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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
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[] = "/dev/null";
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 = NULL;
74 char *env, *name;
75
76 name = conf_expand_value(conf_defname);
77 env = getenv(SRCTREE);
78 if (env) {
79 fullname = realloc(fullname, strlen(env) + strlen(name) + 2);
80 sprintf(fullname, "%s/%s", env, name);
81 if (!stat(fullname, &buf))
82 return fullname;
83 }
84 return name;
85}
86
87int conf_read_simple(const char *name)
88{
89 FILE *in = NULL;
90 char line[1024];
91 char *p, *p2;
92 struct symbol *sym;
93 int i;
94
95 if (name) {
96 in = zconf_fopen(name);
97 } else {
98 const char **names = conf_confnames;
99 while ((name = *names++)) {
100 name = conf_expand_value(name);
101 in = zconf_fopen(name);
102 if (in) {
103 printf(_("#\n"
104 "# using defaults found in %s\n"
105 "#\n"), name);
106 break;
107 }
108 }
109 }
110 if (!in)
111 return 1;
112
113 conf_filename = name;
114 conf_lineno = 0;
115 conf_warnings = 0;
116 conf_unsaved = 0;
117
118 for_all_symbols(i, sym) {
119 sym->flags |= SYMBOL_NEW | SYMBOL_CHANGED;
120 if (sym_is_choice(sym))
121 sym->flags &= ~SYMBOL_NEW;
122 sym->flags &= ~SYMBOL_VALID;
123 switch (sym->type) {
124 case S_INT:
125 case S_HEX:
126 case S_STRING:
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];
338 char tmpname[256];
339 char newname[256];
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;
377 file_write_dep(NULL);
378 }
379 sym = sym_lookup("KERNELVERSION", 0);
380 sym_calc_value(sym);
381 time(&now);
382 env = getenv("KCONFIG_NOTIMESTAMP");
383 if (env && *env)
384 use_timestamp = 0;
385
386 fprintf(out, _("#\n"
387 "# Automatically generated make config: don't edit\n"
388 "# Busybox version: %s\n"
389 "%s%s"
390 "#\n"),
391 sym_get_string_value(sym),
392 use_timestamp ? "# " : "",
393 use_timestamp ? ctime(&now) : "");
394 if (out_h) {
395 char buf[sizeof("#define AUTOCONF_TIMESTAMP "
396 "\"YYYY-MM-DD HH:MM:SS some_timezone\"\n")];
397 buf[0] = '\0';
398 if (use_timestamp) {
399 size_t ret = \
400 strftime(buf, sizeof(buf), "#define AUTOCONF_TIMESTAMP "
401 "\"%Y-%m-%d %H:%M:%S %Z\"\n", localtime(&now));
402
403
404
405
406 if (ret == 0)
407 strftime(buf, sizeof(buf), "#define AUTOCONF_TIMESTAMP "
408 "\"%Y-%m-%d %H:%M:%S\"\n", localtime(&now));
409 } else {
410 strcpy(buf, "#define AUTOCONF_TIMESTAMP \"\"\n");
411 }
412 fprintf(out_h, "/*\n"
413 " * Automatically generated C config: don't edit\n"
414 " * Busybox version: %s\n"
415 " */\n"
416 "%s"
417 "\n",
418 sym_get_string_value(sym),
419 buf);
420 }
421 if (!sym_change_count)
422 sym_clear_all_valid();
423
424 menu = rootmenu.list;
425 while (menu) {
426 sym = menu->sym;
427 if (!sym) {
428 if (!menu_is_visible(menu))
429 goto next;
430 str = menu_get_prompt(menu);
431 fprintf(out, "\n"
432 "#\n"
433 "# %s\n"
434 "#\n", str);
435 if (out_h)
436 fprintf(out_h, "\n"
437 "/*\n"
438 " * %s\n"
439 " */\n", str);
440 } else if (!(sym->flags & SYMBOL_CHOICE)) {
441 sym_calc_value(sym);
442
443
444
445
446 sym->flags &= ~SYMBOL_WRITE;
447 type = sym->type;
448 if (type == S_TRISTATE) {
449 sym_calc_value(modules_sym);
450 if (modules_sym->curr.tri == no)
451 type = S_BOOLEAN;
452 }
453 switch (type) {
454 case S_BOOLEAN:
455 case S_TRISTATE:
456 switch (sym_get_tristate_value(sym)) {
457 case no:
458 fprintf(out, "# CONFIG_%s is not set\n", sym->name);
459 if (out_h) {
460 fprintf(out_h, "#undef CONFIG_%s\n", sym->name);
461
462 fprintf(out_h, "#define ENABLE_%s 0\n", sym->name);
463 fprintf(out_h, "#define IF_%s(...)\n", sym->name);
464 fprintf(out_h, "#define IF_NOT_%s(...) __VA_ARGS__\n", sym->name);
465 }
466 break;
467 case mod:
468 fprintf(out, "CONFIG_%s=m\n", sym->name);
469 if (out_h)
470 fprintf(out_h, "#define CONFIG_%s_MODULE 1\n", sym->name);
471 break;
472 case yes:
473 fprintf(out, "CONFIG_%s=y\n", sym->name);
474 if (out_h) {
475 fprintf(out_h, "#define CONFIG_%s 1\n", sym->name);
476
477 fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
478 fprintf(out_h, "#ifdef MAKE_SUID\n");
479 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__ \"CONFIG_%s\"\n", sym->name, sym->name);
480 fprintf(out_h, "#else\n");
481 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__\n", sym->name);
482 fprintf(out_h, "#endif\n");
483 fprintf(out_h, "#define IF_NOT_%s(...)\n", sym->name);
484 }
485 break;
486 }
487 break;
488 case S_STRING:
489
490 str = sym_get_string_value(sym);
491 fprintf(out, "CONFIG_%s=\"", sym->name);
492 if (out_h)
493 fprintf(out_h, "#define CONFIG_%s \"", sym->name);
494 do {
495 l = strcspn(str, "\"\\");
496 if (l) {
497 fwrite(str, l, 1, out);
498 if (out_h)
499 fwrite(str, l, 1, out_h);
500 }
501 str += l;
502 while (*str == '\\' || *str == '"') {
503 fprintf(out, "\\%c", *str);
504 if (out_h)
505 fprintf(out_h, "\\%c", *str);
506 str++;
507 }
508 } while (*str);
509 fputs("\"\n", out);
510 if (out_h) {
511 fputs("\"\n", out_h);
512
513 fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
514 fprintf(out_h, "#ifdef MAKE_SUID\n");
515 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__ \"CONFIG_%s\"\n", sym->name, sym->name);
516 fprintf(out_h, "#else\n");
517 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__\n", sym->name);
518 fprintf(out_h, "#endif\n");
519 fprintf(out_h, "#define IF_NOT_%s(...)\n", sym->name);
520 }
521 break;
522 case S_HEX:
523 str = sym_get_string_value(sym);
524 if (str[0] != '0' || (str[1] != 'x' && str[1] != 'X')) {
525 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
526 if (out_h) {
527 fprintf(out_h, "#define CONFIG_%s 0x%s\n", sym->name, str);
528
529 fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
530 fprintf(out_h, "#ifdef MAKE_SUID\n");
531 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__ \"CONFIG_%s\"\n", sym->name, sym->name);
532 fprintf(out_h, "#else\n");
533 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__\n", sym->name);
534 fprintf(out_h, "#endif\n");
535 fprintf(out_h, "#define IF_NOT_%s(...)\n", sym->name);
536 }
537 break;
538 }
539 case S_INT:
540 str = sym_get_string_value(sym);
541 if (!str[0])
542 str = "0";
543 fprintf(out, "CONFIG_%s=%s\n", sym->name, str);
544 if (out_h) {
545 fprintf(out_h, "#define CONFIG_%s %s\n", sym->name, str);
546
547 fprintf(out_h, "#define ENABLE_%s 1\n", sym->name);
548 fprintf(out_h, "#ifdef MAKE_SUID\n");
549 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__ \"CONFIG_%s\"\n", sym->name, sym->name);
550 fprintf(out_h, "#else\n");
551 fprintf(out_h, "# define IF_%s(...) __VA_ARGS__\n", sym->name);
552 fprintf(out_h, "#endif\n");
553 fprintf(out_h, "#define IF_NOT_%s(...)\n", sym->name);
554 }
555 break;
556 }
557 }
558
559 next:
560 if (menu->list) {
561 menu = menu->list;
562 continue;
563 }
564 if (menu->next)
565 menu = menu->next;
566 else while ((menu = menu->parent)) {
567 if (menu->next) {
568 menu = menu->next;
569 break;
570 }
571 }
572 }
573 fclose(out);
574 if (out_h) {
575 fclose(out_h);
576 rename(".tmpconfig.h", "include/autoconf.h");
577 }
578 if (!name || basename != conf_def_filename) {
579 if (!name)
580 name = conf_def_filename;
581 sprintf(tmpname, "%s.old", name);
582 rename(name, tmpname);
583 }
584 sprintf(tmpname, "%s%s", dirname, basename);
585 if (rename(newname, tmpname))
586 return 1;
587
588 sym_change_count = 0;
589
590 return 0;
591}
592
