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
18struct 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 */
58static struct config_source *cf;
59static 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 */
68static enum config_scope current_parsing_scope;
69
70static int core_compression_seen;
71static int pack_compression_seen;
72static 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 */
79static struct config_set the_config_set;
80
81static int config_file_fgetc(struct config_source *conf)
82{
83 return getc_unlocked(conf->u.file);
84}
85
86static int config_file_ungetc(int c, struct config_source *conf)
87{
88 return ungetc(c, conf->u.file);
89}
90
91static long config_file_ftell(struct config_source *conf)
92{
93 return ftell(conf->u.file);
94}
95
96
97static 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
105static 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
117static long config_buf_ftell(struct config_source *conf)
118{
119 return conf->u.buf.pos;
120}
121
122#define MAX_INCLUDE_DEPTH 10
123static 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?";
129static 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, 0);
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
174static 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, 1);
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_realpath(&path, cf->path, 1);
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
210static int include_by_gitdir(const struct config_options *opts,
211 const char *cond, size_t cond_len, int icase)
212{
213 struct strbuf text = STRBUF_INIT;
214 struct strbuf pattern = STRBUF_INIT;
215 int ret = 0, prefix;
216 const char *git_dir;
217
218 if (opts->git_dir)
219 git_dir = opts->git_dir;
220 else if (have_git_dir())
221 git_dir = get_git_dir();
222 else
223 goto done;
224
225 strbuf_realpath(&text, git_dir, 1);
226 strbuf_add(&pattern, cond, cond_len);
227 prefix = prepare_include_condition_pattern(&pattern);
228
229 if (prefix < 0)
230 goto done;
231
232 if (prefix > 0) {
233 /*
234 * perform literal matching on the prefix part so that
235 * any wildcard character in it can't create side effects.
236 */
237 if (text.len < prefix)
238 goto done;
239 if (!icase && strncmp(pattern.buf, text.buf, prefix))
240 goto done;
241 if (icase && strncasecmp(pattern.buf, text.buf, prefix))
242 goto done;
243 }
244
245 ret = !wildmatch(pattern.buf + prefix, text.buf + prefix,
246 icase ? WM_CASEFOLD : 0, NULL);
247
248done:
249 strbuf_release(&pattern);
250 strbuf_release(&text);
251 return ret;
252}
253
254static int include_condition_is_true(const struct config_options *opts,
255 const char *cond, size_t cond_len)
256{
257
258 if (skip_prefix_mem(cond, cond_len, "gitdir:", &cond, &cond_len))
259 return include_by_gitdir(opts, cond, cond_len, 0);
260 else if (skip_prefix_mem(cond, cond_len, "gitdir/i:", &cond, &cond_len))
261 return include_by_gitdir(opts, cond, cond_len, 1);
262
263 /* unknown conditionals are always false */
264 return 0;
265}
266
267int git_config_include(const char *var, const char *value, void *data)
268{
269 struct config_include_data *inc = data;
270 const char *cond, *key;
271 int cond_len;
272 int ret;
273
274 /*
275 * Pass along all values, including "include" directives; this makes it
276 * possible to query information on the includes themselves.
277 */
278 ret = inc->fn(var, value, inc->data);
279 if (ret < 0)
280 return ret;
281
282 if (!strcmp(var, "include.path"))
283 ret = handle_path_include(value, inc);
284
285 if (!parse_config_key(var, "includeif", &cond, &cond_len, &key) &&
286 (cond && include_condition_is_true(inc->opts, cond, cond_len)) &&
287 !strcmp(key, "path"))
288 ret = handle_path_include(value, inc);
289
290 return ret;
291}
292
293void git_config_push_parameter(const char *text)
294{
295 struct strbuf env = STRBUF_INIT;
296 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
297 if (old && *old) {
298 strbuf_addstr(&env, old);
299 strbuf_addch(&env, ' ');
300 }
301 sq_quote_buf(&env, text);
302 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
303 strbuf_release(&env);
304}
305
306static inline int iskeychar(int c)
307{
308 return isalnum(c) || c == '-';
309}
310
311/*
312 * Auxiliary function to sanity-check and split the key into the section
313 * identifier and variable name.
314 *
315 * Returns 0 on success, -1 when there is an invalid character in the key and
316 * -2 if there is no section name in the key.
317 *
318 * store_key - pointer to char* which will hold a copy of the key with
319 * lowercase section and variable name
320 * baselen - pointer to int which will hold the length of the
321 * section + subsection part, can be NULL
322 */
323static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
324{
325 int i, dot, baselen;
326 const char *last_dot = strrchr(key, '.');
327
328 /*
329 * Since "key" actually contains the section name and the real
330 * key name separated by a dot, we have to know where the dot is.
331 */
332
333 if (last_dot == NULL || last_dot == key) {
334 if (!quiet)
335 error("key does not contain a section: %s", key);
336 return -CONFIG_NO_SECTION_OR_NAME;
337 }
338
339 if (!last_dot[1]) {
340 if (!quiet)
341 error("key does not contain variable name: %s", key);
342 return -CONFIG_NO_SECTION_OR_NAME;
343 }
344
345 baselen = last_dot - key;
346 if (baselen_)
347 *baselen_ = baselen;
348
349 /*
350 * Validate the key and while at it, lower case it for matching.
351 */
352 if (store_key)
353 *store_key = xmallocz(strlen(key));
354
355 dot = 0;
356 for (i = 0; key[i]; i++) {
357 unsigned char c = key[i];
358 if (c == '.')
359 dot = 1;
360 /* Leave the extended basename untouched.. */
361 if (!dot || i > baselen) {
362 if (!iskeychar(c) ||
363 (i == baselen + 1 && !isalpha(c))) {
364 if (!quiet)
365 error("invalid key: %s", key);
366 goto out_free_ret_1;
367 }
368 c = tolower(c);
369 } else if (c == '\n') {
370 if (!quiet)
371 error("invalid key (newline): %s", key);
372 goto out_free_ret_1;
373 }
374 if (store_key)
375 (*store_key)[i] = c;
376 }
377
378 return 0;
379
380out_free_ret_1:
381 if (store_key) {
382 free(*store_key);
383 *store_key = NULL;
384 }
385 return -CONFIG_INVALID_KEY;
386}
387
388int git_config_parse_key(const char *key, char **store_key, int *baselen)
389{
390 return git_config_parse_key_1(key, store_key, baselen, 0);
391}
392
393int git_config_key_is_valid(const char *key)
394{
395 return !git_config_parse_key_1(key, NULL, NULL, 1);
396}
397
398int git_config_parse_parameter(const char *text,
399 config_fn_t fn, void *data)
400{
401 const char *value;
402 char *canonical_name;
403 struct strbuf **pair;
404 int ret;
405
406 pair = strbuf_split_str(text, '=', 2);
407 if (!pair[0])
408 return error("bogus config parameter: %s", text);
409
410 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
411 strbuf_setlen(pair[0], pair[0]->len - 1);
412 value = pair[1] ? pair[1]->buf : "";
413 } else {
414 value = NULL;
415 }
416
417 strbuf_trim(pair[0]);
418 if (!pair[0]->len) {
419 strbuf_list_free(pair);
420 return error("bogus config parameter: %s", text);
421 }
422
423 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
424 ret = -1;
425 } else {
426 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
427 free(canonical_name);
428 }
429 strbuf_list_free(pair);
430 return ret;
431}
432
433int git_config_from_parameters(config_fn_t fn, void *data)
434{
435 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
436 int ret = 0;
437 char *envw;
438 const char **argv = NULL;
439 int nr = 0, alloc = 0;
440 int i;
441 struct config_source source;
442
443 if (!env)
444 return 0;
445
446 memset(&source, 0, sizeof(source));
447 source.prev = cf;
448 source.origin_type = CONFIG_ORIGIN_CMDLINE;
449 cf = &source;
450
451 /* sq_dequote will write over it */
452 envw = xstrdup(env);
453
454 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
455 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
456 goto out;
457 }
458
459 for (i = 0; i < nr; i++) {
460 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
461 ret = -1;
462 goto out;
463 }
464 }
465
466out:
467 free(argv);
468 free(envw);
469 cf = source.prev;
470 return ret;
471}
472
473static int get_next_char(void)
474{
475 int c = cf->do_fgetc(cf);
476
477 if (c == '\r') {
478 /* DOS like systems */
479 c = cf->do_fgetc(cf);
480 if (c != '\n') {
481 if (c != EOF)
482 cf->do_ungetc(c, cf);
483 c = '\r';
484 }
485 }
486 if (c == '\n')
487 cf->linenr++;
488 if (c == EOF) {
489 cf->eof = 1;
490 cf->linenr++;
491 c = '\n';
492 }
493 return c;
494}
495
496static char *parse_value(void)
497{
498 int quote = 0, comment = 0, space = 0;
499
500 strbuf_reset(&cf->value);
501 for (;;) {
502 int c = get_next_char();
503 if (c == '\n') {
504 if (quote) {
505 cf->linenr--;
506 return NULL;
507 }
508 return cf->value.buf;
509 }
510 if (comment)
511 continue;
512 if (isspace(c) && !quote) {
513 if (cf->value.len)
514 space++;
515 continue;
516 }
517 if (!quote) {
518 if (c == ';' || c == '#') {
519 comment = 1;
520 continue;
521 }
522 }
523 for (; space; space--)
524 strbuf_addch(&cf->value, ' ');
525 if (c == '\\') {
526 c = get_next_char();
527 switch (c) {
528 case '\n':
529 continue;
530 case 't':
531 c = '\t';
532 break;
533 case 'b':
534 c = '\b';
535 break;
536 case 'n':
537 c = '\n';
538 break;
539 /* Some characters escape as themselves */
540 case '\\': case '"':
541 break;
542 /* Reject unknown escape sequences */
543 default:
544 return NULL;
545 }
546 strbuf_addch(&cf->value, c);
547 continue;
548 }
549 if (c == '"') {
550 quote = 1-quote;
551 continue;
552 }
553 strbuf_addch(&cf->value, c);
554 }
555}
556
557static int get_value(config_fn_t fn, void *data, struct strbuf *name)
558{
559 int c;
560 char *value;
561 int ret;
562
563 /* Get the full name */
564 for (;;) {
565 c = get_next_char();
566 if (cf->eof)
567 break;
568 if (!iskeychar(c))
569 break;
570 strbuf_addch(name, tolower(c));
571 }
572
573 while (c == ' ' || c == '\t')
574 c = get_next_char();
575
576 value = NULL;
577 if (c != '\n') {
578 if (c != '=')
579 return -1;
580 value = parse_value();
581 if (!value)
582 return -1;
583 }
584 /*
585 * We already consumed the \n, but we need linenr to point to
586 * the line we just parsed during the call to fn to get
587 * accurate line number in error messages.
588 */
589 cf->linenr--;
590 ret = fn(name->buf, value, data);
591 if (ret >= 0)
592 cf->linenr++;
593 return ret;
594}
595
596static int get_extended_base_var(struct strbuf *name, int c)
597{
598 do {
599 if (c == '\n')
600 goto error_incomplete_line;
601 c = get_next_char();
602 } while (isspace(c));
603
604 /* We require the format to be '[base "extension"]' */
605 if (c != '"')
606 return -1;
607 strbuf_addch(name, '.');
608
609 for (;;) {
610 int c = get_next_char();
611 if (c == '\n')
612 goto error_incomplete_line;
613 if (c == '"')
614 break;
615 if (c == '\\') {
616 c = get_next_char();
617 if (c == '\n')
618 goto error_incomplete_line;
619 }
620 strbuf_addch(name, c);
621 }
622
623 /* Final ']' */
624 if (get_next_char() != ']')
625 return -1;
626 return 0;
627error_incomplete_line:
628 cf->linenr--;
629 return -1;
630}
631
632static int get_base_var(struct strbuf *name)
633{
634 for (;;) {
635 int c = get_next_char();
636 if (cf->eof)
637 return -1;
638 if (c == ']')
639 return 0;
640 if (isspace(c))
641 return get_extended_base_var(name, c);
642 if (!iskeychar(c) && c != '.')
643 return -1;
644 strbuf_addch(name, tolower(c));
645 }
646}
647
648static int git_parse_source(config_fn_t fn, void *data)
649{
650 int comment = 0;
651 int baselen = 0;
652 struct strbuf *var = &cf->var;
653 int error_return = 0;
654 char *error_msg = NULL;
655
656 /* U+FEFF Byte Order Mark in UTF8 */
657 const char *bomptr = utf8_bom;
658
659 for (;;) {
660 int c = get_next_char();
661 if (bomptr && *bomptr) {
662 /* We are at the file beginning; skip UTF8-encoded BOM
663 * if present. Sane editors won't put this in on their
664 * own, but e.g. Windows Notepad will do it happily. */
665 if (c == (*bomptr & 0377)) {
666 bomptr++;
667 continue;
668 } else {
669 /* Do not tolerate partial BOM. */
670 if (bomptr != utf8_bom)
671 break;
672 /* No BOM at file beginning. Cool. */
673 bomptr = NULL;
674 }
675 }
676 if (c == '\n') {
677 if (cf->eof)
678 return 0;
679 comment = 0;
680 continue;
681 }
682 if (comment || isspace(c))
683 continue;
684 if (c == '#' || c == ';') {
685 comment = 1;
686 continue;
687 }
688 if (c == '[') {
689 /* Reset prior to determining a new stem */
690 strbuf_reset(var);
691 if (get_base_var(var) < 0 || var->len < 1)
692 break;
693 strbuf_addch(var, '.');
694 baselen = var->len;
695 continue;
696 }
697 if (!isalpha(c))
698 break;
699 /*
700 * Truncate the var name back to the section header
701 * stem prior to grabbing the suffix part of the name
702 * and the value.
703 */
704 strbuf_setlen(var, baselen);
705 strbuf_addch(var, tolower(c));
706 if (get_value(fn, data, var) < 0)
707 break;
708 }
709
710 switch (cf->origin_type) {
711 case CONFIG_ORIGIN_BLOB:
712 error_msg = xstrfmt(_("bad config line %d in blob %s"),
713 cf->linenr, cf->name);
714 break;
715 case CONFIG_ORIGIN_FILE:
716 error_msg = xstrfmt(_("bad config line %d in file %s"),
717 cf->linenr, cf->name);
718 break;
719 case CONFIG_ORIGIN_STDIN:
720 error_msg = xstrfmt(_("bad config line %d in standard input"),
721 cf->linenr);
722 break;
723 case CONFIG_ORIGIN_SUBMODULE_BLOB:
724 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
725 cf->linenr, cf->name);
726 break;
727 case CONFIG_ORIGIN_CMDLINE:
728 error_msg = xstrfmt(_("bad config line %d in command line %s"),
729 cf->linenr, cf->name);
730 break;
731 default:
732 error_msg = xstrfmt(_("bad config line %d in %s"),
733 cf->linenr, cf->name);
734 }
735
736 if (cf->die_on_error)
737 die("%s", error_msg);
738 else
739 error_return = error("%s", error_msg);
740
741 free(error_msg);
742 return error_return;
743}
744
745static int parse_unit_factor(const char *end, uintmax_t *val)
746{
747 if (!*end)
748 return 1;
749 else if (!strcasecmp(end, "k")) {
750 *val *= 1024;
751 return 1;
752 }
753 else if (!strcasecmp(end, "m")) {
754 *val *= 1024 * 1024;
755 return 1;
756 }
757 else if (!strcasecmp(end, "g")) {
758 *val *= 1024 * 1024 * 1024;
759 return 1;
760 }
761 return 0;
762}
763
764static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
765{
766 if (value && *value) {
767 char *end;
768 intmax_t val;
769 uintmax_t uval;
770 uintmax_t factor = 1;
771
772 errno = 0;
773 val = strtoimax(value, &end, 0);
774 if (errno == ERANGE)
775 return 0;
776 if (!parse_unit_factor(end, &factor)) {
777 errno = EINVAL;
778 return 0;
779 }
780 uval = labs(val);
781 uval *= factor;
782 if (uval > max || labs(val) > uval) {
783 errno = ERANGE;
784 return 0;
785 }
786 val *= factor;
787 *ret = val;
788 return 1;
789 }
790 errno = EINVAL;
791 return 0;
792}
793
794static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
795{
796 if (value && *value) {
797 char *end;
798 uintmax_t val;
799 uintmax_t oldval;
800
801 errno = 0;
802 val = strtoumax(value, &end, 0);
803 if (errno == ERANGE)
804 return 0;
805 oldval = val;
806 if (!parse_unit_factor(end, &val)) {
807 errno = EINVAL;
808 return 0;
809 }
810 if (val > max || oldval > val) {
811 errno = ERANGE;
812 return 0;
813 }
814 *ret = val;
815 return 1;
816 }
817 errno = EINVAL;
818 return 0;
819}
820
821static int git_parse_int(const char *value, int *ret)
822{
823 intmax_t tmp;
824 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
825 return 0;
826 *ret = tmp;
827 return 1;
828}
829
830static int git_parse_int64(const char *value, int64_t *ret)
831{
832 intmax_t tmp;
833 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
834 return 0;
835 *ret = tmp;
836 return 1;
837}
838
839int git_parse_ulong(const char *value, unsigned long *ret)
840{
841 uintmax_t tmp;
842 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
843 return 0;
844 *ret = tmp;
845 return 1;
846}
847
848static int git_parse_ssize_t(const char *value, ssize_t *ret)
849{
850 intmax_t tmp;
851 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(ssize_t)))
852 return 0;
853 *ret = tmp;
854 return 1;
855}
856
857NORETURN
858static void die_bad_number(const char *name, const char *value)
859{
860 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
861
862 if (!value)
863 value = "";
864
865 if (!(cf && cf->name))
866 die(_("bad numeric config value '%s' for '%s': %s"),
867 value, name, error_type);
868
869 switch (cf->origin_type) {
870 case CONFIG_ORIGIN_BLOB:
871 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
872 value, name, cf->name, error_type);
873 case CONFIG_ORIGIN_FILE:
874 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
875 value, name, cf->name, error_type);
876 case CONFIG_ORIGIN_STDIN:
877 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
878 value, name, error_type);
879 case CONFIG_ORIGIN_SUBMODULE_BLOB:
880 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
881 value, name, cf->name, error_type);
882 case CONFIG_ORIGIN_CMDLINE:
883 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
884 value, name, cf->name, error_type);
885 default:
886 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
887 value, name, cf->name, error_type);
888 }
889}
890
891int git_config_int(const char *name, const char *value)
892{
893 int ret;
894 if (!git_parse_int(value, &ret))
895 die_bad_number(name, value);
896 return ret;
897}
898
899int64_t git_config_int64(const char *name, const char *value)
900{
901 int64_t ret;
902 if (!git_parse_int64(value, &ret))
903 die_bad_number(name, value);
904 return ret;
905}
906
907unsigned long git_config_ulong(const char *name, const char *value)
908{
909 unsigned long ret;
910 if (!git_parse_ulong(value, &ret))
911 die_bad_number(name, value);
912 return ret;
913}
914
915ssize_t git_config_ssize_t(const char *name, const char *value)
916{
917 ssize_t ret;
918 if (!git_parse_ssize_t(value, &ret))
919 die_bad_number(name, value);
920 return ret;
921}
922
923int git_parse_maybe_bool(const char *value)
924{
925 if (!value)
926 return 1;
927 if (!*value)
928 return 0;
929 if (!strcasecmp(value, "true")
930 || !strcasecmp(value, "yes")
931 || !strcasecmp(value, "on"))
932 return 1;
933 if (!strcasecmp(value, "false")
934 || !strcasecmp(value, "no")
935 || !strcasecmp(value, "off"))
936 return 0;
937 return -1;
938}
939
940int git_config_maybe_bool(const char *name, const char *value)
941{
942 int v = git_parse_maybe_bool(value);
943 if (0 <= v)
944 return v;
945 if (git_parse_int(value, &v))
946 return !!v;
947 return -1;
948}
949
950int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
951{
952 int v = git_parse_maybe_bool(value);
953 if (0 <= v) {
954 *is_bool = 1;
955 return v;
956 }
957 *is_bool = 0;
958 return git_config_int(name, value);
959}
960
961int git_config_bool(const char *name, const char *value)
962{
963 int discard;
964 return !!git_config_bool_or_int(name, value, &discard);
965}
966
967int git_config_string(const char **dest, const char *var, const char *value)
968{
969 if (!value)
970 return config_error_nonbool(var);
971 *dest = xstrdup(value);
972 return 0;
973}
974
975int git_config_pathname(const char **dest, const char *var, const char *value)
976{
977 if (!value)
978 return config_error_nonbool(var);
979 *dest = expand_user_path(value, 0);
980 if (!*dest)
981 die(_("failed to expand user dir in: '%s'"), value);
982 return 0;
983}
984
985static int git_default_core_config(const char *var, const char *value)
986{
987 /* This needs a better name */
988 if (!strcmp(var, "core.filemode")) {
989 trust_executable_bit = git_config_bool(var, value);
990 return 0;
991 }
992 if (!strcmp(var, "core.trustctime")) {
993 trust_ctime = git_config_bool(var, value);
994 return 0;
995 }
996 if (!strcmp(var, "core.checkstat")) {
997 if (!strcasecmp(value, "default"))
998 check_stat = 1;
999 else if (!strcasecmp(value, "minimal"))
1000 check_stat = 0;
1001 }
1002
1003 if (!strcmp(var, "core.quotepath")) {
1004 quote_path_fully = git_config_bool(var, value);
1005 return 0;
1006 }
1007
1008 if (!strcmp(var, "core.symlinks")) {
1009 has_symlinks = git_config_bool(var, value);
1010 return 0;
1011 }
1012
1013 if (!strcmp(var, "core.ignorecase")) {
1014 ignore_case = git_config_bool(var, value);
1015 return 0;
1016 }
1017
1018 if (!strcmp(var, "core.attributesfile"))
1019 return git_config_pathname(&git_attributes_file, var, value);
1020
1021 if (!strcmp(var, "core.hookspath"))
1022 return git_config_pathname(&git_hooks_path, var, value);
1023
1024 if (!strcmp(var, "core.bare")) {
1025 is_bare_repository_cfg = git_config_bool(var, value);
1026 return 0;
1027 }
1028
1029 if (!strcmp(var, "core.ignorestat")) {
1030 assume_unchanged = git_config_bool(var, value);
1031 return 0;
1032 }
1033
1034 if (!strcmp(var, "core.prefersymlinkrefs")) {
1035 prefer_symlink_refs = git_config_bool(var, value);
1036 return 0;
1037 }
1038
1039 if (!strcmp(var, "core.logallrefupdates")) {
1040 if (value && !strcasecmp(value, "always"))
1041 log_all_ref_updates = LOG_REFS_ALWAYS;
1042 else if (git_config_bool(var, value))
1043 log_all_ref_updates = LOG_REFS_NORMAL;
1044 else
1045 log_all_ref_updates = LOG_REFS_NONE;
1046 return 0;
1047 }
1048
1049 if (!strcmp(var, "core.warnambiguousrefs")) {
1050 warn_ambiguous_refs = git_config_bool(var, value);
1051 return 0;
1052 }
1053
1054 if (!strcmp(var, "core.abbrev")) {
1055 if (!value)
1056 return config_error_nonbool(var);
1057 if (!strcasecmp(value, "auto"))
1058 default_abbrev = -1;
1059 else {
1060 int abbrev = git_config_int(var, value);
1061 if (abbrev < minimum_abbrev || abbrev > 40)
1062 return error("abbrev length out of range: %d", abbrev);
1063 default_abbrev = abbrev;
1064 }
1065 return 0;
1066 }
1067
1068 if (!strcmp(var, "core.disambiguate"))
1069 return set_disambiguate_hint_config(var, value);
1070
1071 if (!strcmp(var, "core.loosecompression")) {
1072 int level = git_config_int(var, value);
1073 if (level == -1)
1074 level = Z_DEFAULT_COMPRESSION;
1075 else if (level < 0 || level > Z_BEST_COMPRESSION)
1076 die(_("bad zlib compression level %d"), level);
1077 zlib_compression_level = level;
1078 zlib_compression_seen = 1;
1079 return 0;
1080 }
1081
1082 if (!strcmp(var, "core.compression")) {
1083 int level = git_config_int(var, value);
1084 if (level == -1)
1085 level = Z_DEFAULT_COMPRESSION;
1086 else if (level < 0 || level > Z_BEST_COMPRESSION)
1087 die(_("bad zlib compression level %d"), level);
1088 core_compression_level = level;
1089 core_compression_seen = 1;
1090 if (!zlib_compression_seen)
1091 zlib_compression_level = level;
1092 if (!pack_compression_seen)
1093 pack_compression_level = level;
1094 return 0;
1095 }
1096
1097 if (!strcmp(var, "core.packedgitwindowsize")) {
1098 int pgsz_x2 = getpagesize() * 2;
1099 packed_git_window_size = git_config_ulong(var, value);
1100
1101 /* This value must be multiple of (pagesize * 2) */
1102 packed_git_window_size /= pgsz_x2;
1103 if (packed_git_window_size < 1)
1104 packed_git_window_size = 1;
1105 packed_git_window_size *= pgsz_x2;
1106 return 0;
1107 }
1108
1109 if (!strcmp(var, "core.bigfilethreshold")) {
1110 big_file_threshold = git_config_ulong(var, value);
1111 return 0;
1112 }
1113
1114 if (!strcmp(var, "core.packedgitlimit")) {
1115 packed_git_limit = git_config_ulong(var, value);
1116 return 0;
1117 }
1118
1119 if (!strcmp(var, "core.deltabasecachelimit")) {
1120 delta_base_cache_limit = git_config_ulong(var, value);
1121 return 0;
1122 }
1123
1124 if (!strcmp(var, "core.autocrlf")) {
1125 if (value && !strcasecmp(value, "input")) {
1126 auto_crlf = AUTO_CRLF_INPUT;
1127 return 0;
1128 }
1129 auto_crlf = git_config_bool(var, value);
1130 return 0;
1131 }
1132
1133 if (!strcmp(var, "core.safecrlf")) {
1134 if (value && !strcasecmp(value, "warn")) {
1135 safe_crlf = SAFE_CRLF_WARN;
1136 return 0;
1137 }
1138 safe_crlf = git_config_bool(var, value);
1139 return 0;
1140 }
1141
1142 if (!strcmp(var, "core.eol")) {
1143 if (value && !strcasecmp(value, "lf"))
1144 core_eol = EOL_LF;
1145 else if (value && !strcasecmp(value, "crlf"))
1146 core_eol = EOL_CRLF;
1147 else if (value && !strcasecmp(value, "native"))
1148 core_eol = EOL_NATIVE;
1149 else
1150 core_eol = EOL_UNSET;
1151 return 0;
1152 }
1153
1154 if (!strcmp(var, "core.notesref")) {
1155 notes_ref_name = xstrdup(value);
1156 return 0;
1157 }
1158
1159 if (!strcmp(var, "core.editor"))
1160 return git_config_string(&editor_program, var, value);
1161
1162 if (!strcmp(var, "core.commentchar")) {
1163 if (!value)
1164 return config_error_nonbool(var);
1165 else if (!strcasecmp(value, "auto"))
1166 auto_comment_line_char = 1;
1167 else if (value[0] && !value[1]) {
1168 comment_line_char = value[0];
1169 auto_comment_line_char = 0;
1170 } else
1171 return error("core.commentChar should only be one character");
1172 return 0;
1173 }
1174
1175 if (!strcmp(var, "core.askpass"))
1176 return git_config_string(&askpass_program, var, value);
1177
1178 if (!strcmp(var, "core.excludesfile"))
1179 return git_config_pathname(&excludes_file, var, value);
1180
1181 if (!strcmp(var, "core.whitespace")) {
1182 if (!value)
1183 return config_error_nonbool(var);
1184 whitespace_rule_cfg = parse_whitespace_rule(value);
1185 return 0;
1186 }
1187
1188 if (!strcmp(var, "core.fsyncobjectfiles")) {
1189 fsync_object_files = git_config_bool(var, value);
1190 return 0;
1191 }
1192
1193 if (!strcmp(var, "core.preloadindex")) {
1194 core_preload_index = git_config_bool(var, value);
1195 return 0;
1196 }
1197
1198 if (!strcmp(var, "core.createobject")) {
1199 if (!strcmp(value, "rename"))
1200 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1201 else if (!strcmp(value, "link"))
1202 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1203 else
1204 die(_("invalid mode for object creation: %s"), value);
1205 return 0;
1206 }
1207
1208 if (!strcmp(var, "core.sparsecheckout")) {
1209 core_apply_sparse_checkout = git_config_bool(var, value);
1210 return 0;
1211 }
1212
1213 if (!strcmp(var, "core.precomposeunicode")) {
1214 precomposed_unicode = git_config_bool(var, value);
1215 return 0;
1216 }
1217
1218 if (!strcmp(var, "core.protecthfs")) {
1219 protect_hfs = git_config_bool(var, value);
1220 return 0;
1221 }
1222
1223 if (!strcmp(var, "core.protectntfs")) {
1224 protect_ntfs = git_config_bool(var, value);
1225 return 0;
1226 }
1227
1228 if (!strcmp(var, "core.hidedotfiles")) {
1229 if (value && !strcasecmp(value, "dotgitonly"))
1230 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1231 else
1232 hide_dotfiles = git_config_bool(var, value);
1233 return 0;
1234 }
1235
1236 /* Add other config variables here and to Documentation/config.txt. */
1237 return 0;
1238}
1239
1240static int git_default_i18n_config(const char *var, const char *value)
1241{
1242 if (!strcmp(var, "i18n.commitencoding"))
1243 return git_config_string(&git_commit_encoding, var, value);
1244
1245 if (!strcmp(var, "i18n.logoutputencoding"))
1246 return git_config_string(&git_log_output_encoding, var, value);
1247
1248 /* Add other config variables here and to Documentation/config.txt. */
1249 return 0;
1250}
1251
1252static int git_default_branch_config(const char *var, const char *value)
1253{
1254 if (!strcmp(var, "branch.autosetupmerge")) {
1255 if (value && !strcasecmp(value, "always")) {
1256 git_branch_track = BRANCH_TRACK_ALWAYS;
1257 return 0;
1258 }
1259 git_branch_track = git_config_bool(var, value);
1260 return 0;
1261 }
1262 if (!strcmp(var, "branch.autosetuprebase")) {
1263 if (!value)
1264 return config_error_nonbool(var);
1265 else if (!strcmp(value, "never"))
1266 autorebase = AUTOREBASE_NEVER;
1267 else if (!strcmp(value, "local"))
1268 autorebase = AUTOREBASE_LOCAL;
1269 else if (!strcmp(value, "remote"))
1270 autorebase = AUTOREBASE_REMOTE;
1271 else if (!strcmp(value, "always"))
1272 autorebase = AUTOREBASE_ALWAYS;
1273 else
1274 return error("malformed value for %s", var);
1275 return 0;
1276 }
1277
1278 /* Add other config variables here and to Documentation/config.txt. */
1279 return 0;
1280}
1281
1282static int git_default_push_config(const char *var, const char *value)
1283{
1284 if (!strcmp(var, "push.default")) {
1285 if (!value)
1286 return config_error_nonbool(var);
1287 else if (!strcmp(value, "nothing"))
1288 push_default = PUSH_DEFAULT_NOTHING;
1289 else if (!strcmp(value, "matching"))
1290 push_default = PUSH_DEFAULT_MATCHING;
1291 else if (!strcmp(value, "simple"))
1292 push_default = PUSH_DEFAULT_SIMPLE;
1293 else if (!strcmp(value, "upstream"))
1294 push_default = PUSH_DEFAULT_UPSTREAM;
1295 else if (!strcmp(value, "tracking")) /* deprecated */
1296 push_default = PUSH_DEFAULT_UPSTREAM;
1297 else if (!strcmp(value, "current"))
1298 push_default = PUSH_DEFAULT_CURRENT;
1299 else {
1300 error("malformed value for %s: %s", var, value);
1301 return error("Must be one of nothing, matching, simple, "
1302 "upstream or current.");
1303 }
1304 return 0;
1305 }
1306
1307 /* Add other config variables here and to Documentation/config.txt. */
1308 return 0;
1309}
1310
1311static int git_default_mailmap_config(const char *var, const char *value)
1312{
1313 if (!strcmp(var, "mailmap.file"))
1314 return git_config_pathname(&git_mailmap_file, var, value);
1315 if (!strcmp(var, "mailmap.blob"))
1316 return git_config_string(&git_mailmap_blob, var, value);
1317
1318 /* Add other config variables here and to Documentation/config.txt. */
1319 return 0;
1320}
1321
1322int git_default_config(const char *var, const char *value, void *dummy)
1323{
1324 if (starts_with(var, "core."))
1325 return git_default_core_config(var, value);
1326
1327 if (starts_with(var, "user."))
1328 return git_ident_config(var, value, dummy);
1329
1330 if (starts_with(var, "i18n."))
1331 return git_default_i18n_config(var, value);
1332
1333 if (starts_with(var, "branch."))
1334 return git_default_branch_config(var, value);
1335
1336 if (starts_with(var, "push."))
1337 return git_default_push_config(var, value);
1338
1339 if (starts_with(var, "mailmap."))
1340 return git_default_mailmap_config(var, value);
1341
1342 if (starts_with(var, "advice."))
1343 return git_default_advice_config(var, value);
1344
1345 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1346 pager_use_color = git_config_bool(var,value);
1347 return 0;
1348 }
1349
1350 if (!strcmp(var, "pack.packsizelimit")) {
1351 pack_size_limit_cfg = git_config_ulong(var, value);
1352 return 0;
1353 }
1354
1355 if (!strcmp(var, "pack.compression")) {
1356 int level = git_config_int(var, value);
1357 if (level == -1)
1358 level = Z_DEFAULT_COMPRESSION;
1359 else if (level < 0 || level > Z_BEST_COMPRESSION)
1360 die(_("bad pack compression level %d"), level);
1361 pack_compression_level = level;
1362 pack_compression_seen = 1;
1363 return 0;
1364 }
1365
1366 /* Add other config variables here and to Documentation/config.txt. */
1367 return 0;
1368}
1369
1370/*
1371 * All source specific fields in the union, die_on_error, name and the callbacks
1372 * fgetc, ungetc, ftell of top need to be initialized before calling
1373 * this function.
1374 */
1375static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1376{
1377 int ret;
1378
1379 /* push config-file parsing state stack */
1380 top->prev = cf;
1381 top->linenr = 1;
1382 top->eof = 0;
1383 strbuf_init(&top->value, 1024);
1384 strbuf_init(&top->var, 1024);
1385 cf = top;
1386
1387 ret = git_parse_source(fn, data);
1388
1389 /* pop config-file parsing state stack */
1390 strbuf_release(&top->value);
1391 strbuf_release(&top->var);
1392 cf = top->prev;
1393
1394 return ret;
1395}
1396
1397static int do_config_from_file(config_fn_t fn,
1398 const enum config_origin_type origin_type,
1399 const char *name, const char *path, FILE *f,
1400 void *data)
1401{
1402 struct config_source top;
1403
1404 top.u.file = f;
1405 top.origin_type = origin_type;
1406 top.name = name;
1407 top.path = path;
1408 top.die_on_error = 1;
1409 top.do_fgetc = config_file_fgetc;
1410 top.do_ungetc = config_file_ungetc;
1411 top.do_ftell = config_file_ftell;
1412
1413 return do_config_from(&top, fn, data);
1414}
1415
1416static int git_config_from_stdin(config_fn_t fn, void *data)
1417{
1418 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1419}
1420
1421int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1422{
1423 int ret = -1;
1424 FILE *f;
1425
1426 f = fopen(filename, "r");
1427 if (f) {
1428 flockfile(f);
1429 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1430 funlockfile(f);
1431 fclose(f);
1432 }
1433 return ret;
1434}
1435
1436int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1437 const char *name, const char *buf, size_t len, void *data)
1438{
1439 struct config_source top;
1440
1441 top.u.buf.buf = buf;
1442 top.u.buf.len = len;
1443 top.u.buf.pos = 0;
1444 top.origin_type = origin_type;
1445 top.name = name;
1446 top.path = NULL;
1447 top.die_on_error = 0;
1448 top.do_fgetc = config_buf_fgetc;
1449 top.do_ungetc = config_buf_ungetc;
1450 top.do_ftell = config_buf_ftell;
1451
1452 return do_config_from(&top, fn, data);
1453}
1454
1455int git_config_from_blob_sha1(config_fn_t fn,
1456 const char *name,
1457 const unsigned char *sha1,
1458 void *data)
1459{
1460 enum object_type type;
1461 char *buf;
1462 unsigned long size;
1463 int ret;
1464
1465 buf = read_sha1_file(sha1, &type, &size);
1466 if (!buf)
1467 return error("unable to load config blob object '%s'", name);
1468 if (type != OBJ_BLOB) {
1469 free(buf);
1470 return error("reference '%s' does not point to a blob", name);
1471 }
1472
1473 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1474 free(buf);
1475
1476 return ret;
1477}
1478
1479static int git_config_from_blob_ref(config_fn_t fn,
1480 const char *name,
1481 void *data)
1482{
1483 unsigned char sha1[20];
1484
1485 if (get_sha1(name, sha1) < 0)
1486 return error("unable to resolve config blob '%s'", name);
1487 return git_config_from_blob_sha1(fn, name, sha1, data);
1488}
1489
1490const char *git_etc_gitconfig(void)
1491{
1492 static const char *system_wide;
1493 if (!system_wide)
1494 system_wide = system_path(ETC_GITCONFIG);
1495 return system_wide;
1496}
1497
1498/*
1499 * Parse environment variable 'k' as a boolean (in various
1500 * possible spellings); if missing, use the default value 'def'.
1501 */
1502int git_env_bool(const char *k, int def)
1503{
1504 const char *v = getenv(k);
1505 return v ? git_config_bool(k, v) : def;
1506}
1507
1508/*
1509 * Parse environment variable 'k' as ulong with possibly a unit
1510 * suffix; if missing, use the default value 'val'.
1511 */
1512unsigned long git_env_ulong(const char *k, unsigned long val)
1513{
1514 const char *v = getenv(k);
1515 if (v && !git_parse_ulong(v, &val))
1516 die("failed to parse %s", k);
1517 return val;
1518}
1519
1520int git_config_system(void)
1521{
1522 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1523}
1524
1525static int do_git_config_sequence(const struct config_options *opts,
1526 config_fn_t fn, void *data)
1527{
1528 int ret = 0;
1529 char *xdg_config = xdg_config_home("config");
1530 char *user_config = expand_user_path("~/.gitconfig", 0);
1531 char *repo_config;
1532
1533 if (opts->git_dir)
1534 repo_config = mkpathdup("%s/config", opts->git_dir);
1535 else if (have_git_dir())
1536 repo_config = git_pathdup("config");
1537 else
1538 repo_config = NULL;
1539
1540 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1541 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1542 ret += git_config_from_file(fn, git_etc_gitconfig(),
1543 data);
1544
1545 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1546 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1547 ret += git_config_from_file(fn, xdg_config, data);
1548
1549 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1550 ret += git_config_from_file(fn, user_config, data);
1551
1552 current_parsing_scope = CONFIG_SCOPE_REPO;
1553 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1554 ret += git_config_from_file(fn, repo_config, data);
1555
1556 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1557 if (git_config_from_parameters(fn, data) < 0)
1558 die(_("unable to parse command-line config"));
1559
1560 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1561 free(xdg_config);
1562 free(user_config);
1563 free(repo_config);
1564 return ret;
1565}
1566
1567int git_config_with_options(config_fn_t fn, void *data,
1568 struct git_config_source *config_source,
1569 const struct config_options *opts)
1570{
1571 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1572
1573 if (opts->respect_includes) {
1574 inc.fn = fn;
1575 inc.data = data;
1576 inc.opts = opts;
1577 fn = git_config_include;
1578 data = &inc;
1579 }
1580
1581 /*
1582 * If we have a specific filename, use it. Otherwise, follow the
1583 * regular lookup sequence.
1584 */
1585 if (config_source && config_source->use_stdin)
1586 return git_config_from_stdin(fn, data);
1587 else if (config_source && config_source->file)
1588 return git_config_from_file(fn, config_source->file, data);
1589 else if (config_source && config_source->blob)
1590 return git_config_from_blob_ref(fn, config_source->blob, data);
1591
1592 return do_git_config_sequence(opts, fn, data);
1593}
1594
1595static void git_config_raw(config_fn_t fn, void *data)
1596{
1597 struct config_options opts = {0};
1598
1599 opts.respect_includes = 1;
1600 if (git_config_with_options(fn, data, NULL, &opts) < 0)
1601 /*
1602 * git_config_with_options() normally returns only
1603 * zero, as most errors are fatal, and
1604 * non-fatal potential errors are guarded by "if"
1605 * statements that are entered only when no error is
1606 * possible.
1607 *
1608 * If we ever encounter a non-fatal error, it means
1609 * something went really wrong and we should stop
1610 * immediately.
1611 */
1612 die(_("unknown error occurred while reading the configuration files"));
1613}
1614
1615static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1616{
1617 int i, value_index;
1618 struct string_list *values;
1619 struct config_set_element *entry;
1620 struct configset_list *list = &cs->list;
1621
1622 for (i = 0; i < list->nr; i++) {
1623 entry = list->items[i].e;
1624 value_index = list->items[i].value_index;
1625 values = &entry->value_list;
1626
1627 current_config_kvi = values->items[value_index].util;
1628
1629 if (fn(entry->key, values->items[value_index].string, data) < 0)
1630 git_die_config_linenr(entry->key,
1631 current_config_kvi->filename,
1632 current_config_kvi->linenr);
1633
1634 current_config_kvi = NULL;
1635 }
1636}
1637
1638void read_early_config(config_fn_t cb, void *data)
1639{
1640 struct config_options opts = {0};
1641 struct strbuf buf = STRBUF_INIT;
1642
1643 opts.respect_includes = 1;
1644
1645 if (have_git_dir())
1646 opts.git_dir = get_git_dir();
1647 /*
1648 * When setup_git_directory() was not yet asked to discover the
1649 * GIT_DIR, we ask discover_git_directory() to figure out whether there
1650 * is any repository config we should use (but unlike
1651 * setup_git_directory_gently(), no global state is changed, most
1652 * notably, the current working directory is still the same after the
1653 * call).
1654 */
1655 else if (discover_git_directory(&buf))
1656 opts.git_dir = buf.buf;
1657
1658 git_config_with_options(cb, data, NULL, &opts);
1659
1660 strbuf_release(&buf);
1661}
1662
1663static void git_config_check_init(void);
1664
1665void git_config(config_fn_t fn, void *data)
1666{
1667 git_config_check_init();
1668 configset_iter(&the_config_set, fn, data);
1669}
1670
1671static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1672{
1673 struct config_set_element k;
1674 struct config_set_element *found_entry;
1675 char *normalized_key;
1676 /*
1677 * `key` may come from the user, so normalize it before using it
1678 * for querying entries from the hashmap.
1679 */
1680 if (git_config_parse_key(key, &normalized_key, NULL))
1681 return NULL;
1682
1683 hashmap_entry_init(&k, strhash(normalized_key));
1684 k.key = normalized_key;
1685 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1686 free(normalized_key);
1687 return found_entry;
1688}
1689
1690static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1691{
1692 struct config_set_element *e;
1693 struct string_list_item *si;
1694 struct configset_list_item *l_item;
1695 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1696
1697 e = configset_find_element(cs, key);
1698 /*
1699 * Since the keys are being fed by git_config*() callback mechanism, they
1700 * are already normalized. So simply add them without any further munging.
1701 */
1702 if (!e) {
1703 e = xmalloc(sizeof(*e));
1704 hashmap_entry_init(e, strhash(key));
1705 e->key = xstrdup(key);
1706 string_list_init(&e->value_list, 1);
1707 hashmap_add(&cs->config_hash, e);
1708 }
1709 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1710
1711 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1712 l_item = &cs->list.items[cs->list.nr++];
1713 l_item->e = e;
1714 l_item->value_index = e->value_list.nr - 1;
1715
1716 if (!cf)
1717 die("BUG: configset_add_value has no source");
1718 if (cf->name) {
1719 kv_info->filename = strintern(cf->name);
1720 kv_info->linenr = cf->linenr;
1721 kv_info->origin_type = cf->origin_type;
1722 } else {
1723 /* for values read from `git_config_from_parameters()` */
1724 kv_info->filename = NULL;
1725 kv_info->linenr = -1;
1726 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1727 }
1728 kv_info->scope = current_parsing_scope;
1729 si->util = kv_info;
1730
1731 return 0;
1732}
1733
1734static int config_set_element_cmp(const struct config_set_element *e1,
1735 const struct config_set_element *e2, const void *unused)
1736{
1737 return strcmp(e1->key, e2->key);
1738}
1739
1740void git_configset_init(struct config_set *cs)
1741{
1742 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1743 cs->hash_initialized = 1;
1744 cs->list.nr = 0;
1745 cs->list.alloc = 0;
1746 cs->list.items = NULL;
1747}
1748
1749void git_configset_clear(struct config_set *cs)
1750{
1751 struct config_set_element *entry;
1752 struct hashmap_iter iter;
1753 if (!cs->hash_initialized)
1754 return;
1755
1756 hashmap_iter_init(&cs->config_hash, &iter);
1757 while ((entry = hashmap_iter_next(&iter))) {
1758 free(entry->key);
1759 string_list_clear(&entry->value_list, 1);
1760 }
1761 hashmap_free(&cs->config_hash, 1);
1762 cs->hash_initialized = 0;
1763 free(cs->list.items);
1764 cs->list.nr = 0;
1765 cs->list.alloc = 0;
1766 cs->list.items = NULL;
1767}
1768
1769static int config_set_callback(const char *key, const char *value, void *cb)
1770{
1771 struct config_set *cs = cb;
1772 configset_add_value(cs, key, value);
1773 return 0;
1774}
1775
1776int git_configset_add_file(struct config_set *cs, const char *filename)
1777{
1778 return git_config_from_file(config_set_callback, filename, cs);
1779}
1780
1781int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1782{
1783 const struct string_list *values = NULL;
1784 /*
1785 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1786 * queried key in the files of the configset, the value returned will be the last
1787 * value in the value list for that key.
1788 */
1789 values = git_configset_get_value_multi(cs, key);
1790
1791 if (!values)
1792 return 1;
1793 assert(values->nr > 0);
1794 *value = values->items[values->nr - 1].string;
1795 return 0;
1796}
1797
1798const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1799{
1800 struct config_set_element *e = configset_find_element(cs, key);
1801 return e ? &e->value_list : NULL;
1802}
1803
1804int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1805{
1806 const char *value;
1807 if (!git_configset_get_value(cs, key, &value))
1808 return git_config_string(dest, key, value);
1809 else
1810 return 1;
1811}
1812
1813int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1814{
1815 return git_configset_get_string_const(cs, key, (const char **)dest);
1816}
1817
1818int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1819{
1820 const char *value;
1821 if (!git_configset_get_value(cs, key, &value)) {
1822 *dest = git_config_int(key, value);
1823 return 0;
1824 } else
1825 return 1;
1826}
1827
1828int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1829{
1830 const char *value;
1831 if (!git_configset_get_value(cs, key, &value)) {
1832 *dest = git_config_ulong(key, value);
1833 return 0;
1834 } else
1835 return 1;
1836}
1837
1838int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1839{
1840 const char *value;
1841 if (!git_configset_get_value(cs, key, &value)) {
1842 *dest = git_config_bool(key, value);
1843 return 0;
1844 } else
1845 return 1;
1846}
1847
1848int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1849 int *is_bool, int *dest)
1850{
1851 const char *value;
1852 if (!git_configset_get_value(cs, key, &value)) {
1853 *dest = git_config_bool_or_int(key, value, is_bool);
1854 return 0;
1855 } else
1856 return 1;
1857}
1858
1859int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1860{
1861 const char *value;
1862 if (!git_configset_get_value(cs, key, &value)) {
1863 *dest = git_config_maybe_bool(key, value);
1864 if (*dest == -1)
1865 return -1;
1866 return 0;
1867 } else
1868 return 1;
1869}
1870
1871int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1872{
1873 const char *value;
1874 if (!git_configset_get_value(cs, key, &value))
1875 return git_config_pathname(dest, key, value);
1876 else
1877 return 1;
1878}
1879
1880static void git_config_check_init(void)
1881{
1882 if (the_config_set.hash_initialized)
1883 return;
1884 git_configset_init(&the_config_set);
1885 git_config_raw(config_set_callback, &the_config_set);
1886}
1887
1888void git_config_clear(void)
1889{
1890 if (!the_config_set.hash_initialized)
1891 return;
1892 git_configset_clear(&the_config_set);
1893}
1894
1895int git_config_get_value(const char *key, const char **value)
1896{
1897 git_config_check_init();
1898 return git_configset_get_value(&the_config_set, key, value);
1899}
1900
1901const struct string_list *git_config_get_value_multi(const char *key)
1902{
1903 git_config_check_init();
1904 return git_configset_get_value_multi(&the_config_set, key);
1905}
1906
1907int git_config_get_string_const(const char *key, const char **dest)
1908{
1909 int ret;
1910 git_config_check_init();
1911 ret = git_configset_get_string_const(&the_config_set, key, dest);
1912 if (ret < 0)
1913 git_die_config(key, NULL);
1914 return ret;
1915}
1916
1917int git_config_get_string(const char *key, char **dest)
1918{
1919 git_config_check_init();
1920 return git_config_get_string_const(key, (const char **)dest);
1921}
1922
1923int git_config_get_int(const char *key, int *dest)
1924{
1925 git_config_check_init();
1926 return git_configset_get_int(&the_config_set, key, dest);
1927}
1928
1929int git_config_get_ulong(const char *key, unsigned long *dest)
1930{
1931 git_config_check_init();
1932 return git_configset_get_ulong(&the_config_set, key, dest);
1933}
1934
1935int git_config_get_bool(const char *key, int *dest)
1936{
1937 git_config_check_init();
1938 return git_configset_get_bool(&the_config_set, key, dest);
1939}
1940
1941int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1942{
1943 git_config_check_init();
1944 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1945}
1946
1947int git_config_get_maybe_bool(const char *key, int *dest)
1948{
1949 git_config_check_init();
1950 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1951}
1952
1953int git_config_get_pathname(const char *key, const char **dest)
1954{
1955 int ret;
1956 git_config_check_init();
1957 ret = git_configset_get_pathname(&the_config_set, key, dest);
1958 if (ret < 0)
1959 git_die_config(key, NULL);
1960 return ret;
1961}
1962
1963int git_config_get_expiry(const char *key, const char **output)
1964{
1965 int ret = git_config_get_string_const(key, output);
1966 if (ret)
1967 return ret;
1968 if (strcmp(*output, "now")) {
1969 unsigned long now = approxidate("now");
1970 if (approxidate(*output) >= now)
1971 git_die_config(key, _("Invalid %s: '%s'"), key, *output);
1972 }
1973 return ret;
1974}
1975
1976int git_config_get_untracked_cache(void)
1977{
1978 int val = -1;
1979 const char *v;
1980
1981 /* Hack for test programs like test-dump-untracked-cache */
1982 if (ignore_untracked_cache_config)
1983 return -1;
1984
1985 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1986 return val;
1987
1988 if (!git_config_get_value("core.untrackedcache", &v)) {
1989 if (!strcasecmp(v, "keep"))
1990 return -1;
1991
1992 error(_("unknown core.untrackedCache value '%s'; "
1993 "using 'keep' default value"), v);
1994 return -1;
1995 }
1996
1997 return -1; /* default value */
1998}
1999
2000int git_config_get_split_index(void)
2001{
2002 int val;
2003
2004 if (!git_config_get_maybe_bool("core.splitindex", &val))
2005 return val;
2006
2007 return -1; /* default value */
2008}
2009
2010int git_config_get_max_percent_split_change(void)
2011{
2012 int val = -1;
2013
2014 if (!git_config_get_int("splitindex.maxpercentchange", &val)) {
2015 if (0 <= val && val <= 100)
2016 return val;
2017
2018 return error(_("splitIndex.maxPercentChange value '%d' "
2019 "should be between 0 and 100"), val);
2020 }
2021
2022 return -1; /* default value */
2023}
2024
2025NORETURN
2026void git_die_config_linenr(const char *key, const char *filename, int linenr)
2027{
2028 if (!filename)
2029 die(_("unable to parse '%s' from command-line config"), key);
2030 else
2031 die(_("bad config variable '%s' in file '%s' at line %d"),
2032 key, filename, linenr);
2033}
2034
2035NORETURN __attribute__((format(printf, 2, 3)))
2036void git_die_config(const char *key, const char *err, ...)
2037{
2038 const struct string_list *values;
2039 struct key_value_info *kv_info;
2040
2041 if (err) {
2042 va_list params;
2043 va_start(params, err);
2044 vreportf("error: ", err, params);
2045 va_end(params);
2046 }
2047 values = git_config_get_value_multi(key);
2048 kv_info = values->items[values->nr - 1].util;
2049 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
2050}
2051
2052/*
2053 * Find all the stuff for git_config_set() below.
2054 */
2055
2056static struct {
2057 int baselen;
2058 char *key;
2059 int do_not_match;
2060 regex_t *value_regex;
2061 int multi_replace;
2062 size_t *offset;
2063 unsigned int offset_alloc;
2064 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
2065 int seen;
2066} store;
2067
2068static int matches(const char *key, const char *value)
2069{
2070 if (strcmp(key, store.key))
2071 return 0; /* not ours */
2072 if (!store.value_regex)
2073 return 1; /* always matches */
2074 if (store.value_regex == CONFIG_REGEX_NONE)
2075 return 0; /* never matches */
2076
2077 return store.do_not_match ^
2078 (value && !regexec(store.value_regex, value, 0, NULL, 0));
2079}
2080
2081static int store_aux(const char *key, const char *value, void *cb)
2082{
2083 const char *ep;
2084 size_t section_len;
2085
2086 switch (store.state) {
2087 case KEY_SEEN:
2088 if (matches(key, value)) {
2089 if (store.seen == 1 && store.multi_replace == 0) {
2090 warning(_("%s has multiple values"), key);
2091 }
2092
2093 ALLOC_GROW(store.offset, store.seen + 1,
2094 store.offset_alloc);
2095
2096 store.offset[store.seen] = cf->do_ftell(cf);
2097 store.seen++;
2098 }
2099 break;
2100 case SECTION_SEEN:
2101 /*
2102 * What we are looking for is in store.key (both
2103 * section and var), and its section part is baselen
2104 * long. We found key (again, both section and var).
2105 * We would want to know if this key is in the same
2106 * section as what we are looking for. We already
2107 * know we are in the same section as what should
2108 * hold store.key.
2109 */
2110 ep = strrchr(key, '.');
2111 section_len = ep - key;
2112
2113 if ((section_len != store.baselen) ||
2114 memcmp(key, store.key, section_len+1)) {
2115 store.state = SECTION_END_SEEN;
2116 break;
2117 }
2118
2119 /*
2120 * Do not increment matches: this is no match, but we
2121 * just made sure we are in the desired section.
2122 */
2123 ALLOC_GROW(store.offset, store.seen + 1,
2124 store.offset_alloc);
2125 store.offset[store.seen] = cf->do_ftell(cf);
2126 /* fallthru */
2127 case SECTION_END_SEEN:
2128 case START:
2129 if (matches(key, value)) {
2130 ALLOC_GROW(store.offset, store.seen + 1,
2131 store.offset_alloc);
2132 store.offset[store.seen] = cf->do_ftell(cf);
2133 store.state = KEY_SEEN;
2134 store.seen++;
2135 } else {
2136 if (strrchr(key, '.') - key == store.baselen &&
2137 !strncmp(key, store.key, store.baselen)) {
2138 store.state = SECTION_SEEN;
2139 ALLOC_GROW(store.offset,
2140 store.seen + 1,
2141 store.offset_alloc);
2142 store.offset[store.seen] = cf->do_ftell(cf);
2143 }
2144 }
2145 }
2146 return 0;
2147}
2148
2149static int write_error(const char *filename)
2150{
2151 error("failed to write new configuration file %s", filename);
2152
2153 /* Same error code as "failed to rename". */
2154 return 4;
2155}
2156
2157static int store_write_section(int fd, const char *key)
2158{
2159 const char *dot;
2160 int i, success;
2161 struct strbuf sb = STRBUF_INIT;
2162
2163 dot = memchr(key, '.', store.baselen);
2164 if (dot) {
2165 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
2166 for (i = dot - key + 1; i < store.baselen; i++) {
2167 if (key[i] == '"' || key[i] == '\\')
2168 strbuf_addch(&sb, '\\');
2169 strbuf_addch(&sb, key[i]);
2170 }
2171 strbuf_addstr(&sb, "\"]\n");
2172 } else {
2173 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
2174 }
2175
2176 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2177 strbuf_release(&sb);
2178
2179 return success;
2180}
2181
2182static int store_write_pair(int fd, const char *key, const char *value)
2183{
2184 int i, success;
2185 int length = strlen(key + store.baselen + 1);
2186 const char *quote = "";
2187 struct strbuf sb = STRBUF_INIT;
2188
2189 /*
2190 * Check to see if the value needs to be surrounded with a dq pair.
2191 * Note that problematic characters are always backslash-quoted; this
2192 * check is about not losing leading or trailing SP and strings that
2193 * follow beginning-of-comment characters (i.e. ';' and '#') by the
2194 * configuration parser.
2195 */
2196 if (value[0] == ' ')
2197 quote = "\"";
2198 for (i = 0; value[i]; i++)
2199 if (value[i] == ';' || value[i] == '#')
2200 quote = "\"";
2201 if (i && value[i - 1] == ' ')
2202 quote = "\"";
2203
2204 strbuf_addf(&sb, "\t%.*s = %s",
2205 length, key + store.baselen + 1, quote);
2206
2207 for (i = 0; value[i]; i++)
2208 switch (value[i]) {
2209 case '\n':
2210 strbuf_addstr(&sb, "\\n");
2211 break;
2212 case '\t':
2213 strbuf_addstr(&sb, "\\t");
2214 break;
2215 case '"':
2216 case '\\':
2217 strbuf_addch(&sb, '\\');
2218 default:
2219 strbuf_addch(&sb, value[i]);
2220 break;
2221 }
2222 strbuf_addf(&sb, "%s\n", quote);
2223
2224 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2225 strbuf_release(&sb);
2226
2227 return success;
2228}
2229
2230static ssize_t find_beginning_of_line(const char *contents, size_t size,
2231 size_t offset_, int *found_bracket)
2232{
2233 size_t equal_offset = size, bracket_offset = size;
2234 ssize_t offset;
2235
2236contline:
2237 for (offset = offset_-2; offset > 0
2238 && contents[offset] != '\n'; offset--)
2239 switch (contents[offset]) {
2240 case '=': equal_offset = offset; break;
2241 case ']': bracket_offset = offset; break;
2242 }
2243 if (offset > 0 && contents[offset-1] == '\\') {
2244 offset_ = offset;
2245 goto contline;
2246 }
2247 if (bracket_offset < equal_offset) {
2248 *found_bracket = 1;
2249 offset = bracket_offset+1;
2250 } else
2251 offset++;
2252
2253 return offset;
2254}
2255
2256int git_config_set_in_file_gently(const char *config_filename,
2257 const char *key, const char *value)
2258{
2259 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2260}
2261
2262void git_config_set_in_file(const char *config_filename,
2263 const char *key, const char *value)
2264{
2265 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2266}
2267
2268int git_config_set_gently(const char *key, const char *value)
2269{
2270 return git_config_set_multivar_gently(key, value, NULL, 0);
2271}
2272
2273void git_config_set(const char *key, const char *value)
2274{
2275 git_config_set_multivar(key, value, NULL, 0);
2276}
2277
2278/*
2279 * If value==NULL, unset in (remove from) config,
2280 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2281 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2282 * (only add a new one)
2283 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2284 * else all matching key/values (regardless how many) are removed,
2285 * before the new pair is written.
2286 *
2287 * Returns 0 on success.
2288 *
2289 * This function does this:
2290 *
2291 * - it locks the config file by creating ".git/config.lock"
2292 *
2293 * - it then parses the config using store_aux() as validator to find
2294 * the position on the key/value pair to replace. If it is to be unset,
2295 * it must be found exactly once.
2296 *
2297 * - the config file is mmap()ed and the part before the match (if any) is
2298 * written to the lock file, then the changed part and the rest.
2299 *
2300 * - the config file is removed and the lock file rename()d to it.
2301 *
2302 */
2303int git_config_set_multivar_in_file_gently(const char *config_filename,
2304 const char *key, const char *value,
2305 const char *value_regex,
2306 int multi_replace)
2307{
2308 int fd = -1, in_fd = -1;
2309 int ret;
2310 struct lock_file *lock = NULL;
2311 char *filename_buf = NULL;
2312 char *contents = NULL;
2313 size_t contents_sz;
2314
2315 /* parse-key returns negative; flip the sign to feed exit(3) */
2316 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2317 if (ret)
2318 goto out_free;
2319
2320 store.multi_replace = multi_replace;
2321
2322 if (!config_filename)
2323 config_filename = filename_buf = git_pathdup("config");
2324
2325 /*
2326 * The lock serves a purpose in addition to locking: the new
2327 * contents of .git/config will be written into it.
2328 */
2329 lock = xcalloc(1, sizeof(struct lock_file));
2330 fd = hold_lock_file_for_update(lock, config_filename, 0);
2331 if (fd < 0) {
2332 error_errno("could not lock config file %s", config_filename);
2333 free(store.key);
2334 ret = CONFIG_NO_LOCK;
2335 goto out_free;
2336 }
2337
2338 /*
2339 * If .git/config does not exist yet, write a minimal version.
2340 */
2341 in_fd = open(config_filename, O_RDONLY);
2342 if ( in_fd < 0 ) {
2343 free(store.key);
2344
2345 if ( ENOENT != errno ) {
2346 error_errno("opening %s", config_filename);
2347 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2348 goto out_free;
2349 }
2350 /* if nothing to unset, error out */
2351 if (value == NULL) {
2352 ret = CONFIG_NOTHING_SET;
2353 goto out_free;
2354 }
2355
2356 store.key = (char *)key;
2357 if (!store_write_section(fd, key) ||
2358 !store_write_pair(fd, key, value))
2359 goto write_err_out;
2360 } else {
2361 struct stat st;
2362 size_t copy_begin, copy_end;
2363 int i, new_line = 0;
2364
2365 if (value_regex == NULL)
2366 store.value_regex = NULL;
2367 else if (value_regex == CONFIG_REGEX_NONE)
2368 store.value_regex = CONFIG_REGEX_NONE;
2369 else {
2370 if (value_regex[0] == '!') {
2371 store.do_not_match = 1;
2372 value_regex++;
2373 } else
2374 store.do_not_match = 0;
2375
2376 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2377 if (regcomp(store.value_regex, value_regex,
2378 REG_EXTENDED)) {
2379 error("invalid pattern: %s", value_regex);
2380 free(store.value_regex);
2381 ret = CONFIG_INVALID_PATTERN;
2382 goto out_free;
2383 }
2384 }
2385
2386 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2387 store.offset[0] = 0;
2388 store.state = START;
2389 store.seen = 0;
2390
2391 /*
2392 * After this, store.offset will contain the *end* offset
2393 * of the last match, or remain at 0 if no match was found.
2394 * As a side effect, we make sure to transform only a valid
2395 * existing config file.
2396 */
2397 if (git_config_from_file(store_aux, config_filename, NULL)) {
2398 error("invalid config file %s", config_filename);
2399 free(store.key);
2400 if (store.value_regex != NULL &&
2401 store.value_regex != CONFIG_REGEX_NONE) {
2402 regfree(store.value_regex);
2403 free(store.value_regex);
2404 }
2405 ret = CONFIG_INVALID_FILE;
2406 goto out_free;
2407 }
2408
2409 free(store.key);
2410 if (store.value_regex != NULL &&
2411 store.value_regex != CONFIG_REGEX_NONE) {
2412 regfree(store.value_regex);
2413 free(store.value_regex);
2414 }
2415
2416 /* if nothing to unset, or too many matches, error out */
2417 if ((store.seen == 0 && value == NULL) ||
2418 (store.seen > 1 && multi_replace == 0)) {
2419 ret = CONFIG_NOTHING_SET;
2420 goto out_free;
2421 }
2422
2423 if (fstat(in_fd, &st) == -1) {
2424 error_errno(_("fstat on %s failed"), config_filename);
2425 ret = CONFIG_INVALID_FILE;
2426 goto out_free;
2427 }
2428
2429 contents_sz = xsize_t(st.st_size);
2430 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2431 MAP_PRIVATE, in_fd, 0);
2432 if (contents == MAP_FAILED) {
2433 if (errno == ENODEV && S_ISDIR(st.st_mode))
2434 errno = EISDIR;
2435 error_errno("unable to mmap '%s'", config_filename);
2436 ret = CONFIG_INVALID_FILE;
2437 contents = NULL;
2438 goto out_free;
2439 }
2440 close(in_fd);
2441 in_fd = -1;
2442
2443 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2444 error_errno("chmod on %s failed", get_lock_file_path(lock));
2445 ret = CONFIG_NO_WRITE;
2446 goto out_free;
2447 }
2448
2449 if (store.seen == 0)
2450 store.seen = 1;
2451
2452 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2453 if (store.offset[i] == 0) {
2454 store.offset[i] = copy_end = contents_sz;
2455 } else if (store.state != KEY_SEEN) {
2456 copy_end = store.offset[i];
2457 } else
2458 copy_end = find_beginning_of_line(
2459 contents, contents_sz,
2460 store.offset[i]-2, &new_line);
2461
2462 if (copy_end > 0 && contents[copy_end-1] != '\n')
2463 new_line = 1;
2464
2465 /* write the first part of the config */
2466 if (copy_end > copy_begin) {
2467 if (write_in_full(fd, contents + copy_begin,
2468 copy_end - copy_begin) <
2469 copy_end - copy_begin)
2470 goto write_err_out;
2471 if (new_line &&
2472 write_str_in_full(fd, "\n") != 1)
2473 goto write_err_out;
2474 }
2475 copy_begin = store.offset[i];
2476 }
2477
2478 /* write the pair (value == NULL means unset) */
2479 if (value != NULL) {
2480 if (store.state == START) {
2481 if (!store_write_section(fd, key))
2482 goto write_err_out;
2483 }
2484 if (!store_write_pair(fd, key, value))
2485 goto write_err_out;
2486 }
2487
2488 /* write the rest of the config */
2489 if (copy_begin < contents_sz)
2490 if (write_in_full(fd, contents + copy_begin,
2491 contents_sz - copy_begin) <
2492 contents_sz - copy_begin)
2493 goto write_err_out;
2494
2495 munmap(contents, contents_sz);
2496 contents = NULL;
2497 }
2498
2499 if (commit_lock_file(lock) < 0) {
2500 error_errno("could not write config file %s", config_filename);
2501 ret = CONFIG_NO_WRITE;
2502 lock = NULL;
2503 goto out_free;
2504 }
2505
2506 /*
2507 * lock is committed, so don't try to roll it back below.
2508 * NOTE: Since lockfile.c keeps a linked list of all created
2509 * lock_file structures, it isn't safe to free(lock). It's
2510 * better to just leave it hanging around.
2511 */
2512 lock = NULL;
2513 ret = 0;
2514
2515 /* Invalidate the config cache */
2516 git_config_clear();
2517
2518out_free:
2519 if (lock)
2520 rollback_lock_file(lock);
2521 free(filename_buf);
2522 if (contents)
2523 munmap(contents, contents_sz);
2524 if (in_fd >= 0)
2525 close(in_fd);
2526 return ret;
2527
2528write_err_out:
2529 ret = write_error(get_lock_file_path(lock));
2530 goto out_free;
2531
2532}
2533
2534void git_config_set_multivar_in_file(const char *config_filename,
2535 const char *key, const char *value,
2536 const char *value_regex, int multi_replace)
2537{
2538 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2539 value_regex, multi_replace))
2540 return;
2541 if (value)
2542 die(_("could not set '%s' to '%s'"), key, value);
2543 else
2544 die(_("could not unset '%s'"), key);
2545}
2546
2547int git_config_set_multivar_gently(const char *key, const char *value,
2548 const char *value_regex, int multi_replace)
2549{
2550 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2551 multi_replace);
2552}
2553
2554void git_config_set_multivar(const char *key, const char *value,
2555 const char *value_regex, int multi_replace)
2556{
2557 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2558 multi_replace);
2559}
2560
2561static int section_name_match (const char *buf, const char *name)
2562{
2563 int i = 0, j = 0, dot = 0;
2564 if (buf[i] != '[')
2565 return 0;
2566 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2567 if (!dot && isspace(buf[i])) {
2568 dot = 1;
2569 if (name[j++] != '.')
2570 break;
2571 for (i++; isspace(buf[i]); i++)
2572 ; /* do nothing */
2573 if (buf[i] != '"')
2574 break;
2575 continue;
2576 }
2577 if (buf[i] == '\\' && dot)
2578 i++;
2579 else if (buf[i] == '"' && dot) {
2580 for (i++; isspace(buf[i]); i++)
2581 ; /* do_nothing */
2582 break;
2583 }
2584 if (buf[i] != name[j++])
2585 break;
2586 }
2587 if (buf[i] == ']' && name[j] == 0) {
2588 /*
2589 * We match, now just find the right length offset by
2590 * gobbling up any whitespace after it, as well
2591 */
2592 i++;
2593 for (; buf[i] && isspace(buf[i]); i++)
2594 ; /* do nothing */
2595 return i;
2596 }
2597 return 0;
2598}
2599
2600static int section_name_is_ok(const char *name)
2601{
2602 /* Empty section names are bogus. */
2603 if (!*name)
2604 return 0;
2605
2606 /*
2607 * Before a dot, we must be alphanumeric or dash. After the first dot,
2608 * anything goes, so we can stop checking.
2609 */
2610 for (; *name && *name != '.'; name++)
2611 if (*name != '-' && !isalnum(*name))
2612 return 0;
2613 return 1;
2614}
2615
2616/* if new_name == NULL, the section is removed instead */
2617int git_config_rename_section_in_file(const char *config_filename,
2618 const char *old_name, const char *new_name)
2619{
2620 int ret = 0, remove = 0;
2621 char *filename_buf = NULL;
2622 struct lock_file *lock;
2623 int out_fd;
2624 char buf[1024];
2625 FILE *config_file = NULL;
2626 struct stat st;
2627
2628 if (new_name && !section_name_is_ok(new_name)) {
2629 ret = error("invalid section name: %s", new_name);
2630 goto out_no_rollback;
2631 }
2632
2633 if (!config_filename)
2634 config_filename = filename_buf = git_pathdup("config");
2635
2636 lock = xcalloc(1, sizeof(struct lock_file));
2637 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2638 if (out_fd < 0) {
2639 ret = error("could not lock config file %s", config_filename);
2640 goto out;
2641 }
2642
2643 if (!(config_file = fopen(config_filename, "rb"))) {
2644 /* no config file means nothing to rename, no error */
2645 goto commit_and_out;
2646 }
2647
2648 if (fstat(fileno(config_file), &st) == -1) {
2649 ret = error_errno(_("fstat on %s failed"), config_filename);
2650 goto out;
2651 }
2652
2653 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2654 ret = error_errno("chmod on %s failed",
2655 get_lock_file_path(lock));
2656 goto out;
2657 }
2658
2659 while (fgets(buf, sizeof(buf), config_file)) {
2660 int i;
2661 int length;
2662 char *output = buf;
2663 for (i = 0; buf[i] && isspace(buf[i]); i++)
2664 ; /* do nothing */
2665 if (buf[i] == '[') {
2666 /* it's a section */
2667 int offset = section_name_match(&buf[i], old_name);
2668 if (offset > 0) {
2669 ret++;
2670 if (new_name == NULL) {
2671 remove = 1;
2672 continue;
2673 }
2674 store.baselen = strlen(new_name);
2675 if (!store_write_section(out_fd, new_name)) {
2676 ret = write_error(get_lock_file_path(lock));
2677 goto out;
2678 }
2679 /*
2680 * We wrote out the new section, with
2681 * a newline, now skip the old
2682 * section's length
2683 */
2684 output += offset + i;
2685 if (strlen(output) > 0) {
2686 /*
2687 * More content means there's
2688 * a declaration to put on the
2689 * next line; indent with a
2690 * tab
2691 */
2692 output -= 1;
2693 output[0] = '\t';
2694 }
2695 }
2696 remove = 0;
2697 }
2698 if (remove)
2699 continue;
2700 length = strlen(output);
2701 if (write_in_full(out_fd, output, length) != length) {
2702 ret = write_error(get_lock_file_path(lock));
2703 goto out;
2704 }
2705 }
2706 fclose(config_file);
2707 config_file = NULL;
2708commit_and_out:
2709 if (commit_lock_file(lock) < 0)
2710 ret = error_errno("could not write config file %s",
2711 config_filename);
2712out:
2713 if (config_file)
2714 fclose(config_file);
2715 rollback_lock_file(lock);
2716out_no_rollback:
2717 free(filename_buf);
2718 return ret;
2719}
2720
2721int git_config_rename_section(const char *old_name, const char *new_name)
2722{
2723 return git_config_rename_section_in_file(NULL, old_name, new_name);
2724}
2725
2726/*
2727 * Call this to report error for your variable that should not
2728 * get a boolean value (i.e. "[my] var" means "true").
2729 */
2730#undef config_error_nonbool
2731int config_error_nonbool(const char *var)
2732{
2733 return error("missing value for '%s'", var);
2734}
2735
2736int parse_config_key(const char *var,
2737 const char *section,
2738 const char **subsection, int *subsection_len,
2739 const char **key)
2740{
2741 const char *dot;
2742
2743 /* Does it start with "section." ? */
2744 if (!skip_prefix(var, section, &var) || *var != '.')
2745 return -1;
2746
2747 /*
2748 * Find the key; we don't know yet if we have a subsection, but we must
2749 * parse backwards from the end, since the subsection may have dots in
2750 * it, too.
2751 */
2752 dot = strrchr(var, '.');
2753 *key = dot + 1;
2754
2755 /* Did we have a subsection at all? */
2756 if (dot == var) {
2757 if (subsection) {
2758 *subsection = NULL;
2759 *subsection_len = 0;
2760 }
2761 }
2762 else {
2763 if (!subsection)
2764 return -1;
2765 *subsection = var + 1;
2766 *subsection_len = dot - *subsection;
2767 }
2768
2769 return 0;
2770}
2771
2772const char *current_config_origin_type(void)
2773{
2774 int type;
2775 if (current_config_kvi)
2776 type = current_config_kvi->origin_type;
2777 else if(cf)
2778 type = cf->origin_type;
2779 else
2780 die("BUG: current_config_origin_type called outside config callback");
2781
2782 switch (type) {
2783 case CONFIG_ORIGIN_BLOB:
2784 return "blob";
2785 case CONFIG_ORIGIN_FILE:
2786 return "file";
2787 case CONFIG_ORIGIN_STDIN:
2788 return "standard input";
2789 case CONFIG_ORIGIN_SUBMODULE_BLOB:
2790 return "submodule-blob";
2791 case CONFIG_ORIGIN_CMDLINE:
2792 return "command line";
2793 default:
2794 die("BUG: unknown config origin type");
2795 }
2796}
2797
2798const char *current_config_name(void)
2799{
2800 const char *name;
2801 if (current_config_kvi)
2802 name = current_config_kvi->filename;
2803 else if (cf)
2804 name = cf->name;
2805 else
2806 die("BUG: current_config_name called outside config callback");
2807 return name ? name : "";
2808}
2809
2810enum config_scope current_config_scope(void)
2811{
2812 if (current_config_kvi)
2813 return current_config_kvi->scope;
2814 else
2815 return current_parsing_scope;
2816}