aboutsummaryrefslogtreecommitdiffstats
path: root/scripts/kconfig/confdata.c
diff options
context:
space:
mode:
Diffstat (limited to 'scripts/kconfig/confdata.c')
-rw-r--r--scripts/kconfig/confdata.c491
1 files changed, 362 insertions, 129 deletions
diff --git a/scripts/kconfig/confdata.c b/scripts/kconfig/confdata.c
index 1b5df589f3ae..2ee48c377b66 100644
--- a/scripts/kconfig/confdata.c
+++ b/scripts/kconfig/confdata.c
@@ -5,6 +5,7 @@
5 5
6#include <sys/stat.h> 6#include <sys/stat.h>
7#include <ctype.h> 7#include <ctype.h>
8#include <fcntl.h>
8#include <stdio.h> 9#include <stdio.h>
9#include <stdlib.h> 10#include <stdlib.h>
10#include <string.h> 11#include <string.h>
@@ -20,19 +21,8 @@ static void conf_warning(const char *fmt, ...)
20static const char *conf_filename; 21static const char *conf_filename;
21static int conf_lineno, conf_warnings, conf_unsaved; 22static int conf_lineno, conf_warnings, conf_unsaved;
22 23
23const char conf_def_filename[] = ".config";
24
25const char conf_defname[] = "arch/$ARCH/defconfig"; 24const char conf_defname[] = "arch/$ARCH/defconfig";
26 25
27const char *conf_confnames[] = {
28 ".config",
29 "/lib/modules/$UNAME_RELEASE/.config",
30 "/etc/kernel-config",
31 "/boot/config-$UNAME_RELEASE",
32 conf_defname,
33 NULL,
34};
35
36static void conf_warning(const char *fmt, ...) 26static void conf_warning(const char *fmt, ...)
37{ 27{
38 va_list ap; 28 va_list ap;
@@ -44,6 +34,13 @@ static void conf_warning(const char *fmt, ...)
44 conf_warnings++; 34 conf_warnings++;
45} 35}
46 36
37const char *conf_get_configname(void)
38{
39 char *name = getenv("KCONFIG_CONFIG");
40
41 return name ? name : ".config";
42}
43
47static char *conf_expand_value(const char *in) 44static char *conf_expand_value(const char *in)
48{ 45{
49 struct symbol *sym; 46 struct symbol *sym;
@@ -86,51 +83,65 @@ char *conf_get_default_confname(void)
86 return name; 83 return name;
87} 84}
88 85
89int conf_read_simple(const char *name) 86int conf_read_simple(const char *name, int def)
90{ 87{
91 FILE *in = NULL; 88 FILE *in = NULL;
92 char line[1024]; 89 char line[1024];
93 char *p, *p2; 90 char *p, *p2;
94 struct symbol *sym; 91 struct symbol *sym;
95 int i; 92 int i, def_flags;
96 93
97 if (name) { 94 if (name) {
98 in = zconf_fopen(name); 95 in = zconf_fopen(name);
99 } else { 96 } else {
100 const char **names = conf_confnames; 97 struct property *prop;
101 while ((name = *names++)) { 98
102 name = conf_expand_value(name); 99 name = conf_get_configname();
100 in = zconf_fopen(name);
101 if (in)
102 goto load;
103 sym_change_count++;
104 if (!sym_defconfig_list)
105 return 1;
106
107 for_all_defaults(sym_defconfig_list, prop) {
108 if (expr_calc_value(prop->visible.expr) == no ||
109 prop->expr->type != E_SYMBOL)
110 continue;
111 name = conf_expand_value(prop->expr->left.sym->name);
103 in = zconf_fopen(name); 112 in = zconf_fopen(name);
104 if (in) { 113 if (in) {
105 printf(_("#\n" 114 printf(_("#\n"
106 "# using defaults found in %s\n" 115 "# using defaults found in %s\n"
107 "#\n"), name); 116 "#\n"), name);
108 break; 117 goto load;
109 } 118 }
110 } 119 }
111 } 120 }
112 if (!in) 121 if (!in)
113 return 1; 122 return 1;
114 123
124load:
115 conf_filename = name; 125 conf_filename = name;
116 conf_lineno = 0; 126 conf_lineno = 0;
117 conf_warnings = 0; 127 conf_warnings = 0;
118 conf_unsaved = 0; 128 conf_unsaved = 0;
119 129
130 def_flags = SYMBOL_DEF << def;
120 for_all_symbols(i, sym) { 131 for_all_symbols(i, sym) {
121 sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED; 132 sym->flags |= SYMBOL_CHANGED;
133 sym->flags &= ~(def_flags|SYMBOL_VALID);
122 if (sym_is_choice(sym)) 134 if (sym_is_choice(sym))
123 sym->flags &= ~SYMBOL_NEW; 135 sym->flags |= def_flags;
124 sym->flags &= ~SYMBOL_VALID;
125 switch (sym->type) { 136 switch (sym->type) {
126 case S_INT: 137 case S_INT:
127 case S_HEX: 138 case S_HEX:
128 case S_STRING: 139 case S_STRING:
129 if (sym->user.val) 140 if (sym->def[def].val)
130 free(sym->user.val); 141 free(sym->def[def].val);
131 default: 142 default:
132 sym->user.val = NULL; 143 sym->def[def].val = NULL;
133 sym->user.tri = no; 144 sym->def[def].tri = no;
134 } 145 }
135 } 146 }
136 147
@@ -147,19 +158,26 @@ int conf_read_simple(const char *name)
147 *p++ = 0; 158 *p++ = 0;
148 if (strncmp(p, "is not set", 10)) 159 if (strncmp(p, "is not set", 10))
149 continue; 160 continue;
150 sym = sym_find(line + 9); 161 if (def == S_DEF_USER) {
151 if (!sym) { 162 sym = sym_find(line + 9);
152 conf_warning("trying to assign nonexistent symbol %s", line + 9); 163 if (!sym) {
153 break; 164 conf_warning("trying to assign nonexistent symbol %s", line + 9);
154 } else if (!(sym->flags & SYMBOL_NEW)) { 165 break;
166 }
167 } else {
168 sym = sym_lookup(line + 9, 0);
169 if (sym->type == S_UNKNOWN)
170 sym->type = S_BOOLEAN;
171 }
172 if (sym->flags & def_flags) {
155 conf_warning("trying to reassign symbol %s", sym->name); 173 conf_warning("trying to reassign symbol %s", sym->name);
156 break; 174 break;
157 } 175 }
158 switch (sym->type) { 176 switch (sym->type) {
159 case S_BOOLEAN: 177 case S_BOOLEAN:
160 case S_TRISTATE: 178 case S_TRISTATE:
161 sym->user.tri = no; 179 sym->def[def].tri = no;
162 sym->flags &= ~SYMBOL_NEW; 180 sym->flags |= def_flags;
163 break; 181 break;
164 default: 182 default:
165 ; 183 ;
@@ -177,34 +195,48 @@ int conf_read_simple(const char *name)
177 p2 = strchr(p, '\n'); 195 p2 = strchr(p, '\n');
178 if (p2) 196 if (p2)
179 *p2 = 0; 197 *p2 = 0;
180 sym = sym_find(line + 7); 198 if (def == S_DEF_USER) {
181 if (!sym) { 199 sym = sym_find(line + 7);
182 conf_warning("trying to assign nonexistent symbol %s", line + 7); 200 if (!sym) {
183 break; 201 conf_warning("trying to assign nonexistent symbol %s", line + 7);
184 } else if (!(sym->flags & SYMBOL_NEW)) { 202 break;
203 }
204 } else {
205 sym = sym_lookup(line + 7, 0);
206 if (sym->type == S_UNKNOWN)
207 sym->type = S_OTHER;
208 }
209 if (sym->flags & def_flags) {
185 conf_warning("trying to reassign symbol %s", sym->name); 210 conf_warning("trying to reassign symbol %s", sym->name);
186 break; 211 break;
187 } 212 }
188 switch (sym->type) { 213 switch (sym->type) {
189 case S_TRISTATE: 214 case S_TRISTATE:
190 if (p[0] == 'm') { 215 if (p[0] == 'm') {
191 sym->user.tri = mod; 216 sym->def[def].tri = mod;
192 sym->flags &= ~SYMBOL_NEW; 217 sym->flags |= def_flags;
193 break; 218 break;
194 } 219 }
195 case S_BOOLEAN: 220 case S_BOOLEAN:
196 if (p[0] == 'y') { 221 if (p[0] == 'y') {
197 sym->user.tri = yes; 222 sym->def[def].tri = yes;
198 sym->flags &= ~SYMBOL_NEW; 223 sym->flags |= def_flags;
199 break; 224 break;
200 } 225 }
201 if (p[0] == 'n') { 226 if (p[0] == 'n') {
202 sym->user.tri = no; 227 sym->def[def].tri = no;
203 sym->flags &= ~SYMBOL_NEW; 228 sym->flags |= def_flags;
204 break; 229 break;
205 } 230 }
206 conf_warning("symbol value '%s' invalid for %s", p, sym->name); 231 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
207 break; 232 break;
233 case S_OTHER:
234 if (*p != '"') {
235 for (p2 = p; *p2 && !isspace(*p2); p2++)
236 ;
237 sym->type = S_STRING;
238 goto done;
239 }
208 case S_STRING: 240 case S_STRING:
209 if (*p++ != '"') 241 if (*p++ != '"')
210 break; 242 break;
@@ -221,9 +253,10 @@ int conf_read_simple(const char *name)
221 } 253 }
222 case S_INT: 254 case S_INT:
223 case S_HEX: 255 case S_HEX:
256 done:
224 if (sym_string_valid(sym, p)) { 257 if (sym_string_valid(sym, p)) {
225 sym->user.val = strdup(p); 258 sym->def[def].val = strdup(p);
226 sym->flags &= ~SYMBOL_NEW; 259 sym->flags |= def_flags;
227 } else { 260 } else {
228 conf_warning("symbol value '%s' invalid for %s", p, sym->name); 261 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
229 continue; 262 continue;
@@ -241,24 +274,24 @@ int conf_read_simple(const char *name)
241 } 274 }
242 if (sym && sym_is_choice_value(sym)) { 275 if (sym && sym_is_choice_value(sym)) {
243 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); 276 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
244 switch (sym->user.tri) { 277 switch (sym->def[def].tri) {
245 case no: 278 case no:
246 break; 279 break;
247 case mod: 280 case mod:
248 if (cs->user.tri == yes) { 281 if (cs->def[def].tri == yes) {
249 conf_warning("%s creates inconsistent choice state", sym->name); 282 conf_warning("%s creates inconsistent choice state", sym->name);
250 cs->flags |= SYMBOL_NEW; 283 cs->flags &= ~def_flags;
251 } 284 }
252 break; 285 break;
253 case yes: 286 case yes:
254 if (cs->user.tri != no) { 287 if (cs->def[def].tri != no) {
255 conf_warning("%s creates inconsistent choice state", sym->name); 288 conf_warning("%s creates inconsistent choice state", sym->name);
256 cs->flags |= SYMBOL_NEW; 289 cs->flags &= ~def_flags;
257 } else 290 } else
258 cs->user.val = sym; 291 cs->def[def].val = sym;
259 break; 292 break;
260 } 293 }
261 cs->user.tri = E_OR(cs->user.tri, sym->user.tri); 294 cs->def[def].tri = E_OR(cs->def[def].tri, sym->def[def].tri);
262 } 295 }
263 } 296 }
264 fclose(in); 297 fclose(in);
@@ -273,9 +306,11 @@ int conf_read(const char *name)
273 struct symbol *sym; 306 struct symbol *sym;
274 struct property *prop; 307 struct property *prop;
275 struct expr *e; 308 struct expr *e;
276 int i; 309 int i, flags;
310
311 sym_change_count = 0;
277 312
278 if (conf_read_simple(name)) 313 if (conf_read_simple(name, S_DEF_USER))
279 return 1; 314 return 1;
280 315
281 for_all_symbols(i, sym) { 316 for_all_symbols(i, sym) {
@@ -287,12 +322,12 @@ int conf_read(const char *name)
287 switch (sym->type) { 322 switch (sym->type) {
288 case S_BOOLEAN: 323 case S_BOOLEAN:
289 case S_TRISTATE: 324 case S_TRISTATE:
290 if (sym->user.tri != sym_get_tristate_value(sym)) 325 if (sym->def[S_DEF_USER].tri != sym_get_tristate_value(sym))
291 break; 326 break;
292 if (!sym_is_choice(sym)) 327 if (!sym_is_choice(sym))
293 goto sym_ok; 328 goto sym_ok;
294 default: 329 default:
295 if (!strcmp(sym->curr.val, sym->user.val)) 330 if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val))
296 goto sym_ok; 331 goto sym_ok;
297 break; 332 break;
298 } 333 }
@@ -304,15 +339,13 @@ int conf_read(const char *name)
304 sym_ok: 339 sym_ok:
305 if (sym_has_value(sym) && !sym_is_choice_value(sym)) { 340 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
306 if (sym->visible == no) 341 if (sym->visible == no)
307 sym->flags |= SYMBOL_NEW; 342 sym->flags &= ~SYMBOL_DEF_USER;
308 switch (sym->type) { 343 switch (sym->type) {
309 case S_STRING: 344 case S_STRING:
310 case S_INT: 345 case S_INT:
311 case S_HEX: 346 case S_HEX:
312 if (!sym_string_within_range(sym, sym->user.val)) { 347 if (!sym_string_within_range(sym, sym->def[S_DEF_USER].val))
313 sym->flags |= SYMBOL_NEW; 348 sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER);
314 sym->flags &= ~SYMBOL_VALID;
315 }
316 default: 349 default:
317 break; 350 break;
318 } 351 }
@@ -320,19 +353,21 @@ int conf_read(const char *name)
320 if (!sym_is_choice(sym)) 353 if (!sym_is_choice(sym))
321 continue; 354 continue;
322 prop = sym_get_choice_prop(sym); 355 prop = sym_get_choice_prop(sym);
356 flags = sym->flags;
323 for (e = prop->expr; e; e = e->left.expr) 357 for (e = prop->expr; e; e = e->left.expr)
324 if (e->right.sym->visible != no) 358 if (e->right.sym->visible != no)
325 sym->flags |= e->right.sym->flags & SYMBOL_NEW; 359 flags &= e->right.sym->flags;
360 sym->flags |= flags & SYMBOL_DEF_USER;
326 } 361 }
327 362
328 sym_change_count = conf_warnings || conf_unsaved; 363 sym_change_count += conf_warnings || conf_unsaved;
329 364
330 return 0; 365 return 0;
331} 366}
332 367
333int conf_write(const char *name) 368int conf_write(const char *name)
334{ 369{
335 FILE *out, *out_h; 370 FILE *out;
336 struct symbol *sym; 371 struct symbol *sym;
337 struct menu *menu; 372 struct menu *menu;
338 const char *basename; 373 const char *basename;
@@ -351,7 +386,7 @@ int conf_write(const char *name)
351 if (!stat(name, &st) && S_ISDIR(st.st_mode)) { 386 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
352 strcpy(dirname, name); 387 strcpy(dirname, name);
353 strcat(dirname, "/"); 388 strcat(dirname, "/");
354 basename = conf_def_filename; 389 basename = conf_get_configname();
355 } else if ((slash = strrchr(name, '/'))) { 390 } else if ((slash = strrchr(name, '/'))) {
356 int size = slash - name + 1; 391 int size = slash - name + 1;
357 memcpy(dirname, name, size); 392 memcpy(dirname, name, size);
@@ -359,23 +394,24 @@ int conf_write(const char *name)
359 if (slash[1]) 394 if (slash[1])
360 basename = slash + 1; 395 basename = slash + 1;
361 else 396 else
362 basename = conf_def_filename; 397 basename = conf_get_configname();
363 } else 398 } else
364 basename = name; 399 basename = name;
365 } else 400 } else
366 basename = conf_def_filename; 401 basename = conf_get_configname();
367 402
368 sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid()); 403 sprintf(newname, "%s%s", dirname, basename);
369 out = fopen(newname, "w"); 404 env = getenv("KCONFIG_OVERWRITECONFIG");
405 if (!env || !*env) {
406 sprintf(tmpname, "%s.tmpconfig.%d", dirname, (int)getpid());
407 out = fopen(tmpname, "w");
408 } else {
409 *tmpname = 0;
410 out = fopen(newname, "w");
411 }
370 if (!out) 412 if (!out)
371 return 1; 413 return 1;
372 out_h = NULL; 414
373 if (!name) {
374 out_h = fopen(".tmpconfig.h", "w");
375 if (!out_h)
376 return 1;
377 file_write_dep(NULL);
378 }
379 sym = sym_lookup("KERNELVERSION", 0); 415 sym = sym_lookup("KERNELVERSION", 0);
380 sym_calc_value(sym); 416 sym_calc_value(sym);
381 time(&now); 417 time(&now);
@@ -391,16 +427,6 @@ int conf_write(const char *name)
391 sym_get_string_value(sym), 427 sym_get_string_value(sym),
392 use_timestamp ? "# " : "", 428 use_timestamp ? "# " : "",
393 use_timestamp ? ctime(&now) : ""); 429 use_timestamp ? ctime(&now) : "");
394 if (out_h)
395 fprintf(out_h, "/*\n"
396 " * Automatically generated C config: don't edit\n"
397 " * Linux kernel version: %s\n"
398 "%s%s"
399 " */\n"
400 "#define AUTOCONF_INCLUDED\n",
401 sym_get_string_value(sym),
402 use_timestamp ? " * " : "",
403 use_timestamp ? ctime(&now) : "");
404 430
405 if (!sym_change_count) 431 if (!sym_change_count)
406 sym_clear_all_valid(); 432 sym_clear_all_valid();
@@ -416,11 +442,6 @@ int conf_write(const char *name)
416 "#\n" 442 "#\n"
417 "# %s\n" 443 "# %s\n"
418 "#\n", str); 444 "#\n", str);
419 if (out_h)
420 fprintf(out_h, "\n"
421 "/*\n"
422 " * %s\n"
423 " */\n", str);
424 } else if (!(sym->flags & SYMBOL_CHOICE)) { 445 } else if (!(sym->flags & SYMBOL_CHOICE)) {
425 sym_calc_value(sym); 446 sym_calc_value(sym);
426 if (!(sym->flags & SYMBOL_WRITE)) 447 if (!(sym->flags & SYMBOL_WRITE))
@@ -438,59 +459,39 @@ int conf_write(const char *name)
438 switch (sym_get_tristate_value(sym)) { 459 switch (sym_get_tristate_value(sym)) {
439 case no: 460 case no:
440 fprintf(out, "# CONFIG_%s is not set\n", sym->name); 461 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
441 if (out_h)
442 fprintf(out_h, "#undef CONFIG_%s\n", sym->name);
443 break; 462 break;
444 case mod: 463 case mod:
445 fprintf(out, "CONFIG_%s=m\n", sym->name); 464 fprintf(out, "CONFIG_%s=m\n", sym->name);
446 if (out_h)
447 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
448 break; 465 break;
449 case yes: 466 case yes:
450 fprintf(out, "CONFIG_%s=y\n", sym->name); 467 fprintf(out, "CONFIG_%s=y\n", sym->name);
451 if (out_h)
452 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
453 break; 468 break;
454 } 469 }
455 break; 470 break;
456 case S_STRING: 471 case S_STRING:
457 // fix me
458 str = sym_get_string_value(sym); 472 str = sym_get_string_value(sym);
459 fprintf(out, "CONFIG_%s=\"", sym->name); 473 fprintf(out, "CONFIG_%s=\"", sym->name);
460 if (out_h) 474 while (1) {
461 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
462 do {
463 l = strcspn(str, "\"\\"); 475 l = strcspn(str, "\"\\");
464 if (l) { 476 if (l) {
465 fwrite(str, l, 1, out); 477 fwrite(str, l, 1, out);
466 if (out_h) 478 str += l;
467 fwrite(str, l, 1, out_h);
468 }
469 str += l;
470 while (*str == '\\' || *str == '"') {
471 fprintf(out, "\\%c", *str);
472 if (out_h)
473 fprintf(out_h, "\\%c", *str);
474 str++;
475 } 479 }
476 } while (*str); 480 if (!*str)
481 break;
482 fprintf(out, "\\%c", *str++);
483 }
477 fputs("\"\n", out); 484 fputs("\"\n", out);
478 if (out_h)
479 fputs("\"\n", out_h);
480 break; 485 break;
481 case S_HEX: 486 case S_HEX:
482 str = sym_get_string_value(sym); 487 str = sym_get_string_value(sym);
483 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) { 488 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
484 fprintf(out, "CONFIG_%s=%s\n", sym->name, str); 489 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
485 if (out_h)
486 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
487 break; 490 break;
488 } 491 }
489 case S_INT: 492 case S_INT:
490 str = sym_get_string_value(sym); 493 str = sym_get_string_value(sym);
491 fprintf(out, "CONFIG_%s=%s\n", sym->name, str); 494 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
492 if (out_h)
493 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
494 break; 495 break;
495 } 496 }
496 } 497 }
@@ -510,21 +511,253 @@ int conf_write(const char *name)
510 } 511 }
511 } 512 }
512 fclose(out); 513 fclose(out);
513 if (out_h) { 514
514 fclose(out_h); 515 if (*tmpname) {
515 rename(".tmpconfig.h", "include/linux/autoconf.h"); 516 strcat(dirname, name ? name : conf_get_configname());
517 strcat(dirname, ".old");
518 rename(newname, dirname);
519 if (rename(tmpname, newname))
520 return 1;
516 } 521 }
517 if (!name || basename != conf_def_filename) { 522
518 if (!name) 523 printf(_("#\n"
519 name = conf_def_filename; 524 "# configuration written to %s\n"
520 sprintf(tmpname, "%s.old", name); 525 "#\n"), newname);
521 rename(name, tmpname); 526
527 sym_change_count = 0;
528
529 return 0;
530}
531
532int conf_split_config(void)
533{
534 char *name, path[128];
535 char *s, *d, c;
536 struct symbol *sym;
537 struct stat sb;
538 int res, i, fd;
539
540 name = getenv("KCONFIG_AUTOCONFIG");
541 if (!name)
542 name = "include/config/auto.conf";
543 conf_read_simple(name, S_DEF_AUTO);
544
545 if (chdir("include/config"))
546 return 1;
547
548 res = 0;
549 for_all_symbols(i, sym) {
550 sym_calc_value(sym);
551 if ((sym->flags & SYMBOL_AUTO) || !sym->name)
552 continue;
553 if (sym->flags & SYMBOL_WRITE) {
554 if (sym->flags & SYMBOL_DEF_AUTO) {
555 /*
556 * symbol has old and new value,
557 * so compare them...
558 */
559 switch (sym->type) {
560 case S_BOOLEAN:
561 case S_TRISTATE:
562 if (sym_get_tristate_value(sym) ==
563 sym->def[S_DEF_AUTO].tri)
564 continue;
565 break;
566 case S_STRING:
567 case S_HEX:
568 case S_INT:
569 if (!strcmp(sym_get_string_value(sym),
570 sym->def[S_DEF_AUTO].val))
571 continue;
572 break;
573 default:
574 break;
575 }
576 } else {
577 /*
578 * If there is no old value, only 'no' (unset)
579 * is allowed as new value.
580 */
581 switch (sym->type) {
582 case S_BOOLEAN:
583 case S_TRISTATE:
584 if (sym_get_tristate_value(sym) == no)
585 continue;
586 break;
587 default:
588 break;
589 }
590 }
591 } else if (!(sym->flags & SYMBOL_DEF_AUTO))
592 /* There is neither an old nor a new value. */
593 continue;
594 /* else
595 * There is an old value, but no new value ('no' (unset)
596 * isn't saved in auto.conf, so the old value is always
597 * different from 'no').
598 */
599
600 /* Replace all '_' and append ".h" */
601 s = sym->name;
602 d = path;
603 while ((c = *s++)) {
604 c = tolower(c);
605 *d++ = (c == '_') ? '/' : c;
606 }
607 strcpy(d, ".h");
608
609 /* Assume directory path already exists. */
610 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
611 if (fd == -1) {
612 if (errno != ENOENT) {
613 res = 1;
614 break;
615 }
616 /*
617 * Create directory components,
618 * unless they exist already.
619 */
620 d = path;
621 while ((d = strchr(d, '/'))) {
622 *d = 0;
623 if (stat(path, &sb) && mkdir(path, 0755)) {
624 res = 1;
625 goto out;
626 }
627 *d++ = '/';
628 }
629 /* Try it again. */
630 fd = open(path, O_WRONLY | O_CREAT | O_TRUNC, 0644);
631 if (fd == -1) {
632 res = 1;
633 break;
634 }
635 }
636 close(fd);
522 } 637 }
523 sprintf(tmpname, "%s%s", dirname, basename); 638out:
524 if (rename(newname, tmpname)) 639 if (chdir("../.."))
525 return 1; 640 return 1;
526 641
527 sym_change_count = 0; 642 return res;
643}
644
645int conf_write_autoconf(void)
646{
647 struct symbol *sym;
648 const char *str;
649 char *name;
650 FILE *out, *out_h;
651 time_t now;
652 int i, l;
653
654 sym_clear_all_valid();
655
656 file_write_dep("include/config/auto.conf.cmd");
657
658 if (conf_split_config())
659 return 1;
660
661 out = fopen(".tmpconfig", "w");
662 if (!out)
663 return 1;
664
665 out_h = fopen(".tmpconfig.h", "w");
666 if (!out_h) {
667 fclose(out);
668 return 1;
669 }
670
671 sym = sym_lookup("KERNELVERSION", 0);
672 sym_calc_value(sym);
673 time(&now);
674 fprintf(out, "#\n"
675 "# Automatically generated make config: don't edit\n"
676 "# Linux kernel version: %s\n"
677 "# %s"
678 "#\n",
679 sym_get_string_value(sym), ctime(&now));
680 fprintf(out_h, "/*\n"
681 " * Automatically generated C config: don't edit\n"
682 " * Linux kernel version: %s\n"
683 " * %s"
684 " */\n"
685 "#define AUTOCONF_INCLUDED\n",
686 sym_get_string_value(sym), ctime(&now));
687
688 for_all_symbols(i, sym) {
689 sym_calc_value(sym);
690 if (!(sym->flags & SYMBOL_WRITE) || !sym->name)
691 continue;
692 switch (sym->type) {
693 case S_BOOLEAN:
694 case S_TRISTATE:
695 switch (sym_get_tristate_value(sym)) {
696 case no:
697 break;
698 case mod:
699 fprintf(out, "CONFIG_%s=m\n", sym->name);
700 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
701 break;
702 case yes:
703 fprintf(out, "CONFIG_%s=y\n", sym->name);
704 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
705 break;
706 }
707 break;
708 case S_STRING:
709 str = sym_get_string_value(sym);
710 fprintf(out, "CONFIG_%s=\"", sym->name);
711 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
712 while (1) {
713 l = strcspn(str, "\"\\");
714 if (l) {
715 fwrite(str, l, 1, out);
716 fwrite(str, l, 1, out_h);
717 str += l;
718 }
719 if (!*str)
720 break;
721 fprintf(out, "\\%c", *str);
722 fprintf(out_h, "\\%c", *str);
723 str++;
724 }
725 fputs("\"\n", out);
726 fputs("\"\n", out_h);
727 break;
728 case S_HEX:
729 str = sym_get_string_value(sym);
730 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
731 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
732 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
733 break;
734 }
735 case S_INT:
736 str = sym_get_string_value(sym);
737 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
738 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
739 break;
740 default:
741 break;
742 }
743 }
744 fclose(out);
745 fclose(out_h);
746
747 name = getenv("KCONFIG_AUTOHEADER");
748 if (!name)
749 name = "include/linux/autoconf.h";
750 if (rename(".tmpconfig.h", name))
751 return 1;
752 name = getenv("KCONFIG_AUTOCONFIG");
753 if (!name)
754 name = "include/config/auto.conf";
755 /*
756 * This must be the last step, kbuild has a dependency on auto.conf
757 * and this marks the successful completion of the previous steps.
758 */
759 if (rename(".tmpconfig", name))
760 return 1;
528 761
529 return 0; 762 return 0;
530} 763}
generated by cgit v1.2.2 (git 2.25.0) at 2025-03-05 19:24:08 -0500