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Commit | Line | Data |
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10bea152 JS |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | * Copyright (C) Johannes Schindelin, 2005 | |
6 | * | |
7 | */ | |
17712991 | 8 | #include "cache.h" |
10bea152 | 9 | #include <regex.h> |
17712991 LT |
10 | |
11 | #define MAXNAME (256) | |
12 | ||
13 | static FILE *config_file; | |
0dccc7dc | 14 | static const char *config_file_name; |
17712991 LT |
15 | static int config_linenr; |
16 | static int get_next_char(void) | |
17 | { | |
18 | int c; | |
19 | FILE *f; | |
20 | ||
21 | c = '\n'; | |
22 | if ((f = config_file) != NULL) { | |
23 | c = fgetc(f); | |
db2c075d JH |
24 | if (c == '\r') { |
25 | /* DOS like systems */ | |
26 | c = fgetc(f); | |
27 | if (c != '\n') { | |
28 | ungetc(c, f); | |
29 | c = '\r'; | |
30 | } | |
31 | } | |
17712991 LT |
32 | if (c == '\n') |
33 | config_linenr++; | |
34 | if (c == EOF) { | |
35 | config_file = NULL; | |
36 | c = '\n'; | |
37 | } | |
38 | } | |
39 | return c; | |
40 | } | |
41 | ||
42 | static char *parse_value(void) | |
43 | { | |
44 | static char value[1024]; | |
45 | int quote = 0, comment = 0, len = 0, space = 0; | |
46 | ||
47 | for (;;) { | |
48 | int c = get_next_char(); | |
49 | if (len >= sizeof(value)) | |
50 | return NULL; | |
51 | if (c == '\n') { | |
52 | if (quote) | |
53 | return NULL; | |
54 | value[len] = 0; | |
55 | return value; | |
56 | } | |
57 | if (comment) | |
58 | continue; | |
59 | if (isspace(c) && !quote) { | |
60 | space = 1; | |
61 | continue; | |
62 | } | |
7ebdba61 JS |
63 | if (!quote) { |
64 | if (c == ';' || c == '#') { | |
65 | comment = 1; | |
66 | continue; | |
67 | } | |
68 | } | |
17712991 LT |
69 | if (space) { |
70 | if (len) | |
71 | value[len++] = ' '; | |
72 | space = 0; | |
73 | } | |
74 | if (c == '\\') { | |
75 | c = get_next_char(); | |
76 | switch (c) { | |
77 | case '\n': | |
78 | continue; | |
79 | case 't': | |
80 | c = '\t'; | |
81 | break; | |
82 | case 'b': | |
83 | c = '\b'; | |
84 | break; | |
85 | case 'n': | |
86 | c = '\n'; | |
87 | break; | |
5cbb401d LT |
88 | /* Some characters escape as themselves */ |
89 | case '\\': case '"': | |
90 | break; | |
91 | /* Reject unknown escape sequences */ | |
92 | default: | |
93 | return NULL; | |
17712991 LT |
94 | } |
95 | value[len++] = c; | |
96 | continue; | |
97 | } | |
98 | if (c == '"') { | |
99 | quote = 1-quote; | |
100 | continue; | |
101 | } | |
17712991 LT |
102 | value[len++] = c; |
103 | } | |
104 | } | |
105 | ||
38c5afa8 LT |
106 | static inline int iskeychar(int c) |
107 | { | |
108 | return isalnum(c) || c == '-'; | |
109 | } | |
110 | ||
17712991 LT |
111 | static int get_value(config_fn_t fn, char *name, unsigned int len) |
112 | { | |
113 | int c; | |
114 | char *value; | |
115 | ||
116 | /* Get the full name */ | |
117 | for (;;) { | |
118 | c = get_next_char(); | |
119 | if (c == EOF) | |
120 | break; | |
38c5afa8 | 121 | if (!iskeychar(c)) |
17712991 LT |
122 | break; |
123 | name[len++] = tolower(c); | |
124 | if (len >= MAXNAME) | |
125 | return -1; | |
126 | } | |
127 | name[len] = 0; | |
128 | while (c == ' ' || c == '\t') | |
129 | c = get_next_char(); | |
130 | ||
131 | value = NULL; | |
132 | if (c != '\n') { | |
133 | if (c != '=') | |
134 | return -1; | |
135 | value = parse_value(); | |
136 | if (!value) | |
137 | return -1; | |
138 | } | |
139 | return fn(name, value); | |
140 | } | |
141 | ||
d14f7764 LT |
142 | static int get_extended_base_var(char *name, int baselen, int c) |
143 | { | |
144 | do { | |
145 | if (c == '\n') | |
146 | return -1; | |
147 | c = get_next_char(); | |
148 | } while (isspace(c)); | |
149 | ||
150 | /* We require the format to be '[base "extension"]' */ | |
151 | if (c != '"') | |
152 | return -1; | |
153 | name[baselen++] = '.'; | |
154 | ||
155 | for (;;) { | |
156 | int c = get_next_char(); | |
157 | if (c == '\n') | |
158 | return -1; | |
159 | if (c == '"') | |
160 | break; | |
161 | if (c == '\\') { | |
162 | c = get_next_char(); | |
163 | if (c == '\n') | |
164 | return -1; | |
165 | } | |
166 | name[baselen++] = c; | |
167 | if (baselen > MAXNAME / 2) | |
168 | return -1; | |
169 | } | |
170 | ||
171 | /* Final ']' */ | |
172 | if (get_next_char() != ']') | |
173 | return -1; | |
174 | return baselen; | |
175 | } | |
176 | ||
17712991 LT |
177 | static int get_base_var(char *name) |
178 | { | |
179 | int baselen = 0; | |
180 | ||
181 | for (;;) { | |
182 | int c = get_next_char(); | |
183 | if (c == EOF) | |
184 | return -1; | |
185 | if (c == ']') | |
186 | return baselen; | |
d14f7764 LT |
187 | if (isspace(c)) |
188 | return get_extended_base_var(name, baselen, c); | |
38c5afa8 | 189 | if (!iskeychar(c) && c != '.') |
17712991 LT |
190 | return -1; |
191 | if (baselen > MAXNAME / 2) | |
192 | return -1; | |
193 | name[baselen++] = tolower(c); | |
194 | } | |
195 | } | |
196 | ||
197 | static int git_parse_file(config_fn_t fn) | |
198 | { | |
199 | int comment = 0; | |
200 | int baselen = 0; | |
201 | static char var[MAXNAME]; | |
202 | ||
203 | for (;;) { | |
204 | int c = get_next_char(); | |
205 | if (c == '\n') { | |
206 | /* EOF? */ | |
207 | if (!config_file) | |
208 | return 0; | |
209 | comment = 0; | |
210 | continue; | |
211 | } | |
212 | if (comment || isspace(c)) | |
213 | continue; | |
214 | if (c == '#' || c == ';') { | |
215 | comment = 1; | |
216 | continue; | |
217 | } | |
218 | if (c == '[') { | |
219 | baselen = get_base_var(var); | |
220 | if (baselen <= 0) | |
221 | break; | |
222 | var[baselen++] = '.'; | |
223 | var[baselen] = 0; | |
224 | continue; | |
225 | } | |
226 | if (!isalpha(c)) | |
227 | break; | |
128af9d1 | 228 | var[baselen] = tolower(c); |
17712991 LT |
229 | if (get_value(fn, var, baselen+1) < 0) |
230 | break; | |
231 | } | |
4f629539 | 232 | die("bad config file line %d in %s", config_linenr, config_file_name); |
17712991 LT |
233 | } |
234 | ||
235 | int git_config_int(const char *name, const char *value) | |
236 | { | |
237 | if (value && *value) { | |
238 | char *end; | |
239 | int val = strtol(value, &end, 0); | |
240 | if (!*end) | |
241 | return val; | |
242 | } | |
4f629539 | 243 | die("bad config value for '%s' in %s", name, config_file_name); |
17712991 LT |
244 | } |
245 | ||
246 | int git_config_bool(const char *name, const char *value) | |
247 | { | |
248 | if (!value) | |
249 | return 1; | |
250 | if (!*value) | |
251 | return 0; | |
624314fd | 252 | if (!strcasecmp(value, "true") || !strcasecmp(value, "yes")) |
17712991 | 253 | return 1; |
624314fd | 254 | if (!strcasecmp(value, "false") || !strcasecmp(value, "no")) |
17712991 LT |
255 | return 0; |
256 | return git_config_int(name, value) != 0; | |
257 | } | |
258 | ||
259 | int git_default_config(const char *var, const char *value) | |
260 | { | |
261 | /* This needs a better name */ | |
262 | if (!strcmp(var, "core.filemode")) { | |
263 | trust_executable_bit = git_config_bool(var, value); | |
264 | return 0; | |
265 | } | |
266 | ||
5f73076c JH |
267 | if (!strcmp(var, "core.ignorestat")) { |
268 | assume_unchanged = git_config_bool(var, value); | |
269 | return 0; | |
270 | } | |
271 | ||
e388c738 JH |
272 | if (!strcmp(var, "core.prefersymlinkrefs")) { |
273 | prefer_symlink_refs = git_config_bool(var, value); | |
f8348be3 JS |
274 | return 0; |
275 | } | |
276 | ||
6de08ae6 SP |
277 | if (!strcmp(var, "core.logallrefupdates")) { |
278 | log_all_ref_updates = git_config_bool(var, value); | |
279 | return 0; | |
280 | } | |
281 | ||
2f8acdb3 JH |
282 | if (!strcmp(var, "core.warnambiguousrefs")) { |
283 | warn_ambiguous_refs = git_config_bool(var, value); | |
284 | return 0; | |
285 | } | |
286 | ||
93821bd9 LT |
287 | if (!strcmp(var, "core.legacyheaders")) { |
288 | use_legacy_headers = git_config_bool(var, value); | |
289 | return 0; | |
290 | } | |
291 | ||
12f6c308 JBH |
292 | if (!strcmp(var, "core.compression")) { |
293 | int level = git_config_int(var, value); | |
294 | if (level == -1) | |
295 | level = Z_DEFAULT_COMPRESSION; | |
296 | else if (level < 0 || level > Z_BEST_COMPRESSION) | |
297 | die("bad zlib compression level %d", level); | |
298 | zlib_compression_level = level; | |
299 | return 0; | |
300 | } | |
301 | ||
e1b10391 | 302 | if (!strcmp(var, "user.name")) { |
817151e6 | 303 | strlcpy(git_default_name, value, sizeof(git_default_name)); |
e1b10391 LT |
304 | return 0; |
305 | } | |
306 | ||
307 | if (!strcmp(var, "user.email")) { | |
817151e6 | 308 | strlcpy(git_default_email, value, sizeof(git_default_email)); |
e1b10391 LT |
309 | return 0; |
310 | } | |
311 | ||
4e72dcec | 312 | if (!strcmp(var, "i18n.commitencoding")) { |
817151e6 | 313 | strlcpy(git_commit_encoding, value, sizeof(git_commit_encoding)); |
4e72dcec JH |
314 | return 0; |
315 | } | |
316 | ||
a159ca0c | 317 | if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) { |
aa086eb8 ML |
318 | pager_use_color = git_config_bool(var,value); |
319 | return 0; | |
320 | } | |
321 | ||
1ab661dd | 322 | /* Add other config variables here and to Documentation/config.txt. */ |
17712991 LT |
323 | return 0; |
324 | } | |
325 | ||
4f629539 | 326 | int git_config_from_file(config_fn_t fn, const char *filename) |
17712991 LT |
327 | { |
328 | int ret; | |
4f629539 | 329 | FILE *f = fopen(filename, "r"); |
17712991 LT |
330 | |
331 | ret = -1; | |
332 | if (f) { | |
333 | config_file = f; | |
4f629539 | 334 | config_file_name = filename; |
17712991 LT |
335 | config_linenr = 1; |
336 | ret = git_parse_file(fn); | |
337 | fclose(f); | |
4f629539 | 338 | config_file_name = NULL; |
17712991 LT |
339 | } |
340 | return ret; | |
341 | } | |
10bea152 | 342 | |
4f629539 JH |
343 | int git_config(config_fn_t fn) |
344 | { | |
5f1a63e0 JS |
345 | int ret = 0; |
346 | char *repo_config = NULL; | |
347 | const char *home = NULL, *filename; | |
348 | ||
349 | /* $GIT_CONFIG makes git read _only_ the given config file, | |
350 | * $GIT_CONFIG_LOCAL will make it process it in addition to the | |
351 | * global config file, the same way it would the per-repository | |
352 | * config file otherwise. */ | |
353 | filename = getenv("GIT_CONFIG"); | |
354 | if (!filename) { | |
355 | home = getenv("HOME"); | |
7f29f7a9 | 356 | filename = getenv("GIT_CONFIG_LOCAL"); |
5f1a63e0 | 357 | if (!filename) |
9befac47 | 358 | filename = repo_config = xstrdup(git_path("config")); |
7f29f7a9 | 359 | } |
5f1a63e0 JS |
360 | |
361 | if (home) { | |
9befac47 | 362 | char *user_config = xstrdup(mkpath("%s/.gitconfig", home)); |
e33d0611 | 363 | if (!access(user_config, R_OK)) |
5f1a63e0 JS |
364 | ret = git_config_from_file(fn, user_config); |
365 | free(user_config); | |
366 | } | |
367 | ||
368 | ret += git_config_from_file(fn, filename); | |
4cac42b1 | 369 | free(repo_config); |
5f1a63e0 | 370 | return ret; |
4f629539 JH |
371 | } |
372 | ||
10bea152 JS |
373 | /* |
374 | * Find all the stuff for git_config_set() below. | |
375 | */ | |
4ddba79d JS |
376 | |
377 | #define MAX_MATCHES 512 | |
378 | ||
10bea152 JS |
379 | static struct { |
380 | int baselen; | |
381 | char* key; | |
f98d863d | 382 | int do_not_match; |
10bea152 | 383 | regex_t* value_regex; |
4ddba79d JS |
384 | int multi_replace; |
385 | off_t offset[MAX_MATCHES]; | |
10bea152 JS |
386 | enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state; |
387 | int seen; | |
388 | } store; | |
389 | ||
f98d863d JS |
390 | static int matches(const char* key, const char* value) |
391 | { | |
392 | return !strcmp(key, store.key) && | |
393 | (store.value_regex == NULL || | |
394 | (store.do_not_match ^ | |
395 | !regexec(store.value_regex, value, 0, NULL, 0))); | |
396 | } | |
397 | ||
10bea152 JS |
398 | static int store_aux(const char* key, const char* value) |
399 | { | |
400 | switch (store.state) { | |
401 | case KEY_SEEN: | |
f98d863d | 402 | if (matches(key, value)) { |
4ddba79d | 403 | if (store.seen == 1 && store.multi_replace == 0) { |
10bea152 JS |
404 | fprintf(stderr, |
405 | "Warning: %s has multiple values\n", | |
406 | key); | |
4ddba79d JS |
407 | } else if (store.seen >= MAX_MATCHES) { |
408 | fprintf(stderr, "Too many matches\n"); | |
409 | return 1; | |
10bea152 | 410 | } |
4ddba79d JS |
411 | |
412 | store.offset[store.seen] = ftell(config_file); | |
10bea152 JS |
413 | store.seen++; |
414 | } | |
415 | break; | |
416 | case SECTION_SEEN: | |
417 | if (strncmp(key, store.key, store.baselen+1)) { | |
418 | store.state = SECTION_END_SEEN; | |
419 | break; | |
420 | } else | |
4ddba79d JS |
421 | /* do not increment matches: this is no match */ |
422 | store.offset[store.seen] = ftell(config_file); | |
10bea152 JS |
423 | /* fallthru */ |
424 | case SECTION_END_SEEN: | |
425 | case START: | |
f98d863d | 426 | if (matches(key, value)) { |
4ddba79d | 427 | store.offset[store.seen] = ftell(config_file); |
10bea152 JS |
428 | store.state = KEY_SEEN; |
429 | store.seen++; | |
d14f7764 LT |
430 | } else { |
431 | if (strrchr(key, '.') - key == store.baselen && | |
bdf0ef08 | 432 | !strncmp(key, store.key, store.baselen)) { |
93ddef3e | 433 | store.state = SECTION_SEEN; |
bdf0ef08 | 434 | store.offset[store.seen] = ftell(config_file); |
d14f7764 | 435 | } |
bdf0ef08 | 436 | } |
10bea152 JS |
437 | } |
438 | return 0; | |
439 | } | |
440 | ||
441 | static void store_write_section(int fd, const char* key) | |
442 | { | |
d14f7764 LT |
443 | const char *dot = strchr(key, '.'); |
444 | int len1 = store.baselen, len2 = -1; | |
445 | ||
446 | dot = strchr(key, '.'); | |
447 | if (dot) { | |
448 | int dotlen = dot - key; | |
449 | if (dotlen < len1) { | |
450 | len2 = len1 - dotlen - 1; | |
451 | len1 = dotlen; | |
452 | } | |
453 | } | |
454 | ||
10bea152 | 455 | write(fd, "[", 1); |
d14f7764 LT |
456 | write(fd, key, len1); |
457 | if (len2 >= 0) { | |
458 | write(fd, " \"", 2); | |
459 | while (--len2 >= 0) { | |
460 | unsigned char c = *++dot; | |
461 | if (c == '"') | |
462 | write(fd, "\\", 1); | |
463 | write(fd, &c, 1); | |
464 | } | |
465 | write(fd, "\"", 1); | |
466 | } | |
10bea152 JS |
467 | write(fd, "]\n", 2); |
468 | } | |
469 | ||
470 | static void store_write_pair(int fd, const char* key, const char* value) | |
471 | { | |
472 | int i; | |
473 | ||
474 | write(fd, "\t", 1); | |
475 | write(fd, key+store.baselen+1, | |
476 | strlen(key+store.baselen+1)); | |
477 | write(fd, " = ", 3); | |
478 | for (i = 0; value[i]; i++) | |
479 | switch (value[i]) { | |
480 | case '\n': write(fd, "\\n", 2); break; | |
481 | case '\t': write(fd, "\\t", 2); break; | |
482 | case '"': case '\\': write(fd, "\\", 1); | |
483 | default: write(fd, value+i, 1); | |
484 | } | |
485 | write(fd, "\n", 1); | |
486 | } | |
487 | ||
4ddba79d JS |
488 | static int find_beginning_of_line(const char* contents, int size, |
489 | int offset_, int* found_bracket) | |
490 | { | |
491 | int equal_offset = size, bracket_offset = size; | |
492 | int offset; | |
493 | ||
494 | for (offset = offset_-2; offset > 0 | |
495 | && contents[offset] != '\n'; offset--) | |
496 | switch (contents[offset]) { | |
497 | case '=': equal_offset = offset; break; | |
498 | case ']': bracket_offset = offset; break; | |
499 | } | |
500 | if (bracket_offset < equal_offset) { | |
501 | *found_bracket = 1; | |
502 | offset = bracket_offset+1; | |
503 | } else | |
504 | offset++; | |
505 | ||
506 | return offset; | |
507 | } | |
508 | ||
10bea152 JS |
509 | int git_config_set(const char* key, const char* value) |
510 | { | |
4ddba79d | 511 | return git_config_set_multivar(key, value, NULL, 0); |
10bea152 JS |
512 | } |
513 | ||
514 | /* | |
515 | * If value==NULL, unset in (remove from) config, | |
516 | * if value_regex!=NULL, disregard key/value pairs where value does not match. | |
4ddba79d JS |
517 | * if multi_replace==0, nothing, or only one matching key/value is replaced, |
518 | * else all matching key/values (regardless how many) are removed, | |
519 | * before the new pair is written. | |
10bea152 JS |
520 | * |
521 | * Returns 0 on success. | |
522 | * | |
523 | * This function does this: | |
524 | * | |
525 | * - it locks the config file by creating ".git/config.lock" | |
526 | * | |
527 | * - it then parses the config using store_aux() as validator to find | |
528 | * the position on the key/value pair to replace. If it is to be unset, | |
529 | * it must be found exactly once. | |
530 | * | |
531 | * - the config file is mmap()ed and the part before the match (if any) is | |
532 | * written to the lock file, then the changed part and the rest. | |
533 | * | |
534 | * - the config file is removed and the lock file rename()d to it. | |
535 | * | |
536 | */ | |
537 | int git_config_set_multivar(const char* key, const char* value, | |
4ddba79d | 538 | const char* value_regex, int multi_replace) |
10bea152 | 539 | { |
d14f7764 | 540 | int i, dot; |
f8ba655e | 541 | int fd = -1, in_fd; |
dafc88b1 | 542 | int ret; |
9c3796fc JS |
543 | char* config_filename; |
544 | char* lock_file; | |
b17e659d | 545 | const char* last_dot = strrchr(key, '.'); |
4ddba79d | 546 | |
9c3796fc JS |
547 | config_filename = getenv("GIT_CONFIG"); |
548 | if (!config_filename) { | |
549 | config_filename = getenv("GIT_CONFIG_LOCAL"); | |
550 | if (!config_filename) | |
551 | config_filename = git_path("config"); | |
552 | } | |
9befac47 SP |
553 | config_filename = xstrdup(config_filename); |
554 | lock_file = xstrdup(mkpath("%s.lock", config_filename)); | |
9c3796fc | 555 | |
10bea152 JS |
556 | /* |
557 | * Since "key" actually contains the section name and the real | |
558 | * key name separated by a dot, we have to know where the dot is. | |
559 | */ | |
b17e659d | 560 | |
dafc88b1 | 561 | if (last_dot == NULL) { |
10bea152 | 562 | fprintf(stderr, "key does not contain a section: %s\n", key); |
dafc88b1 SH |
563 | ret = 2; |
564 | goto out_free; | |
10bea152 | 565 | } |
b17e659d JS |
566 | store.baselen = last_dot - key; |
567 | ||
568 | store.multi_replace = multi_replace; | |
10bea152 JS |
569 | |
570 | /* | |
571 | * Validate the key and while at it, lower case it for matching. | |
572 | */ | |
2d7320d0 | 573 | store.key = xmalloc(strlen(key) + 1); |
d14f7764 LT |
574 | dot = 0; |
575 | for (i = 0; key[i]; i++) { | |
576 | unsigned char c = key[i]; | |
577 | if (c == '.') | |
578 | dot = 1; | |
579 | /* Leave the extended basename untouched.. */ | |
580 | if (!dot || i > store.baselen) { | |
38c5afa8 | 581 | if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) { |
d14f7764 LT |
582 | fprintf(stderr, "invalid key: %s\n", key); |
583 | free(store.key); | |
584 | ret = 1; | |
585 | goto out_free; | |
586 | } | |
587 | c = tolower(c); | |
588 | } | |
589 | store.key[i] = c; | |
590 | } | |
3dd94e3b | 591 | store.key[i] = 0; |
10bea152 JS |
592 | |
593 | /* | |
594 | * The lock_file serves a purpose in addition to locking: the new | |
595 | * contents of .git/config will be written into it. | |
596 | */ | |
597 | fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
138086a7 | 598 | if (fd < 0 || adjust_shared_perm(lock_file)) { |
10bea152 JS |
599 | fprintf(stderr, "could not lock config file\n"); |
600 | free(store.key); | |
dafc88b1 SH |
601 | ret = -1; |
602 | goto out_free; | |
10bea152 JS |
603 | } |
604 | ||
605 | /* | |
606 | * If .git/config does not exist yet, write a minimal version. | |
607 | */ | |
88fb958b AR |
608 | in_fd = open(config_filename, O_RDONLY); |
609 | if ( in_fd < 0 ) { | |
10bea152 JS |
610 | free(store.key); |
611 | ||
88fb958b AR |
612 | if ( ENOENT != errno ) { |
613 | error("opening %s: %s", config_filename, | |
614 | strerror(errno)); | |
dafc88b1 SH |
615 | ret = 3; /* same as "invalid config file" */ |
616 | goto out_free; | |
88fb958b | 617 | } |
10bea152 JS |
618 | /* if nothing to unset, error out */ |
619 | if (value == NULL) { | |
dafc88b1 SH |
620 | ret = 5; |
621 | goto out_free; | |
10bea152 JS |
622 | } |
623 | ||
624 | store.key = (char*)key; | |
10bea152 JS |
625 | store_write_section(fd, key); |
626 | store_write_pair(fd, key, value); | |
627 | } else{ | |
88fb958b | 628 | struct stat st; |
10bea152 | 629 | char* contents; |
4ddba79d | 630 | int i, copy_begin, copy_end, new_line = 0; |
10bea152 JS |
631 | |
632 | if (value_regex == NULL) | |
633 | store.value_regex = NULL; | |
634 | else { | |
f98d863d JS |
635 | if (value_regex[0] == '!') { |
636 | store.do_not_match = 1; | |
637 | value_regex++; | |
638 | } else | |
639 | store.do_not_match = 0; | |
640 | ||
2d7320d0 | 641 | store.value_regex = (regex_t*)xmalloc(sizeof(regex_t)); |
10bea152 JS |
642 | if (regcomp(store.value_regex, value_regex, |
643 | REG_EXTENDED)) { | |
7246ed43 | 644 | fprintf(stderr, "Invalid pattern: %s\n", |
10bea152 JS |
645 | value_regex); |
646 | free(store.value_regex); | |
dafc88b1 SH |
647 | ret = 6; |
648 | goto out_free; | |
10bea152 JS |
649 | } |
650 | } | |
651 | ||
4ddba79d | 652 | store.offset[0] = 0; |
10bea152 JS |
653 | store.state = START; |
654 | store.seen = 0; | |
655 | ||
656 | /* | |
657 | * After this, store.offset will contain the *end* offset | |
658 | * of the last match, or remain at 0 if no match was found. | |
659 | * As a side effect, we make sure to transform only a valid | |
660 | * existing config file. | |
661 | */ | |
9c3796fc | 662 | if (git_config_from_file(store_aux, config_filename)) { |
10bea152 JS |
663 | fprintf(stderr, "invalid config file\n"); |
664 | free(store.key); | |
665 | if (store.value_regex != NULL) { | |
666 | regfree(store.value_regex); | |
667 | free(store.value_regex); | |
668 | } | |
dafc88b1 SH |
669 | ret = 3; |
670 | goto out_free; | |
10bea152 JS |
671 | } |
672 | ||
673 | free(store.key); | |
674 | if (store.value_regex != NULL) { | |
675 | regfree(store.value_regex); | |
676 | free(store.value_regex); | |
677 | } | |
678 | ||
4ddba79d JS |
679 | /* if nothing to unset, or too many matches, error out */ |
680 | if ((store.seen == 0 && value == NULL) || | |
681 | (store.seen > 1 && multi_replace == 0)) { | |
dafc88b1 SH |
682 | ret = 5; |
683 | goto out_free; | |
10bea152 JS |
684 | } |
685 | ||
88fb958b | 686 | fstat(in_fd, &st); |
10bea152 JS |
687 | contents = mmap(NULL, st.st_size, PROT_READ, |
688 | MAP_PRIVATE, in_fd, 0); | |
689 | close(in_fd); | |
690 | ||
4ddba79d JS |
691 | if (store.seen == 0) |
692 | store.seen = 1; | |
693 | ||
694 | for (i = 0, copy_begin = 0; i < store.seen; i++) { | |
695 | if (store.offset[i] == 0) { | |
696 | store.offset[i] = copy_end = st.st_size; | |
697 | } else if (store.state != KEY_SEEN) { | |
698 | copy_end = store.offset[i]; | |
10bea152 | 699 | } else |
4ddba79d JS |
700 | copy_end = find_beginning_of_line( |
701 | contents, st.st_size, | |
702 | store.offset[i]-2, &new_line); | |
703 | ||
704 | /* write the first part of the config */ | |
705 | if (copy_end > copy_begin) { | |
706 | write(fd, contents + copy_begin, | |
707 | copy_end - copy_begin); | |
708 | if (new_line) | |
709 | write(fd, "\n", 1); | |
710 | } | |
711 | copy_begin = store.offset[i]; | |
10bea152 JS |
712 | } |
713 | ||
10bea152 JS |
714 | /* write the pair (value == NULL means unset) */ |
715 | if (value != NULL) { | |
716 | if (store.state == START) | |
717 | store_write_section(fd, key); | |
718 | store_write_pair(fd, key, value); | |
719 | } | |
720 | ||
721 | /* write the rest of the config */ | |
4ddba79d JS |
722 | if (copy_begin < st.st_size) |
723 | write(fd, contents + copy_begin, | |
724 | st.st_size - copy_begin); | |
10bea152 JS |
725 | |
726 | munmap(contents, st.st_size); | |
3a2f2bb3 | 727 | unlink(config_filename); |
10bea152 JS |
728 | } |
729 | ||
3a2f2bb3 | 730 | if (rename(lock_file, config_filename) < 0) { |
10bea152 | 731 | fprintf(stderr, "Could not rename the lock file?\n"); |
dafc88b1 SH |
732 | ret = 4; |
733 | goto out_free; | |
10bea152 JS |
734 | } |
735 | ||
dafc88b1 SH |
736 | ret = 0; |
737 | ||
738 | out_free: | |
f8ba655e JH |
739 | if (0 <= fd) |
740 | close(fd); | |
4cac42b1 | 741 | free(config_filename); |
f8ba655e JH |
742 | if (lock_file) { |
743 | unlink(lock_file); | |
dafc88b1 | 744 | free(lock_file); |
f8ba655e | 745 | } |
dafc88b1 | 746 | return ret; |
10bea152 JS |
747 | } |
748 | ||
4ddba79d | 749 |