Add RelNotes 1.5.0.1
[git/git.git] / config.c
CommitLineData
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
12static FILE *config_file;
0dccc7dc 13static const char *config_file_name;
17712991
LT
14static int config_linenr;
15static 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
41static 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
105static inline int iskeychar(int c)
106{
107 return isalnum(c) || c == '-';
108}
109
17712991
LT
110static 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
141static 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
176static 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
196static 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
234int 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
251int 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
264int 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
7d1864ce
JH
272 if (!strcmp(var, "core.bare")) {
273 is_bare_repository_cfg = git_config_bool(var, value);
274 return 0;
275 }
276
5f73076c
JH
277 if (!strcmp(var, "core.ignorestat")) {
278 assume_unchanged = git_config_bool(var, value);
279 return 0;
280 }
281
e388c738
JH
282 if (!strcmp(var, "core.prefersymlinkrefs")) {
283 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
284 return 0;
285 }
286
6de08ae6
SP
287 if (!strcmp(var, "core.logallrefupdates")) {
288 log_all_ref_updates = git_config_bool(var, value);
289 return 0;
290 }
291
2f8acdb3
JH
292 if (!strcmp(var, "core.warnambiguousrefs")) {
293 warn_ambiguous_refs = git_config_bool(var, value);
294 return 0;
295 }
296
93821bd9
LT
297 if (!strcmp(var, "core.legacyheaders")) {
298 use_legacy_headers = git_config_bool(var, value);
299 return 0;
300 }
301
12f6c308
JBH
302 if (!strcmp(var, "core.compression")) {
303 int level = git_config_int(var, value);
304 if (level == -1)
305 level = Z_DEFAULT_COMPRESSION;
306 else if (level < 0 || level > Z_BEST_COMPRESSION)
307 die("bad zlib compression level %d", level);
308 zlib_compression_level = level;
309 return 0;
310 }
311
60bb8b14
SP
312 if (!strcmp(var, "core.packedgitwindowsize")) {
313 int pgsz = getpagesize();
314 packed_git_window_size = git_config_int(var, value);
315 packed_git_window_size /= pgsz;
40be8272
SP
316 if (packed_git_window_size < 2)
317 packed_git_window_size = 2;
60bb8b14
SP
318 packed_git_window_size *= pgsz;
319 return 0;
320 }
321
77ccc5bb
SP
322 if (!strcmp(var, "core.packedgitlimit")) {
323 packed_git_limit = git_config_int(var, value);
324 return 0;
325 }
326
e1b10391 327 if (!strcmp(var, "user.name")) {
817151e6 328 strlcpy(git_default_name, value, sizeof(git_default_name));
e1b10391
LT
329 return 0;
330 }
331
332 if (!strcmp(var, "user.email")) {
817151e6 333 strlcpy(git_default_email, value, sizeof(git_default_email));
e1b10391
LT
334 return 0;
335 }
336
4e72dcec 337 if (!strcmp(var, "i18n.commitencoding")) {
d2c11a38 338 git_commit_encoding = strdup(value);
4e72dcec
JH
339 return 0;
340 }
341
d2c11a38
JH
342 if (!strcmp(var, "i18n.logoutputencoding")) {
343 git_log_output_encoding = strdup(value);
344 return 0;
345 }
346
347
a159ca0c 348 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
aa086eb8
ML
349 pager_use_color = git_config_bool(var,value);
350 return 0;
351 }
352
1ab661dd 353 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
354 return 0;
355}
356
4f629539 357int git_config_from_file(config_fn_t fn, const char *filename)
17712991
LT
358{
359 int ret;
4f629539 360 FILE *f = fopen(filename, "r");
17712991
LT
361
362 ret = -1;
363 if (f) {
364 config_file = f;
4f629539 365 config_file_name = filename;
17712991
LT
366 config_linenr = 1;
367 ret = git_parse_file(fn);
368 fclose(f);
4f629539 369 config_file_name = NULL;
17712991
LT
370 }
371 return ret;
372}
10bea152 373
4f629539
JH
374int git_config(config_fn_t fn)
375{
5f1a63e0
JS
376 int ret = 0;
377 char *repo_config = NULL;
378 const char *home = NULL, *filename;
379
380 /* $GIT_CONFIG makes git read _only_ the given config file,
381 * $GIT_CONFIG_LOCAL will make it process it in addition to the
382 * global config file, the same way it would the per-repository
383 * config file otherwise. */
d4ebc36c 384 filename = getenv(CONFIG_ENVIRONMENT);
5f1a63e0
JS
385 if (!filename) {
386 home = getenv("HOME");
d4ebc36c 387 filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
5f1a63e0 388 if (!filename)
9befac47 389 filename = repo_config = xstrdup(git_path("config"));
7f29f7a9 390 }
5f1a63e0
JS
391
392 if (home) {
9befac47 393 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
e33d0611 394 if (!access(user_config, R_OK))
5f1a63e0
JS
395 ret = git_config_from_file(fn, user_config);
396 free(user_config);
397 }
398
399 ret += git_config_from_file(fn, filename);
4cac42b1 400 free(repo_config);
5f1a63e0 401 return ret;
4f629539
JH
402}
403
10bea152
JS
404/*
405 * Find all the stuff for git_config_set() below.
406 */
4ddba79d
JS
407
408#define MAX_MATCHES 512
409
10bea152
JS
410static struct {
411 int baselen;
412 char* key;
f98d863d 413 int do_not_match;
10bea152 414 regex_t* value_regex;
4ddba79d
JS
415 int multi_replace;
416 off_t offset[MAX_MATCHES];
10bea152
JS
417 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
418 int seen;
419} store;
420
f98d863d
JS
421static int matches(const char* key, const char* value)
422{
423 return !strcmp(key, store.key) &&
424 (store.value_regex == NULL ||
425 (store.do_not_match ^
426 !regexec(store.value_regex, value, 0, NULL, 0)));
427}
428
10bea152
JS
429static int store_aux(const char* key, const char* value)
430{
431 switch (store.state) {
432 case KEY_SEEN:
f98d863d 433 if (matches(key, value)) {
4ddba79d 434 if (store.seen == 1 && store.multi_replace == 0) {
10bea152
JS
435 fprintf(stderr,
436 "Warning: %s has multiple values\n",
437 key);
4ddba79d
JS
438 } else if (store.seen >= MAX_MATCHES) {
439 fprintf(stderr, "Too many matches\n");
440 return 1;
10bea152 441 }
4ddba79d
JS
442
443 store.offset[store.seen] = ftell(config_file);
10bea152
JS
444 store.seen++;
445 }
446 break;
447 case SECTION_SEEN:
448 if (strncmp(key, store.key, store.baselen+1)) {
449 store.state = SECTION_END_SEEN;
450 break;
451 } else
4ddba79d
JS
452 /* do not increment matches: this is no match */
453 store.offset[store.seen] = ftell(config_file);
10bea152
JS
454 /* fallthru */
455 case SECTION_END_SEEN:
456 case START:
f98d863d 457 if (matches(key, value)) {
4ddba79d 458 store.offset[store.seen] = ftell(config_file);
10bea152
JS
459 store.state = KEY_SEEN;
460 store.seen++;
d14f7764
LT
461 } else {
462 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 463 !strncmp(key, store.key, store.baselen)) {
93ddef3e 464 store.state = SECTION_SEEN;
bdf0ef08 465 store.offset[store.seen] = ftell(config_file);
d14f7764 466 }
bdf0ef08 467 }
10bea152
JS
468 }
469 return 0;
470}
471
480c9e52
AW
472static int write_error()
473{
474 fprintf(stderr, "Failed to write new configuration file\n");
475
476 /* Same error code as "failed to rename". */
477 return 4;
478}
479
480static int store_write_section(int fd, const char* key)
10bea152 481{
d14f7764
LT
482 const char *dot = strchr(key, '.');
483 int len1 = store.baselen, len2 = -1;
484
485 dot = strchr(key, '.');
486 if (dot) {
487 int dotlen = dot - key;
488 if (dotlen < len1) {
489 len2 = len1 - dotlen - 1;
490 len1 = dotlen;
491 }
492 }
493
480c9e52
AW
494 if (write_in_full(fd, "[", 1) != 1 ||
495 write_in_full(fd, key, len1) != len1)
496 return 0;
d14f7764 497 if (len2 >= 0) {
480c9e52
AW
498 if (write_in_full(fd, " \"", 2) != 2)
499 return 0;
d14f7764
LT
500 while (--len2 >= 0) {
501 unsigned char c = *++dot;
502 if (c == '"')
480c9e52
AW
503 if (write_in_full(fd, "\\", 1) != 1)
504 return 0;
505 if (write_in_full(fd, &c, 1) != 1)
506 return 0;
d14f7764 507 }
480c9e52
AW
508 if (write_in_full(fd, "\"", 1) != 1)
509 return 0;
d14f7764 510 }
480c9e52
AW
511 if (write_in_full(fd, "]\n", 2) != 2)
512 return 0;
513
514 return 1;
10bea152
JS
515}
516
480c9e52 517static int store_write_pair(int fd, const char* key, const char* value)
10bea152
JS
518{
519 int i;
480c9e52 520 int length = strlen(key+store.baselen+1);
cdd4fb15
BG
521 int quote = 0;
522
523 /* Check to see if the value needs to be quoted. */
524 if (value[0] == ' ')
525 quote = 1;
526 for (i = 0; value[i]; i++)
527 if (value[i] == ';' || value[i] == '#')
528 quote = 1;
529 if (value[i-1] == ' ')
530 quote = 1;
10bea152 531
480c9e52
AW
532 if (write_in_full(fd, "\t", 1) != 1 ||
533 write_in_full(fd, key+store.baselen+1, length) != length ||
534 write_in_full(fd, " = ", 3) != 3)
535 return 0;
cdd4fb15
BG
536 if (quote && write_in_full(fd, "\"", 1) != 1)
537 return 0;
10bea152
JS
538 for (i = 0; value[i]; i++)
539 switch (value[i]) {
480c9e52
AW
540 case '\n':
541 if (write_in_full(fd, "\\n", 2) != 2)
542 return 0;
543 break;
544 case '\t':
545 if (write_in_full(fd, "\\t", 2) != 2)
546 return 0;
547 break;
548 case '"':
549 case '\\':
550 if (write_in_full(fd, "\\", 1) != 1)
551 return 0;
552 default:
553 if (write_in_full(fd, value+i, 1) != 1)
554 return 0;
555 break;
556 }
cdd4fb15
BG
557 if (quote && write_in_full(fd, "\"", 1) != 1)
558 return 0;
480c9e52
AW
559 if (write_in_full(fd, "\n", 1) != 1)
560 return 0;
561 return 1;
10bea152
JS
562}
563
4ddba79d
JS
564static int find_beginning_of_line(const char* contents, int size,
565 int offset_, int* found_bracket)
566{
567 int equal_offset = size, bracket_offset = size;
568 int offset;
569
570 for (offset = offset_-2; offset > 0
571 && contents[offset] != '\n'; offset--)
572 switch (contents[offset]) {
573 case '=': equal_offset = offset; break;
574 case ']': bracket_offset = offset; break;
575 }
576 if (bracket_offset < equal_offset) {
577 *found_bracket = 1;
578 offset = bracket_offset+1;
579 } else
580 offset++;
581
582 return offset;
583}
584
10bea152
JS
585int git_config_set(const char* key, const char* value)
586{
4ddba79d 587 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
588}
589
590/*
591 * If value==NULL, unset in (remove from) config,
592 * if value_regex!=NULL, disregard key/value pairs where value does not match.
4ddba79d
JS
593 * if multi_replace==0, nothing, or only one matching key/value is replaced,
594 * else all matching key/values (regardless how many) are removed,
595 * before the new pair is written.
10bea152
JS
596 *
597 * Returns 0 on success.
598 *
599 * This function does this:
600 *
601 * - it locks the config file by creating ".git/config.lock"
602 *
603 * - it then parses the config using store_aux() as validator to find
604 * the position on the key/value pair to replace. If it is to be unset,
605 * it must be found exactly once.
606 *
607 * - the config file is mmap()ed and the part before the match (if any) is
608 * written to the lock file, then the changed part and the rest.
609 *
610 * - the config file is removed and the lock file rename()d to it.
611 *
612 */
613int git_config_set_multivar(const char* key, const char* value,
4ddba79d 614 const char* value_regex, int multi_replace)
10bea152 615{
d14f7764 616 int i, dot;
f8ba655e 617 int fd = -1, in_fd;
dafc88b1 618 int ret;
9c3796fc
JS
619 char* config_filename;
620 char* lock_file;
b17e659d 621 const char* last_dot = strrchr(key, '.');
4ddba79d 622
d4ebc36c 623 config_filename = getenv(CONFIG_ENVIRONMENT);
9c3796fc 624 if (!config_filename) {
d4ebc36c 625 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
9c3796fc
JS
626 if (!config_filename)
627 config_filename = git_path("config");
628 }
9befac47
SP
629 config_filename = xstrdup(config_filename);
630 lock_file = xstrdup(mkpath("%s.lock", config_filename));
9c3796fc 631
10bea152
JS
632 /*
633 * Since "key" actually contains the section name and the real
634 * key name separated by a dot, we have to know where the dot is.
635 */
b17e659d 636
dafc88b1 637 if (last_dot == NULL) {
10bea152 638 fprintf(stderr, "key does not contain a section: %s\n", key);
dafc88b1
SH
639 ret = 2;
640 goto out_free;
10bea152 641 }
b17e659d
JS
642 store.baselen = last_dot - key;
643
644 store.multi_replace = multi_replace;
10bea152
JS
645
646 /*
647 * Validate the key and while at it, lower case it for matching.
648 */
2d7320d0 649 store.key = xmalloc(strlen(key) + 1);
d14f7764
LT
650 dot = 0;
651 for (i = 0; key[i]; i++) {
652 unsigned char c = key[i];
653 if (c == '.')
654 dot = 1;
655 /* Leave the extended basename untouched.. */
656 if (!dot || i > store.baselen) {
38c5afa8 657 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
d14f7764
LT
658 fprintf(stderr, "invalid key: %s\n", key);
659 free(store.key);
660 ret = 1;
661 goto out_free;
662 }
663 c = tolower(c);
6f71686e
JS
664 } else if (c == '\n') {
665 fprintf(stderr, "invalid key (newline): %s\n", key);
666 free(store.key);
667 ret = 1;
668 goto out_free;
d14f7764
LT
669 }
670 store.key[i] = c;
671 }
3dd94e3b 672 store.key[i] = 0;
10bea152
JS
673
674 /*
675 * The lock_file serves a purpose in addition to locking: the new
676 * contents of .git/config will be written into it.
677 */
678 fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666);
138086a7 679 if (fd < 0 || adjust_shared_perm(lock_file)) {
10bea152
JS
680 fprintf(stderr, "could not lock config file\n");
681 free(store.key);
dafc88b1
SH
682 ret = -1;
683 goto out_free;
10bea152
JS
684 }
685
686 /*
687 * If .git/config does not exist yet, write a minimal version.
688 */
88fb958b
AR
689 in_fd = open(config_filename, O_RDONLY);
690 if ( in_fd < 0 ) {
10bea152
JS
691 free(store.key);
692
88fb958b
AR
693 if ( ENOENT != errno ) {
694 error("opening %s: %s", config_filename,
695 strerror(errno));
dafc88b1
SH
696 ret = 3; /* same as "invalid config file" */
697 goto out_free;
88fb958b 698 }
10bea152
JS
699 /* if nothing to unset, error out */
700 if (value == NULL) {
dafc88b1
SH
701 ret = 5;
702 goto out_free;
10bea152
JS
703 }
704
705 store.key = (char*)key;
480c9e52 706 if (!store_write_section(fd, key) ||
93c1e079
JH
707 !store_write_pair(fd, key, value))
708 goto write_err_out;
709 } else {
88fb958b 710 struct stat st;
10bea152 711 char* contents;
4ddba79d 712 int i, copy_begin, copy_end, new_line = 0;
10bea152
JS
713
714 if (value_regex == NULL)
715 store.value_regex = NULL;
716 else {
f98d863d
JS
717 if (value_regex[0] == '!') {
718 store.do_not_match = 1;
719 value_regex++;
720 } else
721 store.do_not_match = 0;
722
2d7320d0 723 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
724 if (regcomp(store.value_regex, value_regex,
725 REG_EXTENDED)) {
7246ed43 726 fprintf(stderr, "Invalid pattern: %s\n",
10bea152
JS
727 value_regex);
728 free(store.value_regex);
dafc88b1
SH
729 ret = 6;
730 goto out_free;
10bea152
JS
731 }
732 }
733
4ddba79d 734 store.offset[0] = 0;
10bea152
JS
735 store.state = START;
736 store.seen = 0;
737
738 /*
739 * After this, store.offset will contain the *end* offset
740 * of the last match, or remain at 0 if no match was found.
741 * As a side effect, we make sure to transform only a valid
742 * existing config file.
743 */
9c3796fc 744 if (git_config_from_file(store_aux, config_filename)) {
10bea152
JS
745 fprintf(stderr, "invalid config file\n");
746 free(store.key);
747 if (store.value_regex != NULL) {
748 regfree(store.value_regex);
749 free(store.value_regex);
750 }
dafc88b1
SH
751 ret = 3;
752 goto out_free;
10bea152
JS
753 }
754
755 free(store.key);
756 if (store.value_regex != NULL) {
757 regfree(store.value_regex);
758 free(store.value_regex);
759 }
760
4ddba79d
JS
761 /* if nothing to unset, or too many matches, error out */
762 if ((store.seen == 0 && value == NULL) ||
763 (store.seen > 1 && multi_replace == 0)) {
dafc88b1
SH
764 ret = 5;
765 goto out_free;
10bea152
JS
766 }
767
88fb958b 768 fstat(in_fd, &st);
c4712e45 769 contents = xmmap(NULL, st.st_size, PROT_READ,
10bea152
JS
770 MAP_PRIVATE, in_fd, 0);
771 close(in_fd);
772
4ddba79d
JS
773 if (store.seen == 0)
774 store.seen = 1;
775
776 for (i = 0, copy_begin = 0; i < store.seen; i++) {
777 if (store.offset[i] == 0) {
778 store.offset[i] = copy_end = st.st_size;
779 } else if (store.state != KEY_SEEN) {
780 copy_end = store.offset[i];
10bea152 781 } else
4ddba79d
JS
782 copy_end = find_beginning_of_line(
783 contents, st.st_size,
784 store.offset[i]-2, &new_line);
785
786 /* write the first part of the config */
787 if (copy_end > copy_begin) {
93c1e079
JH
788 if (write_in_full(fd, contents + copy_begin,
789 copy_end - copy_begin) <
790 copy_end - copy_begin)
791 goto write_err_out;
792 if (new_line &&
793 write_in_full(fd, "\n", 1) != 1)
794 goto write_err_out;
4ddba79d
JS
795 }
796 copy_begin = store.offset[i];
10bea152
JS
797 }
798
10bea152
JS
799 /* write the pair (value == NULL means unset) */
800 if (value != NULL) {
93c1e079
JH
801 if (store.state == START) {
802 if (!store_write_section(fd, key))
803 goto write_err_out;
480c9e52 804 }
93c1e079
JH
805 if (!store_write_pair(fd, key, value))
806 goto write_err_out;
10bea152
JS
807 }
808
809 /* write the rest of the config */
4ddba79d 810 if (copy_begin < st.st_size)
93c1e079
JH
811 if (write_in_full(fd, contents + copy_begin,
812 st.st_size - copy_begin) <
813 st.st_size - copy_begin)
814 goto write_err_out;
10bea152
JS
815
816 munmap(contents, st.st_size);
3a2f2bb3 817 unlink(config_filename);
10bea152
JS
818 }
819
3a2f2bb3 820 if (rename(lock_file, config_filename) < 0) {
10bea152 821 fprintf(stderr, "Could not rename the lock file?\n");
dafc88b1
SH
822 ret = 4;
823 goto out_free;
10bea152
JS
824 }
825
dafc88b1
SH
826 ret = 0;
827
828out_free:
f8ba655e
JH
829 if (0 <= fd)
830 close(fd);
4cac42b1 831 free(config_filename);
f8ba655e
JH
832 if (lock_file) {
833 unlink(lock_file);
dafc88b1 834 free(lock_file);
f8ba655e 835 }
dafc88b1 836 return ret;
93c1e079
JH
837
838write_err_out:
839 ret = write_error();
840 goto out_free;
841
10bea152
JS
842}
843
0667fcfb
JS
844int git_config_rename_section(const char *old_name, const char *new_name)
845{
846 int ret = 0;
fc1905bb 847 char *config_filename;
0667fcfb
JS
848 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
849 int out_fd;
850 char buf[1024];
851
d4ebc36c 852 config_filename = getenv(CONFIG_ENVIRONMENT);
0667fcfb 853 if (!config_filename) {
d4ebc36c 854 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
0667fcfb
JS
855 if (!config_filename)
856 config_filename = git_path("config");
857 }
858 config_filename = xstrdup(config_filename);
859 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb
JH
860 if (out_fd < 0) {
861 ret = error("Could not lock config file!");
862 goto out;
863 }
0667fcfb 864
fc1905bb
JH
865 if (!(config_file = fopen(config_filename, "rb"))) {
866 ret = error("Could not open config file!");
867 goto out;
868 }
0667fcfb
JS
869
870 while (fgets(buf, sizeof(buf), config_file)) {
871 int i;
480c9e52 872 int length;
0667fcfb
JS
873 for (i = 0; buf[i] && isspace(buf[i]); i++)
874 ; /* do nothing */
875 if (buf[i] == '[') {
876 /* it's a section */
877 int j = 0, dot = 0;
878 for (i++; buf[i] && buf[i] != ']'; i++) {
879 if (!dot && isspace(buf[i])) {
880 dot = 1;
881 if (old_name[j++] != '.')
882 break;
883 for (i++; isspace(buf[i]); i++)
884 ; /* do nothing */
885 if (buf[i] != '"')
886 break;
887 continue;
888 }
889 if (buf[i] == '\\' && dot)
890 i++;
891 else if (buf[i] == '"' && dot) {
892 for (i++; isspace(buf[i]); i++)
893 ; /* do_nothing */
894 break;
895 }
896 if (buf[i] != old_name[j++])
897 break;
898 }
9673a0b1 899 if (buf[i] == ']' && old_name[j] == 0) {
0667fcfb
JS
900 /* old_name matches */
901 ret++;
902 store.baselen = strlen(new_name);
480c9e52
AW
903 if (!store_write_section(out_fd, new_name)) {
904 ret = write_error();
905 goto out;
906 }
0667fcfb
JS
907 continue;
908 }
909 }
480c9e52
AW
910 length = strlen(buf);
911 if (write_in_full(out_fd, buf, length) != length) {
912 ret = write_error();
913 goto out;
914 }
0667fcfb 915 }
fc1905bb 916 fclose(config_file);
0667fcfb 917 if (close(out_fd) || commit_lock_file(lock) < 0)
480c9e52 918 ret = error("Cannot commit config file!");
fc1905bb
JH
919 out:
920 free(config_filename);
0667fcfb
JS
921 return ret;
922}
4ddba79d 923