2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
20 void (*print_symbol)(FILE *, struct symbol *, const char *, void *);
21 void (*print_comment)(FILE *, const char *, void *);
24 static void conf_warning(const char *fmt, ...)
25 __attribute__ ((format (printf, 1, 2)));
27 static void conf_message(const char *fmt, ...)
28 __attribute__ ((format (printf, 1, 2)));
30 static const char *conf_filename;
31 static int conf_lineno, conf_warnings;
33 const char conf_defname[] = "arch/$(ARCH)/defconfig";
35 static void conf_warning(const char *fmt, ...)
39 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
40 vfprintf(stderr, fmt, ap);
41 fprintf(stderr, "\n");
46 static void conf_default_message_callback(const char *fmt, va_list ap)
53 static void (*conf_message_callback) (const char *fmt, va_list ap) =
54 conf_default_message_callback;
55 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
57 conf_message_callback = fn;
60 static void conf_message(const char *fmt, ...)
65 if (conf_message_callback)
66 conf_message_callback(fmt, ap);
70 const char *conf_get_configname(void)
72 char *name = getenv("KCONFIG_CONFIG");
74 return name ? name : ".config";
77 const char *conf_get_autoconfig_name(void)
79 char *name = getenv("KCONFIG_AUTOCONFIG");
81 return name ? name : "include/config/auto.conf";
84 char *conf_get_default_confname(void)
87 static char fullname[PATH_MAX+1];
90 name = expand_string(conf_defname);
91 env = getenv(SRCTREE);
93 sprintf(fullname, "%s/%s", env, name);
94 if (!stat(fullname, &buf))
100 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
107 sym->def[def].tri = mod;
108 sym->flags |= def_flags;
114 sym->def[def].tri = yes;
115 sym->flags |= def_flags;
119 sym->def[def].tri = no;
120 sym->flags |= def_flags;
123 if (def != S_DEF_AUTO)
124 conf_warning("symbol value '%s' invalid for %s",
129 for (p2 = p; *p2 && !isspace(*p2); p2++)
131 sym->type = S_STRING;
138 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
143 memmove(p2, p2 + 1, strlen(p2));
146 if (def != S_DEF_AUTO)
147 conf_warning("invalid string found");
154 if (sym_string_valid(sym, p)) {
155 sym->def[def].val = xstrdup(p);
156 sym->flags |= def_flags;
158 if (def != S_DEF_AUTO)
159 conf_warning("symbol value '%s' invalid for %s",
170 #define LINE_GROWTH 16
171 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
174 size_t new_size = slen + 1;
176 new_size += LINE_GROWTH - 1;
178 nline = xrealloc(*lineptr, new_size);
186 (*lineptr)[slen] = c;
191 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
193 char *line = *lineptr;
197 int c = getc(stream);
201 if (add_byte(c, &line, slen, n) < 0)
206 if (add_byte('\0', &line, slen, n) < 0)
213 if (add_byte(c, &line, slen, n) < 0)
225 int conf_read_simple(const char *name, int def)
229 size_t line_asize = 0;
235 in = zconf_fopen(name);
237 struct property *prop;
239 name = conf_get_configname();
240 in = zconf_fopen(name);
243 sym_add_change_count(1);
244 if (!sym_defconfig_list)
247 for_all_defaults(sym_defconfig_list, prop) {
248 if (expr_calc_value(prop->visible.expr) == no ||
249 prop->expr->type != E_SYMBOL)
251 sym_calc_value(prop->expr->left.sym);
252 name = sym_get_string_value(prop->expr->left.sym);
253 in = zconf_fopen(name);
255 conf_message("using defaults found in %s",
265 conf_filename = name;
269 def_flags = SYMBOL_DEF << def;
270 for_all_symbols(i, sym) {
271 sym->flags |= SYMBOL_CHANGED;
272 sym->flags &= ~(def_flags|SYMBOL_VALID);
273 if (sym_is_choice(sym))
274 sym->flags |= def_flags;
279 if (sym->def[def].val)
280 free(sym->def[def].val);
283 sym->def[def].val = NULL;
284 sym->def[def].tri = no;
288 while (compat_getline(&line, &line_asize, in) != -1) {
291 if (line[0] == '#') {
292 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
294 p = strchr(line + 2 + strlen(CONFIG_), ' ');
298 if (strncmp(p, "is not set", 10))
300 if (def == S_DEF_USER) {
301 sym = sym_find(line + 2 + strlen(CONFIG_));
303 sym_add_change_count(1);
307 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
308 if (sym->type == S_UNKNOWN)
309 sym->type = S_BOOLEAN;
311 if (sym->flags & def_flags) {
312 conf_warning("override: reassigning to symbol %s", sym->name);
317 sym->def[def].tri = no;
318 sym->flags |= def_flags;
323 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
324 p = strchr(line + strlen(CONFIG_), '=');
328 p2 = strchr(p, '\n');
334 if (def == S_DEF_USER) {
335 sym = sym_find(line + strlen(CONFIG_));
337 sym_add_change_count(1);
341 sym = sym_lookup(line + strlen(CONFIG_), 0);
342 if (sym->type == S_UNKNOWN)
345 if (sym->flags & def_flags) {
346 conf_warning("override: reassigning to symbol %s", sym->name);
348 if (conf_set_sym_val(sym, def, def_flags, p))
351 if (line[0] != '\r' && line[0] != '\n')
352 conf_warning("unexpected data: %.*s",
353 (int)strcspn(line, "\r\n"), line);
358 if (sym && sym_is_choice_value(sym)) {
359 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
360 switch (sym->def[def].tri) {
364 if (cs->def[def].tri == yes) {
365 conf_warning("%s creates inconsistent choice state", sym->name);
366 cs->flags &= ~def_flags;
370 if (cs->def[def].tri != no)
371 conf_warning("override: %s changes choice state", sym->name);
372 cs->def[def].val = sym;
375 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
383 int conf_read(const char *name)
386 int conf_unsaved = 0;
389 sym_set_change_count(0);
391 if (conf_read_simple(name, S_DEF_USER)) {
392 sym_calc_value(modules_sym);
396 sym_calc_value(modules_sym);
398 for_all_symbols(i, sym) {
400 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
402 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
403 /* check that calculated value agrees with saved value */
407 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
409 if (!sym_is_choice(sym))
413 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
417 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
418 /* no previous value and not saved */
421 /* maybe print value in verbose mode... */
424 for_all_symbols(i, sym) {
425 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
426 /* Reset values of generates values, so they'll appear
427 * as new, if they should become visible, but that
428 * doesn't quite work if the Kconfig and the saved
429 * configuration disagree.
431 if (sym->visible == no && !conf_unsaved)
432 sym->flags &= ~SYMBOL_DEF_USER;
437 /* Reset a string value if it's out of range */
438 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
440 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
449 sym_add_change_count(conf_warnings || conf_unsaved);
455 * Kconfig configuration printer
457 * This printer is used when generating the resulting configuration after
458 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
459 * passing a non-NULL argument to the printer.
463 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
470 bool skip_unset = (arg != NULL);
473 fprintf(fp, "# %s%s is not set\n",
482 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
486 kconfig_print_comment(FILE *fp, const char *value, void *arg)
488 const char *p = value;
492 l = strcspn(p, "\n");
496 xfwrite(p, l, 1, fp);
505 static struct conf_printer kconfig_printer_cb =
507 .print_symbol = kconfig_print_symbol,
508 .print_comment = kconfig_print_comment,
514 * This printer is used when generating the `include/generated/autoconf.h' file.
517 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
523 const char *suffix = "";
532 fprintf(fp, "#define %s%s%s 1\n",
533 CONFIG_, sym->name, suffix);
538 const char *prefix = "";
540 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
542 fprintf(fp, "#define %s%s %s%s\n",
543 CONFIG_, sym->name, prefix, value);
548 fprintf(fp, "#define %s%s %s\n",
549 CONFIG_, sym->name, value);
558 header_print_comment(FILE *fp, const char *value, void *arg)
560 const char *p = value;
565 l = strcspn(p, "\n");
569 xfwrite(p, l, 1, fp);
576 fprintf(fp, " */\n");
579 static struct conf_printer header_printer_cb =
581 .print_symbol = header_print_symbol,
582 .print_comment = header_print_comment,
588 * This printer is used when generating the `include/config/tristate.conf' file.
591 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
594 if (sym->type == S_TRISTATE && *value != 'n')
595 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
598 static struct conf_printer tristate_printer_cb =
600 .print_symbol = tristate_print_symbol,
601 .print_comment = kconfig_print_comment,
604 static void conf_write_symbol(FILE *fp, struct symbol *sym,
605 struct conf_printer *printer, void *printer_arg)
614 str = sym_get_string_value(sym);
615 str = sym_escape_string_value(str);
616 printer->print_symbol(fp, sym, str, printer_arg);
620 str = sym_get_string_value(sym);
621 printer->print_symbol(fp, sym, str, printer_arg);
626 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
630 snprintf(buf, sizeof(buf),
632 "Automatically generated file; DO NOT EDIT.\n"
634 rootmenu.prompt->text);
636 printer->print_comment(fp, buf, printer_arg);
640 * Write out a minimal config.
641 * All values that has default values are skipped as this is redundant.
643 int conf_write_defconfig(const char *filename)
649 out = fopen(filename, "w");
653 sym_clear_all_valid();
655 /* Traverse all menus to find all relevant symbols */
656 menu = rootmenu.list;
662 if (!menu_is_visible(menu))
664 } else if (!sym_is_choice(sym)) {
666 if (!(sym->flags & SYMBOL_WRITE))
668 sym->flags &= ~SYMBOL_WRITE;
669 /* If we cannot change the symbol - skip */
670 if (!sym_is_changable(sym))
672 /* If symbol equals to default value - skip */
673 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
677 * If symbol is a choice value and equals to the
678 * default for a choice - skip.
679 * But only if value is bool and equal to "y" and
680 * choice is not "optional".
681 * (If choice is "optional" then all values can be "n")
683 if (sym_is_choice_value(sym)) {
687 cs = prop_get_symbol(sym_get_choice_prop(sym));
688 ds = sym_choice_default(cs);
689 if (!sym_is_optional(cs) && sym == ds) {
690 if ((sym->type == S_BOOLEAN) &&
691 sym_get_tristate_value(sym) == yes)
695 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
698 if (menu->list != NULL) {
701 else if (menu->next != NULL) {
704 while ((menu = menu->parent)) {
705 if (menu->next != NULL) {
716 int conf_write(const char *name)
721 const char *basename;
723 char dirname[PATH_MAX+1], tmpname[PATH_MAX+22], newname[PATH_MAX+8];
727 if (name && name[0]) {
731 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
732 strcpy(dirname, name);
733 strcat(dirname, "/");
734 basename = conf_get_configname();
735 } else if ((slash = strrchr(name, '/'))) {
736 int size = slash - name + 1;
737 memcpy(dirname, name, size);
740 basename = slash + 1;
742 basename = conf_get_configname();
746 basename = conf_get_configname();
748 sprintf(newname, "%s%s", dirname, basename);
749 env = getenv("KCONFIG_OVERWRITECONFIG");
751 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
752 out = fopen(tmpname, "w");
755 out = fopen(newname, "w");
760 conf_write_heading(out, &kconfig_printer_cb, NULL);
762 if (!conf_get_changed())
763 sym_clear_all_valid();
765 menu = rootmenu.list;
769 if (!menu_is_visible(menu))
771 str = menu_get_prompt(menu);
776 } else if (!(sym->flags & SYMBOL_CHOICE)) {
778 if (!(sym->flags & SYMBOL_WRITE))
780 sym->flags &= ~SYMBOL_WRITE;
782 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
792 else while ((menu = menu->parent)) {
802 strcat(dirname, basename);
803 strcat(dirname, ".old");
804 rename(newname, dirname);
805 if (rename(tmpname, newname))
809 conf_message("configuration written to %s", newname);
811 sym_set_change_count(0);
816 static int conf_split_config(void)
819 char path[PATH_MAX+1];
825 name = conf_get_autoconfig_name();
826 conf_read_simple(name, S_DEF_AUTO);
827 sym_calc_value(modules_sym);
829 if (chdir("include/config"))
833 for_all_symbols(i, sym) {
835 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
837 if (sym->flags & SYMBOL_WRITE) {
838 if (sym->flags & SYMBOL_DEF_AUTO) {
840 * symbol has old and new value,
846 if (sym_get_tristate_value(sym) ==
847 sym->def[S_DEF_AUTO].tri)
853 if (!strcmp(sym_get_string_value(sym),
854 sym->def[S_DEF_AUTO].val))
862 * If there is no old value, only 'no' (unset)
863 * is allowed as new value.
868 if (sym_get_tristate_value(sym) == no)
875 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
876 /* There is neither an old nor a new value. */
879 * There is an old value, but no new value ('no' (unset)
880 * isn't saved in auto.conf, so the old value is always
881 * different from 'no').
884 /* Replace all '_' and append ".h" */
889 *d++ = (c == '_') ? '/' : c;
893 /* Assume directory path already exists. */
894 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
896 if (errno != ENOENT) {
901 * Create directory components,
902 * unless they exist already.
905 while ((d = strchr(d, '/'))) {
907 if (stat(path, &sb) && mkdir(path, 0755)) {
914 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
929 int conf_write_autoconf(void)
933 FILE *out, *tristate, *out_h;
936 sym_clear_all_valid();
938 file_write_dep("include/config/auto.conf.cmd");
940 if (conf_split_config())
943 out = fopen(".tmpconfig", "w");
947 tristate = fopen(".tmpconfig_tristate", "w");
953 out_h = fopen(".tmpconfig.h", "w");
960 conf_write_heading(out, &kconfig_printer_cb, NULL);
962 conf_write_heading(tristate, &tristate_printer_cb, NULL);
964 conf_write_heading(out_h, &header_printer_cb, NULL);
966 for_all_symbols(i, sym) {
968 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
971 /* write symbol to auto.conf, tristate and header files */
972 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
974 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
976 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
982 name = getenv("KCONFIG_AUTOHEADER");
984 name = "include/generated/autoconf.h";
985 if (rename(".tmpconfig.h", name))
987 name = getenv("KCONFIG_TRISTATE");
989 name = "include/config/tristate.conf";
990 if (rename(".tmpconfig_tristate", name))
992 name = conf_get_autoconfig_name();
994 * This must be the last step, kbuild has a dependency on auto.conf
995 * and this marks the successful completion of the previous steps.
997 if (rename(".tmpconfig", name))
1003 static int sym_change_count;
1004 static void (*conf_changed_callback)(void);
1006 void sym_set_change_count(int count)
1008 int _sym_change_count = sym_change_count;
1009 sym_change_count = count;
1010 if (conf_changed_callback &&
1011 (bool)_sym_change_count != (bool)count)
1012 conf_changed_callback();
1015 void sym_add_change_count(int count)
1017 sym_set_change_count(count + sym_change_count);
1020 bool conf_get_changed(void)
1022 return sym_change_count;
1025 void conf_set_changed_callback(void (*fn)(void))
1027 conf_changed_callback = fn;
1030 static bool randomize_choice_values(struct symbol *csym)
1032 struct property *prop;
1038 * If choice is mod then we may have more items selected
1039 * and if no then no-one.
1040 * In both cases stop.
1042 if (csym->curr.tri != yes)
1045 prop = sym_get_choice_prop(csym);
1047 /* count entries in choice block */
1049 expr_list_for_each_sym(prop->expr, e, sym)
1053 * find a random value and set it to yes,
1054 * set the rest to no so we have only one set
1056 def = (rand() % cnt);
1059 expr_list_for_each_sym(prop->expr, e, sym) {
1061 sym->def[S_DEF_USER].tri = yes;
1062 csym->def[S_DEF_USER].val = sym;
1065 sym->def[S_DEF_USER].tri = no;
1067 sym->flags |= SYMBOL_DEF_USER;
1068 /* clear VALID to get value calculated */
1069 sym->flags &= ~SYMBOL_VALID;
1071 csym->flags |= SYMBOL_DEF_USER;
1072 /* clear VALID to get value calculated */
1073 csym->flags &= ~(SYMBOL_VALID);
1078 void set_all_choice_values(struct symbol *csym)
1080 struct property *prop;
1084 prop = sym_get_choice_prop(csym);
1087 * Set all non-assinged choice values to no
1089 expr_list_for_each_sym(prop->expr, e, sym) {
1090 if (!sym_has_value(sym))
1091 sym->def[S_DEF_USER].tri = no;
1093 csym->flags |= SYMBOL_DEF_USER;
1094 /* clear VALID to get value calculated */
1095 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1098 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1100 struct symbol *sym, *csym;
1101 int i, cnt, pby, pty, ptm; /* pby: probability of bool = y
1102 * pty: probability of tristate = y
1103 * ptm: probability of tristate = m
1106 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1107 * below, otherwise gcc whines about
1108 * -Wmaybe-uninitialized */
1109 if (mode == def_random) {
1111 char *env = getenv("KCONFIG_PROBABILITY");
1113 while( env && *env ) {
1115 int tmp = strtol( env, &endp, 10 );
1116 if( tmp >= 0 && tmp <= 100 ) {
1120 perror( "KCONFIG_PROBABILITY" );
1123 env = (*endp == ':') ? endp+1 : endp;
1130 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1133 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1136 pby = p[0]; pty = p[1]; ptm = p[2];
1140 if( pty+ptm > 100 ) {
1142 perror( "KCONFIG_PROBABILITY" );
1146 bool has_changed = false;
1148 for_all_symbols(i, sym) {
1149 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1151 switch (sym_get_type(sym)) {
1157 sym->def[S_DEF_USER].tri = yes;
1160 sym->def[S_DEF_USER].tri = mod;
1163 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1164 sym->def[S_DEF_USER].tri = yes;
1166 sym->def[S_DEF_USER].tri = no;
1169 sym->def[S_DEF_USER].tri = no;
1171 if (sym->type == S_TRISTATE) {
1173 sym->def[S_DEF_USER].tri = yes;
1174 else if (cnt < (pty+ptm))
1175 sym->def[S_DEF_USER].tri = mod;
1176 } else if (cnt < pby)
1177 sym->def[S_DEF_USER].tri = yes;
1182 if (!(sym_is_choice(sym) && mode == def_random))
1183 sym->flags |= SYMBOL_DEF_USER;
1191 sym_clear_all_valid();
1194 * We have different type of choice blocks.
1195 * If curr.tri equals to mod then we can select several
1196 * choice symbols in one block.
1197 * In this case we do nothing.
1198 * If curr.tri equals yes then only one symbol can be
1199 * selected in a choice block and we set it to yes,
1200 * and the rest to no.
1202 if (mode != def_random) {
1203 for_all_symbols(i, csym) {
1204 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1205 sym_is_choice_value(csym))
1206 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1210 for_all_symbols(i, csym) {
1211 if (sym_has_value(csym) || !sym_is_choice(csym))
1214 sym_calc_value(csym);
1215 if (mode == def_random)
1216 has_changed = randomize_choice_values(csym);
1218 set_all_choice_values(csym);