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) {
272 sym_calc_value(modules_sym);
276 for_all_defaults(sym_defconfig_list, prop) {
277 if (expr_calc_value(prop->visible.expr) == no ||
278 prop->expr->type != E_SYMBOL)
280 name = conf_expand_value(prop->expr->left.sym->name);
281 in = zconf_fopen(name);
283 conf_message(_("using defaults found in %s"),
293 conf_filename = name;
298 def_flags = SYMBOL_DEF << def;
299 for_all_symbols(i, sym) {
300 sym->flags |= SYMBOL_CHANGED;
301 sym->flags &= ~(def_flags|SYMBOL_VALID);
302 if (sym_is_choice(sym))
303 sym->flags |= def_flags;
308 if (sym->def[def].val)
309 free(sym->def[def].val);
312 sym->def[def].val = NULL;
313 sym->def[def].tri = no;
317 while (compat_getline(&line, &line_asize, in) != -1) {
320 if (line[0] == '#') {
321 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
323 p = strchr(line + 2 + strlen(CONFIG_), ' ');
327 if (strncmp(p, "is not set", 10))
329 if (def == S_DEF_USER) {
330 sym = sym_find(line + 2 + strlen(CONFIG_));
332 sym_add_change_count(1);
336 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
337 if (sym->type == S_UNKNOWN)
338 sym->type = S_BOOLEAN;
340 if (sym->flags & def_flags) {
341 conf_warning("override: reassigning to symbol %s", sym->name);
346 sym->def[def].tri = no;
347 sym->flags |= def_flags;
352 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
353 p = strchr(line + strlen(CONFIG_), '=');
357 p2 = strchr(p, '\n');
363 if (def == S_DEF_USER) {
364 sym = sym_find(line + strlen(CONFIG_));
366 sym_add_change_count(1);
370 sym = sym_lookup(line + strlen(CONFIG_), 0);
371 if (sym->type == S_UNKNOWN)
374 if (sym->flags & def_flags) {
375 conf_warning("override: reassigning to symbol %s", sym->name);
377 if (conf_set_sym_val(sym, def, def_flags, p))
380 if (line[0] != '\r' && line[0] != '\n')
381 conf_warning("unexpected data");
385 if (sym && sym_is_choice_value(sym)) {
386 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
387 switch (sym->def[def].tri) {
391 if (cs->def[def].tri == yes) {
392 conf_warning("%s creates inconsistent choice state", sym->name);
393 cs->flags &= ~def_flags;
397 if (cs->def[def].tri != no)
398 conf_warning("override: %s changes choice state", sym->name);
399 cs->def[def].val = sym;
402 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
409 sym_calc_value(modules_sym);
413 int conf_read(const char *name)
418 sym_set_change_count(0);
420 if (conf_read_simple(name, S_DEF_USER))
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_cmake_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
518 bool skip_unset = (arg != NULL);
521 fprintf(fp, "set(%s%s false)\n",
522 CONFIG_, sym->name, value);
524 } else if (*value == 'm') {
527 fprintf(fp, "set(%s%s true)\n", CONFIG_, sym->name, value);
531 const char *prefix = "";
533 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
535 fprintf(fp, "set(%s%s %s%s)\n",
536 CONFIG_, sym->name, prefix, value);
541 fprintf(fp, "set(%s%s %s)\n",
542 CONFIG_, sym->name, value);
551 kconfig_print_comment(FILE *fp, const char *value, void *arg)
553 const char *p = value;
557 l = strcspn(p, "\n");
561 xfwrite(p, l, 1, fp);
570 static struct conf_printer kconfig_printer_cb =
572 .print_symbol = kconfig_print_symbol,
573 .print_comment = kconfig_print_comment,
576 static struct conf_printer kconfig_printer_cmake_cb =
578 .print_symbol = kconfig_print_cmake_symbol,
579 .print_comment = kconfig_print_comment,
585 * This printer is used when generating the `include/generated/autoconf.h' file.
588 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
594 const char *suffix = "";
603 fprintf(fp, "#define %s%s%s 1\n",
604 CONFIG_, sym->name, suffix);
609 const char *prefix = "";
611 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
613 fprintf(fp, "#define %s%s %s%s\n",
614 CONFIG_, sym->name, prefix, value);
619 fprintf(fp, "#define %s%s %s\n",
620 CONFIG_, sym->name, value);
629 header_print_comment(FILE *fp, const char *value, void *arg)
631 const char *p = value;
636 l = strcspn(p, "\n");
640 xfwrite(p, l, 1, fp);
647 fprintf(fp, " */\n");
650 static struct conf_printer header_printer_cb =
652 .print_symbol = header_print_symbol,
653 .print_comment = header_print_comment,
659 * This printer is used when generating the `include/generated/tristate.conf' file.
662 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
665 if (sym->type == S_TRISTATE && *value != 'n')
666 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
669 static struct conf_printer tristate_printer_cb =
671 .print_symbol = tristate_print_symbol,
672 .print_comment = kconfig_print_comment,
675 static void conf_write_symbol(FILE *fp, struct symbol *sym,
676 struct conf_printer *printer, void *printer_arg)
685 str = sym_get_string_value(sym);
686 str = sym_escape_string_value(str);
687 printer->print_symbol(fp, sym, str, printer_arg);
691 str = sym_get_string_value(sym);
692 printer->print_symbol(fp, sym, str, printer_arg);
697 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
701 snprintf(buf, sizeof(buf),
703 "Automatically generated file; DO NOT EDIT.\n"
705 rootmenu.prompt->text);
707 printer->print_comment(fp, buf, printer_arg);
711 * Write out a minimal config.
712 * All values that has default values are skipped as this is redundant.
714 int conf_write_defconfig(const char *filename)
720 out = fopen(filename, "w");
724 sym_clear_all_valid();
726 /* Traverse all menus to find all relevant symbols */
727 menu = rootmenu.list;
733 if (!menu_is_visible(menu))
735 } else if (!sym_is_choice(sym)) {
737 if (!(sym->flags & SYMBOL_WRITE))
739 sym->flags &= ~SYMBOL_WRITE;
740 /* If we cannot change the symbol - skip */
741 if (!sym_is_changable(sym))
743 /* If symbol equals to default value - skip */
744 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
748 * If symbol is a choice value and equals to the
749 * default for a choice - skip.
750 * But only if value is bool and equal to "y" and
751 * choice is not "optional".
752 * (If choice is "optional" then all values can be "n")
754 if (sym_is_choice_value(sym)) {
758 cs = prop_get_symbol(sym_get_choice_prop(sym));
759 ds = sym_choice_default(cs);
760 if (!sym_is_optional(cs) && sym == ds) {
761 if ((sym->type == S_BOOLEAN) &&
762 sym_get_tristate_value(sym) == yes)
766 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
769 if (menu->list != NULL) {
772 else if (menu->next != NULL) {
775 while ((menu = menu->parent)) {
776 if (menu->next != NULL) {
787 int conf_write(const char *name)
792 const char *basename;
794 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
798 if (name && name[0]) {
802 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
803 strcpy(dirname, name);
804 strcat(dirname, "/");
805 basename = conf_get_configname();
806 } else if ((slash = strrchr(name, '/'))) {
807 int size = slash - name + 1;
808 memcpy(dirname, name, size);
811 basename = slash + 1;
813 basename = conf_get_configname();
817 basename = conf_get_configname();
819 sprintf(newname, "%s%s", dirname, basename);
820 env = getenv("KCONFIG_OVERWRITECONFIG");
822 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
823 out = fopen(tmpname, "w");
826 out = fopen(newname, "w");
831 conf_write_heading(out, &kconfig_printer_cb, NULL);
833 if (!conf_get_changed())
834 sym_clear_all_valid();
836 menu = rootmenu.list;
840 if (!menu_is_visible(menu))
842 str = menu_get_prompt(menu);
847 } else if (!(sym->flags & SYMBOL_CHOICE)) {
849 if (!(sym->flags & SYMBOL_WRITE))
851 sym->flags &= ~SYMBOL_WRITE;
853 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
863 else while ((menu = menu->parent)) {
873 strcat(dirname, basename);
874 strcat(dirname, ".old");
875 rename(newname, dirname);
876 if (rename(tmpname, newname))
880 conf_message(_("configuration written to %s"), newname);
882 sym_set_change_count(0);
887 static int conf_split_config(void)
890 char path[PATH_MAX+1];
896 name = conf_get_autoconfig_name();
897 conf_read_simple(name, S_DEF_AUTO);
899 if (chdir("include/generated"))
903 for_all_symbols(i, sym) {
905 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
907 if (sym->flags & SYMBOL_WRITE) {
908 if (sym->flags & SYMBOL_DEF_AUTO) {
910 * symbol has old and new value,
916 if (sym_get_tristate_value(sym) ==
917 sym->def[S_DEF_AUTO].tri)
923 if (!strcmp(sym_get_string_value(sym),
924 sym->def[S_DEF_AUTO].val))
932 * If there is no old value, only 'no' (unset)
933 * is allowed as new value.
938 if (sym_get_tristate_value(sym) == no)
945 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
946 /* There is neither an old nor a new value. */
949 * There is an old value, but no new value ('no' (unset)
950 * isn't saved in auto.conf, so the old value is always
951 * different from 'no').
954 /* Replace all '_' and append ".h" */
959 *d++ = (c == '_') ? '/' : c;
963 /* Assume directory path already exists. */
964 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
966 if (errno != ENOENT) {
971 * Create directory components,
972 * unless they exist already.
975 while ((d = strchr(d, '/'))) {
977 if (stat(path, &sb) && mkdir(path, 0755)) {
984 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
999 int conf_write_autoconf(void)
1003 FILE *out, *tristate, *out_h, *out_c;
1006 sym_clear_all_valid();
1008 file_write_dep("include/generated/auto.conf.cmd");
1010 if (conf_split_config())
1013 out = fopen(".tmpconfig", "w");
1017 tristate = fopen(".tmpconfig_tristate", "w");
1023 out_h = fopen(".tmpconfig.h", "w");
1030 out_c = fopen(".tmpconfig.cmake", "w");
1037 conf_write_heading(out, &kconfig_printer_cb, NULL);
1039 conf_write_heading(tristate, &tristate_printer_cb, NULL);
1041 conf_write_heading(out_h, &header_printer_cb, NULL);
1043 conf_write_heading(out_c, &kconfig_printer_cmake_cb, NULL);
1045 for_all_symbols(i, sym) {
1046 sym_calc_value(sym);
1047 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1050 /* write symbol to auto.conf, tristate and header files */
1051 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1053 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1055 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1057 conf_write_symbol(out_c, sym, &kconfig_printer_cmake_cb, NULL);
1064 name = getenv("KCONFIG_AUTOHEADER");
1066 name = "include/generated/autoconf.h";
1067 if (rename(".tmpconfig.h", name))
1069 name = getenv("KCONFIG_TRISTATE");
1071 name = "include/generated/tristate.conf";
1072 if (rename(".tmpconfig_tristate", name))
1074 name = getenv("KCONFIG_CMAKE");
1076 name = "config.cmake";
1077 if (rename(".tmpconfig.cmake", name))
1079 name = conf_get_autoconfig_name();
1081 * This must be the last step, kbuild has a dependency on auto.conf
1082 * and this marks the successful completion of the previous steps.
1084 if (rename(".tmpconfig", name))
1090 static int sym_change_count;
1091 static void (*conf_changed_callback)(void);
1093 void sym_set_change_count(int count)
1095 int _sym_change_count = sym_change_count;
1096 sym_change_count = count;
1097 if (conf_changed_callback &&
1098 (bool)_sym_change_count != (bool)count)
1099 conf_changed_callback();
1102 void sym_add_change_count(int count)
1104 sym_set_change_count(count + sym_change_count);
1107 bool conf_get_changed(void)
1109 return sym_change_count;
1112 void conf_set_changed_callback(void (*fn)(void))
1114 conf_changed_callback = fn;
1117 static bool randomize_choice_values(struct symbol *csym)
1119 struct property *prop;
1125 * If choice is mod then we may have more items selected
1126 * and if no then no-one.
1127 * In both cases stop.
1129 if (csym->curr.tri != yes)
1132 prop = sym_get_choice_prop(csym);
1134 /* count entries in choice block */
1136 expr_list_for_each_sym(prop->expr, e, sym)
1140 * find a random value and set it to yes,
1141 * set the rest to no so we have only one set
1143 def = (rand() % cnt);
1146 expr_list_for_each_sym(prop->expr, e, sym) {
1148 sym->def[S_DEF_USER].tri = yes;
1149 csym->def[S_DEF_USER].val = sym;
1152 sym->def[S_DEF_USER].tri = no;
1154 sym->flags |= SYMBOL_DEF_USER;
1155 /* clear VALID to get value calculated */
1156 sym->flags &= ~SYMBOL_VALID;
1158 csym->flags |= SYMBOL_DEF_USER;
1159 /* clear VALID to get value calculated */
1160 csym->flags &= ~(SYMBOL_VALID);
1165 void set_all_choice_values(struct symbol *csym)
1167 struct property *prop;
1171 prop = sym_get_choice_prop(csym);
1174 * Set all non-assinged choice values to no
1176 expr_list_for_each_sym(prop->expr, e, sym) {
1177 if (!sym_has_value(sym))
1178 sym->def[S_DEF_USER].tri = no;
1180 csym->flags |= SYMBOL_DEF_USER;
1181 /* clear VALID to get value calculated */
1182 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1185 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1187 struct symbol *sym, *csym;
1188 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y
1189 * pty: probability of tristate = y
1190 * ptm: probability of tristate = m
1193 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1194 * below, otherwise gcc whines about
1195 * -Wmaybe-uninitialized */
1196 if (mode == def_random) {
1198 char *env = getenv("KCONFIG_PROBABILITY");
1200 while( env && *env ) {
1202 int tmp = strtol( env, &endp, 10 );
1203 if( tmp >= 0 && tmp <= 100 ) {
1207 perror( "KCONFIG_PROBABILITY" );
1210 env = (*endp == ':') ? endp+1 : endp;
1217 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1220 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1223 pby = p[0]; pty = p[1]; ptm = p[2];
1227 if( pty+ptm > 100 ) {
1229 perror( "KCONFIG_PROBABILITY" );
1233 bool has_changed = false;
1235 for_all_symbols(i, sym) {
1236 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1238 switch (sym_get_type(sym)) {
1244 sym->def[S_DEF_USER].tri = yes;
1247 sym->def[S_DEF_USER].tri = mod;
1250 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1251 sym->def[S_DEF_USER].tri = yes;
1253 sym->def[S_DEF_USER].tri = no;
1256 sym->def[S_DEF_USER].tri = no;
1258 if (sym->type == S_TRISTATE) {
1260 sym->def[S_DEF_USER].tri = yes;
1261 else if (cnt < (pty+ptm))
1262 sym->def[S_DEF_USER].tri = mod;
1263 } else if (cnt < pby)
1264 sym->def[S_DEF_USER].tri = yes;
1269 if (!(sym_is_choice(sym) && mode == def_random))
1270 sym->flags |= SYMBOL_DEF_USER;
1278 sym_clear_all_valid();
1281 * We have different type of choice blocks.
1282 * If curr.tri equals to mod then we can select several
1283 * choice symbols in one block.
1284 * In this case we do nothing.
1285 * If curr.tri equals yes then only one symbol can be
1286 * selected in a choice block and we set it to yes,
1287 * and the rest to no.
1289 if (mode != def_random) {
1290 for_all_symbols(i, csym) {
1291 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1292 sym_is_choice_value(csym))
1293 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1297 for_all_symbols(i, csym) {
1298 if (sym_has_value(csym) || !sym_is_choice(csym))
1301 sym_calc_value(csym);
1302 if (mode == def_random)
1303 has_changed = randomize_choice_values(csym);
1305 set_all_choice_values(csym);