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 *s)
53 static void (*conf_message_callback)(const char *s) =
54 conf_default_message_callback;
55 void conf_set_message_callback(void (*fn)(const char *s))
57 conf_message_callback = fn;
60 static void conf_message(const char *fmt, ...)
65 if (!conf_message_callback)
70 vsnprintf(buf, sizeof(buf), fmt, ap);
71 conf_message_callback(buf);
75 const char *conf_get_configname(void)
77 char *name = getenv("KCONFIG_CONFIG");
79 return name ? name : ".config";
82 const char *conf_get_autoconfig_name(void)
84 char *name = getenv("KCONFIG_AUTOCONFIG");
86 return name ? name : "include/generated/auto.conf";
89 char *conf_get_default_confname(void)
92 static char fullname[PATH_MAX+1];
95 name = expand_string(conf_defname);
96 env = getenv(SRCTREE);
98 sprintf(fullname, "%s/%s", env, name);
99 if (!stat(fullname, &buf))
105 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
112 sym->def[def].tri = mod;
113 sym->flags |= def_flags;
119 sym->def[def].tri = yes;
120 sym->flags |= def_flags;
124 sym->def[def].tri = no;
125 sym->flags |= def_flags;
128 if (def != S_DEF_AUTO)
129 conf_warning("symbol value '%s' invalid for %s",
134 for (p2 = p; *p2 && !isspace(*p2); p2++)
136 sym->type = S_STRING;
143 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
148 memmove(p2, p2 + 1, strlen(p2));
151 if (def != S_DEF_AUTO)
152 conf_warning("invalid string found");
159 if (sym_string_valid(sym, p)) {
160 sym->def[def].val = xstrdup(p);
161 sym->flags |= def_flags;
163 if (def != S_DEF_AUTO)
164 conf_warning("symbol value '%s' invalid for %s",
175 #define LINE_GROWTH 16
176 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
179 size_t new_size = slen + 1;
181 new_size += LINE_GROWTH - 1;
183 nline = xrealloc(*lineptr, new_size);
191 (*lineptr)[slen] = c;
196 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
198 char *line = *lineptr;
202 int c = getc(stream);
206 if (add_byte(c, &line, slen, n) < 0)
211 if (add_byte('\0', &line, slen, n) < 0)
218 if (add_byte(c, &line, slen, n) < 0)
230 int conf_read_simple(const char *name, int def)
234 size_t line_asize = 0;
240 in = zconf_fopen(name);
242 struct property *prop;
244 name = conf_get_configname();
245 in = zconf_fopen(name);
248 sym_add_change_count(1);
249 if (!sym_defconfig_list)
252 for_all_defaults(sym_defconfig_list, prop) {
253 if (expr_calc_value(prop->visible.expr) == no ||
254 prop->expr->type != E_SYMBOL)
256 sym_calc_value(prop->expr->left.sym);
257 name = sym_get_string_value(prop->expr->left.sym);
258 in = zconf_fopen(name);
260 conf_message("using defaults found in %s",
270 conf_filename = name;
274 def_flags = SYMBOL_DEF << def;
275 for_all_symbols(i, sym) {
276 sym->flags |= SYMBOL_CHANGED;
277 sym->flags &= ~(def_flags|SYMBOL_VALID);
278 if (sym_is_choice(sym))
279 sym->flags |= def_flags;
284 if (sym->def[def].val)
285 free(sym->def[def].val);
288 sym->def[def].val = NULL;
289 sym->def[def].tri = no;
293 while (compat_getline(&line, &line_asize, in) != -1) {
296 if (line[0] == '#') {
297 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
299 p = strchr(line + 2 + strlen(CONFIG_), ' ');
303 if (strncmp(p, "is not set", 10))
305 if (def == S_DEF_USER) {
306 sym = sym_find(line + 2 + strlen(CONFIG_));
308 sym_add_change_count(1);
312 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
313 if (sym->type == S_UNKNOWN)
314 sym->type = S_BOOLEAN;
316 if (sym->flags & def_flags) {
317 conf_warning("override: reassigning to symbol %s", sym->name);
322 sym->def[def].tri = no;
323 sym->flags |= def_flags;
328 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
329 p = strchr(line + strlen(CONFIG_), '=');
333 p2 = strchr(p, '\n');
339 if (def == S_DEF_USER) {
340 sym = sym_find(line + strlen(CONFIG_));
342 sym_add_change_count(1);
346 sym = sym_lookup(line + strlen(CONFIG_), 0);
347 if (sym->type == S_UNKNOWN)
350 if (sym->flags & def_flags) {
351 conf_warning("override: reassigning to symbol %s", sym->name);
353 if (conf_set_sym_val(sym, def, def_flags, p))
356 if (line[0] != '\r' && line[0] != '\n')
357 conf_warning("unexpected data: %.*s",
358 (int)strcspn(line, "\r\n"), line);
363 if (sym && sym_is_choice_value(sym)) {
364 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
365 switch (sym->def[def].tri) {
369 if (cs->def[def].tri == yes) {
370 conf_warning("%s creates inconsistent choice state", sym->name);
371 cs->flags &= ~def_flags;
375 if (cs->def[def].tri != no)
376 conf_warning("override: %s changes choice state", sym->name);
377 cs->def[def].val = sym;
380 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
388 int conf_read(const char *name)
391 int conf_unsaved = 0;
394 sym_set_change_count(0);
396 if (conf_read_simple(name, S_DEF_USER)) {
397 sym_calc_value(modules_sym);
401 sym_calc_value(modules_sym);
403 for_all_symbols(i, sym) {
405 if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE))
407 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
408 /* check that calculated value agrees with saved value */
412 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
414 if (!sym_is_choice(sym))
418 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
422 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
423 /* no previous value and not saved */
426 /* maybe print value in verbose mode... */
429 for_all_symbols(i, sym) {
430 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
431 /* Reset values of generates values, so they'll appear
432 * as new, if they should become visible, but that
433 * doesn't quite work if the Kconfig and the saved
434 * configuration disagree.
436 if (sym->visible == no && !conf_unsaved)
437 sym->flags &= ~SYMBOL_DEF_USER;
442 /* Reset a string value if it's out of range */
443 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
445 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
454 sym_add_change_count(conf_warnings || conf_unsaved);
460 * Kconfig configuration printer
462 * This printer is used when generating the resulting configuration after
463 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
464 * passing a non-NULL argument to the printer.
468 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
475 bool skip_unset = (arg != NULL);
478 fprintf(fp, "# %s%s is not set\n",
487 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
491 kconfig_print_cmake_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
498 bool skip_unset = (arg != NULL);
501 fprintf(fp, "set(%s%s false)\n",
502 CONFIG_, sym->name, value);
504 } else if (*value == 'm') {
507 fprintf(fp, "set(%s%s true)\n", CONFIG_, sym->name, value);
511 const char *prefix = "";
513 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
515 fprintf(fp, "set(%s%s %s%s)\n",
516 CONFIG_, sym->name, prefix, value);
521 fprintf(fp, "set(%s%s %s)\n",
522 CONFIG_, sym->name, value);
531 kconfig_print_comment(FILE *fp, const char *value, void *arg)
533 const char *p = value;
537 l = strcspn(p, "\n");
541 xfwrite(p, l, 1, fp);
550 static struct conf_printer kconfig_printer_cb =
552 .print_symbol = kconfig_print_symbol,
553 .print_comment = kconfig_print_comment,
556 static struct conf_printer kconfig_printer_cmake_cb =
558 .print_symbol = kconfig_print_cmake_symbol,
559 .print_comment = kconfig_print_comment,
565 * This printer is used when generating the `include/generated/autoconf.h' file.
568 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
574 const char *suffix = "";
583 fprintf(fp, "#define %s%s%s 1\n",
584 CONFIG_, sym->name, suffix);
589 const char *prefix = "";
591 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
593 fprintf(fp, "#define %s%s %s%s\n",
594 CONFIG_, sym->name, prefix, value);
599 fprintf(fp, "#define %s%s %s\n",
600 CONFIG_, sym->name, value);
609 header_print_comment(FILE *fp, const char *value, void *arg)
611 const char *p = value;
616 l = strcspn(p, "\n");
620 xfwrite(p, l, 1, fp);
627 fprintf(fp, " */\n");
630 static struct conf_printer header_printer_cb =
632 .print_symbol = header_print_symbol,
633 .print_comment = header_print_comment,
639 * This printer is used when generating the `include/generated/tristate.conf' file.
642 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
645 if (sym->type == S_TRISTATE && *value != 'n')
646 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
649 static struct conf_printer tristate_printer_cb =
651 .print_symbol = tristate_print_symbol,
652 .print_comment = kconfig_print_comment,
655 static void conf_write_symbol(FILE *fp, struct symbol *sym,
656 struct conf_printer *printer, void *printer_arg)
665 str = sym_get_string_value(sym);
666 str = sym_escape_string_value(str);
667 printer->print_symbol(fp, sym, str, printer_arg);
671 str = sym_get_string_value(sym);
672 printer->print_symbol(fp, sym, str, printer_arg);
677 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
681 snprintf(buf, sizeof(buf),
683 "Automatically generated file; DO NOT EDIT.\n"
685 rootmenu.prompt->text);
687 printer->print_comment(fp, buf, printer_arg);
691 * Write out a minimal config.
692 * All values that has default values are skipped as this is redundant.
694 int conf_write_defconfig(const char *filename)
700 out = fopen(filename, "w");
704 sym_clear_all_valid();
706 /* Traverse all menus to find all relevant symbols */
707 menu = rootmenu.list;
713 if (!menu_is_visible(menu))
715 } else if (!sym_is_choice(sym)) {
717 if (!(sym->flags & SYMBOL_WRITE))
719 sym->flags &= ~SYMBOL_WRITE;
720 /* If we cannot change the symbol - skip */
721 if (!sym_is_changable(sym))
723 /* If symbol equals to default value - skip */
724 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
728 * If symbol is a choice value and equals to the
729 * default for a choice - skip.
730 * But only if value is bool and equal to "y" and
731 * choice is not "optional".
732 * (If choice is "optional" then all values can be "n")
734 if (sym_is_choice_value(sym)) {
738 cs = prop_get_symbol(sym_get_choice_prop(sym));
739 ds = sym_choice_default(cs);
740 if (!sym_is_optional(cs) && sym == ds) {
741 if ((sym->type == S_BOOLEAN) &&
742 sym_get_tristate_value(sym) == yes)
746 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
749 if (menu->list != NULL) {
752 else if (menu->next != NULL) {
755 while ((menu = menu->parent)) {
756 if (menu->next != NULL) {
767 int conf_write(const char *name)
772 const char *basename;
774 char dirname[PATH_MAX+1], tmpname[PATH_MAX+22], newname[PATH_MAX+8];
778 if (name && name[0]) {
782 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
783 strcpy(dirname, name);
784 strcat(dirname, "/");
785 basename = conf_get_configname();
786 } else if ((slash = strrchr(name, '/'))) {
787 int size = slash - name + 1;
788 memcpy(dirname, name, size);
791 basename = slash + 1;
793 basename = conf_get_configname();
797 basename = conf_get_configname();
799 sprintf(newname, "%s%s", dirname, basename);
800 env = getenv("KCONFIG_OVERWRITECONFIG");
802 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
803 out = fopen(tmpname, "w");
806 out = fopen(newname, "w");
811 conf_write_heading(out, &kconfig_printer_cb, NULL);
813 if (!conf_get_changed())
814 sym_clear_all_valid();
816 menu = rootmenu.list;
820 if (!menu_is_visible(menu))
822 str = menu_get_prompt(menu);
827 } else if (!(sym->flags & SYMBOL_CHOICE)) {
829 if (!(sym->flags & SYMBOL_WRITE))
831 sym->flags &= ~SYMBOL_WRITE;
833 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
843 else while ((menu = menu->parent)) {
853 strcat(dirname, basename);
854 strcat(dirname, ".old");
855 rename(newname, dirname);
856 if (rename(tmpname, newname))
860 conf_message("configuration written to %s", newname);
862 sym_set_change_count(0);
867 /* write a dependency file as used by kbuild to track dependencies */
868 static int conf_write_dep(const char *name)
875 out = fopen("..config.tmp", "w");
878 fprintf(out, "deps_config := \\\n");
879 for (file = file_list; file; file = file->next) {
881 fprintf(out, "\t%s \\\n", file->name);
883 fprintf(out, "\t%s\n", file->name);
885 fprintf(out, "\n%s: \\\n"
886 "\t$(deps_config)\n\n", conf_get_autoconfig_name());
888 env_write_dep(out, conf_get_autoconfig_name());
890 fprintf(out, "\n$(deps_config): ;\n");
892 rename("..config.tmp", name);
896 static int conf_split_config(void)
899 char path[PATH_MAX+1];
905 name = conf_get_autoconfig_name();
906 conf_read_simple(name, S_DEF_AUTO);
907 sym_calc_value(modules_sym);
909 if (chdir("include/generated"))
913 for_all_symbols(i, sym) {
915 if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name)
917 if (sym->flags & SYMBOL_WRITE) {
918 if (sym->flags & SYMBOL_DEF_AUTO) {
920 * symbol has old and new value,
926 if (sym_get_tristate_value(sym) ==
927 sym->def[S_DEF_AUTO].tri)
933 if (!strcmp(sym_get_string_value(sym),
934 sym->def[S_DEF_AUTO].val))
942 * If there is no old value, only 'no' (unset)
943 * is allowed as new value.
948 if (sym_get_tristate_value(sym) == no)
955 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
956 /* There is neither an old nor a new value. */
959 * There is an old value, but no new value ('no' (unset)
960 * isn't saved in auto.conf, so the old value is always
961 * different from 'no').
964 /* Replace all '_' and append ".h" */
969 *d++ = (c == '_') ? '/' : c;
973 /* Assume directory path already exists. */
974 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
976 if (errno != ENOENT) {
981 * Create directory components,
982 * unless they exist already.
985 while ((d = strchr(d, '/'))) {
987 if (stat(path, &sb) && mkdir(path, 0755)) {
994 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
1009 int conf_write_autoconf(void)
1013 FILE *out, *tristate, *out_h, *out_c;
1016 sym_clear_all_valid();
1018 conf_write_dep("include/generated/auto.conf.cmd");
1020 if (conf_split_config())
1023 out = fopen(".tmpconfig", "w");
1027 tristate = fopen(".tmpconfig_tristate", "w");
1033 out_h = fopen(".tmpconfig.h", "w");
1040 out_c = fopen(".tmpconfig.cmake", "w");
1047 conf_write_heading(out, &kconfig_printer_cb, NULL);
1049 conf_write_heading(tristate, &tristate_printer_cb, NULL);
1051 conf_write_heading(out_h, &header_printer_cb, NULL);
1053 conf_write_heading(out_c, &kconfig_printer_cmake_cb, NULL);
1055 for_all_symbols(i, sym) {
1056 sym_calc_value(sym);
1057 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1060 /* write symbol to auto.conf, tristate and header files */
1061 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1063 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1065 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1067 conf_write_symbol(out_c, sym, &kconfig_printer_cmake_cb, NULL);
1074 name = getenv("KCONFIG_AUTOHEADER");
1076 name = "include/generated/autoconf.h";
1077 if (rename(".tmpconfig.h", name))
1079 name = getenv("KCONFIG_TRISTATE");
1081 name = "include/generated/tristate.conf";
1082 if (rename(".tmpconfig_tristate", name))
1084 name = getenv("KCONFIG_CMAKE");
1086 name = "config.cmake";
1087 if (rename(".tmpconfig.cmake", name))
1089 name = conf_get_autoconfig_name();
1091 * This must be the last step, kbuild has a dependency on auto.conf
1092 * and this marks the successful completion of the previous steps.
1094 if (rename(".tmpconfig", name))
1100 static int sym_change_count;
1101 static void (*conf_changed_callback)(void);
1103 void sym_set_change_count(int count)
1105 int _sym_change_count = sym_change_count;
1106 sym_change_count = count;
1107 if (conf_changed_callback &&
1108 (bool)_sym_change_count != (bool)count)
1109 conf_changed_callback();
1112 void sym_add_change_count(int count)
1114 sym_set_change_count(count + sym_change_count);
1117 bool conf_get_changed(void)
1119 return sym_change_count;
1122 void conf_set_changed_callback(void (*fn)(void))
1124 conf_changed_callback = fn;
1127 static bool randomize_choice_values(struct symbol *csym)
1129 struct property *prop;
1135 * If choice is mod then we may have more items selected
1136 * and if no then no-one.
1137 * In both cases stop.
1139 if (csym->curr.tri != yes)
1142 prop = sym_get_choice_prop(csym);
1144 /* count entries in choice block */
1146 expr_list_for_each_sym(prop->expr, e, sym)
1150 * find a random value and set it to yes,
1151 * set the rest to no so we have only one set
1153 def = (rand() % cnt);
1156 expr_list_for_each_sym(prop->expr, e, sym) {
1158 sym->def[S_DEF_USER].tri = yes;
1159 csym->def[S_DEF_USER].val = sym;
1162 sym->def[S_DEF_USER].tri = no;
1164 sym->flags |= SYMBOL_DEF_USER;
1165 /* clear VALID to get value calculated */
1166 sym->flags &= ~SYMBOL_VALID;
1168 csym->flags |= SYMBOL_DEF_USER;
1169 /* clear VALID to get value calculated */
1170 csym->flags &= ~(SYMBOL_VALID);
1175 void set_all_choice_values(struct symbol *csym)
1177 struct property *prop;
1181 prop = sym_get_choice_prop(csym);
1184 * Set all non-assinged choice values to no
1186 expr_list_for_each_sym(prop->expr, e, sym) {
1187 if (!sym_has_value(sym))
1188 sym->def[S_DEF_USER].tri = no;
1190 csym->flags |= SYMBOL_DEF_USER;
1191 /* clear VALID to get value calculated */
1192 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1195 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1197 struct symbol *sym, *csym;
1198 int i, cnt, pby, pty, ptm; /* pby: probability of bool = y
1199 * pty: probability of tristate = y
1200 * ptm: probability of tristate = m
1203 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1204 * below, otherwise gcc whines about
1205 * -Wmaybe-uninitialized */
1206 if (mode == def_random) {
1208 char *env = getenv("KCONFIG_PROBABILITY");
1210 while( env && *env ) {
1212 int tmp = strtol( env, &endp, 10 );
1213 if( tmp >= 0 && tmp <= 100 ) {
1217 perror( "KCONFIG_PROBABILITY" );
1220 env = (*endp == ':') ? endp+1 : endp;
1227 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1230 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1233 pby = p[0]; pty = p[1]; ptm = p[2];
1237 if( pty+ptm > 100 ) {
1239 perror( "KCONFIG_PROBABILITY" );
1243 bool has_changed = false;
1245 for_all_symbols(i, sym) {
1246 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1248 switch (sym_get_type(sym)) {
1254 sym->def[S_DEF_USER].tri = yes;
1257 sym->def[S_DEF_USER].tri = mod;
1260 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1261 sym->def[S_DEF_USER].tri = yes;
1263 sym->def[S_DEF_USER].tri = no;
1266 sym->def[S_DEF_USER].tri = no;
1268 if (sym->type == S_TRISTATE) {
1270 sym->def[S_DEF_USER].tri = yes;
1271 else if (cnt < (pty+ptm))
1272 sym->def[S_DEF_USER].tri = mod;
1273 } else if (cnt < pby)
1274 sym->def[S_DEF_USER].tri = yes;
1279 if (!(sym_is_choice(sym) && mode == def_random))
1280 sym->flags |= SYMBOL_DEF_USER;
1288 sym_clear_all_valid();
1291 * We have different type of choice blocks.
1292 * If curr.tri equals to mod then we can select several
1293 * choice symbols in one block.
1294 * In this case we do nothing.
1295 * If curr.tri equals yes then only one symbol can be
1296 * selected in a choice block and we set it to yes,
1297 * and the rest to no.
1299 if (mode != def_random) {
1300 for_all_symbols(i, csym) {
1301 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1302 sym_is_choice_value(csym))
1303 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1307 for_all_symbols(i, csym) {
1308 if (sym_has_value(csym) || !sym_is_choice(csym))
1311 sym_calc_value(csym);
1312 if (mode == def_random)
1313 has_changed = randomize_choice_values(csym);
1315 set_all_choice_values(csym);