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refs: make lock generic
[git.git] / config.c
blob10b5c957ae714e850c9029ac23f88be407db3173
1 /*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
7 */
8 #include "cache.h"
9 #include "lockfile.h"
10 #include "exec_cmd.h"
11 #include "strbuf.h"
12 #include "quote.h"
13 #include "hashmap.h"
14 #include "string-list.h"
15 #include "utf8.h"
16
17 struct config_source {
18 struct config_source *prev;
19 union {
20 FILE *file;
21 struct config_buf {
22 const char *buf;
23 size_t len;
24 size_t pos;
25 } buf;
26 } u;
27 const char *origin_type;
28 const char *name;
29 const char *path;
30 int die_on_error;
31 int linenr;
32 int eof;
33 struct strbuf value;
34 struct strbuf var;
35
36 int (*do_fgetc)(struct config_source *c);
37 int (*do_ungetc)(int c, struct config_source *conf);
38 long (*do_ftell)(struct config_source *c);
39 };
40
41 static struct config_source *cf;
42
43 static int zlib_compression_seen;
44
45 /*
46 * Default config_set that contains key-value pairs from the usual set of config
47 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
48 * config file and the global /etc/gitconfig)
49 */
50 static struct config_set the_config_set;
51
52 static int config_file_fgetc(struct config_source *conf)
53 {
54 return getc_unlocked(conf->u.file);
55 }
56
57 static int config_file_ungetc(int c, struct config_source *conf)
58 {
59 return ungetc(c, conf->u.file);
60 }
61
62 static long config_file_ftell(struct config_source *conf)
63 {
64 return ftell(conf->u.file);
65 }
66
67
68 static int config_buf_fgetc(struct config_source *conf)
69 {
70 if (conf->u.buf.pos < conf->u.buf.len)
71 return conf->u.buf.buf[conf->u.buf.pos++];
72
73 return EOF;
74 }
75
76 static int config_buf_ungetc(int c, struct config_source *conf)
77 {
78 if (conf->u.buf.pos > 0) {
79 conf->u.buf.pos--;
80 if (conf->u.buf.buf[conf->u.buf.pos] != c)
81 die("BUG: config_buf can only ungetc the same character");
82 return c;
83 }
84
85 return EOF;
86 }
87
88 static long config_buf_ftell(struct config_source *conf)
89 {
90 return conf->u.buf.pos;
91 }
92
93 #define MAX_INCLUDE_DEPTH 10
94 static const char include_depth_advice[] =
95 "exceeded maximum include depth (%d) while including\n"
96 " %s\n"
97 "from\n"
98 " %s\n"
99 "Do you have circular includes?";
100 static int handle_path_include(const char *path, struct config_include_data *inc)
101 {
102 int ret = 0;
103 struct strbuf buf = STRBUF_INIT;
104 char *expanded;
105
106 if (!path)
107 return config_error_nonbool("include.path");
108
109 expanded = expand_user_path(path);
110 if (!expanded)
111 return error("could not expand include path '%s'", path);
112 path = expanded;
113
114 /*
115 * Use an absolute path as-is, but interpret relative paths
116 * based on the including config file.
117 */
118 if (!is_absolute_path(path)) {
119 char *slash;
120
121 if (!cf || !cf->path)
122 return error("relative config includes must come from files");
123
124 slash = find_last_dir_sep(cf->path);
125 if (slash)
126 strbuf_add(&buf, cf->path, slash - cf->path + 1);
127 strbuf_addstr(&buf, path);
128 path = buf.buf;
129 }
130
131 if (!access_or_die(path, R_OK, 0)) {
132 if (++inc->depth > MAX_INCLUDE_DEPTH)
133 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
134 cf && cf->name ? cf->name : "the command line");
135 ret = git_config_from_file(git_config_include, path, inc);
136 inc->depth--;
137 }
138 strbuf_release(&buf);
139 free(expanded);
140 return ret;
141 }
142
143 int git_config_include(const char *var, const char *value, void *data)
144 {
145 struct config_include_data *inc = data;
146 int ret;
147
148 /*
149 * Pass along all values, including "include" directives; this makes it
150 * possible to query information on the includes themselves.
151 */
152 ret = inc->fn(var, value, inc->data);
153 if (ret < 0)
154 return ret;
155
156 if (!strcmp(var, "include.path"))
157 ret = handle_path_include(value, inc);
158 return ret;
159 }
160
161 void git_config_push_parameter(const char *text)
162 {
163 struct strbuf env = STRBUF_INIT;
164 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
165 if (old && *old) {
166 strbuf_addstr(&env, old);
167 strbuf_addch(&env, ' ');
168 }
169 sq_quote_buf(&env, text);
170 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
171 strbuf_release(&env);
172 }
173
174 int git_config_parse_parameter(const char *text,
175 config_fn_t fn, void *data)
176 {
177 const char *value;
178 struct strbuf **pair;
179
180 pair = strbuf_split_str(text, '=', 2);
181 if (!pair[0])
182 return error("bogus config parameter: %s", text);
183
184 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
185 strbuf_setlen(pair[0], pair[0]->len - 1);
186 value = pair[1] ? pair[1]->buf : "";
187 } else {
188 value = NULL;
189 }
190
191 strbuf_trim(pair[0]);
192 if (!pair[0]->len) {
193 strbuf_list_free(pair);
194 return error("bogus config parameter: %s", text);
195 }
196 strbuf_tolower(pair[0]);
197 if (fn(pair[0]->buf, value, data) < 0) {
198 strbuf_list_free(pair);
199 return -1;
200 }
201 strbuf_list_free(pair);
202 return 0;
203 }
204
205 int git_config_from_parameters(config_fn_t fn, void *data)
206 {
207 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
208 char *envw;
209 const char **argv = NULL;
210 int nr = 0, alloc = 0;
211 int i;
212
213 if (!env)
214 return 0;
215 /* sq_dequote will write over it */
216 envw = xstrdup(env);
217
218 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
219 free(envw);
220 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
221 }
222
223 for (i = 0; i < nr; i++) {
224 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
225 free(argv);
226 free(envw);
227 return -1;
228 }
229 }
230
231 free(argv);
232 free(envw);
233 return nr > 0;
234 }
235
236 static int get_next_char(void)
237 {
238 int c = cf->do_fgetc(cf);
239
240 if (c == '\r') {
241 /* DOS like systems */
242 c = cf->do_fgetc(cf);
243 if (c != '\n') {
244 if (c != EOF)
245 cf->do_ungetc(c, cf);
246 c = '\r';
247 }
248 }
249 if (c == '\n')
250 cf->linenr++;
251 if (c == EOF) {
252 cf->eof = 1;
253 cf->linenr++;
254 c = '\n';
255 }
256 return c;
257 }
258
259 static char *parse_value(void)
260 {
261 int quote = 0, comment = 0, space = 0;
262
263 strbuf_reset(&cf->value);
264 for (;;) {
265 int c = get_next_char();
266 if (c == '\n') {
267 if (quote) {
268 cf->linenr--;
269 return NULL;
270 }
271 return cf->value.buf;
272 }
273 if (comment)
274 continue;
275 if (isspace(c) && !quote) {
276 if (cf->value.len)
277 space++;
278 continue;
279 }
280 if (!quote) {
281 if (c == ';' || c == '#') {
282 comment = 1;
283 continue;
284 }
285 }
286 for (; space; space--)
287 strbuf_addch(&cf->value, ' ');
288 if (c == '\\') {
289 c = get_next_char();
290 switch (c) {
291 case '\n':
292 continue;
293 case 't':
294 c = '\t';
295 break;
296 case 'b':
297 c = '\b';
298 break;
299 case 'n':
300 c = '\n';
301 break;
302 /* Some characters escape as themselves */
303 case '\\': case '"':
304 break;
305 /* Reject unknown escape sequences */
306 default:
307 return NULL;
308 }
309 strbuf_addch(&cf->value, c);
310 continue;
311 }
312 if (c == '"') {
313 quote = 1-quote;
314 continue;
315 }
316 strbuf_addch(&cf->value, c);
317 }
318 }
319
320 static inline int iskeychar(int c)
321 {
322 return isalnum(c) || c == '-';
323 }
324
325 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
326 {
327 int c;
328 char *value;
329 int ret;
330
331 /* Get the full name */
332 for (;;) {
333 c = get_next_char();
334 if (cf->eof)
335 break;
336 if (!iskeychar(c))
337 break;
338 strbuf_addch(name, tolower(c));
339 }
340
341 while (c == ' ' || c == '\t')
342 c = get_next_char();
343
344 value = NULL;
345 if (c != '\n') {
346 if (c != '=')
347 return -1;
348 value = parse_value();
349 if (!value)
350 return -1;
351 }
352 /*
353 * We already consumed the \n, but we need linenr to point to
354 * the line we just parsed during the call to fn to get
355 * accurate line number in error messages.
356 */
357 cf->linenr--;
358 ret = fn(name->buf, value, data);
359 cf->linenr++;
360 return ret;
361 }
362
363 static int get_extended_base_var(struct strbuf *name, int c)
364 {
365 do {
366 if (c == '\n')
367 goto error_incomplete_line;
368 c = get_next_char();
369 } while (isspace(c));
370
371 /* We require the format to be '[base "extension"]' */
372 if (c != '"')
373 return -1;
374 strbuf_addch(name, '.');
375
376 for (;;) {
377 int c = get_next_char();
378 if (c == '\n')
379 goto error_incomplete_line;
380 if (c == '"')
381 break;
382 if (c == '\\') {
383 c = get_next_char();
384 if (c == '\n')
385 goto error_incomplete_line;
386 }
387 strbuf_addch(name, c);
388 }
389
390 /* Final ']' */
391 if (get_next_char() != ']')
392 return -1;
393 return 0;
394 error_incomplete_line:
395 cf->linenr--;
396 return -1;
397 }
398
399 static int get_base_var(struct strbuf *name)
400 {
401 for (;;) {
402 int c = get_next_char();
403 if (cf->eof)
404 return -1;
405 if (c == ']')
406 return 0;
407 if (isspace(c))
408 return get_extended_base_var(name, c);
409 if (!iskeychar(c) && c != '.')
410 return -1;
411 strbuf_addch(name, tolower(c));
412 }
413 }
414
415 static int git_parse_source(config_fn_t fn, void *data)
416 {
417 int comment = 0;
418 int baselen = 0;
419 struct strbuf *var = &cf->var;
420
421 /* U+FEFF Byte Order Mark in UTF8 */
422 const char *bomptr = utf8_bom;
423
424 for (;;) {
425 int c = get_next_char();
426 if (bomptr && *bomptr) {
427 /* We are at the file beginning; skip UTF8-encoded BOM
428 * if present. Sane editors won't put this in on their
429 * own, but e.g. Windows Notepad will do it happily. */
430 if (c == (*bomptr & 0377)) {
431 bomptr++;
432 continue;
433 } else {
434 /* Do not tolerate partial BOM. */
435 if (bomptr != utf8_bom)
436 break;
437 /* No BOM at file beginning. Cool. */
438 bomptr = NULL;
439 }
440 }
441 if (c == '\n') {
442 if (cf->eof)
443 return 0;
444 comment = 0;
445 continue;
446 }
447 if (comment || isspace(c))
448 continue;
449 if (c == '#' || c == ';') {
450 comment = 1;
451 continue;
452 }
453 if (c == '[') {
454 /* Reset prior to determining a new stem */
455 strbuf_reset(var);
456 if (get_base_var(var) < 0 || var->len < 1)
457 break;
458 strbuf_addch(var, '.');
459 baselen = var->len;
460 continue;
461 }
462 if (!isalpha(c))
463 break;
464 /*
465 * Truncate the var name back to the section header
466 * stem prior to grabbing the suffix part of the name
467 * and the value.
468 */
469 strbuf_setlen(var, baselen);
470 strbuf_addch(var, tolower(c));
471 if (get_value(fn, data, var) < 0)
472 break;
473 }
474 if (cf->die_on_error)
475 die(_("bad config line %d in %s %s"), cf->linenr, cf->origin_type, cf->name);
476 else
477 return error(_("bad config line %d in %s %s"), cf->linenr, cf->origin_type, cf->name);
478 }
479
480 static int parse_unit_factor(const char *end, uintmax_t *val)
481 {
482 if (!*end)
483 return 1;
484 else if (!strcasecmp(end, "k")) {
485 *val *= 1024;
486 return 1;
487 }
488 else if (!strcasecmp(end, "m")) {
489 *val *= 1024 * 1024;
490 return 1;
491 }
492 else if (!strcasecmp(end, "g")) {
493 *val *= 1024 * 1024 * 1024;
494 return 1;
495 }
496 return 0;
497 }
498
499 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
500 {
501 if (value && *value) {
502 char *end;
503 intmax_t val;
504 uintmax_t uval;
505 uintmax_t factor = 1;
506
507 errno = 0;
508 val = strtoimax(value, &end, 0);
509 if (errno == ERANGE)
510 return 0;
511 if (!parse_unit_factor(end, &factor)) {
512 errno = EINVAL;
513 return 0;
514 }
515 uval = labs(val);
516 uval *= factor;
517 if (uval > max || labs(val) > uval) {
518 errno = ERANGE;
519 return 0;
520 }
521 val *= factor;
522 *ret = val;
523 return 1;
524 }
525 errno = EINVAL;
526 return 0;
527 }
528
529 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
530 {
531 if (value && *value) {
532 char *end;
533 uintmax_t val;
534 uintmax_t oldval;
535
536 errno = 0;
537 val = strtoumax(value, &end, 0);
538 if (errno == ERANGE)
539 return 0;
540 oldval = val;
541 if (!parse_unit_factor(end, &val)) {
542 errno = EINVAL;
543 return 0;
544 }
545 if (val > max || oldval > val) {
546 errno = ERANGE;
547 return 0;
548 }
549 *ret = val;
550 return 1;
551 }
552 errno = EINVAL;
553 return 0;
554 }
555
556 static int git_parse_int(const char *value, int *ret)
557 {
558 intmax_t tmp;
559 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
560 return 0;
561 *ret = tmp;
562 return 1;
563 }
564
565 static int git_parse_int64(const char *value, int64_t *ret)
566 {
567 intmax_t tmp;
568 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
569 return 0;
570 *ret = tmp;
571 return 1;
572 }
573
574 int git_parse_ulong(const char *value, unsigned long *ret)
575 {
576 uintmax_t tmp;
577 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
578 return 0;
579 *ret = tmp;
580 return 1;
581 }
582
583 NORETURN
584 static void die_bad_number(const char *name, const char *value)
585 {
586 const char *reason = errno == ERANGE ?
587 "out of range" :
588 "invalid unit";
589 if (!value)
590 value = "";
591
592 if (cf && cf->origin_type && cf->name)
593 die(_("bad numeric config value '%s' for '%s' in %s %s: %s"),
594 value, name, cf->origin_type, cf->name, reason);
595 die(_("bad numeric config value '%s' for '%s': %s"), value, name, reason);
596 }
597
598 int git_config_int(const char *name, const char *value)
599 {
600 int ret;
601 if (!git_parse_int(value, &ret))
602 die_bad_number(name, value);
603 return ret;
604 }
605
606 int64_t git_config_int64(const char *name, const char *value)
607 {
608 int64_t ret;
609 if (!git_parse_int64(value, &ret))
610 die_bad_number(name, value);
611 return ret;
612 }
613
614 unsigned long git_config_ulong(const char *name, const char *value)
615 {
616 unsigned long ret;
617 if (!git_parse_ulong(value, &ret))
618 die_bad_number(name, value);
619 return ret;
620 }
621
622 int git_parse_maybe_bool(const char *value)
623 {
624 if (!value)
625 return 1;
626 if (!*value)
627 return 0;
628 if (!strcasecmp(value, "true")
629 || !strcasecmp(value, "yes")
630 || !strcasecmp(value, "on"))
631 return 1;
632 if (!strcasecmp(value, "false")
633 || !strcasecmp(value, "no")
634 || !strcasecmp(value, "off"))
635 return 0;
636 return -1;
637 }
638
639 int git_config_maybe_bool(const char *name, const char *value)
640 {
641 int v = git_parse_maybe_bool(value);
642 if (0 <= v)
643 return v;
644 if (git_parse_int(value, &v))
645 return !!v;
646 return -1;
647 }
648
649 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
650 {
651 int v = git_parse_maybe_bool(value);
652 if (0 <= v) {
653 *is_bool = 1;
654 return v;
655 }
656 *is_bool = 0;
657 return git_config_int(name, value);
658 }
659
660 int git_config_bool(const char *name, const char *value)
661 {
662 int discard;
663 return !!git_config_bool_or_int(name, value, &discard);
664 }
665
666 int git_config_string(const char **dest, const char *var, const char *value)
667 {
668 if (!value)
669 return config_error_nonbool(var);
670 *dest = xstrdup(value);
671 return 0;
672 }
673
674 int git_config_pathname(const char **dest, const char *var, const char *value)
675 {
676 if (!value)
677 return config_error_nonbool(var);
678 *dest = expand_user_path(value);
679 if (!*dest)
680 die(_("failed to expand user dir in: '%s'"), value);
681 return 0;
682 }
683
684 static int git_default_core_config(const char *var, const char *value)
685 {
686 /* This needs a better name */
687 if (!strcmp(var, "core.filemode")) {
688 trust_executable_bit = git_config_bool(var, value);
689 return 0;
690 }
691 if (!strcmp(var, "core.trustctime")) {
692 trust_ctime = git_config_bool(var, value);
693 return 0;
694 }
695 if (!strcmp(var, "core.checkstat")) {
696 if (!strcasecmp(value, "default"))
697 check_stat = 1;
698 else if (!strcasecmp(value, "minimal"))
699 check_stat = 0;
700 }
701
702 if (!strcmp(var, "core.quotepath")) {
703 quote_path_fully = git_config_bool(var, value);
704 return 0;
705 }
706
707 if (!strcmp(var, "core.symlinks")) {
708 has_symlinks = git_config_bool(var, value);
709 return 0;
710 }
711
712 if (!strcmp(var, "core.ignorecase")) {
713 ignore_case = git_config_bool(var, value);
714 return 0;
715 }
716
717 if (!strcmp(var, "core.attributesfile"))
718 return git_config_pathname(&git_attributes_file, var, value);
719
720 if (!strcmp(var, "core.bare")) {
721 is_bare_repository_cfg = git_config_bool(var, value);
722 return 0;
723 }
724
725 if (!strcmp(var, "core.ignorestat")) {
726 assume_unchanged = git_config_bool(var, value);
727 return 0;
728 }
729
730 if (!strcmp(var, "core.prefersymlinkrefs")) {
731 prefer_symlink_refs = git_config_bool(var, value);
732 return 0;
733 }
734
735 if (!strcmp(var, "core.logallrefupdates")) {
736 log_all_ref_updates = git_config_bool(var, value);
737 return 0;
738 }
739
740 if (!strcmp(var, "core.warnambiguousrefs")) {
741 warn_ambiguous_refs = git_config_bool(var, value);
742 return 0;
743 }
744
745 if (!strcmp(var, "core.abbrev")) {
746 int abbrev = git_config_int(var, value);
747 if (abbrev < minimum_abbrev || abbrev > 40)
748 return -1;
749 default_abbrev = abbrev;
750 return 0;
751 }
752
753 if (!strcmp(var, "core.loosecompression")) {
754 int level = git_config_int(var, value);
755 if (level == -1)
756 level = Z_DEFAULT_COMPRESSION;
757 else if (level < 0 || level > Z_BEST_COMPRESSION)
758 die(_("bad zlib compression level %d"), level);
759 zlib_compression_level = level;
760 zlib_compression_seen = 1;
761 return 0;
762 }
763
764 if (!strcmp(var, "core.compression")) {
765 int level = git_config_int(var, value);
766 if (level == -1)
767 level = Z_DEFAULT_COMPRESSION;
768 else if (level < 0 || level > Z_BEST_COMPRESSION)
769 die(_("bad zlib compression level %d"), level);
770 core_compression_level = level;
771 core_compression_seen = 1;
772 if (!zlib_compression_seen)
773 zlib_compression_level = level;
774 return 0;
775 }
776
777 if (!strcmp(var, "core.packedgitwindowsize")) {
778 int pgsz_x2 = getpagesize() * 2;
779 packed_git_window_size = git_config_ulong(var, value);
780
781 /* This value must be multiple of (pagesize * 2) */
782 packed_git_window_size /= pgsz_x2;
783 if (packed_git_window_size < 1)
784 packed_git_window_size = 1;
785 packed_git_window_size *= pgsz_x2;
786 return 0;
787 }
788
789 if (!strcmp(var, "core.bigfilethreshold")) {
790 big_file_threshold = git_config_ulong(var, value);
791 return 0;
792 }
793
794 if (!strcmp(var, "core.packedgitlimit")) {
795 packed_git_limit = git_config_ulong(var, value);
796 return 0;
797 }
798
799 if (!strcmp(var, "core.deltabasecachelimit")) {
800 delta_base_cache_limit = git_config_ulong(var, value);
801 return 0;
802 }
803
804 if (!strcmp(var, "core.autocrlf")) {
805 if (value && !strcasecmp(value, "input")) {
806 if (core_eol == EOL_CRLF)
807 return error("core.autocrlf=input conflicts with core.eol=crlf");
808 auto_crlf = AUTO_CRLF_INPUT;
809 return 0;
810 }
811 auto_crlf = git_config_bool(var, value);
812 return 0;
813 }
814
815 if (!strcmp(var, "core.safecrlf")) {
816 if (value && !strcasecmp(value, "warn")) {
817 safe_crlf = SAFE_CRLF_WARN;
818 return 0;
819 }
820 safe_crlf = git_config_bool(var, value);
821 return 0;
822 }
823
824 if (!strcmp(var, "core.eol")) {
825 if (value && !strcasecmp(value, "lf"))
826 core_eol = EOL_LF;
827 else if (value && !strcasecmp(value, "crlf"))
828 core_eol = EOL_CRLF;
829 else if (value && !strcasecmp(value, "native"))
830 core_eol = EOL_NATIVE;
831 else
832 core_eol = EOL_UNSET;
833 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
834 return error("core.autocrlf=input conflicts with core.eol=crlf");
835 return 0;
836 }
837
838 if (!strcmp(var, "core.notesref")) {
839 notes_ref_name = xstrdup(value);
840 return 0;
841 }
842
843 if (!strcmp(var, "core.pager"))
844 return git_config_string(&pager_program, var, value);
845
846 if (!strcmp(var, "core.editor"))
847 return git_config_string(&editor_program, var, value);
848
849 if (!strcmp(var, "core.commentchar")) {
850 if (!value)
851 return config_error_nonbool(var);
852 else if (!strcasecmp(value, "auto"))
853 auto_comment_line_char = 1;
854 else if (value[0] && !value[1]) {
855 comment_line_char = value[0];
856 auto_comment_line_char = 0;
857 } else
858 return error("core.commentChar should only be one character");
859 return 0;
860 }
861
862 if (!strcmp(var, "core.askpass"))
863 return git_config_string(&askpass_program, var, value);
864
865 if (!strcmp(var, "core.excludesfile"))
866 return git_config_pathname(&excludes_file, var, value);
867
868 if (!strcmp(var, "core.whitespace")) {
869 if (!value)
870 return config_error_nonbool(var);
871 whitespace_rule_cfg = parse_whitespace_rule(value);
872 return 0;
873 }
874
875 if (!strcmp(var, "core.fsyncobjectfiles")) {
876 fsync_object_files = git_config_bool(var, value);
877 return 0;
878 }
879
880 if (!strcmp(var, "core.preloadindex")) {
881 core_preload_index = git_config_bool(var, value);
882 return 0;
883 }
884
885 if (!strcmp(var, "core.createobject")) {
886 if (!strcmp(value, "rename"))
887 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
888 else if (!strcmp(value, "link"))
889 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
890 else
891 die(_("invalid mode for object creation: %s"), value);
892 return 0;
893 }
894
895 if (!strcmp(var, "core.sparsecheckout")) {
896 core_apply_sparse_checkout = git_config_bool(var, value);
897 return 0;
898 }
899
900 if (!strcmp(var, "core.precomposeunicode")) {
901 precomposed_unicode = git_config_bool(var, value);
902 return 0;
903 }
904
905 if (!strcmp(var, "core.protecthfs")) {
906 protect_hfs = git_config_bool(var, value);
907 return 0;
908 }
909
910 if (!strcmp(var, "core.protectntfs")) {
911 protect_ntfs = git_config_bool(var, value);
912 return 0;
913 }
914
915 /* Add other config variables here and to Documentation/config.txt. */
916 return 0;
917 }
918
919 static int git_default_i18n_config(const char *var, const char *value)
920 {
921 if (!strcmp(var, "i18n.commitencoding"))
922 return git_config_string(&git_commit_encoding, var, value);
923
924 if (!strcmp(var, "i18n.logoutputencoding"))
925 return git_config_string(&git_log_output_encoding, var, value);
926
927 /* Add other config variables here and to Documentation/config.txt. */
928 return 0;
929 }
930
931 static int git_default_branch_config(const char *var, const char *value)
932 {
933 if (!strcmp(var, "branch.autosetupmerge")) {
934 if (value && !strcasecmp(value, "always")) {
935 git_branch_track = BRANCH_TRACK_ALWAYS;
936 return 0;
937 }
938 git_branch_track = git_config_bool(var, value);
939 return 0;
940 }
941 if (!strcmp(var, "branch.autosetuprebase")) {
942 if (!value)
943 return config_error_nonbool(var);
944 else if (!strcmp(value, "never"))
945 autorebase = AUTOREBASE_NEVER;
946 else if (!strcmp(value, "local"))
947 autorebase = AUTOREBASE_LOCAL;
948 else if (!strcmp(value, "remote"))
949 autorebase = AUTOREBASE_REMOTE;
950 else if (!strcmp(value, "always"))
951 autorebase = AUTOREBASE_ALWAYS;
952 else
953 return error("malformed value for %s", var);
954 return 0;
955 }
956
957 /* Add other config variables here and to Documentation/config.txt. */
958 return 0;
959 }
960
961 static int git_default_push_config(const char *var, const char *value)
962 {
963 if (!strcmp(var, "push.default")) {
964 if (!value)
965 return config_error_nonbool(var);
966 else if (!strcmp(value, "nothing"))
967 push_default = PUSH_DEFAULT_NOTHING;
968 else if (!strcmp(value, "matching"))
969 push_default = PUSH_DEFAULT_MATCHING;
970 else if (!strcmp(value, "simple"))
971 push_default = PUSH_DEFAULT_SIMPLE;
972 else if (!strcmp(value, "upstream"))
973 push_default = PUSH_DEFAULT_UPSTREAM;
974 else if (!strcmp(value, "tracking")) /* deprecated */
975 push_default = PUSH_DEFAULT_UPSTREAM;
976 else if (!strcmp(value, "current"))
977 push_default = PUSH_DEFAULT_CURRENT;
978 else {
979 error("malformed value for %s: %s", var, value);
980 return error("Must be one of nothing, matching, simple, "
981 "upstream or current.");
982 }
983 return 0;
984 }
985
986 /* Add other config variables here and to Documentation/config.txt. */
987 return 0;
988 }
989
990 static int git_default_mailmap_config(const char *var, const char *value)
991 {
992 if (!strcmp(var, "mailmap.file"))
993 return git_config_pathname(&git_mailmap_file, var, value);
994 if (!strcmp(var, "mailmap.blob"))
995 return git_config_string(&git_mailmap_blob, var, value);
996
997 /* Add other config variables here and to Documentation/config.txt. */
998 return 0;
999 }
1000
1001 int git_default_config(const char *var, const char *value, void *dummy)
1002 {
1003 if (starts_with(var, "core."))
1004 return git_default_core_config(var, value);
1005
1006 if (starts_with(var, "user."))
1007 return git_ident_config(var, value, dummy);
1008
1009 if (starts_with(var, "i18n."))
1010 return git_default_i18n_config(var, value);
1011
1012 if (starts_with(var, "branch."))
1013 return git_default_branch_config(var, value);
1014
1015 if (starts_with(var, "push."))
1016 return git_default_push_config(var, value);
1017
1018 if (starts_with(var, "mailmap."))
1019 return git_default_mailmap_config(var, value);
1020
1021 if (starts_with(var, "advice."))
1022 return git_default_advice_config(var, value);
1023
1024 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1025 pager_use_color = git_config_bool(var,value);
1026 return 0;
1027 }
1028
1029 if (!strcmp(var, "pack.packsizelimit")) {
1030 pack_size_limit_cfg = git_config_ulong(var, value);
1031 return 0;
1032 }
1033 /* Add other config variables here and to Documentation/config.txt. */
1034 return 0;
1035 }
1036
1037 /*
1038 * All source specific fields in the union, die_on_error, name and the callbacks
1039 * fgetc, ungetc, ftell of top need to be initialized before calling
1040 * this function.
1041 */
1042 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1043 {
1044 int ret;
1045
1046 /* push config-file parsing state stack */
1047 top->prev = cf;
1048 top->linenr = 1;
1049 top->eof = 0;
1050 strbuf_init(&top->value, 1024);
1051 strbuf_init(&top->var, 1024);
1052 cf = top;
1053
1054 ret = git_parse_source(fn, data);
1055
1056 /* pop config-file parsing state stack */
1057 strbuf_release(&top->value);
1058 strbuf_release(&top->var);
1059 cf = top->prev;
1060
1061 return ret;
1062 }
1063
1064 static int do_config_from_file(config_fn_t fn,
1065 const char *origin_type, const char *name, const char *path, FILE *f,
1066 void *data)
1067 {
1068 struct config_source top;
1069
1070 top.u.file = f;
1071 top.origin_type = origin_type;
1072 top.name = name;
1073 top.path = path;
1074 top.die_on_error = 1;
1075 top.do_fgetc = config_file_fgetc;
1076 top.do_ungetc = config_file_ungetc;
1077 top.do_ftell = config_file_ftell;
1078
1079 return do_config_from(&top, fn, data);
1080 }
1081
1082 static int git_config_from_stdin(config_fn_t fn, void *data)
1083 {
1084 return do_config_from_file(fn, "standard input", "", NULL, stdin, data);
1085 }
1086
1087 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1088 {
1089 int ret = -1;
1090 FILE *f;
1091
1092 f = fopen(filename, "r");
1093 if (f) {
1094 flockfile(f);
1095 ret = do_config_from_file(fn, "file", filename, filename, f, data);
1096 funlockfile(f);
1097 fclose(f);
1098 }
1099 return ret;
1100 }
1101
1102 int git_config_from_mem(config_fn_t fn, const char *origin_type,
1103 const char *name, const char *buf, size_t len, void *data)
1104 {
1105 struct config_source top;
1106
1107 top.u.buf.buf = buf;
1108 top.u.buf.len = len;
1109 top.u.buf.pos = 0;
1110 top.origin_type = origin_type;
1111 top.name = name;
1112 top.path = NULL;
1113 top.die_on_error = 0;
1114 top.do_fgetc = config_buf_fgetc;
1115 top.do_ungetc = config_buf_ungetc;
1116 top.do_ftell = config_buf_ftell;
1117
1118 return do_config_from(&top, fn, data);
1119 }
1120
1121 static int git_config_from_blob_sha1(config_fn_t fn,
1122 const char *name,
1123 const unsigned char *sha1,
1124 void *data)
1125 {
1126 enum object_type type;
1127 char *buf;
1128 unsigned long size;
1129 int ret;
1130
1131 buf = read_sha1_file(sha1, &type, &size);
1132 if (!buf)
1133 return error("unable to load config blob object '%s'", name);
1134 if (type != OBJ_BLOB) {
1135 free(buf);
1136 return error("reference '%s' does not point to a blob", name);
1137 }
1138
1139 ret = git_config_from_mem(fn, "blob", name, buf, size, data);
1140 free(buf);
1141
1142 return ret;
1143 }
1144
1145 static int git_config_from_blob_ref(config_fn_t fn,
1146 const char *name,
1147 void *data)
1148 {
1149 unsigned char sha1[20];
1150
1151 if (get_sha1(name, sha1) < 0)
1152 return error("unable to resolve config blob '%s'", name);
1153 return git_config_from_blob_sha1(fn, name, sha1, data);
1154 }
1155
1156 const char *git_etc_gitconfig(void)
1157 {
1158 static const char *system_wide;
1159 if (!system_wide)
1160 system_wide = system_path(ETC_GITCONFIG);
1161 return system_wide;
1162 }
1163
1164 /*
1165 * Parse environment variable 'k' as a boolean (in various
1166 * possible spellings); if missing, use the default value 'def'.
1167 */
1168 int git_env_bool(const char *k, int def)
1169 {
1170 const char *v = getenv(k);
1171 return v ? git_config_bool(k, v) : def;
1172 }
1173
1174 /*
1175 * Parse environment variable 'k' as ulong with possibly a unit
1176 * suffix; if missing, use the default value 'val'.
1177 */
1178 unsigned long git_env_ulong(const char *k, unsigned long val)
1179 {
1180 const char *v = getenv(k);
1181 if (v && !git_parse_ulong(v, &val))
1182 die("failed to parse %s", k);
1183 return val;
1184 }
1185
1186 int git_config_system(void)
1187 {
1188 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1189 }
1190
1191 static int do_git_config_sequence(config_fn_t fn, void *data)
1192 {
1193 int ret = 0, found = 0;
1194 char *xdg_config = xdg_config_home("config");
1195 char *user_config = expand_user_path("~/.gitconfig");
1196 char *repo_config = git_pathdup("config");
1197
1198 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
1199 ret += git_config_from_file(fn, git_etc_gitconfig(),
1200 data);
1201 found += 1;
1202 }
1203
1204 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
1205 ret += git_config_from_file(fn, xdg_config, data);
1206 found += 1;
1207 }
1208
1209 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
1210 ret += git_config_from_file(fn, user_config, data);
1211 found += 1;
1212 }
1213
1214 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
1215 ret += git_config_from_file(fn, repo_config, data);
1216 found += 1;
1217 }
1218
1219 switch (git_config_from_parameters(fn, data)) {
1220 case -1: /* error */
1221 die(_("unable to parse command-line config"));
1222 break;
1223 case 0: /* found nothing */
1224 break;
1225 default: /* found at least one item */
1226 found++;
1227 break;
1228 }
1229
1230 free(xdg_config);
1231 free(user_config);
1232 free(repo_config);
1233 return ret == 0 ? found : ret;
1234 }
1235
1236 int git_config_with_options(config_fn_t fn, void *data,
1237 struct git_config_source *config_source,
1238 int respect_includes)
1239 {
1240 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1241
1242 if (respect_includes) {
1243 inc.fn = fn;
1244 inc.data = data;
1245 fn = git_config_include;
1246 data = &inc;
1247 }
1248
1249 /*
1250 * If we have a specific filename, use it. Otherwise, follow the
1251 * regular lookup sequence.
1252 */
1253 if (config_source && config_source->use_stdin)
1254 return git_config_from_stdin(fn, data);
1255 else if (config_source && config_source->file)
1256 return git_config_from_file(fn, config_source->file, data);
1257 else if (config_source && config_source->blob)
1258 return git_config_from_blob_ref(fn, config_source->blob, data);
1259
1260 return do_git_config_sequence(fn, data);
1261 }
1262
1263 static void git_config_raw(config_fn_t fn, void *data)
1264 {
1265 if (git_config_with_options(fn, data, NULL, 1) < 0)
1266 /*
1267 * git_config_with_options() normally returns only
1268 * positive values, as most errors are fatal, and
1269 * non-fatal potential errors are guarded by "if"
1270 * statements that are entered only when no error is
1271 * possible.
1272 *
1273 * If we ever encounter a non-fatal error, it means
1274 * something went really wrong and we should stop
1275 * immediately.
1276 */
1277 die(_("unknown error occured while reading the configuration files"));
1278 }
1279
1280 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1281 {
1282 int i, value_index;
1283 struct string_list *values;
1284 struct config_set_element *entry;
1285 struct configset_list *list = &cs->list;
1286 struct key_value_info *kv_info;
1287
1288 for (i = 0; i < list->nr; i++) {
1289 entry = list->items[i].e;
1290 value_index = list->items[i].value_index;
1291 values = &entry->value_list;
1292 if (fn(entry->key, values->items[value_index].string, data) < 0) {
1293 kv_info = values->items[value_index].util;
1294 git_die_config_linenr(entry->key, kv_info->filename, kv_info->linenr);
1295 }
1296 }
1297 }
1298
1299 static void git_config_check_init(void);
1300
1301 void git_config(config_fn_t fn, void *data)
1302 {
1303 git_config_check_init();
1304 configset_iter(&the_config_set, fn, data);
1305 }
1306
1307 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1308 {
1309 struct config_set_element k;
1310 struct config_set_element *found_entry;
1311 char *normalized_key;
1312 int ret;
1313 /*
1314 * `key` may come from the user, so normalize it before using it
1315 * for querying entries from the hashmap.
1316 */
1317 ret = git_config_parse_key(key, &normalized_key, NULL);
1318
1319 if (ret)
1320 return NULL;
1321
1322 hashmap_entry_init(&k, strhash(normalized_key));
1323 k.key = normalized_key;
1324 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1325 free(normalized_key);
1326 return found_entry;
1327 }
1328
1329 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1330 {
1331 struct config_set_element *e;
1332 struct string_list_item *si;
1333 struct configset_list_item *l_item;
1334 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1335
1336 e = configset_find_element(cs, key);
1337 /*
1338 * Since the keys are being fed by git_config*() callback mechanism, they
1339 * are already normalized. So simply add them without any further munging.
1340 */
1341 if (!e) {
1342 e = xmalloc(sizeof(*e));
1343 hashmap_entry_init(e, strhash(key));
1344 e->key = xstrdup(key);
1345 string_list_init(&e->value_list, 1);
1346 hashmap_add(&cs->config_hash, e);
1347 }
1348 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1349
1350 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1351 l_item = &cs->list.items[cs->list.nr++];
1352 l_item->e = e;
1353 l_item->value_index = e->value_list.nr - 1;
1354
1355 if (cf) {
1356 kv_info->filename = strintern(cf->name);
1357 kv_info->linenr = cf->linenr;
1358 } else {
1359 /* for values read from `git_config_from_parameters()` */
1360 kv_info->filename = NULL;
1361 kv_info->linenr = -1;
1362 }
1363 si->util = kv_info;
1364
1365 return 0;
1366 }
1367
1368 static int config_set_element_cmp(const struct config_set_element *e1,
1369 const struct config_set_element *e2, const void *unused)
1370 {
1371 return strcmp(e1->key, e2->key);
1372 }
1373
1374 void git_configset_init(struct config_set *cs)
1375 {
1376 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1377 cs->hash_initialized = 1;
1378 cs->list.nr = 0;
1379 cs->list.alloc = 0;
1380 cs->list.items = NULL;
1381 }
1382
1383 void git_configset_clear(struct config_set *cs)
1384 {
1385 struct config_set_element *entry;
1386 struct hashmap_iter iter;
1387 if (!cs->hash_initialized)
1388 return;
1389
1390 hashmap_iter_init(&cs->config_hash, &iter);
1391 while ((entry = hashmap_iter_next(&iter))) {
1392 free(entry->key);
1393 string_list_clear(&entry->value_list, 1);
1394 }
1395 hashmap_free(&cs->config_hash, 1);
1396 cs->hash_initialized = 0;
1397 free(cs->list.items);
1398 cs->list.nr = 0;
1399 cs->list.alloc = 0;
1400 cs->list.items = NULL;
1401 }
1402
1403 static int config_set_callback(const char *key, const char *value, void *cb)
1404 {
1405 struct config_set *cs = cb;
1406 configset_add_value(cs, key, value);
1407 return 0;
1408 }
1409
1410 int git_configset_add_file(struct config_set *cs, const char *filename)
1411 {
1412 return git_config_from_file(config_set_callback, filename, cs);
1413 }
1414
1415 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1416 {
1417 const struct string_list *values = NULL;
1418 /*
1419 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1420 * queried key in the files of the configset, the value returned will be the last
1421 * value in the value list for that key.
1422 */
1423 values = git_configset_get_value_multi(cs, key);
1424
1425 if (!values)
1426 return 1;
1427 assert(values->nr > 0);
1428 *value = values->items[values->nr - 1].string;
1429 return 0;
1430 }
1431
1432 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1433 {
1434 struct config_set_element *e = configset_find_element(cs, key);
1435 return e ? &e->value_list : NULL;
1436 }
1437
1438 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1439 {
1440 const char *value;
1441 if (!git_configset_get_value(cs, key, &value))
1442 return git_config_string(dest, key, value);
1443 else
1444 return 1;
1445 }
1446
1447 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1448 {
1449 return git_configset_get_string_const(cs, key, (const char **)dest);
1450 }
1451
1452 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1453 {
1454 const char *value;
1455 if (!git_configset_get_value(cs, key, &value)) {
1456 *dest = git_config_int(key, value);
1457 return 0;
1458 } else
1459 return 1;
1460 }
1461
1462 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1463 {
1464 const char *value;
1465 if (!git_configset_get_value(cs, key, &value)) {
1466 *dest = git_config_ulong(key, value);
1467 return 0;
1468 } else
1469 return 1;
1470 }
1471
1472 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1473 {
1474 const char *value;
1475 if (!git_configset_get_value(cs, key, &value)) {
1476 *dest = git_config_bool(key, value);
1477 return 0;
1478 } else
1479 return 1;
1480 }
1481
1482 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1483 int *is_bool, int *dest)
1484 {
1485 const char *value;
1486 if (!git_configset_get_value(cs, key, &value)) {
1487 *dest = git_config_bool_or_int(key, value, is_bool);
1488 return 0;
1489 } else
1490 return 1;
1491 }
1492
1493 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1494 {
1495 const char *value;
1496 if (!git_configset_get_value(cs, key, &value)) {
1497 *dest = git_config_maybe_bool(key, value);
1498 if (*dest == -1)
1499 return -1;
1500 return 0;
1501 } else
1502 return 1;
1503 }
1504
1505 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1506 {
1507 const char *value;
1508 if (!git_configset_get_value(cs, key, &value))
1509 return git_config_pathname(dest, key, value);
1510 else
1511 return 1;
1512 }
1513
1514 static void git_config_check_init(void)
1515 {
1516 if (the_config_set.hash_initialized)
1517 return;
1518 git_configset_init(&the_config_set);
1519 git_config_raw(config_set_callback, &the_config_set);
1520 }
1521
1522 void git_config_clear(void)
1523 {
1524 if (!the_config_set.hash_initialized)
1525 return;
1526 git_configset_clear(&the_config_set);
1527 }
1528
1529 int git_config_get_value(const char *key, const char **value)
1530 {
1531 git_config_check_init();
1532 return git_configset_get_value(&the_config_set, key, value);
1533 }
1534
1535 const struct string_list *git_config_get_value_multi(const char *key)
1536 {
1537 git_config_check_init();
1538 return git_configset_get_value_multi(&the_config_set, key);
1539 }
1540
1541 int git_config_get_string_const(const char *key, const char **dest)
1542 {
1543 int ret;
1544 git_config_check_init();
1545 ret = git_configset_get_string_const(&the_config_set, key, dest);
1546 if (ret < 0)
1547 git_die_config(key, NULL);
1548 return ret;
1549 }
1550
1551 int git_config_get_string(const char *key, char **dest)
1552 {
1553 git_config_check_init();
1554 return git_config_get_string_const(key, (const char **)dest);
1555 }
1556
1557 int git_config_get_int(const char *key, int *dest)
1558 {
1559 git_config_check_init();
1560 return git_configset_get_int(&the_config_set, key, dest);
1561 }
1562
1563 int git_config_get_ulong(const char *key, unsigned long *dest)
1564 {
1565 git_config_check_init();
1566 return git_configset_get_ulong(&the_config_set, key, dest);
1567 }
1568
1569 int git_config_get_bool(const char *key, int *dest)
1570 {
1571 git_config_check_init();
1572 return git_configset_get_bool(&the_config_set, key, dest);
1573 }
1574
1575 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1576 {
1577 git_config_check_init();
1578 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1579 }
1580
1581 int git_config_get_maybe_bool(const char *key, int *dest)
1582 {
1583 git_config_check_init();
1584 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1585 }
1586
1587 int git_config_get_pathname(const char *key, const char **dest)
1588 {
1589 int ret;
1590 git_config_check_init();
1591 ret = git_configset_get_pathname(&the_config_set, key, dest);
1592 if (ret < 0)
1593 git_die_config(key, NULL);
1594 return ret;
1595 }
1596
1597 int git_config_get_untracked_cache(void)
1598 {
1599 int val = -1;
1600 const char *v;
1601
1602 /* Hack for test programs like test-dump-untracked-cache */
1603 if (ignore_untracked_cache_config)
1604 return -1;
1605
1606 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1607 return val;
1608
1609 if (!git_config_get_value("core.untrackedcache", &v)) {
1610 if (!strcasecmp(v, "keep"))
1611 return -1;
1612
1613 error("unknown core.untrackedCache value '%s'; "
1614 "using 'keep' default value", v);
1615 return -1;
1616 }
1617
1618 return -1; /* default value */
1619 }
1620
1621 NORETURN
1622 void git_die_config_linenr(const char *key, const char *filename, int linenr)
1623 {
1624 if (!filename)
1625 die(_("unable to parse '%s' from command-line config"), key);
1626 else
1627 die(_("bad config variable '%s' in file '%s' at line %d"),
1628 key, filename, linenr);
1629 }
1630
1631 NORETURN __attribute__((format(printf, 2, 3)))
1632 void git_die_config(const char *key, const char *err, ...)
1633 {
1634 const struct string_list *values;
1635 struct key_value_info *kv_info;
1636
1637 if (err) {
1638 va_list params;
1639 va_start(params, err);
1640 vreportf("error: ", err, params);
1641 va_end(params);
1642 }
1643 values = git_config_get_value_multi(key);
1644 kv_info = values->items[values->nr - 1].util;
1645 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
1646 }
1647
1648 /*
1649 * Find all the stuff for git_config_set() below.
1650 */
1651
1652 static struct {
1653 int baselen;
1654 char *key;
1655 int do_not_match;
1656 regex_t *value_regex;
1657 int multi_replace;
1658 size_t *offset;
1659 unsigned int offset_alloc;
1660 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1661 int seen;
1662 } store;
1663
1664 static int matches(const char *key, const char *value)
1665 {
1666 if (strcmp(key, store.key))
1667 return 0; /* not ours */
1668 if (!store.value_regex)
1669 return 1; /* always matches */
1670 if (store.value_regex == CONFIG_REGEX_NONE)
1671 return 0; /* never matches */
1672
1673 return store.do_not_match ^
1674 (value && !regexec(store.value_regex, value, 0, NULL, 0));
1675 }
1676
1677 static int store_aux(const char *key, const char *value, void *cb)
1678 {
1679 const char *ep;
1680 size_t section_len;
1681
1682 switch (store.state) {
1683 case KEY_SEEN:
1684 if (matches(key, value)) {
1685 if (store.seen == 1 && store.multi_replace == 0) {
1686 warning(_("%s has multiple values"), key);
1687 }
1688
1689 ALLOC_GROW(store.offset, store.seen + 1,
1690 store.offset_alloc);
1691
1692 store.offset[store.seen] = cf->do_ftell(cf);
1693 store.seen++;
1694 }
1695 break;
1696 case SECTION_SEEN:
1697 /*
1698 * What we are looking for is in store.key (both
1699 * section and var), and its section part is baselen
1700 * long. We found key (again, both section and var).
1701 * We would want to know if this key is in the same
1702 * section as what we are looking for. We already
1703 * know we are in the same section as what should
1704 * hold store.key.
1705 */
1706 ep = strrchr(key, '.');
1707 section_len = ep - key;
1708
1709 if ((section_len != store.baselen) ||
1710 memcmp(key, store.key, section_len+1)) {
1711 store.state = SECTION_END_SEEN;
1712 break;
1713 }
1714
1715 /*
1716 * Do not increment matches: this is no match, but we
1717 * just made sure we are in the desired section.
1718 */
1719 ALLOC_GROW(store.offset, store.seen + 1,
1720 store.offset_alloc);
1721 store.offset[store.seen] = cf->do_ftell(cf);
1722 /* fallthru */
1723 case SECTION_END_SEEN:
1724 case START:
1725 if (matches(key, value)) {
1726 ALLOC_GROW(store.offset, store.seen + 1,
1727 store.offset_alloc);
1728 store.offset[store.seen] = cf->do_ftell(cf);
1729 store.state = KEY_SEEN;
1730 store.seen++;
1731 } else {
1732 if (strrchr(key, '.') - key == store.baselen &&
1733 !strncmp(key, store.key, store.baselen)) {
1734 store.state = SECTION_SEEN;
1735 ALLOC_GROW(store.offset,
1736 store.seen + 1,
1737 store.offset_alloc);
1738 store.offset[store.seen] = cf->do_ftell(cf);
1739 }
1740 }
1741 }
1742 return 0;
1743 }
1744
1745 static int write_error(const char *filename)
1746 {
1747 error("failed to write new configuration file %s", filename);
1748
1749 /* Same error code as "failed to rename". */
1750 return 4;
1751 }
1752
1753 static int store_write_section(int fd, const char *key)
1754 {
1755 const char *dot;
1756 int i, success;
1757 struct strbuf sb = STRBUF_INIT;
1758
1759 dot = memchr(key, '.', store.baselen);
1760 if (dot) {
1761 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1762 for (i = dot - key + 1; i < store.baselen; i++) {
1763 if (key[i] == '"' || key[i] == '\\')
1764 strbuf_addch(&sb, '\\');
1765 strbuf_addch(&sb, key[i]);
1766 }
1767 strbuf_addstr(&sb, "\"]\n");
1768 } else {
1769 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1770 }
1771
1772 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1773 strbuf_release(&sb);
1774
1775 return success;
1776 }
1777
1778 static int store_write_pair(int fd, const char *key, const char *value)
1779 {
1780 int i, success;
1781 int length = strlen(key + store.baselen + 1);
1782 const char *quote = "";
1783 struct strbuf sb = STRBUF_INIT;
1784
1785 /*
1786 * Check to see if the value needs to be surrounded with a dq pair.
1787 * Note that problematic characters are always backslash-quoted; this
1788 * check is about not losing leading or trailing SP and strings that
1789 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1790 * configuration parser.
1791 */
1792 if (value[0] == ' ')
1793 quote = "\"";
1794 for (i = 0; value[i]; i++)
1795 if (value[i] == ';' || value[i] == '#')
1796 quote = "\"";
1797 if (i && value[i - 1] == ' ')
1798 quote = "\"";
1799
1800 strbuf_addf(&sb, "\t%.*s = %s",
1801 length, key + store.baselen + 1, quote);
1802
1803 for (i = 0; value[i]; i++)
1804 switch (value[i]) {
1805 case '\n':
1806 strbuf_addstr(&sb, "\\n");
1807 break;
1808 case '\t':
1809 strbuf_addstr(&sb, "\\t");
1810 break;
1811 case '"':
1812 case '\\':
1813 strbuf_addch(&sb, '\\');
1814 default:
1815 strbuf_addch(&sb, value[i]);
1816 break;
1817 }
1818 strbuf_addf(&sb, "%s\n", quote);
1819
1820 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1821 strbuf_release(&sb);
1822
1823 return success;
1824 }
1825
1826 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1827 size_t offset_, int *found_bracket)
1828 {
1829 size_t equal_offset = size, bracket_offset = size;
1830 ssize_t offset;
1831
1832 contline:
1833 for (offset = offset_-2; offset > 0
1834 && contents[offset] != '\n'; offset--)
1835 switch (contents[offset]) {
1836 case '=': equal_offset = offset; break;
1837 case ']': bracket_offset = offset; break;
1838 }
1839 if (offset > 0 && contents[offset-1] == '\\') {
1840 offset_ = offset;
1841 goto contline;
1842 }
1843 if (bracket_offset < equal_offset) {
1844 *found_bracket = 1;
1845 offset = bracket_offset+1;
1846 } else
1847 offset++;
1848
1849 return offset;
1850 }
1851
1852 int git_config_set_in_file_gently(const char *config_filename,
1853 const char *key, const char *value)
1854 {
1855 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
1856 }
1857
1858 void git_config_set_in_file(const char *config_filename,
1859 const char *key, const char *value)
1860 {
1861 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1862 }
1863
1864 int git_config_set_gently(const char *key, const char *value)
1865 {
1866 return git_config_set_multivar_gently(key, value, NULL, 0);
1867 }
1868
1869 void git_config_set(const char *key, const char *value)
1870 {
1871 git_config_set_multivar(key, value, NULL, 0);
1872 }
1873
1874 /*
1875 * Auxiliary function to sanity-check and split the key into the section
1876 * identifier and variable name.
1877 *
1878 * Returns 0 on success, -1 when there is an invalid character in the key and
1879 * -2 if there is no section name in the key.
1880 *
1881 * store_key - pointer to char* which will hold a copy of the key with
1882 * lowercase section and variable name
1883 * baselen - pointer to int which will hold the length of the
1884 * section + subsection part, can be NULL
1885 */
1886 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
1887 {
1888 int i, dot, baselen;
1889 const char *last_dot = strrchr(key, '.');
1890
1891 /*
1892 * Since "key" actually contains the section name and the real
1893 * key name separated by a dot, we have to know where the dot is.
1894 */
1895
1896 if (last_dot == NULL || last_dot == key) {
1897 if (!quiet)
1898 error("key does not contain a section: %s", key);
1899 return -CONFIG_NO_SECTION_OR_NAME;
1900 }
1901
1902 if (!last_dot[1]) {
1903 if (!quiet)
1904 error("key does not contain variable name: %s", key);
1905 return -CONFIG_NO_SECTION_OR_NAME;
1906 }
1907
1908 baselen = last_dot - key;
1909 if (baselen_)
1910 *baselen_ = baselen;
1911
1912 /*
1913 * Validate the key and while at it, lower case it for matching.
1914 */
1915 if (store_key)
1916 *store_key = xmallocz(strlen(key));
1917
1918 dot = 0;
1919 for (i = 0; key[i]; i++) {
1920 unsigned char c = key[i];
1921 if (c == '.')
1922 dot = 1;
1923 /* Leave the extended basename untouched.. */
1924 if (!dot || i > baselen) {
1925 if (!iskeychar(c) ||
1926 (i == baselen + 1 && !isalpha(c))) {
1927 if (!quiet)
1928 error("invalid key: %s", key);
1929 goto out_free_ret_1;
1930 }
1931 c = tolower(c);
1932 } else if (c == '\n') {
1933 if (!quiet)
1934 error("invalid key (newline): %s", key);
1935 goto out_free_ret_1;
1936 }
1937 if (store_key)
1938 (*store_key)[i] = c;
1939 }
1940
1941 return 0;
1942
1943 out_free_ret_1:
1944 if (store_key) {
1945 free(*store_key);
1946 *store_key = NULL;
1947 }
1948 return -CONFIG_INVALID_KEY;
1949 }
1950
1951 int git_config_parse_key(const char *key, char **store_key, int *baselen)
1952 {
1953 return git_config_parse_key_1(key, store_key, baselen, 0);
1954 }
1955
1956 int git_config_key_is_valid(const char *key)
1957 {
1958 return !git_config_parse_key_1(key, NULL, NULL, 1);
1959 }
1960
1961 /*
1962 * If value==NULL, unset in (remove from) config,
1963 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1964 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
1965 * (only add a new one)
1966 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1967 * else all matching key/values (regardless how many) are removed,
1968 * before the new pair is written.
1969 *
1970 * Returns 0 on success.
1971 *
1972 * This function does this:
1973 *
1974 * - it locks the config file by creating ".git/config.lock"
1975 *
1976 * - it then parses the config using store_aux() as validator to find
1977 * the position on the key/value pair to replace. If it is to be unset,
1978 * it must be found exactly once.
1979 *
1980 * - the config file is mmap()ed and the part before the match (if any) is
1981 * written to the lock file, then the changed part and the rest.
1982 *
1983 * - the config file is removed and the lock file rename()d to it.
1984 *
1985 */
1986 int git_config_set_multivar_in_file_gently(const char *config_filename,
1987 const char *key, const char *value,
1988 const char *value_regex,
1989 int multi_replace)
1990 {
1991 int fd = -1, in_fd = -1;
1992 int ret;
1993 struct lock_file *lock = NULL;
1994 char *filename_buf = NULL;
1995 char *contents = NULL;
1996 size_t contents_sz;
1997
1998 /* parse-key returns negative; flip the sign to feed exit(3) */
1999 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2000 if (ret)
2001 goto out_free;
2002
2003 store.multi_replace = multi_replace;
2004
2005 if (!config_filename)
2006 config_filename = filename_buf = git_pathdup("config");
2007
2008 /*
2009 * The lock serves a purpose in addition to locking: the new
2010 * contents of .git/config will be written into it.
2011 */
2012 lock = xcalloc(1, sizeof(struct lock_file));
2013 fd = hold_lock_file_for_update(lock, config_filename, 0);
2014 if (fd < 0) {
2015 error("could not lock config file %s: %s", config_filename, strerror(errno));
2016 free(store.key);
2017 ret = CONFIG_NO_LOCK;
2018 goto out_free;
2019 }
2020
2021 /*
2022 * If .git/config does not exist yet, write a minimal version.
2023 */
2024 in_fd = open(config_filename, O_RDONLY);
2025 if ( in_fd < 0 ) {
2026 free(store.key);
2027
2028 if ( ENOENT != errno ) {
2029 error("opening %s: %s", config_filename,
2030 strerror(errno));
2031 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2032 goto out_free;
2033 }
2034 /* if nothing to unset, error out */
2035 if (value == NULL) {
2036 ret = CONFIG_NOTHING_SET;
2037 goto out_free;
2038 }
2039
2040 store.key = (char *)key;
2041 if (!store_write_section(fd, key) ||
2042 !store_write_pair(fd, key, value))
2043 goto write_err_out;
2044 } else {
2045 struct stat st;
2046 size_t copy_begin, copy_end;
2047 int i, new_line = 0;
2048
2049 if (value_regex == NULL)
2050 store.value_regex = NULL;
2051 else if (value_regex == CONFIG_REGEX_NONE)
2052 store.value_regex = CONFIG_REGEX_NONE;
2053 else {
2054 if (value_regex[0] == '!') {
2055 store.do_not_match = 1;
2056 value_regex++;
2057 } else
2058 store.do_not_match = 0;
2059
2060 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2061 if (regcomp(store.value_regex, value_regex,
2062 REG_EXTENDED)) {
2063 error("invalid pattern: %s", value_regex);
2064 free(store.value_regex);
2065 ret = CONFIG_INVALID_PATTERN;
2066 goto out_free;
2067 }
2068 }
2069
2070 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2071 store.offset[0] = 0;
2072 store.state = START;
2073 store.seen = 0;
2074
2075 /*
2076 * After this, store.offset will contain the *end* offset
2077 * of the last match, or remain at 0 if no match was found.
2078 * As a side effect, we make sure to transform only a valid
2079 * existing config file.
2080 */
2081 if (git_config_from_file(store_aux, config_filename, NULL)) {
2082 error("invalid config file %s", config_filename);
2083 free(store.key);
2084 if (store.value_regex != NULL &&
2085 store.value_regex != CONFIG_REGEX_NONE) {
2086 regfree(store.value_regex);
2087 free(store.value_regex);
2088 }
2089 ret = CONFIG_INVALID_FILE;
2090 goto out_free;
2091 }
2092
2093 free(store.key);
2094 if (store.value_regex != NULL &&
2095 store.value_regex != CONFIG_REGEX_NONE) {
2096 regfree(store.value_regex);
2097 free(store.value_regex);
2098 }
2099
2100 /* if nothing to unset, or too many matches, error out */
2101 if ((store.seen == 0 && value == NULL) ||
2102 (store.seen > 1 && multi_replace == 0)) {
2103 ret = CONFIG_NOTHING_SET;
2104 goto out_free;
2105 }
2106
2107 fstat(in_fd, &st);
2108 contents_sz = xsize_t(st.st_size);
2109 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2110 MAP_PRIVATE, in_fd, 0);
2111 if (contents == MAP_FAILED) {
2112 if (errno == ENODEV && S_ISDIR(st.st_mode))
2113 errno = EISDIR;
2114 error("unable to mmap '%s': %s",
2115 config_filename, strerror(errno));
2116 ret = CONFIG_INVALID_FILE;
2117 contents = NULL;
2118 goto out_free;
2119 }
2120 close(in_fd);
2121 in_fd = -1;
2122
2123 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2124 error("chmod on %s failed: %s",
2125 get_lock_file_path(lock), strerror(errno));
2126 ret = CONFIG_NO_WRITE;
2127 goto out_free;
2128 }
2129
2130 if (store.seen == 0)
2131 store.seen = 1;
2132
2133 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2134 if (store.offset[i] == 0) {
2135 store.offset[i] = copy_end = contents_sz;
2136 } else if (store.state != KEY_SEEN) {
2137 copy_end = store.offset[i];
2138 } else
2139 copy_end = find_beginning_of_line(
2140 contents, contents_sz,
2141 store.offset[i]-2, &new_line);
2142
2143 if (copy_end > 0 && contents[copy_end-1] != '\n')
2144 new_line = 1;
2145
2146 /* write the first part of the config */
2147 if (copy_end > copy_begin) {
2148 if (write_in_full(fd, contents + copy_begin,
2149 copy_end - copy_begin) <
2150 copy_end - copy_begin)
2151 goto write_err_out;
2152 if (new_line &&
2153 write_str_in_full(fd, "\n") != 1)
2154 goto write_err_out;
2155 }
2156 copy_begin = store.offset[i];
2157 }
2158
2159 /* write the pair (value == NULL means unset) */
2160 if (value != NULL) {
2161 if (store.state == START) {
2162 if (!store_write_section(fd, key))
2163 goto write_err_out;
2164 }
2165 if (!store_write_pair(fd, key, value))
2166 goto write_err_out;
2167 }
2168
2169 /* write the rest of the config */
2170 if (copy_begin < contents_sz)
2171 if (write_in_full(fd, contents + copy_begin,
2172 contents_sz - copy_begin) <
2173 contents_sz - copy_begin)
2174 goto write_err_out;
2175
2176 munmap(contents, contents_sz);
2177 contents = NULL;
2178 }
2179
2180 if (commit_lock_file(lock) < 0) {
2181 error("could not write config file %s: %s", config_filename,
2182 strerror(errno));
2183 ret = CONFIG_NO_WRITE;
2184 lock = NULL;
2185 goto out_free;
2186 }
2187
2188 /*
2189 * lock is committed, so don't try to roll it back below.
2190 * NOTE: Since lockfile.c keeps a linked list of all created
2191 * lock_file structures, it isn't safe to free(lock). It's
2192 * better to just leave it hanging around.
2193 */
2194 lock = NULL;
2195 ret = 0;
2196
2197 /* Invalidate the config cache */
2198 git_config_clear();
2199
2200 out_free:
2201 if (lock)
2202 rollback_lock_file(lock);
2203 free(filename_buf);
2204 if (contents)
2205 munmap(contents, contents_sz);
2206 if (in_fd >= 0)
2207 close(in_fd);
2208 return ret;
2209
2210 write_err_out:
2211 ret = write_error(get_lock_file_path(lock));
2212 goto out_free;
2213
2214 }
2215
2216 void git_config_set_multivar_in_file(const char *config_filename,
2217 const char *key, const char *value,
2218 const char *value_regex, int multi_replace)
2219 {
2220 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2221 value_regex, multi_replace))
2222 return;
2223 if (value)
2224 die(_("could not set '%s' to '%s'"), key, value);
2225 else
2226 die(_("could not unset '%s'"), key);
2227 }
2228
2229 int git_config_set_multivar_gently(const char *key, const char *value,
2230 const char *value_regex, int multi_replace)
2231 {
2232 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2233 multi_replace);
2234 }
2235
2236 void git_config_set_multivar(const char *key, const char *value,
2237 const char *value_regex, int multi_replace)
2238 {
2239 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2240 multi_replace);
2241 }
2242
2243 static int section_name_match (const char *buf, const char *name)
2244 {
2245 int i = 0, j = 0, dot = 0;
2246 if (buf[i] != '[')
2247 return 0;
2248 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2249 if (!dot && isspace(buf[i])) {
2250 dot = 1;
2251 if (name[j++] != '.')
2252 break;
2253 for (i++; isspace(buf[i]); i++)
2254 ; /* do nothing */
2255 if (buf[i] != '"')
2256 break;
2257 continue;
2258 }
2259 if (buf[i] == '\\' && dot)
2260 i++;
2261 else if (buf[i] == '"' && dot) {
2262 for (i++; isspace(buf[i]); i++)
2263 ; /* do_nothing */
2264 break;
2265 }
2266 if (buf[i] != name[j++])
2267 break;
2268 }
2269 if (buf[i] == ']' && name[j] == 0) {
2270 /*
2271 * We match, now just find the right length offset by
2272 * gobbling up any whitespace after it, as well
2273 */
2274 i++;
2275 for (; buf[i] && isspace(buf[i]); i++)
2276 ; /* do nothing */
2277 return i;
2278 }
2279 return 0;
2280 }
2281
2282 static int section_name_is_ok(const char *name)
2283 {
2284 /* Empty section names are bogus. */
2285 if (!*name)
2286 return 0;
2287
2288 /*
2289 * Before a dot, we must be alphanumeric or dash. After the first dot,
2290 * anything goes, so we can stop checking.
2291 */
2292 for (; *name && *name != '.'; name++)
2293 if (*name != '-' && !isalnum(*name))
2294 return 0;
2295 return 1;
2296 }
2297
2298 /* if new_name == NULL, the section is removed instead */
2299 int git_config_rename_section_in_file(const char *config_filename,
2300 const char *old_name, const char *new_name)
2301 {
2302 int ret = 0, remove = 0;
2303 char *filename_buf = NULL;
2304 struct lock_file *lock;
2305 int out_fd;
2306 char buf[1024];
2307 FILE *config_file;
2308 struct stat st;
2309
2310 if (new_name && !section_name_is_ok(new_name)) {
2311 ret = error("invalid section name: %s", new_name);
2312 goto out;
2313 }
2314
2315 if (!config_filename)
2316 config_filename = filename_buf = git_pathdup("config");
2317
2318 lock = xcalloc(1, sizeof(struct lock_file));
2319 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2320 if (out_fd < 0) {
2321 ret = error("could not lock config file %s", config_filename);
2322 goto out;
2323 }
2324
2325 if (!(config_file = fopen(config_filename, "rb"))) {
2326 /* no config file means nothing to rename, no error */
2327 goto unlock_and_out;
2328 }
2329
2330 fstat(fileno(config_file), &st);
2331
2332 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2333 ret = error("chmod on %s failed: %s",
2334 get_lock_file_path(lock), strerror(errno));
2335 goto out;
2336 }
2337
2338 while (fgets(buf, sizeof(buf), config_file)) {
2339 int i;
2340 int length;
2341 char *output = buf;
2342 for (i = 0; buf[i] && isspace(buf[i]); i++)
2343 ; /* do nothing */
2344 if (buf[i] == '[') {
2345 /* it's a section */
2346 int offset = section_name_match(&buf[i], old_name);
2347 if (offset > 0) {
2348 ret++;
2349 if (new_name == NULL) {
2350 remove = 1;
2351 continue;
2352 }
2353 store.baselen = strlen(new_name);
2354 if (!store_write_section(out_fd, new_name)) {
2355 ret = write_error(get_lock_file_path(lock));
2356 goto out;
2357 }
2358 /*
2359 * We wrote out the new section, with
2360 * a newline, now skip the old
2361 * section's length
2362 */
2363 output += offset + i;
2364 if (strlen(output) > 0) {
2365 /*
2366 * More content means there's
2367 * a declaration to put on the
2368 * next line; indent with a
2369 * tab
2370 */
2371 output -= 1;
2372 output[0] = '\t';
2373 }
2374 }
2375 remove = 0;
2376 }
2377 if (remove)
2378 continue;
2379 length = strlen(output);
2380 if (write_in_full(out_fd, output, length) != length) {
2381 ret = write_error(get_lock_file_path(lock));
2382 goto out;
2383 }
2384 }
2385 fclose(config_file);
2386 unlock_and_out:
2387 if (commit_lock_file(lock) < 0)
2388 ret = error("could not write config file %s: %s",
2389 config_filename, strerror(errno));
2390 out:
2391 free(filename_buf);
2392 return ret;
2393 }
2394
2395 int git_config_rename_section(const char *old_name, const char *new_name)
2396 {
2397 return git_config_rename_section_in_file(NULL, old_name, new_name);
2398 }
2399
2400 /*
2401 * Call this to report error for your variable that should not
2402 * get a boolean value (i.e. "[my] var" means "true").
2403 */
2404 #undef config_error_nonbool
2405 int config_error_nonbool(const char *var)
2406 {
2407 return error("missing value for '%s'", var);
2408 }
2409
2410 int parse_config_key(const char *var,
2411 const char *section,
2412 const char **subsection, int *subsection_len,
2413 const char **key)
2414 {
2415 int section_len = strlen(section);
2416 const char *dot;
2417
2418 /* Does it start with "section." ? */
2419 if (!starts_with(var, section) || var[section_len] != '.')
2420 return -1;
2421
2422 /*
2423 * Find the key; we don't know yet if we have a subsection, but we must
2424 * parse backwards from the end, since the subsection may have dots in
2425 * it, too.
2426 */
2427 dot = strrchr(var, '.');
2428 *key = dot + 1;
2429
2430 /* Did we have a subsection at all? */
2431 if (dot == var + section_len) {
2432 *subsection = NULL;
2433 *subsection_len = 0;
2434 }
2435 else {
2436 *subsection = var + section_len + 1;
2437 *subsection_len = dot - *subsection;
2438 }
2439
2440 return 0;
2441 }
2442
2443 const char *current_config_origin_type(void)
2444 {
2445 return cf && cf->origin_type ? cf->origin_type : "command line";
2446 }
2447
2448 const char *current_config_name(void)
2449 {
2450 return cf && cf->name ? cf->name : "";
2451 }
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