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 void conf_reset(int def)
256 def_flags = SYMBOL_DEF << def;
257 for_all_symbols(i, sym) {
258 sym->flags |= SYMBOL_CHANGED;
259 sym->flags &= ~(def_flags|SYMBOL_VALID);
260 if (sym_is_choice(sym))
261 sym->flags |= def_flags;
266 if (sym->def[def].val)
267 free(sym->def[def].val);
270 sym->def[def].val = NULL;
271 sym->def[def].tri = no;
276 int conf_read_simple(const char *name, int def)
280 size_t line_asize = 0;
286 in = zconf_fopen(name);
288 struct property *prop;
290 name = conf_get_configname();
291 in = zconf_fopen(name);
294 sym_add_change_count(1);
295 if (!sym_defconfig_list)
298 for_all_defaults(sym_defconfig_list, prop) {
299 if (expr_calc_value(prop->visible.expr) == no ||
300 prop->expr->type != E_SYMBOL)
302 name = conf_expand_value(prop->expr->left.sym->name);
303 in = zconf_fopen(name);
305 conf_message(_("using defaults found in %s"),
315 conf_filename = name;
320 def_flags = SYMBOL_DEF << def;
323 while (compat_getline(&line, &line_asize, in) != -1) {
326 if (line[0] == '#') {
327 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
329 p = strchr(line + 2 + strlen(CONFIG_), ' ');
333 if (strncmp(p, "is not set", 10))
335 if (def == S_DEF_USER) {
336 sym = sym_find(line + 2 + strlen(CONFIG_));
338 sym_add_change_count(1);
342 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
343 if (sym->type == S_UNKNOWN)
344 sym->type = S_BOOLEAN;
349 sym->def[def].tri = no;
350 sym->flags |= def_flags;
355 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
356 p = strchr(line + strlen(CONFIG_), '=');
360 p2 = strchr(p, '\n');
366 if (def == S_DEF_USER) {
367 sym = sym_find(line + strlen(CONFIG_));
369 sym_add_change_count(1);
373 sym = sym_lookup(line + strlen(CONFIG_), 0);
374 if (sym->type == S_UNKNOWN)
377 if (conf_set_sym_val(sym, def, def_flags, p))
380 if (line[0] != '\r' && line[0] != '\n')
381 conf_warning("unexpected data: %.*s",
382 (int)strcspn(line, "\r\n"), line);
387 if (sym && sym_is_choice_value(sym)) {
388 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
389 switch (sym->def[def].tri) {
393 if (cs->def[def].tri == yes) {
394 conf_warning("%s creates inconsistent choice state", sym->name);
395 cs->flags &= ~def_flags;
399 if (cs->def[def].tri != no)
400 conf_warning("override: %s changes choice state", sym->name);
401 cs->def[def].val = sym;
404 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
412 int conf_read(const char *name)
417 sym_set_change_count(0);
419 if (conf_read_simple(name, S_DEF_USER)) {
420 sym_calc_value(modules_sym);
424 sym_calc_value(modules_sym);
426 for_all_symbols(i, sym) {
428 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
430 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
431 /* check that calculated value agrees with saved value */
435 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
437 if (!sym_is_choice(sym))
441 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
445 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
446 /* no previous value and not saved */
449 /* maybe print value in verbose mode... */
452 for_all_symbols(i, sym) {
453 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
454 /* Reset values of generates values, so they'll appear
455 * as new, if they should become visible, but that
456 * doesn't quite work if the Kconfig and the saved
457 * configuration disagree.
459 if (sym->visible == no && !conf_unsaved)
460 sym->flags &= ~SYMBOL_DEF_USER;
465 /* Reset a string value if it's out of range */
466 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
468 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
477 sym_add_change_count(conf_warnings || conf_unsaved);
483 * Kconfig configuration printer
485 * This printer is used when generating the resulting configuration after
486 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
487 * passing a non-NULL argument to the printer.
491 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
498 bool skip_unset = (arg != NULL);
501 fprintf(fp, "# %s%s is not set\n",
510 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
514 kconfig_print_comment(FILE *fp, const char *value, void *arg)
516 const char *p = value;
520 l = strcspn(p, "\n");
524 xfwrite(p, l, 1, fp);
533 static struct conf_printer kconfig_printer_cb =
535 .print_symbol = kconfig_print_symbol,
536 .print_comment = kconfig_print_comment,
542 * This printer is used when generating the `include/generated/autoconf.h' file.
545 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
551 const char *suffix = "";
560 fprintf(fp, "#define %s%s%s 1\n",
561 CONFIG_, sym->name, suffix);
566 const char *prefix = "";
568 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
570 fprintf(fp, "#define %s%s %s%s\n",
571 CONFIG_, sym->name, prefix, value);
576 fprintf(fp, "#define %s%s %s\n",
577 CONFIG_, sym->name, value);
586 header_print_comment(FILE *fp, const char *value, void *arg)
588 const char *p = value;
593 l = strcspn(p, "\n");
597 xfwrite(p, l, 1, fp);
604 fprintf(fp, " */\n");
607 static struct conf_printer header_printer_cb =
609 .print_symbol = header_print_symbol,
610 .print_comment = header_print_comment,
616 * This printer is used when generating the `include/config/tristate.conf' file.
619 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
622 if (sym->type == S_TRISTATE && *value != 'n')
623 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
626 static struct conf_printer tristate_printer_cb =
628 .print_symbol = tristate_print_symbol,
629 .print_comment = kconfig_print_comment,
632 static void conf_write_symbol(FILE *fp, struct symbol *sym,
633 struct conf_printer *printer, void *printer_arg)
642 str = sym_get_string_value(sym);
643 str = sym_escape_string_value(str);
644 printer->print_symbol(fp, sym, str, printer_arg);
648 str = sym_get_string_value(sym);
649 printer->print_symbol(fp, sym, str, printer_arg);
654 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
658 snprintf(buf, sizeof(buf),
660 "Automatically generated file; DO NOT EDIT.\n"
662 rootmenu.prompt->text);
664 printer->print_comment(fp, buf, printer_arg);
668 * Write out a minimal config.
669 * All values that has default values are skipped as this is redundant.
671 int conf_write_defconfig(const char *filename)
677 out = fopen(filename, "w");
681 sym_clear_all_valid();
683 /* Traverse all menus to find all relevant symbols */
684 menu = rootmenu.list;
690 if (!menu_is_visible(menu))
692 } else if (!sym_is_choice(sym)) {
694 if (!(sym->flags & SYMBOL_WRITE))
696 sym->flags &= ~SYMBOL_WRITE;
697 /* If we cannot change the symbol - skip */
698 if (!sym_is_changable(sym))
700 /* If symbol equals to default value - skip */
701 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
705 * If symbol is a choice value and equals to the
706 * default for a choice - skip.
707 * But only if value is bool and equal to "y" and
708 * choice is not "optional".
709 * (If choice is "optional" then all values can be "n")
711 if (sym_is_choice_value(sym)) {
715 cs = prop_get_symbol(sym_get_choice_prop(sym));
716 ds = sym_choice_default(cs);
717 if (!sym_is_optional(cs) && sym == ds) {
718 if ((sym->type == S_BOOLEAN) &&
719 sym_get_tristate_value(sym) == yes)
723 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
726 if (menu->list != NULL) {
729 else if (menu->next != NULL) {
732 while ((menu = menu->parent)) {
733 if (menu->next != NULL) {
744 int conf_write(const char *name)
749 const char *basename;
751 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
755 if (name && name[0]) {
759 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
760 strcpy(dirname, name);
761 strcat(dirname, "/");
762 basename = conf_get_configname();
763 } else if ((slash = strrchr(name, '/'))) {
764 int size = slash - name + 1;
765 memcpy(dirname, name, size);
768 basename = slash + 1;
770 basename = conf_get_configname();
774 basename = conf_get_configname();
776 sprintf(newname, "%s%s", dirname, basename);
777 env = getenv("KCONFIG_OVERWRITECONFIG");
779 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
780 out = fopen(tmpname, "w");
783 out = fopen(newname, "w");
788 conf_write_heading(out, &kconfig_printer_cb, NULL);
790 if (!conf_get_changed())
791 sym_clear_all_valid();
793 menu = rootmenu.list;
797 if (!menu_is_visible(menu))
799 str = menu_get_prompt(menu);
804 } else if (!(sym->flags & SYMBOL_CHOICE)) {
806 if (!(sym->flags & SYMBOL_WRITE))
808 sym->flags &= ~SYMBOL_WRITE;
810 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
820 else while ((menu = menu->parent)) {
830 strcat(dirname, basename);
831 strcat(dirname, ".old");
832 rename(newname, dirname);
833 if (rename(tmpname, newname))
837 conf_message(_("configuration written to %s"), newname);
839 sym_set_change_count(0);
844 static int conf_split_config(void)
847 char path[PATH_MAX+1];
853 name = conf_get_autoconfig_name();
854 conf_read_simple(name, S_DEF_AUTO);
855 sym_calc_value(modules_sym);
857 if (chdir("include/config"))
861 for_all_symbols(i, sym) {
863 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
865 if (sym->flags & SYMBOL_WRITE) {
866 if (sym->flags & SYMBOL_DEF_AUTO) {
868 * symbol has old and new value,
874 if (sym_get_tristate_value(sym) ==
875 sym->def[S_DEF_AUTO].tri)
881 if (!strcmp(sym_get_string_value(sym),
882 sym->def[S_DEF_AUTO].val))
890 * If there is no old value, only 'no' (unset)
891 * is allowed as new value.
896 if (sym_get_tristate_value(sym) == no)
903 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
904 /* There is neither an old nor a new value. */
907 * There is an old value, but no new value ('no' (unset)
908 * isn't saved in auto.conf, so the old value is always
909 * different from 'no').
912 /* Replace all '_' and append ".h" */
917 *d++ = (c == '_') ? '/' : c;
921 /* Assume directory path already exists. */
922 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
924 if (errno != ENOENT) {
929 * Create directory components,
930 * unless they exist already.
933 while ((d = strchr(d, '/'))) {
935 if (stat(path, &sb) && mkdir(path, 0755)) {
942 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
957 int conf_write_autoconf(void)
961 FILE *out, *tristate, *out_h;
964 sym_clear_all_valid();
966 file_write_dep("include/config/auto.conf.cmd");
968 if (conf_split_config())
971 out = fopen(".tmpconfig", "w");
975 tristate = fopen(".tmpconfig_tristate", "w");
981 out_h = fopen(".tmpconfig.h", "w");
988 conf_write_heading(out, &kconfig_printer_cb, NULL);
990 conf_write_heading(tristate, &tristate_printer_cb, NULL);
992 conf_write_heading(out_h, &header_printer_cb, NULL);
994 for_all_symbols(i, sym) {
996 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
999 /* write symbol to auto.conf, tristate and header files */
1000 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1002 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1004 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1010 name = getenv("KCONFIG_AUTOHEADER");
1012 name = "include/generated/autoconf.h";
1013 if (rename(".tmpconfig.h", name))
1015 name = getenv("KCONFIG_TRISTATE");
1017 name = "include/config/tristate.conf";
1018 if (rename(".tmpconfig_tristate", name))
1020 name = conf_get_autoconfig_name();
1022 * This must be the last step, kbuild has a dependency on auto.conf
1023 * and this marks the successful completion of the previous steps.
1025 if (rename(".tmpconfig", name))
1031 static int sym_change_count;
1032 static void (*conf_changed_callback)(void);
1034 void sym_set_change_count(int count)
1036 int _sym_change_count = sym_change_count;
1037 sym_change_count = count;
1038 if (conf_changed_callback &&
1039 (bool)_sym_change_count != (bool)count)
1040 conf_changed_callback();
1043 void sym_add_change_count(int count)
1045 sym_set_change_count(count + sym_change_count);
1048 bool conf_get_changed(void)
1050 return sym_change_count;
1053 void conf_set_changed_callback(void (*fn)(void))
1055 conf_changed_callback = fn;
1058 static bool randomize_choice_values(struct symbol *csym)
1060 struct property *prop;
1066 * If choice is mod then we may have more items selected
1067 * and if no then no-one.
1068 * In both cases stop.
1070 if (csym->curr.tri != yes)
1073 prop = sym_get_choice_prop(csym);
1075 /* count entries in choice block */
1077 expr_list_for_each_sym(prop->expr, e, sym)
1081 * find a random value and set it to yes,
1082 * set the rest to no so we have only one set
1084 def = (rand() % cnt);
1087 expr_list_for_each_sym(prop->expr, e, sym) {
1089 sym->def[S_DEF_USER].tri = yes;
1090 csym->def[S_DEF_USER].val = sym;
1093 sym->def[S_DEF_USER].tri = no;
1095 sym->flags |= SYMBOL_DEF_USER;
1096 /* clear VALID to get value calculated */
1097 sym->flags &= ~SYMBOL_VALID;
1099 csym->flags |= SYMBOL_DEF_USER;
1100 /* clear VALID to get value calculated */
1101 csym->flags &= ~(SYMBOL_VALID);
1106 void set_all_choice_values(struct symbol *csym)
1108 struct property *prop;
1112 prop = sym_get_choice_prop(csym);
1115 * Set all non-assinged choice values to no
1117 expr_list_for_each_sym(prop->expr, e, sym) {
1118 if (!sym_has_value(sym))
1119 sym->def[S_DEF_USER].tri = no;
1121 csym->flags |= SYMBOL_DEF_USER;
1122 /* clear VALID to get value calculated */
1123 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1126 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1128 struct symbol *sym, *csym;
1129 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y
1130 * pty: probability of tristate = y
1131 * ptm: probability of tristate = m
1134 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1135 * below, otherwise gcc whines about
1136 * -Wmaybe-uninitialized */
1137 if (mode == def_random) {
1139 char *env = getenv("KCONFIG_PROBABILITY");
1141 while( env && *env ) {
1143 int tmp = strtol( env, &endp, 10 );
1144 if( tmp >= 0 && tmp <= 100 ) {
1148 perror( "KCONFIG_PROBABILITY" );
1151 env = (*endp == ':') ? endp+1 : endp;
1158 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1161 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1164 pby = p[0]; pty = p[1]; ptm = p[2];
1168 if( pty+ptm > 100 ) {
1170 perror( "KCONFIG_PROBABILITY" );
1174 bool has_changed = false;
1176 sym_clear_all_valid();
1178 for_all_symbols(i, sym) {
1179 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1181 switch (sym_get_type(sym)) {
1187 sym->def[S_DEF_USER].tri = yes;
1190 sym->def[S_DEF_USER].tri = mod;
1193 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1194 sym->def[S_DEF_USER].tri = yes;
1196 sym->def[S_DEF_USER].tri = no;
1199 sym->def[S_DEF_USER].tri = no;
1201 if (sym->type == S_TRISTATE) {
1203 sym->def[S_DEF_USER].tri = yes;
1204 else if (cnt < (pty+ptm))
1205 sym->def[S_DEF_USER].tri = mod;
1206 } else if (cnt < pby)
1207 sym->def[S_DEF_USER].tri = yes;
1212 if (!(sym_is_choice(sym) && mode == def_random))
1213 sym->flags |= SYMBOL_DEF_USER;
1222 * We have different type of choice blocks.
1223 * If curr.tri equals to mod then we can select several
1224 * choice symbols in one block.
1225 * In this case we do nothing.
1226 * If curr.tri equals yes then only one symbol can be
1227 * selected in a choice block and we set it to yes,
1228 * and the rest to no.
1230 if (mode != def_random) {
1231 for_all_symbols(i, csym) {
1232 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1233 sym_is_choice_value(csym))
1234 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1238 for_all_symbols(i, csym) {
1239 if (sym_has_value(csym) || !sym_is_choice(csym))
1242 sym_calc_value(csym);
1243 if (mode == def_random)
1244 has_changed = randomize_choice_values(csym);
1246 set_all_choice_values(csym);