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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 | ||
106 | static int get_value(config_fn_t fn, char *name, unsigned int len) | |
107 | { | |
108 | int c; | |
109 | char *value; | |
110 | ||
111 | /* Get the full name */ | |
112 | for (;;) { | |
113 | c = get_next_char(); | |
114 | if (c == EOF) | |
115 | break; | |
116 | if (!isalnum(c)) | |
117 | break; | |
118 | name[len++] = tolower(c); | |
119 | if (len >= MAXNAME) | |
120 | return -1; | |
121 | } | |
122 | name[len] = 0; | |
123 | while (c == ' ' || c == '\t') | |
124 | c = get_next_char(); | |
125 | ||
126 | value = NULL; | |
127 | if (c != '\n') { | |
128 | if (c != '=') | |
129 | return -1; | |
130 | value = parse_value(); | |
131 | if (!value) | |
132 | return -1; | |
133 | } | |
134 | return fn(name, value); | |
135 | } | |
136 | ||
d14f7764 LT |
137 | static int get_extended_base_var(char *name, int baselen, int c) |
138 | { | |
139 | do { | |
140 | if (c == '\n') | |
141 | return -1; | |
142 | c = get_next_char(); | |
143 | } while (isspace(c)); | |
144 | ||
145 | /* We require the format to be '[base "extension"]' */ | |
146 | if (c != '"') | |
147 | return -1; | |
148 | name[baselen++] = '.'; | |
149 | ||
150 | for (;;) { | |
151 | int c = get_next_char(); | |
152 | if (c == '\n') | |
153 | return -1; | |
154 | if (c == '"') | |
155 | break; | |
156 | if (c == '\\') { | |
157 | c = get_next_char(); | |
158 | if (c == '\n') | |
159 | return -1; | |
160 | } | |
161 | name[baselen++] = c; | |
162 | if (baselen > MAXNAME / 2) | |
163 | return -1; | |
164 | } | |
165 | ||
166 | /* Final ']' */ | |
167 | if (get_next_char() != ']') | |
168 | return -1; | |
169 | return baselen; | |
170 | } | |
171 | ||
17712991 LT |
172 | static int get_base_var(char *name) |
173 | { | |
174 | int baselen = 0; | |
175 | ||
176 | for (;;) { | |
177 | int c = get_next_char(); | |
178 | if (c == EOF) | |
179 | return -1; | |
180 | if (c == ']') | |
181 | return baselen; | |
d14f7764 LT |
182 | if (isspace(c)) |
183 | return get_extended_base_var(name, baselen, c); | |
b17e659d | 184 | if (!isalnum(c) && c != '.') |
17712991 LT |
185 | return -1; |
186 | if (baselen > MAXNAME / 2) | |
187 | return -1; | |
188 | name[baselen++] = tolower(c); | |
189 | } | |
190 | } | |
191 | ||
192 | static int git_parse_file(config_fn_t fn) | |
193 | { | |
194 | int comment = 0; | |
195 | int baselen = 0; | |
196 | static char var[MAXNAME]; | |
197 | ||
198 | for (;;) { | |
199 | int c = get_next_char(); | |
200 | if (c == '\n') { | |
201 | /* EOF? */ | |
202 | if (!config_file) | |
203 | return 0; | |
204 | comment = 0; | |
205 | continue; | |
206 | } | |
207 | if (comment || isspace(c)) | |
208 | continue; | |
209 | if (c == '#' || c == ';') { | |
210 | comment = 1; | |
211 | continue; | |
212 | } | |
213 | if (c == '[') { | |
214 | baselen = get_base_var(var); | |
215 | if (baselen <= 0) | |
216 | break; | |
217 | var[baselen++] = '.'; | |
218 | var[baselen] = 0; | |
219 | continue; | |
220 | } | |
221 | if (!isalpha(c)) | |
222 | break; | |
128af9d1 | 223 | var[baselen] = tolower(c); |
17712991 LT |
224 | if (get_value(fn, var, baselen+1) < 0) |
225 | break; | |
226 | } | |
4f629539 | 227 | die("bad config file line %d in %s", config_linenr, config_file_name); |
17712991 LT |
228 | } |
229 | ||
230 | int git_config_int(const char *name, const char *value) | |
231 | { | |
232 | if (value && *value) { | |
233 | char *end; | |
234 | int val = strtol(value, &end, 0); | |
235 | if (!*end) | |
236 | return val; | |
237 | } | |
4f629539 | 238 | die("bad config value for '%s' in %s", name, config_file_name); |
17712991 LT |
239 | } |
240 | ||
241 | int git_config_bool(const char *name, const char *value) | |
242 | { | |
243 | if (!value) | |
244 | return 1; | |
245 | if (!*value) | |
246 | return 0; | |
247 | if (!strcasecmp(value, "true")) | |
248 | return 1; | |
249 | if (!strcasecmp(value, "false")) | |
250 | return 0; | |
251 | return git_config_int(name, value) != 0; | |
252 | } | |
253 | ||
254 | int git_default_config(const char *var, const char *value) | |
255 | { | |
256 | /* This needs a better name */ | |
257 | if (!strcmp(var, "core.filemode")) { | |
258 | trust_executable_bit = git_config_bool(var, value); | |
259 | return 0; | |
260 | } | |
261 | ||
5f73076c JH |
262 | if (!strcmp(var, "core.ignorestat")) { |
263 | assume_unchanged = git_config_bool(var, value); | |
264 | return 0; | |
265 | } | |
266 | ||
e388c738 JH |
267 | if (!strcmp(var, "core.prefersymlinkrefs")) { |
268 | prefer_symlink_refs = git_config_bool(var, value); | |
f8348be3 JS |
269 | return 0; |
270 | } | |
271 | ||
6de08ae6 SP |
272 | if (!strcmp(var, "core.logallrefupdates")) { |
273 | log_all_ref_updates = git_config_bool(var, value); | |
274 | return 0; | |
275 | } | |
276 | ||
2f8acdb3 JH |
277 | if (!strcmp(var, "core.warnambiguousrefs")) { |
278 | warn_ambiguous_refs = git_config_bool(var, value); | |
279 | return 0; | |
280 | } | |
281 | ||
e1b10391 | 282 | if (!strcmp(var, "user.name")) { |
bfbd0bb6 | 283 | safe_strncpy(git_default_name, value, sizeof(git_default_name)); |
e1b10391 LT |
284 | return 0; |
285 | } | |
286 | ||
287 | if (!strcmp(var, "user.email")) { | |
bfbd0bb6 | 288 | safe_strncpy(git_default_email, value, sizeof(git_default_email)); |
e1b10391 LT |
289 | return 0; |
290 | } | |
291 | ||
4e72dcec | 292 | if (!strcmp(var, "i18n.commitencoding")) { |
bfbd0bb6 | 293 | safe_strncpy(git_commit_encoding, value, sizeof(git_commit_encoding)); |
4e72dcec JH |
294 | return 0; |
295 | } | |
296 | ||
1ab661dd | 297 | /* Add other config variables here and to Documentation/config.txt. */ |
17712991 LT |
298 | return 0; |
299 | } | |
300 | ||
4f629539 | 301 | int git_config_from_file(config_fn_t fn, const char *filename) |
17712991 LT |
302 | { |
303 | int ret; | |
4f629539 | 304 | FILE *f = fopen(filename, "r"); |
17712991 LT |
305 | |
306 | ret = -1; | |
307 | if (f) { | |
308 | config_file = f; | |
4f629539 | 309 | config_file_name = filename; |
17712991 LT |
310 | config_linenr = 1; |
311 | ret = git_parse_file(fn); | |
312 | fclose(f); | |
4f629539 | 313 | config_file_name = NULL; |
17712991 LT |
314 | } |
315 | return ret; | |
316 | } | |
10bea152 | 317 | |
4f629539 JH |
318 | int git_config(config_fn_t fn) |
319 | { | |
7f29f7a9 PB |
320 | const char *filename = git_path("config"); |
321 | /* Forward-compatibility cue: $GIT_CONFIG makes git read _only_ | |
322 | * the given config file, $GIT_CONFIG_LOCAL will make it process | |
323 | * it in addition to the global config file, the same way it would | |
324 | * the per-repository config file otherwise. */ | |
325 | if (getenv("GIT_CONFIG")) { | |
326 | filename = getenv("GIT_CONFIG"); | |
327 | } else if (getenv("GIT_CONFIG_LOCAL")) { | |
328 | filename = getenv("GIT_CONFIG_LOCAL"); | |
329 | } | |
330 | return git_config_from_file(fn, filename); | |
4f629539 JH |
331 | } |
332 | ||
10bea152 JS |
333 | /* |
334 | * Find all the stuff for git_config_set() below. | |
335 | */ | |
4ddba79d JS |
336 | |
337 | #define MAX_MATCHES 512 | |
338 | ||
10bea152 JS |
339 | static struct { |
340 | int baselen; | |
341 | char* key; | |
f98d863d | 342 | int do_not_match; |
10bea152 | 343 | regex_t* value_regex; |
4ddba79d JS |
344 | int multi_replace; |
345 | off_t offset[MAX_MATCHES]; | |
10bea152 JS |
346 | enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state; |
347 | int seen; | |
348 | } store; | |
349 | ||
f98d863d JS |
350 | static int matches(const char* key, const char* value) |
351 | { | |
352 | return !strcmp(key, store.key) && | |
353 | (store.value_regex == NULL || | |
354 | (store.do_not_match ^ | |
355 | !regexec(store.value_regex, value, 0, NULL, 0))); | |
356 | } | |
357 | ||
10bea152 JS |
358 | static int store_aux(const char* key, const char* value) |
359 | { | |
360 | switch (store.state) { | |
361 | case KEY_SEEN: | |
f98d863d | 362 | if (matches(key, value)) { |
4ddba79d | 363 | if (store.seen == 1 && store.multi_replace == 0) { |
10bea152 JS |
364 | fprintf(stderr, |
365 | "Warning: %s has multiple values\n", | |
366 | key); | |
4ddba79d JS |
367 | } else if (store.seen >= MAX_MATCHES) { |
368 | fprintf(stderr, "Too many matches\n"); | |
369 | return 1; | |
10bea152 | 370 | } |
4ddba79d JS |
371 | |
372 | store.offset[store.seen] = ftell(config_file); | |
10bea152 JS |
373 | store.seen++; |
374 | } | |
375 | break; | |
376 | case SECTION_SEEN: | |
377 | if (strncmp(key, store.key, store.baselen+1)) { | |
378 | store.state = SECTION_END_SEEN; | |
379 | break; | |
380 | } else | |
4ddba79d JS |
381 | /* do not increment matches: this is no match */ |
382 | store.offset[store.seen] = ftell(config_file); | |
10bea152 JS |
383 | /* fallthru */ |
384 | case SECTION_END_SEEN: | |
385 | case START: | |
f98d863d | 386 | if (matches(key, value)) { |
4ddba79d | 387 | store.offset[store.seen] = ftell(config_file); |
10bea152 JS |
388 | store.state = KEY_SEEN; |
389 | store.seen++; | |
d14f7764 LT |
390 | } else { |
391 | if (strrchr(key, '.') - key == store.baselen && | |
bdf0ef08 | 392 | !strncmp(key, store.key, store.baselen)) { |
93ddef3e | 393 | store.state = SECTION_SEEN; |
bdf0ef08 | 394 | store.offset[store.seen] = ftell(config_file); |
d14f7764 | 395 | } |
bdf0ef08 | 396 | } |
10bea152 JS |
397 | } |
398 | return 0; | |
399 | } | |
400 | ||
401 | static void store_write_section(int fd, const char* key) | |
402 | { | |
d14f7764 LT |
403 | const char *dot = strchr(key, '.'); |
404 | int len1 = store.baselen, len2 = -1; | |
405 | ||
406 | dot = strchr(key, '.'); | |
407 | if (dot) { | |
408 | int dotlen = dot - key; | |
409 | if (dotlen < len1) { | |
410 | len2 = len1 - dotlen - 1; | |
411 | len1 = dotlen; | |
412 | } | |
413 | } | |
414 | ||
10bea152 | 415 | write(fd, "[", 1); |
d14f7764 LT |
416 | write(fd, key, len1); |
417 | if (len2 >= 0) { | |
418 | write(fd, " \"", 2); | |
419 | while (--len2 >= 0) { | |
420 | unsigned char c = *++dot; | |
421 | if (c == '"') | |
422 | write(fd, "\\", 1); | |
423 | write(fd, &c, 1); | |
424 | } | |
425 | write(fd, "\"", 1); | |
426 | } | |
10bea152 JS |
427 | write(fd, "]\n", 2); |
428 | } | |
429 | ||
430 | static void store_write_pair(int fd, const char* key, const char* value) | |
431 | { | |
432 | int i; | |
433 | ||
434 | write(fd, "\t", 1); | |
435 | write(fd, key+store.baselen+1, | |
436 | strlen(key+store.baselen+1)); | |
437 | write(fd, " = ", 3); | |
438 | for (i = 0; value[i]; i++) | |
439 | switch (value[i]) { | |
440 | case '\n': write(fd, "\\n", 2); break; | |
441 | case '\t': write(fd, "\\t", 2); break; | |
442 | case '"': case '\\': write(fd, "\\", 1); | |
443 | default: write(fd, value+i, 1); | |
444 | } | |
445 | write(fd, "\n", 1); | |
446 | } | |
447 | ||
4ddba79d JS |
448 | static int find_beginning_of_line(const char* contents, int size, |
449 | int offset_, int* found_bracket) | |
450 | { | |
451 | int equal_offset = size, bracket_offset = size; | |
452 | int offset; | |
453 | ||
454 | for (offset = offset_-2; offset > 0 | |
455 | && contents[offset] != '\n'; offset--) | |
456 | switch (contents[offset]) { | |
457 | case '=': equal_offset = offset; break; | |
458 | case ']': bracket_offset = offset; break; | |
459 | } | |
460 | if (bracket_offset < equal_offset) { | |
461 | *found_bracket = 1; | |
462 | offset = bracket_offset+1; | |
463 | } else | |
464 | offset++; | |
465 | ||
466 | return offset; | |
467 | } | |
468 | ||
10bea152 JS |
469 | int git_config_set(const char* key, const char* value) |
470 | { | |
4ddba79d | 471 | return git_config_set_multivar(key, value, NULL, 0); |
10bea152 JS |
472 | } |
473 | ||
474 | /* | |
475 | * If value==NULL, unset in (remove from) config, | |
476 | * if value_regex!=NULL, disregard key/value pairs where value does not match. | |
4ddba79d JS |
477 | * if multi_replace==0, nothing, or only one matching key/value is replaced, |
478 | * else all matching key/values (regardless how many) are removed, | |
479 | * before the new pair is written. | |
10bea152 JS |
480 | * |
481 | * Returns 0 on success. | |
482 | * | |
483 | * This function does this: | |
484 | * | |
485 | * - it locks the config file by creating ".git/config.lock" | |
486 | * | |
487 | * - it then parses the config using store_aux() as validator to find | |
488 | * the position on the key/value pair to replace. If it is to be unset, | |
489 | * it must be found exactly once. | |
490 | * | |
491 | * - the config file is mmap()ed and the part before the match (if any) is | |
492 | * written to the lock file, then the changed part and the rest. | |
493 | * | |
494 | * - the config file is removed and the lock file rename()d to it. | |
495 | * | |
496 | */ | |
497 | int git_config_set_multivar(const char* key, const char* value, | |
4ddba79d | 498 | const char* value_regex, int multi_replace) |
10bea152 | 499 | { |
d14f7764 | 500 | int i, dot; |
f8ba655e | 501 | int fd = -1, in_fd; |
dafc88b1 | 502 | int ret; |
9c3796fc JS |
503 | char* config_filename; |
504 | char* lock_file; | |
b17e659d | 505 | const char* last_dot = strrchr(key, '.'); |
4ddba79d | 506 | |
9c3796fc JS |
507 | config_filename = getenv("GIT_CONFIG"); |
508 | if (!config_filename) { | |
509 | config_filename = getenv("GIT_CONFIG_LOCAL"); | |
510 | if (!config_filename) | |
511 | config_filename = git_path("config"); | |
512 | } | |
513 | config_filename = strdup(config_filename); | |
514 | lock_file = strdup(mkpath("%s.lock", config_filename)); | |
515 | ||
10bea152 JS |
516 | /* |
517 | * Since "key" actually contains the section name and the real | |
518 | * key name separated by a dot, we have to know where the dot is. | |
519 | */ | |
b17e659d | 520 | |
dafc88b1 | 521 | if (last_dot == NULL) { |
10bea152 | 522 | fprintf(stderr, "key does not contain a section: %s\n", key); |
dafc88b1 SH |
523 | ret = 2; |
524 | goto out_free; | |
10bea152 | 525 | } |
b17e659d JS |
526 | store.baselen = last_dot - key; |
527 | ||
528 | store.multi_replace = multi_replace; | |
10bea152 JS |
529 | |
530 | /* | |
531 | * Validate the key and while at it, lower case it for matching. | |
532 | */ | |
533 | store.key = (char*)malloc(strlen(key)+1); | |
d14f7764 LT |
534 | dot = 0; |
535 | for (i = 0; key[i]; i++) { | |
536 | unsigned char c = key[i]; | |
537 | if (c == '.') | |
538 | dot = 1; | |
539 | /* Leave the extended basename untouched.. */ | |
540 | if (!dot || i > store.baselen) { | |
541 | if (!isalnum(c) || (i == store.baselen+1 && !isalpha(c))) { | |
542 | fprintf(stderr, "invalid key: %s\n", key); | |
543 | free(store.key); | |
544 | ret = 1; | |
545 | goto out_free; | |
546 | } | |
547 | c = tolower(c); | |
548 | } | |
549 | store.key[i] = c; | |
550 | } | |
3dd94e3b | 551 | store.key[i] = 0; |
10bea152 JS |
552 | |
553 | /* | |
554 | * The lock_file serves a purpose in addition to locking: the new | |
555 | * contents of .git/config will be written into it. | |
556 | */ | |
557 | fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666); | |
138086a7 | 558 | if (fd < 0 || adjust_shared_perm(lock_file)) { |
10bea152 JS |
559 | fprintf(stderr, "could not lock config file\n"); |
560 | free(store.key); | |
dafc88b1 SH |
561 | ret = -1; |
562 | goto out_free; | |
10bea152 JS |
563 | } |
564 | ||
565 | /* | |
566 | * If .git/config does not exist yet, write a minimal version. | |
567 | */ | |
88fb958b AR |
568 | in_fd = open(config_filename, O_RDONLY); |
569 | if ( in_fd < 0 ) { | |
10bea152 JS |
570 | free(store.key); |
571 | ||
88fb958b AR |
572 | if ( ENOENT != errno ) { |
573 | error("opening %s: %s", config_filename, | |
574 | strerror(errno)); | |
dafc88b1 SH |
575 | ret = 3; /* same as "invalid config file" */ |
576 | goto out_free; | |
88fb958b | 577 | } |
10bea152 JS |
578 | /* if nothing to unset, error out */ |
579 | if (value == NULL) { | |
dafc88b1 SH |
580 | ret = 5; |
581 | goto out_free; | |
10bea152 JS |
582 | } |
583 | ||
584 | store.key = (char*)key; | |
10bea152 JS |
585 | store_write_section(fd, key); |
586 | store_write_pair(fd, key, value); | |
587 | } else{ | |
88fb958b | 588 | struct stat st; |
10bea152 | 589 | char* contents; |
4ddba79d | 590 | int i, copy_begin, copy_end, new_line = 0; |
10bea152 JS |
591 | |
592 | if (value_regex == NULL) | |
593 | store.value_regex = NULL; | |
594 | else { | |
f98d863d JS |
595 | if (value_regex[0] == '!') { |
596 | store.do_not_match = 1; | |
597 | value_regex++; | |
598 | } else | |
599 | store.do_not_match = 0; | |
600 | ||
10bea152 JS |
601 | store.value_regex = (regex_t*)malloc(sizeof(regex_t)); |
602 | if (regcomp(store.value_regex, value_regex, | |
603 | REG_EXTENDED)) { | |
7246ed43 | 604 | fprintf(stderr, "Invalid pattern: %s\n", |
10bea152 JS |
605 | value_regex); |
606 | free(store.value_regex); | |
dafc88b1 SH |
607 | ret = 6; |
608 | goto out_free; | |
10bea152 JS |
609 | } |
610 | } | |
611 | ||
4ddba79d | 612 | store.offset[0] = 0; |
10bea152 JS |
613 | store.state = START; |
614 | store.seen = 0; | |
615 | ||
616 | /* | |
617 | * After this, store.offset will contain the *end* offset | |
618 | * of the last match, or remain at 0 if no match was found. | |
619 | * As a side effect, we make sure to transform only a valid | |
620 | * existing config file. | |
621 | */ | |
9c3796fc | 622 | if (git_config_from_file(store_aux, config_filename)) { |
10bea152 JS |
623 | fprintf(stderr, "invalid config file\n"); |
624 | free(store.key); | |
625 | if (store.value_regex != NULL) { | |
626 | regfree(store.value_regex); | |
627 | free(store.value_regex); | |
628 | } | |
dafc88b1 SH |
629 | ret = 3; |
630 | goto out_free; | |
10bea152 JS |
631 | } |
632 | ||
633 | free(store.key); | |
634 | if (store.value_regex != NULL) { | |
635 | regfree(store.value_regex); | |
636 | free(store.value_regex); | |
637 | } | |
638 | ||
4ddba79d JS |
639 | /* if nothing to unset, or too many matches, error out */ |
640 | if ((store.seen == 0 && value == NULL) || | |
641 | (store.seen > 1 && multi_replace == 0)) { | |
dafc88b1 SH |
642 | ret = 5; |
643 | goto out_free; | |
10bea152 JS |
644 | } |
645 | ||
88fb958b | 646 | fstat(in_fd, &st); |
10bea152 JS |
647 | contents = mmap(NULL, st.st_size, PROT_READ, |
648 | MAP_PRIVATE, in_fd, 0); | |
649 | close(in_fd); | |
650 | ||
4ddba79d JS |
651 | if (store.seen == 0) |
652 | store.seen = 1; | |
653 | ||
654 | for (i = 0, copy_begin = 0; i < store.seen; i++) { | |
655 | if (store.offset[i] == 0) { | |
656 | store.offset[i] = copy_end = st.st_size; | |
657 | } else if (store.state != KEY_SEEN) { | |
658 | copy_end = store.offset[i]; | |
10bea152 | 659 | } else |
4ddba79d JS |
660 | copy_end = find_beginning_of_line( |
661 | contents, st.st_size, | |
662 | store.offset[i]-2, &new_line); | |
663 | ||
664 | /* write the first part of the config */ | |
665 | if (copy_end > copy_begin) { | |
666 | write(fd, contents + copy_begin, | |
667 | copy_end - copy_begin); | |
668 | if (new_line) | |
669 | write(fd, "\n", 1); | |
670 | } | |
671 | copy_begin = store.offset[i]; | |
10bea152 JS |
672 | } |
673 | ||
10bea152 JS |
674 | /* write the pair (value == NULL means unset) */ |
675 | if (value != NULL) { | |
676 | if (store.state == START) | |
677 | store_write_section(fd, key); | |
678 | store_write_pair(fd, key, value); | |
679 | } | |
680 | ||
681 | /* write the rest of the config */ | |
4ddba79d JS |
682 | if (copy_begin < st.st_size) |
683 | write(fd, contents + copy_begin, | |
684 | st.st_size - copy_begin); | |
10bea152 JS |
685 | |
686 | munmap(contents, st.st_size); | |
3a2f2bb3 | 687 | unlink(config_filename); |
10bea152 JS |
688 | } |
689 | ||
3a2f2bb3 | 690 | if (rename(lock_file, config_filename) < 0) { |
10bea152 | 691 | fprintf(stderr, "Could not rename the lock file?\n"); |
dafc88b1 SH |
692 | ret = 4; |
693 | goto out_free; | |
10bea152 JS |
694 | } |
695 | ||
dafc88b1 SH |
696 | ret = 0; |
697 | ||
698 | out_free: | |
f8ba655e JH |
699 | if (0 <= fd) |
700 | close(fd); | |
dafc88b1 SH |
701 | if (config_filename) |
702 | free(config_filename); | |
f8ba655e JH |
703 | if (lock_file) { |
704 | unlink(lock_file); | |
dafc88b1 | 705 | free(lock_file); |
f8ba655e | 706 | } |
dafc88b1 | 707 | return ret; |
10bea152 JS |
708 | } |
709 | ||
4ddba79d | 710 |