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[] = "include/generated/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/generated/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_cmake_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
493 bool skip_unset = (arg != NULL);
496 fprintf(fp, "set(%s%s false)\n",
497 CONFIG_, sym->name, value);
499 } else if (*value == 'm') {
502 fprintf(fp, "set(%s%s true)\n", CONFIG_, sym->name, value);
506 const char *prefix = "";
508 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
510 fprintf(fp, "set(%s%s %s%s)\n",
511 CONFIG_, sym->name, prefix, value);
516 fprintf(fp, "set(%s%s %s)\n",
517 CONFIG_, sym->name, value);
526 kconfig_print_comment(FILE *fp, const char *value, void *arg)
528 const char *p = value;
532 l = strcspn(p, "\n");
536 xfwrite(p, l, 1, fp);
545 static struct conf_printer kconfig_printer_cb =
547 .print_symbol = kconfig_print_symbol,
548 .print_comment = kconfig_print_comment,
551 static struct conf_printer kconfig_printer_cmake_cb =
553 .print_symbol = kconfig_print_cmake_symbol,
554 .print_comment = kconfig_print_comment,
560 * This printer is used when generating the `include/generated/autoconf.h' file.
563 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
569 const char *suffix = "";
578 fprintf(fp, "#define %s%s%s 1\n",
579 CONFIG_, sym->name, suffix);
584 const char *prefix = "";
586 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
588 fprintf(fp, "#define %s%s %s%s\n",
589 CONFIG_, sym->name, prefix, value);
594 fprintf(fp, "#define %s%s %s\n",
595 CONFIG_, sym->name, value);
604 header_print_comment(FILE *fp, const char *value, void *arg)
606 const char *p = value;
611 l = strcspn(p, "\n");
615 xfwrite(p, l, 1, fp);
622 fprintf(fp, " */\n");
625 static struct conf_printer header_printer_cb =
627 .print_symbol = header_print_symbol,
628 .print_comment = header_print_comment,
634 * This printer is used when generating the `include/generated/tristate.conf' file.
637 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
640 if (sym->type == S_TRISTATE && *value != 'n')
641 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
644 static struct conf_printer tristate_printer_cb =
646 .print_symbol = tristate_print_symbol,
647 .print_comment = kconfig_print_comment,
650 static void conf_write_symbol(FILE *fp, struct symbol *sym,
651 struct conf_printer *printer, void *printer_arg)
660 str = sym_get_string_value(sym);
661 str = sym_escape_string_value(str);
662 printer->print_symbol(fp, sym, str, printer_arg);
666 str = sym_get_string_value(sym);
667 printer->print_symbol(fp, sym, str, printer_arg);
672 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
676 snprintf(buf, sizeof(buf),
678 "Automatically generated file; DO NOT EDIT.\n"
680 rootmenu.prompt->text);
682 printer->print_comment(fp, buf, printer_arg);
686 * Write out a minimal config.
687 * All values that has default values are skipped as this is redundant.
689 int conf_write_defconfig(const char *filename)
695 out = fopen(filename, "w");
699 sym_clear_all_valid();
701 /* Traverse all menus to find all relevant symbols */
702 menu = rootmenu.list;
708 if (!menu_is_visible(menu))
710 } else if (!sym_is_choice(sym)) {
712 if (!(sym->flags & SYMBOL_WRITE))
714 sym->flags &= ~SYMBOL_WRITE;
715 /* If we cannot change the symbol - skip */
716 if (!sym_is_changable(sym))
718 /* If symbol equals to default value - skip */
719 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
723 * If symbol is a choice value and equals to the
724 * default for a choice - skip.
725 * But only if value is bool and equal to "y" and
726 * choice is not "optional".
727 * (If choice is "optional" then all values can be "n")
729 if (sym_is_choice_value(sym)) {
733 cs = prop_get_symbol(sym_get_choice_prop(sym));
734 ds = sym_choice_default(cs);
735 if (!sym_is_optional(cs) && sym == ds) {
736 if ((sym->type == S_BOOLEAN) &&
737 sym_get_tristate_value(sym) == yes)
741 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
744 if (menu->list != NULL) {
747 else if (menu->next != NULL) {
750 while ((menu = menu->parent)) {
751 if (menu->next != NULL) {
762 int conf_write(const char *name)
767 const char *basename;
769 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
773 if (name && name[0]) {
777 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
778 strcpy(dirname, name);
779 strcat(dirname, "/");
780 basename = conf_get_configname();
781 } else if ((slash = strrchr(name, '/'))) {
782 int size = slash - name + 1;
783 memcpy(dirname, name, size);
786 basename = slash + 1;
788 basename = conf_get_configname();
792 basename = conf_get_configname();
794 sprintf(newname, "%s%s", dirname, basename);
795 env = getenv("KCONFIG_OVERWRITECONFIG");
797 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
798 out = fopen(tmpname, "w");
801 out = fopen(newname, "w");
806 conf_write_heading(out, &kconfig_printer_cb, NULL);
808 if (!conf_get_changed())
809 sym_clear_all_valid();
811 menu = rootmenu.list;
815 if (!menu_is_visible(menu))
817 str = menu_get_prompt(menu);
822 } else if (!(sym->flags & SYMBOL_CHOICE)) {
824 if (!(sym->flags & SYMBOL_WRITE))
826 sym->flags &= ~SYMBOL_WRITE;
828 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
838 else while ((menu = menu->parent)) {
848 strcat(dirname, basename);
849 strcat(dirname, ".old");
850 rename(newname, dirname);
851 if (rename(tmpname, newname))
855 conf_message("configuration written to %s", newname);
857 sym_set_change_count(0);
862 static int conf_split_config(void)
865 char path[PATH_MAX+1];
871 name = conf_get_autoconfig_name();
872 conf_read_simple(name, S_DEF_AUTO);
873 sym_calc_value(modules_sym);
875 if (chdir("include/generated"))
879 for_all_symbols(i, sym) {
881 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
883 if (sym->flags & SYMBOL_WRITE) {
884 if (sym->flags & SYMBOL_DEF_AUTO) {
886 * symbol has old and new value,
892 if (sym_get_tristate_value(sym) ==
893 sym->def[S_DEF_AUTO].tri)
899 if (!strcmp(sym_get_string_value(sym),
900 sym->def[S_DEF_AUTO].val))
908 * If there is no old value, only 'no' (unset)
909 * is allowed as new value.
914 if (sym_get_tristate_value(sym) == no)
921 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
922 /* There is neither an old nor a new value. */
925 * There is an old value, but no new value ('no' (unset)
926 * isn't saved in auto.conf, so the old value is always
927 * different from 'no').
930 /* Replace all '_' and append ".h" */
935 *d++ = (c == '_') ? '/' : c;
939 /* Assume directory path already exists. */
940 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
942 if (errno != ENOENT) {
947 * Create directory components,
948 * unless they exist already.
951 while ((d = strchr(d, '/'))) {
953 if (stat(path, &sb) && mkdir(path, 0755)) {
960 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
975 int conf_write_autoconf(void)
979 FILE *out, *tristate, *out_h, *out_c;
982 sym_clear_all_valid();
984 file_write_dep("include/generated/auto.conf.cmd");
986 if (conf_split_config())
989 out = fopen(".tmpconfig", "w");
993 tristate = fopen(".tmpconfig_tristate", "w");
999 out_h = fopen(".tmpconfig.h", "w");
1006 out_c = fopen(".tmpconfig.cmake", "w");
1013 conf_write_heading(out, &kconfig_printer_cb, NULL);
1015 conf_write_heading(tristate, &tristate_printer_cb, NULL);
1017 conf_write_heading(out_h, &header_printer_cb, NULL);
1019 conf_write_heading(out_c, &kconfig_printer_cmake_cb, NULL);
1021 for_all_symbols(i, sym) {
1022 sym_calc_value(sym);
1023 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1026 /* write symbol to auto.conf, tristate and header files */
1027 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1029 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1031 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1033 conf_write_symbol(out_c, sym, &kconfig_printer_cmake_cb, NULL);
1040 name = getenv("KCONFIG_AUTOHEADER");
1042 name = "include/generated/autoconf.h";
1043 if (rename(".tmpconfig.h", name))
1045 name = getenv("KCONFIG_TRISTATE");
1047 name = "include/generated/tristate.conf";
1048 if (rename(".tmpconfig_tristate", name))
1050 name = getenv("KCONFIG_CMAKE");
1052 name = "config.cmake";
1053 if (rename(".tmpconfig.cmake", name))
1055 name = conf_get_autoconfig_name();
1057 * This must be the last step, kbuild has a dependency on auto.conf
1058 * and this marks the successful completion of the previous steps.
1060 if (rename(".tmpconfig", name))
1066 static int sym_change_count;
1067 static void (*conf_changed_callback)(void);
1069 void sym_set_change_count(int count)
1071 int _sym_change_count = sym_change_count;
1072 sym_change_count = count;
1073 if (conf_changed_callback &&
1074 (bool)_sym_change_count != (bool)count)
1075 conf_changed_callback();
1078 void sym_add_change_count(int count)
1080 sym_set_change_count(count + sym_change_count);
1083 bool conf_get_changed(void)
1085 return sym_change_count;
1088 void conf_set_changed_callback(void (*fn)(void))
1090 conf_changed_callback = fn;
1093 static bool randomize_choice_values(struct symbol *csym)
1095 struct property *prop;
1101 * If choice is mod then we may have more items selected
1102 * and if no then no-one.
1103 * In both cases stop.
1105 if (csym->curr.tri != yes)
1108 prop = sym_get_choice_prop(csym);
1110 /* count entries in choice block */
1112 expr_list_for_each_sym(prop->expr, e, sym)
1116 * find a random value and set it to yes,
1117 * set the rest to no so we have only one set
1119 def = (rand() % cnt);
1122 expr_list_for_each_sym(prop->expr, e, sym) {
1124 sym->def[S_DEF_USER].tri = yes;
1125 csym->def[S_DEF_USER].val = sym;
1128 sym->def[S_DEF_USER].tri = no;
1130 sym->flags |= SYMBOL_DEF_USER;
1131 /* clear VALID to get value calculated */
1132 sym->flags &= ~SYMBOL_VALID;
1134 csym->flags |= SYMBOL_DEF_USER;
1135 /* clear VALID to get value calculated */
1136 csym->flags &= ~(SYMBOL_VALID);
1141 void set_all_choice_values(struct symbol *csym)
1143 struct property *prop;
1147 prop = sym_get_choice_prop(csym);
1150 * Set all non-assinged choice values to no
1152 expr_list_for_each_sym(prop->expr, e, sym) {
1153 if (!sym_has_value(sym))
1154 sym->def[S_DEF_USER].tri = no;
1156 csym->flags |= SYMBOL_DEF_USER;
1157 /* clear VALID to get value calculated */
1158 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1161 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1163 struct symbol *sym, *csym;
1164 int i, cnt, pby, pty, ptm; /* pby: probability of bool = y
1165 * pty: probability of tristate = y
1166 * ptm: probability of tristate = m
1169 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1170 * below, otherwise gcc whines about
1171 * -Wmaybe-uninitialized */
1172 if (mode == def_random) {
1174 char *env = getenv("KCONFIG_PROBABILITY");
1176 while( env && *env ) {
1178 int tmp = strtol( env, &endp, 10 );
1179 if( tmp >= 0 && tmp <= 100 ) {
1183 perror( "KCONFIG_PROBABILITY" );
1186 env = (*endp == ':') ? endp+1 : endp;
1193 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1196 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1199 pby = p[0]; pty = p[1]; ptm = p[2];
1203 if( pty+ptm > 100 ) {
1205 perror( "KCONFIG_PROBABILITY" );
1209 bool has_changed = false;
1211 for_all_symbols(i, sym) {
1212 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1214 switch (sym_get_type(sym)) {
1220 sym->def[S_DEF_USER].tri = yes;
1223 sym->def[S_DEF_USER].tri = mod;
1226 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1227 sym->def[S_DEF_USER].tri = yes;
1229 sym->def[S_DEF_USER].tri = no;
1232 sym->def[S_DEF_USER].tri = no;
1234 if (sym->type == S_TRISTATE) {
1236 sym->def[S_DEF_USER].tri = yes;
1237 else if (cnt < (pty+ptm))
1238 sym->def[S_DEF_USER].tri = mod;
1239 } else if (cnt < pby)
1240 sym->def[S_DEF_USER].tri = yes;
1245 if (!(sym_is_choice(sym) && mode == def_random))
1246 sym->flags |= SYMBOL_DEF_USER;
1254 sym_clear_all_valid();
1257 * We have different type of choice blocks.
1258 * If curr.tri equals to mod then we can select several
1259 * choice symbols in one block.
1260 * In this case we do nothing.
1261 * If curr.tri equals yes then only one symbol can be
1262 * selected in a choice block and we set it to yes,
1263 * and the rest to no.
1265 if (mode != def_random) {
1266 for_all_symbols(i, csym) {
1267 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1268 sym_is_choice_value(csym))
1269 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1273 for_all_symbols(i, csym) {
1274 if (sym_has_value(csym) || !sym_is_choice(csym))
1277 sym_calc_value(csym);
1278 if (mode == def_random)
1279 has_changed = randomize_choice_values(csym);
1281 set_all_choice_values(csym);