296a6d9cc4110bd7fcef542ac9cc9cfe04d4f4d4
[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 "branch.h"
10 #include "config.h"
11 #include "repository.h"
12 #include "lockfile.h"
13 #include "exec-cmd.h"
14 #include "strbuf.h"
15 #include "quote.h"
16 #include "hashmap.h"
17 #include "string-list.h"
18 #include "object-store.h"
19 #include "utf8.h"
20 #include "dir.h"
21 #include "color.h"
22
23 struct config_source {
24 struct config_source *prev;
25 union {
26 FILE *file;
27 struct config_buf {
28 const char *buf;
29 size_t len;
30 size_t pos;
31 } buf;
32 } u;
33 enum config_origin_type origin_type;
34 const char *name;
35 const char *path;
36 enum config_error_action default_error_action;
37 int linenr;
38 int eof;
39 struct strbuf value;
40 struct strbuf var;
41 unsigned subsection_case_sensitive : 1;
42
43 int (*do_fgetc)(struct config_source *c);
44 int (*do_ungetc)(int c, struct config_source *conf);
45 long (*do_ftell)(struct config_source *c);
46 };
47
48 /*
49 * These variables record the "current" config source, which
50 * can be accessed by parsing callbacks.
51 *
52 * The "cf" variable will be non-NULL only when we are actually parsing a real
53 * config source (file, blob, cmdline, etc).
54 *
55 * The "current_config_kvi" variable will be non-NULL only when we are feeding
56 * cached config from a configset into a callback.
57 *
58 * They should generally never be non-NULL at the same time. If they are both
59 * NULL, then we aren't parsing anything (and depending on the function looking
60 * at the variables, it's either a bug for it to be called in the first place,
61 * or it's a function which can be reused for non-config purposes, and should
62 * fall back to some sane behavior).
63 */
64 static struct config_source *cf;
65 static struct key_value_info *current_config_kvi;
66
67 /*
68 * Similar to the variables above, this gives access to the "scope" of the
69 * current value (repo, global, etc). For cached values, it can be found via
70 * the current_config_kvi as above. During parsing, the current value can be
71 * found in this variable. It's not part of "cf" because it transcends a single
72 * file (i.e., a file included from .git/config is still in "repo" scope).
73 */
74 static enum config_scope current_parsing_scope;
75
76 static int core_compression_seen;
77 static int pack_compression_seen;
78 static int zlib_compression_seen;
79
80 static int config_file_fgetc(struct config_source *conf)
81 {
82 return getc_unlocked(conf->u.file);
83 }
84
85 static int config_file_ungetc(int c, struct config_source *conf)
86 {
87 return ungetc(c, conf->u.file);
88 }
89
90 static long config_file_ftell(struct config_source *conf)
91 {
92 return ftell(conf->u.file);
93 }
94
95
96 static int config_buf_fgetc(struct config_source *conf)
97 {
98 if (conf->u.buf.pos < conf->u.buf.len)
99 return conf->u.buf.buf[conf->u.buf.pos++];
100
101 return EOF;
102 }
103
104 static int config_buf_ungetc(int c, struct config_source *conf)
105 {
106 if (conf->u.buf.pos > 0) {
107 conf->u.buf.pos--;
108 if (conf->u.buf.buf[conf->u.buf.pos] != c)
109 BUG("config_buf can only ungetc the same character");
110 return c;
111 }
112
113 return EOF;
114 }
115
116 static long config_buf_ftell(struct config_source *conf)
117 {
118 return conf->u.buf.pos;
119 }
120
121 #define MAX_INCLUDE_DEPTH 10
122 static const char include_depth_advice[] = N_(
123 "exceeded maximum include depth (%d) while including\n"
124 " %s\n"
125 "from\n"
126 " %s\n"
127 "This might be due to circular includes.");
128 static int handle_path_include(const char *path, struct config_include_data *inc)
129 {
130 int ret = 0;
131 struct strbuf buf = STRBUF_INIT;
132 char *expanded;
133
134 if (!path)
135 return config_error_nonbool("include.path");
136
137 expanded = expand_user_path(path, 0);
138 if (!expanded)
139 return error(_("could not expand include path '%s'"), path);
140 path = expanded;
141
142 /*
143 * Use an absolute path as-is, but interpret relative paths
144 * based on the including config file.
145 */
146 if (!is_absolute_path(path)) {
147 char *slash;
148
149 if (!cf || !cf->path)
150 return error(_("relative config includes must come from files"));
151
152 slash = find_last_dir_sep(cf->path);
153 if (slash)
154 strbuf_add(&buf, cf->path, slash - cf->path + 1);
155 strbuf_addstr(&buf, path);
156 path = buf.buf;
157 }
158
159 if (!access_or_die(path, R_OK, 0)) {
160 if (++inc->depth > MAX_INCLUDE_DEPTH)
161 die(_(include_depth_advice), MAX_INCLUDE_DEPTH, path,
162 !cf ? "<unknown>" :
163 cf->name ? cf->name :
164 "the command line");
165 ret = git_config_from_file(git_config_include, path, inc);
166 inc->depth--;
167 }
168 strbuf_release(&buf);
169 free(expanded);
170 return ret;
171 }
172
173 static int prepare_include_condition_pattern(struct strbuf *pat)
174 {
175 struct strbuf path = STRBUF_INIT;
176 char *expanded;
177 int prefix = 0;
178
179 expanded = expand_user_path(pat->buf, 1);
180 if (expanded) {
181 strbuf_reset(pat);
182 strbuf_addstr(pat, expanded);
183 free(expanded);
184 }
185
186 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
187 const char *slash;
188
189 if (!cf || !cf->path)
190 return error(_("relative config include "
191 "conditionals must come from files"));
192
193 strbuf_realpath(&path, cf->path, 1);
194 slash = find_last_dir_sep(path.buf);
195 if (!slash)
196 BUG("how is this possible?");
197 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
198 prefix = slash - path.buf + 1 /* slash */;
199 } else if (!is_absolute_path(pat->buf))
200 strbuf_insert(pat, 0, "**/", 3);
201
202 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
203 strbuf_addstr(pat, "**");
204
205 strbuf_release(&path);
206 return prefix;
207 }
208
209 static int include_by_gitdir(const struct config_options *opts,
210 const char *cond, size_t cond_len, int icase)
211 {
212 struct strbuf text = STRBUF_INIT;
213 struct strbuf pattern = STRBUF_INIT;
214 int ret = 0, prefix;
215 const char *git_dir;
216 int already_tried_absolute = 0;
217
218 if (opts->git_dir)
219 git_dir = opts->git_dir;
220 else
221 goto done;
222
223 strbuf_realpath(&text, git_dir, 1);
224 strbuf_add(&pattern, cond, cond_len);
225 prefix = prepare_include_condition_pattern(&pattern);
226
227 again:
228 if (prefix < 0)
229 goto done;
230
231 if (prefix > 0) {
232 /*
233 * perform literal matching on the prefix part so that
234 * any wildcard character in it can't create side effects.
235 */
236 if (text.len < prefix)
237 goto done;
238 if (!icase && strncmp(pattern.buf, text.buf, prefix))
239 goto done;
240 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
241 goto done;
242 }
243
244 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
245 WM_PATHNAME | (icase ? WM_CASEFOLD : 0));
246
247 if (!ret && !already_tried_absolute) {
248 /*
249 * We've tried e.g. matching gitdir:~/work, but if
250 * ~/work is a symlink to /mnt/storage/work
251 * strbuf_realpath() will expand it, so the rule won't
252 * match. Let's match against a
253 * strbuf_add_absolute_path() version of the path,
254 * which'll do the right thing
255 */
256 strbuf_reset(&text);
257 strbuf_add_absolute_path(&text, git_dir);
258 already_tried_absolute = 1;
259 goto again;
260 }
261 done:
262 strbuf_release(&pattern);
263 strbuf_release(&text);
264 return ret;
265 }
266
267 static int include_condition_is_true(const struct config_options *opts,
268 const char *cond, size_t cond_len)
269 {
270
271 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
272 return include_by_gitdir(opts, cond, cond_len, 0);
273 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
274 return include_by_gitdir(opts, cond, cond_len, 1);
275
276 /* unknown conditionals are always false */
277 return 0;
278 }
279
280 int git_config_include(const char *var, const char *value, void *data)
281 {
282 struct config_include_data *inc = data;
283 const char *cond, *key;
284 int cond_len;
285 int ret;
286
287 /*
288 * Pass along all values, including "include" directives; this makes it
289 * possible to query information on the includes themselves.
290 */
291 ret = inc->fn(var, value, inc->data);
292 if (ret < 0)
293 return ret;
294
295 if (!strcmp(var, "include.path"))
296 ret = handle_path_include(value, inc);
297
298 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
299 (cond && include_condition_is_true(inc->opts, cond, cond_len)) &&
300 !strcmp(key, "path"))
301 ret = handle_path_include(value, inc);
302
303 return ret;
304 }
305
306 void git_config_push_parameter(const char *text)
307 {
308 struct strbuf env = STRBUF_INIT;
309 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
310 if (old && *old) {
311 strbuf_addstr(&env, old);
312 strbuf_addch(&env, ' ');
313 }
314 sq_quote_buf(&env, text);
315 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
316 strbuf_release(&env);
317 }
318
319 static inline int iskeychar(int c)
320 {
321 return isalnum(c) || c == '-';
322 }
323
324 /*
325 * Auxiliary function to sanity-check and split the key into the section
326 * identifier and variable name.
327 *
328 * Returns 0 on success, -1 when there is an invalid character in the key and
329 * -2 if there is no section name in the key.
330 *
331 * store_key - pointer to char* which will hold a copy of the key with
332 * lowercase section and variable name
333 * baselen - pointer to int which will hold the length of the
334 * section + subsection part, can be NULL
335 */
336 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
337 {
338 int i, dot, baselen;
339 const char *last_dot = strrchr(key, '.');
340
341 /*
342 * Since "key" actually contains the section name and the real
343 * key name separated by a dot, we have to know where the dot is.
344 */
345
346 if (last_dot == NULL || last_dot == key) {
347 if (!quiet)
348 error(_("key does not contain a section: %s"), key);
349 return -CONFIG_NO_SECTION_OR_NAME;
350 }
351
352 if (!last_dot[1]) {
353 if (!quiet)
354 error(_("key does not contain variable name: %s"), key);
355 return -CONFIG_NO_SECTION_OR_NAME;
356 }
357
358 baselen = last_dot - key;
359 if (baselen_)
360 *baselen_ = baselen;
361
362 /*
363 * Validate the key and while at it, lower case it for matching.
364 */
365 if (store_key)
366 *store_key = xmallocz(strlen(key));
367
368 dot = 0;
369 for (i = 0; key[i]; i++) {
370 unsigned char c = key[i];
371 if (c == '.')
372 dot = 1;
373 /* Leave the extended basename untouched.. */
374 if (!dot || i > baselen) {
375 if (!iskeychar(c) ||
376 (i == baselen + 1 && !isalpha(c))) {
377 if (!quiet)
378 error(_("invalid key: %s"), key);
379 goto out_free_ret_1;
380 }
381 c = tolower(c);
382 } else if (c == '\n') {
383 if (!quiet)
384 error(_("invalid key (newline): %s"), key);
385 goto out_free_ret_1;
386 }
387 if (store_key)
388 (*store_key)[i] = c;
389 }
390
391 return 0;
392
393 out_free_ret_1:
394 if (store_key) {
395 FREE_AND_NULL(*store_key);
396 }
397 return -CONFIG_INVALID_KEY;
398 }
399
400 int git_config_parse_key(const char *key, char **store_key, int *baselen)
401 {
402 return git_config_parse_key_1(key, store_key, baselen, 0);
403 }
404
405 int git_config_key_is_valid(const char *key)
406 {
407 return !git_config_parse_key_1(key, NULL, NULL, 1);
408 }
409
410 int git_config_parse_parameter(const char *text,
411 config_fn_t fn, void *data)
412 {
413 const char *value;
414 char *canonical_name;
415 struct strbuf **pair;
416 int ret;
417
418 pair = strbuf_split_str(text, '=', 2);
419 if (!pair[0])
420 return error(_("bogus config parameter: %s"), text);
421
422 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
423 strbuf_setlen(pair[0], pair[0]->len - 1);
424 value = pair[1] ? pair[1]->buf : "";
425 } else {
426 value = NULL;
427 }
428
429 strbuf_trim(pair[0]);
430 if (!pair[0]->len) {
431 strbuf_list_free(pair);
432 return error(_("bogus config parameter: %s"), text);
433 }
434
435 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
436 ret = -1;
437 } else {
438 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
439 free(canonical_name);
440 }
441 strbuf_list_free(pair);
442 return ret;
443 }
444
445 int git_config_from_parameters(config_fn_t fn, void *data)
446 {
447 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
448 int ret = 0;
449 char *envw;
450 const char **argv = NULL;
451 int nr = 0, alloc = 0;
452 int i;
453 struct config_source source;
454
455 if (!env)
456 return 0;
457
458 memset(&source, 0, sizeof(source));
459 source.prev = cf;
460 source.origin_type = CONFIG_ORIGIN_CMDLINE;
461 cf = &source;
462
463 /* sq_dequote will write over it */
464 envw = xstrdup(env);
465
466 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
467 ret = error(_("bogus format in %s"), CONFIG_DATA_ENVIRONMENT);
468 goto out;
469 }
470
471 for (i = 0; i < nr; i++) {
472 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
473 ret = -1;
474 goto out;
475 }
476 }
477
478 out:
479 free(argv);
480 free(envw);
481 cf = source.prev;
482 return ret;
483 }
484
485 static int get_next_char(void)
486 {
487 int c = cf->do_fgetc(cf);
488
489 if (c == '\r') {
490 /* DOS like systems */
491 c = cf->do_fgetc(cf);
492 if (c != '\n') {
493 if (c != EOF)
494 cf->do_ungetc(c, cf);
495 c = '\r';
496 }
497 }
498 if (c == '\n')
499 cf->linenr++;
500 if (c == EOF) {
501 cf->eof = 1;
502 cf->linenr++;
503 c = '\n';
504 }
505 return c;
506 }
507
508 static char *parse_value(void)
509 {
510 int quote = 0, comment = 0, space = 0;
511
512 strbuf_reset(&cf->value);
513 for (;;) {
514 int c = get_next_char();
515 if (c == '\n') {
516 if (quote) {
517 cf->linenr--;
518 return NULL;
519 }
520 return cf->value.buf;
521 }
522 if (comment)
523 continue;
524 if (isspace(c) && !quote) {
525 if (cf->value.len)
526 space++;
527 continue;
528 }
529 if (!quote) {
530 if (c == ';' || c == '#') {
531 comment = 1;
532 continue;
533 }
534 }
535 for (; space; space--)
536 strbuf_addch(&cf->value, ' ');
537 if (c == '\\') {
538 c = get_next_char();
539 switch (c) {
540 case '\n':
541 continue;
542 case 't':
543 c = '\t';
544 break;
545 case 'b':
546 c = '\b';
547 break;
548 case 'n':
549 c = '\n';
550 break;
551 /* Some characters escape as themselves */
552 case '\\': case '"':
553 break;
554 /* Reject unknown escape sequences */
555 default:
556 return NULL;
557 }
558 strbuf_addch(&cf->value, c);
559 continue;
560 }
561 if (c == '"') {
562 quote = 1-quote;
563 continue;
564 }
565 strbuf_addch(&cf->value, c);
566 }
567 }
568
569 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
570 {
571 int c;
572 char *value;
573 int ret;
574
575 /* Get the full name */
576 for (;;) {
577 c = get_next_char();
578 if (cf->eof)
579 break;
580 if (!iskeychar(c))
581 break;
582 strbuf_addch(name, tolower(c));
583 }
584
585 while (c == ' ' || c == '\t')
586 c = get_next_char();
587
588 value = NULL;
589 if (c != '\n') {
590 if (c != '=')
591 return -1;
592 value = parse_value();
593 if (!value)
594 return -1;
595 }
596 /*
597 * We already consumed the \n, but we need linenr to point to
598 * the line we just parsed during the call to fn to get
599 * accurate line number in error messages.
600 */
601 cf->linenr--;
602 ret = fn(name->buf, value, data);
603 if (ret >= 0)
604 cf->linenr++;
605 return ret;
606 }
607
608 static int get_extended_base_var(struct strbuf *name, int c)
609 {
610 cf->subsection_case_sensitive = 0;
611 do {
612 if (c == '\n')
613 goto error_incomplete_line;
614 c = get_next_char();
615 } while (isspace(c));
616
617 /* We require the format to be '[base "extension"]' */
618 if (c != '"')
619 return -1;
620 strbuf_addch(name, '.');
621
622 for (;;) {
623 int c = get_next_char();
624 if (c == '\n')
625 goto error_incomplete_line;
626 if (c == '"')
627 break;
628 if (c == '\\') {
629 c = get_next_char();
630 if (c == '\n')
631 goto error_incomplete_line;
632 }
633 strbuf_addch(name, c);
634 }
635
636 /* Final ']' */
637 if (get_next_char() != ']')
638 return -1;
639 return 0;
640 error_incomplete_line:
641 cf->linenr--;
642 return -1;
643 }
644
645 static int get_base_var(struct strbuf *name)
646 {
647 cf->subsection_case_sensitive = 1;
648 for (;;) {
649 int c = get_next_char();
650 if (cf->eof)
651 return -1;
652 if (c == ']')
653 return 0;
654 if (isspace(c))
655 return get_extended_base_var(name, c);
656 if (!iskeychar(c) && c != '.')
657 return -1;
658 strbuf_addch(name, tolower(c));
659 }
660 }
661
662 struct parse_event_data {
663 enum config_event_t previous_type;
664 size_t previous_offset;
665 const struct config_options *opts;
666 };
667
668 static int do_event(enum config_event_t type, struct parse_event_data *data)
669 {
670 size_t offset;
671
672 if (!data->opts || !data->opts->event_fn)
673 return 0;
674
675 if (type == CONFIG_EVENT_WHITESPACE &&
676 data->previous_type == type)
677 return 0;
678
679 offset = cf->do_ftell(cf);
680 /*
681 * At EOF, the parser always "inserts" an extra '\n', therefore
682 * the end offset of the event is the current file position, otherwise
683 * we will already have advanced to the next event.
684 */
685 if (type != CONFIG_EVENT_EOF)
686 offset--;
687
688 if (data->previous_type != CONFIG_EVENT_EOF &&
689 data->opts->event_fn(data->previous_type, data->previous_offset,
690 offset, data->opts->event_fn_data) < 0)
691 return -1;
692
693 data->previous_type = type;
694 data->previous_offset = offset;
695
696 return 0;
697 }
698
699 static int git_parse_source(config_fn_t fn, void *data,
700 const struct config_options *opts)
701 {
702 int comment = 0;
703 int baselen = 0;
704 struct strbuf *var = &cf->var;
705 int error_return = 0;
706 char *error_msg = NULL;
707
708 /* U+FEFF Byte Order Mark in UTF8 */
709 const char *bomptr = utf8_bom;
710
711 /* For the parser event callback */
712 struct parse_event_data event_data = {
713 CONFIG_EVENT_EOF, 0, opts
714 };
715
716 for (;;) {
717 int c;
718
719 c = get_next_char();
720 if (bomptr && *bomptr) {
721 /* We are at the file beginning; skip UTF8-encoded BOM
722 * if present. Sane editors won't put this in on their
723 * own, but e.g. Windows Notepad will do it happily. */
724 if (c == (*bomptr & 0377)) {
725 bomptr++;
726 continue;
727 } else {
728 /* Do not tolerate partial BOM. */
729 if (bomptr != utf8_bom)
730 break;
731 /* No BOM at file beginning. Cool. */
732 bomptr = NULL;
733 }
734 }
735 if (c == '\n') {
736 if (cf->eof) {
737 if (do_event(CONFIG_EVENT_EOF, &event_data) < 0)
738 return -1;
739 return 0;
740 }
741 if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
742 return -1;
743 comment = 0;
744 continue;
745 }
746 if (comment)
747 continue;
748 if (isspace(c)) {
749 if (do_event(CONFIG_EVENT_WHITESPACE, &event_data) < 0)
750 return -1;
751 continue;
752 }
753 if (c == '#' || c == ';') {
754 if (do_event(CONFIG_EVENT_COMMENT, &event_data) < 0)
755 return -1;
756 comment = 1;
757 continue;
758 }
759 if (c == '[') {
760 if (do_event(CONFIG_EVENT_SECTION, &event_data) < 0)
761 return -1;
762
763 /* Reset prior to determining a new stem */
764 strbuf_reset(var);
765 if (get_base_var(var) < 0 || var->len < 1)
766 break;
767 strbuf_addch(var, '.');
768 baselen = var->len;
769 continue;
770 }
771 if (!isalpha(c))
772 break;
773
774 if (do_event(CONFIG_EVENT_ENTRY, &event_data) < 0)
775 return -1;
776
777 /*
778 * Truncate the var name back to the section header
779 * stem prior to grabbing the suffix part of the name
780 * and the value.
781 */
782 strbuf_setlen(var, baselen);
783 strbuf_addch(var, tolower(c));
784 if (get_value(fn, data, var) < 0)
785 break;
786 }
787
788 if (do_event(CONFIG_EVENT_ERROR, &event_data) < 0)
789 return -1;
790
791 switch (cf->origin_type) {
792 case CONFIG_ORIGIN_BLOB:
793 error_msg = xstrfmt(_("bad config line %d in blob %s"),
794 cf->linenr, cf->name);
795 break;
796 case CONFIG_ORIGIN_FILE:
797 error_msg = xstrfmt(_("bad config line %d in file %s"),
798 cf->linenr, cf->name);
799 break;
800 case CONFIG_ORIGIN_STDIN:
801 error_msg = xstrfmt(_("bad config line %d in standard input"),
802 cf->linenr);
803 break;
804 case CONFIG_ORIGIN_SUBMODULE_BLOB:
805 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
806 cf->linenr, cf->name);
807 break;
808 case CONFIG_ORIGIN_CMDLINE:
809 error_msg = xstrfmt(_("bad config line %d in command line %s"),
810 cf->linenr, cf->name);
811 break;
812 default:
813 error_msg = xstrfmt(_("bad config line %d in %s"),
814 cf->linenr, cf->name);
815 }
816
817 switch (opts && opts->error_action ?
818 opts->error_action :
819 cf->default_error_action) {
820 case CONFIG_ERROR_DIE:
821 die("%s", error_msg);
822 break;
823 case CONFIG_ERROR_ERROR:
824 error_return = error("%s", error_msg);
825 break;
826 case CONFIG_ERROR_SILENT:
827 error_return = -1;
828 break;
829 case CONFIG_ERROR_UNSET:
830 BUG("config error action unset");
831 }
832
833 free(error_msg);
834 return error_return;
835 }
836
837 static int parse_unit_factor(const char *end, uintmax_t *val)
838 {
839 if (!*end)
840 return 1;
841 else if (!strcasecmp(end, "k")) {
842 *val *= 1024;
843 return 1;
844 }
845 else if (!strcasecmp(end, "m")) {
846 *val *= 1024 * 1024;
847 return 1;
848 }
849 else if (!strcasecmp(end, "g")) {
850 *val *= 1024 * 1024 * 1024;
851 return 1;
852 }
853 return 0;
854 }
855
856 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
857 {
858 if (value && *value) {
859 char *end;
860 intmax_t val;
861 uintmax_t uval;
862 uintmax_t factor = 1;
863
864 errno = 0;
865 val = strtoimax(value, &end, 0);
866 if (errno == ERANGE)
867 return 0;
868 if (!parse_unit_factor(end, &factor)) {
869 errno = EINVAL;
870 return 0;
871 }
872 uval = labs(val);
873 uval *= factor;
874 if (uval > max || labs(val) > uval) {
875 errno = ERANGE;
876 return 0;
877 }
878 val *= factor;
879 *ret = val;
880 return 1;
881 }
882 errno = EINVAL;
883 return 0;
884 }
885
886 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
887 {
888 if (value && *value) {
889 char *end;
890 uintmax_t val;
891 uintmax_t oldval;
892
893 errno = 0;
894 val = strtoumax(value, &end, 0);
895 if (errno == ERANGE)
896 return 0;
897 oldval = val;
898 if (!parse_unit_factor(end, &val)) {
899 errno = EINVAL;
900 return 0;
901 }
902 if (val > max || oldval > val) {
903 errno = ERANGE;
904 return 0;
905 }
906 *ret = val;
907 return 1;
908 }
909 errno = EINVAL;
910 return 0;
911 }
912
913 static int git_parse_int(const char *value, int *ret)
914 {
915 intmax_t tmp;
916 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
917 return 0;
918 *ret = tmp;
919 return 1;
920 }
921
922 static int git_parse_int64(const char *value, int64_t *ret)
923 {
924 intmax_t tmp;
925 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
926 return 0;
927 *ret = tmp;
928 return 1;
929 }
930
931 int git_parse_ulong(const char *value, unsigned long *ret)
932 {
933 uintmax_t tmp;
934 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
935 return 0;
936 *ret = tmp;
937 return 1;
938 }
939
940 int git_parse_ssize_t(const char *value, ssize_t *ret)
941 {
942 intmax_t tmp;
943 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
944 return 0;
945 *ret = tmp;
946 return 1;
947 }
948
949 NORETURN
950 static void die_bad_number(const char *name, const char *value)
951 {
952 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
953
954 if (!value)
955 value = "";
956
957 if (!(cf && cf->name))
958 die(_("bad numeric config value '%s' for '%s': %s"),
959 value, name, error_type);
960
961 switch (cf->origin_type) {
962 case CONFIG_ORIGIN_BLOB:
963 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
964 value, name, cf->name, error_type);
965 case CONFIG_ORIGIN_FILE:
966 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
967 value, name, cf->name, error_type);
968 case CONFIG_ORIGIN_STDIN:
969 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
970 value, name, error_type);
971 case CONFIG_ORIGIN_SUBMODULE_BLOB:
972 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
973 value, name, cf->name, error_type);
974 case CONFIG_ORIGIN_CMDLINE:
975 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
976 value, name, cf->name, error_type);
977 default:
978 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
979 value, name, cf->name, error_type);
980 }
981 }
982
983 int git_config_int(const char *name, const char *value)
984 {
985 int ret;
986 if (!git_parse_int(value, &ret))
987 die_bad_number(name, value);
988 return ret;
989 }
990
991 int64_t git_config_int64(const char *name, const char *value)
992 {
993 int64_t ret;
994 if (!git_parse_int64(value, &ret))
995 die_bad_number(name, value);
996 return ret;
997 }
998
999 unsigned long git_config_ulong(const char *name, const char *value)
1000 {
1001 unsigned long ret;
1002 if (!git_parse_ulong(value, &ret))
1003 die_bad_number(name, value);
1004 return ret;
1005 }
1006
1007 ssize_t git_config_ssize_t(const char *name, const char *value)
1008 {
1009 ssize_t ret;
1010 if (!git_parse_ssize_t(value, &ret))
1011 die_bad_number(name, value);
1012 return ret;
1013 }
1014
1015 static int git_parse_maybe_bool_text(const char *value)
1016 {
1017 if (!value)
1018 return 1;
1019 if (!*value)
1020 return 0;
1021 if (!strcasecmp(value, "true")
1022 || !strcasecmp(value, "yes")
1023 || !strcasecmp(value, "on"))
1024 return 1;
1025 if (!strcasecmp(value, "false")
1026 || !strcasecmp(value, "no")
1027 || !strcasecmp(value, "off"))
1028 return 0;
1029 return -1;
1030 }
1031
1032 int git_parse_maybe_bool(const char *value)
1033 {
1034 int v = git_parse_maybe_bool_text(value);
1035 if (0 <= v)
1036 return v;
1037 if (git_parse_int(value, &v))
1038 return !!v;
1039 return -1;
1040 }
1041
1042 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
1043 {
1044 int v = git_parse_maybe_bool_text(value);
1045 if (0 <= v) {
1046 *is_bool = 1;
1047 return v;
1048 }
1049 *is_bool = 0;
1050 return git_config_int(name, value);
1051 }
1052
1053 int git_config_bool(const char *name, const char *value)
1054 {
1055 int discard;
1056 return !!git_config_bool_or_int(name, value, &discard);
1057 }
1058
1059 int git_config_string(const char **dest, const char *var, const char *value)
1060 {
1061 if (!value)
1062 return config_error_nonbool(var);
1063 *dest = xstrdup(value);
1064 return 0;
1065 }
1066
1067 int git_config_pathname(const char **dest, const char *var, const char *value)
1068 {
1069 if (!value)
1070 return config_error_nonbool(var);
1071 *dest = expand_user_path(value, 0);
1072 if (!*dest)
1073 die(_("failed to expand user dir in: '%s'"), value);
1074 return 0;
1075 }
1076
1077 int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
1078 {
1079 if (!value)
1080 return config_error_nonbool(var);
1081 if (parse_expiry_date(value, timestamp))
1082 return error(_("'%s' for '%s' is not a valid timestamp"),
1083 value, var);
1084 return 0;
1085 }
1086
1087 int git_config_color(char *dest, const char *var, const char *value)
1088 {
1089 if (!value)
1090 return config_error_nonbool(var);
1091 if (color_parse(value, dest) < 0)
1092 return -1;
1093 return 0;
1094 }
1095
1096 static int git_default_core_config(const char *var, const char *value, void *cb)
1097 {
1098 /* This needs a better name */
1099 if (!strcmp(var, "core.filemode")) {
1100 trust_executable_bit = git_config_bool(var, value);
1101 return 0;
1102 }
1103 if (!strcmp(var, "core.trustctime")) {
1104 trust_ctime = git_config_bool(var, value);
1105 return 0;
1106 }
1107 if (!strcmp(var, "core.checkstat")) {
1108 if (!strcasecmp(value, "default"))
1109 check_stat = 1;
1110 else if (!strcasecmp(value, "minimal"))
1111 check_stat = 0;
1112 }
1113
1114 if (!strcmp(var, "core.quotepath")) {
1115 quote_path_fully = git_config_bool(var, value);
1116 return 0;
1117 }
1118
1119 if (!strcmp(var, "core.symlinks")) {
1120 has_symlinks = git_config_bool(var, value);
1121 return 0;
1122 }
1123
1124 if (!strcmp(var, "core.ignorecase")) {
1125 ignore_case = git_config_bool(var, value);
1126 return 0;
1127 }
1128
1129 if (!strcmp(var, "core.attributesfile"))
1130 return git_config_pathname(&git_attributes_file, var, value);
1131
1132 if (!strcmp(var, "core.hookspath"))
1133 return git_config_pathname(&git_hooks_path, var, value);
1134
1135 if (!strcmp(var, "core.bare")) {
1136 is_bare_repository_cfg = git_config_bool(var, value);
1137 return 0;
1138 }
1139
1140 if (!strcmp(var, "core.ignorestat")) {
1141 assume_unchanged = git_config_bool(var, value);
1142 return 0;
1143 }
1144
1145 if (!strcmp(var, "core.prefersymlinkrefs")) {
1146 prefer_symlink_refs = git_config_bool(var, value);
1147 return 0;
1148 }
1149
1150 if (!strcmp(var, "core.logallrefupdates")) {
1151 if (value && !strcasecmp(value, "always"))
1152 log_all_ref_updates = LOG_REFS_ALWAYS;
1153 else if (git_config_bool(var, value))
1154 log_all_ref_updates = LOG_REFS_NORMAL;
1155 else
1156 log_all_ref_updates = LOG_REFS_NONE;
1157 return 0;
1158 }
1159
1160 if (!strcmp(var, "core.warnambiguousrefs")) {
1161 warn_ambiguous_refs = git_config_bool(var, value);
1162 return 0;
1163 }
1164
1165 if (!strcmp(var, "core.abbrev")) {
1166 if (!value)
1167 return config_error_nonbool(var);
1168 if (!strcasecmp(value, "auto"))
1169 default_abbrev = -1;
1170 else {
1171 int abbrev = git_config_int(var, value);
1172 if (abbrev < minimum_abbrev || abbrev > 40)
1173 return error(_("abbrev length out of range: %d"), abbrev);
1174 default_abbrev = abbrev;
1175 }
1176 return 0;
1177 }
1178
1179 if (!strcmp(var, "core.disambiguate"))
1180 return set_disambiguate_hint_config(var, value);
1181
1182 if (!strcmp(var, "core.loosecompression")) {
1183 int level = git_config_int(var, value);
1184 if (level == -1)
1185 level = Z_DEFAULT_COMPRESSION;
1186 else if (level < 0 || level > Z_BEST_COMPRESSION)
1187 die(_("bad zlib compression level %d"), level);
1188 zlib_compression_level = level;
1189 zlib_compression_seen = 1;
1190 return 0;
1191 }
1192
1193 if (!strcmp(var, "core.compression")) {
1194 int level = git_config_int(var, value);
1195 if (level == -1)
1196 level = Z_DEFAULT_COMPRESSION;
1197 else if (level < 0 || level > Z_BEST_COMPRESSION)
1198 die(_("bad zlib compression level %d"), level);
1199 core_compression_level = level;
1200 core_compression_seen = 1;
1201 if (!zlib_compression_seen)
1202 zlib_compression_level = level;
1203 if (!pack_compression_seen)
1204 pack_compression_level = level;
1205 return 0;
1206 }
1207
1208 if (!strcmp(var, "core.packedgitwindowsize")) {
1209 int pgsz_x2 = getpagesize() * 2;
1210 packed_git_window_size = git_config_ulong(var, value);
1211
1212 /* This value must be multiple of (pagesize * 2) */
1213 packed_git_window_size /= pgsz_x2;
1214 if (packed_git_window_size < 1)
1215 packed_git_window_size = 1;
1216 packed_git_window_size *= pgsz_x2;
1217 return 0;
1218 }
1219
1220 if (!strcmp(var, "core.bigfilethreshold")) {
1221 big_file_threshold = git_config_ulong(var, value);
1222 return 0;
1223 }
1224
1225 if (!strcmp(var, "core.packedgitlimit")) {
1226 packed_git_limit = git_config_ulong(var, value);
1227 return 0;
1228 }
1229
1230 if (!strcmp(var, "core.deltabasecachelimit")) {
1231 delta_base_cache_limit = git_config_ulong(var, value);
1232 return 0;
1233 }
1234
1235 if (!strcmp(var, "core.autocrlf")) {
1236 if (value && !strcasecmp(value, "input")) {
1237 auto_crlf = AUTO_CRLF_INPUT;
1238 return 0;
1239 }
1240 auto_crlf = git_config_bool(var, value);
1241 return 0;
1242 }
1243
1244 if (!strcmp(var, "core.safecrlf")) {
1245 int eol_rndtrp_die;
1246 if (value && !strcasecmp(value, "warn")) {
1247 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1248 return 0;
1249 }
1250 eol_rndtrp_die = git_config_bool(var, value);
1251 global_conv_flags_eol = eol_rndtrp_die ?
1252 CONV_EOL_RNDTRP_DIE : 0;
1253 return 0;
1254 }
1255
1256 if (!strcmp(var, "core.eol")) {
1257 if (value && !strcasecmp(value, "lf"))
1258 core_eol = EOL_LF;
1259 else if (value && !strcasecmp(value, "crlf"))
1260 core_eol = EOL_CRLF;
1261 else if (value && !strcasecmp(value, "native"))
1262 core_eol = EOL_NATIVE;
1263 else
1264 core_eol = EOL_UNSET;
1265 return 0;
1266 }
1267
1268 if (!strcmp(var, "core.checkroundtripencoding")) {
1269 check_roundtrip_encoding = xstrdup(value);
1270 return 0;
1271 }
1272
1273 if (!strcmp(var, "core.notesref")) {
1274 notes_ref_name = xstrdup(value);
1275 return 0;
1276 }
1277
1278 if (!strcmp(var, "core.editor"))
1279 return git_config_string(&editor_program, var, value);
1280
1281 if (!strcmp(var, "core.commentchar")) {
1282 if (!value)
1283 return config_error_nonbool(var);
1284 else if (!strcasecmp(value, "auto"))
1285 auto_comment_line_char = 1;
1286 else if (value[0] && !value[1]) {
1287 comment_line_char = value[0];
1288 auto_comment_line_char = 0;
1289 } else
1290 return error(_("core.commentChar should only be one character"));
1291 return 0;
1292 }
1293
1294 if (!strcmp(var, "core.askpass"))
1295 return git_config_string(&askpass_program, var, value);
1296
1297 if (!strcmp(var, "core.excludesfile"))
1298 return git_config_pathname(&excludes_file, var, value);
1299
1300 if (!strcmp(var, "core.whitespace")) {
1301 if (!value)
1302 return config_error_nonbool(var);
1303 whitespace_rule_cfg = parse_whitespace_rule(value);
1304 return 0;
1305 }
1306
1307 if (!strcmp(var, "core.fsyncobjectfiles")) {
1308 fsync_object_files = git_config_bool(var, value);
1309 return 0;
1310 }
1311
1312 if (!strcmp(var, "core.preloadindex")) {
1313 core_preload_index = git_config_bool(var, value);
1314 return 0;
1315 }
1316
1317 if (!strcmp(var, "core.createobject")) {
1318 if (!strcmp(value, "rename"))
1319 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1320 else if (!strcmp(value, "link"))
1321 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1322 else
1323 die(_("invalid mode for object creation: %s"), value);
1324 return 0;
1325 }
1326
1327 if (!strcmp(var, "core.sparsecheckout")) {
1328 core_apply_sparse_checkout = git_config_bool(var, value);
1329 return 0;
1330 }
1331
1332 if (!strcmp(var, "core.precomposeunicode")) {
1333 precomposed_unicode = git_config_bool(var, value);
1334 return 0;
1335 }
1336
1337 if (!strcmp(var, "core.protecthfs")) {
1338 protect_hfs = git_config_bool(var, value);
1339 return 0;
1340 }
1341
1342 if (!strcmp(var, "core.protectntfs")) {
1343 protect_ntfs = git_config_bool(var, value);
1344 return 0;
1345 }
1346
1347 if (!strcmp(var, "core.partialclonefilter")) {
1348 return git_config_string(&core_partial_clone_filter_default,
1349 var, value);
1350 }
1351
1352 if (!strcmp(var, "core.usereplacerefs")) {
1353 read_replace_refs = git_config_bool(var, value);
1354 return 0;
1355 }
1356
1357 /* Add other config variables here and to Documentation/config.txt. */
1358 return platform_core_config(var, value, cb);
1359 }
1360
1361 static int git_default_i18n_config(const char *var, const char *value)
1362 {
1363 if (!strcmp(var, "i18n.commitencoding"))
1364 return git_config_string(&git_commit_encoding, var, value);
1365
1366 if (!strcmp(var, "i18n.logoutputencoding"))
1367 return git_config_string(&git_log_output_encoding, var, value);
1368
1369 /* Add other config variables here and to Documentation/config.txt. */
1370 return 0;
1371 }
1372
1373 static int git_default_branch_config(const char *var, const char *value)
1374 {
1375 if (!strcmp(var, "branch.autosetupmerge")) {
1376 if (value && !strcasecmp(value, "always")) {
1377 git_branch_track = BRANCH_TRACK_ALWAYS;
1378 return 0;
1379 }
1380 git_branch_track = git_config_bool(var, value);
1381 return 0;
1382 }
1383 if (!strcmp(var, "branch.autosetuprebase")) {
1384 if (!value)
1385 return config_error_nonbool(var);
1386 else if (!strcmp(value, "never"))
1387 autorebase = AUTOREBASE_NEVER;
1388 else if (!strcmp(value, "local"))
1389 autorebase = AUTOREBASE_LOCAL;
1390 else if (!strcmp(value, "remote"))
1391 autorebase = AUTOREBASE_REMOTE;
1392 else if (!strcmp(value, "always"))
1393 autorebase = AUTOREBASE_ALWAYS;
1394 else
1395 return error(_("malformed value for %s"), var);
1396 return 0;
1397 }
1398
1399 /* Add other config variables here and to Documentation/config.txt. */
1400 return 0;
1401 }
1402
1403 static int git_default_push_config(const char *var, const char *value)
1404 {
1405 if (!strcmp(var, "push.default")) {
1406 if (!value)
1407 return config_error_nonbool(var);
1408 else if (!strcmp(value, "nothing"))
1409 push_default = PUSH_DEFAULT_NOTHING;
1410 else if (!strcmp(value, "matching"))
1411 push_default = PUSH_DEFAULT_MATCHING;
1412 else if (!strcmp(value, "simple"))
1413 push_default = PUSH_DEFAULT_SIMPLE;
1414 else if (!strcmp(value, "upstream"))
1415 push_default = PUSH_DEFAULT_UPSTREAM;
1416 else if (!strcmp(value, "tracking")) /* deprecated */
1417 push_default = PUSH_DEFAULT_UPSTREAM;
1418 else if (!strcmp(value, "current"))
1419 push_default = PUSH_DEFAULT_CURRENT;
1420 else {
1421 error(_("malformed value for %s: %s"), var, value);
1422 return error(_("must be one of nothing, matching, simple, "
1423 "upstream or current"));
1424 }
1425 return 0;
1426 }
1427
1428 /* Add other config variables here and to Documentation/config.txt. */
1429 return 0;
1430 }
1431
1432 static int git_default_mailmap_config(const char *var, const char *value)
1433 {
1434 if (!strcmp(var, "mailmap.file"))
1435 return git_config_pathname(&git_mailmap_file, var, value);
1436 if (!strcmp(var, "mailmap.blob"))
1437 return git_config_string(&git_mailmap_blob, var, value);
1438
1439 /* Add other config variables here and to Documentation/config.txt. */
1440 return 0;
1441 }
1442
1443 int git_default_config(const char *var, const char *value, void *cb)
1444 {
1445 if (starts_with(var, "core."))
1446 return git_default_core_config(var, value, cb);
1447
1448 if (starts_with(var, "user.") ||
1449 starts_with(var, "author.") ||
1450 starts_with(var, "committer."))
1451 return git_ident_config(var, value, cb);
1452
1453 if (starts_with(var, "i18n."))
1454 return git_default_i18n_config(var, value);
1455
1456 if (starts_with(var, "branch."))
1457 return git_default_branch_config(var, value);
1458
1459 if (starts_with(var, "push."))
1460 return git_default_push_config(var, value);
1461
1462 if (starts_with(var, "mailmap."))
1463 return git_default_mailmap_config(var, value);
1464
1465 if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
1466 return git_default_advice_config(var, value);
1467
1468 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1469 pager_use_color = git_config_bool(var,value);
1470 return 0;
1471 }
1472
1473 if (!strcmp(var, "pack.packsizelimit")) {
1474 pack_size_limit_cfg = git_config_ulong(var, value);
1475 return 0;
1476 }
1477
1478 if (!strcmp(var, "pack.compression")) {
1479 int level = git_config_int(var, value);
1480 if (level == -1)
1481 level = Z_DEFAULT_COMPRESSION;
1482 else if (level < 0 || level > Z_BEST_COMPRESSION)
1483 die(_("bad pack compression level %d"), level);
1484 pack_compression_level = level;
1485 pack_compression_seen = 1;
1486 return 0;
1487 }
1488
1489 /* Add other config variables here and to Documentation/config.txt. */
1490 return 0;
1491 }
1492
1493 /*
1494 * All source specific fields in the union, die_on_error, name and the callbacks
1495 * fgetc, ungetc, ftell of top need to be initialized before calling
1496 * this function.
1497 */
1498 static int do_config_from(struct config_source *top, config_fn_t fn, void *data,
1499 const struct config_options *opts)
1500 {
1501 int ret;
1502
1503 /* push config-file parsing state stack */
1504 top->prev = cf;
1505 top->linenr = 1;
1506 top->eof = 0;
1507 strbuf_init(&top->value, 1024);
1508 strbuf_init(&top->var, 1024);
1509 cf = top;
1510
1511 ret = git_parse_source(fn, data, opts);
1512
1513 /* pop config-file parsing state stack */
1514 strbuf_release(&top->value);
1515 strbuf_release(&top->var);
1516 cf = top->prev;
1517
1518 return ret;
1519 }
1520
1521 static int do_config_from_file(config_fn_t fn,
1522 const enum config_origin_type origin_type,
1523 const char *name, const char *path, FILE *f,
1524 void *data, const struct config_options *opts)
1525 {
1526 struct config_source top;
1527 int ret;
1528
1529 top.u.file = f;
1530 top.origin_type = origin_type;
1531 top.name = name;
1532 top.path = path;
1533 top.default_error_action = CONFIG_ERROR_DIE;
1534 top.do_fgetc = config_file_fgetc;
1535 top.do_ungetc = config_file_ungetc;
1536 top.do_ftell = config_file_ftell;
1537
1538 flockfile(f);
1539 ret = do_config_from(&top, fn, data, opts);
1540 funlockfile(f);
1541 return ret;
1542 }
1543
1544 static int git_config_from_stdin(config_fn_t fn, void *data)
1545 {
1546 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin,
1547 data, NULL);
1548 }
1549
1550 int git_config_from_file_with_options(config_fn_t fn, const char *filename,
1551 void *data,
1552 const struct config_options *opts)
1553 {
1554 int ret = -1;
1555 FILE *f;
1556
1557 f = fopen_or_warn(filename, "r");
1558 if (f) {
1559 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename,
1560 filename, f, data, opts);
1561 fclose(f);
1562 }
1563 return ret;
1564 }
1565
1566 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1567 {
1568 return git_config_from_file_with_options(fn, filename, data, NULL);
1569 }
1570
1571 int git_config_from_mem(config_fn_t fn,
1572 const enum config_origin_type origin_type,
1573 const char *name, const char *buf, size_t len,
1574 void *data, const struct config_options *opts)
1575 {
1576 struct config_source top;
1577
1578 top.u.buf.buf = buf;
1579 top.u.buf.len = len;
1580 top.u.buf.pos = 0;
1581 top.origin_type = origin_type;
1582 top.name = name;
1583 top.path = NULL;
1584 top.default_error_action = CONFIG_ERROR_ERROR;
1585 top.do_fgetc = config_buf_fgetc;
1586 top.do_ungetc = config_buf_ungetc;
1587 top.do_ftell = config_buf_ftell;
1588
1589 return do_config_from(&top, fn, data, opts);
1590 }
1591
1592 int git_config_from_blob_oid(config_fn_t fn,
1593 const char *name,
1594 const struct object_id *oid,
1595 void *data)
1596 {
1597 enum object_type type;
1598 char *buf;
1599 unsigned long size;
1600 int ret;
1601
1602 buf = read_object_file(oid, &type, &size);
1603 if (!buf)
1604 return error(_("unable to load config blob object '%s'"), name);
1605 if (type != OBJ_BLOB) {
1606 free(buf);
1607 return error(_("reference '%s' does not point to a blob"), name);
1608 }
1609
1610 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
1611 data, NULL);
1612 free(buf);
1613
1614 return ret;
1615 }
1616
1617 static int git_config_from_blob_ref(config_fn_t fn,
1618 const char *name,
1619 void *data)
1620 {
1621 struct object_id oid;
1622
1623 if (get_oid(name, &oid) < 0)
1624 return error(_("unable to resolve config blob '%s'"), name);
1625 return git_config_from_blob_oid(fn, name, &oid, data);
1626 }
1627
1628 const char *git_etc_gitconfig(void)
1629 {
1630 static const char *system_wide;
1631 if (!system_wide)
1632 system_wide = system_path(ETC_GITCONFIG);
1633 return system_wide;
1634 }
1635
1636 /*
1637 * Parse environment variable 'k' as a boolean (in various
1638 * possible spellings); if missing, use the default value 'def'.
1639 */
1640 int git_env_bool(const char *k, int def)
1641 {
1642 const char *v = getenv(k);
1643 return v ? git_config_bool(k, v) : def;
1644 }
1645
1646 /*
1647 * Parse environment variable 'k' as ulong with possibly a unit
1648 * suffix; if missing, use the default value 'val'.
1649 */
1650 unsigned long git_env_ulong(const char *k, unsigned long val)
1651 {
1652 const char *v = getenv(k);
1653 if (v && !git_parse_ulong(v, &val))
1654 die(_("failed to parse %s"), k);
1655 return val;
1656 }
1657
1658 int git_config_system(void)
1659 {
1660 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1661 }
1662
1663 static int do_git_config_sequence(const struct config_options *opts,
1664 config_fn_t fn, void *data)
1665 {
1666 int ret = 0;
1667 char *xdg_config = xdg_config_home("config");
1668 char *user_config = expand_user_path("~/.gitconfig", 0);
1669 char *repo_config;
1670
1671 if (opts->commondir)
1672 repo_config = mkpathdup("%s/config", opts->commondir);
1673 else if (opts->git_dir)
1674 BUG("git_dir without commondir");
1675 else
1676 repo_config = NULL;
1677
1678 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1679 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK,
1680 opts->system_gently ?
1681 ACCESS_EACCES_OK : 0))
1682 ret += git_config_from_file(fn, git_etc_gitconfig(),
1683 data);
1684
1685 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1686 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1687 ret += git_config_from_file(fn, xdg_config, data);
1688
1689 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1690 ret += git_config_from_file(fn, user_config, data);
1691
1692 current_parsing_scope = CONFIG_SCOPE_REPO;
1693 if (!opts->ignore_repo && repo_config &&
1694 !access_or_die(repo_config, R_OK, 0))
1695 ret += git_config_from_file(fn, repo_config, data);
1696
1697 /*
1698 * Note: this should have a new scope, CONFIG_SCOPE_WORKTREE.
1699 * But let's not complicate things before it's actually needed.
1700 */
1701 if (!opts->ignore_worktree && repository_format_worktree_config) {
1702 char *path = git_pathdup("config.worktree");
1703 if (!access_or_die(path, R_OK, 0))
1704 ret += git_config_from_file(fn, path, data);
1705 free(path);
1706 }
1707
1708 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1709 if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
1710 die(_("unable to parse command-line config"));
1711
1712 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1713 free(xdg_config);
1714 free(user_config);
1715 free(repo_config);
1716 return ret;
1717 }
1718
1719 int config_with_options(config_fn_t fn, void *data,
1720 struct git_config_source *config_source,
1721 const struct config_options *opts)
1722 {
1723 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1724
1725 if (opts->respect_includes) {
1726 inc.fn = fn;
1727 inc.data = data;
1728 inc.opts = opts;
1729 fn = git_config_include;
1730 data = &inc;
1731 }
1732
1733 /*
1734 * If we have a specific filename, use it. Otherwise, follow the
1735 * regular lookup sequence.
1736 */
1737 if (config_source && config_source->use_stdin)
1738 return git_config_from_stdin(fn, data);
1739 else if (config_source && config_source->file)
1740 return git_config_from_file(fn, config_source->file, data);
1741 else if (config_source && config_source->blob)
1742 return git_config_from_blob_ref(fn, config_source->blob, data);
1743
1744 return do_git_config_sequence(opts, fn, data);
1745 }
1746
1747 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1748 {
1749 int i, value_index;
1750 struct string_list *values;
1751 struct config_set_element *entry;
1752 struct configset_list *list = &cs->list;
1753
1754 for (i = 0; i < list->nr; i++) {
1755 entry = list->items[i].e;
1756 value_index = list->items[i].value_index;
1757 values = &entry->value_list;
1758
1759 current_config_kvi = values->items[value_index].util;
1760
1761 if (fn(entry->key, values->items[value_index].string, data) < 0)
1762 git_die_config_linenr(entry->key,
1763 current_config_kvi->filename,
1764 current_config_kvi->linenr);
1765
1766 current_config_kvi = NULL;
1767 }
1768 }
1769
1770 void read_early_config(config_fn_t cb, void *data)
1771 {
1772 struct config_options opts = {0};
1773 struct strbuf commondir = STRBUF_INIT;
1774 struct strbuf gitdir = STRBUF_INIT;
1775
1776 opts.respect_includes = 1;
1777
1778 if (have_git_dir()) {
1779 opts.commondir = get_git_common_dir();
1780 opts.git_dir = get_git_dir();
1781 /*
1782 * When setup_git_directory() was not yet asked to discover the
1783 * GIT_DIR, we ask discover_git_directory() to figure out whether there
1784 * is any repository config we should use (but unlike
1785 * setup_git_directory_gently(), no global state is changed, most
1786 * notably, the current working directory is still the same after the
1787 * call).
1788 */
1789 } else if (!discover_git_directory(&commondir, &gitdir)) {
1790 opts.commondir = commondir.buf;
1791 opts.git_dir = gitdir.buf;
1792 }
1793
1794 config_with_options(cb, data, NULL, &opts);
1795
1796 strbuf_release(&commondir);
1797 strbuf_release(&gitdir);
1798 }
1799
1800 /*
1801 * Read config but only enumerate system and global settings.
1802 * Omit any repo-local, worktree-local, or command-line settings.
1803 */
1804 void read_very_early_config(config_fn_t cb, void *data)
1805 {
1806 struct config_options opts = { 0 };
1807
1808 opts.respect_includes = 1;
1809 opts.ignore_repo = 1;
1810 opts.ignore_worktree = 1;
1811 opts.ignore_cmdline = 1;
1812 opts.system_gently = 1;
1813
1814 config_with_options(cb, data, NULL, &opts);
1815 }
1816
1817 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1818 {
1819 struct config_set_element k;
1820 struct config_set_element *found_entry;
1821 char *normalized_key;
1822 /*
1823 * `key` may come from the user, so normalize it before using it
1824 * for querying entries from the hashmap.
1825 */
1826 if (git_config_parse_key(key, &normalized_key, NULL))
1827 return NULL;
1828
1829 hashmap_entry_init(&k, strhash(normalized_key));
1830 k.key = normalized_key;
1831 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1832 free(normalized_key);
1833 return found_entry;
1834 }
1835
1836 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1837 {
1838 struct config_set_element *e;
1839 struct string_list_item *si;
1840 struct configset_list_item *l_item;
1841 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1842
1843 e = configset_find_element(cs, key);
1844 /*
1845 * Since the keys are being fed by git_config*() callback mechanism, they
1846 * are already normalized. So simply add them without any further munging.
1847 */
1848 if (!e) {
1849 e = xmalloc(sizeof(*e));
1850 hashmap_entry_init(e, strhash(key));
1851 e->key = xstrdup(key);
1852 string_list_init(&e->value_list, 1);
1853 hashmap_add(&cs->config_hash, e);
1854 }
1855 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1856
1857 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1858 l_item = &cs->list.items[cs->list.nr++];
1859 l_item->e = e;
1860 l_item->value_index = e->value_list.nr - 1;
1861
1862 if (!cf)
1863 BUG("configset_add_value has no source");
1864 if (cf->name) {
1865 kv_info->filename = strintern(cf->name);
1866 kv_info->linenr = cf->linenr;
1867 kv_info->origin_type = cf->origin_type;
1868 } else {
1869 /* for values read from `git_config_from_parameters()` */
1870 kv_info->filename = NULL;
1871 kv_info->linenr = -1;
1872 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1873 }
1874 kv_info->scope = current_parsing_scope;
1875 si->util = kv_info;
1876
1877 return 0;
1878 }
1879
1880 static int config_set_element_cmp(const void *unused_cmp_data,
1881 const void *entry,
1882 const void *entry_or_key,
1883 const void *unused_keydata)
1884 {
1885 const struct config_set_element *e1 = entry;
1886 const struct config_set_element *e2 = entry_or_key;
1887
1888 return strcmp(e1->key, e2->key);
1889 }
1890
1891 void git_configset_init(struct config_set *cs)
1892 {
1893 hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0);
1894 cs->hash_initialized = 1;
1895 cs->list.nr = 0;
1896 cs->list.alloc = 0;
1897 cs->list.items = NULL;
1898 }
1899
1900 void git_configset_clear(struct config_set *cs)
1901 {
1902 struct config_set_element *entry;
1903 struct hashmap_iter iter;
1904 if (!cs->hash_initialized)
1905 return;
1906
1907 hashmap_iter_init(&cs->config_hash, &iter);
1908 while ((entry = hashmap_iter_next(&iter))) {
1909 free(entry->key);
1910 string_list_clear(&entry->value_list, 1);
1911 }
1912 hashmap_free(&cs->config_hash, 1);
1913 cs->hash_initialized = 0;
1914 free(cs->list.items);
1915 cs->list.nr = 0;
1916 cs->list.alloc = 0;
1917 cs->list.items = NULL;
1918 }
1919
1920 static int config_set_callback(const char *key, const char *value, void *cb)
1921 {
1922 struct config_set *cs = cb;
1923 configset_add_value(cs, key, value);
1924 return 0;
1925 }
1926
1927 int git_configset_add_file(struct config_set *cs, const char *filename)
1928 {
1929 return git_config_from_file(config_set_callback, filename, cs);
1930 }
1931
1932 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1933 {
1934 const struct string_list *values = NULL;
1935 /*
1936 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1937 * queried key in the files of the configset, the value returned will be the last
1938 * value in the value list for that key.
1939 */
1940 values = git_configset_get_value_multi(cs, key);
1941
1942 if (!values)
1943 return 1;
1944 assert(values->nr > 0);
1945 *value = values->items[values->nr - 1].string;
1946 return 0;
1947 }
1948
1949 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1950 {
1951 struct config_set_element *e = configset_find_element(cs, key);
1952 return e ? &e->value_list : NULL;
1953 }
1954
1955 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1956 {
1957 const char *value;
1958 if (!git_configset_get_value(cs, key, &value))
1959 return git_config_string(dest, key, value);
1960 else
1961 return 1;
1962 }
1963
1964 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1965 {
1966 return git_configset_get_string_const(cs, key, (const char **)dest);
1967 }
1968
1969 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1970 {
1971 const char *value;
1972 if (!git_configset_get_value(cs, key, &value)) {
1973 *dest = git_config_int(key, value);
1974 return 0;
1975 } else
1976 return 1;
1977 }
1978
1979 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1980 {
1981 const char *value;
1982 if (!git_configset_get_value(cs, key, &value)) {
1983 *dest = git_config_ulong(key, value);
1984 return 0;
1985 } else
1986 return 1;
1987 }
1988
1989 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1990 {
1991 const char *value;
1992 if (!git_configset_get_value(cs, key, &value)) {
1993 *dest = git_config_bool(key, value);
1994 return 0;
1995 } else
1996 return 1;
1997 }
1998
1999 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
2000 int *is_bool, int *dest)
2001 {
2002 const char *value;
2003 if (!git_configset_get_value(cs, key, &value)) {
2004 *dest = git_config_bool_or_int(key, value, is_bool);
2005 return 0;
2006 } else
2007 return 1;
2008 }
2009
2010 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
2011 {
2012 const char *value;
2013 if (!git_configset_get_value(cs, key, &value)) {
2014 *dest = git_parse_maybe_bool(value);
2015 if (*dest == -1)
2016 return -1;
2017 return 0;
2018 } else
2019 return 1;
2020 }
2021
2022 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
2023 {
2024 const char *value;
2025 if (!git_configset_get_value(cs, key, &value))
2026 return git_config_pathname(dest, key, value);
2027 else
2028 return 1;
2029 }
2030
2031 /* Functions use to read configuration from a repository */
2032 static void repo_read_config(struct repository *repo)
2033 {
2034 struct config_options opts = { 0 };
2035
2036 opts.respect_includes = 1;
2037 opts.commondir = repo->commondir;
2038 opts.git_dir = repo->gitdir;
2039
2040 if (!repo->config)
2041 repo->config = xcalloc(1, sizeof(struct config_set));
2042 else
2043 git_configset_clear(repo->config);
2044
2045 git_configset_init(repo->config);
2046
2047 if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
2048 /*
2049 * config_with_options() normally returns only
2050 * zero, as most errors are fatal, and
2051 * non-fatal potential errors are guarded by "if"
2052 * statements that are entered only when no error is
2053 * possible.
2054 *
2055 * If we ever encounter a non-fatal error, it means
2056 * something went really wrong and we should stop
2057 * immediately.
2058 */
2059 die(_("unknown error occurred while reading the configuration files"));
2060 }
2061
2062 static void git_config_check_init(struct repository *repo)
2063 {
2064 if (repo->config && repo->config->hash_initialized)
2065 return;
2066 repo_read_config(repo);
2067 }
2068
2069 static void repo_config_clear(struct repository *repo)
2070 {
2071 if (!repo->config || !repo->config->hash_initialized)
2072 return;
2073 git_configset_clear(repo->config);
2074 }
2075
2076 void repo_config(struct repository *repo, config_fn_t fn, void *data)
2077 {
2078 git_config_check_init(repo);
2079 configset_iter(repo->config, fn, data);
2080 }
2081
2082 int repo_config_get_value(struct repository *repo,
2083 const char *key, const char **value)
2084 {
2085 git_config_check_init(repo);
2086 return git_configset_get_value(repo->config, key, value);
2087 }
2088
2089 const struct string_list *repo_config_get_value_multi(struct repository *repo,
2090 const char *key)
2091 {
2092 git_config_check_init(repo);
2093 return git_configset_get_value_multi(repo->config, key);
2094 }
2095
2096 int repo_config_get_string_const(struct repository *repo,
2097 const char *key, const char **dest)
2098 {
2099 int ret;
2100 git_config_check_init(repo);
2101 ret = git_configset_get_string_const(repo->config, key, dest);
2102 if (ret < 0)
2103 git_die_config(key, NULL);
2104 return ret;
2105 }
2106
2107 int repo_config_get_string(struct repository *repo,
2108 const char *key, char **dest)
2109 {
2110 git_config_check_init(repo);
2111 return repo_config_get_string_const(repo, key, (const char **)dest);
2112 }
2113
2114 int repo_config_get_int(struct repository *repo,
2115 const char *key, int *dest)
2116 {
2117 git_config_check_init(repo);
2118 return git_configset_get_int(repo->config, key, dest);
2119 }
2120
2121 int repo_config_get_ulong(struct repository *repo,
2122 const char *key, unsigned long *dest)
2123 {
2124 git_config_check_init(repo);
2125 return git_configset_get_ulong(repo->config, key, dest);
2126 }
2127
2128 int repo_config_get_bool(struct repository *repo,
2129 const char *key, int *dest)
2130 {
2131 git_config_check_init(repo);
2132 return git_configset_get_bool(repo->config, key, dest);
2133 }
2134
2135 int repo_config_get_bool_or_int(struct repository *repo,
2136 const char *key, int *is_bool, int *dest)
2137 {
2138 git_config_check_init(repo);
2139 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2140 }
2141
2142 int repo_config_get_maybe_bool(struct repository *repo,
2143 const char *key, int *dest)
2144 {
2145 git_config_check_init(repo);
2146 return git_configset_get_maybe_bool(repo->config, key, dest);
2147 }
2148
2149 int repo_config_get_pathname(struct repository *repo,
2150 const char *key, const char **dest)
2151 {
2152 int ret;
2153 git_config_check_init(repo);
2154 ret = git_configset_get_pathname(repo->config, key, dest);
2155 if (ret < 0)
2156 git_die_config(key, NULL);
2157 return ret;
2158 }
2159
2160 /* Functions used historically to read configuration from 'the_repository' */
2161 void git_config(config_fn_t fn, void *data)
2162 {
2163 repo_config(the_repository, fn, data);
2164 }
2165
2166 void git_config_clear(void)
2167 {
2168 repo_config_clear(the_repository);
2169 }
2170
2171 int git_config_get_value(const char *key, const char **value)
2172 {
2173 return repo_config_get_value(the_repository, key, value);
2174 }
2175
2176 const struct string_list *git_config_get_value_multi(const char *key)
2177 {
2178 return repo_config_get_value_multi(the_repository, key);
2179 }
2180
2181 int git_config_get_string_const(const char *key, const char **dest)
2182 {
2183 return repo_config_get_string_const(the_repository, key, dest);
2184 }
2185
2186 int git_config_get_string(const char *key, char **dest)
2187 {
2188 return repo_config_get_string(the_repository, key, dest);
2189 }
2190
2191 int git_config_get_int(const char *key, int *dest)
2192 {
2193 return repo_config_get_int(the_repository, key, dest);
2194 }
2195
2196 int git_config_get_ulong(const char *key, unsigned long *dest)
2197 {
2198 return repo_config_get_ulong(the_repository, key, dest);
2199 }
2200
2201 int git_config_get_bool(const char *key, int *dest)
2202 {
2203 return repo_config_get_bool(the_repository, key, dest);
2204 }
2205
2206 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2207 {
2208 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2209 }
2210
2211 int git_config_get_maybe_bool(const char *key, int *dest)
2212 {
2213 return repo_config_get_maybe_bool(the_repository, key, dest);
2214 }
2215
2216 int git_config_get_pathname(const char *key, const char **dest)
2217 {
2218 return repo_config_get_pathname(the_repository, key, dest);
2219 }
2220
2221 int git_config_get_expiry(const char *key, const char **output)
2222 {
2223 int ret = git_config_get_string_const(key, output);
2224 if (ret)
2225 return ret;
2226 if (strcmp(*output, "now")) {
2227 timestamp_t now = approxidate("now");
2228 if (approxidate(*output) >= now)
2229 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2230 }
2231 return ret;
2232 }
2233
2234 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2235 {
2236 char *expiry_string;
2237 intmax_t days;
2238 timestamp_t when;
2239
2240 if (git_config_get_string(key, &expiry_string))
2241 return 1; /* no such thing */
2242
2243 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2244 const int scale = 86400;
2245 *expiry = now - days * scale;
2246 return 0;
2247 }
2248
2249 if (!parse_expiry_date(expiry_string, &when)) {
2250 *expiry = when;
2251 return 0;
2252 }
2253 return -1; /* thing exists but cannot be parsed */
2254 }
2255
2256 int git_config_get_untracked_cache(void)
2257 {
2258 int val = -1;
2259 const char *v;
2260
2261 /* Hack for test programs like test-dump-untracked-cache */
2262 if (ignore_untracked_cache_config)
2263 return -1;
2264
2265 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
2266 return val;
2267
2268 if (!git_config_get_value("core.untrackedcache", &v)) {
2269 if (!strcasecmp(v, "keep"))
2270 return -1;
2271
2272 error(_("unknown core.untrackedCache value '%s'; "
2273 "using 'keep' default value"), v);
2274 return -1;
2275 }
2276
2277 return -1; /* default value */
2278 }
2279
2280 int git_config_get_split_index(void)
2281 {
2282 int val;
2283
2284 if (!git_config_get_maybe_bool("core.splitindex", &val))
2285 return val;
2286
2287 return -1; /* default value */
2288 }
2289
2290 int git_config_get_max_percent_split_change(void)
2291 {
2292 int val = -1;
2293
2294 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2295 if (0 <= val && val <= 100)
2296 return val;
2297
2298 return error(_("splitIndex.maxPercentChange value '%d' "
2299 "should be between 0 and 100"), val);
2300 }
2301
2302 return -1; /* default value */
2303 }
2304
2305 int git_config_get_fsmonitor(void)
2306 {
2307 if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
2308 core_fsmonitor = getenv("GIT_TEST_FSMONITOR");
2309
2310 if (core_fsmonitor && !*core_fsmonitor)
2311 core_fsmonitor = NULL;
2312
2313 if (core_fsmonitor)
2314 return 1;
2315
2316 return 0;
2317 }
2318
2319 int git_config_get_index_threads(int *dest)
2320 {
2321 int is_bool, val;
2322
2323 val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
2324 if (val) {
2325 *dest = val;
2326 return 0;
2327 }
2328
2329 if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
2330 if (is_bool)
2331 *dest = val ? 0 : 1;
2332 else
2333 *dest = val;
2334 return 0;
2335 }
2336
2337 return 1;
2338 }
2339
2340 NORETURN
2341 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2342 {
2343 if (!filename)
2344 die(_("unable to parse '%s' from command-line config"), key);
2345 else
2346 die(_("bad config variable '%s' in file '%s' at line %d"),
2347 key, filename, linenr);
2348 }
2349
2350 NORETURN __attribute__((format(printf, 2, 3)))
2351 void git_die_config(const char *key, const char *err, ...)
2352 {
2353 const struct string_list *values;
2354 struct key_value_info *kv_info;
2355
2356 if (err) {
2357 va_list params;
2358 va_start(params, err);
2359 vreportf("error: ", err, params);
2360 va_end(params);
2361 }
2362 values = git_config_get_value_multi(key);
2363 kv_info = values->items[values->nr - 1].util;
2364 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2365 }
2366
2367 /*
2368 * Find all the stuff for git_config_set() below.
2369 */
2370
2371 struct config_store_data {
2372 int baselen;
2373 char *key;
2374 int do_not_match;
2375 regex_t *value_regex;
2376 int multi_replace;
2377 struct {
2378 size_t begin, end;
2379 enum config_event_t type;
2380 int is_keys_section;
2381 } *parsed;
2382 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
2383 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
2384 };
2385
2386 static void config_store_data_clear(struct config_store_data *store)
2387 {
2388 free(store->key);
2389 if (store->value_regex != NULL &&
2390 store->value_regex != CONFIG_REGEX_NONE) {
2391 regfree(store->value_regex);
2392 free(store->value_regex);
2393 }
2394 free(store->parsed);
2395 free(store->seen);
2396 memset(store, 0, sizeof(*store));
2397 }
2398
2399 static int matches(const char *key, const char *value,
2400 const struct config_store_data *store)
2401 {
2402 if (strcmp(key, store->key))
2403 return 0; /* not ours */
2404 if (!store->value_regex)
2405 return 1; /* always matches */
2406 if (store->value_regex == CONFIG_REGEX_NONE)
2407 return 0; /* never matches */
2408
2409 return store->do_not_match ^
2410 (value && !regexec(store->value_regex, value, 0, NULL, 0));
2411 }
2412
2413 static int store_aux_event(enum config_event_t type,
2414 size_t begin, size_t end, void *data)
2415 {
2416 struct config_store_data *store = data;
2417
2418 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
2419 store->parsed[store->parsed_nr].begin = begin;
2420 store->parsed[store->parsed_nr].end = end;
2421 store->parsed[store->parsed_nr].type = type;
2422
2423 if (type == CONFIG_EVENT_SECTION) {
2424 int (*cmpfn)(const char *, const char *, size_t);
2425
2426 if (cf->var.len < 2 || cf->var.buf[cf->var.len - 1] != '.')
2427 return error(_("invalid section name '%s'"), cf->var.buf);
2428
2429 if (cf->subsection_case_sensitive)
2430 cmpfn = strncasecmp;
2431 else
2432 cmpfn = strncmp;
2433
2434 /* Is this the section we were looking for? */
2435 store->is_keys_section =
2436 store->parsed[store->parsed_nr].is_keys_section =
2437 cf->var.len - 1 == store->baselen &&
2438 !cmpfn(cf->var.buf, store->key, store->baselen);
2439 if (store->is_keys_section) {
2440 store->section_seen = 1;
2441 ALLOC_GROW(store->seen, store->seen_nr + 1,
2442 store->seen_alloc);
2443 store->seen[store->seen_nr] = store->parsed_nr;
2444 }
2445 }
2446
2447 store->parsed_nr++;
2448
2449 return 0;
2450 }
2451
2452 static int store_aux(const char *key, const char *value, void *cb)
2453 {
2454 struct config_store_data *store = cb;
2455
2456 if (store->key_seen) {
2457 if (matches(key, value, store)) {
2458 if (store->seen_nr == 1 && store->multi_replace == 0) {
2459 warning(_("%s has multiple values"), key);
2460 }
2461
2462 ALLOC_GROW(store->seen, store->seen_nr + 1,
2463 store->seen_alloc);
2464
2465 store->seen[store->seen_nr] = store->parsed_nr;
2466 store->seen_nr++;
2467 }
2468 } else if (store->is_keys_section) {
2469 /*
2470 * Do not increment matches yet: this may not be a match, but we
2471 * are in the desired section.
2472 */
2473 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
2474 store->seen[store->seen_nr] = store->parsed_nr;
2475 store->section_seen = 1;
2476
2477 if (matches(key, value, store)) {
2478 store->seen_nr++;
2479 store->key_seen = 1;
2480 }
2481 }
2482
2483 return 0;
2484 }
2485
2486 static int write_error(const char *filename)
2487 {
2488 error(_("failed to write new configuration file %s"), filename);
2489
2490 /* Same error code as "failed to rename". */
2491 return 4;
2492 }
2493
2494 static struct strbuf store_create_section(const char *key,
2495 const struct config_store_data *store)
2496 {
2497 const char *dot;
2498 int i;
2499 struct strbuf sb = STRBUF_INIT;
2500
2501 dot = memchr(key, '.', store->baselen);
2502 if (dot) {
2503 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2504 for (i = dot - key + 1; i < store->baselen; i++) {
2505 if (key[i] == '"' || key[i] == '\\')
2506 strbuf_addch(&sb, '\\');
2507 strbuf_addch(&sb, key[i]);
2508 }
2509 strbuf_addstr(&sb, "\"]\n");
2510 } else {
2511 strbuf_addf(&sb, "[%.*s]\n", store->baselen, key);
2512 }
2513
2514 return sb;
2515 }
2516
2517 static ssize_t write_section(int fd, const char *key,
2518 const struct config_store_data *store)
2519 {
2520 struct strbuf sb = store_create_section(key, store);
2521 ssize_t ret;
2522
2523 ret = write_in_full(fd, sb.buf, sb.len);
2524 strbuf_release(&sb);
2525
2526 return ret;
2527 }
2528
2529 static ssize_t write_pair(int fd, const char *key, const char *value,
2530 const struct config_store_data *store)
2531 {
2532 int i;
2533 ssize_t ret;
2534 int length = strlen(key + store->baselen + 1);
2535 const char *quote = "";
2536 struct strbuf sb = STRBUF_INIT;
2537
2538 /*
2539 * Check to see if the value needs to be surrounded with a dq pair.
2540 * Note that problematic characters are always backslash-quoted; this
2541 * check is about not losing leading or trailing SP and strings that
2542 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2543 * configuration parser.
2544 */
2545 if (value[0] == ' ')
2546 quote = "\"";
2547 for (i = 0; value[i]; i++)
2548 if (value[i] == ';' || value[i] == '#')
2549 quote = "\"";
2550 if (i && value[i - 1] == ' ')
2551 quote = "\"";
2552
2553 strbuf_addf(&sb, "\t%.*s = %s",
2554 length, key + store->baselen + 1, quote);
2555
2556 for (i = 0; value[i]; i++)
2557 switch (value[i]) {
2558 case '\n':
2559 strbuf_addstr(&sb, "\\n");
2560 break;
2561 case '\t':
2562 strbuf_addstr(&sb, "\\t");
2563 break;
2564 case '"':
2565 case '\\':
2566 strbuf_addch(&sb, '\\');
2567 /* fallthrough */
2568 default:
2569 strbuf_addch(&sb, value[i]);
2570 break;
2571 }
2572 strbuf_addf(&sb, "%s\n", quote);
2573
2574 ret = write_in_full(fd, sb.buf, sb.len);
2575 strbuf_release(&sb);
2576
2577 return ret;
2578 }
2579
2580 /*
2581 * If we are about to unset the last key(s) in a section, and if there are
2582 * no comments surrounding (or included in) the section, we will want to
2583 * extend begin/end to remove the entire section.
2584 *
2585 * Note: the parameter `seen_ptr` points to the index into the store.seen
2586 * array. * This index may be incremented if a section has more than one
2587 * entry (which all are to be removed).
2588 */
2589 static void maybe_remove_section(struct config_store_data *store,
2590 size_t *begin_offset, size_t *end_offset,
2591 int *seen_ptr)
2592 {
2593 size_t begin;
2594 int i, seen, section_seen = 0;
2595
2596 /*
2597 * First, ensure that this is the first key, and that there are no
2598 * comments before the entry nor before the section header.
2599 */
2600 seen = *seen_ptr;
2601 for (i = store->seen[seen]; i > 0; i--) {
2602 enum config_event_t type = store->parsed[i - 1].type;
2603
2604 if (type == CONFIG_EVENT_COMMENT)
2605 /* There is a comment before this entry or section */
2606 return;
2607 if (type == CONFIG_EVENT_ENTRY) {
2608 if (!section_seen)
2609 /* This is not the section's first entry. */
2610 return;
2611 /* We encountered no comment before the section. */
2612 break;
2613 }
2614 if (type == CONFIG_EVENT_SECTION) {
2615 if (!store->parsed[i - 1].is_keys_section)
2616 break;
2617 section_seen = 1;
2618 }
2619 }
2620 begin = store->parsed[i].begin;
2621
2622 /*
2623 * Next, make sure that we are removing he last key(s) in the section,
2624 * and that there are no comments that are possibly about the current
2625 * section.
2626 */
2627 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
2628 enum config_event_t type = store->parsed[i].type;
2629
2630 if (type == CONFIG_EVENT_COMMENT)
2631 return;
2632 if (type == CONFIG_EVENT_SECTION) {
2633 if (store->parsed[i].is_keys_section)
2634 continue;
2635 break;
2636 }
2637 if (type == CONFIG_EVENT_ENTRY) {
2638 if (++seen < store->seen_nr &&
2639 i == store->seen[seen])
2640 /* We want to remove this entry, too */
2641 continue;
2642 /* There is another entry in this section. */
2643 return;
2644 }
2645 }
2646
2647 /*
2648 * We are really removing the last entry/entries from this section, and
2649 * there are no enclosed or surrounding comments. Remove the entire,
2650 * now-empty section.
2651 */
2652 *seen_ptr = seen;
2653 *begin_offset = begin;
2654 if (i < store->parsed_nr)
2655 *end_offset = store->parsed[i].begin;
2656 else
2657 *end_offset = store->parsed[store->parsed_nr - 1].end;
2658 }
2659
2660 int git_config_set_in_file_gently(const char *config_filename,
2661 const char *key, const char *value)
2662 {
2663 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2664 }
2665
2666 void git_config_set_in_file(const char *config_filename,
2667 const char *key, const char *value)
2668 {
2669 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2670 }
2671
2672 int git_config_set_gently(const char *key, const char *value)
2673 {
2674 return git_config_set_multivar_gently(key, value, NULL, 0);
2675 }
2676
2677 void git_config_set(const char *key, const char *value)
2678 {
2679 git_config_set_multivar(key, value, NULL, 0);
2680
2681 trace2_cmd_set_config(key, value);
2682 }
2683
2684 /*
2685 * If value==NULL, unset in (remove from) config,
2686 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2687 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2688 * (only add a new one)
2689 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2690 * else all matching key/values (regardless how many) are removed,
2691 * before the new pair is written.
2692 *
2693 * Returns 0 on success.
2694 *
2695 * This function does this:
2696 *
2697 * - it locks the config file by creating ".git/config.lock"
2698 *
2699 * - it then parses the config using store_aux() as validator to find
2700 * the position on the key/value pair to replace. If it is to be unset,
2701 * it must be found exactly once.
2702 *
2703 * - the config file is mmap()ed and the part before the match (if any) is
2704 * written to the lock file, then the changed part and the rest.
2705 *
2706 * - the config file is removed and the lock file rename()d to it.
2707 *
2708 */
2709 int git_config_set_multivar_in_file_gently(const char *config_filename,
2710 const char *key, const char *value,
2711 const char *value_regex,
2712 int multi_replace)
2713 {
2714 int fd = -1, in_fd = -1;
2715 int ret;
2716 struct lock_file lock = LOCK_INIT;
2717 char *filename_buf = NULL;
2718 char *contents = NULL;
2719 size_t contents_sz;
2720 struct config_store_data store;
2721
2722 memset(&store, 0, sizeof(store));
2723
2724 /* parse-key returns negative; flip the sign to feed exit(3) */
2725 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2726 if (ret)
2727 goto out_free;
2728
2729 store.multi_replace = multi_replace;
2730
2731 if (!config_filename)
2732 config_filename = filename_buf = git_pathdup("config");
2733
2734 /*
2735 * The lock serves a purpose in addition to locking: the new
2736 * contents of .git/config will be written into it.
2737 */
2738 fd = hold_lock_file_for_update(&lock, config_filename, 0);
2739 if (fd < 0) {
2740 error_errno(_("could not lock config file %s"), config_filename);
2741 ret = CONFIG_NO_LOCK;
2742 goto out_free;
2743 }
2744
2745 /*
2746 * If .git/config does not exist yet, write a minimal version.
2747 */
2748 in_fd = open(config_filename, O_RDONLY);
2749 if ( in_fd < 0 ) {
2750 if ( ENOENT != errno ) {
2751 error_errno(_("opening %s"), config_filename);
2752 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2753 goto out_free;
2754 }
2755 /* if nothing to unset, error out */
2756 if (value == NULL) {
2757 ret = CONFIG_NOTHING_SET;
2758 goto out_free;
2759 }
2760
2761 free(store.key);
2762 store.key = xstrdup(key);
2763 if (write_section(fd, key, &store) < 0 ||
2764 write_pair(fd, key, value, &store) < 0)
2765 goto write_err_out;
2766 } else {
2767 struct stat st;
2768 size_t copy_begin, copy_end;
2769 int i, new_line = 0;
2770 struct config_options opts;
2771
2772 if (value_regex == NULL)
2773 store.value_regex = NULL;
2774 else if (value_regex == CONFIG_REGEX_NONE)
2775 store.value_regex = CONFIG_REGEX_NONE;
2776 else {
2777 if (value_regex[0] == '!') {
2778 store.do_not_match = 1;
2779 value_regex++;
2780 } else
2781 store.do_not_match = 0;
2782
2783 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2784 if (regcomp(store.value_regex, value_regex,
2785 REG_EXTENDED)) {
2786 error(_("invalid pattern: %s"), value_regex);
2787 FREE_AND_NULL(store.value_regex);
2788 ret = CONFIG_INVALID_PATTERN;
2789 goto out_free;
2790 }
2791 }
2792
2793 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
2794 store.parsed[0].end = 0;
2795
2796 memset(&opts, 0, sizeof(opts));
2797 opts.event_fn = store_aux_event;
2798 opts.event_fn_data = &store;
2799
2800 /*
2801 * After this, store.parsed will contain offsets of all the
2802 * parsed elements, and store.seen will contain a list of
2803 * matches, as indices into store.parsed.
2804 *
2805 * As a side effect, we make sure to transform only a valid
2806 * existing config file.
2807 */
2808 if (git_config_from_file_with_options(store_aux,
2809 config_filename,
2810 &store, &opts)) {
2811 error(_("invalid config file %s"), config_filename);
2812 ret = CONFIG_INVALID_FILE;
2813 goto out_free;
2814 }
2815
2816 /* if nothing to unset, or too many matches, error out */
2817 if ((store.seen_nr == 0 && value == NULL) ||
2818 (store.seen_nr > 1 && multi_replace == 0)) {
2819 ret = CONFIG_NOTHING_SET;
2820 goto out_free;
2821 }
2822
2823 if (fstat(in_fd, &st) == -1) {
2824 error_errno(_("fstat on %s failed"), config_filename);
2825 ret = CONFIG_INVALID_FILE;
2826 goto out_free;
2827 }
2828
2829 contents_sz = xsize_t(st.st_size);
2830 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2831 MAP_PRIVATE, in_fd, 0);
2832 if (contents == MAP_FAILED) {
2833 if (errno == ENODEV && S_ISDIR(st.st_mode))
2834 errno = EISDIR;
2835 error_errno(_("unable to mmap '%s'"), config_filename);
2836 ret = CONFIG_INVALID_FILE;
2837 contents = NULL;
2838 goto out_free;
2839 }
2840 close(in_fd);
2841 in_fd = -1;
2842
2843 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
2844 error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
2845 ret = CONFIG_NO_WRITE;
2846 goto out_free;
2847 }
2848
2849 if (store.seen_nr == 0) {
2850 if (!store.seen_alloc) {
2851 /* Did not see key nor section */
2852 ALLOC_GROW(store.seen, 1, store.seen_alloc);
2853 store.seen[0] = store.parsed_nr
2854 - !!store.parsed_nr;
2855 }
2856 store.seen_nr = 1;
2857 }
2858
2859 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
2860 size_t replace_end;
2861 int j = store.seen[i];
2862
2863 new_line = 0;
2864 if (!store.key_seen) {
2865 copy_end = store.parsed[j].end;
2866 /* include '\n' when copying section header */
2867 if (copy_end > 0 && copy_end < contents_sz &&
2868 contents[copy_end - 1] != '\n' &&
2869 contents[copy_end] == '\n')
2870 copy_end++;
2871 replace_end = copy_end;
2872 } else {
2873 replace_end = store.parsed[j].end;
2874 copy_end = store.parsed[j].begin;
2875 if (!value)
2876 maybe_remove_section(&store,
2877 &copy_end,
2878 &replace_end, &i);
2879 /*
2880 * Swallow preceding white-space on the same
2881 * line.
2882 */
2883 while (copy_end > 0 ) {
2884 char c = contents[copy_end - 1];
2885
2886 if (isspace(c) && c != '\n')
2887 copy_end--;
2888 else
2889 break;
2890 }
2891 }
2892
2893 if (copy_end > 0 && contents[copy_end-1] != '\n')
2894 new_line = 1;
2895
2896 /* write the first part of the config */
2897 if (copy_end > copy_begin) {
2898 if (write_in_full(fd, contents + copy_begin,
2899 copy_end - copy_begin) < 0)
2900 goto write_err_out;
2901 if (new_line &&
2902 write_str_in_full(fd, "\n") < 0)
2903 goto write_err_out;
2904 }
2905 copy_begin = replace_end;
2906 }
2907
2908 /* write the pair (value == NULL means unset) */
2909 if (value != NULL) {
2910 if (!store.section_seen) {
2911 if (write_section(fd, key, &store) < 0)
2912 goto write_err_out;
2913 }
2914 if (write_pair(fd, key, value, &store) < 0)
2915 goto write_err_out;
2916 }
2917
2918 /* write the rest of the config */
2919 if (copy_begin < contents_sz)
2920 if (write_in_full(fd, contents + copy_begin,
2921 contents_sz - copy_begin) < 0)
2922 goto write_err_out;
2923
2924 munmap(contents, contents_sz);
2925 contents = NULL;
2926 }
2927
2928 if (commit_lock_file(&lock) < 0) {
2929 error_errno(_("could not write config file %s"), config_filename);
2930 ret = CONFIG_NO_WRITE;
2931 goto out_free;
2932 }
2933
2934 ret = 0;
2935
2936 /* Invalidate the config cache */
2937 git_config_clear();
2938
2939 out_free:
2940 rollback_lock_file(&lock);
2941 free(filename_buf);
2942 if (contents)
2943 munmap(contents, contents_sz);
2944 if (in_fd >= 0)
2945 close(in_fd);
2946 config_store_data_clear(&store);
2947 return ret;
2948
2949 write_err_out:
2950 ret = write_error(get_lock_file_path(&lock));
2951 goto out_free;
2952
2953 }
2954
2955 void git_config_set_multivar_in_file(const char *config_filename,
2956 const char *key, const char *value,
2957 const char *value_regex, int multi_replace)
2958 {
2959 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2960 value_regex, multi_replace))
2961 return;
2962 if (value)
2963 die(_("could not set '%s' to '%s'"), key, value);
2964 else
2965 die(_("could not unset '%s'"), key);
2966 }
2967
2968 int git_config_set_multivar_gently(const char *key, const char *value,
2969 const char *value_regex, int multi_replace)
2970 {
2971 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2972 multi_replace);
2973 }
2974
2975 void git_config_set_multivar(const char *key, const char *value,
2976 const char *value_regex, int multi_replace)
2977 {
2978 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2979 multi_replace);
2980 }
2981
2982 static int section_name_match (const char *buf, const char *name)
2983 {
2984 int i = 0, j = 0, dot = 0;
2985 if (buf[i] != '[')
2986 return 0;
2987 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2988 if (!dot && isspace(buf[i])) {
2989 dot = 1;
2990 if (name[j++] != '.')
2991 break;
2992 for (i++; isspace(buf[i]); i++)
2993 ; /* do nothing */
2994 if (buf[i] != '"')
2995 break;
2996 continue;
2997 }
2998 if (buf[i] == '\\' && dot)
2999 i++;
3000 else if (buf[i] == '"' && dot) {
3001 for (i++; isspace(buf[i]); i++)
3002 ; /* do_nothing */
3003 break;
3004 }
3005 if (buf[i] != name[j++])
3006 break;
3007 }
3008 if (buf[i] == ']' && name[j] == 0) {
3009 /*
3010 * We match, now just find the right length offset by
3011 * gobbling up any whitespace after it, as well
3012 */
3013 i++;
3014 for (; buf[i] && isspace(buf[i]); i++)
3015 ; /* do nothing */
3016 return i;
3017 }
3018 return 0;
3019 }
3020
3021 static int section_name_is_ok(const char *name)
3022 {
3023 /* Empty section names are bogus. */
3024 if (!*name)
3025 return 0;
3026
3027 /*
3028 * Before a dot, we must be alphanumeric or dash. After the first dot,
3029 * anything goes, so we can stop checking.
3030 */
3031 for (; *name && *name != '.'; name++)
3032 if (*name != '-' && !isalnum(*name))
3033 return 0;
3034 return 1;
3035 }
3036
3037 /* if new_name == NULL, the section is removed instead */
3038 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
3039 const char *old_name,
3040 const char *new_name, int copy)
3041 {
3042 int ret = 0, remove = 0;
3043 char *filename_buf = NULL;
3044 struct lock_file lock = LOCK_INIT;
3045 int out_fd;
3046 char buf[1024];
3047 FILE *config_file = NULL;
3048 struct stat st;
3049 struct strbuf copystr = STRBUF_INIT;
3050 struct config_store_data store;
3051
3052 memset(&store, 0, sizeof(store));
3053
3054 if (new_name && !section_name_is_ok(new_name)) {
3055 ret = error(_("invalid section name: %s"), new_name);
3056 goto out_no_rollback;
3057 }
3058
3059 if (!config_filename)
3060 config_filename = filename_buf = git_pathdup("config");
3061
3062 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
3063 if (out_fd < 0) {
3064 ret = error(_("could not lock config file %s"), config_filename);
3065 goto out;
3066 }
3067
3068 if (!(config_file = fopen(config_filename, "rb"))) {
3069 ret = warn_on_fopen_errors(config_filename);
3070 if (ret)
3071 goto out;
3072 /* no config file means nothing to rename, no error */
3073 goto commit_and_out;
3074 }
3075
3076 if (fstat(fileno(config_file), &st) == -1) {
3077 ret = error_errno(_("fstat on %s failed"), config_filename);
3078 goto out;
3079 }
3080
3081 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3082 ret = error_errno(_("chmod on %s failed"),
3083 get_lock_file_path(&lock));
3084 goto out;
3085 }
3086
3087 while (fgets(buf, sizeof(buf), config_file)) {
3088 int i;
3089 int length;
3090 int is_section = 0;
3091 char *output = buf;
3092 for (i = 0; buf[i] && isspace(buf[i]); i++)
3093 ; /* do nothing */
3094 if (buf[i] == '[') {
3095 /* it's a section */
3096 int offset;
3097 is_section = 1;
3098
3099 /*
3100 * When encountering a new section under -c we
3101 * need to flush out any section we're already
3102 * coping and begin anew. There might be
3103 * multiple [branch "$name"] sections.
3104 */
3105 if (copystr.len > 0) {
3106 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3107 ret = write_error(get_lock_file_path(&lock));
3108 goto out;
3109 }
3110 strbuf_reset(&copystr);
3111 }
3112
3113 offset = section_name_match(&buf[i], old_name);
3114 if (offset > 0) {
3115 ret++;
3116 if (new_name == NULL) {
3117 remove = 1;
3118 continue;
3119 }
3120 store.baselen = strlen(new_name);
3121 if (!copy) {
3122 if (write_section(out_fd, new_name, &store) < 0) {
3123 ret = write_error(get_lock_file_path(&lock));
3124 goto out;
3125 }
3126 /*
3127 * We wrote out the new section, with
3128 * a newline, now skip the old
3129 * section's length
3130 */
3131 output += offset + i;
3132 if (strlen(output) > 0) {
3133 /*
3134 * More content means there's
3135 * a declaration to put on the
3136 * next line; indent with a
3137 * tab
3138 */
3139 output -= 1;
3140 output[0] = '\t';
3141 }
3142 } else {
3143 copystr = store_create_section(new_name, &store);
3144 }
3145 }
3146 remove = 0;
3147 }
3148 if (remove)
3149 continue;
3150 length = strlen(output);
3151
3152 if (!is_section && copystr.len > 0) {
3153 strbuf_add(&copystr, output, length);
3154 }
3155
3156 if (write_in_full(out_fd, output, length) < 0) {
3157 ret = write_error(get_lock_file_path(&lock));
3158 goto out;
3159 }
3160 }
3161
3162 /*
3163 * Copy a trailing section at the end of the config, won't be
3164 * flushed by the usual "flush because we have a new section
3165 * logic in the loop above.
3166 */
3167 if (copystr.len > 0) {
3168 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3169 ret = write_error(get_lock_file_path(&lock));
3170 goto out;
3171 }
3172 strbuf_reset(&copystr);
3173 }
3174
3175 fclose(config_file);
3176 config_file = NULL;
3177 commit_and_out:
3178 if (commit_lock_file(&lock) < 0)
3179 ret = error_errno(_("could not write config file %s"),
3180 config_filename);
3181 out:
3182 if (config_file)
3183 fclose(config_file);
3184 rollback_lock_file(&lock);
3185 out_no_rollback:
3186 free(filename_buf);
3187 config_store_data_clear(&store);
3188 return ret;
3189 }
3190
3191 int git_config_rename_section_in_file(const char *config_filename,
3192 const char *old_name, const char *new_name)
3193 {
3194 return git_config_copy_or_rename_section_in_file(config_filename,
3195 old_name, new_name, 0);
3196 }
3197
3198 int git_config_rename_section(const char *old_name, const char *new_name)
3199 {
3200 return git_config_rename_section_in_file(NULL, old_name, new_name);
3201 }
3202
3203 int git_config_copy_section_in_file(const char *config_filename,
3204 const char *old_name, const char *new_name)
3205 {
3206 return git_config_copy_or_rename_section_in_file(config_filename,
3207 old_name, new_name, 1);
3208 }
3209
3210 int git_config_copy_section(const char *old_name, const char *new_name)
3211 {
3212 return git_config_copy_section_in_file(NULL, old_name, new_name);
3213 }
3214
3215 /*
3216 * Call this to report error for your variable that should not
3217 * get a boolean value (i.e. "[my] var" means "true").
3218 */
3219 #undef config_error_nonbool
3220 int config_error_nonbool(const char *var)
3221 {
3222 return error(_("missing value for '%s'"), var);
3223 }
3224
3225 int parse_config_key(const char *var,
3226 const char *section,
3227 const char **subsection, int *subsection_len,
3228 const char **key)
3229 {
3230 const char *dot;
3231
3232 /* Does it start with "section." ? */
3233 if (!skip_prefix(var, section, &var) || *var != '.')
3234 return -1;
3235
3236 /*
3237 * Find the key; we don't know yet if we have a subsection, but we must
3238 * parse backwards from the end, since the subsection may have dots in
3239 * it, too.
3240 */
3241 dot = strrchr(var, '.');
3242 *key = dot + 1;
3243
3244 /* Did we have a subsection at all? */
3245 if (dot == var) {
3246 if (subsection) {
3247 *subsection = NULL;
3248 *subsection_len = 0;
3249 }
3250 }
3251 else {
3252 if (!subsection)
3253 return -1;
3254 *subsection = var + 1;
3255 *subsection_len = dot - *subsection;
3256 }
3257
3258 return 0;
3259 }
3260
3261 const char *current_config_origin_type(void)
3262 {
3263 int type;
3264 if (current_config_kvi)
3265 type = current_config_kvi->origin_type;
3266 else if(cf)
3267 type = cf->origin_type;
3268 else
3269 BUG("current_config_origin_type called outside config callback");
3270
3271 switch (type) {
3272 case CONFIG_ORIGIN_BLOB:
3273 return "blob";
3274 case CONFIG_ORIGIN_FILE:
3275 return "file";
3276 case CONFIG_ORIGIN_STDIN:
3277 return "standard input";
3278 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3279 return "submodule-blob";
3280 case CONFIG_ORIGIN_CMDLINE:
3281 return "command line";
3282 default:
3283 BUG("unknown config origin type");
3284 }
3285 }
3286
3287 const char *current_config_name(void)
3288 {
3289 const char *name;
3290 if (current_config_kvi)
3291 name = current_config_kvi->filename;
3292 else if (cf)
3293 name = cf->name;
3294 else
3295 BUG("current_config_name called outside config callback");
3296 return name ? name : "";
3297 }
3298
3299 enum config_scope current_config_scope(void)
3300 {
3301 if (current_config_kvi)
3302 return current_config_kvi->scope;
3303 else
3304 return current_parsing_scope;
3305 }
3306
3307 int lookup_config(const char **mapping, int nr_mapping, const char *var)
3308 {
3309 int i;
3310
3311 for (i = 0; i < nr_mapping; i++) {
3312 const char *name = mapping[i];
3313
3314 if (name && !strcasecmp(var, name))
3315 return i;
3316 }
3317 return -1;
3318 }