2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
14 #define LKC_DIRECT_LINK
17 static void conf_warning(const char *fmt, ...)
18 __attribute__ ((format (printf, 1, 2)));
20 static const char *conf_filename;
21 static int conf_lineno, conf_warnings, conf_unsaved;
23 const char conf_def_filename[] = ".config";
25 const char conf_defname[] = "arch/$ARCH/defconfig";
27 const char *conf_confnames[] = {
29 "/lib/modules/$UNAME_RELEASE/.config",
31 "/boot/config-$UNAME_RELEASE",
36 static void conf_warning(const char *fmt, ...)
40 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
41 vfprintf(stderr, fmt, ap);
42 fprintf(stderr, "\n");
47 static char *conf_expand_value(const char *in)
51 static char res_value[SYMBOL_MAXLENGTH];
52 char *dst, name[SYMBOL_MAXLENGTH];
56 while ((src = strchr(in, '$'))) {
57 strncat(res_value, in, src - in);
60 while (isalnum(*src) || *src == '_')
63 sym = sym_lookup(name, 0);
65 strcat(res_value, sym_get_string_value(sym));
68 strcat(res_value, in);
73 char *conf_get_default_confname(void)
76 static char fullname[PATH_MAX+1];
79 name = conf_expand_value(conf_defname);
80 env = getenv(SRCTREE);
82 sprintf(fullname, "%s/%s", env, name);
83 if (!stat(fullname, &buf))
89 int conf_read_simple(const char *name)
98 in = zconf_fopen(name);
100 const char **names = conf_confnames;
104 in = zconf_fopen(name);
108 while ((name = *names++)) {
109 name = conf_expand_value(name);
110 in = zconf_fopen(name);
113 "# using defaults found in %s\n"
123 conf_filename = name;
128 for_all_symbols(i, sym) {
129 sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
130 if (sym_is_choice(sym))
131 sym->flags &= ~SYMBOL_NEW;
132 sym->flags &= ~SYMBOL_VALID;
140 sym->user.val = NULL;
145 while (fgets(line, sizeof(line), in)) {
150 if (memcmp(line + 2, "CONFIG_", 7))
152 p = strchr(line + 9, ' ');
156 if (strncmp(p, "is not set", 10))
158 sym = sym_find(line + 9);
160 conf_warning("trying to assign nonexistent symbol %s", line + 9);
162 } else if (!(sym->flags & SYMBOL_NEW)) {
163 conf_warning("trying to reassign symbol %s", sym->name);
170 sym->flags &= ~SYMBOL_NEW;
177 if (memcmp(line, "CONFIG_", 7)) {
178 conf_warning("unexpected data");
181 p = strchr(line + 7, '=');
185 p2 = strchr(p, '\n');
188 sym = sym_find(line + 7);
190 conf_warning("trying to assign nonexistent symbol %s", line + 7);
192 } else if (!(sym->flags & SYMBOL_NEW)) {
193 conf_warning("trying to reassign symbol %s", sym->name);
200 sym->flags &= ~SYMBOL_NEW;
206 sym->flags &= ~SYMBOL_NEW;
211 sym->flags &= ~SYMBOL_NEW;
214 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
219 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
224 memmove(p2, p2 + 1, strlen(p2));
227 conf_warning("invalid string found");
232 if (sym_string_valid(sym, p)) {
233 sym->user.val = strdup(p);
234 sym->flags &= ~SYMBOL_NEW;
236 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
247 conf_warning("unexpected data");
250 if (sym && sym_is_choice_value(sym)) {
251 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
252 switch (sym->user.tri) {
256 if (cs->user.tri == yes) {
257 conf_warning("%s creates inconsistent choice state", sym->name);
258 cs->flags |= SYMBOL_NEW;
262 if (cs->user.tri != no) {
263 conf_warning("%s creates inconsistent choice state", sym->name);
264 cs->flags |= SYMBOL_NEW;
269 cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
275 sym_calc_value(modules_sym);
279 int conf_read(const char *name)
282 struct property *prop;
286 sym_change_count = 0;
288 if (conf_read_simple(name))
291 for_all_symbols(i, sym) {
293 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
295 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
296 /* check that calculated value agrees with saved value */
300 if (sym->user.tri != sym_get_tristate_value(sym))
302 if (!sym_is_choice(sym))
305 if (!strcmp(sym->curr.val, sym->user.val))
309 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
310 /* no previous value and not saved */
313 /* maybe print value in verbose mode... */
315 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
316 if (sym->visible == no)
317 sym->flags |= SYMBOL_NEW;
322 if (!sym_string_within_range(sym, sym->user.val)) {
323 sym->flags |= SYMBOL_NEW;
324 sym->flags &= ~SYMBOL_VALID;
330 if (!sym_is_choice(sym))
332 prop = sym_get_choice_prop(sym);
333 for (e = prop->expr; e; e = e->left.expr)
334 if (e->right.sym->visible != no)
335 sym->flags |= e->right.sym->flags & SYMBOL_NEW;
338 sym_change_count += conf_warnings || conf_unsaved;
343 int conf_write(const char *name)
348 const char *basename;
349 char dirname[128], tmpname[128], newname[128];
353 int use_timestamp = 1;
357 if (name && name[0]) {
361 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
362 strcpy(dirname, name);
363 strcat(dirname, "/");
364 basename = conf_def_filename;
365 } else if ((slash = strrchr(name, '/'))) {
366 int size = slash - name + 1;
367 memcpy(dirname, name, size);
370 basename = slash + 1;
372 basename = conf_def_filename;
376 basename = conf_def_filename;
378 sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
379 out = fopen(newname, "w");
382 sym = sym_lookup("KERNELVERSION", 0);
385 env = getenv("KCONFIG_NOTIMESTAMP");
390 "# Automatically generated make config: don't edit\n"
391 "# Linux kernel version: %s\n"
394 sym_get_string_value(sym),
395 use_timestamp ? "# " : "",
396 use_timestamp ? ctime(&now) : "");
398 if (!sym_change_count)
399 sym_clear_all_valid();
401 menu = rootmenu.list;
405 if (!menu_is_visible(menu))
407 str = menu_get_prompt(menu);
412 } else if (!(sym->flags & SYMBOL_CHOICE)) {
414 if (!(sym->flags & SYMBOL_WRITE))
416 sym->flags &= ~SYMBOL_WRITE;
418 if (type == S_TRISTATE) {
419 sym_calc_value(modules_sym);
420 if (modules_sym->curr.tri == no)
426 switch (sym_get_tristate_value(sym)) {
428 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
431 fprintf(out, "CONFIG_%s=m\n", sym->name);
434 fprintf(out, "CONFIG_%s=y\n", sym->name);
439 str = sym_get_string_value(sym);
440 fprintf(out, "CONFIG_%s=\"", sym->name);
442 l = strcspn(str, "\"\\");
444 fwrite(str, l, 1, out);
449 fprintf(out, "\\%c", *str++);
454 str = sym_get_string_value(sym);
455 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
456 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
460 str = sym_get_string_value(sym);
461 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
473 else while ((menu = menu->parent)) {
481 if (!name || basename != conf_def_filename) {
483 name = conf_def_filename;
484 sprintf(tmpname, "%s.old", name);
485 rename(name, tmpname);
487 sprintf(tmpname, "%s%s", dirname, basename);
488 if (rename(newname, tmpname))
492 "# configuration written to %s\n"
495 sym_change_count = 0;
500 int conf_write_autoconf(void)
509 file_write_dep("include/config/auto.conf.cmd");
511 out = fopen(".tmpconfig", "w");
515 out_h = fopen(".tmpconfig.h", "w");
521 sym = sym_lookup("KERNELVERSION", 0);
525 "# Automatically generated make config: don't edit\n"
526 "# Linux kernel version: %s\n"
529 sym_get_string_value(sym), ctime(&now));
530 fprintf(out_h, "/*\n"
531 " * Automatically generated C config: don't edit\n"
532 " * Linux kernel version: %s\n"
535 "#define AUTOCONF_INCLUDED\n",
536 sym_get_string_value(sym), ctime(&now));
538 sym_clear_all_valid();
540 for_all_symbols(i, sym) {
542 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
547 switch (sym_get_tristate_value(sym)) {
551 fprintf(out, "CONFIG_%s=m\n", sym->name);
552 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
555 fprintf(out, "CONFIG_%s=y\n", sym->name);
556 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
561 str = sym_get_string_value(sym);
562 fprintf(out, "CONFIG_%s=\"", sym->name);
563 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
565 l = strcspn(str, "\"\\");
567 fwrite(str, l, 1, out);
568 fwrite(str, l, 1, out_h);
573 fprintf(out, "\\%c", *str);
574 fprintf(out_h, "\\%c", *str);
578 fputs("\"\n", out_h);
581 str = sym_get_string_value(sym);
582 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
583 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
584 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
588 str = sym_get_string_value(sym);
589 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
590 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
599 name = getenv("KCONFIG_AUTOHEADER");
601 name = "include/linux/autoconf.h";
602 if (rename(".tmpconfig.h", name))
604 name = getenv("KCONFIG_AUTOCONFIG");
606 name = "include/config/auto.conf";
608 * This must be the last step, kbuild has a dependency on auto.conf
609 * and this marks the successful completion of the previous steps.
611 if (rename(".tmpconfig", name))