blob: e0f402f3b75d94d765875a6299f1f154e23a1c32 [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/$ARCH/defconfig";
25
Roman Zippelc1a0f5e2005-11-08 21:34:54 -080026static void conf_warning(const char *fmt, ...)
27{
28 va_list ap;
29 va_start(ap, fmt);
30 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
31 vfprintf(stderr, fmt, ap);
32 fprintf(stderr, "\n");
33 va_end(ap);
34 conf_warnings++;
35}
36
Roman Zippel14cdd3c2006-06-08 22:12:51 -070037const char *conf_get_configname(void)
38{
39 char *name = getenv("KCONFIG_CONFIG");
40
41 return name ? name : ".config";
42}
43
J.A. Magallon48b9d032005-06-25 14:59:22 -070044static char *conf_expand_value(const char *in)
Linus Torvalds1da177e2005-04-16 15:20:36 -070045{
46 struct symbol *sym;
J.A. Magallon48b9d032005-06-25 14:59:22 -070047 const char *src;
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 static char res_value[SYMBOL_MAXLENGTH];
49 char *dst, name[SYMBOL_MAXLENGTH];
50
51 res_value[0] = 0;
52 dst = name;
53 while ((src = strchr(in, '$'))) {
54 strncat(res_value, in, src - in);
55 src++;
56 dst = name;
57 while (isalnum(*src) || *src == '_')
58 *dst++ = *src++;
59 *dst = 0;
60 sym = sym_lookup(name, 0);
61 sym_calc_value(sym);
62 strcat(res_value, sym_get_string_value(sym));
63 in = src;
64 }
65 strcat(res_value, in);
66
67 return res_value;
68}
69
70char *conf_get_default_confname(void)
71{
72 struct stat buf;
73 static char fullname[PATH_MAX+1];
74 char *env, *name;
75
76 name = conf_expand_value(conf_defname);
77 env = getenv(SRCTREE);
78 if (env) {
79 sprintf(fullname, "%s/%s", env, name);
80 if (!stat(fullname, &buf))
81 return fullname;
82 }
83 return name;
84}
85
Sam Ravnborg9c900a92007-11-10 20:01:56 +010086static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p)
87{
88 char *p2;
89
90 switch (sym->type) {
91 case S_TRISTATE:
92 if (p[0] == 'm') {
93 sym->def[def].tri = mod;
94 sym->flags |= def_flags;
95 break;
96 }
97 case S_BOOLEAN:
98 if (p[0] == 'y') {
99 sym->def[def].tri = yes;
100 sym->flags |= def_flags;
101 break;
102 }
103 if (p[0] == 'n') {
104 sym->def[def].tri = no;
105 sym->flags |= def_flags;
106 break;
107 }
108 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
109 break;
110 case S_OTHER:
111 if (*p != '"') {
112 for (p2 = p; *p2 && !isspace(*p2); p2++)
113 ;
114 sym->type = S_STRING;
115 goto done;
116 }
117 case S_STRING:
118 if (*p++ != '"')
119 break;
120 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
121 if (*p2 == '"') {
122 *p2 = 0;
123 break;
124 }
125 memmove(p2, p2 + 1, strlen(p2));
126 }
127 if (!p2) {
128 conf_warning("invalid string found");
129 return 1;
130 }
131 case S_INT:
132 case S_HEX:
133 done:
134 if (sym_string_valid(sym, p)) {
135 sym->def[def].val = strdup(p);
136 sym->flags |= def_flags;
137 } else {
138 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
139 return 1;
140 }
141 break;
142 default:
143 ;
144 }
145 return 0;
146}
147
Roman Zippel669bfad2006-06-08 22:12:42 -0700148int conf_read_simple(const char *name, int def)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149{
150 FILE *in = NULL;
151 char line[1024];
152 char *p, *p2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700153 struct symbol *sym;
Roman Zippel669bfad2006-06-08 22:12:42 -0700154 int i, def_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700155
156 if (name) {
157 in = zconf_fopen(name);
158 } else {
Roman Zippelface4372006-06-08 22:12:45 -0700159 struct property *prop;
160
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700161 name = conf_get_configname();
Roman Zippelddc97ca2006-06-08 22:12:38 -0700162 in = zconf_fopen(name);
163 if (in)
164 goto load;
Karsten Wiesebfc10002006-12-13 00:34:07 -0800165 sym_add_change_count(1);
Roman Zippelface4372006-06-08 22:12:45 -0700166 if (!sym_defconfig_list)
167 return 1;
168
169 for_all_defaults(sym_defconfig_list, prop) {
170 if (expr_calc_value(prop->visible.expr) == no ||
171 prop->expr->type != E_SYMBOL)
172 continue;
173 name = conf_expand_value(prop->expr->left.sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700174 in = zconf_fopen(name);
175 if (in) {
Arnaldo Carvalho de Melo3b9fa092005-05-05 15:09:46 -0700176 printf(_("#\n"
Roman Zippelddc97ca2006-06-08 22:12:38 -0700177 "# using defaults found in %s\n"
178 "#\n"), name);
179 goto load;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 }
181 }
182 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 if (!in)
184 return 1;
185
Roman Zippelddc97ca2006-06-08 22:12:38 -0700186load:
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800187 conf_filename = name;
188 conf_lineno = 0;
189 conf_warnings = 0;
190 conf_unsaved = 0;
191
Roman Zippel669bfad2006-06-08 22:12:42 -0700192 def_flags = SYMBOL_DEF << def;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193 for_all_symbols(i, sym) {
Roman Zippel669bfad2006-06-08 22:12:42 -0700194 sym->flags |= SYMBOL_CHANGED;
195 sym->flags &= ~(def_flags|SYMBOL_VALID);
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800196 if (sym_is_choice(sym))
Roman Zippel669bfad2006-06-08 22:12:42 -0700197 sym->flags |= def_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700198 switch (sym->type) {
199 case S_INT:
200 case S_HEX:
201 case S_STRING:
Roman Zippel669bfad2006-06-08 22:12:42 -0700202 if (sym->def[def].val)
203 free(sym->def[def].val);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204 default:
Roman Zippel669bfad2006-06-08 22:12:42 -0700205 sym->def[def].val = NULL;
206 sym->def[def].tri = no;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 }
208 }
209
210 while (fgets(line, sizeof(line), in)) {
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800211 conf_lineno++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700212 sym = NULL;
213 switch (line[0]) {
214 case '#':
215 if (memcmp(line + 2, "CONFIG_", 7))
216 continue;
217 p = strchr(line + 9, ' ');
218 if (!p)
219 continue;
220 *p++ = 0;
221 if (strncmp(p, "is not set", 10))
222 continue;
Roman Zippel669bfad2006-06-08 22:12:42 -0700223 if (def == S_DEF_USER) {
224 sym = sym_find(line + 9);
225 if (!sym) {
226 conf_warning("trying to assign nonexistent symbol %s", line + 9);
227 break;
228 }
229 } else {
230 sym = sym_lookup(line + 9, 0);
231 if (sym->type == S_UNKNOWN)
232 sym->type = S_BOOLEAN;
233 }
234 if (sym->flags & def_flags) {
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800235 conf_warning("trying to reassign symbol %s", sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 break;
237 }
238 switch (sym->type) {
239 case S_BOOLEAN:
240 case S_TRISTATE:
Roman Zippel669bfad2006-06-08 22:12:42 -0700241 sym->def[def].tri = no;
242 sym->flags |= def_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 break;
244 default:
245 ;
246 }
247 break;
248 case 'C':
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800249 if (memcmp(line, "CONFIG_", 7)) {
250 conf_warning("unexpected data");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 continue;
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800252 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 p = strchr(line + 7, '=');
254 if (!p)
255 continue;
256 *p++ = 0;
257 p2 = strchr(p, '\n');
Matthew Wilcoxd3660a82006-07-13 12:54:07 -0600258 if (p2) {
259 *p2-- = 0;
260 if (*p2 == '\r')
261 *p2 = 0;
262 }
Roman Zippel669bfad2006-06-08 22:12:42 -0700263 if (def == S_DEF_USER) {
264 sym = sym_find(line + 7);
265 if (!sym) {
266 conf_warning("trying to assign nonexistent symbol %s", line + 7);
267 break;
268 }
269 } else {
270 sym = sym_lookup(line + 7, 0);
271 if (sym->type == S_UNKNOWN)
272 sym->type = S_OTHER;
273 }
274 if (sym->flags & def_flags) {
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800275 conf_warning("trying to reassign symbol %s", sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 break;
277 }
Sam Ravnborg9c900a92007-11-10 20:01:56 +0100278 if (conf_set_sym_val(sym, def, def_flags, p))
279 continue;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280 break;
Matthew Wilcoxd3660a82006-07-13 12:54:07 -0600281 case '\r':
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 case '\n':
283 break;
284 default:
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800285 conf_warning("unexpected data");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 continue;
287 }
288 if (sym && sym_is_choice_value(sym)) {
289 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
Roman Zippel669bfad2006-06-08 22:12:42 -0700290 switch (sym->def[def].tri) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 case no:
292 break;
293 case mod:
Roman Zippel669bfad2006-06-08 22:12:42 -0700294 if (cs->def[def].tri == yes) {
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800295 conf_warning("%s creates inconsistent choice state", sym->name);
Roman Zippel669bfad2006-06-08 22:12:42 -0700296 cs->flags &= ~def_flags;
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800297 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 break;
299 case yes:
Roman Zippel669bfad2006-06-08 22:12:42 -0700300 if (cs->def[def].tri != no) {
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800301 conf_warning("%s creates inconsistent choice state", sym->name);
Roman Zippel669bfad2006-06-08 22:12:42 -0700302 cs->flags &= ~def_flags;
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800303 } else
Roman Zippel669bfad2006-06-08 22:12:42 -0700304 cs->def[def].val = sym;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 break;
306 }
Roman Zippel669bfad2006-06-08 22:12:42 -0700307 cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 }
309 }
310 fclose(in);
311
312 if (modules_sym)
313 sym_calc_value(modules_sym);
Roman Zippel90389162005-11-08 21:34:49 -0800314 return 0;
315}
316
317int conf_read(const char *name)
318{
319 struct symbol *sym;
320 struct property *prop;
321 struct expr *e;
Roman Zippel669bfad2006-06-08 22:12:42 -0700322 int i, flags;
Roman Zippel90389162005-11-08 21:34:49 -0800323
Karsten Wiesebfc10002006-12-13 00:34:07 -0800324 sym_set_change_count(0);
Roman Zippelddc97ca2006-06-08 22:12:38 -0700325
Roman Zippel669bfad2006-06-08 22:12:42 -0700326 if (conf_read_simple(name, S_DEF_USER))
Roman Zippel90389162005-11-08 21:34:49 -0800327 return 1;
328
Linus Torvalds1da177e2005-04-16 15:20:36 -0700329 for_all_symbols(i, sym) {
330 sym_calc_value(sym);
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800331 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
332 goto sym_ok;
333 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
334 /* check that calculated value agrees with saved value */
335 switch (sym->type) {
336 case S_BOOLEAN:
337 case S_TRISTATE:
Roman Zippel0c1822e2006-06-08 22:12:41 -0700338 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800339 break;
340 if (!sym_is_choice(sym))
341 goto sym_ok;
342 default:
Roman Zippel0c1822e2006-06-08 22:12:41 -0700343 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
Roman Zippelc1a0f5e2005-11-08 21:34:54 -0800344 goto sym_ok;
345 break;
346 }
347 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
348 /* no previous value and not saved */
349 goto sym_ok;
350 conf_unsaved++;
351 /* maybe print value in verbose mode... */
352 sym_ok:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353 if (!sym_is_choice(sym))
354 continue;
Roman Zippeld8982ba2007-07-09 11:43:58 -0700355 /* The choice symbol only has a set value (and thus is not new)
356 * if all its visible childs have values.
357 */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700358 prop = sym_get_choice_prop(sym);
Roman Zippel669bfad2006-06-08 22:12:42 -0700359 flags = sym->flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 for (e = prop->expr; e; e = e->left.expr)
361 if (e->right.sym->visible != no)
Roman Zippel669bfad2006-06-08 22:12:42 -0700362 flags &= e->right.sym->flags;
Roman Zippel002d27b2006-07-13 13:22:38 +0200363 sym->flags &= flags | ~SYMBOL_DEF_USER;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 }
365
Roman Zippeld8982ba2007-07-09 11:43:58 -0700366 for_all_symbols(i, sym) {
367 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
368 /* Reset values of generates values, so they'll appear
369 * as new, if they should become visible, but that
370 * doesn't quite work if the Kconfig and the saved
371 * configuration disagree.
372 */
373 if (sym->visible == no && !conf_unsaved)
374 sym->flags &= ~SYMBOL_DEF_USER;
375 switch (sym->type) {
376 case S_STRING:
377 case S_INT:
378 case S_HEX:
379 /* Reset a string value if it's out of range */
380 if (sym_string_within_range(sym, sym->def[S_DEF_USER].val))
381 break;
382 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
383 conf_unsaved++;
384 break;
385 default:
386 break;
387 }
388 }
389 }
390
Karsten Wiesebfc10002006-12-13 00:34:07 -0800391 sym_add_change_count(conf_warnings || conf_unsaved);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
393 return 0;
394}
395
396int conf_write(const char *name)
397{
Roman Zippelc955cca2006-06-08 22:12:39 -0700398 FILE *out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 struct symbol *sym;
400 struct menu *menu;
401 const char *basename;
402 char dirname[128], tmpname[128], newname[128];
403 int type, l;
404 const char *str;
405 time_t now;
406 int use_timestamp = 1;
407 char *env;
408
409 dirname[0] = 0;
410 if (name && name[0]) {
411 struct stat st;
412 char *slash;
413
414 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
415 strcpy(dirname, name);
416 strcat(dirname, "/");
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700417 basename = conf_get_configname();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 } else if ((slash = strrchr(name, '/'))) {
419 int size = slash - name + 1;
420 memcpy(dirname, name, size);
421 dirname[size] = 0;
422 if (slash[1])
423 basename = slash + 1;
424 else
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700425 basename = conf_get_configname();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 } else
427 basename = name;
428 } else
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700429 basename = conf_get_configname();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700431 sprintf(newname, "%s%s", dirname, basename);
432 env = getenv("KCONFIG_OVERWRITECONFIG");
433 if (!env || !*env) {
434 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
435 out = fopen(tmpname, "w");
436 } else {
437 *tmpname = 0;
438 out = fopen(newname, "w");
439 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440 if (!out)
441 return 1;
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700442
Sam Ravnborg2244cbd2006-01-16 12:12:12 +0100443 sym = sym_lookup("KERNELVERSION", 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 sym_calc_value(sym);
445 time(&now);
446 env = getenv("KCONFIG_NOTIMESTAMP");
447 if (env && *env)
448 use_timestamp = 0;
449
Arnaldo Carvalho de Melo3b9fa092005-05-05 15:09:46 -0700450 fprintf(out, _("#\n"
451 "# Automatically generated make config: don't edit\n"
452 "# Linux kernel version: %s\n"
453 "%s%s"
454 "#\n"),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 sym_get_string_value(sym),
456 use_timestamp ? "# " : "",
457 use_timestamp ? ctime(&now) : "");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458
Karsten Wieseb3214292006-12-13 00:34:06 -0800459 if (!conf_get_changed())
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 sym_clear_all_valid();
461
462 menu = rootmenu.list;
463 while (menu) {
464 sym = menu->sym;
465 if (!sym) {
466 if (!menu_is_visible(menu))
467 goto next;
468 str = menu_get_prompt(menu);
469 fprintf(out, "\n"
470 "#\n"
471 "# %s\n"
472 "#\n", str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473 } else if (!(sym->flags & SYMBOL_CHOICE)) {
474 sym_calc_value(sym);
475 if (!(sym->flags & SYMBOL_WRITE))
476 goto next;
477 sym->flags &= ~SYMBOL_WRITE;
478 type = sym->type;
479 if (type == S_TRISTATE) {
480 sym_calc_value(modules_sym);
481 if (modules_sym->curr.tri == no)
482 type = S_BOOLEAN;
483 }
484 switch (type) {
485 case S_BOOLEAN:
486 case S_TRISTATE:
487 switch (sym_get_tristate_value(sym)) {
488 case no:
489 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490 break;
491 case mod:
492 fprintf(out, "CONFIG_%s=m\n", sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700493 break;
494 case yes:
495 fprintf(out, "CONFIG_%s=y\n", sym->name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 break;
497 }
498 break;
499 case S_STRING:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700500 str = sym_get_string_value(sym);
501 fprintf(out, "CONFIG_%s=\"", sym->name);
Roman Zippelc955cca2006-06-08 22:12:39 -0700502 while (1) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 l = strcspn(str, "\"\\");
504 if (l) {
505 fwrite(str, l, 1, out);
Roman Zippelc955cca2006-06-08 22:12:39 -0700506 str += l;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700507 }
Roman Zippelc955cca2006-06-08 22:12:39 -0700508 if (!*str)
509 break;
510 fprintf(out, "\\%c", *str++);
511 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700512 fputs("\"\n", out);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 break;
514 case S_HEX:
515 str = sym_get_string_value(sym);
516 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
517 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518 break;
519 }
520 case S_INT:
521 str = sym_get_string_value(sym);
522 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 break;
524 }
525 }
526
527 next:
528 if (menu->list) {
529 menu = menu->list;
530 continue;
531 }
532 if (menu->next)
533 menu = menu->next;
534 else while ((menu = menu->parent)) {
535 if (menu->next) {
536 menu = menu->next;
537 break;
538 }
539 }
540 }
541 fclose(out);
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700542
543 if (*tmpname) {
Sam Ravnborg9a3d0fe2006-10-01 11:48:53 +0200544 strcat(dirname, basename);
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700545 strcat(dirname, ".old");
546 rename(newname, dirname);
547 if (rename(tmpname, newname))
548 return 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550
Roman Zippelddc97ca2006-06-08 22:12:38 -0700551 printf(_("#\n"
552 "# configuration written to %s\n"
Roman Zippel14cdd3c2006-06-08 22:12:51 -0700553 "#\n"), newname);
Roman Zippelddc97ca2006-06-08 22:12:38 -0700554
Karsten Wiesebfc10002006-12-13 00:34:07 -0800555 sym_set_change_count(0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700556
557 return 0;
558}
Roman Zippelc955cca2006-06-08 22:12:39 -0700559
Roman Zippel2e3646e2006-06-08 22:12:42 -0700560int conf_split_config(void)
561{
562 char *name, path[128];
563 char *s, *d, c;
564 struct symbol *sym;
565 struct stat sb;
566 int res, i, fd;
567
568 name = getenv("KCONFIG_AUTOCONFIG");
569 if (!name)
570 name = "include/config/auto.conf";
571 conf_read_simple(name, S_DEF_AUTO);
572
573 if (chdir("include/config"))
574 return 1;
575
576 res = 0;
577 for_all_symbols(i, sym) {
578 sym_calc_value(sym);
579 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
580 continue;
581 if (sym->flags & SYMBOL_WRITE) {
582 if (sym->flags & SYMBOL_DEF_AUTO) {
583 /*
584 * symbol has old and new value,
585 * so compare them...
586 */
587 switch (sym->type) {
588 case S_BOOLEAN:
589 case S_TRISTATE:
590 if (sym_get_tristate_value(sym) ==
591 sym->def[S_DEF_AUTO].tri)
592 continue;
593 break;
594 case S_STRING:
595 case S_HEX:
596 case S_INT:
597 if (!strcmp(sym_get_string_value(sym),
598 sym->def[S_DEF_AUTO].val))
599 continue;
600 break;
601 default:
602 break;
603 }
604 } else {
605 /*
606 * If there is no old value, only 'no' (unset)
607 * is allowed as new value.
608 */
609 switch (sym->type) {
610 case S_BOOLEAN:
611 case S_TRISTATE:
612 if (sym_get_tristate_value(sym) == no)
613 continue;
614 break;
615 default:
616 break;
617 }
618 }
619 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
620 /* There is neither an old nor a new value. */
621 continue;
622 /* else
623 * There is an old value, but no new value ('no' (unset)
624 * isn't saved in auto.conf, so the old value is always
625 * different from 'no').
626 */
627
628 /* Replace all '_' and append ".h" */
629 s = sym->name;
630 d = path;
631 while ((c = *s++)) {
632 c = tolower(c);
633 *d++ = (c == '_') ? '/' : c;
634 }
635 strcpy(d, ".h");
636
637 /* Assume directory path already exists. */
638 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
639 if (fd == -1) {
640 if (errno != ENOENT) {
641 res = 1;
642 break;
643 }
644 /*
645 * Create directory components,
646 * unless they exist already.
647 */
648 d = path;
649 while ((d = strchr(d, '/'))) {
650 *d = 0;
651 if (stat(path, &sb) && mkdir(path, 0755)) {
652 res = 1;
653 goto out;
654 }
655 *d++ = '/';
656 }
657 /* Try it again. */
658 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
659 if (fd == -1) {
660 res = 1;
661 break;
662 }
663 }
664 close(fd);
665 }
666out:
667 if (chdir("../.."))
668 return 1;
669
670 return res;
671}
672
Roman Zippelc955cca2006-06-08 22:12:39 -0700673int conf_write_autoconf(void)
674{
675 struct symbol *sym;
676 const char *str;
677 char *name;
678 FILE *out, *out_h;
679 time_t now;
680 int i, l;
681
Roman Zippel2e3646e2006-06-08 22:12:42 -0700682 sym_clear_all_valid();
683
Roman Zippelc955cca2006-06-08 22:12:39 -0700684 file_write_dep("include/config/auto.conf.cmd");
685
Roman Zippel2e3646e2006-06-08 22:12:42 -0700686 if (conf_split_config())
687 return 1;
688
Roman Zippelc955cca2006-06-08 22:12:39 -0700689 out = fopen(".tmpconfig", "w");
690 if (!out)
691 return 1;
692
693 out_h = fopen(".tmpconfig.h", "w");
694 if (!out_h) {
695 fclose(out);
696 return 1;
697 }
698
699 sym = sym_lookup("KERNELVERSION", 0);
700 sym_calc_value(sym);
701 time(&now);
702 fprintf(out, "#\n"
703 "# Automatically generated make config: don't edit\n"
704 "# Linux kernel version: %s\n"
705 "# %s"
706 "#\n",
707 sym_get_string_value(sym), ctime(&now));
708 fprintf(out_h, "/*\n"
709 " * Automatically generated C config: don't edit\n"
710 " * Linux kernel version: %s\n"
711 " * %s"
712 " */\n"
713 "#define AUTOCONF_INCLUDED\n",
714 sym_get_string_value(sym), ctime(&now));
715
Roman Zippelc955cca2006-06-08 22:12:39 -0700716 for_all_symbols(i, sym) {
717 sym_calc_value(sym);
718 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
719 continue;
720 switch (sym->type) {
721 case S_BOOLEAN:
722 case S_TRISTATE:
723 switch (sym_get_tristate_value(sym)) {
724 case no:
725 break;
726 case mod:
727 fprintf(out, "CONFIG_%s=m\n", sym->name);
728 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
729 break;
730 case yes:
731 fprintf(out, "CONFIG_%s=y\n", sym->name);
732 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
733 break;
734 }
735 break;
736 case S_STRING:
737 str = sym_get_string_value(sym);
738 fprintf(out, "CONFIG_%s=\"", sym->name);
739 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
740 while (1) {
741 l = strcspn(str, "\"\\");
742 if (l) {
743 fwrite(str, l, 1, out);
744 fwrite(str, l, 1, out_h);
745 str += l;
746 }
747 if (!*str)
748 break;
749 fprintf(out, "\\%c", *str);
750 fprintf(out_h, "\\%c", *str);
751 str++;
752 }
753 fputs("\"\n", out);
754 fputs("\"\n", out_h);
755 break;
756 case S_HEX:
757 str = sym_get_string_value(sym);
758 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
759 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
760 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
761 break;
762 }
763 case S_INT:
764 str = sym_get_string_value(sym);
765 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
766 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
767 break;
768 default:
769 break;
770 }
771 }
772 fclose(out);
773 fclose(out_h);
774
775 name = getenv("KCONFIG_AUTOHEADER");
776 if (!name)
777 name = "include/linux/autoconf.h";
778 if (rename(".tmpconfig.h", name))
779 return 1;
780 name = getenv("KCONFIG_AUTOCONFIG");
781 if (!name)
782 name = "include/config/auto.conf";
783 /*
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}