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notes-merge: use O_EXCL to avoid overwriting existing files
[git.git] / config.c
blob6dbc8a409e7e6e674e399e1d9b8ef8ef3c9290b7
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) {
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 auto_crlf = AUTO_CRLF_INPUT;
807 return 0;
808 }
809 auto_crlf = git_config_bool(var, value);
810 return 0;
811 }
812
813 if (!strcmp(var, "core.safecrlf")) {
814 if (value && !strcasecmp(value, "warn")) {
815 safe_crlf = SAFE_CRLF_WARN;
816 return 0;
817 }
818 safe_crlf = git_config_bool(var, value);
819 return 0;
820 }
821
822 if (!strcmp(var, "core.eol")) {
823 if (value && !strcasecmp(value, "lf"))
824 core_eol = EOL_LF;
825 else if (value && !strcasecmp(value, "crlf"))
826 core_eol = EOL_CRLF;
827 else if (value && !strcasecmp(value, "native"))
828 core_eol = EOL_NATIVE;
829 else
830 core_eol = EOL_UNSET;
831 return 0;
832 }
833
834 if (!strcmp(var, "core.notesref")) {
835 notes_ref_name = xstrdup(value);
836 return 0;
837 }
838
839 if (!strcmp(var, "core.pager"))
840 return git_config_string(&pager_program, var, value);
841
842 if (!strcmp(var, "core.editor"))
843 return git_config_string(&editor_program, var, value);
844
845 if (!strcmp(var, "core.commentchar")) {
846 if (!value)
847 return config_error_nonbool(var);
848 else if (!strcasecmp(value, "auto"))
849 auto_comment_line_char = 1;
850 else if (value[0] && !value[1]) {
851 comment_line_char = value[0];
852 auto_comment_line_char = 0;
853 } else
854 return error("core.commentChar should only be one character");
855 return 0;
856 }
857
858 if (!strcmp(var, "core.askpass"))
859 return git_config_string(&askpass_program, var, value);
860
861 if (!strcmp(var, "core.excludesfile"))
862 return git_config_pathname(&excludes_file, var, value);
863
864 if (!strcmp(var, "core.whitespace")) {
865 if (!value)
866 return config_error_nonbool(var);
867 whitespace_rule_cfg = parse_whitespace_rule(value);
868 return 0;
869 }
870
871 if (!strcmp(var, "core.fsyncobjectfiles")) {
872 fsync_object_files = git_config_bool(var, value);
873 return 0;
874 }
875
876 if (!strcmp(var, "core.preloadindex")) {
877 core_preload_index = git_config_bool(var, value);
878 return 0;
879 }
880
881 if (!strcmp(var, "core.createobject")) {
882 if (!strcmp(value, "rename"))
883 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
884 else if (!strcmp(value, "link"))
885 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
886 else
887 die(_("invalid mode for object creation: %s"), value);
888 return 0;
889 }
890
891 if (!strcmp(var, "core.sparsecheckout")) {
892 core_apply_sparse_checkout = git_config_bool(var, value);
893 return 0;
894 }
895
896 if (!strcmp(var, "core.precomposeunicode")) {
897 precomposed_unicode = git_config_bool(var, value);
898 return 0;
899 }
900
901 if (!strcmp(var, "core.protecthfs")) {
902 protect_hfs = git_config_bool(var, value);
903 return 0;
904 }
905
906 if (!strcmp(var, "core.protectntfs")) {
907 protect_ntfs = git_config_bool(var, value);
908 return 0;
909 }
910
911 if (!strcmp(var, "core.hidedotfiles")) {
912 if (value && !strcasecmp(value, "dotgitonly"))
913 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
914 else
915 hide_dotfiles = git_config_bool(var, value);
916 return 0;
917 }
918
919 /* Add other config variables here and to Documentation/config.txt. */
920 return 0;
921 }
922
923 static int git_default_i18n_config(const char *var, const char *value)
924 {
925 if (!strcmp(var, "i18n.commitencoding"))
926 return git_config_string(&git_commit_encoding, var, value);
927
928 if (!strcmp(var, "i18n.logoutputencoding"))
929 return git_config_string(&git_log_output_encoding, var, value);
930
931 /* Add other config variables here and to Documentation/config.txt. */
932 return 0;
933 }
934
935 static int git_default_branch_config(const char *var, const char *value)
936 {
937 if (!strcmp(var, "branch.autosetupmerge")) {
938 if (value && !strcasecmp(value, "always")) {
939 git_branch_track = BRANCH_TRACK_ALWAYS;
940 return 0;
941 }
942 git_branch_track = git_config_bool(var, value);
943 return 0;
944 }
945 if (!strcmp(var, "branch.autosetuprebase")) {
946 if (!value)
947 return config_error_nonbool(var);
948 else if (!strcmp(value, "never"))
949 autorebase = AUTOREBASE_NEVER;
950 else if (!strcmp(value, "local"))
951 autorebase = AUTOREBASE_LOCAL;
952 else if (!strcmp(value, "remote"))
953 autorebase = AUTOREBASE_REMOTE;
954 else if (!strcmp(value, "always"))
955 autorebase = AUTOREBASE_ALWAYS;
956 else
957 return error("malformed value for %s", var);
958 return 0;
959 }
960
961 /* Add other config variables here and to Documentation/config.txt. */
962 return 0;
963 }
964
965 static int git_default_push_config(const char *var, const char *value)
966 {
967 if (!strcmp(var, "push.default")) {
968 if (!value)
969 return config_error_nonbool(var);
970 else if (!strcmp(value, "nothing"))
971 push_default = PUSH_DEFAULT_NOTHING;
972 else if (!strcmp(value, "matching"))
973 push_default = PUSH_DEFAULT_MATCHING;
974 else if (!strcmp(value, "simple"))
975 push_default = PUSH_DEFAULT_SIMPLE;
976 else if (!strcmp(value, "upstream"))
977 push_default = PUSH_DEFAULT_UPSTREAM;
978 else if (!strcmp(value, "tracking")) /* deprecated */
979 push_default = PUSH_DEFAULT_UPSTREAM;
980 else if (!strcmp(value, "current"))
981 push_default = PUSH_DEFAULT_CURRENT;
982 else {
983 error("malformed value for %s: %s", var, value);
984 return error("Must be one of nothing, matching, simple, "
985 "upstream or current.");
986 }
987 return 0;
988 }
989
990 /* Add other config variables here and to Documentation/config.txt. */
991 return 0;
992 }
993
994 static int git_default_mailmap_config(const char *var, const char *value)
995 {
996 if (!strcmp(var, "mailmap.file"))
997 return git_config_pathname(&git_mailmap_file, var, value);
998 if (!strcmp(var, "mailmap.blob"))
999 return git_config_string(&git_mailmap_blob, var, value);
1000
1001 /* Add other config variables here and to Documentation/config.txt. */
1002 return 0;
1003 }
1004
1005 int git_default_config(const char *var, const char *value, void *dummy)
1006 {
1007 if (starts_with(var, "core."))
1008 return git_default_core_config(var, value);
1009
1010 if (starts_with(var, "user."))
1011 return git_ident_config(var, value, dummy);
1012
1013 if (starts_with(var, "i18n."))
1014 return git_default_i18n_config(var, value);
1015
1016 if (starts_with(var, "branch."))
1017 return git_default_branch_config(var, value);
1018
1019 if (starts_with(var, "push."))
1020 return git_default_push_config(var, value);
1021
1022 if (starts_with(var, "mailmap."))
1023 return git_default_mailmap_config(var, value);
1024
1025 if (starts_with(var, "advice."))
1026 return git_default_advice_config(var, value);
1027
1028 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1029 pager_use_color = git_config_bool(var,value);
1030 return 0;
1031 }
1032
1033 if (!strcmp(var, "pack.packsizelimit")) {
1034 pack_size_limit_cfg = git_config_ulong(var, value);
1035 return 0;
1036 }
1037 /* Add other config variables here and to Documentation/config.txt. */
1038 return 0;
1039 }
1040
1041 /*
1042 * All source specific fields in the union, die_on_error, name and the callbacks
1043 * fgetc, ungetc, ftell of top need to be initialized before calling
1044 * this function.
1045 */
1046 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1047 {
1048 int ret;
1049
1050 /* push config-file parsing state stack */
1051 top->prev = cf;
1052 top->linenr = 1;
1053 top->eof = 0;
1054 strbuf_init(&top->value, 1024);
1055 strbuf_init(&top->var, 1024);
1056 cf = top;
1057
1058 ret = git_parse_source(fn, data);
1059
1060 /* pop config-file parsing state stack */
1061 strbuf_release(&top->value);
1062 strbuf_release(&top->var);
1063 cf = top->prev;
1064
1065 return ret;
1066 }
1067
1068 static int do_config_from_file(config_fn_t fn,
1069 const char *origin_type, const char *name, const char *path, FILE *f,
1070 void *data)
1071 {
1072 struct config_source top;
1073
1074 top.u.file = f;
1075 top.origin_type = origin_type;
1076 top.name = name;
1077 top.path = path;
1078 top.die_on_error = 1;
1079 top.do_fgetc = config_file_fgetc;
1080 top.do_ungetc = config_file_ungetc;
1081 top.do_ftell = config_file_ftell;
1082
1083 return do_config_from(&top, fn, data);
1084 }
1085
1086 static int git_config_from_stdin(config_fn_t fn, void *data)
1087 {
1088 return do_config_from_file(fn, "standard input", "", NULL, stdin, data);
1089 }
1090
1091 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1092 {
1093 int ret = -1;
1094 FILE *f;
1095
1096 f = fopen(filename, "r");
1097 if (f) {
1098 flockfile(f);
1099 ret = do_config_from_file(fn, "file", filename, filename, f, data);
1100 funlockfile(f);
1101 fclose(f);
1102 }
1103 return ret;
1104 }
1105
1106 int git_config_from_mem(config_fn_t fn, const char *origin_type,
1107 const char *name, const char *buf, size_t len, void *data)
1108 {
1109 struct config_source top;
1110
1111 top.u.buf.buf = buf;
1112 top.u.buf.len = len;
1113 top.u.buf.pos = 0;
1114 top.origin_type = origin_type;
1115 top.name = name;
1116 top.path = NULL;
1117 top.die_on_error = 0;
1118 top.do_fgetc = config_buf_fgetc;
1119 top.do_ungetc = config_buf_ungetc;
1120 top.do_ftell = config_buf_ftell;
1121
1122 return do_config_from(&top, fn, data);
1123 }
1124
1125 static int git_config_from_blob_sha1(config_fn_t fn,
1126 const char *name,
1127 const unsigned char *sha1,
1128 void *data)
1129 {
1130 enum object_type type;
1131 char *buf;
1132 unsigned long size;
1133 int ret;
1134
1135 buf = read_sha1_file(sha1, &type, &size);
1136 if (!buf)
1137 return error("unable to load config blob object '%s'", name);
1138 if (type != OBJ_BLOB) {
1139 free(buf);
1140 return error("reference '%s' does not point to a blob", name);
1141 }
1142
1143 ret = git_config_from_mem(fn, "blob", name, buf, size, data);
1144 free(buf);
1145
1146 return ret;
1147 }
1148
1149 static int git_config_from_blob_ref(config_fn_t fn,
1150 const char *name,
1151 void *data)
1152 {
1153 unsigned char sha1[20];
1154
1155 if (get_sha1(name, sha1) < 0)
1156 return error("unable to resolve config blob '%s'", name);
1157 return git_config_from_blob_sha1(fn, name, sha1, data);
1158 }
1159
1160 const char *git_etc_gitconfig(void)
1161 {
1162 static const char *system_wide;
1163 if (!system_wide)
1164 system_wide = system_path(ETC_GITCONFIG);
1165 return system_wide;
1166 }
1167
1168 /*
1169 * Parse environment variable 'k' as a boolean (in various
1170 * possible spellings); if missing, use the default value 'def'.
1171 */
1172 int git_env_bool(const char *k, int def)
1173 {
1174 const char *v = getenv(k);
1175 return v ? git_config_bool(k, v) : def;
1176 }
1177
1178 /*
1179 * Parse environment variable 'k' as ulong with possibly a unit
1180 * suffix; if missing, use the default value 'val'.
1181 */
1182 unsigned long git_env_ulong(const char *k, unsigned long val)
1183 {
1184 const char *v = getenv(k);
1185 if (v && !git_parse_ulong(v, &val))
1186 die("failed to parse %s", k);
1187 return val;
1188 }
1189
1190 int git_config_system(void)
1191 {
1192 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1193 }
1194
1195 static int do_git_config_sequence(config_fn_t fn, void *data)
1196 {
1197 int ret = 0, found = 0;
1198 char *xdg_config = xdg_config_home("config");
1199 char *user_config = expand_user_path("~/.gitconfig");
1200 char *repo_config = git_pathdup("config");
1201
1202 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
1203 ret += git_config_from_file(fn, git_etc_gitconfig(),
1204 data);
1205 found += 1;
1206 }
1207
1208 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
1209 ret += git_config_from_file(fn, xdg_config, data);
1210 found += 1;
1211 }
1212
1213 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
1214 ret += git_config_from_file(fn, user_config, data);
1215 found += 1;
1216 }
1217
1218 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
1219 ret += git_config_from_file(fn, repo_config, data);
1220 found += 1;
1221 }
1222
1223 switch (git_config_from_parameters(fn, data)) {
1224 case -1: /* error */
1225 die(_("unable to parse command-line config"));
1226 break;
1227 case 0: /* found nothing */
1228 break;
1229 default: /* found at least one item */
1230 found++;
1231 break;
1232 }
1233
1234 free(xdg_config);
1235 free(user_config);
1236 free(repo_config);
1237 return ret == 0 ? found : ret;
1238 }
1239
1240 int git_config_with_options(config_fn_t fn, void *data,
1241 struct git_config_source *config_source,
1242 int respect_includes)
1243 {
1244 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1245
1246 if (respect_includes) {
1247 inc.fn = fn;
1248 inc.data = data;
1249 fn = git_config_include;
1250 data = &inc;
1251 }
1252
1253 /*
1254 * If we have a specific filename, use it. Otherwise, follow the
1255 * regular lookup sequence.
1256 */
1257 if (config_source && config_source->use_stdin)
1258 return git_config_from_stdin(fn, data);
1259 else if (config_source && config_source->file)
1260 return git_config_from_file(fn, config_source->file, data);
1261 else if (config_source && config_source->blob)
1262 return git_config_from_blob_ref(fn, config_source->blob, data);
1263
1264 return do_git_config_sequence(fn, data);
1265 }
1266
1267 static void git_config_raw(config_fn_t fn, void *data)
1268 {
1269 if (git_config_with_options(fn, data, NULL, 1) < 0)
1270 /*
1271 * git_config_with_options() normally returns only
1272 * positive values, as most errors are fatal, and
1273 * non-fatal potential errors are guarded by "if"
1274 * statements that are entered only when no error is
1275 * possible.
1276 *
1277 * If we ever encounter a non-fatal error, it means
1278 * something went really wrong and we should stop
1279 * immediately.
1280 */
1281 die(_("unknown error occured while reading the configuration files"));
1282 }
1283
1284 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1285 {
1286 int i, value_index;
1287 struct string_list *values;
1288 struct config_set_element *entry;
1289 struct configset_list *list = &cs->list;
1290 struct key_value_info *kv_info;
1291
1292 for (i = 0; i < list->nr; i++) {
1293 entry = list->items[i].e;
1294 value_index = list->items[i].value_index;
1295 values = &entry->value_list;
1296 if (fn(entry->key, values->items[value_index].string, data) < 0) {
1297 kv_info = values->items[value_index].util;
1298 git_die_config_linenr(entry->key, kv_info->filename, kv_info->linenr);
1299 }
1300 }
1301 }
1302
1303 static void git_config_check_init(void);
1304
1305 void git_config(config_fn_t fn, void *data)
1306 {
1307 git_config_check_init();
1308 configset_iter(&the_config_set, fn, data);
1309 }
1310
1311 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1312 {
1313 struct config_set_element k;
1314 struct config_set_element *found_entry;
1315 char *normalized_key;
1316 /*
1317 * `key` may come from the user, so normalize it before using it
1318 * for querying entries from the hashmap.
1319 */
1320 if (git_config_parse_key(key, &normalized_key, NULL))
1321 return NULL;
1322
1323 hashmap_entry_init(&k, strhash(normalized_key));
1324 k.key = normalized_key;
1325 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1326 free(normalized_key);
1327 return found_entry;
1328 }
1329
1330 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1331 {
1332 struct config_set_element *e;
1333 struct string_list_item *si;
1334 struct configset_list_item *l_item;
1335 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1336
1337 e = configset_find_element(cs, key);
1338 /*
1339 * Since the keys are being fed by git_config*() callback mechanism, they
1340 * are already normalized. So simply add them without any further munging.
1341 */
1342 if (!e) {
1343 e = xmalloc(sizeof(*e));
1344 hashmap_entry_init(e, strhash(key));
1345 e->key = xstrdup(key);
1346 string_list_init(&e->value_list, 1);
1347 hashmap_add(&cs->config_hash, e);
1348 }
1349 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1350
1351 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1352 l_item = &cs->list.items[cs->list.nr++];
1353 l_item->e = e;
1354 l_item->value_index = e->value_list.nr - 1;
1355
1356 if (cf) {
1357 kv_info->filename = strintern(cf->name);
1358 kv_info->linenr = cf->linenr;
1359 } else {
1360 /* for values read from `git_config_from_parameters()` */
1361 kv_info->filename = NULL;
1362 kv_info->linenr = -1;
1363 }
1364 si->util = kv_info;
1365
1366 return 0;
1367 }
1368
1369 static int config_set_element_cmp(const struct config_set_element *e1,
1370 const struct config_set_element *e2, const void *unused)
1371 {
1372 return strcmp(e1->key, e2->key);
1373 }
1374
1375 void git_configset_init(struct config_set *cs)
1376 {
1377 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1378 cs->hash_initialized = 1;
1379 cs->list.nr = 0;
1380 cs->list.alloc = 0;
1381 cs->list.items = NULL;
1382 }
1383
1384 void git_configset_clear(struct config_set *cs)
1385 {
1386 struct config_set_element *entry;
1387 struct hashmap_iter iter;
1388 if (!cs->hash_initialized)
1389 return;
1390
1391 hashmap_iter_init(&cs->config_hash, &iter);
1392 while ((entry = hashmap_iter_next(&iter))) {
1393 free(entry->key);
1394 string_list_clear(&entry->value_list, 1);
1395 }
1396 hashmap_free(&cs->config_hash, 1);
1397 cs->hash_initialized = 0;
1398 free(cs->list.items);
1399 cs->list.nr = 0;
1400 cs->list.alloc = 0;
1401 cs->list.items = NULL;
1402 }
1403
1404 static int config_set_callback(const char *key, const char *value, void *cb)
1405 {
1406 struct config_set *cs = cb;
1407 configset_add_value(cs, key, value);
1408 return 0;
1409 }
1410
1411 int git_configset_add_file(struct config_set *cs, const char *filename)
1412 {
1413 return git_config_from_file(config_set_callback, filename, cs);
1414 }
1415
1416 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1417 {
1418 const struct string_list *values = NULL;
1419 /*
1420 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1421 * queried key in the files of the configset, the value returned will be the last
1422 * value in the value list for that key.
1423 */
1424 values = git_configset_get_value_multi(cs, key);
1425
1426 if (!values)
1427 return 1;
1428 assert(values->nr > 0);
1429 *value = values->items[values->nr - 1].string;
1430 return 0;
1431 }
1432
1433 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1434 {
1435 struct config_set_element *e = configset_find_element(cs, key);
1436 return e ? &e->value_list : NULL;
1437 }
1438
1439 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1440 {
1441 const char *value;
1442 if (!git_configset_get_value(cs, key, &value))
1443 return git_config_string(dest, key, value);
1444 else
1445 return 1;
1446 }
1447
1448 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1449 {
1450 return git_configset_get_string_const(cs, key, (const char **)dest);
1451 }
1452
1453 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1454 {
1455 const char *value;
1456 if (!git_configset_get_value(cs, key, &value)) {
1457 *dest = git_config_int(key, value);
1458 return 0;
1459 } else
1460 return 1;
1461 }
1462
1463 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1464 {
1465 const char *value;
1466 if (!git_configset_get_value(cs, key, &value)) {
1467 *dest = git_config_ulong(key, value);
1468 return 0;
1469 } else
1470 return 1;
1471 }
1472
1473 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1474 {
1475 const char *value;
1476 if (!git_configset_get_value(cs, key, &value)) {
1477 *dest = git_config_bool(key, value);
1478 return 0;
1479 } else
1480 return 1;
1481 }
1482
1483 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1484 int *is_bool, int *dest)
1485 {
1486 const char *value;
1487 if (!git_configset_get_value(cs, key, &value)) {
1488 *dest = git_config_bool_or_int(key, value, is_bool);
1489 return 0;
1490 } else
1491 return 1;
1492 }
1493
1494 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1495 {
1496 const char *value;
1497 if (!git_configset_get_value(cs, key, &value)) {
1498 *dest = git_config_maybe_bool(key, value);
1499 if (*dest == -1)
1500 return -1;
1501 return 0;
1502 } else
1503 return 1;
1504 }
1505
1506 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1507 {
1508 const char *value;
1509 if (!git_configset_get_value(cs, key, &value))
1510 return git_config_pathname(dest, key, value);
1511 else
1512 return 1;
1513 }
1514
1515 static void git_config_check_init(void)
1516 {
1517 if (the_config_set.hash_initialized)
1518 return;
1519 git_configset_init(&the_config_set);
1520 git_config_raw(config_set_callback, &the_config_set);
1521 }
1522
1523 void git_config_clear(void)
1524 {
1525 if (!the_config_set.hash_initialized)
1526 return;
1527 git_configset_clear(&the_config_set);
1528 }
1529
1530 int git_config_get_value(const char *key, const char **value)
1531 {
1532 git_config_check_init();
1533 return git_configset_get_value(&the_config_set, key, value);
1534 }
1535
1536 const struct string_list *git_config_get_value_multi(const char *key)
1537 {
1538 git_config_check_init();
1539 return git_configset_get_value_multi(&the_config_set, key);
1540 }
1541
1542 int git_config_get_string_const(const char *key, const char **dest)
1543 {
1544 int ret;
1545 git_config_check_init();
1546 ret = git_configset_get_string_const(&the_config_set, key, dest);
1547 if (ret < 0)
1548 git_die_config(key, NULL);
1549 return ret;
1550 }
1551
1552 int git_config_get_string(const char *key, char **dest)
1553 {
1554 git_config_check_init();
1555 return git_config_get_string_const(key, (const char **)dest);
1556 }
1557
1558 int git_config_get_int(const char *key, int *dest)
1559 {
1560 git_config_check_init();
1561 return git_configset_get_int(&the_config_set, key, dest);
1562 }
1563
1564 int git_config_get_ulong(const char *key, unsigned long *dest)
1565 {
1566 git_config_check_init();
1567 return git_configset_get_ulong(&the_config_set, key, dest);
1568 }
1569
1570 int git_config_get_bool(const char *key, int *dest)
1571 {
1572 git_config_check_init();
1573 return git_configset_get_bool(&the_config_set, key, dest);
1574 }
1575
1576 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1577 {
1578 git_config_check_init();
1579 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1580 }
1581
1582 int git_config_get_maybe_bool(const char *key, int *dest)
1583 {
1584 git_config_check_init();
1585 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1586 }
1587
1588 int git_config_get_pathname(const char *key, const char **dest)
1589 {
1590 int ret;
1591 git_config_check_init();
1592 ret = git_configset_get_pathname(&the_config_set, key, dest);
1593 if (ret < 0)
1594 git_die_config(key, NULL);
1595 return ret;
1596 }
1597
1598 int git_config_get_untracked_cache(void)
1599 {
1600 int val = -1;
1601 const char *v;
1602
1603 /* Hack for test programs like test-dump-untracked-cache */
1604 if (ignore_untracked_cache_config)
1605 return -1;
1606
1607 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1608 return val;
1609
1610 if (!git_config_get_value("core.untrackedcache", &v)) {
1611 if (!strcasecmp(v, "keep"))
1612 return -1;
1613
1614 error("unknown core.untrackedCache value '%s'; "
1615 "using 'keep' default value", v);
1616 return -1;
1617 }
1618
1619 return -1; /* default value */
1620 }
1621
1622 NORETURN
1623 void git_die_config_linenr(const char *key, const char *filename, int linenr)
1624 {
1625 if (!filename)
1626 die(_("unable to parse '%s' from command-line config"), key);
1627 else
1628 die(_("bad config variable '%s' in file '%s' at line %d"),
1629 key, filename, linenr);
1630 }
1631
1632 NORETURN __attribute__((format(printf, 2, 3)))
1633 void git_die_config(const char *key, const char *err, ...)
1634 {
1635 const struct string_list *values;
1636 struct key_value_info *kv_info;
1637
1638 if (err) {
1639 va_list params;
1640 va_start(params, err);
1641 vreportf("error: ", err, params);
1642 va_end(params);
1643 }
1644 values = git_config_get_value_multi(key);
1645 kv_info = values->items[values->nr - 1].util;
1646 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
1647 }
1648
1649 /*
1650 * Find all the stuff for git_config_set() below.
1651 */
1652
1653 static struct {
1654 int baselen;
1655 char *key;
1656 int do_not_match;
1657 regex_t *value_regex;
1658 int multi_replace;
1659 size_t *offset;
1660 unsigned int offset_alloc;
1661 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1662 int seen;
1663 } store;
1664
1665 static int matches(const char *key, const char *value)
1666 {
1667 if (strcmp(key, store.key))
1668 return 0; /* not ours */
1669 if (!store.value_regex)
1670 return 1; /* always matches */
1671 if (store.value_regex == CONFIG_REGEX_NONE)
1672 return 0; /* never matches */
1673
1674 return store.do_not_match ^
1675 (value && !regexec(store.value_regex, value, 0, NULL, 0));
1676 }
1677
1678 static int store_aux(const char *key, const char *value, void *cb)
1679 {
1680 const char *ep;
1681 size_t section_len;
1682
1683 switch (store.state) {
1684 case KEY_SEEN:
1685 if (matches(key, value)) {
1686 if (store.seen == 1 && store.multi_replace == 0) {
1687 warning(_("%s has multiple values"), key);
1688 }
1689
1690 ALLOC_GROW(store.offset, store.seen + 1,
1691 store.offset_alloc);
1692
1693 store.offset[store.seen] = cf->do_ftell(cf);
1694 store.seen++;
1695 }
1696 break;
1697 case SECTION_SEEN:
1698 /*
1699 * What we are looking for is in store.key (both
1700 * section and var), and its section part is baselen
1701 * long. We found key (again, both section and var).
1702 * We would want to know if this key is in the same
1703 * section as what we are looking for. We already
1704 * know we are in the same section as what should
1705 * hold store.key.
1706 */
1707 ep = strrchr(key, '.');
1708 section_len = ep - key;
1709
1710 if ((section_len != store.baselen) ||
1711 memcmp(key, store.key, section_len+1)) {
1712 store.state = SECTION_END_SEEN;
1713 break;
1714 }
1715
1716 /*
1717 * Do not increment matches: this is no match, but we
1718 * just made sure we are in the desired section.
1719 */
1720 ALLOC_GROW(store.offset, store.seen + 1,
1721 store.offset_alloc);
1722 store.offset[store.seen] = cf->do_ftell(cf);
1723 /* fallthru */
1724 case SECTION_END_SEEN:
1725 case START:
1726 if (matches(key, value)) {
1727 ALLOC_GROW(store.offset, store.seen + 1,
1728 store.offset_alloc);
1729 store.offset[store.seen] = cf->do_ftell(cf);
1730 store.state = KEY_SEEN;
1731 store.seen++;
1732 } else {
1733 if (strrchr(key, '.') - key == store.baselen &&
1734 !strncmp(key, store.key, store.baselen)) {
1735 store.state = SECTION_SEEN;
1736 ALLOC_GROW(store.offset,
1737 store.seen + 1,
1738 store.offset_alloc);
1739 store.offset[store.seen] = cf->do_ftell(cf);
1740 }
1741 }
1742 }
1743 return 0;
1744 }
1745
1746 static int write_error(const char *filename)
1747 {
1748 error("failed to write new configuration file %s", filename);
1749
1750 /* Same error code as "failed to rename". */
1751 return 4;
1752 }
1753
1754 static int store_write_section(int fd, const char *key)
1755 {
1756 const char *dot;
1757 int i, success;
1758 struct strbuf sb = STRBUF_INIT;
1759
1760 dot = memchr(key, '.', store.baselen);
1761 if (dot) {
1762 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1763 for (i = dot - key + 1; i < store.baselen; i++) {
1764 if (key[i] == '"' || key[i] == '\\')
1765 strbuf_addch(&sb, '\\');
1766 strbuf_addch(&sb, key[i]);
1767 }
1768 strbuf_addstr(&sb, "\"]\n");
1769 } else {
1770 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1771 }
1772
1773 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1774 strbuf_release(&sb);
1775
1776 return success;
1777 }
1778
1779 static int store_write_pair(int fd, const char *key, const char *value)
1780 {
1781 int i, success;
1782 int length = strlen(key + store.baselen + 1);
1783 const char *quote = "";
1784 struct strbuf sb = STRBUF_INIT;
1785
1786 /*
1787 * Check to see if the value needs to be surrounded with a dq pair.
1788 * Note that problematic characters are always backslash-quoted; this
1789 * check is about not losing leading or trailing SP and strings that
1790 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1791 * configuration parser.
1792 */
1793 if (value[0] == ' ')
1794 quote = "\"";
1795 for (i = 0; value[i]; i++)
1796 if (value[i] == ';' || value[i] == '#')
1797 quote = "\"";
1798 if (i && value[i - 1] == ' ')
1799 quote = "\"";
1800
1801 strbuf_addf(&sb, "\t%.*s = %s",
1802 length, key + store.baselen + 1, quote);
1803
1804 for (i = 0; value[i]; i++)
1805 switch (value[i]) {
1806 case '\n':
1807 strbuf_addstr(&sb, "\\n");
1808 break;
1809 case '\t':
1810 strbuf_addstr(&sb, "\\t");
1811 break;
1812 case '"':
1813 case '\\':
1814 strbuf_addch(&sb, '\\');
1815 default:
1816 strbuf_addch(&sb, value[i]);
1817 break;
1818 }
1819 strbuf_addf(&sb, "%s\n", quote);
1820
1821 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1822 strbuf_release(&sb);
1823
1824 return success;
1825 }
1826
1827 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1828 size_t offset_, int *found_bracket)
1829 {
1830 size_t equal_offset = size, bracket_offset = size;
1831 ssize_t offset;
1832
1833 contline:
1834 for (offset = offset_-2; offset > 0
1835 && contents[offset] != '\n'; offset--)
1836 switch (contents[offset]) {
1837 case '=': equal_offset = offset; break;
1838 case ']': bracket_offset = offset; break;
1839 }
1840 if (offset > 0 && contents[offset-1] == '\\') {
1841 offset_ = offset;
1842 goto contline;
1843 }
1844 if (bracket_offset < equal_offset) {
1845 *found_bracket = 1;
1846 offset = bracket_offset+1;
1847 } else
1848 offset++;
1849
1850 return offset;
1851 }
1852
1853 int git_config_set_in_file_gently(const char *config_filename,
1854 const char *key, const char *value)
1855 {
1856 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
1857 }
1858
1859 void git_config_set_in_file(const char *config_filename,
1860 const char *key, const char *value)
1861 {
1862 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1863 }
1864
1865 int git_config_set_gently(const char *key, const char *value)
1866 {
1867 return git_config_set_multivar_gently(key, value, NULL, 0);
1868 }
1869
1870 void git_config_set(const char *key, const char *value)
1871 {
1872 git_config_set_multivar(key, value, NULL, 0);
1873 }
1874
1875 /*
1876 * Auxiliary function to sanity-check and split the key into the section
1877 * identifier and variable name.
1878 *
1879 * Returns 0 on success, -1 when there is an invalid character in the key and
1880 * -2 if there is no section name in the key.
1881 *
1882 * store_key - pointer to char* which will hold a copy of the key with
1883 * lowercase section and variable name
1884 * baselen - pointer to int which will hold the length of the
1885 * section + subsection part, can be NULL
1886 */
1887 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
1888 {
1889 int i, dot, baselen;
1890 const char *last_dot = strrchr(key, '.');
1891
1892 /*
1893 * Since "key" actually contains the section name and the real
1894 * key name separated by a dot, we have to know where the dot is.
1895 */
1896
1897 if (last_dot == NULL || last_dot == key) {
1898 if (!quiet)
1899 error("key does not contain a section: %s", key);
1900 return -CONFIG_NO_SECTION_OR_NAME;
1901 }
1902
1903 if (!last_dot[1]) {
1904 if (!quiet)
1905 error("key does not contain variable name: %s", key);
1906 return -CONFIG_NO_SECTION_OR_NAME;
1907 }
1908
1909 baselen = last_dot - key;
1910 if (baselen_)
1911 *baselen_ = baselen;
1912
1913 /*
1914 * Validate the key and while at it, lower case it for matching.
1915 */
1916 if (store_key)
1917 *store_key = xmallocz(strlen(key));
1918
1919 dot = 0;
1920 for (i = 0; key[i]; i++) {
1921 unsigned char c = key[i];
1922 if (c == '.')
1923 dot = 1;
1924 /* Leave the extended basename untouched.. */
1925 if (!dot || i > baselen) {
1926 if (!iskeychar(c) ||
1927 (i == baselen + 1 && !isalpha(c))) {
1928 if (!quiet)
1929 error("invalid key: %s", key);
1930 goto out_free_ret_1;
1931 }
1932 c = tolower(c);
1933 } else if (c == '\n') {
1934 if (!quiet)
1935 error("invalid key (newline): %s", key);
1936 goto out_free_ret_1;
1937 }
1938 if (store_key)
1939 (*store_key)[i] = c;
1940 }
1941
1942 return 0;
1943
1944 out_free_ret_1:
1945 if (store_key) {
1946 free(*store_key);
1947 *store_key = NULL;
1948 }
1949 return -CONFIG_INVALID_KEY;
1950 }
1951
1952 int git_config_parse_key(const char *key, char **store_key, int *baselen)
1953 {
1954 return git_config_parse_key_1(key, store_key, baselen, 0);
1955 }
1956
1957 int git_config_key_is_valid(const char *key)
1958 {
1959 return !git_config_parse_key_1(key, NULL, NULL, 1);
1960 }
1961
1962 /*
1963 * If value==NULL, unset in (remove from) config,
1964 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1965 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
1966 * (only add a new one)
1967 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1968 * else all matching key/values (regardless how many) are removed,
1969 * before the new pair is written.
1970 *
1971 * Returns 0 on success.
1972 *
1973 * This function does this:
1974 *
1975 * - it locks the config file by creating ".git/config.lock"
1976 *
1977 * - it then parses the config using store_aux() as validator to find
1978 * the position on the key/value pair to replace. If it is to be unset,
1979 * it must be found exactly once.
1980 *
1981 * - the config file is mmap()ed and the part before the match (if any) is
1982 * written to the lock file, then the changed part and the rest.
1983 *
1984 * - the config file is removed and the lock file rename()d to it.
1985 *
1986 */
1987 int git_config_set_multivar_in_file_gently(const char *config_filename,
1988 const char *key, const char *value,
1989 const char *value_regex,
1990 int multi_replace)
1991 {
1992 int fd = -1, in_fd = -1;
1993 int ret;
1994 struct lock_file *lock = NULL;
1995 char *filename_buf = NULL;
1996 char *contents = NULL;
1997 size_t contents_sz;
1998
1999 /* parse-key returns negative; flip the sign to feed exit(3) */
2000 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2001 if (ret)
2002 goto out_free;
2003
2004 store.multi_replace = multi_replace;
2005
2006 if (!config_filename)
2007 config_filename = filename_buf = git_pathdup("config");
2008
2009 /*
2010 * The lock serves a purpose in addition to locking: the new
2011 * contents of .git/config will be written into it.
2012 */
2013 lock = xcalloc(1, sizeof(struct lock_file));
2014 fd = hold_lock_file_for_update(lock, config_filename, 0);
2015 if (fd < 0) {
2016 error("could not lock config file %s: %s", config_filename, strerror(errno));
2017 free(store.key);
2018 ret = CONFIG_NO_LOCK;
2019 goto out_free;
2020 }
2021
2022 /*
2023 * If .git/config does not exist yet, write a minimal version.
2024 */
2025 in_fd = open(config_filename, O_RDONLY);
2026 if ( in_fd < 0 ) {
2027 free(store.key);
2028
2029 if ( ENOENT != errno ) {
2030 error("opening %s: %s", config_filename,
2031 strerror(errno));
2032 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2033 goto out_free;
2034 }
2035 /* if nothing to unset, error out */
2036 if (value == NULL) {
2037 ret = CONFIG_NOTHING_SET;
2038 goto out_free;
2039 }
2040
2041 store.key = (char *)key;
2042 if (!store_write_section(fd, key) ||
2043 !store_write_pair(fd, key, value))
2044 goto write_err_out;
2045 } else {
2046 struct stat st;
2047 size_t copy_begin, copy_end;
2048 int i, new_line = 0;
2049
2050 if (value_regex == NULL)
2051 store.value_regex = NULL;
2052 else if (value_regex == CONFIG_REGEX_NONE)
2053 store.value_regex = CONFIG_REGEX_NONE;
2054 else {
2055 if (value_regex[0] == '!') {
2056 store.do_not_match = 1;
2057 value_regex++;
2058 } else
2059 store.do_not_match = 0;
2060
2061 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2062 if (regcomp(store.value_regex, value_regex,
2063 REG_EXTENDED)) {
2064 error("invalid pattern: %s", value_regex);
2065 free(store.value_regex);
2066 ret = CONFIG_INVALID_PATTERN;
2067 goto out_free;
2068 }
2069 }
2070
2071 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2072 store.offset[0] = 0;
2073 store.state = START;
2074 store.seen = 0;
2075
2076 /*
2077 * After this, store.offset will contain the *end* offset
2078 * of the last match, or remain at 0 if no match was found.
2079 * As a side effect, we make sure to transform only a valid
2080 * existing config file.
2081 */
2082 if (git_config_from_file(store_aux, config_filename, NULL)) {
2083 error("invalid config file %s", config_filename);
2084 free(store.key);
2085 if (store.value_regex != NULL &&
2086 store.value_regex != CONFIG_REGEX_NONE) {
2087 regfree(store.value_regex);
2088 free(store.value_regex);
2089 }
2090 ret = CONFIG_INVALID_FILE;
2091 goto out_free;
2092 }
2093
2094 free(store.key);
2095 if (store.value_regex != NULL &&
2096 store.value_regex != CONFIG_REGEX_NONE) {
2097 regfree(store.value_regex);
2098 free(store.value_regex);
2099 }
2100
2101 /* if nothing to unset, or too many matches, error out */
2102 if ((store.seen == 0 && value == NULL) ||
2103 (store.seen > 1 && multi_replace == 0)) {
2104 ret = CONFIG_NOTHING_SET;
2105 goto out_free;
2106 }
2107
2108 fstat(in_fd, &st);
2109 contents_sz = xsize_t(st.st_size);
2110 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2111 MAP_PRIVATE, in_fd, 0);
2112 if (contents == MAP_FAILED) {
2113 if (errno == ENODEV && S_ISDIR(st.st_mode))
2114 errno = EISDIR;
2115 error("unable to mmap '%s': %s",
2116 config_filename, strerror(errno));
2117 ret = CONFIG_INVALID_FILE;
2118 contents = NULL;
2119 goto out_free;
2120 }
2121 close(in_fd);
2122 in_fd = -1;
2123
2124 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2125 error("chmod on %s failed: %s",
2126 get_lock_file_path(lock), strerror(errno));
2127 ret = CONFIG_NO_WRITE;
2128 goto out_free;
2129 }
2130
2131 if (store.seen == 0)
2132 store.seen = 1;
2133
2134 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2135 if (store.offset[i] == 0) {
2136 store.offset[i] = copy_end = contents_sz;
2137 } else if (store.state != KEY_SEEN) {
2138 copy_end = store.offset[i];
2139 } else
2140 copy_end = find_beginning_of_line(
2141 contents, contents_sz,
2142 store.offset[i]-2, &new_line);
2143
2144 if (copy_end > 0 && contents[copy_end-1] != '\n')
2145 new_line = 1;
2146
2147 /* write the first part of the config */
2148 if (copy_end > copy_begin) {
2149 if (write_in_full(fd, contents + copy_begin,
2150 copy_end - copy_begin) <
2151 copy_end - copy_begin)
2152 goto write_err_out;
2153 if (new_line &&
2154 write_str_in_full(fd, "\n") != 1)
2155 goto write_err_out;
2156 }
2157 copy_begin = store.offset[i];
2158 }
2159
2160 /* write the pair (value == NULL means unset) */
2161 if (value != NULL) {
2162 if (store.state == START) {
2163 if (!store_write_section(fd, key))
2164 goto write_err_out;
2165 }
2166 if (!store_write_pair(fd, key, value))
2167 goto write_err_out;
2168 }
2169
2170 /* write the rest of the config */
2171 if (copy_begin < contents_sz)
2172 if (write_in_full(fd, contents + copy_begin,
2173 contents_sz - copy_begin) <
2174 contents_sz - copy_begin)
2175 goto write_err_out;
2176
2177 munmap(contents, contents_sz);
2178 contents = NULL;
2179 }
2180
2181 if (commit_lock_file(lock) < 0) {
2182 error("could not write config file %s: %s", config_filename,
2183 strerror(errno));
2184 ret = CONFIG_NO_WRITE;
2185 lock = NULL;
2186 goto out_free;
2187 }
2188
2189 /*
2190 * lock is committed, so don't try to roll it back below.
2191 * NOTE: Since lockfile.c keeps a linked list of all created
2192 * lock_file structures, it isn't safe to free(lock). It's
2193 * better to just leave it hanging around.
2194 */
2195 lock = NULL;
2196 ret = 0;
2197
2198 /* Invalidate the config cache */
2199 git_config_clear();
2200
2201 out_free:
2202 if (lock)
2203 rollback_lock_file(lock);
2204 free(filename_buf);
2205 if (contents)
2206 munmap(contents, contents_sz);
2207 if (in_fd >= 0)
2208 close(in_fd);
2209 return ret;
2210
2211 write_err_out:
2212 ret = write_error(get_lock_file_path(lock));
2213 goto out_free;
2214
2215 }
2216
2217 void git_config_set_multivar_in_file(const char *config_filename,
2218 const char *key, const char *value,
2219 const char *value_regex, int multi_replace)
2220 {
2221 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2222 value_regex, multi_replace))
2223 return;
2224 if (value)
2225 die(_("could not set '%s' to '%s'"), key, value);
2226 else
2227 die(_("could not unset '%s'"), key);
2228 }
2229
2230 int git_config_set_multivar_gently(const char *key, const char *value,
2231 const char *value_regex, int multi_replace)
2232 {
2233 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2234 multi_replace);
2235 }
2236
2237 void git_config_set_multivar(const char *key, const char *value,
2238 const char *value_regex, int multi_replace)
2239 {
2240 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2241 multi_replace);
2242 }
2243
2244 static int section_name_match (const char *buf, const char *name)
2245 {
2246 int i = 0, j = 0, dot = 0;
2247 if (buf[i] != '[')
2248 return 0;
2249 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2250 if (!dot && isspace(buf[i])) {
2251 dot = 1;
2252 if (name[j++] != '.')
2253 break;
2254 for (i++; isspace(buf[i]); i++)
2255 ; /* do nothing */
2256 if (buf[i] != '"')
2257 break;
2258 continue;
2259 }
2260 if (buf[i] == '\\' && dot)
2261 i++;
2262 else if (buf[i] == '"' && dot) {
2263 for (i++; isspace(buf[i]); i++)
2264 ; /* do_nothing */
2265 break;
2266 }
2267 if (buf[i] != name[j++])
2268 break;
2269 }
2270 if (buf[i] == ']' && name[j] == 0) {
2271 /*
2272 * We match, now just find the right length offset by
2273 * gobbling up any whitespace after it, as well
2274 */
2275 i++;
2276 for (; buf[i] && isspace(buf[i]); i++)
2277 ; /* do nothing */
2278 return i;
2279 }
2280 return 0;
2281 }
2282
2283 static int section_name_is_ok(const char *name)
2284 {
2285 /* Empty section names are bogus. */
2286 if (!*name)
2287 return 0;
2288
2289 /*
2290 * Before a dot, we must be alphanumeric or dash. After the first dot,
2291 * anything goes, so we can stop checking.
2292 */
2293 for (; *name && *name != '.'; name++)
2294 if (*name != '-' && !isalnum(*name))
2295 return 0;
2296 return 1;
2297 }
2298
2299 /* if new_name == NULL, the section is removed instead */
2300 int git_config_rename_section_in_file(const char *config_filename,
2301 const char *old_name, const char *new_name)
2302 {
2303 int ret = 0, remove = 0;
2304 char *filename_buf = NULL;
2305 struct lock_file *lock;
2306 int out_fd;
2307 char buf[1024];
2308 FILE *config_file;
2309 struct stat st;
2310
2311 if (new_name && !section_name_is_ok(new_name)) {
2312 ret = error("invalid section name: %s", new_name);
2313 goto out;
2314 }
2315
2316 if (!config_filename)
2317 config_filename = filename_buf = git_pathdup("config");
2318
2319 lock = xcalloc(1, sizeof(struct lock_file));
2320 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2321 if (out_fd < 0) {
2322 ret = error("could not lock config file %s", config_filename);
2323 goto out;
2324 }
2325
2326 if (!(config_file = fopen(config_filename, "rb"))) {
2327 /* no config file means nothing to rename, no error */
2328 goto unlock_and_out;
2329 }
2330
2331 fstat(fileno(config_file), &st);
2332
2333 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2334 ret = error("chmod on %s failed: %s",
2335 get_lock_file_path(lock), strerror(errno));
2336 goto out;
2337 }
2338
2339 while (fgets(buf, sizeof(buf), config_file)) {
2340 int i;
2341 int length;
2342 char *output = buf;
2343 for (i = 0; buf[i] && isspace(buf[i]); i++)
2344 ; /* do nothing */
2345 if (buf[i] == '[') {
2346 /* it's a section */
2347 int offset = section_name_match(&buf[i], old_name);
2348 if (offset > 0) {
2349 ret++;
2350 if (new_name == NULL) {
2351 remove = 1;
2352 continue;
2353 }
2354 store.baselen = strlen(new_name);
2355 if (!store_write_section(out_fd, new_name)) {
2356 ret = write_error(get_lock_file_path(lock));
2357 goto out;
2358 }
2359 /*
2360 * We wrote out the new section, with
2361 * a newline, now skip the old
2362 * section's length
2363 */
2364 output += offset + i;
2365 if (strlen(output) > 0) {
2366 /*
2367 * More content means there's
2368 * a declaration to put on the
2369 * next line; indent with a
2370 * tab
2371 */
2372 output -= 1;
2373 output[0] = '\t';
2374 }
2375 }
2376 remove = 0;
2377 }
2378 if (remove)
2379 continue;
2380 length = strlen(output);
2381 if (write_in_full(out_fd, output, length) != length) {
2382 ret = write_error(get_lock_file_path(lock));
2383 goto out;
2384 }
2385 }
2386 fclose(config_file);
2387 unlock_and_out:
2388 if (commit_lock_file(lock) < 0)
2389 ret = error("could not write config file %s: %s",
2390 config_filename, strerror(errno));
2391 out:
2392 free(filename_buf);
2393 return ret;
2394 }
2395
2396 int git_config_rename_section(const char *old_name, const char *new_name)
2397 {
2398 return git_config_rename_section_in_file(NULL, old_name, new_name);
2399 }
2400
2401 /*
2402 * Call this to report error for your variable that should not
2403 * get a boolean value (i.e. "[my] var" means "true").
2404 */
2405 #undef config_error_nonbool
2406 int config_error_nonbool(const char *var)
2407 {
2408 return error("missing value for '%s'", var);
2409 }
2410
2411 int parse_config_key(const char *var,
2412 const char *section,
2413 const char **subsection, int *subsection_len,
2414 const char **key)
2415 {
2416 int section_len = strlen(section);
2417 const char *dot;
2418
2419 /* Does it start with "section." ? */
2420 if (!starts_with(var, section) || var[section_len] != '.')
2421 return -1;
2422
2423 /*
2424 * Find the key; we don't know yet if we have a subsection, but we must
2425 * parse backwards from the end, since the subsection may have dots in
2426 * it, too.
2427 */
2428 dot = strrchr(var, '.');
2429 *key = dot + 1;
2430
2431 /* Did we have a subsection at all? */
2432 if (dot == var + section_len) {
2433 *subsection = NULL;
2434 *subsection_len = 0;
2435 }
2436 else {
2437 *subsection = var + section_len + 1;
2438 *subsection_len = dot - *subsection;
2439 }
2440
2441 return 0;
2442 }
2443
2444 const char *current_config_origin_type(void)
2445 {
2446 return cf && cf->origin_type ? cf->origin_type : "command line";
2447 }
2448
2449 const char *current_config_name(void)
2450 {
2451 return cf && cf->name ? cf->name : "";
2452 }
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