Merge commit 'junio/next' into next
[git/platforms/storm.git] / config.c
blob5195de10c9289a25053756ce799e654d5e01483e
1 /*
2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
7 */
8 #include "cache.h"
9 #include "exec_cmd.h"
11 #define MAXNAME (256)
13 static FILE *config_file;
14 static const char *config_file_name;
15 static int config_linenr;
16 static int config_file_eof;
17 static int zlib_compression_seen;
19 static int get_next_char(void)
21 int c;
22 FILE *f;
24 c = '\n';
25 if ((f = config_file) != NULL) {
26 c = fgetc(f);
27 if (c == '\r') {
28 /* DOS like systems */
29 c = fgetc(f);
30 if (c != '\n') {
31 ungetc(c, f);
32 c = '\r';
35 if (c == '\n')
36 config_linenr++;
37 if (c == EOF) {
38 config_file_eof = 1;
39 c = '\n';
42 return c;
45 static char *parse_value(void)
47 static char value[1024];
48 int quote = 0, comment = 0, len = 0, space = 0;
50 for (;;) {
51 int c = get_next_char();
52 if (len >= sizeof(value))
53 return NULL;
54 if (c == '\n') {
55 if (quote)
56 return NULL;
57 value[len] = 0;
58 return value;
60 if (comment)
61 continue;
62 if (isspace(c) && !quote) {
63 space = 1;
64 continue;
66 if (!quote) {
67 if (c == ';' || c == '#') {
68 comment = 1;
69 continue;
72 if (space) {
73 if (len)
74 value[len++] = ' ';
75 space = 0;
77 if (c == '\\') {
78 c = get_next_char();
79 switch (c) {
80 case '\n':
81 continue;
82 case 't':
83 c = '\t';
84 break;
85 case 'b':
86 c = '\b';
87 break;
88 case 'n':
89 c = '\n';
90 break;
91 /* Some characters escape as themselves */
92 case '\\': case '"':
93 break;
94 /* Reject unknown escape sequences */
95 default:
96 return NULL;
98 value[len++] = c;
99 continue;
101 if (c == '"') {
102 quote = 1-quote;
103 continue;
105 value[len++] = c;
109 static inline int iskeychar(int c)
111 return isalnum(c) || c == '-';
114 static int get_value(config_fn_t fn, char *name, unsigned int len)
116 int c;
117 char *value;
119 /* Get the full name */
120 for (;;) {
121 c = get_next_char();
122 if (config_file_eof)
123 break;
124 if (!iskeychar(c))
125 break;
126 name[len++] = tolower(c);
127 if (len >= MAXNAME)
128 return -1;
130 name[len] = 0;
131 while (c == ' ' || c == '\t')
132 c = get_next_char();
134 value = NULL;
135 if (c != '\n') {
136 if (c != '=')
137 return -1;
138 value = parse_value();
139 if (!value)
140 return -1;
142 return fn(name, value);
145 static int get_extended_base_var(char *name, int baselen, int c)
147 do {
148 if (c == '\n')
149 return -1;
150 c = get_next_char();
151 } while (isspace(c));
153 /* We require the format to be '[base "extension"]' */
154 if (c != '"')
155 return -1;
156 name[baselen++] = '.';
158 for (;;) {
159 int c = get_next_char();
160 if (c == '\n')
161 return -1;
162 if (c == '"')
163 break;
164 if (c == '\\') {
165 c = get_next_char();
166 if (c == '\n')
167 return -1;
169 name[baselen++] = c;
170 if (baselen > MAXNAME / 2)
171 return -1;
174 /* Final ']' */
175 if (get_next_char() != ']')
176 return -1;
177 return baselen;
180 static int get_base_var(char *name)
182 int baselen = 0;
184 for (;;) {
185 int c = get_next_char();
186 if (config_file_eof)
187 return -1;
188 if (c == ']')
189 return baselen;
190 if (isspace(c))
191 return get_extended_base_var(name, baselen, c);
192 if (!iskeychar(c) && c != '.')
193 return -1;
194 if (baselen > MAXNAME / 2)
195 return -1;
196 name[baselen++] = tolower(c);
200 static int git_parse_file(config_fn_t fn)
202 int comment = 0;
203 int baselen = 0;
204 static char var[MAXNAME];
206 for (;;) {
207 int c = get_next_char();
208 if (c == '\n') {
209 if (config_file_eof)
210 return 0;
211 comment = 0;
212 continue;
214 if (comment || isspace(c))
215 continue;
216 if (c == '#' || c == ';') {
217 comment = 1;
218 continue;
220 if (c == '[') {
221 baselen = get_base_var(var);
222 if (baselen <= 0)
223 break;
224 var[baselen++] = '.';
225 var[baselen] = 0;
226 continue;
228 if (!isalpha(c))
229 break;
230 var[baselen] = tolower(c);
231 if (get_value(fn, var, baselen+1) < 0)
232 break;
234 die("bad config file line %d in %s", config_linenr, config_file_name);
237 static int parse_unit_factor(const char *end, unsigned long *val)
239 if (!*end)
240 return 1;
241 else if (!strcasecmp(end, "k")) {
242 *val *= 1024;
243 return 1;
245 else if (!strcasecmp(end, "m")) {
246 *val *= 1024 * 1024;
247 return 1;
249 else if (!strcasecmp(end, "g")) {
250 *val *= 1024 * 1024 * 1024;
251 return 1;
253 return 0;
256 int git_parse_long(const char *value, long *ret)
258 if (value && *value) {
259 char *end;
260 long val = strtol(value, &end, 0);
261 unsigned long factor = 1;
262 if (!parse_unit_factor(end, &factor))
263 return 0;
264 *ret = val * factor;
265 return 1;
267 return 0;
270 int git_parse_ulong(const char *value, unsigned long *ret)
272 if (value && *value) {
273 char *end;
274 unsigned long val = strtoul(value, &end, 0);
275 if (!parse_unit_factor(end, &val))
276 return 0;
277 *ret = val;
278 return 1;
280 return 0;
283 static void die_bad_config(const char *name)
285 if (config_file_name)
286 die("bad config value for '%s' in %s", name, config_file_name);
287 die("bad config value for '%s'", name);
290 int git_config_int(const char *name, const char *value)
292 long ret;
293 if (!git_parse_long(value, &ret))
294 die_bad_config(name);
295 return ret;
298 unsigned long git_config_ulong(const char *name, const char *value)
300 unsigned long ret;
301 if (!git_parse_ulong(value, &ret))
302 die_bad_config(name);
303 return ret;
306 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
308 *is_bool = 1;
309 if (!value)
310 return 1;
311 if (!*value)
312 return 0;
313 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
314 return 1;
315 if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
316 return 0;
317 *is_bool = 0;
318 return git_config_int(name, value);
321 int git_config_bool(const char *name, const char *value)
323 int discard;
324 return !!git_config_bool_or_int(name, value, &discard);
327 int git_config_string(const char **dest, const char *var, const char *value)
329 if (!value)
330 return config_error_nonbool(var);
331 *dest = xstrdup(value);
332 return 0;
335 int git_default_config(const char *var, const char *value)
337 /* This needs a better name */
338 if (!strcmp(var, "core.filemode")) {
339 trust_executable_bit = git_config_bool(var, value);
340 return 0;
343 if (!strcmp(var, "core.quotepath")) {
344 quote_path_fully = git_config_bool(var, value);
345 return 0;
348 if (!strcmp(var, "core.symlinks")) {
349 has_symlinks = git_config_bool(var, value);
350 return 0;
353 if (!strcmp(var, "core.ignorecase")) {
354 ignore_case = git_config_bool(var, value);
355 return 0;
358 if (!strcmp(var, "core.bare")) {
359 is_bare_repository_cfg = git_config_bool(var, value);
360 return 0;
363 if (!strcmp(var, "core.ignorestat")) {
364 assume_unchanged = git_config_bool(var, value);
365 return 0;
368 if (!strcmp(var, "core.prefersymlinkrefs")) {
369 prefer_symlink_refs = git_config_bool(var, value);
370 return 0;
373 if (!strcmp(var, "core.logallrefupdates")) {
374 log_all_ref_updates = git_config_bool(var, value);
375 return 0;
378 if (!strcmp(var, "core.warnambiguousrefs")) {
379 warn_ambiguous_refs = git_config_bool(var, value);
380 return 0;
383 if (!strcmp(var, "core.loosecompression")) {
384 int level = git_config_int(var, value);
385 if (level == -1)
386 level = Z_DEFAULT_COMPRESSION;
387 else if (level < 0 || level > Z_BEST_COMPRESSION)
388 die("bad zlib compression level %d", level);
389 zlib_compression_level = level;
390 zlib_compression_seen = 1;
391 return 0;
394 if (!strcmp(var, "core.compression")) {
395 int level = git_config_int(var, value);
396 if (level == -1)
397 level = Z_DEFAULT_COMPRESSION;
398 else if (level < 0 || level > Z_BEST_COMPRESSION)
399 die("bad zlib compression level %d", level);
400 core_compression_level = level;
401 core_compression_seen = 1;
402 if (!zlib_compression_seen)
403 zlib_compression_level = level;
404 return 0;
407 if (!strcmp(var, "core.packedgitwindowsize")) {
408 int pgsz_x2 = getpagesize() * 2;
409 packed_git_window_size = git_config_int(var, value);
411 /* This value must be multiple of (pagesize * 2) */
412 packed_git_window_size /= pgsz_x2;
413 if (packed_git_window_size < 1)
414 packed_git_window_size = 1;
415 packed_git_window_size *= pgsz_x2;
416 return 0;
419 if (!strcmp(var, "core.packedgitlimit")) {
420 packed_git_limit = git_config_int(var, value);
421 return 0;
424 if (!strcmp(var, "core.deltabasecachelimit")) {
425 delta_base_cache_limit = git_config_int(var, value);
426 return 0;
429 if (!strcmp(var, "core.autocrlf")) {
430 if (value && !strcasecmp(value, "input")) {
431 auto_crlf = -1;
432 return 0;
434 auto_crlf = git_config_bool(var, value);
435 return 0;
438 if (!strcmp(var, "core.safecrlf")) {
439 if (value && !strcasecmp(value, "warn")) {
440 safe_crlf = SAFE_CRLF_WARN;
441 return 0;
443 safe_crlf = git_config_bool(var, value);
444 return 0;
447 if (!strcmp(var, "user.name")) {
448 if (!value)
449 return config_error_nonbool(var);
450 strlcpy(git_default_name, value, sizeof(git_default_name));
451 if (git_default_email[0])
452 user_ident_explicitly_given = 1;
453 return 0;
456 if (!strcmp(var, "user.email")) {
457 if (!value)
458 return config_error_nonbool(var);
459 strlcpy(git_default_email, value, sizeof(git_default_email));
460 if (git_default_name[0])
461 user_ident_explicitly_given = 1;
462 return 0;
465 if (!strcmp(var, "i18n.commitencoding"))
466 return git_config_string(&git_commit_encoding, var, value);
468 if (!strcmp(var, "i18n.logoutputencoding"))
469 return git_config_string(&git_log_output_encoding, var, value);
471 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
472 pager_use_color = git_config_bool(var,value);
473 return 0;
476 if (!strcmp(var, "core.pager"))
477 return git_config_string(&pager_program, var, value);
479 if (!strcmp(var, "core.editor"))
480 return git_config_string(&editor_program, var, value);
482 if (!strcmp(var, "core.excludesfile"))
483 return git_config_string(&excludes_file, var, value);
485 if (!strcmp(var, "core.whitespace")) {
486 if (!value)
487 return config_error_nonbool(var);
488 whitespace_rule_cfg = parse_whitespace_rule(value);
489 return 0;
491 if (!strcmp(var, "branch.autosetupmerge")) {
492 if (value && !strcasecmp(value, "always")) {
493 git_branch_track = BRANCH_TRACK_ALWAYS;
494 return 0;
496 git_branch_track = git_config_bool(var, value);
497 return 0;
499 if (!strcmp(var, "branch.autosetuprebase")) {
500 if (!value)
501 return config_error_nonbool(var);
502 else if (!strcmp(value, "never"))
503 autorebase = AUTOREBASE_NEVER;
504 else if (!strcmp(value, "local"))
505 autorebase = AUTOREBASE_LOCAL;
506 else if (!strcmp(value, "remote"))
507 autorebase = AUTOREBASE_REMOTE;
508 else if (!strcmp(value, "always"))
509 autorebase = AUTOREBASE_ALWAYS;
510 else
511 return error("Malformed value for %s", var);
512 return 0;
515 /* Add other config variables here and to Documentation/config.txt. */
516 return 0;
519 int git_config_from_file(config_fn_t fn, const char *filename)
521 int ret;
522 FILE *f = fopen(filename, "r");
524 ret = -1;
525 if (f) {
526 config_file = f;
527 config_file_name = filename;
528 config_linenr = 1;
529 config_file_eof = 0;
530 ret = git_parse_file(fn);
531 fclose(f);
532 config_file_name = NULL;
534 return ret;
537 const char *git_etc_gitconfig(void)
539 static const char *system_wide;
540 if (!system_wide) {
541 system_wide = ETC_GITCONFIG;
542 if (!is_absolute_path(system_wide)) {
543 /* interpret path relative to exec-dir */
544 struct strbuf d = STRBUF_INIT;
545 strbuf_addf(&d, "%s/%s", git_exec_path(), system_wide);
546 system_wide = strbuf_detach(&d, NULL);
549 return system_wide;
552 int git_env_bool(const char *k, int def)
554 const char *v = getenv(k);
555 return v ? git_config_bool(k, v) : def;
558 int git_config_system(void)
560 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
563 int git_config_global(void)
565 return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
568 int git_config(config_fn_t fn)
570 int ret = 0;
571 char *repo_config = NULL;
572 const char *home = NULL, *filename;
574 /* $GIT_CONFIG makes git read _only_ the given config file,
575 * $GIT_CONFIG_LOCAL will make it process it in addition to the
576 * global config file, the same way it would the per-repository
577 * config file otherwise. */
578 filename = getenv(CONFIG_ENVIRONMENT);
579 if (!filename) {
580 if (git_config_system() && !access(git_etc_gitconfig(), R_OK))
581 ret += git_config_from_file(fn, git_etc_gitconfig());
582 home = getenv("HOME");
583 filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
584 if (!filename)
585 filename = repo_config = xstrdup(git_path("config"));
588 if (git_config_global() && home) {
589 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
590 if (!access(user_config, R_OK))
591 ret = git_config_from_file(fn, user_config);
592 free(user_config);
595 ret += git_config_from_file(fn, filename);
596 free(repo_config);
597 return ret;
601 * Find all the stuff for git_config_set() below.
604 #define MAX_MATCHES 512
606 static struct {
607 int baselen;
608 char* key;
609 int do_not_match;
610 regex_t* value_regex;
611 int multi_replace;
612 size_t offset[MAX_MATCHES];
613 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
614 int seen;
615 } store;
617 static int matches(const char* key, const char* value)
619 return !strcmp(key, store.key) &&
620 (store.value_regex == NULL ||
621 (store.do_not_match ^
622 !regexec(store.value_regex, value, 0, NULL, 0)));
625 static int store_aux(const char* key, const char* value)
627 const char *ep;
628 size_t section_len;
630 switch (store.state) {
631 case KEY_SEEN:
632 if (matches(key, value)) {
633 if (store.seen == 1 && store.multi_replace == 0) {
634 warning("%s has multiple values", key);
635 } else if (store.seen >= MAX_MATCHES) {
636 error("too many matches for %s", key);
637 return 1;
640 store.offset[store.seen] = ftell(config_file);
641 store.seen++;
643 break;
644 case SECTION_SEEN:
646 * What we are looking for is in store.key (both
647 * section and var), and its section part is baselen
648 * long. We found key (again, both section and var).
649 * We would want to know if this key is in the same
650 * section as what we are looking for. We already
651 * know we are in the same section as what should
652 * hold store.key.
654 ep = strrchr(key, '.');
655 section_len = ep - key;
657 if ((section_len != store.baselen) ||
658 memcmp(key, store.key, section_len+1)) {
659 store.state = SECTION_END_SEEN;
660 break;
664 * Do not increment matches: this is no match, but we
665 * just made sure we are in the desired section.
667 store.offset[store.seen] = ftell(config_file);
668 /* fallthru */
669 case SECTION_END_SEEN:
670 case START:
671 if (matches(key, value)) {
672 store.offset[store.seen] = ftell(config_file);
673 store.state = KEY_SEEN;
674 store.seen++;
675 } else {
676 if (strrchr(key, '.') - key == store.baselen &&
677 !strncmp(key, store.key, store.baselen)) {
678 store.state = SECTION_SEEN;
679 store.offset[store.seen] = ftell(config_file);
683 return 0;
686 static int write_error(const char *filename)
688 error("failed to write new configuration file %s", filename);
690 /* Same error code as "failed to rename". */
691 return 4;
694 static int store_write_section(int fd, const char* key)
696 const char *dot;
697 int i, success;
698 struct strbuf sb;
700 strbuf_init(&sb, 0);
701 dot = memchr(key, '.', store.baselen);
702 if (dot) {
703 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
704 for (i = dot - key + 1; i < store.baselen; i++) {
705 if (key[i] == '"' || key[i] == '\\')
706 strbuf_addch(&sb, '\\');
707 strbuf_addch(&sb, key[i]);
709 strbuf_addstr(&sb, "\"]\n");
710 } else {
711 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
714 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
715 strbuf_release(&sb);
717 return success;
720 static int store_write_pair(int fd, const char* key, const char* value)
722 int i, success;
723 int length = strlen(key + store.baselen + 1);
724 const char *quote = "";
725 struct strbuf sb;
728 * Check to see if the value needs to be surrounded with a dq pair.
729 * Note that problematic characters are always backslash-quoted; this
730 * check is about not losing leading or trailing SP and strings that
731 * follow beginning-of-comment characters (i.e. ';' and '#') by the
732 * configuration parser.
734 if (value[0] == ' ')
735 quote = "\"";
736 for (i = 0; value[i]; i++)
737 if (value[i] == ';' || value[i] == '#')
738 quote = "\"";
739 if (i && value[i - 1] == ' ')
740 quote = "\"";
742 strbuf_init(&sb, 0);
743 strbuf_addf(&sb, "\t%.*s = %s",
744 length, key + store.baselen + 1, quote);
746 for (i = 0; value[i]; i++)
747 switch (value[i]) {
748 case '\n':
749 strbuf_addstr(&sb, "\\n");
750 break;
751 case '\t':
752 strbuf_addstr(&sb, "\\t");
753 break;
754 case '"':
755 case '\\':
756 strbuf_addch(&sb, '\\');
757 default:
758 strbuf_addch(&sb, value[i]);
759 break;
761 strbuf_addf(&sb, "%s\n", quote);
763 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
764 strbuf_release(&sb);
766 return success;
769 static ssize_t find_beginning_of_line(const char* contents, size_t size,
770 size_t offset_, int* found_bracket)
772 size_t equal_offset = size, bracket_offset = size;
773 ssize_t offset;
775 contline:
776 for (offset = offset_-2; offset > 0
777 && contents[offset] != '\n'; offset--)
778 switch (contents[offset]) {
779 case '=': equal_offset = offset; break;
780 case ']': bracket_offset = offset; break;
782 if (offset > 0 && contents[offset-1] == '\\') {
783 offset_ = offset;
784 goto contline;
786 if (bracket_offset < equal_offset) {
787 *found_bracket = 1;
788 offset = bracket_offset+1;
789 } else
790 offset++;
792 return offset;
795 int git_config_set(const char* key, const char* value)
797 return git_config_set_multivar(key, value, NULL, 0);
801 * If value==NULL, unset in (remove from) config,
802 * if value_regex!=NULL, disregard key/value pairs where value does not match.
803 * if multi_replace==0, nothing, or only one matching key/value is replaced,
804 * else all matching key/values (regardless how many) are removed,
805 * before the new pair is written.
807 * Returns 0 on success.
809 * This function does this:
811 * - it locks the config file by creating ".git/config.lock"
813 * - it then parses the config using store_aux() as validator to find
814 * the position on the key/value pair to replace. If it is to be unset,
815 * it must be found exactly once.
817 * - the config file is mmap()ed and the part before the match (if any) is
818 * written to the lock file, then the changed part and the rest.
820 * - the config file is removed and the lock file rename()d to it.
823 int git_config_set_multivar(const char* key, const char* value,
824 const char* value_regex, int multi_replace)
826 int i, dot;
827 int fd = -1, in_fd;
828 int ret;
829 char* config_filename;
830 struct lock_file *lock = NULL;
831 const char* last_dot = strrchr(key, '.');
833 config_filename = getenv(CONFIG_ENVIRONMENT);
834 if (!config_filename) {
835 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
836 if (!config_filename)
837 config_filename = git_path("config");
839 config_filename = xstrdup(config_filename);
842 * Since "key" actually contains the section name and the real
843 * key name separated by a dot, we have to know where the dot is.
846 if (last_dot == NULL) {
847 error("key does not contain a section: %s", key);
848 ret = 2;
849 goto out_free;
851 store.baselen = last_dot - key;
853 store.multi_replace = multi_replace;
856 * Validate the key and while at it, lower case it for matching.
858 store.key = xmalloc(strlen(key) + 1);
859 dot = 0;
860 for (i = 0; key[i]; i++) {
861 unsigned char c = key[i];
862 if (c == '.')
863 dot = 1;
864 /* Leave the extended basename untouched.. */
865 if (!dot || i > store.baselen) {
866 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
867 error("invalid key: %s", key);
868 free(store.key);
869 ret = 1;
870 goto out_free;
872 c = tolower(c);
873 } else if (c == '\n') {
874 error("invalid key (newline): %s", key);
875 free(store.key);
876 ret = 1;
877 goto out_free;
879 store.key[i] = c;
881 store.key[i] = 0;
884 * The lock serves a purpose in addition to locking: the new
885 * contents of .git/config will be written into it.
887 lock = xcalloc(sizeof(struct lock_file), 1);
888 fd = hold_lock_file_for_update(lock, config_filename, 0);
889 if (fd < 0) {
890 error("could not lock config file %s", config_filename);
891 free(store.key);
892 ret = -1;
893 goto out_free;
897 * If .git/config does not exist yet, write a minimal version.
899 in_fd = open(config_filename, O_RDONLY);
900 if ( in_fd < 0 ) {
901 free(store.key);
903 if ( ENOENT != errno ) {
904 error("opening %s: %s", config_filename,
905 strerror(errno));
906 ret = 3; /* same as "invalid config file" */
907 goto out_free;
909 /* if nothing to unset, error out */
910 if (value == NULL) {
911 ret = 5;
912 goto out_free;
915 store.key = (char*)key;
916 if (!store_write_section(fd, key) ||
917 !store_write_pair(fd, key, value))
918 goto write_err_out;
919 } else {
920 struct stat st;
921 char* contents;
922 size_t contents_sz, copy_begin, copy_end;
923 int i, new_line = 0;
925 if (value_regex == NULL)
926 store.value_regex = NULL;
927 else {
928 if (value_regex[0] == '!') {
929 store.do_not_match = 1;
930 value_regex++;
931 } else
932 store.do_not_match = 0;
934 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
935 if (regcomp(store.value_regex, value_regex,
936 REG_EXTENDED)) {
937 error("invalid pattern: %s", value_regex);
938 free(store.value_regex);
939 ret = 6;
940 goto out_free;
944 store.offset[0] = 0;
945 store.state = START;
946 store.seen = 0;
949 * After this, store.offset will contain the *end* offset
950 * of the last match, or remain at 0 if no match was found.
951 * As a side effect, we make sure to transform only a valid
952 * existing config file.
954 if (git_config_from_file(store_aux, config_filename)) {
955 error("invalid config file %s", config_filename);
956 free(store.key);
957 if (store.value_regex != NULL) {
958 regfree(store.value_regex);
959 free(store.value_regex);
961 ret = 3;
962 goto out_free;
965 free(store.key);
966 if (store.value_regex != NULL) {
967 regfree(store.value_regex);
968 free(store.value_regex);
971 /* if nothing to unset, or too many matches, error out */
972 if ((store.seen == 0 && value == NULL) ||
973 (store.seen > 1 && multi_replace == 0)) {
974 ret = 5;
975 goto out_free;
978 fstat(in_fd, &st);
979 contents_sz = xsize_t(st.st_size);
980 contents = xmmap(NULL, contents_sz, PROT_READ,
981 MAP_PRIVATE, in_fd, 0);
982 close(in_fd);
984 if (store.seen == 0)
985 store.seen = 1;
987 for (i = 0, copy_begin = 0; i < store.seen; i++) {
988 if (store.offset[i] == 0) {
989 store.offset[i] = copy_end = contents_sz;
990 } else if (store.state != KEY_SEEN) {
991 copy_end = store.offset[i];
992 } else
993 copy_end = find_beginning_of_line(
994 contents, contents_sz,
995 store.offset[i]-2, &new_line);
997 if (copy_end > 0 && contents[copy_end-1] != '\n')
998 new_line = 1;
1000 /* write the first part of the config */
1001 if (copy_end > copy_begin) {
1002 if (write_in_full(fd, contents + copy_begin,
1003 copy_end - copy_begin) <
1004 copy_end - copy_begin)
1005 goto write_err_out;
1006 if (new_line &&
1007 write_in_full(fd, "\n", 1) != 1)
1008 goto write_err_out;
1010 copy_begin = store.offset[i];
1013 /* write the pair (value == NULL means unset) */
1014 if (value != NULL) {
1015 if (store.state == START) {
1016 if (!store_write_section(fd, key))
1017 goto write_err_out;
1019 if (!store_write_pair(fd, key, value))
1020 goto write_err_out;
1023 /* write the rest of the config */
1024 if (copy_begin < contents_sz)
1025 if (write_in_full(fd, contents + copy_begin,
1026 contents_sz - copy_begin) <
1027 contents_sz - copy_begin)
1028 goto write_err_out;
1030 munmap(contents, contents_sz);
1033 if (commit_lock_file(lock) < 0) {
1034 error("could not commit config file %s", config_filename);
1035 ret = 4;
1036 goto out_free;
1040 * lock is committed, so don't try to roll it back below.
1041 * NOTE: Since lockfile.c keeps a linked list of all created
1042 * lock_file structures, it isn't safe to free(lock). It's
1043 * better to just leave it hanging around.
1045 lock = NULL;
1046 ret = 0;
1048 out_free:
1049 if (lock)
1050 rollback_lock_file(lock);
1051 free(config_filename);
1052 return ret;
1054 write_err_out:
1055 ret = write_error(lock->filename);
1056 goto out_free;
1060 static int section_name_match (const char *buf, const char *name)
1062 int i = 0, j = 0, dot = 0;
1063 for (; buf[i] && buf[i] != ']'; i++) {
1064 if (!dot && isspace(buf[i])) {
1065 dot = 1;
1066 if (name[j++] != '.')
1067 break;
1068 for (i++; isspace(buf[i]); i++)
1069 ; /* do nothing */
1070 if (buf[i] != '"')
1071 break;
1072 continue;
1074 if (buf[i] == '\\' && dot)
1075 i++;
1076 else if (buf[i] == '"' && dot) {
1077 for (i++; isspace(buf[i]); i++)
1078 ; /* do_nothing */
1079 break;
1081 if (buf[i] != name[j++])
1082 break;
1084 return (buf[i] == ']' && name[j] == 0);
1087 /* if new_name == NULL, the section is removed instead */
1088 int git_config_rename_section(const char *old_name, const char *new_name)
1090 int ret = 0, remove = 0;
1091 char *config_filename;
1092 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1093 int out_fd;
1094 char buf[1024];
1096 config_filename = getenv(CONFIG_ENVIRONMENT);
1097 if (!config_filename) {
1098 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
1099 if (!config_filename)
1100 config_filename = git_path("config");
1102 config_filename = xstrdup(config_filename);
1103 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1104 if (out_fd < 0) {
1105 ret = error("could not lock config file %s", config_filename);
1106 goto out;
1109 if (!(config_file = fopen(config_filename, "rb"))) {
1110 /* no config file means nothing to rename, no error */
1111 goto unlock_and_out;
1114 while (fgets(buf, sizeof(buf), config_file)) {
1115 int i;
1116 int length;
1117 for (i = 0; buf[i] && isspace(buf[i]); i++)
1118 ; /* do nothing */
1119 if (buf[i] == '[') {
1120 /* it's a section */
1121 if (section_name_match (&buf[i+1], old_name)) {
1122 ret++;
1123 if (new_name == NULL) {
1124 remove = 1;
1125 continue;
1127 store.baselen = strlen(new_name);
1128 if (!store_write_section(out_fd, new_name)) {
1129 ret = write_error(lock->filename);
1130 goto out;
1132 continue;
1134 remove = 0;
1136 if (remove)
1137 continue;
1138 length = strlen(buf);
1139 if (write_in_full(out_fd, buf, length) != length) {
1140 ret = write_error(lock->filename);
1141 goto out;
1144 fclose(config_file);
1145 unlock_and_out:
1146 if (commit_lock_file(lock) < 0)
1147 ret = error("could not commit config file %s", config_filename);
1148 out:
1149 free(config_filename);
1150 return ret;
1154 * Call this to report error for your variable that should not
1155 * get a boolean value (i.e. "[my] var" means "true").
1157 int config_error_nonbool(const char *var)
1159 return error("Missing value for '%s'", var);