2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
19 static void conf_warning(const char *fmt, ...)
20 __attribute__ ((format (printf, 1, 2)));
22 static void conf_message(const char *fmt, ...)
23 __attribute__ ((format (printf, 1, 2)));
25 static const char *conf_filename;
26 static int conf_lineno, conf_warnings, conf_unsaved;
28 const char conf_defname[] = "include/generated/defconfig";
30 static void conf_warning(const char *fmt, ...)
34 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
35 vfprintf(stderr, fmt, ap);
36 fprintf(stderr, "\n");
41 static void conf_default_message_callback(const char *fmt, va_list ap)
48 static void (*conf_message_callback) (const char *fmt, va_list ap) =
49 conf_default_message_callback;
50 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
52 conf_message_callback = fn;
55 static void conf_message(const char *fmt, ...)
60 if (conf_message_callback)
61 conf_message_callback(fmt, ap);
64 const char *conf_get_configname(void)
66 char *name = getenv("KCONFIG_CONFIG");
68 return name ? name : ".config";
71 const char *conf_get_autoconfig_name(void)
73 char *name = getenv("KCONFIG_AUTOCONFIG");
75 return name ? name : "include/generated/auto.conf";
78 static char *conf_expand_value(const char *in)
82 static char res_value[SYMBOL_MAXLENGTH];
83 char *dst, name[SYMBOL_MAXLENGTH];
87 while ((src = strchr(in, '$'))) {
88 strncat(res_value, in, src - in);
91 while (isalnum(*src) || *src == '_')
94 sym = sym_lookup(name, 0);
96 strcat(res_value, sym_get_string_value(sym));
99 strcat(res_value, in);
104 char *conf_get_default_confname(void)
107 static char fullname[PATH_MAX+1];
110 name = conf_expand_value(conf_defname);
111 env = getenv(SRCTREE);
113 sprintf(fullname, "%s/%s", env, name);
114 if (!stat(fullname, &buf))
120 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
127 sym->def[def].tri = mod;
128 sym->flags |= def_flags;
134 sym->def[def].tri = yes;
135 sym->flags |= def_flags;
139 sym->def[def].tri = no;
140 sym->flags |= def_flags;
143 if (def != S_DEF_AUTO)
144 conf_warning("symbol value '%s' invalid for %s",
149 for (p2 = p; *p2 && !isspace(*p2); p2++)
151 sym->type = S_STRING;
158 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
163 memmove(p2, p2 + 1, strlen(p2));
166 if (def != S_DEF_AUTO)
167 conf_warning("invalid string found");
174 if (sym_string_valid(sym, p)) {
175 sym->def[def].val = strdup(p);
176 sym->flags |= def_flags;
178 if (def != S_DEF_AUTO)
179 conf_warning("symbol value '%s' invalid for %s",
190 #define LINE_GROWTH 16
191 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
194 size_t new_size = slen + 1;
196 new_size += LINE_GROWTH - 1;
198 nline = realloc(*lineptr, new_size);
206 (*lineptr)[slen] = c;
211 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
213 char *line = *lineptr;
217 int c = getc(stream);
221 if (add_byte(c, &line, slen, n) < 0)
226 if (add_byte('\0', &line, slen, n) < 0)
233 if (add_byte(c, &line, slen, n) < 0)
245 int conf_read_simple(const char *name, int def)
249 size_t line_asize = 0;
255 in = zconf_fopen(name);
257 struct property *prop;
259 name = conf_get_configname();
260 in = zconf_fopen(name);
263 sym_add_change_count(1);
264 if (!sym_defconfig_list) {
266 sym_calc_value(modules_sym);
270 for_all_defaults(sym_defconfig_list, prop) {
271 if (expr_calc_value(prop->visible.expr) == no ||
272 prop->expr->type != E_SYMBOL)
274 name = conf_expand_value(prop->expr->left.sym->name);
275 in = zconf_fopen(name);
277 conf_message(_("using defaults found in %s"),
287 conf_filename = name;
292 def_flags = SYMBOL_DEF << def;
293 for_all_symbols(i, sym) {
294 sym->flags |= SYMBOL_CHANGED;
295 sym->flags &= ~(def_flags|SYMBOL_VALID);
296 if (sym_is_choice(sym))
297 sym->flags |= def_flags;
302 if (sym->def[def].val)
303 free(sym->def[def].val);
306 sym->def[def].val = NULL;
307 sym->def[def].tri = no;
311 while (compat_getline(&line, &line_asize, in) != -1) {
314 if (line[0] == '#') {
315 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
317 p = strchr(line + 2 + strlen(CONFIG_), ' ');
321 if (strncmp(p, "is not set", 10))
323 if (def == S_DEF_USER) {
324 sym = sym_find(line + 2 + strlen(CONFIG_));
326 sym_add_change_count(1);
330 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
331 if (sym->type == S_UNKNOWN)
332 sym->type = S_BOOLEAN;
334 if (sym->flags & def_flags) {
335 conf_warning("override: reassigning to symbol %s", sym->name);
340 sym->def[def].tri = no;
341 sym->flags |= def_flags;
346 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
347 p = strchr(line + strlen(CONFIG_), '=');
351 p2 = strchr(p, '\n');
357 if (def == S_DEF_USER) {
358 sym = sym_find(line + strlen(CONFIG_));
360 sym_add_change_count(1);
364 sym = sym_lookup(line + strlen(CONFIG_), 0);
365 if (sym->type == S_UNKNOWN)
368 if (sym->flags & def_flags) {
369 conf_warning("override: reassigning to symbol %s", sym->name);
371 if (conf_set_sym_val(sym, def, def_flags, p))
374 if (line[0] != '\r' && line[0] != '\n')
375 conf_warning("unexpected data");
379 if (sym && sym_is_choice_value(sym)) {
380 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
381 switch (sym->def[def].tri) {
385 if (cs->def[def].tri == yes) {
386 conf_warning("%s creates inconsistent choice state", sym->name);
387 cs->flags &= ~def_flags;
391 if (cs->def[def].tri != no)
392 conf_warning("override: %s changes choice state", sym->name);
393 cs->def[def].val = sym;
396 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
403 sym_calc_value(modules_sym);
407 int conf_read(const char *name)
412 sym_set_change_count(0);
414 if (conf_read_simple(name, S_DEF_USER))
417 for_all_symbols(i, sym) {
419 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
421 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
422 /* check that calculated value agrees with saved value */
426 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
428 if (!sym_is_choice(sym))
432 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
436 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
437 /* no previous value and not saved */
440 /* maybe print value in verbose mode... */
443 for_all_symbols(i, sym) {
444 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
445 /* Reset values of generates values, so they'll appear
446 * as new, if they should become visible, but that
447 * doesn't quite work if the Kconfig and the saved
448 * configuration disagree.
450 if (sym->visible == no && !conf_unsaved)
451 sym->flags &= ~SYMBOL_DEF_USER;
456 /* Reset a string value if it's out of range */
457 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
459 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
468 sym_add_change_count(conf_warnings || conf_unsaved);
474 * Kconfig configuration printer
476 * This printer is used when generating the resulting configuration after
477 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
478 * passing a non-NULL argument to the printer.
482 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
489 bool skip_unset = (arg != NULL);
492 fprintf(fp, "# %s%s is not set\n",
501 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
505 kconfig_print_cmake_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
512 bool skip_unset = (arg != NULL);
515 fprintf(fp, "set(%s%s false)\n",
516 CONFIG_, sym->name, value);
518 } else if (*value == 'm') {
521 fprintf(fp, "set(%s%s true)\n", CONFIG_, sym->name, value);
525 const char *prefix = "";
527 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
529 fprintf(fp, "set(%s%s %s%s)\n",
530 CONFIG_, sym->name, prefix, value);
535 fprintf(fp, "set(%s%s %s)\n",
536 CONFIG_, sym->name, value);
545 kconfig_print_comment(FILE *fp, const char *value, void *arg)
547 const char *p = value;
551 l = strcspn(p, "\n");
555 xfwrite(p, l, 1, fp);
564 static struct conf_printer kconfig_printer_cb =
566 .print_symbol = kconfig_print_symbol,
567 .print_comment = kconfig_print_comment,
570 static struct conf_printer kconfig_printer_cmake_cb =
572 .print_symbol = kconfig_print_cmake_symbol,
573 .print_comment = kconfig_print_comment,
579 * This printer is used when generating the `include/generated/autoconf.h' file.
582 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
588 const char *suffix = "";
597 fprintf(fp, "#define %s%s%s 1\n",
598 CONFIG_, sym->name, suffix);
603 const char *prefix = "";
605 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
607 fprintf(fp, "#define %s%s %s%s\n",
608 CONFIG_, sym->name, prefix, value);
613 fprintf(fp, "#define %s%s %s\n",
614 CONFIG_, sym->name, value);
623 header_print_comment(FILE *fp, const char *value, void *arg)
625 const char *p = value;
630 l = strcspn(p, "\n");
634 xfwrite(p, l, 1, fp);
641 fprintf(fp, " */\n");
644 static struct conf_printer header_printer_cb =
646 .print_symbol = header_print_symbol,
647 .print_comment = header_print_comment,
653 * This printer is used when generating the `include/generated/tristate.conf' file.
656 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
659 if (sym->type == S_TRISTATE && *value != 'n')
660 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
663 static struct conf_printer tristate_printer_cb =
665 .print_symbol = tristate_print_symbol,
666 .print_comment = kconfig_print_comment,
669 static void conf_write_symbol(FILE *fp, struct symbol *sym,
670 struct conf_printer *printer, void *printer_arg)
679 str = sym_get_string_value(sym);
680 str = sym_escape_string_value(str);
681 printer->print_symbol(fp, sym, str, printer_arg);
685 str = sym_get_string_value(sym);
686 printer->print_symbol(fp, sym, str, printer_arg);
691 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
695 snprintf(buf, sizeof(buf),
697 "Automatically generated file; DO NOT EDIT.\n"
699 rootmenu.prompt->text);
701 printer->print_comment(fp, buf, printer_arg);
705 * Write out a minimal config.
706 * All values that has default values are skipped as this is redundant.
708 int conf_write_defconfig(const char *filename)
714 out = fopen(filename, "w");
718 sym_clear_all_valid();
720 /* Traverse all menus to find all relevant symbols */
721 menu = rootmenu.list;
727 if (!menu_is_visible(menu))
729 } else if (!sym_is_choice(sym)) {
731 if (!(sym->flags & SYMBOL_WRITE))
733 sym->flags &= ~SYMBOL_WRITE;
734 /* If we cannot change the symbol - skip */
735 if (!sym_is_changable(sym))
737 /* If symbol equals to default value - skip */
738 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
742 * If symbol is a choice value and equals to the
743 * default for a choice - skip.
744 * But only if value is bool and equal to "y" and
745 * choice is not "optional".
746 * (If choice is "optional" then all values can be "n")
748 if (sym_is_choice_value(sym)) {
752 cs = prop_get_symbol(sym_get_choice_prop(sym));
753 ds = sym_choice_default(cs);
754 if (!sym_is_optional(cs) && sym == ds) {
755 if ((sym->type == S_BOOLEAN) &&
756 sym_get_tristate_value(sym) == yes)
760 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
763 if (menu->list != NULL) {
766 else if (menu->next != NULL) {
769 while ((menu = menu->parent)) {
770 if (menu->next != NULL) {
781 int conf_write(const char *name)
786 const char *basename;
788 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
792 if (name && name[0]) {
796 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
797 strcpy(dirname, name);
798 strcat(dirname, "/");
799 basename = conf_get_configname();
800 } else if ((slash = strrchr(name, '/'))) {
801 int size = slash - name + 1;
802 memcpy(dirname, name, size);
805 basename = slash + 1;
807 basename = conf_get_configname();
811 basename = conf_get_configname();
813 sprintf(newname, "%s%s", dirname, basename);
814 env = getenv("KCONFIG_OVERWRITECONFIG");
816 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
817 out = fopen(tmpname, "w");
820 out = fopen(newname, "w");
825 conf_write_heading(out, &kconfig_printer_cb, NULL);
827 if (!conf_get_changed())
828 sym_clear_all_valid();
830 menu = rootmenu.list;
834 if (!menu_is_visible(menu))
836 str = menu_get_prompt(menu);
841 } else if (!(sym->flags & SYMBOL_CHOICE)) {
843 if (!(sym->flags & SYMBOL_WRITE))
845 sym->flags &= ~SYMBOL_WRITE;
847 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
857 else while ((menu = menu->parent)) {
867 strcat(dirname, basename);
868 strcat(dirname, ".old");
869 rename(newname, dirname);
870 if (rename(tmpname, newname))
874 conf_message(_("configuration written to %s"), newname);
876 sym_set_change_count(0);
881 static int conf_split_config(void)
884 char path[PATH_MAX+1];
890 name = conf_get_autoconfig_name();
891 conf_read_simple(name, S_DEF_AUTO);
893 if (chdir("include/generated"))
897 for_all_symbols(i, sym) {
899 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
901 if (sym->flags & SYMBOL_WRITE) {
902 if (sym->flags & SYMBOL_DEF_AUTO) {
904 * symbol has old and new value,
910 if (sym_get_tristate_value(sym) ==
911 sym->def[S_DEF_AUTO].tri)
917 if (!strcmp(sym_get_string_value(sym),
918 sym->def[S_DEF_AUTO].val))
926 * If there is no old value, only 'no' (unset)
927 * is allowed as new value.
932 if (sym_get_tristate_value(sym) == no)
939 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
940 /* There is neither an old nor a new value. */
943 * There is an old value, but no new value ('no' (unset)
944 * isn't saved in auto.conf, so the old value is always
945 * different from 'no').
948 /* Replace all '_' and append ".h" */
953 *d++ = (c == '_') ? '/' : c;
957 /* Assume directory path already exists. */
958 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
960 if (errno != ENOENT) {
965 * Create directory components,
966 * unless they exist already.
969 while ((d = strchr(d, '/'))) {
971 if (stat(path, &sb) && mkdir(path, 0755)) {
978 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
993 int conf_write_autoconf(void)
997 FILE *out, *tristate, *out_h, *out_c;
1000 sym_clear_all_valid();
1002 file_write_dep("include/generated/auto.conf.cmd");
1004 if (conf_split_config())
1007 out = fopen(".tmpconfig", "w");
1011 tristate = fopen(".tmpconfig_tristate", "w");
1017 out_h = fopen(".tmpconfig.h", "w");
1024 out_c = fopen(".tmpconfig.cmake", "w");
1031 conf_write_heading(out, &kconfig_printer_cb, NULL);
1033 conf_write_heading(tristate, &tristate_printer_cb, NULL);
1035 conf_write_heading(out_h, &header_printer_cb, NULL);
1037 conf_write_heading(out_c, &kconfig_printer_cmake_cb, NULL);
1039 for_all_symbols(i, sym) {
1040 sym_calc_value(sym);
1041 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1044 /* write symbol to auto.conf, tristate and header files */
1045 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1047 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1049 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1051 conf_write_symbol(out_c, sym, &kconfig_printer_cmake_cb, NULL);
1058 name = getenv("KCONFIG_AUTOHEADER");
1060 name = "include/generated/autoconf.h";
1061 if (rename(".tmpconfig.h", name))
1063 name = getenv("KCONFIG_TRISTATE");
1065 name = "include/generated/tristate.conf";
1066 if (rename(".tmpconfig_tristate", name))
1068 name = getenv("KCONFIG_CMAKE");
1070 name = "config.cmake";
1071 if (rename(".tmpconfig.cmake", name))
1073 name = conf_get_autoconfig_name();
1075 * This must be the last step, kbuild has a dependency on auto.conf
1076 * and this marks the successful completion of the previous steps.
1078 if (rename(".tmpconfig", name))
1084 static int sym_change_count;
1085 static void (*conf_changed_callback)(void);
1087 void sym_set_change_count(int count)
1089 int _sym_change_count = sym_change_count;
1090 sym_change_count = count;
1091 if (conf_changed_callback &&
1092 (bool)_sym_change_count != (bool)count)
1093 conf_changed_callback();
1096 void sym_add_change_count(int count)
1098 sym_set_change_count(count + sym_change_count);
1101 bool conf_get_changed(void)
1103 return sym_change_count;
1106 void conf_set_changed_callback(void (*fn)(void))
1108 conf_changed_callback = fn;
1111 static bool randomize_choice_values(struct symbol *csym)
1113 struct property *prop;
1119 * If choice is mod then we may have more items selected
1120 * and if no then no-one.
1121 * In both cases stop.
1123 if (csym->curr.tri != yes)
1126 prop = sym_get_choice_prop(csym);
1128 /* count entries in choice block */
1130 expr_list_for_each_sym(prop->expr, e, sym)
1134 * find a random value and set it to yes,
1135 * set the rest to no so we have only one set
1137 def = (rand() % cnt);
1140 expr_list_for_each_sym(prop->expr, e, sym) {
1142 sym->def[S_DEF_USER].tri = yes;
1143 csym->def[S_DEF_USER].val = sym;
1146 sym->def[S_DEF_USER].tri = no;
1148 sym->flags |= SYMBOL_DEF_USER;
1149 /* clear VALID to get value calculated */
1150 sym->flags &= ~SYMBOL_VALID;
1152 csym->flags |= SYMBOL_DEF_USER;
1153 /* clear VALID to get value calculated */
1154 csym->flags &= ~(SYMBOL_VALID);
1159 void set_all_choice_values(struct symbol *csym)
1161 struct property *prop;
1165 prop = sym_get_choice_prop(csym);
1168 * Set all non-assinged choice values to no
1170 expr_list_for_each_sym(prop->expr, e, sym) {
1171 if (!sym_has_value(sym))
1172 sym->def[S_DEF_USER].tri = no;
1174 csym->flags |= SYMBOL_DEF_USER;
1175 /* clear VALID to get value calculated */
1176 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1179 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1181 struct symbol *sym, *csym;
1182 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y
1183 * pty: probability of tristate = y
1184 * ptm: probability of tristate = m
1187 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1188 * below, otherwise gcc whines about
1189 * -Wmaybe-uninitialized */
1190 if (mode == def_random) {
1192 char *env = getenv("KCONFIG_PROBABILITY");
1194 while( env && *env ) {
1196 int tmp = strtol( env, &endp, 10 );
1197 if( tmp >= 0 && tmp <= 100 ) {
1201 perror( "KCONFIG_PROBABILITY" );
1204 env = (*endp == ':') ? endp+1 : endp;
1211 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1214 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1217 pby = p[0]; pty = p[1]; ptm = p[2];
1221 if( pty+ptm > 100 ) {
1223 perror( "KCONFIG_PROBABILITY" );
1227 bool has_changed = false;
1229 for_all_symbols(i, sym) {
1230 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1232 switch (sym_get_type(sym)) {
1238 sym->def[S_DEF_USER].tri = yes;
1241 sym->def[S_DEF_USER].tri = mod;
1244 sym->def[S_DEF_USER].tri = no;
1247 sym->def[S_DEF_USER].tri = no;
1249 if (sym->type == S_TRISTATE) {
1251 sym->def[S_DEF_USER].tri = yes;
1252 else if (cnt < (pty+ptm))
1253 sym->def[S_DEF_USER].tri = mod;
1254 } else if (cnt < pby)
1255 sym->def[S_DEF_USER].tri = yes;
1260 if (!(sym_is_choice(sym) && mode == def_random))
1261 sym->flags |= SYMBOL_DEF_USER;
1269 sym_clear_all_valid();
1272 * We have different type of choice blocks.
1273 * If curr.tri equals to mod then we can select several
1274 * choice symbols in one block.
1275 * In this case we do nothing.
1276 * If curr.tri equals yes then only one symbol can be
1277 * selected in a choice block and we set it to yes,
1278 * and the rest to no.
1280 if (mode != def_random) {
1281 for_all_symbols(i, csym) {
1282 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1283 sym_is_choice_value(csym))
1284 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1288 for_all_symbols(i, csym) {
1289 if (sym_has_value(csym) || !sym_is_choice(csym))
1292 sym_calc_value(csym);
1293 if (mode == def_random)
1294 has_changed = randomize_choice_values(csym);
1296 set_all_choice_values(csym);