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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
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> | |
8 | #include <stdio.h> | |
9 | #include <stdlib.h> | |
10 | #include <string.h> | |
11 | #include <time.h> | |
12 | #include <unistd.h> | |
13 | ||
14 | #define LKC_DIRECT_LINK | |
15 | #include "lkc.h" | |
16 | ||
c1a0f5e3 RZ |
17 | static void conf_warning(const char *fmt, ...) |
18 | __attribute__ ((format (printf, 1, 2))); | |
19 | ||
20 | static const char *conf_filename; | |
21 | static int conf_lineno, conf_warnings, conf_unsaved; | |
22 | ||
1da177e4 LT |
23 | const char conf_def_filename[] = ".config"; |
24 | ||
25 | const char conf_defname[] = "arch/$ARCH/defconfig"; | |
26 | ||
27 | const char *conf_confnames[] = { | |
28 | ".config", | |
29 | "/lib/modules/$UNAME_RELEASE/.config", | |
30 | "/etc/kernel-config", | |
31 | "/boot/config-$UNAME_RELEASE", | |
32 | conf_defname, | |
33 | NULL, | |
34 | }; | |
35 | ||
c1a0f5e3 RZ |
36 | static void conf_warning(const char *fmt, ...) |
37 | { | |
38 | va_list ap; | |
39 | va_start(ap, fmt); | |
40 | fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno); | |
41 | vfprintf(stderr, fmt, ap); | |
42 | fprintf(stderr, "\n"); | |
43 | va_end(ap); | |
44 | conf_warnings++; | |
45 | } | |
46 | ||
48b9d03c | 47 | static char *conf_expand_value(const char *in) |
1da177e4 LT |
48 | { |
49 | struct symbol *sym; | |
48b9d03c | 50 | const char *src; |
1da177e4 LT |
51 | static char res_value[SYMBOL_MAXLENGTH]; |
52 | char *dst, name[SYMBOL_MAXLENGTH]; | |
53 | ||
54 | res_value[0] = 0; | |
55 | dst = name; | |
56 | while ((src = strchr(in, '$'))) { | |
57 | strncat(res_value, in, src - in); | |
58 | src++; | |
59 | dst = name; | |
60 | while (isalnum(*src) || *src == '_') | |
61 | *dst++ = *src++; | |
62 | *dst = 0; | |
63 | sym = sym_lookup(name, 0); | |
64 | sym_calc_value(sym); | |
65 | strcat(res_value, sym_get_string_value(sym)); | |
66 | in = src; | |
67 | } | |
68 | strcat(res_value, in); | |
69 | ||
70 | return res_value; | |
71 | } | |
72 | ||
73 | char *conf_get_default_confname(void) | |
74 | { | |
75 | struct stat buf; | |
76 | static char fullname[PATH_MAX+1]; | |
77 | char *env, *name; | |
78 | ||
79 | name = conf_expand_value(conf_defname); | |
80 | env = getenv(SRCTREE); | |
81 | if (env) { | |
82 | sprintf(fullname, "%s/%s", env, name); | |
83 | if (!stat(fullname, &buf)) | |
84 | return fullname; | |
85 | } | |
86 | return name; | |
87 | } | |
88 | ||
90389160 | 89 | int conf_read_simple(const char *name) |
1da177e4 LT |
90 | { |
91 | FILE *in = NULL; | |
92 | char line[1024]; | |
93 | char *p, *p2; | |
1da177e4 | 94 | struct symbol *sym; |
1da177e4 LT |
95 | int i; |
96 | ||
97 | if (name) { | |
98 | in = zconf_fopen(name); | |
99 | } else { | |
100 | const char **names = conf_confnames; | |
101 | while ((name = *names++)) { | |
102 | name = conf_expand_value(name); | |
103 | in = zconf_fopen(name); | |
104 | if (in) { | |
3b9fa093 ACM |
105 | printf(_("#\n" |
106 | "# using defaults found in %s\n" | |
107 | "#\n"), name); | |
1da177e4 LT |
108 | break; |
109 | } | |
110 | } | |
111 | } | |
1da177e4 LT |
112 | if (!in) |
113 | return 1; | |
114 | ||
c1a0f5e3 RZ |
115 | conf_filename = name; |
116 | conf_lineno = 0; | |
117 | conf_warnings = 0; | |
118 | conf_unsaved = 0; | |
119 | ||
1da177e4 LT |
120 | for_all_symbols(i, sym) { |
121 | sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED; | |
c1a0f5e3 RZ |
122 | if (sym_is_choice(sym)) |
123 | sym->flags &= ~SYMBOL_NEW; | |
1da177e4 LT |
124 | sym->flags &= ~SYMBOL_VALID; |
125 | switch (sym->type) { | |
126 | case S_INT: | |
127 | case S_HEX: | |
128 | case S_STRING: | |
129 | if (sym->user.val) | |
130 | free(sym->user.val); | |
131 | default: | |
132 | sym->user.val = NULL; | |
133 | sym->user.tri = no; | |
134 | } | |
135 | } | |
136 | ||
137 | while (fgets(line, sizeof(line), in)) { | |
c1a0f5e3 | 138 | conf_lineno++; |
1da177e4 LT |
139 | sym = NULL; |
140 | switch (line[0]) { | |
141 | case '#': | |
142 | if (memcmp(line + 2, "CONFIG_", 7)) | |
143 | continue; | |
144 | p = strchr(line + 9, ' '); | |
145 | if (!p) | |
146 | continue; | |
147 | *p++ = 0; | |
148 | if (strncmp(p, "is not set", 10)) | |
149 | continue; | |
150 | sym = sym_find(line + 9); | |
151 | if (!sym) { | |
c1a0f5e3 RZ |
152 | conf_warning("trying to assign nonexistent symbol %s", line + 9); |
153 | break; | |
154 | } else if (!(sym->flags & SYMBOL_NEW)) { | |
155 | conf_warning("trying to reassign symbol %s", sym->name); | |
1da177e4 LT |
156 | break; |
157 | } | |
158 | switch (sym->type) { | |
159 | case S_BOOLEAN: | |
160 | case S_TRISTATE: | |
161 | sym->user.tri = no; | |
162 | sym->flags &= ~SYMBOL_NEW; | |
163 | break; | |
164 | default: | |
165 | ; | |
166 | } | |
167 | break; | |
168 | case 'C': | |
c1a0f5e3 RZ |
169 | if (memcmp(line, "CONFIG_", 7)) { |
170 | conf_warning("unexpected data"); | |
1da177e4 | 171 | continue; |
c1a0f5e3 | 172 | } |
1da177e4 LT |
173 | p = strchr(line + 7, '='); |
174 | if (!p) | |
175 | continue; | |
176 | *p++ = 0; | |
177 | p2 = strchr(p, '\n'); | |
178 | if (p2) | |
179 | *p2 = 0; | |
180 | sym = sym_find(line + 7); | |
181 | if (!sym) { | |
c1a0f5e3 RZ |
182 | conf_warning("trying to assign nonexistent symbol %s", line + 7); |
183 | break; | |
184 | } else if (!(sym->flags & SYMBOL_NEW)) { | |
185 | conf_warning("trying to reassign symbol %s", sym->name); | |
1da177e4 LT |
186 | break; |
187 | } | |
188 | switch (sym->type) { | |
189 | case S_TRISTATE: | |
190 | if (p[0] == 'm') { | |
191 | sym->user.tri = mod; | |
192 | sym->flags &= ~SYMBOL_NEW; | |
193 | break; | |
194 | } | |
195 | case S_BOOLEAN: | |
196 | if (p[0] == 'y') { | |
197 | sym->user.tri = yes; | |
198 | sym->flags &= ~SYMBOL_NEW; | |
199 | break; | |
200 | } | |
201 | if (p[0] == 'n') { | |
202 | sym->user.tri = no; | |
203 | sym->flags &= ~SYMBOL_NEW; | |
204 | break; | |
205 | } | |
c1a0f5e3 | 206 | conf_warning("symbol value '%s' invalid for %s", p, sym->name); |
1da177e4 LT |
207 | break; |
208 | case S_STRING: | |
209 | if (*p++ != '"') | |
210 | break; | |
211 | for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) { | |
212 | if (*p2 == '"') { | |
213 | *p2 = 0; | |
214 | break; | |
215 | } | |
216 | memmove(p2, p2 + 1, strlen(p2)); | |
217 | } | |
218 | if (!p2) { | |
c1a0f5e3 RZ |
219 | conf_warning("invalid string found"); |
220 | continue; | |
1da177e4 LT |
221 | } |
222 | case S_INT: | |
223 | case S_HEX: | |
224 | if (sym_string_valid(sym, p)) { | |
225 | sym->user.val = strdup(p); | |
226 | sym->flags &= ~SYMBOL_NEW; | |
227 | } else { | |
c1a0f5e3 RZ |
228 | conf_warning("symbol value '%s' invalid for %s", p, sym->name); |
229 | continue; | |
1da177e4 LT |
230 | } |
231 | break; | |
232 | default: | |
233 | ; | |
234 | } | |
235 | break; | |
236 | case '\n': | |
237 | break; | |
238 | default: | |
c1a0f5e3 | 239 | conf_warning("unexpected data"); |
1da177e4 LT |
240 | continue; |
241 | } | |
242 | if (sym && sym_is_choice_value(sym)) { | |
243 | struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); | |
244 | switch (sym->user.tri) { | |
245 | case no: | |
246 | break; | |
247 | case mod: | |
c1a0f5e3 RZ |
248 | if (cs->user.tri == yes) { |
249 | conf_warning("%s creates inconsistent choice state", sym->name); | |
250 | cs->flags |= SYMBOL_NEW; | |
251 | } | |
1da177e4 LT |
252 | break; |
253 | case yes: | |
c1a0f5e3 RZ |
254 | if (cs->user.tri != no) { |
255 | conf_warning("%s creates inconsistent choice state", sym->name); | |
256 | cs->flags |= SYMBOL_NEW; | |
257 | } else | |
258 | cs->user.val = sym; | |
1da177e4 LT |
259 | break; |
260 | } | |
261 | cs->user.tri = E_OR(cs->user.tri, sym->user.tri); | |
1da177e4 LT |
262 | } |
263 | } | |
264 | fclose(in); | |
265 | ||
266 | if (modules_sym) | |
267 | sym_calc_value(modules_sym); | |
90389160 RZ |
268 | return 0; |
269 | } | |
270 | ||
271 | int conf_read(const char *name) | |
272 | { | |
273 | struct symbol *sym; | |
274 | struct property *prop; | |
275 | struct expr *e; | |
276 | int i; | |
277 | ||
278 | if (conf_read_simple(name)) | |
279 | return 1; | |
280 | ||
1da177e4 LT |
281 | for_all_symbols(i, sym) { |
282 | sym_calc_value(sym); | |
c1a0f5e3 RZ |
283 | if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO)) |
284 | goto sym_ok; | |
285 | if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { | |
286 | /* check that calculated value agrees with saved value */ | |
287 | switch (sym->type) { | |
288 | case S_BOOLEAN: | |
289 | case S_TRISTATE: | |
290 | if (sym->user.tri != sym_get_tristate_value(sym)) | |
291 | break; | |
292 | if (!sym_is_choice(sym)) | |
293 | goto sym_ok; | |
294 | default: | |
295 | if (!strcmp(sym->curr.val, sym->user.val)) | |
296 | goto sym_ok; | |
297 | break; | |
298 | } | |
299 | } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE)) | |
300 | /* no previous value and not saved */ | |
301 | goto sym_ok; | |
302 | conf_unsaved++; | |
303 | /* maybe print value in verbose mode... */ | |
304 | sym_ok: | |
1da177e4 LT |
305 | if (sym_has_value(sym) && !sym_is_choice_value(sym)) { |
306 | if (sym->visible == no) | |
307 | sym->flags |= SYMBOL_NEW; | |
308 | switch (sym->type) { | |
309 | case S_STRING: | |
310 | case S_INT: | |
311 | case S_HEX: | |
c1a0f5e3 | 312 | if (!sym_string_within_range(sym, sym->user.val)) { |
1da177e4 | 313 | sym->flags |= SYMBOL_NEW; |
c1a0f5e3 RZ |
314 | sym->flags &= ~SYMBOL_VALID; |
315 | } | |
1da177e4 LT |
316 | default: |
317 | break; | |
318 | } | |
319 | } | |
320 | if (!sym_is_choice(sym)) | |
321 | continue; | |
322 | prop = sym_get_choice_prop(sym); | |
323 | for (e = prop->expr; e; e = e->left.expr) | |
324 | if (e->right.sym->visible != no) | |
325 | sym->flags |= e->right.sym->flags & SYMBOL_NEW; | |
326 | } | |
327 | ||
b5ac4817 | 328 | sym_change_count = conf_warnings || conf_unsaved; |
1da177e4 LT |
329 | |
330 | return 0; | |
331 | } | |
332 | ||
333 | int conf_write(const char *name) | |
334 | { | |
335 | FILE *out, *out_h; | |
336 | struct symbol *sym; | |
337 | struct menu *menu; | |
338 | const char *basename; | |
339 | char dirname[128], tmpname[128], newname[128]; | |
340 | int type, l; | |
341 | const char *str; | |
342 | time_t now; | |
343 | int use_timestamp = 1; | |
344 | char *env; | |
345 | ||
346 | dirname[0] = 0; | |
347 | if (name && name[0]) { | |
348 | struct stat st; | |
349 | char *slash; | |
350 | ||
351 | if (!stat(name, &st) && S_ISDIR(st.st_mode)) { | |
352 | strcpy(dirname, name); | |
353 | strcat(dirname, "/"); | |
354 | basename = conf_def_filename; | |
355 | } else if ((slash = strrchr(name, '/'))) { | |
356 | int size = slash - name + 1; | |
357 | memcpy(dirname, name, size); | |
358 | dirname[size] = 0; | |
359 | if (slash[1]) | |
360 | basename = slash + 1; | |
361 | else | |
362 | basename = conf_def_filename; | |
363 | } else | |
364 | basename = name; | |
365 | } else | |
366 | basename = conf_def_filename; | |
367 | ||
368 | sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid()); | |
369 | out = fopen(newname, "w"); | |
370 | if (!out) | |
371 | return 1; | |
372 | out_h = NULL; | |
373 | if (!name) { | |
374 | out_h = fopen(".tmpconfig.h", "w"); | |
375 | if (!out_h) | |
376 | return 1; | |
dc9a49a4 | 377 | file_write_dep(NULL); |
1da177e4 | 378 | } |
2244cbd8 | 379 | sym = sym_lookup("KERNELVERSION", 0); |
1da177e4 LT |
380 | sym_calc_value(sym); |
381 | time(&now); | |
382 | env = getenv("KCONFIG_NOTIMESTAMP"); | |
383 | if (env && *env) | |
384 | use_timestamp = 0; | |
385 | ||
3b9fa093 ACM |
386 | fprintf(out, _("#\n" |
387 | "# Automatically generated make config: don't edit\n" | |
388 | "# Linux kernel version: %s\n" | |
389 | "%s%s" | |
390 | "#\n"), | |
1da177e4 LT |
391 | sym_get_string_value(sym), |
392 | use_timestamp ? "# " : "", | |
393 | 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 | ||
405 | if (!sym_change_count) | |
406 | sym_clear_all_valid(); | |
407 | ||
408 | menu = rootmenu.list; | |
409 | while (menu) { | |
410 | sym = menu->sym; | |
411 | if (!sym) { | |
412 | if (!menu_is_visible(menu)) | |
413 | goto next; | |
414 | str = menu_get_prompt(menu); | |
415 | fprintf(out, "\n" | |
416 | "#\n" | |
417 | "# %s\n" | |
418 | "#\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)) { | |
425 | sym_calc_value(sym); | |
426 | if (!(sym->flags & SYMBOL_WRITE)) | |
427 | goto next; | |
428 | sym->flags &= ~SYMBOL_WRITE; | |
429 | type = sym->type; | |
430 | if (type == S_TRISTATE) { | |
431 | sym_calc_value(modules_sym); | |
432 | if (modules_sym->curr.tri == no) | |
433 | type = S_BOOLEAN; | |
434 | } | |
435 | switch (type) { | |
436 | case S_BOOLEAN: | |
437 | case S_TRISTATE: | |
438 | switch (sym_get_tristate_value(sym)) { | |
439 | case no: | |
440 | 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; | |
444 | case mod: | |
445 | 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; | |
449 | case yes: | |
450 | 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; | |
454 | } | |
455 | break; | |
456 | case S_STRING: | |
457 | // fix me | |
458 | str = sym_get_string_value(sym); | |
459 | fprintf(out, "CONFIG_%s=\"", sym->name); | |
460 | if (out_h) | |
461 | fprintf(out_h, "#define CONFIG_%s \"", sym->name); | |
462 | do { | |
463 | l = strcspn(str, "\"\\"); | |
464 | if (l) { | |
465 | fwrite(str, l, 1, out); | |
466 | if (out_h) | |
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 | } | |
476 | } while (*str); | |
477 | fputs("\"\n", out); | |
478 | if (out_h) | |
479 | fputs("\"\n", out_h); | |
480 | break; | |
481 | case S_HEX: | |
482 | str = sym_get_string_value(sym); | |
483 | if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) { | |
484 | 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; | |
488 | } | |
489 | case S_INT: | |
490 | str = sym_get_string_value(sym); | |
491 | 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 | } | |
496 | } | |
497 | ||
498 | next: | |
499 | if (menu->list) { | |
500 | menu = menu->list; | |
501 | continue; | |
502 | } | |
503 | if (menu->next) | |
504 | menu = menu->next; | |
505 | else while ((menu = menu->parent)) { | |
506 | if (menu->next) { | |
507 | menu = menu->next; | |
508 | break; | |
509 | } | |
510 | } | |
511 | } | |
512 | fclose(out); | |
513 | if (out_h) { | |
514 | fclose(out_h); | |
515 | rename(".tmpconfig.h", "include/linux/autoconf.h"); | |
1da177e4 LT |
516 | } |
517 | if (!name || basename != conf_def_filename) { | |
518 | if (!name) | |
519 | name = conf_def_filename; | |
520 | sprintf(tmpname, "%s.old", name); | |
521 | rename(name, tmpname); | |
522 | } | |
523 | sprintf(tmpname, "%s%s", dirname, basename); | |
524 | if (rename(newname, tmpname)) | |
525 | return 1; | |
526 | ||
527 | sym_change_count = 0; | |
528 | ||
529 | return 0; | |
530 | } |