]>
Commit | Line | Data |
---|---|---|
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 | #include "exec_cmd.h" | |
10 | ||
11 | #define MAXNAME (256) | |
12 | ||
13 | static FILE *config_file; | |
14 | static const char *config_file_name; | |
15 | static int config_linenr; | |
16 | static int config_file_eof; | |
17 | static int zlib_compression_seen; | |
18 | ||
19 | static int get_next_char(void) | |
20 | { | |
21 | int c; | |
22 | FILE *f; | |
23 | ||
24 | c = '\n'; | |
25 | if ((f = config_file) != NULL) { | |
26 | c = fgetc(f); | |
27 | if (c == '\r') { | |
28 | /* DOS like systems */ | |
29 | c = fgetc(f); | |
30 | if (c != '\n') { | |
31 | ungetc(c, f); | |
32 | c = '\r'; | |
33 | } | |
34 | } | |
35 | if (c == '\n') | |
36 | config_linenr++; | |
37 | if (c == EOF) { | |
38 | config_file_eof = 1; | |
39 | c = '\n'; | |
40 | } | |
41 | } | |
42 | return c; | |
43 | } | |
44 | ||
45 | static char *parse_value(void) | |
46 | { | |
47 | static char value[1024]; | |
48 | int quote = 0, comment = 0, len = 0, space = 0; | |
49 | ||
50 | for (;;) { | |
51 | int c = get_next_char(); | |
52 | if (len >= sizeof(value)) | |
53 | return NULL; | |
54 | if (c == '\n') { | |
55 | if (quote) | |
56 | return NULL; | |
57 | value[len] = 0; | |
58 | return value; | |
59 | } | |
60 | if (comment) | |
61 | continue; | |
62 | if (isspace(c) && !quote) { | |
63 | space = 1; | |
64 | continue; | |
65 | } | |
66 | if (!quote) { | |
67 | if (c == ';' || c == '#') { | |
68 | comment = 1; | |
69 | continue; | |
70 | } | |
71 | } | |
72 | if (space) { | |
73 | if (len) | |
74 | value[len++] = ' '; | |
75 | space = 0; | |
76 | } | |
77 | if (c == '\\') { | |
78 | c = get_next_char(); | |
79 | switch (c) { | |
80 | case '\n': | |
81 | continue; | |
82 | case 't': | |
83 | c = '\t'; | |
84 | break; | |
85 | case 'b': | |
86 | c = '\b'; | |
87 | break; | |
88 | case 'n': | |
89 | c = '\n'; | |
90 | break; | |
91 | /* Some characters escape as themselves */ | |
92 | case '\\': case '"': | |
93 | break; | |
94 | /* Reject unknown escape sequences */ | |
95 | default: | |
96 | return NULL; | |
97 | } | |
98 | value[len++] = c; | |
99 | continue; | |
100 | } | |
101 | if (c == '"') { | |
102 | quote = 1-quote; | |
103 | continue; | |
104 | } | |
105 | value[len++] = c; | |
106 | } | |
107 | } | |
108 | ||
109 | static inline int iskeychar(int c) | |
110 | { | |
111 | return isalnum(c) || c == '-'; | |
112 | } | |
113 | ||
114 | static int get_value(config_fn_t fn, char *name, unsigned int len) | |
115 | { | |
116 | int c; | |
117 | char *value; | |
118 | ||
119 | /* Get the full name */ | |
120 | for (;;) { | |
121 | c = get_next_char(); | |
122 | if (config_file_eof) | |
123 | break; | |
124 | if (!iskeychar(c)) | |
125 | break; | |
126 | name[len++] = tolower(c); | |
127 | if (len >= MAXNAME) | |
128 | return -1; | |
129 | } | |
130 | name[len] = 0; | |
131 | while (c == ' ' || c == '\t') | |
132 | c = get_next_char(); | |
133 | ||
134 | value = NULL; | |
135 | if (c != '\n') { | |
136 | if (c != '=') | |
137 | return -1; | |
138 | value = parse_value(); | |
139 | if (!value) | |
140 | return -1; | |
141 | } | |
142 | return fn(name, value); | |
143 | } | |
144 | ||
145 | static int get_extended_base_var(char *name, int baselen, int c) | |
146 | { | |
147 | do { | |
148 | if (c == '\n') | |
149 | return -1; | |
150 | c = get_next_char(); | |
151 | } while (isspace(c)); | |
152 | ||
153 | /* We require the format to be '[base "extension"]' */ | |
154 | if (c != '"') | |
155 | return -1; | |
156 | name[baselen++] = '.'; | |
157 | ||
158 | for (;;) { | |
159 | int c = get_next_char(); | |
160 | if (c == '\n') | |
161 | return -1; | |
162 | if (c == '"') | |
163 | break; | |
164 | if (c == '\\') { | |
165 | c = get_next_char(); | |
166 | if (c == '\n') | |
167 | return -1; | |
168 | } | |
169 | name[baselen++] = c; | |
170 | if (baselen > MAXNAME / 2) | |
171 | return -1; | |
172 | } | |
173 | ||
174 | /* Final ']' */ | |
175 | if (get_next_char() != ']') | |
176 | return -1; | |
177 | return baselen; | |
178 | } | |
179 | ||
180 | static int get_base_var(char *name) | |
181 | { | |
182 | int baselen = 0; | |
183 | ||
184 | for (;;) { | |
185 | int c = get_next_char(); | |
186 | if (config_file_eof) | |
187 | return -1; | |
188 | if (c == ']') | |
189 | return baselen; | |
190 | if (isspace(c)) | |
191 | return get_extended_base_var(name, baselen, c); | |
192 | if (!iskeychar(c) && c != '.') | |
193 | return -1; | |
194 | if (baselen > MAXNAME / 2) | |
195 | return -1; | |
196 | name[baselen++] = tolower(c); | |
197 | } | |
198 | } | |
199 | ||
200 | static int git_parse_file(config_fn_t fn) | |
201 | { | |
202 | int comment = 0; | |
203 | int baselen = 0; | |
204 | static char var[MAXNAME]; | |
205 | ||
206 | for (;;) { | |
207 | int c = get_next_char(); | |
208 | if (c == '\n') { | |
209 | if (config_file_eof) | |
210 | return 0; | |
211 | comment = 0; | |
212 | continue; | |
213 | } | |
214 | if (comment || isspace(c)) | |
215 | continue; | |
216 | if (c == '#' || c == ';') { | |
217 | comment = 1; | |
218 | continue; | |
219 | } | |
220 | if (c == '[') { | |
221 | baselen = get_base_var(var); | |
222 | if (baselen <= 0) | |
223 | break; | |
224 | var[baselen++] = '.'; | |
225 | var[baselen] = 0; | |
226 | continue; | |
227 | } | |
228 | if (!isalpha(c)) | |
229 | break; | |
230 | var[baselen] = tolower(c); | |
231 | if (get_value(fn, var, baselen+1) < 0) | |
232 | break; | |
233 | } | |
234 | die("bad config file line %d in %s", config_linenr, config_file_name); | |
235 | } | |
236 | ||
237 | static int parse_unit_factor(const char *end, unsigned long *val) | |
238 | { | |
239 | if (!*end) | |
240 | return 1; | |
241 | else if (!strcasecmp(end, "k")) { | |
242 | *val *= 1024; | |
243 | return 1; | |
244 | } | |
245 | else if (!strcasecmp(end, "m")) { | |
246 | *val *= 1024 * 1024; | |
247 | return 1; | |
248 | } | |
249 | else if (!strcasecmp(end, "g")) { | |
250 | *val *= 1024 * 1024 * 1024; | |
251 | return 1; | |
252 | } | |
253 | return 0; | |
254 | } | |
255 | ||
256 | int git_parse_long(const char *value, long *ret) | |
257 | { | |
258 | if (value && *value) { | |
259 | char *end; | |
260 | long val = strtol(value, &end, 0); | |
261 | unsigned long factor = 1; | |
262 | if (!parse_unit_factor(end, &factor)) | |
263 | return 0; | |
264 | *ret = val * factor; | |
265 | return 1; | |
266 | } | |
267 | return 0; | |
268 | } | |
269 | ||
270 | int git_parse_ulong(const char *value, unsigned long *ret) | |
271 | { | |
272 | if (value && *value) { | |
273 | char *end; | |
274 | unsigned long val = strtoul(value, &end, 0); | |
275 | if (!parse_unit_factor(end, &val)) | |
276 | return 0; | |
277 | *ret = val; | |
278 | return 1; | |
279 | } | |
280 | return 0; | |
281 | } | |
282 | ||
283 | int git_config_int(const char *name, const char *value) | |
284 | { | |
285 | long ret; | |
286 | if (!git_parse_long(value, &ret)) | |
287 | die("bad config value for '%s' in %s", name, config_file_name); | |
288 | return ret; | |
289 | } | |
290 | ||
291 | unsigned long git_config_ulong(const char *name, const char *value) | |
292 | { | |
293 | unsigned long ret; | |
294 | if (!git_parse_ulong(value, &ret)) | |
295 | die("bad config value for '%s' in %s", name, config_file_name); | |
296 | return ret; | |
297 | } | |
298 | ||
299 | int git_config_bool(const char *name, const char *value) | |
300 | { | |
301 | if (!value) | |
302 | return 1; | |
303 | if (!*value) | |
304 | return 0; | |
305 | if (!strcasecmp(value, "true") || !strcasecmp(value, "yes")) | |
306 | return 1; | |
307 | if (!strcasecmp(value, "false") || !strcasecmp(value, "no")) | |
308 | return 0; | |
309 | return git_config_int(name, value) != 0; | |
310 | } | |
311 | ||
312 | int git_default_config(const char *var, const char *value) | |
313 | { | |
314 | /* This needs a better name */ | |
315 | if (!strcmp(var, "core.filemode")) { | |
316 | trust_executable_bit = git_config_bool(var, value); | |
317 | return 0; | |
318 | } | |
319 | ||
320 | if (!strcmp(var, "core.quotepath")) { | |
321 | quote_path_fully = git_config_bool(var, value); | |
322 | return 0; | |
323 | } | |
324 | ||
325 | if (!strcmp(var, "core.symlinks")) { | |
326 | has_symlinks = git_config_bool(var, value); | |
327 | return 0; | |
328 | } | |
329 | ||
330 | if (!strcmp(var, "core.bare")) { | |
331 | is_bare_repository_cfg = git_config_bool(var, value); | |
332 | return 0; | |
333 | } | |
334 | ||
335 | if (!strcmp(var, "core.ignorestat")) { | |
336 | assume_unchanged = git_config_bool(var, value); | |
337 | return 0; | |
338 | } | |
339 | ||
340 | if (!strcmp(var, "core.prefersymlinkrefs")) { | |
341 | prefer_symlink_refs = git_config_bool(var, value); | |
342 | return 0; | |
343 | } | |
344 | ||
345 | if (!strcmp(var, "core.logallrefupdates")) { | |
346 | log_all_ref_updates = git_config_bool(var, value); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | if (!strcmp(var, "core.warnambiguousrefs")) { | |
351 | warn_ambiguous_refs = git_config_bool(var, value); | |
352 | return 0; | |
353 | } | |
354 | ||
355 | if (!strcmp(var, "core.loosecompression")) { | |
356 | int level = git_config_int(var, value); | |
357 | if (level == -1) | |
358 | level = Z_DEFAULT_COMPRESSION; | |
359 | else if (level < 0 || level > Z_BEST_COMPRESSION) | |
360 | die("bad zlib compression level %d", level); | |
361 | zlib_compression_level = level; | |
362 | zlib_compression_seen = 1; | |
363 | return 0; | |
364 | } | |
365 | ||
366 | if (!strcmp(var, "core.compression")) { | |
367 | int level = git_config_int(var, value); | |
368 | if (level == -1) | |
369 | level = Z_DEFAULT_COMPRESSION; | |
370 | else if (level < 0 || level > Z_BEST_COMPRESSION) | |
371 | die("bad zlib compression level %d", level); | |
372 | core_compression_level = level; | |
373 | core_compression_seen = 1; | |
374 | if (!zlib_compression_seen) | |
375 | zlib_compression_level = level; | |
376 | return 0; | |
377 | } | |
378 | ||
379 | if (!strcmp(var, "core.packedgitwindowsize")) { | |
380 | int pgsz_x2 = getpagesize() * 2; | |
381 | packed_git_window_size = git_config_int(var, value); | |
382 | ||
383 | /* This value must be multiple of (pagesize * 2) */ | |
384 | packed_git_window_size /= pgsz_x2; | |
385 | if (packed_git_window_size < 1) | |
386 | packed_git_window_size = 1; | |
387 | packed_git_window_size *= pgsz_x2; | |
388 | return 0; | |
389 | } | |
390 | ||
391 | if (!strcmp(var, "core.packedgitlimit")) { | |
392 | packed_git_limit = git_config_int(var, value); | |
393 | return 0; | |
394 | } | |
395 | ||
396 | if (!strcmp(var, "core.deltabasecachelimit")) { | |
397 | delta_base_cache_limit = git_config_int(var, value); | |
398 | return 0; | |
399 | } | |
400 | ||
401 | if (!strcmp(var, "core.autocrlf")) { | |
402 | if (value && !strcasecmp(value, "input")) { | |
403 | auto_crlf = -1; | |
404 | return 0; | |
405 | } | |
406 | auto_crlf = git_config_bool(var, value); | |
407 | return 0; | |
408 | } | |
409 | ||
410 | if (!strcmp(var, "user.name")) { | |
411 | strlcpy(git_default_name, value, sizeof(git_default_name)); | |
412 | return 0; | |
413 | } | |
414 | ||
415 | if (!strcmp(var, "user.email")) { | |
416 | strlcpy(git_default_email, value, sizeof(git_default_email)); | |
417 | return 0; | |
418 | } | |
419 | ||
420 | if (!strcmp(var, "i18n.commitencoding")) { | |
421 | git_commit_encoding = xstrdup(value); | |
422 | return 0; | |
423 | } | |
424 | ||
425 | if (!strcmp(var, "i18n.logoutputencoding")) { | |
426 | git_log_output_encoding = xstrdup(value); | |
427 | return 0; | |
428 | } | |
429 | ||
430 | ||
431 | if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) { | |
432 | pager_use_color = git_config_bool(var,value); | |
433 | return 0; | |
434 | } | |
435 | ||
436 | if (!strcmp(var, "core.pager")) { | |
437 | pager_program = xstrdup(value); | |
438 | return 0; | |
439 | } | |
440 | ||
441 | if (!strcmp(var, "core.editor")) { | |
442 | editor_program = xstrdup(value); | |
443 | return 0; | |
444 | } | |
445 | ||
446 | if (!strcmp(var, "core.excludesfile")) { | |
447 | if (!value) | |
448 | die("core.excludesfile without value"); | |
449 | excludes_file = xstrdup(value); | |
450 | return 0; | |
451 | } | |
452 | ||
453 | if (!strcmp(var, "core.whitespace")) { | |
454 | whitespace_rule_cfg = parse_whitespace_rule(value); | |
455 | return 0; | |
456 | } | |
457 | ||
458 | /* Add other config variables here and to Documentation/config.txt. */ | |
459 | return 0; | |
460 | } | |
461 | ||
462 | int git_config_from_file(config_fn_t fn, const char *filename) | |
463 | { | |
464 | int ret; | |
465 | FILE *f = fopen(filename, "r"); | |
466 | ||
467 | ret = -1; | |
468 | if (f) { | |
469 | config_file = f; | |
470 | config_file_name = filename; | |
471 | config_linenr = 1; | |
472 | config_file_eof = 0; | |
473 | ret = git_parse_file(fn); | |
474 | fclose(f); | |
475 | config_file_name = NULL; | |
476 | } | |
477 | return ret; | |
478 | } | |
479 | ||
480 | const char *git_etc_gitconfig(void) | |
481 | { | |
482 | static const char *system_wide; | |
483 | if (!system_wide) { | |
484 | system_wide = ETC_GITCONFIG; | |
485 | if (!is_absolute_path(system_wide)) { | |
486 | /* interpret path relative to exec-dir */ | |
487 | const char *exec_path = git_exec_path(); | |
488 | system_wide = prefix_path(exec_path, strlen(exec_path), | |
489 | system_wide); | |
490 | } | |
491 | } | |
492 | return system_wide; | |
493 | } | |
494 | ||
495 | int git_config(config_fn_t fn) | |
496 | { | |
497 | int ret = 0; | |
498 | char *repo_config = NULL; | |
499 | const char *home = NULL, *filename; | |
500 | ||
501 | /* $GIT_CONFIG makes git read _only_ the given config file, | |
502 | * $GIT_CONFIG_LOCAL will make it process it in addition to the | |
503 | * global config file, the same way it would the per-repository | |
504 | * config file otherwise. */ | |
505 | filename = getenv(CONFIG_ENVIRONMENT); | |
506 | if (!filename) { | |
507 | if (!access(git_etc_gitconfig(), R_OK)) | |
508 | ret += git_config_from_file(fn, git_etc_gitconfig()); | |
509 | home = getenv("HOME"); | |
510 | filename = getenv(CONFIG_LOCAL_ENVIRONMENT); | |
511 | if (!filename) | |
512 | filename = repo_config = xstrdup(git_path("config")); | |
513 | } | |
514 | ||
515 | if (home) { | |
516 | char *user_config = xstrdup(mkpath("%s/.gitconfig", home)); | |
517 | if (!access(user_config, R_OK)) | |
518 | ret = git_config_from_file(fn, user_config); | |
519 | free(user_config); | |
520 | } | |
521 | ||
522 | ret += git_config_from_file(fn, filename); | |
523 | free(repo_config); | |
524 | return ret; | |
525 | } | |
526 | ||
527 | /* | |
528 | * Find all the stuff for git_config_set() below. | |
529 | */ | |
530 | ||
531 | #define MAX_MATCHES 512 | |
532 | ||
533 | static struct { | |
534 | int baselen; | |
535 | char* key; | |
536 | int do_not_match; | |
537 | regex_t* value_regex; | |
538 | int multi_replace; | |
539 | size_t offset[MAX_MATCHES]; | |
540 | enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state; | |
541 | int seen; | |
542 | } store; | |
543 | ||
544 | static int matches(const char* key, const char* value) | |
545 | { | |
546 | return !strcmp(key, store.key) && | |
547 | (store.value_regex == NULL || | |
548 | (store.do_not_match ^ | |
549 | !regexec(store.value_regex, value, 0, NULL, 0))); | |
550 | } | |
551 | ||
552 | static int store_aux(const char* key, const char* value) | |
553 | { | |
554 | const char *ep; | |
555 | size_t section_len; | |
556 | ||
557 | switch (store.state) { | |
558 | case KEY_SEEN: | |
559 | if (matches(key, value)) { | |
560 | if (store.seen == 1 && store.multi_replace == 0) { | |
561 | fprintf(stderr, | |
562 | "Warning: %s has multiple values\n", | |
563 | key); | |
564 | } else if (store.seen >= MAX_MATCHES) { | |
565 | fprintf(stderr, "Too many matches\n"); | |
566 | return 1; | |
567 | } | |
568 | ||
569 | store.offset[store.seen] = ftell(config_file); | |
570 | store.seen++; | |
571 | } | |
572 | break; | |
573 | case SECTION_SEEN: | |
574 | /* | |
575 | * What we are looking for is in store.key (both | |
576 | * section and var), and its section part is baselen | |
577 | * long. We found key (again, both section and var). | |
578 | * We would want to know if this key is in the same | |
579 | * section as what we are looking for. We already | |
580 | * know we are in the same section as what should | |
581 | * hold store.key. | |
582 | */ | |
583 | ep = strrchr(key, '.'); | |
584 | section_len = ep - key; | |
585 | ||
586 | if ((section_len != store.baselen) || | |
587 | memcmp(key, store.key, section_len+1)) { | |
588 | store.state = SECTION_END_SEEN; | |
589 | break; | |
590 | } | |
591 | ||
592 | /* | |
593 | * Do not increment matches: this is no match, but we | |
594 | * just made sure we are in the desired section. | |
595 | */ | |
596 | store.offset[store.seen] = ftell(config_file); | |
597 | /* fallthru */ | |
598 | case SECTION_END_SEEN: | |
599 | case START: | |
600 | if (matches(key, value)) { | |
601 | store.offset[store.seen] = ftell(config_file); | |
602 | store.state = KEY_SEEN; | |
603 | store.seen++; | |
604 | } else { | |
605 | if (strrchr(key, '.') - key == store.baselen && | |
606 | !strncmp(key, store.key, store.baselen)) { | |
607 | store.state = SECTION_SEEN; | |
608 | store.offset[store.seen] = ftell(config_file); | |
609 | } | |
610 | } | |
611 | } | |
612 | return 0; | |
613 | } | |
614 | ||
615 | static int write_error(void) | |
616 | { | |
617 | fprintf(stderr, "Failed to write new configuration file\n"); | |
618 | ||
619 | /* Same error code as "failed to rename". */ | |
620 | return 4; | |
621 | } | |
622 | ||
623 | static int store_write_section(int fd, const char* key) | |
624 | { | |
625 | const char *dot; | |
626 | int i, success; | |
627 | struct strbuf sb; | |
628 | ||
629 | strbuf_init(&sb, 0); | |
630 | dot = memchr(key, '.', store.baselen); | |
631 | if (dot) { | |
632 | strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key); | |
633 | for (i = dot - key + 1; i < store.baselen; i++) { | |
634 | if (key[i] == '"') | |
635 | strbuf_addch(&sb, '\\'); | |
636 | strbuf_addch(&sb, key[i]); | |
637 | } | |
638 | strbuf_addstr(&sb, "\"]\n"); | |
639 | } else { | |
640 | strbuf_addf(&sb, "[%.*s]\n", store.baselen, key); | |
641 | } | |
642 | ||
643 | success = write_in_full(fd, sb.buf, sb.len) == sb.len; | |
644 | strbuf_release(&sb); | |
645 | ||
646 | return success; | |
647 | } | |
648 | ||
649 | static int store_write_pair(int fd, const char* key, const char* value) | |
650 | { | |
651 | int i, success; | |
652 | int length = strlen(key + store.baselen + 1); | |
653 | const char *quote = ""; | |
654 | struct strbuf sb; | |
655 | ||
656 | /* | |
657 | * Check to see if the value needs to be surrounded with a dq pair. | |
658 | * Note that problematic characters are always backslash-quoted; this | |
659 | * check is about not losing leading or trailing SP and strings that | |
660 | * follow beginning-of-comment characters (i.e. ';' and '#') by the | |
661 | * configuration parser. | |
662 | */ | |
663 | if (value[0] == ' ') | |
664 | quote = "\""; | |
665 | for (i = 0; value[i]; i++) | |
666 | if (value[i] == ';' || value[i] == '#') | |
667 | quote = "\""; | |
668 | if (i && value[i - 1] == ' ') | |
669 | quote = "\""; | |
670 | ||
671 | strbuf_init(&sb, 0); | |
672 | strbuf_addf(&sb, "\t%.*s = %s", | |
673 | length, key + store.baselen + 1, quote); | |
674 | ||
675 | for (i = 0; value[i]; i++) | |
676 | switch (value[i]) { | |
677 | case '\n': | |
678 | strbuf_addstr(&sb, "\\n"); | |
679 | break; | |
680 | case '\t': | |
681 | strbuf_addstr(&sb, "\\t"); | |
682 | break; | |
683 | case '"': | |
684 | case '\\': | |
685 | strbuf_addch(&sb, '\\'); | |
686 | default: | |
687 | strbuf_addch(&sb, value[i]); | |
688 | break; | |
689 | } | |
690 | strbuf_addf(&sb, "%s\n", quote); | |
691 | ||
692 | success = write_in_full(fd, sb.buf, sb.len) == sb.len; | |
693 | strbuf_release(&sb); | |
694 | ||
695 | return success; | |
696 | } | |
697 | ||
698 | static ssize_t find_beginning_of_line(const char* contents, size_t size, | |
699 | size_t offset_, int* found_bracket) | |
700 | { | |
701 | size_t equal_offset = size, bracket_offset = size; | |
702 | ssize_t offset; | |
703 | ||
704 | for (offset = offset_-2; offset > 0 | |
705 | && contents[offset] != '\n'; offset--) | |
706 | switch (contents[offset]) { | |
707 | case '=': equal_offset = offset; break; | |
708 | case ']': bracket_offset = offset; break; | |
709 | } | |
710 | if (bracket_offset < equal_offset) { | |
711 | *found_bracket = 1; | |
712 | offset = bracket_offset+1; | |
713 | } else | |
714 | offset++; | |
715 | ||
716 | return offset; | |
717 | } | |
718 | ||
719 | int git_config_set(const char* key, const char* value) | |
720 | { | |
721 | return git_config_set_multivar(key, value, NULL, 0); | |
722 | } | |
723 | ||
724 | /* | |
725 | * If value==NULL, unset in (remove from) config, | |
726 | * if value_regex!=NULL, disregard key/value pairs where value does not match. | |
727 | * if multi_replace==0, nothing, or only one matching key/value is replaced, | |
728 | * else all matching key/values (regardless how many) are removed, | |
729 | * before the new pair is written. | |
730 | * | |
731 | * Returns 0 on success. | |
732 | * | |
733 | * This function does this: | |
734 | * | |
735 | * - it locks the config file by creating ".git/config.lock" | |
736 | * | |
737 | * - it then parses the config using store_aux() as validator to find | |
738 | * the position on the key/value pair to replace. If it is to be unset, | |
739 | * it must be found exactly once. | |
740 | * | |
741 | * - the config file is mmap()ed and the part before the match (if any) is | |
742 | * written to the lock file, then the changed part and the rest. | |
743 | * | |
744 | * - the config file is removed and the lock file rename()d to it. | |
745 | * | |
746 | */ | |
747 | int git_config_set_multivar(const char* key, const char* value, | |
748 | const char* value_regex, int multi_replace) | |
749 | { | |
750 | int i, dot; | |
751 | int fd = -1, in_fd; | |
752 | int ret; | |
753 | char* config_filename; | |
754 | struct lock_file *lock = NULL; | |
755 | const char* last_dot = strrchr(key, '.'); | |
756 | ||
757 | config_filename = getenv(CONFIG_ENVIRONMENT); | |
758 | if (!config_filename) { | |
759 | config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT); | |
760 | if (!config_filename) | |
761 | config_filename = git_path("config"); | |
762 | } | |
763 | config_filename = xstrdup(config_filename); | |
764 | ||
765 | /* | |
766 | * Since "key" actually contains the section name and the real | |
767 | * key name separated by a dot, we have to know where the dot is. | |
768 | */ | |
769 | ||
770 | if (last_dot == NULL) { | |
771 | fprintf(stderr, "key does not contain a section: %s\n", key); | |
772 | ret = 2; | |
773 | goto out_free; | |
774 | } | |
775 | store.baselen = last_dot - key; | |
776 | ||
777 | store.multi_replace = multi_replace; | |
778 | ||
779 | /* | |
780 | * Validate the key and while at it, lower case it for matching. | |
781 | */ | |
782 | store.key = xmalloc(strlen(key) + 1); | |
783 | dot = 0; | |
784 | for (i = 0; key[i]; i++) { | |
785 | unsigned char c = key[i]; | |
786 | if (c == '.') | |
787 | dot = 1; | |
788 | /* Leave the extended basename untouched.. */ | |
789 | if (!dot || i > store.baselen) { | |
790 | if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) { | |
791 | fprintf(stderr, "invalid key: %s\n", key); | |
792 | free(store.key); | |
793 | ret = 1; | |
794 | goto out_free; | |
795 | } | |
796 | c = tolower(c); | |
797 | } else if (c == '\n') { | |
798 | fprintf(stderr, "invalid key (newline): %s\n", key); | |
799 | free(store.key); | |
800 | ret = 1; | |
801 | goto out_free; | |
802 | } | |
803 | store.key[i] = c; | |
804 | } | |
805 | store.key[i] = 0; | |
806 | ||
807 | /* | |
808 | * The lock serves a purpose in addition to locking: the new | |
809 | * contents of .git/config will be written into it. | |
810 | */ | |
811 | lock = xcalloc(sizeof(struct lock_file), 1); | |
812 | fd = hold_lock_file_for_update(lock, config_filename, 0); | |
813 | if (fd < 0) { | |
814 | fprintf(stderr, "could not lock config file\n"); | |
815 | free(store.key); | |
816 | ret = -1; | |
817 | goto out_free; | |
818 | } | |
819 | ||
820 | /* | |
821 | * If .git/config does not exist yet, write a minimal version. | |
822 | */ | |
823 | in_fd = open(config_filename, O_RDONLY); | |
824 | if ( in_fd < 0 ) { | |
825 | free(store.key); | |
826 | ||
827 | if ( ENOENT != errno ) { | |
828 | error("opening %s: %s", config_filename, | |
829 | strerror(errno)); | |
830 | ret = 3; /* same as "invalid config file" */ | |
831 | goto out_free; | |
832 | } | |
833 | /* if nothing to unset, error out */ | |
834 | if (value == NULL) { | |
835 | ret = 5; | |
836 | goto out_free; | |
837 | } | |
838 | ||
839 | store.key = (char*)key; | |
840 | if (!store_write_section(fd, key) || | |
841 | !store_write_pair(fd, key, value)) | |
842 | goto write_err_out; | |
843 | } else { | |
844 | struct stat st; | |
845 | char* contents; | |
846 | size_t contents_sz, copy_begin, copy_end; | |
847 | int i, new_line = 0; | |
848 | ||
849 | if (value_regex == NULL) | |
850 | store.value_regex = NULL; | |
851 | else { | |
852 | if (value_regex[0] == '!') { | |
853 | store.do_not_match = 1; | |
854 | value_regex++; | |
855 | } else | |
856 | store.do_not_match = 0; | |
857 | ||
858 | store.value_regex = (regex_t*)xmalloc(sizeof(regex_t)); | |
859 | if (regcomp(store.value_regex, value_regex, | |
860 | REG_EXTENDED)) { | |
861 | fprintf(stderr, "Invalid pattern: %s\n", | |
862 | value_regex); | |
863 | free(store.value_regex); | |
864 | ret = 6; | |
865 | goto out_free; | |
866 | } | |
867 | } | |
868 | ||
869 | store.offset[0] = 0; | |
870 | store.state = START; | |
871 | store.seen = 0; | |
872 | ||
873 | /* | |
874 | * After this, store.offset will contain the *end* offset | |
875 | * of the last match, or remain at 0 if no match was found. | |
876 | * As a side effect, we make sure to transform only a valid | |
877 | * existing config file. | |
878 | */ | |
879 | if (git_config_from_file(store_aux, config_filename)) { | |
880 | fprintf(stderr, "invalid config file\n"); | |
881 | free(store.key); | |
882 | if (store.value_regex != NULL) { | |
883 | regfree(store.value_regex); | |
884 | free(store.value_regex); | |
885 | } | |
886 | ret = 3; | |
887 | goto out_free; | |
888 | } | |
889 | ||
890 | free(store.key); | |
891 | if (store.value_regex != NULL) { | |
892 | regfree(store.value_regex); | |
893 | free(store.value_regex); | |
894 | } | |
895 | ||
896 | /* if nothing to unset, or too many matches, error out */ | |
897 | if ((store.seen == 0 && value == NULL) || | |
898 | (store.seen > 1 && multi_replace == 0)) { | |
899 | ret = 5; | |
900 | goto out_free; | |
901 | } | |
902 | ||
903 | fstat(in_fd, &st); | |
904 | contents_sz = xsize_t(st.st_size); | |
905 | contents = xmmap(NULL, contents_sz, PROT_READ, | |
906 | MAP_PRIVATE, in_fd, 0); | |
907 | close(in_fd); | |
908 | ||
909 | if (store.seen == 0) | |
910 | store.seen = 1; | |
911 | ||
912 | for (i = 0, copy_begin = 0; i < store.seen; i++) { | |
913 | if (store.offset[i] == 0) { | |
914 | store.offset[i] = copy_end = contents_sz; | |
915 | } else if (store.state != KEY_SEEN) { | |
916 | copy_end = store.offset[i]; | |
917 | } else | |
918 | copy_end = find_beginning_of_line( | |
919 | contents, contents_sz, | |
920 | store.offset[i]-2, &new_line); | |
921 | ||
922 | if (copy_end > 0 && contents[copy_end-1] != '\n') | |
923 | new_line = 1; | |
924 | ||
925 | /* write the first part of the config */ | |
926 | if (copy_end > copy_begin) { | |
927 | if (write_in_full(fd, contents + copy_begin, | |
928 | copy_end - copy_begin) < | |
929 | copy_end - copy_begin) | |
930 | goto write_err_out; | |
931 | if (new_line && | |
932 | write_in_full(fd, "\n", 1) != 1) | |
933 | goto write_err_out; | |
934 | } | |
935 | copy_begin = store.offset[i]; | |
936 | } | |
937 | ||
938 | /* write the pair (value == NULL means unset) */ | |
939 | if (value != NULL) { | |
940 | if (store.state == START) { | |
941 | if (!store_write_section(fd, key)) | |
942 | goto write_err_out; | |
943 | } | |
944 | if (!store_write_pair(fd, key, value)) | |
945 | goto write_err_out; | |
946 | } | |
947 | ||
948 | /* write the rest of the config */ | |
949 | if (copy_begin < contents_sz) | |
950 | if (write_in_full(fd, contents + copy_begin, | |
951 | contents_sz - copy_begin) < | |
952 | contents_sz - copy_begin) | |
953 | goto write_err_out; | |
954 | ||
955 | munmap(contents, contents_sz); | |
956 | } | |
957 | ||
958 | if (close(fd) || commit_lock_file(lock) < 0) { | |
959 | fprintf(stderr, "Cannot commit config file!\n"); | |
960 | ret = 4; | |
961 | goto out_free; | |
962 | } | |
963 | ||
964 | /* fd is closed, so don't try to close it below. */ | |
965 | fd = -1; | |
966 | /* | |
967 | * lock is committed, so don't try to roll it back below. | |
968 | * NOTE: Since lockfile.c keeps a linked list of all created | |
969 | * lock_file structures, it isn't safe to free(lock). It's | |
970 | * better to just leave it hanging around. | |
971 | */ | |
972 | lock = NULL; | |
973 | ret = 0; | |
974 | ||
975 | out_free: | |
976 | if (0 <= fd) | |
977 | close(fd); | |
978 | if (lock) | |
979 | rollback_lock_file(lock); | |
980 | free(config_filename); | |
981 | return ret; | |
982 | ||
983 | write_err_out: | |
984 | ret = write_error(); | |
985 | goto out_free; | |
986 | ||
987 | } | |
988 | ||
989 | static int section_name_match (const char *buf, const char *name) | |
990 | { | |
991 | int i = 0, j = 0, dot = 0; | |
992 | for (; buf[i] && buf[i] != ']'; i++) { | |
993 | if (!dot && isspace(buf[i])) { | |
994 | dot = 1; | |
995 | if (name[j++] != '.') | |
996 | break; | |
997 | for (i++; isspace(buf[i]); i++) | |
998 | ; /* do nothing */ | |
999 | if (buf[i] != '"') | |
1000 | break; | |
1001 | continue; | |
1002 | } | |
1003 | if (buf[i] == '\\' && dot) | |
1004 | i++; | |
1005 | else if (buf[i] == '"' && dot) { | |
1006 | for (i++; isspace(buf[i]); i++) | |
1007 | ; /* do_nothing */ | |
1008 | break; | |
1009 | } | |
1010 | if (buf[i] != name[j++]) | |
1011 | break; | |
1012 | } | |
1013 | return (buf[i] == ']' && name[j] == 0); | |
1014 | } | |
1015 | ||
1016 | /* if new_name == NULL, the section is removed instead */ | |
1017 | int git_config_rename_section(const char *old_name, const char *new_name) | |
1018 | { | |
1019 | int ret = 0, remove = 0; | |
1020 | char *config_filename; | |
1021 | struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1); | |
1022 | int out_fd; | |
1023 | char buf[1024]; | |
1024 | ||
1025 | config_filename = getenv(CONFIG_ENVIRONMENT); | |
1026 | if (!config_filename) { | |
1027 | config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT); | |
1028 | if (!config_filename) | |
1029 | config_filename = git_path("config"); | |
1030 | } | |
1031 | config_filename = xstrdup(config_filename); | |
1032 | out_fd = hold_lock_file_for_update(lock, config_filename, 0); | |
1033 | if (out_fd < 0) { | |
1034 | ret = error("Could not lock config file!"); | |
1035 | goto out; | |
1036 | } | |
1037 | ||
1038 | if (!(config_file = fopen(config_filename, "rb"))) { | |
1039 | /* no config file means nothing to rename, no error */ | |
1040 | goto unlock_and_out; | |
1041 | } | |
1042 | ||
1043 | while (fgets(buf, sizeof(buf), config_file)) { | |
1044 | int i; | |
1045 | int length; | |
1046 | for (i = 0; buf[i] && isspace(buf[i]); i++) | |
1047 | ; /* do nothing */ | |
1048 | if (buf[i] == '[') { | |
1049 | /* it's a section */ | |
1050 | if (section_name_match (&buf[i+1], old_name)) { | |
1051 | ret++; | |
1052 | if (new_name == NULL) { | |
1053 | remove = 1; | |
1054 | continue; | |
1055 | } | |
1056 | store.baselen = strlen(new_name); | |
1057 | if (!store_write_section(out_fd, new_name)) { | |
1058 | ret = write_error(); | |
1059 | goto out; | |
1060 | } | |
1061 | continue; | |
1062 | } | |
1063 | remove = 0; | |
1064 | } | |
1065 | if (remove) | |
1066 | continue; | |
1067 | length = strlen(buf); | |
1068 | if (write_in_full(out_fd, buf, length) != length) { | |
1069 | ret = write_error(); | |
1070 | goto out; | |
1071 | } | |
1072 | } | |
1073 | fclose(config_file); | |
1074 | unlock_and_out: | |
1075 | if (close(out_fd) || commit_lock_file(lock) < 0) | |
1076 | ret = error("Cannot commit config file!"); | |
1077 | out: | |
1078 | free(config_filename); | |
1079 | return ret; | |
1080 | } |