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Merge branch 'jc/linkgit-fix' into maint
[git.git] / config.c
blobadf12a17ef41f70244df320df404d9ccaefd7b4b
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 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 if (!strcmp(var, "core.hidedotfiles")) {
916 if (value && !strcasecmp(value, "dotgitonly"))
917 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
918 else
919 hide_dotfiles = git_config_bool(var, value);
920 return 0;
921 }
922
923 /* Add other config variables here and to Documentation/config.txt. */
924 return 0;
925 }
926
927 static int git_default_i18n_config(const char *var, const char *value)
928 {
929 if (!strcmp(var, "i18n.commitencoding"))
930 return git_config_string(&git_commit_encoding, var, value);
931
932 if (!strcmp(var, "i18n.logoutputencoding"))
933 return git_config_string(&git_log_output_encoding, var, value);
934
935 /* Add other config variables here and to Documentation/config.txt. */
936 return 0;
937 }
938
939 static int git_default_branch_config(const char *var, const char *value)
940 {
941 if (!strcmp(var, "branch.autosetupmerge")) {
942 if (value && !strcasecmp(value, "always")) {
943 git_branch_track = BRANCH_TRACK_ALWAYS;
944 return 0;
945 }
946 git_branch_track = git_config_bool(var, value);
947 return 0;
948 }
949 if (!strcmp(var, "branch.autosetuprebase")) {
950 if (!value)
951 return config_error_nonbool(var);
952 else if (!strcmp(value, "never"))
953 autorebase = AUTOREBASE_NEVER;
954 else if (!strcmp(value, "local"))
955 autorebase = AUTOREBASE_LOCAL;
956 else if (!strcmp(value, "remote"))
957 autorebase = AUTOREBASE_REMOTE;
958 else if (!strcmp(value, "always"))
959 autorebase = AUTOREBASE_ALWAYS;
960 else
961 return error("malformed value for %s", var);
962 return 0;
963 }
964
965 /* Add other config variables here and to Documentation/config.txt. */
966 return 0;
967 }
968
969 static int git_default_push_config(const char *var, const char *value)
970 {
971 if (!strcmp(var, "push.default")) {
972 if (!value)
973 return config_error_nonbool(var);
974 else if (!strcmp(value, "nothing"))
975 push_default = PUSH_DEFAULT_NOTHING;
976 else if (!strcmp(value, "matching"))
977 push_default = PUSH_DEFAULT_MATCHING;
978 else if (!strcmp(value, "simple"))
979 push_default = PUSH_DEFAULT_SIMPLE;
980 else if (!strcmp(value, "upstream"))
981 push_default = PUSH_DEFAULT_UPSTREAM;
982 else if (!strcmp(value, "tracking")) /* deprecated */
983 push_default = PUSH_DEFAULT_UPSTREAM;
984 else if (!strcmp(value, "current"))
985 push_default = PUSH_DEFAULT_CURRENT;
986 else {
987 error("malformed value for %s: %s", var, value);
988 return error("Must be one of nothing, matching, simple, "
989 "upstream or current.");
990 }
991 return 0;
992 }
993
994 /* Add other config variables here and to Documentation/config.txt. */
995 return 0;
996 }
997
998 static int git_default_mailmap_config(const char *var, const char *value)
999 {
1000 if (!strcmp(var, "mailmap.file"))
1001 return git_config_pathname(&git_mailmap_file, var, value);
1002 if (!strcmp(var, "mailmap.blob"))
1003 return git_config_string(&git_mailmap_blob, var, value);
1004
1005 /* Add other config variables here and to Documentation/config.txt. */
1006 return 0;
1007 }
1008
1009 int git_default_config(const char *var, const char *value, void *dummy)
1010 {
1011 if (starts_with(var, "core."))
1012 return git_default_core_config(var, value);
1013
1014 if (starts_with(var, "user."))
1015 return git_ident_config(var, value, dummy);
1016
1017 if (starts_with(var, "i18n."))
1018 return git_default_i18n_config(var, value);
1019
1020 if (starts_with(var, "branch."))
1021 return git_default_branch_config(var, value);
1022
1023 if (starts_with(var, "push."))
1024 return git_default_push_config(var, value);
1025
1026 if (starts_with(var, "mailmap."))
1027 return git_default_mailmap_config(var, value);
1028
1029 if (starts_with(var, "advice."))
1030 return git_default_advice_config(var, value);
1031
1032 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1033 pager_use_color = git_config_bool(var,value);
1034 return 0;
1035 }
1036
1037 if (!strcmp(var, "pack.packsizelimit")) {
1038 pack_size_limit_cfg = git_config_ulong(var, value);
1039 return 0;
1040 }
1041 /* Add other config variables here and to Documentation/config.txt. */
1042 return 0;
1043 }
1044
1045 /*
1046 * All source specific fields in the union, die_on_error, name and the callbacks
1047 * fgetc, ungetc, ftell of top need to be initialized before calling
1048 * this function.
1049 */
1050 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1051 {
1052 int ret;
1053
1054 /* push config-file parsing state stack */
1055 top->prev = cf;
1056 top->linenr = 1;
1057 top->eof = 0;
1058 strbuf_init(&top->value, 1024);
1059 strbuf_init(&top->var, 1024);
1060 cf = top;
1061
1062 ret = git_parse_source(fn, data);
1063
1064 /* pop config-file parsing state stack */
1065 strbuf_release(&top->value);
1066 strbuf_release(&top->var);
1067 cf = top->prev;
1068
1069 return ret;
1070 }
1071
1072 static int do_config_from_file(config_fn_t fn,
1073 const char *origin_type, const char *name, const char *path, FILE *f,
1074 void *data)
1075 {
1076 struct config_source top;
1077
1078 top.u.file = f;
1079 top.origin_type = origin_type;
1080 top.name = name;
1081 top.path = path;
1082 top.die_on_error = 1;
1083 top.do_fgetc = config_file_fgetc;
1084 top.do_ungetc = config_file_ungetc;
1085 top.do_ftell = config_file_ftell;
1086
1087 return do_config_from(&top, fn, data);
1088 }
1089
1090 static int git_config_from_stdin(config_fn_t fn, void *data)
1091 {
1092 return do_config_from_file(fn, "standard input", "", NULL, stdin, data);
1093 }
1094
1095 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1096 {
1097 int ret = -1;
1098 FILE *f;
1099
1100 f = fopen(filename, "r");
1101 if (f) {
1102 flockfile(f);
1103 ret = do_config_from_file(fn, "file", filename, filename, f, data);
1104 funlockfile(f);
1105 fclose(f);
1106 }
1107 return ret;
1108 }
1109
1110 int git_config_from_mem(config_fn_t fn, const char *origin_type,
1111 const char *name, const char *buf, size_t len, void *data)
1112 {
1113 struct config_source top;
1114
1115 top.u.buf.buf = buf;
1116 top.u.buf.len = len;
1117 top.u.buf.pos = 0;
1118 top.origin_type = origin_type;
1119 top.name = name;
1120 top.path = NULL;
1121 top.die_on_error = 0;
1122 top.do_fgetc = config_buf_fgetc;
1123 top.do_ungetc = config_buf_ungetc;
1124 top.do_ftell = config_buf_ftell;
1125
1126 return do_config_from(&top, fn, data);
1127 }
1128
1129 static int git_config_from_blob_sha1(config_fn_t fn,
1130 const char *name,
1131 const unsigned char *sha1,
1132 void *data)
1133 {
1134 enum object_type type;
1135 char *buf;
1136 unsigned long size;
1137 int ret;
1138
1139 buf = read_sha1_file(sha1, &type, &size);
1140 if (!buf)
1141 return error("unable to load config blob object '%s'", name);
1142 if (type != OBJ_BLOB) {
1143 free(buf);
1144 return error("reference '%s' does not point to a blob", name);
1145 }
1146
1147 ret = git_config_from_mem(fn, "blob", name, buf, size, data);
1148 free(buf);
1149
1150 return ret;
1151 }
1152
1153 static int git_config_from_blob_ref(config_fn_t fn,
1154 const char *name,
1155 void *data)
1156 {
1157 unsigned char sha1[20];
1158
1159 if (get_sha1(name, sha1) < 0)
1160 return error("unable to resolve config blob '%s'", name);
1161 return git_config_from_blob_sha1(fn, name, sha1, data);
1162 }
1163
1164 const char *git_etc_gitconfig(void)
1165 {
1166 static const char *system_wide;
1167 if (!system_wide)
1168 system_wide = system_path(ETC_GITCONFIG);
1169 return system_wide;
1170 }
1171
1172 /*
1173 * Parse environment variable 'k' as a boolean (in various
1174 * possible spellings); if missing, use the default value 'def'.
1175 */
1176 int git_env_bool(const char *k, int def)
1177 {
1178 const char *v = getenv(k);
1179 return v ? git_config_bool(k, v) : def;
1180 }
1181
1182 /*
1183 * Parse environment variable 'k' as ulong with possibly a unit
1184 * suffix; if missing, use the default value 'val'.
1185 */
1186 unsigned long git_env_ulong(const char *k, unsigned long val)
1187 {
1188 const char *v = getenv(k);
1189 if (v && !git_parse_ulong(v, &val))
1190 die("failed to parse %s", k);
1191 return val;
1192 }
1193
1194 int git_config_system(void)
1195 {
1196 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1197 }
1198
1199 static int do_git_config_sequence(config_fn_t fn, void *data)
1200 {
1201 int ret = 0, found = 0;
1202 char *xdg_config = xdg_config_home("config");
1203 char *user_config = expand_user_path("~/.gitconfig");
1204 char *repo_config = git_pathdup("config");
1205
1206 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
1207 ret += git_config_from_file(fn, git_etc_gitconfig(),
1208 data);
1209 found += 1;
1210 }
1211
1212 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
1213 ret += git_config_from_file(fn, xdg_config, data);
1214 found += 1;
1215 }
1216
1217 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
1218 ret += git_config_from_file(fn, user_config, data);
1219 found += 1;
1220 }
1221
1222 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
1223 ret += git_config_from_file(fn, repo_config, data);
1224 found += 1;
1225 }
1226
1227 switch (git_config_from_parameters(fn, data)) {
1228 case -1: /* error */
1229 die(_("unable to parse command-line config"));
1230 break;
1231 case 0: /* found nothing */
1232 break;
1233 default: /* found at least one item */
1234 found++;
1235 break;
1236 }
1237
1238 free(xdg_config);
1239 free(user_config);
1240 free(repo_config);
1241 return ret == 0 ? found : ret;
1242 }
1243
1244 int git_config_with_options(config_fn_t fn, void *data,
1245 struct git_config_source *config_source,
1246 int respect_includes)
1247 {
1248 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1249
1250 if (respect_includes) {
1251 inc.fn = fn;
1252 inc.data = data;
1253 fn = git_config_include;
1254 data = &inc;
1255 }
1256
1257 /*
1258 * If we have a specific filename, use it. Otherwise, follow the
1259 * regular lookup sequence.
1260 */
1261 if (config_source && config_source->use_stdin)
1262 return git_config_from_stdin(fn, data);
1263 else if (config_source && config_source->file)
1264 return git_config_from_file(fn, config_source->file, data);
1265 else if (config_source && config_source->blob)
1266 return git_config_from_blob_ref(fn, config_source->blob, data);
1267
1268 return do_git_config_sequence(fn, data);
1269 }
1270
1271 static void git_config_raw(config_fn_t fn, void *data)
1272 {
1273 if (git_config_with_options(fn, data, NULL, 1) < 0)
1274 /*
1275 * git_config_with_options() normally returns only
1276 * positive values, as most errors are fatal, and
1277 * non-fatal potential errors are guarded by "if"
1278 * statements that are entered only when no error is
1279 * possible.
1280 *
1281 * If we ever encounter a non-fatal error, it means
1282 * something went really wrong and we should stop
1283 * immediately.
1284 */
1285 die(_("unknown error occured while reading the configuration files"));
1286 }
1287
1288 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1289 {
1290 int i, value_index;
1291 struct string_list *values;
1292 struct config_set_element *entry;
1293 struct configset_list *list = &cs->list;
1294 struct key_value_info *kv_info;
1295
1296 for (i = 0; i < list->nr; i++) {
1297 entry = list->items[i].e;
1298 value_index = list->items[i].value_index;
1299 values = &entry->value_list;
1300 if (fn(entry->key, values->items[value_index].string, data) < 0) {
1301 kv_info = values->items[value_index].util;
1302 git_die_config_linenr(entry->key, kv_info->filename, kv_info->linenr);
1303 }
1304 }
1305 }
1306
1307 static void git_config_check_init(void);
1308
1309 void git_config(config_fn_t fn, void *data)
1310 {
1311 git_config_check_init();
1312 configset_iter(&the_config_set, fn, data);
1313 }
1314
1315 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1316 {
1317 struct config_set_element k;
1318 struct config_set_element *found_entry;
1319 char *normalized_key;
1320 /*
1321 * `key` may come from the user, so normalize it before using it
1322 * for querying entries from the hashmap.
1323 */
1324 if (git_config_parse_key(key, &normalized_key, NULL))
1325 return NULL;
1326
1327 hashmap_entry_init(&k, strhash(normalized_key));
1328 k.key = normalized_key;
1329 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1330 free(normalized_key);
1331 return found_entry;
1332 }
1333
1334 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1335 {
1336 struct config_set_element *e;
1337 struct string_list_item *si;
1338 struct configset_list_item *l_item;
1339 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1340
1341 e = configset_find_element(cs, key);
1342 /*
1343 * Since the keys are being fed by git_config*() callback mechanism, they
1344 * are already normalized. So simply add them without any further munging.
1345 */
1346 if (!e) {
1347 e = xmalloc(sizeof(*e));
1348 hashmap_entry_init(e, strhash(key));
1349 e->key = xstrdup(key);
1350 string_list_init(&e->value_list, 1);
1351 hashmap_add(&cs->config_hash, e);
1352 }
1353 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1354
1355 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1356 l_item = &cs->list.items[cs->list.nr++];
1357 l_item->e = e;
1358 l_item->value_index = e->value_list.nr - 1;
1359
1360 if (cf) {
1361 kv_info->filename = strintern(cf->name);
1362 kv_info->linenr = cf->linenr;
1363 } else {
1364 /* for values read from `git_config_from_parameters()` */
1365 kv_info->filename = NULL;
1366 kv_info->linenr = -1;
1367 }
1368 si->util = kv_info;
1369
1370 return 0;
1371 }
1372
1373 static int config_set_element_cmp(const struct config_set_element *e1,
1374 const struct config_set_element *e2, const void *unused)
1375 {
1376 return strcmp(e1->key, e2->key);
1377 }
1378
1379 void git_configset_init(struct config_set *cs)
1380 {
1381 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1382 cs->hash_initialized = 1;
1383 cs->list.nr = 0;
1384 cs->list.alloc = 0;
1385 cs->list.items = NULL;
1386 }
1387
1388 void git_configset_clear(struct config_set *cs)
1389 {
1390 struct config_set_element *entry;
1391 struct hashmap_iter iter;
1392 if (!cs->hash_initialized)
1393 return;
1394
1395 hashmap_iter_init(&cs->config_hash, &iter);
1396 while ((entry = hashmap_iter_next(&iter))) {
1397 free(entry->key);
1398 string_list_clear(&entry->value_list, 1);
1399 }
1400 hashmap_free(&cs->config_hash, 1);
1401 cs->hash_initialized = 0;
1402 free(cs->list.items);
1403 cs->list.nr = 0;
1404 cs->list.alloc = 0;
1405 cs->list.items = NULL;
1406 }
1407
1408 static int config_set_callback(const char *key, const char *value, void *cb)
1409 {
1410 struct config_set *cs = cb;
1411 configset_add_value(cs, key, value);
1412 return 0;
1413 }
1414
1415 int git_configset_add_file(struct config_set *cs, const char *filename)
1416 {
1417 return git_config_from_file(config_set_callback, filename, cs);
1418 }
1419
1420 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1421 {
1422 const struct string_list *values = NULL;
1423 /*
1424 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1425 * queried key in the files of the configset, the value returned will be the last
1426 * value in the value list for that key.
1427 */
1428 values = git_configset_get_value_multi(cs, key);
1429
1430 if (!values)
1431 return 1;
1432 assert(values->nr > 0);
1433 *value = values->items[values->nr - 1].string;
1434 return 0;
1435 }
1436
1437 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1438 {
1439 struct config_set_element *e = configset_find_element(cs, key);
1440 return e ? &e->value_list : NULL;
1441 }
1442
1443 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1444 {
1445 const char *value;
1446 if (!git_configset_get_value(cs, key, &value))
1447 return git_config_string(dest, key, value);
1448 else
1449 return 1;
1450 }
1451
1452 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1453 {
1454 return git_configset_get_string_const(cs, key, (const char **)dest);
1455 }
1456
1457 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1458 {
1459 const char *value;
1460 if (!git_configset_get_value(cs, key, &value)) {
1461 *dest = git_config_int(key, value);
1462 return 0;
1463 } else
1464 return 1;
1465 }
1466
1467 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1468 {
1469 const char *value;
1470 if (!git_configset_get_value(cs, key, &value)) {
1471 *dest = git_config_ulong(key, value);
1472 return 0;
1473 } else
1474 return 1;
1475 }
1476
1477 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1478 {
1479 const char *value;
1480 if (!git_configset_get_value(cs, key, &value)) {
1481 *dest = git_config_bool(key, value);
1482 return 0;
1483 } else
1484 return 1;
1485 }
1486
1487 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1488 int *is_bool, int *dest)
1489 {
1490 const char *value;
1491 if (!git_configset_get_value(cs, key, &value)) {
1492 *dest = git_config_bool_or_int(key, value, is_bool);
1493 return 0;
1494 } else
1495 return 1;
1496 }
1497
1498 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1499 {
1500 const char *value;
1501 if (!git_configset_get_value(cs, key, &value)) {
1502 *dest = git_config_maybe_bool(key, value);
1503 if (*dest == -1)
1504 return -1;
1505 return 0;
1506 } else
1507 return 1;
1508 }
1509
1510 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1511 {
1512 const char *value;
1513 if (!git_configset_get_value(cs, key, &value))
1514 return git_config_pathname(dest, key, value);
1515 else
1516 return 1;
1517 }
1518
1519 static void git_config_check_init(void)
1520 {
1521 if (the_config_set.hash_initialized)
1522 return;
1523 git_configset_init(&the_config_set);
1524 git_config_raw(config_set_callback, &the_config_set);
1525 }
1526
1527 void git_config_clear(void)
1528 {
1529 if (!the_config_set.hash_initialized)
1530 return;
1531 git_configset_clear(&the_config_set);
1532 }
1533
1534 int git_config_get_value(const char *key, const char **value)
1535 {
1536 git_config_check_init();
1537 return git_configset_get_value(&the_config_set, key, value);
1538 }
1539
1540 const struct string_list *git_config_get_value_multi(const char *key)
1541 {
1542 git_config_check_init();
1543 return git_configset_get_value_multi(&the_config_set, key);
1544 }
1545
1546 int git_config_get_string_const(const char *key, const char **dest)
1547 {
1548 int ret;
1549 git_config_check_init();
1550 ret = git_configset_get_string_const(&the_config_set, key, dest);
1551 if (ret < 0)
1552 git_die_config(key, NULL);
1553 return ret;
1554 }
1555
1556 int git_config_get_string(const char *key, char **dest)
1557 {
1558 git_config_check_init();
1559 return git_config_get_string_const(key, (const char **)dest);
1560 }
1561
1562 int git_config_get_int(const char *key, int *dest)
1563 {
1564 git_config_check_init();
1565 return git_configset_get_int(&the_config_set, key, dest);
1566 }
1567
1568 int git_config_get_ulong(const char *key, unsigned long *dest)
1569 {
1570 git_config_check_init();
1571 return git_configset_get_ulong(&the_config_set, key, dest);
1572 }
1573
1574 int git_config_get_bool(const char *key, int *dest)
1575 {
1576 git_config_check_init();
1577 return git_configset_get_bool(&the_config_set, key, dest);
1578 }
1579
1580 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1581 {
1582 git_config_check_init();
1583 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1584 }
1585
1586 int git_config_get_maybe_bool(const char *key, int *dest)
1587 {
1588 git_config_check_init();
1589 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1590 }
1591
1592 int git_config_get_pathname(const char *key, const char **dest)
1593 {
1594 int ret;
1595 git_config_check_init();
1596 ret = git_configset_get_pathname(&the_config_set, key, dest);
1597 if (ret < 0)
1598 git_die_config(key, NULL);
1599 return ret;
1600 }
1601
1602 int git_config_get_untracked_cache(void)
1603 {
1604 int val = -1;
1605 const char *v;
1606
1607 /* Hack for test programs like test-dump-untracked-cache */
1608 if (ignore_untracked_cache_config)
1609 return -1;
1610
1611 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1612 return val;
1613
1614 if (!git_config_get_value("core.untrackedcache", &v)) {
1615 if (!strcasecmp(v, "keep"))
1616 return -1;
1617
1618 error("unknown core.untrackedCache value '%s'; "
1619 "using 'keep' default value", v);
1620 return -1;
1621 }
1622
1623 return -1; /* default value */
1624 }
1625
1626 NORETURN
1627 void git_die_config_linenr(const char *key, const char *filename, int linenr)
1628 {
1629 if (!filename)
1630 die(_("unable to parse '%s' from command-line config"), key);
1631 else
1632 die(_("bad config variable '%s' in file '%s' at line %d"),
1633 key, filename, linenr);
1634 }
1635
1636 NORETURN __attribute__((format(printf, 2, 3)))
1637 void git_die_config(const char *key, const char *err, ...)
1638 {
1639 const struct string_list *values;
1640 struct key_value_info *kv_info;
1641
1642 if (err) {
1643 va_list params;
1644 va_start(params, err);
1645 vreportf("error: ", err, params);
1646 va_end(params);
1647 }
1648 values = git_config_get_value_multi(key);
1649 kv_info = values->items[values->nr - 1].util;
1650 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
1651 }
1652
1653 /*
1654 * Find all the stuff for git_config_set() below.
1655 */
1656
1657 static struct {
1658 int baselen;
1659 char *key;
1660 int do_not_match;
1661 regex_t *value_regex;
1662 int multi_replace;
1663 size_t *offset;
1664 unsigned int offset_alloc;
1665 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1666 int seen;
1667 } store;
1668
1669 static int matches(const char *key, const char *value)
1670 {
1671 if (strcmp(key, store.key))
1672 return 0; /* not ours */
1673 if (!store.value_regex)
1674 return 1; /* always matches */
1675 if (store.value_regex == CONFIG_REGEX_NONE)
1676 return 0; /* never matches */
1677
1678 return store.do_not_match ^
1679 (value && !regexec(store.value_regex, value, 0, NULL, 0));
1680 }
1681
1682 static int store_aux(const char *key, const char *value, void *cb)
1683 {
1684 const char *ep;
1685 size_t section_len;
1686
1687 switch (store.state) {
1688 case KEY_SEEN:
1689 if (matches(key, value)) {
1690 if (store.seen == 1 && store.multi_replace == 0) {
1691 warning(_("%s has multiple values"), key);
1692 }
1693
1694 ALLOC_GROW(store.offset, store.seen + 1,
1695 store.offset_alloc);
1696
1697 store.offset[store.seen] = cf->do_ftell(cf);
1698 store.seen++;
1699 }
1700 break;
1701 case SECTION_SEEN:
1702 /*
1703 * What we are looking for is in store.key (both
1704 * section and var), and its section part is baselen
1705 * long. We found key (again, both section and var).
1706 * We would want to know if this key is in the same
1707 * section as what we are looking for. We already
1708 * know we are in the same section as what should
1709 * hold store.key.
1710 */
1711 ep = strrchr(key, '.');
1712 section_len = ep - key;
1713
1714 if ((section_len != store.baselen) ||
1715 memcmp(key, store.key, section_len+1)) {
1716 store.state = SECTION_END_SEEN;
1717 break;
1718 }
1719
1720 /*
1721 * Do not increment matches: this is no match, but we
1722 * just made sure we are in the desired section.
1723 */
1724 ALLOC_GROW(store.offset, store.seen + 1,
1725 store.offset_alloc);
1726 store.offset[store.seen] = cf->do_ftell(cf);
1727 /* fallthru */
1728 case SECTION_END_SEEN:
1729 case START:
1730 if (matches(key, value)) {
1731 ALLOC_GROW(store.offset, store.seen + 1,
1732 store.offset_alloc);
1733 store.offset[store.seen] = cf->do_ftell(cf);
1734 store.state = KEY_SEEN;
1735 store.seen++;
1736 } else {
1737 if (strrchr(key, '.') - key == store.baselen &&
1738 !strncmp(key, store.key, store.baselen)) {
1739 store.state = SECTION_SEEN;
1740 ALLOC_GROW(store.offset,
1741 store.seen + 1,
1742 store.offset_alloc);
1743 store.offset[store.seen] = cf->do_ftell(cf);
1744 }
1745 }
1746 }
1747 return 0;
1748 }
1749
1750 static int write_error(const char *filename)
1751 {
1752 error("failed to write new configuration file %s", filename);
1753
1754 /* Same error code as "failed to rename". */
1755 return 4;
1756 }
1757
1758 static int store_write_section(int fd, const char *key)
1759 {
1760 const char *dot;
1761 int i, success;
1762 struct strbuf sb = STRBUF_INIT;
1763
1764 dot = memchr(key, '.', store.baselen);
1765 if (dot) {
1766 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1767 for (i = dot - key + 1; i < store.baselen; i++) {
1768 if (key[i] == '"' || key[i] == '\\')
1769 strbuf_addch(&sb, '\\');
1770 strbuf_addch(&sb, key[i]);
1771 }
1772 strbuf_addstr(&sb, "\"]\n");
1773 } else {
1774 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1775 }
1776
1777 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1778 strbuf_release(&sb);
1779
1780 return success;
1781 }
1782
1783 static int store_write_pair(int fd, const char *key, const char *value)
1784 {
1785 int i, success;
1786 int length = strlen(key + store.baselen + 1);
1787 const char *quote = "";
1788 struct strbuf sb = STRBUF_INIT;
1789
1790 /*
1791 * Check to see if the value needs to be surrounded with a dq pair.
1792 * Note that problematic characters are always backslash-quoted; this
1793 * check is about not losing leading or trailing SP and strings that
1794 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1795 * configuration parser.
1796 */
1797 if (value[0] == ' ')
1798 quote = "\"";
1799 for (i = 0; value[i]; i++)
1800 if (value[i] == ';' || value[i] == '#')
1801 quote = "\"";
1802 if (i && value[i - 1] == ' ')
1803 quote = "\"";
1804
1805 strbuf_addf(&sb, "\t%.*s = %s",
1806 length, key + store.baselen + 1, quote);
1807
1808 for (i = 0; value[i]; i++)
1809 switch (value[i]) {
1810 case '\n':
1811 strbuf_addstr(&sb, "\\n");
1812 break;
1813 case '\t':
1814 strbuf_addstr(&sb, "\\t");
1815 break;
1816 case '"':
1817 case '\\':
1818 strbuf_addch(&sb, '\\');
1819 default:
1820 strbuf_addch(&sb, value[i]);
1821 break;
1822 }
1823 strbuf_addf(&sb, "%s\n", quote);
1824
1825 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1826 strbuf_release(&sb);
1827
1828 return success;
1829 }
1830
1831 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1832 size_t offset_, int *found_bracket)
1833 {
1834 size_t equal_offset = size, bracket_offset = size;
1835 ssize_t offset;
1836
1837 contline:
1838 for (offset = offset_-2; offset > 0
1839 && contents[offset] != '\n'; offset--)
1840 switch (contents[offset]) {
1841 case '=': equal_offset = offset; break;
1842 case ']': bracket_offset = offset; break;
1843 }
1844 if (offset > 0 && contents[offset-1] == '\\') {
1845 offset_ = offset;
1846 goto contline;
1847 }
1848 if (bracket_offset < equal_offset) {
1849 *found_bracket = 1;
1850 offset = bracket_offset+1;
1851 } else
1852 offset++;
1853
1854 return offset;
1855 }
1856
1857 int git_config_set_in_file_gently(const char *config_filename,
1858 const char *key, const char *value)
1859 {
1860 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
1861 }
1862
1863 void git_config_set_in_file(const char *config_filename,
1864 const char *key, const char *value)
1865 {
1866 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1867 }
1868
1869 int git_config_set_gently(const char *key, const char *value)
1870 {
1871 return git_config_set_multivar_gently(key, value, NULL, 0);
1872 }
1873
1874 void git_config_set(const char *key, const char *value)
1875 {
1876 git_config_set_multivar(key, value, NULL, 0);
1877 }
1878
1879 /*
1880 * Auxiliary function to sanity-check and split the key into the section
1881 * identifier and variable name.
1882 *
1883 * Returns 0 on success, -1 when there is an invalid character in the key and
1884 * -2 if there is no section name in the key.
1885 *
1886 * store_key - pointer to char* which will hold a copy of the key with
1887 * lowercase section and variable name
1888 * baselen - pointer to int which will hold the length of the
1889 * section + subsection part, can be NULL
1890 */
1891 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
1892 {
1893 int i, dot, baselen;
1894 const char *last_dot = strrchr(key, '.');
1895
1896 /*
1897 * Since "key" actually contains the section name and the real
1898 * key name separated by a dot, we have to know where the dot is.
1899 */
1900
1901 if (last_dot == NULL || last_dot == key) {
1902 if (!quiet)
1903 error("key does not contain a section: %s", key);
1904 return -CONFIG_NO_SECTION_OR_NAME;
1905 }
1906
1907 if (!last_dot[1]) {
1908 if (!quiet)
1909 error("key does not contain variable name: %s", key);
1910 return -CONFIG_NO_SECTION_OR_NAME;
1911 }
1912
1913 baselen = last_dot - key;
1914 if (baselen_)
1915 *baselen_ = baselen;
1916
1917 /*
1918 * Validate the key and while at it, lower case it for matching.
1919 */
1920 if (store_key)
1921 *store_key = xmallocz(strlen(key));
1922
1923 dot = 0;
1924 for (i = 0; key[i]; i++) {
1925 unsigned char c = key[i];
1926 if (c == '.')
1927 dot = 1;
1928 /* Leave the extended basename untouched.. */
1929 if (!dot || i > baselen) {
1930 if (!iskeychar(c) ||
1931 (i == baselen + 1 && !isalpha(c))) {
1932 if (!quiet)
1933 error("invalid key: %s", key);
1934 goto out_free_ret_1;
1935 }
1936 c = tolower(c);
1937 } else if (c == '\n') {
1938 if (!quiet)
1939 error("invalid key (newline): %s", key);
1940 goto out_free_ret_1;
1941 }
1942 if (store_key)
1943 (*store_key)[i] = c;
1944 }
1945
1946 return 0;
1947
1948 out_free_ret_1:
1949 if (store_key) {
1950 free(*store_key);
1951 *store_key = NULL;
1952 }
1953 return -CONFIG_INVALID_KEY;
1954 }
1955
1956 int git_config_parse_key(const char *key, char **store_key, int *baselen)
1957 {
1958 return git_config_parse_key_1(key, store_key, baselen, 0);
1959 }
1960
1961 int git_config_key_is_valid(const char *key)
1962 {
1963 return !git_config_parse_key_1(key, NULL, NULL, 1);
1964 }
1965
1966 /*
1967 * If value==NULL, unset in (remove from) config,
1968 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1969 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
1970 * (only add a new one)
1971 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1972 * else all matching key/values (regardless how many) are removed,
1973 * before the new pair is written.
1974 *
1975 * Returns 0 on success.
1976 *
1977 * This function does this:
1978 *
1979 * - it locks the config file by creating ".git/config.lock"
1980 *
1981 * - it then parses the config using store_aux() as validator to find
1982 * the position on the key/value pair to replace. If it is to be unset,
1983 * it must be found exactly once.
1984 *
1985 * - the config file is mmap()ed and the part before the match (if any) is
1986 * written to the lock file, then the changed part and the rest.
1987 *
1988 * - the config file is removed and the lock file rename()d to it.
1989 *
1990 */
1991 int git_config_set_multivar_in_file_gently(const char *config_filename,
1992 const char *key, const char *value,
1993 const char *value_regex,
1994 int multi_replace)
1995 {
1996 int fd = -1, in_fd = -1;
1997 int ret;
1998 struct lock_file *lock = NULL;
1999 char *filename_buf = NULL;
2000 char *contents = NULL;
2001 size_t contents_sz;
2002
2003 /* parse-key returns negative; flip the sign to feed exit(3) */
2004 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2005 if (ret)
2006 goto out_free;
2007
2008 store.multi_replace = multi_replace;
2009
2010 if (!config_filename)
2011 config_filename = filename_buf = git_pathdup("config");
2012
2013 /*
2014 * The lock serves a purpose in addition to locking: the new
2015 * contents of .git/config will be written into it.
2016 */
2017 lock = xcalloc(1, sizeof(struct lock_file));
2018 fd = hold_lock_file_for_update(lock, config_filename, 0);
2019 if (fd < 0) {
2020 error("could not lock config file %s: %s", config_filename, strerror(errno));
2021 free(store.key);
2022 ret = CONFIG_NO_LOCK;
2023 goto out_free;
2024 }
2025
2026 /*
2027 * If .git/config does not exist yet, write a minimal version.
2028 */
2029 in_fd = open(config_filename, O_RDONLY);
2030 if ( in_fd < 0 ) {
2031 free(store.key);
2032
2033 if ( ENOENT != errno ) {
2034 error("opening %s: %s", config_filename,
2035 strerror(errno));
2036 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2037 goto out_free;
2038 }
2039 /* if nothing to unset, error out */
2040 if (value == NULL) {
2041 ret = CONFIG_NOTHING_SET;
2042 goto out_free;
2043 }
2044
2045 store.key = (char *)key;
2046 if (!store_write_section(fd, key) ||
2047 !store_write_pair(fd, key, value))
2048 goto write_err_out;
2049 } else {
2050 struct stat st;
2051 size_t copy_begin, copy_end;
2052 int i, new_line = 0;
2053
2054 if (value_regex == NULL)
2055 store.value_regex = NULL;
2056 else if (value_regex == CONFIG_REGEX_NONE)
2057 store.value_regex = CONFIG_REGEX_NONE;
2058 else {
2059 if (value_regex[0] == '!') {
2060 store.do_not_match = 1;
2061 value_regex++;
2062 } else
2063 store.do_not_match = 0;
2064
2065 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2066 if (regcomp(store.value_regex, value_regex,
2067 REG_EXTENDED)) {
2068 error("invalid pattern: %s", value_regex);
2069 free(store.value_regex);
2070 ret = CONFIG_INVALID_PATTERN;
2071 goto out_free;
2072 }
2073 }
2074
2075 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2076 store.offset[0] = 0;
2077 store.state = START;
2078 store.seen = 0;
2079
2080 /*
2081 * After this, store.offset will contain the *end* offset
2082 * of the last match, or remain at 0 if no match was found.
2083 * As a side effect, we make sure to transform only a valid
2084 * existing config file.
2085 */
2086 if (git_config_from_file(store_aux, config_filename, NULL)) {
2087 error("invalid config file %s", config_filename);
2088 free(store.key);
2089 if (store.value_regex != NULL &&
2090 store.value_regex != CONFIG_REGEX_NONE) {
2091 regfree(store.value_regex);
2092 free(store.value_regex);
2093 }
2094 ret = CONFIG_INVALID_FILE;
2095 goto out_free;
2096 }
2097
2098 free(store.key);
2099 if (store.value_regex != NULL &&
2100 store.value_regex != CONFIG_REGEX_NONE) {
2101 regfree(store.value_regex);
2102 free(store.value_regex);
2103 }
2104
2105 /* if nothing to unset, or too many matches, error out */
2106 if ((store.seen == 0 && value == NULL) ||
2107 (store.seen > 1 && multi_replace == 0)) {
2108 ret = CONFIG_NOTHING_SET;
2109 goto out_free;
2110 }
2111
2112 fstat(in_fd, &st);
2113 contents_sz = xsize_t(st.st_size);
2114 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2115 MAP_PRIVATE, in_fd, 0);
2116 if (contents == MAP_FAILED) {
2117 if (errno == ENODEV && S_ISDIR(st.st_mode))
2118 errno = EISDIR;
2119 error("unable to mmap '%s': %s",
2120 config_filename, strerror(errno));
2121 ret = CONFIG_INVALID_FILE;
2122 contents = NULL;
2123 goto out_free;
2124 }
2125 close(in_fd);
2126 in_fd = -1;
2127
2128 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2129 error("chmod on %s failed: %s",
2130 get_lock_file_path(lock), strerror(errno));
2131 ret = CONFIG_NO_WRITE;
2132 goto out_free;
2133 }
2134
2135 if (store.seen == 0)
2136 store.seen = 1;
2137
2138 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2139 if (store.offset[i] == 0) {
2140 store.offset[i] = copy_end = contents_sz;
2141 } else if (store.state != KEY_SEEN) {
2142 copy_end = store.offset[i];
2143 } else
2144 copy_end = find_beginning_of_line(
2145 contents, contents_sz,
2146 store.offset[i]-2, &new_line);
2147
2148 if (copy_end > 0 && contents[copy_end-1] != '\n')
2149 new_line = 1;
2150
2151 /* write the first part of the config */
2152 if (copy_end > copy_begin) {
2153 if (write_in_full(fd, contents + copy_begin,
2154 copy_end - copy_begin) <
2155 copy_end - copy_begin)
2156 goto write_err_out;
2157 if (new_line &&
2158 write_str_in_full(fd, "\n") != 1)
2159 goto write_err_out;
2160 }
2161 copy_begin = store.offset[i];
2162 }
2163
2164 /* write the pair (value == NULL means unset) */
2165 if (value != NULL) {
2166 if (store.state == START) {
2167 if (!store_write_section(fd, key))
2168 goto write_err_out;
2169 }
2170 if (!store_write_pair(fd, key, value))
2171 goto write_err_out;
2172 }
2173
2174 /* write the rest of the config */
2175 if (copy_begin < contents_sz)
2176 if (write_in_full(fd, contents + copy_begin,
2177 contents_sz - copy_begin) <
2178 contents_sz - copy_begin)
2179 goto write_err_out;
2180
2181 munmap(contents, contents_sz);
2182 contents = NULL;
2183 }
2184
2185 if (commit_lock_file(lock) < 0) {
2186 error("could not write config file %s: %s", config_filename,
2187 strerror(errno));
2188 ret = CONFIG_NO_WRITE;
2189 lock = NULL;
2190 goto out_free;
2191 }
2192
2193 /*
2194 * lock is committed, so don't try to roll it back below.
2195 * NOTE: Since lockfile.c keeps a linked list of all created
2196 * lock_file structures, it isn't safe to free(lock). It's
2197 * better to just leave it hanging around.
2198 */
2199 lock = NULL;
2200 ret = 0;
2201
2202 /* Invalidate the config cache */
2203 git_config_clear();
2204
2205 out_free:
2206 if (lock)
2207 rollback_lock_file(lock);
2208 free(filename_buf);
2209 if (contents)
2210 munmap(contents, contents_sz);
2211 if (in_fd >= 0)
2212 close(in_fd);
2213 return ret;
2214
2215 write_err_out:
2216 ret = write_error(get_lock_file_path(lock));
2217 goto out_free;
2218
2219 }
2220
2221 void git_config_set_multivar_in_file(const char *config_filename,
2222 const char *key, const char *value,
2223 const char *value_regex, int multi_replace)
2224 {
2225 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2226 value_regex, multi_replace))
2227 return;
2228 if (value)
2229 die(_("could not set '%s' to '%s'"), key, value);
2230 else
2231 die(_("could not unset '%s'"), key);
2232 }
2233
2234 int git_config_set_multivar_gently(const char *key, const char *value,
2235 const char *value_regex, int multi_replace)
2236 {
2237 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2238 multi_replace);
2239 }
2240
2241 void git_config_set_multivar(const char *key, const char *value,
2242 const char *value_regex, int multi_replace)
2243 {
2244 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2245 multi_replace);
2246 }
2247
2248 static int section_name_match (const char *buf, const char *name)
2249 {
2250 int i = 0, j = 0, dot = 0;
2251 if (buf[i] != '[')
2252 return 0;
2253 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2254 if (!dot && isspace(buf[i])) {
2255 dot = 1;
2256 if (name[j++] != '.')
2257 break;
2258 for (i++; isspace(buf[i]); i++)
2259 ; /* do nothing */
2260 if (buf[i] != '"')
2261 break;
2262 continue;
2263 }
2264 if (buf[i] == '\\' && dot)
2265 i++;
2266 else if (buf[i] == '"' && dot) {
2267 for (i++; isspace(buf[i]); i++)
2268 ; /* do_nothing */
2269 break;
2270 }
2271 if (buf[i] != name[j++])
2272 break;
2273 }
2274 if (buf[i] == ']' && name[j] == 0) {
2275 /*
2276 * We match, now just find the right length offset by
2277 * gobbling up any whitespace after it, as well
2278 */
2279 i++;
2280 for (; buf[i] && isspace(buf[i]); i++)
2281 ; /* do nothing */
2282 return i;
2283 }
2284 return 0;
2285 }
2286
2287 static int section_name_is_ok(const char *name)
2288 {
2289 /* Empty section names are bogus. */
2290 if (!*name)
2291 return 0;
2292
2293 /*
2294 * Before a dot, we must be alphanumeric or dash. After the first dot,
2295 * anything goes, so we can stop checking.
2296 */
2297 for (; *name && *name != '.'; name++)
2298 if (*name != '-' && !isalnum(*name))
2299 return 0;
2300 return 1;
2301 }
2302
2303 /* if new_name == NULL, the section is removed instead */
2304 int git_config_rename_section_in_file(const char *config_filename,
2305 const char *old_name, const char *new_name)
2306 {
2307 int ret = 0, remove = 0;
2308 char *filename_buf = NULL;
2309 struct lock_file *lock;
2310 int out_fd;
2311 char buf[1024];
2312 FILE *config_file;
2313 struct stat st;
2314
2315 if (new_name && !section_name_is_ok(new_name)) {
2316 ret = error("invalid section name: %s", new_name);
2317 goto out;
2318 }
2319
2320 if (!config_filename)
2321 config_filename = filename_buf = git_pathdup("config");
2322
2323 lock = xcalloc(1, sizeof(struct lock_file));
2324 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2325 if (out_fd < 0) {
2326 ret = error("could not lock config file %s", config_filename);
2327 goto out;
2328 }
2329
2330 if (!(config_file = fopen(config_filename, "rb"))) {
2331 /* no config file means nothing to rename, no error */
2332 goto unlock_and_out;
2333 }
2334
2335 fstat(fileno(config_file), &st);
2336
2337 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2338 ret = error("chmod on %s failed: %s",
2339 get_lock_file_path(lock), strerror(errno));
2340 goto out;
2341 }
2342
2343 while (fgets(buf, sizeof(buf), config_file)) {
2344 int i;
2345 int length;
2346 char *output = buf;
2347 for (i = 0; buf[i] && isspace(buf[i]); i++)
2348 ; /* do nothing */
2349 if (buf[i] == '[') {
2350 /* it's a section */
2351 int offset = section_name_match(&buf[i], old_name);
2352 if (offset > 0) {
2353 ret++;
2354 if (new_name == NULL) {
2355 remove = 1;
2356 continue;
2357 }
2358 store.baselen = strlen(new_name);
2359 if (!store_write_section(out_fd, new_name)) {
2360 ret = write_error(get_lock_file_path(lock));
2361 goto out;
2362 }
2363 /*
2364 * We wrote out the new section, with
2365 * a newline, now skip the old
2366 * section's length
2367 */
2368 output += offset + i;
2369 if (strlen(output) > 0) {
2370 /*
2371 * More content means there's
2372 * a declaration to put on the
2373 * next line; indent with a
2374 * tab
2375 */
2376 output -= 1;
2377 output[0] = '\t';
2378 }
2379 }
2380 remove = 0;
2381 }
2382 if (remove)
2383 continue;
2384 length = strlen(output);
2385 if (write_in_full(out_fd, output, length) != length) {
2386 ret = write_error(get_lock_file_path(lock));
2387 goto out;
2388 }
2389 }
2390 fclose(config_file);
2391 unlock_and_out:
2392 if (commit_lock_file(lock) < 0)
2393 ret = error("could not write config file %s: %s",
2394 config_filename, strerror(errno));
2395 out:
2396 free(filename_buf);
2397 return ret;
2398 }
2399
2400 int git_config_rename_section(const char *old_name, const char *new_name)
2401 {
2402 return git_config_rename_section_in_file(NULL, old_name, new_name);
2403 }
2404
2405 /*
2406 * Call this to report error for your variable that should not
2407 * get a boolean value (i.e. "[my] var" means "true").
2408 */
2409 #undef config_error_nonbool
2410 int config_error_nonbool(const char *var)
2411 {
2412 return error("missing value for '%s'", var);
2413 }
2414
2415 int parse_config_key(const char *var,
2416 const char *section,
2417 const char **subsection, int *subsection_len,
2418 const char **key)
2419 {
2420 int section_len = strlen(section);
2421 const char *dot;
2422
2423 /* Does it start with "section." ? */
2424 if (!starts_with(var, section) || var[section_len] != '.')
2425 return -1;
2426
2427 /*
2428 * Find the key; we don't know yet if we have a subsection, but we must
2429 * parse backwards from the end, since the subsection may have dots in
2430 * it, too.
2431 */
2432 dot = strrchr(var, '.');
2433 *key = dot + 1;
2434
2435 /* Did we have a subsection at all? */
2436 if (dot == var + section_len) {
2437 *subsection = NULL;
2438 *subsection_len = 0;
2439 }
2440 else {
2441 *subsection = var + section_len + 1;
2442 *subsection_len = dot - *subsection;
2443 }
2444
2445 return 0;
2446 }
2447
2448 const char *current_config_origin_type(void)
2449 {
2450 return cf && cf->origin_type ? cf->origin_type : "command line";
2451 }
2452
2453 const char *current_config_name(void)
2454 {
2455 return cf && cf->name ? cf->name : "";
2456 }
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