2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
13 static FILE *config_file;
14 static const char *config_file_name;
15 static int config_linenr;
16 static int get_next_char(void)
22 if ((f = config_file) != NULL) {
25 /* DOS like systems */
42 static char *parse_value(void)
44 static char value[1024];
45 int quote = 0, comment = 0, len = 0, space = 0;
48 int c = get_next_char();
49 if (len >= sizeof(value))
59 if (isspace(c) && !quote) {
64 if (c == ';' || c == '#') {
88 /* Some characters escape as themselves */
91 /* Reject unknown escape sequences */
106 static int get_value(config_fn_t fn, char *name, unsigned int len)
111 /* Get the full name */
118 name[len++] = tolower(c);
123 while (c == ' ' || c == '\t')
130 value = parse_value();
134 return fn(name, value);
137 static int get_extended_base_var(char *name, int baselen, int c)
143 } while (isspace(c));
145 /* We require the format to be '[base "extension"]' */
148 name[baselen++] = '.';
151 int c = get_next_char();
162 if (baselen > MAXNAME / 2)
167 if (get_next_char() != ']')
172 static int get_base_var(char *name)
177 int c = get_next_char();
183 return get_extended_base_var(name, baselen, c);
184 if (!isalnum(c) && c != '.')
186 if (baselen > MAXNAME / 2)
188 name[baselen++] = tolower(c);
192 static int git_parse_file(config_fn_t fn)
196 static char var[MAXNAME];
199 int c = get_next_char();
207 if (comment || isspace(c))
209 if (c == '#' || c == ';') {
214 baselen = get_base_var(var);
217 var[baselen++] = '.';
223 var[baselen] = tolower(c);
224 if (get_value(fn, var, baselen+1) < 0)
227 die("bad config file line %d in %s", config_linenr, config_file_name);
230 int git_config_int(const char *name, const char *value)
232 if (value && *value) {
234 int val = strtol(value, &end, 0);
238 die("bad config value for '%s' in %s", name, config_file_name);
241 int git_config_bool(const char *name, const char *value)
247 if (!strcasecmp(value, "true"))
249 if (!strcasecmp(value, "false"))
251 return git_config_int(name, value) != 0;
254 int git_default_config(const char *var, const char *value)
256 /* This needs a better name */
257 if (!strcmp(var, "core.filemode")) {
258 trust_executable_bit = git_config_bool(var, value);
262 if (!strcmp(var, "core.ignorestat")) {
263 assume_unchanged = git_config_bool(var, value);
267 if (!strcmp(var, "core.prefersymlinkrefs")) {
268 prefer_symlink_refs = git_config_bool(var, value);
272 if (!strcmp(var, "core.logallrefupdates")) {
273 log_all_ref_updates = git_config_bool(var, value);
277 if (!strcmp(var, "core.warnambiguousrefs")) {
278 warn_ambiguous_refs = git_config_bool(var, value);
282 if (!strcmp(var, "user.name")) {
283 strncpy(git_default_name, value, sizeof(git_default_name));
287 if (!strcmp(var, "user.email")) {
288 strncpy(git_default_email, value, sizeof(git_default_email));
292 if (!strcmp(var, "i18n.commitencoding")) {
293 strncpy(git_commit_encoding, value, sizeof(git_commit_encoding));
297 /* Add other config variables here and to Documentation/config.txt. */
301 int git_config_from_file(config_fn_t fn, const char *filename)
304 FILE *f = fopen(filename, "r");
309 config_file_name = filename;
311 ret = git_parse_file(fn);
313 config_file_name = NULL;
318 int git_config(config_fn_t fn)
321 const char *home = getenv("HOME");
324 ret = git_config_from_file(fn, mkpath("%s/.gitconfig", home));
325 /* ignore if global config does not exist */
330 ret += git_config_from_file(fn, git_path("config"));
335 * Find all the stuff for git_config_set() below.
338 #define MAX_MATCHES 512
344 regex_t* value_regex;
346 off_t offset[MAX_MATCHES];
347 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
351 static int matches(const char* key, const char* value)
353 return !strcmp(key, store.key) &&
354 (store.value_regex == NULL ||
355 (store.do_not_match ^
356 !regexec(store.value_regex, value, 0, NULL, 0)));
359 static int store_aux(const char* key, const char* value)
361 switch (store.state) {
363 if (matches(key, value)) {
364 if (store.seen == 1 && store.multi_replace == 0) {
366 "Warning: %s has multiple values\n",
368 } else if (store.seen >= MAX_MATCHES) {
369 fprintf(stderr, "Too many matches\n");
373 store.offset[store.seen] = ftell(config_file);
378 if (strncmp(key, store.key, store.baselen+1)) {
379 store.state = SECTION_END_SEEN;
382 /* do not increment matches: this is no match */
383 store.offset[store.seen] = ftell(config_file);
385 case SECTION_END_SEEN:
387 if (matches(key, value)) {
388 store.offset[store.seen] = ftell(config_file);
389 store.state = KEY_SEEN;
392 if (strrchr(key, '.') - key == store.baselen &&
393 !strncmp(key, store.key, store.baselen)) {
394 store.state = SECTION_SEEN;
395 store.offset[store.seen] = ftell(config_file);
402 static void store_write_section(int fd, const char* key)
404 const char *dot = strchr(key, '.');
405 int len1 = store.baselen, len2 = -1;
407 dot = strchr(key, '.');
409 int dotlen = dot - key;
411 len2 = len1 - dotlen - 1;
417 write(fd, key, len1);
420 while (--len2 >= 0) {
421 unsigned char c = *++dot;
431 static void store_write_pair(int fd, const char* key, const char* value)
436 write(fd, key+store.baselen+1,
437 strlen(key+store.baselen+1));
439 for (i = 0; value[i]; i++)
441 case '\n': write(fd, "\\n", 2); break;
442 case '\t': write(fd, "\\t", 2); break;
443 case '"': case '\\': write(fd, "\\", 1);
444 default: write(fd, value+i, 1);
449 static int find_beginning_of_line(const char* contents, int size,
450 int offset_, int* found_bracket)
452 int equal_offset = size, bracket_offset = size;
455 for (offset = offset_-2; offset > 0
456 && contents[offset] != '\n'; offset--)
457 switch (contents[offset]) {
458 case '=': equal_offset = offset; break;
459 case ']': bracket_offset = offset; break;
461 if (bracket_offset < equal_offset) {
463 offset = bracket_offset+1;
470 int git_config_set(const char* key, const char* value)
472 return git_config_set_multivar(key, value, NULL, 0);
476 * If value==NULL, unset in (remove from) config,
477 * if value_regex!=NULL, disregard key/value pairs where value does not match.
478 * if multi_replace==0, nothing, or only one matching key/value is replaced,
479 * else all matching key/values (regardless how many) are removed,
480 * before the new pair is written.
482 * Returns 0 on success.
484 * This function does this:
486 * - it locks the config file by creating ".git/config.lock"
488 * - it then parses the config using store_aux() as validator to find
489 * the position on the key/value pair to replace. If it is to be unset,
490 * it must be found exactly once.
492 * - the config file is mmap()ed and the part before the match (if any) is
493 * written to the lock file, then the changed part and the rest.
495 * - the config file is removed and the lock file rename()d to it.
498 int git_config_set_multivar(const char* key, const char* value,
499 const char* value_regex, int multi_replace)
504 char* config_filename = strdup(git_path("config"));
505 char* lock_file = strdup(git_path("config.lock"));
506 const char* last_dot = strrchr(key, '.');
509 * Since "key" actually contains the section name and the real
510 * key name separated by a dot, we have to know where the dot is.
513 if (last_dot == NULL) {
514 fprintf(stderr, "key does not contain a section: %s\n", key);
518 store.baselen = last_dot - key;
520 store.multi_replace = multi_replace;
523 * Validate the key and while at it, lower case it for matching.
525 store.key = (char*)malloc(strlen(key)+1);
527 for (i = 0; key[i]; i++) {
528 unsigned char c = key[i];
531 /* Leave the extended basename untouched.. */
532 if (!dot || i > store.baselen) {
533 if (!isalnum(c) || (i == store.baselen+1 && !isalpha(c))) {
534 fprintf(stderr, "invalid key: %s\n", key);
546 * The lock_file serves a purpose in addition to locking: the new
547 * contents of .git/config will be written into it.
549 fd = open(lock_file, O_WRONLY | O_CREAT | O_EXCL, 0666);
550 if (fd < 0 || adjust_shared_perm(lock_file)) {
551 fprintf(stderr, "could not lock config file\n");
558 * If .git/config does not exist yet, write a minimal version.
560 in_fd = open(config_filename, O_RDONLY);
564 if ( ENOENT != errno ) {
565 error("opening %s: %s", config_filename,
567 ret = 3; /* same as "invalid config file" */
570 /* if nothing to unset, error out */
576 store.key = (char*)key;
577 store_write_section(fd, key);
578 store_write_pair(fd, key, value);
582 int i, copy_begin, copy_end, new_line = 0;
584 if (value_regex == NULL)
585 store.value_regex = NULL;
587 if (value_regex[0] == '!') {
588 store.do_not_match = 1;
591 store.do_not_match = 0;
593 store.value_regex = (regex_t*)malloc(sizeof(regex_t));
594 if (regcomp(store.value_regex, value_regex,
596 fprintf(stderr, "Invalid pattern: %s\n",
598 free(store.value_regex);
609 * After this, store.offset will contain the *end* offset
610 * of the last match, or remain at 0 if no match was found.
611 * As a side effect, we make sure to transform only a valid
612 * existing config file.
614 if (git_config(store_aux)) {
615 fprintf(stderr, "invalid config file\n");
617 if (store.value_regex != NULL) {
618 regfree(store.value_regex);
619 free(store.value_regex);
626 if (store.value_regex != NULL) {
627 regfree(store.value_regex);
628 free(store.value_regex);
631 /* if nothing to unset, or too many matches, error out */
632 if ((store.seen == 0 && value == NULL) ||
633 (store.seen > 1 && multi_replace == 0)) {
639 contents = mmap(NULL, st.st_size, PROT_READ,
640 MAP_PRIVATE, in_fd, 0);
646 for (i = 0, copy_begin = 0; i < store.seen; i++) {
647 if (store.offset[i] == 0) {
648 store.offset[i] = copy_end = st.st_size;
649 } else if (store.state != KEY_SEEN) {
650 copy_end = store.offset[i];
652 copy_end = find_beginning_of_line(
653 contents, st.st_size,
654 store.offset[i]-2, &new_line);
656 /* write the first part of the config */
657 if (copy_end > copy_begin) {
658 write(fd, contents + copy_begin,
659 copy_end - copy_begin);
663 copy_begin = store.offset[i];
666 /* write the pair (value == NULL means unset) */
668 if (store.state == START)
669 store_write_section(fd, key);
670 store_write_pair(fd, key, value);
673 /* write the rest of the config */
674 if (copy_begin < st.st_size)
675 write(fd, contents + copy_begin,
676 st.st_size - copy_begin);
678 munmap(contents, st.st_size);
679 unlink(config_filename);
682 if (rename(lock_file, config_filename) < 0) {
683 fprintf(stderr, "Could not rename the lock file?\n");
694 free(config_filename);