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)
350 sym_set_change_count(0);
352 if (conf_read_simple(name, S_DEF_USER))
355 for_all_symbols(i, sym) {
357 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
359 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
360 /* check that calculated value agrees with saved value */
364 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
366 if (!sym_is_choice(sym))
370 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
374 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
375 /* no previous value and not saved */
378 /* maybe print value in verbose mode... */
381 for_all_symbols(i, sym) {
382 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
383 /* Reset values of generates values, so they'll appear
384 * as new, if they should become visible, but that
385 * doesn't quite work if the Kconfig and the saved
386 * configuration disagree.
388 if (sym->visible == no && !conf_unsaved)
389 sym->flags &= ~SYMBOL_DEF_USER;
394 /* Reset a string value if it's out of range */
395 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
397 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
406 sym_add_change_count(conf_warnings || conf_unsaved);
412 * Kconfig configuration printer
414 * This printer is used when generating the resulting configuration after
415 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
416 * passing a non-NULL argument to the printer.
420 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
427 bool skip_unset = (arg != NULL);
430 fprintf(fp, "# %s%s is not set\n",
439 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
443 kconfig_print_comment(FILE *fp, const char *value, void *arg)
445 const char *p = value;
449 l = strcspn(p, "\n");
453 xfwrite(p, l, 1, fp);
462 static struct conf_printer kconfig_printer_cb =
464 .print_symbol = kconfig_print_symbol,
465 .print_comment = kconfig_print_comment,
471 * This printer is used when generating the `include/generated/autoconf.h' file.
474 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
480 const char *suffix = "";
489 fprintf(fp, "#define %s%s%s 1\n",
490 CONFIG_, sym->name, suffix);
495 const char *prefix = "";
497 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
499 fprintf(fp, "#define %s%s %s%s\n",
500 CONFIG_, sym->name, prefix, value);
505 fprintf(fp, "#define %s%s %s\n",
506 CONFIG_, sym->name, value);
515 header_print_comment(FILE *fp, const char *value, void *arg)
517 const char *p = value;
522 l = strcspn(p, "\n");
526 xfwrite(p, l, 1, fp);
533 fprintf(fp, " */\n");
536 static struct conf_printer header_printer_cb =
538 .print_symbol = header_print_symbol,
539 .print_comment = header_print_comment,
543 * Generate the __enabled_CONFIG_* and __enabled_CONFIG_*_MODULE macros for
544 * use by the IS_{ENABLED,BUILTIN,MODULE} macros. The _MODULE variant is
545 * generated even for booleans so that the IS_ENABLED() macro works.
548 header_print__enabled_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
554 fprintf(fp, "#define __enabled_" CONFIG_ "%s %d\n",
555 sym->name, (*value == 'y'));
556 fprintf(fp, "#define __enabled_" CONFIG_ "%s_MODULE %d\n",
557 sym->name, (*value == 'm'));
565 static struct conf_printer header__enabled_printer_cb =
567 .print_symbol = header_print__enabled_symbol,
568 .print_comment = header_print_comment,
574 * This printer is used when generating the `include/config/tristate.conf' file.
577 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
580 if (sym->type == S_TRISTATE && *value != 'n')
581 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
584 static struct conf_printer tristate_printer_cb =
586 .print_symbol = tristate_print_symbol,
587 .print_comment = kconfig_print_comment,
590 static void conf_write_symbol(FILE *fp, struct symbol *sym,
591 struct conf_printer *printer, void *printer_arg)
600 str = sym_get_string_value(sym);
601 str = sym_escape_string_value(str);
602 printer->print_symbol(fp, sym, str, printer_arg);
606 str = sym_get_string_value(sym);
607 printer->print_symbol(fp, sym, str, printer_arg);
612 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
616 snprintf(buf, sizeof(buf),
618 "Automatically generated file; DO NOT EDIT.\n"
620 rootmenu.prompt->text);
622 printer->print_comment(fp, buf, printer_arg);
626 * Write out a minimal config.
627 * All values that has default values are skipped as this is redundant.
629 int conf_write_defconfig(const char *filename)
635 out = fopen(filename, "w");
639 sym_clear_all_valid();
641 /* Traverse all menus to find all relevant symbols */
642 menu = rootmenu.list;
648 if (!menu_is_visible(menu))
650 } else if (!sym_is_choice(sym)) {
652 if (!(sym->flags & SYMBOL_WRITE))
654 sym->flags &= ~SYMBOL_WRITE;
655 /* If we cannot change the symbol - skip */
656 if (!sym_is_changable(sym))
658 /* If symbol equals to default value - skip */
659 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
663 * If symbol is a choice value and equals to the
664 * default for a choice - skip.
665 * But only if value is bool and equal to "y" and
666 * choice is not "optional".
667 * (If choice is "optional" then all values can be "n")
669 if (sym_is_choice_value(sym)) {
673 cs = prop_get_symbol(sym_get_choice_prop(sym));
674 ds = sym_choice_default(cs);
675 if (!sym_is_optional(cs) && sym == ds) {
676 if ((sym->type == S_BOOLEAN) &&
677 sym_get_tristate_value(sym) == yes)
681 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
684 if (menu->list != NULL) {
687 else if (menu->next != NULL) {
690 while ((menu = menu->parent)) {
691 if (menu->next != NULL) {
702 int conf_write(const char *name)
707 const char *basename;
709 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
713 if (name && name[0]) {
717 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
718 strcpy(dirname, name);
719 strcat(dirname, "/");
720 basename = conf_get_configname();
721 } else if ((slash = strrchr(name, '/'))) {
722 int size = slash - name + 1;
723 memcpy(dirname, name, size);
726 basename = slash + 1;
728 basename = conf_get_configname();
732 basename = conf_get_configname();
734 sprintf(newname, "%s%s", dirname, basename);
735 env = getenv("KCONFIG_OVERWRITECONFIG");
737 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
738 out = fopen(tmpname, "w");
741 out = fopen(newname, "w");
746 conf_write_heading(out, &kconfig_printer_cb, NULL);
748 if (!conf_get_changed())
749 sym_clear_all_valid();
751 menu = rootmenu.list;
755 if (!menu_is_visible(menu))
757 str = menu_get_prompt(menu);
762 } else if (!(sym->flags & SYMBOL_CHOICE)) {
764 if (!(sym->flags & SYMBOL_WRITE))
766 sym->flags &= ~SYMBOL_WRITE;
768 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
778 else while ((menu = menu->parent)) {
788 strcat(dirname, basename);
789 strcat(dirname, ".old");
790 rename(newname, dirname);
791 if (rename(tmpname, newname))
795 conf_message(_("configuration written to %s"), newname);
797 sym_set_change_count(0);
802 static int conf_split_config(void)
805 char path[PATH_MAX+1];
811 name = conf_get_autoconfig_name();
812 conf_read_simple(name, S_DEF_AUTO);
814 if (chdir("include/config"))
818 for_all_symbols(i, sym) {
820 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
822 if (sym->flags & SYMBOL_WRITE) {
823 if (sym->flags & SYMBOL_DEF_AUTO) {
825 * symbol has old and new value,
831 if (sym_get_tristate_value(sym) ==
832 sym->def[S_DEF_AUTO].tri)
838 if (!strcmp(sym_get_string_value(sym),
839 sym->def[S_DEF_AUTO].val))
847 * If there is no old value, only 'no' (unset)
848 * is allowed as new value.
853 if (sym_get_tristate_value(sym) == no)
860 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
861 /* There is neither an old nor a new value. */
864 * There is an old value, but no new value ('no' (unset)
865 * isn't saved in auto.conf, so the old value is always
866 * different from 'no').
869 /* Replace all '_' and append ".h" */
874 *d++ = (c == '_') ? '/' : c;
878 /* Assume directory path already exists. */
879 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
881 if (errno != ENOENT) {
886 * Create directory components,
887 * unless they exist already.
890 while ((d = strchr(d, '/'))) {
892 if (stat(path, &sb) && mkdir(path, 0755)) {
899 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
914 int conf_write_autoconf(void)
918 FILE *out, *tristate, *out_h;
921 sym_clear_all_valid();
923 file_write_dep("include/config/auto.conf.cmd");
925 if (conf_split_config())
928 out = fopen(".tmpconfig", "w");
932 tristate = fopen(".tmpconfig_tristate", "w");
938 out_h = fopen(".tmpconfig.h", "w");
945 conf_write_heading(out, &kconfig_printer_cb, NULL);
947 conf_write_heading(tristate, &tristate_printer_cb, NULL);
949 conf_write_heading(out_h, &header_printer_cb, NULL);
951 for_all_symbols(i, sym) {
957 conf_write_symbol(out_h, sym, &header__enabled_printer_cb, NULL);
959 if (!(sym->flags & SYMBOL_WRITE))
962 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
964 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
966 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
972 name = getenv("KCONFIG_AUTOHEADER");
974 name = "include/generated/autoconf.h";
975 if (rename(".tmpconfig.h", name))
977 name = getenv("KCONFIG_TRISTATE");
979 name = "include/config/tristate.conf";
980 if (rename(".tmpconfig_tristate", name))
982 name = conf_get_autoconfig_name();
984 * This must be the last step, kbuild has a dependency on auto.conf
985 * and this marks the successful completion of the previous steps.
987 if (rename(".tmpconfig", name))
993 static int sym_change_count;
994 static void (*conf_changed_callback)(void);
996 void sym_set_change_count(int count)
998 int _sym_change_count = sym_change_count;
999 sym_change_count = count;
1000 if (conf_changed_callback &&
1001 (bool)_sym_change_count != (bool)count)
1002 conf_changed_callback();
1005 void sym_add_change_count(int count)
1007 sym_set_change_count(count + sym_change_count);
1010 bool conf_get_changed(void)
1012 return sym_change_count;
1015 void conf_set_changed_callback(void (*fn)(void))
1017 conf_changed_callback = fn;
1020 static void randomize_choice_values(struct symbol *csym)
1022 struct property *prop;
1028 * If choice is mod then we may have more items selected
1029 * and if no then no-one.
1030 * In both cases stop.
1032 if (csym->curr.tri != yes)
1035 prop = sym_get_choice_prop(csym);
1037 /* count entries in choice block */
1039 expr_list_for_each_sym(prop->expr, e, sym)
1043 * find a random value and set it to yes,
1044 * set the rest to no so we have only one set
1046 def = (rand() % cnt);
1049 expr_list_for_each_sym(prop->expr, e, sym) {
1051 sym->def[S_DEF_USER].tri = yes;
1052 csym->def[S_DEF_USER].val = sym;
1055 sym->def[S_DEF_USER].tri = no;
1058 csym->flags |= SYMBOL_DEF_USER;
1059 /* clear VALID to get value calculated */
1060 csym->flags &= ~(SYMBOL_VALID);
1063 static void set_all_choice_values(struct symbol *csym)
1065 struct property *prop;
1069 prop = sym_get_choice_prop(csym);
1072 * Set all non-assinged choice values to no
1074 expr_list_for_each_sym(prop->expr, e, sym) {
1075 if (!sym_has_value(sym))
1076 sym->def[S_DEF_USER].tri = no;
1078 csym->flags |= SYMBOL_DEF_USER;
1079 /* clear VALID to get value calculated */
1080 csym->flags &= ~(SYMBOL_VALID);
1083 void conf_set_all_new_symbols(enum conf_def_mode mode)
1085 struct symbol *sym, *csym;
1088 for_all_symbols(i, sym) {
1089 if (sym_has_value(sym))
1091 switch (sym_get_type(sym)) {
1096 sym->def[S_DEF_USER].tri = yes;
1099 sym->def[S_DEF_USER].tri = mod;
1102 sym->def[S_DEF_USER].tri = no;
1105 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1106 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1111 if (!(sym_is_choice(sym) && mode == def_random))
1112 sym->flags |= SYMBOL_DEF_USER;
1120 sym_clear_all_valid();
1123 * We have different type of choice blocks.
1124 * If curr.tri equals to mod then we can select several
1125 * choice symbols in one block.
1126 * In this case we do nothing.
1127 * If curr.tri equals yes then only one symbol can be
1128 * selected in a choice block and we set it to yes,
1129 * and the rest to no.
1131 for_all_symbols(i, csym) {
1132 if (sym_has_value(csym) || !sym_is_choice(csym))
1135 sym_calc_value(csym);
1136 if (mode == def_random)
1137 randomize_choice_values(csym);
1139 set_all_choice_values(csym);