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 /* Read an environment variable and assign the value to the symbol */
149 int conf_set_env_sym(const char *env, const char *symname, int def)
158 sprintf(warning, "Environment variable (%s = \"%s\")", env, p);
159 conf_filename = warning;
160 def_flags = SYMBOL_DEF << def;
161 if (def == S_DEF_USER) {
162 sym = sym_find(symname);
166 sym = sym_lookup(symname, 0);
167 if (sym->type == S_UNKNOWN)
170 conf_set_sym_val(sym, def, def_flags, p);
175 int conf_read_simple(const char *name, int def)
184 in = zconf_fopen(name);
186 struct property *prop;
188 name = conf_get_configname();
189 in = zconf_fopen(name);
192 sym_add_change_count(1);
193 if (!sym_defconfig_list)
196 for_all_defaults(sym_defconfig_list, prop) {
197 if (expr_calc_value(prop->visible.expr) == no ||
198 prop->expr->type != E_SYMBOL)
200 name = conf_expand_value(prop->expr->left.sym->name);
201 in = zconf_fopen(name);
204 "# using defaults found in %s\n"
214 conf_filename = name;
219 def_flags = SYMBOL_DEF << def;
220 for_all_symbols(i, sym) {
221 sym->flags |= SYMBOL_CHANGED;
222 sym->flags &= ~(def_flags|SYMBOL_VALID);
223 if (sym_is_choice(sym))
224 sym->flags |= def_flags;
229 if (sym->def[def].val)
230 free(sym->def[def].val);
232 sym->def[def].val = NULL;
233 sym->def[def].tri = no;
237 while (fgets(line, sizeof(line), in)) {
242 if (memcmp(line + 2, "CONFIG_", 7))
244 p = strchr(line + 9, ' ');
248 if (strncmp(p, "is not set", 10))
250 if (def == S_DEF_USER) {
251 sym = sym_find(line + 9);
253 conf_warning("trying to assign nonexistent symbol %s", line + 9);
257 sym = sym_lookup(line + 9, 0);
258 if (sym->type == S_UNKNOWN)
259 sym->type = S_BOOLEAN;
261 if (sym->flags & def_flags) {
262 conf_warning("trying to reassign symbol %s", sym->name);
268 sym->def[def].tri = no;
269 sym->flags |= def_flags;
276 if (memcmp(line, "CONFIG_", 7)) {
277 conf_warning("unexpected data");
280 p = strchr(line + 7, '=');
284 p2 = strchr(p, '\n');
290 if (def == S_DEF_USER) {
291 sym = sym_find(line + 7);
293 conf_warning("trying to assign nonexistent symbol %s", line + 7);
297 sym = sym_lookup(line + 7, 0);
298 if (sym->type == S_UNKNOWN)
301 if (sym->flags & def_flags) {
302 conf_warning("trying to reassign symbol %s", sym->name);
305 if (conf_set_sym_val(sym, def, def_flags, p))
312 conf_warning("unexpected data");
315 if (sym && sym_is_choice_value(sym)) {
316 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
317 switch (sym->def[def].tri) {
321 if (cs->def[def].tri == yes) {
322 conf_warning("%s creates inconsistent choice state", sym->name);
323 cs->flags &= ~def_flags;
327 if (cs->def[def].tri != no) {
328 conf_warning("%s creates inconsistent choice state", sym->name);
329 cs->flags &= ~def_flags;
331 cs->def[def].val = sym;
334 cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
340 sym_calc_value(modules_sym);
344 int conf_read(const char *name)
347 struct property *prop;
351 sym_set_change_count(0);
353 if (conf_read_simple(name, S_DEF_USER))
356 for_all_symbols(i, sym) {
358 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
360 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
361 /* check that calculated value agrees with saved value */
365 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
367 if (!sym_is_choice(sym))
370 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
374 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
375 /* no previous value and not saved */
378 /* maybe print value in verbose mode... */
380 if (!sym_is_choice(sym))
382 /* The choice symbol only has a set value (and thus is not new)
383 * if all its visible childs have values.
385 prop = sym_get_choice_prop(sym);
387 for (e = prop->expr; e; e = e->left.expr)
388 if (e->right.sym->visible != no)
389 flags &= e->right.sym->flags;
390 sym->flags &= flags | ~SYMBOL_DEF_USER;
393 for_all_symbols(i, sym) {
394 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
395 /* Reset values of generates values, so they'll appear
396 * as new, if they should become visible, but that
397 * doesn't quite work if the Kconfig and the saved
398 * configuration disagree.
400 if (sym->visible == no && !conf_unsaved)
401 sym->flags &= ~SYMBOL_DEF_USER;
406 /* Reset a string value if it's out of range */
407 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
409 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
418 sym_add_change_count(conf_warnings || conf_unsaved);
423 int conf_write(const char *name)
428 const char *basename;
429 char dirname[128], tmpname[128], newname[128];
433 int use_timestamp = 1;
437 if (name && name[0]) {
441 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
442 strcpy(dirname, name);
443 strcat(dirname, "/");
444 basename = conf_get_configname();
445 } else if ((slash = strrchr(name, '/'))) {
446 int size = slash - name + 1;
447 memcpy(dirname, name, size);
450 basename = slash + 1;
452 basename = conf_get_configname();
456 basename = conf_get_configname();
458 sprintf(newname, "%s%s", dirname, basename);
459 env = getenv("KCONFIG_OVERWRITECONFIG");
461 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
462 out = fopen(tmpname, "w");
465 out = fopen(newname, "w");
470 sym = sym_lookup("KERNELVERSION", 0);
473 env = getenv("KCONFIG_NOTIMESTAMP");
478 "# Automatically generated make config: don't edit\n"
479 "# Linux kernel version: %s\n"
482 sym_get_string_value(sym),
483 use_timestamp ? "# " : "",
484 use_timestamp ? ctime(&now) : "");
486 if (!conf_get_changed())
487 sym_clear_all_valid();
489 menu = rootmenu.list;
493 if (!menu_is_visible(menu))
495 str = menu_get_prompt(menu);
500 } else if (!(sym->flags & SYMBOL_CHOICE)) {
502 if (!(sym->flags & SYMBOL_WRITE))
504 sym->flags &= ~SYMBOL_WRITE;
506 if (type == S_TRISTATE) {
507 sym_calc_value(modules_sym);
508 if (modules_sym->curr.tri == no)
514 switch (sym_get_tristate_value(sym)) {
516 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
519 fprintf(out, "CONFIG_%s=m\n", sym->name);
522 fprintf(out, "CONFIG_%s=y\n", sym->name);
527 str = sym_get_string_value(sym);
528 fprintf(out, "CONFIG_%s=\"", sym->name);
530 l = strcspn(str, "\"\\");
532 fwrite(str, l, 1, out);
537 fprintf(out, "\\%c", *str++);
542 str = sym_get_string_value(sym);
543 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
544 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
548 str = sym_get_string_value(sym);
549 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
561 else while ((menu = menu->parent)) {
571 strcat(dirname, basename);
572 strcat(dirname, ".old");
573 rename(newname, dirname);
574 if (rename(tmpname, newname))
579 "# configuration written to %s\n"
582 sym_set_change_count(0);
587 int conf_split_config(void)
589 char *name, path[128];
595 name = getenv("KCONFIG_AUTOCONFIG");
597 name = "include/config/auto.conf";
598 conf_read_simple(name, S_DEF_AUTO);
600 if (chdir("include/config"))
604 for_all_symbols(i, sym) {
606 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
608 if (sym->flags & SYMBOL_WRITE) {
609 if (sym->flags & SYMBOL_DEF_AUTO) {
611 * symbol has old and new value,
617 if (sym_get_tristate_value(sym) ==
618 sym->def[S_DEF_AUTO].tri)
624 if (!strcmp(sym_get_string_value(sym),
625 sym->def[S_DEF_AUTO].val))
633 * If there is no old value, only 'no' (unset)
634 * is allowed as new value.
639 if (sym_get_tristate_value(sym) == no)
646 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
647 /* There is neither an old nor a new value. */
650 * There is an old value, but no new value ('no' (unset)
651 * isn't saved in auto.conf, so the old value is always
652 * different from 'no').
655 /* Replace all '_' and append ".h" */
660 *d++ = (c == '_') ? '/' : c;
664 /* Assume directory path already exists. */
665 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
667 if (errno != ENOENT) {
672 * Create directory components,
673 * unless they exist already.
676 while ((d = strchr(d, '/'))) {
678 if (stat(path, &sb) && mkdir(path, 0755)) {
685 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
700 int conf_write_autoconf(void)
709 sym_clear_all_valid();
711 file_write_dep("include/config/auto.conf.cmd");
713 if (conf_split_config())
716 out = fopen(".tmpconfig", "w");
720 out_h = fopen(".tmpconfig.h", "w");
726 sym = sym_lookup("KERNELVERSION", 0);
730 "# Automatically generated make config: don't edit\n"
731 "# Linux kernel version: %s\n"
734 sym_get_string_value(sym), ctime(&now));
735 fprintf(out_h, "/*\n"
736 " * Automatically generated C config: don't edit\n"
737 " * Linux kernel version: %s\n"
740 "#define AUTOCONF_INCLUDED\n",
741 sym_get_string_value(sym), ctime(&now));
743 for_all_symbols(i, sym) {
745 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
750 switch (sym_get_tristate_value(sym)) {
754 fprintf(out, "CONFIG_%s=m\n", sym->name);
755 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
758 fprintf(out, "CONFIG_%s=y\n", sym->name);
759 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
764 str = sym_get_string_value(sym);
765 fprintf(out, "CONFIG_%s=\"", sym->name);
766 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
768 l = strcspn(str, "\"\\");
770 fwrite(str, l, 1, out);
771 fwrite(str, l, 1, out_h);
776 fprintf(out, "\\%c", *str);
777 fprintf(out_h, "\\%c", *str);
781 fputs("\"\n", out_h);
784 str = sym_get_string_value(sym);
785 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
786 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
787 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
791 str = sym_get_string_value(sym);
792 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
793 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
802 name = getenv("KCONFIG_AUTOHEADER");
804 name = "include/linux/autoconf.h";
805 if (rename(".tmpconfig.h", name))
807 name = getenv("KCONFIG_AUTOCONFIG");
809 name = "include/config/auto.conf";
811 * This must be the last step, kbuild has a dependency on auto.conf
812 * and this marks the successful completion of the previous steps.
814 if (rename(".tmpconfig", name))
820 static int sym_change_count;
821 static void (*conf_changed_callback)(void);
823 void sym_set_change_count(int count)
825 int _sym_change_count = sym_change_count;
826 sym_change_count = count;
827 if (conf_changed_callback &&
828 (bool)_sym_change_count != (bool)count)
829 conf_changed_callback();
832 void sym_add_change_count(int count)
834 sym_set_change_count(count + sym_change_count);
837 bool conf_get_changed(void)
839 return sym_change_count;
842 void conf_set_changed_callback(void (*fn)(void))
844 conf_changed_callback = fn;