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);
228 sym
= sym_lookup(line
+ 9, 0);
229 if (sym
->type
== S_UNKNOWN
)
230 sym
->type
= S_BOOLEAN
;
232 if (sym
->flags
& def_flags
) {
233 conf_warning("override: reassigning to symbol %s", sym
->name
);
238 sym
->def
[def
].tri
= no
;
239 sym
->flags
|= def_flags
;
246 if (memcmp(line
, "CONFIG_", 7)) {
247 conf_warning("unexpected data");
250 p
= strchr(line
+ 7, '=');
254 p2
= strchr(p
, '\n');
260 if (def
== S_DEF_USER
) {
261 sym
= sym_find(line
+ 7);
265 sym
= sym_lookup(line
+ 7, 0);
266 if (sym
->type
== S_UNKNOWN
)
269 if (sym
->flags
& def_flags
) {
270 conf_warning("override: reassigning to symbol %s", sym
->name
);
272 if (conf_set_sym_val(sym
, def
, def_flags
, p
))
279 conf_warning("unexpected data");
282 if (sym
&& sym_is_choice_value(sym
)) {
283 struct symbol
*cs
= prop_get_symbol(sym_get_choice_prop(sym
));
284 switch (sym
->def
[def
].tri
) {
288 if (cs
->def
[def
].tri
== yes
) {
289 conf_warning("%s creates inconsistent choice state", sym
->name
);
290 cs
->flags
&= ~def_flags
;
294 if (cs
->def
[def
].tri
!= no
)
295 conf_warning("override: %s changes choice state", sym
->name
);
296 cs
->def
[def
].val
= sym
;
299 cs
->def
[def
].tri
= EXPR_OR(cs
->def
[def
].tri
, sym
->def
[def
].tri
);
305 sym_calc_value(modules_sym
);
309 int conf_read(const char *name
)
311 struct symbol
*sym
, *choice_sym
;
312 struct property
*prop
;
316 sym_set_change_count(0);
318 if (conf_read_simple(name
, S_DEF_USER
))
321 for_all_symbols(i
, sym
) {
323 if (sym_is_choice(sym
) || (sym
->flags
& SYMBOL_AUTO
))
325 if (sym_has_value(sym
) && (sym
->flags
& SYMBOL_WRITE
)) {
326 /* check that calculated value agrees with saved value */
330 if (sym
->def
[S_DEF_USER
].tri
!= sym_get_tristate_value(sym
))
332 if (!sym_is_choice(sym
))
335 if (!strcmp(sym
->curr
.val
, sym
->def
[S_DEF_USER
].val
))
339 } else if (!sym_has_value(sym
) && !(sym
->flags
& SYMBOL_WRITE
))
340 /* no previous value and not saved */
343 /* maybe print value in verbose mode... */
345 if (!sym_is_choice(sym
))
347 /* The choice symbol only has a set value (and thus is not new)
348 * if all its visible childs have values.
350 prop
= sym_get_choice_prop(sym
);
352 expr_list_for_each_sym(prop
->expr
, e
, choice_sym
)
353 if (choice_sym
->visible
!= no
)
354 flags
&= choice_sym
->flags
;
355 sym
->flags
&= flags
| ~SYMBOL_DEF_USER
;
358 for_all_symbols(i
, sym
) {
359 if (sym_has_value(sym
) && !sym_is_choice_value(sym
)) {
360 /* Reset values of generates values, so they'll appear
361 * as new, if they should become visible, but that
362 * doesn't quite work if the Kconfig and the saved
363 * configuration disagree.
365 if (sym
->visible
== no
&& !conf_unsaved
)
366 sym
->flags
&= ~SYMBOL_DEF_USER
;
371 /* Reset a string value if it's out of range */
372 if (sym_string_within_range(sym
, sym
->def
[S_DEF_USER
].val
))
374 sym
->flags
&= ~(SYMBOL_VALID
|SYMBOL_DEF_USER
);
383 sym_add_change_count(conf_warnings
|| conf_unsaved
);
388 int conf_write(const char *name
)
393 const char *basename
;
394 char dirname
[128], tmpname
[128], newname
[128];
398 int use_timestamp
= 1;
402 if (name
&& name
[0]) {
406 if (!stat(name
, &st
) && S_ISDIR(st
.st_mode
)) {
407 strcpy(dirname
, name
);
408 strcat(dirname
, "/");
409 basename
= conf_get_configname();
410 } else if ((slash
= strrchr(name
, '/'))) {
411 int size
= slash
- name
+ 1;
412 memcpy(dirname
, name
, size
);
415 basename
= slash
+ 1;
417 basename
= conf_get_configname();
421 basename
= conf_get_configname();
423 sprintf(newname
, "%s%s", dirname
, basename
);
424 env
= getenv("KCONFIG_OVERWRITECONFIG");
426 sprintf(tmpname
, "%s.tmpconfig.%d", dirname
, (int)getpid());
427 out
= fopen(tmpname
, "w");
430 out
= fopen(newname
, "w");
435 sym
= sym_lookup("KERNELVERSION", 0);
438 env
= getenv("KCONFIG_NOTIMESTAMP");
443 "# Automatically generated make config: don't edit\n"
444 "# Linux kernel version: %s\n"
447 sym_get_string_value(sym
),
448 use_timestamp
? "# " : "",
449 use_timestamp
? ctime(&now
) : "");
451 if (!conf_get_changed())
452 sym_clear_all_valid();
454 menu
= rootmenu
.list
;
458 if (!menu_is_visible(menu
))
460 str
= menu_get_prompt(menu
);
465 } else if (!(sym
->flags
& SYMBOL_CHOICE
)) {
467 if (!(sym
->flags
& SYMBOL_WRITE
))
469 sym
->flags
&= ~SYMBOL_WRITE
;
471 if (type
== S_TRISTATE
) {
472 sym_calc_value(modules_sym
);
473 if (modules_sym
->curr
.tri
== no
)
479 switch (sym_get_tristate_value(sym
)) {
481 fprintf(out
, "# CONFIG_%s is not set\n", sym
->name
);
484 fprintf(out
, "CONFIG_%s=m\n", sym
->name
);
487 fprintf(out
, "CONFIG_%s=y\n", sym
->name
);
492 str
= sym_get_string_value(sym
);
493 fprintf(out
, "CONFIG_%s=\"", sym
->name
);
495 l
= strcspn(str
, "\"\\");
497 fwrite(str
, l
, 1, out
);
502 fprintf(out
, "\\%c", *str
++);
507 str
= sym_get_string_value(sym
);
508 if (str
[0] != '0' || (str
[1] != 'x' && str
[1] != 'X')) {
509 fprintf(out
, "CONFIG_%s=%s\n", sym
->name
, str
);
513 str
= sym_get_string_value(sym
);
514 fprintf(out
, "CONFIG_%s=%s\n", sym
->name
, str
);
526 else while ((menu
= menu
->parent
)) {
536 strcat(dirname
, basename
);
537 strcat(dirname
, ".old");
538 rename(newname
, dirname
);
539 if (rename(tmpname
, newname
))
544 "# configuration written to %s\n"
547 sym_set_change_count(0);
552 int conf_split_config(void)
554 char *name
, path
[128];
560 name
= getenv("KCONFIG_AUTOCONFIG");
562 name
= "include/config/auto.conf";
563 conf_read_simple(name
, S_DEF_AUTO
);
565 if (chdir("include/config"))
569 for_all_symbols(i
, sym
) {
571 if ((sym
->flags
& SYMBOL_AUTO
) || !sym
->name
)
573 if (sym
->flags
& SYMBOL_WRITE
) {
574 if (sym
->flags
& SYMBOL_DEF_AUTO
) {
576 * symbol has old and new value,
582 if (sym_get_tristate_value(sym
) ==
583 sym
->def
[S_DEF_AUTO
].tri
)
589 if (!strcmp(sym_get_string_value(sym
),
590 sym
->def
[S_DEF_AUTO
].val
))
598 * If there is no old value, only 'no' (unset)
599 * is allowed as new value.
604 if (sym_get_tristate_value(sym
) == no
)
611 } else if (!(sym
->flags
& SYMBOL_DEF_AUTO
))
612 /* There is neither an old nor a new value. */
615 * There is an old value, but no new value ('no' (unset)
616 * isn't saved in auto.conf, so the old value is always
617 * different from 'no').
620 /* Replace all '_' and append ".h" */
625 *d
++ = (c
== '_') ? '/' : c
;
629 /* Assume directory path already exists. */
630 fd
= open(path
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0644);
632 if (errno
!= ENOENT
) {
637 * Create directory components,
638 * unless they exist already.
641 while ((d
= strchr(d
, '/'))) {
643 if (stat(path
, &sb
) && mkdir(path
, 0755)) {
650 fd
= open(path
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0644);
665 int conf_write_autoconf(void)
674 sym_clear_all_valid();
676 file_write_dep("include/config/auto.conf.cmd");
678 if (conf_split_config())
681 out
= fopen(".tmpconfig", "w");
685 out_h
= fopen(".tmpconfig.h", "w");
691 sym
= sym_lookup("KERNELVERSION", 0);
695 "# Automatically generated make config: don't edit\n"
696 "# Linux kernel version: %s\n"
699 sym_get_string_value(sym
), ctime(&now
));
700 fprintf(out_h
, "/*\n"
701 " * Automatically generated C config: don't edit\n"
702 " * Linux kernel version: %s\n"
705 "#define AUTOCONF_INCLUDED\n",
706 sym_get_string_value(sym
), ctime(&now
));
708 for_all_symbols(i
, sym
) {
710 if (!(sym
->flags
& SYMBOL_WRITE
) || !sym
->name
)
715 switch (sym_get_tristate_value(sym
)) {
719 fprintf(out
, "CONFIG_%s=m\n", sym
->name
);
720 fprintf(out_h
, "#define CONFIG_%s_MODULE 1\n", sym
->name
);
723 fprintf(out
, "CONFIG_%s=y\n", sym
->name
);
724 fprintf(out_h
, "#define CONFIG_%s 1\n", sym
->name
);
729 str
= sym_get_string_value(sym
);
730 fprintf(out
, "CONFIG_%s=\"", sym
->name
);
731 fprintf(out_h
, "#define CONFIG_%s \"", sym
->name
);
733 l
= strcspn(str
, "\"\\");
735 fwrite(str
, l
, 1, out
);
736 fwrite(str
, l
, 1, out_h
);
741 fprintf(out
, "\\%c", *str
);
742 fprintf(out_h
, "\\%c", *str
);
746 fputs("\"\n", out_h
);
749 str
= sym_get_string_value(sym
);
750 if (str
[0] != '0' || (str
[1] != 'x' && str
[1] != 'X')) {
751 fprintf(out
, "CONFIG_%s=%s\n", sym
->name
, str
);
752 fprintf(out_h
, "#define CONFIG_%s 0x%s\n", sym
->name
, str
);
756 str
= sym_get_string_value(sym
);
757 fprintf(out
, "CONFIG_%s=%s\n", sym
->name
, str
);
758 fprintf(out_h
, "#define CONFIG_%s %s\n", sym
->name
, str
);
767 name
= getenv("KCONFIG_AUTOHEADER");
769 name
= "include/linux/autoconf.h";
770 if (rename(".tmpconfig.h", name
))
772 name
= getenv("KCONFIG_AUTOCONFIG");
774 name
= "include/config/auto.conf";
776 * This must be the last step, kbuild has a dependency on auto.conf
777 * and this marks the successful completion of the previous steps.
779 if (rename(".tmpconfig", name
))
785 static int sym_change_count
;
786 static void (*conf_changed_callback
)(void);
788 void sym_set_change_count(int count
)
790 int _sym_change_count
= sym_change_count
;
791 sym_change_count
= count
;
792 if (conf_changed_callback
&&
793 (bool)_sym_change_count
!= (bool)count
)
794 conf_changed_callback();
797 void sym_add_change_count(int count
)
799 sym_set_change_count(count
+ sym_change_count
);
802 bool conf_get_changed(void)
804 return sym_change_count
;
807 void conf_set_changed_callback(void (*fn
)(void))
809 conf_changed_callback
= fn
;
813 void conf_set_all_new_symbols(enum conf_def_mode mode
)
815 struct symbol
*sym
, *csym
;
816 struct property
*prop
;
820 for_all_symbols(i
, sym
) {
821 if (sym_has_value(sym
))
823 switch (sym_get_type(sym
)) {
828 sym
->def
[S_DEF_USER
].tri
= yes
;
831 sym
->def
[S_DEF_USER
].tri
= mod
;
834 sym
->def
[S_DEF_USER
].tri
= no
;
837 sym
->def
[S_DEF_USER
].tri
= (tristate
)(rand() % 3);
842 if (!sym_is_choice(sym
) || mode
!= def_random
)
843 sym
->flags
|= SYMBOL_DEF_USER
;
852 sym_calc_value(modules_sym
);
854 if (mode
!= def_random
)
857 for_all_symbols(i
, csym
) {
858 if (sym_has_value(csym
) || !sym_is_choice(csym
))
861 sym_calc_value(csym
);
862 prop
= sym_get_choice_prop(csym
);
866 expr_list_for_each_sym(prop
->expr
, e
, sym
) {
867 if (sym
->visible
== no
)
870 csym
->def
[S_DEF_USER
].val
= sym
;
874 if (def
>= 0 || cnt
< 2)
876 def
= (rand() % cnt
) + 1;
878 csym
->flags
|= SYMBOL_DEF_USER
;