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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
17static void conf_warning(const char *fmt, ...)
18 __attribute__ ((format (printf, 1, 2)));
19
20static const char *conf_filename;
21static int conf_lineno, conf_warnings, conf_unsaved;
22
23const char conf_def_filename[] = ".config";
24
25const char conf_defname[] = "scripts/defconfig";
26
27const char *conf_confnames[] = {
28 conf_def_filename,
29 conf_defname,
30 NULL,
31};
32
33static void conf_warning(const char *fmt, ...)
34{
35 va_list ap;
36 va_start(ap, fmt);
37 fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno);
38 vfprintf(stderr, fmt, ap);
39 fprintf(stderr, "\n");
40 va_end(ap);
41 conf_warnings++;
42}
43
44static char *conf_expand_value(const char *in)
45{
46 struct symbol *sym;
47 const char *src;
48 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
86int conf_read_simple(const char *name)
87{
88 FILE *in = NULL;
89 char line[1024];
90 char *p, *p2;
91 struct symbol *sym;
92 int i;
93
94 if (name) {
95 in = zconf_fopen(name);
96 } else {
97 const char **names = conf_confnames;
98 while ((name = *names++)) {
99 name = conf_expand_value(name);
100 in = zconf_fopen(name);
101 if (in) {
102 printf(_("#\n"
103 "# using defaults found in %s\n"
104 "#\n"), name);
105 break;
106 }
107 }
108 }
109 if (!in)
110 return 1;
111
112 conf_filename = name;
113 conf_lineno = 0;
114 conf_warnings = 0;
115 conf_unsaved = 0;
116
117 for_all_symbols(i, sym) {
118 sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
119 if (sym_is_choice(sym))
120 sym->flags &= ~SYMBOL_NEW;
121 sym->flags &= ~SYMBOL_VALID;
122 switch (sym->type) {
123 case S_INT:
124 case S_HEX:
125 case S_STRING:
126 if (sym->user.val)
127 free(sym->user.val);
128 default:
129 sym->user.val = NULL;
130 sym->user.tri = no;
131 }
132 }
133
134 while (fgets(line, sizeof(line), in)) {
135 conf_lineno++;
136 sym = NULL;
137 switch (line[0]) {
138 case '#':
139 if (memcmp(line + 2, "CONFIG_", 7))
140 continue;
141 p = strchr(line + 9, ' ');
142 if (!p)
143 continue;
144 *p++ = 0;
145 if (strncmp(p, "is not set", 10))
146 continue;
147 sym = sym_find(line + 9);
148 if (!sym) {
149 conf_warning("trying to assign nonexistent symbol %s", line + 9);
150 break;
151 } else if (!(sym->flags & SYMBOL_NEW)) {
152 conf_warning("trying to reassign symbol %s", sym->name);
153 break;
154 }
155 switch (sym->type) {
156 case S_BOOLEAN:
157 case S_TRISTATE:
158 sym->user.tri = no;
159 sym->flags &= ~SYMBOL_NEW;
160 break;
161 default:
162 ;
163 }
164 break;
165 case 'C':
166 if (memcmp(line, "CONFIG_", 7)) {
167 conf_warning("unexpected data");
168 continue;
169 }
170 p = strchr(line + 7, '=');
171 if (!p)
172 continue;
173 *p++ = 0;
174 p2 = strchr(p, '\n');
175 if (p2)
176 *p2 = 0;
177 sym = sym_find(line + 7);
178 if (!sym) {
179 conf_warning("trying to assign nonexistent symbol %s", line + 7);
180 break;
181 } else if (!(sym->flags & SYMBOL_NEW)) {
182 conf_warning("trying to reassign symbol %s", sym->name);
183 break;
184 }
185 switch (sym->type) {
186 case S_TRISTATE:
187 if (p[0] == 'm') {
188 sym->user.tri = mod;
189 sym->flags &= ~SYMBOL_NEW;
190 break;
191 }
192 case S_BOOLEAN:
193 if (p[0] == 'y') {
194 sym->user.tri = yes;
195 sym->flags &= ~SYMBOL_NEW;
196 break;
197 }
198 if (p[0] == 'n') {
199 sym->user.tri = no;
200 sym->flags &= ~SYMBOL_NEW;
201 break;
202 }
203 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
204 break;
205 case S_STRING:
206 if (*p++ != '"')
207 break;
208 for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) {
209 if (*p2 == '"') {
210 *p2 = 0;
211 break;
212 }
213 memmove(p2, p2 + 1, strlen(p2));
214 }
215 if (!p2) {
216 conf_warning("invalid string found");
217 continue;
218 }
219 case S_INT:
220 case S_HEX:
221 if (sym_string_valid(sym, p)) {
222 sym->user.val = strdup(p);
223 sym->flags &= ~SYMBOL_NEW;
224 } else {
225 if (p[0])
226 conf_warning("symbol value '%s' invalid for %s", p, sym->name);
227 continue;
228 }
229 break;
230 default:
231 ;
232 }
233 break;
234 case '\n':
235 break;
236 default:
237 conf_warning("unexpected data");
238 continue;
239 }
240 if (sym && sym_is_choice_value(sym)) {
241 struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym));
242 switch (sym->user.tri) {
243 case no:
244 break;
245 case mod:
246 if (cs->user.tri == yes) {
247 conf_warning("%s creates inconsistent choice state", sym->name);
248 cs->flags |= SYMBOL_NEW;
249 }
250 break;
251 case yes:
252 if (cs->user.tri != no) {
253 conf_warning("%s creates inconsistent choice state", sym->name);
254 cs->flags |= SYMBOL_NEW;
255 } else
256 cs->user.val = sym;
257 break;
258 }
259 cs->user.tri = E_OR(cs->user.tri, sym->user.tri);
260 }
261 }
262 fclose(in);
263
264 if (modules_sym)
265 sym_calc_value(modules_sym);
266 return 0;
267}
268
269int conf_read(const char *name)
270{
271 struct symbol *sym;
272 struct property *prop;
273 struct expr *e;
274 int i;
275
276 if (conf_read_simple(name))
277 return 1;
278
279 for_all_symbols(i, sym) {
280 sym_calc_value(sym);
281 if (sym_is_choice(sym) || (sym->flags & SYMBOL_AUTO))
282 goto sym_ok;
283 if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) {
284
285 switch (sym->type) {
286 case S_BOOLEAN:
287 case S_TRISTATE:
288 if (sym->user.tri != sym_get_tristate_value(sym))
289 break;
290 if (!sym_is_choice(sym))
291 goto sym_ok;
292 default:
293 if (!strcmp(sym->curr.val, sym->user.val))
294 goto sym_ok;
295 break;
296 }
297 } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE))
298
299 goto sym_ok;
300 conf_unsaved++;
301
302 sym_ok:
303 if (sym_has_value(sym) && !sym_is_choice_value(sym)) {
304 if (sym->visible == no)
305 sym->flags |= SYMBOL_NEW;
306 switch (sym->type) {
307 case S_STRING:
308 case S_INT:
309 case S_HEX:
310 if (!sym_string_within_range(sym, sym->user.val)) {
311 sym->flags |= SYMBOL_NEW;
312 sym->flags &= ~SYMBOL_VALID;
313 }
314 default:
315 break;
316 }
317 }
318 if (!sym_is_choice(sym))
319 continue;
320 prop = sym_get_choice_prop(sym);
321 for (e = prop->expr; e; e = e->left.expr)
322 if (e->right.sym->visible != no)
323 sym->flags |= e->right.sym->flags & SYMBOL_NEW;
324 }
325
326 sym_change_count = conf_warnings || conf_unsaved;
327
328 return 0;
329}
330
331int conf_write(const char *name)
332{
333 FILE *out, *out_h;
334 struct symbol *sym;
335 struct menu *menu;
336 const char *basename;
337 char dirname[128], tmpname[128], newname[128];
338 int type, l;
339 const char *str;
340 time_t now;
341 int use_timestamp = 1;
342 char *env;
343
344 dirname[0] = 0;
345 if (name && name[0]) {
346 struct stat st;
347 char *slash;
348
349 if (!stat(name, &st) && S_ISDIR(st.st_mode)) {
350 strcpy(dirname, name);
351 strcat(dirname, "/");
352 basename = conf_def_filename;
353 } else if ((slash = strrchr(name, '/'))) {
354 int size = slash - name + 1;
355 memcpy(dirname, name, size);
356 dirname[size] = 0;
357 if (slash[1])
358 basename = slash + 1;
359 else
360 basename = conf_def_filename;
361 } else
362 basename = name;
363 } else
364 basename = conf_def_filename;
365
366 sprintf(newname, "%s.tmpconfig.%d", dirname, (int)getpid());
367 out = fopen(newname, "w");
368 if (!out)
369 return 1;
370 out_h = NULL;
371 if (!name) {
372 out_h = fopen(".tmpconfig.h", "w");
373 if (!out_h)
374 return 1;
375 file_write_dep(NULL);
376 }
377 sym = sym_lookup("KERNELVERSION", 0);
378 sym_calc_value(sym);
379 time(&now);
380 env = getenv("KCONFIG_NOTIMESTAMP");
381 if (env && *env)
382 use_timestamp = 0;
383
384 fprintf(out, _("#\n"
385 "# Automatically generated make config: don't edit\n"
386 "# Busybox version: %s\n"
387 "%s%s"
388 "#\n"),
389 sym_get_string_value(sym),
390 use_timestamp ? "# " : "",
391 use_timestamp ? ctime(&now) : "");
392 if (out_h) {
393 char buf[sizeof("#define AUTOCONF_TIMESTAMP "
394 "\"YYYY-MM-DD HH:MM:SS some_timezone\"\n")];
395 buf[0] = '\0';
396 if (use_timestamp) {
397 size_t ret = \
398 strftime(buf, sizeof(buf), "#define AUTOCONF_TIMESTAMP "
399 "\"%Y-%m-%d %H:%M:%S %Z\"\n", localtime(&now));
400
401
402
403
404 if (ret == 0)
405 strftime(buf, sizeof(buf), "#define AUTOCONF_TIMESTAMP "
406 "\"%Y-%m-%d %H:%M:%S\"\n", localtime(&now));
407 } else {
408 strcpy(buf, "#define AUTOCONF_TIMESTAMP \"\"\n");
409 }
410 fprintf(out_h, "/*\n"
411 " * Automatically generated C config: don't edit\n"
412 " * Busybox version: %s\n"
413 " */\n"
414 "%s"
415 "\n",
416 sym_get_string_value(sym),
417 buf);
418 }
419 if (!sym_change_count)
420 sym_clear_all_valid();
421
422 menu = rootmenu.list;
423 while (menu) {
424 sym = menu->sym;
425 if (!sym) {
426 if (!menu_is_visible(menu))
427 goto next;
428 str = menu_get_prompt(menu);
429 fprintf(out, "\n"
430 "#\n"
431 "# %s\n"
432 "#\n", str);
433 if (out_h)
434 fprintf(out_h, "\n"
435 "/*\n"
436 " * %s\n"
437 " */\n", str);
438 } else if (!(sym->flags & SYMBOL_CHOICE)) {
439 sym_calc_value(sym);
440
441
442
443
444 sym->flags &= ~SYMBOL_WRITE;
445 type = sym->type;
446 if (type == S_TRISTATE) {
447 sym_calc_value(modules_sym);
448 if (modules_sym->curr.tri == no)
449 type = S_BOOLEAN;
450 }
451 switch (type) {
452 case S_BOOLEAN:
453 case S_TRISTATE:
454 switch (sym_get_tristate_value(sym)) {
455 case no:
456 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
457 if (out_h) {
458 fprintf(out_h, "#undef CONFIG_%s\n", sym->name);
459
460 fprintf(out_h, "#define ENABLE_%s 0\n", sym->name);
461 fprintf(out_h, "#define USE_%s(...)\n", sym->name);
462 fprintf(out_h, "#define SKIP_%s(...) __VA_ARGS__\n", sym->name);
463 }
464 break;
465 case mod:
466 fprintf(out, "CONFIG_%s=m\n", sym->name);
467 if (out_h)
468 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
469 break;
470 case yes:
471 fprintf(out, "CONFIG_%s=y\n", sym->name);
472 if (out_h) {
473 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
474
475 fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
476 fprintf(out_h, "#define USE_%s(...) __VA_ARGS__\n", sym->name);
477 fprintf(out_h, "#define SKIP_%s(...)\n", sym->name);
478 }
479 break;
480 }
481 break;
482 case S_STRING:
483
484 str = sym_get_string_value(sym);
485 fprintf(out, "CONFIG_%s=\"", sym->name);
486 if (out_h)
487 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
488 do {
489 l = strcspn(str, "\"\\");
490 if (l) {
491 fwrite(str, l, 1, out);
492 if (out_h)
493 fwrite(str, l, 1, out_h);
494 }
495 str += l;
496 while (*str == '\\' || *str == '"') {
497 fprintf(out, "\\%c", *str);
498 if (out_h)
499 fprintf(out_h, "\\%c", *str);
500 str++;
501 }
502 } while (*str);
503 fputs("\"\n", out);
504 if (out_h) {
505 fputs("\"\n", out_h);
506
507 fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
508 fprintf(out_h, "#define USE_%s(...) __VA_ARGS__\n", sym->name);
509 fprintf(out_h, "#define SKIP_%s(...)\n", sym->name);
510 }
511 break;
512 case S_HEX:
513 str = sym_get_string_value(sym);
514 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
515 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
516 if (out_h) {
517 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
518
519 fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
520 fprintf(out_h, "#define USE_%s(...) __VA_ARGS__\n", sym->name);
521 fprintf(out_h, "#define SKIP_%s(...)\n", sym->name);
522 }
523 break;
524 }
525 case S_INT:
526 str = sym_get_string_value(sym);
527 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
528 if (out_h) {
529 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
530
531 fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
532 fprintf(out_h, "#define USE_%s(...) __VA_ARGS__\n", sym->name);
533 fprintf(out_h, "#define SKIP_%s(...)\n", sym->name);
534 }
535 break;
536 }
537 }
538
539 next:
540 if (menu->list) {
541 menu = menu->list;
542 continue;
543 }
544 if (menu->next)
545 menu = menu->next;
546 else while ((menu = menu->parent)) {
547 if (menu->next) {
548 menu = menu->next;
549 break;
550 }
551 }
552 }
553 fclose(out);
554 if (out_h) {
555 fclose(out_h);
556 rename(".tmpconfig.h", "include/autoconf.h");
557 }
558 if (!name || basename != conf_def_filename) {
559 if (!name)
560 name = conf_def_filename;
561 sprintf(tmpname, "%s.old", name);
562 rename(name, tmpname);
563 }
564 sprintf(tmpname, "%s%s", dirname, basename);
565 if (rename(newname, tmpname))
566 return 1;
567
568 sym_change_count = 0;
569
570 return 0;
571}
572
