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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 LT |
8 | #include "cache.h" |
9 | ||
10 | #define MAXNAME (256) | |
11 | ||
12 | static FILE *config_file; | |
0dccc7dc | 13 | static const char *config_file_name; |
17712991 LT |
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); | |
db2c075d JH |
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 | } | |
17712991 LT |
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 | } | |
7ebdba61 JS |
62 | if (!quote) { |
63 | if (c == ';' || c == '#') { | |
64 | comment = 1; | |
65 | continue; | |
66 | } | |
67 | } | |
17712991 LT |
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; | |
5cbb401d LT |
87 | /* Some characters escape as themselves */ |
88 | case '\\': case '"': | |
89 | break; | |
90 | /* Reject unknown escape sequences */ | |
91 | default: | |
92 | return NULL; | |
17712991 LT |
93 | } |
94 | value[len++] = c; | |
95 | continue; | |
96 | } | |
97 | if (c == '"') { | |
98 | quote = 1-quote; | |
99 | continue; | |
100 | } | |
17712991 LT |
101 | value[len++] = c; |
102 | } | |
103 | } | |
104 | ||
38c5afa8 LT |
105 | static inline int iskeychar(int c) |
106 | { | |
107 | return isalnum(c) || c == '-'; | |
108 | } | |
109 | ||
17712991 LT |
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; | |
38c5afa8 | 120 | if (!iskeychar(c)) |
17712991 LT |
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 | ||
d14f7764 LT |
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 | ||
17712991 LT |
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; | |
d14f7764 LT |
186 | if (isspace(c)) |
187 | return get_extended_base_var(name, baselen, c); | |
38c5afa8 | 188 | if (!iskeychar(c) && c != '.') |
17712991 LT |
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; | |
128af9d1 | 227 | var[baselen] = tolower(c); |
17712991 LT |
228 | if (get_value(fn, var, baselen+1) < 0) |
229 | break; | |
230 | } | |
4f629539 | 231 | die("bad config file line %d in %s", config_linenr, config_file_name); |
17712991 LT |
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; | |
d77a64d3 SP |
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; | |
17712991 | 247 | } |
4f629539 | 248 | die("bad config value for '%s' in %s", name, config_file_name); |
17712991 LT |
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; | |
624314fd | 257 | if (!strcasecmp(value, "true") || !strcasecmp(value, "yes")) |
17712991 | 258 | return 1; |
624314fd | 259 | if (!strcasecmp(value, "false") || !strcasecmp(value, "no")) |
17712991 LT |
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 | ||
5f73076c JH |
272 | if (!strcmp(var, "core.ignorestat")) { |
273 | assume_unchanged = git_config_bool(var, value); | |
274 | return 0; | |
275 | } | |
276 | ||
e388c738 JH |
277 | if (!strcmp(var, "core.prefersymlinkrefs")) { |
278 | prefer_symlink_refs = git_config_bool(var, value); | |
f8348be3 JS |
279 | return 0; |
280 | } | |
281 | ||
6de08ae6 SP |
282 | if (!strcmp(var, "core.logallrefupdates")) { |
283 | log_all_ref_updates = git_config_bool(var, value); | |
284 | return 0; | |
285 | } | |
286 | ||
2f8acdb3 JH |
287 | if (!strcmp(var, "core.warnambiguousrefs")) { |
288 | warn_ambiguous_refs = git_config_bool(var, value); | |
289 | return 0; | |
290 | } | |
291 | ||
93821bd9 LT |
292 | if (!strcmp(var, "core.legacyheaders")) { |
293 | use_legacy_headers = git_config_bool(var, value); | |
294 | return 0; | |
295 | } | |
296 | ||
12f6c308 JBH |
297 | if (!strcmp(var, "core.compression")) { |
298 | int level = git_config_int(var, value); | |
299 | if (level == -1) | |
300 | level = Z_DEFAULT_COMPRESSION; | |
301 | else if (level < 0 || level > Z_BEST_COMPRESSION) | |
302 | die("bad zlib compression level %d", level); | |
303 | zlib_compression_level = level; | |
304 | return 0; | |
305 | } | |
306 | ||
60bb8b14 SP |
307 | if (!strcmp(var, "core.packedgitwindowsize")) { |
308 | int pgsz = getpagesize(); | |
309 | packed_git_window_size = git_config_int(var, value); | |
310 | packed_git_window_size /= pgsz; | |
40be8272 SP |
311 | if (packed_git_window_size < 2) |
312 | packed_git_window_size = 2; | |
60bb8b14 SP |
313 | packed_git_window_size *= pgsz; |
314 | return 0; | |
315 | } | |
316 | ||
77ccc5bb SP |
317 | if (!strcmp(var, "core.packedgitlimit")) { |
318 | packed_git_limit = git_config_int(var, value); | |
319 | return 0; | |
320 | } | |
321 | ||
e1b10391 | 322 | if (!strcmp(var, "user.name")) { |
817151e6 | 323 | strlcpy(git_default_name, value, sizeof(git_default_name)); |
e1b10391 LT |
324 | return 0; |
325 | } | |
326 | ||
327 | if (!strcmp(var, "user.email")) { | |
817151e6 | 328 | strlcpy(git_default_email, value, sizeof(git_default_email)); |
e1b10391 LT |
329 | return 0; |
330 | } | |
331 | ||
4e72dcec | 332 | if (!strcmp(var, "i18n.commitencoding")) { |
d2c11a38 | 333 | git_commit_encoding = strdup(value); |
4e72dcec JH |
334 | return 0; |
335 | } | |
336 | ||
d2c11a38 JH |
337 | if (!strcmp(var, "i18n.logoutputencoding")) { |
338 | git_log_output_encoding = strdup(value); | |
339 | return 0; | |
340 | } | |
341 | ||
342 | ||
a159ca0c | 343 | if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) { |
aa086eb8 ML |
344 | pager_use_color = git_config_bool(var,value); |
345 | return 0; | |
346 | } | |
347 | ||
1ab661dd | 348 | /* Add other config variables here and to Documentation/config.txt. */ |
17712991 LT |
349 | return 0; |
350 | } | |
351 | ||
4f629539 | 352 | int git_config_from_file(config_fn_t fn, const char *filename) |
17712991 LT |
353 | { |
354 | int ret; | |
4f629539 | 355 | FILE *f = fopen(filename, "r"); |
17712991 LT |
356 | |
357 | ret = -1; | |
358 | if (f) { | |
359 | config_file = f; | |
4f629539 | 360 | config_file_name = filename; |
17712991 LT |
361 | config_linenr = 1; |
362 | ret = git_parse_file(fn); | |
363 | fclose(f); | |
4f629539 | 364 | config_file_name = NULL; |
17712991 LT |
365 | } |
366 | return ret; | |
367 | } | |
10bea152 | 368 | |
4f629539 JH |
369 | int git_config(config_fn_t fn) |
370 | { | |
5f1a63e0 JS |
371 | int ret = 0; |
372 | char *repo_config = NULL; | |
373 | const char *home = NULL, *filename; | |
374 | ||
375 | /* $GIT_CONFIG makes git read _only_ the given config file, | |
376 | * $GIT_CONFIG_LOCAL will make it process it in addition to the | |
377 | * global config file, the same way it would the per-repository | |
378 | * config file otherwise. */ | |
d4ebc36c | 379 | filename = getenv(CONFIG_ENVIRONMENT); |
5f1a63e0 JS |
380 | if (!filename) { |
381 | home = getenv("HOME"); | |
d4ebc36c | 382 | filename = getenv(CONFIG_LOCAL_ENVIRONMENT); |
5f1a63e0 | 383 | if (!filename) |
9befac47 | 384 | filename = repo_config = xstrdup(git_path("config")); |
7f29f7a9 | 385 | } |
5f1a63e0 JS |
386 | |
387 | if (home) { | |
9befac47 | 388 | char *user_config = xstrdup(mkpath("%s/.gitconfig", home)); |
e33d0611 | 389 | if (!access(user_config, R_OK)) |
5f1a63e0 JS |
390 | ret = git_config_from_file(fn, user_config); |
391 | free(user_config); | |
392 | } | |
393 | ||
394 | ret += git_config_from_file(fn, filename); | |
4cac42b1 | 395 | free(repo_config); |
5f1a63e0 | 396 | return ret; |
4f629539 JH |
397 | } |
398 | ||
10bea152 JS |
399 | /* |
400 | * Find all the stuff for git_config_set() below. | |
401 | */ | |
4ddba79d JS |
402 | |
403 | #define MAX_MATCHES 512 | |
404 | ||
10bea152 JS |
405 | static struct { |
406 | int baselen; | |
407 | char* key; | |
f98d863d | 408 | int do_not_match; |
10bea152 | 409 | regex_t* value_regex; |
4ddba79d JS |
410 | int multi_replace; |
411 | off_t offset[MAX_MATCHES]; | |
10bea152 JS |
412 | enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state; |
413 | int seen; | |
414 | } store; | |
415 | ||
f98d863d JS |
416 | static int matches(const char* key, const char* value) |
417 | { | |
418 | return !strcmp(key, store.key) && | |
419 | (store.value_regex == NULL || | |
420 | (store.do_not_match ^ | |
421 | !regexec(store.value_regex, value, 0, NULL, 0))); | |
422 | } | |
423 | ||
10bea152 JS |
424 | static int store_aux(const char* key, const char* value) |
425 | { | |
426 | switch (store.state) { | |
427 | case KEY_SEEN: | |
f98d863d | 428 | if (matches(key, value)) { |
4ddba79d | 429 | if (store.seen == 1 && store.multi_replace == 0) { |
10bea152 JS |
430 | fprintf(stderr, |
431 | "Warning: %s has multiple values\n", | |
432 | key); | |
4ddba79d JS |
433 | } else if (store.seen >= MAX_MATCHES) { |
434 | fprintf(stderr, "Too many matches\n"); | |
435 | return 1; | |
10bea152 | 436 | } |
4ddba79d JS |
437 | |
438 | store.offset[store.seen] = ftell(config_file); | |
10bea152 JS |
439 | store.seen++; |
440 | } | |
441 | break; | |
442 | case SECTION_SEEN: | |
443 | if (strncmp(key, store.key, store.baselen+1)) { | |
444 | store.state = SECTION_END_SEEN; | |
445 | break; | |
446 | } else | |
4ddba79d JS |
447 | /* do not increment matches: this is no match */ |
448 | store.offset[store.seen] = ftell(config_file); | |
10bea152 JS |
449 | /* fallthru */ |
450 | case SECTION_END_SEEN: | |
451 | case START: | |
f98d863d | 452 | if (matches(key, value)) { |
4ddba79d | 453 | store.offset[store.seen] = ftell(config_file); |
10bea152 JS |
454 | store.state = KEY_SEEN; |
455 | store.seen++; | |
d14f7764 LT |
456 | } else { |
457 | if (strrchr(key, '.') - key == store.baselen && | |
bdf0ef08 | 458 | !strncmp(key, store.key, store.baselen)) { |
93ddef3e | 459 | store.state = SECTION_SEEN; |
bdf0ef08 | 460 | store.offset[store.seen] = ftell(config_file); |
d14f7764 | 461 | } |
bdf0ef08 | 462 | } |
10bea152 JS |
463 | } |
464 | return 0; | |
465 | } | |
466 | ||
480c9e52 AW |
467 | static int write_error() |
468 | { | |
469 | fprintf(stderr, "Failed to write new configuration file\n"); | |
470 | ||
471 | /* Same error code as "failed to rename". */ | |
472 | return 4; | |
473 | } | |
474 | ||
475 | static int store_write_section(int fd, const char* key) | |
10bea152 | 476 | { |
d14f7764 LT |
477 | const char *dot = strchr(key, '.'); |
478 | int len1 = store.baselen, len2 = -1; | |
479 | ||
480 | dot = strchr(key, '.'); | |
481 | if (dot) { | |
482 | int dotlen = dot - key; | |
483 | if (dotlen < len1) { | |
484 | len2 = len1 - dotlen - 1; | |
485 | len1 = dotlen; | |
486 | } | |
487 | } | |
488 | ||
480c9e52 AW |
489 | if (write_in_full(fd, "[", 1) != 1 || |
490 | write_in_full(fd, key, len1) != len1) | |
491 | return 0; | |
d14f7764 | 492 | if (len2 >= 0) { |
480c9e52 AW |
493 | if (write_in_full(fd, " \"", 2) != 2) |
494 | return 0; | |
d14f7764 LT |
495 | while (--len2 >= 0) { |
496 | unsigned char c = *++dot; | |
497 | if (c == '"') | |
480c9e52 AW |
498 | if (write_in_full(fd, "\\", 1) != 1) |
499 | return 0; | |
500 | if (write_in_full(fd, &c, 1) != 1) | |
501 | return 0; | |
d14f7764 | 502 | } |
480c9e52 AW |
503 | if (write_in_full(fd, "\"", 1) != 1) |
504 | return 0; | |
d14f7764 | 505 | } |
480c9e52 AW |
506 | if (write_in_full(fd, "]\n", 2) != 2) |
507 | return 0; | |
508 | ||
509 | return 1; | |
10bea152 JS |
510 | } |
511 | ||
480c9e52 | 512 | static int store_write_pair(int fd, const char* key, const char* value) |
10bea152 JS |
513 | { |
514 | int i; | |
480c9e52 | 515 | int length = strlen(key+store.baselen+1); |
cdd4fb15 BG |
516 | int quote = 0; |
517 | ||
518 | /* Check to see if the value needs to be quoted. */ | |
519 | if (value[0] == ' ') | |
520 | quote = 1; | |
521 | for (i = 0; value[i]; i++) | |
522 | if (value[i] == ';' || value[i] == '#') | |
523 | quote = 1; | |
524 | if (value[i-1] == ' ') | |
525 | quote = 1; | |
10bea152 | 526 | |
480c9e52 AW |
527 | if (write_in_full(fd, "\t", 1) != 1 || |
528 | write_in_full(fd, key+store.baselen+1, length) != length || | |
529 | write_in_full(fd, " = ", 3) != 3) | |
530 | return 0; | |
cdd4fb15 BG |
531 | if (quote && write_in_full(fd, "\"", 1) != 1) |
532 | return 0; | |
10bea152 JS |
533 | for (i = 0; value[i]; i++) |
534 | switch (value[i]) { | |
480c9e52 AW |
535 | case '\n': |
536 | if (write_in_full(fd, "\\n", 2) != 2) | |
537 | return 0; | |
538 | break; | |
539 | case '\t': | |
540 | if (write_in_full(fd, "\\t", 2) != 2) | |
541 | return 0; | |
542 | break; | |
543 | case '"': | |
544 | case '\\': | |
545 | if (write_in_full(fd, "\\", 1) != 1) | |
546 | return 0; | |
547 | default: | |
548 | if (write_in_full(fd, value+i, 1) != 1) | |
549 | return 0; | |
550 | break; | |
551 | } | |
cdd4fb15 BG |
552 | if (quote && write_in_full(fd, "\"", 1) != 1) |
553 | return 0; | |
480c9e52 AW |
554 | if (write_in_full(fd, "\n", 1) != 1) |
555 | return 0; | |
556 | return 1; | |
10bea152 JS |
557 | } |
558 | ||
4ddba79d JS |
559 | static int find_beginning_of_line(const char* contents, int size, |
560 | int offset_, int* found_bracket) | |
561 | { | |
562 | int equal_offset = size, bracket_offset = size; | |
563 | int offset; | |
564 | ||
565 | for (offset = offset_-2; offset > 0 | |
566 | && contents[offset] != '\n'; offset--) | |
567 | switch (contents[offset]) { | |
568 | case '=': equal_offset = offset; break; | |
569 | case ']': bracket_offset = offset; break; | |
570 | } | |
571 | if (bracket_offset < equal_offset) { | |
572 | *found_bracket = 1; | |
573 | offset = bracket_offset+1; | |
574 | } else | |
575 | offset++; | |
576 | ||
577 | return offset; | |
578 | } | |
579 | ||
10bea152 JS |
580 | int git_config_set(const char* key, const char* value) |
581 | { | |
4ddba79d | 582 | return git_config_set_multivar(key, value, NULL, 0); |
10bea152 JS |
583 | } |
584 | ||
585 | /* | |
586 | * If value==NULL, unset in (remove from) config, | |
587 | * if value_regex!=NULL, disregard key/value pairs where value does not match. | |
4ddba79d JS |
588 | * if multi_replace==0, nothing, or only one matching key/value is replaced, |
589 | * else all matching key/values (regardless how many) are removed, | |
590 | * before the new pair is written. | |
10bea152 JS |
591 | * |
592 | * Returns 0 on success. | |
593 | * | |
594 | * This function does this: | |
595 | * | |
596 | * - it locks the config file by creating ".git/config.lock" | |
597 | * | |
598 | * - it then parses the config using store_aux() as validator to find | |
599 | * the position on the key/value pair to replace. If it is to be unset, | |
600 | * it must be found exactly once. | |
601 | * | |
602 | * - the config file is mmap()ed and the part before the match (if any) is | |
603 | * written to the lock file, then the changed part and the rest. | |
604 | * | |
605 | * - the config file is removed and the lock file rename()d to it. | |
606 | * | |
607 | */ | |
608 | int git_config_set_multivar(const char* key, const char* value, | |
4ddba79d | 609 | const char* value_regex, int multi_replace) |
10bea152 | 610 | { |
d14f7764 | 611 | int i, dot; |
f8ba655e | 612 | int fd = -1, in_fd; |
dafc88b1 | 613 | int ret; |
9c3796fc JS |
614 | char* config_filename; |
615 | char* lock_file; | |
b17e659d | 616 | const char* last_dot = strrchr(key, '.'); |
4ddba79d | 617 | |
d4ebc36c | 618 | config_filename = getenv(CONFIG_ENVIRONMENT); |
9c3796fc | 619 | if (!config_filename) { |
d4ebc36c | 620 | config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT); |
9c3796fc JS |
621 | if (!config_filename) |
622 | config_filename = git_path("config"); | |
623 | } | |
9befac47 SP |
624 | config_filename = xstrdup(config_filename); |
625 | lock_file = xstrdup(mkpath("%s.lock", config_filename)); | |
9c3796fc | 626 | |
10bea152 JS |
627 | /* |
628 | * Since "key" actually contains the section name and the real | |
629 | * key name separated by a dot, we have to know where the dot is. | |
630 | */ | |
b17e659d | 631 | |
dafc88b1 | 632 | if (last_dot == NULL) { |
10bea152 | 633 | fprintf(stderr, "key does not contain a section: %s\n", key); |
dafc88b1 SH |
634 | ret = 2; |
635 | goto out_free; | |
10bea152 | 636 | } |
b17e659d JS |
637 | store.baselen = last_dot - key; |
638 | ||
639 | store.multi_replace = multi_replace; | |
10bea152 JS |
640 | |
641 | /* | |
642 | * Validate the key and while at it, lower case it for matching. | |
643 | */ | |
2d7320d0 | 644 | store.key = xmalloc(strlen(key) + 1); |
d14f7764 LT |
645 | dot = 0; |
646 | for (i = 0; key[i]; i++) { | |
647 | unsigned char c = key[i]; | |
648 | if (c == '.') | |
649 | dot = 1; | |
650 | /* Leave the extended basename untouched.. */ | |
651 | if (!dot || i > store.baselen) { | |
38c5afa8 | 652 | if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) { |
d14f7764 LT |
653 | fprintf(stderr, "invalid key: %s\n", key); |
654 | free(store.key); | |
655 | ret = 1; | |
656 | goto out_free; | |
657 | } | |
658 | c = tolower(c); | |
659 | } | |
660 | store.key[i] = c; | |
661 | } | |
3dd94e3b | 662 | store.key[i] = 0; |
10bea152 JS |
663 | |
664 | /* | |
665 | * The lock_file serves a purpose in addition to locking: the new | |
666 | * contents of .git/config will be written into it. | |
667 | */ | |
668 | fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
138086a7 | 669 | if (fd < 0 || adjust_shared_perm(lock_file)) { |
10bea152 JS |
670 | fprintf(stderr, "could not lock config file\n"); |
671 | free(store.key); | |
dafc88b1 SH |
672 | ret = -1; |
673 | goto out_free; | |
10bea152 JS |
674 | } |
675 | ||
676 | /* | |
677 | * If .git/config does not exist yet, write a minimal version. | |
678 | */ | |
88fb958b AR |
679 | in_fd = open(config_filename, O_RDONLY); |
680 | if ( in_fd < 0 ) { | |
10bea152 JS |
681 | free(store.key); |
682 | ||
88fb958b AR |
683 | if ( ENOENT != errno ) { |
684 | error("opening %s: %s", config_filename, | |
685 | strerror(errno)); | |
dafc88b1 SH |
686 | ret = 3; /* same as "invalid config file" */ |
687 | goto out_free; | |
88fb958b | 688 | } |
10bea152 JS |
689 | /* if nothing to unset, error out */ |
690 | if (value == NULL) { | |
dafc88b1 SH |
691 | ret = 5; |
692 | goto out_free; | |
10bea152 JS |
693 | } |
694 | ||
695 | store.key = (char*)key; | |
480c9e52 AW |
696 | if (!store_write_section(fd, key) || |
697 | !store_write_pair(fd, key, value)) { | |
698 | ret = write_error(); | |
699 | goto out_free; | |
700 | } | |
10bea152 | 701 | } else{ |
88fb958b | 702 | struct stat st; |
10bea152 | 703 | char* contents; |
4ddba79d | 704 | int i, copy_begin, copy_end, new_line = 0; |
10bea152 JS |
705 | |
706 | if (value_regex == NULL) | |
707 | store.value_regex = NULL; | |
708 | else { | |
f98d863d JS |
709 | if (value_regex[0] == '!') { |
710 | store.do_not_match = 1; | |
711 | value_regex++; | |
712 | } else | |
713 | store.do_not_match = 0; | |
714 | ||
2d7320d0 | 715 | store.value_regex = (regex_t*)xmalloc(sizeof(regex_t)); |
10bea152 JS |
716 | if (regcomp(store.value_regex, value_regex, |
717 | REG_EXTENDED)) { | |
7246ed43 | 718 | fprintf(stderr, "Invalid pattern: %s\n", |
10bea152 JS |
719 | value_regex); |
720 | free(store.value_regex); | |
dafc88b1 SH |
721 | ret = 6; |
722 | goto out_free; | |
10bea152 JS |
723 | } |
724 | } | |
725 | ||
4ddba79d | 726 | store.offset[0] = 0; |
10bea152 JS |
727 | store.state = START; |
728 | store.seen = 0; | |
729 | ||
730 | /* | |
731 | * After this, store.offset will contain the *end* offset | |
732 | * of the last match, or remain at 0 if no match was found. | |
733 | * As a side effect, we make sure to transform only a valid | |
734 | * existing config file. | |
735 | */ | |
9c3796fc | 736 | if (git_config_from_file(store_aux, config_filename)) { |
10bea152 JS |
737 | fprintf(stderr, "invalid config file\n"); |
738 | free(store.key); | |
739 | if (store.value_regex != NULL) { | |
740 | regfree(store.value_regex); | |
741 | free(store.value_regex); | |
742 | } | |
dafc88b1 SH |
743 | ret = 3; |
744 | goto out_free; | |
10bea152 JS |
745 | } |
746 | ||
747 | free(store.key); | |
748 | if (store.value_regex != NULL) { | |
749 | regfree(store.value_regex); | |
750 | free(store.value_regex); | |
751 | } | |
752 | ||
4ddba79d JS |
753 | /* if nothing to unset, or too many matches, error out */ |
754 | if ((store.seen == 0 && value == NULL) || | |
755 | (store.seen > 1 && multi_replace == 0)) { | |
dafc88b1 SH |
756 | ret = 5; |
757 | goto out_free; | |
10bea152 JS |
758 | } |
759 | ||
88fb958b | 760 | fstat(in_fd, &st); |
c4712e45 | 761 | contents = xmmap(NULL, st.st_size, PROT_READ, |
10bea152 JS |
762 | MAP_PRIVATE, in_fd, 0); |
763 | close(in_fd); | |
764 | ||
4ddba79d JS |
765 | if (store.seen == 0) |
766 | store.seen = 1; | |
767 | ||
768 | for (i = 0, copy_begin = 0; i < store.seen; i++) { | |
769 | if (store.offset[i] == 0) { | |
770 | store.offset[i] = copy_end = st.st_size; | |
771 | } else if (store.state != KEY_SEEN) { | |
772 | copy_end = store.offset[i]; | |
10bea152 | 773 | } else |
4ddba79d JS |
774 | copy_end = find_beginning_of_line( |
775 | contents, st.st_size, | |
776 | store.offset[i]-2, &new_line); | |
777 | ||
778 | /* write the first part of the config */ | |
779 | if (copy_end > copy_begin) { | |
480c9e52 | 780 | write_in_full(fd, contents + copy_begin, |
4ddba79d JS |
781 | copy_end - copy_begin); |
782 | if (new_line) | |
480c9e52 | 783 | write_in_full(fd, "\n", 1); |
4ddba79d JS |
784 | } |
785 | copy_begin = store.offset[i]; | |
10bea152 JS |
786 | } |
787 | ||
10bea152 JS |
788 | /* write the pair (value == NULL means unset) */ |
789 | if (value != NULL) { | |
790 | if (store.state == START) | |
480c9e52 AW |
791 | if (!store_write_section(fd, key)) { |
792 | ret = write_error(); | |
793 | goto out_free; | |
794 | } | |
795 | if (!store_write_pair(fd, key, value)) { | |
796 | ret = write_error(); | |
797 | goto out_free; | |
798 | } | |
10bea152 JS |
799 | } |
800 | ||
801 | /* write the rest of the config */ | |
4ddba79d | 802 | if (copy_begin < st.st_size) |
480c9e52 | 803 | write_in_full(fd, contents + copy_begin, |
4ddba79d | 804 | st.st_size - copy_begin); |
10bea152 JS |
805 | |
806 | munmap(contents, st.st_size); | |
3a2f2bb3 | 807 | unlink(config_filename); |
10bea152 JS |
808 | } |
809 | ||
3a2f2bb3 | 810 | if (rename(lock_file, config_filename) < 0) { |
10bea152 | 811 | fprintf(stderr, "Could not rename the lock file?\n"); |
dafc88b1 SH |
812 | ret = 4; |
813 | goto out_free; | |
10bea152 JS |
814 | } |
815 | ||
dafc88b1 SH |
816 | ret = 0; |
817 | ||
818 | out_free: | |
f8ba655e JH |
819 | if (0 <= fd) |
820 | close(fd); | |
4cac42b1 | 821 | free(config_filename); |
f8ba655e JH |
822 | if (lock_file) { |
823 | unlink(lock_file); | |
dafc88b1 | 824 | free(lock_file); |
f8ba655e | 825 | } |
dafc88b1 | 826 | return ret; |
10bea152 JS |
827 | } |
828 | ||
0667fcfb JS |
829 | int git_config_rename_section(const char *old_name, const char *new_name) |
830 | { | |
831 | int ret = 0; | |
fc1905bb | 832 | char *config_filename; |
0667fcfb JS |
833 | struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1); |
834 | int out_fd; | |
835 | char buf[1024]; | |
836 | ||
d4ebc36c | 837 | config_filename = getenv(CONFIG_ENVIRONMENT); |
0667fcfb | 838 | if (!config_filename) { |
d4ebc36c | 839 | config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT); |
0667fcfb JS |
840 | if (!config_filename) |
841 | config_filename = git_path("config"); | |
842 | } | |
843 | config_filename = xstrdup(config_filename); | |
844 | out_fd = hold_lock_file_for_update(lock, config_filename, 0); | |
fc1905bb JH |
845 | if (out_fd < 0) { |
846 | ret = error("Could not lock config file!"); | |
847 | goto out; | |
848 | } | |
0667fcfb | 849 | |
fc1905bb JH |
850 | if (!(config_file = fopen(config_filename, "rb"))) { |
851 | ret = error("Could not open config file!"); | |
852 | goto out; | |
853 | } | |
0667fcfb JS |
854 | |
855 | while (fgets(buf, sizeof(buf), config_file)) { | |
856 | int i; | |
480c9e52 | 857 | int length; |
0667fcfb JS |
858 | for (i = 0; buf[i] && isspace(buf[i]); i++) |
859 | ; /* do nothing */ | |
860 | if (buf[i] == '[') { | |
861 | /* it's a section */ | |
862 | int j = 0, dot = 0; | |
863 | for (i++; buf[i] && buf[i] != ']'; i++) { | |
864 | if (!dot && isspace(buf[i])) { | |
865 | dot = 1; | |
866 | if (old_name[j++] != '.') | |
867 | break; | |
868 | for (i++; isspace(buf[i]); i++) | |
869 | ; /* do nothing */ | |
870 | if (buf[i] != '"') | |
871 | break; | |
872 | continue; | |
873 | } | |
874 | if (buf[i] == '\\' && dot) | |
875 | i++; | |
876 | else if (buf[i] == '"' && dot) { | |
877 | for (i++; isspace(buf[i]); i++) | |
878 | ; /* do_nothing */ | |
879 | break; | |
880 | } | |
881 | if (buf[i] != old_name[j++]) | |
882 | break; | |
883 | } | |
884 | if (buf[i] == ']') { | |
885 | /* old_name matches */ | |
886 | ret++; | |
887 | store.baselen = strlen(new_name); | |
480c9e52 AW |
888 | if (!store_write_section(out_fd, new_name)) { |
889 | ret = write_error(); | |
890 | goto out; | |
891 | } | |
0667fcfb JS |
892 | continue; |
893 | } | |
894 | } | |
480c9e52 AW |
895 | length = strlen(buf); |
896 | if (write_in_full(out_fd, buf, length) != length) { | |
897 | ret = write_error(); | |
898 | goto out; | |
899 | } | |
0667fcfb | 900 | } |
fc1905bb | 901 | fclose(config_file); |
0667fcfb | 902 | if (close(out_fd) || commit_lock_file(lock) < 0) |
480c9e52 | 903 | ret = error("Cannot commit config file!"); |
fc1905bb JH |
904 | out: |
905 | free(config_filename); | |
0667fcfb JS |
906 | return ret; |
907 | } | |
4ddba79d | 908 |