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[] = "arch/$ARCH/defconfig";
30 static void conf_warning(const char *fmt, ...)
34 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
35 vfprintf(stderr, fmt, ap);
36 fprintf(stderr, "\n");
41 static void conf_default_message_callback(const char *fmt, va_list ap)
48 static void (*conf_message_callback) (const char *fmt, va_list ap) =
49 conf_default_message_callback;
50 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
52 conf_message_callback = fn;
55 static void conf_message(const char *fmt, ...)
60 if (conf_message_callback)
61 conf_message_callback(fmt, ap);
65 const char *conf_get_configname(void)
67 char *name = getenv("KCONFIG_CONFIG");
69 return name ? name : ".config";
72 const char *conf_get_autoconfig_name(void)
74 char *name = getenv("KCONFIG_AUTOCONFIG");
76 return name ? name : "include/config/auto.conf";
79 static char *conf_expand_value(const char *in)
83 static char res_value[SYMBOL_MAXLENGTH];
84 char *dst, name[SYMBOL_MAXLENGTH];
88 while ((src = strchr(in, '$'))) {
89 strncat(res_value, in, src - in);
92 while (isalnum(*src) || *src == '_')
95 sym = sym_lookup(name, 0);
97 strcat(res_value, sym_get_string_value(sym));
100 strcat(res_value, in);
105 char *conf_get_default_confname(void)
108 static char fullname[PATH_MAX+1];
111 name = conf_expand_value(conf_defname);
112 env = getenv(SRCTREE);
114 sprintf(fullname, "%s/%s", env, name);
115 if (!stat(fullname, &buf))
121 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
128 sym->def[def].tri = mod;
129 sym->flags |= def_flags;
135 sym->def[def].tri = yes;
136 sym->flags |= def_flags;
140 sym->def[def].tri = no;
141 sym->flags |= def_flags;
144 if (def != S_DEF_AUTO)
145 conf_warning("symbol value '%s' invalid for %s",
150 for (p2 = p; *p2 && !isspace(*p2); p2++)
152 sym->type = S_STRING;
159 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
164 memmove(p2, p2 + 1, strlen(p2));
167 if (def != S_DEF_AUTO)
168 conf_warning("invalid string found");
175 if (sym_string_valid(sym, p)) {
176 sym->def[def].val = strdup(p);
177 sym->flags |= def_flags;
179 if (def != S_DEF_AUTO)
180 conf_warning("symbol value '%s' invalid for %s",
191 #define LINE_GROWTH 16
192 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
195 size_t new_size = slen + 1;
197 new_size += LINE_GROWTH - 1;
199 nline = realloc(*lineptr, new_size);
207 (*lineptr)[slen] = c;
212 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
214 char *line = *lineptr;
218 int c = getc(stream);
222 if (add_byte(c, &line, slen, n) < 0)
227 if (add_byte('\0', &line, slen, n) < 0)
234 if (add_byte(c, &line, slen, n) < 0)
246 int conf_read_simple(const char *name, int def)
250 size_t line_asize = 0;
256 in = zconf_fopen(name);
258 struct property *prop;
260 name = conf_get_configname();
261 in = zconf_fopen(name);
264 sym_add_change_count(1);
265 if (!sym_defconfig_list) {
267 sym_calc_value(modules_sym);
271 for_all_defaults(sym_defconfig_list, prop) {
272 if (expr_calc_value(prop->visible.expr) == no ||
273 prop->expr->type != E_SYMBOL)
275 name = conf_expand_value(prop->expr->left.sym->name);
276 in = zconf_fopen(name);
278 conf_message(_("using defaults found in %s"),
288 conf_filename = name;
293 def_flags = SYMBOL_DEF << def;
294 for_all_symbols(i, sym) {
295 sym->flags |= SYMBOL_CHANGED;
296 sym->flags &= ~(def_flags|SYMBOL_VALID);
297 if (sym_is_choice(sym))
298 sym->flags |= def_flags;
303 if (sym->def[def].val)
304 free(sym->def[def].val);
307 sym->def[def].val = NULL;
308 sym->def[def].tri = no;
312 while (compat_getline(&line, &line_asize, in) != -1) {
315 if (line[0] == '#') {
316 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
318 p = strchr(line + 2 + strlen(CONFIG_), ' ');
322 if (strncmp(p, "is not set", 10))
324 if (def == S_DEF_USER) {
325 sym = sym_find(line + 2 + strlen(CONFIG_));
327 sym_add_change_count(1);
331 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
332 if (sym->type == S_UNKNOWN)
333 sym->type = S_BOOLEAN;
335 if (sym->flags & def_flags) {
336 conf_warning("override: reassigning to symbol %s", sym->name);
341 sym->def[def].tri = no;
342 sym->flags |= def_flags;
347 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
348 p = strchr(line + strlen(CONFIG_), '=');
352 p2 = strchr(p, '\n');
358 if (def == S_DEF_USER) {
359 sym = sym_find(line + strlen(CONFIG_));
361 sym_add_change_count(1);
365 sym = sym_lookup(line + strlen(CONFIG_), 0);
366 if (sym->type == S_UNKNOWN)
369 if (sym->flags & def_flags) {
370 conf_warning("override: reassigning to symbol %s", sym->name);
372 if (conf_set_sym_val(sym, def, def_flags, p))
375 if (line[0] != '\r' && line[0] != '\n')
376 conf_warning("unexpected data");
380 if (sym && sym_is_choice_value(sym)) {
381 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
382 switch (sym->def[def].tri) {
386 if (cs->def[def].tri == yes) {
387 conf_warning("%s creates inconsistent choice state", sym->name);
388 cs->flags &= ~def_flags;
392 if (cs->def[def].tri != no)
393 conf_warning("override: %s changes choice state", sym->name);
394 cs->def[def].val = sym;
397 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
404 sym_calc_value(modules_sym);
408 int conf_read(const char *name)
413 sym_set_change_count(0);
415 if (conf_read_simple(name, S_DEF_USER))
418 for_all_symbols(i, sym) {
420 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
422 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
423 /* check that calculated value agrees with saved value */
427 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
429 if (!sym_is_choice(sym))
433 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
437 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
438 /* no previous value and not saved */
441 /* maybe print value in verbose mode... */
444 for_all_symbols(i, sym) {
445 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
446 /* Reset values of generates values, so they'll appear
447 * as new, if they should become visible, but that
448 * doesn't quite work if the Kconfig and the saved
449 * configuration disagree.
451 if (sym->visible == no && !conf_unsaved)
452 sym->flags &= ~SYMBOL_DEF_USER;
457 /* Reset a string value if it's out of range */
458 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
460 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
469 sym_add_change_count(conf_warnings || conf_unsaved);
475 * Kconfig configuration printer
477 * This printer is used when generating the resulting configuration after
478 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
479 * passing a non-NULL argument to the printer.
483 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
490 bool skip_unset = (arg != NULL);
493 fprintf(fp, "# %s%s is not set\n",
502 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
506 kconfig_print_comment(FILE *fp, const char *value, void *arg)
508 const char *p = value;
512 l = strcspn(p, "\n");
516 xfwrite(p, l, 1, fp);
525 static struct conf_printer kconfig_printer_cb =
527 .print_symbol = kconfig_print_symbol,
528 .print_comment = kconfig_print_comment,
534 * This printer is used when generating the `include/generated/autoconf.h' file.
537 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
543 const char *suffix = "";
552 fprintf(fp, "#define %s%s%s 1\n",
553 CONFIG_, sym->name, suffix);
558 const char *prefix = "";
560 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
562 fprintf(fp, "#define %s%s %s%s\n",
563 CONFIG_, sym->name, prefix, value);
568 fprintf(fp, "#define %s%s %s\n",
569 CONFIG_, sym->name, value);
578 header_print_comment(FILE *fp, const char *value, void *arg)
580 const char *p = value;
585 l = strcspn(p, "\n");
589 xfwrite(p, l, 1, fp);
596 fprintf(fp, " */\n");
599 static struct conf_printer header_printer_cb =
601 .print_symbol = header_print_symbol,
602 .print_comment = header_print_comment,
608 * This printer is used when generating the `include/config/tristate.conf' file.
611 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
614 if (sym->type == S_TRISTATE && *value != 'n')
615 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
618 static struct conf_printer tristate_printer_cb =
620 .print_symbol = tristate_print_symbol,
621 .print_comment = kconfig_print_comment,
624 static void conf_write_symbol(FILE *fp, struct symbol *sym,
625 struct conf_printer *printer, void *printer_arg)
634 str = sym_get_string_value(sym);
635 str = sym_escape_string_value(str);
636 printer->print_symbol(fp, sym, str, printer_arg);
640 str = sym_get_string_value(sym);
641 printer->print_symbol(fp, sym, str, printer_arg);
646 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
650 snprintf(buf, sizeof(buf),
652 "Automatically generated file; DO NOT EDIT.\n"
654 rootmenu.prompt->text);
656 printer->print_comment(fp, buf, printer_arg);
660 * Write out a minimal config.
661 * All values that has default values are skipped as this is redundant.
663 int conf_write_defconfig(const char *filename)
669 out = fopen(filename, "w");
673 sym_clear_all_valid();
675 /* Traverse all menus to find all relevant symbols */
676 menu = rootmenu.list;
682 if (!menu_is_visible(menu))
684 } else if (!sym_is_choice(sym)) {
686 if (!(sym->flags & SYMBOL_WRITE))
688 sym->flags &= ~SYMBOL_WRITE;
689 /* If we cannot change the symbol - skip */
690 if (!sym_is_changable(sym))
692 /* If symbol equals to default value - skip */
693 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
697 * If symbol is a choice value and equals to the
698 * default for a choice - skip.
699 * But only if value is bool and equal to "y" and
700 * choice is not "optional".
701 * (If choice is "optional" then all values can be "n")
703 if (sym_is_choice_value(sym)) {
707 cs = prop_get_symbol(sym_get_choice_prop(sym));
708 ds = sym_choice_default(cs);
709 if (!sym_is_optional(cs) && sym == ds) {
710 if ((sym->type == S_BOOLEAN) &&
711 sym_get_tristate_value(sym) == yes)
715 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
718 if (menu->list != NULL) {
721 else if (menu->next != NULL) {
724 while ((menu = menu->parent)) {
725 if (menu->next != NULL) {
736 int conf_write(const char *name)
741 const char *basename;
743 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
747 if (name && name[0]) {
751 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
752 strcpy(dirname, name);
753 strcat(dirname, "/");
754 basename = conf_get_configname();
755 } else if ((slash = strrchr(name, '/'))) {
756 int size = slash - name + 1;
757 memcpy(dirname, name, size);
760 basename = slash + 1;
762 basename = conf_get_configname();
766 basename = conf_get_configname();
768 sprintf(newname, "%s%s", dirname, basename);
769 env = getenv("KCONFIG_OVERWRITECONFIG");
771 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
772 out = fopen(tmpname, "w");
775 out = fopen(newname, "w");
780 conf_write_heading(out, &kconfig_printer_cb, NULL);
782 if (!conf_get_changed())
783 sym_clear_all_valid();
785 menu = rootmenu.list;
789 if (!menu_is_visible(menu))
791 str = menu_get_prompt(menu);
796 } else if (!(sym->flags & SYMBOL_CHOICE)) {
798 if (!(sym->flags & SYMBOL_WRITE))
800 sym->flags &= ~SYMBOL_WRITE;
802 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
812 else while ((menu = menu->parent)) {
822 strcat(dirname, basename);
823 strcat(dirname, ".old");
824 rename(newname, dirname);
825 if (rename(tmpname, newname))
829 conf_message(_("configuration written to %s"), newname);
831 sym_set_change_count(0);
836 static int conf_split_config(void)
839 char path[PATH_MAX+1];
845 name = conf_get_autoconfig_name();
846 conf_read_simple(name, S_DEF_AUTO);
848 if (chdir("include/config"))
852 for_all_symbols(i, sym) {
854 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
856 if (sym->flags & SYMBOL_WRITE) {
857 if (sym->flags & SYMBOL_DEF_AUTO) {
859 * symbol has old and new value,
865 if (sym_get_tristate_value(sym) ==
866 sym->def[S_DEF_AUTO].tri)
872 if (!strcmp(sym_get_string_value(sym),
873 sym->def[S_DEF_AUTO].val))
881 * If there is no old value, only 'no' (unset)
882 * is allowed as new value.
887 if (sym_get_tristate_value(sym) == no)
894 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
895 /* There is neither an old nor a new value. */
898 * There is an old value, but no new value ('no' (unset)
899 * isn't saved in auto.conf, so the old value is always
900 * different from 'no').
903 /* Replace all '_' and append ".h" */
908 *d++ = (c == '_') ? '/' : c;
912 /* Assume directory path already exists. */
913 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
915 if (errno != ENOENT) {
920 * Create directory components,
921 * unless they exist already.
924 while ((d = strchr(d, '/'))) {
926 if (stat(path, &sb) && mkdir(path, 0755)) {
933 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
948 int conf_write_autoconf(void)
952 FILE *out, *tristate, *out_h;
955 sym_clear_all_valid();
957 file_write_dep("include/config/auto.conf.cmd");
959 if (conf_split_config())
962 out = fopen(".tmpconfig", "w");
966 tristate = fopen(".tmpconfig_tristate", "w");
972 out_h = fopen(".tmpconfig.h", "w");
979 conf_write_heading(out, &kconfig_printer_cb, NULL);
981 conf_write_heading(tristate, &tristate_printer_cb, NULL);
983 conf_write_heading(out_h, &header_printer_cb, NULL);
985 for_all_symbols(i, sym) {
987 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
990 /* write symbol to auto.conf, tristate and header files */
991 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
993 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
995 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1001 name = getenv("KCONFIG_AUTOHEADER");
1003 name = "include/generated/autoconf.h";
1004 if (rename(".tmpconfig.h", name))
1006 name = getenv("KCONFIG_TRISTATE");
1008 name = "include/config/tristate.conf";
1009 if (rename(".tmpconfig_tristate", name))
1011 name = conf_get_autoconfig_name();
1013 * This must be the last step, kbuild has a dependency on auto.conf
1014 * and this marks the successful completion of the previous steps.
1016 if (rename(".tmpconfig", name))
1022 static int sym_change_count;
1023 static void (*conf_changed_callback)(void);
1025 void sym_set_change_count(int count)
1027 int _sym_change_count = sym_change_count;
1028 sym_change_count = count;
1029 if (conf_changed_callback &&
1030 (bool)_sym_change_count != (bool)count)
1031 conf_changed_callback();
1034 void sym_add_change_count(int count)
1036 sym_set_change_count(count + sym_change_count);
1039 bool conf_get_changed(void)
1041 return sym_change_count;
1044 void conf_set_changed_callback(void (*fn)(void))
1046 conf_changed_callback = fn;
1049 static bool randomize_choice_values(struct symbol *csym)
1051 struct property *prop;
1057 * If choice is mod then we may have more items selected
1058 * and if no then no-one.
1059 * In both cases stop.
1061 if (csym->curr.tri != yes)
1064 prop = sym_get_choice_prop(csym);
1066 /* count entries in choice block */
1068 expr_list_for_each_sym(prop->expr, e, sym)
1072 * find a random value and set it to yes,
1073 * set the rest to no so we have only one set
1075 def = (rand() % cnt);
1078 expr_list_for_each_sym(prop->expr, e, sym) {
1080 sym->def[S_DEF_USER].tri = yes;
1081 csym->def[S_DEF_USER].val = sym;
1084 sym->def[S_DEF_USER].tri = no;
1086 sym->flags |= SYMBOL_DEF_USER;
1087 /* clear VALID to get value calculated */
1088 sym->flags &= ~SYMBOL_VALID;
1090 csym->flags |= SYMBOL_DEF_USER;
1091 /* clear VALID to get value calculated */
1092 csym->flags &= ~(SYMBOL_VALID);
1097 void set_all_choice_values(struct symbol *csym)
1099 struct property *prop;
1103 prop = sym_get_choice_prop(csym);
1106 * Set all non-assinged choice values to no
1108 expr_list_for_each_sym(prop->expr, e, sym) {
1109 if (!sym_has_value(sym))
1110 sym->def[S_DEF_USER].tri = no;
1112 csym->flags |= SYMBOL_DEF_USER;
1113 /* clear VALID to get value calculated */
1114 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1117 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1119 struct symbol *sym, *csym;
1120 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y
1121 * pty: probability of tristate = y
1122 * ptm: probability of tristate = m
1125 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1126 * below, otherwise gcc whines about
1127 * -Wmaybe-uninitialized */
1128 if (mode == def_random) {
1130 char *env = getenv("KCONFIG_PROBABILITY");
1132 while( env && *env ) {
1134 int tmp = strtol( env, &endp, 10 );
1135 if( tmp >= 0 && tmp <= 100 ) {
1139 perror( "KCONFIG_PROBABILITY" );
1142 env = (*endp == ':') ? endp+1 : endp;
1149 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1152 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1155 pby = p[0]; pty = p[1]; ptm = p[2];
1159 if( pty+ptm > 100 ) {
1161 perror( "KCONFIG_PROBABILITY" );
1165 bool has_changed = false;
1167 for_all_symbols(i, sym) {
1168 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1170 switch (sym_get_type(sym)) {
1176 sym->def[S_DEF_USER].tri = yes;
1179 sym->def[S_DEF_USER].tri = mod;
1182 if (sym->flags & SYMBOL_ALLNOCONFIG_Y)
1183 sym->def[S_DEF_USER].tri = yes;
1185 sym->def[S_DEF_USER].tri = no;
1188 sym->def[S_DEF_USER].tri = no;
1190 if (sym->type == S_TRISTATE) {
1192 sym->def[S_DEF_USER].tri = yes;
1193 else if (cnt < (pty+ptm))
1194 sym->def[S_DEF_USER].tri = mod;
1195 } else if (cnt < pby)
1196 sym->def[S_DEF_USER].tri = yes;
1201 if (!(sym_is_choice(sym) && mode == def_random))
1202 sym->flags |= SYMBOL_DEF_USER;
1210 sym_clear_all_valid();
1213 * We have different type of choice blocks.
1214 * If curr.tri equals to mod then we can select several
1215 * choice symbols in one block.
1216 * In this case we do nothing.
1217 * If curr.tri equals yes then only one symbol can be
1218 * selected in a choice block and we set it to yes,
1219 * and the rest to no.
1221 if (mode != def_random) {
1222 for_all_symbols(i, csym) {
1223 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1224 sym_is_choice_value(csym))
1225 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1229 for_all_symbols(i, csym) {
1230 if (sym_has_value(csym) || !sym_is_choice(csym))
1233 sym_calc_value(csym);
1234 if (mode == def_random)
1235 has_changed = randomize_choice_values(csym);
1237 set_all_choice_values(csym);