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Commit | Line | Data |
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1 | /* | |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | * Copyright (C) Johannes Schindelin, 2005 | |
6 | * | |
7 | */ | |
8 | #include "cache.h" | |
9 | ||
10 | #define MAXNAME (256) | |
11 | ||
12 | static FILE *config_file; | |
13 | static const char *config_file_name; | |
14 | static int config_linenr; | |
15 | static int get_next_char(void) | |
16 | { | |
17 | int c; | |
18 | FILE *f; | |
19 | ||
20 | c = '\n'; | |
21 | if ((f = config_file) != NULL) { | |
22 | c = fgetc(f); | |
23 | if (c == '\r') { | |
24 | /* DOS like systems */ | |
25 | c = fgetc(f); | |
26 | if (c != '\n') { | |
27 | ungetc(c, f); | |
28 | c = '\r'; | |
29 | } | |
30 | } | |
31 | if (c == '\n') | |
32 | config_linenr++; | |
33 | if (c == EOF) { | |
34 | config_file = NULL; | |
35 | c = '\n'; | |
36 | } | |
37 | } | |
38 | return c; | |
39 | } | |
40 | ||
41 | static char *parse_value(void) | |
42 | { | |
43 | static char value[1024]; | |
44 | int quote = 0, comment = 0, len = 0, space = 0; | |
45 | ||
46 | for (;;) { | |
47 | int c = get_next_char(); | |
48 | if (len >= sizeof(value)) | |
49 | return NULL; | |
50 | if (c == '\n') { | |
51 | if (quote) | |
52 | return NULL; | |
53 | value[len] = 0; | |
54 | return value; | |
55 | } | |
56 | if (comment) | |
57 | continue; | |
58 | if (isspace(c) && !quote) { | |
59 | space = 1; | |
60 | continue; | |
61 | } | |
62 | if (!quote) { | |
63 | if (c == ';' || c == '#') { | |
64 | comment = 1; | |
65 | continue; | |
66 | } | |
67 | } | |
68 | if (space) { | |
69 | if (len) | |
70 | value[len++] = ' '; | |
71 | space = 0; | |
72 | } | |
73 | if (c == '\\') { | |
74 | c = get_next_char(); | |
75 | switch (c) { | |
76 | case '\n': | |
77 | continue; | |
78 | case 't': | |
79 | c = '\t'; | |
80 | break; | |
81 | case 'b': | |
82 | c = '\b'; | |
83 | break; | |
84 | case 'n': | |
85 | c = '\n'; | |
86 | break; | |
87 | /* Some characters escape as themselves */ | |
88 | case '\\': case '"': | |
89 | break; | |
90 | /* Reject unknown escape sequences */ | |
91 | default: | |
92 | return NULL; | |
93 | } | |
94 | value[len++] = c; | |
95 | continue; | |
96 | } | |
97 | if (c == '"') { | |
98 | quote = 1-quote; | |
99 | continue; | |
100 | } | |
101 | value[len++] = c; | |
102 | } | |
103 | } | |
104 | ||
105 | static inline int iskeychar(int c) | |
106 | { | |
107 | return isalnum(c) || c == '-'; | |
108 | } | |
109 | ||
110 | static int get_value(config_fn_t fn, char *name, unsigned int len) | |
111 | { | |
112 | int c; | |
113 | char *value; | |
114 | ||
115 | /* Get the full name */ | |
116 | for (;;) { | |
117 | c = get_next_char(); | |
118 | if (c == EOF) | |
119 | break; | |
120 | if (!iskeychar(c)) | |
121 | break; | |
122 | name[len++] = tolower(c); | |
123 | if (len >= MAXNAME) | |
124 | return -1; | |
125 | } | |
126 | name[len] = 0; | |
127 | while (c == ' ' || c == '\t') | |
128 | c = get_next_char(); | |
129 | ||
130 | value = NULL; | |
131 | if (c != '\n') { | |
132 | if (c != '=') | |
133 | return -1; | |
134 | value = parse_value(); | |
135 | if (!value) | |
136 | return -1; | |
137 | } | |
138 | return fn(name, value); | |
139 | } | |
140 | ||
141 | static int get_extended_base_var(char *name, int baselen, int c) | |
142 | { | |
143 | do { | |
144 | if (c == '\n') | |
145 | return -1; | |
146 | c = get_next_char(); | |
147 | } while (isspace(c)); | |
148 | ||
149 | /* We require the format to be '[base "extension"]' */ | |
150 | if (c != '"') | |
151 | return -1; | |
152 | name[baselen++] = '.'; | |
153 | ||
154 | for (;;) { | |
155 | int c = get_next_char(); | |
156 | if (c == '\n') | |
157 | return -1; | |
158 | if (c == '"') | |
159 | break; | |
160 | if (c == '\\') { | |
161 | c = get_next_char(); | |
162 | if (c == '\n') | |
163 | return -1; | |
164 | } | |
165 | name[baselen++] = c; | |
166 | if (baselen > MAXNAME / 2) | |
167 | return -1; | |
168 | } | |
169 | ||
170 | /* Final ']' */ | |
171 | if (get_next_char() != ']') | |
172 | return -1; | |
173 | return baselen; | |
174 | } | |
175 | ||
176 | static int get_base_var(char *name) | |
177 | { | |
178 | int baselen = 0; | |
179 | ||
180 | for (;;) { | |
181 | int c = get_next_char(); | |
182 | if (c == EOF) | |
183 | return -1; | |
184 | if (c == ']') | |
185 | return baselen; | |
186 | if (isspace(c)) | |
187 | return get_extended_base_var(name, baselen, c); | |
188 | if (!iskeychar(c) && c != '.') | |
189 | return -1; | |
190 | if (baselen > MAXNAME / 2) | |
191 | return -1; | |
192 | name[baselen++] = tolower(c); | |
193 | } | |
194 | } | |
195 | ||
196 | static int git_parse_file(config_fn_t fn) | |
197 | { | |
198 | int comment = 0; | |
199 | int baselen = 0; | |
200 | static char var[MAXNAME]; | |
201 | ||
202 | for (;;) { | |
203 | int c = get_next_char(); | |
204 | if (c == '\n') { | |
205 | /* EOF? */ | |
206 | if (!config_file) | |
207 | return 0; | |
208 | comment = 0; | |
209 | continue; | |
210 | } | |
211 | if (comment || isspace(c)) | |
212 | continue; | |
213 | if (c == '#' || c == ';') { | |
214 | comment = 1; | |
215 | continue; | |
216 | } | |
217 | if (c == '[') { | |
218 | baselen = get_base_var(var); | |
219 | if (baselen <= 0) | |
220 | break; | |
221 | var[baselen++] = '.'; | |
222 | var[baselen] = 0; | |
223 | continue; | |
224 | } | |
225 | if (!isalpha(c)) | |
226 | break; | |
227 | var[baselen] = tolower(c); | |
228 | if (get_value(fn, var, baselen+1) < 0) | |
229 | break; | |
230 | } | |
231 | die("bad config file line %d in %s", config_linenr, config_file_name); | |
232 | } | |
233 | ||
234 | int git_config_int(const char *name, const char *value) | |
235 | { | |
236 | if (value && *value) { | |
237 | char *end; | |
238 | int val = strtol(value, &end, 0); | |
239 | if (!*end) | |
240 | return val; | |
241 | if (!strcasecmp(end, "k")) | |
242 | return val * 1024; | |
243 | if (!strcasecmp(end, "m")) | |
244 | return val * 1024 * 1024; | |
245 | if (!strcasecmp(end, "g")) | |
246 | return val * 1024 * 1024 * 1024; | |
247 | } | |
248 | die("bad config value for '%s' in %s", name, config_file_name); | |
249 | } | |
250 | ||
251 | int git_config_bool(const char *name, const char *value) | |
252 | { | |
253 | if (!value) | |
254 | return 1; | |
255 | if (!*value) | |
256 | return 0; | |
257 | if (!strcasecmp(value, "true") || !strcasecmp(value, "yes")) | |
258 | return 1; | |
259 | if (!strcasecmp(value, "false") || !strcasecmp(value, "no")) | |
260 | return 0; | |
261 | return git_config_int(name, value) != 0; | |
262 | } | |
263 | ||
264 | int git_default_config(const char *var, const char *value) | |
265 | { | |
266 | /* This needs a better name */ | |
267 | if (!strcmp(var, "core.filemode")) { | |
268 | trust_executable_bit = git_config_bool(var, value); | |
269 | return 0; | |
270 | } | |
271 | ||
272 | if (!strcmp(var, "core.symlinks")) { | |
273 | has_symlinks = git_config_bool(var, value); | |
274 | return 0; | |
275 | } | |
276 | ||
277 | if (!strcmp(var, "core.bare")) { | |
278 | is_bare_repository_cfg = git_config_bool(var, value); | |
279 | return 0; | |
280 | } | |
281 | ||
282 | if (!strcmp(var, "core.ignorestat")) { | |
283 | assume_unchanged = git_config_bool(var, value); | |
284 | return 0; | |
285 | } | |
286 | ||
287 | if (!strcmp(var, "core.prefersymlinkrefs")) { | |
288 | prefer_symlink_refs = git_config_bool(var, value); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | if (!strcmp(var, "core.logallrefupdates")) { | |
293 | log_all_ref_updates = git_config_bool(var, value); | |
294 | return 0; | |
295 | } | |
296 | ||
297 | if (!strcmp(var, "core.warnambiguousrefs")) { | |
298 | warn_ambiguous_refs = git_config_bool(var, value); | |
299 | return 0; | |
300 | } | |
301 | ||
302 | if (!strcmp(var, "core.legacyheaders")) { | |
303 | use_legacy_headers = git_config_bool(var, value); | |
304 | return 0; | |
305 | } | |
306 | ||
307 | if (!strcmp(var, "core.compression")) { | |
308 | int level = git_config_int(var, value); | |
309 | if (level == -1) | |
310 | level = Z_DEFAULT_COMPRESSION; | |
311 | else if (level < 0 || level > Z_BEST_COMPRESSION) | |
312 | die("bad zlib compression level %d", level); | |
313 | zlib_compression_level = level; | |
314 | return 0; | |
315 | } | |
316 | ||
317 | if (!strcmp(var, "core.packedgitwindowsize")) { | |
318 | int pgsz_x2 = getpagesize() * 2; | |
319 | packed_git_window_size = git_config_int(var, value); | |
320 | ||
321 | /* This value must be multiple of (pagesize * 2) */ | |
322 | packed_git_window_size /= pgsz_x2; | |
323 | if (packed_git_window_size < 1) | |
324 | packed_git_window_size = 1; | |
325 | packed_git_window_size *= pgsz_x2; | |
326 | return 0; | |
327 | } | |
328 | ||
329 | if (!strcmp(var, "core.packedgitlimit")) { | |
330 | packed_git_limit = git_config_int(var, value); | |
331 | return 0; | |
332 | } | |
333 | ||
334 | if (!strcmp(var, "core.deltabasecachelimit")) { | |
335 | delta_base_cache_limit = git_config_int(var, value); | |
336 | return 0; | |
337 | } | |
338 | ||
339 | if (!strcmp(var, "core.autocrlf")) { | |
340 | if (value && !strcasecmp(value, "input")) { | |
341 | auto_crlf = -1; | |
342 | return 0; | |
343 | } | |
344 | auto_crlf = git_config_bool(var, value); | |
345 | return 0; | |
346 | } | |
347 | ||
348 | if (!strcmp(var, "user.name")) { | |
349 | strlcpy(git_default_name, value, sizeof(git_default_name)); | |
350 | return 0; | |
351 | } | |
352 | ||
353 | if (!strcmp(var, "user.email")) { | |
354 | strlcpy(git_default_email, value, sizeof(git_default_email)); | |
355 | return 0; | |
356 | } | |
357 | ||
358 | if (!strcmp(var, "i18n.commitencoding")) { | |
359 | git_commit_encoding = xstrdup(value); | |
360 | return 0; | |
361 | } | |
362 | ||
363 | if (!strcmp(var, "i18n.logoutputencoding")) { | |
364 | git_log_output_encoding = xstrdup(value); | |
365 | return 0; | |
366 | } | |
367 | ||
368 | ||
369 | if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) { | |
370 | pager_use_color = git_config_bool(var,value); | |
371 | return 0; | |
372 | } | |
373 | ||
374 | /* Add other config variables here and to Documentation/config.txt. */ | |
375 | return 0; | |
376 | } | |
377 | ||
378 | int git_config_from_file(config_fn_t fn, const char *filename) | |
379 | { | |
380 | int ret; | |
381 | FILE *f = fopen(filename, "r"); | |
382 | ||
383 | ret = -1; | |
384 | if (f) { | |
385 | config_file = f; | |
386 | config_file_name = filename; | |
387 | config_linenr = 1; | |
388 | ret = git_parse_file(fn); | |
389 | fclose(f); | |
390 | config_file_name = NULL; | |
391 | } | |
392 | return ret; | |
393 | } | |
394 | ||
395 | int git_config(config_fn_t fn) | |
396 | { | |
397 | int ret = 0; | |
398 | char *repo_config = NULL; | |
399 | const char *home = NULL, *filename; | |
400 | ||
401 | /* $GIT_CONFIG makes git read _only_ the given config file, | |
402 | * $GIT_CONFIG_LOCAL will make it process it in addition to the | |
403 | * global config file, the same way it would the per-repository | |
404 | * config file otherwise. */ | |
405 | filename = getenv(CONFIG_ENVIRONMENT); | |
406 | if (!filename) { | |
407 | if (!access(ETC_GITCONFIG, R_OK)) | |
408 | ret += git_config_from_file(fn, ETC_GITCONFIG); | |
409 | home = getenv("HOME"); | |
410 | filename = getenv(CONFIG_LOCAL_ENVIRONMENT); | |
411 | if (!filename) | |
412 | filename = repo_config = xstrdup(git_path("config")); | |
413 | } | |
414 | ||
415 | if (home) { | |
416 | char *user_config = xstrdup(mkpath("%s/.gitconfig", home)); | |
417 | if (!access(user_config, R_OK)) | |
418 | ret = git_config_from_file(fn, user_config); | |
419 | free(user_config); | |
420 | } | |
421 | ||
422 | ret += git_config_from_file(fn, filename); | |
423 | free(repo_config); | |
424 | return ret; | |
425 | } | |
426 | ||
427 | /* | |
428 | * Find all the stuff for git_config_set() below. | |
429 | */ | |
430 | ||
431 | #define MAX_MATCHES 512 | |
432 | ||
433 | static struct { | |
434 | int baselen; | |
435 | char* key; | |
436 | int do_not_match; | |
437 | regex_t* value_regex; | |
438 | int multi_replace; | |
439 | size_t offset[MAX_MATCHES]; | |
440 | enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state; | |
441 | int seen; | |
442 | } store; | |
443 | ||
444 | static int matches(const char* key, const char* value) | |
445 | { | |
446 | return !strcmp(key, store.key) && | |
447 | (store.value_regex == NULL || | |
448 | (store.do_not_match ^ | |
449 | !regexec(store.value_regex, value, 0, NULL, 0))); | |
450 | } | |
451 | ||
452 | static int store_aux(const char* key, const char* value) | |
453 | { | |
454 | switch (store.state) { | |
455 | case KEY_SEEN: | |
456 | if (matches(key, value)) { | |
457 | if (store.seen == 1 && store.multi_replace == 0) { | |
458 | fprintf(stderr, | |
459 | "Warning: %s has multiple values\n", | |
460 | key); | |
461 | } else if (store.seen >= MAX_MATCHES) { | |
462 | fprintf(stderr, "Too many matches\n"); | |
463 | return 1; | |
464 | } | |
465 | ||
466 | store.offset[store.seen] = ftell(config_file); | |
467 | store.seen++; | |
468 | } | |
469 | break; | |
470 | case SECTION_SEEN: | |
471 | if (strncmp(key, store.key, store.baselen+1)) { | |
472 | store.state = SECTION_END_SEEN; | |
473 | break; | |
474 | } else | |
475 | /* do not increment matches: this is no match */ | |
476 | store.offset[store.seen] = ftell(config_file); | |
477 | /* fallthru */ | |
478 | case SECTION_END_SEEN: | |
479 | case START: | |
480 | if (matches(key, value)) { | |
481 | store.offset[store.seen] = ftell(config_file); | |
482 | store.state = KEY_SEEN; | |
483 | store.seen++; | |
484 | } else { | |
485 | if (strrchr(key, '.') - key == store.baselen && | |
486 | !strncmp(key, store.key, store.baselen)) { | |
487 | store.state = SECTION_SEEN; | |
488 | store.offset[store.seen] = ftell(config_file); | |
489 | } | |
490 | } | |
491 | } | |
492 | return 0; | |
493 | } | |
494 | ||
495 | static int write_error() | |
496 | { | |
497 | fprintf(stderr, "Failed to write new configuration file\n"); | |
498 | ||
499 | /* Same error code as "failed to rename". */ | |
500 | return 4; | |
501 | } | |
502 | ||
503 | static int store_write_section(int fd, const char* key) | |
504 | { | |
505 | const char *dot = strchr(key, '.'); | |
506 | int len1 = store.baselen, len2 = -1; | |
507 | ||
508 | dot = strchr(key, '.'); | |
509 | if (dot) { | |
510 | int dotlen = dot - key; | |
511 | if (dotlen < len1) { | |
512 | len2 = len1 - dotlen - 1; | |
513 | len1 = dotlen; | |
514 | } | |
515 | } | |
516 | ||
517 | if (write_in_full(fd, "[", 1) != 1 || | |
518 | write_in_full(fd, key, len1) != len1) | |
519 | return 0; | |
520 | if (len2 >= 0) { | |
521 | if (write_in_full(fd, " \"", 2) != 2) | |
522 | return 0; | |
523 | while (--len2 >= 0) { | |
524 | unsigned char c = *++dot; | |
525 | if (c == '"') | |
526 | if (write_in_full(fd, "\\", 1) != 1) | |
527 | return 0; | |
528 | if (write_in_full(fd, &c, 1) != 1) | |
529 | return 0; | |
530 | } | |
531 | if (write_in_full(fd, "\"", 1) != 1) | |
532 | return 0; | |
533 | } | |
534 | if (write_in_full(fd, "]\n", 2) != 2) | |
535 | return 0; | |
536 | ||
537 | return 1; | |
538 | } | |
539 | ||
540 | static int store_write_pair(int fd, const char* key, const char* value) | |
541 | { | |
542 | int i; | |
543 | int length = strlen(key+store.baselen+1); | |
544 | int quote = 0; | |
545 | ||
546 | /* Check to see if the value needs to be quoted. */ | |
547 | if (value[0] == ' ') | |
548 | quote = 1; | |
549 | for (i = 0; value[i]; i++) | |
550 | if (value[i] == ';' || value[i] == '#') | |
551 | quote = 1; | |
552 | if (value[i-1] == ' ') | |
553 | quote = 1; | |
554 | ||
555 | if (write_in_full(fd, "\t", 1) != 1 || | |
556 | write_in_full(fd, key+store.baselen+1, length) != length || | |
557 | write_in_full(fd, " = ", 3) != 3) | |
558 | return 0; | |
559 | if (quote && write_in_full(fd, "\"", 1) != 1) | |
560 | return 0; | |
561 | for (i = 0; value[i]; i++) | |
562 | switch (value[i]) { | |
563 | case '\n': | |
564 | if (write_in_full(fd, "\\n", 2) != 2) | |
565 | return 0; | |
566 | break; | |
567 | case '\t': | |
568 | if (write_in_full(fd, "\\t", 2) != 2) | |
569 | return 0; | |
570 | break; | |
571 | case '"': | |
572 | case '\\': | |
573 | if (write_in_full(fd, "\\", 1) != 1) | |
574 | return 0; | |
575 | default: | |
576 | if (write_in_full(fd, value+i, 1) != 1) | |
577 | return 0; | |
578 | break; | |
579 | } | |
580 | if (quote && write_in_full(fd, "\"", 1) != 1) | |
581 | return 0; | |
582 | if (write_in_full(fd, "\n", 1) != 1) | |
583 | return 0; | |
584 | return 1; | |
585 | } | |
586 | ||
587 | static ssize_t find_beginning_of_line(const char* contents, size_t size, | |
588 | size_t offset_, int* found_bracket) | |
589 | { | |
590 | size_t equal_offset = size, bracket_offset = size; | |
591 | ssize_t offset; | |
592 | ||
593 | for (offset = offset_-2; offset > 0 | |
594 | && contents[offset] != '\n'; offset--) | |
595 | switch (contents[offset]) { | |
596 | case '=': equal_offset = offset; break; | |
597 | case ']': bracket_offset = offset; break; | |
598 | } | |
599 | if (bracket_offset < equal_offset) { | |
600 | *found_bracket = 1; | |
601 | offset = bracket_offset+1; | |
602 | } else | |
603 | offset++; | |
604 | ||
605 | return offset; | |
606 | } | |
607 | ||
608 | int git_config_set(const char* key, const char* value) | |
609 | { | |
610 | return git_config_set_multivar(key, value, NULL, 0); | |
611 | } | |
612 | ||
613 | /* | |
614 | * If value==NULL, unset in (remove from) config, | |
615 | * if value_regex!=NULL, disregard key/value pairs where value does not match. | |
616 | * if multi_replace==0, nothing, or only one matching key/value is replaced, | |
617 | * else all matching key/values (regardless how many) are removed, | |
618 | * before the new pair is written. | |
619 | * | |
620 | * Returns 0 on success. | |
621 | * | |
622 | * This function does this: | |
623 | * | |
624 | * - it locks the config file by creating ".git/config.lock" | |
625 | * | |
626 | * - it then parses the config using store_aux() as validator to find | |
627 | * the position on the key/value pair to replace. If it is to be unset, | |
628 | * it must be found exactly once. | |
629 | * | |
630 | * - the config file is mmap()ed and the part before the match (if any) is | |
631 | * written to the lock file, then the changed part and the rest. | |
632 | * | |
633 | * - the config file is removed and the lock file rename()d to it. | |
634 | * | |
635 | */ | |
636 | int git_config_set_multivar(const char* key, const char* value, | |
637 | const char* value_regex, int multi_replace) | |
638 | { | |
639 | int i, dot; | |
640 | int fd = -1, in_fd; | |
641 | int ret; | |
642 | char* config_filename; | |
643 | char* lock_file; | |
644 | const char* last_dot = strrchr(key, '.'); | |
645 | ||
646 | config_filename = getenv(CONFIG_ENVIRONMENT); | |
647 | if (!config_filename) { | |
648 | config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT); | |
649 | if (!config_filename) | |
650 | config_filename = git_path("config"); | |
651 | } | |
652 | config_filename = xstrdup(config_filename); | |
653 | lock_file = xstrdup(mkpath("%s.lock", config_filename)); | |
654 | ||
655 | /* | |
656 | * Since "key" actually contains the section name and the real | |
657 | * key name separated by a dot, we have to know where the dot is. | |
658 | */ | |
659 | ||
660 | if (last_dot == NULL) { | |
661 | fprintf(stderr, "key does not contain a section: %s\n", key); | |
662 | ret = 2; | |
663 | goto out_free; | |
664 | } | |
665 | store.baselen = last_dot - key; | |
666 | ||
667 | store.multi_replace = multi_replace; | |
668 | ||
669 | /* | |
670 | * Validate the key and while at it, lower case it for matching. | |
671 | */ | |
672 | store.key = xmalloc(strlen(key) + 1); | |
673 | dot = 0; | |
674 | for (i = 0; key[i]; i++) { | |
675 | unsigned char c = key[i]; | |
676 | if (c == '.') | |
677 | dot = 1; | |
678 | /* Leave the extended basename untouched.. */ | |
679 | if (!dot || i > store.baselen) { | |
680 | if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) { | |
681 | fprintf(stderr, "invalid key: %s\n", key); | |
682 | free(store.key); | |
683 | ret = 1; | |
684 | goto out_free; | |
685 | } | |
686 | c = tolower(c); | |
687 | } else if (c == '\n') { | |
688 | fprintf(stderr, "invalid key (newline): %s\n", key); | |
689 | free(store.key); | |
690 | ret = 1; | |
691 | goto out_free; | |
692 | } | |
693 | store.key[i] = c; | |
694 | } | |
695 | store.key[i] = 0; | |
696 | ||
697 | /* | |
698 | * The lock_file serves a purpose in addition to locking: the new | |
699 | * contents of .git/config will be written into it. | |
700 | */ | |
701 | fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
702 | if (fd < 0 || adjust_shared_perm(lock_file)) { | |
703 | fprintf(stderr, "could not lock config file\n"); | |
704 | free(store.key); | |
705 | ret = -1; | |
706 | goto out_free; | |
707 | } | |
708 | ||
709 | /* | |
710 | * If .git/config does not exist yet, write a minimal version. | |
711 | */ | |
712 | in_fd = open(config_filename, O_RDONLY); | |
713 | if ( in_fd < 0 ) { | |
714 | free(store.key); | |
715 | ||
716 | if ( ENOENT != errno ) { | |
717 | error("opening %s: %s", config_filename, | |
718 | strerror(errno)); | |
719 | ret = 3; /* same as "invalid config file" */ | |
720 | goto out_free; | |
721 | } | |
722 | /* if nothing to unset, error out */ | |
723 | if (value == NULL) { | |
724 | ret = 5; | |
725 | goto out_free; | |
726 | } | |
727 | ||
728 | store.key = (char*)key; | |
729 | if (!store_write_section(fd, key) || | |
730 | !store_write_pair(fd, key, value)) | |
731 | goto write_err_out; | |
732 | } else { | |
733 | struct stat st; | |
734 | char* contents; | |
735 | size_t contents_sz, copy_begin, copy_end; | |
736 | int i, new_line = 0; | |
737 | ||
738 | if (value_regex == NULL) | |
739 | store.value_regex = NULL; | |
740 | else { | |
741 | if (value_regex[0] == '!') { | |
742 | store.do_not_match = 1; | |
743 | value_regex++; | |
744 | } else | |
745 | store.do_not_match = 0; | |
746 | ||
747 | store.value_regex = (regex_t*)xmalloc(sizeof(regex_t)); | |
748 | if (regcomp(store.value_regex, value_regex, | |
749 | REG_EXTENDED)) { | |
750 | fprintf(stderr, "Invalid pattern: %s\n", | |
751 | value_regex); | |
752 | free(store.value_regex); | |
753 | ret = 6; | |
754 | goto out_free; | |
755 | } | |
756 | } | |
757 | ||
758 | store.offset[0] = 0; | |
759 | store.state = START; | |
760 | store.seen = 0; | |
761 | ||
762 | /* | |
763 | * After this, store.offset will contain the *end* offset | |
764 | * of the last match, or remain at 0 if no match was found. | |
765 | * As a side effect, we make sure to transform only a valid | |
766 | * existing config file. | |
767 | */ | |
768 | if (git_config_from_file(store_aux, config_filename)) { | |
769 | fprintf(stderr, "invalid config file\n"); | |
770 | free(store.key); | |
771 | if (store.value_regex != NULL) { | |
772 | regfree(store.value_regex); | |
773 | free(store.value_regex); | |
774 | } | |
775 | ret = 3; | |
776 | goto out_free; | |
777 | } | |
778 | ||
779 | free(store.key); | |
780 | if (store.value_regex != NULL) { | |
781 | regfree(store.value_regex); | |
782 | free(store.value_regex); | |
783 | } | |
784 | ||
785 | /* if nothing to unset, or too many matches, error out */ | |
786 | if ((store.seen == 0 && value == NULL) || | |
787 | (store.seen > 1 && multi_replace == 0)) { | |
788 | ret = 5; | |
789 | goto out_free; | |
790 | } | |
791 | ||
792 | fstat(in_fd, &st); | |
793 | contents_sz = xsize_t(st.st_size); | |
794 | contents = xmmap(NULL, contents_sz, PROT_READ, | |
795 | MAP_PRIVATE, in_fd, 0); | |
796 | close(in_fd); | |
797 | ||
798 | if (store.seen == 0) | |
799 | store.seen = 1; | |
800 | ||
801 | for (i = 0, copy_begin = 0; i < store.seen; i++) { | |
802 | if (store.offset[i] == 0) { | |
803 | store.offset[i] = copy_end = contents_sz; | |
804 | } else if (store.state != KEY_SEEN) { | |
805 | copy_end = store.offset[i]; | |
806 | } else | |
807 | copy_end = find_beginning_of_line( | |
808 | contents, contents_sz, | |
809 | store.offset[i]-2, &new_line); | |
810 | ||
811 | /* write the first part of the config */ | |
812 | if (copy_end > copy_begin) { | |
813 | if (write_in_full(fd, contents + copy_begin, | |
814 | copy_end - copy_begin) < | |
815 | copy_end - copy_begin) | |
816 | goto write_err_out; | |
817 | if (new_line && | |
818 | write_in_full(fd, "\n", 1) != 1) | |
819 | goto write_err_out; | |
820 | } | |
821 | copy_begin = store.offset[i]; | |
822 | } | |
823 | ||
824 | /* write the pair (value == NULL means unset) */ | |
825 | if (value != NULL) { | |
826 | if (store.state == START) { | |
827 | if (!store_write_section(fd, key)) | |
828 | goto write_err_out; | |
829 | } | |
830 | if (!store_write_pair(fd, key, value)) | |
831 | goto write_err_out; | |
832 | } | |
833 | ||
834 | /* write the rest of the config */ | |
835 | if (copy_begin < contents_sz) | |
836 | if (write_in_full(fd, contents + copy_begin, | |
837 | contents_sz - copy_begin) < | |
838 | contents_sz - copy_begin) | |
839 | goto write_err_out; | |
840 | ||
841 | munmap(contents, contents_sz); | |
842 | unlink(config_filename); | |
843 | } | |
844 | ||
845 | if (rename(lock_file, config_filename) < 0) { | |
846 | fprintf(stderr, "Could not rename the lock file?\n"); | |
847 | ret = 4; | |
848 | goto out_free; | |
849 | } | |
850 | ||
851 | ret = 0; | |
852 | ||
853 | out_free: | |
854 | if (0 <= fd) | |
855 | close(fd); | |
856 | free(config_filename); | |
857 | if (lock_file) { | |
858 | unlink(lock_file); | |
859 | free(lock_file); | |
860 | } | |
861 | return ret; | |
862 | ||
863 | write_err_out: | |
864 | ret = write_error(); | |
865 | goto out_free; | |
866 | ||
867 | } | |
868 | ||
869 | static int section_name_match (const char *buf, const char *name) | |
870 | { | |
871 | int i = 0, j = 0, dot = 0; | |
872 | for (; buf[i] && buf[i] != ']'; i++) { | |
873 | if (!dot && isspace(buf[i])) { | |
874 | dot = 1; | |
875 | if (name[j++] != '.') | |
876 | break; | |
877 | for (i++; isspace(buf[i]); i++) | |
878 | ; /* do nothing */ | |
879 | if (buf[i] != '"') | |
880 | break; | |
881 | continue; | |
882 | } | |
883 | if (buf[i] == '\\' && dot) | |
884 | i++; | |
885 | else if (buf[i] == '"' && dot) { | |
886 | for (i++; isspace(buf[i]); i++) | |
887 | ; /* do_nothing */ | |
888 | break; | |
889 | } | |
890 | if (buf[i] != name[j++]) | |
891 | break; | |
892 | } | |
893 | return (buf[i] == ']' && name[j] == 0); | |
894 | } | |
895 | ||
896 | /* if new_name == NULL, the section is removed instead */ | |
897 | int git_config_rename_section(const char *old_name, const char *new_name) | |
898 | { | |
899 | int ret = 0, remove = 0; | |
900 | char *config_filename; | |
901 | struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1); | |
902 | int out_fd; | |
903 | char buf[1024]; | |
904 | ||
905 | config_filename = getenv(CONFIG_ENVIRONMENT); | |
906 | if (!config_filename) { | |
907 | config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT); | |
908 | if (!config_filename) | |
909 | config_filename = git_path("config"); | |
910 | } | |
911 | config_filename = xstrdup(config_filename); | |
912 | out_fd = hold_lock_file_for_update(lock, config_filename, 0); | |
913 | if (out_fd < 0) { | |
914 | ret = error("Could not lock config file!"); | |
915 | goto out; | |
916 | } | |
917 | ||
918 | if (!(config_file = fopen(config_filename, "rb"))) { | |
919 | ret = error("Could not open config file!"); | |
920 | goto out; | |
921 | } | |
922 | ||
923 | while (fgets(buf, sizeof(buf), config_file)) { | |
924 | int i; | |
925 | int length; | |
926 | for (i = 0; buf[i] && isspace(buf[i]); i++) | |
927 | ; /* do nothing */ | |
928 | if (buf[i] == '[') { | |
929 | /* it's a section */ | |
930 | if (section_name_match (&buf[i+1], old_name)) { | |
931 | ret++; | |
932 | if (new_name == NULL) { | |
933 | remove = 1; | |
934 | continue; | |
935 | } | |
936 | store.baselen = strlen(new_name); | |
937 | if (!store_write_section(out_fd, new_name)) { | |
938 | ret = write_error(); | |
939 | goto out; | |
940 | } | |
941 | continue; | |
942 | } | |
943 | remove = 0; | |
944 | } | |
945 | if (remove) | |
946 | continue; | |
947 | length = strlen(buf); | |
948 | if (write_in_full(out_fd, buf, length) != length) { | |
949 | ret = write_error(); | |
950 | goto out; | |
951 | } | |
952 | } | |
953 | fclose(config_file); | |
954 | if (close(out_fd) || commit_lock_file(lock) < 0) | |
955 | ret = error("Cannot commit config file!"); | |
956 | out: | |
957 | free(config_filename); | |
958 | return ret; | |
959 | } | |
960 |