config.c: refactor die_bad_number() to not call gettext() early
[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) ?
953 N_("out of range") : N_("invalid unit");
954 const char *bad_numeric = N_("bad numeric config value '%s' for '%s': %s");
955
956 if (!value)
957 value = "";
958
959 if (!(cf && cf->name))
960 die(_(bad_numeric), value, name, _(error_type));
961
962 switch (cf->origin_type) {
963 case CONFIG_ORIGIN_BLOB:
964 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
965 value, name, cf->name, _(error_type));
966 case CONFIG_ORIGIN_FILE:
967 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
968 value, name, cf->name, _(error_type));
969 case CONFIG_ORIGIN_STDIN:
970 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
971 value, name, _(error_type));
972 case CONFIG_ORIGIN_SUBMODULE_BLOB:
973 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
974 value, name, cf->name, _(error_type));
975 case CONFIG_ORIGIN_CMDLINE:
976 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
977 value, name, cf->name, _(error_type));
978 default:
979 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
980 value, name, cf->name, _(error_type));
981 }
982 }
983
984 int git_config_int(const char *name, const char *value)
985 {
986 int ret;
987 if (!git_parse_int(value, &ret))
988 die_bad_number(name, value);
989 return ret;
990 }
991
992 int64_t git_config_int64(const char *name, const char *value)
993 {
994 int64_t ret;
995 if (!git_parse_int64(value, &ret))
996 die_bad_number(name, value);
997 return ret;
998 }
999
1000 unsigned long git_config_ulong(const char *name, const char *value)
1001 {
1002 unsigned long ret;
1003 if (!git_parse_ulong(value, &ret))
1004 die_bad_number(name, value);
1005 return ret;
1006 }
1007
1008 ssize_t git_config_ssize_t(const char *name, const char *value)
1009 {
1010 ssize_t ret;
1011 if (!git_parse_ssize_t(value, &ret))
1012 die_bad_number(name, value);
1013 return ret;
1014 }
1015
1016 static int git_parse_maybe_bool_text(const char *value)
1017 {
1018 if (!value)
1019 return 1;
1020 if (!*value)
1021 return 0;
1022 if (!strcasecmp(value, "true")
1023 || !strcasecmp(value, "yes")
1024 || !strcasecmp(value, "on"))
1025 return 1;
1026 if (!strcasecmp(value, "false")
1027 || !strcasecmp(value, "no")
1028 || !strcasecmp(value, "off"))
1029 return 0;
1030 return -1;
1031 }
1032
1033 int git_parse_maybe_bool(const char *value)
1034 {
1035 int v = git_parse_maybe_bool_text(value);
1036 if (0 <= v)
1037 return v;
1038 if (git_parse_int(value, &v))
1039 return !!v;
1040 return -1;
1041 }
1042
1043 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
1044 {
1045 int v = git_parse_maybe_bool_text(value);
1046 if (0 <= v) {
1047 *is_bool = 1;
1048 return v;
1049 }
1050 *is_bool = 0;
1051 return git_config_int(name, value);
1052 }
1053
1054 int git_config_bool(const char *name, const char *value)
1055 {
1056 int discard;
1057 return !!git_config_bool_or_int(name, value, &discard);
1058 }
1059
1060 int git_config_string(const char **dest, const char *var, const char *value)
1061 {
1062 if (!value)
1063 return config_error_nonbool(var);
1064 *dest = xstrdup(value);
1065 return 0;
1066 }
1067
1068 int git_config_pathname(const char **dest, const char *var, const char *value)
1069 {
1070 if (!value)
1071 return config_error_nonbool(var);
1072 *dest = expand_user_path(value, 0);
1073 if (!*dest)
1074 die(_("failed to expand user dir in: '%s'"), value);
1075 return 0;
1076 }
1077
1078 int git_config_expiry_date(timestamp_t *timestamp, const char *var, const char *value)
1079 {
1080 if (!value)
1081 return config_error_nonbool(var);
1082 if (parse_expiry_date(value, timestamp))
1083 return error(_("'%s' for '%s' is not a valid timestamp"),
1084 value, var);
1085 return 0;
1086 }
1087
1088 int git_config_color(char *dest, const char *var, const char *value)
1089 {
1090 if (!value)
1091 return config_error_nonbool(var);
1092 if (color_parse(value, dest) < 0)
1093 return -1;
1094 return 0;
1095 }
1096
1097 static int git_default_core_config(const char *var, const char *value, void *cb)
1098 {
1099 /* This needs a better name */
1100 if (!strcmp(var, "core.filemode")) {
1101 trust_executable_bit = git_config_bool(var, value);
1102 return 0;
1103 }
1104 if (!strcmp(var, "core.trustctime")) {
1105 trust_ctime = git_config_bool(var, value);
1106 return 0;
1107 }
1108 if (!strcmp(var, "core.checkstat")) {
1109 if (!strcasecmp(value, "default"))
1110 check_stat = 1;
1111 else if (!strcasecmp(value, "minimal"))
1112 check_stat = 0;
1113 }
1114
1115 if (!strcmp(var, "core.quotepath")) {
1116 quote_path_fully = git_config_bool(var, value);
1117 return 0;
1118 }
1119
1120 if (!strcmp(var, "core.symlinks")) {
1121 has_symlinks = git_config_bool(var, value);
1122 return 0;
1123 }
1124
1125 if (!strcmp(var, "core.ignorecase")) {
1126 ignore_case = git_config_bool(var, value);
1127 return 0;
1128 }
1129
1130 if (!strcmp(var, "core.attributesfile"))
1131 return git_config_pathname(&git_attributes_file, var, value);
1132
1133 if (!strcmp(var, "core.hookspath"))
1134 return git_config_pathname(&git_hooks_path, var, value);
1135
1136 if (!strcmp(var, "core.bare")) {
1137 is_bare_repository_cfg = git_config_bool(var, value);
1138 return 0;
1139 }
1140
1141 if (!strcmp(var, "core.ignorestat")) {
1142 assume_unchanged = git_config_bool(var, value);
1143 return 0;
1144 }
1145
1146 if (!strcmp(var, "core.prefersymlinkrefs")) {
1147 prefer_symlink_refs = git_config_bool(var, value);
1148 return 0;
1149 }
1150
1151 if (!strcmp(var, "core.logallrefupdates")) {
1152 if (value && !strcasecmp(value, "always"))
1153 log_all_ref_updates = LOG_REFS_ALWAYS;
1154 else if (git_config_bool(var, value))
1155 log_all_ref_updates = LOG_REFS_NORMAL;
1156 else
1157 log_all_ref_updates = LOG_REFS_NONE;
1158 return 0;
1159 }
1160
1161 if (!strcmp(var, "core.warnambiguousrefs")) {
1162 warn_ambiguous_refs = git_config_bool(var, value);
1163 return 0;
1164 }
1165
1166 if (!strcmp(var, "core.abbrev")) {
1167 if (!value)
1168 return config_error_nonbool(var);
1169 if (!strcasecmp(value, "auto"))
1170 default_abbrev = -1;
1171 else {
1172 int abbrev = git_config_int(var, value);
1173 if (abbrev < minimum_abbrev || abbrev > 40)
1174 return error(_("abbrev length out of range: %d"), abbrev);
1175 default_abbrev = abbrev;
1176 }
1177 return 0;
1178 }
1179
1180 if (!strcmp(var, "core.disambiguate"))
1181 return set_disambiguate_hint_config(var, value);
1182
1183 if (!strcmp(var, "core.loosecompression")) {
1184 int level = git_config_int(var, value);
1185 if (level == -1)
1186 level = Z_DEFAULT_COMPRESSION;
1187 else if (level < 0 || level > Z_BEST_COMPRESSION)
1188 die(_("bad zlib compression level %d"), level);
1189 zlib_compression_level = level;
1190 zlib_compression_seen = 1;
1191 return 0;
1192 }
1193
1194 if (!strcmp(var, "core.compression")) {
1195 int level = git_config_int(var, value);
1196 if (level == -1)
1197 level = Z_DEFAULT_COMPRESSION;
1198 else if (level < 0 || level > Z_BEST_COMPRESSION)
1199 die(_("bad zlib compression level %d"), level);
1200 core_compression_level = level;
1201 core_compression_seen = 1;
1202 if (!zlib_compression_seen)
1203 zlib_compression_level = level;
1204 if (!pack_compression_seen)
1205 pack_compression_level = level;
1206 return 0;
1207 }
1208
1209 if (!strcmp(var, "core.packedgitwindowsize")) {
1210 int pgsz_x2 = getpagesize() * 2;
1211 packed_git_window_size = git_config_ulong(var, value);
1212
1213 /* This value must be multiple of (pagesize * 2) */
1214 packed_git_window_size /= pgsz_x2;
1215 if (packed_git_window_size < 1)
1216 packed_git_window_size = 1;
1217 packed_git_window_size *= pgsz_x2;
1218 return 0;
1219 }
1220
1221 if (!strcmp(var, "core.bigfilethreshold")) {
1222 big_file_threshold = git_config_ulong(var, value);
1223 return 0;
1224 }
1225
1226 if (!strcmp(var, "core.packedgitlimit")) {
1227 packed_git_limit = git_config_ulong(var, value);
1228 return 0;
1229 }
1230
1231 if (!strcmp(var, "core.deltabasecachelimit")) {
1232 delta_base_cache_limit = git_config_ulong(var, value);
1233 return 0;
1234 }
1235
1236 if (!strcmp(var, "core.autocrlf")) {
1237 if (value && !strcasecmp(value, "input")) {
1238 auto_crlf = AUTO_CRLF_INPUT;
1239 return 0;
1240 }
1241 auto_crlf = git_config_bool(var, value);
1242 return 0;
1243 }
1244
1245 if (!strcmp(var, "core.safecrlf")) {
1246 int eol_rndtrp_die;
1247 if (value && !strcasecmp(value, "warn")) {
1248 global_conv_flags_eol = CONV_EOL_RNDTRP_WARN;
1249 return 0;
1250 }
1251 eol_rndtrp_die = git_config_bool(var, value);
1252 global_conv_flags_eol = eol_rndtrp_die ?
1253 CONV_EOL_RNDTRP_DIE : 0;
1254 return 0;
1255 }
1256
1257 if (!strcmp(var, "core.eol")) {
1258 if (value && !strcasecmp(value, "lf"))
1259 core_eol = EOL_LF;
1260 else if (value && !strcasecmp(value, "crlf"))
1261 core_eol = EOL_CRLF;
1262 else if (value && !strcasecmp(value, "native"))
1263 core_eol = EOL_NATIVE;
1264 else
1265 core_eol = EOL_UNSET;
1266 return 0;
1267 }
1268
1269 if (!strcmp(var, "core.checkroundtripencoding")) {
1270 check_roundtrip_encoding = xstrdup(value);
1271 return 0;
1272 }
1273
1274 if (!strcmp(var, "core.notesref")) {
1275 notes_ref_name = xstrdup(value);
1276 return 0;
1277 }
1278
1279 if (!strcmp(var, "core.editor"))
1280 return git_config_string(&editor_program, var, value);
1281
1282 if (!strcmp(var, "core.commentchar")) {
1283 if (!value)
1284 return config_error_nonbool(var);
1285 else if (!strcasecmp(value, "auto"))
1286 auto_comment_line_char = 1;
1287 else if (value[0] && !value[1]) {
1288 comment_line_char = value[0];
1289 auto_comment_line_char = 0;
1290 } else
1291 return error(_("core.commentChar should only be one character"));
1292 return 0;
1293 }
1294
1295 if (!strcmp(var, "core.askpass"))
1296 return git_config_string(&askpass_program, var, value);
1297
1298 if (!strcmp(var, "core.excludesfile"))
1299 return git_config_pathname(&excludes_file, var, value);
1300
1301 if (!strcmp(var, "core.whitespace")) {
1302 if (!value)
1303 return config_error_nonbool(var);
1304 whitespace_rule_cfg = parse_whitespace_rule(value);
1305 return 0;
1306 }
1307
1308 if (!strcmp(var, "core.fsyncobjectfiles")) {
1309 fsync_object_files = git_config_bool(var, value);
1310 return 0;
1311 }
1312
1313 if (!strcmp(var, "core.preloadindex")) {
1314 core_preload_index = git_config_bool(var, value);
1315 return 0;
1316 }
1317
1318 if (!strcmp(var, "core.createobject")) {
1319 if (!strcmp(value, "rename"))
1320 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1321 else if (!strcmp(value, "link"))
1322 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1323 else
1324 die(_("invalid mode for object creation: %s"), value);
1325 return 0;
1326 }
1327
1328 if (!strcmp(var, "core.sparsecheckout")) {
1329 core_apply_sparse_checkout = git_config_bool(var, value);
1330 return 0;
1331 }
1332
1333 if (!strcmp(var, "core.precomposeunicode")) {
1334 precomposed_unicode = git_config_bool(var, value);
1335 return 0;
1336 }
1337
1338 if (!strcmp(var, "core.protecthfs")) {
1339 protect_hfs = git_config_bool(var, value);
1340 return 0;
1341 }
1342
1343 if (!strcmp(var, "core.protectntfs")) {
1344 protect_ntfs = git_config_bool(var, value);
1345 return 0;
1346 }
1347
1348 if (!strcmp(var, "core.partialclonefilter")) {
1349 return git_config_string(&core_partial_clone_filter_default,
1350 var, value);
1351 }
1352
1353 if (!strcmp(var, "core.usereplacerefs")) {
1354 read_replace_refs = git_config_bool(var, value);
1355 return 0;
1356 }
1357
1358 /* Add other config variables here and to Documentation/config.txt. */
1359 return platform_core_config(var, value, cb);
1360 }
1361
1362 static int git_default_i18n_config(const char *var, const char *value)
1363 {
1364 if (!strcmp(var, "i18n.commitencoding"))
1365 return git_config_string(&git_commit_encoding, var, value);
1366
1367 if (!strcmp(var, "i18n.logoutputencoding"))
1368 return git_config_string(&git_log_output_encoding, var, value);
1369
1370 /* Add other config variables here and to Documentation/config.txt. */
1371 return 0;
1372 }
1373
1374 static int git_default_branch_config(const char *var, const char *value)
1375 {
1376 if (!strcmp(var, "branch.autosetupmerge")) {
1377 if (value && !strcasecmp(value, "always")) {
1378 git_branch_track = BRANCH_TRACK_ALWAYS;
1379 return 0;
1380 }
1381 git_branch_track = git_config_bool(var, value);
1382 return 0;
1383 }
1384 if (!strcmp(var, "branch.autosetuprebase")) {
1385 if (!value)
1386 return config_error_nonbool(var);
1387 else if (!strcmp(value, "never"))
1388 autorebase = AUTOREBASE_NEVER;
1389 else if (!strcmp(value, "local"))
1390 autorebase = AUTOREBASE_LOCAL;
1391 else if (!strcmp(value, "remote"))
1392 autorebase = AUTOREBASE_REMOTE;
1393 else if (!strcmp(value, "always"))
1394 autorebase = AUTOREBASE_ALWAYS;
1395 else
1396 return error(_("malformed value for %s"), var);
1397 return 0;
1398 }
1399
1400 /* Add other config variables here and to Documentation/config.txt. */
1401 return 0;
1402 }
1403
1404 static int git_default_push_config(const char *var, const char *value)
1405 {
1406 if (!strcmp(var, "push.default")) {
1407 if (!value)
1408 return config_error_nonbool(var);
1409 else if (!strcmp(value, "nothing"))
1410 push_default = PUSH_DEFAULT_NOTHING;
1411 else if (!strcmp(value, "matching"))
1412 push_default = PUSH_DEFAULT_MATCHING;
1413 else if (!strcmp(value, "simple"))
1414 push_default = PUSH_DEFAULT_SIMPLE;
1415 else if (!strcmp(value, "upstream"))
1416 push_default = PUSH_DEFAULT_UPSTREAM;
1417 else if (!strcmp(value, "tracking")) /* deprecated */
1418 push_default = PUSH_DEFAULT_UPSTREAM;
1419 else if (!strcmp(value, "current"))
1420 push_default = PUSH_DEFAULT_CURRENT;
1421 else {
1422 error(_("malformed value for %s: %s"), var, value);
1423 return error(_("must be one of nothing, matching, simple, "
1424 "upstream or current"));
1425 }
1426 return 0;
1427 }
1428
1429 /* Add other config variables here and to Documentation/config.txt. */
1430 return 0;
1431 }
1432
1433 static int git_default_mailmap_config(const char *var, const char *value)
1434 {
1435 if (!strcmp(var, "mailmap.file"))
1436 return git_config_pathname(&git_mailmap_file, var, value);
1437 if (!strcmp(var, "mailmap.blob"))
1438 return git_config_string(&git_mailmap_blob, var, value);
1439
1440 /* Add other config variables here and to Documentation/config.txt. */
1441 return 0;
1442 }
1443
1444 int git_default_config(const char *var, const char *value, void *cb)
1445 {
1446 if (starts_with(var, "core."))
1447 return git_default_core_config(var, value, cb);
1448
1449 if (starts_with(var, "user.") ||
1450 starts_with(var, "author.") ||
1451 starts_with(var, "committer."))
1452 return git_ident_config(var, value, cb);
1453
1454 if (starts_with(var, "i18n."))
1455 return git_default_i18n_config(var, value);
1456
1457 if (starts_with(var, "branch."))
1458 return git_default_branch_config(var, value);
1459
1460 if (starts_with(var, "push."))
1461 return git_default_push_config(var, value);
1462
1463 if (starts_with(var, "mailmap."))
1464 return git_default_mailmap_config(var, value);
1465
1466 if (starts_with(var, "advice.") || starts_with(var, "color.advice"))
1467 return git_default_advice_config(var, value);
1468
1469 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1470 pager_use_color = git_config_bool(var,value);
1471 return 0;
1472 }
1473
1474 if (!strcmp(var, "pack.packsizelimit")) {
1475 pack_size_limit_cfg = git_config_ulong(var, value);
1476 return 0;
1477 }
1478
1479 if (!strcmp(var, "pack.compression")) {
1480 int level = git_config_int(var, value);
1481 if (level == -1)
1482 level = Z_DEFAULT_COMPRESSION;
1483 else if (level < 0 || level > Z_BEST_COMPRESSION)
1484 die(_("bad pack compression level %d"), level);
1485 pack_compression_level = level;
1486 pack_compression_seen = 1;
1487 return 0;
1488 }
1489
1490 /* Add other config variables here and to Documentation/config.txt. */
1491 return 0;
1492 }
1493
1494 /*
1495 * All source specific fields in the union, die_on_error, name and the callbacks
1496 * fgetc, ungetc, ftell of top need to be initialized before calling
1497 * this function.
1498 */
1499 static int do_config_from(struct config_source *top, config_fn_t fn, void *data,
1500 const struct config_options *opts)
1501 {
1502 int ret;
1503
1504 /* push config-file parsing state stack */
1505 top->prev = cf;
1506 top->linenr = 1;
1507 top->eof = 0;
1508 strbuf_init(&top->value, 1024);
1509 strbuf_init(&top->var, 1024);
1510 cf = top;
1511
1512 ret = git_parse_source(fn, data, opts);
1513
1514 /* pop config-file parsing state stack */
1515 strbuf_release(&top->value);
1516 strbuf_release(&top->var);
1517 cf = top->prev;
1518
1519 return ret;
1520 }
1521
1522 static int do_config_from_file(config_fn_t fn,
1523 const enum config_origin_type origin_type,
1524 const char *name, const char *path, FILE *f,
1525 void *data, const struct config_options *opts)
1526 {
1527 struct config_source top;
1528 int ret;
1529
1530 top.u.file = f;
1531 top.origin_type = origin_type;
1532 top.name = name;
1533 top.path = path;
1534 top.default_error_action = CONFIG_ERROR_DIE;
1535 top.do_fgetc = config_file_fgetc;
1536 top.do_ungetc = config_file_ungetc;
1537 top.do_ftell = config_file_ftell;
1538
1539 flockfile(f);
1540 ret = do_config_from(&top, fn, data, opts);
1541 funlockfile(f);
1542 return ret;
1543 }
1544
1545 static int git_config_from_stdin(config_fn_t fn, void *data)
1546 {
1547 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin,
1548 data, NULL);
1549 }
1550
1551 int git_config_from_file_with_options(config_fn_t fn, const char *filename,
1552 void *data,
1553 const struct config_options *opts)
1554 {
1555 int ret = -1;
1556 FILE *f;
1557
1558 f = fopen_or_warn(filename, "r");
1559 if (f) {
1560 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename,
1561 filename, f, data, opts);
1562 fclose(f);
1563 }
1564 return ret;
1565 }
1566
1567 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1568 {
1569 return git_config_from_file_with_options(fn, filename, data, NULL);
1570 }
1571
1572 int git_config_from_mem(config_fn_t fn,
1573 const enum config_origin_type origin_type,
1574 const char *name, const char *buf, size_t len,
1575 void *data, const struct config_options *opts)
1576 {
1577 struct config_source top;
1578
1579 top.u.buf.buf = buf;
1580 top.u.buf.len = len;
1581 top.u.buf.pos = 0;
1582 top.origin_type = origin_type;
1583 top.name = name;
1584 top.path = NULL;
1585 top.default_error_action = CONFIG_ERROR_ERROR;
1586 top.do_fgetc = config_buf_fgetc;
1587 top.do_ungetc = config_buf_ungetc;
1588 top.do_ftell = config_buf_ftell;
1589
1590 return do_config_from(&top, fn, data, opts);
1591 }
1592
1593 int git_config_from_blob_oid(config_fn_t fn,
1594 const char *name,
1595 const struct object_id *oid,
1596 void *data)
1597 {
1598 enum object_type type;
1599 char *buf;
1600 unsigned long size;
1601 int ret;
1602
1603 buf = read_object_file(oid, &type, &size);
1604 if (!buf)
1605 return error(_("unable to load config blob object '%s'"), name);
1606 if (type != OBJ_BLOB) {
1607 free(buf);
1608 return error(_("reference '%s' does not point to a blob"), name);
1609 }
1610
1611 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size,
1612 data, NULL);
1613 free(buf);
1614
1615 return ret;
1616 }
1617
1618 static int git_config_from_blob_ref(config_fn_t fn,
1619 const char *name,
1620 void *data)
1621 {
1622 struct object_id oid;
1623
1624 if (get_oid(name, &oid) < 0)
1625 return error(_("unable to resolve config blob '%s'"), name);
1626 return git_config_from_blob_oid(fn, name, &oid, data);
1627 }
1628
1629 const char *git_etc_gitconfig(void)
1630 {
1631 static const char *system_wide;
1632 if (!system_wide)
1633 system_wide = system_path(ETC_GITCONFIG);
1634 return system_wide;
1635 }
1636
1637 /*
1638 * Parse environment variable 'k' as a boolean (in various
1639 * possible spellings); if missing, use the default value 'def'.
1640 */
1641 int git_env_bool(const char *k, int def)
1642 {
1643 const char *v = getenv(k);
1644 return v ? git_config_bool(k, v) : def;
1645 }
1646
1647 /*
1648 * Parse environment variable 'k' as ulong with possibly a unit
1649 * suffix; if missing, use the default value 'val'.
1650 */
1651 unsigned long git_env_ulong(const char *k, unsigned long val)
1652 {
1653 const char *v = getenv(k);
1654 if (v && !git_parse_ulong(v, &val))
1655 die(_("failed to parse %s"), k);
1656 return val;
1657 }
1658
1659 int git_config_system(void)
1660 {
1661 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1662 }
1663
1664 static int do_git_config_sequence(const struct config_options *opts,
1665 config_fn_t fn, void *data)
1666 {
1667 int ret = 0;
1668 char *xdg_config = xdg_config_home("config");
1669 char *user_config = expand_user_path("~/.gitconfig", 0);
1670 char *repo_config;
1671
1672 if (opts->commondir)
1673 repo_config = mkpathdup("%s/config", opts->commondir);
1674 else if (opts->git_dir)
1675 BUG("git_dir without commondir");
1676 else
1677 repo_config = NULL;
1678
1679 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1680 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK,
1681 opts->system_gently ?
1682 ACCESS_EACCES_OK : 0))
1683 ret += git_config_from_file(fn, git_etc_gitconfig(),
1684 data);
1685
1686 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1687 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1688 ret += git_config_from_file(fn, xdg_config, data);
1689
1690 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1691 ret += git_config_from_file(fn, user_config, data);
1692
1693 current_parsing_scope = CONFIG_SCOPE_REPO;
1694 if (!opts->ignore_repo && repo_config &&
1695 !access_or_die(repo_config, R_OK, 0))
1696 ret += git_config_from_file(fn, repo_config, data);
1697
1698 /*
1699 * Note: this should have a new scope, CONFIG_SCOPE_WORKTREE.
1700 * But let's not complicate things before it's actually needed.
1701 */
1702 if (!opts->ignore_worktree && repository_format_worktree_config) {
1703 char *path = git_pathdup("config.worktree");
1704 if (!access_or_die(path, R_OK, 0))
1705 ret += git_config_from_file(fn, path, data);
1706 free(path);
1707 }
1708
1709 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1710 if (!opts->ignore_cmdline && git_config_from_parameters(fn, data) < 0)
1711 die(_("unable to parse command-line config"));
1712
1713 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1714 free(xdg_config);
1715 free(user_config);
1716 free(repo_config);
1717 return ret;
1718 }
1719
1720 int config_with_options(config_fn_t fn, void *data,
1721 struct git_config_source *config_source,
1722 const struct config_options *opts)
1723 {
1724 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1725
1726 if (opts->respect_includes) {
1727 inc.fn = fn;
1728 inc.data = data;
1729 inc.opts = opts;
1730 fn = git_config_include;
1731 data = &inc;
1732 }
1733
1734 /*
1735 * If we have a specific filename, use it. Otherwise, follow the
1736 * regular lookup sequence.
1737 */
1738 if (config_source && config_source->use_stdin)
1739 return git_config_from_stdin(fn, data);
1740 else if (config_source && config_source->file)
1741 return git_config_from_file(fn, config_source->file, data);
1742 else if (config_source && config_source->blob)
1743 return git_config_from_blob_ref(fn, config_source->blob, data);
1744
1745 return do_git_config_sequence(opts, fn, data);
1746 }
1747
1748 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1749 {
1750 int i, value_index;
1751 struct string_list *values;
1752 struct config_set_element *entry;
1753 struct configset_list *list = &cs->list;
1754
1755 for (i = 0; i < list->nr; i++) {
1756 entry = list->items[i].e;
1757 value_index = list->items[i].value_index;
1758 values = &entry->value_list;
1759
1760 current_config_kvi = values->items[value_index].util;
1761
1762 if (fn(entry->key, values->items[value_index].string, data) < 0)
1763 git_die_config_linenr(entry->key,
1764 current_config_kvi->filename,
1765 current_config_kvi->linenr);
1766
1767 current_config_kvi = NULL;
1768 }
1769 }
1770
1771 void read_early_config(config_fn_t cb, void *data)
1772 {
1773 struct config_options opts = {0};
1774 struct strbuf commondir = STRBUF_INIT;
1775 struct strbuf gitdir = STRBUF_INIT;
1776
1777 opts.respect_includes = 1;
1778
1779 if (have_git_dir()) {
1780 opts.commondir = get_git_common_dir();
1781 opts.git_dir = get_git_dir();
1782 /*
1783 * When setup_git_directory() was not yet asked to discover the
1784 * GIT_DIR, we ask discover_git_directory() to figure out whether there
1785 * is any repository config we should use (but unlike
1786 * setup_git_directory_gently(), no global state is changed, most
1787 * notably, the current working directory is still the same after the
1788 * call).
1789 */
1790 } else if (!discover_git_directory(&commondir, &gitdir)) {
1791 opts.commondir = commondir.buf;
1792 opts.git_dir = gitdir.buf;
1793 }
1794
1795 config_with_options(cb, data, NULL, &opts);
1796
1797 strbuf_release(&commondir);
1798 strbuf_release(&gitdir);
1799 }
1800
1801 /*
1802 * Read config but only enumerate system and global settings.
1803 * Omit any repo-local, worktree-local, or command-line settings.
1804 */
1805 void read_very_early_config(config_fn_t cb, void *data)
1806 {
1807 struct config_options opts = { 0 };
1808
1809 opts.respect_includes = 1;
1810 opts.ignore_repo = 1;
1811 opts.ignore_worktree = 1;
1812 opts.ignore_cmdline = 1;
1813 opts.system_gently = 1;
1814
1815 config_with_options(cb, data, NULL, &opts);
1816 }
1817
1818 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1819 {
1820 struct config_set_element k;
1821 struct config_set_element *found_entry;
1822 char *normalized_key;
1823 /*
1824 * `key` may come from the user, so normalize it before using it
1825 * for querying entries from the hashmap.
1826 */
1827 if (git_config_parse_key(key, &normalized_key, NULL))
1828 return NULL;
1829
1830 hashmap_entry_init(&k, strhash(normalized_key));
1831 k.key = normalized_key;
1832 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1833 free(normalized_key);
1834 return found_entry;
1835 }
1836
1837 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1838 {
1839 struct config_set_element *e;
1840 struct string_list_item *si;
1841 struct configset_list_item *l_item;
1842 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1843
1844 e = configset_find_element(cs, key);
1845 /*
1846 * Since the keys are being fed by git_config*() callback mechanism, they
1847 * are already normalized. So simply add them without any further munging.
1848 */
1849 if (!e) {
1850 e = xmalloc(sizeof(*e));
1851 hashmap_entry_init(e, strhash(key));
1852 e->key = xstrdup(key);
1853 string_list_init(&e->value_list, 1);
1854 hashmap_add(&cs->config_hash, e);
1855 }
1856 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1857
1858 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1859 l_item = &cs->list.items[cs->list.nr++];
1860 l_item->e = e;
1861 l_item->value_index = e->value_list.nr - 1;
1862
1863 if (!cf)
1864 BUG("configset_add_value has no source");
1865 if (cf->name) {
1866 kv_info->filename = strintern(cf->name);
1867 kv_info->linenr = cf->linenr;
1868 kv_info->origin_type = cf->origin_type;
1869 } else {
1870 /* for values read from `git_config_from_parameters()` */
1871 kv_info->filename = NULL;
1872 kv_info->linenr = -1;
1873 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1874 }
1875 kv_info->scope = current_parsing_scope;
1876 si->util = kv_info;
1877
1878 return 0;
1879 }
1880
1881 static int config_set_element_cmp(const void *unused_cmp_data,
1882 const void *entry,
1883 const void *entry_or_key,
1884 const void *unused_keydata)
1885 {
1886 const struct config_set_element *e1 = entry;
1887 const struct config_set_element *e2 = entry_or_key;
1888
1889 return strcmp(e1->key, e2->key);
1890 }
1891
1892 void git_configset_init(struct config_set *cs)
1893 {
1894 hashmap_init(&cs->config_hash, config_set_element_cmp, NULL, 0);
1895 cs->hash_initialized = 1;
1896 cs->list.nr = 0;
1897 cs->list.alloc = 0;
1898 cs->list.items = NULL;
1899 }
1900
1901 void git_configset_clear(struct config_set *cs)
1902 {
1903 struct config_set_element *entry;
1904 struct hashmap_iter iter;
1905 if (!cs->hash_initialized)
1906 return;
1907
1908 hashmap_iter_init(&cs->config_hash, &iter);
1909 while ((entry = hashmap_iter_next(&iter))) {
1910 free(entry->key);
1911 string_list_clear(&entry->value_list, 1);
1912 }
1913 hashmap_free(&cs->config_hash, 1);
1914 cs->hash_initialized = 0;
1915 free(cs->list.items);
1916 cs->list.nr = 0;
1917 cs->list.alloc = 0;
1918 cs->list.items = NULL;
1919 }
1920
1921 static int config_set_callback(const char *key, const char *value, void *cb)
1922 {
1923 struct config_set *cs = cb;
1924 configset_add_value(cs, key, value);
1925 return 0;
1926 }
1927
1928 int git_configset_add_file(struct config_set *cs, const char *filename)
1929 {
1930 return git_config_from_file(config_set_callback, filename, cs);
1931 }
1932
1933 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1934 {
1935 const struct string_list *values = NULL;
1936 /*
1937 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1938 * queried key in the files of the configset, the value returned will be the last
1939 * value in the value list for that key.
1940 */
1941 values = git_configset_get_value_multi(cs, key);
1942
1943 if (!values)
1944 return 1;
1945 assert(values->nr > 0);
1946 *value = values->items[values->nr - 1].string;
1947 return 0;
1948 }
1949
1950 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1951 {
1952 struct config_set_element *e = configset_find_element(cs, key);
1953 return e ? &e->value_list : NULL;
1954 }
1955
1956 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1957 {
1958 const char *value;
1959 if (!git_configset_get_value(cs, key, &value))
1960 return git_config_string(dest, key, value);
1961 else
1962 return 1;
1963 }
1964
1965 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1966 {
1967 return git_configset_get_string_const(cs, key, (const char **)dest);
1968 }
1969
1970 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1971 {
1972 const char *value;
1973 if (!git_configset_get_value(cs, key, &value)) {
1974 *dest = git_config_int(key, value);
1975 return 0;
1976 } else
1977 return 1;
1978 }
1979
1980 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1981 {
1982 const char *value;
1983 if (!git_configset_get_value(cs, key, &value)) {
1984 *dest = git_config_ulong(key, value);
1985 return 0;
1986 } else
1987 return 1;
1988 }
1989
1990 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1991 {
1992 const char *value;
1993 if (!git_configset_get_value(cs, key, &value)) {
1994 *dest = git_config_bool(key, value);
1995 return 0;
1996 } else
1997 return 1;
1998 }
1999
2000 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
2001 int *is_bool, int *dest)
2002 {
2003 const char *value;
2004 if (!git_configset_get_value(cs, key, &value)) {
2005 *dest = git_config_bool_or_int(key, value, is_bool);
2006 return 0;
2007 } else
2008 return 1;
2009 }
2010
2011 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
2012 {
2013 const char *value;
2014 if (!git_configset_get_value(cs, key, &value)) {
2015 *dest = git_parse_maybe_bool(value);
2016 if (*dest == -1)
2017 return -1;
2018 return 0;
2019 } else
2020 return 1;
2021 }
2022
2023 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
2024 {
2025 const char *value;
2026 if (!git_configset_get_value(cs, key, &value))
2027 return git_config_pathname(dest, key, value);
2028 else
2029 return 1;
2030 }
2031
2032 /* Functions use to read configuration from a repository */
2033 static void repo_read_config(struct repository *repo)
2034 {
2035 struct config_options opts = { 0 };
2036
2037 opts.respect_includes = 1;
2038 opts.commondir = repo->commondir;
2039 opts.git_dir = repo->gitdir;
2040
2041 if (!repo->config)
2042 repo->config = xcalloc(1, sizeof(struct config_set));
2043 else
2044 git_configset_clear(repo->config);
2045
2046 git_configset_init(repo->config);
2047
2048 if (config_with_options(config_set_callback, repo->config, NULL, &opts) < 0)
2049 /*
2050 * config_with_options() normally returns only
2051 * zero, as most errors are fatal, and
2052 * non-fatal potential errors are guarded by "if"
2053 * statements that are entered only when no error is
2054 * possible.
2055 *
2056 * If we ever encounter a non-fatal error, it means
2057 * something went really wrong and we should stop
2058 * immediately.
2059 */
2060 die(_("unknown error occurred while reading the configuration files"));
2061 }
2062
2063 static void git_config_check_init(struct repository *repo)
2064 {
2065 if (repo->config && repo->config->hash_initialized)
2066 return;
2067 repo_read_config(repo);
2068 }
2069
2070 static void repo_config_clear(struct repository *repo)
2071 {
2072 if (!repo->config || !repo->config->hash_initialized)
2073 return;
2074 git_configset_clear(repo->config);
2075 }
2076
2077 void repo_config(struct repository *repo, config_fn_t fn, void *data)
2078 {
2079 git_config_check_init(repo);
2080 configset_iter(repo->config, fn, data);
2081 }
2082
2083 int repo_config_get_value(struct repository *repo,
2084 const char *key, const char **value)
2085 {
2086 git_config_check_init(repo);
2087 return git_configset_get_value(repo->config, key, value);
2088 }
2089
2090 const struct string_list *repo_config_get_value_multi(struct repository *repo,
2091 const char *key)
2092 {
2093 git_config_check_init(repo);
2094 return git_configset_get_value_multi(repo->config, key);
2095 }
2096
2097 int repo_config_get_string_const(struct repository *repo,
2098 const char *key, const char **dest)
2099 {
2100 int ret;
2101 git_config_check_init(repo);
2102 ret = git_configset_get_string_const(repo->config, key, dest);
2103 if (ret < 0)
2104 git_die_config(key, NULL);
2105 return ret;
2106 }
2107
2108 int repo_config_get_string(struct repository *repo,
2109 const char *key, char **dest)
2110 {
2111 git_config_check_init(repo);
2112 return repo_config_get_string_const(repo, key, (const char **)dest);
2113 }
2114
2115 int repo_config_get_int(struct repository *repo,
2116 const char *key, int *dest)
2117 {
2118 git_config_check_init(repo);
2119 return git_configset_get_int(repo->config, key, dest);
2120 }
2121
2122 int repo_config_get_ulong(struct repository *repo,
2123 const char *key, unsigned long *dest)
2124 {
2125 git_config_check_init(repo);
2126 return git_configset_get_ulong(repo->config, key, dest);
2127 }
2128
2129 int repo_config_get_bool(struct repository *repo,
2130 const char *key, int *dest)
2131 {
2132 git_config_check_init(repo);
2133 return git_configset_get_bool(repo->config, key, dest);
2134 }
2135
2136 int repo_config_get_bool_or_int(struct repository *repo,
2137 const char *key, int *is_bool, int *dest)
2138 {
2139 git_config_check_init(repo);
2140 return git_configset_get_bool_or_int(repo->config, key, is_bool, dest);
2141 }
2142
2143 int repo_config_get_maybe_bool(struct repository *repo,
2144 const char *key, int *dest)
2145 {
2146 git_config_check_init(repo);
2147 return git_configset_get_maybe_bool(repo->config, key, dest);
2148 }
2149
2150 int repo_config_get_pathname(struct repository *repo,
2151 const char *key, const char **dest)
2152 {
2153 int ret;
2154 git_config_check_init(repo);
2155 ret = git_configset_get_pathname(repo->config, key, dest);
2156 if (ret < 0)
2157 git_die_config(key, NULL);
2158 return ret;
2159 }
2160
2161 /* Functions used historically to read configuration from 'the_repository' */
2162 void git_config(config_fn_t fn, void *data)
2163 {
2164 repo_config(the_repository, fn, data);
2165 }
2166
2167 void git_config_clear(void)
2168 {
2169 repo_config_clear(the_repository);
2170 }
2171
2172 int git_config_get_value(const char *key, const char **value)
2173 {
2174 return repo_config_get_value(the_repository, key, value);
2175 }
2176
2177 const struct string_list *git_config_get_value_multi(const char *key)
2178 {
2179 return repo_config_get_value_multi(the_repository, key);
2180 }
2181
2182 int git_config_get_string_const(const char *key, const char **dest)
2183 {
2184 return repo_config_get_string_const(the_repository, key, dest);
2185 }
2186
2187 int git_config_get_string(const char *key, char **dest)
2188 {
2189 return repo_config_get_string(the_repository, key, dest);
2190 }
2191
2192 int git_config_get_int(const char *key, int *dest)
2193 {
2194 return repo_config_get_int(the_repository, key, dest);
2195 }
2196
2197 int git_config_get_ulong(const char *key, unsigned long *dest)
2198 {
2199 return repo_config_get_ulong(the_repository, key, dest);
2200 }
2201
2202 int git_config_get_bool(const char *key, int *dest)
2203 {
2204 return repo_config_get_bool(the_repository, key, dest);
2205 }
2206
2207 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
2208 {
2209 return repo_config_get_bool_or_int(the_repository, key, is_bool, dest);
2210 }
2211
2212 int git_config_get_maybe_bool(const char *key, int *dest)
2213 {
2214 return repo_config_get_maybe_bool(the_repository, key, dest);
2215 }
2216
2217 int git_config_get_pathname(const char *key, const char **dest)
2218 {
2219 return repo_config_get_pathname(the_repository, key, dest);
2220 }
2221
2222 int git_config_get_expiry(const char *key, const char **output)
2223 {
2224 int ret = git_config_get_string_const(key, output);
2225 if (ret)
2226 return ret;
2227 if (strcmp(*output, "now")) {
2228 timestamp_t now = approxidate("now");
2229 if (approxidate(*output) >= now)
2230 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
2231 }
2232 return ret;
2233 }
2234
2235 int git_config_get_expiry_in_days(const char *key, timestamp_t *expiry, timestamp_t now)
2236 {
2237 char *expiry_string;
2238 intmax_t days;
2239 timestamp_t when;
2240
2241 if (git_config_get_string(key, &expiry_string))
2242 return 1; /* no such thing */
2243
2244 if (git_parse_signed(expiry_string, &days, maximum_signed_value_of_type(int))) {
2245 const int scale = 86400;
2246 *expiry = now - days * scale;
2247 return 0;
2248 }
2249
2250 if (!parse_expiry_date(expiry_string, &when)) {
2251 *expiry = when;
2252 return 0;
2253 }
2254 return -1; /* thing exists but cannot be parsed */
2255 }
2256
2257 int git_config_get_untracked_cache(void)
2258 {
2259 int val = -1;
2260 const char *v;
2261
2262 /* Hack for test programs like test-dump-untracked-cache */
2263 if (ignore_untracked_cache_config)
2264 return -1;
2265
2266 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
2267 return val;
2268
2269 if (!git_config_get_value("core.untrackedcache", &v)) {
2270 if (!strcasecmp(v, "keep"))
2271 return -1;
2272
2273 error(_("unknown core.untrackedCache value '%s'; "
2274 "using 'keep' default value"), v);
2275 return -1;
2276 }
2277
2278 return -1; /* default value */
2279 }
2280
2281 int git_config_get_split_index(void)
2282 {
2283 int val;
2284
2285 if (!git_config_get_maybe_bool("core.splitindex", &val))
2286 return val;
2287
2288 return -1; /* default value */
2289 }
2290
2291 int git_config_get_max_percent_split_change(void)
2292 {
2293 int val = -1;
2294
2295 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2296 if (0 <= val && val <= 100)
2297 return val;
2298
2299 return error(_("splitIndex.maxPercentChange value '%d' "
2300 "should be between 0 and 100"), val);
2301 }
2302
2303 return -1; /* default value */
2304 }
2305
2306 int git_config_get_fsmonitor(void)
2307 {
2308 if (git_config_get_pathname("core.fsmonitor", &core_fsmonitor))
2309 core_fsmonitor = getenv("GIT_TEST_FSMONITOR");
2310
2311 if (core_fsmonitor && !*core_fsmonitor)
2312 core_fsmonitor = NULL;
2313
2314 if (core_fsmonitor)
2315 return 1;
2316
2317 return 0;
2318 }
2319
2320 int git_config_get_index_threads(int *dest)
2321 {
2322 int is_bool, val;
2323
2324 val = git_env_ulong("GIT_TEST_INDEX_THREADS", 0);
2325 if (val) {
2326 *dest = val;
2327 return 0;
2328 }
2329
2330 if (!git_config_get_bool_or_int("index.threads", &is_bool, &val)) {
2331 if (is_bool)
2332 *dest = val ? 0 : 1;
2333 else
2334 *dest = val;
2335 return 0;
2336 }
2337
2338 return 1;
2339 }
2340
2341 NORETURN
2342 void git_die_config_linenr(const char *key, const char *filename, int linenr)
2343 {
2344 if (!filename)
2345 die(_("unable to parse '%s' from command-line config"), key);
2346 else
2347 die(_("bad config variable '%s' in file '%s' at line %d"),
2348 key, filename, linenr);
2349 }
2350
2351 NORETURN __attribute__((format(printf, 2, 3)))
2352 void git_die_config(const char *key, const char *err, ...)
2353 {
2354 const struct string_list *values;
2355 struct key_value_info *kv_info;
2356
2357 if (err) {
2358 va_list params;
2359 va_start(params, err);
2360 vreportf("error: ", err, params);
2361 va_end(params);
2362 }
2363 values = git_config_get_value_multi(key);
2364 kv_info = values->items[values->nr - 1].util;
2365 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2366 }
2367
2368 /*
2369 * Find all the stuff for git_config_set() below.
2370 */
2371
2372 struct config_store_data {
2373 int baselen;
2374 char *key;
2375 int do_not_match;
2376 regex_t *value_regex;
2377 int multi_replace;
2378 struct {
2379 size_t begin, end;
2380 enum config_event_t type;
2381 int is_keys_section;
2382 } *parsed;
2383 unsigned int parsed_nr, parsed_alloc, *seen, seen_nr, seen_alloc;
2384 unsigned int key_seen:1, section_seen:1, is_keys_section:1;
2385 };
2386
2387 static void config_store_data_clear(struct config_store_data *store)
2388 {
2389 free(store->key);
2390 if (store->value_regex != NULL &&
2391 store->value_regex != CONFIG_REGEX_NONE) {
2392 regfree(store->value_regex);
2393 free(store->value_regex);
2394 }
2395 free(store->parsed);
2396 free(store->seen);
2397 memset(store, 0, sizeof(*store));
2398 }
2399
2400 static int matches(const char *key, const char *value,
2401 const struct config_store_data *store)
2402 {
2403 if (strcmp(key, store->key))
2404 return 0; /* not ours */
2405 if (!store->value_regex)
2406 return 1; /* always matches */
2407 if (store->value_regex == CONFIG_REGEX_NONE)
2408 return 0; /* never matches */
2409
2410 return store->do_not_match ^
2411 (value && !regexec(store->value_regex, value, 0, NULL, 0));
2412 }
2413
2414 static int store_aux_event(enum config_event_t type,
2415 size_t begin, size_t end, void *data)
2416 {
2417 struct config_store_data *store = data;
2418
2419 ALLOC_GROW(store->parsed, store->parsed_nr + 1, store->parsed_alloc);
2420 store->parsed[store->parsed_nr].begin = begin;
2421 store->parsed[store->parsed_nr].end = end;
2422 store->parsed[store->parsed_nr].type = type;
2423
2424 if (type == CONFIG_EVENT_SECTION) {
2425 int (*cmpfn)(const char *, const char *, size_t);
2426
2427 if (cf->var.len < 2 || cf->var.buf[cf->var.len - 1] != '.')
2428 return error(_("invalid section name '%s'"), cf->var.buf);
2429
2430 if (cf->subsection_case_sensitive)
2431 cmpfn = strncasecmp;
2432 else
2433 cmpfn = strncmp;
2434
2435 /* Is this the section we were looking for? */
2436 store->is_keys_section =
2437 store->parsed[store->parsed_nr].is_keys_section =
2438 cf->var.len - 1 == store->baselen &&
2439 !cmpfn(cf->var.buf, store->key, store->baselen);
2440 if (store->is_keys_section) {
2441 store->section_seen = 1;
2442 ALLOC_GROW(store->seen, store->seen_nr + 1,
2443 store->seen_alloc);
2444 store->seen[store->seen_nr] = store->parsed_nr;
2445 }
2446 }
2447
2448 store->parsed_nr++;
2449
2450 return 0;
2451 }
2452
2453 static int store_aux(const char *key, const char *value, void *cb)
2454 {
2455 struct config_store_data *store = cb;
2456
2457 if (store->key_seen) {
2458 if (matches(key, value, store)) {
2459 if (store->seen_nr == 1 && store->multi_replace == 0) {
2460 warning(_("%s has multiple values"), key);
2461 }
2462
2463 ALLOC_GROW(store->seen, store->seen_nr + 1,
2464 store->seen_alloc);
2465
2466 store->seen[store->seen_nr] = store->parsed_nr;
2467 store->seen_nr++;
2468 }
2469 } else if (store->is_keys_section) {
2470 /*
2471 * Do not increment matches yet: this may not be a match, but we
2472 * are in the desired section.
2473 */
2474 ALLOC_GROW(store->seen, store->seen_nr + 1, store->seen_alloc);
2475 store->seen[store->seen_nr] = store->parsed_nr;
2476 store->section_seen = 1;
2477
2478 if (matches(key, value, store)) {
2479 store->seen_nr++;
2480 store->key_seen = 1;
2481 }
2482 }
2483
2484 return 0;
2485 }
2486
2487 static int write_error(const char *filename)
2488 {
2489 error(_("failed to write new configuration file %s"), filename);
2490
2491 /* Same error code as "failed to rename". */
2492 return 4;
2493 }
2494
2495 static struct strbuf store_create_section(const char *key,
2496 const struct config_store_data *store)
2497 {
2498 const char *dot;
2499 int i;
2500 struct strbuf sb = STRBUF_INIT;
2501
2502 dot = memchr(key, '.', store->baselen);
2503 if (dot) {
2504 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2505 for (i = dot - key + 1; i < store->baselen; i++) {
2506 if (key[i] == '"' || key[i] == '\\')
2507 strbuf_addch(&sb, '\\');
2508 strbuf_addch(&sb, key[i]);
2509 }
2510 strbuf_addstr(&sb, "\"]\n");
2511 } else {
2512 strbuf_addf(&sb, "[%.*s]\n", store->baselen, key);
2513 }
2514
2515 return sb;
2516 }
2517
2518 static ssize_t write_section(int fd, const char *key,
2519 const struct config_store_data *store)
2520 {
2521 struct strbuf sb = store_create_section(key, store);
2522 ssize_t ret;
2523
2524 ret = write_in_full(fd, sb.buf, sb.len);
2525 strbuf_release(&sb);
2526
2527 return ret;
2528 }
2529
2530 static ssize_t write_pair(int fd, const char *key, const char *value,
2531 const struct config_store_data *store)
2532 {
2533 int i;
2534 ssize_t ret;
2535 int length = strlen(key + store->baselen + 1);
2536 const char *quote = "";
2537 struct strbuf sb = STRBUF_INIT;
2538
2539 /*
2540 * Check to see if the value needs to be surrounded with a dq pair.
2541 * Note that problematic characters are always backslash-quoted; this
2542 * check is about not losing leading or trailing SP and strings that
2543 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2544 * configuration parser.
2545 */
2546 if (value[0] == ' ')
2547 quote = "\"";
2548 for (i = 0; value[i]; i++)
2549 if (value[i] == ';' || value[i] == '#')
2550 quote = "\"";
2551 if (i && value[i - 1] == ' ')
2552 quote = "\"";
2553
2554 strbuf_addf(&sb, "\t%.*s = %s",
2555 length, key + store->baselen + 1, quote);
2556
2557 for (i = 0; value[i]; i++)
2558 switch (value[i]) {
2559 case '\n':
2560 strbuf_addstr(&sb, "\\n");
2561 break;
2562 case '\t':
2563 strbuf_addstr(&sb, "\\t");
2564 break;
2565 case '"':
2566 case '\\':
2567 strbuf_addch(&sb, '\\');
2568 /* fallthrough */
2569 default:
2570 strbuf_addch(&sb, value[i]);
2571 break;
2572 }
2573 strbuf_addf(&sb, "%s\n", quote);
2574
2575 ret = write_in_full(fd, sb.buf, sb.len);
2576 strbuf_release(&sb);
2577
2578 return ret;
2579 }
2580
2581 /*
2582 * If we are about to unset the last key(s) in a section, and if there are
2583 * no comments surrounding (or included in) the section, we will want to
2584 * extend begin/end to remove the entire section.
2585 *
2586 * Note: the parameter `seen_ptr` points to the index into the store.seen
2587 * array. * This index may be incremented if a section has more than one
2588 * entry (which all are to be removed).
2589 */
2590 static void maybe_remove_section(struct config_store_data *store,
2591 size_t *begin_offset, size_t *end_offset,
2592 int *seen_ptr)
2593 {
2594 size_t begin;
2595 int i, seen, section_seen = 0;
2596
2597 /*
2598 * First, ensure that this is the first key, and that there are no
2599 * comments before the entry nor before the section header.
2600 */
2601 seen = *seen_ptr;
2602 for (i = store->seen[seen]; i > 0; i--) {
2603 enum config_event_t type = store->parsed[i - 1].type;
2604
2605 if (type == CONFIG_EVENT_COMMENT)
2606 /* There is a comment before this entry or section */
2607 return;
2608 if (type == CONFIG_EVENT_ENTRY) {
2609 if (!section_seen)
2610 /* This is not the section's first entry. */
2611 return;
2612 /* We encountered no comment before the section. */
2613 break;
2614 }
2615 if (type == CONFIG_EVENT_SECTION) {
2616 if (!store->parsed[i - 1].is_keys_section)
2617 break;
2618 section_seen = 1;
2619 }
2620 }
2621 begin = store->parsed[i].begin;
2622
2623 /*
2624 * Next, make sure that we are removing he last key(s) in the section,
2625 * and that there are no comments that are possibly about the current
2626 * section.
2627 */
2628 for (i = store->seen[seen] + 1; i < store->parsed_nr; i++) {
2629 enum config_event_t type = store->parsed[i].type;
2630
2631 if (type == CONFIG_EVENT_COMMENT)
2632 return;
2633 if (type == CONFIG_EVENT_SECTION) {
2634 if (store->parsed[i].is_keys_section)
2635 continue;
2636 break;
2637 }
2638 if (type == CONFIG_EVENT_ENTRY) {
2639 if (++seen < store->seen_nr &&
2640 i == store->seen[seen])
2641 /* We want to remove this entry, too */
2642 continue;
2643 /* There is another entry in this section. */
2644 return;
2645 }
2646 }
2647
2648 /*
2649 * We are really removing the last entry/entries from this section, and
2650 * there are no enclosed or surrounding comments. Remove the entire,
2651 * now-empty section.
2652 */
2653 *seen_ptr = seen;
2654 *begin_offset = begin;
2655 if (i < store->parsed_nr)
2656 *end_offset = store->parsed[i].begin;
2657 else
2658 *end_offset = store->parsed[store->parsed_nr - 1].end;
2659 }
2660
2661 int git_config_set_in_file_gently(const char *config_filename,
2662 const char *key, const char *value)
2663 {
2664 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2665 }
2666
2667 void git_config_set_in_file(const char *config_filename,
2668 const char *key, const char *value)
2669 {
2670 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2671 }
2672
2673 int git_config_set_gently(const char *key, const char *value)
2674 {
2675 return git_config_set_multivar_gently(key, value, NULL, 0);
2676 }
2677
2678 void git_config_set(const char *key, const char *value)
2679 {
2680 git_config_set_multivar(key, value, NULL, 0);
2681
2682 trace2_cmd_set_config(key, value);
2683 }
2684
2685 /*
2686 * If value==NULL, unset in (remove from) config,
2687 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2688 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2689 * (only add a new one)
2690 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2691 * else all matching key/values (regardless how many) are removed,
2692 * before the new pair is written.
2693 *
2694 * Returns 0 on success.
2695 *
2696 * This function does this:
2697 *
2698 * - it locks the config file by creating ".git/config.lock"
2699 *
2700 * - it then parses the config using store_aux() as validator to find
2701 * the position on the key/value pair to replace. If it is to be unset,
2702 * it must be found exactly once.
2703 *
2704 * - the config file is mmap()ed and the part before the match (if any) is
2705 * written to the lock file, then the changed part and the rest.
2706 *
2707 * - the config file is removed and the lock file rename()d to it.
2708 *
2709 */
2710 int git_config_set_multivar_in_file_gently(const char *config_filename,
2711 const char *key, const char *value,
2712 const char *value_regex,
2713 int multi_replace)
2714 {
2715 int fd = -1, in_fd = -1;
2716 int ret;
2717 struct lock_file lock = LOCK_INIT;
2718 char *filename_buf = NULL;
2719 char *contents = NULL;
2720 size_t contents_sz;
2721 struct config_store_data store;
2722
2723 memset(&store, 0, sizeof(store));
2724
2725 /* parse-key returns negative; flip the sign to feed exit(3) */
2726 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2727 if (ret)
2728 goto out_free;
2729
2730 store.multi_replace = multi_replace;
2731
2732 if (!config_filename)
2733 config_filename = filename_buf = git_pathdup("config");
2734
2735 /*
2736 * The lock serves a purpose in addition to locking: the new
2737 * contents of .git/config will be written into it.
2738 */
2739 fd = hold_lock_file_for_update(&lock, config_filename, 0);
2740 if (fd < 0) {
2741 error_errno(_("could not lock config file %s"), config_filename);
2742 ret = CONFIG_NO_LOCK;
2743 goto out_free;
2744 }
2745
2746 /*
2747 * If .git/config does not exist yet, write a minimal version.
2748 */
2749 in_fd = open(config_filename, O_RDONLY);
2750 if ( in_fd < 0 ) {
2751 if ( ENOENT != errno ) {
2752 error_errno(_("opening %s"), config_filename);
2753 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2754 goto out_free;
2755 }
2756 /* if nothing to unset, error out */
2757 if (value == NULL) {
2758 ret = CONFIG_NOTHING_SET;
2759 goto out_free;
2760 }
2761
2762 free(store.key);
2763 store.key = xstrdup(key);
2764 if (write_section(fd, key, &store) < 0 ||
2765 write_pair(fd, key, value, &store) < 0)
2766 goto write_err_out;
2767 } else {
2768 struct stat st;
2769 size_t copy_begin, copy_end;
2770 int i, new_line = 0;
2771 struct config_options opts;
2772
2773 if (value_regex == NULL)
2774 store.value_regex = NULL;
2775 else if (value_regex == CONFIG_REGEX_NONE)
2776 store.value_regex = CONFIG_REGEX_NONE;
2777 else {
2778 if (value_regex[0] == '!') {
2779 store.do_not_match = 1;
2780 value_regex++;
2781 } else
2782 store.do_not_match = 0;
2783
2784 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2785 if (regcomp(store.value_regex, value_regex,
2786 REG_EXTENDED)) {
2787 error(_("invalid pattern: %s"), value_regex);
2788 FREE_AND_NULL(store.value_regex);
2789 ret = CONFIG_INVALID_PATTERN;
2790 goto out_free;
2791 }
2792 }
2793
2794 ALLOC_GROW(store.parsed, 1, store.parsed_alloc);
2795 store.parsed[0].end = 0;
2796
2797 memset(&opts, 0, sizeof(opts));
2798 opts.event_fn = store_aux_event;
2799 opts.event_fn_data = &store;
2800
2801 /*
2802 * After this, store.parsed will contain offsets of all the
2803 * parsed elements, and store.seen will contain a list of
2804 * matches, as indices into store.parsed.
2805 *
2806 * As a side effect, we make sure to transform only a valid
2807 * existing config file.
2808 */
2809 if (git_config_from_file_with_options(store_aux,
2810 config_filename,
2811 &store, &opts)) {
2812 error(_("invalid config file %s"), config_filename);
2813 ret = CONFIG_INVALID_FILE;
2814 goto out_free;
2815 }
2816
2817 /* if nothing to unset, or too many matches, error out */
2818 if ((store.seen_nr == 0 && value == NULL) ||
2819 (store.seen_nr > 1 && multi_replace == 0)) {
2820 ret = CONFIG_NOTHING_SET;
2821 goto out_free;
2822 }
2823
2824 if (fstat(in_fd, &st) == -1) {
2825 error_errno(_("fstat on %s failed"), config_filename);
2826 ret = CONFIG_INVALID_FILE;
2827 goto out_free;
2828 }
2829
2830 contents_sz = xsize_t(st.st_size);
2831 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2832 MAP_PRIVATE, in_fd, 0);
2833 if (contents == MAP_FAILED) {
2834 if (errno == ENODEV && S_ISDIR(st.st_mode))
2835 errno = EISDIR;
2836 error_errno(_("unable to mmap '%s'"), config_filename);
2837 ret = CONFIG_INVALID_FILE;
2838 contents = NULL;
2839 goto out_free;
2840 }
2841 close(in_fd);
2842 in_fd = -1;
2843
2844 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
2845 error_errno(_("chmod on %s failed"), get_lock_file_path(&lock));
2846 ret = CONFIG_NO_WRITE;
2847 goto out_free;
2848 }
2849
2850 if (store.seen_nr == 0) {
2851 if (!store.seen_alloc) {
2852 /* Did not see key nor section */
2853 ALLOC_GROW(store.seen, 1, store.seen_alloc);
2854 store.seen[0] = store.parsed_nr
2855 - !!store.parsed_nr;
2856 }
2857 store.seen_nr = 1;
2858 }
2859
2860 for (i = 0, copy_begin = 0; i < store.seen_nr; i++) {
2861 size_t replace_end;
2862 int j = store.seen[i];
2863
2864 new_line = 0;
2865 if (!store.key_seen) {
2866 copy_end = store.parsed[j].end;
2867 /* include '\n' when copying section header */
2868 if (copy_end > 0 && copy_end < contents_sz &&
2869 contents[copy_end - 1] != '\n' &&
2870 contents[copy_end] == '\n')
2871 copy_end++;
2872 replace_end = copy_end;
2873 } else {
2874 replace_end = store.parsed[j].end;
2875 copy_end = store.parsed[j].begin;
2876 if (!value)
2877 maybe_remove_section(&store,
2878 &copy_end,
2879 &replace_end, &i);
2880 /*
2881 * Swallow preceding white-space on the same
2882 * line.
2883 */
2884 while (copy_end > 0 ) {
2885 char c = contents[copy_end - 1];
2886
2887 if (isspace(c) && c != '\n')
2888 copy_end--;
2889 else
2890 break;
2891 }
2892 }
2893
2894 if (copy_end > 0 && contents[copy_end-1] != '\n')
2895 new_line = 1;
2896
2897 /* write the first part of the config */
2898 if (copy_end > copy_begin) {
2899 if (write_in_full(fd, contents + copy_begin,
2900 copy_end - copy_begin) < 0)
2901 goto write_err_out;
2902 if (new_line &&
2903 write_str_in_full(fd, "\n") < 0)
2904 goto write_err_out;
2905 }
2906 copy_begin = replace_end;
2907 }
2908
2909 /* write the pair (value == NULL means unset) */
2910 if (value != NULL) {
2911 if (!store.section_seen) {
2912 if (write_section(fd, key, &store) < 0)
2913 goto write_err_out;
2914 }
2915 if (write_pair(fd, key, value, &store) < 0)
2916 goto write_err_out;
2917 }
2918
2919 /* write the rest of the config */
2920 if (copy_begin < contents_sz)
2921 if (write_in_full(fd, contents + copy_begin,
2922 contents_sz - copy_begin) < 0)
2923 goto write_err_out;
2924
2925 munmap(contents, contents_sz);
2926 contents = NULL;
2927 }
2928
2929 if (commit_lock_file(&lock) < 0) {
2930 error_errno(_("could not write config file %s"), config_filename);
2931 ret = CONFIG_NO_WRITE;
2932 goto out_free;
2933 }
2934
2935 ret = 0;
2936
2937 /* Invalidate the config cache */
2938 git_config_clear();
2939
2940 out_free:
2941 rollback_lock_file(&lock);
2942 free(filename_buf);
2943 if (contents)
2944 munmap(contents, contents_sz);
2945 if (in_fd >= 0)
2946 close(in_fd);
2947 config_store_data_clear(&store);
2948 return ret;
2949
2950 write_err_out:
2951 ret = write_error(get_lock_file_path(&lock));
2952 goto out_free;
2953
2954 }
2955
2956 void git_config_set_multivar_in_file(const char *config_filename,
2957 const char *key, const char *value,
2958 const char *value_regex, int multi_replace)
2959 {
2960 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2961 value_regex, multi_replace))
2962 return;
2963 if (value)
2964 die(_("could not set '%s' to '%s'"), key, value);
2965 else
2966 die(_("could not unset '%s'"), key);
2967 }
2968
2969 int git_config_set_multivar_gently(const char *key, const char *value,
2970 const char *value_regex, int multi_replace)
2971 {
2972 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2973 multi_replace);
2974 }
2975
2976 void git_config_set_multivar(const char *key, const char *value,
2977 const char *value_regex, int multi_replace)
2978 {
2979 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2980 multi_replace);
2981 }
2982
2983 static int section_name_match (const char *buf, const char *name)
2984 {
2985 int i = 0, j = 0, dot = 0;
2986 if (buf[i] != '[')
2987 return 0;
2988 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2989 if (!dot && isspace(buf[i])) {
2990 dot = 1;
2991 if (name[j++] != '.')
2992 break;
2993 for (i++; isspace(buf[i]); i++)
2994 ; /* do nothing */
2995 if (buf[i] != '"')
2996 break;
2997 continue;
2998 }
2999 if (buf[i] == '\\' && dot)
3000 i++;
3001 else if (buf[i] == '"' && dot) {
3002 for (i++; isspace(buf[i]); i++)
3003 ; /* do_nothing */
3004 break;
3005 }
3006 if (buf[i] != name[j++])
3007 break;
3008 }
3009 if (buf[i] == ']' && name[j] == 0) {
3010 /*
3011 * We match, now just find the right length offset by
3012 * gobbling up any whitespace after it, as well
3013 */
3014 i++;
3015 for (; buf[i] && isspace(buf[i]); i++)
3016 ; /* do nothing */
3017 return i;
3018 }
3019 return 0;
3020 }
3021
3022 static int section_name_is_ok(const char *name)
3023 {
3024 /* Empty section names are bogus. */
3025 if (!*name)
3026 return 0;
3027
3028 /*
3029 * Before a dot, we must be alphanumeric or dash. After the first dot,
3030 * anything goes, so we can stop checking.
3031 */
3032 for (; *name && *name != '.'; name++)
3033 if (*name != '-' && !isalnum(*name))
3034 return 0;
3035 return 1;
3036 }
3037
3038 /* if new_name == NULL, the section is removed instead */
3039 static int git_config_copy_or_rename_section_in_file(const char *config_filename,
3040 const char *old_name,
3041 const char *new_name, int copy)
3042 {
3043 int ret = 0, remove = 0;
3044 char *filename_buf = NULL;
3045 struct lock_file lock = LOCK_INIT;
3046 int out_fd;
3047 char buf[1024];
3048 FILE *config_file = NULL;
3049 struct stat st;
3050 struct strbuf copystr = STRBUF_INIT;
3051 struct config_store_data store;
3052
3053 memset(&store, 0, sizeof(store));
3054
3055 if (new_name && !section_name_is_ok(new_name)) {
3056 ret = error(_("invalid section name: %s"), new_name);
3057 goto out_no_rollback;
3058 }
3059
3060 if (!config_filename)
3061 config_filename = filename_buf = git_pathdup("config");
3062
3063 out_fd = hold_lock_file_for_update(&lock, config_filename, 0);
3064 if (out_fd < 0) {
3065 ret = error(_("could not lock config file %s"), config_filename);
3066 goto out;
3067 }
3068
3069 if (!(config_file = fopen(config_filename, "rb"))) {
3070 ret = warn_on_fopen_errors(config_filename);
3071 if (ret)
3072 goto out;
3073 /* no config file means nothing to rename, no error */
3074 goto commit_and_out;
3075 }
3076
3077 if (fstat(fileno(config_file), &st) == -1) {
3078 ret = error_errno(_("fstat on %s failed"), config_filename);
3079 goto out;
3080 }
3081
3082 if (chmod(get_lock_file_path(&lock), st.st_mode & 07777) < 0) {
3083 ret = error_errno(_("chmod on %s failed"),
3084 get_lock_file_path(&lock));
3085 goto out;
3086 }
3087
3088 while (fgets(buf, sizeof(buf), config_file)) {
3089 int i;
3090 int length;
3091 int is_section = 0;
3092 char *output = buf;
3093 for (i = 0; buf[i] && isspace(buf[i]); i++)
3094 ; /* do nothing */
3095 if (buf[i] == '[') {
3096 /* it's a section */
3097 int offset;
3098 is_section = 1;
3099
3100 /*
3101 * When encountering a new section under -c we
3102 * need to flush out any section we're already
3103 * coping and begin anew. There might be
3104 * multiple [branch "$name"] sections.
3105 */
3106 if (copystr.len > 0) {
3107 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3108 ret = write_error(get_lock_file_path(&lock));
3109 goto out;
3110 }
3111 strbuf_reset(&copystr);
3112 }
3113
3114 offset = section_name_match(&buf[i], old_name);
3115 if (offset > 0) {
3116 ret++;
3117 if (new_name == NULL) {
3118 remove = 1;
3119 continue;
3120 }
3121 store.baselen = strlen(new_name);
3122 if (!copy) {
3123 if (write_section(out_fd, new_name, &store) < 0) {
3124 ret = write_error(get_lock_file_path(&lock));
3125 goto out;
3126 }
3127 /*
3128 * We wrote out the new section, with
3129 * a newline, now skip the old
3130 * section's length
3131 */
3132 output += offset + i;
3133 if (strlen(output) > 0) {
3134 /*
3135 * More content means there's
3136 * a declaration to put on the
3137 * next line; indent with a
3138 * tab
3139 */
3140 output -= 1;
3141 output[0] = '\t';
3142 }
3143 } else {
3144 copystr = store_create_section(new_name, &store);
3145 }
3146 }
3147 remove = 0;
3148 }
3149 if (remove)
3150 continue;
3151 length = strlen(output);
3152
3153 if (!is_section && copystr.len > 0) {
3154 strbuf_add(&copystr, output, length);
3155 }
3156
3157 if (write_in_full(out_fd, output, length) < 0) {
3158 ret = write_error(get_lock_file_path(&lock));
3159 goto out;
3160 }
3161 }
3162
3163 /*
3164 * Copy a trailing section at the end of the config, won't be
3165 * flushed by the usual "flush because we have a new section
3166 * logic in the loop above.
3167 */
3168 if (copystr.len > 0) {
3169 if (write_in_full(out_fd, copystr.buf, copystr.len) < 0) {
3170 ret = write_error(get_lock_file_path(&lock));
3171 goto out;
3172 }
3173 strbuf_reset(&copystr);
3174 }
3175
3176 fclose(config_file);
3177 config_file = NULL;
3178 commit_and_out:
3179 if (commit_lock_file(&lock) < 0)
3180 ret = error_errno(_("could not write config file %s"),
3181 config_filename);
3182 out:
3183 if (config_file)
3184 fclose(config_file);
3185 rollback_lock_file(&lock);
3186 out_no_rollback:
3187 free(filename_buf);
3188 config_store_data_clear(&store);
3189 return ret;
3190 }
3191
3192 int git_config_rename_section_in_file(const char *config_filename,
3193 const char *old_name, const char *new_name)
3194 {
3195 return git_config_copy_or_rename_section_in_file(config_filename,
3196 old_name, new_name, 0);
3197 }
3198
3199 int git_config_rename_section(const char *old_name, const char *new_name)
3200 {
3201 return git_config_rename_section_in_file(NULL, old_name, new_name);
3202 }
3203
3204 int git_config_copy_section_in_file(const char *config_filename,
3205 const char *old_name, const char *new_name)
3206 {
3207 return git_config_copy_or_rename_section_in_file(config_filename,
3208 old_name, new_name, 1);
3209 }
3210
3211 int git_config_copy_section(const char *old_name, const char *new_name)
3212 {
3213 return git_config_copy_section_in_file(NULL, old_name, new_name);
3214 }
3215
3216 /*
3217 * Call this to report error for your variable that should not
3218 * get a boolean value (i.e. "[my] var" means "true").
3219 */
3220 #undef config_error_nonbool
3221 int config_error_nonbool(const char *var)
3222 {
3223 return error(_("missing value for '%s'"), var);
3224 }
3225
3226 int parse_config_key(const char *var,
3227 const char *section,
3228 const char **subsection, int *subsection_len,
3229 const char **key)
3230 {
3231 const char *dot;
3232
3233 /* Does it start with "section." ? */
3234 if (!skip_prefix(var, section, &var) || *var != '.')
3235 return -1;
3236
3237 /*
3238 * Find the key; we don't know yet if we have a subsection, but we must
3239 * parse backwards from the end, since the subsection may have dots in
3240 * it, too.
3241 */
3242 dot = strrchr(var, '.');
3243 *key = dot + 1;
3244
3245 /* Did we have a subsection at all? */
3246 if (dot == var) {
3247 if (subsection) {
3248 *subsection = NULL;
3249 *subsection_len = 0;
3250 }
3251 }
3252 else {
3253 if (!subsection)
3254 return -1;
3255 *subsection = var + 1;
3256 *subsection_len = dot - *subsection;
3257 }
3258
3259 return 0;
3260 }
3261
3262 const char *current_config_origin_type(void)
3263 {
3264 int type;
3265 if (current_config_kvi)
3266 type = current_config_kvi->origin_type;
3267 else if(cf)
3268 type = cf->origin_type;
3269 else
3270 BUG("current_config_origin_type called outside config callback");
3271
3272 switch (type) {
3273 case CONFIG_ORIGIN_BLOB:
3274 return "blob";
3275 case CONFIG_ORIGIN_FILE:
3276 return "file";
3277 case CONFIG_ORIGIN_STDIN:
3278 return "standard input";
3279 case CONFIG_ORIGIN_SUBMODULE_BLOB:
3280 return "submodule-blob";
3281 case CONFIG_ORIGIN_CMDLINE:
3282 return "command line";
3283 default:
3284 BUG("unknown config origin type");
3285 }
3286 }
3287
3288 const char *current_config_name(void)
3289 {
3290 const char *name;
3291 if (current_config_kvi)
3292 name = current_config_kvi->filename;
3293 else if (cf)
3294 name = cf->name;
3295 else
3296 BUG("current_config_name called outside config callback");
3297 return name ? name : "";
3298 }
3299
3300 enum config_scope current_config_scope(void)
3301 {
3302 if (current_config_kvi)
3303 return current_config_kvi->scope;
3304 else
3305 return current_parsing_scope;
3306 }
3307
3308 int lookup_config(const char **mapping, int nr_mapping, const char *var)
3309 {
3310 int i;
3311
3312 for (i = 0; i < nr_mapping; i++) {
3313 const char *name = mapping[i];
3314
3315 if (name && !strcasecmp(var, name))
3316 return i;
3317 }
3318 return -1;
3319 }