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 #define LINE_GROWTH 16
186 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
189 size_t new_size = slen + 1;
191 new_size += LINE_GROWTH - 1;
193 nline = realloc(*lineptr, new_size);
201 (*lineptr)[slen] = c;
206 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
208 char *line = *lineptr;
212 int c = getc(stream);
216 if (add_byte(c, &line, slen, n) < 0)
221 if (add_byte('\0', &line, slen, n) < 0)
228 if (add_byte(c, &line, slen, n) < 0)
240 void conf_reset(int def)
245 def_flags = SYMBOL_DEF << def;
246 for_all_symbols(i, sym) {
247 sym->flags |= SYMBOL_CHANGED;
248 sym->flags &= ~(def_flags|SYMBOL_VALID);
249 if (sym_is_choice(sym))
250 sym->flags |= def_flags;
255 if (sym->def[def].val)
256 free(sym->def[def].val);
259 sym->def[def].val = NULL;
260 sym->def[def].tri = no;
265 int conf_read_simple(const char *name, int def)
269 size_t line_asize = 0;
275 in = zconf_fopen(name);
277 struct property *prop;
279 name = conf_get_configname();
280 in = zconf_fopen(name);
283 sym_add_change_count(1);
284 if (!sym_defconfig_list) {
286 sym_calc_value(modules_sym);
290 for_all_defaults(sym_defconfig_list, prop) {
291 if (expr_calc_value(prop->visible.expr) == no ||
292 prop->expr->type != E_SYMBOL)
294 name = conf_expand_value(prop->expr->left.sym->name);
295 in = zconf_fopen(name);
297 conf_message(_("using defaults found in %s"),
307 conf_filename = name;
312 def_flags = SYMBOL_DEF << def;
315 while (compat_getline(&line, &line_asize, in) != -1) {
318 if (line[0] == '#') {
319 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
321 p = strchr(line + 2 + strlen(CONFIG_), ' ');
325 if (strncmp(p, "is not set", 10))
327 if (def == S_DEF_USER) {
328 sym = sym_find(line + 2 + strlen(CONFIG_));
330 sym_add_change_count(1);
334 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
335 if (sym->type == S_UNKNOWN)
336 sym->type = S_BOOLEAN;
341 sym->def[def].tri = no;
342 sym->flags |= def_flags;
347 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
348 p = strchr(line + strlen(CONFIG_), '=');
352 p2 = strchr(p, '\n');
358 if (def == S_DEF_USER) {
359 sym = sym_find(line + strlen(CONFIG_));
361 sym_add_change_count(1);
365 sym = sym_lookup(line + strlen(CONFIG_), 0);
366 if (sym->type == S_UNKNOWN)
369 if (conf_set_sym_val(sym, def, def_flags, p))
372 if (line[0] != '\r' && line[0] != '\n')
373 conf_warning("unexpected data");
377 if (sym && sym_is_choice_value(sym)) {
378 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
379 switch (sym->def[def].tri) {
383 if (cs->def[def].tri == yes) {
384 conf_warning("%s creates inconsistent choice state", sym->name);
385 cs->flags &= ~def_flags;
389 if (cs->def[def].tri != no)
390 conf_warning("override: %s changes choice state", sym->name);
391 cs->def[def].val = sym;
394 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
401 sym_calc_value(modules_sym);
405 int conf_read(const char *name)
410 sym_set_change_count(0);
412 if (conf_read_simple(name, S_DEF_USER))
415 for_all_symbols(i, sym) {
417 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
419 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
420 /* check that calculated value agrees with saved value */
424 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
426 if (!sym_is_choice(sym))
430 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
434 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
435 /* no previous value and not saved */
438 /* maybe print value in verbose mode... */
441 for_all_symbols(i, sym) {
442 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
443 /* Reset values of generates values, so they'll appear
444 * as new, if they should become visible, but that
445 * doesn't quite work if the Kconfig and the saved
446 * configuration disagree.
448 if (sym->visible == no && !conf_unsaved)
449 sym->flags &= ~SYMBOL_DEF_USER;
454 /* Reset a string value if it's out of range */
455 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
457 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
466 sym_add_change_count(conf_warnings || conf_unsaved);
472 * Kconfig configuration printer
474 * This printer is used when generating the resulting configuration after
475 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
476 * passing a non-NULL argument to the printer.
480 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
487 bool skip_unset = (arg != NULL);
490 fprintf(fp, "# %s%s is not set\n",
499 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
503 kconfig_print_comment(FILE *fp, const char *value, void *arg)
505 const char *p = value;
509 l = strcspn(p, "\n");
513 xfwrite(p, l, 1, fp);
522 static struct conf_printer kconfig_printer_cb =
524 .print_symbol = kconfig_print_symbol,
525 .print_comment = kconfig_print_comment,
531 * This printer is used when generating the `include/generated/autoconf.h' file.
534 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
540 const char *suffix = "";
549 fprintf(fp, "#define %s%s%s 1\n",
550 CONFIG_, sym->name, suffix);
555 const char *prefix = "";
557 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
559 fprintf(fp, "#define %s%s %s%s\n",
560 CONFIG_, sym->name, prefix, value);
565 fprintf(fp, "#define %s%s %s\n",
566 CONFIG_, sym->name, value);
575 header_print_comment(FILE *fp, const char *value, void *arg)
577 const char *p = value;
582 l = strcspn(p, "\n");
586 xfwrite(p, l, 1, fp);
593 fprintf(fp, " */\n");
596 static struct conf_printer header_printer_cb =
598 .print_symbol = header_print_symbol,
599 .print_comment = header_print_comment,
605 * This printer is used when generating the `include/config/tristate.conf' file.
608 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
611 if (sym->type == S_TRISTATE && *value != 'n')
612 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
615 static struct conf_printer tristate_printer_cb =
617 .print_symbol = tristate_print_symbol,
618 .print_comment = kconfig_print_comment,
621 static void conf_write_symbol(FILE *fp, struct symbol *sym,
622 struct conf_printer *printer, void *printer_arg)
631 str = sym_get_string_value(sym);
632 str = sym_escape_string_value(str);
633 printer->print_symbol(fp, sym, str, printer_arg);
637 str = sym_get_string_value(sym);
638 printer->print_symbol(fp, sym, str, printer_arg);
643 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
647 snprintf(buf, sizeof(buf),
649 "Automatically generated file; DO NOT EDIT.\n"
651 rootmenu.prompt->text);
653 printer->print_comment(fp, buf, printer_arg);
657 * Write out a minimal config.
658 * All values that has default values are skipped as this is redundant.
660 int conf_write_defconfig(const char *filename)
666 out = fopen(filename, "w");
670 sym_clear_all_valid();
672 /* Traverse all menus to find all relevant symbols */
673 menu = rootmenu.list;
679 if (!menu_is_visible(menu))
681 } else if (!sym_is_choice(sym)) {
683 if (!(sym->flags & SYMBOL_WRITE))
685 sym->flags &= ~SYMBOL_WRITE;
686 /* If we cannot change the symbol - skip */
687 if (!sym_is_changable(sym))
689 /* If symbol equals to default value - skip */
690 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
694 * If symbol is a choice value and equals to the
695 * default for a choice - skip.
696 * But only if value is bool and equal to "y" and
697 * choice is not "optional".
698 * (If choice is "optional" then all values can be "n")
700 if (sym_is_choice_value(sym)) {
704 cs = prop_get_symbol(sym_get_choice_prop(sym));
705 ds = sym_choice_default(cs);
706 if (!sym_is_optional(cs) && sym == ds) {
707 if ((sym->type == S_BOOLEAN) &&
708 sym_get_tristate_value(sym) == yes)
712 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
715 if (menu->list != NULL) {
718 else if (menu->next != NULL) {
721 while ((menu = menu->parent)) {
722 if (menu->next != NULL) {
733 int conf_write(const char *name)
738 const char *basename;
740 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
744 if (name && name[0]) {
748 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
749 strcpy(dirname, name);
750 strcat(dirname, "/");
751 basename = conf_get_configname();
752 } else if ((slash = strrchr(name, '/'))) {
753 int size = slash - name + 1;
754 memcpy(dirname, name, size);
757 basename = slash + 1;
759 basename = conf_get_configname();
763 basename = conf_get_configname();
765 sprintf(newname, "%s%s", dirname, basename);
766 env = getenv("KCONFIG_OVERWRITECONFIG");
768 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
769 out = fopen(tmpname, "w");
772 out = fopen(newname, "w");
777 conf_write_heading(out, &kconfig_printer_cb, NULL);
779 if (!conf_get_changed())
780 sym_clear_all_valid();
782 menu = rootmenu.list;
786 if (!menu_is_visible(menu))
788 str = menu_get_prompt(menu);
793 } else if (!(sym->flags & SYMBOL_CHOICE)) {
795 if (!(sym->flags & SYMBOL_WRITE))
797 sym->flags &= ~SYMBOL_WRITE;
799 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
809 else while ((menu = menu->parent)) {
819 strcat(dirname, basename);
820 strcat(dirname, ".old");
821 rename(newname, dirname);
822 if (rename(tmpname, newname))
826 conf_message(_("configuration written to %s"), newname);
828 sym_set_change_count(0);
833 static int conf_split_config(void)
836 char path[PATH_MAX+1];
842 name = conf_get_autoconfig_name();
843 conf_read_simple(name, S_DEF_AUTO);
845 if (chdir("include/config"))
849 for_all_symbols(i, sym) {
851 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
853 if (sym->flags & SYMBOL_WRITE) {
854 if (sym->flags & SYMBOL_DEF_AUTO) {
856 * symbol has old and new value,
862 if (sym_get_tristate_value(sym) ==
863 sym->def[S_DEF_AUTO].tri)
869 if (!strcmp(sym_get_string_value(sym),
870 sym->def[S_DEF_AUTO].val))
878 * If there is no old value, only 'no' (unset)
879 * is allowed as new value.
884 if (sym_get_tristate_value(sym) == no)
891 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
892 /* There is neither an old nor a new value. */
895 * There is an old value, but no new value ('no' (unset)
896 * isn't saved in auto.conf, so the old value is always
897 * different from 'no').
900 /* Replace all '_' and append ".h" */
905 *d++ = (c == '_') ? '/' : c;
909 /* Assume directory path already exists. */
910 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
912 if (errno != ENOENT) {
917 * Create directory components,
918 * unless they exist already.
921 while ((d = strchr(d, '/'))) {
923 if (stat(path, &sb) && mkdir(path, 0755)) {
930 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
945 int conf_write_autoconf(void)
949 FILE *out, *tristate, *out_h;
952 sym_clear_all_valid();
954 file_write_dep("include/config/auto.conf.cmd");
956 if (conf_split_config())
959 out = fopen(".tmpconfig", "w");
963 tristate = fopen(".tmpconfig_tristate", "w");
969 out_h = fopen(".tmpconfig.h", "w");
976 conf_write_heading(out, &kconfig_printer_cb, NULL);
978 conf_write_heading(tristate, &tristate_printer_cb, NULL);
980 conf_write_heading(out_h, &header_printer_cb, NULL);
982 for_all_symbols(i, sym) {
984 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
987 /* write symbol to auto.conf, tristate and header files */
988 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
990 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
992 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
998 name = getenv("KCONFIG_AUTOHEADER");
1000 name = "include/generated/autoconf.h";
1001 if (rename(".tmpconfig.h", name))
1003 name = getenv("KCONFIG_TRISTATE");
1005 name = "include/config/tristate.conf";
1006 if (rename(".tmpconfig_tristate", name))
1008 name = conf_get_autoconfig_name();
1010 * This must be the last step, kbuild has a dependency on auto.conf
1011 * and this marks the successful completion of the previous steps.
1013 if (rename(".tmpconfig", name))
1019 static int sym_change_count;
1020 static void (*conf_changed_callback)(void);
1022 void sym_set_change_count(int count)
1024 int _sym_change_count = sym_change_count;
1025 sym_change_count = count;
1026 if (conf_changed_callback &&
1027 (bool)_sym_change_count != (bool)count)
1028 conf_changed_callback();
1031 void sym_add_change_count(int count)
1033 sym_set_change_count(count + sym_change_count);
1036 bool conf_get_changed(void)
1038 return sym_change_count;
1041 void conf_set_changed_callback(void (*fn)(void))
1043 conf_changed_callback = fn;
1046 static void randomize_choice_values(struct symbol *csym)
1048 struct property *prop;
1054 * If choice is mod then we may have more items selected
1055 * and if no then no-one.
1056 * In both cases stop.
1058 if (csym->curr.tri != yes)
1061 prop = sym_get_choice_prop(csym);
1063 /* count entries in choice block */
1065 expr_list_for_each_sym(prop->expr, e, sym)
1069 * find a random value and set it to yes,
1070 * set the rest to no so we have only one set
1072 def = (rand() % cnt);
1075 expr_list_for_each_sym(prop->expr, e, sym) {
1077 sym->def[S_DEF_USER].tri = yes;
1078 csym->def[S_DEF_USER].val = sym;
1081 sym->def[S_DEF_USER].tri = no;
1084 csym->flags |= SYMBOL_DEF_USER;
1085 /* clear VALID to get value calculated */
1086 csym->flags &= ~(SYMBOL_VALID);
1089 static void set_all_choice_values(struct symbol *csym)
1091 struct property *prop;
1095 prop = sym_get_choice_prop(csym);
1098 * Set all non-assinged choice values to no
1100 expr_list_for_each_sym(prop->expr, e, sym) {
1101 if (!sym_has_value(sym))
1102 sym->def[S_DEF_USER].tri = no;
1104 csym->flags |= SYMBOL_DEF_USER;
1105 /* clear VALID to get value calculated */
1106 csym->flags &= ~(SYMBOL_VALID);
1109 void conf_set_all_new_symbols(enum conf_def_mode mode)
1111 struct symbol *sym, *csym;
1114 for_all_symbols(i, sym) {
1115 if (sym_has_value(sym))
1117 switch (sym_get_type(sym)) {
1122 sym->def[S_DEF_USER].tri = yes;
1125 sym->def[S_DEF_USER].tri = mod;
1128 sym->def[S_DEF_USER].tri = no;
1131 cnt = sym_get_type(sym) == S_TRISTATE ? 3 : 2;
1132 sym->def[S_DEF_USER].tri = (tristate)(rand() % cnt);
1137 if (!(sym_is_choice(sym) && mode == def_random))
1138 sym->flags |= SYMBOL_DEF_USER;
1146 sym_clear_all_valid();
1149 * We have different type of choice blocks.
1150 * If curr.tri equals to mod then we can select several
1151 * choice symbols in one block.
1152 * In this case we do nothing.
1153 * If curr.tri equals yes then only one symbol can be
1154 * selected in a choice block and we set it to yes,
1155 * and the rest to no.
1157 for_all_symbols(i, csym) {
1158 if (sym_has_value(csym) || !sym_is_choice(csym))
1161 sym_calc_value(csym);
1162 if (mode == def_random)
1163 randomize_choice_values(csym);
1165 set_all_choice_values(csym);