
505 }
506 /*
507 * Generate the __enabled_CONFIG_* and
508 * __enabled_CONFIG_*_MODULE macros for use by the
509 * IS_{ENABLED,BUILTIN,MODULE} macros. The _MODULE variant is
510 * generated even for booleans so that the IS_ENABLED() macro
511 * works.
512 */
513 fprintf(fp, "#define __enabled_" CONFIG_ "%s %d\n",
514 sym->name, (*value == 'y'));
515 fprintf(fp, "#define __enabled_" CONFIG_ "%s_MODULE %d\n",
516 sym->name, (*value == 'm'));
517 break;
518 }
519 case S_HEX: {
520 const char *prefix = "";
521
522 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
523 prefix = "0x";
524 fprintf(fp, "#define %s%s %s%s\n",
525 CONFIG_, sym->name, prefix, value);
526 break;
527 }
528 case S_STRING:
529 case S_INT:
530 fprintf(fp, "#define %s%s %s\n",
531 CONFIG_, sym->name, value);
532 break;
533 default:
534 break;
535 }
536
537}
538
539static void
540header_print_comment(FILE *fp, const char *value, void *arg)
541{
542 const char *p = value;
543 size_t l;
544
545 fprintf(fp, "/*\n");
546 for (;;) {
547 l = strcspn(p, "\n");
548 fprintf(fp, " *");
549 if (l) {
550 fprintf(fp, " ");
551 fwrite(p, l, 1, fp);
552 p += l;
553 }
554 fprintf(fp, "\n");
555 if (*p++ == '\0')
556 break;
557 }
558 fprintf(fp, " */\n");
559}
560
561static struct conf_printer header_printer_cb =
562{
563 .print_symbol = header_print_symbol,
564 .print_comment = header_print_comment,
565};
566
567/*
568 * Tristate printer
569 *
570 * This printer is used when generating the `include/config/tristate.conf' file.
571 */
572static void
573tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
574{
575
576 if (sym->type == S_TRISTATE && *value != 'n')
577 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
578}
579
580static struct conf_printer tristate_printer_cb =
581{
582 .print_symbol = tristate_print_symbol,
583 .print_comment = kconfig_print_comment,
584};
585
586static void conf_write_symbol(FILE *fp, struct symbol *sym,
587 struct conf_printer *printer, void *printer_arg)
588{
589 const char *str;
590
591 switch (sym->type) {
592 case S_OTHER:
593 case S_UNKNOWN:
594 break;
595 case S_STRING:
596 str = sym_get_string_value(sym);
597 str = sym_escape_string_value(str);
598 printer->print_symbol(fp, sym, str, printer_arg);
599 free((void *)str);
600 break;
601 default:
602 str = sym_get_string_value(sym);
603 printer->print_symbol(fp, sym, str, printer_arg);
604 }
605}
606
607static void
608conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
609{
610 char buf[256];
611
612 snprintf(buf, sizeof(buf),
613 "\n"
614 "Automatically generated file; DO NOT EDIT.\n"
615 "%s\n",
616 rootmenu.prompt->text);
617
618 printer->print_comment(fp, buf, printer_arg);
619}
620
621/*
622 * Write out a minimal config.
623 * All values that has default values are skipped as this is redundant.
624 */
625int conf_write_defconfig(const char *filename)
626{
627 struct symbol *sym;
628 struct menu *menu;
629 FILE *out;
630
631 out = fopen(filename, "w");
632 if (!out)
633 return 1;
634
635 sym_clear_all_valid();
636
637 /* Traverse all menus to find all relevant symbols */
638 menu = rootmenu.list;
639
640 while (menu != NULL)
641 {
642 sym = menu->sym;
643 if (sym == NULL) {
644 if (!menu_is_visible(menu))
645 goto next_menu;
646 } else if (!sym_is_choice(sym)) {
647 sym_calc_value(sym);
648 if (!(sym->flags & SYMBOL_WRITE))
649 goto next_menu;
650 sym->flags &= ~SYMBOL_WRITE;
651 /* If we cannot change the symbol - skip */
652 if (!sym_is_changable(sym))
653 goto next_menu;
654 /* If symbol equals to default value - skip */
655 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
656 goto next_menu;
657
658 /*
659 * If symbol is a choice value and equals to the
660 * default for a choice - skip.
661 * But only if value is bool and equal to "y" and
662 * choice is not "optional".
663 * (If choice is "optional" then all values can be "n")
664 */
665 if (sym_is_choice_value(sym)) {
666 struct symbol *cs;
667 struct symbol *ds;
668
669 cs = prop_get_symbol(sym_get_choice_prop(sym));
670 ds = sym_choice_default(cs);
671 if (!sym_is_optional(cs) && sym == ds) {
672 if ((sym->type == S_BOOLEAN) &&
673 sym_get_tristate_value(sym) == yes)
674 goto next_menu;
675 }
676 }
677 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
678 }
679next_menu:
680 if (menu->list != NULL) {
681 menu = menu->list;
682 }
683 else if (menu->next != NULL) {
684 menu = menu->next;
685 } else {
686 while ((menu = menu->parent)) {
687 if (menu->next != NULL) {
688 menu = menu->next;
689 break;
690 }
691 }
692 }
693 }
694 fclose(out);
695 return 0;
696}
697
698int conf_write(const char *name)
699{
700 FILE *out;
701 struct symbol *sym;
702 struct menu *menu;
703 const char *basename;
704 const char *str;
705 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
706 char *env;
707
708 dirname[0] = 0;
709 if (name && name[0]) {
710 struct stat st;
711 char *slash;
712
713 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
714 strcpy(dirname, name);
715 strcat(dirname, "/");
716 basename = conf_get_configname();
717 } else if ((slash = strrchr(name, '/'))) {
718 int size = slash - name + 1;
719 memcpy(dirname, name, size);
720 dirname[size] = 0;
721 if (slash[1])
722 basename = slash + 1;
723 else
724 basename = conf_get_configname();
725 } else
726 basename = name;
727 } else
728 basename = conf_get_configname();
729
730 sprintf(newname, "%s%s", dirname, basename);
731 env = getenv("KCONFIG_OVERWRITECONFIG");
732 if (!env || !*env) {
733 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
734 out = fopen(tmpname, "w");
735 } else {
736 *tmpname = 0;
737 out = fopen(newname, "w");
738 }
739 if (!out)
740 return 1;
741
742 conf_write_heading(out, &kconfig_printer_cb, NULL);
743
744 if (!conf_get_changed())
745 sym_clear_all_valid();
746
747 menu = rootmenu.list;
748 while (menu) {
749 sym = menu->sym;
750 if (!sym) {
751 if (!menu_is_visible(menu))
752 goto next;
753 str = menu_get_prompt(menu);
754 fprintf(out, "\n"
755 "#\n"
756 "# %s\n"
757 "#\n", str);
758 } else if (!(sym->flags & SYMBOL_CHOICE)) {
759 sym_calc_value(sym);
760 if (!(sym->flags & SYMBOL_WRITE))
761 goto next;
762 sym->flags &= ~SYMBOL_WRITE;
763
764 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
765 }
766
767next:
768 if (menu->list) {
769 menu = menu->list;
770 continue;
771 }
772 if (menu->next)
773 menu = menu->next;
774 else while ((menu = menu->parent)) {
775 if (menu->next) {
776 menu = menu->next;
777 break;
778 }
779 }
780 }
781 fclose(out);
782
783 if (*tmpname) {
784 strcat(dirname, basename);
785 strcat(dirname, ".old");
786 rename(newname, dirname);
787 if (rename(tmpname, newname))
788 return 1;
789 }
790
791 conf_message(_("configuration written to %s"), newname);
792
793 sym_set_change_count(0);
794
795 return 0;
796}
797
798static int conf_split_config(void)
799{
800 const char *name;
801 char path[PATH_MAX+1];
802 char *s, *d, c;
803 struct symbol *sym;
804 struct stat sb;
805 int res, i, fd;
806
807 name = conf_get_autoconfig_name();
808 conf_read_simple(name, S_DEF_AUTO);
809
810 if (chdir("include/config"))
811 return 1;
812
813 res = 0;
814 for_all_symbols(i, sym) {
815 sym_calc_value(sym);
816 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
817 continue;
818 if (sym->flags & SYMBOL_WRITE) {
819 if (sym->flags & SYMBOL_DEF_AUTO) {
820 /*
821 * symbol has old and new value,
822 * so compare them...
823 */
824 switch (sym->type) {
825 case S_BOOLEAN:
826 case S_TRISTATE:
827 if (sym_get_tristate_value(sym) ==
828 sym->def[S_DEF_AUTO].tri)
829 continue;
830 break;
831 case S_STRING:
832 case S_HEX:
833 case S_INT:
834 if (!strcmp(sym_get_string_value(sym),
835 sym->def[S_DEF_AUTO].val))
836 continue;
837 break;
838 default:
839 break;
840 }
841 } else {
842 /*
843 * If there is no old value, only 'no' (unset)
844 * is allowed as new value.
845 */
846 switch (sym->type) {
847 case S_BOOLEAN:
848 case S_TRISTATE:
849 if (sym_get_tristate_value(sym) == no)
850 continue;
851 break;
852 default:
853 break;
854 }
855 }
856 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
857 /* There is neither an old nor a new value. */
858 continue;
859 /* else
860 * There is an old value, but no new value ('no' (unset)
861 * isn't saved in auto.conf, so the old value is always
862 * different from 'no').
863 */
864
865 /* Replace all '_' and append ".h" */
866 s = sym->name;
867 d = path;
868 while ((c = *s++)) {
869 c = tolower(c);
870 *d++ = (c == '_') ? '/' : c;
871 }
872 strcpy(d, ".h");
873
874 /* Assume directory path already exists. */
875 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
876 if (fd == -1) {
877 if (errno != ENOENT) {
878 res = 1;
879 break;
880 }
881 /*
882 * Create directory components,
883 * unless they exist already.
884 */
885 d = path;
886 while ((d = strchr(d, '/'))) {
887 *d = 0;
888 if (stat(path, &sb) && mkdir(path, 0755)) {
889 res = 1;
890 goto out;
891 }
892 *d++ = '/';
893 }
894 /* Try it again. */
895 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
896 if (fd == -1) {
897 res = 1;
898 break;
899 }
900 }
901 close(fd);
902 }
903out:
904 if (chdir("../.."))
905 return 1;
906
907 return res;
908}
909
910int conf_write_autoconf(void)
911{
912 struct symbol *sym;
913 const char *name;
914 FILE *out, *tristate, *out_h;
915 int i;
916
917 sym_clear_all_valid();
918
919 file_write_dep("include/config/auto.conf.cmd");
920
921 if (conf_split_config())
922 return 1;
923
924 out = fopen(".tmpconfig", "w");
925 if (!out)
926 return 1;
927
928 tristate = fopen(".tmpconfig_tristate", "w");
929 if (!tristate) {
930 fclose(out);
931 return 1;
932 }
933
934 out_h = fopen(".tmpconfig.h", "w");
935 if (!out_h) {
936 fclose(out);
937 fclose(tristate);
938 return 1;
939 }
940
941 conf_write_heading(out, &kconfig_printer_cb, NULL);
942
943 conf_write_heading(tristate, &tristate_printer_cb, NULL);
944
945 conf_write_heading(out_h, &header_printer_cb, NULL);
946
947 for_all_symbols(i, sym) {
948 sym_calc_value(sym);
949 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
950 continue;
951
952 /* write symbol to auto.conf, tristate and header files */
953 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
954
955 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
956
957 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
958 }
959 fclose(out);
960 fclose(tristate);
961 fclose(out_h);
962
963 name = getenv("KCONFIG_AUTOHEADER");
964 if (!name)
965 name = "include/generated/autoconf.h";
966 if (rename(".tmpconfig.h", name))
967 return 1;
968 name = getenv("KCONFIG_TRISTATE");
969 if (!name)
970 name = "include/config/tristate.conf";
971 if (rename(".tmpconfig_tristate", name))
972 return 1;
973 name = conf_get_autoconfig_name();
974 /*
975 * This must be the last step, kbuild has a dependency on auto.conf
976 * and this marks the successful completion of the previous steps.
977 */
978 if (rename(".tmpconfig", name))
979 return 1;
980
981 return 0;
982}
983
984static int sym_change_count;
985static void (*conf_changed_callback)(void);
986
987void sym_set_change_count(int count)
988{
989 int _sym_change_count = sym_change_count;
990 sym_change_count = count;
991 if (conf_changed_callback &&
992 (bool)_sym_change_count != (bool)count)
993 conf_changed_callback();
994}
995
996void sym_add_change_count(int count)
997{
998 sym_set_change_count(count + sym_change_count);
999}
1000
1001bool conf_get_changed(void)
1002{
1003 return sym_change_count;
1004}
1005
1006void conf_set_changed_callback(void (*fn)(void))
1007{
1008 conf_changed_callback = fn;
1009}
1010
1011static void randomize_choice_values(struct symbol *csym)
1012{
1013 struct property *prop;
1014 struct symbol *sym;
1015 struct expr *e;
1016 int cnt, def;
1017
1018 /*
1019 * If choice is mod then we may have more items selected
1020 * and if no then no-one.
1021 * In both cases stop.
1022 */
1023 if (csym->curr.tri != yes)
1024 return;
1025
1026 prop = sym_get_choice_prop(csym);
1027
1028 /* count entries in choice block */
1029 cnt = 0;
1030 expr_list_for_each_sym(prop->expr, e, sym)
1031 cnt++;
1032
1033 /*
1034 * find a random value and set it to yes,
1035 * set the rest to no so we have only one set
1036 */
1037 def = (rand() % cnt);
1038
1039 cnt = 0;
1040 expr_list_for_each_sym(prop->expr, e, sym) {
1041 if (def == cnt++) {
1042 sym->def[S_DEF_USER].tri = yes;
1043 csym->def[S_DEF_USER].val = sym;
1044 }
1045 else {
1046 sym->def[S_DEF_USER].tri = no;
1047 }
1048 }
1049 csym->flags |= SYMBOL_DEF_USER;
1050 /* clear VALID to get value calculated */
1051 csym->flags &= ~(SYMBOL_VALID);
1052}
1053
1054static void set_all_choice_values(struct symbol *csym)
1055{
1056 struct property *prop;
1057 struct symbol *sym;
1058 struct expr *e;
1059
1060 prop = sym_get_choice_prop(csym);
1061
1062 /*
1063 * Set all non-assinged choice values to no
1064 */
1065 expr_list_for_each_sym(prop->expr, e, sym) {
1066 if (!sym_has_value(sym))
1067 sym->def[S_DEF_USER].tri = no;
1068 }
1069 csym->flags |= SYMBOL_DEF_USER;
1070 /* clear VALID to get value calculated */
1071 csym->flags &= ~(SYMBOL_VALID);
1072}
1073
1074void conf_set_all_new_symbols(enum conf_def_mode mode)
1075{
1076 struct symbol *sym, *csym;
1077 int i, cnt;
1078
1079 for_all_symbols(i, sym) {
1080 if (sym_has_value(sym))
1081 continue;
1082 switch (sym_get_type(sym)) {
1083 case S_BOOLEAN:
1084 case S_TRISTATE:
1085 switch (mode) {
1086 case def_yes:
1087 sym->def[S_DEF_USER].tri = yes;
1088 break;
1089 case def_mod:
1090 sym->def[S_DEF_USER].tri = mod;
1091 break;
1092 case def_no:
1093 sym->def[S_DEF_USER].tri = no;
1094 break;
1095 case def_random:
1096 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1097 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1098 break;
1099 default:
1100 continue;
1101 }
1102 if (!(sym_is_choice(sym) && mode == def_random))
1103 sym->flags |= SYMBOL_DEF_USER;
1104 break;
1105 default:
1106 break;
1107 }
1108
1109 }
1110
1111 sym_clear_all_valid();
1112
1113 /*
1114 * We have different type of choice blocks.
1115 * If curr.tri equals to mod then we can select several
1116 * choice symbols in one block.
1117 * In this case we do nothing.
1118 * If curr.tri equals yes then only one symbol can be
1119 * selected in a choice block and we set it to yes,
1120 * and the rest to no.
1121 */
1122 for_all_symbols(i, csym) {
1123 if (sym_has_value(csym) || !sym_is_choice(csym))
1124 continue;
1125
1126 sym_calc_value(csym);
1127 if (mode == def_random)
1128 randomize_choice_values(csym);
1129 else
1130 set_all_choice_values(csym);
1131 }
1132}