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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; | |
133 | const char *s; | |
134 | char *d, c; | |
135 | ||
136 | /* check overflow: prefix + name + ".h" + '\0' must fit in buffer. */ | |
137 | if (depfile_prefix_len + strlen(name) + 3 > sizeof(depfile_path)) | |
138 | return -1; | |
139 | ||
140 | d = depfile_path + depfile_prefix_len; | |
141 | s = name; | |
142 | ||
143 | while ((c = *s++)) | |
144 | *d++ = (c == '_') ? '/' : tolower(c); | |
145 | strcpy(d, ".h"); | |
146 | ||
147 | /* Assume directory path already exists. */ | |
148 | fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); | |
149 | if (fd == -1) { | |
150 | if (errno != ENOENT) | |
151 | return -1; | |
152 | ||
153 | ret = make_parent_dir(depfile_path); | |
154 | if (ret) | |
155 | return ret; | |
156 | ||
157 | /* Try it again. */ | |
158 | fd = open(depfile_path, O_WRONLY | O_CREAT | O_TRUNC, 0644); | |
159 | if (fd == -1) | |
160 | return -1; | |
161 | } | |
162 | close(fd); | |
163 | ||
164 | return 0; | |
165 | } | |
166 | ||
ad8d40cd MM |
167 | struct conf_printer { |
168 | void (*print_symbol)(FILE *, struct symbol *, const char *, void *); | |
169 | void (*print_comment)(FILE *, const char *, void *); | |
170 | }; | |
171 | ||
c1a0f5e3 RZ |
172 | static void conf_warning(const char *fmt, ...) |
173 | __attribute__ ((format (printf, 1, 2))); | |
174 | ||
42368c37 MM |
175 | static void conf_message(const char *fmt, ...) |
176 | __attribute__ ((format (printf, 1, 2))); | |
177 | ||
c1a0f5e3 | 178 | static const char *conf_filename; |
84dd95d4 | 179 | static int conf_lineno, conf_warnings; |
c1a0f5e3 | 180 | |
c1a0f5e3 RZ |
181 | static void conf_warning(const char *fmt, ...) |
182 | { | |
183 | va_list ap; | |
184 | va_start(ap, fmt); | |
185 | fprintf(stderr, "%s:%d:warning: ", conf_filename, conf_lineno); | |
186 | vfprintf(stderr, fmt, ap); | |
187 | fprintf(stderr, "\n"); | |
188 | va_end(ap); | |
189 | conf_warnings++; | |
190 | } | |
191 | ||
5accd7f3 | 192 | static void conf_default_message_callback(const char *s) |
42368c37 MM |
193 | { |
194 | printf("#\n# "); | |
5accd7f3 | 195 | printf("%s", s); |
42368c37 MM |
196 | printf("\n#\n"); |
197 | } | |
198 | ||
5accd7f3 | 199 | static void (*conf_message_callback)(const char *s) = |
42368c37 | 200 | conf_default_message_callback; |
5accd7f3 | 201 | void conf_set_message_callback(void (*fn)(const char *s)) |
42368c37 MM |
202 | { |
203 | conf_message_callback = fn; | |
204 | } | |
205 | ||
206 | static void conf_message(const char *fmt, ...) | |
207 | { | |
208 | va_list ap; | |
5accd7f3 MY |
209 | char buf[4096]; |
210 | ||
211 | if (!conf_message_callback) | |
212 | return; | |
42368c37 MM |
213 | |
214 | va_start(ap, fmt); | |
5accd7f3 MY |
215 | |
216 | vsnprintf(buf, sizeof(buf), fmt, ap); | |
217 | conf_message_callback(buf); | |
b6a2ab2c | 218 | va_end(ap); |
42368c37 MM |
219 | } |
220 | ||
14cdd3c4 RZ |
221 | const char *conf_get_configname(void) |
222 | { | |
223 | char *name = getenv("KCONFIG_CONFIG"); | |
224 | ||
225 | return name ? name : ".config"; | |
226 | } | |
227 | ||
9b9f5948 | 228 | static const char *conf_get_autoconfig_name(void) |
12122f62 MH |
229 | { |
230 | char *name = getenv("KCONFIG_AUTOCONFIG"); | |
231 | ||
232 | return name ? name : "include/config/auto.conf"; | |
233 | } | |
234 | ||
9c900a9c SR |
235 | static int conf_set_sym_val(struct symbol *sym, int def, int def_flags, char *p) |
236 | { | |
237 | char *p2; | |
238 | ||
239 | switch (sym->type) { | |
240 | case S_TRISTATE: | |
241 | if (p[0] == 'm') { | |
242 | sym->def[def].tri = mod; | |
243 | sym->flags |= def_flags; | |
244 | break; | |
245 | } | |
d8fc3200 | 246 | /* fall through */ |
9c900a9c SR |
247 | case S_BOOLEAN: |
248 | if (p[0] == 'y') { | |
249 | sym->def[def].tri = yes; | |
250 | sym->flags |= def_flags; | |
251 | break; | |
252 | } | |
253 | if (p[0] == 'n') { | |
254 | sym->def[def].tri = no; | |
255 | sym->flags |= def_flags; | |
256 | break; | |
257 | } | |
04b19b77 YM |
258 | if (def != S_DEF_AUTO) |
259 | conf_warning("symbol value '%s' invalid for %s", | |
260 | p, sym->name); | |
75f1468b | 261 | return 1; |
9c900a9c SR |
262 | case S_STRING: |
263 | if (*p++ != '"') | |
264 | break; | |
265 | for (p2 = p; (p2 = strpbrk(p2, "\"\\")); p2++) { | |
266 | if (*p2 == '"') { | |
267 | *p2 = 0; | |
268 | break; | |
269 | } | |
270 | memmove(p2, p2 + 1, strlen(p2)); | |
271 | } | |
272 | if (!p2) { | |
04b19b77 YM |
273 | if (def != S_DEF_AUTO) |
274 | conf_warning("invalid string found"); | |
9c900a9c SR |
275 | return 1; |
276 | } | |
d8fc3200 | 277 | /* fall through */ |
9c900a9c SR |
278 | case S_INT: |
279 | case S_HEX: | |
9c900a9c | 280 | if (sym_string_valid(sym, p)) { |
cd81fc82 | 281 | sym->def[def].val = xstrdup(p); |
9c900a9c SR |
282 | sym->flags |= def_flags; |
283 | } else { | |
04b19b77 YM |
284 | if (def != S_DEF_AUTO) |
285 | conf_warning("symbol value '%s' invalid for %s", | |
286 | p, sym->name); | |
9c900a9c SR |
287 | return 1; |
288 | } | |
289 | break; | |
290 | default: | |
291 | ; | |
292 | } | |
293 | return 0; | |
294 | } | |
295 | ||
1a7a8c6f CS |
296 | #define LINE_GROWTH 16 |
297 | static int add_byte(int c, char **lineptr, size_t slen, size_t *n) | |
298 | { | |
299 | char *nline; | |
300 | size_t new_size = slen + 1; | |
301 | if (new_size > *n) { | |
302 | new_size += LINE_GROWTH - 1; | |
303 | new_size *= 2; | |
d717f24d | 304 | nline = xrealloc(*lineptr, new_size); |
1a7a8c6f CS |
305 | if (!nline) |
306 | return -1; | |
307 | ||
308 | *lineptr = nline; | |
309 | *n = new_size; | |
310 | } | |
311 | ||
312 | (*lineptr)[slen] = c; | |
313 | ||
314 | return 0; | |
315 | } | |
316 | ||
317 | static ssize_t compat_getline(char **lineptr, size_t *n, FILE *stream) | |
318 | { | |
319 | char *line = *lineptr; | |
320 | size_t slen = 0; | |
321 | ||
322 | for (;;) { | |
323 | int c = getc(stream); | |
324 | ||
325 | switch (c) { | |
326 | case '\n': | |
327 | if (add_byte(c, &line, slen, n) < 0) | |
328 | goto e_out; | |
329 | slen++; | |
330 | /* fall through */ | |
331 | case EOF: | |
332 | if (add_byte('\0', &line, slen, n) < 0) | |
333 | goto e_out; | |
334 | *lineptr = line; | |
335 | if (slen == 0) | |
336 | return -1; | |
337 | return slen; | |
338 | default: | |
339 | if (add_byte(c, &line, slen, n) < 0) | |
340 | goto e_out; | |
341 | slen++; | |
342 | } | |
343 | } | |
344 | ||
345 | e_out: | |
346 | line[slen-1] = '\0'; | |
347 | *lineptr = line; | |
348 | return -1; | |
349 | } | |
350 | ||
669bfad9 | 351 | int conf_read_simple(const char *name, int def) |
1da177e4 LT |
352 | { |
353 | FILE *in = NULL; | |
1a7a8c6f CS |
354 | char *line = NULL; |
355 | size_t line_asize = 0; | |
1da177e4 | 356 | char *p, *p2; |
1da177e4 | 357 | struct symbol *sym; |
669bfad9 | 358 | int i, def_flags; |
1da177e4 LT |
359 | |
360 | if (name) { | |
361 | in = zconf_fopen(name); | |
362 | } else { | |
b75b0a81 | 363 | char *env; |
face4374 | 364 | |
14cdd3c4 | 365 | name = conf_get_configname(); |
ddc97cac RZ |
366 | in = zconf_fopen(name); |
367 | if (in) | |
368 | goto load; | |
bfc10001 | 369 | sym_add_change_count(1); |
b75b0a81 MY |
370 | |
371 | env = getenv("KCONFIG_DEFCONFIG_LIST"); | |
372 | if (!env) | |
face4374 RZ |
373 | return 1; |
374 | ||
b75b0a81 MY |
375 | while (1) { |
376 | bool is_last; | |
377 | ||
378 | while (isspace(*env)) | |
379 | env++; | |
380 | ||
381 | if (!*env) | |
382 | break; | |
383 | ||
384 | p = env; | |
385 | while (*p && !isspace(*p)) | |
386 | p++; | |
387 | ||
388 | is_last = (*p == '\0'); | |
389 | ||
390 | *p = '\0'; | |
391 | ||
392 | in = zconf_fopen(env); | |
1da177e4 | 393 | if (in) { |
694c49a7 | 394 | conf_message("using defaults found in %s", |
b75b0a81 | 395 | env); |
ddc97cac | 396 | goto load; |
1da177e4 | 397 | } |
b75b0a81 MY |
398 | |
399 | if (is_last) | |
400 | break; | |
401 | ||
402 | env = p + 1; | |
1da177e4 LT |
403 | } |
404 | } | |
1da177e4 LT |
405 | if (!in) |
406 | return 1; | |
407 | ||
ddc97cac | 408 | load: |
c1a0f5e3 RZ |
409 | conf_filename = name; |
410 | conf_lineno = 0; | |
411 | conf_warnings = 0; | |
c1a0f5e3 | 412 | |
669bfad9 | 413 | def_flags = SYMBOL_DEF << def; |
1da177e4 | 414 | for_all_symbols(i, sym) { |
669bfad9 RZ |
415 | sym->flags |= SYMBOL_CHANGED; |
416 | sym->flags &= ~(def_flags|SYMBOL_VALID); | |
490f1617 YM |
417 | if (sym_is_choice(sym)) |
418 | sym->flags |= def_flags; | |
1da177e4 LT |
419 | switch (sym->type) { |
420 | case S_INT: | |
421 | case S_HEX: | |
422 | case S_STRING: | |
669bfad9 RZ |
423 | if (sym->def[def].val) |
424 | free(sym->def[def].val); | |
d8fc3200 | 425 | /* fall through */ |
1da177e4 | 426 | default: |
669bfad9 RZ |
427 | sym->def[def].val = NULL; |
428 | sym->def[def].tri = no; | |
1da177e4 LT |
429 | } |
430 | } | |
431 | ||
1a7a8c6f | 432 | while (compat_getline(&line, &line_asize, in) != -1) { |
c1a0f5e3 | 433 | conf_lineno++; |
1da177e4 | 434 | sym = NULL; |
8baefd30 | 435 | if (line[0] == '#') { |
ffb5957b | 436 | if (memcmp(line + 2, CONFIG_, strlen(CONFIG_))) |
1da177e4 | 437 | continue; |
ffb5957b | 438 | p = strchr(line + 2 + strlen(CONFIG_), ' '); |
1da177e4 LT |
439 | if (!p) |
440 | continue; | |
441 | *p++ = 0; | |
442 | if (strncmp(p, "is not set", 10)) | |
443 | continue; | |
669bfad9 | 444 | if (def == S_DEF_USER) { |
ffb5957b | 445 | sym = sym_find(line + 2 + strlen(CONFIG_)); |
661b0680 | 446 | if (!sym) { |
447 | sym_add_change_count(1); | |
75889e9b | 448 | continue; |
661b0680 | 449 | } |
669bfad9 | 450 | } else { |
ffb5957b | 451 | sym = sym_lookup(line + 2 + strlen(CONFIG_), 0); |
669bfad9 RZ |
452 | if (sym->type == S_UNKNOWN) |
453 | sym->type = S_BOOLEAN; | |
454 | } | |
455 | if (sym->flags & def_flags) { | |
d84876f9 | 456 | conf_warning("override: reassigning to symbol %s", sym->name); |
1da177e4 LT |
457 | } |
458 | switch (sym->type) { | |
459 | case S_BOOLEAN: | |
460 | case S_TRISTATE: | |
669bfad9 RZ |
461 | sym->def[def].tri = no; |
462 | sym->flags |= def_flags; | |
1da177e4 LT |
463 | break; |
464 | default: | |
465 | ; | |
466 | } | |
ffb5957b AL |
467 | } else if (memcmp(line, CONFIG_, strlen(CONFIG_)) == 0) { |
468 | p = strchr(line + strlen(CONFIG_), '='); | |
1da177e4 LT |
469 | if (!p) |
470 | continue; | |
471 | *p++ = 0; | |
472 | p2 = strchr(p, '\n'); | |
d3660a8c MW |
473 | if (p2) { |
474 | *p2-- = 0; | |
475 | if (*p2 == '\r') | |
476 | *p2 = 0; | |
477 | } | |
2aabbed6 MY |
478 | |
479 | sym = sym_find(line + strlen(CONFIG_)); | |
480 | if (!sym) { | |
481 | if (def == S_DEF_AUTO) | |
482 | /* | |
483 | * Reading from include/config/auto.conf | |
484 | * If CONFIG_FOO previously existed in | |
485 | * auto.conf but it is missing now, | |
486 | * include/config/foo.h must be touched. | |
487 | */ | |
488 | conf_touch_dep(line + strlen(CONFIG_)); | |
489 | else | |
661b0680 | 490 | sym_add_change_count(1); |
2aabbed6 | 491 | continue; |
669bfad9 | 492 | } |
2aabbed6 | 493 | |
669bfad9 | 494 | if (sym->flags & def_flags) { |
d84876f9 | 495 | conf_warning("override: reassigning to symbol %s", sym->name); |
1da177e4 | 496 | } |
9c900a9c SR |
497 | if (conf_set_sym_val(sym, def, def_flags, p)) |
498 | continue; | |
8baefd30 AL |
499 | } else { |
500 | if (line[0] != '\r' && line[0] != '\n') | |
a4663911 PB |
501 | conf_warning("unexpected data: %.*s", |
502 | (int)strcspn(line, "\r\n"), line); | |
503 | ||
1da177e4 LT |
504 | continue; |
505 | } | |
75889e9b | 506 | |
1da177e4 LT |
507 | if (sym && sym_is_choice_value(sym)) { |
508 | struct symbol *cs = prop_get_symbol(sym_get_choice_prop(sym)); | |
669bfad9 | 509 | switch (sym->def[def].tri) { |
1da177e4 LT |
510 | case no: |
511 | break; | |
512 | case mod: | |
669bfad9 | 513 | if (cs->def[def].tri == yes) { |
c1a0f5e3 | 514 | conf_warning("%s creates inconsistent choice state", sym->name); |
490f1617 | 515 | cs->flags &= ~def_flags; |
c1a0f5e3 | 516 | } |
1da177e4 LT |
517 | break; |
518 | case yes: | |
d84876f9 JE |
519 | if (cs->def[def].tri != no) |
520 | conf_warning("override: %s changes choice state", sym->name); | |
521 | cs->def[def].val = sym; | |
1da177e4 LT |
522 | break; |
523 | } | |
d6ee3576 | 524 | cs->def[def].tri = EXPR_OR(cs->def[def].tri, sym->def[def].tri); |
1da177e4 LT |
525 | } |
526 | } | |
1a7a8c6f | 527 | free(line); |
1da177e4 | 528 | fclose(in); |
90389160 RZ |
529 | return 0; |
530 | } | |
531 | ||
532 | int conf_read(const char *name) | |
533 | { | |
5d09598d | 534 | struct symbol *sym; |
84dd95d4 | 535 | int conf_unsaved = 0; |
5d09598d | 536 | int i; |
90389160 | 537 | |
bfc10001 | 538 | sym_set_change_count(0); |
ddc97cac | 539 | |
6b87b70c AV |
540 | if (conf_read_simple(name, S_DEF_USER)) { |
541 | sym_calc_value(modules_sym); | |
90389160 | 542 | return 1; |
6b87b70c AV |
543 | } |
544 | ||
545 | sym_calc_value(modules_sym); | |
90389160 | 546 | |
1da177e4 LT |
547 | for_all_symbols(i, sym) { |
548 | sym_calc_value(sym); | |
693359f7 | 549 | if (sym_is_choice(sym) || (sym->flags & SYMBOL_NO_WRITE)) |
5d09598d | 550 | continue; |
c1a0f5e3 RZ |
551 | if (sym_has_value(sym) && (sym->flags & SYMBOL_WRITE)) { |
552 | /* check that calculated value agrees with saved value */ | |
553 | switch (sym->type) { | |
554 | case S_BOOLEAN: | |
555 | case S_TRISTATE: | |
e3cd5136 | 556 | if (sym->def[S_DEF_USER].tri == sym_get_tristate_value(sym)) |
5d09598d | 557 | continue; |
e3cd5136 | 558 | break; |
c1a0f5e3 | 559 | default: |
0c1822e6 | 560 | if (!strcmp(sym->curr.val, sym->def[S_DEF_USER].val)) |
5d09598d | 561 | continue; |
c1a0f5e3 RZ |
562 | break; |
563 | } | |
564 | } else if (!sym_has_value(sym) && !(sym->flags & SYMBOL_WRITE)) | |
565 | /* no previous value and not saved */ | |
5d09598d | 566 | continue; |
c1a0f5e3 RZ |
567 | conf_unsaved++; |
568 | /* maybe print value in verbose mode... */ | |
d8982ba1 RZ |
569 | } |
570 | ||
571 | for_all_symbols(i, sym) { | |
1da177e4 | 572 | if (sym_has_value(sym) && !sym_is_choice_value(sym)) { |
d8982ba1 RZ |
573 | /* Reset values of generates values, so they'll appear |
574 | * as new, if they should become visible, but that | |
575 | * doesn't quite work if the Kconfig and the saved | |
576 | * configuration disagree. | |
577 | */ | |
578 | if (sym->visible == no && !conf_unsaved) | |
669bfad9 | 579 | sym->flags &= ~SYMBOL_DEF_USER; |
1da177e4 LT |
580 | switch (sym->type) { |
581 | case S_STRING: | |
582 | case S_INT: | |
583 | case S_HEX: | |
d8982ba1 RZ |
584 | /* Reset a string value if it's out of range */ |
585 | if (sym_string_within_range(sym, sym->def[S_DEF_USER].val)) | |
586 | break; | |
587 | sym->flags &= ~(SYMBOL_VALID|SYMBOL_DEF_USER); | |
588 | conf_unsaved++; | |
589 | break; | |
1da177e4 LT |
590 | default: |
591 | break; | |
592 | } | |
593 | } | |
1da177e4 LT |
594 | } |
595 | ||
bfc10001 | 596 | sym_add_change_count(conf_warnings || conf_unsaved); |
1da177e4 LT |
597 | |
598 | return 0; | |
599 | } | |
600 | ||
e54e692b AL |
601 | /* |
602 | * Kconfig configuration printer | |
603 | * | |
604 | * This printer is used when generating the resulting configuration after | |
605 | * kconfig invocation and `defconfig' files. Unset symbol might be omitted by | |
606 | * passing a non-NULL argument to the printer. | |
607 | * | |
608 | */ | |
609 | static void | |
610 | kconfig_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) | |
611 | { | |
612 | ||
613 | switch (sym->type) { | |
614 | case S_BOOLEAN: | |
615 | case S_TRISTATE: | |
616 | if (*value == 'n') { | |
617 | bool skip_unset = (arg != NULL); | |
618 | ||
619 | if (!skip_unset) | |
620 | fprintf(fp, "# %s%s is not set\n", | |
621 | CONFIG_, sym->name); | |
622 | return; | |
623 | } | |
624 | break; | |
625 | default: | |
626 | break; | |
627 | } | |
628 | ||
629 | fprintf(fp, "%s%s=%s\n", CONFIG_, sym->name, value); | |
630 | } | |
631 | ||
632 | static void | |
633 | kconfig_print_comment(FILE *fp, const char *value, void *arg) | |
49192f26 | 634 | { |
e54e692b AL |
635 | const char *p = value; |
636 | size_t l; | |
637 | ||
638 | for (;;) { | |
639 | l = strcspn(p, "\n"); | |
640 | fprintf(fp, "#"); | |
49192f26 | 641 | if (l) { |
e54e692b | 642 | fprintf(fp, " "); |
70cc01e7 | 643 | xfwrite(p, l, 1, fp); |
e54e692b | 644 | p += l; |
49192f26 | 645 | } |
e54e692b AL |
646 | fprintf(fp, "\n"); |
647 | if (*p++ == '\0') | |
49192f26 | 648 | break; |
49192f26 | 649 | } |
49192f26 SR |
650 | } |
651 | ||
e54e692b | 652 | static struct conf_printer kconfig_printer_cb = |
49192f26 | 653 | { |
e54e692b AL |
654 | .print_symbol = kconfig_print_symbol, |
655 | .print_comment = kconfig_print_comment, | |
656 | }; | |
657 | ||
658 | /* | |
659 | * Header printer | |
660 | * | |
661 | * This printer is used when generating the `include/generated/autoconf.h' file. | |
662 | */ | |
663 | static void | |
664 | header_print_symbol(FILE *fp, struct symbol *sym, const char *value, void *arg) | |
665 | { | |
49192f26 | 666 | |
0dce6310 | 667 | switch (sym->type) { |
49192f26 | 668 | case S_BOOLEAN: |
eb4cf5a6 AL |
669 | case S_TRISTATE: { |
670 | const char *suffix = ""; | |
671 | ||
e54e692b AL |
672 | switch (*value) { |
673 | case 'n': | |
2a11c8ea | 674 | break; |
e54e692b AL |
675 | case 'm': |
676 | suffix = "_MODULE"; | |
eb4cf5a6 | 677 | /* fall through */ |
e54e692b | 678 | default: |
2a11c8ea MM |
679 | fprintf(fp, "#define %s%s%s 1\n", |
680 | CONFIG_, sym->name, suffix); | |
49192f26 | 681 | } |
eb4cf5a6 AL |
682 | break; |
683 | } | |
684 | case S_HEX: { | |
685 | const char *prefix = ""; | |
686 | ||
687 | if (value[0] != '0' || (value[1] != 'x' && value[1] != 'X')) | |
688 | prefix = "0x"; | |
689 | fprintf(fp, "#define %s%s %s%s\n", | |
690 | CONFIG_, sym->name, prefix, value); | |
691 | break; | |
692 | } | |
693 | case S_STRING: | |
694 | case S_INT: | |
695 | fprintf(fp, "#define %s%s %s\n", | |
696 | CONFIG_, sym->name, value); | |
49192f26 | 697 | break; |
e54e692b | 698 | default: |
49192f26 | 699 | break; |
e54e692b AL |
700 | } |
701 | ||
e54e692b AL |
702 | } |
703 | ||
704 | static void | |
705 | header_print_comment(FILE *fp, const char *value, void *arg) | |
706 | { | |
707 | const char *p = value; | |
708 | size_t l; | |
709 | ||
710 | fprintf(fp, "/*\n"); | |
711 | for (;;) { | |
712 | l = strcspn(p, "\n"); | |
713 | fprintf(fp, " *"); | |
714 | if (l) { | |
715 | fprintf(fp, " "); | |
70cc01e7 | 716 | xfwrite(p, l, 1, fp); |
e54e692b AL |
717 | p += l; |
718 | } | |
719 | fprintf(fp, "\n"); | |
720 | if (*p++ == '\0') | |
721 | break; | |
722 | } | |
723 | fprintf(fp, " */\n"); | |
724 | } | |
725 | ||
726 | static struct conf_printer header_printer_cb = | |
727 | { | |
728 | .print_symbol = header_print_symbol, | |
729 | .print_comment = header_print_comment, | |
730 | }; | |
731 | ||
e54e692b AL |
732 | static void conf_write_symbol(FILE *fp, struct symbol *sym, |
733 | struct conf_printer *printer, void *printer_arg) | |
734 | { | |
735 | const char *str; | |
736 | ||
737 | switch (sym->type) { | |
49192f26 SR |
738 | case S_UNKNOWN: |
739 | break; | |
e54e692b AL |
740 | case S_STRING: |
741 | str = sym_get_string_value(sym); | |
742 | str = sym_escape_string_value(str); | |
743 | printer->print_symbol(fp, sym, str, printer_arg); | |
744 | free((void *)str); | |
745 | break; | |
746 | default: | |
747 | str = sym_get_string_value(sym); | |
748 | printer->print_symbol(fp, sym, str, printer_arg); | |
49192f26 SR |
749 | } |
750 | } | |
751 | ||
e54e692b AL |
752 | static void |
753 | conf_write_heading(FILE *fp, struct conf_printer *printer, void *printer_arg) | |
754 | { | |
755 | char buf[256]; | |
756 | ||
757 | snprintf(buf, sizeof(buf), | |
758 | "\n" | |
759 | "Automatically generated file; DO NOT EDIT.\n" | |
760 | "%s\n", | |
761 | rootmenu.prompt->text); | |
762 | ||
763 | printer->print_comment(fp, buf, printer_arg); | |
764 | } | |
765 | ||
7cf3d73b SR |
766 | /* |
767 | * Write out a minimal config. | |
768 | * All values that has default values are skipped as this is redundant. | |
769 | */ | |
770 | int conf_write_defconfig(const char *filename) | |
771 | { | |
772 | struct symbol *sym; | |
773 | struct menu *menu; | |
774 | FILE *out; | |
775 | ||
776 | out = fopen(filename, "w"); | |
777 | if (!out) | |
778 | return 1; | |
779 | ||
780 | sym_clear_all_valid(); | |
781 | ||
782 | /* Traverse all menus to find all relevant symbols */ | |
783 | menu = rootmenu.list; | |
784 | ||
785 | while (menu != NULL) | |
786 | { | |
787 | sym = menu->sym; | |
788 | if (sym == NULL) { | |
789 | if (!menu_is_visible(menu)) | |
790 | goto next_menu; | |
791 | } else if (!sym_is_choice(sym)) { | |
792 | sym_calc_value(sym); | |
793 | if (!(sym->flags & SYMBOL_WRITE)) | |
794 | goto next_menu; | |
795 | sym->flags &= ~SYMBOL_WRITE; | |
796 | /* If we cannot change the symbol - skip */ | |
baa23ec8 | 797 | if (!sym_is_changeable(sym)) |
7cf3d73b SR |
798 | goto next_menu; |
799 | /* If symbol equals to default value - skip */ | |
800 | if (strcmp(sym_get_string_value(sym), sym_get_string_default(sym)) == 0) | |
801 | goto next_menu; | |
802 | ||
803 | /* | |
804 | * If symbol is a choice value and equals to the | |
805 | * default for a choice - skip. | |
84062dd3 SR |
806 | * But only if value is bool and equal to "y" and |
807 | * choice is not "optional". | |
808 | * (If choice is "optional" then all values can be "n") | |
7cf3d73b SR |
809 | */ |
810 | if (sym_is_choice_value(sym)) { | |
811 | struct symbol *cs; | |
812 | struct symbol *ds; | |
813 | ||
814 | cs = prop_get_symbol(sym_get_choice_prop(sym)); | |
815 | ds = sym_choice_default(cs); | |
84062dd3 | 816 | if (!sym_is_optional(cs) && sym == ds) { |
801690ca SR |
817 | if ((sym->type == S_BOOLEAN) && |
818 | sym_get_tristate_value(sym) == yes) | |
7cf3d73b SR |
819 | goto next_menu; |
820 | } | |
821 | } | |
e54e692b | 822 | conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); |
7cf3d73b SR |
823 | } |
824 | next_menu: | |
825 | if (menu->list != NULL) { | |
826 | menu = menu->list; | |
827 | } | |
828 | else if (menu->next != NULL) { | |
829 | menu = menu->next; | |
830 | } else { | |
831 | while ((menu = menu->parent)) { | |
832 | if (menu->next != NULL) { | |
833 | menu = menu->next; | |
834 | break; | |
835 | } | |
836 | } | |
837 | } | |
838 | } | |
839 | fclose(out); | |
840 | return 0; | |
841 | } | |
842 | ||
1da177e4 LT |
843 | int conf_write(const char *name) |
844 | { | |
c955ccaf | 845 | FILE *out; |
1da177e4 LT |
846 | struct symbol *sym; |
847 | struct menu *menu; | |
1da177e4 | 848 | const char *str; |
ceb7f329 | 849 | char tmpname[PATH_MAX + 1], oldname[PATH_MAX + 1]; |
1da177e4 | 850 | char *env; |
0c5b6c28 | 851 | int i; |
aff11cd9 | 852 | bool need_newline = false; |
1da177e4 | 853 | |
ceb7f329 MY |
854 | if (!name) |
855 | name = conf_get_configname(); | |
856 | ||
857 | if (!*name) { | |
858 | fprintf(stderr, "config name is empty\n"); | |
859 | return -1; | |
860 | } | |
861 | ||
862 | if (is_dir(name)) { | |
863 | fprintf(stderr, "%s: Is a directory\n", name); | |
864 | return -1; | |
865 | } | |
866 | ||
580c5b3e MY |
867 | if (make_parent_dir(name)) |
868 | return -1; | |
869 | ||
14cdd3c4 | 870 | env = getenv("KCONFIG_OVERWRITECONFIG"); |
ceb7f329 | 871 | if (env && *env) { |
14cdd3c4 | 872 | *tmpname = 0; |
ceb7f329 MY |
873 | out = fopen(name, "w"); |
874 | } else { | |
875 | snprintf(tmpname, sizeof(tmpname), "%s.%d.tmp", | |
876 | name, (int)getpid()); | |
877 | out = fopen(tmpname, "w"); | |
14cdd3c4 | 878 | } |
1da177e4 LT |
879 | if (!out) |
880 | return 1; | |
14cdd3c4 | 881 | |
e54e692b | 882 | conf_write_heading(out, &kconfig_printer_cb, NULL); |
1da177e4 | 883 | |
b3214293 | 884 | if (!conf_get_changed()) |
1da177e4 LT |
885 | sym_clear_all_valid(); |
886 | ||
887 | menu = rootmenu.list; | |
888 | while (menu) { | |
889 | sym = menu->sym; | |
890 | if (!sym) { | |
891 | if (!menu_is_visible(menu)) | |
892 | goto next; | |
893 | str = menu_get_prompt(menu); | |
894 | fprintf(out, "\n" | |
895 | "#\n" | |
896 | "# %s\n" | |
897 | "#\n", str); | |
aff11cd9 | 898 | need_newline = false; |
8e2442a5 MY |
899 | } else if (!(sym->flags & SYMBOL_CHOICE) && |
900 | !(sym->flags & SYMBOL_WRITTEN)) { | |
1da177e4 LT |
901 | sym_calc_value(sym); |
902 | if (!(sym->flags & SYMBOL_WRITE)) | |
903 | goto next; | |
aff11cd9 AP |
904 | if (need_newline) { |
905 | fprintf(out, "\n"); | |
906 | need_newline = false; | |
907 | } | |
8e2442a5 | 908 | sym->flags |= SYMBOL_WRITTEN; |
e54e692b | 909 | conf_write_symbol(out, sym, &kconfig_printer_cb, NULL); |
1da177e4 LT |
910 | } |
911 | ||
49192f26 | 912 | next: |
1da177e4 LT |
913 | if (menu->list) { |
914 | menu = menu->list; | |
915 | continue; | |
916 | } | |
917 | if (menu->next) | |
918 | menu = menu->next; | |
919 | else while ((menu = menu->parent)) { | |
aff11cd9 AP |
920 | if (!menu->sym && menu_is_visible(menu) && |
921 | menu != &rootmenu) { | |
922 | str = menu_get_prompt(menu); | |
923 | fprintf(out, "# end of %s\n", str); | |
924 | need_newline = true; | |
925 | } | |
1da177e4 LT |
926 | if (menu->next) { |
927 | menu = menu->next; | |
928 | break; | |
929 | } | |
930 | } | |
931 | } | |
932 | fclose(out); | |
14cdd3c4 | 933 | |
0c5b6c28 VB |
934 | for_all_symbols(i, sym) |
935 | sym->flags &= ~SYMBOL_WRITTEN; | |
936 | ||
14cdd3c4 | 937 | if (*tmpname) { |
67424f61 MY |
938 | if (is_same(name, tmpname)) { |
939 | conf_message("No change to %s", name); | |
940 | unlink(tmpname); | |
941 | sym_set_change_count(0); | |
942 | return 0; | |
943 | } | |
944 | ||
ceb7f329 MY |
945 | snprintf(oldname, sizeof(oldname), "%s.old", name); |
946 | rename(name, oldname); | |
947 | if (rename(tmpname, name)) | |
14cdd3c4 | 948 | return 1; |
1da177e4 | 949 | } |
1da177e4 | 950 | |
ceb7f329 | 951 | conf_message("configuration written to %s", name); |
ddc97cac | 952 | |
bfc10001 | 953 | sym_set_change_count(0); |
1da177e4 LT |
954 | |
955 | return 0; | |
956 | } | |
c955ccaf | 957 | |
a2ff4040 MY |
958 | /* write a dependency file as used by kbuild to track dependencies */ |
959 | static int conf_write_dep(const char *name) | |
960 | { | |
961 | struct file *file; | |
962 | FILE *out; | |
963 | ||
a2ff4040 MY |
964 | out = fopen("..config.tmp", "w"); |
965 | if (!out) | |
966 | return 1; | |
967 | fprintf(out, "deps_config := \\\n"); | |
968 | for (file = file_list; file; file = file->next) { | |
969 | if (file->next) | |
970 | fprintf(out, "\t%s \\\n", file->name); | |
971 | else | |
972 | fprintf(out, "\t%s\n", file->name); | |
973 | } | |
974 | fprintf(out, "\n%s: \\\n" | |
975 | "\t$(deps_config)\n\n", conf_get_autoconfig_name()); | |
976 | ||
977 | env_write_dep(out, conf_get_autoconfig_name()); | |
978 | ||
979 | fprintf(out, "\n$(deps_config): ;\n"); | |
980 | fclose(out); | |
79123b13 MY |
981 | |
982 | if (make_parent_dir(name)) | |
983 | return 1; | |
a2ff4040 MY |
984 | rename("..config.tmp", name); |
985 | return 0; | |
986 | } | |
987 | ||
0849d212 | 988 | static int conf_touch_deps(void) |
2e3646e5 | 989 | { |
12122f62 | 990 | const char *name; |
2e3646e5 | 991 | struct symbol *sym; |
1508fec8 MY |
992 | int res, i; |
993 | ||
994 | strcpy(depfile_path, "include/config/"); | |
995 | depfile_prefix_len = strlen(depfile_path); | |
2e3646e5 | 996 | |
12122f62 | 997 | name = conf_get_autoconfig_name(); |
2e3646e5 | 998 | conf_read_simple(name, S_DEF_AUTO); |
6b87b70c | 999 | sym_calc_value(modules_sym); |
2e3646e5 | 1000 | |
2e3646e5 RZ |
1001 | for_all_symbols(i, sym) { |
1002 | sym_calc_value(sym); | |
693359f7 | 1003 | if ((sym->flags & SYMBOL_NO_WRITE) || !sym->name) |
2e3646e5 RZ |
1004 | continue; |
1005 | if (sym->flags & SYMBOL_WRITE) { | |
1006 | if (sym->flags & SYMBOL_DEF_AUTO) { | |
1007 | /* | |
1008 | * symbol has old and new value, | |
1009 | * so compare them... | |
1010 | */ | |
1011 | switch (sym->type) { | |
1012 | case S_BOOLEAN: | |
1013 | case S_TRISTATE: | |
1014 | if (sym_get_tristate_value(sym) == | |
1015 | sym->def[S_DEF_AUTO].tri) | |
1016 | continue; | |
1017 | break; | |
1018 | case S_STRING: | |
1019 | case S_HEX: | |
1020 | case S_INT: | |
1021 | if (!strcmp(sym_get_string_value(sym), | |
1022 | sym->def[S_DEF_AUTO].val)) | |
1023 | continue; | |
1024 | break; | |
1025 | default: | |
1026 | break; | |
1027 | } | |
1028 | } else { | |
1029 | /* | |
1030 | * If there is no old value, only 'no' (unset) | |
1031 | * is allowed as new value. | |
1032 | */ | |
1033 | switch (sym->type) { | |
1034 | case S_BOOLEAN: | |
1035 | case S_TRISTATE: | |
1036 | if (sym_get_tristate_value(sym) == no) | |
1037 | continue; | |
1038 | break; | |
1039 | default: | |
1040 | break; | |
1041 | } | |
1042 | } | |
1043 | } else if (!(sym->flags & SYMBOL_DEF_AUTO)) | |
1044 | /* There is neither an old nor a new value. */ | |
1045 | continue; | |
1046 | /* else | |
1047 | * There is an old value, but no new value ('no' (unset) | |
1048 | * isn't saved in auto.conf, so the old value is always | |
1049 | * different from 'no'). | |
1050 | */ | |
1051 | ||
1508fec8 MY |
1052 | res = conf_touch_dep(sym->name); |
1053 | if (res) | |
1054 | return res; | |
2e3646e5 | 1055 | } |
2e3646e5 | 1056 | |
1508fec8 | 1057 | return 0; |
2e3646e5 RZ |
1058 | } |
1059 | ||
00c864f8 | 1060 | int conf_write_autoconf(int overwrite) |
c955ccaf RZ |
1061 | { |
1062 | struct symbol *sym; | |
12122f62 | 1063 | const char *name; |
00c864f8 | 1064 | const char *autoconf_name = conf_get_autoconfig_name(); |
8b41fc44 | 1065 | FILE *out, *out_h; |
49192f26 | 1066 | int i; |
c955ccaf | 1067 | |
00c864f8 MY |
1068 | if (!overwrite && is_present(autoconf_name)) |
1069 | return 0; | |
1070 | ||
a2ff4040 | 1071 | conf_write_dep("include/config/auto.conf.cmd"); |
c955ccaf | 1072 | |
0849d212 | 1073 | if (conf_touch_deps()) |
2e3646e5 RZ |
1074 | return 1; |
1075 | ||
c955ccaf RZ |
1076 | out = fopen(".tmpconfig", "w"); |
1077 | if (!out) | |
1078 | return 1; | |
1079 | ||
1080 | out_h = fopen(".tmpconfig.h", "w"); | |
1081 | if (!out_h) { | |
1082 | fclose(out); | |
1083 | return 1; | |
1084 | } | |
1085 | ||
e54e692b | 1086 | conf_write_heading(out, &kconfig_printer_cb, NULL); |
e54e692b | 1087 | conf_write_heading(out_h, &header_printer_cb, NULL); |
c955ccaf | 1088 | |
c955ccaf RZ |
1089 | for_all_symbols(i, sym) { |
1090 | sym_calc_value(sym); | |
a9596135 | 1091 | if (!(sym->flags & SYMBOL_WRITE) || !sym->name) |
c955ccaf | 1092 | continue; |
49192f26 | 1093 | |
8b41fc44 | 1094 | /* write symbols to auto.conf and autoconf.h */ |
e54e692b | 1095 | conf_write_symbol(out, sym, &kconfig_printer_cb, (void *)1); |
e54e692b | 1096 | conf_write_symbol(out_h, sym, &header_printer_cb, NULL); |
c955ccaf RZ |
1097 | } |
1098 | fclose(out); | |
1099 | fclose(out_h); | |
1100 | ||
1101 | name = getenv("KCONFIG_AUTOHEADER"); | |
1102 | if (!name) | |
264a2683 | 1103 | name = "include/generated/autoconf.h"; |
79123b13 MY |
1104 | if (make_parent_dir(name)) |
1105 | return 1; | |
c955ccaf RZ |
1106 | if (rename(".tmpconfig.h", name)) |
1107 | return 1; | |
79123b13 | 1108 | |
00c864f8 | 1109 | if (make_parent_dir(autoconf_name)) |
79123b13 | 1110 | return 1; |
c955ccaf RZ |
1111 | /* |
1112 | * This must be the last step, kbuild has a dependency on auto.conf | |
1113 | * and this marks the successful completion of the previous steps. | |
1114 | */ | |
00c864f8 | 1115 | if (rename(".tmpconfig", autoconf_name)) |
c955ccaf RZ |
1116 | return 1; |
1117 | ||
1118 | return 0; | |
1119 | } | |
b3214293 | 1120 | |
bfc10001 | 1121 | static int sym_change_count; |
3b354c55 | 1122 | static void (*conf_changed_callback)(void); |
bfc10001 KW |
1123 | |
1124 | void sym_set_change_count(int count) | |
1125 | { | |
3b354c55 | 1126 | int _sym_change_count = sym_change_count; |
bfc10001 | 1127 | sym_change_count = count; |
3b354c55 KW |
1128 | if (conf_changed_callback && |
1129 | (bool)_sym_change_count != (bool)count) | |
1130 | conf_changed_callback(); | |
bfc10001 KW |
1131 | } |
1132 | ||
1133 | void sym_add_change_count(int count) | |
1134 | { | |
3b354c55 | 1135 | sym_set_change_count(count + sym_change_count); |
bfc10001 KW |
1136 | } |
1137 | ||
b3214293 KW |
1138 | bool conf_get_changed(void) |
1139 | { | |
1140 | return sym_change_count; | |
1141 | } | |
3b354c55 KW |
1142 | |
1143 | void conf_set_changed_callback(void (*fn)(void)) | |
1144 | { | |
1145 | conf_changed_callback = fn; | |
1146 | } | |
dc7862e5 | 1147 | |
fbe98bb9 | 1148 | void set_all_choice_values(struct symbol *csym) |
dc7862e5 | 1149 | { |
dc7862e5 | 1150 | struct property *prop; |
a64b44ea | 1151 | struct symbol *sym; |
dc7862e5 | 1152 | struct expr *e; |
a64b44ea SR |
1153 | |
1154 | prop = sym_get_choice_prop(csym); | |
1155 | ||
1156 | /* | |
1157 | * Set all non-assinged choice values to no | |
1158 | */ | |
1159 | expr_list_for_each_sym(prop->expr, e, sym) { | |
1160 | if (!sym_has_value(sym)) | |
1161 | sym->def[S_DEF_USER].tri = no; | |
1162 | } | |
1163 | csym->flags |= SYMBOL_DEF_USER; | |
1164 | /* clear VALID to get value calculated */ | |
fbe98bb9 | 1165 | csym->flags &= ~(SYMBOL_VALID | SYMBOL_NEED_SET_CHOICE_VALUES); |
a64b44ea | 1166 | } |