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_def_filename[] = ".config";
26 const char conf_defname[] = "arch/$ARCH/defconfig";
28 static void conf_warning(const char *fmt, ...)
32 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
33 vfprintf(stderr, fmt, ap);
34 fprintf(stderr, "\n");
39 static char *conf_expand_value(const char *in)
43 static char res_value[SYMBOL_MAXLENGTH];
44 char *dst, name[SYMBOL_MAXLENGTH];
48 while ((src = strchr(in, '$'))) {
49 strncat(res_value, in, src - in);
52 while (isalnum(*src) || *src == '_')
55 sym = sym_lookup(name, 0);
57 strcat(res_value, sym_get_string_value(sym));
60 strcat(res_value, in);
65 char *conf_get_default_confname(void)
68 static char fullname[PATH_MAX+1];
71 name = conf_expand_value(conf_defname);
72 env = getenv(SRCTREE);
74 sprintf(fullname, "%s/%s", env, name);
75 if (!stat(fullname, &buf))
81 int conf_read_simple(const char *name, int def)
90 in = zconf_fopen(name);
92 struct property *prop;
94 name = conf_def_filename;
95 in = zconf_fopen(name);
99 if (!sym_defconfig_list)
102 for_all_defaults(sym_defconfig_list, prop) {
103 if (expr_calc_value(prop->visible.expr) == no ||
104 prop->expr->type != E_SYMBOL)
106 name = conf_expand_value(prop->expr->left.sym->name);
107 in = zconf_fopen(name);
110 "# using defaults found in %s\n"
120 conf_filename = name;
125 def_flags = SYMBOL_DEF << def;
126 for_all_symbols(i, sym) {
127 sym->flags |= SYMBOL_CHANGED;
128 sym->flags &= ~(def_flags|SYMBOL_VALID);
129 if (sym_is_choice(sym))
130 sym->flags |= def_flags;
135 if (sym->def[def].val)
136 free(sym->def[def].val);
138 sym->def[def].val = NULL;
139 sym->def[def].tri = no;
143 while (fgets(line, sizeof(line), in)) {
148 if (memcmp(line + 2, "CONFIG_", 7))
150 p = strchr(line + 9, ' ');
154 if (strncmp(p, "is not set", 10))
156 if (def == S_DEF_USER) {
157 sym = sym_find(line + 9);
159 conf_warning("trying to assign nonexistent symbol %s", line + 9);
163 sym = sym_lookup(line + 9, 0);
164 if (sym->type == S_UNKNOWN)
165 sym->type = S_BOOLEAN;
167 if (sym->flags & def_flags) {
168 conf_warning("trying to reassign symbol %s", sym->name);
174 sym->def[def].tri = no;
175 sym->flags |= def_flags;
182 if (memcmp(line, "CONFIG_", 7)) {
183 conf_warning("unexpected data");
186 p = strchr(line + 7, '=');
190 p2 = strchr(p, '\n');
193 if (def == S_DEF_USER) {
194 sym = sym_find(line + 7);
196 conf_warning("trying to assign nonexistent symbol %s", line + 7);
200 sym = sym_lookup(line + 7, 0);
201 if (sym->type == S_UNKNOWN)
204 if (sym->flags & def_flags) {
205 conf_warning("trying to reassign symbol %s", sym->name);
211 sym->def[def].tri = mod;
212 sym->flags |= def_flags;
217 sym->def[def].tri = yes;
218 sym->flags |= def_flags;
222 sym->def[def].tri = no;
223 sym->flags |= def_flags;
226 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
230 for (p2 = p; *p2 && !isspace(*p2); p2++)
232 sym->type = S_STRING;
238 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
243 memmove(p2, p2 + 1, strlen(p2));
246 conf_warning("invalid string found");
252 if (sym_string_valid(sym, p)) {
253 sym->def[def].val = strdup(p);
254 sym->flags |= def_flags;
256 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
267 conf_warning("unexpected data");
270 if (sym && sym_is_choice_value(sym)) {
271 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
272 switch (sym->def[def].tri) {
276 if (cs->def[def].tri == yes) {
277 conf_warning("%s creates inconsistent choice state", sym->name);
278 cs->flags &= ~def_flags;
282 if (cs->def[def].tri != no) {
283 conf_warning("%s creates inconsistent choice state", sym->name);
284 cs->flags &= ~def_flags;
286 cs->def[def].val = sym;
289 cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
295 sym_calc_value(modules_sym);
299 int conf_read(const char *name)
302 struct property *prop;
306 sym_change_count = 0;
308 if (conf_read_simple(name, S_DEF_USER))
311 for_all_symbols(i, sym) {
313 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
315 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
316 /* check that calculated value agrees with saved value */
320 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
322 if (!sym_is_choice(sym))
325 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
329 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
330 /* no previous value and not saved */
333 /* maybe print value in verbose mode... */
335 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
336 if (sym->visible == no)
337 sym->flags &= ~SYMBOL_DEF_USER;
342 if (!sym_string_within_range(sym, sym->def[S_DEF_USER].val))
343 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
348 if (!sym_is_choice(sym))
350 prop = sym_get_choice_prop(sym);
352 for (e = prop->expr; e; e = e->left.expr)
353 if (e->right.sym->visible != no)
354 flags &= e->right.sym->flags;
355 sym->flags |= flags & SYMBOL_DEF_USER;
358 sym_change_count += conf_warnings || conf_unsaved;
363 int conf_write(const char *name)
368 const char *basename;
369 char dirname[128], tmpname[128], newname[128];
373 int use_timestamp = 1;
377 if (name && name[0]) {
381 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
382 strcpy(dirname, name);
383 strcat(dirname, "/");
384 basename = conf_def_filename;
385 } else if ((slash = strrchr(name, '/'))) {
386 int size = slash - name + 1;
387 memcpy(dirname, name, size);
390 basename = slash + 1;
392 basename = conf_def_filename;
396 basename = conf_def_filename;
398 sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
399 out = fopen(newname, "w");
402 sym = sym_lookup("KERNELVERSION", 0);
405 env = getenv("KCONFIG_NOTIMESTAMP");
410 "# Automatically generated make config: don't edit\n"
411 "# Linux kernel version: %s\n"
414 sym_get_string_value(sym),
415 use_timestamp ? "# " : "",
416 use_timestamp ? ctime(&now) : "");
418 if (!sym_change_count)
419 sym_clear_all_valid();
421 menu = rootmenu.list;
425 if (!menu_is_visible(menu))
427 str = menu_get_prompt(menu);
432 } else if (!(sym->flags & SYMBOL_CHOICE)) {
434 if (!(sym->flags & SYMBOL_WRITE))
436 sym->flags &= ~SYMBOL_WRITE;
438 if (type == S_TRISTATE) {
439 sym_calc_value(modules_sym);
440 if (modules_sym->curr.tri == no)
446 switch (sym_get_tristate_value(sym)) {
448 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
451 fprintf(out, "CONFIG_%s=m\n", sym->name);
454 fprintf(out, "CONFIG_%s=y\n", sym->name);
459 str = sym_get_string_value(sym);
460 fprintf(out, "CONFIG_%s=\"", sym->name);
462 l = strcspn(str, "\"\\");
464 fwrite(str, l, 1, out);
469 fprintf(out, "\\%c", *str++);
474 str = sym_get_string_value(sym);
475 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
476 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
480 str = sym_get_string_value(sym);
481 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
493 else while ((menu = menu->parent)) {
501 if (!name || basename != conf_def_filename) {
503 name = conf_def_filename;
504 sprintf(tmpname, "%s.old", name);
505 rename(name, tmpname);
507 sprintf(tmpname, "%s%s", dirname, basename);
508 if (rename(newname, tmpname))
512 "# configuration written to %s\n"
515 sym_change_count = 0;
520 int conf_split_config(void)
522 char *name, path[128];
528 name = getenv("KCONFIG_AUTOCONFIG");
530 name = "include/config/auto.conf";
531 conf_read_simple(name, S_DEF_AUTO);
533 if (chdir("include/config"))
537 for_all_symbols(i, sym) {
539 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
541 if (sym->flags & SYMBOL_WRITE) {
542 if (sym->flags & SYMBOL_DEF_AUTO) {
544 * symbol has old and new value,
550 if (sym_get_tristate_value(sym) ==
551 sym->def[S_DEF_AUTO].tri)
557 if (!strcmp(sym_get_string_value(sym),
558 sym->def[S_DEF_AUTO].val))
566 * If there is no old value, only 'no' (unset)
567 * is allowed as new value.
572 if (sym_get_tristate_value(sym) == no)
579 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
580 /* There is neither an old nor a new value. */
583 * There is an old value, but no new value ('no' (unset)
584 * isn't saved in auto.conf, so the old value is always
585 * different from 'no').
588 /* Replace all '_' and append ".h" */
593 *d++ = (c == '_') ? '/' : c;
597 /* Assume directory path already exists. */
598 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
600 if (errno != ENOENT) {
605 * Create directory components,
606 * unless they exist already.
609 while ((d = strchr(d, '/'))) {
611 if (stat(path, &sb) && mkdir(path, 0755)) {
618 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
633 int conf_write_autoconf(void)
642 sym_clear_all_valid();
644 file_write_dep("include/config/auto.conf.cmd");
646 if (conf_split_config())
649 out = fopen(".tmpconfig", "w");
653 out_h = fopen(".tmpconfig.h", "w");
659 sym = sym_lookup("KERNELVERSION", 0);
663 "# Automatically generated make config: don't edit\n"
664 "# Linux kernel version: %s\n"
667 sym_get_string_value(sym), ctime(&now));
668 fprintf(out_h, "/*\n"
669 " * Automatically generated C config: don't edit\n"
670 " * Linux kernel version: %s\n"
673 "#define AUTOCONF_INCLUDED\n",
674 sym_get_string_value(sym), ctime(&now));
676 for_all_symbols(i, sym) {
678 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
683 switch (sym_get_tristate_value(sym)) {
687 fprintf(out, "CONFIG_%s=m\n", sym->name);
688 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
691 fprintf(out, "CONFIG_%s=y\n", sym->name);
692 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
697 str = sym_get_string_value(sym);
698 fprintf(out, "CONFIG_%s=\"", sym->name);
699 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
701 l = strcspn(str, "\"\\");
703 fwrite(str, l, 1, out);
704 fwrite(str, l, 1, out_h);
709 fprintf(out, "\\%c", *str);
710 fprintf(out_h, "\\%c", *str);
714 fputs("\"\n", out_h);
717 str = sym_get_string_value(sym);
718 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
719 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
720 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
724 str = sym_get_string_value(sym);
725 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
726 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
735 name = getenv("KCONFIG_AUTOHEADER");
737 name = "include/linux/autoconf.h";
738 if (rename(".tmpconfig.h", name))
740 name = getenv("KCONFIG_AUTOCONFIG");
742 name = "include/config/auto.conf";
744 * This must be the last step, kbuild has a dependency on auto.conf
745 * and this marks the successful completion of the previous steps.
747 if (rename(".tmpconfig", name))