Merge branch 'jk/flockfile-stdio'
[git/git.git] / config.c
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 "config.h"
10 #include "repository.h"
11 #include "lockfile.h"
12 #include "exec_cmd.h"
13 #include "strbuf.h"
14 #include "quote.h"
15 #include "hashmap.h"
16 #include "string-list.h"
17 #include "utf8.h"
18 #include "dir.h"
19
20 struct config_source {
21 struct config_source *prev;
22 union {
23 FILE *file;
24 struct config_buf {
25 const char *buf;
26 size_t len;
27 size_t pos;
28 } buf;
29 } u;
30 enum config_origin_type origin_type;
31 const char *name;
32 const char *path;
33 int die_on_error;
34 int linenr;
35 int eof;
36 struct strbuf value;
37 struct strbuf var;
38
39 int (*do_fgetc)(struct config_source *c);
40 int (*do_ungetc)(int c, struct config_source *conf);
41 long (*do_ftell)(struct config_source *c);
42 };
43
44 /*
45 * These variables record the "current" config source, which
46 * can be accessed by parsing callbacks.
47 *
48 * The "cf" variable will be non-NULL only when we are actually parsing a real
49 * config source (file, blob, cmdline, etc).
50 *
51 * The "current_config_kvi" variable will be non-NULL only when we are feeding
52 * cached config from a configset into a callback.
53 *
54 * They should generally never be non-NULL at the same time. If they are both
55 * NULL, then we aren't parsing anything (and depending on the function looking
56 * at the variables, it's either a bug for it to be called in the first place,
57 * or it's a function which can be reused for non-config purposes, and should
58 * fall back to some sane behavior).
59 */
60 static struct config_source *cf;
61 static struct key_value_info *current_config_kvi;
62
63 /*
64 * Similar to the variables above, this gives access to the "scope" of the
65 * current value (repo, global, etc). For cached values, it can be found via
66 * the current_config_kvi as above. During parsing, the current value can be
67 * found in this variable. It's not part of "cf" because it transcends a single
68 * file (i.e., a file included from .git/config is still in "repo" scope).
69 */
70 static enum config_scope current_parsing_scope;
71
72 static int core_compression_seen;
73 static int pack_compression_seen;
74 static int zlib_compression_seen;
75
76 static int config_file_fgetc(struct config_source *conf)
77 {
78 return getc_unlocked(conf->u.file);
79 }
80
81 static int config_file_ungetc(int c, struct config_source *conf)
82 {
83 return ungetc(c, conf->u.file);
84 }
85
86 static long config_file_ftell(struct config_source *conf)
87 {
88 return ftell(conf->u.file);
89 }
90
91
92 static int config_buf_fgetc(struct config_source *conf)
93 {
94 if (conf->u.buf.pos < conf->u.buf.len)
95 return conf->u.buf.buf[conf->u.buf.pos++];
96
97 return EOF;
98 }
99
100 static int config_buf_ungetc(int c, struct config_source *conf)
101 {
102 if (conf->u.buf.pos > 0) {
103 conf->u.buf.pos--;
104 if (conf->u.buf.buf[conf->u.buf.pos] != c)
105 die("BUG: config_buf can only ungetc the same character");
106 return c;
107 }
108
109 return EOF;
110 }
111
112 static long config_buf_ftell(struct config_source *conf)
113 {
114 return conf->u.buf.pos;
115 }
116
117 #define MAX_INCLUDE_DEPTH 10
118 static const char include_depth_advice[] =
119 "exceeded maximum include depth (%d) while including\n"
120 " %s\n"
121 "from\n"
122 " %s\n"
123 "Do you have circular includes?";
124 static int handle_path_include(const char *path, struct config_include_data *inc)
125 {
126 int ret = 0;
127 struct strbuf buf = STRBUF_INIT;
128 char *expanded;
129
130 if (!path)
131 return config_error_nonbool("include.path");
132
133 expanded = expand_user_path(path, 0);
134 if (!expanded)
135 return error("could not expand include path '%s'", path);
136 path = expanded;
137
138 /*
139 * Use an absolute path as-is, but interpret relative paths
140 * based on the including config file.
141 */
142 if (!is_absolute_path(path)) {
143 char *slash;
144
145 if (!cf || !cf->path)
146 return error("relative config includes must come from files");
147
148 slash = find_last_dir_sep(cf->path);
149 if (slash)
150 strbuf_add(&buf, cf->path, slash - cf->path + 1);
151 strbuf_addstr(&buf, path);
152 path = buf.buf;
153 }
154
155 if (!access_or_die(path, R_OK, 0)) {
156 if (++inc->depth > MAX_INCLUDE_DEPTH)
157 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
158 !cf ? "<unknown>" :
159 cf->name ? cf->name :
160 "the command line");
161 ret = git_config_from_file(git_config_include, path, inc);
162 inc->depth--;
163 }
164 strbuf_release(&buf);
165 free(expanded);
166 return ret;
167 }
168
169 static int prepare_include_condition_pattern(struct strbuf *pat)
170 {
171 struct strbuf path = STRBUF_INIT;
172 char *expanded;
173 int prefix = 0;
174
175 expanded = expand_user_path(pat->buf, 1);
176 if (expanded) {
177 strbuf_reset(pat);
178 strbuf_addstr(pat, expanded);
179 free(expanded);
180 }
181
182 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
183 const char *slash;
184
185 if (!cf || !cf->path)
186 return error(_("relative config include "
187 "conditionals must come from files"));
188
189 strbuf_realpath(&path, cf->path, 1);
190 slash = find_last_dir_sep(path.buf);
191 if (!slash)
192 die("BUG: how is this possible?");
193 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
194 prefix = slash - path.buf + 1 /* slash */;
195 } else if (!is_absolute_path(pat->buf))
196 strbuf_insert(pat, 0, "**/", 3);
197
198 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
199 strbuf_addstr(pat, "**");
200
201 strbuf_release(&path);
202 return prefix;
203 }
204
205 static int include_by_gitdir(const struct config_options *opts,
206 const char *cond, size_t cond_len, int icase)
207 {
208 struct strbuf text = STRBUF_INIT;
209 struct strbuf pattern = STRBUF_INIT;
210 int ret = 0, prefix;
211 const char *git_dir;
212 int already_tried_absolute = 0;
213
214 if (opts->git_dir)
215 git_dir = opts->git_dir;
216 else
217 goto done;
218
219 strbuf_realpath(&text, git_dir, 1);
220 strbuf_add(&pattern, cond, cond_len);
221 prefix = prepare_include_condition_pattern(&pattern);
222
223 again:
224 if (prefix < 0)
225 goto done;
226
227 if (prefix > 0) {
228 /*
229 * perform literal matching on the prefix part so that
230 * any wildcard character in it can't create side effects.
231 */
232 if (text.len < prefix)
233 goto done;
234 if (!icase && strncmp(pattern.buf, text.buf, prefix))
235 goto done;
236 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
237 goto done;
238 }
239
240 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
241 icase ? WM_CASEFOLD : 0);
242
243 if (!ret && !already_tried_absolute) {
244 /*
245 * We've tried e.g. matching gitdir:~/work, but if
246 * ~/work is a symlink to /mnt/storage/work
247 * strbuf_realpath() will expand it, so the rule won't
248 * match. Let's match against a
249 * strbuf_add_absolute_path() version of the path,
250 * which'll do the right thing
251 */
252 strbuf_reset(&text);
253 strbuf_add_absolute_path(&text, git_dir);
254 already_tried_absolute = 1;
255 goto again;
256 }
257 done:
258 strbuf_release(&pattern);
259 strbuf_release(&text);
260 return ret;
261 }
262
263 static int include_condition_is_true(const struct config_options *opts,
264 const char *cond, size_t cond_len)
265 {
266
267 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
268 return include_by_gitdir(opts, cond, cond_len, 0);
269 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
270 return include_by_gitdir(opts, cond, cond_len, 1);
271
272 /* unknown conditionals are always false */
273 return 0;
274 }
275
276 int git_config_include(const char *var, const char *value, void *data)
277 {
278 struct config_include_data *inc = data;
279 const char *cond, *key;
280 int cond_len;
281 int ret;
282
283 /*
284 * Pass along all values, including "include" directives; this makes it
285 * possible to query information on the includes themselves.
286 */
287 ret = inc->fn(var, value, inc->data);
288 if (ret < 0)
289 return ret;
290
291 if (!strcmp(var, "include.path"))
292 ret = handle_path_include(value, inc);
293
294 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
295 (cond && include_condition_is_true(inc->opts, cond, cond_len)) &&
296 !strcmp(key, "path"))
297 ret = handle_path_include(value, inc);
298
299 return ret;
300 }
301
302 void git_config_push_parameter(const char *text)
303 {
304 struct strbuf env = STRBUF_INIT;
305 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
306 if (old && *old) {
307 strbuf_addstr(&env, old);
308 strbuf_addch(&env, ' ');
309 }
310 sq_quote_buf(&env, text);
311 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
312 strbuf_release(&env);
313 }
314
315 static inline int iskeychar(int c)
316 {
317 return isalnum(c) || c == '-';
318 }
319
320 /*
321 * Auxiliary function to sanity-check and split the key into the section
322 * identifier and variable name.
323 *
324 * Returns 0 on success, -1 when there is an invalid character in the key and
325 * -2 if there is no section name in the key.
326 *
327 * store_key - pointer to char* which will hold a copy of the key with
328 * lowercase section and variable name
329 * baselen - pointer to int which will hold the length of the
330 * section + subsection part, can be NULL
331 */
332 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
333 {
334 int i, dot, baselen;
335 const char *last_dot = strrchr(key, '.');
336
337 /*
338 * Since "key" actually contains the section name and the real
339 * key name separated by a dot, we have to know where the dot is.
340 */
341
342 if (last_dot == NULL || last_dot == key) {
343 if (!quiet)
344 error("key does not contain a section: %s", key);
345 return -CONFIG_NO_SECTION_OR_NAME;
346 }
347
348 if (!last_dot[1]) {
349 if (!quiet)
350 error("key does not contain variable name: %s", key);
351 return -CONFIG_NO_SECTION_OR_NAME;
352 }
353
354 baselen = last_dot - key;
355 if (baselen_)
356 *baselen_ = baselen;
357
358 /*
359 * Validate the key and while at it, lower case it for matching.
360 */
361 if (store_key)
362 *store_key = xmallocz(strlen(key));
363
364 dot = 0;
365 for (i = 0; key[i]; i++) {
366 unsigned char c = key[i];
367 if (c == '.')
368 dot = 1;
369 /* Leave the extended basename untouched.. */
370 if (!dot || i > baselen) {
371 if (!iskeychar(c) ||
372 (i == baselen + 1 && !isalpha(c))) {
373 if (!quiet)
374 error("invalid key: %s", key);
375 goto out_free_ret_1;
376 }
377 c = tolower(c);
378 } else if (c == '\n') {
379 if (!quiet)
380 error("invalid key (newline): %s", key);
381 goto out_free_ret_1;
382 }
383 if (store_key)
384 (*store_key)[i] = c;
385 }
386
387 return 0;
388
389 out_free_ret_1:
390 if (store_key) {
391 FREE_AND_NULL(*store_key);
392 }
393 return -CONFIG_INVALID_KEY;
394 }
395
396 int git_config_parse_key(const char *key, char **store_key, int *baselen)
397 {
398 return git_config_parse_key_1(key, store_key, baselen, 0);
399 }
400
401 int git_config_key_is_valid(const char *key)
402 {
403 return !git_config_parse_key_1(key, NULL, NULL, 1);
404 }
405
406 int git_config_parse_parameter(const char *text,
407 config_fn_t fn, void *data)
408 {
409 const char *value;
410 char *canonical_name;
411 struct strbuf **pair;
412 int ret;
413
414 pair = strbuf_split_str(text, '=', 2);
415 if (!pair[0])
416 return error("bogus config parameter: %s", text);
417
418 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
419 strbuf_setlen(pair[0], pair[0]->len - 1);
420 value = pair[1] ? pair[1]->buf : "";
421 } else {
422 value = NULL;
423 }
424
425 strbuf_trim(pair[0]);
426 if (!pair[0]->len) {
427 strbuf_list_free(pair);
428 return error("bogus config parameter: %s", text);
429 }
430
431 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
432 ret = -1;
433 } else {
434 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
435 free(canonical_name);
436 }
437 strbuf_list_free(pair);
438 return ret;
439 }
440
441 int git_config_from_parameters(config_fn_t fn, void *data)
442 {
443 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
444 int ret = 0;
445 char *envw;
446 const char **argv = NULL;
447 int nr = 0, alloc = 0;
448 int i;
449 struct config_source source;
450
451 if (!env)
452 return 0;
453
454 memset(&source, 0, sizeof(source));
455 source.prev = cf;
456 source.origin_type = CONFIG_ORIGIN_CMDLINE;
457 cf = &source;
458
459 /* sq_dequote will write over it */
460 envw = xstrdup(env);
461
462 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
463 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
464 goto out;
465 }
466
467 for (i = 0; i < nr; i++) {
468 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
469 ret = -1;
470 goto out;
471 }
472 }
473
474 out:
475 free(argv);
476 free(envw);
477 cf = source.prev;
478 return ret;
479 }
480
481 static int get_next_char(void)
482 {
483 int c = cf->do_fgetc(cf);
484
485 if (c == '\r') {
486 /* DOS like systems */
487 c = cf->do_fgetc(cf);
488 if (c != '\n') {
489 if (c != EOF)
490 cf->do_ungetc(c, cf);
491 c = '\r';
492 }
493 }
494 if (c == '\n')
495 cf->linenr++;
496 if (c == EOF) {
497 cf->eof = 1;
498 cf->linenr++;
499 c = '\n';
500 }
501 return c;
502 }
503
504 static char *parse_value(void)
505 {
506 int quote = 0, comment = 0, space = 0;
507
508 strbuf_reset(&cf->value);
509 for (;;) {
510 int c = get_next_char();
511 if (c == '\n') {
512 if (quote) {
513 cf->linenr--;
514 return NULL;
515 }
516 return cf->value.buf;
517 }
518 if (comment)
519 continue;
520 if (isspace(c) && !quote) {
521 if (cf->value.len)
522 space++;
523 continue;
524 }
525 if (!quote) {
526 if (c == ';' || c == '#') {
527 comment = 1;
528 continue;
529 }
530 }
531 for (; space; space--)
532 strbuf_addch(&cf->value, ' ');
533 if (c == '\\') {
534 c = get_next_char();
535 switch (c) {
536 case '\n':
537 continue;
538 case 't':
539 c = '\t';
540 break;
541 case 'b':
542 c = '\b';
543 break;
544 case 'n':
545 c = '\n';
546 break;
547 /* Some characters escape as themselves */
548 case '\\': case '"':
549 break;
550 /* Reject unknown escape sequences */
551 default:
552 return NULL;
553 }
554 strbuf_addch(&cf->value, c);
555 continue;
556 }
557 if (c == '"') {
558 quote = 1-quote;
559 continue;
560 }
561 strbuf_addch(&cf->value, c);
562 }
563 }
564
565 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
566 {
567 int c;
568 char *value;
569 int ret;
570
571 /* Get the full name */
572 for (;;) {
573 c = get_next_char();
574 if (cf->eof)
575 break;
576 if (!iskeychar(c))
577 break;
578 strbuf_addch(name, tolower(c));
579 }
580
581 while (c == ' ' || c == '\t')
582 c = get_next_char();
583
584 value = NULL;
585 if (c != '\n') {
586 if (c != '=')
587 return -1;
588 value = parse_value();
589 if (!value)
590 return -1;
591 }
592 /*
593 * We already consumed the \n, but we need linenr to point to
594 * the line we just parsed during the call to fn to get
595 * accurate line number in error messages.
596 */
597 cf->linenr--;
598 ret = fn(name->buf, value, data);
599 if (ret >= 0)
600 cf->linenr++;
601 return ret;
602 }
603
604 static int get_extended_base_var(struct strbuf *name, int c)
605 {
606 do {
607 if (c == '\n')
608 goto error_incomplete_line;
609 c = get_next_char();
610 } while (isspace(c));
611
612 /* We require the format to be '[base "extension"]' */
613 if (c != '"')
614 return -1;
615 strbuf_addch(name, '.');
616
617 for (;;) {
618 int c = get_next_char();
619 if (c == '\n')
620 goto error_incomplete_line;
621 if (c == '"')
622 break;
623 if (c == '\\') {
624 c = get_next_char();
625 if (c == '\n')
626 goto error_incomplete_line;
627 }
628 strbuf_addch(name, c);
629 }
630
631 /* Final ']' */
632 if (get_next_char() != ']')
633 return -1;
634 return 0;
635 error_incomplete_line:
636 cf->linenr--;
637 return -1;
638 }
639
640 static int get_base_var(struct strbuf *name)
641 {
642 for (;;) {
643 int c = get_next_char();
644 if (cf->eof)
645 return -1;
646 if (c == ']')
647 return 0;
648 if (isspace(c))
649 return get_extended_base_var(name, c);
650 if (!iskeychar(c) && c != '.')
651 return -1;
652 strbuf_addch(name, tolower(c));
653 }
654 }
655
656 static int git_parse_source(config_fn_t fn, void *data)
657 {
658 int comment = 0;
659 int baselen = 0;
660 struct strbuf *var = &cf->var;
661 int error_return = 0;
662 char *error_msg = NULL;
663
664 /* U+FEFF Byte Order Mark in UTF8 */
665 const char *bomptr = utf8_bom;
666
667 for (;;) {
668 int c = get_next_char();
669 if (bomptr && *bomptr) {
670 /* We are at the file beginning; skip UTF8-encoded BOM
671 * if present. Sane editors won't put this in on their
672 * own, but e.g. Windows Notepad will do it happily. */
673 if (c == (*bomptr & 0377)) {
674 bomptr++;
675 continue;
676 } else {
677 /* Do not tolerate partial BOM. */
678 if (bomptr != utf8_bom)
679 break;
680 /* No BOM at file beginning. Cool. */
681 bomptr = NULL;
682 }
683 }
684 if (c == '\n') {
685 if (cf->eof)
686 return 0;
687 comment = 0;
688 continue;
689 }
690 if (comment || isspace(c))
691 continue;
692 if (c == '#' || c == ';') {
693 comment = 1;
694 continue;
695 }
696 if (c == '[') {
697 /* Reset prior to determining a new stem */
698 strbuf_reset(var);
699 if (get_base_var(var) < 0 || var->len < 1)
700 break;
701 strbuf_addch(var, '.');
702 baselen = var->len;
703 continue;
704 }
705 if (!isalpha(c))
706 break;
707 /*
708 * Truncate the var name back to the section header
709 * stem prior to grabbing the suffix part of the name
710 * and the value.
711 */
712 strbuf_setlen(var, baselen);
713 strbuf_addch(var, tolower(c));
714 if (get_value(fn, data, var) < 0)
715 break;
716 }
717
718 switch (cf->origin_type) {
719 case CONFIG_ORIGIN_BLOB:
720 error_msg = xstrfmt(_("bad config line %d in blob %s"),
721 cf->linenr, cf->name);
722 break;
723 case CONFIG_ORIGIN_FILE:
724 error_msg = xstrfmt(_("bad config line %d in file %s"),
725 cf->linenr, cf->name);
726 break;
727 case CONFIG_ORIGIN_STDIN:
728 error_msg = xstrfmt(_("bad config line %d in standard input"),
729 cf->linenr);
730 break;
731 case CONFIG_ORIGIN_SUBMODULE_BLOB:
732 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
733 cf->linenr, cf->name);
734 break;
735 case CONFIG_ORIGIN_CMDLINE:
736 error_msg = xstrfmt(_("bad config line %d in command line %s"),
737 cf->linenr, cf->name);
738 break;
739 default:
740 error_msg = xstrfmt(_("bad config line %d in %s"),
741 cf->linenr, cf->name);
742 }
743
744 if (cf->die_on_error)
745 die("%s", error_msg);
746 else
747 error_return = error("%s", error_msg);
748
749 free(error_msg);
750 return error_return;
751 }
752
753 static int parse_unit_factor(const char *end, uintmax_t *val)
754 {
755 if (!*end)
756 return 1;
757 else if (!strcasecmp(end, "k")) {
758 *val *= 1024;
759 return 1;
760 }
761 else if (!strcasecmp(end, "m")) {
762 *val *= 1024 * 1024;
763 return 1;
764 }
765 else if (!strcasecmp(end, "g")) {
766 *val *= 1024 * 1024 * 1024;
767 return 1;
768 }
769 return 0;
770 }
771
772 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
773 {
774 if (value && *value) {
775 char *end;
776 intmax_t val;
777 uintmax_t uval;
778 uintmax_t factor = 1;
779
780 errno = 0;
781 val = strtoimax(value, &end, 0);
782 if (errno == ERANGE)
783 return 0;
784 if (!parse_unit_factor(end, &factor)) {
785 errno = EINVAL;
786 return 0;
787 }
788 uval = labs(val);
789 uval *= factor;
790 if (uval > max || labs(val) > uval) {
791 errno = ERANGE;
792 return 0;
793 }
794 val *= factor;
795 *ret = val;
796 return 1;
797 }
798 errno = EINVAL;
799 return 0;
800 }
801
802 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
803 {
804 if (value && *value) {
805 char *end;
806 uintmax_t val;
807 uintmax_t oldval;
808
809 errno = 0;
810 val = strtoumax(value, &end, 0);
811 if (errno == ERANGE)
812 return 0;
813 oldval = val;
814 if (!parse_unit_factor(end, &val)) {
815 errno = EINVAL;
816 return 0;
817 }
818 if (val > max || oldval > val) {
819 errno = ERANGE;
820 return 0;
821 }
822 *ret = val;
823 return 1;
824 }
825 errno = EINVAL;
826 return 0;
827 }
828
829 static int git_parse_int(const char *value, int *ret)
830 {
831 intmax_t tmp;
832 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
833 return 0;
834 *ret = tmp;
835 return 1;
836 }
837
838 static int git_parse_int64(const char *value, int64_t *ret)
839 {
840 intmax_t tmp;
841 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
842 return 0;
843 *ret = tmp;
844 return 1;
845 }
846
847 int git_parse_ulong(const char *value, unsigned long *ret)
848 {
849 uintmax_t tmp;
850 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
851 return 0;
852 *ret = tmp;
853 return 1;
854 }
855
856 static int git_parse_ssize_t(const char *value, ssize_t *ret)
857 {
858 intmax_t tmp;
859 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
860 return 0;
861 *ret = tmp;
862 return 1;
863 }
864
865 NORETURN
866 static void die_bad_number(const char *name, const char *value)
867 {
868 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
869
870 if (!value)
871 value = "";
872
873 if (!(cf && cf->name))
874 die(_("bad numeric config value '%s' for '%s': %s"),
875 value, name, error_type);
876
877 switch (cf->origin_type) {
878 case CONFIG_ORIGIN_BLOB:
879 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
880 value, name, cf->name, error_type);
881 case CONFIG_ORIGIN_FILE:
882 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
883 value, name, cf->name, error_type);
884 case CONFIG_ORIGIN_STDIN:
885 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
886 value, name, error_type);
887 case CONFIG_ORIGIN_SUBMODULE_BLOB:
888 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
889 value, name, cf->name, error_type);
890 case CONFIG_ORIGIN_CMDLINE:
891 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
892 value, name, cf->name, error_type);
893 default:
894 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
895 value, name, cf->name, error_type);
896 }
897 }
898
899 int git_config_int(const char *name, const char *value)
900 {
901 int ret;
902 if (!git_parse_int(value, &ret))
903 die_bad_number(name, value);
904 return ret;
905 }
906
907 int64_t git_config_int64(const char *name, const char *value)
908 {
909 int64_t ret;
910 if (!git_parse_int64(value, &ret))
911 die_bad_number(name, value);
912 return ret;
913 }
914
915 unsigned long git_config_ulong(const char *name, const char *value)
916 {
917 unsigned long ret;
918 if (!git_parse_ulong(value, &ret))
919 die_bad_number(name, value);
920 return ret;
921 }
922
923 ssize_t git_config_ssize_t(const char *name, const char *value)
924 {
925 ssize_t ret;
926 if (!git_parse_ssize_t(value, &ret))
927 die_bad_number(name, value);
928 return ret;
929 }
930
931 static int git_parse_maybe_bool_text(const char *value)
932 {
933 if (!value)
934 return 1;
935 if (!*value)
936 return 0;
937 if (!strcasecmp(value, "true")
938 || !strcasecmp(value, "yes")
939 || !strcasecmp(value, "on"))
940 return 1;
941 if (!strcasecmp(value, "false")
942 || !strcasecmp(value, "no")
943 || !strcasecmp(value, "off"))
944 return 0;
945 return -1;
946 }
947
948 int git_parse_maybe_bool(const char *value)
949 {
950 int v = git_parse_maybe_bool_text(value);
951 if (0 <= v)
952 return v;
953 if (git_parse_int(value, &v))
954 return !!v;
955 return -1;
956 }
957
958 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
959 {
960 int v = git_parse_maybe_bool_text(value);
961 if (0 <= v) {
962 *is_bool = 1;
963 return v;
964 }
965 *is_bool = 0;
966 return git_config_int(name, value);
967 }
968
969 int git_config_bool(const char *name, const char *value)
970 {
971 int discard;
972 return !!git_config_bool_or_int(name, value, &discard);
973 }
974
975 int git_config_string(const char **dest, const char *var, const char *value)
976 {
977 if (!value)
978 return config_error_nonbool(var);
979 *dest = xstrdup(value);
980 return 0;
981 }
982
983 int git_config_pathname(const char **dest, const char *var, const char *value)
984 {
985 if (!value)
986 return config_error_nonbool(var);
987 *dest = expand_user_path(value, 0);
988 if (!*dest)
989 die(_("failed to expand user dir in: '%s'"), value);
990 return 0;
991 }
992
993 int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
994 {
995 if (!value)
996 return config_error_nonbool(var);
997 if (parse_expiry_date(value, timestamp))
998 return error(_("'%s' for '%s' is not a valid timestamp"),
999 value, var);
1000 return 0;
1001 }
1002
1003 static int git_default_core_config(const char *var, const char *value)
1004 {
1005 /* This needs a better name */
1006 if (!strcmp(var, "core.filemode")) {
1007 trust_executable_bit = git_config_bool(var, value);
1008 return 0;
1009 }
1010 if (!strcmp(var, "core.trustctime")) {
1011 trust_ctime = git_config_bool(var, value);
1012 return 0;
1013 }
1014 if (!strcmp(var, "core.checkstat")) {
1015 if (!strcasecmp(value, "default"))
1016 check_stat = 1;
1017 else if (!strcasecmp(value, "minimal"))
1018 check_stat = 0;
1019 }
1020
1021 if (!strcmp(var, "core.quotepath")) {
1022 quote_path_fully = git_config_bool(var, value);
1023 return 0;
1024 }
1025
1026 if (!strcmp(var, "core.symlinks")) {
1027 has_symlinks = git_config_bool(var, value);
1028 return 0;
1029 }
1030
1031 if (!strcmp(var, "core.ignorecase")) {
1032 ignore_case = git_config_bool(var, value);
1033 return 0;
1034 }
1035
1036 if (!strcmp(var, "core.attributesfile"))
1037 return git_config_pathname(&git_attributes_file, var, value);
1038
1039 if (!strcmp(var, "core.hookspath"))
1040 return git_config_pathname(&git_hooks_path, var, value);
1041
1042 if (!strcmp(var, "core.bare")) {
1043 is_bare_repository_cfg = git_config_bool(var, value);
1044 return 0;
1045 }
1046
1047 if (!strcmp(var, "core.ignorestat")) {
1048 assume_unchanged = git_config_bool(var, value);
1049 return 0;
1050 }
1051
1052 if (!strcmp(var, "core.prefersymlinkrefs")) {
1053 prefer_symlink_refs = git_config_bool(var, value);
1054 return 0;
1055 }
1056
1057 if (!strcmp(var, "core.logallrefupdates")) {
1058 if (value && !strcasecmp(value, "always"))
1059 log_all_ref_updates = LOG_REFS_ALWAYS;
1060 else if (git_config_bool(var, value))
1061 log_all_ref_updates = LOG_REFS_NORMAL;
1062 else
1063 log_all_ref_updates = LOG_REFS_NONE;
1064 return 0;
1065 }
1066
1067 if (!strcmp(var, "core.warnambiguousrefs")) {
1068 warn_ambiguous_refs = git_config_bool(var, value);
1069 return 0;
1070 }
1071
1072 if (!strcmp(var, "core.abbrev")) {
1073 if (!value)
1074 return config_error_nonbool(var);
1075 if (!strcasecmp(value, "auto"))
1076 default_abbrev = -1;
1077 else {
1078 int abbrev = git_config_int(var, value);
1079 if (abbrev < minimum_abbrev || abbrev > 40)
1080 return error("abbrev length out of range: %d", abbrev);
1081 default_abbrev = abbrev;
1082 }
1083 return 0;
1084 }
1085
1086 if (!strcmp(var, "core.disambiguate"))
1087 return set_disambiguate_hint_config(var, value);
1088
1089 if (!strcmp(var, "core.loosecompression")) {
1090 int level = git_config_int(var, value);
1091 if (level == -1)
1092 level = Z_DEFAULT_COMPRESSION;
1093 else if (level < 0 || level > Z_BEST_COMPRESSION)
1094 die(_("bad zlib compression level %d"), level);
1095 zlib_compression_level = level;
1096 zlib_compression_seen = 1;
1097 return 0;
1098 }
1099
1100 if (!strcmp(var, "core.compression")) {
1101 int level = git_config_int(var, value);
1102 if (level == -1)
1103 level = Z_DEFAULT_COMPRESSION;
1104 else if (level < 0 || level > Z_BEST_COMPRESSION)
1105 die(_("bad zlib compression level %d"), level);
1106 core_compression_level = level;
1107 core_compression_seen = 1;
1108 if (!zlib_compression_seen)
1109 zlib_compression_level = level;
1110 if (!pack_compression_seen)
1111 pack_compression_level = level;
1112 return 0;
1113 }
1114
1115 if (!strcmp(var, "core.packedgitwindowsize")) {
1116 int pgsz_x2 = getpagesize() * 2;
1117 packed_git_window_size = git_config_ulong(var, value);
1118
1119 /* This value must be multiple of (pagesize * 2) */
1120 packed_git_window_size /= pgsz_x2;
1121 if (packed_git_window_size < 1)
1122 packed_git_window_size = 1;
1123 packed_git_window_size *= pgsz_x2;
1124 return 0;
1125 }
1126
1127 if (!strcmp(var, "core.bigfilethreshold")) {
1128 big_file_threshold = git_config_ulong(var, value);
1129 return 0;
1130 }
1131
1132 if (!strcmp(var, "core.packedgitlimit")) {
1133 packed_git_limit = git_config_ulong(var, value);
1134 return 0;
1135 }
1136
1137 if (!strcmp(var, "core.deltabasecachelimit")) {
1138 delta_base_cache_limit = git_config_ulong(var, value);
1139 return 0;
1140 }
1141
1142 if (!strcmp(var, "core.autocrlf")) {
1143 if (value && !strcasecmp(value, "input")) {
1144 auto_crlf = AUTO_CRLF_INPUT;
1145 return 0;
1146 }
1147 auto_crlf = git_config_bool(var, value);
1148 return 0;
1149 }
1150
1151 if (!strcmp(var, "core.safecrlf")) {
1152 int eol_rndtrp_die;
1153 if (value && !strcasecmp(value, "warn")) {
1154 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1155 return 0;
1156 }
1157 eol_rndtrp_die = git_config_bool(var, value);
1158 global_conv_flags_eol = eol_rndtrp_die ?
1159 CONV_EOL_RNDTRP_DIE : CONV_EOL_RNDTRP_WARN;
1160 return 0;
1161 }
1162
1163 if (!strcmp(var, "core.eol")) {
1164 if (value && !strcasecmp(value, "lf"))
1165 core_eol = EOL_LF;
1166 else if (value && !strcasecmp(value, "crlf"))
1167 core_eol = EOL_CRLF;
1168 else if (value && !strcasecmp(value, "native"))
1169 core_eol = EOL_NATIVE;
1170 else
1171 core_eol = EOL_UNSET;
1172 return 0;
1173 }
1174
1175 if (!strcmp(var, "core.notesref")) {
1176 notes_ref_name = xstrdup(value);
1177 return 0;
1178 }
1179
1180 if (!strcmp(var, "core.editor"))
1181 return git_config_string(&editor_program, var, value);
1182
1183 if (!strcmp(var, "core.commentchar")) {
1184 if (!value)
1185 return config_error_nonbool(var);
1186 else if (!strcasecmp(value, "auto"))
1187 auto_comment_line_char = 1;
1188 else if (value[0] && !value[1]) {
1189 comment_line_char = value[0];
1190 auto_comment_line_char = 0;
1191 } else
1192 return error("core.commentChar should only be one character");
1193 return 0;
1194 }
1195
1196 if (!strcmp(var, "core.askpass"))
1197 return git_config_string(&askpass_program, var, value);
1198
1199 if (!strcmp(var, "core.excludesfile"))
1200 return git_config_pathname(&excludes_file, var, value);
1201
1202 if (!strcmp(var, "core.whitespace")) {
1203 if (!value)
1204 return config_error_nonbool(var);
1205 whitespace_rule_cfg = parse_whitespace_rule(value);
1206 return 0;
1207 }
1208
1209 if (!strcmp(var, "core.fsyncobjectfiles")) {
1210 fsync_object_files = git_config_bool(var, value);
1211 return 0;
1212 }
1213
1214 if (!strcmp(var, "core.preloadindex")) {
1215 core_preload_index = git_config_bool(var, value);
1216 return 0;
1217 }
1218
1219 if (!strcmp(var, "core.createobject")) {
1220 if (!strcmp(value, "rename"))
1221 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1222 else if (!strcmp(value, "link"))
1223 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1224 else
1225 die(_("invalid mode for object creation: %s"), value);
1226 return 0;
1227 }
1228
1229 if (!strcmp(var, "core.sparsecheckout")) {
1230 core_apply_sparse_checkout = git_config_bool(var, value);
1231 return 0;
1232 }
1233
1234 if (!strcmp(var, "core.precomposeunicode")) {
1235 precomposed_unicode = git_config_bool(var, value);
1236 return 0;
1237 }
1238
1239 if (!strcmp(var, "core.protecthfs")) {
1240 protect_hfs = git_config_bool(var, value);
1241 return 0;
1242 }
1243
1244 if (!strcmp(var, "core.protectntfs")) {
1245 protect_ntfs = git_config_bool(var, value);
1246 return 0;
1247 }
1248
1249 if (!strcmp(var, "core.hidedotfiles")) {
1250 if (value && !strcasecmp(value, "dotgitonly"))
1251 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1252 else
1253 hide_dotfiles = git_config_bool(var, value);
1254 return 0;
1255 }
1256
1257 if (!strcmp(var, "core.partialclonefilter")) {
1258 return git_config_string(&core_partial_clone_filter_default,
1259 var, value);
1260 }
1261
1262 /* Add other config variables here and to Documentation/config.txt. */
1263 return 0;
1264 }
1265
1266 static int git_default_i18n_config(const char *var, const char *value)
1267 {
1268 if (!strcmp(var, "i18n.commitencoding"))
1269 return git_config_string(&git_commit_encoding, var, value);
1270
1271 if (!strcmp(var, "i18n.logoutputencoding"))
1272 return git_config_string(&git_log_output_encoding, var, value);
1273
1274 /* Add other config variables here and to Documentation/config.txt. */
1275 return 0;
1276 }
1277
1278 static int git_default_branch_config(const char *var, const char *value)
1279 {
1280 if (!strcmp(var, "branch.autosetupmerge")) {
1281 if (value && !strcasecmp(value, "always")) {
1282 git_branch_track = BRANCH_TRACK_ALWAYS;
1283 return 0;
1284 }
1285 git_branch_track = git_config_bool(var, value);
1286 return 0;
1287 }
1288 if (!strcmp(var, "branch.autosetuprebase")) {
1289 if (!value)
1290 return config_error_nonbool(var);
1291 else if (!strcmp(value, "never"))
1292 autorebase = AUTOREBASE_NEVER;
1293 else if (!strcmp(value, "local"))
1294 autorebase = AUTOREBASE_LOCAL;
1295 else if (!strcmp(value, "remote"))
1296 autorebase = AUTOREBASE_REMOTE;
1297 else if (!strcmp(value, "always"))
1298 autorebase = AUTOREBASE_ALWAYS;
1299 else
1300 return error("malformed value for %s", var);
1301 return 0;
1302 }
1303
1304 /* Add other config variables here and to Documentation/config.txt. */
1305 return 0;
1306 }
1307
1308 static int git_default_push_config(const char *var, const char *value)
1309 {
1310 if (!strcmp(var, "push.default")) {
1311 if (!value)
1312 return config_error_nonbool(var);
1313 else if (!strcmp(value, "nothing"))
1314 push_default = PUSH_DEFAULT_NOTHING;
1315 else if (!strcmp(value, "matching"))
1316 push_default = PUSH_DEFAULT_MATCHING;
1317 else if (!strcmp(value, "simple"))
1318 push_default = PUSH_DEFAULT_SIMPLE;
1319 else if (!strcmp(value, "upstream"))
1320 push_default = PUSH_DEFAULT_UPSTREAM;
1321 else if (!strcmp(value, "tracking")) /* deprecated */
1322 push_default = PUSH_DEFAULT_UPSTREAM;
1323 else if (!strcmp(value, "current"))
1324 push_default = PUSH_DEFAULT_CURRENT;
1325 else {
1326 error("malformed value for %s: %s", var, value);
1327 return error("Must be one of nothing, matching, simple, "
1328 "upstream or current.");
1329 }
1330 return 0;
1331 }
1332
1333 /* Add other config variables here and to Documentation/config.txt. */
1334 return 0;
1335 }
1336
1337 static int git_default_mailmap_config(const char *var, const char *value)
1338 {
1339 if (!strcmp(var, "mailmap.file"))
1340 return git_config_pathname(&git_mailmap_file, var, value);
1341 if (!strcmp(var, "mailmap.blob"))
1342 return git_config_string(&git_mailmap_blob, var, value);
1343
1344 /* Add other config variables here and to Documentation/config.txt. */
1345 return 0;
1346 }
1347
1348 int git_default_config(const char *var, const char *value, void *dummy)
1349 {
1350 if (starts_with(var, "core."))
1351 return git_default_core_config(var, value);
1352
1353 if (starts_with(var, "user."))
1354 return git_ident_config(var, value, dummy);
1355
1356 if (starts_with(var, "i18n."))
1357 return git_default_i18n_config(var, value);
1358
1359 if (starts_with(var, "branch."))
1360 return git_default_branch_config(var, value);
1361
1362 if (starts_with(var, "push."))
1363 return git_default_push_config(var, value);
1364
1365 if (starts_with(var, "mailmap."))
1366 return git_default_mailmap_config(var, value);
1367
1368 if (starts_with(var, "advice."))
1369 return git_default_advice_config(var, value);
1370
1371 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1372 pager_use_color = git_config_bool(var,value);
1373 return 0;
1374 }
1375
1376 if (!strcmp(var, "pack.packsizelimit")) {
1377 pack_size_limit_cfg = git_config_ulong(var, value);
1378 return 0;
1379 }
1380
1381 if (!strcmp(var, "pack.compression")) {
1382 int level = git_config_int(var, value);
1383 if (level == -1)
1384 level = Z_DEFAULT_COMPRESSION;
1385 else if (level < 0 || level > Z_BEST_COMPRESSION)
1386 die(_("bad pack compression level %d"), level);
1387 pack_compression_level = level;
1388 pack_compression_seen = 1;
1389 return 0;
1390 }
1391
1392 /* Add other config variables here and to Documentation/config.txt. */
1393 return 0;
1394 }
1395
1396 /*
1397 * All source specific fields in the union, die_on_error, name and the callbacks
1398 * fgetc, ungetc, ftell of top need to be initialized before calling
1399 * this function.
1400 */
1401 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1402 {
1403 int ret;
1404
1405 /* push config-file parsing state stack */
1406 top->prev = cf;
1407 top->linenr = 1;
1408 top->eof = 0;
1409 strbuf_init(&top->value, 1024);
1410 strbuf_init(&top->var, 1024);
1411 cf = top;
1412
1413 ret = git_parse_source(fn, data);
1414
1415 /* pop config-file parsing state stack */
1416 strbuf_release(&top->value);
1417 strbuf_release(&top->var);
1418 cf = top->prev;
1419
1420 return ret;
1421 }
1422
1423 static int do_config_from_file(config_fn_t fn,
1424 const enum config_origin_type origin_type,
1425 const char *name, const char *path, FILE *f,
1426 void *data)
1427 {
1428 struct config_source top;
1429 int ret;
1430
1431 top.u.file = f;
1432 top.origin_type = origin_type;
1433 top.name = name;
1434 top.path = path;
1435 top.die_on_error = 1;
1436 top.do_fgetc = config_file_fgetc;
1437 top.do_ungetc = config_file_ungetc;
1438 top.do_ftell = config_file_ftell;
1439
1440 flockfile(f);
1441 ret = do_config_from(&top, fn, data);
1442 funlockfile(f);
1443 return ret;
1444 }
1445
1446 static int git_config_from_stdin(config_fn_t fn, void *data)
1447 {
1448 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1449 }
1450
1451 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1452 {
1453 int ret = -1;
1454 FILE *f;
1455
1456 f = fopen_or_warn(filename, "r");
1457 if (f) {
1458 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1459 fclose(f);
1460 }
1461 return ret;
1462 }
1463
1464 int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1465 const char *name, const char *buf, size_t len, void *data)
1466 {
1467 struct config_source top;
1468
1469 top.u.buf.buf = buf;
1470 top.u.buf.len = len;
1471 top.u.buf.pos = 0;
1472 top.origin_type = origin_type;
1473 top.name = name;
1474 top.path = NULL;
1475 top.die_on_error = 0;
1476 top.do_fgetc = config_buf_fgetc;
1477 top.do_ungetc = config_buf_ungetc;
1478 top.do_ftell = config_buf_ftell;
1479
1480 return do_config_from(&top, fn, data);
1481 }
1482
1483 int git_config_from_blob_oid(config_fn_t fn,
1484 const char *name,
1485 const struct object_id *oid,
1486 void *data)
1487 {
1488 enum object_type type;
1489 char *buf;
1490 unsigned long size;
1491 int ret;
1492
1493 buf = read_object_file(oid, &type, &size);
1494 if (!buf)
1495 return error("unable to load config blob object '%s'", name);
1496 if (type != OBJ_BLOB) {
1497 free(buf);
1498 return error("reference '%s' does not point to a blob", name);
1499 }
1500
1501 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1502 free(buf);
1503
1504 return ret;
1505 }
1506
1507 static int git_config_from_blob_ref(config_fn_t fn,
1508 const char *name,
1509 void *data)
1510 {
1511 struct object_id oid;
1512
1513 if (get_oid(name, &oid) < 0)
1514 return error("unable to resolve config blob '%s'", name);
1515 return git_config_from_blob_oid(fn, name, &oid, data);
1516 }
1517
1518 const char *git_etc_gitconfig(void)
1519 {
1520 static const char *system_wide;
1521 if (!system_wide)
1522 system_wide = system_path(ETC_GITCONFIG);
1523 return system_wide;
1524 }
1525
1526 /*
1527 * Parse environment variable 'k' as a boolean (in various
1528 * possible spellings); if missing, use the default value 'def'.
1529 */
1530 int git_env_bool(const char *k, int def)
1531 {
1532 const char *v = getenv(k);
1533 return v ? git_config_bool(k, v) : def;
1534 }
1535
1536 /*
1537 * Parse environment variable 'k' as ulong with possibly a unit
1538 * suffix; if missing, use the default value 'val'.
1539 */
1540 unsigned long git_env_ulong(const char *k, unsigned long val)
1541 {
1542 const char *v = getenv(k);
1543 if (v && !git_parse_ulong(v, &val))
1544 die("failed to parse %s", k);
1545 return val;
1546 }
1547
1548 int git_config_system(void)
1549 {
1550 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1551 }
1552
1553 static int do_git_config_sequence(const struct config_options *opts,
1554 config_fn_t fn, void *data)
1555 {
1556 int ret = 0;
1557 char *xdg_config = xdg_config_home("config");
1558 char *user_config = expand_user_path("~/.gitconfig", 0);
1559 char *repo_config;
1560
1561 if (opts->commondir)
1562 repo_config = mkpathdup("%s/config", opts->commondir);
1563 else
1564 repo_config = NULL;
1565
1566 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1567 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1568 ret += git_config_from_file(fn, git_etc_gitconfig(),
1569 data);
1570
1571 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1572 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1573 ret += git_config_from_file(fn, xdg_config, data);
1574
1575 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1576 ret += git_config_from_file(fn, user_config, data);
1577
1578 current_parsing_scope = CONFIG_SCOPE_REPO;
1579 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1580 ret += git_config_from_file(fn, repo_config, data);
1581
1582 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1583 if (git_config_from_parameters(fn, data) < 0)
1584 die(_("unable to parse command-line config"));
1585
1586 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1587 free(xdg_config);
1588 free(user_config);
1589 free(repo_config);
1590 return ret;
1591 }
1592
1593 int config_with_options(config_fn_t fn, void *data,
1594 struct git_config_source *config_source,
1595 const struct config_options *opts)
1596 {
1597 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1598
1599 if (opts->respect_includes) {
1600 inc.fn = fn;
1601 inc.data = data;
1602 inc.opts = opts;
1603 fn = git_config_include;
1604 data = &inc;
1605 }
1606
1607 /*
1608 * If we have a specific filename, use it. Otherwise, follow the
1609 * regular lookup sequence.
1610 */
1611 if (config_source && config_source->use_stdin)
1612 return git_config_from_stdin(fn, data);
1613 else if (config_source && config_source->file)
1614 return git_config_from_file(fn, config_source->file, data);
1615 else if (config_source && config_source->blob)
1616 return git_config_from_blob_ref(fn, config_source->blob, data);
1617
1618 return do_git_config_sequence(opts, fn, data);
1619 }
1620
1621 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1622 {
1623 int i, value_index;
1624 struct string_list *values;
1625 struct config_set_element *entry;
1626 struct configset_list *list = &cs->list;
1627
1628 for (i = 0; i < list->nr; i++) {
1629 entry = list->items[i].e;
1630 value_index = list->items[i].value_index;
1631 values = &entry->value_list;
1632
1633 current_config_kvi = values->items[value_index].util;
1634
1635 if (fn(entry->key, values->items[value_index].string, data) < 0)
1636 git_die_config_linenr(entry->key,
1637 current_config_kvi->filename,
1638 current_config_kvi->linenr);
1639
1640 current_config_kvi = NULL;
1641 }
1642 }
1643
1644 void read_early_config(config_fn_t cb, void *data)
1645 {
1646 struct config_options opts = {0};
1647 struct strbuf commondir = STRBUF_INIT;
1648 struct strbuf gitdir = STRBUF_INIT;
1649
1650 opts.respect_includes = 1;
1651
1652 if (have_git_dir()) {
1653 opts.commondir = get_git_common_dir();
1654 opts.git_dir = get_git_dir();
1655 /*
1656 * When setup_git_directory() was not yet asked to discover the
1657 * GIT_DIR, we ask discover_git_directory() to figure out whether there
1658 * is any repository config we should use (but unlike
1659 * setup_git_directory_gently(), no global state is changed, most
1660 * notably, the current working directory is still the same after the
1661 * call).
1662 */
1663 } else if (!discover_git_directory(&commondir, &gitdir)) {
1664 opts.commondir = commondir.buf;
1665 opts.git_dir = gitdir.buf;
1666 }
1667
1668 config_with_options(cb, data, NULL, &opts);
1669
1670 strbuf_release(&commondir);
1671 strbuf_release(&gitdir);
1672 }
1673
1674 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1675 {
1676 struct config_set_element k;
1677 struct config_set_element *found_entry;
1678 char *normalized_key;
1679 /*
1680 * `key` may come from the user, so normalize it before using it
1681 * for querying entries from the hashmap.
1682 */
1683 if (git_config_parse_key(key, &normalized_key, NULL))
1684 return NULL;
1685
1686 hashmap_entry_init(&k, strhash(normalized_key));
1687 k.key = normalized_key;
1688 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1689 free(normalized_key);
1690 return found_entry;
1691 }
1692
1693 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1694 {
1695 struct config_set_element *e;
1696 struct string_list_item *si;
1697 struct configset_list_item *l_item;
1698 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1699
1700 e = configset_find_element(cs, key);
1701 /*
1702 * Since the keys are being fed by git_config*() callback mechanism, they
1703 * are already normalized. So simply add them without any further munging.
1704 */
1705 if (!e) {
1706 e = xmalloc(sizeof(*e));
1707 hashmap_entry_init(e, strhash(key));
1708 e->key = xstrdup(key);
1709 string_list_init(&e->value_list, 1);
1710 hashmap_add(&cs->config_hash, e);
1711 }
1712 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1713
1714 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1715 l_item = &cs->list.items[cs->list.nr++];
1716 l_item->e = e;
1717 l_item->value_index = e->value_list.nr - 1;
1718
1719 if (!cf)
1720 die("BUG: configset_add_value has no source");
1721 if (cf->name) {
1722 kv_info->filename = strintern(cf->name);
1723 kv_info->linenr = cf->linenr;
1724 kv_info->origin_type = cf->origin_type;
1725 } else {
1726 /* for values read from `git_config_from_parameters()` */
1727 kv_info->filename = NULL;
1728 kv_info->linenr = -1;
1729 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1730 }
1731 kv_info->scope = current_parsing_scope;
1732 si->util = kv_info;
1733
1734 return 0;
1735 }
1736
1737 static int config_set_element_cmp(const void *unused_cmp_data,
1738 const void *entry,
1739 const void *entry_or_key,
1740 const void *unused_keydata)
1741 {
1742 const struct config_set_element *e1 = entry;
1743 const struct config_set_element *e2 = entry_or_key;
1744
1745 return strcmp(e1->key, e2->key);
1746 }
1747
1748 void git_configset_init(struct config_set *cs)
1749 {
1750 hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0);
1751 cs->hash_initialized = 1;
1752 cs->list.nr = 0;
1753 cs->list.alloc = 0;
1754 cs->list.items = NULL;
1755 }
1756
1757 void git_configset_clear(struct config_set *cs)
1758 {
1759 struct config_set_element *entry;
1760 struct hashmap_iter iter;
1761 if (!cs->hash_initialized)
1762 return;
1763
1764 hashmap_iter_init(&cs->config_hash, &iter);
1765 while ((entry = hashmap_iter_next(&iter))) {
1766 free(entry->key);
1767 string_list_clear(&entry->value_list, 1);
1768 }
1769 hashmap_free(&cs->config_hash, 1);
1770 cs->hash_initialized = 0;
1771 free(cs->list.items);
1772 cs->list.nr = 0;
1773 cs->list.alloc = 0;
1774 cs->list.items = NULL;
1775 }
1776
1777 static int config_set_callback(const char *key, const char *value, void *cb)
1778 {
1779 struct config_set *cs = cb;
1780 configset_add_value(cs, key, value);
1781 return 0;
1782 }
1783
1784 int git_configset_add_file(struct config_set *cs, const char *filename)
1785 {
1786 return git_config_from_file(config_set_callback, filename, cs);
1787 }
1788
1789 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1790 {
1791 const struct string_list *values = NULL;
1792 /*
1793 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1794 * queried key in the files of the configset, the value returned will be the last
1795 * value in the value list for that key.
1796 */
1797 values = git_configset_get_value_multi(cs, key);
1798
1799 if (!values)
1800 return 1;
1801 assert(values->nr > 0);
1802 *value = values->items[values->nr - 1].string;
1803 return 0;
1804 }
1805
1806 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1807 {
1808 struct config_set_element *e = configset_find_element(cs, key);
1809 return e ? &e->value_list : NULL;
1810 }
1811
1812 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1813 {
1814 const char *value;
1815 if (!git_configset_get_value(cs, key, &value))
1816 return git_config_string(dest, key, value);
1817 else
1818 return 1;
1819 }
1820
1821 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1822 {
1823 return git_configset_get_string_const(cs, key, (const char **)dest);
1824 }
1825
1826 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1827 {
1828 const char *value;
1829 if (!git_configset_get_value(cs, key, &value)) {
1830 *dest = git_config_int(key, value);
1831 return 0;
1832 } else
1833 return 1;
1834 }
1835
1836 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1837 {
1838 const char *value;
1839 if (!git_configset_get_value(cs, key, &value)) {
1840 *dest = git_config_ulong(key, value);
1841 return 0;
1842 } else
1843 return 1;
1844 }
1845
1846 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1847 {
1848 const char *value;
1849 if (!git_configset_get_value(cs, key, &value)) {
1850 *dest = git_config_bool(key, value);
1851 return 0;
1852 } else
1853 return 1;
1854 }
1855
1856 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1857 int *is_bool, int *dest)
1858 {
1859 const char *value;
1860 if (!git_configset_get_value(cs, key, &value)) {
1861 *dest = git_config_bool_or_int(key, value, is_bool);
1862 return 0;
1863 } else
1864 return 1;
1865 }
1866
1867 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1868 {
1869 const char *value;
1870 if (!git_configset_get_value(cs, key, &value)) {
1871 *dest = git_parse_maybe_bool(value);
1872 if (*dest == -1)
1873 return -1;
1874 return 0;
1875 } else
1876 return 1;
1877 }
1878
1879 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1880 {
1881 const char *value;
1882 if (!git_configset_get_value(cs, key, &value))
1883 return git_config_pathname(dest, key, value);
1884 else
1885 return 1;
1886 }
1887
1888 /* Functions use to read configuration from a repository */
1889 static void repo_read_config(struct repository *repo)
1890 {
1891 struct config_options opts;
1892
1893 opts.respect_includes = 1;
1894 opts.commondir = repo->commondir;
1895 opts.git_dir = repo->gitdir;
1896
1897 if (!repo->config)
1898 repo->config = xcalloc(1, sizeof(struct config_set));
1899 else
1900 git_configset_clear(repo->config);
1901
1902 git_configset_init(repo->config);
1903
1904 if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
1905 /*
1906 * config_with_options() normally returns only
1907 * zero, as most errors are fatal, and
1908 * non-fatal potential errors are guarded by "if"
1909 * statements that are entered only when no error is
1910 * possible.
1911 *
1912 * If we ever encounter a non-fatal error, it means
1913 * something went really wrong and we should stop
1914 * immediately.
1915 */
1916 die(_("unknown error occurred while reading the configuration files"));
1917 }
1918
1919 static void git_config_check_init(struct repository *repo)
1920 {
1921 if (repo->config && repo->config->hash_initialized)
1922 return;
1923 repo_read_config(repo);
1924 }
1925
1926 static void repo_config_clear(struct repository *repo)
1927 {
1928 if (!repo->config || !repo->config->hash_initialized)
1929 return;
1930 git_configset_clear(repo->config);
1931 }
1932
1933 void repo_config(struct repository *repo, config_fn_t fn, void *data)
1934 {
1935 git_config_check_init(repo);
1936 configset_iter(repo->config, fn, data);
1937 }
1938
1939 int repo_config_get_value(struct repository *repo,
1940 const char *key, const char **value)
1941 {
1942 git_config_check_init(repo);
1943 return git_configset_get_value(repo->config, key, value);
1944 }
1945
1946 const struct string_list *repo_config_get_value_multi(struct repository *repo,
1947 const char *key)
1948 {
1949 git_config_check_init(repo);
1950 return git_configset_get_value_multi(repo->config, key);
1951 }
1952
1953 int repo_config_get_string_const(struct repository *repo,
1954 const char *key, const char **dest)
1955 {
1956 int ret;
1957 git_config_check_init(repo);
1958 ret = git_configset_get_string_const(repo->config, key, dest);
1959 if (ret < 0)
1960 git_die_config(key, NULL);
1961 return ret;
1962 }
1963
1964 int repo_config_get_string(struct repository *repo,
1965 const char *key, char **dest)
1966 {
1967 git_config_check_init(repo);
1968 return repo_config_get_string_const(repo, key, (const char **)dest);
1969 }
1970
1971 int repo_config_get_int(struct repository *repo,
1972 const char *key, int *dest)
1973 {
1974 git_config_check_init(repo);
1975 return git_configset_get_int(repo->config, key, dest);
1976 }
1977
1978 int repo_config_get_ulong(struct repository *repo,
1979 const char *key, unsigned long *dest)
1980 {
1981 git_config_check_init(repo);
1982 return git_configset_get_ulong(repo->config, key, dest);
1983 }
1984
1985 int repo_config_get_bool(struct repository *repo,
1986 const char *key, int *dest)
1987 {
1988 git_config_check_init(repo);
1989 return git_configset_get_bool(repo->config, key, dest);
1990 }
1991
1992 int repo_config_get_bool_or_int(struct repository *repo,
1993 const char *key, int *is_bool, int *dest)
1994 {
1995 git_config_check_init(repo);
1996 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
1997 }
1998
1999 int repo_config_get_maybe_bool(struct repository *repo,
2000 const char *key, int *dest)
2001 {
2002 git_config_check_init(repo);
2003 return git_configset_get_maybe_bool(repo->config, key, dest);
2004 }
2005
2006 int repo_config_get_pathname(struct repository *repo,
2007 const char *key, const char **dest)
2008 {
2009 int ret;
2010 git_config_check_init(repo);
2011 ret = git_configset_get_pathname(repo->config, key, dest);
2012 if (ret < 0)
2013 git_die_config(key, NULL);
2014 return ret;
2015 }
2016
2017 /* Functions used historically to read configuration from 'the_repository' */
2018 void git_config(config_fn_t fn, void *data)
2019 {
2020 repo_config(the_repository, fn, data);
2021 }
2022
2023 void git_config_clear(void)
2024 {
2025 repo_config_clear(the_repository);
2026 }
2027
2028 int git_config_get_value(const char *key, const char **value)
2029 {
2030 return repo_config_get_value(the_repository, key, value);
2031 }
2032
2033 const struct string_list *git_config_get_value_multi(const char *key)
2034 {
2035 return repo_config_get_value_multi(the_repository, key);
2036 }
2037
2038 int git_config_get_string_const(const char *key, const char **dest)
2039 {
2040 return repo_config_get_string_const(the_repository, key, dest);
2041 }
2042
2043 int git_config_get_string(const char *key, char **dest)
2044 {
2045 return repo_config_get_string(the_repository, key, dest);
2046 }
2047
2048 int git_config_get_int(const char *key, int *dest)
2049 {
2050 return repo_config_get_int(the_repository, key, dest);
2051 }
2052
2053 int git_config_get_ulong(const char *key, unsigned long *dest)
2054 {
2055 return repo_config_get_ulong(the_repository, key, dest);
2056 }
2057
2058 int git_config_get_bool(const char *key, int *dest)
2059 {
2060 return repo_config_get_bool(the_repository, key, dest);
2061 }
2062
2063 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2064 {
2065 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2066 }
2067
2068 int git_config_get_maybe_bool(const char *key, int *dest)
2069 {
2070 return repo_config_get_maybe_bool(the_repository, key, dest);
2071 }
2072
2073 int git_config_get_pathname(const char *key, const char **dest)
2074 {
2075 return repo_config_get_pathname(the_repository, key, dest);
2076 }
2077
2078 /*
2079 * Note: This function exists solely to maintain backward compatibility with
2080 * 'fetch' and 'update_clone' storing configuration in '.gitmodules' and should
2081 * NOT be used anywhere else.
2082 *
2083 * Runs the provided config function on the '.gitmodules' file found in the
2084 * working directory.
2085 */
2086 void config_from_gitmodules(config_fn_t fn, void *data)
2087 {
2088 if (the_repository->worktree) {
2089 char *file = repo_worktree_path(the_repository, GITMODULES_FILE);
2090 git_config_from_file(fn, file, data);
2091 free(file);
2092 }
2093 }
2094
2095 int git_config_get_expiry(const char *key, const char **output)
2096 {
2097 int ret = git_config_get_string_const(key, output);
2098 if (ret)
2099 return ret;
2100 if (strcmp(*output, "now")) {
2101 timestamp_t now = approxidate("now");
2102 if (approxidate(*output) >= now)
2103 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2104 }
2105 return ret;
2106 }
2107
2108 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2109 {
2110 char *expiry_string;
2111 intmax_t days;
2112 timestamp_t when;
2113
2114 if (git_config_get_string(key, &expiry_string))
2115 return 1; /* no such thing */
2116
2117 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2118 const int scale = 86400;
2119 *expiry = now - days * scale;
2120 return 0;
2121 }
2122
2123 if (!parse_expiry_date(expiry_string, &when)) {
2124 *expiry = when;
2125 return 0;
2126 }
2127 return -1; /* thing exists but cannot be parsed */
2128 }
2129
2130 int git_config_get_untracked_cache(void)
2131 {
2132 int val = -1;
2133 const char *v;
2134
2135 /* Hack for test programs like test-dump-untracked-cache */
2136 if (ignore_untracked_cache_config)
2137 return -1;
2138
2139 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
2140 return val;
2141
2142 if (!git_config_get_value("core.untrackedcache", &v)) {
2143 if (!strcasecmp(v, "keep"))
2144 return -1;
2145
2146 error(_("unknown core.untrackedCache value '%s'; "
2147 "using 'keep' default value"), v);
2148 return -1;
2149 }
2150
2151 return -1; /* default value */
2152 }
2153
2154 int git_config_get_split_index(void)
2155 {
2156 int val;
2157
2158 if (!git_config_get_maybe_bool("core.splitindex", &val))
2159 return val;
2160
2161 return -1; /* default value */
2162 }
2163
2164 int git_config_get_max_percent_split_change(void)
2165 {
2166 int val = -1;
2167
2168 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2169 if (0 <= val && val <= 100)
2170 return val;
2171
2172 return error(_("splitIndex.maxPercentChange value '%d' "
2173 "should be between 0 and 100"), val);
2174 }
2175
2176 return -1; /* default value */
2177 }
2178
2179 int git_config_get_fsmonitor(void)
2180 {
2181 if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
2182 core_fsmonitor = getenv("GIT_FSMONITOR_TEST");
2183
2184 if (core_fsmonitor && !*core_fsmonitor)
2185 core_fsmonitor = NULL;
2186
2187 if (core_fsmonitor)
2188 return 1;
2189
2190 return 0;
2191 }
2192
2193 NORETURN
2194 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2195 {
2196 if (!filename)
2197 die(_("unable to parse '%s' from command-line config"), key);
2198 else
2199 die(_("bad config variable '%s' in file '%s' at line %d"),
2200 key, filename, linenr);
2201 }
2202
2203 NORETURN __attribute__((format(printf, 2, 3)))
2204 void git_die_config(const char *key, const char *err, ...)
2205 {
2206 const struct string_list *values;
2207 struct key_value_info *kv_info;
2208
2209 if (err) {
2210 va_list params;
2211 va_start(params, err);
2212 vreportf("error: ", err, params);
2213 va_end(params);
2214 }
2215 values = git_config_get_value_multi(key);
2216 kv_info = values->items[values->nr - 1].util;
2217 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2218 }
2219
2220 /*
2221 * Find all the stuff for git_config_set() below.
2222 */
2223
2224 static struct {
2225 int baselen;
2226 char *key;
2227 int do_not_match;
2228 regex_t *value_regex;
2229 int multi_replace;
2230 size_t *offset;
2231 unsigned int offset_alloc;
2232 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
2233 unsigned int seen;
2234 } store;
2235
2236 static int matches(const char *key, const char *value)
2237 {
2238 if (strcmp(key, store.key))
2239 return 0; /* not ours */
2240 if (!store.value_regex)
2241 return 1; /* always matches */
2242 if (store.value_regex == CONFIG_REGEX_NONE)
2243 return 0; /* never matches */
2244
2245 return store.do_not_match ^
2246 (value && !regexec(store.value_regex, value, 0, NULL, 0));
2247 }
2248
2249 static int store_aux(const char *key, const char *value, void *cb)
2250 {
2251 const char *ep;
2252 size_t section_len;
2253
2254 switch (store.state) {
2255 case KEY_SEEN:
2256 if (matches(key, value)) {
2257 if (store.seen == 1 && store.multi_replace == 0) {
2258 warning(_("%s has multiple values"), key);
2259 }
2260
2261 ALLOC_GROW(store.offset, store.seen + 1,
2262 store.offset_alloc);
2263
2264 store.offset[store.seen] = cf->do_ftell(cf);
2265 store.seen++;
2266 }
2267 break;
2268 case SECTION_SEEN:
2269 /*
2270 * What we are looking for is in store.key (both
2271 * section and var), and its section part is baselen
2272 * long. We found key (again, both section and var).
2273 * We would want to know if this key is in the same
2274 * section as what we are looking for. We already
2275 * know we are in the same section as what should
2276 * hold store.key.
2277 */
2278 ep = strrchr(key, '.');
2279 section_len = ep - key;
2280
2281 if ((section_len != store.baselen) ||
2282 memcmp(key, store.key, section_len+1)) {
2283 store.state = SECTION_END_SEEN;
2284 break;
2285 }
2286
2287 /*
2288 * Do not increment matches: this is no match, but we
2289 * just made sure we are in the desired section.
2290 */
2291 ALLOC_GROW(store.offset, store.seen + 1,
2292 store.offset_alloc);
2293 store.offset[store.seen] = cf->do_ftell(cf);
2294 /* fallthru */
2295 case SECTION_END_SEEN:
2296 case START:
2297 if (matches(key, value)) {
2298 ALLOC_GROW(store.offset, store.seen + 1,
2299 store.offset_alloc);
2300 store.offset[store.seen] = cf->do_ftell(cf);
2301 store.state = KEY_SEEN;
2302 store.seen++;
2303 } else {
2304 if (strrchr(key, '.') - key == store.baselen &&
2305 !strncmp(key, store.key, store.baselen)) {
2306 store.state = SECTION_SEEN;
2307 ALLOC_GROW(store.offset,
2308 store.seen + 1,
2309 store.offset_alloc);
2310 store.offset[store.seen] = cf->do_ftell(cf);
2311 }
2312 }
2313 }
2314 return 0;
2315 }
2316
2317 static int write_error(const char *filename)
2318 {
2319 error("failed to write new configuration file %s", filename);
2320
2321 /* Same error code as "failed to rename". */
2322 return 4;
2323 }
2324
2325 static struct strbuf store_create_section(const char *key)
2326 {
2327 const char *dot;
2328 int i;
2329 struct strbuf sb = STRBUF_INIT;
2330
2331 dot = memchr(key, '.', store.baselen);
2332 if (dot) {
2333 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2334 for (i = dot - key + 1; i < store.baselen; i++) {
2335 if (key[i] == '"' || key[i] == '\\')
2336 strbuf_addch(&sb, '\\');
2337 strbuf_addch(&sb, key[i]);
2338 }
2339 strbuf_addstr(&sb, "\"]\n");
2340 } else {
2341 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
2342 }
2343
2344 return sb;
2345 }
2346
2347 static ssize_t write_section(int fd, const char *key)
2348 {
2349 struct strbuf sb = store_create_section(key);
2350 ssize_t ret;
2351
2352 ret = write_in_full(fd, sb.buf, sb.len);
2353 strbuf_release(&sb);
2354
2355 return ret;
2356 }
2357
2358 static ssize_t write_pair(int fd, const char *key, const char *value)
2359 {
2360 int i;
2361 ssize_t ret;
2362 int length = strlen(key + store.baselen + 1);
2363 const char *quote = "";
2364 struct strbuf sb = STRBUF_INIT;
2365
2366 /*
2367 * Check to see if the value needs to be surrounded with a dq pair.
2368 * Note that problematic characters are always backslash-quoted; this
2369 * check is about not losing leading or trailing SP and strings that
2370 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2371 * configuration parser.
2372 */
2373 if (value[0] == ' ')
2374 quote = "\"";
2375 for (i = 0; value[i]; i++)
2376 if (value[i] == ';' || value[i] == '#')
2377 quote = "\"";
2378 if (i && value[i - 1] == ' ')
2379 quote = "\"";
2380
2381 strbuf_addf(&sb, "\t%.*s = %s",
2382 length, key + store.baselen + 1, quote);
2383
2384 for (i = 0; value[i]; i++)
2385 switch (value[i]) {
2386 case '\n':
2387 strbuf_addstr(&sb, "\\n");
2388 break;
2389 case '\t':
2390 strbuf_addstr(&sb, "\\t");
2391 break;
2392 case '"':
2393 case '\\':
2394 strbuf_addch(&sb, '\\');
2395 /* fallthrough */
2396 default:
2397 strbuf_addch(&sb, value[i]);
2398 break;
2399 }
2400 strbuf_addf(&sb, "%s\n", quote);
2401
2402 ret = write_in_full(fd, sb.buf, sb.len);
2403 strbuf_release(&sb);
2404
2405 return ret;
2406 }
2407
2408 static ssize_t find_beginning_of_line(const char *contents, size_t size,
2409 size_t offset_, int *found_bracket)
2410 {
2411 size_t equal_offset = size, bracket_offset = size;
2412 ssize_t offset;
2413
2414 contline:
2415 for (offset = offset_-2; offset > 0
2416 && contents[offset] != '\n'; offset--)
2417 switch (contents[offset]) {
2418 case '=': equal_offset = offset; break;
2419 case ']': bracket_offset = offset; break;
2420 }
2421 if (offset > 0 && contents[offset-1] == '\\') {
2422 offset_ = offset;
2423 goto contline;
2424 }
2425 if (bracket_offset < equal_offset) {
2426 *found_bracket = 1;
2427 offset = bracket_offset+1;
2428 } else
2429 offset++;
2430
2431 return offset;
2432 }
2433
2434 int git_config_set_in_file_gently(const char *config_filename,
2435 const char *key, const char *value)
2436 {
2437 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2438 }
2439
2440 void git_config_set_in_file(const char *config_filename,
2441 const char *key, const char *value)
2442 {
2443 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2444 }
2445
2446 int git_config_set_gently(const char *key, const char *value)
2447 {
2448 return git_config_set_multivar_gently(key, value, NULL, 0);
2449 }
2450
2451 void git_config_set(const char *key, const char *value)
2452 {
2453 git_config_set_multivar(key, value, NULL, 0);
2454 }
2455
2456 /*
2457 * If value==NULL, unset in (remove from) config,
2458 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2459 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2460 * (only add a new one)
2461 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2462 * else all matching key/values (regardless how many) are removed,
2463 * before the new pair is written.
2464 *
2465 * Returns 0 on success.
2466 *
2467 * This function does this:
2468 *
2469 * - it locks the config file by creating ".git/config.lock"
2470 *
2471 * - it then parses the config using store_aux() as validator to find
2472 * the position on the key/value pair to replace. If it is to be unset,
2473 * it must be found exactly once.
2474 *
2475 * - the config file is mmap()ed and the part before the match (if any) is
2476 * written to the lock file, then the changed part and the rest.
2477 *
2478 * - the config file is removed and the lock file rename()d to it.
2479 *
2480 */
2481 int git_config_set_multivar_in_file_gently(const char *config_filename,
2482 const char *key, const char *value,
2483 const char *value_regex,
2484 int multi_replace)
2485 {
2486 int fd = -1, in_fd = -1;
2487 int ret;
2488 struct lock_file lock = LOCK_INIT;
2489 char *filename_buf = NULL;
2490 char *contents = NULL;
2491 size_t contents_sz;
2492
2493 /* parse-key returns negative; flip the sign to feed exit(3) */
2494 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2495 if (ret)
2496 goto out_free;
2497
2498 store.multi_replace = multi_replace;
2499
2500 if (!config_filename)
2501 config_filename = filename_buf = git_pathdup("config");
2502
2503 /*
2504 * The lock serves a purpose in addition to locking: the new
2505 * contents of .git/config will be written into it.
2506 */
2507 fd = hold_lock_file_for_update(&lock, config_filename, 0);
2508 if (fd < 0) {
2509 error_errno("could not lock config file %s", config_filename);
2510 free(store.key);
2511 ret = CONFIG_NO_LOCK;
2512 goto out_free;
2513 }
2514
2515 /*
2516 * If .git/config does not exist yet, write a minimal version.
2517 */
2518 in_fd = open(config_filename, O_RDONLY);
2519 if ( in_fd < 0 ) {
2520 free(store.key);
2521
2522 if ( ENOENT != errno ) {
2523 error_errno("opening %s", config_filename);
2524 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2525 goto out_free;
2526 }
2527 /* if nothing to unset, error out */
2528 if (value == NULL) {
2529 ret = CONFIG_NOTHING_SET;
2530 goto out_free;
2531 }
2532
2533 store.key = (char *)key;
2534 if (write_section(fd, key) < 0 ||
2535 write_pair(fd, key, value) < 0)
2536 goto write_err_out;
2537 } else {
2538 struct stat st;
2539 size_t copy_begin, copy_end;
2540 int i, new_line = 0;
2541
2542 if (value_regex == NULL)
2543 store.value_regex = NULL;
2544 else if (value_regex == CONFIG_REGEX_NONE)
2545 store.value_regex = CONFIG_REGEX_NONE;
2546 else {
2547 if (value_regex[0] == '!') {
2548 store.do_not_match = 1;
2549 value_regex++;
2550 } else
2551 store.do_not_match = 0;
2552
2553 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2554 if (regcomp(store.value_regex, value_regex,
2555 REG_EXTENDED)) {
2556 error("invalid pattern: %s", value_regex);
2557 free(store.value_regex);
2558 ret = CONFIG_INVALID_PATTERN;
2559 goto out_free;
2560 }
2561 }
2562
2563 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2564 store.offset[0] = 0;
2565 store.state = START;
2566 store.seen = 0;
2567
2568 /*
2569 * After this, store.offset will contain the *end* offset
2570 * of the last match, or remain at 0 if no match was found.
2571 * As a side effect, we make sure to transform only a valid
2572 * existing config file.
2573 */
2574 if (git_config_from_file(store_aux, config_filename, NULL)) {
2575 error("invalid config file %s", config_filename);
2576 free(store.key);
2577 if (store.value_regex != NULL &&
2578 store.value_regex != CONFIG_REGEX_NONE) {
2579 regfree(store.value_regex);
2580 free(store.value_regex);
2581 }
2582 ret = CONFIG_INVALID_FILE;
2583 goto out_free;
2584 }
2585
2586 free(store.key);
2587 if (store.value_regex != NULL &&
2588 store.value_regex != CONFIG_REGEX_NONE) {
2589 regfree(store.value_regex);
2590 free(store.value_regex);
2591 }
2592
2593 /* if nothing to unset, or too many matches, error out */
2594 if ((store.seen == 0 && value == NULL) ||
2595 (store.seen > 1 && multi_replace == 0)) {
2596 ret = CONFIG_NOTHING_SET;
2597 goto out_free;
2598 }
2599
2600 if (fstat(in_fd, &st) == -1) {
2601 error_errno(_("fstat on %s failed"), config_filename);
2602 ret = CONFIG_INVALID_FILE;
2603 goto out_free;
2604 }
2605
2606 contents_sz = xsize_t(st.st_size);
2607 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2608 MAP_PRIVATE, in_fd, 0);
2609 if (contents == MAP_FAILED) {
2610 if (errno == ENODEV && S_ISDIR(st.st_mode))
2611 errno = EISDIR;
2612 error_errno("unable to mmap '%s'", config_filename);
2613 ret = CONFIG_INVALID_FILE;
2614 contents = NULL;
2615 goto out_free;
2616 }
2617 close(in_fd);
2618 in_fd = -1;
2619
2620 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
2621 error_errno("chmod on %s failed", get_lock_file_path(&lock));
2622 ret = CONFIG_NO_WRITE;
2623 goto out_free;
2624 }
2625
2626 if (store.seen == 0)
2627 store.seen = 1;
2628
2629 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2630 if (store.offset[i] == 0) {
2631 store.offset[i] = copy_end = contents_sz;
2632 } else if (store.state != KEY_SEEN) {
2633 copy_end = store.offset[i];
2634 } else
2635 copy_end = find_beginning_of_line(
2636 contents, contents_sz,
2637 store.offset[i]-2, &new_line);
2638
2639 if (copy_end > 0 && contents[copy_end-1] != '\n')
2640 new_line = 1;
2641
2642 /* write the first part of the config */
2643 if (copy_end > copy_begin) {
2644 if (write_in_full(fd, contents + copy_begin,
2645 copy_end - copy_begin) < 0)
2646 goto write_err_out;
2647 if (new_line &&
2648 write_str_in_full(fd, "\n") < 0)
2649 goto write_err_out;
2650 }
2651 copy_begin = store.offset[i];
2652 }
2653
2654 /* write the pair (value == NULL means unset) */
2655 if (value != NULL) {
2656 if (store.state == START) {
2657 if (write_section(fd, key) < 0)
2658 goto write_err_out;
2659 }
2660 if (write_pair(fd, key, value) < 0)
2661 goto write_err_out;
2662 }
2663
2664 /* write the rest of the config */
2665 if (copy_begin < contents_sz)
2666 if (write_in_full(fd, contents + copy_begin,
2667 contents_sz - copy_begin) < 0)
2668 goto write_err_out;
2669
2670 munmap(contents, contents_sz);
2671 contents = NULL;
2672 }
2673
2674 if (commit_lock_file(&lock) < 0) {
2675 error_errno("could not write config file %s", config_filename);
2676 ret = CONFIG_NO_WRITE;
2677 goto out_free;
2678 }
2679
2680 ret = 0;
2681
2682 /* Invalidate the config cache */
2683 git_config_clear();
2684
2685 out_free:
2686 rollback_lock_file(&lock);
2687 free(filename_buf);
2688 if (contents)
2689 munmap(contents, contents_sz);
2690 if (in_fd >= 0)
2691 close(in_fd);
2692 return ret;
2693
2694 write_err_out:
2695 ret = write_error(get_lock_file_path(&lock));
2696 goto out_free;
2697
2698 }
2699
2700 void git_config_set_multivar_in_file(const char *config_filename,
2701 const char *key, const char *value,
2702 const char *value_regex, int multi_replace)
2703 {
2704 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2705 value_regex, multi_replace))
2706 return;
2707 if (value)
2708 die(_("could not set '%s' to '%s'"), key, value);
2709 else
2710 die(_("could not unset '%s'"), key);
2711 }
2712
2713 int git_config_set_multivar_gently(const char *key, const char *value,
2714 const char *value_regex, int multi_replace)
2715 {
2716 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2717 multi_replace);
2718 }
2719
2720 void git_config_set_multivar(const char *key, const char *value,
2721 const char *value_regex, int multi_replace)
2722 {
2723 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2724 multi_replace);
2725 }
2726
2727 static int section_name_match (const char *buf, const char *name)
2728 {
2729 int i = 0, j = 0, dot = 0;
2730 if (buf[i] != '[')
2731 return 0;
2732 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2733 if (!dot && isspace(buf[i])) {
2734 dot = 1;
2735 if (name[j++] != '.')
2736 break;
2737 for (i++; isspace(buf[i]); i++)
2738 ; /* do nothing */
2739 if (buf[i] != '"')
2740 break;
2741 continue;
2742 }
2743 if (buf[i] == '\\' && dot)
2744 i++;
2745 else if (buf[i] == '"' && dot) {
2746 for (i++; isspace(buf[i]); i++)
2747 ; /* do_nothing */
2748 break;
2749 }
2750 if (buf[i] != name[j++])
2751 break;
2752 }
2753 if (buf[i] == ']' && name[j] == 0) {
2754 /*
2755 * We match, now just find the right length offset by
2756 * gobbling up any whitespace after it, as well
2757 */
2758 i++;
2759 for (; buf[i] && isspace(buf[i]); i++)
2760 ; /* do nothing */
2761 return i;
2762 }
2763 return 0;
2764 }
2765
2766 static int section_name_is_ok(const char *name)
2767 {
2768 /* Empty section names are bogus. */
2769 if (!*name)
2770 return 0;
2771
2772 /*
2773 * Before a dot, we must be alphanumeric or dash. After the first dot,
2774 * anything goes, so we can stop checking.
2775 */
2776 for (; *name && *name != '.'; name++)
2777 if (*name != '-' && !isalnum(*name))
2778 return 0;
2779 return 1;
2780 }
2781
2782 /* if new_name == NULL, the section is removed instead */
2783 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
2784 const char *old_name, const char *new_name, int copy)
2785 {
2786 int ret = 0, remove = 0;
2787 char *filename_buf = NULL;
2788 struct lock_file lock = LOCK_INIT;
2789 int out_fd;
2790 char buf[1024];
2791 FILE *config_file = NULL;
2792 struct stat st;
2793 struct strbuf copystr = STRBUF_INIT;
2794
2795 if (new_name && !section_name_is_ok(new_name)) {
2796 ret = error("invalid section name: %s", new_name);
2797 goto out_no_rollback;
2798 }
2799
2800 if (!config_filename)
2801 config_filename = filename_buf = git_pathdup("config");
2802
2803 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
2804 if (out_fd < 0) {
2805 ret = error("could not lock config file %s", config_filename);
2806 goto out;
2807 }
2808
2809 if (!(config_file = fopen(config_filename, "rb"))) {
2810 ret = warn_on_fopen_errors(config_filename);
2811 if (ret)
2812 goto out;
2813 /* no config file means nothing to rename, no error */
2814 goto commit_and_out;
2815 }
2816
2817 if (fstat(fileno(config_file), &st) == -1) {
2818 ret = error_errno(_("fstat on %s failed"), config_filename);
2819 goto out;
2820 }
2821
2822 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
2823 ret = error_errno("chmod on %s failed",
2824 get_lock_file_path(&lock));
2825 goto out;
2826 }
2827
2828 while (fgets(buf, sizeof(buf), config_file)) {
2829 int i;
2830 int length;
2831 int is_section = 0;
2832 char *output = buf;
2833 for (i = 0; buf[i] && isspace(buf[i]); i++)
2834 ; /* do nothing */
2835 if (buf[i] == '[') {
2836 /* it's a section */
2837 int offset;
2838 is_section = 1;
2839
2840 /*
2841 * When encountering a new section under -c we
2842 * need to flush out any section we're already
2843 * coping and begin anew. There might be
2844 * multiple [branch "$name"] sections.
2845 */
2846 if (copystr.len > 0) {
2847 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
2848 ret = write_error(get_lock_file_path(&lock));
2849 goto out;
2850 }
2851 strbuf_reset(&copystr);
2852 }
2853
2854 offset = section_name_match(&buf[i], old_name);
2855 if (offset > 0) {
2856 ret++;
2857 if (new_name == NULL) {
2858 remove = 1;
2859 continue;
2860 }
2861 store.baselen = strlen(new_name);
2862 if (!copy) {
2863 if (write_section(out_fd, new_name) < 0) {
2864 ret = write_error(get_lock_file_path(&lock));
2865 goto out;
2866 }
2867 /*
2868 * We wrote out the new section, with
2869 * a newline, now skip the old
2870 * section's length
2871 */
2872 output += offset + i;
2873 if (strlen(output) > 0) {
2874 /*
2875 * More content means there's
2876 * a declaration to put on the
2877 * next line; indent with a
2878 * tab
2879 */
2880 output -= 1;
2881 output[0] = '\t';
2882 }
2883 } else {
2884 copystr = store_create_section(new_name);
2885 }
2886 }
2887 remove = 0;
2888 }
2889 if (remove)
2890 continue;
2891 length = strlen(output);
2892
2893 if (!is_section && copystr.len > 0) {
2894 strbuf_add(&copystr, output, length);
2895 }
2896
2897 if (write_in_full(out_fd, output, length) < 0) {
2898 ret = write_error(get_lock_file_path(&lock));
2899 goto out;
2900 }
2901 }
2902
2903 /*
2904 * Copy a trailing section at the end of the config, won't be
2905 * flushed by the usual "flush because we have a new section
2906 * logic in the loop above.
2907 */
2908 if (copystr.len > 0) {
2909 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
2910 ret = write_error(get_lock_file_path(&lock));
2911 goto out;
2912 }
2913 strbuf_reset(&copystr);
2914 }
2915
2916 fclose(config_file);
2917 config_file = NULL;
2918 commit_and_out:
2919 if (commit_lock_file(&lock) < 0)
2920 ret = error_errno("could not write config file %s",
2921 config_filename);
2922 out:
2923 if (config_file)
2924 fclose(config_file);
2925 rollback_lock_file(&lock);
2926 out_no_rollback:
2927 free(filename_buf);
2928 return ret;
2929 }
2930
2931 int git_config_rename_section_in_file(const char *config_filename,
2932 const char *old_name, const char *new_name)
2933 {
2934 return git_config_copy_or_rename_section_in_file(config_filename,
2935 old_name, new_name, 0);
2936 }
2937
2938 int git_config_rename_section(const char *old_name, const char *new_name)
2939 {
2940 return git_config_rename_section_in_file(NULL, old_name, new_name);
2941 }
2942
2943 int git_config_copy_section_in_file(const char *config_filename,
2944 const char *old_name, const char *new_name)
2945 {
2946 return git_config_copy_or_rename_section_in_file(config_filename,
2947 old_name, new_name, 1);
2948 }
2949
2950 int git_config_copy_section(const char *old_name, const char *new_name)
2951 {
2952 return git_config_copy_section_in_file(NULL, old_name, new_name);
2953 }
2954
2955 /*
2956 * Call this to report error for your variable that should not
2957 * get a boolean value (i.e. "[my] var" means "true").
2958 */
2959 #undef config_error_nonbool
2960 int config_error_nonbool(const char *var)
2961 {
2962 return error("missing value for '%s'", var);
2963 }
2964
2965 int parse_config_key(const char *var,
2966 const char *section,
2967 const char **subsection, int *subsection_len,
2968 const char **key)
2969 {
2970 const char *dot;
2971
2972 /* Does it start with "section." ? */
2973 if (!skip_prefix(var, section, &var) || *var != '.')
2974 return -1;
2975
2976 /*
2977 * Find the key; we don't know yet if we have a subsection, but we must
2978 * parse backwards from the end, since the subsection may have dots in
2979 * it, too.
2980 */
2981 dot = strrchr(var, '.');
2982 *key = dot + 1;
2983
2984 /* Did we have a subsection at all? */
2985 if (dot == var) {
2986 if (subsection) {
2987 *subsection = NULL;
2988 *subsection_len = 0;
2989 }
2990 }
2991 else {
2992 if (!subsection)
2993 return -1;
2994 *subsection = var + 1;
2995 *subsection_len = dot - *subsection;
2996 }
2997
2998 return 0;
2999 }
3000
3001 const char *current_config_origin_type(void)
3002 {
3003 int type;
3004 if (current_config_kvi)
3005 type = current_config_kvi->origin_type;
3006 else if(cf)
3007 type = cf->origin_type;
3008 else
3009 die("BUG: current_config_origin_type called outside config callback");
3010
3011 switch (type) {
3012 case CONFIG_ORIGIN_BLOB:
3013 return "blob";
3014 case CONFIG_ORIGIN_FILE:
3015 return "file";
3016 case CONFIG_ORIGIN_STDIN:
3017 return "standard input";
3018 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3019 return "submodule-blob";
3020 case CONFIG_ORIGIN_CMDLINE:
3021 return "command line";
3022 default:
3023 die("BUG: unknown config origin type");
3024 }
3025 }
3026
3027 const char *current_config_name(void)
3028 {
3029 const char *name;
3030 if (current_config_kvi)
3031 name = current_config_kvi->filename;
3032 else if (cf)
3033 name = cf->name;
3034 else
3035 die("BUG: current_config_name called outside config callback");
3036 return name ? name : "";
3037 }
3038
3039 enum config_scope current_config_scope(void)
3040 {
3041 if (current_config_kvi)
3042 return current_config_kvi->scope;
3043 else
3044 return current_parsing_scope;
3045 }