2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
19 static void conf_warning(const char *fmt, ...)
20 __attribute__ ((format (printf, 1, 2)));
22 static void conf_message(const char *fmt, ...)
23 __attribute__ ((format (printf, 1, 2)));
25 static const char *conf_filename;
26 static int conf_lineno, conf_warnings, conf_unsaved;
28 const char conf_defname[] = "arch/$ARCH/defconfig";
30 static void conf_warning(const char *fmt, ...)
34 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
35 vfprintf(stderr, fmt, ap);
36 fprintf(stderr, "\n");
41 static void conf_default_message_callback(const char *fmt, va_list ap)
48 static void (*conf_message_callback) (const char *fmt, va_list ap) =
49 conf_default_message_callback;
50 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
52 conf_message_callback = fn;
55 static void conf_message(const char *fmt, ...)
60 if (conf_message_callback)
61 conf_message_callback(fmt, ap);
64 const char *conf_get_configname(void)
66 char *name = getenv("KCONFIG_CONFIG");
68 return name ? name : ".config";
71 const char *conf_get_autoconfig_name(void)
73 char *name = getenv("KCONFIG_AUTOCONFIG");
75 return name ? name : "include/config/auto.conf";
78 static char *conf_expand_value(const char *in)
82 static char res_value[SYMBOL_MAXLENGTH];
83 char *dst, name[SYMBOL_MAXLENGTH];
87 while ((src = strchr(in, '$'))) {
88 strncat(res_value, in, src - in);
91 while (isalnum(*src) || *src == '_')
94 sym = sym_lookup(name, 0);
96 strcat(res_value, sym_get_string_value(sym));
99 strcat(res_value, in);
104 char *conf_get_default_confname(void)
107 static char fullname[PATH_MAX+1];
110 name = conf_expand_value(conf_defname);
111 env = getenv(SRCTREE);
113 sprintf(fullname, "%s/%s", env, name);
114 if (!stat(fullname, &buf))
120 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
127 sym->def[def].tri = mod;
128 sym->flags |= def_flags;
134 sym->def[def].tri = yes;
135 sym->flags |= def_flags;
139 sym->def[def].tri = no;
140 sym->flags |= def_flags;
143 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
147 for (p2 = p; *p2 && !isspace(*p2); p2++)
149 sym->type = S_STRING;
156 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
161 memmove(p2, p2 + 1, strlen(p2));
164 conf_warning("invalid string found");
171 if (sym_string_valid(sym, p)) {
172 sym->def[def].val = strdup(p);
173 sym->flags |= def_flags;
175 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
185 int conf_read_simple(const char *name, int def)
194 in = zconf_fopen(name);
196 struct property *prop;
198 name = conf_get_configname();
199 in = zconf_fopen(name);
202 sym_add_change_count(1);
203 if (!sym_defconfig_list) {
205 sym_calc_value(modules_sym);
209 for_all_defaults(sym_defconfig_list, prop) {
210 if (expr_calc_value(prop->visible.expr) == no ||
211 prop->expr->type != E_SYMBOL)
213 name = conf_expand_value(prop->expr->left.sym->name);
214 in = zconf_fopen(name);
216 conf_message(_("using defaults found in %s"),
226 conf_filename = name;
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;
241 if (sym->def[def].val)
242 free(sym->def[def].val);
245 sym->def[def].val = NULL;
246 sym->def[def].tri = no;
250 while (fgets(line, sizeof(line), in)) {
253 if (line[0] == '#') {
254 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
256 p = strchr(line + 2 + strlen(CONFIG_), ' ');
260 if (strncmp(p, "is not set", 10))
262 if (def == S_DEF_USER) {
263 sym = sym_find(line + 2 + strlen(CONFIG_));
265 sym_add_change_count(1);
269 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
270 if (sym->type == S_UNKNOWN)
271 sym->type = S_BOOLEAN;
273 if (sym->flags & def_flags) {
274 conf_warning("override: reassigning to symbol %s", sym->name);
279 sym->def[def].tri = no;
280 sym->flags |= def_flags;
285 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
286 p = strchr(line + strlen(CONFIG_), '=');
290 p2 = strchr(p, '\n');
296 if (def == S_DEF_USER) {
297 sym = sym_find(line + strlen(CONFIG_));
299 sym_add_change_count(1);
303 sym = sym_lookup(line + strlen(CONFIG_), 0);
304 if (sym->type == S_UNKNOWN)
307 if (sym->flags & def_flags) {
308 conf_warning("override: reassigning to symbol %s", sym->name);
310 if (conf_set_sym_val(sym, def, def_flags, p))
313 if (line[0] != '\r' && line[0] != '\n')
314 conf_warning("unexpected data");
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) {
324 if (cs->def[def].tri == yes) {
325 conf_warning("%s creates inconsistent choice state", sym->name);
326 cs->flags &= ~def_flags;
330 if (cs->def[def].tri != no)
331 conf_warning("override: %s changes choice state", sym->name);
332 cs->def[def].val = sym;
335 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
341 sym_calc_value(modules_sym);
345 int conf_read(const char *name)
347 struct symbol *sym, *choice_sym;
348 struct property *prop;
352 sym_set_change_count(0);
354 if (conf_read_simple(name, S_DEF_USER))
357 for_all_symbols(i, sym) {
359 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
361 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
362 /* check that calculated value agrees with saved value */
366 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
368 if (!sym_is_choice(sym))
372 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
376 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
377 /* no previous value and not saved */
380 /* maybe print value in verbose mode... */
382 if (!sym_is_choice(sym))
384 /* The choice symbol only has a set value (and thus is not new)
385 * if all its visible childs have values.
387 prop = sym_get_choice_prop(sym);
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;
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.
402 if (sym->visible == no && !conf_unsaved)
403 sym->flags &= ~SYMBOL_DEF_USER;
408 /* Reset a string value if it's out of range */
409 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
411 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
420 sym_add_change_count(conf_warnings || conf_unsaved);
426 * Kconfig configuration printer
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.
434 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
441 bool skip_unset = (arg != NULL);
444 fprintf(fp, "# %s%s is not set\n",
453 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
457 kconfig_print_comment(FILE *fp, const char *value, void *arg)
459 const char *p = value;
463 l = strcspn(p, "\n");
476 static struct conf_printer kconfig_printer_cb =
478 .print_symbol = kconfig_print_symbol,
479 .print_comment = kconfig_print_comment,
485 * This printer is used when generating the `include/generated/autoconf.h' file.
488 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
494 const char *suffix = "";
503 fprintf(fp, "#define %s%s%s 1\n",
504 CONFIG_, sym->name, suffix);
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
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'));
520 const char *prefix = "";
522 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
524 fprintf(fp, "#define %s%s %s%s\n",
525 CONFIG_, sym->name, prefix, value);
530 fprintf(fp, "#define %s%s %s\n",
531 CONFIG_, sym->name, value);
540 header_print_comment(FILE *fp, const char *value, void *arg)
542 const char *p = value;
547 l = strcspn(p, "\n");
558 fprintf(fp, " */\n");
561 static struct conf_printer header_printer_cb =
563 .print_symbol = header_print_symbol,
564 .print_comment = header_print_comment,
570 * This printer is used when generating the `include/config/tristate.conf' file.
573 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
576 if (sym->type == S_TRISTATE && *value != 'n')
577 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
580 static struct conf_printer tristate_printer_cb =
582 .print_symbol = tristate_print_symbol,
583 .print_comment = kconfig_print_comment,
586 static void conf_write_symbol(FILE *fp, struct symbol *sym,
587 struct conf_printer *printer, void *printer_arg)
596 str = sym_get_string_value(sym);
597 str = sym_escape_string_value(str);
598 printer->print_symbol(fp, sym, str, printer_arg);
602 str = sym_get_string_value(sym);
603 printer->print_symbol(fp, sym, str, printer_arg);
608 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
612 snprintf(buf, sizeof(buf),
614 "Automatically generated file; DO NOT EDIT.\n"
616 rootmenu.prompt->text);
618 printer->print_comment(fp, buf, printer_arg);
622 * Write out a minimal config.
623 * All values that has default values are skipped as this is redundant.
625 int conf_write_defconfig(const char *filename)
631 out = fopen(filename, "w");
635 sym_clear_all_valid();
637 /* Traverse all menus to find all relevant symbols */
638 menu = rootmenu.list;
644 if (!menu_is_visible(menu))
646 } else if (!sym_is_choice(sym)) {
648 if (!(sym->flags & SYMBOL_WRITE))
650 sym->flags &= ~SYMBOL_WRITE;
651 /* If we cannot change the symbol - skip */
652 if (!sym_is_changable(sym))
654 /* If symbol equals to default value - skip */
655 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
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")
665 if (sym_is_choice_value(sym)) {
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)
677 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
680 if (menu->list != NULL) {
683 else if (menu->next != NULL) {
686 while ((menu = menu->parent)) {
687 if (menu->next != NULL) {
698 int conf_write(const char *name)
703 const char *basename;
705 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
709 if (name && name[0]) {
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);
722 basename = slash + 1;
724 basename = conf_get_configname();
728 basename = conf_get_configname();
730 sprintf(newname, "%s%s", dirname, basename);
731 env = getenv("KCONFIG_OVERWRITECONFIG");
733 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
734 out = fopen(tmpname, "w");
737 out = fopen(newname, "w");
742 conf_write_heading(out, &kconfig_printer_cb, NULL);
744 if (!conf_get_changed())
745 sym_clear_all_valid();
747 menu = rootmenu.list;
751 if (!menu_is_visible(menu))
753 str = menu_get_prompt(menu);
758 } else if (!(sym->flags & SYMBOL_CHOICE)) {
760 if (!(sym->flags & SYMBOL_WRITE))
762 sym->flags &= ~SYMBOL_WRITE;
764 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
774 else while ((menu = menu->parent)) {
784 strcat(dirname, basename);
785 strcat(dirname, ".old");
786 rename(newname, dirname);
787 if (rename(tmpname, newname))
791 conf_message(_("configuration written to %s"), newname);
793 sym_set_change_count(0);
798 static int conf_split_config(void)
801 char path[PATH_MAX+1];
807 name = conf_get_autoconfig_name();
808 conf_read_simple(name, S_DEF_AUTO);
810 if (chdir("include/config"))
814 for_all_symbols(i, sym) {
816 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
818 if (sym->flags & SYMBOL_WRITE) {
819 if (sym->flags & SYMBOL_DEF_AUTO) {
821 * symbol has old and new value,
827 if (sym_get_tristate_value(sym) ==
828 sym->def[S_DEF_AUTO].tri)
834 if (!strcmp(sym_get_string_value(sym),
835 sym->def[S_DEF_AUTO].val))
843 * If there is no old value, only 'no' (unset)
844 * is allowed as new value.
849 if (sym_get_tristate_value(sym) == no)
856 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
857 /* There is neither an old nor a new value. */
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').
865 /* Replace all '_' and append ".h" */
870 *d++ = (c == '_') ? '/' : c;
874 /* Assume directory path already exists. */
875 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
877 if (errno != ENOENT) {
882 * Create directory components,
883 * unless they exist already.
886 while ((d = strchr(d, '/'))) {
888 if (stat(path, &sb) && mkdir(path, 0755)) {
895 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
910 int conf_write_autoconf(void)
914 FILE *out, *tristate, *out_h;
917 sym_clear_all_valid();
919 file_write_dep("include/config/auto.conf.cmd");
921 if (conf_split_config())
924 out = fopen(".tmpconfig", "w");
928 tristate = fopen(".tmpconfig_tristate", "w");
934 out_h = fopen(".tmpconfig.h", "w");
941 conf_write_heading(out, &kconfig_printer_cb, NULL);
943 conf_write_heading(tristate, &tristate_printer_cb, NULL);
945 conf_write_heading(out_h, &header_printer_cb, NULL);
947 for_all_symbols(i, sym) {
949 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
952 /* write symbol to auto.conf, tristate and header files */
953 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
955 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
957 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
963 name = getenv("KCONFIG_AUTOHEADER");
965 name = "include/generated/autoconf.h";
966 if (rename(".tmpconfig.h", name))
968 name = getenv("KCONFIG_TRISTATE");
970 name = "include/config/tristate.conf";
971 if (rename(".tmpconfig_tristate", name))
973 name = conf_get_autoconfig_name();
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.
978 if (rename(".tmpconfig", name))
984 static int sym_change_count;
985 static void (*conf_changed_callback)(void);
987 void sym_set_change_count(int count)
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();
996 void sym_add_change_count(int count)
998 sym_set_change_count(count + sym_change_count);
1001 bool conf_get_changed(void)
1003 return sym_change_count;
1006 void conf_set_changed_callback(void (*fn)(void))
1008 conf_changed_callback = fn;
1011 static void randomize_choice_values(struct symbol *csym)
1013 struct property *prop;
1019 * If choice is mod then we may have more items selected
1020 * and if no then no-one.
1021 * In both cases stop.
1023 if (csym->curr.tri != yes)
1026 prop = sym_get_choice_prop(csym);
1028 /* count entries in choice block */
1030 expr_list_for_each_sym(prop->expr, e, sym)
1034 * find a random value and set it to yes,
1035 * set the rest to no so we have only one set
1037 def = (rand() % cnt);
1040 expr_list_for_each_sym(prop->expr, e, sym) {
1042 sym->def[S_DEF_USER].tri = yes;
1043 csym->def[S_DEF_USER].val = sym;
1046 sym->def[S_DEF_USER].tri = no;
1049 csym->flags |= SYMBOL_DEF_USER;
1050 /* clear VALID to get value calculated */
1051 csym->flags &= ~(SYMBOL_VALID);
1054 static void set_all_choice_values(struct symbol *csym)
1056 struct property *prop;
1060 prop = sym_get_choice_prop(csym);
1063 * Set all non-assinged choice values to no
1065 expr_list_for_each_sym(prop->expr, e, sym) {
1066 if (!sym_has_value(sym))
1067 sym->def[S_DEF_USER].tri = no;
1069 csym->flags |= SYMBOL_DEF_USER;
1070 /* clear VALID to get value calculated */
1071 csym->flags &= ~(SYMBOL_VALID);
1074 void conf_set_all_new_symbols(enum conf_def_mode mode)
1076 struct symbol *sym, *csym;
1079 for_all_symbols(i, sym) {
1080 if (sym_has_value(sym))
1082 switch (sym_get_type(sym)) {
1087 sym->def[S_DEF_USER].tri = yes;
1090 sym->def[S_DEF_USER].tri = mod;
1093 sym->def[S_DEF_USER].tri = no;
1096 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1097 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1102 if (!(sym_is_choice(sym) && mode == def_random))
1103 sym->flags |= SYMBOL_DEF_USER;
1111 sym_clear_all_valid();
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.
1122 for_all_symbols(i, csym) {
1123 if (sym_has_value(csym) || !sym_is_choice(csym))
1126 sym_calc_value(csym);
1127 if (mode == def_random)
1128 randomize_choice_values(csym);
1130 set_all_choice_values(csym);