2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
20 static void conf_warning(const char *fmt, ...)
21 __attribute__ ((format (printf, 1, 2)));
23 static void conf_message(const char *fmt, ...)
24 __attribute__ ((format (printf, 1, 2)));
26 static const char *conf_filename;
27 static int conf_lineno, conf_warnings, conf_unsaved;
29 const char conf_defname[] = ".defconfig";
31 static void conf_warning(const char *fmt, ...)
35 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
36 vfprintf(stderr, fmt, ap);
37 fprintf(stderr, "\n");
42 static void conf_default_message_callback(const char *fmt, va_list ap)
49 static void (*conf_message_callback) (const char *fmt, va_list ap) =
50 conf_default_message_callback;
51 void conf_set_message_callback(void (*fn) (const char *fmt, va_list ap))
53 conf_message_callback = fn;
56 static void conf_message(const char *fmt, ...)
61 if (conf_message_callback)
62 conf_message_callback(fmt, ap);
65 const char *conf_get_configname(void)
67 char *name = getenv("BR2_CONFIG");
69 return name ? name : ".config";
72 const char *conf_get_autoconfig_name(void)
74 return getenv("KCONFIG_AUTOCONFIG");
77 static char *conf_expand_value(const char *in)
81 static char res_value[SYMBOL_MAXLENGTH];
82 char *dst, name[SYMBOL_MAXLENGTH];
86 while ((src = strchr(in, '$'))) {
87 strncat(res_value, in, src - in);
90 while (isalnum(*src) || *src == '_')
93 sym = sym_lookup(name, 0);
95 strcat(res_value, sym_get_string_value(sym));
98 strcat(res_value, in);
103 char *conf_get_default_confname(void)
106 static char fullname[PATH_MAX+1];
109 name = conf_expand_value(conf_defname);
110 env = getenv(SRCTREE);
112 sprintf(fullname, "%s/%s", env, name);
113 if (!stat(fullname, &buf))
119 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
126 sym->def[def].tri = mod;
127 sym->flags |= def_flags;
133 sym->def[def].tri = yes;
134 sym->flags |= def_flags;
138 sym->def[def].tri = no;
139 sym->flags |= def_flags;
142 if (def != S_DEF_AUTO)
143 conf_warning("symbol value '%s' invalid for %s",
148 for (p2 = p; *p2 && !isspace(*p2); p2++)
150 sym->type = S_STRING;
157 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
162 memmove(p2, p2 + 1, strlen(p2));
165 if (def != S_DEF_AUTO)
166 conf_warning("invalid string found");
173 if (sym_string_valid(sym, p)) {
174 sym->def[def].val = strdup(p);
175 sym->flags |= def_flags;
177 if (def != S_DEF_AUTO)
178 conf_warning("symbol value '%s' invalid for %s",
189 #define LINE_GROWTH 16
190 static int add_byte(int c, char **lineptr, size_t slen, size_t *n)
193 size_t new_size = slen + 1;
195 new_size += LINE_GROWTH - 1;
197 nline = realloc(*lineptr, new_size);
205 (*lineptr)[slen] = c;
210 static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream)
212 char *line = *lineptr;
216 int c = getc(stream);
220 if (add_byte(c, &line, slen, n) < 0)
225 if (add_byte('\0', &line, slen, n) < 0)
232 if (add_byte(c, &line, slen, n) < 0)
244 int conf_read_simple(const char *name, int def)
248 size_t line_asize = 0;
254 in = zconf_fopen(name);
256 struct property *prop;
258 name = conf_get_configname();
259 in = zconf_fopen(name);
262 sym_add_change_count(1);
263 if (!sym_defconfig_list) {
265 sym_calc_value(modules_sym);
269 for_all_defaults(sym_defconfig_list, prop) {
270 if (expr_calc_value(prop->visible.expr) == no ||
271 prop->expr->type != E_SYMBOL)
273 name = conf_expand_value(prop->expr->left.sym->name);
274 in = zconf_fopen(name);
276 conf_message(_("using defaults found in %s"),
286 conf_filename = name;
291 def_flags = SYMBOL_DEF << def;
292 for_all_symbols(i, sym) {
293 sym->flags |= SYMBOL_CHANGED;
294 sym->flags &= ~(def_flags|SYMBOL_VALID);
295 if (sym_is_choice(sym))
296 sym->flags |= def_flags;
301 if (sym->def[def].val)
302 free(sym->def[def].val);
305 sym->def[def].val = NULL;
306 sym->def[def].tri = no;
310 while (compat_getline(&line, &line_asize, in) != -1) {
313 if (line[0] == '#') {
314 if (memcmp(line + 2, CONFIG_, strlen(CONFIG_)))
316 p = strchr(line + 2 + strlen(CONFIG_), ' ');
320 if (strncmp(p, "is not set", 10))
322 if (def == S_DEF_USER) {
323 sym = sym_find(line + 2 + strlen(CONFIG_));
325 sym_add_change_count(1);
329 sym = sym_lookup(line + 2 + strlen(CONFIG_), 0);
330 if (sym->type == S_UNKNOWN)
331 sym->type = S_BOOLEAN;
333 if (sym->flags & def_flags) {
334 conf_warning("override: reassigning to symbol %s", sym->name);
339 sym->def[def].tri = no;
340 sym->flags |= def_flags;
345 } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) {
346 p = strchr(line + strlen(CONFIG_), '=');
350 p2 = strchr(p, '\n');
356 if (def == S_DEF_USER) {
357 sym = sym_find(line + strlen(CONFIG_));
359 sym_add_change_count(1);
363 sym = sym_lookup(line + strlen(CONFIG_), 0);
364 if (sym->type == S_UNKNOWN)
367 if (sym->flags & def_flags) {
368 conf_warning("override: reassigning to symbol %s", sym->name);
370 if (conf_set_sym_val(sym, def, def_flags, p))
373 if (line[0] != '\r' && line[0] != '\n')
374 conf_warning("unexpected data");
378 if (sym && sym_is_choice_value(sym)) {
379 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
380 switch (sym->def[def].tri) {
384 if (cs->def[def].tri == yes) {
385 conf_warning("%s creates inconsistent choice state", sym->name);
386 cs->flags &= ~def_flags;
390 if (cs->def[def].tri != no)
391 conf_warning("override: %s changes choice state", sym->name);
392 cs->def[def].val = sym;
395 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
402 sym_calc_value(modules_sym);
406 int conf_read(const char *name)
411 sym_set_change_count(0);
413 if (conf_read_simple(name, S_DEF_USER))
416 for_all_symbols(i, sym) {
418 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
420 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
421 /* check that calculated value agrees with saved value */
425 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
427 if (!sym_is_choice(sym))
431 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
435 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
436 /* no previous value and not saved */
439 /* maybe print value in verbose mode... */
442 for_all_symbols(i, sym) {
443 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
444 /* Reset values of generates values, so they'll appear
445 * as new, if they should become visible, but that
446 * doesn't quite work if the Kconfig and the saved
447 * configuration disagree.
449 if (sym->visible == no && !conf_unsaved)
450 sym->flags &= ~SYMBOL_DEF_USER;
455 /* Reset a string value if it's out of range */
456 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
458 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
467 sym_add_change_count(conf_warnings || conf_unsaved);
473 * Kconfig configuration printer
475 * This printer is used when generating the resulting configuration after
476 * kconfig invocation and `defconfig' files. Unset symbol might be omitted by
477 * passing a non-NULL argument to the printer.
481 kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
488 bool skip_unset = (arg != NULL);
491 fprintf(fp, "# %s%s is not set\n",
500 fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value);
504 kconfig_print_comment(FILE *fp, const char *value, void *arg)
506 const char *p = value;
510 l = strcspn(p, "\n");
514 xfwrite(p, l, 1, fp);
523 static struct conf_printer kconfig_printer_cb =
525 .print_symbol = kconfig_print_symbol,
526 .print_comment = kconfig_print_comment,
532 * This printer is used when generating the `include/generated/autoconf.h' file.
535 header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
541 const char *suffix = "";
550 fprintf(fp, "#define %s%s%s 1\n",
551 CONFIG_, sym->name, suffix);
556 const char *prefix = "";
558 if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X'))
560 fprintf(fp, "#define %s%s %s%s\n",
561 CONFIG_, sym->name, prefix, value);
566 fprintf(fp, "#define %s%s %s\n",
567 CONFIG_, sym->name, value);
576 header_print_comment(FILE *fp, const char *value, void *arg)
578 const char *p = value;
583 l = strcspn(p, "\n");
587 xfwrite(p, l, 1, fp);
594 fprintf(fp, " */\n");
597 static struct conf_printer header_printer_cb =
599 .print_symbol = header_print_symbol,
600 .print_comment = header_print_comment,
606 * This printer is used when generating the `include/config/tristate.conf' file.
609 tristate_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg)
612 if (sym->type == S_TRISTATE && *value != 'n')
613 fprintf(fp, "%s%s=%c\n", CONFIG_, sym->name, (char)toupper(*value));
616 static struct conf_printer tristate_printer_cb =
618 .print_symbol = tristate_print_symbol,
619 .print_comment = kconfig_print_comment,
622 static void conf_write_symbol(FILE *fp, struct symbol *sym,
623 struct conf_printer *printer, void *printer_arg)
632 str = sym_get_string_value(sym);
633 str = sym_escape_string_value(str);
634 printer->print_symbol(fp, sym, str, printer_arg);
638 str = sym_get_string_value(sym);
639 printer->print_symbol(fp, sym, str, printer_arg);
644 conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg)
648 snprintf(buf, sizeof(buf),
650 "Automatically generated file; DO NOT EDIT.\n"
652 rootmenu.prompt->text);
654 printer->print_comment(fp, buf, printer_arg);
658 * Write out a minimal config.
659 * All values that has default values are skipped as this is redundant.
661 int conf_write_defconfig(const char *filename)
667 out = fopen(filename, "w");
671 sym_clear_all_valid();
673 /* Traverse all menus to find all relevant symbols */
674 menu = rootmenu.list;
680 if (!menu_is_visible(menu))
682 } else if (!sym_is_choice(sym)) {
684 if (!(sym->flags & SYMBOL_WRITE))
686 sym->flags &= ~SYMBOL_WRITE;
687 /* If we cannot change the symbol - skip */
688 if (!sym_is_changable(sym))
690 /* If symbol equals to default value - skip */
691 if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0)
695 * If symbol is a choice value and equals to the
696 * default for a choice - skip.
697 * But only if value is bool and equal to "y" and
698 * choice is not "optional".
699 * (If choice is "optional" then all values can be "n")
701 if (sym_is_choice_value(sym)) {
705 cs = prop_get_symbol(sym_get_choice_prop(sym));
706 ds = sym_choice_default(cs);
707 if (!sym_is_optional(cs) && sym == ds) {
708 if ((sym->type == S_BOOLEAN) &&
709 sym_get_tristate_value(sym) == yes)
713 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
716 if (menu->list != NULL) {
719 else if (menu->next != NULL) {
722 while ((menu = menu->parent)) {
723 if (menu->next != NULL) {
734 int conf_write(const char *name)
739 const char *basename;
741 char dirname[PATH_MAX+1], tmpname[PATH_MAX+1], newname[PATH_MAX+1];
745 name = conf_get_configname();
748 if (name && name[0]) {
752 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
753 strcpy(dirname, name);
754 strcat(dirname, "/");
755 basename = conf_get_configname();
756 } else if ((slash = strrchr(name, '/'))) {
757 int size = slash - name + 1;
758 memcpy(dirname, name, size);
761 basename = slash + 1;
763 basename = conf_get_configname();
767 basename = conf_get_configname();
769 sprintf(newname, "%s%s", dirname, basename);
770 env = getenv("KCONFIG_OVERWRITECONFIG");
772 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
773 out = fopen(tmpname, "w");
776 out = fopen(newname, "w");
781 conf_write_heading(out, &kconfig_printer_cb, NULL);
783 if (!conf_get_changed())
784 sym_clear_all_valid();
786 menu = rootmenu.list;
790 if (!menu_is_visible(menu))
792 str = menu_get_prompt(menu);
797 } else if (!(sym->flags & SYMBOL_CHOICE)) {
799 if (!(sym->flags & SYMBOL_WRITE))
801 sym->flags &= ~SYMBOL_WRITE;
803 conf_write_symbol(out, sym, &kconfig_printer_cb, NULL);
813 else while ((menu = menu->parent)) {
823 strcat(dirname, basename);
824 strcat(dirname, ".old");
825 rename(newname, dirname);
826 if (rename(tmpname, newname))
830 conf_message(_("configuration written to %s"), newname);
832 sym_set_change_count(0);
837 static int conf_split_config(void)
840 char path[PATH_MAX+1];
841 char *opwd, *dir, *_name;
847 name = conf_get_autoconfig_name();
848 conf_read_simple(name, S_DEF_AUTO);
851 _name = strdup(name);
852 if (opwd == NULL || _name == NULL)
854 opwd = getcwd(opwd, 256);
855 dir = dirname(_name);
866 for_all_symbols(i, sym) {
868 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
870 if (sym->flags & SYMBOL_WRITE) {
871 if (sym->flags & SYMBOL_DEF_AUTO) {
873 * symbol has old and new value,
879 if (sym_get_tristate_value(sym) ==
880 sym->def[S_DEF_AUTO].tri)
886 if (!strcmp(sym_get_string_value(sym),
887 sym->def[S_DEF_AUTO].val))
895 * If there is no old value, only 'no' (unset)
896 * is allowed as new value.
901 if (sym_get_tristate_value(sym) == no)
908 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
909 /* There is neither an old nor a new value. */
912 * There is an old value, but no new value ('no' (unset)
913 * isn't saved in auto.conf, so the old value is always
914 * different from 'no').
917 /* Replace all '_' and append ".h" */
922 *d++ = (c == '_') ? '/' : c;
926 /* Assume directory path already exists. */
927 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
929 if (errno != ENOENT) {
934 * Create directory components,
935 * unless they exist already.
938 while ((d = strchr(d, '/'))) {
940 if (stat(path, &sb) && mkdir(path, 0755)) {
947 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
964 int conf_write_autoconf(void)
968 FILE *out, *tristate, *out_h;
970 char dir[PATH_MAX+1], buf[PATH_MAX+1];
973 strcpy(dir, conf_get_configname());
974 s = strrchr(dir, '/');
980 sym_clear_all_valid();
982 sprintf(buf, "%s.config.cmd", dir);
985 if (conf_split_config())
988 sprintf(buf, "%s.tmpconfig", dir);
989 out = fopen(buf, "w");
993 sprintf(buf, "%s.tmpconfig_tristate", dir);
994 tristate = fopen(buf, "w");
1000 sprintf(buf, "%s.tmpconfig.h", dir);
1001 out_h = fopen(buf, "w");
1008 conf_write_heading(out, &kconfig_printer_cb, NULL);
1010 conf_write_heading(tristate, &tristate_printer_cb, NULL);
1012 conf_write_heading(out_h, &header_printer_cb, NULL);
1014 for_all_symbols(i, sym) {
1015 sym_calc_value(sym);
1016 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
1019 /* write symbol to auto.conf, tristate and header files */
1020 conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1);
1022 conf_write_symbol(tristate, sym, &tristate_printer_cb, (void *)1);
1024 conf_write_symbol(out_h, sym, &header_printer_cb, NULL);
1030 name = getenv("KCONFIG_AUTOHEADER");
1032 name = "include/generated/autoconf.h";
1033 sprintf(buf, "%s.tmpconfig.h", dir);
1034 if (rename(buf, name))
1036 name = getenv("KCONFIG_TRISTATE");
1038 name = "include/config/tristate.conf";
1039 sprintf(buf, "%s.tmpconfig_tristate", dir);
1040 if (rename(buf, name))
1042 name = conf_get_autoconfig_name();
1044 * This must be the last step, kbuild has a dependency on auto.conf
1045 * and this marks the successful completion of the previous steps.
1047 sprintf(buf, "%s.tmpconfig", dir);
1048 if (rename(buf, name))
1054 static int sym_change_count;
1055 static void (*conf_changed_callback)(void);
1057 void sym_set_change_count(int count)
1059 int _sym_change_count = sym_change_count;
1060 sym_change_count = count;
1061 if (conf_changed_callback &&
1062 (bool)_sym_change_count != (bool)count)
1063 conf_changed_callback();
1066 void sym_add_change_count(int count)
1068 sym_set_change_count(count + sym_change_count);
1071 bool conf_get_changed(void)
1073 return sym_change_count;
1076 void conf_set_changed_callback(void (*fn)(void))
1078 conf_changed_callback = fn;
1081 static bool randomize_choice_values(struct symbol *csym)
1083 struct property *prop;
1089 * If choice is mod then we may have more items selected
1090 * and if no then no-one.
1091 * In both cases stop.
1093 if (csym->curr.tri != yes)
1096 prop = sym_get_choice_prop(csym);
1098 /* count entries in choice block */
1100 expr_list_for_each_sym(prop->expr, e, sym)
1104 * find a random value and set it to yes,
1105 * set the rest to no so we have only one set
1107 def = (rand() % cnt);
1110 expr_list_for_each_sym(prop->expr, e, sym) {
1112 sym->def[S_DEF_USER].tri = yes;
1113 csym->def[S_DEF_USER].val = sym;
1116 sym->def[S_DEF_USER].tri = no;
1118 sym->flags |= SYMBOL_DEF_USER;
1119 /* clear VALID to get value calculated */
1120 sym->flags &= ~SYMBOL_VALID;
1122 csym->flags |= SYMBOL_DEF_USER;
1123 /* clear VALID to get value calculated */
1124 csym->flags &= ~(SYMBOL_VALID);
1129 void set_all_choice_values(struct symbol *csym)
1131 struct property *prop;
1135 prop = sym_get_choice_prop(csym);
1138 * Set all non-assinged choice values to no
1140 expr_list_for_each_sym(prop->expr, e, sym) {
1141 if (!sym_has_value(sym))
1142 sym->def[S_DEF_USER].tri = no;
1144 csym->flags |= SYMBOL_DEF_USER;
1145 /* clear VALID to get value calculated */
1146 csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES);
1149 bool conf_set_all_new_symbols(enum conf_def_mode mode)
1151 struct symbol *sym, *csym;
1152 int i, cnt, pby, pty, ptm; /* pby: probability of boolean = y
1153 * pty: probability of tristate = y
1154 * ptm: probability of tristate = m
1157 pby = 50; pty = ptm = 33; /* can't go as the default in switch-case
1158 * below, otherwise gcc whines about
1159 * -Wmaybe-uninitialized */
1160 if (mode == def_random) {
1162 char *env = getenv("KCONFIG_PROBABILITY");
1164 while( env && *env ) {
1166 int tmp = strtol( env, &endp, 10 );
1167 if( tmp >= 0 && tmp <= 100 ) {
1171 perror( "KCONFIG_PROBABILITY" );
1174 env = (*endp == ':') ? endp+1 : endp;
1181 pby = p[0]; ptm = pby/2; pty = pby-ptm;
1184 pty = p[0]; ptm = p[1]; pby = pty + ptm;
1187 pby = p[0]; pty = p[1]; ptm = p[2];
1191 if( pty+ptm > 100 ) {
1193 perror( "KCONFIG_PROBABILITY" );
1197 bool has_changed = false;
1199 for_all_symbols(i, sym) {
1200 if (sym_has_value(sym) || (sym->flags & SYMBOL_VALID))
1202 switch (sym_get_type(sym)) {
1208 sym->def[S_DEF_USER].tri = yes;
1211 sym->def[S_DEF_USER].tri = mod;
1214 sym->def[S_DEF_USER].tri = no;
1217 sym->def[S_DEF_USER].tri = no;
1219 if (sym->type == S_TRISTATE) {
1221 sym->def[S_DEF_USER].tri = yes;
1222 else if (cnt < (pty+ptm))
1223 sym->def[S_DEF_USER].tri = mod;
1224 } else if (cnt < pby)
1225 sym->def[S_DEF_USER].tri = yes;
1230 if (!(sym_is_choice(sym) && mode == def_random))
1231 sym->flags |= SYMBOL_DEF_USER;
1239 sym_clear_all_valid();
1242 * We have different type of choice blocks.
1243 * If curr.tri equals to mod then we can select several
1244 * choice symbols in one block.
1245 * In this case we do nothing.
1246 * If curr.tri equals yes then only one symbol can be
1247 * selected in a choice block and we set it to yes,
1248 * and the rest to no.
1250 if (mode != def_random) {
1251 for_all_symbols(i, csym) {
1252 if ((sym_is_choice(csym) && !sym_has_value(csym)) ||
1253 sym_is_choice_value(csym))
1254 csym->flags |= SYMBOL_NEED_SET_CHOICE_VALUES;
1258 for_all_symbols(i, csym) {
1259 if (sym_has_value(csym) || !sym_is_choice(csym))
1262 sym_calc_value(csym);
1263 if (mode == def_random)
1264 has_changed = randomize_choice_values(csym);
1266 set_all_choice_values(csym);