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