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[] = "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 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) {
271 sym_calc_value(modules_sym);
275 for_all_defaults(sym_defconfig_list, prop) {
276 if (expr_calc_value(prop->visible.expr) == no ||
277 prop->expr->type != E_SYMBOL)
279 name = conf_expand_value(prop->expr->left.sym->name);
280 in = zconf_fopen(name);
282 conf_message(_("using defaults found in %s"),
292 conf_filename = name;
297 def_flags = SYMBOL_DEF << def;
298 for_all_symbols(i, sym) {
299 sym->flags |= SYMBOL_CHANGED;
300 sym->flags &= ~(def_flags|SYMBOL_VALID);
301 if (sym_is_choice(sym))
302 sym->flags |= def_flags;
307 if (sym->def[def].val)
308 free(sym->def[def].val);
311 sym->def[def].val = NULL;
312 sym->def[def].tri = no;
316 while (compat_getline(&line, &line_asize, in) != -1) {
319 if (line[0] == '#') {
320 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
322 p = strchr(line + 2 + strlen(CONFIG_), ' ');
326 if (strncmp(p, "is not set", 10))
328 if (def == S_DEF_USER) {
329 sym = sym_find(line + 2 + strlen(CONFIG_));
331 sym_add_change_count(1);
335 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
336 if (sym->type == S_UNKNOWN)
337 sym->type = S_BOOLEAN;
339 if (sym->flags & def_flags) {
340 conf_warning("override: reassigning to symbol %s", sym->name);
345 sym->def[def].tri = no;
346 sym->flags |= def_flags;
351 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
352 p = strchr(line + strlen(CONFIG_), '=');
356 p2 = strchr(p, '\n');
362 if (def == S_DEF_USER) {
363 sym = sym_find(line + strlen(CONFIG_));
365 sym_add_change_count(1);
369 sym = sym_lookup(line + strlen(CONFIG_), 0);
370 if (sym->type == S_UNKNOWN)
373 if (sym->flags & def_flags) {
374 conf_warning("override: reassigning to symbol %s", sym->name);
376 if (conf_set_sym_val(sym, def, def_flags, p))
379 if (line[0] != '\r' && line[0] != '\n')
380 conf_warning("unexpected data");
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);
406 sym_calc_value(modules_sym);
410 int conf_read(const char *name)
415 sym_set_change_count(0);
417 if (conf_read_simple(name, S_DEF_USER))
420 for_all_symbols(i, sym) {
422 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
424 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
425 /* check that calculated value agrees with saved value */
429 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
431 if (!sym_is_choice(sym))
435 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
439 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
440 /* no previous value and not saved */
443 /* maybe print value in verbose mode... */
446 for_all_symbols(i, sym) {
447 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
448 /* Reset values of generates values, so they'll appear
449 * as new, if they should become visible, but that
450 * doesn't quite work if the Kconfig and the saved
451 * configuration disagree.
453 if (sym->visible == no && !conf_unsaved)
454 sym->flags &= ~SYMBOL_DEF_USER;
459 /* Reset a string value if it's out of range */
460 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
462 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
471 sym_add_change_count(conf_warnings || conf_unsaved);
477 * Kconfig configuration printer
479 * This printer is used when generating the resulting configuration after
480 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
481 * passing a non-NULL argument to the printer.
485 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
492 bool skip_unset = (arg != NULL);
495 fprintf(fp, "# %s%s is not set\n",
504 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
508 kconfig_print_cmake_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
515 bool skip_unset = (arg != NULL);
518 fprintf(fp, "set(%s%s false)\n",
519 CONFIG_, sym->name, value);
521 } else if (*value == 'm') {
524 fprintf(fp, "set(%s%s true)\n", CONFIG_, sym->name, value);
528 const char *prefix = "";
530 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
532 fprintf(fp, "set(%s%s %s%s)\n",
533 CONFIG_, sym->name, prefix, value);
538 fprintf(fp, "set(%s%s %s)\n",
539 CONFIG_, sym->name, value);
548 kconfig_print_comment(FILE *fp, const char *value, void *arg)
550 const char *p = value;
554 l = strcspn(p, "\n");
558 xfwrite(p, l, 1, fp);
567 static struct conf_printer kconfig_printer_cb =
569 .print_symbol = kconfig_print_symbol,
570 .print_comment = kconfig_print_comment,
573 static struct conf_printer kconfig_printer_cmake_cb =
575 .print_symbol = kconfig_print_cmake_symbol,
576 .print_comment = kconfig_print_comment,
582 * This printer is used when generating the `include/generated/autoconf.h' file.
585 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
591 const char *suffix = "";
600 fprintf(fp, "#define %s%s%s 1\n",
601 CONFIG_, sym->name, suffix);
606 const char *prefix = "";
608 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
610 fprintf(fp, "#define %s%s %s%s\n",
611 CONFIG_, sym->name, prefix, value);
616 fprintf(fp, "#define %s%s %s\n",
617 CONFIG_, sym->name, value);
626 header_print_comment(FILE *fp, const char *value, void *arg)
628 const char *p = value;
633 l = strcspn(p, "\n");
637 xfwrite(p, l, 1, fp);
644 fprintf(fp, " */\n");
647 static struct conf_printer header_printer_cb =
649 .print_symbol = header_print_symbol,
650 .print_comment = header_print_comment,
656 * This printer is used when generating the `include/generated/tristate.conf' file.
659 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
662 if (sym->type == S_TRISTATE && *value != 'n')
663 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
666 static struct conf_printer tristate_printer_cb =
668 .print_symbol = tristate_print_symbol,
669 .print_comment = kconfig_print_comment,
672 static void conf_write_symbol(FILE *fp, struct symbol *sym,
673 struct conf_printer *printer, void *printer_arg)
682 str = sym_get_string_value(sym);
683 str = sym_escape_string_value(str);
684 printer->print_symbol(fp, sym, str, printer_arg);
688 str = sym_get_string_value(sym);
689 printer->print_symbol(fp, sym, str, printer_arg);
694 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
698 snprintf(buf, sizeof(buf),
700 "Automatically generated file; DO NOT EDIT.\n"
702 rootmenu.prompt->text);
704 printer->print_comment(fp, buf, printer_arg);
708 * Write out a minimal config.
709 * All values that has default values are skipped as this is redundant.
711 int conf_write_defconfig(const char *filename)
717 out = fopen(filename, "w");
721 sym_clear_all_valid();
723 /* Traverse all menus to find all relevant symbols */
724 menu = rootmenu.list;
730 if (!menu_is_visible(menu))
732 } else if (!sym_is_choice(sym)) {
734 if (!(sym->flags & SYMBOL_WRITE))
736 sym->flags &= ~SYMBOL_WRITE;
737 /* If we cannot change the symbol - skip */
738 if (!sym_is_changable(sym))
740 /* If symbol equals to default value - skip */
741 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
745 * If symbol is a choice value and equals to the
746 * default for a choice - skip.
747 * But only if value is bool and equal to "y" and
748 * choice is not "optional".
749 * (If choice is "optional" then all values can be "n")
751 if (sym_is_choice_value(sym)) {
755 cs = prop_get_symbol(sym_get_choice_prop(sym));
756 ds = sym_choice_default(cs);
757 if (!sym_is_optional(cs) && sym == ds) {
758 if ((sym->type == S_BOOLEAN) &&
759 sym_get_tristate_value(sym) == yes)
763 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
766 if (menu->list != NULL) {
769 else if (menu->next != NULL) {
772 while ((menu = menu->parent)) {
773 if (menu->next != NULL) {
784 int conf_write(const char *name)
789 const char *basename;
791 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
795 if (name && name[0]) {
799 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
800 strcpy(dirname, name);
801 strcat(dirname, "/");
802 basename = conf_get_configname();
803 } else if ((slash = strrchr(name, '/'))) {
804 int size = slash - name + 1;
805 memcpy(dirname, name, size);
808 basename = slash + 1;
810 basename = conf_get_configname();
814 basename = conf_get_configname();
816 sprintf(newname, "%s%s", dirname, basename);
817 env = getenv("KCONFIG_OVERWRITECONFIG");
819 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
820 out = fopen(tmpname, "w");
823 out = fopen(newname, "w");
828 conf_write_heading(out, &kconfig_printer_cb, NULL);
830 if (!conf_get_changed())
831 sym_clear_all_valid();
833 menu = rootmenu.list;
837 if (!menu_is_visible(menu))
839 str = menu_get_prompt(menu);
844 } else if (!(sym->flags & SYMBOL_CHOICE)) {
846 if (!(sym->flags & SYMBOL_WRITE))
848 sym->flags &= ~SYMBOL_WRITE;
850 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
860 else while ((menu = menu->parent)) {
870 strcat(dirname, basename);
871 strcat(dirname, ".old");
872 rename(newname, dirname);
873 if (rename(tmpname, newname))
877 conf_message(_("configuration written to %s"), newname);
879 sym_set_change_count(0);
884 static int conf_split_config(void)
887 char path[PATH_MAX+1];
893 name = conf_get_autoconfig_name();
894 conf_read_simple(name, S_DEF_AUTO);
896 if (chdir("include/generated"))
900 for_all_symbols(i, sym) {
902 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
904 if (sym->flags & SYMBOL_WRITE) {
905 if (sym->flags & SYMBOL_DEF_AUTO) {
907 * symbol has old and new value,
913 if (sym_get_tristate_value(sym) ==
914 sym->def[S_DEF_AUTO].tri)
920 if (!strcmp(sym_get_string_value(sym),
921 sym->def[S_DEF_AUTO].val))
929 * If there is no old value, only 'no' (unset)
930 * is allowed as new value.
935 if (sym_get_tristate_value(sym) == no)
942 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
943 /* There is neither an old nor a new value. */
946 * There is an old value, but no new value ('no' (unset)
947 * isn't saved in auto.conf, so the old value is always
948 * different from 'no').
951 /* Replace all '_' and append ".h" */
956 *d++ = (c == '_') ? '/' : c;
960 /* Assume directory path already exists. */
961 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
963 if (errno != ENOENT) {
968 * Create directory components,
969 * unless they exist already.
972 while ((d = strchr(d, '/'))) {
974 if (stat(path, &sb) && mkdir(path, 0755)) {
981 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
996 int conf_write_autoconf(void)
1000 FILE *out, *tristate, *out_h, *out_c;
1003 sym_clear_all_valid();
1005 file_write_dep("include/generated/auto.conf.cmd");
1007 if (conf_split_config())
1010 out = fopen(".tmpconfig", "w");
1014 tristate = fopen(".tmpconfig_tristate", "w");
1020 out_h = fopen(".tmpconfig.h", "w");
1027 out_c = fopen(".tmpconfig.cmake", "w");
1034 conf_write_heading(out, &kconfig_printer_cb, NULL);
1036 conf_write_heading(tristate, &tristate_printer_cb, NULL);
1038 conf_write_heading(out_h, &header_printer_cb, NULL);
1040 conf_write_heading(out_c, &kconfig_printer_cmake_cb, NULL);
1042 for_all_symbols(i, sym) {
1043 sym_calc_value(sym);
1044 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1047 /* write symbol to auto.conf, tristate and header files */
1048 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1050 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1052 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1054 conf_write_symbol(out_c, sym, &kconfig_printer_cmake_cb, NULL);
1061 name = getenv("KCONFIG_AUTOHEADER");
1063 name = "include/generated/autoconf.h";
1064 if (rename(".tmpconfig.h", name))
1066 name = getenv("KCONFIG_TRISTATE");
1068 name = "include/generated/tristate.conf";
1069 if (rename(".tmpconfig_tristate", name))
1071 name = getenv("KCONFIG_CMAKE");
1073 name = "config.cmake";
1074 if (rename(".tmpconfig.cmake", name))
1076 name = conf_get_autoconfig_name();
1078 * This must be the last step, kbuild has a dependency on auto.conf
1079 * and this marks the successful completion of the previous steps.
1081 if (rename(".tmpconfig", name))
1087 static int sym_change_count;
1088 static void (*conf_changed_callback)(void);
1090 void sym_set_change_count(int count)
1092 int _sym_change_count = sym_change_count;
1093 sym_change_count = count;
1094 if (conf_changed_callback &&
1095 (bool)_sym_change_count != (bool)count)
1096 conf_changed_callback();
1099 void sym_add_change_count(int count)
1101 sym_set_change_count(count + sym_change_count);
1104 bool conf_get_changed(void)
1106 return sym_change_count;
1109 void conf_set_changed_callback(void (*fn)(void))
1111 conf_changed_callback = fn;
1114 static bool randomize_choice_values(struct symbol *csym)
1116 struct property *prop;
1122 * If choice is mod then we may have more items selected
1123 * and if no then no-one.
1124 * In both cases stop.
1126 if (csym->curr.tri != yes)
1129 prop = sym_get_choice_prop(csym);
1131 /* count entries in choice block */
1133 expr_list_for_each_sym(prop->expr, e, sym)
1137 * find a random value and set it to yes,
1138 * set the rest to no so we have only one set
1140 def = (rand() % cnt);
1143 expr_list_for_each_sym(prop->expr, e, sym) {
1145 sym->def[S_DEF_USER].tri = yes;
1146 csym->def[S_DEF_USER].val = sym;
1149 sym->def[S_DEF_USER].tri = no;
1151 sym->flags |= SYMBOL_DEF_USER;
1152 /* clear VALID to get value calculated */
1153 sym->flags &= ~SYMBOL_VALID;
1155 csym->flags |= SYMBOL_DEF_USER;
1156 /* clear VALID to get value calculated */
1157 csym->flags &= ~(SYMBOL_VALID);
1162 void set_all_choice_values(struct symbol *csym)
1164 struct property *prop;
1168 prop = sym_get_choice_prop(csym);
1171 * Set all non-assinged choice values to no
1173 expr_list_for_each_sym(prop->expr, e, sym) {
1174 if (!sym_has_value(sym))
1175 sym->def[S_DEF_USER].tri = no;
1177 csym->flags |= SYMBOL_DEF_USER;
1178 /* clear VALID to get value calculated */
1179 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1182 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1184 struct symbol *sym, *csym;
1185 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y
1186 * pty: probability of tristate = y
1187 * ptm: probability of tristate = m
1190 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1191 * below, otherwise gcc whines about
1192 * -Wmaybe-uninitialized */
1193 if (mode == def_random) {
1195 char *env = getenv("KCONFIG_PROBABILITY");
1197 while( env && *env ) {
1199 int tmp = strtol( env, &endp, 10 );
1200 if( tmp >= 0 && tmp <= 100 ) {
1204 perror( "KCONFIG_PROBABILITY" );
1207 env = (*endp == ':') ? endp+1 : endp;
1214 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1217 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1220 pby = p[0]; pty = p[1]; ptm = p[2];
1224 if( pty+ptm > 100 ) {
1226 perror( "KCONFIG_PROBABILITY" );
1230 bool has_changed = false;
1232 for_all_symbols(i, sym) {
1233 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1235 switch (sym_get_type(sym)) {
1241 sym->def[S_DEF_USER].tri = yes;
1244 sym->def[S_DEF_USER].tri = mod;
1247 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1248 sym->def[S_DEF_USER].tri = yes;
1250 sym->def[S_DEF_USER].tri = no;
1253 sym->def[S_DEF_USER].tri = no;
1255 if (sym->type == S_TRISTATE) {
1257 sym->def[S_DEF_USER].tri = yes;
1258 else if (cnt < (pty+ptm))
1259 sym->def[S_DEF_USER].tri = mod;
1260 } else if (cnt < pby)
1261 sym->def[S_DEF_USER].tri = yes;
1266 if (!(sym_is_choice(sym) && mode == def_random))
1267 sym->flags |= SYMBOL_DEF_USER;
1275 sym_clear_all_valid();
1278 * We have different type of choice blocks.
1279 * If curr.tri equals to mod then we can select several
1280 * choice symbols in one block.
1281 * In this case we do nothing.
1282 * If curr.tri equals yes then only one symbol can be
1283 * selected in a choice block and we set it to yes,
1284 * and the rest to no.
1286 if (mode != def_random) {
1287 for_all_symbols(i, csym) {
1288 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1289 sym_is_choice_value(csym))
1290 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1294 for_all_symbols(i, csym) {
1295 if (sym_has_value(csym) || !sym_is_choice(csym))
1298 sym_calc_value(csym);
1299 if (mode == def_random)
1300 has_changed = randomize_choice_values(csym);
1302 set_all_choice_values(csym);