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, conf_unsaved;
33 const char conf_defname[] = "arch/$ARCH/defconfig";
35 static void conf_warning(const char *fmt, ...)
39 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
40 vfprintf(stderr, fmt, ap);
41 fprintf(stderr, "\n");
46 static void conf_default_message_callback(const char *fmt, va_list ap)
53 static void (*conf_message_callback) (const char *fmt, va_list ap) =
54 conf_default_message_callback;
55 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
57 conf_message_callback = fn;
60 static void conf_message(const char *fmt, ...)
65 if (conf_message_callback)
66 conf_message_callback(fmt, ap);
70 const char *conf_get_configname(void)
72 char *name = getenv("KCONFIG_CONFIG");
74 return name ? name : ".config";
77 const char *conf_get_autoconfig_name(void)
79 char *name = getenv("KCONFIG_AUTOCONFIG");
81 return name ? name : "include/config/auto.conf";
84 static char *conf_expand_value(const char *in)
88 static char res_value[SYMBOL_MAXLENGTH];
89 char *dst, name[SYMBOL_MAXLENGTH];
93 while ((src = strchr(in, '$'))) {
94 strncat(res_value, in, src - in);
97 while (isalnum(*src) || *src == '_')
100 sym = sym_lookup(name, 0);
102 strcat(res_value, sym_get_string_value(sym));
105 strcat(res_value, in);
110 char *conf_get_default_confname(void)
113 static char fullname[PATH_MAX+1];
116 name = conf_expand_value(conf_defname);
117 env = getenv(SRCTREE);
119 sprintf(fullname, "%s/%s", env, name);
120 if (!stat(fullname, &buf))
126 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
133 sym->def[def].tri = mod;
134 sym->flags |= def_flags;
140 sym->def[def].tri = yes;
141 sym->flags |= def_flags;
145 sym->def[def].tri = no;
146 sym->flags |= def_flags;
149 if (def != S_DEF_AUTO)
150 conf_warning("symbol value '%s' invalid for %s",
155 for (p2 = p; *p2 && !isspace(*p2); p2++)
157 sym->type = S_STRING;
164 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
169 memmove(p2, p2 + 1, strlen(p2));
172 if (def != S_DEF_AUTO)
173 conf_warning("invalid string found");
180 if (sym_string_valid(sym, p)) {
181 sym->def[def].val = strdup(p);
182 sym->flags |= def_flags;
184 if (def != S_DEF_AUTO)
185 conf_warning("symbol value '%s' invalid for %s",
196 #define LINE_GROWTH 16
197 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
200 size_t new_size = slen + 1;
202 new_size += LINE_GROWTH - 1;
204 nline = realloc(*lineptr, new_size);
212 (*lineptr)[slen] = c;
217 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
219 char *line = *lineptr;
223 int c = getc(stream);
227 if (add_byte(c, &line, slen, n) < 0)
232 if (add_byte('\0', &line, slen, n) < 0)
239 if (add_byte(c, &line, slen, n) < 0)
251 int conf_read_simple(const char *name, int def)
255 size_t line_asize = 0;
261 in = zconf_fopen(name);
263 struct property *prop;
265 name = conf_get_configname();
266 in = zconf_fopen(name);
269 sym_add_change_count(1);
270 if (!sym_defconfig_list)
273 for_all_defaults(sym_defconfig_list, prop) {
274 if (expr_calc_value(prop->visible.expr) == no ||
275 prop->expr->type != E_SYMBOL)
277 name = conf_expand_value(prop->expr->left.sym->name);
278 in = zconf_fopen(name);
280 conf_message(_("using defaults found in %s"),
290 conf_filename = name;
295 def_flags = SYMBOL_DEF << def;
296 for_all_symbols(i, sym) {
297 sym->flags |= SYMBOL_CHANGED;
298 sym->flags &= ~(def_flags|SYMBOL_VALID);
299 if (sym_is_choice(sym))
300 sym->flags |= def_flags;
305 if (sym->def[def].val)
306 free(sym->def[def].val);
309 sym->def[def].val = NULL;
310 sym->def[def].tri = no;
314 while (compat_getline(&line, &line_asize, in) != -1) {
317 if (line[0] == '#') {
318 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
320 p = strchr(line + 2 + strlen(CONFIG_), ' ');
324 if (strncmp(p, "is not set", 10))
326 if (def == S_DEF_USER) {
327 sym = sym_find(line + 2 + strlen(CONFIG_));
329 sym_add_change_count(1);
333 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
334 if (sym->type == S_UNKNOWN)
335 sym->type = S_BOOLEAN;
337 if (sym->flags & def_flags) {
338 conf_warning("override: reassigning to symbol %s", sym->name);
343 sym->def[def].tri = no;
344 sym->flags |= def_flags;
349 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
350 p = strchr(line + strlen(CONFIG_), '=');
354 p2 = strchr(p, '\n');
360 if (def == S_DEF_USER) {
361 sym = sym_find(line + strlen(CONFIG_));
363 sym_add_change_count(1);
367 sym = sym_lookup(line + strlen(CONFIG_), 0);
368 if (sym->type == S_UNKNOWN)
371 if (sym->flags & def_flags) {
372 conf_warning("override: reassigning to symbol %s", sym->name);
374 if (conf_set_sym_val(sym, def, def_flags, p))
377 if (line[0] != '\r' && line[0] != '\n')
378 conf_warning("unexpected data: %.*s",
379 (int)strcspn(line, "\r\n"), line);
384 if (sym && sym_is_choice_value(sym)) {
385 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
386 switch (sym->def[def].tri) {
390 if (cs->def[def].tri == yes) {
391 conf_warning("%s creates inconsistent choice state", sym->name);
392 cs->flags &= ~def_flags;
396 if (cs->def[def].tri != no)
397 conf_warning("override: %s changes choice state", sym->name);
398 cs->def[def].val = sym;
401 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
409 int conf_read(const char *name)
414 sym_set_change_count(0);
416 if (conf_read_simple(name, S_DEF_USER)) {
417 sym_calc_value(modules_sym);
421 sym_calc_value(modules_sym);
423 for_all_symbols(i, sym) {
425 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
427 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
428 /* check that calculated value agrees with saved value */
432 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
434 if (!sym_is_choice(sym))
438 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
442 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
443 /* no previous value and not saved */
446 /* maybe print value in verbose mode... */
449 for_all_symbols(i, sym) {
450 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
451 /* Reset values of generates values, so they'll appear
452 * as new, if they should become visible, but that
453 * doesn't quite work if the Kconfig and the saved
454 * configuration disagree.
456 if (sym->visible == no && !conf_unsaved)
457 sym->flags &= ~SYMBOL_DEF_USER;
462 /* Reset a string value if it's out of range */
463 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
465 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
474 sym_add_change_count(conf_warnings || conf_unsaved);
480 * Kconfig configuration printer
482 * This printer is used when generating the resulting configuration after
483 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
484 * passing a non-NULL argument to the printer.
488 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
495 bool skip_unset = (arg != NULL);
498 fprintf(fp, "# %s%s is not set\n",
507 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
511 kconfig_print_comment(FILE *fp, const char *value, void *arg)
513 const char *p = value;
517 l = strcspn(p, "\n");
521 xfwrite(p, l, 1, fp);
530 static struct conf_printer kconfig_printer_cb =
532 .print_symbol = kconfig_print_symbol,
533 .print_comment = kconfig_print_comment,
539 * This printer is used when generating the `include/generated/autoconf.h' file.
542 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
548 const char *suffix = "";
557 fprintf(fp, "#define %s%s%s 1\n",
558 CONFIG_, sym->name, suffix);
563 const char *prefix = "";
565 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
567 fprintf(fp, "#define %s%s %s%s\n",
568 CONFIG_, sym->name, prefix, value);
573 fprintf(fp, "#define %s%s %s\n",
574 CONFIG_, sym->name, value);
583 header_print_comment(FILE *fp, const char *value, void *arg)
585 const char *p = value;
590 l = strcspn(p, "\n");
594 xfwrite(p, l, 1, fp);
601 fprintf(fp, " */\n");
604 static struct conf_printer header_printer_cb =
606 .print_symbol = header_print_symbol,
607 .print_comment = header_print_comment,
613 * This printer is used when generating the `include/config/tristate.conf' file.
616 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
619 if (sym->type == S_TRISTATE && *value != 'n')
620 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
623 static struct conf_printer tristate_printer_cb =
625 .print_symbol = tristate_print_symbol,
626 .print_comment = kconfig_print_comment,
629 static void conf_write_symbol(FILE *fp, struct symbol *sym,
630 struct conf_printer *printer, void *printer_arg)
639 str = sym_get_string_value(sym);
640 str = sym_escape_string_value(str);
641 printer->print_symbol(fp, sym, str, printer_arg);
645 str = sym_get_string_value(sym);
646 printer->print_symbol(fp, sym, str, printer_arg);
651 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
655 snprintf(buf, sizeof(buf),
657 "Automatically generated file; DO NOT EDIT.\n"
659 rootmenu.prompt->text);
661 printer->print_comment(fp, buf, printer_arg);
665 * Write out a minimal config.
666 * All values that has default values are skipped as this is redundant.
668 int conf_write_defconfig(const char *filename)
674 out = fopen(filename, "w");
678 sym_clear_all_valid();
680 /* Traverse all menus to find all relevant symbols */
681 menu = rootmenu.list;
687 if (!menu_is_visible(menu))
689 } else if (!sym_is_choice(sym)) {
691 if (!(sym->flags & SYMBOL_WRITE))
693 sym->flags &= ~SYMBOL_WRITE;
694 /* If we cannot change the symbol - skip */
695 if (!sym_is_changable(sym))
697 /* If symbol equals to default value - skip */
698 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
702 * If symbol is a choice value and equals to the
703 * default for a choice - skip.
704 * But only if value is bool and equal to "y" and
705 * choice is not "optional".
706 * (If choice is "optional" then all values can be "n")
708 if (sym_is_choice_value(sym)) {
712 cs = prop_get_symbol(sym_get_choice_prop(sym));
713 ds = sym_choice_default(cs);
714 if (!sym_is_optional(cs) && sym == ds) {
715 if ((sym->type == S_BOOLEAN) &&
716 sym_get_tristate_value(sym) == yes)
720 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
723 if (menu->list != NULL) {
726 else if (menu->next != NULL) {
729 while ((menu = menu->parent)) {
730 if (menu->next != NULL) {
741 int conf_write(const char *name)
746 const char *basename;
748 char dirname[PATH_MAX+1], tmpname[PATH_MAX+22], newname[PATH_MAX+8];
752 if (name && name[0]) {
756 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
757 strcpy(dirname, name);
758 strcat(dirname, "/");
759 basename = conf_get_configname();
760 } else if ((slash = strrchr(name, '/'))) {
761 int size = slash - name + 1;
762 memcpy(dirname, name, size);
765 basename = slash + 1;
767 basename = conf_get_configname();
771 basename = conf_get_configname();
773 sprintf(newname, "%s%s", dirname, basename);
774 env = getenv("KCONFIG_OVERWRITECONFIG");
776 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
777 out = fopen(tmpname, "w");
780 out = fopen(newname, "w");
785 conf_write_heading(out, &kconfig_printer_cb, NULL);
787 if (!conf_get_changed())
788 sym_clear_all_valid();
790 menu = rootmenu.list;
794 if (!menu_is_visible(menu))
796 str = menu_get_prompt(menu);
801 } else if (!(sym->flags & SYMBOL_CHOICE)) {
803 if (!(sym->flags & SYMBOL_WRITE))
805 sym->flags &= ~SYMBOL_WRITE;
807 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
817 else while ((menu = menu->parent)) {
827 strcat(dirname, basename);
828 strcat(dirname, ".old");
829 rename(newname, dirname);
830 if (rename(tmpname, newname))
834 conf_message(_("configuration written to %s"), newname);
836 sym_set_change_count(0);
841 static int conf_split_config(void)
844 char path[PATH_MAX+1];
850 name = conf_get_autoconfig_name();
851 conf_read_simple(name, S_DEF_AUTO);
852 sym_calc_value(modules_sym);
854 if (chdir("include/config"))
858 for_all_symbols(i, sym) {
860 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
862 if (sym->flags & SYMBOL_WRITE) {
863 if (sym->flags & SYMBOL_DEF_AUTO) {
865 * symbol has old and new value,
871 if (sym_get_tristate_value(sym) ==
872 sym->def[S_DEF_AUTO].tri)
878 if (!strcmp(sym_get_string_value(sym),
879 sym->def[S_DEF_AUTO].val))
887 * If there is no old value, only 'no' (unset)
888 * is allowed as new value.
893 if (sym_get_tristate_value(sym) == no)
900 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
901 /* There is neither an old nor a new value. */
904 * There is an old value, but no new value ('no' (unset)
905 * isn't saved in auto.conf, so the old value is always
906 * different from 'no').
909 /* Replace all '_' and append ".h" */
914 *d++ = (c == '_') ? '/' : c;
918 /* Assume directory path already exists. */
919 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
921 if (errno != ENOENT) {
926 * Create directory components,
927 * unless they exist already.
930 while ((d = strchr(d, '/'))) {
932 if (stat(path, &sb) && mkdir(path, 0755)) {
939 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
954 int conf_write_autoconf(void)
958 FILE *out, *tristate, *out_h;
961 sym_clear_all_valid();
963 file_write_dep("include/config/auto.conf.cmd");
965 if (conf_split_config())
968 out = fopen(".tmpconfig", "w");
972 tristate = fopen(".tmpconfig_tristate", "w");
978 out_h = fopen(".tmpconfig.h", "w");
985 conf_write_heading(out, &kconfig_printer_cb, NULL);
987 conf_write_heading(tristate, &tristate_printer_cb, NULL);
989 conf_write_heading(out_h, &header_printer_cb, NULL);
991 for_all_symbols(i, sym) {
993 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
996 /* write symbol to auto.conf, tristate and header files */
997 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
999 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1001 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1007 name = getenv("KCONFIG_AUTOHEADER");
1009 name = "include/generated/autoconf.h";
1010 if (rename(".tmpconfig.h", name))
1012 name = getenv("KCONFIG_TRISTATE");
1014 name = "include/config/tristate.conf";
1015 if (rename(".tmpconfig_tristate", name))
1017 name = conf_get_autoconfig_name();
1019 * This must be the last step, kbuild has a dependency on auto.conf
1020 * and this marks the successful completion of the previous steps.
1022 if (rename(".tmpconfig", name))
1028 static int sym_change_count;
1029 static void (*conf_changed_callback)(void);
1031 void sym_set_change_count(int count)
1033 int _sym_change_count = sym_change_count;
1034 sym_change_count = count;
1035 if (conf_changed_callback &&
1036 (bool)_sym_change_count != (bool)count)
1037 conf_changed_callback();
1040 void sym_add_change_count(int count)
1042 sym_set_change_count(count + sym_change_count);
1045 bool conf_get_changed(void)
1047 return sym_change_count;
1050 void conf_set_changed_callback(void (*fn)(void))
1052 conf_changed_callback = fn;
1055 static bool randomize_choice_values(struct symbol *csym)
1057 struct property *prop;
1063 * If choice is mod then we may have more items selected
1064 * and if no then no-one.
1065 * In both cases stop.
1067 if (csym->curr.tri != yes)
1070 prop = sym_get_choice_prop(csym);
1072 /* count entries in choice block */
1074 expr_list_for_each_sym(prop->expr, e, sym)
1078 * find a random value and set it to yes,
1079 * set the rest to no so we have only one set
1081 def = (rand() % cnt);
1084 expr_list_for_each_sym(prop->expr, e, sym) {
1086 sym->def[S_DEF_USER].tri = yes;
1087 csym->def[S_DEF_USER].val = sym;
1090 sym->def[S_DEF_USER].tri = no;
1092 sym->flags |= SYMBOL_DEF_USER;
1093 /* clear VALID to get value calculated */
1094 sym->flags &= ~SYMBOL_VALID;
1096 csym->flags |= SYMBOL_DEF_USER;
1097 /* clear VALID to get value calculated */
1098 csym->flags &= ~(SYMBOL_VALID);
1103 void set_all_choice_values(struct symbol *csym)
1105 struct property *prop;
1109 prop = sym_get_choice_prop(csym);
1112 * Set all non-assinged choice values to no
1114 expr_list_for_each_sym(prop->expr, e, sym) {
1115 if (!sym_has_value(sym))
1116 sym->def[S_DEF_USER].tri = no;
1118 csym->flags |= SYMBOL_DEF_USER;
1119 /* clear VALID to get value calculated */
1120 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1123 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1125 struct symbol *sym, *csym;
1126 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y
1127 * pty: probability of tristate = y
1128 * ptm: probability of tristate = m
1131 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1132 * below, otherwise gcc whines about
1133 * -Wmaybe-uninitialized */
1134 if (mode == def_random) {
1136 char *env = getenv("KCONFIG_PROBABILITY");
1138 while( env && *env ) {
1140 int tmp = strtol( env, &endp, 10 );
1141 if( tmp >= 0 && tmp <= 100 ) {
1145 perror( "KCONFIG_PROBABILITY" );
1148 env = (*endp == ':') ? endp+1 : endp;
1155 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1158 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1161 pby = p[0]; pty = p[1]; ptm = p[2];
1165 if( pty+ptm > 100 ) {
1167 perror( "KCONFIG_PROBABILITY" );
1171 bool has_changed = false;
1173 for_all_symbols(i, sym) {
1174 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1176 switch (sym_get_type(sym)) {
1182 sym->def[S_DEF_USER].tri = yes;
1185 sym->def[S_DEF_USER].tri = mod;
1188 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1189 sym->def[S_DEF_USER].tri = yes;
1191 sym->def[S_DEF_USER].tri = no;
1194 sym->def[S_DEF_USER].tri = no;
1196 if (sym->type == S_TRISTATE) {
1198 sym->def[S_DEF_USER].tri = yes;
1199 else if (cnt < (pty+ptm))
1200 sym->def[S_DEF_USER].tri = mod;
1201 } else if (cnt < pby)
1202 sym->def[S_DEF_USER].tri = yes;
1207 if (!(sym_is_choice(sym) && mode == def_random))
1208 sym->flags |= SYMBOL_DEF_USER;
1216 sym_clear_all_valid();
1219 * We have different type of choice blocks.
1220 * If curr.tri equals to mod then we can select several
1221 * choice symbols in one block.
1222 * In this case we do nothing.
1223 * If curr.tri equals yes then only one symbol can be
1224 * selected in a choice block and we set it to yes,
1225 * and the rest to no.
1227 if (mode != def_random) {
1228 for_all_symbols(i, csym) {
1229 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1230 sym_is_choice_value(csym))
1231 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1235 for_all_symbols(i, csym) {
1236 if (sym_has_value(csym) || !sym_is_choice(csym))
1239 sym_calc_value(csym);
1240 if (mode == def_random)
1241 has_changed |= randomize_choice_values(csym);
1243 set_all_choice_values(csym);