t4200: use cut instead of sed
[git/peff.git] / config.c
blob862b0e619cd7431d6cce40efcef25aa5263de82c
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(const char *name, const char *value)
308 if (!value)
309 return 1;
310 if (!*value)
311 return 0;
312 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
313 return 1;
314 if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
315 return 0;
316 return git_config_int(name, value) != 0;
319 int git_config_string(const char **dest, const char *var, const char *value)
321 if (!value)
322 return config_error_nonbool(var);
323 *dest = xstrdup(value);
324 return 0;
327 int git_default_config(const char *var, const char *value)
329 /* This needs a better name */
330 if (!strcmp(var, "core.filemode")) {
331 trust_executable_bit = git_config_bool(var, value);
332 return 0;
335 if (!strcmp(var, "core.quotepath")) {
336 quote_path_fully = git_config_bool(var, value);
337 return 0;
340 if (!strcmp(var, "core.symlinks")) {
341 has_symlinks = git_config_bool(var, value);
342 return 0;
345 if (!strcmp(var, "core.bare")) {
346 is_bare_repository_cfg = git_config_bool(var, value);
347 return 0;
350 if (!strcmp(var, "core.ignorestat")) {
351 assume_unchanged = git_config_bool(var, value);
352 return 0;
355 if (!strcmp(var, "core.prefersymlinkrefs")) {
356 prefer_symlink_refs = git_config_bool(var, value);
357 return 0;
360 if (!strcmp(var, "core.logallrefupdates")) {
361 log_all_ref_updates = git_config_bool(var, value);
362 return 0;
365 if (!strcmp(var, "core.warnambiguousrefs")) {
366 warn_ambiguous_refs = git_config_bool(var, value);
367 return 0;
370 if (!strcmp(var, "core.loosecompression")) {
371 int level = git_config_int(var, value);
372 if (level == -1)
373 level = Z_DEFAULT_COMPRESSION;
374 else if (level < 0 || level > Z_BEST_COMPRESSION)
375 die("bad zlib compression level %d", level);
376 zlib_compression_level = level;
377 zlib_compression_seen = 1;
378 return 0;
381 if (!strcmp(var, "core.compression")) {
382 int level = git_config_int(var, value);
383 if (level == -1)
384 level = Z_DEFAULT_COMPRESSION;
385 else if (level < 0 || level > Z_BEST_COMPRESSION)
386 die("bad zlib compression level %d", level);
387 core_compression_level = level;
388 core_compression_seen = 1;
389 if (!zlib_compression_seen)
390 zlib_compression_level = level;
391 return 0;
394 if (!strcmp(var, "core.packedgitwindowsize")) {
395 int pgsz_x2 = getpagesize() * 2;
396 packed_git_window_size = git_config_int(var, value);
398 /* This value must be multiple of (pagesize * 2) */
399 packed_git_window_size /= pgsz_x2;
400 if (packed_git_window_size < 1)
401 packed_git_window_size = 1;
402 packed_git_window_size *= pgsz_x2;
403 return 0;
406 if (!strcmp(var, "core.packedgitlimit")) {
407 packed_git_limit = git_config_int(var, value);
408 return 0;
411 if (!strcmp(var, "core.deltabasecachelimit")) {
412 delta_base_cache_limit = git_config_int(var, value);
413 return 0;
416 if (!strcmp(var, "core.autocrlf")) {
417 if (value && !strcasecmp(value, "input")) {
418 auto_crlf = -1;
419 return 0;
421 auto_crlf = git_config_bool(var, value);
422 return 0;
425 if (!strcmp(var, "core.safecrlf")) {
426 if (value && !strcasecmp(value, "warn")) {
427 safe_crlf = SAFE_CRLF_WARN;
428 return 0;
430 safe_crlf = git_config_bool(var, value);
431 return 0;
434 if (!strcmp(var, "user.name")) {
435 if (!value)
436 return config_error_nonbool(var);
437 strlcpy(git_default_name, value, sizeof(git_default_name));
438 return 0;
441 if (!strcmp(var, "user.email")) {
442 if (!value)
443 return config_error_nonbool(var);
444 strlcpy(git_default_email, value, sizeof(git_default_email));
445 return 0;
448 if (!strcmp(var, "i18n.commitencoding"))
449 return git_config_string(&git_commit_encoding, var, value);
451 if (!strcmp(var, "i18n.logoutputencoding"))
452 return git_config_string(&git_log_output_encoding, var, value);
454 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
455 pager_use_color = git_config_bool(var,value);
456 return 0;
459 if (!strcmp(var, "core.pager"))
460 return git_config_string(&pager_program, var, value);
462 if (!strcmp(var, "core.editor"))
463 return git_config_string(&editor_program, var, value);
465 if (!strcmp(var, "core.excludesfile"))
466 return git_config_string(&excludes_file, var, value);
468 if (!strcmp(var, "core.whitespace")) {
469 if (!value)
470 return config_error_nonbool(var);
471 whitespace_rule_cfg = parse_whitespace_rule(value);
472 return 0;
474 if (!strcmp(var, "branch.autosetupmerge")) {
475 if (value && !strcasecmp(value, "always")) {
476 git_branch_track = BRANCH_TRACK_ALWAYS;
477 return 0;
479 git_branch_track = git_config_bool(var, value);
480 return 0;
483 /* Add other config variables here and to Documentation/config.txt. */
484 return 0;
487 int git_config_from_file(config_fn_t fn, const char *filename)
489 int ret;
490 FILE *f = fopen(filename, "r");
492 ret = -1;
493 if (f) {
494 config_file = f;
495 config_file_name = filename;
496 config_linenr = 1;
497 config_file_eof = 0;
498 ret = git_parse_file(fn);
499 fclose(f);
500 config_file_name = NULL;
502 return ret;
505 const char *git_etc_gitconfig(void)
507 static const char *system_wide;
508 if (!system_wide) {
509 system_wide = ETC_GITCONFIG;
510 if (!is_absolute_path(system_wide)) {
511 /* interpret path relative to exec-dir */
512 struct strbuf d = STRBUF_INIT;
513 strbuf_addf(&d, "%s/%s", git_exec_path(), system_wide);
514 system_wide = strbuf_detach(&d, NULL);
517 return system_wide;
520 int git_env_bool(const char *k, int def)
522 const char *v = getenv(k);
523 return v ? git_config_bool(k, v) : def;
526 int git_config_system(void)
528 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
531 int git_config_global(void)
533 return !git_env_bool("GIT_CONFIG_NOGLOBAL", 0);
536 int git_config(config_fn_t fn)
538 int ret = 0;
539 char *repo_config = NULL;
540 const char *home = NULL, *filename;
542 /* $GIT_CONFIG makes git read _only_ the given config file,
543 * $GIT_CONFIG_LOCAL will make it process it in addition to the
544 * global config file, the same way it would the per-repository
545 * config file otherwise. */
546 filename = getenv(CONFIG_ENVIRONMENT);
547 if (!filename) {
548 if (git_config_system() && !access(git_etc_gitconfig(), R_OK))
549 ret += git_config_from_file(fn, git_etc_gitconfig());
550 home = getenv("HOME");
551 filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
552 if (!filename)
553 filename = repo_config = xstrdup(git_path("config"));
556 if (git_config_global() && home) {
557 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
558 if (!access(user_config, R_OK))
559 ret = git_config_from_file(fn, user_config);
560 free(user_config);
563 ret += git_config_from_file(fn, filename);
564 free(repo_config);
565 return ret;
569 * Find all the stuff for git_config_set() below.
572 #define MAX_MATCHES 512
574 static struct {
575 int baselen;
576 char* key;
577 int do_not_match;
578 enum {
579 VALUE_NONE,
580 VALUE_REGEX,
581 VALUE_STRING,
582 } value_type;
583 union {
584 regex_t* regex;
585 const char *string;
586 } value;
587 int multi_replace;
588 size_t offset[MAX_MATCHES];
589 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
590 int seen;
591 } store;
593 static int matches(const char* key, const char* value)
595 if (strcmp(key, store.key))
596 return 0;
597 switch(store.value_type) {
598 case VALUE_NONE:
599 return 1;
600 case VALUE_REGEX:
601 return store.do_not_match ^
602 !regexec(store.value.regex, value, 0, NULL, 0);
603 case VALUE_STRING:
604 return store.do_not_match ^
605 !strcmp(value, store.value.string);
607 die("bug in config.c:matches");
610 static int store_aux(const char* key, const char* value)
612 const char *ep;
613 size_t section_len;
615 switch (store.state) {
616 case KEY_SEEN:
617 if (matches(key, value)) {
618 if (store.seen == 1 && store.multi_replace == 0) {
619 fprintf(stderr,
620 "Warning: %s has multiple values\n",
621 key);
622 } else if (store.seen >= MAX_MATCHES) {
623 fprintf(stderr, "Too many matches\n");
624 return 1;
627 store.offset[store.seen] = ftell(config_file);
628 store.seen++;
630 break;
631 case SECTION_SEEN:
633 * What we are looking for is in store.key (both
634 * section and var), and its section part is baselen
635 * long. We found key (again, both section and var).
636 * We would want to know if this key is in the same
637 * section as what we are looking for. We already
638 * know we are in the same section as what should
639 * hold store.key.
641 ep = strrchr(key, '.');
642 section_len = ep - key;
644 if ((section_len != store.baselen) ||
645 memcmp(key, store.key, section_len+1)) {
646 store.state = SECTION_END_SEEN;
647 break;
651 * Do not increment matches: this is no match, but we
652 * just made sure we are in the desired section.
654 store.offset[store.seen] = ftell(config_file);
655 /* fallthru */
656 case SECTION_END_SEEN:
657 case START:
658 if (matches(key, value)) {
659 store.offset[store.seen] = ftell(config_file);
660 store.state = KEY_SEEN;
661 store.seen++;
662 } else {
663 if (strrchr(key, '.') - key == store.baselen &&
664 !strncmp(key, store.key, store.baselen)) {
665 store.state = SECTION_SEEN;
666 store.offset[store.seen] = ftell(config_file);
670 return 0;
673 static int write_error(void)
675 fprintf(stderr, "Failed to write new configuration file\n");
677 /* Same error code as "failed to rename". */
678 return 4;
681 static int store_write_section(int fd, const char* key)
683 const char *dot;
684 int i, success;
685 struct strbuf sb;
687 strbuf_init(&sb, 0);
688 dot = memchr(key, '.', store.baselen);
689 if (dot) {
690 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
691 for (i = dot - key + 1; i < store.baselen; i++) {
692 if (key[i] == '"')
693 strbuf_addch(&sb, '\\');
694 strbuf_addch(&sb, key[i]);
696 strbuf_addstr(&sb, "\"]\n");
697 } else {
698 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
701 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
702 strbuf_release(&sb);
704 return success;
707 static int store_write_pair(int fd, const char* key, const char* value)
709 int i, success;
710 int length = strlen(key + store.baselen + 1);
711 const char *quote = "";
712 struct strbuf sb;
715 * Check to see if the value needs to be surrounded with a dq pair.
716 * Note that problematic characters are always backslash-quoted; this
717 * check is about not losing leading or trailing SP and strings that
718 * follow beginning-of-comment characters (i.e. ';' and '#') by the
719 * configuration parser.
721 if (value[0] == ' ')
722 quote = "\"";
723 for (i = 0; value[i]; i++)
724 if (value[i] == ';' || value[i] == '#')
725 quote = "\"";
726 if (i && value[i - 1] == ' ')
727 quote = "\"";
729 strbuf_init(&sb, 0);
730 strbuf_addf(&sb, "\t%.*s = %s",
731 length, key + store.baselen + 1, quote);
733 for (i = 0; value[i]; i++)
734 switch (value[i]) {
735 case '\n':
736 strbuf_addstr(&sb, "\\n");
737 break;
738 case '\t':
739 strbuf_addstr(&sb, "\\t");
740 break;
741 case '"':
742 case '\\':
743 strbuf_addch(&sb, '\\');
744 default:
745 strbuf_addch(&sb, value[i]);
746 break;
748 strbuf_addf(&sb, "%s\n", quote);
750 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
751 strbuf_release(&sb);
753 return success;
756 static ssize_t find_beginning_of_line(const char* contents, size_t size,
757 size_t offset_, int* found_bracket)
759 size_t equal_offset = size, bracket_offset = size;
760 ssize_t offset;
762 contline:
763 for (offset = offset_-2; offset > 0
764 && contents[offset] != '\n'; offset--)
765 switch (contents[offset]) {
766 case '=': equal_offset = offset; break;
767 case ']': bracket_offset = offset; break;
769 if (offset > 0 && contents[offset-1] == '\\') {
770 offset_ = offset;
771 goto contline;
773 if (bracket_offset < equal_offset) {
774 *found_bracket = 1;
775 offset = bracket_offset+1;
776 } else
777 offset++;
779 return offset;
782 int git_config_set(const char* key, const char* value)
784 return git_config_set_multivar(key, value, NULL, 0, 0);
788 * If value==NULL, unset in (remove from) config,
789 * if value_match!=NULL, disregard key/value pairs where value does not match.
790 * if multi_replace==0, nothing, or only one matching key/value is replaced,
791 * else all matching key/values (regardless how many) are removed,
792 * before the new pair is written.
794 * Returns 0 on success.
796 * This function does this:
798 * - it locks the config file by creating ".git/config.lock"
800 * - it then parses the config using store_aux() as validator to find
801 * the position on the key/value pair to replace. If it is to be unset,
802 * it must be found exactly once.
804 * - the config file is mmap()ed and the part before the match (if any) is
805 * written to the lock file, then the changed part and the rest.
807 * - the config file is removed and the lock file rename()d to it.
810 int git_config_set_multivar(const char* key, const char* value,
811 const char* value_match, int literal_match, int multi_replace)
813 int i, dot;
814 int fd = -1, in_fd;
815 int ret;
816 char* config_filename;
817 struct lock_file *lock = NULL;
818 const char* last_dot = strrchr(key, '.');
820 config_filename = getenv(CONFIG_ENVIRONMENT);
821 if (!config_filename) {
822 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
823 if (!config_filename)
824 config_filename = git_path("config");
826 config_filename = xstrdup(config_filename);
829 * Since "key" actually contains the section name and the real
830 * key name separated by a dot, we have to know where the dot is.
833 if (last_dot == NULL) {
834 fprintf(stderr, "key does not contain a section: %s\n", key);
835 ret = 2;
836 goto out_free;
838 store.baselen = last_dot - key;
840 store.multi_replace = multi_replace;
843 * Validate the key and while at it, lower case it for matching.
845 store.key = xmalloc(strlen(key) + 1);
846 dot = 0;
847 for (i = 0; key[i]; i++) {
848 unsigned char c = key[i];
849 if (c == '.')
850 dot = 1;
851 /* Leave the extended basename untouched.. */
852 if (!dot || i > store.baselen) {
853 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
854 fprintf(stderr, "invalid key: %s\n", key);
855 free(store.key);
856 ret = 1;
857 goto out_free;
859 c = tolower(c);
860 } else if (c == '\n') {
861 fprintf(stderr, "invalid key (newline): %s\n", key);
862 free(store.key);
863 ret = 1;
864 goto out_free;
866 store.key[i] = c;
868 store.key[i] = 0;
871 * The lock serves a purpose in addition to locking: the new
872 * contents of .git/config will be written into it.
874 lock = xcalloc(sizeof(struct lock_file), 1);
875 fd = hold_lock_file_for_update(lock, config_filename, 0);
876 if (fd < 0) {
877 fprintf(stderr, "could not lock config file\n");
878 free(store.key);
879 ret = -1;
880 goto out_free;
884 * If .git/config does not exist yet, write a minimal version.
886 in_fd = open(config_filename, O_RDONLY);
887 if ( in_fd < 0 ) {
888 free(store.key);
890 if ( ENOENT != errno ) {
891 error("opening %s: %s", config_filename,
892 strerror(errno));
893 ret = 3; /* same as "invalid config file" */
894 goto out_free;
896 /* if nothing to unset, error out */
897 if (value == NULL) {
898 ret = 5;
899 goto out_free;
902 store.key = (char*)key;
903 if (!store_write_section(fd, key) ||
904 !store_write_pair(fd, key, value))
905 goto write_err_out;
906 } else {
907 struct stat st;
908 char* contents;
909 size_t contents_sz, copy_begin, copy_end;
910 int i, new_line = 0;
912 if (value_match == NULL)
913 store.value_type = VALUE_NONE;
914 else if(literal_match) {
915 store.value_type = VALUE_STRING;
916 store.do_not_match = 0;
917 store.value.string = value_match;
919 else {
920 store.value_type = VALUE_REGEX;
921 if (value_match[0] == '!') {
922 store.do_not_match = 1;
923 value_match++;
924 } else
925 store.do_not_match = 0;
927 store.value.regex = (regex_t*)xmalloc(sizeof(regex_t));
928 if (regcomp(store.value.regex, value_match,
929 REG_EXTENDED)) {
930 fprintf(stderr, "Invalid pattern: %s\n",
931 value_match);
932 free(store.value.regex);
933 ret = 6;
934 goto out_free;
938 store.offset[0] = 0;
939 store.state = START;
940 store.seen = 0;
943 * After this, store.offset will contain the *end* offset
944 * of the last match, or remain at 0 if no match was found.
945 * As a side effect, we make sure to transform only a valid
946 * existing config file.
948 if (git_config_from_file(store_aux, config_filename)) {
949 fprintf(stderr, "invalid config file\n");
950 free(store.key);
951 if (store.value_type == VALUE_REGEX) {
952 regfree(store.value.regex);
953 free(store.value.regex);
955 ret = 3;
956 goto out_free;
959 free(store.key);
960 if (store.value_type == VALUE_REGEX) {
961 regfree(store.value.regex);
962 free(store.value.regex);
965 /* if nothing to unset, or too many matches, error out */
966 if ((store.seen == 0 && value == NULL) ||
967 (store.seen > 1 && multi_replace == 0)) {
968 ret = 5;
969 goto out_free;
972 fstat(in_fd, &st);
973 contents_sz = xsize_t(st.st_size);
974 contents = xmmap(NULL, contents_sz, PROT_READ,
975 MAP_PRIVATE, in_fd, 0);
976 close(in_fd);
978 if (store.seen == 0)
979 store.seen = 1;
981 for (i = 0, copy_begin = 0; i < store.seen; i++) {
982 if (store.offset[i] == 0) {
983 store.offset[i] = copy_end = contents_sz;
984 } else if (store.state != KEY_SEEN) {
985 copy_end = store.offset[i];
986 } else
987 copy_end = find_beginning_of_line(
988 contents, contents_sz,
989 store.offset[i]-2, &new_line);
991 if (copy_end > 0 && contents[copy_end-1] != '\n')
992 new_line = 1;
994 /* write the first part of the config */
995 if (copy_end > copy_begin) {
996 if (write_in_full(fd, contents + copy_begin,
997 copy_end - copy_begin) <
998 copy_end - copy_begin)
999 goto write_err_out;
1000 if (new_line &&
1001 write_in_full(fd, "\n", 1) != 1)
1002 goto write_err_out;
1004 copy_begin = store.offset[i];
1007 /* write the pair (value == NULL means unset) */
1008 if (value != NULL) {
1009 if (store.state == START) {
1010 if (!store_write_section(fd, key))
1011 goto write_err_out;
1013 if (!store_write_pair(fd, key, value))
1014 goto write_err_out;
1017 /* write the rest of the config */
1018 if (copy_begin < contents_sz)
1019 if (write_in_full(fd, contents + copy_begin,
1020 contents_sz - copy_begin) <
1021 contents_sz - copy_begin)
1022 goto write_err_out;
1024 munmap(contents, contents_sz);
1027 if (commit_lock_file(lock) < 0) {
1028 fprintf(stderr, "Cannot commit config file!\n");
1029 ret = 4;
1030 goto out_free;
1034 * lock is committed, so don't try to roll it back below.
1035 * NOTE: Since lockfile.c keeps a linked list of all created
1036 * lock_file structures, it isn't safe to free(lock). It's
1037 * better to just leave it hanging around.
1039 lock = NULL;
1040 ret = 0;
1042 out_free:
1043 if (lock)
1044 rollback_lock_file(lock);
1045 free(config_filename);
1046 return ret;
1048 write_err_out:
1049 ret = write_error();
1050 goto out_free;
1054 static int section_name_match (const char *buf, const char *name)
1056 int i = 0, j = 0, dot = 0;
1057 for (; buf[i] && buf[i] != ']'; i++) {
1058 if (!dot && isspace(buf[i])) {
1059 dot = 1;
1060 if (name[j++] != '.')
1061 break;
1062 for (i++; isspace(buf[i]); i++)
1063 ; /* do nothing */
1064 if (buf[i] != '"')
1065 break;
1066 continue;
1068 if (buf[i] == '\\' && dot)
1069 i++;
1070 else if (buf[i] == '"' && dot) {
1071 for (i++; isspace(buf[i]); i++)
1072 ; /* do_nothing */
1073 break;
1075 if (buf[i] != name[j++])
1076 break;
1078 return (buf[i] == ']' && name[j] == 0);
1081 /* if new_name == NULL, the section is removed instead */
1082 int git_config_rename_section(const char *old_name, const char *new_name)
1084 int ret = 0, remove = 0;
1085 char *config_filename;
1086 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1087 int out_fd;
1088 char buf[1024];
1090 config_filename = getenv(CONFIG_ENVIRONMENT);
1091 if (!config_filename) {
1092 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
1093 if (!config_filename)
1094 config_filename = git_path("config");
1096 config_filename = xstrdup(config_filename);
1097 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1098 if (out_fd < 0) {
1099 ret = error("Could not lock config file!");
1100 goto out;
1103 if (!(config_file = fopen(config_filename, "rb"))) {
1104 /* no config file means nothing to rename, no error */
1105 goto unlock_and_out;
1108 while (fgets(buf, sizeof(buf), config_file)) {
1109 int i;
1110 int length;
1111 for (i = 0; buf[i] && isspace(buf[i]); i++)
1112 ; /* do nothing */
1113 if (buf[i] == '[') {
1114 /* it's a section */
1115 if (section_name_match (&buf[i+1], old_name)) {
1116 ret++;
1117 if (new_name == NULL) {
1118 remove = 1;
1119 continue;
1121 store.baselen = strlen(new_name);
1122 if (!store_write_section(out_fd, new_name)) {
1123 ret = write_error();
1124 goto out;
1126 continue;
1128 remove = 0;
1130 if (remove)
1131 continue;
1132 length = strlen(buf);
1133 if (write_in_full(out_fd, buf, length) != length) {
1134 ret = write_error();
1135 goto out;
1138 fclose(config_file);
1139 unlock_and_out:
1140 if (commit_lock_file(lock) < 0)
1141 ret = error("Cannot commit config file!");
1142 out:
1143 free(config_filename);
1144 return ret;
1148 * Call this to report error for your variable that should not
1149 * get a boolean value (i.e. "[my] var" means "true").
1151 int config_error_nonbool(const char *var)
1153 return error("Missing value for '%s'", var);