Merge branch 'ow/config-mailmap-pathname'
[git/git.git] / config.c
1 /*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
7 */
8 #include "cache.h"
9 #include "exec_cmd.h"
10 #include "strbuf.h"
11 #include "quote.h"
12
13 struct config_source {
14 struct config_source *prev;
15 union {
16 FILE *file;
17 struct config_buf {
18 const char *buf;
19 size_t len;
20 size_t pos;
21 } buf;
22 } u;
23 const char *name;
24 const char *path;
25 int die_on_error;
26 int linenr;
27 int eof;
28 struct strbuf value;
29 struct strbuf var;
30
31 int (*do_fgetc)(struct config_source *c);
32 int (*do_ungetc)(int c, struct config_source *conf);
33 long (*do_ftell)(struct config_source *c);
34 };
35
36 static struct config_source *cf;
37
38 static int zlib_compression_seen;
39
40 static int config_file_fgetc(struct config_source *conf)
41 {
42 return fgetc(conf->u.file);
43 }
44
45 static int config_file_ungetc(int c, struct config_source *conf)
46 {
47 return ungetc(c, conf->u.file);
48 }
49
50 static long config_file_ftell(struct config_source *conf)
51 {
52 return ftell(conf->u.file);
53 }
54
55
56 static int config_buf_fgetc(struct config_source *conf)
57 {
58 if (conf->u.buf.pos < conf->u.buf.len)
59 return conf->u.buf.buf[conf->u.buf.pos++];
60
61 return EOF;
62 }
63
64 static int config_buf_ungetc(int c, struct config_source *conf)
65 {
66 if (conf->u.buf.pos > 0)
67 return conf->u.buf.buf[--conf->u.buf.pos];
68
69 return EOF;
70 }
71
72 static long config_buf_ftell(struct config_source *conf)
73 {
74 return conf->u.buf.pos;
75 }
76
77 #define MAX_INCLUDE_DEPTH 10
78 static const char include_depth_advice[] =
79 "exceeded maximum include depth (%d) while including\n"
80 " %s\n"
81 "from\n"
82 " %s\n"
83 "Do you have circular includes?";
84 static int handle_path_include(const char *path, struct config_include_data *inc)
85 {
86 int ret = 0;
87 struct strbuf buf = STRBUF_INIT;
88 char *expanded;
89
90 if (!path)
91 return config_error_nonbool("include.path");
92
93 expanded = expand_user_path(path);
94 if (!expanded)
95 return error("Could not expand include path '%s'", path);
96 path = expanded;
97
98 /*
99 * Use an absolute path as-is, but interpret relative paths
100 * based on the including config file.
101 */
102 if (!is_absolute_path(path)) {
103 char *slash;
104
105 if (!cf || !cf->path)
106 return error("relative config includes must come from files");
107
108 slash = find_last_dir_sep(cf->path);
109 if (slash)
110 strbuf_add(&buf, cf->path, slash - cf->path + 1);
111 strbuf_addstr(&buf, path);
112 path = buf.buf;
113 }
114
115 if (!access_or_die(path, R_OK, 0)) {
116 if (++inc->depth > MAX_INCLUDE_DEPTH)
117 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
118 cf && cf->name ? cf->name : "the command line");
119 ret = git_config_from_file(git_config_include, path, inc);
120 inc->depth--;
121 }
122 strbuf_release(&buf);
123 free(expanded);
124 return ret;
125 }
126
127 int git_config_include(const char *var, const char *value, void *data)
128 {
129 struct config_include_data *inc = data;
130 const char *type;
131 int ret;
132
133 /*
134 * Pass along all values, including "include" directives; this makes it
135 * possible to query information on the includes themselves.
136 */
137 ret = inc->fn(var, value, inc->data);
138 if (ret < 0)
139 return ret;
140
141 type = skip_prefix(var, "include.");
142 if (!type)
143 return ret;
144
145 if (!strcmp(type, "path"))
146 ret = handle_path_include(value, inc);
147 return ret;
148 }
149
150 void git_config_push_parameter(const char *text)
151 {
152 struct strbuf env = STRBUF_INIT;
153 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
154 if (old) {
155 strbuf_addstr(&env, old);
156 strbuf_addch(&env, ' ');
157 }
158 sq_quote_buf(&env, text);
159 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
160 strbuf_release(&env);
161 }
162
163 int git_config_parse_parameter(const char *text,
164 config_fn_t fn, void *data)
165 {
166 struct strbuf **pair;
167 pair = strbuf_split_str(text, '=', 2);
168 if (!pair[0])
169 return error("bogus config parameter: %s", text);
170 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=')
171 strbuf_setlen(pair[0], pair[0]->len - 1);
172 strbuf_trim(pair[0]);
173 if (!pair[0]->len) {
174 strbuf_list_free(pair);
175 return error("bogus config parameter: %s", text);
176 }
177 strbuf_tolower(pair[0]);
178 if (fn(pair[0]->buf, pair[1] ? pair[1]->buf : NULL, data) < 0) {
179 strbuf_list_free(pair);
180 return -1;
181 }
182 strbuf_list_free(pair);
183 return 0;
184 }
185
186 int git_config_from_parameters(config_fn_t fn, void *data)
187 {
188 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
189 char *envw;
190 const char **argv = NULL;
191 int nr = 0, alloc = 0;
192 int i;
193
194 if (!env)
195 return 0;
196 /* sq_dequote will write over it */
197 envw = xstrdup(env);
198
199 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
200 free(envw);
201 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
202 }
203
204 for (i = 0; i < nr; i++) {
205 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
206 free(argv);
207 free(envw);
208 return -1;
209 }
210 }
211
212 free(argv);
213 free(envw);
214 return nr > 0;
215 }
216
217 static int get_next_char(void)
218 {
219 int c = cf->do_fgetc(cf);
220
221 if (c == '\r') {
222 /* DOS like systems */
223 c = cf->do_fgetc(cf);
224 if (c != '\n') {
225 cf->do_ungetc(c, cf);
226 c = '\r';
227 }
228 }
229 if (c == '\n')
230 cf->linenr++;
231 if (c == EOF) {
232 cf->eof = 1;
233 c = '\n';
234 }
235 return c;
236 }
237
238 static char *parse_value(void)
239 {
240 int quote = 0, comment = 0, space = 0;
241
242 strbuf_reset(&cf->value);
243 for (;;) {
244 int c = get_next_char();
245 if (c == '\n') {
246 if (quote) {
247 cf->linenr--;
248 return NULL;
249 }
250 return cf->value.buf;
251 }
252 if (comment)
253 continue;
254 if (isspace(c) && !quote) {
255 if (cf->value.len)
256 space++;
257 continue;
258 }
259 if (!quote) {
260 if (c == ';' || c == '#') {
261 comment = 1;
262 continue;
263 }
264 }
265 for (; space; space--)
266 strbuf_addch(&cf->value, ' ');
267 if (c == '\\') {
268 c = get_next_char();
269 switch (c) {
270 case '\n':
271 continue;
272 case 't':
273 c = '\t';
274 break;
275 case 'b':
276 c = '\b';
277 break;
278 case 'n':
279 c = '\n';
280 break;
281 /* Some characters escape as themselves */
282 case '\\': case '"':
283 break;
284 /* Reject unknown escape sequences */
285 default:
286 return NULL;
287 }
288 strbuf_addch(&cf->value, c);
289 continue;
290 }
291 if (c == '"') {
292 quote = 1-quote;
293 continue;
294 }
295 strbuf_addch(&cf->value, c);
296 }
297 }
298
299 static inline int iskeychar(int c)
300 {
301 return isalnum(c) || c == '-';
302 }
303
304 static int get_value(config_fn_t fn, void *data, struct strbuf *name)
305 {
306 int c;
307 char *value;
308
309 /* Get the full name */
310 for (;;) {
311 c = get_next_char();
312 if (cf->eof)
313 break;
314 if (!iskeychar(c))
315 break;
316 strbuf_addch(name, tolower(c));
317 }
318
319 while (c == ' ' || c == '\t')
320 c = get_next_char();
321
322 value = NULL;
323 if (c != '\n') {
324 if (c != '=')
325 return -1;
326 value = parse_value();
327 if (!value)
328 return -1;
329 }
330 return fn(name->buf, value, data);
331 }
332
333 static int get_extended_base_var(struct strbuf *name, int c)
334 {
335 do {
336 if (c == '\n')
337 goto error_incomplete_line;
338 c = get_next_char();
339 } while (isspace(c));
340
341 /* We require the format to be '[base "extension"]' */
342 if (c != '"')
343 return -1;
344 strbuf_addch(name, '.');
345
346 for (;;) {
347 int c = get_next_char();
348 if (c == '\n')
349 goto error_incomplete_line;
350 if (c == '"')
351 break;
352 if (c == '\\') {
353 c = get_next_char();
354 if (c == '\n')
355 goto error_incomplete_line;
356 }
357 strbuf_addch(name, c);
358 }
359
360 /* Final ']' */
361 if (get_next_char() != ']')
362 return -1;
363 return 0;
364 error_incomplete_line:
365 cf->linenr--;
366 return -1;
367 }
368
369 static int get_base_var(struct strbuf *name)
370 {
371 for (;;) {
372 int c = get_next_char();
373 if (cf->eof)
374 return -1;
375 if (c == ']')
376 return 0;
377 if (isspace(c))
378 return get_extended_base_var(name, c);
379 if (!iskeychar(c) && c != '.')
380 return -1;
381 strbuf_addch(name, tolower(c));
382 }
383 }
384
385 static int git_parse_source(config_fn_t fn, void *data)
386 {
387 int comment = 0;
388 int baselen = 0;
389 struct strbuf *var = &cf->var;
390
391 /* U+FEFF Byte Order Mark in UTF8 */
392 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
393 const unsigned char *bomptr = utf8_bom;
394
395 for (;;) {
396 int c = get_next_char();
397 if (bomptr && *bomptr) {
398 /* We are at the file beginning; skip UTF8-encoded BOM
399 * if present. Sane editors won't put this in on their
400 * own, but e.g. Windows Notepad will do it happily. */
401 if ((unsigned char) c == *bomptr) {
402 bomptr++;
403 continue;
404 } else {
405 /* Do not tolerate partial BOM. */
406 if (bomptr != utf8_bom)
407 break;
408 /* No BOM at file beginning. Cool. */
409 bomptr = NULL;
410 }
411 }
412 if (c == '\n') {
413 if (cf->eof)
414 return 0;
415 comment = 0;
416 continue;
417 }
418 if (comment || isspace(c))
419 continue;
420 if (c == '#' || c == ';') {
421 comment = 1;
422 continue;
423 }
424 if (c == '[') {
425 /* Reset prior to determining a new stem */
426 strbuf_reset(var);
427 if (get_base_var(var) < 0 || var->len < 1)
428 break;
429 strbuf_addch(var, '.');
430 baselen = var->len;
431 continue;
432 }
433 if (!isalpha(c))
434 break;
435 /*
436 * Truncate the var name back to the section header
437 * stem prior to grabbing the suffix part of the name
438 * and the value.
439 */
440 strbuf_setlen(var, baselen);
441 strbuf_addch(var, tolower(c));
442 if (get_value(fn, data, var) < 0)
443 break;
444 }
445 if (cf->die_on_error)
446 die("bad config file line %d in %s", cf->linenr, cf->name);
447 else
448 return error("bad config file line %d in %s", cf->linenr, cf->name);
449 }
450
451 static int parse_unit_factor(const char *end, uintmax_t *val)
452 {
453 if (!*end)
454 return 1;
455 else if (!strcasecmp(end, "k")) {
456 *val *= 1024;
457 return 1;
458 }
459 else if (!strcasecmp(end, "m")) {
460 *val *= 1024 * 1024;
461 return 1;
462 }
463 else if (!strcasecmp(end, "g")) {
464 *val *= 1024 * 1024 * 1024;
465 return 1;
466 }
467 return 0;
468 }
469
470 static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
471 {
472 if (value && *value) {
473 char *end;
474 intmax_t val;
475 uintmax_t uval;
476 uintmax_t factor = 1;
477
478 errno = 0;
479 val = strtoimax(value, &end, 0);
480 if (errno == ERANGE)
481 return 0;
482 if (!parse_unit_factor(end, &factor)) {
483 errno = EINVAL;
484 return 0;
485 }
486 uval = abs(val);
487 uval *= factor;
488 if (uval > max || abs(val) > uval) {
489 errno = ERANGE;
490 return 0;
491 }
492 val *= factor;
493 *ret = val;
494 return 1;
495 }
496 errno = EINVAL;
497 return 0;
498 }
499
500 static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
501 {
502 if (value && *value) {
503 char *end;
504 uintmax_t val;
505 uintmax_t oldval;
506
507 errno = 0;
508 val = strtoumax(value, &end, 0);
509 if (errno == ERANGE)
510 return 0;
511 oldval = val;
512 if (!parse_unit_factor(end, &val)) {
513 errno = EINVAL;
514 return 0;
515 }
516 if (val > max || oldval > val) {
517 errno = ERANGE;
518 return 0;
519 }
520 *ret = val;
521 return 1;
522 }
523 errno = EINVAL;
524 return 0;
525 }
526
527 static int git_parse_int(const char *value, int *ret)
528 {
529 intmax_t tmp;
530 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
531 return 0;
532 *ret = tmp;
533 return 1;
534 }
535
536 static int git_parse_int64(const char *value, int64_t *ret)
537 {
538 intmax_t tmp;
539 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
540 return 0;
541 *ret = tmp;
542 return 1;
543 }
544
545 int git_parse_ulong(const char *value, unsigned long *ret)
546 {
547 uintmax_t tmp;
548 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
549 return 0;
550 *ret = tmp;
551 return 1;
552 }
553
554 NORETURN
555 static void die_bad_number(const char *name, const char *value)
556 {
557 const char *reason = errno == ERANGE ?
558 "out of range" :
559 "invalid unit";
560 if (!value)
561 value = "";
562
563 if (cf && cf->name)
564 die("bad numeric config value '%s' for '%s' in %s: %s",
565 value, name, cf->name, reason);
566 die("bad numeric config value '%s' for '%s': %s", value, name, reason);
567 }
568
569 int git_config_int(const char *name, const char *value)
570 {
571 int ret;
572 if (!git_parse_int(value, &ret))
573 die_bad_number(name, value);
574 return ret;
575 }
576
577 int64_t git_config_int64(const char *name, const char *value)
578 {
579 int64_t ret;
580 if (!git_parse_int64(value, &ret))
581 die_bad_number(name, value);
582 return ret;
583 }
584
585 unsigned long git_config_ulong(const char *name, const char *value)
586 {
587 unsigned long ret;
588 if (!git_parse_ulong(value, &ret))
589 die_bad_number(name, value);
590 return ret;
591 }
592
593 static int git_config_maybe_bool_text(const char *name, const char *value)
594 {
595 if (!value)
596 return 1;
597 if (!*value)
598 return 0;
599 if (!strcasecmp(value, "true")
600 || !strcasecmp(value, "yes")
601 || !strcasecmp(value, "on"))
602 return 1;
603 if (!strcasecmp(value, "false")
604 || !strcasecmp(value, "no")
605 || !strcasecmp(value, "off"))
606 return 0;
607 return -1;
608 }
609
610 int git_config_maybe_bool(const char *name, const char *value)
611 {
612 int v = git_config_maybe_bool_text(name, value);
613 if (0 <= v)
614 return v;
615 if (git_parse_int(value, &v))
616 return !!v;
617 return -1;
618 }
619
620 int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
621 {
622 int v = git_config_maybe_bool_text(name, value);
623 if (0 <= v) {
624 *is_bool = 1;
625 return v;
626 }
627 *is_bool = 0;
628 return git_config_int(name, value);
629 }
630
631 int git_config_bool(const char *name, const char *value)
632 {
633 int discard;
634 return !!git_config_bool_or_int(name, value, &discard);
635 }
636
637 int git_config_string(const char **dest, const char *var, const char *value)
638 {
639 if (!value)
640 return config_error_nonbool(var);
641 *dest = xstrdup(value);
642 return 0;
643 }
644
645 int git_config_pathname(const char **dest, const char *var, const char *value)
646 {
647 if (!value)
648 return config_error_nonbool(var);
649 *dest = expand_user_path(value);
650 if (!*dest)
651 die("Failed to expand user dir in: '%s'", value);
652 return 0;
653 }
654
655 static int git_default_core_config(const char *var, const char *value)
656 {
657 /* This needs a better name */
658 if (!strcmp(var, "core.filemode")) {
659 trust_executable_bit = git_config_bool(var, value);
660 return 0;
661 }
662 if (!strcmp(var, "core.trustctime")) {
663 trust_ctime = git_config_bool(var, value);
664 return 0;
665 }
666 if (!strcmp(var, "core.checkstat")) {
667 if (!strcasecmp(value, "default"))
668 check_stat = 1;
669 else if (!strcasecmp(value, "minimal"))
670 check_stat = 0;
671 }
672
673 if (!strcmp(var, "core.quotepath")) {
674 quote_path_fully = git_config_bool(var, value);
675 return 0;
676 }
677
678 if (!strcmp(var, "core.symlinks")) {
679 has_symlinks = git_config_bool(var, value);
680 return 0;
681 }
682
683 if (!strcmp(var, "core.ignorecase")) {
684 ignore_case = git_config_bool(var, value);
685 return 0;
686 }
687
688 if (!strcmp(var, "core.attributesfile"))
689 return git_config_pathname(&git_attributes_file, var, value);
690
691 if (!strcmp(var, "core.bare")) {
692 is_bare_repository_cfg = git_config_bool(var, value);
693 return 0;
694 }
695
696 if (!strcmp(var, "core.ignorestat")) {
697 assume_unchanged = git_config_bool(var, value);
698 return 0;
699 }
700
701 if (!strcmp(var, "core.prefersymlinkrefs")) {
702 prefer_symlink_refs = git_config_bool(var, value);
703 return 0;
704 }
705
706 if (!strcmp(var, "core.logallrefupdates")) {
707 log_all_ref_updates = git_config_bool(var, value);
708 return 0;
709 }
710
711 if (!strcmp(var, "core.warnambiguousrefs")) {
712 warn_ambiguous_refs = git_config_bool(var, value);
713 return 0;
714 }
715
716 if (!strcmp(var, "core.abbrev")) {
717 int abbrev = git_config_int(var, value);
718 if (abbrev < minimum_abbrev || abbrev > 40)
719 return -1;
720 default_abbrev = abbrev;
721 return 0;
722 }
723
724 if (!strcmp(var, "core.loosecompression")) {
725 int level = git_config_int(var, value);
726 if (level == -1)
727 level = Z_DEFAULT_COMPRESSION;
728 else if (level < 0 || level > Z_BEST_COMPRESSION)
729 die("bad zlib compression level %d", level);
730 zlib_compression_level = level;
731 zlib_compression_seen = 1;
732 return 0;
733 }
734
735 if (!strcmp(var, "core.compression")) {
736 int level = git_config_int(var, value);
737 if (level == -1)
738 level = Z_DEFAULT_COMPRESSION;
739 else if (level < 0 || level > Z_BEST_COMPRESSION)
740 die("bad zlib compression level %d", level);
741 core_compression_level = level;
742 core_compression_seen = 1;
743 if (!zlib_compression_seen)
744 zlib_compression_level = level;
745 return 0;
746 }
747
748 if (!strcmp(var, "core.packedgitwindowsize")) {
749 int pgsz_x2 = getpagesize() * 2;
750 packed_git_window_size = git_config_ulong(var, value);
751
752 /* This value must be multiple of (pagesize * 2) */
753 packed_git_window_size /= pgsz_x2;
754 if (packed_git_window_size < 1)
755 packed_git_window_size = 1;
756 packed_git_window_size *= pgsz_x2;
757 return 0;
758 }
759
760 if (!strcmp(var, "core.bigfilethreshold")) {
761 big_file_threshold = git_config_ulong(var, value);
762 return 0;
763 }
764
765 if (!strcmp(var, "core.packedgitlimit")) {
766 packed_git_limit = git_config_ulong(var, value);
767 return 0;
768 }
769
770 if (!strcmp(var, "core.deltabasecachelimit")) {
771 delta_base_cache_limit = git_config_ulong(var, value);
772 return 0;
773 }
774
775 if (!strcmp(var, "core.autocrlf")) {
776 if (value && !strcasecmp(value, "input")) {
777 if (core_eol == EOL_CRLF)
778 return error("core.autocrlf=input conflicts with core.eol=crlf");
779 auto_crlf = AUTO_CRLF_INPUT;
780 return 0;
781 }
782 auto_crlf = git_config_bool(var, value);
783 return 0;
784 }
785
786 if (!strcmp(var, "core.safecrlf")) {
787 if (value && !strcasecmp(value, "warn")) {
788 safe_crlf = SAFE_CRLF_WARN;
789 return 0;
790 }
791 safe_crlf = git_config_bool(var, value);
792 return 0;
793 }
794
795 if (!strcmp(var, "core.eol")) {
796 if (value && !strcasecmp(value, "lf"))
797 core_eol = EOL_LF;
798 else if (value && !strcasecmp(value, "crlf"))
799 core_eol = EOL_CRLF;
800 else if (value && !strcasecmp(value, "native"))
801 core_eol = EOL_NATIVE;
802 else
803 core_eol = EOL_UNSET;
804 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
805 return error("core.autocrlf=input conflicts with core.eol=crlf");
806 return 0;
807 }
808
809 if (!strcmp(var, "core.notesref")) {
810 notes_ref_name = xstrdup(value);
811 return 0;
812 }
813
814 if (!strcmp(var, "core.pager"))
815 return git_config_string(&pager_program, var, value);
816
817 if (!strcmp(var, "core.editor"))
818 return git_config_string(&editor_program, var, value);
819
820 if (!strcmp(var, "core.commentchar")) {
821 const char *comment;
822 int ret = git_config_string(&comment, var, value);
823 if (ret)
824 return ret;
825 else if (!strcasecmp(comment, "auto"))
826 auto_comment_line_char = 1;
827 else if (comment[0] && !comment[1]) {
828 comment_line_char = comment[0];
829 auto_comment_line_char = 0;
830 } else
831 return error("core.commentChar should only be one character");
832 return 0;
833 }
834
835 if (!strcmp(var, "core.askpass"))
836 return git_config_string(&askpass_program, var, value);
837
838 if (!strcmp(var, "core.excludesfile"))
839 return git_config_pathname(&excludes_file, var, value);
840
841 if (!strcmp(var, "core.whitespace")) {
842 if (!value)
843 return config_error_nonbool(var);
844 whitespace_rule_cfg = parse_whitespace_rule(value);
845 return 0;
846 }
847
848 if (!strcmp(var, "core.fsyncobjectfiles")) {
849 fsync_object_files = git_config_bool(var, value);
850 return 0;
851 }
852
853 if (!strcmp(var, "core.preloadindex")) {
854 core_preload_index = git_config_bool(var, value);
855 return 0;
856 }
857
858 if (!strcmp(var, "core.createobject")) {
859 if (!strcmp(value, "rename"))
860 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
861 else if (!strcmp(value, "link"))
862 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
863 else
864 die("Invalid mode for object creation: %s", value);
865 return 0;
866 }
867
868 if (!strcmp(var, "core.sparsecheckout")) {
869 core_apply_sparse_checkout = git_config_bool(var, value);
870 return 0;
871 }
872
873 if (!strcmp(var, "core.precomposeunicode")) {
874 precomposed_unicode = git_config_bool(var, value);
875 return 0;
876 }
877
878 /* Add other config variables here and to Documentation/config.txt. */
879 return 0;
880 }
881
882 static int git_default_i18n_config(const char *var, const char *value)
883 {
884 if (!strcmp(var, "i18n.commitencoding"))
885 return git_config_string(&git_commit_encoding, var, value);
886
887 if (!strcmp(var, "i18n.logoutputencoding"))
888 return git_config_string(&git_log_output_encoding, var, value);
889
890 /* Add other config variables here and to Documentation/config.txt. */
891 return 0;
892 }
893
894 static int git_default_branch_config(const char *var, const char *value)
895 {
896 if (!strcmp(var, "branch.autosetupmerge")) {
897 if (value && !strcasecmp(value, "always")) {
898 git_branch_track = BRANCH_TRACK_ALWAYS;
899 return 0;
900 }
901 git_branch_track = git_config_bool(var, value);
902 return 0;
903 }
904 if (!strcmp(var, "branch.autosetuprebase")) {
905 if (!value)
906 return config_error_nonbool(var);
907 else if (!strcmp(value, "never"))
908 autorebase = AUTOREBASE_NEVER;
909 else if (!strcmp(value, "local"))
910 autorebase = AUTOREBASE_LOCAL;
911 else if (!strcmp(value, "remote"))
912 autorebase = AUTOREBASE_REMOTE;
913 else if (!strcmp(value, "always"))
914 autorebase = AUTOREBASE_ALWAYS;
915 else
916 return error("Malformed value for %s", var);
917 return 0;
918 }
919
920 /* Add other config variables here and to Documentation/config.txt. */
921 return 0;
922 }
923
924 static int git_default_push_config(const char *var, const char *value)
925 {
926 if (!strcmp(var, "push.default")) {
927 if (!value)
928 return config_error_nonbool(var);
929 else if (!strcmp(value, "nothing"))
930 push_default = PUSH_DEFAULT_NOTHING;
931 else if (!strcmp(value, "matching"))
932 push_default = PUSH_DEFAULT_MATCHING;
933 else if (!strcmp(value, "simple"))
934 push_default = PUSH_DEFAULT_SIMPLE;
935 else if (!strcmp(value, "upstream"))
936 push_default = PUSH_DEFAULT_UPSTREAM;
937 else if (!strcmp(value, "tracking")) /* deprecated */
938 push_default = PUSH_DEFAULT_UPSTREAM;
939 else if (!strcmp(value, "current"))
940 push_default = PUSH_DEFAULT_CURRENT;
941 else {
942 error("Malformed value for %s: %s", var, value);
943 return error("Must be one of nothing, matching, simple, "
944 "upstream or current.");
945 }
946 return 0;
947 }
948
949 /* Add other config variables here and to Documentation/config.txt. */
950 return 0;
951 }
952
953 static int git_default_mailmap_config(const char *var, const char *value)
954 {
955 if (!strcmp(var, "mailmap.file"))
956 return git_config_pathname(&git_mailmap_file, var, value);
957 if (!strcmp(var, "mailmap.blob"))
958 return git_config_string(&git_mailmap_blob, var, value);
959
960 /* Add other config variables here and to Documentation/config.txt. */
961 return 0;
962 }
963
964 int git_default_config(const char *var, const char *value, void *dummy)
965 {
966 if (starts_with(var, "core."))
967 return git_default_core_config(var, value);
968
969 if (starts_with(var, "user."))
970 return git_ident_config(var, value, dummy);
971
972 if (starts_with(var, "i18n."))
973 return git_default_i18n_config(var, value);
974
975 if (starts_with(var, "branch."))
976 return git_default_branch_config(var, value);
977
978 if (starts_with(var, "push."))
979 return git_default_push_config(var, value);
980
981 if (starts_with(var, "mailmap."))
982 return git_default_mailmap_config(var, value);
983
984 if (starts_with(var, "advice."))
985 return git_default_advice_config(var, value);
986
987 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
988 pager_use_color = git_config_bool(var,value);
989 return 0;
990 }
991
992 if (!strcmp(var, "pack.packsizelimit")) {
993 pack_size_limit_cfg = git_config_ulong(var, value);
994 return 0;
995 }
996 /* Add other config variables here and to Documentation/config.txt. */
997 return 0;
998 }
999
1000 /*
1001 * All source specific fields in the union, die_on_error, name and the callbacks
1002 * fgetc, ungetc, ftell of top need to be initialized before calling
1003 * this function.
1004 */
1005 static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
1006 {
1007 int ret;
1008
1009 /* push config-file parsing state stack */
1010 top->prev = cf;
1011 top->linenr = 1;
1012 top->eof = 0;
1013 strbuf_init(&top->value, 1024);
1014 strbuf_init(&top->var, 1024);
1015 cf = top;
1016
1017 ret = git_parse_source(fn, data);
1018
1019 /* pop config-file parsing state stack */
1020 strbuf_release(&top->value);
1021 strbuf_release(&top->var);
1022 cf = top->prev;
1023
1024 return ret;
1025 }
1026
1027 static int do_config_from_file(config_fn_t fn,
1028 const char *name, const char *path, FILE *f, void *data)
1029 {
1030 struct config_source top;
1031
1032 top.u.file = f;
1033 top.name = name;
1034 top.path = path;
1035 top.die_on_error = 1;
1036 top.do_fgetc = config_file_fgetc;
1037 top.do_ungetc = config_file_ungetc;
1038 top.do_ftell = config_file_ftell;
1039
1040 return do_config_from(&top, fn, data);
1041 }
1042
1043 static int git_config_from_stdin(config_fn_t fn, void *data)
1044 {
1045 return do_config_from_file(fn, "<stdin>", NULL, stdin, data);
1046 }
1047
1048 int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1049 {
1050 int ret = -1;
1051 FILE *f;
1052
1053 f = fopen(filename, "r");
1054 if (f) {
1055 ret = do_config_from_file(fn, filename, filename, f, data);
1056 fclose(f);
1057 }
1058 return ret;
1059 }
1060
1061 int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1062 size_t len, void *data)
1063 {
1064 struct config_source top;
1065
1066 top.u.buf.buf = buf;
1067 top.u.buf.len = len;
1068 top.u.buf.pos = 0;
1069 top.name = name;
1070 top.path = NULL;
1071 top.die_on_error = 0;
1072 top.do_fgetc = config_buf_fgetc;
1073 top.do_ungetc = config_buf_ungetc;
1074 top.do_ftell = config_buf_ftell;
1075
1076 return do_config_from(&top, fn, data);
1077 }
1078
1079 static int git_config_from_blob_sha1(config_fn_t fn,
1080 const char *name,
1081 const unsigned char *sha1,
1082 void *data)
1083 {
1084 enum object_type type;
1085 char *buf;
1086 unsigned long size;
1087 int ret;
1088
1089 buf = read_sha1_file(sha1, &type, &size);
1090 if (!buf)
1091 return error("unable to load config blob object '%s'", name);
1092 if (type != OBJ_BLOB) {
1093 free(buf);
1094 return error("reference '%s' does not point to a blob", name);
1095 }
1096
1097 ret = git_config_from_buf(fn, name, buf, size, data);
1098 free(buf);
1099
1100 return ret;
1101 }
1102
1103 static int git_config_from_blob_ref(config_fn_t fn,
1104 const char *name,
1105 void *data)
1106 {
1107 unsigned char sha1[20];
1108
1109 if (get_sha1(name, sha1) < 0)
1110 return error("unable to resolve config blob '%s'", name);
1111 return git_config_from_blob_sha1(fn, name, sha1, data);
1112 }
1113
1114 const char *git_etc_gitconfig(void)
1115 {
1116 static const char *system_wide;
1117 if (!system_wide)
1118 system_wide = system_path(ETC_GITCONFIG);
1119 return system_wide;
1120 }
1121
1122 int git_env_bool(const char *k, int def)
1123 {
1124 const char *v = getenv(k);
1125 return v ? git_config_bool(k, v) : def;
1126 }
1127
1128 int git_config_system(void)
1129 {
1130 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1131 }
1132
1133 int git_config_early(config_fn_t fn, void *data, const char *repo_config)
1134 {
1135 int ret = 0, found = 0;
1136 char *xdg_config = NULL;
1137 char *user_config = NULL;
1138
1139 home_config_paths(&user_config, &xdg_config, "config");
1140
1141 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
1142 ret += git_config_from_file(fn, git_etc_gitconfig(),
1143 data);
1144 found += 1;
1145 }
1146
1147 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
1148 ret += git_config_from_file(fn, xdg_config, data);
1149 found += 1;
1150 }
1151
1152 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
1153 ret += git_config_from_file(fn, user_config, data);
1154 found += 1;
1155 }
1156
1157 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
1158 ret += git_config_from_file(fn, repo_config, data);
1159 found += 1;
1160 }
1161
1162 switch (git_config_from_parameters(fn, data)) {
1163 case -1: /* error */
1164 die("unable to parse command-line config");
1165 break;
1166 case 0: /* found nothing */
1167 break;
1168 default: /* found at least one item */
1169 found++;
1170 break;
1171 }
1172
1173 free(xdg_config);
1174 free(user_config);
1175 return ret == 0 ? found : ret;
1176 }
1177
1178 int git_config_with_options(config_fn_t fn, void *data,
1179 struct git_config_source *config_source,
1180 int respect_includes)
1181 {
1182 char *repo_config = NULL;
1183 int ret;
1184 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1185
1186 if (respect_includes) {
1187 inc.fn = fn;
1188 inc.data = data;
1189 fn = git_config_include;
1190 data = &inc;
1191 }
1192
1193 /*
1194 * If we have a specific filename, use it. Otherwise, follow the
1195 * regular lookup sequence.
1196 */
1197 if (config_source && config_source->use_stdin)
1198 return git_config_from_stdin(fn, data);
1199 else if (config_source && config_source->file)
1200 return git_config_from_file(fn, config_source->file, data);
1201 else if (config_source && config_source->blob)
1202 return git_config_from_blob_ref(fn, config_source->blob, data);
1203
1204 repo_config = git_pathdup("config");
1205 ret = git_config_early(fn, data, repo_config);
1206 if (repo_config)
1207 free(repo_config);
1208 return ret;
1209 }
1210
1211 int git_config(config_fn_t fn, void *data)
1212 {
1213 return git_config_with_options(fn, data, NULL, 1);
1214 }
1215
1216 /*
1217 * Find all the stuff for git_config_set() below.
1218 */
1219
1220 static struct {
1221 int baselen;
1222 char *key;
1223 int do_not_match;
1224 regex_t *value_regex;
1225 int multi_replace;
1226 size_t *offset;
1227 unsigned int offset_alloc;
1228 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1229 int seen;
1230 } store;
1231
1232 static int matches(const char *key, const char *value)
1233 {
1234 return !strcmp(key, store.key) &&
1235 (store.value_regex == NULL ||
1236 (store.do_not_match ^
1237 !regexec(store.value_regex, value, 0, NULL, 0)));
1238 }
1239
1240 static int store_aux(const char *key, const char *value, void *cb)
1241 {
1242 const char *ep;
1243 size_t section_len;
1244
1245 switch (store.state) {
1246 case KEY_SEEN:
1247 if (matches(key, value)) {
1248 if (store.seen == 1 && store.multi_replace == 0) {
1249 warning("%s has multiple values", key);
1250 }
1251
1252 ALLOC_GROW(store.offset, store.seen + 1,
1253 store.offset_alloc);
1254
1255 store.offset[store.seen] = cf->do_ftell(cf);
1256 store.seen++;
1257 }
1258 break;
1259 case SECTION_SEEN:
1260 /*
1261 * What we are looking for is in store.key (both
1262 * section and var), and its section part is baselen
1263 * long. We found key (again, both section and var).
1264 * We would want to know if this key is in the same
1265 * section as what we are looking for. We already
1266 * know we are in the same section as what should
1267 * hold store.key.
1268 */
1269 ep = strrchr(key, '.');
1270 section_len = ep - key;
1271
1272 if ((section_len != store.baselen) ||
1273 memcmp(key, store.key, section_len+1)) {
1274 store.state = SECTION_END_SEEN;
1275 break;
1276 }
1277
1278 /*
1279 * Do not increment matches: this is no match, but we
1280 * just made sure we are in the desired section.
1281 */
1282 ALLOC_GROW(store.offset, store.seen + 1,
1283 store.offset_alloc);
1284 store.offset[store.seen] = cf->do_ftell(cf);
1285 /* fallthru */
1286 case SECTION_END_SEEN:
1287 case START:
1288 if (matches(key, value)) {
1289 ALLOC_GROW(store.offset, store.seen + 1,
1290 store.offset_alloc);
1291 store.offset[store.seen] = cf->do_ftell(cf);
1292 store.state = KEY_SEEN;
1293 store.seen++;
1294 } else {
1295 if (strrchr(key, '.') - key == store.baselen &&
1296 !strncmp(key, store.key, store.baselen)) {
1297 store.state = SECTION_SEEN;
1298 ALLOC_GROW(store.offset,
1299 store.seen + 1,
1300 store.offset_alloc);
1301 store.offset[store.seen] = cf->do_ftell(cf);
1302 }
1303 }
1304 }
1305 return 0;
1306 }
1307
1308 static int write_error(const char *filename)
1309 {
1310 error("failed to write new configuration file %s", filename);
1311
1312 /* Same error code as "failed to rename". */
1313 return 4;
1314 }
1315
1316 static int store_write_section(int fd, const char *key)
1317 {
1318 const char *dot;
1319 int i, success;
1320 struct strbuf sb = STRBUF_INIT;
1321
1322 dot = memchr(key, '.', store.baselen);
1323 if (dot) {
1324 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1325 for (i = dot - key + 1; i < store.baselen; i++) {
1326 if (key[i] == '"' || key[i] == '\\')
1327 strbuf_addch(&sb, '\\');
1328 strbuf_addch(&sb, key[i]);
1329 }
1330 strbuf_addstr(&sb, "\"]\n");
1331 } else {
1332 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
1333 }
1334
1335 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1336 strbuf_release(&sb);
1337
1338 return success;
1339 }
1340
1341 static int store_write_pair(int fd, const char *key, const char *value)
1342 {
1343 int i, success;
1344 int length = strlen(key + store.baselen + 1);
1345 const char *quote = "";
1346 struct strbuf sb = STRBUF_INIT;
1347
1348 /*
1349 * Check to see if the value needs to be surrounded with a dq pair.
1350 * Note that problematic characters are always backslash-quoted; this
1351 * check is about not losing leading or trailing SP and strings that
1352 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1353 * configuration parser.
1354 */
1355 if (value[0] == ' ')
1356 quote = "\"";
1357 for (i = 0; value[i]; i++)
1358 if (value[i] == ';' || value[i] == '#')
1359 quote = "\"";
1360 if (i && value[i - 1] == ' ')
1361 quote = "\"";
1362
1363 strbuf_addf(&sb, "\t%.*s = %s",
1364 length, key + store.baselen + 1, quote);
1365
1366 for (i = 0; value[i]; i++)
1367 switch (value[i]) {
1368 case '\n':
1369 strbuf_addstr(&sb, "\\n");
1370 break;
1371 case '\t':
1372 strbuf_addstr(&sb, "\\t");
1373 break;
1374 case '"':
1375 case '\\':
1376 strbuf_addch(&sb, '\\');
1377 default:
1378 strbuf_addch(&sb, value[i]);
1379 break;
1380 }
1381 strbuf_addf(&sb, "%s\n", quote);
1382
1383 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1384 strbuf_release(&sb);
1385
1386 return success;
1387 }
1388
1389 static ssize_t find_beginning_of_line(const char *contents, size_t size,
1390 size_t offset_, int *found_bracket)
1391 {
1392 size_t equal_offset = size, bracket_offset = size;
1393 ssize_t offset;
1394
1395 contline:
1396 for (offset = offset_-2; offset > 0
1397 && contents[offset] != '\n'; offset--)
1398 switch (contents[offset]) {
1399 case '=': equal_offset = offset; break;
1400 case ']': bracket_offset = offset; break;
1401 }
1402 if (offset > 0 && contents[offset-1] == '\\') {
1403 offset_ = offset;
1404 goto contline;
1405 }
1406 if (bracket_offset < equal_offset) {
1407 *found_bracket = 1;
1408 offset = bracket_offset+1;
1409 } else
1410 offset++;
1411
1412 return offset;
1413 }
1414
1415 int git_config_set_in_file(const char *config_filename,
1416 const char *key, const char *value)
1417 {
1418 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1419 }
1420
1421 int git_config_set(const char *key, const char *value)
1422 {
1423 return git_config_set_multivar(key, value, NULL, 0);
1424 }
1425
1426 /*
1427 * Auxiliary function to sanity-check and split the key into the section
1428 * identifier and variable name.
1429 *
1430 * Returns 0 on success, -1 when there is an invalid character in the key and
1431 * -2 if there is no section name in the key.
1432 *
1433 * store_key - pointer to char* which will hold a copy of the key with
1434 * lowercase section and variable name
1435 * baselen - pointer to int which will hold the length of the
1436 * section + subsection part, can be NULL
1437 */
1438 int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1439 {
1440 int i, dot, baselen;
1441 const char *last_dot = strrchr(key, '.');
1442
1443 /*
1444 * Since "key" actually contains the section name and the real
1445 * key name separated by a dot, we have to know where the dot is.
1446 */
1447
1448 if (last_dot == NULL || last_dot == key) {
1449 error("key does not contain a section: %s", key);
1450 return -CONFIG_NO_SECTION_OR_NAME;
1451 }
1452
1453 if (!last_dot[1]) {
1454 error("key does not contain variable name: %s", key);
1455 return -CONFIG_NO_SECTION_OR_NAME;
1456 }
1457
1458 baselen = last_dot - key;
1459 if (baselen_)
1460 *baselen_ = baselen;
1461
1462 /*
1463 * Validate the key and while at it, lower case it for matching.
1464 */
1465 *store_key = xmalloc(strlen(key) + 1);
1466
1467 dot = 0;
1468 for (i = 0; key[i]; i++) {
1469 unsigned char c = key[i];
1470 if (c == '.')
1471 dot = 1;
1472 /* Leave the extended basename untouched.. */
1473 if (!dot || i > baselen) {
1474 if (!iskeychar(c) ||
1475 (i == baselen + 1 && !isalpha(c))) {
1476 error("invalid key: %s", key);
1477 goto out_free_ret_1;
1478 }
1479 c = tolower(c);
1480 } else if (c == '\n') {
1481 error("invalid key (newline): %s", key);
1482 goto out_free_ret_1;
1483 }
1484 (*store_key)[i] = c;
1485 }
1486 (*store_key)[i] = 0;
1487
1488 return 0;
1489
1490 out_free_ret_1:
1491 free(*store_key);
1492 *store_key = NULL;
1493 return -CONFIG_INVALID_KEY;
1494 }
1495
1496 /*
1497 * If value==NULL, unset in (remove from) config,
1498 * if value_regex!=NULL, disregard key/value pairs where value does not match.
1499 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1500 * else all matching key/values (regardless how many) are removed,
1501 * before the new pair is written.
1502 *
1503 * Returns 0 on success.
1504 *
1505 * This function does this:
1506 *
1507 * - it locks the config file by creating ".git/config.lock"
1508 *
1509 * - it then parses the config using store_aux() as validator to find
1510 * the position on the key/value pair to replace. If it is to be unset,
1511 * it must be found exactly once.
1512 *
1513 * - the config file is mmap()ed and the part before the match (if any) is
1514 * written to the lock file, then the changed part and the rest.
1515 *
1516 * - the config file is removed and the lock file rename()d to it.
1517 *
1518 */
1519 int git_config_set_multivar_in_file(const char *config_filename,
1520 const char *key, const char *value,
1521 const char *value_regex, int multi_replace)
1522 {
1523 int fd = -1, in_fd;
1524 int ret;
1525 struct lock_file *lock = NULL;
1526 char *filename_buf = NULL;
1527
1528 /* parse-key returns negative; flip the sign to feed exit(3) */
1529 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1530 if (ret)
1531 goto out_free;
1532
1533 store.multi_replace = multi_replace;
1534
1535 if (!config_filename)
1536 config_filename = filename_buf = git_pathdup("config");
1537
1538 /*
1539 * The lock serves a purpose in addition to locking: the new
1540 * contents of .git/config will be written into it.
1541 */
1542 lock = xcalloc(1, sizeof(struct lock_file));
1543 fd = hold_lock_file_for_update(lock, config_filename, 0);
1544 if (fd < 0) {
1545 error("could not lock config file %s: %s", config_filename, strerror(errno));
1546 free(store.key);
1547 ret = CONFIG_NO_LOCK;
1548 goto out_free;
1549 }
1550
1551 /*
1552 * If .git/config does not exist yet, write a minimal version.
1553 */
1554 in_fd = open(config_filename, O_RDONLY);
1555 if ( in_fd < 0 ) {
1556 free(store.key);
1557
1558 if ( ENOENT != errno ) {
1559 error("opening %s: %s", config_filename,
1560 strerror(errno));
1561 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
1562 goto out_free;
1563 }
1564 /* if nothing to unset, error out */
1565 if (value == NULL) {
1566 ret = CONFIG_NOTHING_SET;
1567 goto out_free;
1568 }
1569
1570 store.key = (char *)key;
1571 if (!store_write_section(fd, key) ||
1572 !store_write_pair(fd, key, value))
1573 goto write_err_out;
1574 } else {
1575 struct stat st;
1576 char *contents;
1577 size_t contents_sz, copy_begin, copy_end;
1578 int i, new_line = 0;
1579
1580 if (value_regex == NULL)
1581 store.value_regex = NULL;
1582 else {
1583 if (value_regex[0] == '!') {
1584 store.do_not_match = 1;
1585 value_regex++;
1586 } else
1587 store.do_not_match = 0;
1588
1589 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
1590 if (regcomp(store.value_regex, value_regex,
1591 REG_EXTENDED)) {
1592 error("invalid pattern: %s", value_regex);
1593 free(store.value_regex);
1594 ret = CONFIG_INVALID_PATTERN;
1595 goto out_free;
1596 }
1597 }
1598
1599 ALLOC_GROW(store.offset, 1, store.offset_alloc);
1600 store.offset[0] = 0;
1601 store.state = START;
1602 store.seen = 0;
1603
1604 /*
1605 * After this, store.offset will contain the *end* offset
1606 * of the last match, or remain at 0 if no match was found.
1607 * As a side effect, we make sure to transform only a valid
1608 * existing config file.
1609 */
1610 if (git_config_from_file(store_aux, config_filename, NULL)) {
1611 error("invalid config file %s", config_filename);
1612 free(store.key);
1613 if (store.value_regex != NULL) {
1614 regfree(store.value_regex);
1615 free(store.value_regex);
1616 }
1617 ret = CONFIG_INVALID_FILE;
1618 goto out_free;
1619 }
1620
1621 free(store.key);
1622 if (store.value_regex != NULL) {
1623 regfree(store.value_regex);
1624 free(store.value_regex);
1625 }
1626
1627 /* if nothing to unset, or too many matches, error out */
1628 if ((store.seen == 0 && value == NULL) ||
1629 (store.seen > 1 && multi_replace == 0)) {
1630 ret = CONFIG_NOTHING_SET;
1631 goto out_free;
1632 }
1633
1634 fstat(in_fd, &st);
1635 contents_sz = xsize_t(st.st_size);
1636 contents = xmmap(NULL, contents_sz, PROT_READ,
1637 MAP_PRIVATE, in_fd, 0);
1638 close(in_fd);
1639
1640 if (fchmod(fd, st.st_mode & 07777) < 0) {
1641 error("fchmod on %s failed: %s",
1642 lock->filename, strerror(errno));
1643 ret = CONFIG_NO_WRITE;
1644 goto out_free;
1645 }
1646
1647 if (store.seen == 0)
1648 store.seen = 1;
1649
1650 for (i = 0, copy_begin = 0; i < store.seen; i++) {
1651 if (store.offset[i] == 0) {
1652 store.offset[i] = copy_end = contents_sz;
1653 } else if (store.state != KEY_SEEN) {
1654 copy_end = store.offset[i];
1655 } else
1656 copy_end = find_beginning_of_line(
1657 contents, contents_sz,
1658 store.offset[i]-2, &new_line);
1659
1660 if (copy_end > 0 && contents[copy_end-1] != '\n')
1661 new_line = 1;
1662
1663 /* write the first part of the config */
1664 if (copy_end > copy_begin) {
1665 if (write_in_full(fd, contents + copy_begin,
1666 copy_end - copy_begin) <
1667 copy_end - copy_begin)
1668 goto write_err_out;
1669 if (new_line &&
1670 write_str_in_full(fd, "\n") != 1)
1671 goto write_err_out;
1672 }
1673 copy_begin = store.offset[i];
1674 }
1675
1676 /* write the pair (value == NULL means unset) */
1677 if (value != NULL) {
1678 if (store.state == START) {
1679 if (!store_write_section(fd, key))
1680 goto write_err_out;
1681 }
1682 if (!store_write_pair(fd, key, value))
1683 goto write_err_out;
1684 }
1685
1686 /* write the rest of the config */
1687 if (copy_begin < contents_sz)
1688 if (write_in_full(fd, contents + copy_begin,
1689 contents_sz - copy_begin) <
1690 contents_sz - copy_begin)
1691 goto write_err_out;
1692
1693 munmap(contents, contents_sz);
1694 }
1695
1696 if (commit_lock_file(lock) < 0) {
1697 error("could not commit config file %s", config_filename);
1698 ret = CONFIG_NO_WRITE;
1699 goto out_free;
1700 }
1701
1702 /*
1703 * lock is committed, so don't try to roll it back below.
1704 * NOTE: Since lockfile.c keeps a linked list of all created
1705 * lock_file structures, it isn't safe to free(lock). It's
1706 * better to just leave it hanging around.
1707 */
1708 lock = NULL;
1709 ret = 0;
1710
1711 out_free:
1712 if (lock)
1713 rollback_lock_file(lock);
1714 free(filename_buf);
1715 return ret;
1716
1717 write_err_out:
1718 ret = write_error(lock->filename);
1719 goto out_free;
1720
1721 }
1722
1723 int git_config_set_multivar(const char *key, const char *value,
1724 const char *value_regex, int multi_replace)
1725 {
1726 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
1727 multi_replace);
1728 }
1729
1730 static int section_name_match (const char *buf, const char *name)
1731 {
1732 int i = 0, j = 0, dot = 0;
1733 if (buf[i] != '[')
1734 return 0;
1735 for (i = 1; buf[i] && buf[i] != ']'; i++) {
1736 if (!dot && isspace(buf[i])) {
1737 dot = 1;
1738 if (name[j++] != '.')
1739 break;
1740 for (i++; isspace(buf[i]); i++)
1741 ; /* do nothing */
1742 if (buf[i] != '"')
1743 break;
1744 continue;
1745 }
1746 if (buf[i] == '\\' && dot)
1747 i++;
1748 else if (buf[i] == '"' && dot) {
1749 for (i++; isspace(buf[i]); i++)
1750 ; /* do_nothing */
1751 break;
1752 }
1753 if (buf[i] != name[j++])
1754 break;
1755 }
1756 if (buf[i] == ']' && name[j] == 0) {
1757 /*
1758 * We match, now just find the right length offset by
1759 * gobbling up any whitespace after it, as well
1760 */
1761 i++;
1762 for (; buf[i] && isspace(buf[i]); i++)
1763 ; /* do nothing */
1764 return i;
1765 }
1766 return 0;
1767 }
1768
1769 static int section_name_is_ok(const char *name)
1770 {
1771 /* Empty section names are bogus. */
1772 if (!*name)
1773 return 0;
1774
1775 /*
1776 * Before a dot, we must be alphanumeric or dash. After the first dot,
1777 * anything goes, so we can stop checking.
1778 */
1779 for (; *name && *name != '.'; name++)
1780 if (*name != '-' && !isalnum(*name))
1781 return 0;
1782 return 1;
1783 }
1784
1785 /* if new_name == NULL, the section is removed instead */
1786 int git_config_rename_section_in_file(const char *config_filename,
1787 const char *old_name, const char *new_name)
1788 {
1789 int ret = 0, remove = 0;
1790 char *filename_buf = NULL;
1791 struct lock_file *lock;
1792 int out_fd;
1793 char buf[1024];
1794 FILE *config_file;
1795 struct stat st;
1796
1797 if (new_name && !section_name_is_ok(new_name)) {
1798 ret = error("invalid section name: %s", new_name);
1799 goto out;
1800 }
1801
1802 if (!config_filename)
1803 config_filename = filename_buf = git_pathdup("config");
1804
1805 lock = xcalloc(1, sizeof(struct lock_file));
1806 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1807 if (out_fd < 0) {
1808 ret = error("could not lock config file %s", config_filename);
1809 goto out;
1810 }
1811
1812 if (!(config_file = fopen(config_filename, "rb"))) {
1813 /* no config file means nothing to rename, no error */
1814 goto unlock_and_out;
1815 }
1816
1817 fstat(fileno(config_file), &st);
1818
1819 if (fchmod(out_fd, st.st_mode & 07777) < 0) {
1820 ret = error("fchmod on %s failed: %s",
1821 lock->filename, strerror(errno));
1822 goto out;
1823 }
1824
1825 while (fgets(buf, sizeof(buf), config_file)) {
1826 int i;
1827 int length;
1828 char *output = buf;
1829 for (i = 0; buf[i] && isspace(buf[i]); i++)
1830 ; /* do nothing */
1831 if (buf[i] == '[') {
1832 /* it's a section */
1833 int offset = section_name_match(&buf[i], old_name);
1834 if (offset > 0) {
1835 ret++;
1836 if (new_name == NULL) {
1837 remove = 1;
1838 continue;
1839 }
1840 store.baselen = strlen(new_name);
1841 if (!store_write_section(out_fd, new_name)) {
1842 ret = write_error(lock->filename);
1843 goto out;
1844 }
1845 /*
1846 * We wrote out the new section, with
1847 * a newline, now skip the old
1848 * section's length
1849 */
1850 output += offset + i;
1851 if (strlen(output) > 0) {
1852 /*
1853 * More content means there's
1854 * a declaration to put on the
1855 * next line; indent with a
1856 * tab
1857 */
1858 output -= 1;
1859 output[0] = '\t';
1860 }
1861 }
1862 remove = 0;
1863 }
1864 if (remove)
1865 continue;
1866 length = strlen(output);
1867 if (write_in_full(out_fd, output, length) != length) {
1868 ret = write_error(lock->filename);
1869 goto out;
1870 }
1871 }
1872 fclose(config_file);
1873 unlock_and_out:
1874 if (commit_lock_file(lock) < 0)
1875 ret = error("could not commit config file %s", config_filename);
1876 out:
1877 free(filename_buf);
1878 return ret;
1879 }
1880
1881 int git_config_rename_section(const char *old_name, const char *new_name)
1882 {
1883 return git_config_rename_section_in_file(NULL, old_name, new_name);
1884 }
1885
1886 /*
1887 * Call this to report error for your variable that should not
1888 * get a boolean value (i.e. "[my] var" means "true").
1889 */
1890 #undef config_error_nonbool
1891 int config_error_nonbool(const char *var)
1892 {
1893 return error("Missing value for '%s'", var);
1894 }
1895
1896 int parse_config_key(const char *var,
1897 const char *section,
1898 const char **subsection, int *subsection_len,
1899 const char **key)
1900 {
1901 int section_len = strlen(section);
1902 const char *dot;
1903
1904 /* Does it start with "section." ? */
1905 if (!starts_with(var, section) || var[section_len] != '.')
1906 return -1;
1907
1908 /*
1909 * Find the key; we don't know yet if we have a subsection, but we must
1910 * parse backwards from the end, since the subsection may have dots in
1911 * it, too.
1912 */
1913 dot = strrchr(var, '.');
1914 *key = dot + 1;
1915
1916 /* Did we have a subsection at all? */
1917 if (dot == var + section_len) {
1918 *subsection = NULL;
1919 *subsection_len = 0;
1920 }
1921 else {
1922 *subsection = var + section_len + 1;
1923 *subsection_len = dot - *subsection;
1924 }
1925
1926 return 0;
1927 }