submodule: prevent backslash expantion in submodule names
[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 "lockfile.h"
10 #include "exec_cmd.h"
11 #include "strbuf.h"
12 #include "quote.h"
13 #include "hashmap.h"
14 #include "string-list.h"
15 #include "utf8.h"
16 #include "dir.h"
17
18 struct config_source {
19 struct config_source *prev;
20 union {
21 FILE *file;
22 struct config_buf {
23 const char *buf;
24 size_t len;
25 size_t pos;
26 } buf;
27 } u;
28 enum config_origin_type origin_type;
29 const char *name;
30 const char *path;
31 int die_on_error;
32 int linenr;
33 int eof;
34 struct strbuf value;
35 struct strbuf var;
36
37 int (*do_fgetc)(struct config_source *c);
38 int (*do_ungetc)(int c, struct config_source *conf);
39 long (*do_ftell)(struct config_source *c);
40 };
41
42 /*
43 * These variables record the "current" config source, which
44 * can be accessed by parsing callbacks.
45 *
46 * The "cf" variable will be non-NULL only when we are actually parsing a real
47 * config source (file, blob, cmdline, etc).
48 *
49 * The "current_config_kvi" variable will be non-NULL only when we are feeding
50 * cached config from a configset into a callback.
51 *
52 * They should generally never be non-NULL at the same time. If they are both
53 * NULL, then we aren't parsing anything (and depending on the function looking
54 * at the variables, it's either a bug for it to be called in the first place,
55 * or it's a function which can be reused for non-config purposes, and should
56 * fall back to some sane behavior).
57 */
58 static struct config_source *cf;
59 static struct key_value_info *current_config_kvi;
60
61 /*
62 * Similar to the variables above, this gives access to the "scope" of the
63 * current value (repo, global, etc). For cached values, it can be found via
64 * the current_config_kvi as above. During parsing, the current value can be
65 * found in this variable. It's not part of "cf" because it transcends a single
66 * file (i.e., a file included from .git/config is still in "repo" scope).
67 */
68 static enum config_scope current_parsing_scope;
69
70 static int core_compression_seen;
71 static int pack_compression_seen;
72 static int zlib_compression_seen;
73
74 /*
75 * Default config_set that contains key-value pairs from the usual set of config
76 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
77 * config file and the global /etc/gitconfig)
78 */
79 static struct config_set the_config_set;
80
81 static int config_file_fgetc(struct config_source *conf)
82 {
83 return getc_unlocked(conf->u.file);
84 }
85
86 static int config_file_ungetc(int c, struct config_source *conf)
87 {
88 return ungetc(c, conf->u.file);
89 }
90
91 static long config_file_ftell(struct config_source *conf)
92 {
93 return ftell(conf->u.file);
94 }
95
96
97 static int config_buf_fgetc(struct config_source *conf)
98 {
99 if (conf->u.buf.pos < conf->u.buf.len)
100 return conf->u.buf.buf[conf->u.buf.pos++];
101
102 return EOF;
103 }
104
105 static int config_buf_ungetc(int c, struct config_source *conf)
106 {
107 if (conf->u.buf.pos > 0) {
108 conf->u.buf.pos--;
109 if (conf->u.buf.buf[conf->u.buf.pos] != c)
110 die("BUG: config_buf can only ungetc the same character");
111 return c;
112 }
113
114 return EOF;
115 }
116
117 static long config_buf_ftell(struct config_source *conf)
118 {
119 return conf->u.buf.pos;
120 }
121
122 #define MAX_INCLUDE_DEPTH 10
123 static const char include_depth_advice[] =
124 "exceeded maximum include depth (%d) while including\n"
125 " %s\n"
126 "from\n"
127 " %s\n"
128 "Do you have circular includes?";
129 static int handle_path_include(const char *path, struct config_include_data *inc)
130 {
131 int ret = 0;
132 struct strbuf buf = STRBUF_INIT;
133 char *expanded;
134
135 if (!path)
136 return config_error_nonbool("include.path");
137
138 expanded = expand_user_path(path);
139 if (!expanded)
140 return error("could not expand include path '%s'", path);
141 path = expanded;
142
143 /*
144 * Use an absolute path as-is, but interpret relative paths
145 * based on the including config file.
146 */
147 if (!is_absolute_path(path)) {
148 char *slash;
149
150 if (!cf || !cf->path)
151 return error("relative config includes must come from files");
152
153 slash = find_last_dir_sep(cf->path);
154 if (slash)
155 strbuf_add(&buf, cf->path, slash - cf->path + 1);
156 strbuf_addstr(&buf, path);
157 path = buf.buf;
158 }
159
160 if (!access_or_die(path, R_OK, 0)) {
161 if (++inc->depth > MAX_INCLUDE_DEPTH)
162 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
163 !cf ? "<unknown>" :
164 cf->name ? cf->name :
165 "the command line");
166 ret = git_config_from_file(git_config_include, path, inc);
167 inc->depth--;
168 }
169 strbuf_release(&buf);
170 free(expanded);
171 return ret;
172 }
173
174 static int prepare_include_condition_pattern(struct strbuf *pat)
175 {
176 struct strbuf path = STRBUF_INIT;
177 char *expanded;
178 int prefix = 0;
179
180 expanded = expand_user_path(pat->buf);
181 if (expanded) {
182 strbuf_reset(pat);
183 strbuf_addstr(pat, expanded);
184 free(expanded);
185 }
186
187 if (pat->buf[0] == '.' && is_dir_sep(pat->buf[1])) {
188 const char *slash;
189
190 if (!cf || !cf->path)
191 return error(_("relative config include "
192 "conditionals must come from files"));
193
194 strbuf_add_absolute_path(&path, cf->path);
195 slash = find_last_dir_sep(path.buf);
196 if (!slash)
197 die("BUG: how is this possible?");
198 strbuf_splice(pat, 0, 1, path.buf, slash - path.buf);
199 prefix = slash - path.buf + 1 /* slash */;
200 } else if (!is_absolute_path(pat->buf))
201 strbuf_insert(pat, 0, "**/", 3);
202
203 if (pat->len && is_dir_sep(pat->buf[pat->len - 1]))
204 strbuf_addstr(pat, "**");
205
206 strbuf_release(&path);
207 return prefix;
208 }
209
210 static int include_by_gitdir(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
216 strbuf_add_absolute_path(&text, get_git_dir());
217 strbuf_add(&pattern, cond, cond_len);
218 prefix = prepare_include_condition_pattern(&pattern);
219
220 if (prefix < 0)
221 goto done;
222
223 if (prefix > 0) {
224 /*
225 * perform literal matching on the prefix part so that
226 * any wildcard character in it can't create side effects.
227 */
228 if (text.len < prefix)
229 goto done;
230 if (!icase && strncmp(pattern.buf, text.buf, prefix))
231 goto done;
232 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
233 goto done;
234 }
235
236 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
237 icase ? WM_CASEFOLD : 0, NULL);
238
239 done:
240 strbuf_release(&pattern);
241 strbuf_release(&text);
242 return ret;
243 }
244
245 static int include_condition_is_true(const char *cond, size_t cond_len)
246 {
247
248 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
249 return include_by_gitdir(cond, cond_len, 0);
250 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
251 return include_by_gitdir(cond, cond_len, 1);
252
253 /* unknown conditionals are always false */
254 return 0;
255 }
256
257 int git_config_include(const char *var, const char *value, void *data)
258 {
259 struct config_include_data *inc = data;
260 const char *cond, *key;
261 int cond_len;
262 int ret;
263
264 /*
265 * Pass along all values, including "include" directives; this makes it
266 * possible to query information on the includes themselves.
267 */
268 ret = inc->fn(var, value, inc->data);
269 if (ret < 0)
270 return ret;
271
272 if (!strcmp(var, "include.path"))
273 ret = handle_path_include(value, inc);
274
275 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
276 (cond && include_condition_is_true(cond, cond_len)) &&
277 !strcmp(key, "path"))
278 ret = handle_path_include(value, inc);
279
280 return ret;
281 }
282
283 void git_config_push_parameter(const char *text)
284 {
285 struct strbuf env = STRBUF_INIT;
286 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
287 if (old && *old) {
288 strbuf_addstr(&env, old);
289 strbuf_addch(&env, ' ');
290 }
291 sq_quote_buf(&env, text);
292 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
293 strbuf_release(&env);
294 }
295
296 static inline int iskeychar(int c)
297 {
298 return isalnum(c) || c == '-';
299 }
300
301 /*
302 * Auxiliary function to sanity-check and split the key into the section
303 * identifier and variable name.
304 *
305 * Returns 0 on success, -1 when there is an invalid character in the key and
306 * -2 if there is no section name in the key.
307 *
308 * store_key - pointer to char* which will hold a copy of the key with
309 * lowercase section and variable name
310 * baselen - pointer to int which will hold the length of the
311 * section + subsection part, can be NULL
312 */
313 static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
314 {
315 int i, dot, baselen;
316 const char *last_dot = strrchr(key, '.');
317
318 /*
319 * Since "key" actually contains the section name and the real
320 * key name separated by a dot, we have to know where the dot is.
321 */
322
323 if (last_dot == NULL || last_dot == key) {
324 if (!quiet)
325 error("key does not contain a section: %s", key);
326 return -CONFIG_NO_SECTION_OR_NAME;
327 }
328
329 if (!last_dot[1]) {
330 if (!quiet)
331 error("key does not contain variable name: %s", key);
332 return -CONFIG_NO_SECTION_OR_NAME;
333 }
334
335 baselen = last_dot - key;
336 if (baselen_)
337 *baselen_ = baselen;
338
339 /*
340 * Validate the key and while at it, lower case it for matching.
341 */
342 if (store_key)
343 *store_key = xmallocz(strlen(key));
344
345 dot = 0;
346 for (i = 0; key[i]; i++) {
347 unsigned char c = key[i];
348 if (c == '.')
349 dot = 1;
350 /* Leave the extended basename untouched.. */
351 if (!dot || i > baselen) {
352 if (!iskeychar(c) ||
353 (i == baselen + 1 && !isalpha(c))) {
354 if (!quiet)
355 error("invalid key: %s", key);
356 goto out_free_ret_1;
357 }
358 c = tolower(c);
359 } else if (c == '\n') {
360 if (!quiet)
361 error("invalid key (newline): %s", key);
362 goto out_free_ret_1;
363 }
364 if (store_key)
365 (*store_key)[i] = c;
366 }
367
368 return 0;
369
370 out_free_ret_1:
371 if (store_key) {
372 free(*store_key);
373 *store_key = NULL;
374 }
375 return -CONFIG_INVALID_KEY;
376 }
377
378 int git_config_parse_key(const char *key, char **store_key, int *baselen)
379 {
380 return git_config_parse_key_1(key, store_key, baselen, 0);
381 }
382
383 int git_config_key_is_valid(const char *key)
384 {
385 return !git_config_parse_key_1(key, NULL, NULL, 1);
386 }
387
388 int git_config_parse_parameter(const char *text,
389 config_fn_t fn, void *data)
390 {
391 const char *value;
392 char *canonical_name;
393 struct strbuf **pair;
394 int ret;
395
396 pair = strbuf_split_str(text, '=', 2);
397 if (!pair[0])
398 return error("bogus config parameter: %s", text);
399
400 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
401 strbuf_setlen(pair[0], pair[0]->len - 1);
402 value = pair[1] ? pair[1]->buf : "";
403 } else {
404 value = NULL;
405 }
406
407 strbuf_trim(pair[0]);
408 if (!pair[0]->len) {
409 strbuf_list_free(pair);
410 return error("bogus config parameter: %s", text);
411 }
412
413 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
414 ret = -1;
415 } else {
416 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
417 free(canonical_name);
418 }
419 strbuf_list_free(pair);
420 return ret;
421 }
422
423 int git_config_from_parameters(config_fn_t fn, void *data)
424 {
425 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
426 int ret = 0;
427 char *envw;
428 const char **argv = NULL;
429 int nr = 0, alloc = 0;
430 int i;
431 struct config_source source;
432
433 if (!env)
434 return 0;
435
436 memset(&source, 0, sizeof(source));
437 source.prev = cf;
438 source.origin_type = CONFIG_ORIGIN_CMDLINE;
439 cf = &source;
440
441 /* sq_dequote will write over it */
442 envw = xstrdup(env);
443
444 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
445 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
446 goto out;
447 }
448
449 for (i = 0; i < nr; i++) {
450 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
451 ret = -1;
452 goto out;
453 }
454 }
455
456 out:
457 free(argv);
458 free(envw);
459 cf = source.prev;
460 return ret;
461 }
462
463 static int get_next_char(void)
464 {
465 int c = cf->do_fgetc(cf);
466
467 if (c == '\r') {
468 /* DOS like systems */
469 c = cf->do_fgetc(cf);
470 if (c != '\n') {
471 if (c != EOF)
472 cf->do_ungetc(c, cf);
473 c = '\r';
474 }
475 }
476 if (c == '\n')
477 cf->linenr++;
478 if (c == EOF) {
479 cf->eof = 1;
480 cf->linenr++;
481 c = '\n';
482 }
483 return c;
484 }
485
486 static char *parse_value(void)
487 {
488 int quote = 0, comment = 0, space = 0;
489
490 strbuf_reset(&cf->value);
491 for (;;) {
492 int c = get_next_char();
493 if (c == '\n') {
494 if (quote) {
495 cf->linenr--;
496 return NULL;
497 }
498 return cf->value.buf;
499 }
500 if (comment)
501 continue;
502 if (isspace(c) && !quote) {
503 if (cf->value.len)
504 space++;
505 continue;
506 }
507 if (!quote) {
508 if (c == ';' || c == '#') {
509 comment = 1;
510 continue;
511 }
512 }
513 for (; space; space--)
514 strbuf_addch(&cf->value, ' ');
515 if (c == '\\') {
516 c = get_next_char();
517 switch (c) {
518 case '\n':
519 continue;
520 case 't':
521 c = '\t';
522 break;
523 case 'b':
524 c = '\b';
525 break;
526 case 'n':
527 c = '\n';
528 break;
529 /* Some characters escape as themselves */
530 case '\\': case '"':
531 break;
532 /* Reject unknown escape sequences */
533 default:
534 return NULL;
535 }
536 strbuf_addch(&cf->value, c);
537 continue;
538 }
539 if (c == '"') {
540 quote = 1-quote;
541 continue;
542 }
543 strbuf_addch(&cf->value, c);
544 }
545 }
546
547 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
548 {
549 int c;
550 char *value;
551 int ret;
552
553 /* Get the full name */
554 for (;;) {
555 c = get_next_char();
556 if (cf->eof)
557 break;
558 if (!iskeychar(c))
559 break;
560 strbuf_addch(name, tolower(c));
561 }
562
563 while (c == ' ' || c == '\t')
564 c = get_next_char();
565
566 value = NULL;
567 if (c != '\n') {
568 if (c != '=')
569 return -1;
570 value = parse_value();
571 if (!value)
572 return -1;
573 }
574 /*
575 * We already consumed the \n, but we need linenr to point to
576 * the line we just parsed during the call to fn to get
577 * accurate line number in error messages.
578 */
579 cf->linenr--;
580 ret = fn(name->buf, value, data);
581 cf->linenr++;
582 return ret;
583 }
584
585 static int get_extended_base_var(struct strbuf *name, int c)
586 {
587 do {
588 if (c == '\n')
589 goto error_incomplete_line;
590 c = get_next_char();
591 } while (isspace(c));
592
593 /* We require the format to be '[base "extension"]' */
594 if (c != '"')
595 return -1;
596 strbuf_addch(name, '.');
597
598 for (;;) {
599 int c = get_next_char();
600 if (c == '\n')
601 goto error_incomplete_line;
602 if (c == '"')
603 break;
604 if (c == '\\') {
605 c = get_next_char();
606 if (c == '\n')
607 goto error_incomplete_line;
608 }
609 strbuf_addch(name, c);
610 }
611
612 /* Final ']' */
613 if (get_next_char() != ']')
614 return -1;
615 return 0;
616 error_incomplete_line:
617 cf->linenr--;
618 return -1;
619 }
620
621 static int get_base_var(struct strbuf *name)
622 {
623 for (;;) {
624 int c = get_next_char();
625 if (cf->eof)
626 return -1;
627 if (c == ']')
628 return 0;
629 if (isspace(c))
630 return get_extended_base_var(name, c);
631 if (!iskeychar(c) && c != '.')
632 return -1;
633 strbuf_addch(name, tolower(c));
634 }
635 }
636
637 static int git_parse_source(config_fn_t fn, void *data)
638 {
639 int comment = 0;
640 int baselen = 0;
641 struct strbuf *var = &cf->var;
642 int error_return = 0;
643 char *error_msg = NULL;
644
645 /* U+FEFF Byte Order Mark in UTF8 */
646 const char *bomptr = utf8_bom;
647
648 for (;;) {
649 int c = get_next_char();
650 if (bomptr && *bomptr) {
651 /* We are at the file beginning; skip UTF8-encoded BOM
652 * if present. Sane editors won't put this in on their
653 * own, but e.g. Windows Notepad will do it happily. */
654 if (c == (*bomptr & 0377)) {
655 bomptr++;
656 continue;
657 } else {
658 /* Do not tolerate partial BOM. */
659 if (bomptr != utf8_bom)
660 break;
661 /* No BOM at file beginning. Cool. */
662 bomptr = NULL;
663 }
664 }
665 if (c == '\n') {
666 if (cf->eof)
667 return 0;
668 comment = 0;
669 continue;
670 }
671 if (comment || isspace(c))
672 continue;
673 if (c == '#' || c == ';') {
674 comment = 1;
675 continue;
676 }
677 if (c == '[') {
678 /* Reset prior to determining a new stem */
679 strbuf_reset(var);
680 if (get_base_var(var) < 0 || var->len < 1)
681 break;
682 strbuf_addch(var, '.');
683 baselen = var->len;
684 continue;
685 }
686 if (!isalpha(c))
687 break;
688 /*
689 * Truncate the var name back to the section header
690 * stem prior to grabbing the suffix part of the name
691 * and the value.
692 */
693 strbuf_setlen(var, baselen);
694 strbuf_addch(var, tolower(c));
695 if (get_value(fn, data, var) < 0)
696 break;
697 }
698
699 switch (cf->origin_type) {
700 case CONFIG_ORIGIN_BLOB:
701 error_msg = xstrfmt(_("bad config line %d in blob %s"),
702 cf->linenr, cf->name);
703 break;
704 case CONFIG_ORIGIN_FILE:
705 error_msg = xstrfmt(_("bad config line %d in file %s"),
706 cf->linenr, cf->name);
707 break;
708 case CONFIG_ORIGIN_STDIN:
709 error_msg = xstrfmt(_("bad config line %d in standard input"),
710 cf->linenr);
711 break;
712 case CONFIG_ORIGIN_SUBMODULE_BLOB:
713 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
714 cf->linenr, cf->name);
715 break;
716 case CONFIG_ORIGIN_CMDLINE:
717 error_msg = xstrfmt(_("bad config line %d in command line %s"),
718 cf->linenr, cf->name);
719 break;
720 default:
721 error_msg = xstrfmt(_("bad config line %d in %s"),
722 cf->linenr, cf->name);
723 }
724
725 if (cf->die_on_error)
726 die("%s", error_msg);
727 else
728 error_return = error("%s", error_msg);
729
730 free(error_msg);
731 return error_return;
732 }
733
734 static int parse_unit_factor(const char *end, uintmax_t *val)
735 {
736 if (!*end)
737 return 1;
738 else if (!strcasecmp(end, "k")) {
739 *val *= 1024;
740 return 1;
741 }
742 else if (!strcasecmp(end, "m")) {
743 *val *= 1024 * 1024;
744 return 1;
745 }
746 else if (!strcasecmp(end, "g")) {
747 *val *= 1024 * 1024 * 1024;
748 return 1;
749 }
750 return 0;
751 }
752
753 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
754 {
755 if (value && *value) {
756 char *end;
757 intmax_t val;
758 uintmax_t uval;
759 uintmax_t factor = 1;
760
761 errno = 0;
762 val = strtoimax(value, &end, 0);
763 if (errno == ERANGE)
764 return 0;
765 if (!parse_unit_factor(end, &factor)) {
766 errno = EINVAL;
767 return 0;
768 }
769 uval = labs(val);
770 uval *= factor;
771 if (uval > max || labs(val) > uval) {
772 errno = ERANGE;
773 return 0;
774 }
775 val *= factor;
776 *ret = val;
777 return 1;
778 }
779 errno = EINVAL;
780 return 0;
781 }
782
783 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
784 {
785 if (value && *value) {
786 char *end;
787 uintmax_t val;
788 uintmax_t oldval;
789
790 errno = 0;
791 val = strtoumax(value, &end, 0);
792 if (errno == ERANGE)
793 return 0;
794 oldval = val;
795 if (!parse_unit_factor(end, &val)) {
796 errno = EINVAL;
797 return 0;
798 }
799 if (val > max || oldval > val) {
800 errno = ERANGE;
801 return 0;
802 }
803 *ret = val;
804 return 1;
805 }
806 errno = EINVAL;
807 return 0;
808 }
809
810 static int git_parse_int(const char *value, int *ret)
811 {
812 intmax_t tmp;
813 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
814 return 0;
815 *ret = tmp;
816 return 1;
817 }
818
819 static int git_parse_int64(const char *value, int64_t *ret)
820 {
821 intmax_t tmp;
822 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
823 return 0;
824 *ret = tmp;
825 return 1;
826 }
827
828 int git_parse_ulong(const char *value, unsigned long *ret)
829 {
830 uintmax_t tmp;
831 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
832 return 0;
833 *ret = tmp;
834 return 1;
835 }
836
837 NORETURN
838 static void die_bad_number(const char *name, const char *value)
839 {
840 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
841
842 if (!value)
843 value = "";
844
845 if (!(cf && cf->name))
846 die(_("bad numeric config value '%s' for '%s': %s"),
847 value, name, error_type);
848
849 switch (cf->origin_type) {
850 case CONFIG_ORIGIN_BLOB:
851 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
852 value, name, cf->name, error_type);
853 case CONFIG_ORIGIN_FILE:
854 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
855 value, name, cf->name, error_type);
856 case CONFIG_ORIGIN_STDIN:
857 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
858 value, name, error_type);
859 case CONFIG_ORIGIN_SUBMODULE_BLOB:
860 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
861 value, name, cf->name, error_type);
862 case CONFIG_ORIGIN_CMDLINE:
863 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
864 value, name, cf->name, error_type);
865 default:
866 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
867 value, name, cf->name, error_type);
868 }
869 }
870
871 int git_config_int(const char *name, const char *value)
872 {
873 int ret;
874 if (!git_parse_int(value, &ret))
875 die_bad_number(name, value);
876 return ret;
877 }
878
879 int64_t git_config_int64(const char *name, const char *value)
880 {
881 int64_t ret;
882 if (!git_parse_int64(value, &ret))
883 die_bad_number(name, value);
884 return ret;
885 }
886
887 unsigned long git_config_ulong(const char *name, const char *value)
888 {
889 unsigned long ret;
890 if (!git_parse_ulong(value, &ret))
891 die_bad_number(name, value);
892 return ret;
893 }
894
895 int git_parse_maybe_bool(const char *value)
896 {
897 if (!value)
898 return 1;
899 if (!*value)
900 return 0;
901 if (!strcasecmp(value, "true")
902 || !strcasecmp(value, "yes")
903 || !strcasecmp(value, "on"))
904 return 1;
905 if (!strcasecmp(value, "false")
906 || !strcasecmp(value, "no")
907 || !strcasecmp(value, "off"))
908 return 0;
909 return -1;
910 }
911
912 int git_config_maybe_bool(const char *name, const char *value)
913 {
914 int v = git_parse_maybe_bool(value);
915 if (0 <= v)
916 return v;
917 if (git_parse_int(value, &v))
918 return !!v;
919 return -1;
920 }
921
922 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
923 {
924 int v = git_parse_maybe_bool(value);
925 if (0 <= v) {
926 *is_bool = 1;
927 return v;
928 }
929 *is_bool = 0;
930 return git_config_int(name, value);
931 }
932
933 int git_config_bool(const char *name, const char *value)
934 {
935 int discard;
936 return !!git_config_bool_or_int(name, value, &discard);
937 }
938
939 int git_config_string(const char **dest, const char *var, const char *value)
940 {
941 if (!value)
942 return config_error_nonbool(var);
943 *dest = xstrdup(value);
944 return 0;
945 }
946
947 int git_config_pathname(const char **dest, const char *var, const char *value)
948 {
949 if (!value)
950 return config_error_nonbool(var);
951 *dest = expand_user_path(value);
952 if (!*dest)
953 die(_("failed to expand user dir in: '%s'"), value);
954 return 0;
955 }
956
957 static int git_default_core_config(const char *var, const char *value)
958 {
959 /* This needs a better name */
960 if (!strcmp(var, "core.filemode")) {
961 trust_executable_bit = git_config_bool(var, value);
962 return 0;
963 }
964 if (!strcmp(var, "core.trustctime")) {
965 trust_ctime = git_config_bool(var, value);
966 return 0;
967 }
968 if (!strcmp(var, "core.checkstat")) {
969 if (!strcasecmp(value, "default"))
970 check_stat = 1;
971 else if (!strcasecmp(value, "minimal"))
972 check_stat = 0;
973 }
974
975 if (!strcmp(var, "core.quotepath")) {
976 quote_path_fully = git_config_bool(var, value);
977 return 0;
978 }
979
980 if (!strcmp(var, "core.symlinks")) {
981 has_symlinks = git_config_bool(var, value);
982 return 0;
983 }
984
985 if (!strcmp(var, "core.ignorecase")) {
986 ignore_case = git_config_bool(var, value);
987 return 0;
988 }
989
990 if (!strcmp(var, "core.attributesfile"))
991 return git_config_pathname(&git_attributes_file, var, value);
992
993 if (!strcmp(var, "core.hookspath"))
994 return git_config_pathname(&git_hooks_path, var, value);
995
996 if (!strcmp(var, "core.bare")) {
997 is_bare_repository_cfg = git_config_bool(var, value);
998 return 0;
999 }
1000
1001 if (!strcmp(var, "core.ignorestat")) {
1002 assume_unchanged = git_config_bool(var, value);
1003 return 0;
1004 }
1005
1006 if (!strcmp(var, "core.prefersymlinkrefs")) {
1007 prefer_symlink_refs = git_config_bool(var, value);
1008 return 0;
1009 }
1010
1011 if (!strcmp(var, "core.logallrefupdates")) {
1012 if (value && !strcasecmp(value, "always"))
1013 log_all_ref_updates = LOG_REFS_ALWAYS;
1014 else if (git_config_bool(var, value))
1015 log_all_ref_updates = LOG_REFS_NORMAL;
1016 else
1017 log_all_ref_updates = LOG_REFS_NONE;
1018 return 0;
1019 }
1020
1021 if (!strcmp(var, "core.warnambiguousrefs")) {
1022 warn_ambiguous_refs = git_config_bool(var, value);
1023 return 0;
1024 }
1025
1026 if (!strcmp(var, "core.abbrev")) {
1027 if (!value)
1028 return config_error_nonbool(var);
1029 if (!strcasecmp(value, "auto"))
1030 default_abbrev = -1;
1031 else {
1032 int abbrev = git_config_int(var, value);
1033 if (abbrev < minimum_abbrev || abbrev > 40)
1034 return error("abbrev length out of range: %d", abbrev);
1035 default_abbrev = abbrev;
1036 }
1037 return 0;
1038 }
1039
1040 if (!strcmp(var, "core.disambiguate"))
1041 return set_disambiguate_hint_config(var, value);
1042
1043 if (!strcmp(var, "core.loosecompression")) {
1044 int level = git_config_int(var, value);
1045 if (level == -1)
1046 level = Z_DEFAULT_COMPRESSION;
1047 else if (level < 0 || level > Z_BEST_COMPRESSION)
1048 die(_("bad zlib compression level %d"), level);
1049 zlib_compression_level = level;
1050 zlib_compression_seen = 1;
1051 return 0;
1052 }
1053
1054 if (!strcmp(var, "core.compression")) {
1055 int level = git_config_int(var, value);
1056 if (level == -1)
1057 level = Z_DEFAULT_COMPRESSION;
1058 else if (level < 0 || level > Z_BEST_COMPRESSION)
1059 die(_("bad zlib compression level %d"), level);
1060 core_compression_level = level;
1061 core_compression_seen = 1;
1062 if (!zlib_compression_seen)
1063 zlib_compression_level = level;
1064 if (!pack_compression_seen)
1065 pack_compression_level = level;
1066 return 0;
1067 }
1068
1069 if (!strcmp(var, "core.packedgitwindowsize")) {
1070 int pgsz_x2 = getpagesize() * 2;
1071 packed_git_window_size = git_config_ulong(var, value);
1072
1073 /* This value must be multiple of (pagesize * 2) */
1074 packed_git_window_size /= pgsz_x2;
1075 if (packed_git_window_size < 1)
1076 packed_git_window_size = 1;
1077 packed_git_window_size *= pgsz_x2;
1078 return 0;
1079 }
1080
1081 if (!strcmp(var, "core.bigfilethreshold")) {
1082 big_file_threshold = git_config_ulong(var, value);
1083 return 0;
1084 }
1085
1086 if (!strcmp(var, "core.packedgitlimit")) {
1087 packed_git_limit = git_config_ulong(var, value);
1088 return 0;
1089 }
1090
1091 if (!strcmp(var, "core.deltabasecachelimit")) {
1092 delta_base_cache_limit = git_config_ulong(var, value);
1093 return 0;
1094 }
1095
1096 if (!strcmp(var, "core.autocrlf")) {
1097 if (value && !strcasecmp(value, "input")) {
1098 auto_crlf = AUTO_CRLF_INPUT;
1099 return 0;
1100 }
1101 auto_crlf = git_config_bool(var, value);
1102 return 0;
1103 }
1104
1105 if (!strcmp(var, "core.safecrlf")) {
1106 if (value && !strcasecmp(value, "warn")) {
1107 safe_crlf = SAFE_CRLF_WARN;
1108 return 0;
1109 }
1110 safe_crlf = git_config_bool(var, value);
1111 return 0;
1112 }
1113
1114 if (!strcmp(var, "core.eol")) {
1115 if (value && !strcasecmp(value, "lf"))
1116 core_eol = EOL_LF;
1117 else if (value && !strcasecmp(value, "crlf"))
1118 core_eol = EOL_CRLF;
1119 else if (value && !strcasecmp(value, "native"))
1120 core_eol = EOL_NATIVE;
1121 else
1122 core_eol = EOL_UNSET;
1123 return 0;
1124 }
1125
1126 if (!strcmp(var, "core.notesref")) {
1127 notes_ref_name = xstrdup(value);
1128 return 0;
1129 }
1130
1131 if (!strcmp(var, "core.editor"))
1132 return git_config_string(&editor_program, var, value);
1133
1134 if (!strcmp(var, "core.commentchar")) {
1135 if (!value)
1136 return config_error_nonbool(var);
1137 else if (!strcasecmp(value, "auto"))
1138 auto_comment_line_char = 1;
1139 else if (value[0] && !value[1]) {
1140 comment_line_char = value[0];
1141 auto_comment_line_char = 0;
1142 } else
1143 return error("core.commentChar should only be one character");
1144 return 0;
1145 }
1146
1147 if (!strcmp(var, "core.askpass"))
1148 return git_config_string(&askpass_program, var, value);
1149
1150 if (!strcmp(var, "core.excludesfile"))
1151 return git_config_pathname(&excludes_file, var, value);
1152
1153 if (!strcmp(var, "core.whitespace")) {
1154 if (!value)
1155 return config_error_nonbool(var);
1156 whitespace_rule_cfg = parse_whitespace_rule(value);
1157 return 0;
1158 }
1159
1160 if (!strcmp(var, "core.fsyncobjectfiles")) {
1161 fsync_object_files = git_config_bool(var, value);
1162 return 0;
1163 }
1164
1165 if (!strcmp(var, "core.preloadindex")) {
1166 core_preload_index = git_config_bool(var, value);
1167 return 0;
1168 }
1169
1170 if (!strcmp(var, "core.createobject")) {
1171 if (!strcmp(value, "rename"))
1172 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1173 else if (!strcmp(value, "link"))
1174 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1175 else
1176 die(_("invalid mode for object creation: %s"), value);
1177 return 0;
1178 }
1179
1180 if (!strcmp(var, "core.sparsecheckout")) {
1181 core_apply_sparse_checkout = git_config_bool(var, value);
1182 return 0;
1183 }
1184
1185 if (!strcmp(var, "core.precomposeunicode")) {
1186 precomposed_unicode = git_config_bool(var, value);
1187 return 0;
1188 }
1189
1190 if (!strcmp(var, "core.protecthfs")) {
1191 protect_hfs = git_config_bool(var, value);
1192 return 0;
1193 }
1194
1195 if (!strcmp(var, "core.protectntfs")) {
1196 protect_ntfs = git_config_bool(var, value);
1197 return 0;
1198 }
1199
1200 if (!strcmp(var, "core.hidedotfiles")) {
1201 if (value && !strcasecmp(value, "dotgitonly"))
1202 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1203 else
1204 hide_dotfiles = git_config_bool(var, value);
1205 return 0;
1206 }
1207
1208 /* Add other config variables here and to Documentation/config.txt. */
1209 return 0;
1210 }
1211
1212 static int git_default_i18n_config(const char *var, const char *value)
1213 {
1214 if (!strcmp(var, "i18n.commitencoding"))
1215 return git_config_string(&git_commit_encoding, var, value);
1216
1217 if (!strcmp(var, "i18n.logoutputencoding"))
1218 return git_config_string(&git_log_output_encoding, var, value);
1219
1220 /* Add other config variables here and to Documentation/config.txt. */
1221 return 0;
1222 }
1223
1224 static int git_default_branch_config(const char *var, const char *value)
1225 {
1226 if (!strcmp(var, "branch.autosetupmerge")) {
1227 if (value && !strcasecmp(value, "always")) {
1228 git_branch_track = BRANCH_TRACK_ALWAYS;
1229 return 0;
1230 }
1231 git_branch_track = git_config_bool(var, value);
1232 return 0;
1233 }
1234 if (!strcmp(var, "branch.autosetuprebase")) {
1235 if (!value)
1236 return config_error_nonbool(var);
1237 else if (!strcmp(value, "never"))
1238 autorebase = AUTOREBASE_NEVER;
1239 else if (!strcmp(value, "local"))
1240 autorebase = AUTOREBASE_LOCAL;
1241 else if (!strcmp(value, "remote"))
1242 autorebase = AUTOREBASE_REMOTE;
1243 else if (!strcmp(value, "always"))
1244 autorebase = AUTOREBASE_ALWAYS;
1245 else
1246 return error("malformed value for %s", var);
1247 return 0;
1248 }
1249
1250 /* Add other config variables here and to Documentation/config.txt. */
1251 return 0;
1252 }
1253
1254 static int git_default_push_config(const char *var, const char *value)
1255 {
1256 if (!strcmp(var, "push.default")) {
1257 if (!value)
1258 return config_error_nonbool(var);
1259 else if (!strcmp(value, "nothing"))
1260 push_default = PUSH_DEFAULT_NOTHING;
1261 else if (!strcmp(value, "matching"))
1262 push_default = PUSH_DEFAULT_MATCHING;
1263 else if (!strcmp(value, "simple"))
1264 push_default = PUSH_DEFAULT_SIMPLE;
1265 else if (!strcmp(value, "upstream"))
1266 push_default = PUSH_DEFAULT_UPSTREAM;
1267 else if (!strcmp(value, "tracking")) /* deprecated */
1268 push_default = PUSH_DEFAULT_UPSTREAM;
1269 else if (!strcmp(value, "current"))
1270 push_default = PUSH_DEFAULT_CURRENT;
1271 else {
1272 error("malformed value for %s: %s", var, value);
1273 return error("Must be one of nothing, matching, simple, "
1274 "upstream or current.");
1275 }
1276 return 0;
1277 }
1278
1279 /* Add other config variables here and to Documentation/config.txt. */
1280 return 0;
1281 }
1282
1283 static int git_default_mailmap_config(const char *var, const char *value)
1284 {
1285 if (!strcmp(var, "mailmap.file"))
1286 return git_config_pathname(&git_mailmap_file, var, value);
1287 if (!strcmp(var, "mailmap.blob"))
1288 return git_config_string(&git_mailmap_blob, var, value);
1289
1290 /* Add other config variables here and to Documentation/config.txt. */
1291 return 0;
1292 }
1293
1294 int git_default_config(const char *var, const char *value, void *dummy)
1295 {
1296 if (starts_with(var, "core."))
1297 return git_default_core_config(var, value);
1298
1299 if (starts_with(var, "user."))
1300 return git_ident_config(var, value, dummy);
1301
1302 if (starts_with(var, "i18n."))
1303 return git_default_i18n_config(var, value);
1304
1305 if (starts_with(var, "branch."))
1306 return git_default_branch_config(var, value);
1307
1308 if (starts_with(var, "push."))
1309 return git_default_push_config(var, value);
1310
1311 if (starts_with(var, "mailmap."))
1312 return git_default_mailmap_config(var, value);
1313
1314 if (starts_with(var, "advice."))
1315 return git_default_advice_config(var, value);
1316
1317 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1318 pager_use_color = git_config_bool(var,value);
1319 return 0;
1320 }
1321
1322 if (!strcmp(var, "pack.packsizelimit")) {
1323 pack_size_limit_cfg = git_config_ulong(var, value);
1324 return 0;
1325 }
1326
1327 if (!strcmp(var, "pack.compression")) {
1328 int level = git_config_int(var, value);
1329 if (level == -1)
1330 level = Z_DEFAULT_COMPRESSION;
1331 else if (level < 0 || level > Z_BEST_COMPRESSION)
1332 die(_("bad pack compression level %d"), level);
1333 pack_compression_level = level;
1334 pack_compression_seen = 1;
1335 return 0;
1336 }
1337
1338 /* Add other config variables here and to Documentation/config.txt. */
1339 return 0;
1340 }
1341
1342 /*
1343 * All source specific fields in the union, die_on_error, name and the callbacks
1344 * fgetc, ungetc, ftell of top need to be initialized before calling
1345 * this function.
1346 */
1347 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1348 {
1349 int ret;
1350
1351 /* push config-file parsing state stack */
1352 top->prev = cf;
1353 top->linenr = 1;
1354 top->eof = 0;
1355 strbuf_init(&top->value, 1024);
1356 strbuf_init(&top->var, 1024);
1357 cf = top;
1358
1359 ret = git_parse_source(fn, data);
1360
1361 /* pop config-file parsing state stack */
1362 strbuf_release(&top->value);
1363 strbuf_release(&top->var);
1364 cf = top->prev;
1365
1366 return ret;
1367 }
1368
1369 static int do_config_from_file(config_fn_t fn,
1370 const enum config_origin_type origin_type,
1371 const char *name, const char *path, FILE *f,
1372 void *data)
1373 {
1374 struct config_source top;
1375
1376 top.u.file = f;
1377 top.origin_type = origin_type;
1378 top.name = name;
1379 top.path = path;
1380 top.die_on_error = 1;
1381 top.do_fgetc = config_file_fgetc;
1382 top.do_ungetc = config_file_ungetc;
1383 top.do_ftell = config_file_ftell;
1384
1385 return do_config_from(&top, fn, data);
1386 }
1387
1388 static int git_config_from_stdin(config_fn_t fn, void *data)
1389 {
1390 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1391 }
1392
1393 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1394 {
1395 int ret = -1;
1396 FILE *f;
1397
1398 f = fopen(filename, "r");
1399 if (f) {
1400 flockfile(f);
1401 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1402 funlockfile(f);
1403 fclose(f);
1404 }
1405 return ret;
1406 }
1407
1408 int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1409 const char *name, const char *buf, size_t len, void *data)
1410 {
1411 struct config_source top;
1412
1413 top.u.buf.buf = buf;
1414 top.u.buf.len = len;
1415 top.u.buf.pos = 0;
1416 top.origin_type = origin_type;
1417 top.name = name;
1418 top.path = NULL;
1419 top.die_on_error = 0;
1420 top.do_fgetc = config_buf_fgetc;
1421 top.do_ungetc = config_buf_ungetc;
1422 top.do_ftell = config_buf_ftell;
1423
1424 return do_config_from(&top, fn, data);
1425 }
1426
1427 int git_config_from_blob_sha1(config_fn_t fn,
1428 const char *name,
1429 const unsigned char *sha1,
1430 void *data)
1431 {
1432 enum object_type type;
1433 char *buf;
1434 unsigned long size;
1435 int ret;
1436
1437 buf = read_sha1_file(sha1, &type, &size);
1438 if (!buf)
1439 return error("unable to load config blob object '%s'", name);
1440 if (type != OBJ_BLOB) {
1441 free(buf);
1442 return error("reference '%s' does not point to a blob", name);
1443 }
1444
1445 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1446 free(buf);
1447
1448 return ret;
1449 }
1450
1451 static int git_config_from_blob_ref(config_fn_t fn,
1452 const char *name,
1453 void *data)
1454 {
1455 unsigned char sha1[20];
1456
1457 if (get_sha1(name, sha1) < 0)
1458 return error("unable to resolve config blob '%s'", name);
1459 return git_config_from_blob_sha1(fn, name, sha1, data);
1460 }
1461
1462 const char *git_etc_gitconfig(void)
1463 {
1464 static const char *system_wide;
1465 if (!system_wide)
1466 system_wide = system_path(ETC_GITCONFIG);
1467 return system_wide;
1468 }
1469
1470 /*
1471 * Parse environment variable 'k' as a boolean (in various
1472 * possible spellings); if missing, use the default value 'def'.
1473 */
1474 int git_env_bool(const char *k, int def)
1475 {
1476 const char *v = getenv(k);
1477 return v ? git_config_bool(k, v) : def;
1478 }
1479
1480 /*
1481 * Parse environment variable 'k' as ulong with possibly a unit
1482 * suffix; if missing, use the default value 'val'.
1483 */
1484 unsigned long git_env_ulong(const char *k, unsigned long val)
1485 {
1486 const char *v = getenv(k);
1487 if (v && !git_parse_ulong(v, &val))
1488 die("failed to parse %s", k);
1489 return val;
1490 }
1491
1492 int git_config_system(void)
1493 {
1494 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1495 }
1496
1497 static int do_git_config_sequence(config_fn_t fn, void *data)
1498 {
1499 int ret = 0;
1500 char *xdg_config = xdg_config_home("config");
1501 char *user_config = expand_user_path("~/.gitconfig");
1502 char *repo_config = have_git_dir() ? git_pathdup("config") : NULL;
1503
1504 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1505 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1506 ret += git_config_from_file(fn, git_etc_gitconfig(),
1507 data);
1508
1509 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1510 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1511 ret += git_config_from_file(fn, xdg_config, data);
1512
1513 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1514 ret += git_config_from_file(fn, user_config, data);
1515
1516 current_parsing_scope = CONFIG_SCOPE_REPO;
1517 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1518 ret += git_config_from_file(fn, repo_config, data);
1519
1520 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1521 if (git_config_from_parameters(fn, data) < 0)
1522 die(_("unable to parse command-line config"));
1523
1524 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1525 free(xdg_config);
1526 free(user_config);
1527 free(repo_config);
1528 return ret;
1529 }
1530
1531 int git_config_with_options(config_fn_t fn, void *data,
1532 struct git_config_source *config_source,
1533 int respect_includes)
1534 {
1535 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1536
1537 if (respect_includes) {
1538 inc.fn = fn;
1539 inc.data = data;
1540 fn = git_config_include;
1541 data = &inc;
1542 }
1543
1544 /*
1545 * If we have a specific filename, use it. Otherwise, follow the
1546 * regular lookup sequence.
1547 */
1548 if (config_source && config_source->use_stdin)
1549 return git_config_from_stdin(fn, data);
1550 else if (config_source && config_source->file)
1551 return git_config_from_file(fn, config_source->file, data);
1552 else if (config_source && config_source->blob)
1553 return git_config_from_blob_ref(fn, config_source->blob, data);
1554
1555 return do_git_config_sequence(fn, data);
1556 }
1557
1558 static void git_config_raw(config_fn_t fn, void *data)
1559 {
1560 if (git_config_with_options(fn, data, NULL, 1) < 0)
1561 /*
1562 * git_config_with_options() normally returns only
1563 * zero, as most errors are fatal, and
1564 * non-fatal potential errors are guarded by "if"
1565 * statements that are entered only when no error is
1566 * possible.
1567 *
1568 * If we ever encounter a non-fatal error, it means
1569 * something went really wrong and we should stop
1570 * immediately.
1571 */
1572 die(_("unknown error occurred while reading the configuration files"));
1573 }
1574
1575 static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1576 {
1577 int i, value_index;
1578 struct string_list *values;
1579 struct config_set_element *entry;
1580 struct configset_list *list = &cs->list;
1581
1582 for (i = 0; i < list->nr; i++) {
1583 entry = list->items[i].e;
1584 value_index = list->items[i].value_index;
1585 values = &entry->value_list;
1586
1587 current_config_kvi = values->items[value_index].util;
1588
1589 if (fn(entry->key, values->items[value_index].string, data) < 0)
1590 git_die_config_linenr(entry->key,
1591 current_config_kvi->filename,
1592 current_config_kvi->linenr);
1593
1594 current_config_kvi = NULL;
1595 }
1596 }
1597
1598 void read_early_config(config_fn_t cb, void *data)
1599 {
1600 struct strbuf buf = STRBUF_INIT;
1601
1602 git_config_with_options(cb, data, NULL, 1);
1603
1604 /*
1605 * When setup_git_directory() was not yet asked to discover the
1606 * GIT_DIR, we ask discover_git_directory() to figure out whether there
1607 * is any repository config we should use (but unlike
1608 * setup_git_directory_gently(), no global state is changed, most
1609 * notably, the current working directory is still the same after the
1610 * call).
1611 */
1612 if (!have_git_dir() && discover_git_directory(&buf)) {
1613 struct git_config_source repo_config;
1614
1615 memset(&repo_config, 0, sizeof(repo_config));
1616 strbuf_addstr(&buf, "/config");
1617 repo_config.file = buf.buf;
1618 git_config_with_options(cb, data, &repo_config, 1);
1619 }
1620 strbuf_release(&buf);
1621 }
1622
1623 static void git_config_check_init(void);
1624
1625 void git_config(config_fn_t fn, void *data)
1626 {
1627 git_config_check_init();
1628 configset_iter(&the_config_set, fn, data);
1629 }
1630
1631 static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1632 {
1633 struct config_set_element k;
1634 struct config_set_element *found_entry;
1635 char *normalized_key;
1636 /*
1637 * `key` may come from the user, so normalize it before using it
1638 * for querying entries from the hashmap.
1639 */
1640 if (git_config_parse_key(key, &normalized_key, NULL))
1641 return NULL;
1642
1643 hashmap_entry_init(&k, strhash(normalized_key));
1644 k.key = normalized_key;
1645 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1646 free(normalized_key);
1647 return found_entry;
1648 }
1649
1650 static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1651 {
1652 struct config_set_element *e;
1653 struct string_list_item *si;
1654 struct configset_list_item *l_item;
1655 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1656
1657 e = configset_find_element(cs, key);
1658 /*
1659 * Since the keys are being fed by git_config*() callback mechanism, they
1660 * are already normalized. So simply add them without any further munging.
1661 */
1662 if (!e) {
1663 e = xmalloc(sizeof(*e));
1664 hashmap_entry_init(e, strhash(key));
1665 e->key = xstrdup(key);
1666 string_list_init(&e->value_list, 1);
1667 hashmap_add(&cs->config_hash, e);
1668 }
1669 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1670
1671 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1672 l_item = &cs->list.items[cs->list.nr++];
1673 l_item->e = e;
1674 l_item->value_index = e->value_list.nr - 1;
1675
1676 if (!cf)
1677 die("BUG: configset_add_value has no source");
1678 if (cf->name) {
1679 kv_info->filename = strintern(cf->name);
1680 kv_info->linenr = cf->linenr;
1681 kv_info->origin_type = cf->origin_type;
1682 } else {
1683 /* for values read from `git_config_from_parameters()` */
1684 kv_info->filename = NULL;
1685 kv_info->linenr = -1;
1686 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1687 }
1688 kv_info->scope = current_parsing_scope;
1689 si->util = kv_info;
1690
1691 return 0;
1692 }
1693
1694 static int config_set_element_cmp(const struct config_set_element *e1,
1695 const struct config_set_element *e2, const void *unused)
1696 {
1697 return strcmp(e1->key, e2->key);
1698 }
1699
1700 void git_configset_init(struct config_set *cs)
1701 {
1702 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1703 cs->hash_initialized = 1;
1704 cs->list.nr = 0;
1705 cs->list.alloc = 0;
1706 cs->list.items = NULL;
1707 }
1708
1709 void git_configset_clear(struct config_set *cs)
1710 {
1711 struct config_set_element *entry;
1712 struct hashmap_iter iter;
1713 if (!cs->hash_initialized)
1714 return;
1715
1716 hashmap_iter_init(&cs->config_hash, &iter);
1717 while ((entry = hashmap_iter_next(&iter))) {
1718 free(entry->key);
1719 string_list_clear(&entry->value_list, 1);
1720 }
1721 hashmap_free(&cs->config_hash, 1);
1722 cs->hash_initialized = 0;
1723 free(cs->list.items);
1724 cs->list.nr = 0;
1725 cs->list.alloc = 0;
1726 cs->list.items = NULL;
1727 }
1728
1729 static int config_set_callback(const char *key, const char *value, void *cb)
1730 {
1731 struct config_set *cs = cb;
1732 configset_add_value(cs, key, value);
1733 return 0;
1734 }
1735
1736 int git_configset_add_file(struct config_set *cs, const char *filename)
1737 {
1738 return git_config_from_file(config_set_callback, filename, cs);
1739 }
1740
1741 int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1742 {
1743 const struct string_list *values = NULL;
1744 /*
1745 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1746 * queried key in the files of the configset, the value returned will be the last
1747 * value in the value list for that key.
1748 */
1749 values = git_configset_get_value_multi(cs, key);
1750
1751 if (!values)
1752 return 1;
1753 assert(values->nr > 0);
1754 *value = values->items[values->nr - 1].string;
1755 return 0;
1756 }
1757
1758 const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1759 {
1760 struct config_set_element *e = configset_find_element(cs, key);
1761 return e ? &e->value_list : NULL;
1762 }
1763
1764 int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1765 {
1766 const char *value;
1767 if (!git_configset_get_value(cs, key, &value))
1768 return git_config_string(dest, key, value);
1769 else
1770 return 1;
1771 }
1772
1773 int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1774 {
1775 return git_configset_get_string_const(cs, key, (const char **)dest);
1776 }
1777
1778 int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1779 {
1780 const char *value;
1781 if (!git_configset_get_value(cs, key, &value)) {
1782 *dest = git_config_int(key, value);
1783 return 0;
1784 } else
1785 return 1;
1786 }
1787
1788 int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1789 {
1790 const char *value;
1791 if (!git_configset_get_value(cs, key, &value)) {
1792 *dest = git_config_ulong(key, value);
1793 return 0;
1794 } else
1795 return 1;
1796 }
1797
1798 int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1799 {
1800 const char *value;
1801 if (!git_configset_get_value(cs, key, &value)) {
1802 *dest = git_config_bool(key, value);
1803 return 0;
1804 } else
1805 return 1;
1806 }
1807
1808 int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1809 int *is_bool, int *dest)
1810 {
1811 const char *value;
1812 if (!git_configset_get_value(cs, key, &value)) {
1813 *dest = git_config_bool_or_int(key, value, is_bool);
1814 return 0;
1815 } else
1816 return 1;
1817 }
1818
1819 int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1820 {
1821 const char *value;
1822 if (!git_configset_get_value(cs, key, &value)) {
1823 *dest = git_config_maybe_bool(key, value);
1824 if (*dest == -1)
1825 return -1;
1826 return 0;
1827 } else
1828 return 1;
1829 }
1830
1831 int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1832 {
1833 const char *value;
1834 if (!git_configset_get_value(cs, key, &value))
1835 return git_config_pathname(dest, key, value);
1836 else
1837 return 1;
1838 }
1839
1840 static void git_config_check_init(void)
1841 {
1842 if (the_config_set.hash_initialized)
1843 return;
1844 git_configset_init(&the_config_set);
1845 git_config_raw(config_set_callback, &the_config_set);
1846 }
1847
1848 void git_config_clear(void)
1849 {
1850 if (!the_config_set.hash_initialized)
1851 return;
1852 git_configset_clear(&the_config_set);
1853 }
1854
1855 int git_config_get_value(const char *key, const char **value)
1856 {
1857 git_config_check_init();
1858 return git_configset_get_value(&the_config_set, key, value);
1859 }
1860
1861 const struct string_list *git_config_get_value_multi(const char *key)
1862 {
1863 git_config_check_init();
1864 return git_configset_get_value_multi(&the_config_set, key);
1865 }
1866
1867 int git_config_get_string_const(const char *key, const char **dest)
1868 {
1869 int ret;
1870 git_config_check_init();
1871 ret = git_configset_get_string_const(&the_config_set, key, dest);
1872 if (ret < 0)
1873 git_die_config(key, NULL);
1874 return ret;
1875 }
1876
1877 int git_config_get_string(const char *key, char **dest)
1878 {
1879 git_config_check_init();
1880 return git_config_get_string_const(key, (const char **)dest);
1881 }
1882
1883 int git_config_get_int(const char *key, int *dest)
1884 {
1885 git_config_check_init();
1886 return git_configset_get_int(&the_config_set, key, dest);
1887 }
1888
1889 int git_config_get_ulong(const char *key, unsigned long *dest)
1890 {
1891 git_config_check_init();
1892 return git_configset_get_ulong(&the_config_set, key, dest);
1893 }
1894
1895 int git_config_get_bool(const char *key, int *dest)
1896 {
1897 git_config_check_init();
1898 return git_configset_get_bool(&the_config_set, key, dest);
1899 }
1900
1901 int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1902 {
1903 git_config_check_init();
1904 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1905 }
1906
1907 int git_config_get_maybe_bool(const char *key, int *dest)
1908 {
1909 git_config_check_init();
1910 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1911 }
1912
1913 int git_config_get_pathname(const char *key, const char **dest)
1914 {
1915 int ret;
1916 git_config_check_init();
1917 ret = git_configset_get_pathname(&the_config_set, key, dest);
1918 if (ret < 0)
1919 git_die_config(key, NULL);
1920 return ret;
1921 }
1922
1923 int git_config_get_expiry(const char *key, const char **output)
1924 {
1925 int ret = git_config_get_string_const(key, output);
1926 if (ret)
1927 return ret;
1928 if (strcmp(*output, "now")) {
1929 unsigned long now = approxidate("now");
1930 if (approxidate(*output) >= now)
1931 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
1932 }
1933 return ret;
1934 }
1935
1936 int git_config_get_untracked_cache(void)
1937 {
1938 int val = -1;
1939 const char *v;
1940
1941 /* Hack for test programs like test-dump-untracked-cache */
1942 if (ignore_untracked_cache_config)
1943 return -1;
1944
1945 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1946 return val;
1947
1948 if (!git_config_get_value("core.untrackedcache", &v)) {
1949 if (!strcasecmp(v, "keep"))
1950 return -1;
1951
1952 error(_("unknown core.untrackedCache value '%s'; "
1953 "using 'keep' default value"), v);
1954 return -1;
1955 }
1956
1957 return -1; /* default value */
1958 }
1959
1960 int git_config_get_split_index(void)
1961 {
1962 int val;
1963
1964 if (!git_config_get_maybe_bool("core.splitindex", &val))
1965 return val;
1966
1967 return -1; /* default value */
1968 }
1969
1970 int git_config_get_max_percent_split_change(void)
1971 {
1972 int val = -1;
1973
1974 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
1975 if (0 <= val && val <= 100)
1976 return val;
1977
1978 return error(_("splitIndex.maxPercentChange value '%d' "
1979 "should be between 0 and 100"), val);
1980 }
1981
1982 return -1; /* default value */
1983 }
1984
1985 NORETURN
1986 void git_die_config_linenr(const char *key, const char *filename, int linenr)
1987 {
1988 if (!filename)
1989 die(_("unable to parse '%s' from command-line config"), key);
1990 else
1991 die(_("bad config variable '%s' in file '%s' at line %d"),
1992 key, filename, linenr);
1993 }
1994
1995 NORETURN __attribute__((format(printf, 2, 3)))
1996 void git_die_config(const char *key, const char *err, ...)
1997 {
1998 const struct string_list *values;
1999 struct key_value_info *kv_info;
2000
2001 if (err) {
2002 va_list params;
2003 va_start(params, err);
2004 vreportf("error: ", err, params);
2005 va_end(params);
2006 }
2007 values = git_config_get_value_multi(key);
2008 kv_info = values->items[values->nr - 1].util;
2009 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2010 }
2011
2012 /*
2013 * Find all the stuff for git_config_set() below.
2014 */
2015
2016 static struct {
2017 int baselen;
2018 char *key;
2019 int do_not_match;
2020 regex_t *value_regex;
2021 int multi_replace;
2022 size_t *offset;
2023 unsigned int offset_alloc;
2024 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
2025 int seen;
2026 } store;
2027
2028 static int matches(const char *key, const char *value)
2029 {
2030 if (strcmp(key, store.key))
2031 return 0; /* not ours */
2032 if (!store.value_regex)
2033 return 1; /* always matches */
2034 if (store.value_regex == CONFIG_REGEX_NONE)
2035 return 0; /* never matches */
2036
2037 return store.do_not_match ^
2038 (value && !regexec(store.value_regex, value, 0, NULL, 0));
2039 }
2040
2041 static int store_aux(const char *key, const char *value, void *cb)
2042 {
2043 const char *ep;
2044 size_t section_len;
2045
2046 switch (store.state) {
2047 case KEY_SEEN:
2048 if (matches(key, value)) {
2049 if (store.seen == 1 && store.multi_replace == 0) {
2050 warning(_("%s has multiple values"), key);
2051 }
2052
2053 ALLOC_GROW(store.offset, store.seen + 1,
2054 store.offset_alloc);
2055
2056 store.offset[store.seen] = cf->do_ftell(cf);
2057 store.seen++;
2058 }
2059 break;
2060 case SECTION_SEEN:
2061 /*
2062 * What we are looking for is in store.key (both
2063 * section and var), and its section part is baselen
2064 * long. We found key (again, both section and var).
2065 * We would want to know if this key is in the same
2066 * section as what we are looking for. We already
2067 * know we are in the same section as what should
2068 * hold store.key.
2069 */
2070 ep = strrchr(key, '.');
2071 section_len = ep - key;
2072
2073 if ((section_len != store.baselen) ||
2074 memcmp(key, store.key, section_len+1)) {
2075 store.state = SECTION_END_SEEN;
2076 break;
2077 }
2078
2079 /*
2080 * Do not increment matches: this is no match, but we
2081 * just made sure we are in the desired section.
2082 */
2083 ALLOC_GROW(store.offset, store.seen + 1,
2084 store.offset_alloc);
2085 store.offset[store.seen] = cf->do_ftell(cf);
2086 /* fallthru */
2087 case SECTION_END_SEEN:
2088 case START:
2089 if (matches(key, value)) {
2090 ALLOC_GROW(store.offset, store.seen + 1,
2091 store.offset_alloc);
2092 store.offset[store.seen] = cf->do_ftell(cf);
2093 store.state = KEY_SEEN;
2094 store.seen++;
2095 } else {
2096 if (strrchr(key, '.') - key == store.baselen &&
2097 !strncmp(key, store.key, store.baselen)) {
2098 store.state = SECTION_SEEN;
2099 ALLOC_GROW(store.offset,
2100 store.seen + 1,
2101 store.offset_alloc);
2102 store.offset[store.seen] = cf->do_ftell(cf);
2103 }
2104 }
2105 }
2106 return 0;
2107 }
2108
2109 static int write_error(const char *filename)
2110 {
2111 error("failed to write new configuration file %s", filename);
2112
2113 /* Same error code as "failed to rename". */
2114 return 4;
2115 }
2116
2117 static int store_write_section(int fd, const char *key)
2118 {
2119 const char *dot;
2120 int i, success;
2121 struct strbuf sb = STRBUF_INIT;
2122
2123 dot = memchr(key, '.', store.baselen);
2124 if (dot) {
2125 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2126 for (i = dot - key + 1; i < store.baselen; i++) {
2127 if (key[i] == '"' || key[i] == '\\')
2128 strbuf_addch(&sb, '\\');
2129 strbuf_addch(&sb, key[i]);
2130 }
2131 strbuf_addstr(&sb, "\"]\n");
2132 } else {
2133 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
2134 }
2135
2136 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2137 strbuf_release(&sb);
2138
2139 return success;
2140 }
2141
2142 static int store_write_pair(int fd, const char *key, const char *value)
2143 {
2144 int i, success;
2145 int length = strlen(key + store.baselen + 1);
2146 const char *quote = "";
2147 struct strbuf sb = STRBUF_INIT;
2148
2149 /*
2150 * Check to see if the value needs to be surrounded with a dq pair.
2151 * Note that problematic characters are always backslash-quoted; this
2152 * check is about not losing leading or trailing SP and strings that
2153 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2154 * configuration parser.
2155 */
2156 if (value[0] == ' ')
2157 quote = "\"";
2158 for (i = 0; value[i]; i++)
2159 if (value[i] == ';' || value[i] == '#')
2160 quote = "\"";
2161 if (i && value[i - 1] == ' ')
2162 quote = "\"";
2163
2164 strbuf_addf(&sb, "\t%.*s = %s",
2165 length, key + store.baselen + 1, quote);
2166
2167 for (i = 0; value[i]; i++)
2168 switch (value[i]) {
2169 case '\n':
2170 strbuf_addstr(&sb, "\\n");
2171 break;
2172 case '\t':
2173 strbuf_addstr(&sb, "\\t");
2174 break;
2175 case '"':
2176 case '\\':
2177 strbuf_addch(&sb, '\\');
2178 default:
2179 strbuf_addch(&sb, value[i]);
2180 break;
2181 }
2182 strbuf_addf(&sb, "%s\n", quote);
2183
2184 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2185 strbuf_release(&sb);
2186
2187 return success;
2188 }
2189
2190 static ssize_t find_beginning_of_line(const char *contents, size_t size,
2191 size_t offset_, int *found_bracket)
2192 {
2193 size_t equal_offset = size, bracket_offset = size;
2194 ssize_t offset;
2195
2196 contline:
2197 for (offset = offset_-2; offset > 0
2198 && contents[offset] != '\n'; offset--)
2199 switch (contents[offset]) {
2200 case '=': equal_offset = offset; break;
2201 case ']': bracket_offset = offset; break;
2202 }
2203 if (offset > 0 && contents[offset-1] == '\\') {
2204 offset_ = offset;
2205 goto contline;
2206 }
2207 if (bracket_offset < equal_offset) {
2208 *found_bracket = 1;
2209 offset = bracket_offset+1;
2210 } else
2211 offset++;
2212
2213 return offset;
2214 }
2215
2216 int git_config_set_in_file_gently(const char *config_filename,
2217 const char *key, const char *value)
2218 {
2219 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2220 }
2221
2222 void git_config_set_in_file(const char *config_filename,
2223 const char *key, const char *value)
2224 {
2225 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2226 }
2227
2228 int git_config_set_gently(const char *key, const char *value)
2229 {
2230 return git_config_set_multivar_gently(key, value, NULL, 0);
2231 }
2232
2233 void git_config_set(const char *key, const char *value)
2234 {
2235 git_config_set_multivar(key, value, NULL, 0);
2236 }
2237
2238 /*
2239 * If value==NULL, unset in (remove from) config,
2240 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2241 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2242 * (only add a new one)
2243 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2244 * else all matching key/values (regardless how many) are removed,
2245 * before the new pair is written.
2246 *
2247 * Returns 0 on success.
2248 *
2249 * This function does this:
2250 *
2251 * - it locks the config file by creating ".git/config.lock"
2252 *
2253 * - it then parses the config using store_aux() as validator to find
2254 * the position on the key/value pair to replace. If it is to be unset,
2255 * it must be found exactly once.
2256 *
2257 * - the config file is mmap()ed and the part before the match (if any) is
2258 * written to the lock file, then the changed part and the rest.
2259 *
2260 * - the config file is removed and the lock file rename()d to it.
2261 *
2262 */
2263 int git_config_set_multivar_in_file_gently(const char *config_filename,
2264 const char *key, const char *value,
2265 const char *value_regex,
2266 int multi_replace)
2267 {
2268 int fd = -1, in_fd = -1;
2269 int ret;
2270 struct lock_file *lock = NULL;
2271 char *filename_buf = NULL;
2272 char *contents = NULL;
2273 size_t contents_sz;
2274
2275 /* parse-key returns negative; flip the sign to feed exit(3) */
2276 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2277 if (ret)
2278 goto out_free;
2279
2280 store.multi_replace = multi_replace;
2281
2282 if (!config_filename)
2283 config_filename = filename_buf = git_pathdup("config");
2284
2285 /*
2286 * The lock serves a purpose in addition to locking: the new
2287 * contents of .git/config will be written into it.
2288 */
2289 lock = xcalloc(1, sizeof(struct lock_file));
2290 fd = hold_lock_file_for_update(lock, config_filename, 0);
2291 if (fd < 0) {
2292 error_errno("could not lock config file %s", config_filename);
2293 free(store.key);
2294 ret = CONFIG_NO_LOCK;
2295 goto out_free;
2296 }
2297
2298 /*
2299 * If .git/config does not exist yet, write a minimal version.
2300 */
2301 in_fd = open(config_filename, O_RDONLY);
2302 if ( in_fd < 0 ) {
2303 free(store.key);
2304
2305 if ( ENOENT != errno ) {
2306 error_errno("opening %s", config_filename);
2307 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2308 goto out_free;
2309 }
2310 /* if nothing to unset, error out */
2311 if (value == NULL) {
2312 ret = CONFIG_NOTHING_SET;
2313 goto out_free;
2314 }
2315
2316 store.key = (char *)key;
2317 if (!store_write_section(fd, key) ||
2318 !store_write_pair(fd, key, value))
2319 goto write_err_out;
2320 } else {
2321 struct stat st;
2322 size_t copy_begin, copy_end;
2323 int i, new_line = 0;
2324
2325 if (value_regex == NULL)
2326 store.value_regex = NULL;
2327 else if (value_regex == CONFIG_REGEX_NONE)
2328 store.value_regex = CONFIG_REGEX_NONE;
2329 else {
2330 if (value_regex[0] == '!') {
2331 store.do_not_match = 1;
2332 value_regex++;
2333 } else
2334 store.do_not_match = 0;
2335
2336 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2337 if (regcomp(store.value_regex, value_regex,
2338 REG_EXTENDED)) {
2339 error("invalid pattern: %s", value_regex);
2340 free(store.value_regex);
2341 ret = CONFIG_INVALID_PATTERN;
2342 goto out_free;
2343 }
2344 }
2345
2346 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2347 store.offset[0] = 0;
2348 store.state = START;
2349 store.seen = 0;
2350
2351 /*
2352 * After this, store.offset will contain the *end* offset
2353 * of the last match, or remain at 0 if no match was found.
2354 * As a side effect, we make sure to transform only a valid
2355 * existing config file.
2356 */
2357 if (git_config_from_file(store_aux, config_filename, NULL)) {
2358 error("invalid config file %s", config_filename);
2359 free(store.key);
2360 if (store.value_regex != NULL &&
2361 store.value_regex != CONFIG_REGEX_NONE) {
2362 regfree(store.value_regex);
2363 free(store.value_regex);
2364 }
2365 ret = CONFIG_INVALID_FILE;
2366 goto out_free;
2367 }
2368
2369 free(store.key);
2370 if (store.value_regex != NULL &&
2371 store.value_regex != CONFIG_REGEX_NONE) {
2372 regfree(store.value_regex);
2373 free(store.value_regex);
2374 }
2375
2376 /* if nothing to unset, or too many matches, error out */
2377 if ((store.seen == 0 && value == NULL) ||
2378 (store.seen > 1 && multi_replace == 0)) {
2379 ret = CONFIG_NOTHING_SET;
2380 goto out_free;
2381 }
2382
2383 if (fstat(in_fd, &st) == -1) {
2384 error_errno(_("fstat on %s failed"), config_filename);
2385 ret = CONFIG_INVALID_FILE;
2386 goto out_free;
2387 }
2388
2389 contents_sz = xsize_t(st.st_size);
2390 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2391 MAP_PRIVATE, in_fd, 0);
2392 if (contents == MAP_FAILED) {
2393 if (errno == ENODEV && S_ISDIR(st.st_mode))
2394 errno = EISDIR;
2395 error_errno("unable to mmap '%s'", config_filename);
2396 ret = CONFIG_INVALID_FILE;
2397 contents = NULL;
2398 goto out_free;
2399 }
2400 close(in_fd);
2401 in_fd = -1;
2402
2403 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2404 error_errno("chmod on %s failed", get_lock_file_path(lock));
2405 ret = CONFIG_NO_WRITE;
2406 goto out_free;
2407 }
2408
2409 if (store.seen == 0)
2410 store.seen = 1;
2411
2412 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2413 if (store.offset[i] == 0) {
2414 store.offset[i] = copy_end = contents_sz;
2415 } else if (store.state != KEY_SEEN) {
2416 copy_end = store.offset[i];
2417 } else
2418 copy_end = find_beginning_of_line(
2419 contents, contents_sz,
2420 store.offset[i]-2, &new_line);
2421
2422 if (copy_end > 0 && contents[copy_end-1] != '\n')
2423 new_line = 1;
2424
2425 /* write the first part of the config */
2426 if (copy_end > copy_begin) {
2427 if (write_in_full(fd, contents + copy_begin,
2428 copy_end - copy_begin) <
2429 copy_end - copy_begin)
2430 goto write_err_out;
2431 if (new_line &&
2432 write_str_in_full(fd, "\n") != 1)
2433 goto write_err_out;
2434 }
2435 copy_begin = store.offset[i];
2436 }
2437
2438 /* write the pair (value == NULL means unset) */
2439 if (value != NULL) {
2440 if (store.state == START) {
2441 if (!store_write_section(fd, key))
2442 goto write_err_out;
2443 }
2444 if (!store_write_pair(fd, key, value))
2445 goto write_err_out;
2446 }
2447
2448 /* write the rest of the config */
2449 if (copy_begin < contents_sz)
2450 if (write_in_full(fd, contents + copy_begin,
2451 contents_sz - copy_begin) <
2452 contents_sz - copy_begin)
2453 goto write_err_out;
2454
2455 munmap(contents, contents_sz);
2456 contents = NULL;
2457 }
2458
2459 if (commit_lock_file(lock) < 0) {
2460 error_errno("could not write config file %s", config_filename);
2461 ret = CONFIG_NO_WRITE;
2462 lock = NULL;
2463 goto out_free;
2464 }
2465
2466 /*
2467 * lock is committed, so don't try to roll it back below.
2468 * NOTE: Since lockfile.c keeps a linked list of all created
2469 * lock_file structures, it isn't safe to free(lock). It's
2470 * better to just leave it hanging around.
2471 */
2472 lock = NULL;
2473 ret = 0;
2474
2475 /* Invalidate the config cache */
2476 git_config_clear();
2477
2478 out_free:
2479 if (lock)
2480 rollback_lock_file(lock);
2481 free(filename_buf);
2482 if (contents)
2483 munmap(contents, contents_sz);
2484 if (in_fd >= 0)
2485 close(in_fd);
2486 return ret;
2487
2488 write_err_out:
2489 ret = write_error(get_lock_file_path(lock));
2490 goto out_free;
2491
2492 }
2493
2494 void git_config_set_multivar_in_file(const char *config_filename,
2495 const char *key, const char *value,
2496 const char *value_regex, int multi_replace)
2497 {
2498 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2499 value_regex, multi_replace))
2500 return;
2501 if (value)
2502 die(_("could not set '%s' to '%s'"), key, value);
2503 else
2504 die(_("could not unset '%s'"), key);
2505 }
2506
2507 int git_config_set_multivar_gently(const char *key, const char *value,
2508 const char *value_regex, int multi_replace)
2509 {
2510 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2511 multi_replace);
2512 }
2513
2514 void git_config_set_multivar(const char *key, const char *value,
2515 const char *value_regex, int multi_replace)
2516 {
2517 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2518 multi_replace);
2519 }
2520
2521 static int section_name_match (const char *buf, const char *name)
2522 {
2523 int i = 0, j = 0, dot = 0;
2524 if (buf[i] != '[')
2525 return 0;
2526 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2527 if (!dot && isspace(buf[i])) {
2528 dot = 1;
2529 if (name[j++] != '.')
2530 break;
2531 for (i++; isspace(buf[i]); i++)
2532 ; /* do nothing */
2533 if (buf[i] != '"')
2534 break;
2535 continue;
2536 }
2537 if (buf[i] == '\\' && dot)
2538 i++;
2539 else if (buf[i] == '"' && dot) {
2540 for (i++; isspace(buf[i]); i++)
2541 ; /* do_nothing */
2542 break;
2543 }
2544 if (buf[i] != name[j++])
2545 break;
2546 }
2547 if (buf[i] == ']' && name[j] == 0) {
2548 /*
2549 * We match, now just find the right length offset by
2550 * gobbling up any whitespace after it, as well
2551 */
2552 i++;
2553 for (; buf[i] && isspace(buf[i]); i++)
2554 ; /* do nothing */
2555 return i;
2556 }
2557 return 0;
2558 }
2559
2560 static int section_name_is_ok(const char *name)
2561 {
2562 /* Empty section names are bogus. */
2563 if (!*name)
2564 return 0;
2565
2566 /*
2567 * Before a dot, we must be alphanumeric or dash. After the first dot,
2568 * anything goes, so we can stop checking.
2569 */
2570 for (; *name && *name != '.'; name++)
2571 if (*name != '-' && !isalnum(*name))
2572 return 0;
2573 return 1;
2574 }
2575
2576 /* if new_name == NULL, the section is removed instead */
2577 int git_config_rename_section_in_file(const char *config_filename,
2578 const char *old_name, const char *new_name)
2579 {
2580 int ret = 0, remove = 0;
2581 char *filename_buf = NULL;
2582 struct lock_file *lock;
2583 int out_fd;
2584 char buf[1024];
2585 FILE *config_file;
2586 struct stat st;
2587
2588 if (new_name && !section_name_is_ok(new_name)) {
2589 ret = error("invalid section name: %s", new_name);
2590 goto out_no_rollback;
2591 }
2592
2593 if (!config_filename)
2594 config_filename = filename_buf = git_pathdup("config");
2595
2596 lock = xcalloc(1, sizeof(struct lock_file));
2597 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2598 if (out_fd < 0) {
2599 ret = error("could not lock config file %s", config_filename);
2600 goto out;
2601 }
2602
2603 if (!(config_file = fopen(config_filename, "rb"))) {
2604 /* no config file means nothing to rename, no error */
2605 goto commit_and_out;
2606 }
2607
2608 if (fstat(fileno(config_file), &st) == -1) {
2609 ret = error_errno(_("fstat on %s failed"), config_filename);
2610 goto out;
2611 }
2612
2613 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2614 ret = error_errno("chmod on %s failed",
2615 get_lock_file_path(lock));
2616 goto out;
2617 }
2618
2619 while (fgets(buf, sizeof(buf), config_file)) {
2620 int i;
2621 int length;
2622 char *output = buf;
2623 for (i = 0; buf[i] && isspace(buf[i]); i++)
2624 ; /* do nothing */
2625 if (buf[i] == '[') {
2626 /* it's a section */
2627 int offset = section_name_match(&buf[i], old_name);
2628 if (offset > 0) {
2629 ret++;
2630 if (new_name == NULL) {
2631 remove = 1;
2632 continue;
2633 }
2634 store.baselen = strlen(new_name);
2635 if (!store_write_section(out_fd, new_name)) {
2636 ret = write_error(get_lock_file_path(lock));
2637 goto out;
2638 }
2639 /*
2640 * We wrote out the new section, with
2641 * a newline, now skip the old
2642 * section's length
2643 */
2644 output += offset + i;
2645 if (strlen(output) > 0) {
2646 /*
2647 * More content means there's
2648 * a declaration to put on the
2649 * next line; indent with a
2650 * tab
2651 */
2652 output -= 1;
2653 output[0] = '\t';
2654 }
2655 }
2656 remove = 0;
2657 }
2658 if (remove)
2659 continue;
2660 length = strlen(output);
2661 if (write_in_full(out_fd, output, length) != length) {
2662 ret = write_error(get_lock_file_path(lock));
2663 goto out;
2664 }
2665 }
2666 fclose(config_file);
2667 commit_and_out:
2668 if (commit_lock_file(lock) < 0)
2669 ret = error_errno("could not write config file %s",
2670 config_filename);
2671 out:
2672 rollback_lock_file(lock);
2673 out_no_rollback:
2674 free(filename_buf);
2675 return ret;
2676 }
2677
2678 int git_config_rename_section(const char *old_name, const char *new_name)
2679 {
2680 return git_config_rename_section_in_file(NULL, old_name, new_name);
2681 }
2682
2683 /*
2684 * Call this to report error for your variable that should not
2685 * get a boolean value (i.e. "[my] var" means "true").
2686 */
2687 #undef config_error_nonbool
2688 int config_error_nonbool(const char *var)
2689 {
2690 return error("missing value for '%s'", var);
2691 }
2692
2693 int parse_config_key(const char *var,
2694 const char *section,
2695 const char **subsection, int *subsection_len,
2696 const char **key)
2697 {
2698 const char *dot;
2699
2700 /* Does it start with "section." ? */
2701 if (!skip_prefix(var, section, &var) || *var != '.')
2702 return -1;
2703
2704 /*
2705 * Find the key; we don't know yet if we have a subsection, but we must
2706 * parse backwards from the end, since the subsection may have dots in
2707 * it, too.
2708 */
2709 dot = strrchr(var, '.');
2710 *key = dot + 1;
2711
2712 /* Did we have a subsection at all? */
2713 if (dot == var) {
2714 if (subsection) {
2715 *subsection = NULL;
2716 *subsection_len = 0;
2717 }
2718 }
2719 else {
2720 if (!subsection)
2721 return -1;
2722 *subsection = var + 1;
2723 *subsection_len = dot - *subsection;
2724 }
2725
2726 return 0;
2727 }
2728
2729 const char *current_config_origin_type(void)
2730 {
2731 int type;
2732 if (current_config_kvi)
2733 type = current_config_kvi->origin_type;
2734 else if(cf)
2735 type = cf->origin_type;
2736 else
2737 die("BUG: current_config_origin_type called outside config callback");
2738
2739 switch (type) {
2740 case CONFIG_ORIGIN_BLOB:
2741 return "blob";
2742 case CONFIG_ORIGIN_FILE:
2743 return "file";
2744 case CONFIG_ORIGIN_STDIN:
2745 return "standard input";
2746 case CONFIG_ORIGIN_SUBMODULE_BLOB:
2747 return "submodule-blob";
2748 case CONFIG_ORIGIN_CMDLINE:
2749 return "command line";
2750 default:
2751 die("BUG: unknown config origin type");
2752 }
2753 }
2754
2755 const char *current_config_name(void)
2756 {
2757 const char *name;
2758 if (current_config_kvi)
2759 name = current_config_kvi->filename;
2760 else if (cf)
2761 name = cf->name;
2762 else
2763 die("BUG: current_config_name called outside config callback");
2764 return name ? name : "";
2765 }
2766
2767 enum config_scope current_config_scope(void)
2768 {
2769 if (current_config_kvi)
2770 return current_config_kvi->scope;
2771 else
2772 return current_parsing_scope;
2773 }