2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
15 #define LKC_DIRECT_LINK
18 static void conf_warning(const char *fmt, ...)
19 __attribute__ ((format (printf, 1, 2)));
21 static const char *conf_filename;
22 static int conf_lineno, conf_warnings, conf_unsaved;
24 const char conf_defname[] = "arch/$ARCH/defconfig";
26 static void conf_warning(const char *fmt, ...)
30 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
31 vfprintf(stderr, fmt, ap);
32 fprintf(stderr, "\n");
37 const char *conf_get_configname(void)
39 char *name = getenv("KCONFIG_CONFIG");
41 return name ? name : ".config";
44 const char *conf_get_autoconfig_name(void)
46 char *name = getenv("KCONFIG_AUTOCONFIG");
48 return name ? name : "include/config/auto.conf";
51 static char *conf_expand_value(const char *in)
55 static char res_value[SYMBOL_MAXLENGTH];
56 char *dst, name[SYMBOL_MAXLENGTH];
60 while ((src = strchr(in, '$'))) {
61 strncat(res_value, in, src - in);
64 while (isalnum(*src) || *src == '_')
67 sym = sym_lookup(name, 0);
69 strcat(res_value, sym_get_string_value(sym));
72 strcat(res_value, in);
77 char *conf_get_default_confname(void)
80 static char fullname[PATH_MAX+1];
83 name = conf_expand_value(conf_defname);
84 env = getenv(SRCTREE);
86 sprintf(fullname, "%s/%s", env, name);
87 if (!stat(fullname, &buf))
93 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
100 sym->def[def].tri = mod;
101 sym->flags |= def_flags;
106 sym->def[def].tri = yes;
107 sym->flags |= def_flags;
111 sym->def[def].tri = no;
112 sym->flags |= def_flags;
115 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
119 for (p2 = p; *p2 && !isspace(*p2); p2++)
121 sym->type = S_STRING;
127 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
132 memmove(p2, p2 + 1, strlen(p2));
135 conf_warning("invalid string found");
141 if (sym_string_valid(sym, p)) {
142 sym->def[def].val = strdup(p);
143 sym->flags |= def_flags;
145 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
155 int conf_read_simple(const char *name, int def)
164 in = zconf_fopen(name);
166 struct property *prop;
168 name = conf_get_configname();
169 in = zconf_fopen(name);
172 sym_add_change_count(1);
173 if (!sym_defconfig_list)
176 for_all_defaults(sym_defconfig_list, prop) {
177 if (expr_calc_value(prop->visible.expr) == no ||
178 prop->expr->type != E_SYMBOL)
180 name = conf_expand_value(prop->expr->left.sym->name);
181 in = zconf_fopen(name);
184 "# using defaults found in %s\n"
194 conf_filename = name;
199 def_flags = SYMBOL_DEF << def;
200 for_all_symbols(i, sym) {
201 sym->flags |= SYMBOL_CHANGED;
202 sym->flags &= ~(def_flags|SYMBOL_VALID);
203 if (sym_is_choice(sym))
204 sym->flags |= def_flags;
209 if (sym->def[def].val)
210 free(sym->def[def].val);
212 sym->def[def].val = NULL;
213 sym->def[def].tri = no;
217 while (fgets(line, sizeof(line), in)) {
222 if (memcmp(line + 2, "CONFIG_", 7))
224 p = strchr(line + 9, ' ');
228 if (strncmp(p, "is not set", 10))
230 if (def == S_DEF_USER) {
231 sym = sym_find(line + 9);
233 sym_add_change_count(1);
237 sym = sym_lookup(line + 9, 0);
238 if (sym->type == S_UNKNOWN)
239 sym->type = S_BOOLEAN;
241 if (sym->flags & def_flags) {
242 conf_warning("override: reassigning to symbol %s", sym->name);
247 sym->def[def].tri = no;
248 sym->flags |= def_flags;
255 if (memcmp(line, "CONFIG_", 7)) {
256 conf_warning("unexpected data");
259 p = strchr(line + 7, '=');
263 p2 = strchr(p, '\n');
269 if (def == S_DEF_USER) {
270 sym = sym_find(line + 7);
272 sym_add_change_count(1);
276 sym = sym_lookup(line + 7, 0);
277 if (sym->type == S_UNKNOWN)
280 if (sym->flags & def_flags) {
281 conf_warning("override: reassigning to symbol %s", sym->name);
283 if (conf_set_sym_val(sym, def, def_flags, p))
290 conf_warning("unexpected data");
293 if (sym && sym_is_choice_value(sym)) {
294 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
295 switch (sym->def[def].tri) {
299 if (cs->def[def].tri == yes) {
300 conf_warning("%s creates inconsistent choice state", sym->name);
301 cs->flags &= ~def_flags;
305 if (cs->def[def].tri != no)
306 conf_warning("override: %s changes choice state", sym->name);
307 cs->def[def].val = sym;
310 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
316 sym_calc_value(modules_sym);
320 int conf_read(const char *name)
322 struct symbol *sym, *choice_sym;
323 struct property *prop;
327 sym_set_change_count(0);
329 if (conf_read_simple(name, S_DEF_USER))
332 for_all_symbols(i, sym) {
334 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
336 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
337 /* check that calculated value agrees with saved value */
341 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
343 if (!sym_is_choice(sym))
346 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
350 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
351 /* no previous value and not saved */
354 /* maybe print value in verbose mode... */
356 if (!sym_is_choice(sym))
358 /* The choice symbol only has a set value (and thus is not new)
359 * if all its visible childs have values.
361 prop = sym_get_choice_prop(sym);
363 expr_list_for_each_sym(prop->expr, e, choice_sym)
364 if (choice_sym->visible != no)
365 flags &= choice_sym->flags;
366 sym->flags &= flags | ~SYMBOL_DEF_USER;
369 for_all_symbols(i, sym) {
370 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
371 /* Reset values of generates values, so they'll appear
372 * as new, if they should become visible, but that
373 * doesn't quite work if the Kconfig and the saved
374 * configuration disagree.
376 if (sym->visible == no && !conf_unsaved)
377 sym->flags &= ~SYMBOL_DEF_USER;
382 /* Reset a string value if it's out of range */
383 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
385 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
394 sym_add_change_count(conf_warnings || conf_unsaved);
399 int conf_write(const char *name)
404 const char *basename;
405 char dirname[128], tmpname[128], newname[128];
409 int use_timestamp = 1;
413 if (name && name[0]) {
417 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
418 strcpy(dirname, name);
419 strcat(dirname, "/");
420 basename = conf_get_configname();
421 } else if ((slash = strrchr(name, '/'))) {
422 int size = slash - name + 1;
423 memcpy(dirname, name, size);
426 basename = slash + 1;
428 basename = conf_get_configname();
432 basename = conf_get_configname();
434 sprintf(newname, "%s%s", dirname, basename);
435 env = getenv("KCONFIG_OVERWRITECONFIG");
437 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
438 out = fopen(tmpname, "w");
441 out = fopen(newname, "w");
446 sym = sym_lookup("KERNELVERSION", 0);
449 env = getenv("KCONFIG_NOTIMESTAMP");
454 "# Automatically generated make config: don't edit\n"
455 "# Linux kernel version: %s\n"
458 sym_get_string_value(sym),
459 use_timestamp ? "# " : "",
460 use_timestamp ? ctime(&now) : "");
462 if (!conf_get_changed())
463 sym_clear_all_valid();
465 menu = rootmenu.list;
469 if (!menu_is_visible(menu))
471 str = menu_get_prompt(menu);
476 } else if (!(sym->flags & SYMBOL_CHOICE)) {
478 if (!(sym->flags & SYMBOL_WRITE))
480 sym->flags &= ~SYMBOL_WRITE;
482 if (type == S_TRISTATE) {
483 sym_calc_value(modules_sym);
484 if (modules_sym->curr.tri == no)
490 switch (sym_get_tristate_value(sym)) {
492 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
495 fprintf(out, "CONFIG_%s=m\n", sym->name);
498 fprintf(out, "CONFIG_%s=y\n", sym->name);
503 str = sym_get_string_value(sym);
504 fprintf(out, "CONFIG_%s=\"", sym->name);
506 l = strcspn(str, "\"\\");
508 fwrite(str, l, 1, out);
513 fprintf(out, "\\%c", *str++);
518 str = sym_get_string_value(sym);
519 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
520 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
524 str = sym_get_string_value(sym);
525 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
537 else while ((menu = menu->parent)) {
547 strcat(dirname, basename);
548 strcat(dirname, ".old");
549 rename(newname, dirname);
550 if (rename(tmpname, newname))
555 "# configuration written to %s\n"
558 sym_set_change_count(0);
563 static int conf_split_config(void)
572 name = conf_get_autoconfig_name();
573 conf_read_simple(name, S_DEF_AUTO);
575 if (chdir("include/config"))
579 for_all_symbols(i, sym) {
581 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
583 if (sym->flags & SYMBOL_WRITE) {
584 if (sym->flags & SYMBOL_DEF_AUTO) {
586 * symbol has old and new value,
592 if (sym_get_tristate_value(sym) ==
593 sym->def[S_DEF_AUTO].tri)
599 if (!strcmp(sym_get_string_value(sym),
600 sym->def[S_DEF_AUTO].val))
608 * If there is no old value, only 'no' (unset)
609 * is allowed as new value.
614 if (sym_get_tristate_value(sym) == no)
621 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
622 /* There is neither an old nor a new value. */
625 * There is an old value, but no new value ('no' (unset)
626 * isn't saved in auto.conf, so the old value is always
627 * different from 'no').
630 /* Replace all '_' and append ".h" */
635 *d++ = (c == '_') ? '/' : c;
639 /* Assume directory path already exists. */
640 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
642 if (errno != ENOENT) {
647 * Create directory components,
648 * unless they exist already.
651 while ((d = strchr(d, '/'))) {
653 if (stat(path, &sb) && mkdir(path, 0755)) {
660 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
675 int conf_write_autoconf(void)
680 FILE *out, *tristate, *out_h;
684 sym_clear_all_valid();
686 file_write_dep("include/config/auto.conf.cmd");
688 if (conf_split_config())
691 out = fopen(".tmpconfig", "w");
695 tristate = fopen(".tmpconfig_tristate", "w");
701 out_h = fopen(".tmpconfig.h", "w");
708 sym = sym_lookup("KERNELVERSION", 0);
712 "# Automatically generated make config: don't edit\n"
713 "# Linux kernel version: %s\n"
716 sym_get_string_value(sym), ctime(&now));
717 fprintf(tristate, "#\n"
718 "# Automatically generated - do not edit\n"
720 fprintf(out_h, "/*\n"
721 " * Automatically generated C config: don't edit\n"
722 " * Linux kernel version: %s\n"
725 "#define AUTOCONF_INCLUDED\n",
726 sym_get_string_value(sym), ctime(&now));
728 for_all_symbols(i, sym) {
730 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
735 switch (sym_get_tristate_value(sym)) {
739 fprintf(out, "CONFIG_%s=m\n", sym->name);
740 fprintf(tristate, "CONFIG_%s=M\n", sym->name);
741 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
744 fprintf(out, "CONFIG_%s=y\n", sym->name);
745 if (sym->type == S_TRISTATE)
746 fprintf(tristate, "CONFIG_%s=Y\n",
748 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
753 str = sym_get_string_value(sym);
754 fprintf(out, "CONFIG_%s=\"", sym->name);
755 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
757 l = strcspn(str, "\"\\");
759 fwrite(str, l, 1, out);
760 fwrite(str, l, 1, out_h);
765 fprintf(out, "\\%c", *str);
766 fprintf(out_h, "\\%c", *str);
770 fputs("\"\n", out_h);
773 str = sym_get_string_value(sym);
774 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
775 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
776 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
780 str = sym_get_string_value(sym);
781 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
782 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
792 name = getenv("KCONFIG_AUTOHEADER");
794 name = "include/generated/autoconf.h";
795 if (rename(".tmpconfig.h", name))
797 name = getenv("KCONFIG_TRISTATE");
799 name = "include/config/tristate.conf";
800 if (rename(".tmpconfig_tristate", name))
802 name = conf_get_autoconfig_name();
804 * This must be the last step, kbuild has a dependency on auto.conf
805 * and this marks the successful completion of the previous steps.
807 if (rename(".tmpconfig", name))
813 static int sym_change_count;
814 static void (*conf_changed_callback)(void);
816 void sym_set_change_count(int count)
818 int _sym_change_count = sym_change_count;
819 sym_change_count = count;
820 if (conf_changed_callback &&
821 (bool)_sym_change_count != (bool)count)
822 conf_changed_callback();
825 void sym_add_change_count(int count)
827 sym_set_change_count(count + sym_change_count);
830 bool conf_get_changed(void)
832 return sym_change_count;
835 void conf_set_changed_callback(void (*fn)(void))
837 conf_changed_callback = fn;
841 void conf_set_all_new_symbols(enum conf_def_mode mode)
843 struct symbol *sym, *csym;
844 struct property *prop;
848 for_all_symbols(i, sym) {
849 if (sym_has_value(sym))
851 switch (sym_get_type(sym)) {
856 sym->def[S_DEF_USER].tri = yes;
859 sym->def[S_DEF_USER].tri = mod;
862 sym->def[S_DEF_USER].tri = no;
865 sym->def[S_DEF_USER].tri = (tristate)(rand() % 3);
870 if (!(sym_is_choice(sym) && mode == def_random))
871 sym->flags |= SYMBOL_DEF_USER;
879 sym_clear_all_valid();
881 if (mode != def_random)
884 * We have different type of choice blocks.
885 * If curr.tri equal to mod then we can select several
886 * choice symbols in one block.
887 * In this case we do nothing.
888 * If curr.tri equal yes then only one symbol can be
889 * selected in a choice block and we set it to yes,
890 * and the rest to no.
892 for_all_symbols(i, csym) {
893 if (sym_has_value(csym) || !sym_is_choice(csym))
896 sym_calc_value(csym);
898 if (csym->curr.tri != yes)
901 prop = sym_get_choice_prop(csym);
903 /* count entries in choice block */
905 expr_list_for_each_sym(prop->expr, e, sym)
909 * find a random value and set it to yes,
910 * set the rest to no so we have only one set
912 def = (rand() % cnt);
915 expr_list_for_each_sym(prop->expr, e, sym) {
917 sym->def[S_DEF_USER].tri = yes;
918 csym->def[S_DEF_USER].val = sym;
921 sym->def[S_DEF_USER].tri = no;
924 csym->flags |= SYMBOL_DEF_USER;
925 /* clear VALID to get value calculated */
926 csym->flags &= ~(SYMBOL_VALID);