projects/linux·blob v5.0 · refs

1324 lines · 27.1 KiB

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