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, int def)
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 def_flags = SYMBOL_DEF << def;
129 for_all_symbols(i, sym) {
130 sym->flags |= SYMBOL_CHANGED;
131 sym->flags &= ~(def_flags|SYMBOL_VALID);
132 if (sym_is_choice(sym))
133 sym->flags |= def_flags;
138 if (sym->def[def].val)
139 free(sym->def[def].val);
141 sym->def[def].val = NULL;
142 sym->def[def].tri = no;
146 while (fgets(line, sizeof(line), in)) {
151 if (memcmp(line + 2, "CONFIG_", 7))
153 p = strchr(line + 9, ' ');
157 if (strncmp(p, "is not set", 10))
159 if (def == S_DEF_USER) {
160 sym = sym_find(line + 9);
162 conf_warning("trying to assign nonexistent symbol %s", line + 9);
166 sym = sym_lookup(line + 9, 0);
167 if (sym->type == S_UNKNOWN)
168 sym->type = S_BOOLEAN;
170 if (sym->flags & def_flags) {
171 conf_warning("trying to reassign symbol %s", sym->name);
177 sym->def[def].tri = no;
178 sym->flags |= def_flags;
185 if (memcmp(line, "CONFIG_", 7)) {
186 conf_warning("unexpected data");
189 p = strchr(line + 7, '=');
193 p2 = strchr(p, '\n');
196 if (def == S_DEF_USER) {
197 sym = sym_find(line + 7);
199 conf_warning("trying to assign nonexistent symbol %s", line + 7);
203 sym = sym_lookup(line + 7, 0);
204 if (sym->type == S_UNKNOWN)
207 if (sym->flags & def_flags) {
208 conf_warning("trying to reassign symbol %s", sym->name);
214 sym->def[def].tri = mod;
215 sym->flags |= def_flags;
220 sym->def[def].tri = yes;
221 sym->flags |= def_flags;
225 sym->def[def].tri = no;
226 sym->flags |= def_flags;
229 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
233 for (p2 = p; *p2 && !isspace(*p2); p2++)
235 sym->type = S_STRING;
241 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
246 memmove(p2, p2 + 1, strlen(p2));
249 conf_warning("invalid string found");
255 if (sym_string_valid(sym, p)) {
256 sym->def[def].val = strdup(p);
257 sym->flags |= def_flags;
259 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
270 conf_warning("unexpected data");
273 if (sym && sym_is_choice_value(sym)) {
274 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
275 switch (sym->def[def].tri) {
279 if (cs->def[def].tri == yes) {
280 conf_warning("%s creates inconsistent choice state", sym->name);
281 cs->flags &= ~def_flags;
285 if (cs->def[def].tri != no) {
286 conf_warning("%s creates inconsistent choice state", sym->name);
287 cs->flags &= ~def_flags;
289 cs->def[def].val = sym;
292 cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
298 sym_calc_value(modules_sym);
302 int conf_read(const char *name)
305 struct property *prop;
309 sym_change_count = 0;
311 if (conf_read_simple(name, S_DEF_USER))
314 for_all_symbols(i, sym) {
316 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
318 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
319 /* check that calculated value agrees with saved value */
323 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
325 if (!sym_is_choice(sym))
328 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
332 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
333 /* no previous value and not saved */
336 /* maybe print value in verbose mode... */
338 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
339 if (sym->visible == no)
340 sym->flags &= ~SYMBOL_DEF_USER;
345 if (!sym_string_within_range(sym, sym->def[S_DEF_USER].val))
346 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
351 if (!sym_is_choice(sym))
353 prop = sym_get_choice_prop(sym);
355 for (e = prop->expr; e; e = e->left.expr)
356 if (e->right.sym->visible != no)
357 flags &= e->right.sym->flags;
358 sym->flags |= flags & SYMBOL_DEF_USER;
361 sym_change_count += conf_warnings || conf_unsaved;
366 int conf_write(const char *name)
371 const char *basename;
372 char dirname[128], tmpname[128], newname[128];
376 int use_timestamp = 1;
380 if (name && name[0]) {
384 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
385 strcpy(dirname, name);
386 strcat(dirname, "/");
387 basename = conf_def_filename;
388 } else if ((slash = strrchr(name, '/'))) {
389 int size = slash - name + 1;
390 memcpy(dirname, name, size);
393 basename = slash + 1;
395 basename = conf_def_filename;
399 basename = conf_def_filename;
401 sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
402 out = fopen(newname, "w");
405 sym = sym_lookup("KERNELVERSION", 0);
408 env = getenv("KCONFIG_NOTIMESTAMP");
413 "# Automatically generated make config: don't edit\n"
414 "# Linux kernel version: %s\n"
417 sym_get_string_value(sym),
418 use_timestamp ? "# " : "",
419 use_timestamp ? ctime(&now) : "");
421 if (!sym_change_count)
422 sym_clear_all_valid();
424 menu = rootmenu.list;
428 if (!menu_is_visible(menu))
430 str = menu_get_prompt(menu);
435 } else if (!(sym->flags & SYMBOL_CHOICE)) {
437 if (!(sym->flags & SYMBOL_WRITE))
439 sym->flags &= ~SYMBOL_WRITE;
441 if (type == S_TRISTATE) {
442 sym_calc_value(modules_sym);
443 if (modules_sym->curr.tri == no)
449 switch (sym_get_tristate_value(sym)) {
451 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
454 fprintf(out, "CONFIG_%s=m\n", sym->name);
457 fprintf(out, "CONFIG_%s=y\n", sym->name);
462 str = sym_get_string_value(sym);
463 fprintf(out, "CONFIG_%s=\"", sym->name);
465 l = strcspn(str, "\"\\");
467 fwrite(str, l, 1, out);
472 fprintf(out, "\\%c", *str++);
477 str = sym_get_string_value(sym);
478 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
479 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
483 str = sym_get_string_value(sym);
484 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
496 else while ((menu = menu->parent)) {
504 if (!name || basename != conf_def_filename) {
506 name = conf_def_filename;
507 sprintf(tmpname, "%s.old", name);
508 rename(name, tmpname);
510 sprintf(tmpname, "%s%s", dirname, basename);
511 if (rename(newname, tmpname))
515 "# configuration written to %s\n"
518 sym_change_count = 0;
523 int conf_write_autoconf(void)
532 file_write_dep("include/config/auto.conf.cmd");
534 out = fopen(".tmpconfig", "w");
538 out_h = fopen(".tmpconfig.h", "w");
544 sym = sym_lookup("KERNELVERSION", 0);
548 "# Automatically generated make config: don't edit\n"
549 "# Linux kernel version: %s\n"
552 sym_get_string_value(sym), ctime(&now));
553 fprintf(out_h, "/*\n"
554 " * Automatically generated C config: don't edit\n"
555 " * Linux kernel version: %s\n"
558 "#define AUTOCONF_INCLUDED\n",
559 sym_get_string_value(sym), ctime(&now));
561 sym_clear_all_valid();
563 for_all_symbols(i, sym) {
565 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
570 switch (sym_get_tristate_value(sym)) {
574 fprintf(out, "CONFIG_%s=m\n", sym->name);
575 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
578 fprintf(out, "CONFIG_%s=y\n", sym->name);
579 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
584 str = sym_get_string_value(sym);
585 fprintf(out, "CONFIG_%s=\"", sym->name);
586 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
588 l = strcspn(str, "\"\\");
590 fwrite(str, l, 1, out);
591 fwrite(str, l, 1, out_h);
596 fprintf(out, "\\%c", *str);
597 fprintf(out_h, "\\%c", *str);
601 fputs("\"\n", out_h);
604 str = sym_get_string_value(sym);
605 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
606 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
607 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
611 str = sym_get_string_value(sym);
612 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
613 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
622 name = getenv("KCONFIG_AUTOHEADER");
624 name = "include/linux/autoconf.h";
625 if (rename(".tmpconfig.h", name))
627 name = getenv("KCONFIG_AUTOCONFIG");
629 name = "include/config/auto.conf";
631 * This must be the last step, kbuild has a dependency on auto.conf
632 * and this marks the successful completion of the previous steps.
634 if (rename(".tmpconfig", name))