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
17struct config_source {
18 struct config_source *prev;
19 union {
20 FILE *file;
21 struct config_buf {
22 const char *buf;
23 size_t len;
24 size_t pos;
25 } buf;
26 } u;
27 enum config_origin_type origin_type;
28 const char *name;
29 const char *path;
30 int die_on_error;
31 int linenr;
32 int eof;
33 struct strbuf value;
34 struct strbuf var;
35
36 int (*do_fgetc)(struct config_source *c);
37 int (*do_ungetc)(int c, struct config_source *conf);
38 long (*do_ftell)(struct config_source *c);
39};
40
41/*
42 * These variables record the "current" config source, which
43 * can be accessed by parsing callbacks.
44 *
45 * The "cf" variable will be non-NULL only when we are actually parsing a real
46 * config source (file, blob, cmdline, etc).
47 *
48 * The "current_config_kvi" variable will be non-NULL only when we are feeding
49 * cached config from a configset into a callback.
50 *
51 * They should generally never be non-NULL at the same time. If they are both
52 * NULL, then we aren't parsing anything (and depending on the function looking
53 * at the variables, it's either a bug for it to be called in the first place,
54 * or it's a function which can be reused for non-config purposes, and should
55 * fall back to some sane behavior).
56 */
57static struct config_source *cf;
58static struct key_value_info *current_config_kvi;
59
60/*
61 * Similar to the variables above, this gives access to the "scope" of the
62 * current value (repo, global, etc). For cached values, it can be found via
63 * the current_config_kvi as above. During parsing, the current value can be
64 * found in this variable. It's not part of "cf" because it transcends a single
65 * file (i.e., a file included from .git/config is still in "repo" scope).
66 */
67static enum config_scope current_parsing_scope;
68
69static int zlib_compression_seen;
70
71/*
72 * Default config_set that contains key-value pairs from the usual set of config
73 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
74 * config file and the global /etc/gitconfig)
75 */
76static struct config_set the_config_set;
77
78static int config_file_fgetc(struct config_source *conf)
79{
80 return getc_unlocked(conf->u.file);
81}
82
83static int config_file_ungetc(int c, struct config_source *conf)
84{
85 return ungetc(c, conf->u.file);
86}
87
88static long config_file_ftell(struct config_source *conf)
89{
90 return ftell(conf->u.file);
91}
92
93
94static int config_buf_fgetc(struct config_source *conf)
95{
96 if (conf->u.buf.pos < conf->u.buf.len)
97 return conf->u.buf.buf[conf->u.buf.pos++];
98
99 return EOF;
100}
101
102static int config_buf_ungetc(int c, struct config_source *conf)
103{
104 if (conf->u.buf.pos > 0) {
105 conf->u.buf.pos--;
106 if (conf->u.buf.buf[conf->u.buf.pos] != c)
107 die("BUG: config_buf can only ungetc the same character");
108 return c;
109 }
110
111 return EOF;
112}
113
114static long config_buf_ftell(struct config_source *conf)
115{
116 return conf->u.buf.pos;
117}
118
119#define MAX_INCLUDE_DEPTH 10
120static const char include_depth_advice[] =
121"exceeded maximum include depth (%d) while including\n"
122" %s\n"
123"from\n"
124" %s\n"
125"Do you have circular includes?";
126static int handle_path_include(const char *path, struct config_include_data *inc)
127{
128 int ret = 0;
129 struct strbuf buf = STRBUF_INIT;
130 char *expanded;
131
132 if (!path)
133 return config_error_nonbool("include.path");
134
135 expanded = expand_user_path(path);
136 if (!expanded)
137 return error("could not expand include path '%s'", path);
138 path = expanded;
139
140 /*
141 * Use an absolute path as-is, but interpret relative paths
142 * based on the including config file.
143 */
144 if (!is_absolute_path(path)) {
145 char *slash;
146
147 if (!cf || !cf->path)
148 return error("relative config includes must come from files");
149
150 slash = find_last_dir_sep(cf->path);
151 if (slash)
152 strbuf_add(&buf, cf->path, slash - cf->path + 1);
153 strbuf_addstr(&buf, path);
154 path = buf.buf;
155 }
156
157 if (!access_or_die(path, R_OK, 0)) {
158 if (++inc->depth > MAX_INCLUDE_DEPTH)
159 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
160 !cf ? "<unknown>" :
161 cf->name ? cf->name :
162 "the command line");
163 ret = git_config_from_file(git_config_include, path, inc);
164 inc->depth--;
165 }
166 strbuf_release(&buf);
167 free(expanded);
168 return ret;
169}
170
171int git_config_include(const char *var, const char *value, void *data)
172{
173 struct config_include_data *inc = data;
174 int ret;
175
176 /*
177 * Pass along all values, including "include" directives; this makes it
178 * possible to query information on the includes themselves.
179 */
180 ret = inc->fn(var, value, inc->data);
181 if (ret < 0)
182 return ret;
183
184 if (!strcmp(var, "include.path"))
185 ret = handle_path_include(value, inc);
186 return ret;
187}
188
189void git_config_push_parameter(const char *text)
190{
191 struct strbuf env = STRBUF_INIT;
192 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
193 if (old && *old) {
194 strbuf_addstr(&env, old);
195 strbuf_addch(&env, ' ');
196 }
197 sq_quote_buf(&env, text);
198 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
199 strbuf_release(&env);
200}
201
202static inline int iskeychar(int c)
203{
204 return isalnum(c) || c == '-';
205}
206
207/*
208 * Auxiliary function to sanity-check and split the key into the section
209 * identifier and variable name.
210 *
211 * Returns 0 on success, -1 when there is an invalid character in the key and
212 * -2 if there is no section name in the key.
213 *
214 * store_key - pointer to char* which will hold a copy of the key with
215 * lowercase section and variable name
216 * baselen - pointer to int which will hold the length of the
217 * section + subsection part, can be NULL
218 */
219static int git_config_parse_key_1(const char *key, char **store_key, int *baselen_, int quiet)
220{
221 int i, dot, baselen;
222 const char *last_dot = strrchr(key, '.');
223
224 /*
225 * Since "key" actually contains the section name and the real
226 * key name separated by a dot, we have to know where the dot is.
227 */
228
229 if (last_dot == NULL || last_dot == key) {
230 if (!quiet)
231 error("key does not contain a section: %s", key);
232 return -CONFIG_NO_SECTION_OR_NAME;
233 }
234
235 if (!last_dot[1]) {
236 if (!quiet)
237 error("key does not contain variable name: %s", key);
238 return -CONFIG_NO_SECTION_OR_NAME;
239 }
240
241 baselen = last_dot - key;
242 if (baselen_)
243 *baselen_ = baselen;
244
245 /*
246 * Validate the key and while at it, lower case it for matching.
247 */
248 if (store_key)
249 *store_key = xmallocz(strlen(key));
250
251 dot = 0;
252 for (i = 0; key[i]; i++) {
253 unsigned char c = key[i];
254 if (c == '.')
255 dot = 1;
256 /* Leave the extended basename untouched.. */
257 if (!dot || i > baselen) {
258 if (!iskeychar(c) ||
259 (i == baselen + 1 && !isalpha(c))) {
260 if (!quiet)
261 error("invalid key: %s", key);
262 goto out_free_ret_1;
263 }
264 c = tolower(c);
265 } else if (c == '\n') {
266 if (!quiet)
267 error("invalid key (newline): %s", key);
268 goto out_free_ret_1;
269 }
270 if (store_key)
271 (*store_key)[i] = c;
272 }
273
274 return 0;
275
276out_free_ret_1:
277 if (store_key) {
278 free(*store_key);
279 *store_key = NULL;
280 }
281 return -CONFIG_INVALID_KEY;
282}
283
284int git_config_parse_key(const char *key, char **store_key, int *baselen)
285{
286 return git_config_parse_key_1(key, store_key, baselen, 0);
287}
288
289int git_config_key_is_valid(const char *key)
290{
291 return !git_config_parse_key_1(key, NULL, NULL, 1);
292}
293
294int git_config_parse_parameter(const char *text,
295 config_fn_t fn, void *data)
296{
297 const char *value;
298 char *canonical_name;
299 struct strbuf **pair;
300 int ret;
301
302 pair = strbuf_split_str(text, '=', 2);
303 if (!pair[0])
304 return error("bogus config parameter: %s", text);
305
306 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
307 strbuf_setlen(pair[0], pair[0]->len - 1);
308 value = pair[1] ? pair[1]->buf : "";
309 } else {
310 value = NULL;
311 }
312
313 strbuf_trim(pair[0]);
314 if (!pair[0]->len) {
315 strbuf_list_free(pair);
316 return error("bogus config parameter: %s", text);
317 }
318
319 if (git_config_parse_key(pair[0]->buf, &canonical_name, NULL)) {
320 ret = -1;
321 } else {
322 ret = (fn(canonical_name, value, data) < 0) ? -1 : 0;
323 free(canonical_name);
324 }
325 strbuf_list_free(pair);
326 return ret;
327}
328
329int git_config_from_parameters(config_fn_t fn, void *data)
330{
331 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
332 int ret = 0;
333 char *envw;
334 const char **argv = NULL;
335 int nr = 0, alloc = 0;
336 int i;
337 struct config_source source;
338
339 if (!env)
340 return 0;
341
342 memset(&source, 0, sizeof(source));
343 source.prev = cf;
344 source.origin_type = CONFIG_ORIGIN_CMDLINE;
345 cf = &source;
346
347 /* sq_dequote will write over it */
348 envw = xstrdup(env);
349
350 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
351 ret = error("bogus format in " CONFIG_DATA_ENVIRONMENT);
352 goto out;
353 }
354
355 for (i = 0; i < nr; i++) {
356 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
357 ret = -1;
358 goto out;
359 }
360 }
361
362out:
363 free(argv);
364 free(envw);
365 cf = source.prev;
366 return ret;
367}
368
369static int get_next_char(void)
370{
371 int c = cf->do_fgetc(cf);
372
373 if (c == '\r') {
374 /* DOS like systems */
375 c = cf->do_fgetc(cf);
376 if (c != '\n') {
377 if (c != EOF)
378 cf->do_ungetc(c, cf);
379 c = '\r';
380 }
381 }
382 if (c == '\n')
383 cf->linenr++;
384 if (c == EOF) {
385 cf->eof = 1;
386 cf->linenr++;
387 c = '\n';
388 }
389 return c;
390}
391
392static char *parse_value(void)
393{
394 int quote = 0, comment = 0, space = 0;
395
396 strbuf_reset(&cf->value);
397 for (;;) {
398 int c = get_next_char();
399 if (c == '\n') {
400 if (quote) {
401 cf->linenr--;
402 return NULL;
403 }
404 return cf->value.buf;
405 }
406 if (comment)
407 continue;
408 if (isspace(c) && !quote) {
409 if (cf->value.len)
410 space++;
411 continue;
412 }
413 if (!quote) {
414 if (c == ';' || c == '#') {
415 comment = 1;
416 continue;
417 }
418 }
419 for (; space; space--)
420 strbuf_addch(&cf->value, ' ');
421 if (c == '\\') {
422 c = get_next_char();
423 switch (c) {
424 case '\n':
425 continue;
426 case 't':
427 c = '\t';
428 break;
429 case 'b':
430 c = '\b';
431 break;
432 case 'n':
433 c = '\n';
434 break;
435 /* Some characters escape as themselves */
436 case '\\': case '"':
437 break;
438 /* Reject unknown escape sequences */
439 default:
440 return NULL;
441 }
442 strbuf_addch(&cf->value, c);
443 continue;
444 }
445 if (c == '"') {
446 quote = 1-quote;
447 continue;
448 }
449 strbuf_addch(&cf->value, c);
450 }
451}
452
453static int get_value(config_fn_t fn, void *data, struct strbuf *name)
454{
455 int c;
456 char *value;
457 int ret;
458
459 /* Get the full name */
460 for (;;) {
461 c = get_next_char();
462 if (cf->eof)
463 break;
464 if (!iskeychar(c))
465 break;
466 strbuf_addch(name, tolower(c));
467 }
468
469 while (c == ' ' || c == '\t')
470 c = get_next_char();
471
472 value = NULL;
473 if (c != '\n') {
474 if (c != '=')
475 return -1;
476 value = parse_value();
477 if (!value)
478 return -1;
479 }
480 /*
481 * We already consumed the \n, but we need linenr to point to
482 * the line we just parsed during the call to fn to get
483 * accurate line number in error messages.
484 */
485 cf->linenr--;
486 ret = fn(name->buf, value, data);
487 cf->linenr++;
488 return ret;
489}
490
491static int get_extended_base_var(struct strbuf *name, int c)
492{
493 do {
494 if (c == '\n')
495 goto error_incomplete_line;
496 c = get_next_char();
497 } while (isspace(c));
498
499 /* We require the format to be '[base "extension"]' */
500 if (c != '"')
501 return -1;
502 strbuf_addch(name, '.');
503
504 for (;;) {
505 int c = get_next_char();
506 if (c == '\n')
507 goto error_incomplete_line;
508 if (c == '"')
509 break;
510 if (c == '\\') {
511 c = get_next_char();
512 if (c == '\n')
513 goto error_incomplete_line;
514 }
515 strbuf_addch(name, c);
516 }
517
518 /* Final ']' */
519 if (get_next_char() != ']')
520 return -1;
521 return 0;
522error_incomplete_line:
523 cf->linenr--;
524 return -1;
525}
526
527static int get_base_var(struct strbuf *name)
528{
529 for (;;) {
530 int c = get_next_char();
531 if (cf->eof)
532 return -1;
533 if (c == ']')
534 return 0;
535 if (isspace(c))
536 return get_extended_base_var(name, c);
537 if (!iskeychar(c) && c != '.')
538 return -1;
539 strbuf_addch(name, tolower(c));
540 }
541}
542
543static int git_parse_source(config_fn_t fn, void *data)
544{
545 int comment = 0;
546 int baselen = 0;
547 struct strbuf *var = &cf->var;
548 int error_return = 0;
549 char *error_msg = NULL;
550
551 /* U+FEFF Byte Order Mark in UTF8 */
552 const char *bomptr = utf8_bom;
553
554 for (;;) {
555 int c = get_next_char();
556 if (bomptr && *bomptr) {
557 /* We are at the file beginning; skip UTF8-encoded BOM
558 * if present. Sane editors won't put this in on their
559 * own, but e.g. Windows Notepad will do it happily. */
560 if (c == (*bomptr & 0377)) {
561 bomptr++;
562 continue;
563 } else {
564 /* Do not tolerate partial BOM. */
565 if (bomptr != utf8_bom)
566 break;
567 /* No BOM at file beginning. Cool. */
568 bomptr = NULL;
569 }
570 }
571 if (c == '\n') {
572 if (cf->eof)
573 return 0;
574 comment = 0;
575 continue;
576 }
577 if (comment || isspace(c))
578 continue;
579 if (c == '#' || c == ';') {
580 comment = 1;
581 continue;
582 }
583 if (c == '[') {
584 /* Reset prior to determining a new stem */
585 strbuf_reset(var);
586 if (get_base_var(var) < 0 || var->len < 1)
587 break;
588 strbuf_addch(var, '.');
589 baselen = var->len;
590 continue;
591 }
592 if (!isalpha(c))
593 break;
594 /*
595 * Truncate the var name back to the section header
596 * stem prior to grabbing the suffix part of the name
597 * and the value.
598 */
599 strbuf_setlen(var, baselen);
600 strbuf_addch(var, tolower(c));
601 if (get_value(fn, data, var) < 0)
602 break;
603 }
604
605 switch (cf->origin_type) {
606 case CONFIG_ORIGIN_BLOB:
607 error_msg = xstrfmt(_("bad config line %d in blob %s"),
608 cf->linenr, cf->name);
609 break;
610 case CONFIG_ORIGIN_FILE:
611 error_msg = xstrfmt(_("bad config line %d in file %s"),
612 cf->linenr, cf->name);
613 break;
614 case CONFIG_ORIGIN_STDIN:
615 error_msg = xstrfmt(_("bad config line %d in standard input"),
616 cf->linenr);
617 break;
618 case CONFIG_ORIGIN_SUBMODULE_BLOB:
619 error_msg = xstrfmt(_("bad config line %d in submodule-blob %s"),
620 cf->linenr, cf->name);
621 break;
622 case CONFIG_ORIGIN_CMDLINE:
623 error_msg = xstrfmt(_("bad config line %d in command line %s"),
624 cf->linenr, cf->name);
625 break;
626 default:
627 error_msg = xstrfmt(_("bad config line %d in %s"),
628 cf->linenr, cf->name);
629 }
630
631 if (cf->die_on_error)
632 die("%s", error_msg);
633 else
634 error_return = error("%s", error_msg);
635
636 free(error_msg);
637 return error_return;
638}
639
640static int parse_unit_factor(const char *end, uintmax_t *val)
641{
642 if (!*end)
643 return 1;
644 else if (!strcasecmp(end, "k")) {
645 *val *= 1024;
646 return 1;
647 }
648 else if (!strcasecmp(end, "m")) {
649 *val *= 1024 * 1024;
650 return 1;
651 }
652 else if (!strcasecmp(end, "g")) {
653 *val *= 1024 * 1024 * 1024;
654 return 1;
655 }
656 return 0;
657}
658
659static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
660{
661 if (value && *value) {
662 char *end;
663 intmax_t val;
664 uintmax_t uval;
665 uintmax_t factor = 1;
666
667 errno = 0;
668 val = strtoimax(value, &end, 0);
669 if (errno == ERANGE)
670 return 0;
671 if (!parse_unit_factor(end, &factor)) {
672 errno = EINVAL;
673 return 0;
674 }
675 uval = labs(val);
676 uval *= factor;
677 if (uval > max || labs(val) > uval) {
678 errno = ERANGE;
679 return 0;
680 }
681 val *= factor;
682 *ret = val;
683 return 1;
684 }
685 errno = EINVAL;
686 return 0;
687}
688
689static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
690{
691 if (value && *value) {
692 char *end;
693 uintmax_t val;
694 uintmax_t oldval;
695
696 errno = 0;
697 val = strtoumax(value, &end, 0);
698 if (errno == ERANGE)
699 return 0;
700 oldval = val;
701 if (!parse_unit_factor(end, &val)) {
702 errno = EINVAL;
703 return 0;
704 }
705 if (val > max || oldval > val) {
706 errno = ERANGE;
707 return 0;
708 }
709 *ret = val;
710 return 1;
711 }
712 errno = EINVAL;
713 return 0;
714}
715
716static int git_parse_int(const char *value, int *ret)
717{
718 intmax_t tmp;
719 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
720 return 0;
721 *ret = tmp;
722 return 1;
723}
724
725static int git_parse_int64(const char *value, int64_t *ret)
726{
727 intmax_t tmp;
728 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
729 return 0;
730 *ret = tmp;
731 return 1;
732}
733
734int git_parse_ulong(const char *value, unsigned long *ret)
735{
736 uintmax_t tmp;
737 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
738 return 0;
739 *ret = tmp;
740 return 1;
741}
742
743NORETURN
744static void die_bad_number(const char *name, const char *value)
745{
746 const char * error_type = (errno == ERANGE)? _("out of range"):_("invalid unit");
747
748 if (!value)
749 value = "";
750
751 if (!(cf && cf->name))
752 die(_("bad numeric config value '%s' for '%s': %s"),
753 value, name, error_type);
754
755 switch (cf->origin_type) {
756 case CONFIG_ORIGIN_BLOB:
757 die(_("bad numeric config value '%s' for '%s' in blob %s: %s"),
758 value, name, cf->name, error_type);
759 case CONFIG_ORIGIN_FILE:
760 die(_("bad numeric config value '%s' for '%s' in file %s: %s"),
761 value, name, cf->name, error_type);
762 case CONFIG_ORIGIN_STDIN:
763 die(_("bad numeric config value '%s' for '%s' in standard input: %s"),
764 value, name, error_type);
765 case CONFIG_ORIGIN_SUBMODULE_BLOB:
766 die(_("bad numeric config value '%s' for '%s' in submodule-blob %s: %s"),
767 value, name, cf->name, error_type);
768 case CONFIG_ORIGIN_CMDLINE:
769 die(_("bad numeric config value '%s' for '%s' in command line %s: %s"),
770 value, name, cf->name, error_type);
771 default:
772 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
773 value, name, cf->name, error_type);
774 }
775}
776
777int git_config_int(const char *name, const char *value)
778{
779 int ret;
780 if (!git_parse_int(value, &ret))
781 die_bad_number(name, value);
782 return ret;
783}
784
785int64_t git_config_int64(const char *name, const char *value)
786{
787 int64_t ret;
788 if (!git_parse_int64(value, &ret))
789 die_bad_number(name, value);
790 return ret;
791}
792
793unsigned long git_config_ulong(const char *name, const char *value)
794{
795 unsigned long ret;
796 if (!git_parse_ulong(value, &ret))
797 die_bad_number(name, value);
798 return ret;
799}
800
801int git_parse_maybe_bool(const char *value)
802{
803 if (!value)
804 return 1;
805 if (!*value)
806 return 0;
807 if (!strcasecmp(value, "true")
808 || !strcasecmp(value, "yes")
809 || !strcasecmp(value, "on"))
810 return 1;
811 if (!strcasecmp(value, "false")
812 || !strcasecmp(value, "no")
813 || !strcasecmp(value, "off"))
814 return 0;
815 return -1;
816}
817
818int git_config_maybe_bool(const char *name, const char *value)
819{
820 int v = git_parse_maybe_bool(value);
821 if (0 <= v)
822 return v;
823 if (git_parse_int(value, &v))
824 return !!v;
825 return -1;
826}
827
828int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
829{
830 int v = git_parse_maybe_bool(value);
831 if (0 <= v) {
832 *is_bool = 1;
833 return v;
834 }
835 *is_bool = 0;
836 return git_config_int(name, value);
837}
838
839int git_config_bool(const char *name, const char *value)
840{
841 int discard;
842 return !!git_config_bool_or_int(name, value, &discard);
843}
844
845int git_config_string(const char **dest, const char *var, const char *value)
846{
847 if (!value)
848 return config_error_nonbool(var);
849 *dest = xstrdup(value);
850 return 0;
851}
852
853int git_config_pathname(const char **dest, const char *var, const char *value)
854{
855 if (!value)
856 return config_error_nonbool(var);
857 *dest = expand_user_path(value);
858 if (!*dest)
859 die(_("failed to expand user dir in: '%s'"), value);
860 return 0;
861}
862
863static int git_default_core_config(const char *var, const char *value)
864{
865 /* This needs a better name */
866 if (!strcmp(var, "core.filemode")) {
867 trust_executable_bit = git_config_bool(var, value);
868 return 0;
869 }
870 if (!strcmp(var, "core.trustctime")) {
871 trust_ctime = git_config_bool(var, value);
872 return 0;
873 }
874 if (!strcmp(var, "core.checkstat")) {
875 if (!strcasecmp(value, "default"))
876 check_stat = 1;
877 else if (!strcasecmp(value, "minimal"))
878 check_stat = 0;
879 }
880
881 if (!strcmp(var, "core.quotepath")) {
882 quote_path_fully = git_config_bool(var, value);
883 return 0;
884 }
885
886 if (!strcmp(var, "core.symlinks")) {
887 has_symlinks = git_config_bool(var, value);
888 return 0;
889 }
890
891 if (!strcmp(var, "core.ignorecase")) {
892 ignore_case = git_config_bool(var, value);
893 return 0;
894 }
895
896 if (!strcmp(var, "core.attributesfile"))
897 return git_config_pathname(&git_attributes_file, var, value);
898
899 if (!strcmp(var, "core.hookspath"))
900 return git_config_pathname(&git_hooks_path, var, value);
901
902 if (!strcmp(var, "core.bare")) {
903 is_bare_repository_cfg = git_config_bool(var, value);
904 return 0;
905 }
906
907 if (!strcmp(var, "core.ignorestat")) {
908 assume_unchanged = git_config_bool(var, value);
909 return 0;
910 }
911
912 if (!strcmp(var, "core.prefersymlinkrefs")) {
913 prefer_symlink_refs = git_config_bool(var, value);
914 return 0;
915 }
916
917 if (!strcmp(var, "core.logallrefupdates")) {
918 log_all_ref_updates = git_config_bool(var, value);
919 return 0;
920 }
921
922 if (!strcmp(var, "core.warnambiguousrefs")) {
923 warn_ambiguous_refs = git_config_bool(var, value);
924 return 0;
925 }
926
927 if (!strcmp(var, "core.abbrev")) {
928 int abbrev = git_config_int(var, value);
929 if (abbrev < minimum_abbrev || abbrev > 40)
930 return -1;
931 default_abbrev = abbrev;
932 return 0;
933 }
934
935 if (!strcmp(var, "core.loosecompression")) {
936 int level = git_config_int(var, value);
937 if (level == -1)
938 level = Z_DEFAULT_COMPRESSION;
939 else if (level < 0 || level > Z_BEST_COMPRESSION)
940 die(_("bad zlib compression level %d"), level);
941 zlib_compression_level = level;
942 zlib_compression_seen = 1;
943 return 0;
944 }
945
946 if (!strcmp(var, "core.compression")) {
947 int level = git_config_int(var, value);
948 if (level == -1)
949 level = Z_DEFAULT_COMPRESSION;
950 else if (level < 0 || level > Z_BEST_COMPRESSION)
951 die(_("bad zlib compression level %d"), level);
952 core_compression_level = level;
953 core_compression_seen = 1;
954 if (!zlib_compression_seen)
955 zlib_compression_level = level;
956 return 0;
957 }
958
959 if (!strcmp(var, "core.packedgitwindowsize")) {
960 int pgsz_x2 = getpagesize() * 2;
961 packed_git_window_size = git_config_ulong(var, value);
962
963 /* This value must be multiple of (pagesize * 2) */
964 packed_git_window_size /= pgsz_x2;
965 if (packed_git_window_size < 1)
966 packed_git_window_size = 1;
967 packed_git_window_size *= pgsz_x2;
968 return 0;
969 }
970
971 if (!strcmp(var, "core.bigfilethreshold")) {
972 big_file_threshold = git_config_ulong(var, value);
973 return 0;
974 }
975
976 if (!strcmp(var, "core.packedgitlimit")) {
977 packed_git_limit = git_config_ulong(var, value);
978 return 0;
979 }
980
981 if (!strcmp(var, "core.deltabasecachelimit")) {
982 delta_base_cache_limit = git_config_ulong(var, value);
983 return 0;
984 }
985
986 if (!strcmp(var, "core.autocrlf")) {
987 if (value && !strcasecmp(value, "input")) {
988 auto_crlf = AUTO_CRLF_INPUT;
989 return 0;
990 }
991 auto_crlf = git_config_bool(var, value);
992 return 0;
993 }
994
995 if (!strcmp(var, "core.safecrlf")) {
996 if (value && !strcasecmp(value, "warn")) {
997 safe_crlf = SAFE_CRLF_WARN;
998 return 0;
999 }
1000 safe_crlf = git_config_bool(var, value);
1001 return 0;
1002 }
1003
1004 if (!strcmp(var, "core.eol")) {
1005 if (value && !strcasecmp(value, "lf"))
1006 core_eol = EOL_LF;
1007 else if (value && !strcasecmp(value, "crlf"))
1008 core_eol = EOL_CRLF;
1009 else if (value && !strcasecmp(value, "native"))
1010 core_eol = EOL_NATIVE;
1011 else
1012 core_eol = EOL_UNSET;
1013 return 0;
1014 }
1015
1016 if (!strcmp(var, "core.notesref")) {
1017 notes_ref_name = xstrdup(value);
1018 return 0;
1019 }
1020
1021 if (!strcmp(var, "core.pager"))
1022 return git_config_string(&pager_program, var, value);
1023
1024 if (!strcmp(var, "core.editor"))
1025 return git_config_string(&editor_program, var, value);
1026
1027 if (!strcmp(var, "core.commentchar")) {
1028 if (!value)
1029 return config_error_nonbool(var);
1030 else if (!strcasecmp(value, "auto"))
1031 auto_comment_line_char = 1;
1032 else if (value[0] && !value[1]) {
1033 comment_line_char = value[0];
1034 auto_comment_line_char = 0;
1035 } else
1036 return error("core.commentChar should only be one character");
1037 return 0;
1038 }
1039
1040 if (!strcmp(var, "core.askpass"))
1041 return git_config_string(&askpass_program, var, value);
1042
1043 if (!strcmp(var, "core.excludesfile"))
1044 return git_config_pathname(&excludes_file, var, value);
1045
1046 if (!strcmp(var, "core.whitespace")) {
1047 if (!value)
1048 return config_error_nonbool(var);
1049 whitespace_rule_cfg = parse_whitespace_rule(value);
1050 return 0;
1051 }
1052
1053 if (!strcmp(var, "core.fsyncobjectfiles")) {
1054 fsync_object_files = git_config_bool(var, value);
1055 return 0;
1056 }
1057
1058 if (!strcmp(var, "core.preloadindex")) {
1059 core_preload_index = git_config_bool(var, value);
1060 return 0;
1061 }
1062
1063 if (!strcmp(var, "core.createobject")) {
1064 if (!strcmp(value, "rename"))
1065 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
1066 else if (!strcmp(value, "link"))
1067 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
1068 else
1069 die(_("invalid mode for object creation: %s"), value);
1070 return 0;
1071 }
1072
1073 if (!strcmp(var, "core.sparsecheckout")) {
1074 core_apply_sparse_checkout = git_config_bool(var, value);
1075 return 0;
1076 }
1077
1078 if (!strcmp(var, "core.precomposeunicode")) {
1079 precomposed_unicode = git_config_bool(var, value);
1080 return 0;
1081 }
1082
1083 if (!strcmp(var, "core.protecthfs")) {
1084 protect_hfs = git_config_bool(var, value);
1085 return 0;
1086 }
1087
1088 if (!strcmp(var, "core.protectntfs")) {
1089 protect_ntfs = git_config_bool(var, value);
1090 return 0;
1091 }
1092
1093 if (!strcmp(var, "core.hidedotfiles")) {
1094 if (value && !strcasecmp(value, "dotgitonly"))
1095 hide_dotfiles = HIDE_DOTFILES_DOTGITONLY;
1096 else
1097 hide_dotfiles = git_config_bool(var, value);
1098 return 0;
1099 }
1100
1101 /* Add other config variables here and to Documentation/config.txt. */
1102 return 0;
1103}
1104
1105static int git_default_i18n_config(const char *var, const char *value)
1106{
1107 if (!strcmp(var, "i18n.commitencoding"))
1108 return git_config_string(&git_commit_encoding, var, value);
1109
1110 if (!strcmp(var, "i18n.logoutputencoding"))
1111 return git_config_string(&git_log_output_encoding, var, value);
1112
1113 /* Add other config variables here and to Documentation/config.txt. */
1114 return 0;
1115}
1116
1117static int git_default_branch_config(const char *var, const char *value)
1118{
1119 if (!strcmp(var, "branch.autosetupmerge")) {
1120 if (value && !strcasecmp(value, "always")) {
1121 git_branch_track = BRANCH_TRACK_ALWAYS;
1122 return 0;
1123 }
1124 git_branch_track = git_config_bool(var, value);
1125 return 0;
1126 }
1127 if (!strcmp(var, "branch.autosetuprebase")) {
1128 if (!value)
1129 return config_error_nonbool(var);
1130 else if (!strcmp(value, "never"))
1131 autorebase = AUTOREBASE_NEVER;
1132 else if (!strcmp(value, "local"))
1133 autorebase = AUTOREBASE_LOCAL;
1134 else if (!strcmp(value, "remote"))
1135 autorebase = AUTOREBASE_REMOTE;
1136 else if (!strcmp(value, "always"))
1137 autorebase = AUTOREBASE_ALWAYS;
1138 else
1139 return error("malformed value for %s", var);
1140 return 0;
1141 }
1142
1143 /* Add other config variables here and to Documentation/config.txt. */
1144 return 0;
1145}
1146
1147static int git_default_push_config(const char *var, const char *value)
1148{
1149 if (!strcmp(var, "push.default")) {
1150 if (!value)
1151 return config_error_nonbool(var);
1152 else if (!strcmp(value, "nothing"))
1153 push_default = PUSH_DEFAULT_NOTHING;
1154 else if (!strcmp(value, "matching"))
1155 push_default = PUSH_DEFAULT_MATCHING;
1156 else if (!strcmp(value, "simple"))
1157 push_default = PUSH_DEFAULT_SIMPLE;
1158 else if (!strcmp(value, "upstream"))
1159 push_default = PUSH_DEFAULT_UPSTREAM;
1160 else if (!strcmp(value, "tracking")) /* deprecated */
1161 push_default = PUSH_DEFAULT_UPSTREAM;
1162 else if (!strcmp(value, "current"))
1163 push_default = PUSH_DEFAULT_CURRENT;
1164 else {
1165 error("malformed value for %s: %s", var, value);
1166 return error("Must be one of nothing, matching, simple, "
1167 "upstream or current.");
1168 }
1169 return 0;
1170 }
1171
1172 /* Add other config variables here and to Documentation/config.txt. */
1173 return 0;
1174}
1175
1176static int git_default_mailmap_config(const char *var, const char *value)
1177{
1178 if (!strcmp(var, "mailmap.file"))
1179 return git_config_pathname(&git_mailmap_file, var, value);
1180 if (!strcmp(var, "mailmap.blob"))
1181 return git_config_string(&git_mailmap_blob, var, value);
1182
1183 /* Add other config variables here and to Documentation/config.txt. */
1184 return 0;
1185}
1186
1187int git_default_config(const char *var, const char *value, void *dummy)
1188{
1189 if (starts_with(var, "core."))
1190 return git_default_core_config(var, value);
1191
1192 if (starts_with(var, "user."))
1193 return git_ident_config(var, value, dummy);
1194
1195 if (starts_with(var, "i18n."))
1196 return git_default_i18n_config(var, value);
1197
1198 if (starts_with(var, "branch."))
1199 return git_default_branch_config(var, value);
1200
1201 if (starts_with(var, "push."))
1202 return git_default_push_config(var, value);
1203
1204 if (starts_with(var, "mailmap."))
1205 return git_default_mailmap_config(var, value);
1206
1207 if (starts_with(var, "advice."))
1208 return git_default_advice_config(var, value);
1209
1210 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1211 pager_use_color = git_config_bool(var,value);
1212 return 0;
1213 }
1214
1215 if (!strcmp(var, "pack.packsizelimit")) {
1216 pack_size_limit_cfg = git_config_ulong(var, value);
1217 return 0;
1218 }
1219 /* Add other config variables here and to Documentation/config.txt. */
1220 return 0;
1221}
1222
1223/*
1224 * All source specific fields in the union, die_on_error, name and the callbacks
1225 * fgetc, ungetc, ftell of top need to be initialized before calling
1226 * this function.
1227 */
1228static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1229{
1230 int ret;
1231
1232 /* push config-file parsing state stack */
1233 top->prev = cf;
1234 top->linenr = 1;
1235 top->eof = 0;
1236 strbuf_init(&top->value, 1024);
1237 strbuf_init(&top->var, 1024);
1238 cf = top;
1239
1240 ret = git_parse_source(fn, data);
1241
1242 /* pop config-file parsing state stack */
1243 strbuf_release(&top->value);
1244 strbuf_release(&top->var);
1245 cf = top->prev;
1246
1247 return ret;
1248}
1249
1250static int do_config_from_file(config_fn_t fn,
1251 const enum config_origin_type origin_type,
1252 const char *name, const char *path, FILE *f,
1253 void *data)
1254{
1255 struct config_source top;
1256
1257 top.u.file = f;
1258 top.origin_type = origin_type;
1259 top.name = name;
1260 top.path = path;
1261 top.die_on_error = 1;
1262 top.do_fgetc = config_file_fgetc;
1263 top.do_ungetc = config_file_ungetc;
1264 top.do_ftell = config_file_ftell;
1265
1266 return do_config_from(&top, fn, data);
1267}
1268
1269static int git_config_from_stdin(config_fn_t fn, void *data)
1270{
1271 return do_config_from_file(fn, CONFIG_ORIGIN_STDIN, "", NULL, stdin, data);
1272}
1273
1274int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1275{
1276 int ret = -1;
1277 FILE *f;
1278
1279 f = fopen(filename, "r");
1280 if (f) {
1281 flockfile(f);
1282 ret = do_config_from_file(fn, CONFIG_ORIGIN_FILE, filename, filename, f, data);
1283 funlockfile(f);
1284 fclose(f);
1285 }
1286 return ret;
1287}
1288
1289int git_config_from_mem(config_fn_t fn, const enum config_origin_type origin_type,
1290 const char *name, const char *buf, size_t len, void *data)
1291{
1292 struct config_source top;
1293
1294 top.u.buf.buf = buf;
1295 top.u.buf.len = len;
1296 top.u.buf.pos = 0;
1297 top.origin_type = origin_type;
1298 top.name = name;
1299 top.path = NULL;
1300 top.die_on_error = 0;
1301 top.do_fgetc = config_buf_fgetc;
1302 top.do_ungetc = config_buf_ungetc;
1303 top.do_ftell = config_buf_ftell;
1304
1305 return do_config_from(&top, fn, data);
1306}
1307
1308static int git_config_from_blob_sha1(config_fn_t fn,
1309 const char *name,
1310 const unsigned char *sha1,
1311 void *data)
1312{
1313 enum object_type type;
1314 char *buf;
1315 unsigned long size;
1316 int ret;
1317
1318 buf = read_sha1_file(sha1, &type, &size);
1319 if (!buf)
1320 return error("unable to load config blob object '%s'", name);
1321 if (type != OBJ_BLOB) {
1322 free(buf);
1323 return error("reference '%s' does not point to a blob", name);
1324 }
1325
1326 ret = git_config_from_mem(fn, CONFIG_ORIGIN_BLOB, name, buf, size, data);
1327 free(buf);
1328
1329 return ret;
1330}
1331
1332static int git_config_from_blob_ref(config_fn_t fn,
1333 const char *name,
1334 void *data)
1335{
1336 unsigned char sha1[20];
1337
1338 if (get_sha1(name, sha1) < 0)
1339 return error("unable to resolve config blob '%s'", name);
1340 return git_config_from_blob_sha1(fn, name, sha1, data);
1341}
1342
1343const char *git_etc_gitconfig(void)
1344{
1345 static const char *system_wide;
1346 if (!system_wide)
1347 system_wide = system_path(ETC_GITCONFIG);
1348 return system_wide;
1349}
1350
1351/*
1352 * Parse environment variable 'k' as a boolean (in various
1353 * possible spellings); if missing, use the default value 'def'.
1354 */
1355int git_env_bool(const char *k, int def)
1356{
1357 const char *v = getenv(k);
1358 return v ? git_config_bool(k, v) : def;
1359}
1360
1361/*
1362 * Parse environment variable 'k' as ulong with possibly a unit
1363 * suffix; if missing, use the default value 'val'.
1364 */
1365unsigned long git_env_ulong(const char *k, unsigned long val)
1366{
1367 const char *v = getenv(k);
1368 if (v && !git_parse_ulong(v, &val))
1369 die("failed to parse %s", k);
1370 return val;
1371}
1372
1373int git_config_system(void)
1374{
1375 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1376}
1377
1378static int do_git_config_sequence(config_fn_t fn, void *data)
1379{
1380 int ret = 0;
1381 char *xdg_config = xdg_config_home("config");
1382 char *user_config = expand_user_path("~/.gitconfig");
1383 char *repo_config = git_pathdup("config");
1384
1385 current_parsing_scope = CONFIG_SCOPE_SYSTEM;
1386 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0))
1387 ret += git_config_from_file(fn, git_etc_gitconfig(),
1388 data);
1389
1390 current_parsing_scope = CONFIG_SCOPE_GLOBAL;
1391 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK))
1392 ret += git_config_from_file(fn, xdg_config, data);
1393
1394 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK))
1395 ret += git_config_from_file(fn, user_config, data);
1396
1397 current_parsing_scope = CONFIG_SCOPE_REPO;
1398 if (repo_config && !access_or_die(repo_config, R_OK, 0))
1399 ret += git_config_from_file(fn, repo_config, data);
1400
1401 current_parsing_scope = CONFIG_SCOPE_CMDLINE;
1402 if (git_config_from_parameters(fn, data) < 0)
1403 die(_("unable to parse command-line config"));
1404
1405 current_parsing_scope = CONFIG_SCOPE_UNKNOWN;
1406 free(xdg_config);
1407 free(user_config);
1408 free(repo_config);
1409 return ret;
1410}
1411
1412int git_config_with_options(config_fn_t fn, void *data,
1413 struct git_config_source *config_source,
1414 int respect_includes)
1415{
1416 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1417
1418 if (respect_includes) {
1419 inc.fn = fn;
1420 inc.data = data;
1421 fn = git_config_include;
1422 data = &inc;
1423 }
1424
1425 /*
1426 * If we have a specific filename, use it. Otherwise, follow the
1427 * regular lookup sequence.
1428 */
1429 if (config_source && config_source->use_stdin)
1430 return git_config_from_stdin(fn, data);
1431 else if (config_source && config_source->file)
1432 return git_config_from_file(fn, config_source->file, data);
1433 else if (config_source && config_source->blob)
1434 return git_config_from_blob_ref(fn, config_source->blob, data);
1435
1436 return do_git_config_sequence(fn, data);
1437}
1438
1439static void git_config_raw(config_fn_t fn, void *data)
1440{
1441 if (git_config_with_options(fn, data, NULL, 1) < 0)
1442 /*
1443 * git_config_with_options() normally returns only
1444 * zero, as most errors are fatal, and
1445 * non-fatal potential errors are guarded by "if"
1446 * statements that are entered only when no error is
1447 * possible.
1448 *
1449 * If we ever encounter a non-fatal error, it means
1450 * something went really wrong and we should stop
1451 * immediately.
1452 */
1453 die(_("unknown error occurred while reading the configuration files"));
1454}
1455
1456static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
1457{
1458 int i, value_index;
1459 struct string_list *values;
1460 struct config_set_element *entry;
1461 struct configset_list *list = &cs->list;
1462
1463 for (i = 0; i < list->nr; i++) {
1464 entry = list->items[i].e;
1465 value_index = list->items[i].value_index;
1466 values = &entry->value_list;
1467
1468 current_config_kvi = values->items[value_index].util;
1469
1470 if (fn(entry->key, values->items[value_index].string, data) < 0)
1471 git_die_config_linenr(entry->key,
1472 current_config_kvi->filename,
1473 current_config_kvi->linenr);
1474
1475 current_config_kvi = NULL;
1476 }
1477}
1478
1479static void git_config_check_init(void);
1480
1481void git_config(config_fn_t fn, void *data)
1482{
1483 git_config_check_init();
1484 configset_iter(&the_config_set, fn, data);
1485}
1486
1487static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1488{
1489 struct config_set_element k;
1490 struct config_set_element *found_entry;
1491 char *normalized_key;
1492 /*
1493 * `key` may come from the user, so normalize it before using it
1494 * for querying entries from the hashmap.
1495 */
1496 if (git_config_parse_key(key, &normalized_key, NULL))
1497 return NULL;
1498
1499 hashmap_entry_init(&k, strhash(normalized_key));
1500 k.key = normalized_key;
1501 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1502 free(normalized_key);
1503 return found_entry;
1504}
1505
1506static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1507{
1508 struct config_set_element *e;
1509 struct string_list_item *si;
1510 struct configset_list_item *l_item;
1511 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1512
1513 e = configset_find_element(cs, key);
1514 /*
1515 * Since the keys are being fed by git_config*() callback mechanism, they
1516 * are already normalized. So simply add them without any further munging.
1517 */
1518 if (!e) {
1519 e = xmalloc(sizeof(*e));
1520 hashmap_entry_init(e, strhash(key));
1521 e->key = xstrdup(key);
1522 string_list_init(&e->value_list, 1);
1523 hashmap_add(&cs->config_hash, e);
1524 }
1525 si = string_list_append_nodup(&e->value_list, xstrdup_or_null(value));
1526
1527 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1528 l_item = &cs->list.items[cs->list.nr++];
1529 l_item->e = e;
1530 l_item->value_index = e->value_list.nr - 1;
1531
1532 if (!cf)
1533 die("BUG: configset_add_value has no source");
1534 if (cf->name) {
1535 kv_info->filename = strintern(cf->name);
1536 kv_info->linenr = cf->linenr;
1537 kv_info->origin_type = cf->origin_type;
1538 } else {
1539 /* for values read from `git_config_from_parameters()` */
1540 kv_info->filename = NULL;
1541 kv_info->linenr = -1;
1542 kv_info->origin_type = CONFIG_ORIGIN_CMDLINE;
1543 }
1544 kv_info->scope = current_parsing_scope;
1545 si->util = kv_info;
1546
1547 return 0;
1548}
1549
1550static int config_set_element_cmp(const struct config_set_element *e1,
1551 const struct config_set_element *e2, const void *unused)
1552{
1553 return strcmp(e1->key, e2->key);
1554}
1555
1556void git_configset_init(struct config_set *cs)
1557{
1558 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1559 cs->hash_initialized = 1;
1560 cs->list.nr = 0;
1561 cs->list.alloc = 0;
1562 cs->list.items = NULL;
1563}
1564
1565void git_configset_clear(struct config_set *cs)
1566{
1567 struct config_set_element *entry;
1568 struct hashmap_iter iter;
1569 if (!cs->hash_initialized)
1570 return;
1571
1572 hashmap_iter_init(&cs->config_hash, &iter);
1573 while ((entry = hashmap_iter_next(&iter))) {
1574 free(entry->key);
1575 string_list_clear(&entry->value_list, 1);
1576 }
1577 hashmap_free(&cs->config_hash, 1);
1578 cs->hash_initialized = 0;
1579 free(cs->list.items);
1580 cs->list.nr = 0;
1581 cs->list.alloc = 0;
1582 cs->list.items = NULL;
1583}
1584
1585static int config_set_callback(const char *key, const char *value, void *cb)
1586{
1587 struct config_set *cs = cb;
1588 configset_add_value(cs, key, value);
1589 return 0;
1590}
1591
1592int git_configset_add_file(struct config_set *cs, const char *filename)
1593{
1594 return git_config_from_file(config_set_callback, filename, cs);
1595}
1596
1597int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1598{
1599 const struct string_list *values = NULL;
1600 /*
1601 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1602 * queried key in the files of the configset, the value returned will be the last
1603 * value in the value list for that key.
1604 */
1605 values = git_configset_get_value_multi(cs, key);
1606
1607 if (!values)
1608 return 1;
1609 assert(values->nr > 0);
1610 *value = values->items[values->nr - 1].string;
1611 return 0;
1612}
1613
1614const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1615{
1616 struct config_set_element *e = configset_find_element(cs, key);
1617 return e ? &e->value_list : NULL;
1618}
1619
1620int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1621{
1622 const char *value;
1623 if (!git_configset_get_value(cs, key, &value))
1624 return git_config_string(dest, key, value);
1625 else
1626 return 1;
1627}
1628
1629int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1630{
1631 return git_configset_get_string_const(cs, key, (const char **)dest);
1632}
1633
1634int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1635{
1636 const char *value;
1637 if (!git_configset_get_value(cs, key, &value)) {
1638 *dest = git_config_int(key, value);
1639 return 0;
1640 } else
1641 return 1;
1642}
1643
1644int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1645{
1646 const char *value;
1647 if (!git_configset_get_value(cs, key, &value)) {
1648 *dest = git_config_ulong(key, value);
1649 return 0;
1650 } else
1651 return 1;
1652}
1653
1654int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1655{
1656 const char *value;
1657 if (!git_configset_get_value(cs, key, &value)) {
1658 *dest = git_config_bool(key, value);
1659 return 0;
1660 } else
1661 return 1;
1662}
1663
1664int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1665 int *is_bool, int *dest)
1666{
1667 const char *value;
1668 if (!git_configset_get_value(cs, key, &value)) {
1669 *dest = git_config_bool_or_int(key, value, is_bool);
1670 return 0;
1671 } else
1672 return 1;
1673}
1674
1675int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1676{
1677 const char *value;
1678 if (!git_configset_get_value(cs, key, &value)) {
1679 *dest = git_config_maybe_bool(key, value);
1680 if (*dest == -1)
1681 return -1;
1682 return 0;
1683 } else
1684 return 1;
1685}
1686
1687int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1688{
1689 const char *value;
1690 if (!git_configset_get_value(cs, key, &value))
1691 return git_config_pathname(dest, key, value);
1692 else
1693 return 1;
1694}
1695
1696static void git_config_check_init(void)
1697{
1698 if (the_config_set.hash_initialized)
1699 return;
1700 git_configset_init(&the_config_set);
1701 git_config_raw(config_set_callback, &the_config_set);
1702}
1703
1704void git_config_clear(void)
1705{
1706 if (!the_config_set.hash_initialized)
1707 return;
1708 git_configset_clear(&the_config_set);
1709}
1710
1711int git_config_get_value(const char *key, const char **value)
1712{
1713 git_config_check_init();
1714 return git_configset_get_value(&the_config_set, key, value);
1715}
1716
1717const struct string_list *git_config_get_value_multi(const char *key)
1718{
1719 git_config_check_init();
1720 return git_configset_get_value_multi(&the_config_set, key);
1721}
1722
1723int git_config_get_string_const(const char *key, const char **dest)
1724{
1725 int ret;
1726 git_config_check_init();
1727 ret = git_configset_get_string_const(&the_config_set, key, dest);
1728 if (ret < 0)
1729 git_die_config(key, NULL);
1730 return ret;
1731}
1732
1733int git_config_get_string(const char *key, char **dest)
1734{
1735 git_config_check_init();
1736 return git_config_get_string_const(key, (const char **)dest);
1737}
1738
1739int git_config_get_int(const char *key, int *dest)
1740{
1741 git_config_check_init();
1742 return git_configset_get_int(&the_config_set, key, dest);
1743}
1744
1745int git_config_get_ulong(const char *key, unsigned long *dest)
1746{
1747 git_config_check_init();
1748 return git_configset_get_ulong(&the_config_set, key, dest);
1749}
1750
1751int git_config_get_bool(const char *key, int *dest)
1752{
1753 git_config_check_init();
1754 return git_configset_get_bool(&the_config_set, key, dest);
1755}
1756
1757int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1758{
1759 git_config_check_init();
1760 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1761}
1762
1763int git_config_get_maybe_bool(const char *key, int *dest)
1764{
1765 git_config_check_init();
1766 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1767}
1768
1769int git_config_get_pathname(const char *key, const char **dest)
1770{
1771 int ret;
1772 git_config_check_init();
1773 ret = git_configset_get_pathname(&the_config_set, key, dest);
1774 if (ret < 0)
1775 git_die_config(key, NULL);
1776 return ret;
1777}
1778
1779int git_config_get_untracked_cache(void)
1780{
1781 int val = -1;
1782 const char *v;
1783
1784 /* Hack for test programs like test-dump-untracked-cache */
1785 if (ignore_untracked_cache_config)
1786 return -1;
1787
1788 if (!git_config_get_maybe_bool("core.untrackedcache", &val))
1789 return val;
1790
1791 if (!git_config_get_value("core.untrackedcache", &v)) {
1792 if (!strcasecmp(v, "keep"))
1793 return -1;
1794
1795 error("unknown core.untrackedCache value '%s'; "
1796 "using 'keep' default value", v);
1797 return -1;
1798 }
1799
1800 return -1; /* default value */
1801}
1802
1803NORETURN
1804void git_die_config_linenr(const char *key, const char *filename, int linenr)
1805{
1806 if (!filename)
1807 die(_("unable to parse '%s' from command-line config"), key);
1808 else
1809 die(_("bad config variable '%s' in file '%s' at line %d"),
1810 key, filename, linenr);
1811}
1812
1813NORETURN __attribute__((format(printf, 2, 3)))
1814void git_die_config(const char *key, const char *err, ...)
1815{
1816 const struct string_list *values;
1817 struct key_value_info *kv_info;
1818
1819 if (err) {
1820 va_list params;
1821 va_start(params, err);
1822 vreportf("error: ", err, params);
1823 va_end(params);
1824 }
1825 values = git_config_get_value_multi(key);
1826 kv_info = values->items[values->nr - 1].util;
1827 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
1828}
1829
1830/*
1831 * Find all the stuff for git_config_set() below.
1832 */
1833
1834static struct {
1835 int baselen;
1836 char *key;
1837 int do_not_match;
1838 regex_t *value_regex;
1839 int multi_replace;
1840 size_t *offset;
1841 unsigned int offset_alloc;
1842 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1843 int seen;
1844} store;
1845
1846static int matches(const char *key, const char *value)
1847{
1848 if (strcmp(key, store.key))
1849 return 0; /* not ours */
1850 if (!store.value_regex)
1851 return 1; /* always matches */
1852 if (store.value_regex == CONFIG_REGEX_NONE)
1853 return 0; /* never matches */
1854
1855 return store.do_not_match ^
1856 (value && !regexec(store.value_regex, value, 0, NULL, 0));
1857}
1858
1859static int store_aux(const char *key, const char *value, void *cb)
1860{
1861 const char *ep;
1862 size_t section_len;
1863
1864 switch (store.state) {
1865 case KEY_SEEN:
1866 if (matches(key, value)) {
1867 if (store.seen == 1 && store.multi_replace == 0) {
1868 warning(_("%s has multiple values"), key);
1869 }
1870
1871 ALLOC_GROW(store.offset, store.seen + 1,
1872 store.offset_alloc);
1873
1874 store.offset[store.seen] = cf->do_ftell(cf);
1875 store.seen++;
1876 }
1877 break;
1878 case SECTION_SEEN:
1879 /*
1880 * What we are looking for is in store.key (both
1881 * section and var), and its section part is baselen
1882 * long. We found key (again, both section and var).
1883 * We would want to know if this key is in the same
1884 * section as what we are looking for. We already
1885 * know we are in the same section as what should
1886 * hold store.key.
1887 */
1888 ep = strrchr(key, '.');
1889 section_len = ep - key;
1890
1891 if ((section_len != store.baselen) ||
1892 memcmp(key, store.key, section_len+1)) {
1893 store.state = SECTION_END_SEEN;
1894 break;
1895 }
1896
1897 /*
1898 * Do not increment matches: this is no match, but we
1899 * just made sure we are in the desired section.
1900 */
1901 ALLOC_GROW(store.offset, store.seen + 1,
1902 store.offset_alloc);
1903 store.offset[store.seen] = cf->do_ftell(cf);
1904 /* fallthru */
1905 case SECTION_END_SEEN:
1906 case START:
1907 if (matches(key, value)) {
1908 ALLOC_GROW(store.offset, store.seen + 1,
1909 store.offset_alloc);
1910 store.offset[store.seen] = cf->do_ftell(cf);
1911 store.state = KEY_SEEN;
1912 store.seen++;
1913 } else {
1914 if (strrchr(key, '.') - key == store.baselen &&
1915 !strncmp(key, store.key, store.baselen)) {
1916 store.state = SECTION_SEEN;
1917 ALLOC_GROW(store.offset,
1918 store.seen + 1,
1919 store.offset_alloc);
1920 store.offset[store.seen] = cf->do_ftell(cf);
1921 }
1922 }
1923 }
1924 return 0;
1925}
1926
1927static int write_error(const char *filename)
1928{
1929 error("failed to write new configuration file %s", filename);
1930
1931 /* Same error code as "failed to rename". */
1932 return 4;
1933}
1934
1935static int store_write_section(int fd, const char *key)
1936{
1937 const char *dot;
1938 int i, success;
1939 struct strbuf sb = STRBUF_INIT;
1940
1941 dot = memchr(key, '.', store.baselen);
1942 if (dot) {
1943 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1944 for (i = dot - key + 1; i < store.baselen; i++) {
1945 if (key[i] == '"' || key[i] == '\\')
1946 strbuf_addch(&sb, '\\');
1947 strbuf_addch(&sb, key[i]);
1948 }
1949 strbuf_addstr(&sb, "\"]\n");
1950 } else {
1951 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1952 }
1953
1954 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1955 strbuf_release(&sb);
1956
1957 return success;
1958}
1959
1960static int store_write_pair(int fd, const char *key, const char *value)
1961{
1962 int i, success;
1963 int length = strlen(key + store.baselen + 1);
1964 const char *quote = "";
1965 struct strbuf sb = STRBUF_INIT;
1966
1967 /*
1968 * Check to see if the value needs to be surrounded with a dq pair.
1969 * Note that problematic characters are always backslash-quoted; this
1970 * check is about not losing leading or trailing SP and strings that
1971 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1972 * configuration parser.
1973 */
1974 if (value[0] == ' ')
1975 quote = "\"";
1976 for (i = 0; value[i]; i++)
1977 if (value[i] == ';' || value[i] == '#')
1978 quote = "\"";
1979 if (i && value[i - 1] == ' ')
1980 quote = "\"";
1981
1982 strbuf_addf(&sb, "\t%.*s = %s",
1983 length, key + store.baselen + 1, quote);
1984
1985 for (i = 0; value[i]; i++)
1986 switch (value[i]) {
1987 case '\n':
1988 strbuf_addstr(&sb, "\\n");
1989 break;
1990 case '\t':
1991 strbuf_addstr(&sb, "\\t");
1992 break;
1993 case '"':
1994 case '\\':
1995 strbuf_addch(&sb, '\\');
1996 default:
1997 strbuf_addch(&sb, value[i]);
1998 break;
1999 }
2000 strbuf_addf(&sb, "%s\n", quote);
2001
2002 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
2003 strbuf_release(&sb);
2004
2005 return success;
2006}
2007
2008static ssize_t find_beginning_of_line(const char *contents, size_t size,
2009 size_t offset_, int *found_bracket)
2010{
2011 size_t equal_offset = size, bracket_offset = size;
2012 ssize_t offset;
2013
2014contline:
2015 for (offset = offset_-2; offset > 0
2016 && contents[offset] != '\n'; offset--)
2017 switch (contents[offset]) {
2018 case '=': equal_offset = offset; break;
2019 case ']': bracket_offset = offset; break;
2020 }
2021 if (offset > 0 && contents[offset-1] == '\\') {
2022 offset_ = offset;
2023 goto contline;
2024 }
2025 if (bracket_offset < equal_offset) {
2026 *found_bracket = 1;
2027 offset = bracket_offset+1;
2028 } else
2029 offset++;
2030
2031 return offset;
2032}
2033
2034int git_config_set_in_file_gently(const char *config_filename,
2035 const char *key, const char *value)
2036{
2037 return git_config_set_multivar_in_file_gently(config_filename, key, value, NULL, 0);
2038}
2039
2040void git_config_set_in_file(const char *config_filename,
2041 const char *key, const char *value)
2042{
2043 git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
2044}
2045
2046int git_config_set_gently(const char *key, const char *value)
2047{
2048 return git_config_set_multivar_gently(key, value, NULL, 0);
2049}
2050
2051void git_config_set(const char *key, const char *value)
2052{
2053 git_config_set_multivar(key, value, NULL, 0);
2054}
2055
2056/*
2057 * If value==NULL, unset in (remove from) config,
2058 * if value_regex!=NULL, disregard key/value pairs where value does not match.
2059 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
2060 * (only add a new one)
2061 * if multi_replace==0, nothing, or only one matching key/value is replaced,
2062 * else all matching key/values (regardless how many) are removed,
2063 * before the new pair is written.
2064 *
2065 * Returns 0 on success.
2066 *
2067 * This function does this:
2068 *
2069 * - it locks the config file by creating ".git/config.lock"
2070 *
2071 * - it then parses the config using store_aux() as validator to find
2072 * the position on the key/value pair to replace. If it is to be unset,
2073 * it must be found exactly once.
2074 *
2075 * - the config file is mmap()ed and the part before the match (if any) is
2076 * written to the lock file, then the changed part and the rest.
2077 *
2078 * - the config file is removed and the lock file rename()d to it.
2079 *
2080 */
2081int git_config_set_multivar_in_file_gently(const char *config_filename,
2082 const char *key, const char *value,
2083 const char *value_regex,
2084 int multi_replace)
2085{
2086 int fd = -1, in_fd = -1;
2087 int ret;
2088 struct lock_file *lock = NULL;
2089 char *filename_buf = NULL;
2090 char *contents = NULL;
2091 size_t contents_sz;
2092
2093 /* parse-key returns negative; flip the sign to feed exit(3) */
2094 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
2095 if (ret)
2096 goto out_free;
2097
2098 store.multi_replace = multi_replace;
2099
2100 if (!config_filename)
2101 config_filename = filename_buf = git_pathdup("config");
2102
2103 /*
2104 * The lock serves a purpose in addition to locking: the new
2105 * contents of .git/config will be written into it.
2106 */
2107 lock = xcalloc(1, sizeof(struct lock_file));
2108 fd = hold_lock_file_for_update(lock, config_filename, 0);
2109 if (fd < 0) {
2110 error_errno("could not lock config file %s", config_filename);
2111 free(store.key);
2112 ret = CONFIG_NO_LOCK;
2113 goto out_free;
2114 }
2115
2116 /*
2117 * If .git/config does not exist yet, write a minimal version.
2118 */
2119 in_fd = open(config_filename, O_RDONLY);
2120 if ( in_fd < 0 ) {
2121 free(store.key);
2122
2123 if ( ENOENT != errno ) {
2124 error_errno("opening %s", config_filename);
2125 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
2126 goto out_free;
2127 }
2128 /* if nothing to unset, error out */
2129 if (value == NULL) {
2130 ret = CONFIG_NOTHING_SET;
2131 goto out_free;
2132 }
2133
2134 store.key = (char *)key;
2135 if (!store_write_section(fd, key) ||
2136 !store_write_pair(fd, key, value))
2137 goto write_err_out;
2138 } else {
2139 struct stat st;
2140 size_t copy_begin, copy_end;
2141 int i, new_line = 0;
2142
2143 if (value_regex == NULL)
2144 store.value_regex = NULL;
2145 else if (value_regex == CONFIG_REGEX_NONE)
2146 store.value_regex = CONFIG_REGEX_NONE;
2147 else {
2148 if (value_regex[0] == '!') {
2149 store.do_not_match = 1;
2150 value_regex++;
2151 } else
2152 store.do_not_match = 0;
2153
2154 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
2155 if (regcomp(store.value_regex, value_regex,
2156 REG_EXTENDED)) {
2157 error("invalid pattern: %s", value_regex);
2158 free(store.value_regex);
2159 ret = CONFIG_INVALID_PATTERN;
2160 goto out_free;
2161 }
2162 }
2163
2164 ALLOC_GROW(store.offset, 1, store.offset_alloc);
2165 store.offset[0] = 0;
2166 store.state = START;
2167 store.seen = 0;
2168
2169 /*
2170 * After this, store.offset will contain the *end* offset
2171 * of the last match, or remain at 0 if no match was found.
2172 * As a side effect, we make sure to transform only a valid
2173 * existing config file.
2174 */
2175 if (git_config_from_file(store_aux, config_filename, NULL)) {
2176 error("invalid config file %s", config_filename);
2177 free(store.key);
2178 if (store.value_regex != NULL &&
2179 store.value_regex != CONFIG_REGEX_NONE) {
2180 regfree(store.value_regex);
2181 free(store.value_regex);
2182 }
2183 ret = CONFIG_INVALID_FILE;
2184 goto out_free;
2185 }
2186
2187 free(store.key);
2188 if (store.value_regex != NULL &&
2189 store.value_regex != CONFIG_REGEX_NONE) {
2190 regfree(store.value_regex);
2191 free(store.value_regex);
2192 }
2193
2194 /* if nothing to unset, or too many matches, error out */
2195 if ((store.seen == 0 && value == NULL) ||
2196 (store.seen > 1 && multi_replace == 0)) {
2197 ret = CONFIG_NOTHING_SET;
2198 goto out_free;
2199 }
2200
2201 fstat(in_fd, &st);
2202 contents_sz = xsize_t(st.st_size);
2203 contents = xmmap_gently(NULL, contents_sz, PROT_READ,
2204 MAP_PRIVATE, in_fd, 0);
2205 if (contents == MAP_FAILED) {
2206 if (errno == ENODEV && S_ISDIR(st.st_mode))
2207 errno = EISDIR;
2208 error_errno("unable to mmap '%s'", config_filename);
2209 ret = CONFIG_INVALID_FILE;
2210 contents = NULL;
2211 goto out_free;
2212 }
2213 close(in_fd);
2214 in_fd = -1;
2215
2216 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2217 error_errno("chmod on %s failed", get_lock_file_path(lock));
2218 ret = CONFIG_NO_WRITE;
2219 goto out_free;
2220 }
2221
2222 if (store.seen == 0)
2223 store.seen = 1;
2224
2225 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2226 if (store.offset[i] == 0) {
2227 store.offset[i] = copy_end = contents_sz;
2228 } else if (store.state != KEY_SEEN) {
2229 copy_end = store.offset[i];
2230 } else
2231 copy_end = find_beginning_of_line(
2232 contents, contents_sz,
2233 store.offset[i]-2, &new_line);
2234
2235 if (copy_end > 0 && contents[copy_end-1] != '\n')
2236 new_line = 1;
2237
2238 /* write the first part of the config */
2239 if (copy_end > copy_begin) {
2240 if (write_in_full(fd, contents + copy_begin,
2241 copy_end - copy_begin) <
2242 copy_end - copy_begin)
2243 goto write_err_out;
2244 if (new_line &&
2245 write_str_in_full(fd, "\n") != 1)
2246 goto write_err_out;
2247 }
2248 copy_begin = store.offset[i];
2249 }
2250
2251 /* write the pair (value == NULL means unset) */
2252 if (value != NULL) {
2253 if (store.state == START) {
2254 if (!store_write_section(fd, key))
2255 goto write_err_out;
2256 }
2257 if (!store_write_pair(fd, key, value))
2258 goto write_err_out;
2259 }
2260
2261 /* write the rest of the config */
2262 if (copy_begin < contents_sz)
2263 if (write_in_full(fd, contents + copy_begin,
2264 contents_sz - copy_begin) <
2265 contents_sz - copy_begin)
2266 goto write_err_out;
2267
2268 munmap(contents, contents_sz);
2269 contents = NULL;
2270 }
2271
2272 if (commit_lock_file(lock) < 0) {
2273 error_errno("could not write config file %s", config_filename);
2274 ret = CONFIG_NO_WRITE;
2275 lock = NULL;
2276 goto out_free;
2277 }
2278
2279 /*
2280 * lock is committed, so don't try to roll it back below.
2281 * NOTE: Since lockfile.c keeps a linked list of all created
2282 * lock_file structures, it isn't safe to free(lock). It's
2283 * better to just leave it hanging around.
2284 */
2285 lock = NULL;
2286 ret = 0;
2287
2288 /* Invalidate the config cache */
2289 git_config_clear();
2290
2291out_free:
2292 if (lock)
2293 rollback_lock_file(lock);
2294 free(filename_buf);
2295 if (contents)
2296 munmap(contents, contents_sz);
2297 if (in_fd >= 0)
2298 close(in_fd);
2299 return ret;
2300
2301write_err_out:
2302 ret = write_error(get_lock_file_path(lock));
2303 goto out_free;
2304
2305}
2306
2307void git_config_set_multivar_in_file(const char *config_filename,
2308 const char *key, const char *value,
2309 const char *value_regex, int multi_replace)
2310{
2311 if (!git_config_set_multivar_in_file_gently(config_filename, key, value,
2312 value_regex, multi_replace))
2313 return;
2314 if (value)
2315 die(_("could not set '%s' to '%s'"), key, value);
2316 else
2317 die(_("could not unset '%s'"), key);
2318}
2319
2320int git_config_set_multivar_gently(const char *key, const char *value,
2321 const char *value_regex, int multi_replace)
2322{
2323 return git_config_set_multivar_in_file_gently(NULL, key, value, value_regex,
2324 multi_replace);
2325}
2326
2327void git_config_set_multivar(const char *key, const char *value,
2328 const char *value_regex, int multi_replace)
2329{
2330 git_config_set_multivar_in_file(NULL, key, value, value_regex,
2331 multi_replace);
2332}
2333
2334static int section_name_match (const char *buf, const char *name)
2335{
2336 int i = 0, j = 0, dot = 0;
2337 if (buf[i] != '[')
2338 return 0;
2339 for (i = 1; buf[i] && buf[i] != ']'; i++) {
2340 if (!dot && isspace(buf[i])) {
2341 dot = 1;
2342 if (name[j++] != '.')
2343 break;
2344 for (i++; isspace(buf[i]); i++)
2345 ; /* do nothing */
2346 if (buf[i] != '"')
2347 break;
2348 continue;
2349 }
2350 if (buf[i] == '\\' && dot)
2351 i++;
2352 else if (buf[i] == '"' && dot) {
2353 for (i++; isspace(buf[i]); i++)
2354 ; /* do_nothing */
2355 break;
2356 }
2357 if (buf[i] != name[j++])
2358 break;
2359 }
2360 if (buf[i] == ']' && name[j] == 0) {
2361 /*
2362 * We match, now just find the right length offset by
2363 * gobbling up any whitespace after it, as well
2364 */
2365 i++;
2366 for (; buf[i] && isspace(buf[i]); i++)
2367 ; /* do nothing */
2368 return i;
2369 }
2370 return 0;
2371}
2372
2373static int section_name_is_ok(const char *name)
2374{
2375 /* Empty section names are bogus. */
2376 if (!*name)
2377 return 0;
2378
2379 /*
2380 * Before a dot, we must be alphanumeric or dash. After the first dot,
2381 * anything goes, so we can stop checking.
2382 */
2383 for (; *name && *name != '.'; name++)
2384 if (*name != '-' && !isalnum(*name))
2385 return 0;
2386 return 1;
2387}
2388
2389/* if new_name == NULL, the section is removed instead */
2390int git_config_rename_section_in_file(const char *config_filename,
2391 const char *old_name, const char *new_name)
2392{
2393 int ret = 0, remove = 0;
2394 char *filename_buf = NULL;
2395 struct lock_file *lock;
2396 int out_fd;
2397 char buf[1024];
2398 FILE *config_file;
2399 struct stat st;
2400
2401 if (new_name && !section_name_is_ok(new_name)) {
2402 ret = error("invalid section name: %s", new_name);
2403 goto out;
2404 }
2405
2406 if (!config_filename)
2407 config_filename = filename_buf = git_pathdup("config");
2408
2409 lock = xcalloc(1, sizeof(struct lock_file));
2410 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
2411 if (out_fd < 0) {
2412 ret = error("could not lock config file %s", config_filename);
2413 goto out;
2414 }
2415
2416 if (!(config_file = fopen(config_filename, "rb"))) {
2417 /* no config file means nothing to rename, no error */
2418 goto unlock_and_out;
2419 }
2420
2421 fstat(fileno(config_file), &st);
2422
2423 if (chmod(get_lock_file_path(lock), st.st_mode & 07777) < 0) {
2424 ret = error_errno("chmod on %s failed",
2425 get_lock_file_path(lock));
2426 goto out;
2427 }
2428
2429 while (fgets(buf, sizeof(buf), config_file)) {
2430 int i;
2431 int length;
2432 char *output = buf;
2433 for (i = 0; buf[i] && isspace(buf[i]); i++)
2434 ; /* do nothing */
2435 if (buf[i] == '[') {
2436 /* it's a section */
2437 int offset = section_name_match(&buf[i], old_name);
2438 if (offset > 0) {
2439 ret++;
2440 if (new_name == NULL) {
2441 remove = 1;
2442 continue;
2443 }
2444 store.baselen = strlen(new_name);
2445 if (!store_write_section(out_fd, new_name)) {
2446 ret = write_error(get_lock_file_path(lock));
2447 goto out;
2448 }
2449 /*
2450 * We wrote out the new section, with
2451 * a newline, now skip the old
2452 * section's length
2453 */
2454 output += offset + i;
2455 if (strlen(output) > 0) {
2456 /*
2457 * More content means there's
2458 * a declaration to put on the
2459 * next line; indent with a
2460 * tab
2461 */
2462 output -= 1;
2463 output[0] = '\t';
2464 }
2465 }
2466 remove = 0;
2467 }
2468 if (remove)
2469 continue;
2470 length = strlen(output);
2471 if (write_in_full(out_fd, output, length) != length) {
2472 ret = write_error(get_lock_file_path(lock));
2473 goto out;
2474 }
2475 }
2476 fclose(config_file);
2477unlock_and_out:
2478 if (commit_lock_file(lock) < 0)
2479 ret = error_errno("could not write config file %s",
2480 config_filename);
2481out:
2482 free(filename_buf);
2483 return ret;
2484}
2485
2486int git_config_rename_section(const char *old_name, const char *new_name)
2487{
2488 return git_config_rename_section_in_file(NULL, old_name, new_name);
2489}
2490
2491/*
2492 * Call this to report error for your variable that should not
2493 * get a boolean value (i.e. "[my] var" means "true").
2494 */
2495#undef config_error_nonbool
2496int config_error_nonbool(const char *var)
2497{
2498 return error("missing value for '%s'", var);
2499}
2500
2501int parse_config_key(const char *var,
2502 const char *section,
2503 const char **subsection, int *subsection_len,
2504 const char **key)
2505{
2506 int section_len = strlen(section);
2507 const char *dot;
2508
2509 /* Does it start with "section." ? */
2510 if (!starts_with(var, section) || var[section_len] != '.')
2511 return -1;
2512
2513 /*
2514 * Find the key; we don't know yet if we have a subsection, but we must
2515 * parse backwards from the end, since the subsection may have dots in
2516 * it, too.
2517 */
2518 dot = strrchr(var, '.');
2519 *key = dot + 1;
2520
2521 /* Did we have a subsection at all? */
2522 if (dot == var + section_len) {
2523 *subsection = NULL;
2524 *subsection_len = 0;
2525 }
2526 else {
2527 *subsection = var + section_len + 1;
2528 *subsection_len = dot - *subsection;
2529 }
2530
2531 return 0;
2532}
2533
2534const char *current_config_origin_type(void)
2535{
2536 int type;
2537 if (current_config_kvi)
2538 type = current_config_kvi->origin_type;
2539 else if(cf)
2540 type = cf->origin_type;
2541 else
2542 die("BUG: current_config_origin_type called outside config callback");
2543
2544 switch (type) {
2545 case CONFIG_ORIGIN_BLOB:
2546 return "blob";
2547 case CONFIG_ORIGIN_FILE:
2548 return "file";
2549 case CONFIG_ORIGIN_STDIN:
2550 return "standard input";
2551 case CONFIG_ORIGIN_SUBMODULE_BLOB:
2552 return "submodule-blob";
2553 case CONFIG_ORIGIN_CMDLINE:
2554 return "command line";
2555 default:
2556 die("BUG: unknown config origin type");
2557 }
2558}
2559
2560const char *current_config_name(void)
2561{
2562 const char *name;
2563 if (current_config_kvi)
2564 name = current_config_kvi->filename;
2565 else if (cf)
2566 name = cf->name;
2567 else
2568 die("BUG: current_config_name called outside config callback");
2569 return name ? name : "";
2570}
2571
2572enum config_scope current_config_scope(void)
2573{
2574 if (current_config_kvi)
2575 return current_config_kvi->scope;
2576 else
2577 return current_parsing_scope;
2578}