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0c874100 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org> | |
1da177e4 LT |
4 | */ |
5 | ||
67424f61 | 6 | #include <sys/mman.h> |
1da177e4 | 7 | #include <sys/stat.h> |
78cb0907 | 8 | #include <sys/types.h> |
1da177e4 | 9 | #include <ctype.h> |
94bedeca | 10 | #include <errno.h> |
2e3646e5 | 11 | #include <fcntl.h> |
558e78e3 | 12 | #include <limits.h> |
10a4b277 | 13 | #include <stdarg.h> |
1da177e4 LT |
14 | #include <stdio.h> |
15 | #include <stdlib.h> | |
16 | #include <string.h> | |
17 | #include <time.h> | |
18 | #include <unistd.h> | |
19 | ||
1da177e4 LT |
20 | #include "lkc.h" |
21 | ||
0608182a MY |
22 | /* return true if 'path' exists, false otherwise */ |
23 | static bool is_present(const char *path) | |
24 | { | |
25 | struct stat st; | |
26 | ||
27 | return !stat(path, &st); | |
28 | } | |
29 | ||
30 | /* return true if 'path' exists and it is a directory, false otherwise */ | |
31 | static bool is_dir(const char *path) | |
32 | { | |
33 | struct stat st; | |
34 | ||
35 | if (stat(path, &st)) | |
a69b191f | 36 | return false; |
0608182a MY |
37 | |
38 | return S_ISDIR(st.st_mode); | |
39 | } | |
40 | ||
67424f61 MY |
41 | /* return true if the given two files are the same, false otherwise */ |
42 | static bool is_same(const char *file1, const char *file2) | |
43 | { | |
44 | int fd1, fd2; | |
45 | struct stat st1, st2; | |
46 | void *map1, *map2; | |
47 | bool ret = false; | |
48 | ||
49 | fd1 = open(file1, O_RDONLY); | |
50 | if (fd1 < 0) | |
51 | return ret; | |
52 | ||
53 | fd2 = open(file2, O_RDONLY); | |
54 | if (fd2 < 0) | |
55 | goto close1; | |
56 | ||
57 | ret = fstat(fd1, &st1); | |
58 | if (ret) | |
59 | goto close2; | |
60 | ret = fstat(fd2, &st2); | |
61 | if (ret) | |
62 | goto close2; | |
63 | ||
64 | if (st1.st_size != st2.st_size) | |
65 | goto close2; | |
66 | ||
67 | map1 = mmap(NULL, st1.st_size, PROT_READ, MAP_PRIVATE, fd1, 0); | |
68 | if (map1 == MAP_FAILED) | |
69 | goto close2; | |
70 | ||
71 | map2 = mmap(NULL, st2.st_size, PROT_READ, MAP_PRIVATE, fd2, 0); | |
72 | if (map2 == MAP_FAILED) | |
73 | goto close2; | |
74 | ||
75 | if (bcmp(map1, map2, st1.st_size)) | |
76 | goto close2; | |
77 | ||
78 | ret = true; | |
79 | close2: | |
80 | close(fd2); | |
81 | close1: | |
82 | close(fd1); | |
83 | ||
84 | return ret; | |
85 | } | |
86 | ||
0608182a MY |
87 | /* |
88 | * Create the parent directory of the given path. | |
89 | * | |
90 | * For example, if 'include/config/auto.conf' is given, create 'include/config'. | |
91 | */ | |
92 | static int make_parent_dir(const char *path) | |
93 | { | |
94 | char tmp[PATH_MAX + 1]; | |
95 | char *p; | |
96 | ||
97 | strncpy(tmp, path, sizeof(tmp)); | |
98 | tmp[sizeof(tmp) - 1] = 0; | |
99 | ||
100 | /* Remove the base name. Just return if nothing is left */ | |
101 | p = strrchr(tmp, '/'); | |
102 | if (!p) | |
103 | return 0; | |
104 | *(p + 1) = 0; | |
105 | ||
106 | /* Just in case it is an absolute path */ | |
107 | p = tmp; | |
108 | while (*p == '/') | |
109 | p++; | |
110 | ||
111 | while ((p = strchr(p, '/'))) { | |
112 | *p = 0; | |
113 | ||
114 | /* skip if the directory exists */ | |
115 | if (!is_dir(tmp) && mkdir(tmp, 0755)) | |
116 | return -1; | |
117 | ||
118 | *p = '/'; | |
119 | while (*p == '/') | |
120 | p++; | |
121 | } | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
1508fec8 MY |
126 | static char depfile_path[PATH_MAX]; |
127 | static size_t depfile_prefix_len; | |
128 | ||
129 | /* touch depfile for symbol 'name' */ | |
130 | static int conf_touch_dep(const char *name) | |
131 | { | |
132 | int fd, ret; | |
0e0345b7 | 133 | char *d; |
1508fec8 | 134 | |
0e0345b7 AD |
135 | /* check overflow: prefix + name + '\0' must fit in buffer. */ |
136 | if (depfile_prefix_len + strlen(name) + 1 > sizeof(depfile_path)) | |
1508fec8 MY |
137 | return -1; |
138 | ||
139 | d = depfile_path + depfile_prefix_len; | |
0e0345b7 | 140 | strcpy(d, name); |
1508fec8 MY |
141 | |
142 | /* Assume directory path already exists. */ | |
143 | fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); | |
144 | if (fd == -1) { | |
145 | if (errno != ENOENT) | |
146 | return -1; | |
147 | ||
148 | ret = make_parent_dir(depfile_path); | |
149 | if (ret) | |
150 | return ret; | |
151 | ||
152 | /* Try it again. */ | |
153 | fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); | |
154 | if (fd == -1) | |
155 | return -1; | |
156 | } | |
157 | close(fd); | |
158 | ||
159 | return 0; | |
160 | } | |
161 | ||
ad8d40cd MM |
162 | struct conf_printer { |
163 | void (*print_symbol)(FILE *, struct symbol *, const char *, void *); | |
164 | void (*print_comment)(FILE *, const char *, void *); | |
165 | }; | |
166 | ||
c1a0f5e3 RZ |
167 | static void conf_warning(const char *fmt, ...) |
168 | __attribute__ ((format (printf, 1, 2))); | |
169 | ||
42368c37 MM |
170 | static void conf_message(const char *fmt, ...) |
171 | __attribute__ ((format (printf, 1, 2))); | |
172 | ||
c1a0f5e3 | 173 | static const char *conf_filename; |
84dd95d4 | 174 | static int conf_lineno, conf_warnings; |
c1a0f5e3 | 175 | |
c1a0f5e3 RZ |
176 | static void conf_warning(const char *fmt, ...) |
177 | { | |
178 | va_list ap; | |
179 | va_start(ap, fmt); | |
180 | fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno); | |
181 | vfprintf(stderr, fmt, ap); | |
182 | fprintf(stderr, "\n"); | |
183 | va_end(ap); | |
184 | conf_warnings++; | |
185 | } | |
186 | ||
5accd7f3 | 187 | static void conf_default_message_callback(const char *s) |
42368c37 MM |
188 | { |
189 | printf("#\n# "); | |
5accd7f3 | 190 | printf("%s", s); |
42368c37 MM |
191 | printf("\n#\n"); |
192 | } | |
193 | ||
5accd7f3 | 194 | static void (*conf_message_callback)(const char *s) = |
42368c37 | 195 | conf_default_message_callback; |
5accd7f3 | 196 | void conf_set_message_callback(void (*fn)(const char *s)) |
42368c37 MM |
197 | { |
198 | conf_message_callback = fn; | |
199 | } | |
200 | ||
201 | static void conf_message(const char *fmt, ...) | |
202 | { | |
203 | va_list ap; | |
5accd7f3 MY |
204 | char buf[4096]; |
205 | ||
206 | if (!conf_message_callback) | |
207 | return; | |
42368c37 MM |
208 | |
209 | va_start(ap, fmt); | |
5accd7f3 MY |
210 | |
211 | vsnprintf(buf, sizeof(buf), fmt, ap); | |
212 | conf_message_callback(buf); | |
b6a2ab2c | 213 | va_end(ap); |
42368c37 MM |
214 | } |
215 | ||
14cdd3c4 RZ |
216 | const char *conf_get_configname(void) |
217 | { | |
218 | char *name = getenv("KCONFIG_CONFIG"); | |
219 | ||
220 | return name ? name : ".config"; | |
221 | } | |
222 | ||
9b9f5948 | 223 | static const char *conf_get_autoconfig_name(void) |
12122f62 MH |
224 | { |
225 | char *name = getenv("KCONFIG_AUTOCONFIG"); | |
226 | ||
227 | return name ? name : "include/config/auto.conf"; | |
228 | } | |
229 | ||
9c900a9c SR |
230 | static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p) |
231 | { | |
232 | char *p2; | |
233 | ||
234 | switch (sym->type) { | |
235 | case S_TRISTATE: | |
236 | if (p[0] == 'm') { | |
237 | sym->def[def].tri = mod; | |
238 | sym->flags |= def_flags; | |
239 | break; | |
240 | } | |
d8fc3200 | 241 | /* fall through */ |
9c900a9c SR |
242 | case S_BOOLEAN: |
243 | if (p[0] == 'y') { | |
244 | sym->def[def].tri = yes; | |
245 | sym->flags |= def_flags; | |
246 | break; | |
247 | } | |
248 | if (p[0] == 'n') { | |
249 | sym->def[def].tri = no; | |
250 | sym->flags |= def_flags; | |
251 | break; | |
252 | } | |
04b19b77 YM |
253 | if (def != S_DEF_AUTO) |
254 | conf_warning("symbol value '%s' invalid for %s", | |
255 | p, sym->name); | |
75f1468b | 256 | return 1; |
9c900a9c SR |
257 | case S_STRING: |
258 | if (*p++ != '"') | |
259 | break; | |
260 | for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) { | |
261 | if (*p2 == '"') { | |
262 | *p2 = 0; | |
263 | break; | |
264 | } | |
265 | memmove(p2, p2 + 1, strlen(p2)); | |
266 | } | |
267 | if (!p2) { | |
04b19b77 YM |
268 | if (def != S_DEF_AUTO) |
269 | conf_warning("invalid string found"); | |
9c900a9c SR |
270 | return 1; |
271 | } | |
d8fc3200 | 272 | /* fall through */ |
9c900a9c SR |
273 | case S_INT: |
274 | case S_HEX: | |
9c900a9c | 275 | if (sym_string_valid(sym, p)) { |
cd81fc82 | 276 | sym->def[def].val = xstrdup(p); |
9c900a9c SR |
277 | sym->flags |= def_flags; |
278 | } else { | |
04b19b77 YM |
279 | if (def != S_DEF_AUTO) |
280 | conf_warning("symbol value '%s' invalid for %s", | |
281 | p, sym->name); | |
9c900a9c SR |
282 | return 1; |
283 | } | |
284 | break; | |
285 | default: | |
286 | ; | |
287 | } | |
288 | return 0; | |
289 | } | |
290 | ||
1a7a8c6f CS |
291 | #define LINE_GROWTH 16 |
292 | static int add_byte(int c, char **lineptr, size_t slen, size_t *n) | |
293 | { | |
294 | char *nline; | |
295 | size_t new_size = slen + 1; | |
296 | if (new_size > *n) { | |
297 | new_size += LINE_GROWTH - 1; | |
298 | new_size *= 2; | |
d717f24d | 299 | nline = xrealloc(*lineptr, new_size); |
1a7a8c6f CS |
300 | if (!nline) |
301 | return -1; | |
302 | ||
303 | *lineptr = nline; | |
304 | *n = new_size; | |
305 | } | |
306 | ||
307 | (*lineptr)[slen] = c; | |
308 | ||
309 | return 0; | |
310 | } | |
311 | ||
312 | static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream) | |
313 | { | |
314 | char *line = *lineptr; | |
315 | size_t slen = 0; | |
316 | ||
317 | for (;;) { | |
318 | int c = getc(stream); | |
319 | ||
320 | switch (c) { | |
321 | case '\n': | |
322 | if (add_byte(c, &line, slen, n) < 0) | |
323 | goto e_out; | |
324 | slen++; | |
325 | /* fall through */ | |
326 | case EOF: | |
327 | if (add_byte('\0', &line, slen, n) < 0) | |
328 | goto e_out; | |
329 | *lineptr = line; | |
330 | if (slen == 0) | |
331 | return -1; | |
332 | return slen; | |
333 | default: | |
334 | if (add_byte(c, &line, slen, n) < 0) | |
335 | goto e_out; | |
336 | slen++; | |
337 | } | |
338 | } | |
339 | ||
340 | e_out: | |
341 | line[slen-1] = '\0'; | |
342 | *lineptr = line; | |
343 | return -1; | |
344 | } | |
345 | ||
669bfad9 | 346 | int conf_read_simple(const char *name, int def) |
1da177e4 LT |
347 | { |
348 | FILE *in = NULL; | |
1a7a8c6f CS |
349 | char *line = NULL; |
350 | size_t line_asize = 0; | |
1da177e4 | 351 | char *p, *p2; |
1da177e4 | 352 | struct symbol *sym; |
669bfad9 | 353 | int i, def_flags; |
1da177e4 LT |
354 | |
355 | if (name) { | |
356 | in = zconf_fopen(name); | |
357 | } else { | |
b75b0a81 | 358 | char *env; |
face4374 | 359 | |
14cdd3c4 | 360 | name = conf_get_configname(); |
ddc97cac RZ |
361 | in = zconf_fopen(name); |
362 | if (in) | |
363 | goto load; | |
5ee54659 | 364 | conf_set_changed(true); |
b75b0a81 MY |
365 | |
366 | env = getenv("KCONFIG_DEFCONFIG_LIST"); | |
367 | if (!env) | |
face4374 RZ |
368 | return 1; |
369 | ||
b75b0a81 MY |
370 | while (1) { |
371 | bool is_last; | |
372 | ||
373 | while (isspace(*env)) | |
374 | env++; | |
375 | ||
376 | if (!*env) | |
377 | break; | |
378 | ||
379 | p = env; | |
380 | while (*p && !isspace(*p)) | |
381 | p++; | |
382 | ||
383 | is_last = (*p == '\0'); | |
384 | ||
385 | *p = '\0'; | |
386 | ||
387 | in = zconf_fopen(env); | |
1da177e4 | 388 | if (in) { |
694c49a7 | 389 | conf_message("using defaults found in %s", |
b75b0a81 | 390 | env); |
ddc97cac | 391 | goto load; |
1da177e4 | 392 | } |
b75b0a81 MY |
393 | |
394 | if (is_last) | |
395 | break; | |
396 | ||
397 | env = p + 1; | |
1da177e4 LT |
398 | } |
399 | } | |
1da177e4 LT |
400 | if (!in) |
401 | return 1; | |
402 | ||
ddc97cac | 403 | load: |
c1a0f5e3 RZ |
404 | conf_filename = name; |
405 | conf_lineno = 0; | |
406 | conf_warnings = 0; | |
c1a0f5e3 | 407 | |
669bfad9 | 408 | def_flags = SYMBOL_DEF << def; |
1da177e4 | 409 | for_all_symbols(i, sym) { |
669bfad9 RZ |
410 | sym->flags |= SYMBOL_CHANGED; |
411 | sym->flags &= ~(def_flags|SYMBOL_VALID); | |
490f1617 YM |
412 | if (sym_is_choice(sym)) |
413 | sym->flags |= def_flags; | |
1da177e4 LT |
414 | switch (sym->type) { |
415 | case S_INT: | |
416 | case S_HEX: | |
417 | case S_STRING: | |
669bfad9 RZ |
418 | if (sym->def[def].val) |
419 | free(sym->def[def].val); | |
d8fc3200 | 420 | /* fall through */ |
1da177e4 | 421 | default: |
669bfad9 RZ |
422 | sym->def[def].val = NULL; |
423 | sym->def[def].tri = no; | |
1da177e4 LT |
424 | } |
425 | } | |
426 | ||
1a7a8c6f | 427 | while (compat_getline(&line, &line_asize, in) != -1) { |
c1a0f5e3 | 428 | conf_lineno++; |
1da177e4 | 429 | sym = NULL; |
8baefd30 | 430 | if (line[0] == '#') { |
ffb5957b | 431 | if (memcmp(line + 2, CONFIG_, strlen(CONFIG_))) |
1da177e4 | 432 | continue; |
ffb5957b | 433 | p = strchr(line + 2 + strlen(CONFIG_), ' '); |
1da177e4 LT |
434 | if (!p) |
435 | continue; | |
436 | *p++ = 0; | |
437 | if (strncmp(p, "is not set", 10)) | |
438 | continue; | |
669bfad9 | 439 | if (def == S_DEF_USER) { |
ffb5957b | 440 | sym = sym_find(line + 2 + strlen(CONFIG_)); |
661b0680 | 441 | if (!sym) { |
5ee54659 | 442 | conf_set_changed(true); |
75889e9b | 443 | continue; |
661b0680 | 444 | } |
669bfad9 | 445 | } else { |
ffb5957b | 446 | sym = sym_lookup(line + 2 + strlen(CONFIG_), 0); |
669bfad9 RZ |
447 | if (sym->type == S_UNKNOWN) |
448 | sym->type = S_BOOLEAN; | |
449 | } | |
450 | if (sym->flags & def_flags) { | |
d84876f9 | 451 | conf_warning("override: reassigning to symbol %s", sym->name); |
1da177e4 LT |
452 | } |
453 | switch (sym->type) { | |
454 | case S_BOOLEAN: | |
455 | case S_TRISTATE: | |
669bfad9 RZ |
456 | sym->def[def].tri = no; |
457 | sym->flags |= def_flags; | |
1da177e4 LT |
458 | break; |
459 | default: | |
460 | ; | |
461 | } | |
ffb5957b AL |
462 | } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) { |
463 | p = strchr(line + strlen(CONFIG_), '='); | |
1da177e4 LT |
464 | if (!p) |
465 | continue; | |
466 | *p++ = 0; | |
467 | p2 = strchr(p, '\n'); | |
d3660a8c MW |
468 | if (p2) { |
469 | *p2-- = 0; | |
470 | if (*p2 == '\r') | |
471 | *p2 = 0; | |
472 | } | |
2aabbed6 MY |
473 | |
474 | sym = sym_find(line + strlen(CONFIG_)); | |
475 | if (!sym) { | |
476 | if (def == S_DEF_AUTO) | |
477 | /* | |
478 | * Reading from include/config/auto.conf | |
479 | * If CONFIG_FOO previously existed in | |
480 | * auto.conf but it is missing now, | |
0e0345b7 | 481 | * include/config/FOO must be touched. |
2aabbed6 MY |
482 | */ |
483 | conf_touch_dep(line + strlen(CONFIG_)); | |
484 | else | |
5ee54659 | 485 | conf_set_changed(true); |
2aabbed6 | 486 | continue; |
669bfad9 | 487 | } |
2aabbed6 | 488 | |
669bfad9 | 489 | if (sym->flags & def_flags) { |
d84876f9 | 490 | conf_warning("override: reassigning to symbol %s", sym->name); |
1da177e4 | 491 | } |
9c900a9c SR |
492 | if (conf_set_sym_val(sym, def, def_flags, p)) |
493 | continue; | |
8baefd30 AL |
494 | } else { |
495 | if (line[0] != '\r' && line[0] != '\n') | |
a4663911 PB |
496 | conf_warning("unexpected data: %.*s", |
497 | (int)strcspn(line, "\r\n"), line); | |
498 | ||
1da177e4 LT |
499 | continue; |
500 | } | |
75889e9b | 501 | |
1da177e4 LT |
502 | if (sym && sym_is_choice_value(sym)) { |
503 | struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); | |
669bfad9 | 504 | switch (sym->def[def].tri) { |
1da177e4 LT |
505 | case no: |
506 | break; | |
507 | case mod: | |
669bfad9 | 508 | if (cs->def[def].tri == yes) { |
c1a0f5e3 | 509 | conf_warning("%s creates inconsistent choice state", sym->name); |
490f1617 | 510 | cs->flags &= ~def_flags; |
c1a0f5e3 | 511 | } |
1da177e4 LT |
512 | break; |
513 | case yes: | |
d84876f9 JE |
514 | if (cs->def[def].tri != no) |
515 | conf_warning("override: %s changes choice state", sym->name); | |
516 | cs->def[def].val = sym; | |
1da177e4 LT |
517 | break; |
518 | } | |
d6ee3576 | 519 | cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri); |
1da177e4 LT |
520 | } |
521 | } | |
1a7a8c6f | 522 | free(line); |
1da177e4 | 523 | fclose(in); |
90389160 RZ |
524 | return 0; |
525 | } | |
526 | ||
527 | int conf_read(const char *name) | |
528 | { | |
5d09598d | 529 | struct symbol *sym; |
84dd95d4 | 530 | int conf_unsaved = 0; |
5d09598d | 531 | int i; |
90389160 | 532 | |
5ee54659 | 533 | conf_set_changed(false); |
ddc97cac | 534 | |
6b87b70c AV |
535 | if (conf_read_simple(name, S_DEF_USER)) { |
536 | sym_calc_value(modules_sym); | |
90389160 | 537 | return 1; |
6b87b70c AV |
538 | } |
539 | ||
540 | sym_calc_value(modules_sym); | |
90389160 | 541 | |
1da177e4 LT |
542 | for_all_symbols(i, sym) { |
543 | sym_calc_value(sym); | |
693359f7 | 544 | if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE)) |
5d09598d | 545 | continue; |
c1a0f5e3 RZ |
546 | if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { |
547 | /* check that calculated value agrees with saved value */ | |
548 | switch (sym->type) { | |
549 | case S_BOOLEAN: | |
550 | case S_TRISTATE: | |
e3cd5136 | 551 | if (sym->def[S_DEF_USER].tri == sym_get_tristate_value(sym)) |
5d09598d | 552 | continue; |
e3cd5136 | 553 | break; |
c1a0f5e3 | 554 | default: |
0c1822e6 | 555 | if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val)) |
5d09598d | 556 | continue; |
c1a0f5e3 RZ |
557 | break; |
558 | } | |
559 | } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE)) | |
560 | /* no previous value and not saved */ | |
5d09598d | 561 | continue; |
c1a0f5e3 RZ |
562 | conf_unsaved++; |
563 | /* maybe print value in verbose mode... */ | |
d8982ba1 RZ |
564 | } |
565 | ||
566 | for_all_symbols(i, sym) { | |
1da177e4 | 567 | if (sym_has_value(sym) && !sym_is_choice_value(sym)) { |
d8982ba1 RZ |
568 | /* Reset values of generates values, so they'll appear |
569 | * as new, if they should become visible, but that | |
570 | * doesn't quite work if the Kconfig and the saved | |
571 | * configuration disagree. | |
572 | */ | |
573 | if (sym->visible == no && !conf_unsaved) | |
669bfad9 | 574 | sym->flags &= ~SYMBOL_DEF_USER; |
1da177e4 LT |
575 | switch (sym->type) { |
576 | case S_STRING: | |
577 | case S_INT: | |
578 | case S_HEX: | |
d8982ba1 RZ |
579 | /* Reset a string value if it's out of range */ |
580 | if (sym_string_within_range(sym, sym->def[S_DEF_USER].val)) | |
581 | break; | |
582 | sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER); | |
583 | conf_unsaved++; | |
584 | break; | |
1da177e4 LT |
585 | default: |
586 | break; | |
587 | } | |
588 | } | |
1da177e4 LT |
589 | } |
590 | ||
5ee54659 MY |
591 | if (conf_warnings || conf_unsaved) |
592 | conf_set_changed(true); | |
1da177e4 LT |
593 | |
594 | return 0; | |
595 | } | |
596 | ||
e54e692b AL |
597 | /* |
598 | * Kconfig configuration printer | |
599 | * | |
600 | * This printer is used when generating the resulting configuration after | |
601 | * kconfig invocation and `defconfig' files. Unset symbol might be omitted by | |
602 | * passing a non-NULL argument to the printer. | |
603 | * | |
604 | */ | |
605 | static void | |
606 | kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) | |
607 | { | |
608 | ||
609 | switch (sym->type) { | |
610 | case S_BOOLEAN: | |
611 | case S_TRISTATE: | |
612 | if (*value == 'n') { | |
613 | bool skip_unset = (arg != NULL); | |
614 | ||
615 | if (!skip_unset) | |
616 | fprintf(fp, "# %s%s is not set\n", | |
617 | CONFIG_, sym->name); | |
618 | return; | |
619 | } | |
620 | break; | |
621 | default: | |
622 | break; | |
623 | } | |
624 | ||
625 | fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value); | |
626 | } | |
627 | ||
628 | static void | |
629 | kconfig_print_comment(FILE *fp, const char *value, void *arg) | |
49192f26 | 630 | { |
e54e692b AL |
631 | const char *p = value; |
632 | size_t l; | |
633 | ||
634 | for (;;) { | |
635 | l = strcspn(p, "\n"); | |
636 | fprintf(fp, "#"); | |
49192f26 | 637 | if (l) { |
e54e692b | 638 | fprintf(fp, " "); |
70cc01e7 | 639 | xfwrite(p, l, 1, fp); |
e54e692b | 640 | p += l; |
49192f26 | 641 | } |
e54e692b AL |
642 | fprintf(fp, "\n"); |
643 | if (*p++ == '\0') | |
49192f26 | 644 | break; |
49192f26 | 645 | } |
49192f26 SR |
646 | } |
647 | ||
e54e692b | 648 | static struct conf_printer kconfig_printer_cb = |
49192f26 | 649 | { |
e54e692b AL |
650 | .print_symbol = kconfig_print_symbol, |
651 | .print_comment = kconfig_print_comment, | |
652 | }; | |
653 | ||
654 | /* | |
655 | * Header printer | |
656 | * | |
657 | * This printer is used when generating the `include/generated/autoconf.h' file. | |
658 | */ | |
659 | static void | |
660 | header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) | |
661 | { | |
49192f26 | 662 | |
0dce6310 | 663 | switch (sym->type) { |
49192f26 | 664 | case S_BOOLEAN: |
eb4cf5a6 AL |
665 | case S_TRISTATE: { |
666 | const char *suffix = ""; | |
667 | ||
e54e692b AL |
668 | switch (*value) { |
669 | case 'n': | |
2a11c8ea | 670 | break; |
e54e692b AL |
671 | case 'm': |
672 | suffix = "_MODULE"; | |
eb4cf5a6 | 673 | /* fall through */ |
e54e692b | 674 | default: |
2a11c8ea MM |
675 | fprintf(fp, "#define %s%s%s 1\n", |
676 | CONFIG_, sym->name, suffix); | |
49192f26 | 677 | } |
eb4cf5a6 AL |
678 | break; |
679 | } | |
680 | case S_HEX: { | |
681 | const char *prefix = ""; | |
682 | ||
683 | if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X')) | |
684 | prefix = "0x"; | |
685 | fprintf(fp, "#define %s%s %s%s\n", | |
686 | CONFIG_, sym->name, prefix, value); | |
687 | break; | |
688 | } | |
689 | case S_STRING: | |
690 | case S_INT: | |
691 | fprintf(fp, "#define %s%s %s\n", | |
692 | CONFIG_, sym->name, value); | |
49192f26 | 693 | break; |
e54e692b | 694 | default: |
49192f26 | 695 | break; |
e54e692b AL |
696 | } |
697 | ||
e54e692b AL |
698 | } |
699 | ||
700 | static void | |
701 | header_print_comment(FILE *fp, const char *value, void *arg) | |
702 | { | |
703 | const char *p = value; | |
704 | size_t l; | |
705 | ||
706 | fprintf(fp, "/*\n"); | |
707 | for (;;) { | |
708 | l = strcspn(p, "\n"); | |
709 | fprintf(fp, " *"); | |
710 | if (l) { | |
711 | fprintf(fp, " "); | |
70cc01e7 | 712 | xfwrite(p, l, 1, fp); |
e54e692b AL |
713 | p += l; |
714 | } | |
715 | fprintf(fp, "\n"); | |
716 | if (*p++ == '\0') | |
717 | break; | |
718 | } | |
719 | fprintf(fp, " */\n"); | |
720 | } | |
721 | ||
722 | static struct conf_printer header_printer_cb = | |
723 | { | |
724 | .print_symbol = header_print_symbol, | |
725 | .print_comment = header_print_comment, | |
726 | }; | |
727 | ||
e54e692b AL |
728 | static void conf_write_symbol(FILE *fp, struct symbol *sym, |
729 | struct conf_printer *printer, void *printer_arg) | |
730 | { | |
731 | const char *str; | |
732 | ||
733 | switch (sym->type) { | |
49192f26 SR |
734 | case S_UNKNOWN: |
735 | break; | |
e54e692b AL |
736 | case S_STRING: |
737 | str = sym_get_string_value(sym); | |
738 | str = sym_escape_string_value(str); | |
739 | printer->print_symbol(fp, sym, str, printer_arg); | |
740 | free((void *)str); | |
741 | break; | |
742 | default: | |
743 | str = sym_get_string_value(sym); | |
744 | printer->print_symbol(fp, sym, str, printer_arg); | |
49192f26 SR |
745 | } |
746 | } | |
747 | ||
e54e692b AL |
748 | static void |
749 | conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg) | |
750 | { | |
751 | char buf[256]; | |
752 | ||
753 | snprintf(buf, sizeof(buf), | |
754 | "\n" | |
755 | "Automatically generated file; DO NOT EDIT.\n" | |
756 | "%s\n", | |
757 | rootmenu.prompt->text); | |
758 | ||
759 | printer->print_comment(fp, buf, printer_arg); | |
760 | } | |
761 | ||
7cf3d73b SR |
762 | /* |
763 | * Write out a minimal config. | |
764 | * All values that has default values are skipped as this is redundant. | |
765 | */ | |
766 | int conf_write_defconfig(const char *filename) | |
767 | { | |
768 | struct symbol *sym; | |
769 | struct menu *menu; | |
770 | FILE *out; | |
771 | ||
772 | out = fopen(filename, "w"); | |
773 | if (!out) | |
774 | return 1; | |
775 | ||
776 | sym_clear_all_valid(); | |
777 | ||
778 | /* Traverse all menus to find all relevant symbols */ | |
779 | menu = rootmenu.list; | |
780 | ||
781 | while (menu != NULL) | |
782 | { | |
783 | sym = menu->sym; | |
784 | if (sym == NULL) { | |
785 | if (!menu_is_visible(menu)) | |
786 | goto next_menu; | |
787 | } else if (!sym_is_choice(sym)) { | |
788 | sym_calc_value(sym); | |
789 | if (!(sym->flags & SYMBOL_WRITE)) | |
790 | goto next_menu; | |
791 | sym->flags &= ~SYMBOL_WRITE; | |
792 | /* If we cannot change the symbol - skip */ | |
baa23ec8 | 793 | if (!sym_is_changeable(sym)) |
7cf3d73b SR |
794 | goto next_menu; |
795 | /* If symbol equals to default value - skip */ | |
796 | if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0) | |
797 | goto next_menu; | |
798 | ||
799 | /* | |
800 | * If symbol is a choice value and equals to the | |
801 | * default for a choice - skip. | |
84062dd3 SR |
802 | * But only if value is bool and equal to "y" and |
803 | * choice is not "optional". | |
804 | * (If choice is "optional" then all values can be "n") | |
7cf3d73b SR |
805 | */ |
806 | if (sym_is_choice_value(sym)) { | |
807 | struct symbol *cs; | |
808 | struct symbol *ds; | |
809 | ||
810 | cs = prop_get_symbol(sym_get_choice_prop(sym)); | |
811 | ds = sym_choice_default(cs); | |
84062dd3 | 812 | if (!sym_is_optional(cs) && sym == ds) { |
801690ca SR |
813 | if ((sym->type == S_BOOLEAN) && |
814 | sym_get_tristate_value(sym) == yes) | |
7cf3d73b SR |
815 | goto next_menu; |
816 | } | |
817 | } | |
e54e692b | 818 | conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); |
7cf3d73b SR |
819 | } |
820 | next_menu: | |
821 | if (menu->list != NULL) { | |
822 | menu = menu->list; | |
823 | } | |
824 | else if (menu->next != NULL) { | |
825 | menu = menu->next; | |
826 | } else { | |
827 | while ((menu = menu->parent)) { | |
828 | if (menu->next != NULL) { | |
829 | menu = menu->next; | |
830 | break; | |
831 | } | |
832 | } | |
833 | } | |
834 | } | |
835 | fclose(out); | |
836 | return 0; | |
837 | } | |
838 | ||
1da177e4 LT |
839 | int conf_write(const char *name) |
840 | { | |
c955ccaf | 841 | FILE *out; |
1da177e4 LT |
842 | struct symbol *sym; |
843 | struct menu *menu; | |
1da177e4 | 844 | const char *str; |
ceb7f329 | 845 | char tmpname[PATH_MAX + 1], oldname[PATH_MAX + 1]; |
1da177e4 | 846 | char *env; |
0c5b6c28 | 847 | int i; |
aff11cd9 | 848 | bool need_newline = false; |
1da177e4 | 849 | |
ceb7f329 MY |
850 | if (!name) |
851 | name = conf_get_configname(); | |
852 | ||
853 | if (!*name) { | |
854 | fprintf(stderr, "config name is empty\n"); | |
855 | return -1; | |
856 | } | |
857 | ||
858 | if (is_dir(name)) { | |
859 | fprintf(stderr, "%s: Is a directory\n", name); | |
860 | return -1; | |
861 | } | |
862 | ||
580c5b3e MY |
863 | if (make_parent_dir(name)) |
864 | return -1; | |
865 | ||
14cdd3c4 | 866 | env = getenv("KCONFIG_OVERWRITECONFIG"); |
ceb7f329 | 867 | if (env && *env) { |
14cdd3c4 | 868 | *tmpname = 0; |
ceb7f329 MY |
869 | out = fopen(name, "w"); |
870 | } else { | |
871 | snprintf(tmpname, sizeof(tmpname), "%s.%d.tmp", | |
872 | name, (int)getpid()); | |
873 | out = fopen(tmpname, "w"); | |
14cdd3c4 | 874 | } |
1da177e4 LT |
875 | if (!out) |
876 | return 1; | |
14cdd3c4 | 877 | |
e54e692b | 878 | conf_write_heading(out, &kconfig_printer_cb, NULL); |
1da177e4 | 879 | |
b3214293 | 880 | if (!conf_get_changed()) |
1da177e4 LT |
881 | sym_clear_all_valid(); |
882 | ||
883 | menu = rootmenu.list; | |
884 | while (menu) { | |
885 | sym = menu->sym; | |
886 | if (!sym) { | |
887 | if (!menu_is_visible(menu)) | |
888 | goto next; | |
889 | str = menu_get_prompt(menu); | |
890 | fprintf(out, "\n" | |
891 | "#\n" | |
892 | "# %s\n" | |
893 | "#\n", str); | |
aff11cd9 | 894 | need_newline = false; |
8e2442a5 MY |
895 | } else if (!(sym->flags & SYMBOL_CHOICE) && |
896 | !(sym->flags & SYMBOL_WRITTEN)) { | |
1da177e4 LT |
897 | sym_calc_value(sym); |
898 | if (!(sym->flags & SYMBOL_WRITE)) | |
899 | goto next; | |
aff11cd9 AP |
900 | if (need_newline) { |
901 | fprintf(out, "\n"); | |
902 | need_newline = false; | |
903 | } | |
8e2442a5 | 904 | sym->flags |= SYMBOL_WRITTEN; |
e54e692b | 905 | conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); |
1da177e4 LT |
906 | } |
907 | ||
49192f26 | 908 | next: |
1da177e4 LT |
909 | if (menu->list) { |
910 | menu = menu->list; | |
911 | continue; | |
912 | } | |
913 | if (menu->next) | |
914 | menu = menu->next; | |
915 | else while ((menu = menu->parent)) { | |
aff11cd9 AP |
916 | if (!menu->sym && menu_is_visible(menu) && |
917 | menu != &rootmenu) { | |
918 | str = menu_get_prompt(menu); | |
919 | fprintf(out, "# end of %s\n", str); | |
920 | need_newline = true; | |
921 | } | |
1da177e4 LT |
922 | if (menu->next) { |
923 | menu = menu->next; | |
924 | break; | |
925 | } | |
926 | } | |
927 | } | |
928 | fclose(out); | |
14cdd3c4 | 929 | |
0c5b6c28 VB |
930 | for_all_symbols(i, sym) |
931 | sym->flags &= ~SYMBOL_WRITTEN; | |
932 | ||
14cdd3c4 | 933 | if (*tmpname) { |
67424f61 MY |
934 | if (is_same(name, tmpname)) { |
935 | conf_message("No change to %s", name); | |
936 | unlink(tmpname); | |
5ee54659 | 937 | conf_set_changed(false); |
67424f61 MY |
938 | return 0; |
939 | } | |
940 | ||
ceb7f329 MY |
941 | snprintf(oldname, sizeof(oldname), "%s.old", name); |
942 | rename(name, oldname); | |
943 | if (rename(tmpname, name)) | |
14cdd3c4 | 944 | return 1; |
1da177e4 | 945 | } |
1da177e4 | 946 | |
ceb7f329 | 947 | conf_message("configuration written to %s", name); |
ddc97cac | 948 | |
5ee54659 | 949 | conf_set_changed(false); |
1da177e4 LT |
950 | |
951 | return 0; | |
952 | } | |
c955ccaf | 953 | |
a2ff4040 MY |
954 | /* write a dependency file as used by kbuild to track dependencies */ |
955 | static int conf_write_dep(const char *name) | |
956 | { | |
957 | struct file *file; | |
958 | FILE *out; | |
959 | ||
a2ff4040 MY |
960 | out = fopen("..config.tmp", "w"); |
961 | if (!out) | |
962 | return 1; | |
963 | fprintf(out, "deps_config := \\\n"); | |
964 | for (file = file_list; file; file = file->next) { | |
965 | if (file->next) | |
966 | fprintf(out, "\t%s \\\n", file->name); | |
967 | else | |
968 | fprintf(out, "\t%s\n", file->name); | |
969 | } | |
970 | fprintf(out, "\n%s: \\\n" | |
971 | "\t$(deps_config)\n\n", conf_get_autoconfig_name()); | |
972 | ||
973 | env_write_dep(out, conf_get_autoconfig_name()); | |
974 | ||
975 | fprintf(out, "\n$(deps_config): ;\n"); | |
976 | fclose(out); | |
79123b13 MY |
977 | |
978 | if (make_parent_dir(name)) | |
979 | return 1; | |
a2ff4040 MY |
980 | rename("..config.tmp", name); |
981 | return 0; | |
982 | } | |
983 | ||
0849d212 | 984 | static int conf_touch_deps(void) |
2e3646e5 | 985 | { |
12122f62 | 986 | const char *name; |
2e3646e5 | 987 | struct symbol *sym; |
1508fec8 MY |
988 | int res, i; |
989 | ||
990 | strcpy(depfile_path, "include/config/"); | |
991 | depfile_prefix_len = strlen(depfile_path); | |
2e3646e5 | 992 | |
12122f62 | 993 | name = conf_get_autoconfig_name(); |
2e3646e5 | 994 | conf_read_simple(name, S_DEF_AUTO); |
6b87b70c | 995 | sym_calc_value(modules_sym); |
2e3646e5 | 996 | |
2e3646e5 RZ |
997 | for_all_symbols(i, sym) { |
998 | sym_calc_value(sym); | |
693359f7 | 999 | if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name) |
2e3646e5 RZ |
1000 | continue; |
1001 | if (sym->flags & SYMBOL_WRITE) { | |
1002 | if (sym->flags & SYMBOL_DEF_AUTO) { | |
1003 | /* | |
1004 | * symbol has old and new value, | |
1005 | * so compare them... | |
1006 | */ | |
1007 | switch (sym->type) { | |
1008 | case S_BOOLEAN: | |
1009 | case S_TRISTATE: | |
1010 | if (sym_get_tristate_value(sym) == | |
1011 | sym->def[S_DEF_AUTO].tri) | |
1012 | continue; | |
1013 | break; | |
1014 | case S_STRING: | |
1015 | case S_HEX: | |
1016 | case S_INT: | |
1017 | if (!strcmp(sym_get_string_value(sym), | |
1018 | sym->def[S_DEF_AUTO].val)) | |
1019 | continue; | |
1020 | break; | |
1021 | default: | |
1022 | break; | |
1023 | } | |
1024 | } else { | |
1025 | /* | |
1026 | * If there is no old value, only 'no' (unset) | |
1027 | * is allowed as new value. | |
1028 | */ | |
1029 | switch (sym->type) { | |
1030 | case S_BOOLEAN: | |
1031 | case S_TRISTATE: | |
1032 | if (sym_get_tristate_value(sym) == no) | |
1033 | continue; | |
1034 | break; | |
1035 | default: | |
1036 | break; | |
1037 | } | |
1038 | } | |
1039 | } else if (!(sym->flags & SYMBOL_DEF_AUTO)) | |
1040 | /* There is neither an old nor a new value. */ | |
1041 | continue; | |
1042 | /* else | |
1043 | * There is an old value, but no new value ('no' (unset) | |
1044 | * isn't saved in auto.conf, so the old value is always | |
1045 | * different from 'no'). | |
1046 | */ | |
1047 | ||
1508fec8 MY |
1048 | res = conf_touch_dep(sym->name); |
1049 | if (res) | |
1050 | return res; | |
2e3646e5 | 1051 | } |
2e3646e5 | 1052 | |
1508fec8 | 1053 | return 0; |
2e3646e5 RZ |
1054 | } |
1055 | ||
00c864f8 | 1056 | int conf_write_autoconf(int overwrite) |
c955ccaf RZ |
1057 | { |
1058 | struct symbol *sym; | |
12122f62 | 1059 | const char *name; |
00c864f8 | 1060 | const char *autoconf_name = conf_get_autoconfig_name(); |
8b41fc44 | 1061 | FILE *out, *out_h; |
49192f26 | 1062 | int i; |
c955ccaf | 1063 | |
00c864f8 MY |
1064 | if (!overwrite && is_present(autoconf_name)) |
1065 | return 0; | |
1066 | ||
a2ff4040 | 1067 | conf_write_dep("include/config/auto.conf.cmd"); |
c955ccaf | 1068 | |
0849d212 | 1069 | if (conf_touch_deps()) |
2e3646e5 RZ |
1070 | return 1; |
1071 | ||
c955ccaf RZ |
1072 | out = fopen(".tmpconfig", "w"); |
1073 | if (!out) | |
1074 | return 1; | |
1075 | ||
1076 | out_h = fopen(".tmpconfig.h", "w"); | |
1077 | if (!out_h) { | |
1078 | fclose(out); | |
1079 | return 1; | |
1080 | } | |
1081 | ||
e54e692b | 1082 | conf_write_heading(out, &kconfig_printer_cb, NULL); |
e54e692b | 1083 | conf_write_heading(out_h, &header_printer_cb, NULL); |
c955ccaf | 1084 | |
c955ccaf RZ |
1085 | for_all_symbols(i, sym) { |
1086 | sym_calc_value(sym); | |
a9596135 | 1087 | if (!(sym->flags & SYMBOL_WRITE) || !sym->name) |
c955ccaf | 1088 | continue; |
49192f26 | 1089 | |
8b41fc44 | 1090 | /* write symbols to auto.conf and autoconf.h */ |
e54e692b | 1091 | conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1); |
e54e692b | 1092 | conf_write_symbol(out_h, sym, &header_printer_cb, NULL); |
c955ccaf RZ |
1093 | } |
1094 | fclose(out); | |
1095 | fclose(out_h); | |
1096 | ||
1097 | name = getenv("KCONFIG_AUTOHEADER"); | |
1098 | if (!name) | |
264a2683 | 1099 | name = "include/generated/autoconf.h"; |
79123b13 MY |
1100 | if (make_parent_dir(name)) |
1101 | return 1; | |
c955ccaf RZ |
1102 | if (rename(".tmpconfig.h", name)) |
1103 | return 1; | |
79123b13 | 1104 | |
00c864f8 | 1105 | if (make_parent_dir(autoconf_name)) |
79123b13 | 1106 | return 1; |
c955ccaf RZ |
1107 | /* |
1108 | * This must be the last step, kbuild has a dependency on auto.conf | |
1109 | * and this marks the successful completion of the previous steps. | |
1110 | */ | |
00c864f8 | 1111 | if (rename(".tmpconfig", autoconf_name)) |
c955ccaf RZ |
1112 | return 1; |
1113 | ||
1114 | return 0; | |
1115 | } | |
b3214293 | 1116 | |
5ee54659 | 1117 | static bool conf_changed; |
3b354c55 | 1118 | static void (*conf_changed_callback)(void); |
bfc10001 | 1119 | |
5ee54659 | 1120 | void conf_set_changed(bool val) |
bfc10001 | 1121 | { |
5ee54659 | 1122 | if (conf_changed_callback && conf_changed != val) |
3b354c55 | 1123 | conf_changed_callback(); |
bfc10001 | 1124 | |
5ee54659 | 1125 | conf_changed = val; |
bfc10001 KW |
1126 | } |
1127 | ||
b3214293 KW |
1128 | bool conf_get_changed(void) |
1129 | { | |
5ee54659 | 1130 | return conf_changed; |
b3214293 | 1131 | } |
3b354c55 KW |
1132 | |
1133 | void conf_set_changed_callback(void (*fn)(void)) | |
1134 | { | |
1135 | conf_changed_callback = fn; | |
1136 | } | |
dc7862e5 | 1137 | |
fbe98bb9 | 1138 | void set_all_choice_values(struct symbol *csym) |
dc7862e5 | 1139 | { |
dc7862e5 | 1140 | struct property *prop; |
a64b44ea | 1141 | struct symbol *sym; |
dc7862e5 | 1142 | struct expr *e; |
a64b44ea SR |
1143 | |
1144 | prop = sym_get_choice_prop(csym); | |
1145 | ||
1146 | /* | |
1147 | * Set all non-assinged choice values to no | |
1148 | */ | |
1149 | expr_list_for_each_sym(prop->expr, e, sym) { | |
1150 | if (!sym_has_value(sym)) | |
1151 | sym->def[S_DEF_USER].tri = no; | |
1152 | } | |
1153 | csym->flags |= SYMBOL_DEF_USER; | |
1154 | /* clear VALID to get value calculated */ | |
fbe98bb9 | 1155 | csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES); |
a64b44ea | 1156 | } |