2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
15 #define LKC_DIRECT_LINK
18 static void conf_warning(const char *fmt, ...)
19 __attribute__ ((format (printf, 1, 2)));
21 static const char *conf_filename;
22 static int conf_lineno, conf_warnings, conf_unsaved;
24 const char conf_defname[] = "arch/$ARCH/defconfig";
26 static void conf_warning(const char *fmt, ...)
30 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
31 vfprintf(stderr, fmt, ap);
32 fprintf(stderr, "\n");
37 const char *conf_get_configname(void)
39 char *name = getenv("KCONFIG_CONFIG");
41 return name ? name : ".config";
44 static char *conf_expand_value(const char *in)
48 static char res_value[SYMBOL_MAXLENGTH];
49 char *dst, name[SYMBOL_MAXLENGTH];
53 while ((src = strchr(in, '$'))) {
54 strncat(res_value, in, src - in);
57 while (isalnum(*src) || *src == '_')
60 sym = sym_lookup(name, 0);
62 strcat(res_value, sym_get_string_value(sym));
65 strcat(res_value, in);
70 char *conf_get_default_confname(void)
73 static char fullname[PATH_MAX+1];
76 name = conf_expand_value(conf_defname);
77 env = getenv(SRCTREE);
79 sprintf(fullname, "%s/%s", env, name);
80 if (!stat(fullname, &buf))
86 static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
93 sym->def[def].tri = mod;
94 sym->flags |= def_flags;
99 sym->def[def].tri = yes;
100 sym->flags |= def_flags;
104 sym->def[def].tri = no;
105 sym->flags |= def_flags;
108 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
112 for (p2 = p; *p2 && !isspace(*p2); p2++)
114 sym->type = S_STRING;
120 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
125 memmove(p2, p2 + 1, strlen(p2));
128 conf_warning("invalid string found");
134 if (sym_string_valid(sym, p)) {
135 sym->def[def].val = strdup(p);
136 sym->flags |= def_flags;
138 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
148 int conf_read_simple(const char *name, int def)
157 in = zconf_fopen(name);
159 struct property *prop;
161 name = conf_get_configname();
162 in = zconf_fopen(name);
165 sym_add_change_count(1);
166 if (!sym_defconfig_list)
169 for_all_defaults(sym_defconfig_list, prop) {
170 if (expr_calc_value(prop->visible.expr) == no ||
171 prop->expr->type != E_SYMBOL)
173 name = conf_expand_value(prop->expr->left.sym->name);
174 in = zconf_fopen(name);
177 "# using defaults found in %s\n"
187 conf_filename = name;
192 def_flags = SYMBOL_DEF << def;
193 for_all_symbols(i, sym) {
194 sym->flags |= SYMBOL_CHANGED;
195 sym->flags &= ~(def_flags|SYMBOL_VALID);
196 if (sym_is_choice(sym))
197 sym->flags |= def_flags;
202 if (sym->def[def].val)
203 free(sym->def[def].val);
205 sym->def[def].val = NULL;
206 sym->def[def].tri = no;
210 while (fgets(line, sizeof(line), in)) {
215 if (memcmp(line + 2, "CONFIG_", 7))
217 p = strchr(line + 9, ' ');
221 if (strncmp(p, "is not set", 10))
223 if (def == S_DEF_USER) {
224 sym = sym_find(line + 9);
226 conf_warning("trying to assign nonexistent symbol %s", line + 9);
230 sym = sym_lookup(line + 9, 0);
231 if (sym->type == S_UNKNOWN)
232 sym->type = S_BOOLEAN;
234 if (sym->flags & def_flags) {
235 conf_warning("trying to reassign symbol %s", sym->name);
241 sym->def[def].tri = no;
242 sym->flags |= def_flags;
249 if (memcmp(line, "CONFIG_", 7)) {
250 conf_warning("unexpected data");
253 p = strchr(line + 7, '=');
257 p2 = strchr(p, '\n');
263 if (def == S_DEF_USER) {
264 sym = sym_find(line + 7);
266 conf_warning("trying to assign nonexistent symbol %s", line + 7);
270 sym = sym_lookup(line + 7, 0);
271 if (sym->type == S_UNKNOWN)
274 if (sym->flags & def_flags) {
275 conf_warning("trying to reassign symbol %s", sym->name);
278 if (conf_set_sym_val(sym, def, def_flags, p))
285 conf_warning("unexpected data");
288 if (sym && sym_is_choice_value(sym)) {
289 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
290 switch (sym->def[def].tri) {
294 if (cs->def[def].tri == yes) {
295 conf_warning("%s creates inconsistent choice state", sym->name);
296 cs->flags &= ~def_flags;
300 if (cs->def[def].tri != no) {
301 conf_warning("%s creates inconsistent choice state", sym->name);
302 cs->flags &= ~def_flags;
304 cs->def[def].val = sym;
307 cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
313 sym_calc_value(modules_sym);
317 int conf_read(const char *name)
320 struct property *prop;
324 sym_set_change_count(0);
326 if (conf_read_simple(name, S_DEF_USER))
329 for_all_symbols(i, sym) {
331 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
333 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
334 /* check that calculated value agrees with saved value */
338 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
340 if (!sym_is_choice(sym))
343 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
347 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
348 /* no previous value and not saved */
351 /* maybe print value in verbose mode... */
353 if (!sym_is_choice(sym))
355 /* The choice symbol only has a set value (and thus is not new)
356 * if all its visible childs have values.
358 prop = sym_get_choice_prop(sym);
360 for (e = prop->expr; e; e = e->left.expr)
361 if (e->right.sym->visible != no)
362 flags &= e->right.sym->flags;
363 sym->flags &= flags | ~SYMBOL_DEF_USER;
366 for_all_symbols(i, sym) {
367 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
368 /* Reset values of generates values, so they'll appear
369 * as new, if they should become visible, but that
370 * doesn't quite work if the Kconfig and the saved
371 * configuration disagree.
373 if (sym->visible == no && !conf_unsaved)
374 sym->flags &= ~SYMBOL_DEF_USER;
379 /* Reset a string value if it's out of range */
380 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
382 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
391 sym_add_change_count(conf_warnings || conf_unsaved);
396 int conf_write(const char *name)
401 const char *basename;
402 char dirname[128], tmpname[128], newname[128];
406 int use_timestamp = 1;
410 if (name && name[0]) {
414 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
415 strcpy(dirname, name);
416 strcat(dirname, "/");
417 basename = conf_get_configname();
418 } else if ((slash = strrchr(name, '/'))) {
419 int size = slash - name + 1;
420 memcpy(dirname, name, size);
423 basename = slash + 1;
425 basename = conf_get_configname();
429 basename = conf_get_configname();
431 sprintf(newname, "%s%s", dirname, basename);
432 env = getenv("KCONFIG_OVERWRITECONFIG");
434 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
435 out = fopen(tmpname, "w");
438 out = fopen(newname, "w");
443 sym = sym_lookup("KERNELVERSION", 0);
446 env = getenv("KCONFIG_NOTIMESTAMP");
451 "# Automatically generated make config: don't edit\n"
452 "# Linux kernel version: %s\n"
455 sym_get_string_value(sym),
456 use_timestamp ? "# " : "",
457 use_timestamp ? ctime(&now) : "");
459 if (!conf_get_changed())
460 sym_clear_all_valid();
462 menu = rootmenu.list;
466 if (!menu_is_visible(menu))
468 str = menu_get_prompt(menu);
473 } else if (!(sym->flags & SYMBOL_CHOICE)) {
475 if (!(sym->flags & SYMBOL_WRITE))
477 sym->flags &= ~SYMBOL_WRITE;
479 if (type == S_TRISTATE) {
480 sym_calc_value(modules_sym);
481 if (modules_sym->curr.tri == no)
487 switch (sym_get_tristate_value(sym)) {
489 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
492 fprintf(out, "CONFIG_%s=m\n", sym->name);
495 fprintf(out, "CONFIG_%s=y\n", sym->name);
500 str = sym_get_string_value(sym);
501 fprintf(out, "CONFIG_%s=\"", sym->name);
503 l = strcspn(str, "\"\\");
505 fwrite(str, l, 1, out);
510 fprintf(out, "\\%c", *str++);
515 str = sym_get_string_value(sym);
516 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
517 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
521 str = sym_get_string_value(sym);
522 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
534 else while ((menu = menu->parent)) {
544 strcat(dirname, basename);
545 strcat(dirname, ".old");
546 rename(newname, dirname);
547 if (rename(tmpname, newname))
552 "# configuration written to %s\n"
555 sym_set_change_count(0);
560 int conf_split_config(void)
562 char *name, path[128];
568 name = getenv("KCONFIG_AUTOCONFIG");
570 name = "include/config/auto.conf";
571 conf_read_simple(name, S_DEF_AUTO);
573 if (chdir("include/config"))
577 for_all_symbols(i, sym) {
579 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
581 if (sym->flags & SYMBOL_WRITE) {
582 if (sym->flags & SYMBOL_DEF_AUTO) {
584 * symbol has old and new value,
590 if (sym_get_tristate_value(sym) ==
591 sym->def[S_DEF_AUTO].tri)
597 if (!strcmp(sym_get_string_value(sym),
598 sym->def[S_DEF_AUTO].val))
606 * If there is no old value, only 'no' (unset)
607 * is allowed as new value.
612 if (sym_get_tristate_value(sym) == no)
619 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
620 /* There is neither an old nor a new value. */
623 * There is an old value, but no new value ('no' (unset)
624 * isn't saved in auto.conf, so the old value is always
625 * different from 'no').
628 /* Replace all '_' and append ".h" */
633 *d++ = (c == '_') ? '/' : c;
637 /* Assume directory path already exists. */
638 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
640 if (errno != ENOENT) {
645 * Create directory components,
646 * unless they exist already.
649 while ((d = strchr(d, '/'))) {
651 if (stat(path, &sb) && mkdir(path, 0755)) {
658 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
673 int conf_write_autoconf(void)
682 sym_clear_all_valid();
684 file_write_dep("include/config/auto.conf.cmd");
686 if (conf_split_config())
689 out = fopen(".tmpconfig", "w");
693 out_h = fopen(".tmpconfig.h", "w");
699 sym = sym_lookup("KERNELVERSION", 0);
703 "# Automatically generated make config: don't edit\n"
704 "# Linux kernel version: %s\n"
707 sym_get_string_value(sym), ctime(&now));
708 fprintf(out_h, "/*\n"
709 " * Automatically generated C config: don't edit\n"
710 " * Linux kernel version: %s\n"
713 "#define AUTOCONF_INCLUDED\n",
714 sym_get_string_value(sym), ctime(&now));
716 for_all_symbols(i, sym) {
718 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
723 switch (sym_get_tristate_value(sym)) {
727 fprintf(out, "CONFIG_%s=m\n", sym->name);
728 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
731 fprintf(out, "CONFIG_%s=y\n", sym->name);
732 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
737 str = sym_get_string_value(sym);
738 fprintf(out, "CONFIG_%s=\"", sym->name);
739 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
741 l = strcspn(str, "\"\\");
743 fwrite(str, l, 1, out);
744 fwrite(str, l, 1, out_h);
749 fprintf(out, "\\%c", *str);
750 fprintf(out_h, "\\%c", *str);
754 fputs("\"\n", out_h);
757 str = sym_get_string_value(sym);
758 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
759 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
760 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
764 str = sym_get_string_value(sym);
765 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
766 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
775 name = getenv("KCONFIG_AUTOHEADER");
777 name = "include/linux/autoconf.h";
778 if (rename(".tmpconfig.h", name))
780 name = getenv("KCONFIG_AUTOCONFIG");
782 name = "include/config/auto.conf";
784 * This must be the last step, kbuild has a dependency on auto.conf
785 * and this marks the successful completion of the previous steps.
787 if (rename(".tmpconfig", name))
793 static int sym_change_count;
794 static void (*conf_changed_callback)(void);
796 void sym_set_change_count(int count)
798 int _sym_change_count = sym_change_count;
799 sym_change_count = count;
800 if (conf_changed_callback &&
801 (bool)_sym_change_count != (bool)count)
802 conf_changed_callback();
805 void sym_add_change_count(int count)
807 sym_set_change_count(count + sym_change_count);
810 bool conf_get_changed(void)
812 return sym_change_count;
815 void conf_set_changed_callback(void (*fn)(void))
817 conf_changed_callback = fn;