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/$ARCH/defconfig";
26 static void conf_warning(const char *fmt
, ...)
30 fprintf(stderr
, "%s:%d:warning: ", conf_filename
, conf_lineno
);
31 vfprintf(stderr
, fmt
, ap
);
32 fprintf(stderr
, "\n");
37 const char *conf_get_configname(void)
39 char *name
= getenv("KCONFIG_CONFIG");
41 return name
? name
: ".config";
44 const char *conf_get_autoconfig_name(void)
46 char *name
= getenv("KCONFIG_AUTOCONFIG");
48 return name
? name
: "include/config/auto.conf";
51 static char *conf_expand_value(const char *in
)
55 static char res_value
[SYMBOL_MAXLENGTH
];
56 char *dst
, name
[SYMBOL_MAXLENGTH
];
60 while ((src
= strchr(in
, '$'))) {
61 strncat(res_value
, in
, src
- in
);
64 while (isalnum(*src
) || *src
== '_')
67 sym
= sym_lookup(name
, 0);
69 strcat(res_value
, sym_get_string_value(sym
));
72 strcat(res_value
, in
);
77 char *conf_get_default_confname(void)
80 static char fullname
[PATH_MAX
+1];
83 name
= conf_expand_value(conf_defname
);
84 env
= getenv(SRCTREE
);
86 sprintf(fullname
, "%s/%s", env
, name
);
87 if (!stat(fullname
, &buf
))
93 static int conf_set_sym_val(struct symbol
*sym
, int def
, int def_flags
, char *p
)
100 sym
->def
[def
].tri
= mod
;
101 sym
->flags
|= def_flags
;
106 sym
->def
[def
].tri
= yes
;
107 sym
->flags
|= def_flags
;
111 sym
->def
[def
].tri
= no
;
112 sym
->flags
|= def_flags
;
115 conf_warning("symbol value '%s' invalid for %s", p
, sym
->name
);
119 for (p2
= p
; *p2
&& !isspace(*p2
); p2
++)
121 sym
->type
= S_STRING
;
127 for (p2
= p
; (p2
= strpbrk(p2
, "\"\\")); p2
++) {
132 memmove(p2
, p2
+ 1, strlen(p2
));
135 conf_warning("invalid string found");
141 if (sym_string_valid(sym
, p
)) {
142 sym
->def
[def
].val
= strdup(p
);
143 sym
->flags
|= def_flags
;
145 conf_warning("symbol value '%s' invalid for %s", p
, sym
->name
);
155 int conf_read_simple(const char *name
, int def
)
164 in
= zconf_fopen(name
);
166 struct property
*prop
;
168 name
= conf_get_configname();
169 in
= zconf_fopen(name
);
172 sym_add_change_count(1);
173 if (!sym_defconfig_list
) {
175 sym_calc_value(modules_sym
);
179 for_all_defaults(sym_defconfig_list
, prop
) {
180 if (expr_calc_value(prop
->visible
.expr
) == no
||
181 prop
->expr
->type
!= E_SYMBOL
)
183 name
= conf_expand_value(prop
->expr
->left
.sym
->name
);
184 in
= zconf_fopen(name
);
187 "# using defaults found in %s\n"
197 conf_filename
= name
;
202 def_flags
= SYMBOL_DEF
<< def
;
203 for_all_symbols(i
, sym
) {
204 sym
->flags
|= SYMBOL_CHANGED
;
205 sym
->flags
&= ~(def_flags
|SYMBOL_VALID
);
206 if (sym_is_choice(sym
))
207 sym
->flags
|= def_flags
;
212 if (sym
->def
[def
].val
)
213 free(sym
->def
[def
].val
);
215 sym
->def
[def
].val
= NULL
;
216 sym
->def
[def
].tri
= no
;
220 while (fgets(line
, sizeof(line
), in
)) {
225 if (memcmp(line
+ 2, "CONFIG_", 7))
227 p
= strchr(line
+ 9, ' ');
231 if (strncmp(p
, "is not set", 10))
233 if (def
== S_DEF_USER
) {
234 sym
= sym_find(line
+ 9);
236 sym_add_change_count(1);
240 sym
= sym_lookup(line
+ 9, 0);
241 if (sym
->type
== S_UNKNOWN
)
242 sym
->type
= S_BOOLEAN
;
244 if (sym
->flags
& def_flags
) {
245 conf_warning("override: reassigning to symbol %s", sym
->name
);
250 sym
->def
[def
].tri
= no
;
251 sym
->flags
|= def_flags
;
258 if (memcmp(line
, "CONFIG_", 7)) {
259 conf_warning("unexpected data");
262 p
= strchr(line
+ 7, '=');
266 p2
= strchr(p
, '\n');
272 if (def
== S_DEF_USER
) {
273 sym
= sym_find(line
+ 7);
275 sym_add_change_count(1);
279 sym
= sym_lookup(line
+ 7, 0);
280 if (sym
->type
== S_UNKNOWN
)
283 if (sym
->flags
& def_flags
) {
284 conf_warning("override: reassigning to symbol %s", sym
->name
);
286 if (conf_set_sym_val(sym
, def
, def_flags
, p
))
293 conf_warning("unexpected data");
296 if (sym
&& sym_is_choice_value(sym
)) {
297 struct symbol
*cs
= prop_get_symbol(sym_get_choice_prop(sym
));
298 switch (sym
->def
[def
].tri
) {
302 if (cs
->def
[def
].tri
== yes
) {
303 conf_warning("%s creates inconsistent choice state", sym
->name
);
304 cs
->flags
&= ~def_flags
;
308 if (cs
->def
[def
].tri
!= no
)
309 conf_warning("override: %s changes choice state", sym
->name
);
310 cs
->def
[def
].val
= sym
;
313 cs
->def
[def
].tri
= EXPR_OR(cs
->def
[def
].tri
, sym
->def
[def
].tri
);
319 sym_calc_value(modules_sym
);
323 int conf_read(const char *name
)
325 struct symbol
*sym
, *choice_sym
;
326 struct property
*prop
;
330 sym_set_change_count(0);
332 if (conf_read_simple(name
, S_DEF_USER
))
335 for_all_symbols(i
, sym
) {
337 if (sym_is_choice(sym
) || (sym
->flags
& SYMBOL_AUTO
))
339 if (sym_has_value(sym
) && (sym
->flags
& SYMBOL_WRITE
)) {
340 /* check that calculated value agrees with saved value */
344 if (sym
->def
[S_DEF_USER
].tri
!= sym_get_tristate_value(sym
))
346 if (!sym_is_choice(sym
))
349 if (!strcmp(sym
->curr
.val
, sym
->def
[S_DEF_USER
].val
))
353 } else if (!sym_has_value(sym
) && !(sym
->flags
& SYMBOL_WRITE
))
354 /* no previous value and not saved */
357 /* maybe print value in verbose mode... */
359 if (!sym_is_choice(sym
))
361 /* The choice symbol only has a set value (and thus is not new)
362 * if all its visible childs have values.
364 prop
= sym_get_choice_prop(sym
);
366 expr_list_for_each_sym(prop
->expr
, e
, choice_sym
)
367 if (choice_sym
->visible
!= no
)
368 flags
&= choice_sym
->flags
;
369 sym
->flags
&= flags
| ~SYMBOL_DEF_USER
;
372 for_all_symbols(i
, sym
) {
373 if (sym_has_value(sym
) && !sym_is_choice_value(sym
)) {
374 /* Reset values of generates values, so they'll appear
375 * as new, if they should become visible, but that
376 * doesn't quite work if the Kconfig and the saved
377 * configuration disagree.
379 if (sym
->visible
== no
&& !conf_unsaved
)
380 sym
->flags
&= ~SYMBOL_DEF_USER
;
385 /* Reset a string value if it's out of range */
386 if (sym_string_within_range(sym
, sym
->def
[S_DEF_USER
].val
))
388 sym
->flags
&= ~(SYMBOL_VALID
|SYMBOL_DEF_USER
);
397 sym_add_change_count(conf_warnings
|| conf_unsaved
);
402 /* Write a S_STRING */
403 static void conf_write_string(bool headerfile
, const char *name
,
404 const char *str
, FILE *out
)
408 fprintf(out
, "#define CONFIG_%s \"", name
);
410 fprintf(out
, "CONFIG_%s=\"", name
);
413 l
= strcspn(str
, "\"\\");
415 xfwrite(str
, l
, 1, out
);
420 fprintf(out
, "\\%c", *str
++);
425 static void conf_write_symbol(struct symbol
*sym
, enum symbol_type type
,
426 FILE *out
, bool write_no
)
433 switch (sym_get_tristate_value(sym
)) {
436 fprintf(out
, "# CONFIG_%s is not set\n", sym
->name
);
439 fprintf(out
, "CONFIG_%s=m\n", sym
->name
);
442 fprintf(out
, "CONFIG_%s=y\n", sym
->name
);
447 conf_write_string(false, sym
->name
, sym_get_string_value(sym
), out
);
451 str
= sym_get_string_value(sym
);
452 fprintf(out
, "CONFIG_%s=%s\n", sym
->name
, str
);
461 * Write out a minimal config.
462 * All values that has default values are skipped as this is redundant.
464 int conf_write_defconfig(const char *filename
)
470 out
= fopen(filename
, "w");
474 sym_clear_all_valid();
476 /* Traverse all menus to find all relevant symbols */
477 menu
= rootmenu
.list
;
483 if (!menu_is_visible(menu
))
485 } else if (!sym_is_choice(sym
)) {
487 if (!(sym
->flags
& SYMBOL_WRITE
))
489 sym
->flags
&= ~SYMBOL_WRITE
;
490 /* If we cannot change the symbol - skip */
491 if (!sym_is_changable(sym
))
493 /* If symbol equals to default value - skip */
494 if (strcmp(sym_get_string_value(sym
), sym_get_string_default(sym
)) == 0)
498 * If symbol is a choice value and equals to the
499 * default for a choice - skip.
500 * But only if value is bool and equal to "y" and
501 * choice is not "optional".
502 * (If choice is "optional" then all values can be "n")
504 if (sym_is_choice_value(sym
)) {
508 cs
= prop_get_symbol(sym_get_choice_prop(sym
));
509 ds
= sym_choice_default(cs
);
510 if (!sym_is_optional(cs
) && sym
== ds
) {
511 if ((sym
->type
== S_BOOLEAN
) &&
512 sym_get_tristate_value(sym
) == yes
)
516 conf_write_symbol(sym
, sym
->type
, out
, true);
519 if (menu
->list
!= NULL
) {
522 else if (menu
->next
!= NULL
) {
525 while ((menu
= menu
->parent
)) {
526 if (menu
->next
!= NULL
) {
537 int conf_write(const char *name
)
542 const char *basename
;
544 char dirname
[128], tmpname
[128], newname
[128];
545 enum symbol_type type
;
547 int use_timestamp
= 1;
551 if (name
&& name
[0]) {
555 if (!stat(name
, &st
) && S_ISDIR(st
.st_mode
)) {
556 strcpy(dirname
, name
);
557 strcat(dirname
, "/");
558 basename
= conf_get_configname();
559 } else if ((slash
= strrchr(name
, '/'))) {
560 int size
= slash
- name
+ 1;
561 memcpy(dirname
, name
, size
);
564 basename
= slash
+ 1;
566 basename
= conf_get_configname();
570 basename
= conf_get_configname();
572 sprintf(newname
, "%s%s", dirname
, basename
);
573 env
= getenv("KCONFIG_OVERWRITECONFIG");
575 sprintf(tmpname
, "%s.tmpconfig.%d", dirname
, (int)getpid());
576 out
= fopen(tmpname
, "w");
579 out
= fopen(newname
, "w");
584 sym
= sym_lookup("KERNELVERSION", 0);
587 env
= getenv("KCONFIG_NOTIMESTAMP");
592 "# Automatically generated make config: don't edit\n"
593 "# Linux kernel version: %s\n"
596 sym_get_string_value(sym
),
597 use_timestamp
? "# " : "",
598 use_timestamp
? ctime(&now
) : "");
600 if (!conf_get_changed())
601 sym_clear_all_valid();
603 menu
= rootmenu
.list
;
607 if (!menu_is_visible(menu
))
609 str
= menu_get_prompt(menu
);
614 } else if (!(sym
->flags
& SYMBOL_CHOICE
)) {
616 if (!(sym
->flags
& SYMBOL_WRITE
))
618 sym
->flags
&= ~SYMBOL_WRITE
;
620 if (type
== S_TRISTATE
) {
621 sym_calc_value(modules_sym
);
622 if (modules_sym
->curr
.tri
== no
)
625 /* Write config symbol to file */
626 conf_write_symbol(sym
, type
, out
, true);
636 else while ((menu
= menu
->parent
)) {
646 strcat(dirname
, basename
);
647 strcat(dirname
, ".old");
648 rename(newname
, dirname
);
649 if (rename(tmpname
, newname
))
654 "# configuration written to %s\n"
657 sym_set_change_count(0);
662 static int conf_split_config(void)
671 name
= conf_get_autoconfig_name();
672 conf_read_simple(name
, S_DEF_AUTO
);
674 if (chdir("include/config"))
678 for_all_symbols(i
, sym
) {
680 if ((sym
->flags
& SYMBOL_AUTO
) || !sym
->name
)
682 if (sym
->flags
& SYMBOL_WRITE
) {
683 if (sym
->flags
& SYMBOL_DEF_AUTO
) {
685 * symbol has old and new value,
691 if (sym_get_tristate_value(sym
) ==
692 sym
->def
[S_DEF_AUTO
].tri
)
698 if (!strcmp(sym_get_string_value(sym
),
699 sym
->def
[S_DEF_AUTO
].val
))
707 * If there is no old value, only 'no' (unset)
708 * is allowed as new value.
713 if (sym_get_tristate_value(sym
) == no
)
720 } else if (!(sym
->flags
& SYMBOL_DEF_AUTO
))
721 /* There is neither an old nor a new value. */
724 * There is an old value, but no new value ('no' (unset)
725 * isn't saved in auto.conf, so the old value is always
726 * different from 'no').
729 /* Replace all '_' and append ".h" */
734 *d
++ = (c
== '_') ? '/' : c
;
738 /* Assume directory path already exists. */
739 fd
= open(path
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0644);
741 if (errno
!= ENOENT
) {
746 * Create directory components,
747 * unless they exist already.
750 while ((d
= strchr(d
, '/'))) {
752 if (stat(path
, &sb
) && mkdir(path
, 0755)) {
759 fd
= open(path
, O_WRONLY
| O_CREAT
| O_TRUNC
, 0644);
774 int conf_write_autoconf(void)
779 FILE *out
, *tristate
, *out_h
;
783 sym_clear_all_valid();
785 file_write_dep("include/config/auto.conf.cmd");
787 if (conf_split_config())
790 out
= fopen(".tmpconfig", "w");
794 tristate
= fopen(".tmpconfig_tristate", "w");
800 out_h
= fopen(".tmpconfig.h", "w");
807 sym
= sym_lookup("KERNELVERSION", 0);
811 "# Automatically generated make config: don't edit\n"
812 "# Linux kernel version: %s\n"
815 sym_get_string_value(sym
), ctime(&now
));
816 fprintf(tristate
, "#\n"
817 "# Automatically generated - do not edit\n"
819 fprintf(out_h
, "/*\n"
820 " * Automatically generated C config: don't edit\n"
821 " * Linux kernel version: %s\n"
824 "#define AUTOCONF_INCLUDED\n",
825 sym_get_string_value(sym
), ctime(&now
));
827 for_all_symbols(i
, sym
) {
829 if (!(sym
->flags
& SYMBOL_WRITE
) || !sym
->name
)
832 /* write symbol to config file */
833 conf_write_symbol(sym
, sym
->type
, out
, false);
835 /* update autoconf and tristate files */
839 switch (sym_get_tristate_value(sym
)) {
843 fprintf(tristate
, "CONFIG_%s=M\n", sym
->name
);
844 fprintf(out_h
, "#define CONFIG_%s_MODULE 1\n", sym
->name
);
847 if (sym
->type
== S_TRISTATE
)
848 fprintf(tristate
, "CONFIG_%s=Y\n",
850 fprintf(out_h
, "#define CONFIG_%s 1\n", sym
->name
);
855 conf_write_string(true, sym
->name
, sym_get_string_value(sym
), out_h
);
858 str
= sym_get_string_value(sym
);
859 if (str
[0] != '0' || (str
[1] != 'x' && str
[1] != 'X')) {
860 fprintf(out_h
, "#define CONFIG_%s 0x%s\n", sym
->name
, str
);
864 str
= sym_get_string_value(sym
);
865 fprintf(out_h
, "#define CONFIG_%s %s\n", sym
->name
, str
);
875 name
= getenv("KCONFIG_AUTOHEADER");
877 name
= "include/generated/autoconf.h";
878 if (rename(".tmpconfig.h", name
))
880 name
= getenv("KCONFIG_TRISTATE");
882 name
= "include/config/tristate.conf";
883 if (rename(".tmpconfig_tristate", name
))
885 name
= conf_get_autoconfig_name();
887 * This must be the last step, kbuild has a dependency on auto.conf
888 * and this marks the successful completion of the previous steps.
890 if (rename(".tmpconfig", name
))
896 static int sym_change_count
;
897 static void (*conf_changed_callback
)(void);
899 void sym_set_change_count(int count
)
901 int _sym_change_count
= sym_change_count
;
902 sym_change_count
= count
;
903 if (conf_changed_callback
&&
904 (bool)_sym_change_count
!= (bool)count
)
905 conf_changed_callback();
908 void sym_add_change_count(int count
)
910 sym_set_change_count(count
+ sym_change_count
);
913 bool conf_get_changed(void)
915 return sym_change_count
;
918 void conf_set_changed_callback(void (*fn
)(void))
920 conf_changed_callback
= fn
;
923 static void randomize_choice_values(struct symbol
*csym
)
925 struct property
*prop
;
931 * If choice is mod then we may have more items slected
932 * and if no then no-one.
933 * In both cases stop.
935 if (csym
->curr
.tri
!= yes
)
938 prop
= sym_get_choice_prop(csym
);
940 /* count entries in choice block */
942 expr_list_for_each_sym(prop
->expr
, e
, sym
)
946 * find a random value and set it to yes,
947 * set the rest to no so we have only one set
949 def
= (rand() % cnt
);
952 expr_list_for_each_sym(prop
->expr
, e
, sym
) {
954 sym
->def
[S_DEF_USER
].tri
= yes
;
955 csym
->def
[S_DEF_USER
].val
= sym
;
958 sym
->def
[S_DEF_USER
].tri
= no
;
961 csym
->flags
|= SYMBOL_DEF_USER
;
962 /* clear VALID to get value calculated */
963 csym
->flags
&= ~(SYMBOL_VALID
);
966 static void set_all_choice_values(struct symbol
*csym
)
968 struct property
*prop
;
972 prop
= sym_get_choice_prop(csym
);
975 * Set all non-assinged choice values to no
977 expr_list_for_each_sym(prop
->expr
, e
, sym
) {
978 if (!sym_has_value(sym
))
979 sym
->def
[S_DEF_USER
].tri
= no
;
981 csym
->flags
|= SYMBOL_DEF_USER
;
982 /* clear VALID to get value calculated */
983 csym
->flags
&= ~(SYMBOL_VALID
);
986 void conf_set_all_new_symbols(enum conf_def_mode mode
)
988 struct symbol
*sym
, *csym
;
991 for_all_symbols(i
, sym
) {
992 if (sym_has_value(sym
))
994 switch (sym_get_type(sym
)) {
999 sym
->def
[S_DEF_USER
].tri
= yes
;
1002 sym
->def
[S_DEF_USER
].tri
= mod
;
1005 sym
->def
[S_DEF_USER
].tri
= no
;
1008 cnt
= sym_get_type(sym
) == S_TRISTATE
? 3 : 2;
1009 sym
->def
[S_DEF_USER
].tri
= (tristate
)(rand() % cnt
);
1014 if (!(sym_is_choice(sym
) && mode
== def_random
))
1015 sym
->flags
|= SYMBOL_DEF_USER
;
1023 sym_clear_all_valid();
1026 * We have different type of choice blocks.
1027 * If curr.tri equal to mod then we can select several
1028 * choice symbols in one block.
1029 * In this case we do nothing.
1030 * If curr.tri equal yes then only one symbol can be
1031 * selected in a choice block and we set it to yes,
1032 * and the rest to no.
1034 for_all_symbols(i
, csym
) {
1035 if (sym_has_value(csym
) || !sym_is_choice(csym
))
1038 sym_calc_value(csym
);
1039 if (mode
== def_random
)
1040 randomize_choice_values(csym
);
1042 set_all_choice_values(csym
);