blob: a04da3459f0fa17ee71e155bcdb56d71a27d71b5 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>
3 * Released under the terms of the GNU GPL v2.0.
4 */
5
6#include <sys/stat.h>
7#include <ctype.h>
Roman Zippel2e3646e2006-06-08 22:12:42 -07008#include <fcntl.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009#include <stdio.h>
10#include <stdlib.h>
11#include <string.h>
12#include <time.h>
13#include <unistd.h>
14
15#define LKC_DIRECT_LINK
16#include "lkc.h"
17
Roman Zippelc1a0f5e2005-11-08 21:34:54 -080018static void conf_warning(const char *fmt, ...)
19 __attribute__ ((format (printf, 1, 2)));
20
21static const char *conf_filename;
22static int conf_lineno, conf_warnings, conf_unsaved;
23
Linus Torvalds1da177e2005-04-16 15:20:36 -070024const char conf_defname[] = "arch/$ARCH/defconfig";
25
Roman Zippelc1a0f5e2005-11-08 21:34:54 -080026static void conf_warning(const char *fmt, ...)
27{
28 va_list ap;
29 va_start(ap, fmt);
30 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
31 vfprintf(stderr, fmt, ap);
32 fprintf(stderr, "\n");
33 va_end(ap);
34 conf_warnings++;
35}
36
Roman Zippel14cdd3c2006-06-08 22:12:51 -070037const char *conf_get_configname(void)
38{
39 char *name = getenv("KCONFIG_CONFIG");
40
41 return name ? name : ".config";
42}
43
Markus Heidelberg12122f62009-05-18 01:36:54 +020044const char *conf_get_autoconfig_name(void)
45{
46 char *name = getenv("KCONFIG_AUTOCONFIG");
47
48 return name ? name : "include/config/auto.conf";
49}
50
J.A. Magallon48b9d032005-06-25 14:59:22 -070051static char *conf_expand_value(const char *in)
Linus Torvalds1da177e2005-04-16 15:20:36 -070052{
53 struct symbol *sym;
J.A. Magallon48b9d032005-06-25 14:59:22 -070054 const char *src;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055 static char res_value[SYMBOL_MAXLENGTH];
56 char *dst, name[SYMBOL_MAXLENGTH];
57
58 res_value[0] = 0;
59 dst = name;
60 while ((src = strchr(in, '$'))) {
61 strncat(res_value, in, src - in);
62 src++;
63 dst = name;
64 while (isalnum(*src) || *src == '_')
65 *dst++ = *src++;
66 *dst = 0;
67 sym = sym_lookup(name, 0);
68 sym_calc_value(sym);
69 strcat(res_value, sym_get_string_value(sym));
70 in = src;
71 }
72 strcat(res_value, in);
73
74 return res_value;
75}
76
77char *conf_get_default_confname(void)
78{
79 struct stat buf;
80 static char fullname[PATH_MAX+1];
81 char *env, *name;
82
83 name = conf_expand_value(conf_defname);
84 env = getenv(SRCTREE);
85 if (env) {
86 sprintf(fullname, "%s/%s", env, name);
87 if (!stat(fullname, &buf))
88 return fullname;
89 }
90 return name;
91}
92
Sam Ravnborg9c900a92007-11-10 20:01:56 +010093static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
94{
95 char *p2;
96
97 switch (sym->type) {
98 case S_TRISTATE:
99 if (p[0] == 'm') {
100 sym->def[def].tri = mod;
101 sym->flags |= def_flags;
102 break;
103 }
104 case S_BOOLEAN:
105 if (p[0] == 'y') {
106 sym->def[def].tri = yes;
107 sym->flags |= def_flags;
108 break;
109 }
110 if (p[0] == 'n') {
111 sym->def[def].tri = no;
112 sym->flags |= def_flags;
113 break;
114 }
115 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
116 break;
117 case S_OTHER:
118 if (*p != '"') {
119 for (p2 = p; *p2 && !isspace(*p2); p2++)
120 ;
121 sym->type = S_STRING;
122 goto done;
123 }
124 case S_STRING:
125 if (*p++ != '"')
126 break;
127 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
128 if (*p2 == '"') {
129 *p2 = 0;
130 break;
131 }
132 memmove(p2, p2 + 1, strlen(p2));
133 }
134 if (!p2) {
135 conf_warning("invalid string found");
136 return 1;
137 }
138 case S_INT:
139 case S_HEX:
140 done:
141 if (sym_string_valid(sym, p)) {
142 sym->def[def].val = strdup(p);
143 sym->flags |= def_flags;
144 } else {
145 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
146 return 1;
147 }
148 break;
149 default:
150 ;
151 }
152 return 0;
153}
154
Roman Zippel669bfad2006-06-08 22:12:42 -0700155int conf_read_simple(const char *name, int def)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700156{
157 FILE *in = NULL;
158 char line[1024];
159 char *p, *p2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160 struct symbol *sym;
Roman Zippel669bfad2006-06-08 22:12:42 -0700161 int i, def_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700162
163 if (name) {
164 in = zconf_fopen(name);
165 } else {
Roman Zippelface4372006-06-08 22:12:45 -0700166 struct property *prop;
167
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700168 name = conf_get_configname();
Roman Zippelddc97ca2006-06-08 22:12:38 -0700169 in = zconf_fopen(name);
170 if (in)
171 goto load;
Karsten Wiesebfc10002006-12-13 00:34:07 -0800172 sym_add_change_count(1);
Roman Zippelface4372006-06-08 22:12:45 -0700173 if (!sym_defconfig_list)
174 return 1;
175
176 for_all_defaults(sym_defconfig_list, prop) {
177 if (expr_calc_value(prop->visible.expr) == no ||
178 prop->expr->type != E_SYMBOL)
179 continue;
180 name = conf_expand_value(prop->expr->left.sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700181 in = zconf_fopen(name);
182 if (in) {
Arnaldo Carvalho de Melo3b9fa092005-05-05 15:09:46 -0700183 printf(_("#\n"
Roman Zippelddc97ca2006-06-08 22:12:38 -0700184 "# using defaults found in %s\n"
185 "#\n"), name);
186 goto load;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 }
188 }
189 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 if (!in)
191 return 1;
192
Roman Zippelddc97ca2006-06-08 22:12:38 -0700193load:
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800194 conf_filename = name;
195 conf_lineno = 0;
196 conf_warnings = 0;
197 conf_unsaved = 0;
198
Roman Zippel669bfad2006-06-08 22:12:42 -0700199 def_flags = SYMBOL_DEF << def;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200 for_all_symbols(i, sym) {
Roman Zippel669bfad2006-06-08 22:12:42 -0700201 sym->flags |= SYMBOL_CHANGED;
202 sym->flags &= ~(def_flags|SYMBOL_VALID);
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800203 if (sym_is_choice(sym))
Roman Zippel669bfad2006-06-08 22:12:42 -0700204 sym->flags |= def_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 switch (sym->type) {
206 case S_INT:
207 case S_HEX:
208 case S_STRING:
Roman Zippel669bfad2006-06-08 22:12:42 -0700209 if (sym->def[def].val)
210 free(sym->def[def].val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700211 default:
Roman Zippel669bfad2006-06-08 22:12:42 -0700212 sym->def[def].val = NULL;
213 sym->def[def].tri = no;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 }
215 }
216
217 while (fgets(line, sizeof(line), in)) {
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800218 conf_lineno++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219 sym = NULL;
220 switch (line[0]) {
221 case '#':
222 if (memcmp(line + 2, "CONFIG_", 7))
223 continue;
224 p = strchr(line + 9, ' ');
225 if (!p)
226 continue;
227 *p++ = 0;
228 if (strncmp(p, "is not set", 10))
229 continue;
Roman Zippel669bfad2006-06-08 22:12:42 -0700230 if (def == S_DEF_USER) {
231 sym = sym_find(line + 9);
zippel@linux-m68k.org661b0682008-09-29 05:27:11 +0200232 if (!sym) {
233 sym_add_change_count(1);
Roman Zippel669bfad2006-06-08 22:12:42 -0700234 break;
zippel@linux-m68k.org661b0682008-09-29 05:27:11 +0200235 }
Roman Zippel669bfad2006-06-08 22:12:42 -0700236 } else {
237 sym = sym_lookup(line + 9, 0);
238 if (sym->type == S_UNKNOWN)
239 sym->type = S_BOOLEAN;
240 }
241 if (sym->flags & def_flags) {
Jan Engelhardtd84876f2008-01-03 23:33:44 +0100242 conf_warning("override: reassigning to symbol %s", sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 }
244 switch (sym->type) {
245 case S_BOOLEAN:
246 case S_TRISTATE:
Roman Zippel669bfad2006-06-08 22:12:42 -0700247 sym->def[def].tri = no;
248 sym->flags |= def_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 break;
250 default:
251 ;
252 }
253 break;
254 case 'C':
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800255 if (memcmp(line, "CONFIG_", 7)) {
256 conf_warning("unexpected data");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 continue;
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800258 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 p = strchr(line + 7, '=');
260 if (!p)
261 continue;
262 *p++ = 0;
263 p2 = strchr(p, '\n');
Matthew Wilcoxd3660a82006-07-13 12:54:07 -0600264 if (p2) {
265 *p2-- = 0;
266 if (*p2 == '\r')
267 *p2 = 0;
268 }
Roman Zippel669bfad2006-06-08 22:12:42 -0700269 if (def == S_DEF_USER) {
270 sym = sym_find(line + 7);
zippel@linux-m68k.org661b0682008-09-29 05:27:11 +0200271 if (!sym) {
272 sym_add_change_count(1);
Roman Zippel669bfad2006-06-08 22:12:42 -0700273 break;
zippel@linux-m68k.org661b0682008-09-29 05:27:11 +0200274 }
Roman Zippel669bfad2006-06-08 22:12:42 -0700275 } else {
276 sym = sym_lookup(line + 7, 0);
277 if (sym->type == S_UNKNOWN)
278 sym->type = S_OTHER;
279 }
280 if (sym->flags & def_flags) {
Jan Engelhardtd84876f2008-01-03 23:33:44 +0100281 conf_warning("override: reassigning to symbol %s", sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 }
Sam Ravnborg9c900a92007-11-10 20:01:56 +0100283 if (conf_set_sym_val(sym, def, def_flags, p))
284 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 break;
Matthew Wilcoxd3660a82006-07-13 12:54:07 -0600286 case '\r':
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 case '\n':
288 break;
289 default:
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800290 conf_warning("unexpected data");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 continue;
292 }
293 if (sym && sym_is_choice_value(sym)) {
294 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
Roman Zippel669bfad2006-06-08 22:12:42 -0700295 switch (sym->def[def].tri) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 case no:
297 break;
298 case mod:
Roman Zippel669bfad2006-06-08 22:12:42 -0700299 if (cs->def[def].tri == yes) {
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800300 conf_warning("%s creates inconsistent choice state", sym->name);
Roman Zippel669bfad2006-06-08 22:12:42 -0700301 cs->flags &= ~def_flags;
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800302 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 break;
304 case yes:
Jan Engelhardtd84876f2008-01-03 23:33:44 +0100305 if (cs->def[def].tri != no)
306 conf_warning("override: %s changes choice state", sym->name);
307 cs->def[def].val = sym;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 break;
309 }
Sam Ravnborgd6ee3572008-01-07 21:09:55 +0100310 cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 }
312 }
313 fclose(in);
314
315 if (modules_sym)
316 sym_calc_value(modules_sym);
Roman Zippel90389162005-11-08 21:34:49 -0800317 return 0;
318}
319
320int conf_read(const char *name)
321{
Roman Zippel7a962922008-01-14 04:50:23 +0100322 struct symbol *sym, *choice_sym;
Roman Zippel90389162005-11-08 21:34:49 -0800323 struct property *prop;
324 struct expr *e;
Roman Zippel669bfad2006-06-08 22:12:42 -0700325 int i, flags;
Roman Zippel90389162005-11-08 21:34:49 -0800326
Karsten Wiesebfc10002006-12-13 00:34:07 -0800327 sym_set_change_count(0);
Roman Zippelddc97ca2006-06-08 22:12:38 -0700328
Roman Zippel669bfad2006-06-08 22:12:42 -0700329 if (conf_read_simple(name, S_DEF_USER))
Roman Zippel90389162005-11-08 21:34:49 -0800330 return 1;
331
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 for_all_symbols(i, sym) {
333 sym_calc_value(sym);
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800334 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
335 goto sym_ok;
336 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
337 /* check that calculated value agrees with saved value */
338 switch (sym->type) {
339 case S_BOOLEAN:
340 case S_TRISTATE:
Roman Zippel0c1822e2006-06-08 22:12:41 -0700341 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800342 break;
343 if (!sym_is_choice(sym))
344 goto sym_ok;
345 default:
Roman Zippel0c1822e2006-06-08 22:12:41 -0700346 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800347 goto sym_ok;
348 break;
349 }
350 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
351 /* no previous value and not saved */
352 goto sym_ok;
353 conf_unsaved++;
354 /* maybe print value in verbose mode... */
355 sym_ok:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356 if (!sym_is_choice(sym))
357 continue;
Roman Zippeld8982ba2007-07-09 11:43:58 -0700358 /* The choice symbol only has a set value (and thus is not new)
359 * if all its visible childs have values.
360 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 prop = sym_get_choice_prop(sym);
Roman Zippel669bfad2006-06-08 22:12:42 -0700362 flags = sym->flags;
Roman Zippel7a962922008-01-14 04:50:23 +0100363 expr_list_for_each_sym(prop->expr, e, choice_sym)
364 if (choice_sym->visible != no)
365 flags &= choice_sym->flags;
Roman Zippel002d27b2006-07-13 13:22:38 +0200366 sym->flags &= flags | ~SYMBOL_DEF_USER;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367 }
368
Roman Zippeld8982ba2007-07-09 11:43:58 -0700369 for_all_symbols(i, sym) {
370 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
371 /* Reset values of generates values, so they'll appear
372 * as new, if they should become visible, but that
373 * doesn't quite work if the Kconfig and the saved
374 * configuration disagree.
375 */
376 if (sym->visible == no && !conf_unsaved)
377 sym->flags &= ~SYMBOL_DEF_USER;
378 switch (sym->type) {
379 case S_STRING:
380 case S_INT:
381 case S_HEX:
382 /* Reset a string value if it's out of range */
383 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
384 break;
385 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
386 conf_unsaved++;
387 break;
388 default:
389 break;
390 }
391 }
392 }
393
Karsten Wiesebfc10002006-12-13 00:34:07 -0800394 sym_add_change_count(conf_warnings || conf_unsaved);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700395
396 return 0;
397}
398
399int conf_write(const char *name)
400{
Roman Zippelc955cca2006-06-08 22:12:39 -0700401 FILE *out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 struct symbol *sym;
403 struct menu *menu;
404 const char *basename;
405 char dirname[128], tmpname[128], newname[128];
406 int type, l;
407 const char *str;
408 time_t now;
409 int use_timestamp = 1;
410 char *env;
411
412 dirname[0] = 0;
413 if (name && name[0]) {
414 struct stat st;
415 char *slash;
416
417 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
418 strcpy(dirname, name);
419 strcat(dirname, "/");
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700420 basename = conf_get_configname();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 } else if ((slash = strrchr(name, '/'))) {
422 int size = slash - name + 1;
423 memcpy(dirname, name, size);
424 dirname[size] = 0;
425 if (slash[1])
426 basename = slash + 1;
427 else
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700428 basename = conf_get_configname();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429 } else
430 basename = name;
431 } else
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700432 basename = conf_get_configname();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700434 sprintf(newname, "%s%s", dirname, basename);
435 env = getenv("KCONFIG_OVERWRITECONFIG");
436 if (!env || !*env) {
437 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
438 out = fopen(tmpname, "w");
439 } else {
440 *tmpname = 0;
441 out = fopen(newname, "w");
442 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 if (!out)
444 return 1;
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700445
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100446 sym = sym_lookup("KERNELVERSION", 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700447 sym_calc_value(sym);
448 time(&now);
449 env = getenv("KCONFIG_NOTIMESTAMP");
450 if (env && *env)
451 use_timestamp = 0;
452
Arnaldo Carvalho de Melo3b9fa092005-05-05 15:09:46 -0700453 fprintf(out, _("#\n"
454 "# Automatically generated make config: don't edit\n"
455 "# Linux kernel version: %s\n"
456 "%s%s"
457 "#\n"),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458 sym_get_string_value(sym),
459 use_timestamp ? "# " : "",
460 use_timestamp ? ctime(&now) : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461
Karsten Wieseb3214292006-12-13 00:34:06 -0800462 if (!conf_get_changed())
Linus Torvalds1da177e2005-04-16 15:20:36 -0700463 sym_clear_all_valid();
464
465 menu = rootmenu.list;
466 while (menu) {
467 sym = menu->sym;
468 if (!sym) {
469 if (!menu_is_visible(menu))
470 goto next;
471 str = menu_get_prompt(menu);
472 fprintf(out, "\n"
473 "#\n"
474 "# %s\n"
475 "#\n", str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 } else if (!(sym->flags & SYMBOL_CHOICE)) {
477 sym_calc_value(sym);
478 if (!(sym->flags & SYMBOL_WRITE))
479 goto next;
480 sym->flags &= ~SYMBOL_WRITE;
481 type = sym->type;
482 if (type == S_TRISTATE) {
483 sym_calc_value(modules_sym);
484 if (modules_sym->curr.tri == no)
485 type = S_BOOLEAN;
486 }
487 switch (type) {
488 case S_BOOLEAN:
489 case S_TRISTATE:
490 switch (sym_get_tristate_value(sym)) {
491 case no:
492 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 break;
494 case mod:
495 fprintf(out, "CONFIG_%s=m\n", sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 break;
497 case yes:
498 fprintf(out, "CONFIG_%s=y\n", sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 break;
500 }
501 break;
502 case S_STRING:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 str = sym_get_string_value(sym);
504 fprintf(out, "CONFIG_%s=\"", sym->name);
Roman Zippelc955cca2006-06-08 22:12:39 -0700505 while (1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700506 l = strcspn(str, "\"\\");
507 if (l) {
508 fwrite(str, l, 1, out);
Roman Zippelc955cca2006-06-08 22:12:39 -0700509 str += l;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 }
Roman Zippelc955cca2006-06-08 22:12:39 -0700511 if (!*str)
512 break;
513 fprintf(out, "\\%c", *str++);
514 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 fputs("\"\n", out);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 break;
517 case S_HEX:
518 str = sym_get_string_value(sym);
519 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
520 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521 break;
522 }
523 case S_INT:
524 str = sym_get_string_value(sym);
525 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700526 break;
527 }
528 }
529
530 next:
531 if (menu->list) {
532 menu = menu->list;
533 continue;
534 }
535 if (menu->next)
536 menu = menu->next;
537 else while ((menu = menu->parent)) {
538 if (menu->next) {
539 menu = menu->next;
540 break;
541 }
542 }
543 }
544 fclose(out);
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700545
546 if (*tmpname) {
Sam Ravnborg9a3d0fe2006-10-01 11:48:53 +0200547 strcat(dirname, basename);
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700548 strcat(dirname, ".old");
549 rename(newname, dirname);
550 if (rename(tmpname, newname))
551 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553
Roman Zippelddc97ca2006-06-08 22:12:38 -0700554 printf(_("#\n"
555 "# configuration written to %s\n"
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700556 "#\n"), newname);
Roman Zippelddc97ca2006-06-08 22:12:38 -0700557
Karsten Wiesebfc10002006-12-13 00:34:07 -0800558 sym_set_change_count(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
560 return 0;
561}
Roman Zippelc955cca2006-06-08 22:12:39 -0700562
Roman Zippel2e3646e2006-06-08 22:12:42 -0700563int conf_split_config(void)
564{
Markus Heidelberg12122f62009-05-18 01:36:54 +0200565 const char *name;
566 char path[128];
Roman Zippel2e3646e2006-06-08 22:12:42 -0700567 char *s, *d, c;
568 struct symbol *sym;
569 struct stat sb;
570 int res, i, fd;
571
Markus Heidelberg12122f62009-05-18 01:36:54 +0200572 name = conf_get_autoconfig_name();
Roman Zippel2e3646e2006-06-08 22:12:42 -0700573 conf_read_simple(name, S_DEF_AUTO);
574
575 if (chdir("include/config"))
576 return 1;
577
578 res = 0;
579 for_all_symbols(i, sym) {
580 sym_calc_value(sym);
581 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
582 continue;
583 if (sym->flags & SYMBOL_WRITE) {
584 if (sym->flags & SYMBOL_DEF_AUTO) {
585 /*
586 * symbol has old and new value,
587 * so compare them...
588 */
589 switch (sym->type) {
590 case S_BOOLEAN:
591 case S_TRISTATE:
592 if (sym_get_tristate_value(sym) ==
593 sym->def[S_DEF_AUTO].tri)
594 continue;
595 break;
596 case S_STRING:
597 case S_HEX:
598 case S_INT:
599 if (!strcmp(sym_get_string_value(sym),
600 sym->def[S_DEF_AUTO].val))
601 continue;
602 break;
603 default:
604 break;
605 }
606 } else {
607 /*
608 * If there is no old value, only 'no' (unset)
609 * is allowed as new value.
610 */
611 switch (sym->type) {
612 case S_BOOLEAN:
613 case S_TRISTATE:
614 if (sym_get_tristate_value(sym) == no)
615 continue;
616 break;
617 default:
618 break;
619 }
620 }
621 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
622 /* There is neither an old nor a new value. */
623 continue;
624 /* else
625 * There is an old value, but no new value ('no' (unset)
626 * isn't saved in auto.conf, so the old value is always
627 * different from 'no').
628 */
629
630 /* Replace all '_' and append ".h" */
631 s = sym->name;
632 d = path;
633 while ((c = *s++)) {
634 c = tolower(c);
635 *d++ = (c == '_') ? '/' : c;
636 }
637 strcpy(d, ".h");
638
639 /* Assume directory path already exists. */
640 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
641 if (fd == -1) {
642 if (errno != ENOENT) {
643 res = 1;
644 break;
645 }
646 /*
647 * Create directory components,
648 * unless they exist already.
649 */
650 d = path;
651 while ((d = strchr(d, '/'))) {
652 *d = 0;
653 if (stat(path, &sb) && mkdir(path, 0755)) {
654 res = 1;
655 goto out;
656 }
657 *d++ = '/';
658 }
659 /* Try it again. */
660 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
661 if (fd == -1) {
662 res = 1;
663 break;
664 }
665 }
666 close(fd);
667 }
668out:
669 if (chdir("../.."))
670 return 1;
671
672 return res;
673}
674
Roman Zippelc955cca2006-06-08 22:12:39 -0700675int conf_write_autoconf(void)
676{
677 struct symbol *sym;
678 const char *str;
Markus Heidelberg12122f62009-05-18 01:36:54 +0200679 const char *name;
Roman Zippelc955cca2006-06-08 22:12:39 -0700680 FILE *out, *out_h;
681 time_t now;
682 int i, l;
683
Roman Zippel2e3646e2006-06-08 22:12:42 -0700684 sym_clear_all_valid();
685
Roman Zippelc955cca2006-06-08 22:12:39 -0700686 file_write_dep("include/config/auto.conf.cmd");
687
Roman Zippel2e3646e2006-06-08 22:12:42 -0700688 if (conf_split_config())
689 return 1;
690
Roman Zippelc955cca2006-06-08 22:12:39 -0700691 out = fopen(".tmpconfig", "w");
692 if (!out)
693 return 1;
694
695 out_h = fopen(".tmpconfig.h", "w");
696 if (!out_h) {
697 fclose(out);
698 return 1;
699 }
700
701 sym = sym_lookup("KERNELVERSION", 0);
702 sym_calc_value(sym);
703 time(&now);
704 fprintf(out, "#\n"
705 "# Automatically generated make config: don't edit\n"
706 "# Linux kernel version: %s\n"
707 "# %s"
708 "#\n",
709 sym_get_string_value(sym), ctime(&now));
710 fprintf(out_h, "/*\n"
711 " * Automatically generated C config: don't edit\n"
712 " * Linux kernel version: %s\n"
713 " * %s"
714 " */\n"
715 "#define AUTOCONF_INCLUDED\n",
716 sym_get_string_value(sym), ctime(&now));
717
Roman Zippelc955cca2006-06-08 22:12:39 -0700718 for_all_symbols(i, sym) {
719 sym_calc_value(sym);
720 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
721 continue;
722 switch (sym->type) {
723 case S_BOOLEAN:
724 case S_TRISTATE:
725 switch (sym_get_tristate_value(sym)) {
726 case no:
727 break;
728 case mod:
729 fprintf(out, "CONFIG_%s=m\n", sym->name);
730 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
731 break;
732 case yes:
733 fprintf(out, "CONFIG_%s=y\n", sym->name);
734 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
735 break;
736 }
737 break;
738 case S_STRING:
739 str = sym_get_string_value(sym);
740 fprintf(out, "CONFIG_%s=\"", sym->name);
741 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
742 while (1) {
743 l = strcspn(str, "\"\\");
744 if (l) {
745 fwrite(str, l, 1, out);
746 fwrite(str, l, 1, out_h);
747 str += l;
748 }
749 if (!*str)
750 break;
751 fprintf(out, "\\%c", *str);
752 fprintf(out_h, "\\%c", *str);
753 str++;
754 }
755 fputs("\"\n", out);
756 fputs("\"\n", out_h);
757 break;
758 case S_HEX:
759 str = sym_get_string_value(sym);
760 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
761 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
762 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
763 break;
764 }
765 case S_INT:
766 str = sym_get_string_value(sym);
767 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
768 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
769 break;
770 default:
771 break;
772 }
773 }
774 fclose(out);
775 fclose(out_h);
776
777 name = getenv("KCONFIG_AUTOHEADER");
778 if (!name)
779 name = "include/linux/autoconf.h";
780 if (rename(".tmpconfig.h", name))
781 return 1;
Markus Heidelberg12122f62009-05-18 01:36:54 +0200782 name = conf_get_autoconfig_name();
Roman Zippelc955cca2006-06-08 22:12:39 -0700783 /*
784 * This must be the last step, kbuild has a dependency on auto.conf
785 * and this marks the successful completion of the previous steps.
786 */
787 if (rename(".tmpconfig", name))
788 return 1;
789
790 return 0;
791}
Karsten Wieseb3214292006-12-13 00:34:06 -0800792
Karsten Wiesebfc10002006-12-13 00:34:07 -0800793static int sym_change_count;
Karsten Wiese3b354c52006-12-13 00:34:08 -0800794static void (*conf_changed_callback)(void);
Karsten Wiesebfc10002006-12-13 00:34:07 -0800795
796void sym_set_change_count(int count)
797{
Karsten Wiese3b354c52006-12-13 00:34:08 -0800798 int _sym_change_count = sym_change_count;
Karsten Wiesebfc10002006-12-13 00:34:07 -0800799 sym_change_count = count;
Karsten Wiese3b354c52006-12-13 00:34:08 -0800800 if (conf_changed_callback &&
801 (bool)_sym_change_count != (bool)count)
802 conf_changed_callback();
Karsten Wiesebfc10002006-12-13 00:34:07 -0800803}
804
805void sym_add_change_count(int count)
806{
Karsten Wiese3b354c52006-12-13 00:34:08 -0800807 sym_set_change_count(count + sym_change_count);
Karsten Wiesebfc10002006-12-13 00:34:07 -0800808}
809
Karsten Wieseb3214292006-12-13 00:34:06 -0800810bool conf_get_changed(void)
811{
812 return sym_change_count;
813}
Karsten Wiese3b354c52006-12-13 00:34:08 -0800814
815void conf_set_changed_callback(void (*fn)(void))
816{
817 conf_changed_callback = fn;
818}
Roman Zippeldc7862e2008-05-06 04:55:55 +0200819
820
821void conf_set_all_new_symbols(enum conf_def_mode mode)
822{
823 struct symbol *sym, *csym;
824 struct property *prop;
825 struct expr *e;
826 int i, cnt, def;
827
828 for_all_symbols(i, sym) {
829 if (sym_has_value(sym))
830 continue;
831 switch (sym_get_type(sym)) {
832 case S_BOOLEAN:
833 case S_TRISTATE:
834 switch (mode) {
835 case def_yes:
836 sym->def[S_DEF_USER].tri = yes;
837 break;
838 case def_mod:
839 sym->def[S_DEF_USER].tri = mod;
840 break;
841 case def_no:
842 sym->def[S_DEF_USER].tri = no;
843 break;
844 case def_random:
845 sym->def[S_DEF_USER].tri = (tristate)(rand() % 3);
846 break;
847 default:
848 continue;
849 }
Sam Ravnborg184832c2009-03-15 11:05:12 +0100850 if (!(sym_is_choice(sym) && mode == def_random))
Roman Zippeldc7862e2008-05-06 04:55:55 +0200851 sym->flags |= SYMBOL_DEF_USER;
852 break;
853 default:
854 break;
855 }
856
857 }
858
Al Viroce97e132008-10-26 05:12:34 +0000859 sym_clear_all_valid();
Roman Zippeldc7862e2008-05-06 04:55:55 +0200860
861 if (mode != def_random)
862 return;
Sam Ravnborg184832c2009-03-15 11:05:12 +0100863 /*
864 * We have different type of choice blocks.
865 * If curr.tri equal to mod then we can select several
866 * choice symbols in one block.
867 * In this case we do nothing.
868 * If curr.tri equal yes then only one symbol can be
869 * selected in a choice block and we set it to yes,
870 * and the rest to no.
871 */
Roman Zippeldc7862e2008-05-06 04:55:55 +0200872 for_all_symbols(i, csym) {
873 if (sym_has_value(csym) || !sym_is_choice(csym))
874 continue;
875
876 sym_calc_value(csym);
Sam Ravnborg184832c2009-03-15 11:05:12 +0100877
878 if (csym->curr.tri != yes)
879 continue;
880
Roman Zippeldc7862e2008-05-06 04:55:55 +0200881 prop = sym_get_choice_prop(csym);
Sam Ravnborg184832c2009-03-15 11:05:12 +0100882
883 /* count entries in choice block */
884 cnt = 0;
885 expr_list_for_each_sym(prop->expr, e, sym)
886 cnt++;
887
888 /*
889 * find a random value and set it to yes,
890 * set the rest to no so we have only one set
891 */
892 def = (rand() % cnt);
893
894 cnt = 0;
895 expr_list_for_each_sym(prop->expr, e, sym) {
896 if (def == cnt++) {
897 sym->def[S_DEF_USER].tri = yes;
898 csym->def[S_DEF_USER].val = sym;
Roman Zippeldc7862e2008-05-06 04:55:55 +0200899 }
Sam Ravnborg184832c2009-03-15 11:05:12 +0100900 else {
901 sym->def[S_DEF_USER].tri = no;
902 }
Roman Zippeldc7862e2008-05-06 04:55:55 +0200903 }
904 csym->flags |= SYMBOL_DEF_USER;
Sam Ravnborg184832c2009-03-15 11:05:12 +0100905 /* clear VALID to get value calculated */
906 csym->flags &= ~(SYMBOL_VALID);
Roman Zippeldc7862e2008-05-06 04:55:55 +0200907 }
908}