config.c: mark die_bad_number as NORETURN
[git/git-svn.git] / config.c
blob67e62ac8e5b88bdbb26ba178ceae3653b0aa25b8
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"
10 #include "strbuf.h"
11 #include "quote.h"
13 struct config_source {
14 struct config_source *prev;
15 union {
16 FILE *file;
17 struct config_buf {
18 const char *buf;
19 size_t len;
20 size_t pos;
21 } buf;
22 } u;
23 const char *name;
24 int die_on_error;
25 int linenr;
26 int eof;
27 struct strbuf value;
28 struct strbuf var;
30 int (*do_fgetc)(struct config_source *c);
31 int (*do_ungetc)(int c, struct config_source *conf);
32 long (*do_ftell)(struct config_source *c);
35 static struct config_source *cf;
37 static int zlib_compression_seen;
39 static int config_file_fgetc(struct config_source *conf)
41 return fgetc(conf->u.file);
44 static int config_file_ungetc(int c, struct config_source *conf)
46 return ungetc(c, conf->u.file);
49 static long config_file_ftell(struct config_source *conf)
51 return ftell(conf->u.file);
55 static int config_buf_fgetc(struct config_source *conf)
57 if (conf->u.buf.pos < conf->u.buf.len)
58 return conf->u.buf.buf[conf->u.buf.pos++];
60 return EOF;
63 static int config_buf_ungetc(int c, struct config_source *conf)
65 if (conf->u.buf.pos > 0)
66 return conf->u.buf.buf[--conf->u.buf.pos];
68 return EOF;
71 static long config_buf_ftell(struct config_source *conf)
73 return conf->u.buf.pos;
76 #define MAX_INCLUDE_DEPTH 10
77 static const char include_depth_advice[] =
78 "exceeded maximum include depth (%d) while including\n"
79 " %s\n"
80 "from\n"
81 " %s\n"
82 "Do you have circular includes?";
83 static int handle_path_include(const char *path, struct config_include_data *inc)
85 int ret = 0;
86 struct strbuf buf = STRBUF_INIT;
87 char *expanded = expand_user_path(path);
89 if (!expanded)
90 return error("Could not expand include path '%s'", path);
91 path = expanded;
94 * Use an absolute path as-is, but interpret relative paths
95 * based on the including config file.
97 if (!is_absolute_path(path)) {
98 char *slash;
100 if (!cf || !cf->name)
101 return error("relative config includes must come from files");
103 slash = find_last_dir_sep(cf->name);
104 if (slash)
105 strbuf_add(&buf, cf->name, slash - cf->name + 1);
106 strbuf_addstr(&buf, path);
107 path = buf.buf;
110 if (!access_or_die(path, R_OK, 0)) {
111 if (++inc->depth > MAX_INCLUDE_DEPTH)
112 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
113 cf && cf->name ? cf->name : "the command line");
114 ret = git_config_from_file(git_config_include, path, inc);
115 inc->depth--;
117 strbuf_release(&buf);
118 free(expanded);
119 return ret;
122 int git_config_include(const char *var, const char *value, void *data)
124 struct config_include_data *inc = data;
125 const char *type;
126 int ret;
129 * Pass along all values, including "include" directives; this makes it
130 * possible to query information on the includes themselves.
132 ret = inc->fn(var, value, inc->data);
133 if (ret < 0)
134 return ret;
136 type = skip_prefix(var, "include.");
137 if (!type)
138 return ret;
140 if (!strcmp(type, "path"))
141 ret = handle_path_include(value, inc);
142 return ret;
145 static void lowercase(char *p)
147 for (; *p; p++)
148 *p = tolower(*p);
151 void git_config_push_parameter(const char *text)
153 struct strbuf env = STRBUF_INIT;
154 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
155 if (old) {
156 strbuf_addstr(&env, old);
157 strbuf_addch(&env, ' ');
159 sq_quote_buf(&env, text);
160 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
161 strbuf_release(&env);
164 int git_config_parse_parameter(const char *text,
165 config_fn_t fn, void *data)
167 struct strbuf **pair;
168 pair = strbuf_split_str(text, '=', 2);
169 if (!pair[0])
170 return error("bogus config parameter: %s", text);
171 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
172 strbuf_setlen(pair[0], pair[0]->len - 1);
173 strbuf_trim(pair[0]);
174 if (!pair[0]->len) {
175 strbuf_list_free(pair);
176 return error("bogus config parameter: %s", text);
178 lowercase(pair[0]->buf);
179 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
180 strbuf_list_free(pair);
181 return -1;
183 strbuf_list_free(pair);
184 return 0;
187 int git_config_from_parameters(config_fn_t fn, void *data)
189 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
190 char *envw;
191 const char **argv = NULL;
192 int nr = 0, alloc = 0;
193 int i;
195 if (!env)
196 return 0;
197 /* sq_dequote will write over it */
198 envw = xstrdup(env);
200 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
201 free(envw);
202 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
205 for (i = 0; i < nr; i++) {
206 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
207 free(argv);
208 free(envw);
209 return -1;
213 free(argv);
214 free(envw);
215 return nr > 0;
218 static int get_next_char(void)
220 int c = cf->do_fgetc(cf);
222 if (c == '\r') {
223 /* DOS like systems */
224 c = cf->do_fgetc(cf);
225 if (c != '\n') {
226 cf->do_ungetc(c, cf);
227 c = '\r';
230 if (c == '\n')
231 cf->linenr++;
232 if (c == EOF) {
233 cf->eof = 1;
234 c = '\n';
236 return c;
239 static char *parse_value(void)
241 int quote = 0, comment = 0, space = 0;
243 strbuf_reset(&cf->value);
244 for (;;) {
245 int c = get_next_char();
246 if (c == '\n') {
247 if (quote) {
248 cf->linenr--;
249 return NULL;
251 return cf->value.buf;
253 if (comment)
254 continue;
255 if (isspace(c) && !quote) {
256 if (cf->value.len)
257 space++;
258 continue;
260 if (!quote) {
261 if (c == ';' || c == '#') {
262 comment = 1;
263 continue;
266 for (; space; space--)
267 strbuf_addch(&cf->value, ' ');
268 if (c == '\\') {
269 c = get_next_char();
270 switch (c) {
271 case '\n':
272 continue;
273 case 't':
274 c = '\t';
275 break;
276 case 'b':
277 c = '\b';
278 break;
279 case 'n':
280 c = '\n';
281 break;
282 /* Some characters escape as themselves */
283 case '\\': case '"':
284 break;
285 /* Reject unknown escape sequences */
286 default:
287 return NULL;
289 strbuf_addch(&cf->value, c);
290 continue;
292 if (c == '"') {
293 quote = 1-quote;
294 continue;
296 strbuf_addch(&cf->value, c);
300 static inline int iskeychar(int c)
302 return isalnum(c) || c == '-';
305 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
307 int c;
308 char *value;
310 /* Get the full name */
311 for (;;) {
312 c = get_next_char();
313 if (cf->eof)
314 break;
315 if (!iskeychar(c))
316 break;
317 strbuf_addch(name, tolower(c));
320 while (c == ' ' || c == '\t')
321 c = get_next_char();
323 value = NULL;
324 if (c != '\n') {
325 if (c != '=')
326 return -1;
327 value = parse_value();
328 if (!value)
329 return -1;
331 return fn(name->buf, value, data);
334 static int get_extended_base_var(struct strbuf *name, int c)
336 do {
337 if (c == '\n')
338 goto error_incomplete_line;
339 c = get_next_char();
340 } while (isspace(c));
342 /* We require the format to be '[base "extension"]' */
343 if (c != '"')
344 return -1;
345 strbuf_addch(name, '.');
347 for (;;) {
348 int c = get_next_char();
349 if (c == '\n')
350 goto error_incomplete_line;
351 if (c == '"')
352 break;
353 if (c == '\\') {
354 c = get_next_char();
355 if (c == '\n')
356 goto error_incomplete_line;
358 strbuf_addch(name, c);
361 /* Final ']' */
362 if (get_next_char() != ']')
363 return -1;
364 return 0;
365 error_incomplete_line:
366 cf->linenr--;
367 return -1;
370 static int get_base_var(struct strbuf *name)
372 for (;;) {
373 int c = get_next_char();
374 if (cf->eof)
375 return -1;
376 if (c == ']')
377 return 0;
378 if (isspace(c))
379 return get_extended_base_var(name, c);
380 if (!iskeychar(c) && c != '.')
381 return -1;
382 strbuf_addch(name, tolower(c));
386 static int git_parse_source(config_fn_t fn, void *data)
388 int comment = 0;
389 int baselen = 0;
390 struct strbuf *var = &cf->var;
392 /* U+FEFF Byte Order Mark in UTF8 */
393 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
394 const unsigned char *bomptr = utf8_bom;
396 for (;;) {
397 int c = get_next_char();
398 if (bomptr && *bomptr) {
399 /* We are at the file beginning; skip UTF8-encoded BOM
400 * if present. Sane editors won't put this in on their
401 * own, but e.g. Windows Notepad will do it happily. */
402 if ((unsigned char) c == *bomptr) {
403 bomptr++;
404 continue;
405 } else {
406 /* Do not tolerate partial BOM. */
407 if (bomptr != utf8_bom)
408 break;
409 /* No BOM at file beginning. Cool. */
410 bomptr = NULL;
413 if (c == '\n') {
414 if (cf->eof)
415 return 0;
416 comment = 0;
417 continue;
419 if (comment || isspace(c))
420 continue;
421 if (c == '#' || c == ';') {
422 comment = 1;
423 continue;
425 if (c == '[') {
426 /* Reset prior to determining a new stem */
427 strbuf_reset(var);
428 if (get_base_var(var) < 0 || var->len < 1)
429 break;
430 strbuf_addch(var, '.');
431 baselen = var->len;
432 continue;
434 if (!isalpha(c))
435 break;
437 * Truncate the var name back to the section header
438 * stem prior to grabbing the suffix part of the name
439 * and the value.
441 strbuf_setlen(var, baselen);
442 strbuf_addch(var, tolower(c));
443 if (get_value(fn, data, var) < 0)
444 break;
446 if (cf->die_on_error)
447 die("bad config file line %d in %s", cf->linenr, cf->name);
448 else
449 return error("bad config file line %d in %s", cf->linenr, cf->name);
452 static int parse_unit_factor(const char *end, uintmax_t *val)
454 if (!*end)
455 return 1;
456 else if (!strcasecmp(end, "k")) {
457 *val *= 1024;
458 return 1;
460 else if (!strcasecmp(end, "m")) {
461 *val *= 1024 * 1024;
462 return 1;
464 else if (!strcasecmp(end, "g")) {
465 *val *= 1024 * 1024 * 1024;
466 return 1;
468 return 0;
471 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
473 if (value && *value) {
474 char *end;
475 intmax_t val;
476 uintmax_t uval;
477 uintmax_t factor = 1;
479 errno = 0;
480 val = strtoimax(value, &end, 0);
481 if (errno == ERANGE)
482 return 0;
483 if (!parse_unit_factor(end, &factor)) {
484 errno = EINVAL;
485 return 0;
487 uval = abs(val);
488 uval *= factor;
489 if (uval > max || abs(val) > uval) {
490 errno = ERANGE;
491 return 0;
493 val *= factor;
494 *ret = val;
495 return 1;
497 errno = EINVAL;
498 return 0;
501 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
503 if (value && *value) {
504 char *end;
505 uintmax_t val;
506 uintmax_t oldval;
508 errno = 0;
509 val = strtoumax(value, &end, 0);
510 if (errno == ERANGE)
511 return 0;
512 oldval = val;
513 if (!parse_unit_factor(end, &val)) {
514 errno = EINVAL;
515 return 0;
517 if (val > max || oldval > val) {
518 errno = ERANGE;
519 return 0;
521 *ret = val;
522 return 1;
524 errno = EINVAL;
525 return 0;
528 static int git_parse_int(const char *value, int *ret)
530 intmax_t tmp;
531 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
532 return 0;
533 *ret = tmp;
534 return 1;
537 static int git_parse_int64(const char *value, int64_t *ret)
539 intmax_t tmp;
540 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
541 return 0;
542 *ret = tmp;
543 return 1;
546 int git_parse_ulong(const char *value, unsigned long *ret)
548 uintmax_t tmp;
549 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
550 return 0;
551 *ret = tmp;
552 return 1;
555 NORETURN
556 static void die_bad_number(const char *name, const char *value)
558 const char *reason = errno == ERANGE ?
559 "out of range" :
560 "invalid unit";
561 if (!value)
562 value = "";
564 if (cf && cf->name)
565 die("bad numeric config value '%s' for '%s' in %s: %s",
566 value, name, cf->name, reason);
567 die("bad numeric config value '%s' for '%s': %s", value, name, reason);
570 int git_config_int(const char *name, const char *value)
572 int ret;
573 if (!git_parse_int(value, &ret))
574 die_bad_number(name, value);
575 return ret;
578 int64_t git_config_int64(const char *name, const char *value)
580 int64_t ret;
581 if (!git_parse_int64(value, &ret))
582 die_bad_number(name, value);
583 return ret;
586 unsigned long git_config_ulong(const char *name, const char *value)
588 unsigned long ret;
589 if (!git_parse_ulong(value, &ret))
590 die_bad_number(name, value);
591 return ret;
594 static int git_config_maybe_bool_text(const char *name, const char *value)
596 if (!value)
597 return 1;
598 if (!*value)
599 return 0;
600 if (!strcasecmp(value, "true")
601 || !strcasecmp(value, "yes")
602 || !strcasecmp(value, "on"))
603 return 1;
604 if (!strcasecmp(value, "false")
605 || !strcasecmp(value, "no")
606 || !strcasecmp(value, "off"))
607 return 0;
608 return -1;
611 int git_config_maybe_bool(const char *name, const char *value)
613 int v = git_config_maybe_bool_text(name, value);
614 if (0 <= v)
615 return v;
616 if (git_parse_int(value, &v))
617 return !!v;
618 return -1;
621 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
623 int v = git_config_maybe_bool_text(name, value);
624 if (0 <= v) {
625 *is_bool = 1;
626 return v;
628 *is_bool = 0;
629 return git_config_int(name, value);
632 int git_config_bool(const char *name, const char *value)
634 int discard;
635 return !!git_config_bool_or_int(name, value, &discard);
638 int git_config_string(const char **dest, const char *var, const char *value)
640 if (!value)
641 return config_error_nonbool(var);
642 *dest = xstrdup(value);
643 return 0;
646 int git_config_pathname(const char **dest, const char *var, const char *value)
648 if (!value)
649 return config_error_nonbool(var);
650 *dest = expand_user_path(value);
651 if (!*dest)
652 die("Failed to expand user dir in: '%s'", value);
653 return 0;
656 static int git_default_core_config(const char *var, const char *value)
658 /* This needs a better name */
659 if (!strcmp(var, "core.filemode")) {
660 trust_executable_bit = git_config_bool(var, value);
661 return 0;
663 if (!strcmp(var, "core.trustctime")) {
664 trust_ctime = git_config_bool(var, value);
665 return 0;
667 if (!strcmp(var, "core.statinfo") ||
668 !strcmp(var, "core.checkstat")) {
670 * NEEDSWORK: statinfo was a typo in v1.8.2 that has
671 * never been advertised. we will remove it at Git
672 * 2.0 boundary.
674 if (!strcmp(var, "core.statinfo")) {
675 static int warned;
676 if (!warned++) {
677 warning("'core.statinfo' will be removed in Git 2.0; "
678 "use 'core.checkstat' instead.");
681 if (!strcasecmp(value, "default"))
682 check_stat = 1;
683 else if (!strcasecmp(value, "minimal"))
684 check_stat = 0;
687 if (!strcmp(var, "core.quotepath")) {
688 quote_path_fully = git_config_bool(var, value);
689 return 0;
692 if (!strcmp(var, "core.symlinks")) {
693 has_symlinks = git_config_bool(var, value);
694 return 0;
697 if (!strcmp(var, "core.ignorecase")) {
698 ignore_case = git_config_bool(var, value);
699 return 0;
702 if (!strcmp(var, "core.attributesfile"))
703 return git_config_pathname(&git_attributes_file, var, value);
705 if (!strcmp(var, "core.bare")) {
706 is_bare_repository_cfg = git_config_bool(var, value);
707 return 0;
710 if (!strcmp(var, "core.ignorestat")) {
711 assume_unchanged = git_config_bool(var, value);
712 return 0;
715 if (!strcmp(var, "core.prefersymlinkrefs")) {
716 prefer_symlink_refs = git_config_bool(var, value);
717 return 0;
720 if (!strcmp(var, "core.logallrefupdates")) {
721 log_all_ref_updates = git_config_bool(var, value);
722 return 0;
725 if (!strcmp(var, "core.warnambiguousrefs")) {
726 warn_ambiguous_refs = git_config_bool(var, value);
727 return 0;
730 if (!strcmp(var, "core.abbrev")) {
731 int abbrev = git_config_int(var, value);
732 if (abbrev < minimum_abbrev || abbrev > 40)
733 return -1;
734 default_abbrev = abbrev;
735 return 0;
738 if (!strcmp(var, "core.loosecompression")) {
739 int level = git_config_int(var, value);
740 if (level == -1)
741 level = Z_DEFAULT_COMPRESSION;
742 else if (level < 0 || level > Z_BEST_COMPRESSION)
743 die("bad zlib compression level %d", level);
744 zlib_compression_level = level;
745 zlib_compression_seen = 1;
746 return 0;
749 if (!strcmp(var, "core.compression")) {
750 int level = git_config_int(var, value);
751 if (level == -1)
752 level = Z_DEFAULT_COMPRESSION;
753 else if (level < 0 || level > Z_BEST_COMPRESSION)
754 die("bad zlib compression level %d", level);
755 core_compression_level = level;
756 core_compression_seen = 1;
757 if (!zlib_compression_seen)
758 zlib_compression_level = level;
759 return 0;
762 if (!strcmp(var, "core.packedgitwindowsize")) {
763 int pgsz_x2 = getpagesize() * 2;
764 packed_git_window_size = git_config_ulong(var, value);
766 /* This value must be multiple of (pagesize * 2) */
767 packed_git_window_size /= pgsz_x2;
768 if (packed_git_window_size < 1)
769 packed_git_window_size = 1;
770 packed_git_window_size *= pgsz_x2;
771 return 0;
774 if (!strcmp(var, "core.bigfilethreshold")) {
775 big_file_threshold = git_config_ulong(var, value);
776 return 0;
779 if (!strcmp(var, "core.packedgitlimit")) {
780 packed_git_limit = git_config_ulong(var, value);
781 return 0;
784 if (!strcmp(var, "core.deltabasecachelimit")) {
785 delta_base_cache_limit = git_config_ulong(var, value);
786 return 0;
789 if (!strcmp(var, "core.autocrlf")) {
790 if (value && !strcasecmp(value, "input")) {
791 if (core_eol == EOL_CRLF)
792 return error("core.autocrlf=input conflicts with core.eol=crlf");
793 auto_crlf = AUTO_CRLF_INPUT;
794 return 0;
796 auto_crlf = git_config_bool(var, value);
797 return 0;
800 if (!strcmp(var, "core.safecrlf")) {
801 if (value && !strcasecmp(value, "warn")) {
802 safe_crlf = SAFE_CRLF_WARN;
803 return 0;
805 safe_crlf = git_config_bool(var, value);
806 return 0;
809 if (!strcmp(var, "core.eol")) {
810 if (value && !strcasecmp(value, "lf"))
811 core_eol = EOL_LF;
812 else if (value && !strcasecmp(value, "crlf"))
813 core_eol = EOL_CRLF;
814 else if (value && !strcasecmp(value, "native"))
815 core_eol = EOL_NATIVE;
816 else
817 core_eol = EOL_UNSET;
818 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
819 return error("core.autocrlf=input conflicts with core.eol=crlf");
820 return 0;
823 if (!strcmp(var, "core.notesref")) {
824 notes_ref_name = xstrdup(value);
825 return 0;
828 if (!strcmp(var, "core.pager"))
829 return git_config_string(&pager_program, var, value);
831 if (!strcmp(var, "core.editor"))
832 return git_config_string(&editor_program, var, value);
834 if (!strcmp(var, "core.commentchar")) {
835 const char *comment;
836 int ret = git_config_string(&comment, var, value);
837 if (!ret)
838 comment_line_char = comment[0];
839 return ret;
842 if (!strcmp(var, "core.askpass"))
843 return git_config_string(&askpass_program, var, value);
845 if (!strcmp(var, "core.excludesfile"))
846 return git_config_pathname(&excludes_file, var, value);
848 if (!strcmp(var, "core.whitespace")) {
849 if (!value)
850 return config_error_nonbool(var);
851 whitespace_rule_cfg = parse_whitespace_rule(value);
852 return 0;
855 if (!strcmp(var, "core.fsyncobjectfiles")) {
856 fsync_object_files = git_config_bool(var, value);
857 return 0;
860 if (!strcmp(var, "core.preloadindex")) {
861 core_preload_index = git_config_bool(var, value);
862 return 0;
865 if (!strcmp(var, "core.createobject")) {
866 if (!strcmp(value, "rename"))
867 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
868 else if (!strcmp(value, "link"))
869 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
870 else
871 die("Invalid mode for object creation: %s", value);
872 return 0;
875 if (!strcmp(var, "core.sparsecheckout")) {
876 core_apply_sparse_checkout = git_config_bool(var, value);
877 return 0;
880 if (!strcmp(var, "core.precomposeunicode")) {
881 precomposed_unicode = git_config_bool(var, value);
882 return 0;
885 /* Add other config variables here and to Documentation/config.txt. */
886 return 0;
889 static int git_default_i18n_config(const char *var, const char *value)
891 if (!strcmp(var, "i18n.commitencoding"))
892 return git_config_string(&git_commit_encoding, var, value);
894 if (!strcmp(var, "i18n.logoutputencoding"))
895 return git_config_string(&git_log_output_encoding, var, value);
897 /* Add other config variables here and to Documentation/config.txt. */
898 return 0;
901 static int git_default_branch_config(const char *var, const char *value)
903 if (!strcmp(var, "branch.autosetupmerge")) {
904 if (value && !strcasecmp(value, "always")) {
905 git_branch_track = BRANCH_TRACK_ALWAYS;
906 return 0;
908 git_branch_track = git_config_bool(var, value);
909 return 0;
911 if (!strcmp(var, "branch.autosetuprebase")) {
912 if (!value)
913 return config_error_nonbool(var);
914 else if (!strcmp(value, "never"))
915 autorebase = AUTOREBASE_NEVER;
916 else if (!strcmp(value, "local"))
917 autorebase = AUTOREBASE_LOCAL;
918 else if (!strcmp(value, "remote"))
919 autorebase = AUTOREBASE_REMOTE;
920 else if (!strcmp(value, "always"))
921 autorebase = AUTOREBASE_ALWAYS;
922 else
923 return error("Malformed value for %s", var);
924 return 0;
927 /* Add other config variables here and to Documentation/config.txt. */
928 return 0;
931 static int git_default_push_config(const char *var, const char *value)
933 if (!strcmp(var, "push.default")) {
934 if (!value)
935 return config_error_nonbool(var);
936 else if (!strcmp(value, "nothing"))
937 push_default = PUSH_DEFAULT_NOTHING;
938 else if (!strcmp(value, "matching"))
939 push_default = PUSH_DEFAULT_MATCHING;
940 else if (!strcmp(value, "simple"))
941 push_default = PUSH_DEFAULT_SIMPLE;
942 else if (!strcmp(value, "upstream"))
943 push_default = PUSH_DEFAULT_UPSTREAM;
944 else if (!strcmp(value, "tracking")) /* deprecated */
945 push_default = PUSH_DEFAULT_UPSTREAM;
946 else if (!strcmp(value, "current"))
947 push_default = PUSH_DEFAULT_CURRENT;
948 else {
949 error("Malformed value for %s: %s", var, value);
950 return error("Must be one of nothing, matching, simple, "
951 "upstream or current.");
953 return 0;
956 /* Add other config variables here and to Documentation/config.txt. */
957 return 0;
960 static int git_default_mailmap_config(const char *var, const char *value)
962 if (!strcmp(var, "mailmap.file"))
963 return git_config_string(&git_mailmap_file, var, value);
964 if (!strcmp(var, "mailmap.blob"))
965 return git_config_string(&git_mailmap_blob, var, value);
967 /* Add other config variables here and to Documentation/config.txt. */
968 return 0;
971 int git_default_config(const char *var, const char *value, void *dummy)
973 if (!prefixcmp(var, "core."))
974 return git_default_core_config(var, value);
976 if (!prefixcmp(var, "user."))
977 return git_ident_config(var, value, dummy);
979 if (!prefixcmp(var, "i18n."))
980 return git_default_i18n_config(var, value);
982 if (!prefixcmp(var, "branch."))
983 return git_default_branch_config(var, value);
985 if (!prefixcmp(var, "push."))
986 return git_default_push_config(var, value);
988 if (!prefixcmp(var, "mailmap."))
989 return git_default_mailmap_config(var, value);
991 if (!prefixcmp(var, "advice."))
992 return git_default_advice_config(var, value);
994 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
995 pager_use_color = git_config_bool(var,value);
996 return 0;
999 if (!strcmp(var, "pack.packsizelimit")) {
1000 pack_size_limit_cfg = git_config_ulong(var, value);
1001 return 0;
1003 /* Add other config variables here and to Documentation/config.txt. */
1004 return 0;
1008 * All source specific fields in the union, die_on_error, name and the callbacks
1009 * fgetc, ungetc, ftell of top need to be initialized before calling
1010 * this function.
1012 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1014 int ret;
1016 /* push config-file parsing state stack */
1017 top->prev = cf;
1018 top->linenr = 1;
1019 top->eof = 0;
1020 strbuf_init(&top->value, 1024);
1021 strbuf_init(&top->var, 1024);
1022 cf = top;
1024 ret = git_parse_source(fn, data);
1026 /* pop config-file parsing state stack */
1027 strbuf_release(&top->value);
1028 strbuf_release(&top->var);
1029 cf = top->prev;
1031 return ret;
1034 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1036 int ret;
1037 FILE *f = fopen(filename, "r");
1039 ret = -1;
1040 if (f) {
1041 struct config_source top;
1043 top.u.file = f;
1044 top.name = filename;
1045 top.die_on_error = 1;
1046 top.do_fgetc = config_file_fgetc;
1047 top.do_ungetc = config_file_ungetc;
1048 top.do_ftell = config_file_ftell;
1050 ret = do_config_from(&top, fn, data);
1052 fclose(f);
1054 return ret;
1057 int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1058 size_t len, void *data)
1060 struct config_source top;
1062 top.u.buf.buf = buf;
1063 top.u.buf.len = len;
1064 top.u.buf.pos = 0;
1065 top.name = name;
1066 top.die_on_error = 0;
1067 top.do_fgetc = config_buf_fgetc;
1068 top.do_ungetc = config_buf_ungetc;
1069 top.do_ftell = config_buf_ftell;
1071 return do_config_from(&top, fn, data);
1074 static int git_config_from_blob_sha1(config_fn_t fn,
1075 const char *name,
1076 const unsigned char *sha1,
1077 void *data)
1079 enum object_type type;
1080 char *buf;
1081 unsigned long size;
1082 int ret;
1084 buf = read_sha1_file(sha1, &type, &size);
1085 if (!buf)
1086 return error("unable to load config blob object '%s'", name);
1087 if (type != OBJ_BLOB) {
1088 free(buf);
1089 return error("reference '%s' does not point to a blob", name);
1092 ret = git_config_from_buf(fn, name, buf, size, data);
1093 free(buf);
1095 return ret;
1098 static int git_config_from_blob_ref(config_fn_t fn,
1099 const char *name,
1100 void *data)
1102 unsigned char sha1[20];
1104 if (get_sha1(name, sha1) < 0)
1105 return error("unable to resolve config blob '%s'", name);
1106 return git_config_from_blob_sha1(fn, name, sha1, data);
1109 const char *git_etc_gitconfig(void)
1111 static const char *system_wide;
1112 if (!system_wide)
1113 system_wide = system_path(ETC_GITCONFIG);
1114 return system_wide;
1117 int git_env_bool(const char *k, int def)
1119 const char *v = getenv(k);
1120 return v ? git_config_bool(k, v) : def;
1123 int git_config_system(void)
1125 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1128 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
1130 int ret = 0, found = 0;
1131 char *xdg_config = NULL;
1132 char *user_config = NULL;
1134 home_config_paths(&user_config, &xdg_config, "config");
1136 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
1137 ret += git_config_from_file(fn, git_etc_gitconfig(),
1138 data);
1139 found += 1;
1142 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
1143 ret += git_config_from_file(fn, xdg_config, data);
1144 found += 1;
1147 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
1148 ret += git_config_from_file(fn, user_config, data);
1149 found += 1;
1152 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
1153 ret += git_config_from_file(fn, repo_config, data);
1154 found += 1;
1157 switch (git_config_from_parameters(fn, data)) {
1158 case -1: /* error */
1159 die("unable to parse command-line config");
1160 break;
1161 case 0: /* found nothing */
1162 break;
1163 default: /* found at least one item */
1164 found++;
1165 break;
1168 free(xdg_config);
1169 free(user_config);
1170 return ret == 0 ? found : ret;
1173 int git_config_with_options(config_fn_t fn, void *data,
1174 const char *filename,
1175 const char *blob_ref,
1176 int respect_includes)
1178 char *repo_config = NULL;
1179 int ret;
1180 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1182 if (respect_includes) {
1183 inc.fn = fn;
1184 inc.data = data;
1185 fn = git_config_include;
1186 data = &inc;
1190 * If we have a specific filename, use it. Otherwise, follow the
1191 * regular lookup sequence.
1193 if (filename)
1194 return git_config_from_file(fn, filename, data);
1195 else if (blob_ref)
1196 return git_config_from_blob_ref(fn, blob_ref, data);
1198 repo_config = git_pathdup("config");
1199 ret = git_config_early(fn, data, repo_config);
1200 if (repo_config)
1201 free(repo_config);
1202 return ret;
1205 int git_config(config_fn_t fn, void *data)
1207 return git_config_with_options(fn, data, NULL, NULL, 1);
1211 * Find all the stuff for git_config_set() below.
1214 #define MAX_MATCHES 512
1216 static struct {
1217 int baselen;
1218 char *key;
1219 int do_not_match;
1220 regex_t *value_regex;
1221 int multi_replace;
1222 size_t offset[MAX_MATCHES];
1223 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1224 int seen;
1225 } store;
1227 static int matches(const char *key, const char *value)
1229 return !strcmp(key, store.key) &&
1230 (store.value_regex == NULL ||
1231 (store.do_not_match ^
1232 !regexec(store.value_regex, value, 0, NULL, 0)));
1235 static int store_aux(const char *key, const char *value, void *cb)
1237 const char *ep;
1238 size_t section_len;
1240 switch (store.state) {
1241 case KEY_SEEN:
1242 if (matches(key, value)) {
1243 if (store.seen == 1 && store.multi_replace == 0) {
1244 warning("%s has multiple values", key);
1245 } else if (store.seen >= MAX_MATCHES) {
1246 error("too many matches for %s", key);
1247 return 1;
1250 store.offset[store.seen] = cf->do_ftell(cf);
1251 store.seen++;
1253 break;
1254 case SECTION_SEEN:
1256 * What we are looking for is in store.key (both
1257 * section and var), and its section part is baselen
1258 * long. We found key (again, both section and var).
1259 * We would want to know if this key is in the same
1260 * section as what we are looking for. We already
1261 * know we are in the same section as what should
1262 * hold store.key.
1264 ep = strrchr(key, '.');
1265 section_len = ep - key;
1267 if ((section_len != store.baselen) ||
1268 memcmp(key, store.key, section_len+1)) {
1269 store.state = SECTION_END_SEEN;
1270 break;
1274 * Do not increment matches: this is no match, but we
1275 * just made sure we are in the desired section.
1277 store.offset[store.seen] = cf->do_ftell(cf);
1278 /* fallthru */
1279 case SECTION_END_SEEN:
1280 case START:
1281 if (matches(key, value)) {
1282 store.offset[store.seen] = cf->do_ftell(cf);
1283 store.state = KEY_SEEN;
1284 store.seen++;
1285 } else {
1286 if (strrchr(key, '.') - key == store.baselen &&
1287 !strncmp(key, store.key, store.baselen)) {
1288 store.state = SECTION_SEEN;
1289 store.offset[store.seen] = cf->do_ftell(cf);
1293 return 0;
1296 static int write_error(const char *filename)
1298 error("failed to write new configuration file %s", filename);
1300 /* Same error code as "failed to rename". */
1301 return 4;
1304 static int store_write_section(int fd, const char *key)
1306 const char *dot;
1307 int i, success;
1308 struct strbuf sb = STRBUF_INIT;
1310 dot = memchr(key, '.', store.baselen);
1311 if (dot) {
1312 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1313 for (i = dot - key + 1; i < store.baselen; i++) {
1314 if (key[i] == '"' || key[i] == '\\')
1315 strbuf_addch(&sb, '\\');
1316 strbuf_addch(&sb, key[i]);
1318 strbuf_addstr(&sb, "\"]\n");
1319 } else {
1320 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1323 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1324 strbuf_release(&sb);
1326 return success;
1329 static int store_write_pair(int fd, const char *key, const char *value)
1331 int i, success;
1332 int length = strlen(key + store.baselen + 1);
1333 const char *quote = "";
1334 struct strbuf sb = STRBUF_INIT;
1337 * Check to see if the value needs to be surrounded with a dq pair.
1338 * Note that problematic characters are always backslash-quoted; this
1339 * check is about not losing leading or trailing SP and strings that
1340 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1341 * configuration parser.
1343 if (value[0] == ' ')
1344 quote = "\"";
1345 for (i = 0; value[i]; i++)
1346 if (value[i] == ';' || value[i] == '#')
1347 quote = "\"";
1348 if (i && value[i - 1] == ' ')
1349 quote = "\"";
1351 strbuf_addf(&sb, "\t%.*s = %s",
1352 length, key + store.baselen + 1, quote);
1354 for (i = 0; value[i]; i++)
1355 switch (value[i]) {
1356 case '\n':
1357 strbuf_addstr(&sb, "\\n");
1358 break;
1359 case '\t':
1360 strbuf_addstr(&sb, "\\t");
1361 break;
1362 case '"':
1363 case '\\':
1364 strbuf_addch(&sb, '\\');
1365 default:
1366 strbuf_addch(&sb, value[i]);
1367 break;
1369 strbuf_addf(&sb, "%s\n", quote);
1371 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1372 strbuf_release(&sb);
1374 return success;
1377 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1378 size_t offset_, int *found_bracket)
1380 size_t equal_offset = size, bracket_offset = size;
1381 ssize_t offset;
1383 contline:
1384 for (offset = offset_-2; offset > 0
1385 && contents[offset] != '\n'; offset--)
1386 switch (contents[offset]) {
1387 case '=': equal_offset = offset; break;
1388 case ']': bracket_offset = offset; break;
1390 if (offset > 0 && contents[offset-1] == '\\') {
1391 offset_ = offset;
1392 goto contline;
1394 if (bracket_offset < equal_offset) {
1395 *found_bracket = 1;
1396 offset = bracket_offset+1;
1397 } else
1398 offset++;
1400 return offset;
1403 int git_config_set_in_file(const char *config_filename,
1404 const char *key, const char *value)
1406 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1409 int git_config_set(const char *key, const char *value)
1411 return git_config_set_multivar(key, value, NULL, 0);
1415 * Auxiliary function to sanity-check and split the key into the section
1416 * identifier and variable name.
1418 * Returns 0 on success, -1 when there is an invalid character in the key and
1419 * -2 if there is no section name in the key.
1421 * store_key - pointer to char* which will hold a copy of the key with
1422 * lowercase section and variable name
1423 * baselen - pointer to int which will hold the length of the
1424 * section + subsection part, can be NULL
1426 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1428 int i, dot, baselen;
1429 const char *last_dot = strrchr(key, '.');
1432 * Since "key" actually contains the section name and the real
1433 * key name separated by a dot, we have to know where the dot is.
1436 if (last_dot == NULL || last_dot == key) {
1437 error("key does not contain a section: %s", key);
1438 return -CONFIG_NO_SECTION_OR_NAME;
1441 if (!last_dot[1]) {
1442 error("key does not contain variable name: %s", key);
1443 return -CONFIG_NO_SECTION_OR_NAME;
1446 baselen = last_dot - key;
1447 if (baselen_)
1448 *baselen_ = baselen;
1451 * Validate the key and while at it, lower case it for matching.
1453 *store_key = xmalloc(strlen(key) + 1);
1455 dot = 0;
1456 for (i = 0; key[i]; i++) {
1457 unsigned char c = key[i];
1458 if (c == '.')
1459 dot = 1;
1460 /* Leave the extended basename untouched.. */
1461 if (!dot || i > baselen) {
1462 if (!iskeychar(c) ||
1463 (i == baselen + 1 && !isalpha(c))) {
1464 error("invalid key: %s", key);
1465 goto out_free_ret_1;
1467 c = tolower(c);
1468 } else if (c == '\n') {
1469 error("invalid key (newline): %s", key);
1470 goto out_free_ret_1;
1472 (*store_key)[i] = c;
1474 (*store_key)[i] = 0;
1476 return 0;
1478 out_free_ret_1:
1479 free(*store_key);
1480 *store_key = NULL;
1481 return -CONFIG_INVALID_KEY;
1485 * If value==NULL, unset in (remove from) config,
1486 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1487 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1488 * else all matching key/values (regardless how many) are removed,
1489 * before the new pair is written.
1491 * Returns 0 on success.
1493 * This function does this:
1495 * - it locks the config file by creating ".git/config.lock"
1497 * - it then parses the config using store_aux() as validator to find
1498 * the position on the key/value pair to replace. If it is to be unset,
1499 * it must be found exactly once.
1501 * - the config file is mmap()ed and the part before the match (if any) is
1502 * written to the lock file, then the changed part and the rest.
1504 * - the config file is removed and the lock file rename()d to it.
1507 int git_config_set_multivar_in_file(const char *config_filename,
1508 const char *key, const char *value,
1509 const char *value_regex, int multi_replace)
1511 int fd = -1, in_fd;
1512 int ret;
1513 struct lock_file *lock = NULL;
1514 char *filename_buf = NULL;
1516 /* parse-key returns negative; flip the sign to feed exit(3) */
1517 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1518 if (ret)
1519 goto out_free;
1521 store.multi_replace = multi_replace;
1523 if (!config_filename)
1524 config_filename = filename_buf = git_pathdup("config");
1527 * The lock serves a purpose in addition to locking: the new
1528 * contents of .git/config will be written into it.
1530 lock = xcalloc(sizeof(struct lock_file), 1);
1531 fd = hold_lock_file_for_update(lock, config_filename, 0);
1532 if (fd < 0) {
1533 error("could not lock config file %s: %s", config_filename, strerror(errno));
1534 free(store.key);
1535 ret = CONFIG_NO_LOCK;
1536 goto out_free;
1540 * If .git/config does not exist yet, write a minimal version.
1542 in_fd = open(config_filename, O_RDONLY);
1543 if ( in_fd < 0 ) {
1544 free(store.key);
1546 if ( ENOENT != errno ) {
1547 error("opening %s: %s", config_filename,
1548 strerror(errno));
1549 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1550 goto out_free;
1552 /* if nothing to unset, error out */
1553 if (value == NULL) {
1554 ret = CONFIG_NOTHING_SET;
1555 goto out_free;
1558 store.key = (char *)key;
1559 if (!store_write_section(fd, key) ||
1560 !store_write_pair(fd, key, value))
1561 goto write_err_out;
1562 } else {
1563 struct stat st;
1564 char *contents;
1565 size_t contents_sz, copy_begin, copy_end;
1566 int i, new_line = 0;
1568 if (value_regex == NULL)
1569 store.value_regex = NULL;
1570 else {
1571 if (value_regex[0] == '!') {
1572 store.do_not_match = 1;
1573 value_regex++;
1574 } else
1575 store.do_not_match = 0;
1577 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1578 if (regcomp(store.value_regex, value_regex,
1579 REG_EXTENDED)) {
1580 error("invalid pattern: %s", value_regex);
1581 free(store.value_regex);
1582 ret = CONFIG_INVALID_PATTERN;
1583 goto out_free;
1587 store.offset[0] = 0;
1588 store.state = START;
1589 store.seen = 0;
1592 * After this, store.offset will contain the *end* offset
1593 * of the last match, or remain at 0 if no match was found.
1594 * As a side effect, we make sure to transform only a valid
1595 * existing config file.
1597 if (git_config_from_file(store_aux, config_filename, NULL)) {
1598 error("invalid config file %s", config_filename);
1599 free(store.key);
1600 if (store.value_regex != NULL) {
1601 regfree(store.value_regex);
1602 free(store.value_regex);
1604 ret = CONFIG_INVALID_FILE;
1605 goto out_free;
1608 free(store.key);
1609 if (store.value_regex != NULL) {
1610 regfree(store.value_regex);
1611 free(store.value_regex);
1614 /* if nothing to unset, or too many matches, error out */
1615 if ((store.seen == 0 && value == NULL) ||
1616 (store.seen > 1 && multi_replace == 0)) {
1617 ret = CONFIG_NOTHING_SET;
1618 goto out_free;
1621 fstat(in_fd, &st);
1622 contents_sz = xsize_t(st.st_size);
1623 contents = xmmap(NULL, contents_sz, PROT_READ,
1624 MAP_PRIVATE, in_fd, 0);
1625 close(in_fd);
1627 if (store.seen == 0)
1628 store.seen = 1;
1630 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1631 if (store.offset[i] == 0) {
1632 store.offset[i] = copy_end = contents_sz;
1633 } else if (store.state != KEY_SEEN) {
1634 copy_end = store.offset[i];
1635 } else
1636 copy_end = find_beginning_of_line(
1637 contents, contents_sz,
1638 store.offset[i]-2, &new_line);
1640 if (copy_end > 0 && contents[copy_end-1] != '\n')
1641 new_line = 1;
1643 /* write the first part of the config */
1644 if (copy_end > copy_begin) {
1645 if (write_in_full(fd, contents + copy_begin,
1646 copy_end - copy_begin) <
1647 copy_end - copy_begin)
1648 goto write_err_out;
1649 if (new_line &&
1650 write_str_in_full(fd, "\n") != 1)
1651 goto write_err_out;
1653 copy_begin = store.offset[i];
1656 /* write the pair (value == NULL means unset) */
1657 if (value != NULL) {
1658 if (store.state == START) {
1659 if (!store_write_section(fd, key))
1660 goto write_err_out;
1662 if (!store_write_pair(fd, key, value))
1663 goto write_err_out;
1666 /* write the rest of the config */
1667 if (copy_begin < contents_sz)
1668 if (write_in_full(fd, contents + copy_begin,
1669 contents_sz - copy_begin) <
1670 contents_sz - copy_begin)
1671 goto write_err_out;
1673 munmap(contents, contents_sz);
1676 if (commit_lock_file(lock) < 0) {
1677 error("could not commit config file %s", config_filename);
1678 ret = CONFIG_NO_WRITE;
1679 goto out_free;
1683 * lock is committed, so don't try to roll it back below.
1684 * NOTE: Since lockfile.c keeps a linked list of all created
1685 * lock_file structures, it isn't safe to free(lock). It's
1686 * better to just leave it hanging around.
1688 lock = NULL;
1689 ret = 0;
1691 out_free:
1692 if (lock)
1693 rollback_lock_file(lock);
1694 free(filename_buf);
1695 return ret;
1697 write_err_out:
1698 ret = write_error(lock->filename);
1699 goto out_free;
1703 int git_config_set_multivar(const char *key, const char *value,
1704 const char *value_regex, int multi_replace)
1706 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
1707 multi_replace);
1710 static int section_name_match (const char *buf, const char *name)
1712 int i = 0, j = 0, dot = 0;
1713 if (buf[i] != '[')
1714 return 0;
1715 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1716 if (!dot && isspace(buf[i])) {
1717 dot = 1;
1718 if (name[j++] != '.')
1719 break;
1720 for (i++; isspace(buf[i]); i++)
1721 ; /* do nothing */
1722 if (buf[i] != '"')
1723 break;
1724 continue;
1726 if (buf[i] == '\\' && dot)
1727 i++;
1728 else if (buf[i] == '"' && dot) {
1729 for (i++; isspace(buf[i]); i++)
1730 ; /* do_nothing */
1731 break;
1733 if (buf[i] != name[j++])
1734 break;
1736 if (buf[i] == ']' && name[j] == 0) {
1738 * We match, now just find the right length offset by
1739 * gobbling up any whitespace after it, as well
1741 i++;
1742 for (; buf[i] && isspace(buf[i]); i++)
1743 ; /* do nothing */
1744 return i;
1746 return 0;
1749 static int section_name_is_ok(const char *name)
1751 /* Empty section names are bogus. */
1752 if (!*name)
1753 return 0;
1756 * Before a dot, we must be alphanumeric or dash. After the first dot,
1757 * anything goes, so we can stop checking.
1759 for (; *name && *name != '.'; name++)
1760 if (*name != '-' && !isalnum(*name))
1761 return 0;
1762 return 1;
1765 /* if new_name == NULL, the section is removed instead */
1766 int git_config_rename_section_in_file(const char *config_filename,
1767 const char *old_name, const char *new_name)
1769 int ret = 0, remove = 0;
1770 char *filename_buf = NULL;
1771 struct lock_file *lock;
1772 int out_fd;
1773 char buf[1024];
1774 FILE *config_file;
1776 if (new_name && !section_name_is_ok(new_name)) {
1777 ret = error("invalid section name: %s", new_name);
1778 goto out;
1781 if (!config_filename)
1782 config_filename = filename_buf = git_pathdup("config");
1784 lock = xcalloc(sizeof(struct lock_file), 1);
1785 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1786 if (out_fd < 0) {
1787 ret = error("could not lock config file %s", config_filename);
1788 goto out;
1791 if (!(config_file = fopen(config_filename, "rb"))) {
1792 /* no config file means nothing to rename, no error */
1793 goto unlock_and_out;
1796 while (fgets(buf, sizeof(buf), config_file)) {
1797 int i;
1798 int length;
1799 char *output = buf;
1800 for (i = 0; buf[i] && isspace(buf[i]); i++)
1801 ; /* do nothing */
1802 if (buf[i] == '[') {
1803 /* it's a section */
1804 int offset = section_name_match(&buf[i], old_name);
1805 if (offset > 0) {
1806 ret++;
1807 if (new_name == NULL) {
1808 remove = 1;
1809 continue;
1811 store.baselen = strlen(new_name);
1812 if (!store_write_section(out_fd, new_name)) {
1813 ret = write_error(lock->filename);
1814 goto out;
1817 * We wrote out the new section, with
1818 * a newline, now skip the old
1819 * section's length
1821 output += offset + i;
1822 if (strlen(output) > 0) {
1824 * More content means there's
1825 * a declaration to put on the
1826 * next line; indent with a
1827 * tab
1829 output -= 1;
1830 output[0] = '\t';
1833 remove = 0;
1835 if (remove)
1836 continue;
1837 length = strlen(output);
1838 if (write_in_full(out_fd, output, length) != length) {
1839 ret = write_error(lock->filename);
1840 goto out;
1843 fclose(config_file);
1844 unlock_and_out:
1845 if (commit_lock_file(lock) < 0)
1846 ret = error("could not commit config file %s", config_filename);
1847 out:
1848 free(filename_buf);
1849 return ret;
1852 int git_config_rename_section(const char *old_name, const char *new_name)
1854 return git_config_rename_section_in_file(NULL, old_name, new_name);
1858 * Call this to report error for your variable that should not
1859 * get a boolean value (i.e. "[my] var" means "true").
1861 #undef config_error_nonbool
1862 int config_error_nonbool(const char *var)
1864 return error("Missing value for '%s'", var);
1867 int parse_config_key(const char *var,
1868 const char *section,
1869 const char **subsection, int *subsection_len,
1870 const char **key)
1872 int section_len = strlen(section);
1873 const char *dot;
1875 /* Does it start with "section." ? */
1876 if (prefixcmp(var, section) || var[section_len] != '.')
1877 return -1;
1880 * Find the key; we don't know yet if we have a subsection, but we must
1881 * parse backwards from the end, since the subsection may have dots in
1882 * it, too.
1884 dot = strrchr(var, '.');
1885 *key = dot + 1;
1887 /* Did we have a subsection at all? */
1888 if (dot == var + section_len) {
1889 *subsection = NULL;
1890 *subsection_len = 0;
1892 else {
1893 *subsection = var + section_len + 1;
1894 *subsection_len = dot - *subsection;
1897 return 0;