config.c: fix mmap leak when writing config
[git/git.git] / config.c
CommitLineData
10bea152
JS
1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 * Copyright (C) Johannes Schindelin, 2005
6 *
7 */
17712991 8#include "cache.h"
697cc8ef 9#include "lockfile.h"
7f0e39fa 10#include "exec_cmd.h"
572e4f6a 11#include "strbuf.h"
2b64fc89 12#include "quote.h"
3c8687a7
TA
13#include "hashmap.h"
14#include "string-list.h"
17712991 15
4d8dd149
HV
16struct config_source {
17 struct config_source *prev;
18 union {
19 FILE *file;
1bc88819
HV
20 struct config_buf {
21 const char *buf;
22 size_t len;
23 size_t pos;
24 } buf;
4d8dd149 25 } u;
924aaf3e 26 const char *name;
d14d4244 27 const char *path;
b2dc0945 28 int die_on_error;
924aaf3e
RJ
29 int linenr;
30 int eof;
31 struct strbuf value;
0971e992 32 struct strbuf var;
924aaf3e 33
49d6cfa5
JK
34 int (*do_fgetc)(struct config_source *c);
35 int (*do_ungetc)(int c, struct config_source *conf);
36 long (*do_ftell)(struct config_source *c);
4d8dd149
HV
37};
38
39static struct config_source *cf;
924aaf3e 40
960ccca6
DH
41static int zlib_compression_seen;
42
3c8687a7
TA
43/*
44 * Default config_set that contains key-value pairs from the usual set of config
45 * config files (i.e repo specific .git/config, user wide ~/.gitconfig, XDG
46 * config file and the global /etc/gitconfig)
47 */
48static struct config_set the_config_set;
49
4d8dd149
HV
50static int config_file_fgetc(struct config_source *conf)
51{
52 return fgetc(conf->u.file);
53}
54
55static int config_file_ungetc(int c, struct config_source *conf)
56{
57 return ungetc(c, conf->u.file);
58}
59
60static long config_file_ftell(struct config_source *conf)
61{
62 return ftell(conf->u.file);
63}
64
1bc88819
HV
65
66static int config_buf_fgetc(struct config_source *conf)
67{
68 if (conf->u.buf.pos < conf->u.buf.len)
69 return conf->u.buf.buf[conf->u.buf.pos++];
70
71 return EOF;
72}
73
74static int config_buf_ungetc(int c, struct config_source *conf)
75{
76 if (conf->u.buf.pos > 0)
77 return conf->u.buf.buf[--conf->u.buf.pos];
78
79 return EOF;
80}
81
82static long config_buf_ftell(struct config_source *conf)
83{
84 return conf->u.buf.pos;
85}
86
9b25a0b5
JK
87#define MAX_INCLUDE_DEPTH 10
88static const char include_depth_advice[] =
89"exceeded maximum include depth (%d) while including\n"
90" %s\n"
91"from\n"
92" %s\n"
93"Do you have circular includes?";
94static int handle_path_include(const char *path, struct config_include_data *inc)
95{
96 int ret = 0;
97 struct strbuf buf = STRBUF_INIT;
67beb600 98 char *expanded;
4c0a89fc 99
67beb600
JK
100 if (!path)
101 return config_error_nonbool("include.path");
102
103 expanded = expand_user_path(path);
4c0a89fc
JK
104 if (!expanded)
105 return error("Could not expand include path '%s'", path);
106 path = expanded;
9b25a0b5
JK
107
108 /*
109 * Use an absolute path as-is, but interpret relative paths
110 * based on the including config file.
111 */
112 if (!is_absolute_path(path)) {
113 char *slash;
114
d14d4244 115 if (!cf || !cf->path)
9b25a0b5
JK
116 return error("relative config includes must come from files");
117
d14d4244 118 slash = find_last_dir_sep(cf->path);
9b25a0b5 119 if (slash)
d14d4244 120 strbuf_add(&buf, cf->path, slash - cf->path + 1);
9b25a0b5
JK
121 strbuf_addstr(&buf, path);
122 path = buf.buf;
123 }
124
4698c8fe 125 if (!access_or_die(path, R_OK, 0)) {
9b25a0b5
JK
126 if (++inc->depth > MAX_INCLUDE_DEPTH)
127 die(include_depth_advice, MAX_INCLUDE_DEPTH, path,
128 cf && cf->name ? cf->name : "the command line");
129 ret = git_config_from_file(git_config_include, path, inc);
130 inc->depth--;
131 }
132 strbuf_release(&buf);
4c0a89fc 133 free(expanded);
9b25a0b5
JK
134 return ret;
135}
136
137int git_config_include(const char *var, const char *value, void *data)
138{
139 struct config_include_data *inc = data;
9b25a0b5
JK
140 int ret;
141
142 /*
143 * Pass along all values, including "include" directives; this makes it
144 * possible to query information on the includes themselves.
145 */
146 ret = inc->fn(var, value, inc->data);
147 if (ret < 0)
148 return ret;
149
37007c3a 150 if (!strcmp(var, "include.path"))
9b25a0b5
JK
151 ret = handle_path_include(value, inc);
152 return ret;
153}
154
2b64fc89
JK
155void git_config_push_parameter(const char *text)
156{
157 struct strbuf env = STRBUF_INIT;
158 const char *old = getenv(CONFIG_DATA_ENVIRONMENT);
159 if (old) {
160 strbuf_addstr(&env, old);
161 strbuf_addch(&env, ' ');
162 }
163 sq_quote_buf(&env, text);
164 setenv(CONFIG_DATA_ENVIRONMENT, env.buf, 1);
165 strbuf_release(&env);
166}
167
2496844b
JK
168int git_config_parse_parameter(const char *text,
169 config_fn_t fn, void *data)
8b1fa778 170{
a789ca70 171 const char *value;
572e4f6a 172 struct strbuf **pair;
a789ca70 173
f77bccae 174 pair = strbuf_split_str(text, '=', 2);
c5d6350b
JK
175 if (!pair[0])
176 return error("bogus config parameter: %s", text);
a789ca70
JH
177
178 if (pair[0]->len && pair[0]->buf[pair[0]->len - 1] == '=') {
572e4f6a 179 strbuf_setlen(pair[0], pair[0]->len - 1);
a789ca70
JH
180 value = pair[1] ? pair[1]->buf : "";
181 } else {
182 value = NULL;
183 }
184
572e4f6a
AR
185 strbuf_trim(pair[0]);
186 if (!pair[0]->len) {
187 strbuf_list_free(pair);
06eb708f 188 return error("bogus config parameter: %s", text);
8b1fa778 189 }
ffb20ce1 190 strbuf_tolower(pair[0]);
a789ca70 191 if (fn(pair[0]->buf, value, data) < 0) {
06eb708f
JK
192 strbuf_list_free(pair);
193 return -1;
572e4f6a
AR
194 }
195 strbuf_list_free(pair);
8b1fa778
AR
196 return 0;
197}
198
06eb708f
JK
199int git_config_from_parameters(config_fn_t fn, void *data)
200{
2b64fc89
JK
201 const char *env = getenv(CONFIG_DATA_ENVIRONMENT);
202 char *envw;
203 const char **argv = NULL;
204 int nr = 0, alloc = 0;
205 int i;
206
207 if (!env)
208 return 0;
209 /* sq_dequote will write over it */
210 envw = xstrdup(env);
211
212 if (sq_dequote_to_argv(envw, &argv, &nr, &alloc) < 0) {
213 free(envw);
214 return error("bogus format in " CONFIG_DATA_ENVIRONMENT);
215 }
216
217 for (i = 0; i < nr; i++) {
06eb708f 218 if (git_config_parse_parameter(argv[i], fn, data) < 0) {
2b64fc89
JK
219 free(argv);
220 free(envw);
221 return -1;
222 }
223 }
224
225 free(argv);
226 free(envw);
06eb708f 227 return nr > 0;
2b64fc89
JK
228}
229
17712991
LT
230static int get_next_char(void)
231{
49d6cfa5 232 int c = cf->do_fgetc(cf);
17712991 233
dbb9a812
HV
234 if (c == '\r') {
235 /* DOS like systems */
49d6cfa5 236 c = cf->do_fgetc(cf);
dbb9a812 237 if (c != '\n') {
49d6cfa5 238 cf->do_ungetc(c, cf);
dbb9a812 239 c = '\r';
17712991
LT
240 }
241 }
dbb9a812
HV
242 if (c == '\n')
243 cf->linenr++;
244 if (c == EOF) {
245 cf->eof = 1;
b3b3f60b 246 cf->linenr++;
dbb9a812
HV
247 c = '\n';
248 }
17712991
LT
249 return c;
250}
251
252static char *parse_value(void)
253{
e96c19c5 254 int quote = 0, comment = 0, space = 0;
17712991 255
924aaf3e 256 strbuf_reset(&cf->value);
17712991
LT
257 for (;;) {
258 int c = get_next_char();
17712991 259 if (c == '\n') {
4b340593
MS
260 if (quote) {
261 cf->linenr--;
17712991 262 return NULL;
4b340593 263 }
924aaf3e 264 return cf->value.buf;
17712991
LT
265 }
266 if (comment)
267 continue;
268 if (isspace(c) && !quote) {
924aaf3e 269 if (cf->value.len)
ebdaae37 270 space++;
17712991
LT
271 continue;
272 }
7ebdba61
JS
273 if (!quote) {
274 if (c == ';' || c == '#') {
275 comment = 1;
276 continue;
277 }
278 }
ebdaae37 279 for (; space; space--)
924aaf3e 280 strbuf_addch(&cf->value, ' ');
17712991
LT
281 if (c == '\\') {
282 c = get_next_char();
283 switch (c) {
284 case '\n':
285 continue;
286 case 't':
287 c = '\t';
288 break;
289 case 'b':
290 c = '\b';
291 break;
292 case 'n':
293 c = '\n';
294 break;
5cbb401d
LT
295 /* Some characters escape as themselves */
296 case '\\': case '"':
297 break;
298 /* Reject unknown escape sequences */
299 default:
300 return NULL;
17712991 301 }
924aaf3e 302 strbuf_addch(&cf->value, c);
17712991
LT
303 continue;
304 }
305 if (c == '"') {
306 quote = 1-quote;
307 continue;
308 }
924aaf3e 309 strbuf_addch(&cf->value, c);
17712991
LT
310 }
311}
312
38c5afa8
LT
313static inline int iskeychar(int c)
314{
315 return isalnum(c) || c == '-';
316}
317
0971e992 318static int get_value(config_fn_t fn, void *data, struct strbuf *name)
17712991
LT
319{
320 int c;
321 char *value;
b3b3f60b 322 int ret;
17712991
LT
323
324 /* Get the full name */
325 for (;;) {
326 c = get_next_char();
924aaf3e 327 if (cf->eof)
17712991 328 break;
38c5afa8 329 if (!iskeychar(c))
17712991 330 break;
0971e992 331 strbuf_addch(name, tolower(c));
17712991 332 }
0971e992 333
17712991
LT
334 while (c == ' ' || c == '\t')
335 c = get_next_char();
336
337 value = NULL;
338 if (c != '\n') {
339 if (c != '=')
340 return -1;
341 value = parse_value();
342 if (!value)
343 return -1;
344 }
b3b3f60b
MM
345 /*
346 * We already consumed the \n, but we need linenr to point to
347 * the line we just parsed during the call to fn to get
348 * accurate line number in error messages.
349 */
350 cf->linenr--;
351 ret = fn(name->buf, value, data);
352 cf->linenr++;
353 return ret;
17712991
LT
354}
355
0971e992 356static int get_extended_base_var(struct strbuf *name, int c)
d14f7764
LT
357{
358 do {
359 if (c == '\n')
4b340593 360 goto error_incomplete_line;
d14f7764
LT
361 c = get_next_char();
362 } while (isspace(c));
363
364 /* We require the format to be '[base "extension"]' */
365 if (c != '"')
366 return -1;
0971e992 367 strbuf_addch(name, '.');
d14f7764
LT
368
369 for (;;) {
370 int c = get_next_char();
371 if (c == '\n')
4b340593 372 goto error_incomplete_line;
d14f7764
LT
373 if (c == '"')
374 break;
375 if (c == '\\') {
376 c = get_next_char();
377 if (c == '\n')
4b340593 378 goto error_incomplete_line;
d14f7764 379 }
0971e992 380 strbuf_addch(name, c);
d14f7764
LT
381 }
382
383 /* Final ']' */
384 if (get_next_char() != ']')
385 return -1;
0971e992 386 return 0;
4b340593
MS
387error_incomplete_line:
388 cf->linenr--;
389 return -1;
d14f7764
LT
390}
391
0971e992 392static int get_base_var(struct strbuf *name)
17712991 393{
17712991
LT
394 for (;;) {
395 int c = get_next_char();
924aaf3e 396 if (cf->eof)
17712991
LT
397 return -1;
398 if (c == ']')
0971e992 399 return 0;
d14f7764 400 if (isspace(c))
0971e992 401 return get_extended_base_var(name, c);
38c5afa8 402 if (!iskeychar(c) && c != '.')
17712991 403 return -1;
0971e992 404 strbuf_addch(name, tolower(c));
17712991
LT
405 }
406}
407
4d8dd149 408static int git_parse_source(config_fn_t fn, void *data)
17712991
LT
409{
410 int comment = 0;
411 int baselen = 0;
0971e992 412 struct strbuf *var = &cf->var;
17712991 413
de056402
PB
414 /* U+FEFF Byte Order Mark in UTF8 */
415 static const unsigned char *utf8_bom = (unsigned char *) "\xef\xbb\xbf";
416 const unsigned char *bomptr = utf8_bom;
417
17712991
LT
418 for (;;) {
419 int c = get_next_char();
de056402
PB
420 if (bomptr && *bomptr) {
421 /* We are at the file beginning; skip UTF8-encoded BOM
422 * if present. Sane editors won't put this in on their
423 * own, but e.g. Windows Notepad will do it happily. */
424 if ((unsigned char) c == *bomptr) {
425 bomptr++;
426 continue;
427 } else {
428 /* Do not tolerate partial BOM. */
429 if (bomptr != utf8_bom)
430 break;
431 /* No BOM at file beginning. Cool. */
432 bomptr = NULL;
433 }
434 }
17712991 435 if (c == '\n') {
924aaf3e 436 if (cf->eof)
17712991
LT
437 return 0;
438 comment = 0;
439 continue;
440 }
441 if (comment || isspace(c))
442 continue;
443 if (c == '#' || c == ';') {
444 comment = 1;
445 continue;
446 }
447 if (c == '[') {
0971e992
BW
448 /* Reset prior to determining a new stem */
449 strbuf_reset(var);
450 if (get_base_var(var) < 0 || var->len < 1)
17712991 451 break;
0971e992
BW
452 strbuf_addch(var, '.');
453 baselen = var->len;
17712991
LT
454 continue;
455 }
456 if (!isalpha(c))
457 break;
0971e992
BW
458 /*
459 * Truncate the var name back to the section header
460 * stem prior to grabbing the suffix part of the name
461 * and the value.
462 */
463 strbuf_setlen(var, baselen);
464 strbuf_addch(var, tolower(c));
465 if (get_value(fn, data, var) < 0)
17712991
LT
466 break;
467 }
b2dc0945 468 if (cf->die_on_error)
8262aaa2 469 die(_("bad config file line %d in %s"), cf->linenr, cf->name);
b2dc0945 470 else
8262aaa2 471 return error(_("bad config file line %d in %s"), cf->linenr, cf->name);
17712991
LT
472}
473
ebaa1bd4 474static int parse_unit_factor(const char *end, uintmax_t *val)
0b87b6e0
BD
475{
476 if (!*end)
477 return 1;
c8deb5a1
SP
478 else if (!strcasecmp(end, "k")) {
479 *val *= 1024;
480 return 1;
481 }
482 else if (!strcasecmp(end, "m")) {
483 *val *= 1024 * 1024;
484 return 1;
485 }
486 else if (!strcasecmp(end, "g")) {
487 *val *= 1024 * 1024 * 1024;
488 return 1;
489 }
490 return 0;
0b87b6e0
BD
491}
492
7192777d 493static int git_parse_signed(const char *value, intmax_t *ret, intmax_t max)
0b87b6e0
BD
494{
495 if (value && *value) {
496 char *end;
ebaa1bd4
NA
497 intmax_t val;
498 uintmax_t uval;
499 uintmax_t factor = 1;
500
501 errno = 0;
502 val = strtoimax(value, &end, 0);
503 if (errno == ERANGE)
504 return 0;
33fdd77e
JK
505 if (!parse_unit_factor(end, &factor)) {
506 errno = EINVAL;
c8deb5a1 507 return 0;
33fdd77e 508 }
83915ba5 509 uval = labs(val);
ebaa1bd4 510 uval *= factor;
83915ba5 511 if (uval > max || labs(val) > uval) {
33fdd77e 512 errno = ERANGE;
ebaa1bd4 513 return 0;
33fdd77e 514 }
ebaa1bd4
NA
515 val *= factor;
516 *ret = val;
0b87b6e0
BD
517 return 1;
518 }
33fdd77e 519 errno = EINVAL;
0b87b6e0
BD
520 return 0;
521}
522
0b4dc661 523static int git_parse_unsigned(const char *value, uintmax_t *ret, uintmax_t max)
17712991
LT
524{
525 if (value && *value) {
526 char *end;
ebaa1bd4
NA
527 uintmax_t val;
528 uintmax_t oldval;
529
530 errno = 0;
531 val = strtoumax(value, &end, 0);
532 if (errno == ERANGE)
533 return 0;
534 oldval = val;
33fdd77e
JK
535 if (!parse_unit_factor(end, &val)) {
536 errno = EINVAL;
c8deb5a1 537 return 0;
33fdd77e
JK
538 }
539 if (val > max || oldval > val) {
540 errno = ERANGE;
ebaa1bd4 541 return 0;
33fdd77e 542 }
c8deb5a1 543 *ret = val;
0b87b6e0 544 return 1;
17712991 545 }
33fdd77e 546 errno = EINVAL;
0b87b6e0
BD
547 return 0;
548}
549
42d194e9 550static int git_parse_int(const char *value, int *ret)
c1867cea 551{
7192777d 552 intmax_t tmp;
42d194e9 553 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int)))
7192777d
JK
554 return 0;
555 *ret = tmp;
556 return 1;
557}
558
00160242
JK
559static int git_parse_int64(const char *value, int64_t *ret)
560{
561 intmax_t tmp;
562 if (!git_parse_signed(value, &tmp, maximum_signed_value_of_type(int64_t)))
563 return 0;
564 *ret = tmp;
565 return 1;
566}
567
7192777d
JK
568int git_parse_ulong(const char *value, unsigned long *ret)
569{
570 uintmax_t tmp;
571 if (!git_parse_unsigned(value, &tmp, maximum_unsigned_value_of_type(long)))
572 return 0;
573 *ret = tmp;
574 return 1;
575}
576
06bdc23b 577NORETURN
2f666581 578static void die_bad_number(const char *name, const char *value)
c1867cea 579{
2f666581
JK
580 const char *reason = errno == ERANGE ?
581 "out of range" :
582 "invalid unit";
583 if (!value)
584 value = "";
585
924aaf3e 586 if (cf && cf->name)
8262aaa2 587 die(_("bad numeric config value '%s' for '%s' in %s: %s"),
2f666581 588 value, name, cf->name, reason);
8262aaa2 589 die(_("bad numeric config value '%s' for '%s': %s"), value, name, reason);
c1867cea
JK
590}
591
0b87b6e0
BD
592int git_config_int(const char *name, const char *value)
593{
42d194e9
JK
594 int ret;
595 if (!git_parse_int(value, &ret))
2f666581 596 die_bad_number(name, value);
0b87b6e0
BD
597 return ret;
598}
599
00160242
JK
600int64_t git_config_int64(const char *name, const char *value)
601{
602 int64_t ret;
603 if (!git_parse_int64(value, &ret))
604 die_bad_number(name, value);
0b87b6e0
BD
605 return ret;
606}
607
608unsigned long git_config_ulong(const char *name, const char *value)
609{
610 unsigned long ret;
611 if (!git_parse_ulong(value, &ret))
2f666581 612 die_bad_number(name, value);
0b87b6e0 613 return ret;
17712991
LT
614}
615
b2be2f6a 616static int git_config_maybe_bool_text(const char *name, const char *value)
17712991
LT
617{
618 if (!value)
619 return 1;
620 if (!*value)
621 return 0;
8420ccd8
JH
622 if (!strcasecmp(value, "true")
623 || !strcasecmp(value, "yes")
624 || !strcasecmp(value, "on"))
17712991 625 return 1;
8420ccd8
JH
626 if (!strcasecmp(value, "false")
627 || !strcasecmp(value, "no")
628 || !strcasecmp(value, "off"))
17712991 629 return 0;
8420ccd8
JH
630 return -1;
631}
632
b2be2f6a
JK
633int git_config_maybe_bool(const char *name, const char *value)
634{
42d194e9 635 int v = git_config_maybe_bool_text(name, value);
b2be2f6a
JK
636 if (0 <= v)
637 return v;
42d194e9 638 if (git_parse_int(value, &v))
db6195ef 639 return !!v;
b2be2f6a
JK
640 return -1;
641}
642
8420ccd8
JH
643int git_config_bool_or_int(const char *name, const char *value, int *is_bool)
644{
b2be2f6a 645 int v = git_config_maybe_bool_text(name, value);
8420ccd8
JH
646 if (0 <= v) {
647 *is_bool = 1;
648 return v;
649 }
a53f2ec6 650 *is_bool = 0;
c35b0b58 651 return git_config_int(name, value);
17712991
LT
652}
653
a53f2ec6
JH
654int git_config_bool(const char *name, const char *value)
655{
656 int discard;
c35b0b58 657 return !!git_config_bool_or_int(name, value, &discard);
a53f2ec6
JH
658}
659
ea5105a5
CC
660int git_config_string(const char **dest, const char *var, const char *value)
661{
662 if (!value)
663 return config_error_nonbool(var);
664 *dest = xstrdup(value);
665 return 0;
666}
667
395de250
MM
668int git_config_pathname(const char **dest, const char *var, const char *value)
669{
670 if (!value)
671 return config_error_nonbool(var);
672 *dest = expand_user_path(value);
673 if (!*dest)
8262aaa2 674 die(_("failed to expand user dir in: '%s'"), value);
395de250
MM
675 return 0;
676}
677
806e2ad7 678static int git_default_core_config(const char *var, const char *value)
17712991
LT
679{
680 /* This needs a better name */
681 if (!strcmp(var, "core.filemode")) {
682 trust_executable_bit = git_config_bool(var, value);
683 return 0;
684 }
1ce4790b
AR
685 if (!strcmp(var, "core.trustctime")) {
686 trust_ctime = git_config_bool(var, value);
687 return 0;
688 }
c1b5d738 689 if (!strcmp(var, "core.checkstat")) {
c08e4d5b
RR
690 if (!strcasecmp(value, "default"))
691 check_stat = 1;
692 else if (!strcasecmp(value, "minimal"))
693 check_stat = 0;
694 }
17712991 695
9378c161
JH
696 if (!strcmp(var, "core.quotepath")) {
697 quote_path_fully = git_config_bool(var, value);
698 return 0;
699 }
700
78a8d641
JS
701 if (!strcmp(var, "core.symlinks")) {
702 has_symlinks = git_config_bool(var, value);
703 return 0;
704 }
705
0a9b88b7
LT
706 if (!strcmp(var, "core.ignorecase")) {
707 ignore_case = git_config_bool(var, value);
708 return 0;
709 }
710
64589a03
JH
711 if (!strcmp(var, "core.attributesfile"))
712 return git_config_pathname(&git_attributes_file, var, value);
713
7d1864ce
JH
714 if (!strcmp(var, "core.bare")) {
715 is_bare_repository_cfg = git_config_bool(var, value);
716 return 0;
717 }
718
5f73076c
JH
719 if (!strcmp(var, "core.ignorestat")) {
720 assume_unchanged = git_config_bool(var, value);
721 return 0;
722 }
723
e388c738
JH
724 if (!strcmp(var, "core.prefersymlinkrefs")) {
725 prefer_symlink_refs = git_config_bool(var, value);
f8348be3
JS
726 return 0;
727 }
728
6de08ae6
SP
729 if (!strcmp(var, "core.logallrefupdates")) {
730 log_all_ref_updates = git_config_bool(var, value);
731 return 0;
732 }
733
2f8acdb3
JH
734 if (!strcmp(var, "core.warnambiguousrefs")) {
735 warn_ambiguous_refs = git_config_bool(var, value);
736 return 0;
737 }
738
a71f09fe 739 if (!strcmp(var, "core.abbrev")) {
dce96489
LT
740 int abbrev = git_config_int(var, value);
741 if (abbrev < minimum_abbrev || abbrev > 40)
742 return -1;
743 default_abbrev = abbrev;
744 return 0;
745 }
746
960ccca6 747 if (!strcmp(var, "core.loosecompression")) {
12f6c308
JBH
748 int level = git_config_int(var, value);
749 if (level == -1)
750 level = Z_DEFAULT_COMPRESSION;
751 else if (level < 0 || level > Z_BEST_COMPRESSION)
8262aaa2 752 die(_("bad zlib compression level %d"), level);
12f6c308 753 zlib_compression_level = level;
960ccca6
DH
754 zlib_compression_seen = 1;
755 return 0;
756 }
757
758 if (!strcmp(var, "core.compression")) {
759 int level = git_config_int(var, value);
760 if (level == -1)
761 level = Z_DEFAULT_COMPRESSION;
762 else if (level < 0 || level > Z_BEST_COMPRESSION)
8262aaa2 763 die(_("bad zlib compression level %d"), level);
960ccca6
DH
764 core_compression_level = level;
765 core_compression_seen = 1;
766 if (!zlib_compression_seen)
767 zlib_compression_level = level;
12f6c308
JBH
768 return 0;
769 }
770
60bb8b14 771 if (!strcmp(var, "core.packedgitwindowsize")) {
5faaf246 772 int pgsz_x2 = getpagesize() * 2;
ebaa1bd4 773 packed_git_window_size = git_config_ulong(var, value);
5faaf246
JH
774
775 /* This value must be multiple of (pagesize * 2) */
776 packed_git_window_size /= pgsz_x2;
777 if (packed_git_window_size < 1)
778 packed_git_window_size = 1;
779 packed_git_window_size *= pgsz_x2;
60bb8b14
SP
780 return 0;
781 }
782
15366280 783 if (!strcmp(var, "core.bigfilethreshold")) {
ebaa1bd4 784 big_file_threshold = git_config_ulong(var, value);
15366280
JH
785 return 0;
786 }
787
77ccc5bb 788 if (!strcmp(var, "core.packedgitlimit")) {
ebaa1bd4 789 packed_git_limit = git_config_ulong(var, value);
77ccc5bb
SP
790 return 0;
791 }
792
18bdec11 793 if (!strcmp(var, "core.deltabasecachelimit")) {
ebaa1bd4 794 delta_base_cache_limit = git_config_ulong(var, value);
18bdec11
SP
795 return 0;
796 }
797
6c510bee 798 if (!strcmp(var, "core.autocrlf")) {
d7f46334 799 if (value && !strcasecmp(value, "input")) {
ec70f52f 800 if (core_eol == EOL_CRLF)
942e7747 801 return error("core.autocrlf=input conflicts with core.eol=crlf");
fd6cce9e 802 auto_crlf = AUTO_CRLF_INPUT;
d7f46334
LT
803 return 0;
804 }
6c510bee
LT
805 auto_crlf = git_config_bool(var, value);
806 return 0;
807 }
808
21e5ad50
SP
809 if (!strcmp(var, "core.safecrlf")) {
810 if (value && !strcasecmp(value, "warn")) {
811 safe_crlf = SAFE_CRLF_WARN;
812 return 0;
813 }
814 safe_crlf = git_config_bool(var, value);
815 return 0;
816 }
817
942e7747
EB
818 if (!strcmp(var, "core.eol")) {
819 if (value && !strcasecmp(value, "lf"))
ec70f52f 820 core_eol = EOL_LF;
942e7747 821 else if (value && !strcasecmp(value, "crlf"))
ec70f52f 822 core_eol = EOL_CRLF;
942e7747 823 else if (value && !strcasecmp(value, "native"))
ec70f52f 824 core_eol = EOL_NATIVE;
942e7747 825 else
ec70f52f
JH
826 core_eol = EOL_UNSET;
827 if (core_eol == EOL_CRLF && auto_crlf == AUTO_CRLF_INPUT)
942e7747
EB
828 return error("core.autocrlf=input conflicts with core.eol=crlf");
829 return 0;
830 }
831
a97a7468
JS
832 if (!strcmp(var, "core.notesref")) {
833 notes_ref_name = xstrdup(value);
834 return 0;
835 }
836
806e2ad7
LT
837 if (!strcmp(var, "core.pager"))
838 return git_config_string(&pager_program, var, value);
839
840 if (!strcmp(var, "core.editor"))
841 return git_config_string(&editor_program, var, value);
842
eff80a9f 843 if (!strcmp(var, "core.commentchar")) {
649409b7
JK
844 if (!value)
845 return config_error_nonbool(var);
ad524f83 846 else if (!strcasecmp(value, "auto"))
84c9dc2c 847 auto_comment_line_char = 1;
ad524f83 848 else if (value[0] && !value[1]) {
649409b7 849 comment_line_char = value[0];
84c9dc2c 850 auto_comment_line_char = 0;
50b54fd7
NTND
851 } else
852 return error("core.commentChar should only be one character");
853 return 0;
eff80a9f
JH
854 }
855
d3e7da89
AK
856 if (!strcmp(var, "core.askpass"))
857 return git_config_string(&askpass_program, var, value);
858
806e2ad7 859 if (!strcmp(var, "core.excludesfile"))
395de250 860 return git_config_pathname(&excludes_file, var, value);
806e2ad7
LT
861
862 if (!strcmp(var, "core.whitespace")) {
863 if (!value)
864 return config_error_nonbool(var);
865 whitespace_rule_cfg = parse_whitespace_rule(value);
866 return 0;
867 }
868
aafe9fba
LT
869 if (!strcmp(var, "core.fsyncobjectfiles")) {
870 fsync_object_files = git_config_bool(var, value);
871 return 0;
872 }
873
671c9b7e
LT
874 if (!strcmp(var, "core.preloadindex")) {
875 core_preload_index = git_config_bool(var, value);
876 return 0;
877 }
878
348df166
JS
879 if (!strcmp(var, "core.createobject")) {
880 if (!strcmp(value, "rename"))
881 object_creation_mode = OBJECT_CREATION_USES_RENAMES;
882 else if (!strcmp(value, "link"))
883 object_creation_mode = OBJECT_CREATION_USES_HARDLINKS;
884 else
8262aaa2 885 die(_("invalid mode for object creation: %s"), value);
be66a6c4
JS
886 return 0;
887 }
888
08aefc9e
NTND
889 if (!strcmp(var, "core.sparsecheckout")) {
890 core_apply_sparse_checkout = git_config_bool(var, value);
891 return 0;
892 }
893
76759c7d
TB
894 if (!strcmp(var, "core.precomposeunicode")) {
895 precomposed_unicode = git_config_bool(var, value);
896 return 0;
897 }
898
a42643aa
JK
899 if (!strcmp(var, "core.protecthfs")) {
900 protect_hfs = git_config_bool(var, value);
901 return 0;
902 }
903
2b4c6efc
JS
904 if (!strcmp(var, "core.protectntfs")) {
905 protect_ntfs = git_config_bool(var, value);
906 return 0;
76759c7d
TB
907 }
908
806e2ad7
LT
909 /* Add other config variables here and to Documentation/config.txt. */
910 return 0;
911}
912
1141f492 913static int git_default_i18n_config(const char *var, const char *value)
d1364529 914{
ea5105a5
CC
915 if (!strcmp(var, "i18n.commitencoding"))
916 return git_config_string(&git_commit_encoding, var, value);
d2c11a38 917
ea5105a5
CC
918 if (!strcmp(var, "i18n.logoutputencoding"))
919 return git_config_string(&git_log_output_encoding, var, value);
d2c11a38 920
1141f492
LT
921 /* Add other config variables here and to Documentation/config.txt. */
922 return 0;
923}
039bc64e 924
1141f492
LT
925static int git_default_branch_config(const char *var, const char *value)
926{
9ed36cfa
JS
927 if (!strcmp(var, "branch.autosetupmerge")) {
928 if (value && !strcasecmp(value, "always")) {
929 git_branch_track = BRANCH_TRACK_ALWAYS;
930 return 0;
931 }
932 git_branch_track = git_config_bool(var, value);
933 return 0;
934 }
c998ae9b
DS
935 if (!strcmp(var, "branch.autosetuprebase")) {
936 if (!value)
937 return config_error_nonbool(var);
938 else if (!strcmp(value, "never"))
939 autorebase = AUTOREBASE_NEVER;
940 else if (!strcmp(value, "local"))
941 autorebase = AUTOREBASE_LOCAL;
942 else if (!strcmp(value, "remote"))
943 autorebase = AUTOREBASE_REMOTE;
944 else if (!strcmp(value, "always"))
945 autorebase = AUTOREBASE_ALWAYS;
946 else
947 return error("Malformed value for %s", var);
948 return 0;
949 }
a9cc857a 950
1ab661dd 951 /* Add other config variables here and to Documentation/config.txt. */
17712991
LT
952 return 0;
953}
954
52153747
FAG
955static int git_default_push_config(const char *var, const char *value)
956{
957 if (!strcmp(var, "push.default")) {
958 if (!value)
959 return config_error_nonbool(var);
960 else if (!strcmp(value, "nothing"))
961 push_default = PUSH_DEFAULT_NOTHING;
962 else if (!strcmp(value, "matching"))
963 push_default = PUSH_DEFAULT_MATCHING;
b55e6775
MM
964 else if (!strcmp(value, "simple"))
965 push_default = PUSH_DEFAULT_SIMPLE;
53c40311
JH
966 else if (!strcmp(value, "upstream"))
967 push_default = PUSH_DEFAULT_UPSTREAM;
968 else if (!strcmp(value, "tracking")) /* deprecated */
969 push_default = PUSH_DEFAULT_UPSTREAM;
52153747
FAG
970 else if (!strcmp(value, "current"))
971 push_default = PUSH_DEFAULT_CURRENT;
972 else {
973 error("Malformed value for %s: %s", var, value);
b55e6775
MM
974 return error("Must be one of nothing, matching, simple, "
975 "upstream or current.");
52153747
FAG
976 }
977 return 0;
978 }
979
980 /* Add other config variables here and to Documentation/config.txt. */
981 return 0;
982}
983
d551a488
MSO
984static int git_default_mailmap_config(const char *var, const char *value)
985{
986 if (!strcmp(var, "mailmap.file"))
9352fd57 987 return git_config_pathname(&git_mailmap_file, var, value);
08610900
JK
988 if (!strcmp(var, "mailmap.blob"))
989 return git_config_string(&git_mailmap_blob, var, value);
d551a488
MSO
990
991 /* Add other config variables here and to Documentation/config.txt. */
992 return 0;
993}
994
1141f492
LT
995int git_default_config(const char *var, const char *value, void *dummy)
996{
59556548 997 if (starts_with(var, "core."))
1141f492
LT
998 return git_default_core_config(var, value);
999
59556548 1000 if (starts_with(var, "user."))
9597921b 1001 return git_ident_config(var, value, dummy);
1141f492 1002
59556548 1003 if (starts_with(var, "i18n."))
1141f492
LT
1004 return git_default_i18n_config(var, value);
1005
59556548 1006 if (starts_with(var, "branch."))
1141f492
LT
1007 return git_default_branch_config(var, value);
1008
59556548 1009 if (starts_with(var, "push."))
52153747
FAG
1010 return git_default_push_config(var, value);
1011
59556548 1012 if (starts_with(var, "mailmap."))
d551a488
MSO
1013 return git_default_mailmap_config(var, value);
1014
59556548 1015 if (starts_with(var, "advice."))
75194438
JK
1016 return git_default_advice_config(var, value);
1017
1141f492
LT
1018 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
1019 pager_use_color = git_config_bool(var,value);
1020 return 0;
1021 }
1022
568508e7
JH
1023 if (!strcmp(var, "pack.packsizelimit")) {
1024 pack_size_limit_cfg = git_config_ulong(var, value);
1025 return 0;
1026 }
1141f492
LT
1027 /* Add other config variables here and to Documentation/config.txt. */
1028 return 0;
1029}
1030
ca4b5de2 1031/*
b2dc0945 1032 * All source specific fields in the union, die_on_error, name and the callbacks
4d8dd149 1033 * fgetc, ungetc, ftell of top need to be initialized before calling
ca4b5de2
HV
1034 * this function.
1035 */
4d8dd149 1036static int do_config_from(struct config_source *top, config_fn_t fn, void *data)
ca4b5de2
HV
1037{
1038 int ret;
1039
1040 /* push config-file parsing state stack */
1041 top->prev = cf;
1042 top->linenr = 1;
1043 top->eof = 0;
1044 strbuf_init(&top->value, 1024);
1045 strbuf_init(&top->var, 1024);
1046 cf = top;
1047
4d8dd149 1048 ret = git_parse_source(fn, data);
ca4b5de2
HV
1049
1050 /* pop config-file parsing state stack */
1051 strbuf_release(&top->value);
1052 strbuf_release(&top->var);
1053 cf = top->prev;
1054
1055 return ret;
1056}
1057
3caec73b
KS
1058static int do_config_from_file(config_fn_t fn,
1059 const char *name, const char *path, FILE *f, void *data)
17712991 1060{
3caec73b 1061 struct config_source top;
17712991 1062
3caec73b
KS
1063 top.u.file = f;
1064 top.name = name;
1065 top.path = path;
1066 top.die_on_error = 1;
1067 top.do_fgetc = config_file_fgetc;
1068 top.do_ungetc = config_file_ungetc;
1069 top.do_ftell = config_file_ftell;
924aaf3e 1070
3caec73b
KS
1071 return do_config_from(&top, fn, data);
1072}
924aaf3e 1073
3caec73b
KS
1074static int git_config_from_stdin(config_fn_t fn, void *data)
1075{
1076 return do_config_from_file(fn, "<stdin>", NULL, stdin, data);
1077}
1078
1079int git_config_from_file(config_fn_t fn, const char *filename, void *data)
1080{
1081 int ret = -1;
1082 FILE *f;
924aaf3e 1083
3caec73b
KS
1084 f = fopen(filename, "r");
1085 if (f) {
1086 ret = do_config_from_file(fn, filename, filename, f, data);
17712991
LT
1087 fclose(f);
1088 }
1089 return ret;
1090}
10bea152 1091
1bc88819
HV
1092int git_config_from_buf(config_fn_t fn, const char *name, const char *buf,
1093 size_t len, void *data)
1094{
1095 struct config_source top;
1096
1097 top.u.buf.buf = buf;
1098 top.u.buf.len = len;
1099 top.u.buf.pos = 0;
1100 top.name = name;
d14d4244 1101 top.path = NULL;
b2dc0945 1102 top.die_on_error = 0;
49d6cfa5
JK
1103 top.do_fgetc = config_buf_fgetc;
1104 top.do_ungetc = config_buf_ungetc;
1105 top.do_ftell = config_buf_ftell;
1bc88819
HV
1106
1107 return do_config_from(&top, fn, data);
1108}
1109
1110static int git_config_from_blob_sha1(config_fn_t fn,
1111 const char *name,
1112 const unsigned char *sha1,
1113 void *data)
1114{
1115 enum object_type type;
1116 char *buf;
1117 unsigned long size;
1118 int ret;
1119
1120 buf = read_sha1_file(sha1, &type, &size);
1121 if (!buf)
1122 return error("unable to load config blob object '%s'", name);
1123 if (type != OBJ_BLOB) {
1124 free(buf);
1125 return error("reference '%s' does not point to a blob", name);
1126 }
1127
1128 ret = git_config_from_buf(fn, name, buf, size, data);
1129 free(buf);
1130
1131 return ret;
1132}
1133
1134static int git_config_from_blob_ref(config_fn_t fn,
1135 const char *name,
1136 void *data)
1137{
1138 unsigned char sha1[20];
1139
1140 if (get_sha1(name, sha1) < 0)
1141 return error("unable to resolve config blob '%s'", name);
1142 return git_config_from_blob_sha1(fn, name, sha1, data);
1143}
1144
506b17b1
JS
1145const char *git_etc_gitconfig(void)
1146{
7f0e39fa 1147 static const char *system_wide;
2de9de5e
SP
1148 if (!system_wide)
1149 system_wide = system_path(ETC_GITCONFIG);
7f0e39fa 1150 return system_wide;
506b17b1
JS
1151}
1152
23b0c478
SP
1153/*
1154 * Parse environment variable 'k' as a boolean (in various
1155 * possible spellings); if missing, use the default value 'def'.
1156 */
0ef37164 1157int git_env_bool(const char *k, int def)
ab88c363
JK
1158{
1159 const char *v = getenv(k);
1160 return v ? git_config_bool(k, v) : def;
1161}
1162
23b0c478
SP
1163/*
1164 * Parse environment variable 'k' as ulong with possibly a unit
1165 * suffix; if missing, use the default value 'val'.
1166 */
1167unsigned long git_env_ulong(const char *k, unsigned long val)
1168{
1169 const char *v = getenv(k);
1170 if (v && !git_parse_ulong(v, &val))
1171 die("failed to parse %s", k);
1172 return val;
1173}
1174
ab88c363
JK
1175int git_config_system(void)
1176{
1177 return !git_env_bool("GIT_CONFIG_NOSYSTEM", 0);
1178}
1179
dbdf5854 1180int git_config_early(config_fn_t fn, void *data, const char *repo_config)
4f629539 1181{
aa387407 1182 int ret = 0, found = 0;
21cf3227
HKNN
1183 char *xdg_config = NULL;
1184 char *user_config = NULL;
1185
1186 home_config_paths(&user_config, &xdg_config, "config");
5f1a63e0 1187
4698c8fe 1188 if (git_config_system() && !access_or_die(git_etc_gitconfig(), R_OK, 0)) {
dc871831
DB
1189 ret += git_config_from_file(fn, git_etc_gitconfig(),
1190 data);
aa387407
FC
1191 found += 1;
1192 }
5f1a63e0 1193
4698c8fe 1194 if (xdg_config && !access_or_die(xdg_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1195 ret += git_config_from_file(fn, xdg_config, data);
1196 found += 1;
1197 }
1198
4698c8fe 1199 if (user_config && !access_or_die(user_config, R_OK, ACCESS_EACCES_OK)) {
21cf3227
HKNN
1200 ret += git_config_from_file(fn, user_config, data);
1201 found += 1;
5f1a63e0
JS
1202 }
1203
4698c8fe 1204 if (repo_config && !access_or_die(repo_config, R_OK, 0)) {
aa387407
FC
1205 ret += git_config_from_file(fn, repo_config, data);
1206 found += 1;
1207 }
8b1fa778 1208
5a0c9eeb
JK
1209 switch (git_config_from_parameters(fn, data)) {
1210 case -1: /* error */
8262aaa2 1211 die(_("unable to parse command-line config"));
5a0c9eeb
JK
1212 break;
1213 case 0: /* found nothing */
1214 break;
1215 default: /* found at least one item */
1216 found++;
1217 break;
1218 }
8b1fa778 1219
21cf3227
HKNN
1220 free(xdg_config);
1221 free(user_config);
1f2baa78 1222 return ret == 0 ? found : ret;
4f629539
JH
1223}
1224
c9b5e2a5 1225int git_config_with_options(config_fn_t fn, void *data,
c8985ce0 1226 struct git_config_source *config_source,
1bc88819 1227 int respect_includes)
dbdf5854
NTND
1228{
1229 char *repo_config = NULL;
1230 int ret;
9b25a0b5
JK
1231 struct config_include_data inc = CONFIG_INCLUDE_INIT;
1232
1233 if (respect_includes) {
1234 inc.fn = fn;
1235 inc.data = data;
1236 fn = git_config_include;
1237 data = &inc;
1238 }
dbdf5854 1239
c9b5e2a5
JK
1240 /*
1241 * If we have a specific filename, use it. Otherwise, follow the
1242 * regular lookup sequence.
1243 */
3caec73b
KS
1244 if (config_source && config_source->use_stdin)
1245 return git_config_from_stdin(fn, data);
1246 else if (config_source && config_source->file)
c8985ce0
KS
1247 return git_config_from_file(fn, config_source->file, data);
1248 else if (config_source && config_source->blob)
1249 return git_config_from_blob_ref(fn, config_source->blob, data);
c9b5e2a5 1250
dbdf5854
NTND
1251 repo_config = git_pathdup("config");
1252 ret = git_config_early(fn, data, repo_config);
1253 if (repo_config)
1254 free(repo_config);
1255 return ret;
1256}
1257
155ef25f 1258static void git_config_raw(config_fn_t fn, void *data)
c9b5e2a5 1259{
aace4385
TA
1260 if (git_config_with_options(fn, data, NULL, 1) < 0)
1261 /*
1262 * git_config_with_options() normally returns only
1263 * positive values, as most errors are fatal, and
1264 * non-fatal potential errors are guarded by "if"
1265 * statements that are entered only when no error is
1266 * possible.
1267 *
1268 * If we ever encounter a non-fatal error, it means
1269 * something went really wrong and we should stop
1270 * immediately.
1271 */
1272 die(_("unknown error occured while reading the configuration files"));
c9b5e2a5
JK
1273}
1274
155ef25f 1275static void configset_iter(struct config_set *cs, config_fn_t fn, void *data)
c9b5e2a5 1276{
155ef25f
TA
1277 int i, value_index;
1278 struct string_list *values;
1279 struct config_set_element *entry;
1280 struct configset_list *list = &cs->list;
1281 struct key_value_info *kv_info;
1282
1283 for (i = 0; i < list->nr; i++) {
1284 entry = list->items[i].e;
1285 value_index = list->items[i].value_index;
1286 values = &entry->value_list;
1287 if (fn(entry->key, values->items[value_index].string, data) < 0) {
1288 kv_info = values->items[value_index].util;
1289 git_die_config_linenr(entry->key, kv_info->filename, kv_info->linenr);
1290 }
1291 }
1292}
1293
1294static void git_config_check_init(void);
1295
1296void git_config(config_fn_t fn, void *data)
1297{
1298 git_config_check_init();
1299 configset_iter(&the_config_set, fn, data);
c9b5e2a5
JK
1300}
1301
3c8687a7
TA
1302static struct config_set_element *configset_find_element(struct config_set *cs, const char *key)
1303{
1304 struct config_set_element k;
1305 struct config_set_element *found_entry;
1306 char *normalized_key;
1307 int ret;
1308 /*
1309 * `key` may come from the user, so normalize it before using it
1310 * for querying entries from the hashmap.
1311 */
1312 ret = git_config_parse_key(key, &normalized_key, NULL);
1313
1314 if (ret)
1315 return NULL;
1316
1317 hashmap_entry_init(&k, strhash(normalized_key));
1318 k.key = normalized_key;
1319 found_entry = hashmap_get(&cs->config_hash, &k, NULL);
1320 free(normalized_key);
1321 return found_entry;
1322}
1323
1324static int configset_add_value(struct config_set *cs, const char *key, const char *value)
1325{
1326 struct config_set_element *e;
3df8fd62 1327 struct string_list_item *si;
155ef25f 1328 struct configset_list_item *l_item;
3df8fd62
TA
1329 struct key_value_info *kv_info = xmalloc(sizeof(*kv_info));
1330
3c8687a7
TA
1331 e = configset_find_element(cs, key);
1332 /*
1333 * Since the keys are being fed by git_config*() callback mechanism, they
1334 * are already normalized. So simply add them without any further munging.
1335 */
1336 if (!e) {
1337 e = xmalloc(sizeof(*e));
1338 hashmap_entry_init(e, strhash(key));
1339 e->key = xstrdup(key);
1340 string_list_init(&e->value_list, 1);
1341 hashmap_add(&cs->config_hash, e);
1342 }
3df8fd62 1343 si = string_list_append_nodup(&e->value_list, value ? xstrdup(value) : NULL);
155ef25f
TA
1344
1345 ALLOC_GROW(cs->list.items, cs->list.nr + 1, cs->list.alloc);
1346 l_item = &cs->list.items[cs->list.nr++];
1347 l_item->e = e;
1348 l_item->value_index = e->value_list.nr - 1;
1349
3df8fd62
TA
1350 if (cf) {
1351 kv_info->filename = strintern(cf->name);
1352 kv_info->linenr = cf->linenr;
1353 } else {
1354 /* for values read from `git_config_from_parameters()` */
1355 kv_info->filename = NULL;
1356 kv_info->linenr = -1;
1357 }
1358 si->util = kv_info;
3c8687a7
TA
1359
1360 return 0;
1361}
1362
1363static int config_set_element_cmp(const struct config_set_element *e1,
1364 const struct config_set_element *e2, const void *unused)
1365{
1366 return strcmp(e1->key, e2->key);
1367}
1368
1369void git_configset_init(struct config_set *cs)
1370{
1371 hashmap_init(&cs->config_hash, (hashmap_cmp_fn)config_set_element_cmp, 0);
1372 cs->hash_initialized = 1;
155ef25f
TA
1373 cs->list.nr = 0;
1374 cs->list.alloc = 0;
1375 cs->list.items = NULL;
3c8687a7
TA
1376}
1377
1378void git_configset_clear(struct config_set *cs)
1379{
1380 struct config_set_element *entry;
1381 struct hashmap_iter iter;
1382 if (!cs->hash_initialized)
1383 return;
1384
1385 hashmap_iter_init(&cs->config_hash, &iter);
1386 while ((entry = hashmap_iter_next(&iter))) {
1387 free(entry->key);
3df8fd62 1388 string_list_clear(&entry->value_list, 1);
3c8687a7
TA
1389 }
1390 hashmap_free(&cs->config_hash, 1);
1391 cs->hash_initialized = 0;
155ef25f
TA
1392 free(cs->list.items);
1393 cs->list.nr = 0;
1394 cs->list.alloc = 0;
1395 cs->list.items = NULL;
3c8687a7
TA
1396}
1397
1398static int config_set_callback(const char *key, const char *value, void *cb)
1399{
1400 struct config_set *cs = cb;
1401 configset_add_value(cs, key, value);
1402 return 0;
1403}
1404
1405int git_configset_add_file(struct config_set *cs, const char *filename)
1406{
1407 return git_config_from_file(config_set_callback, filename, cs);
1408}
1409
1410int git_configset_get_value(struct config_set *cs, const char *key, const char **value)
1411{
1412 const struct string_list *values = NULL;
1413 /*
1414 * Follows "last one wins" semantic, i.e., if there are multiple matches for the
1415 * queried key in the files of the configset, the value returned will be the last
1416 * value in the value list for that key.
1417 */
1418 values = git_configset_get_value_multi(cs, key);
1419
1420 if (!values)
1421 return 1;
1422 assert(values->nr > 0);
1423 *value = values->items[values->nr - 1].string;
1424 return 0;
1425}
1426
1427const struct string_list *git_configset_get_value_multi(struct config_set *cs, const char *key)
1428{
1429 struct config_set_element *e = configset_find_element(cs, key);
1430 return e ? &e->value_list : NULL;
1431}
1432
1433int git_configset_get_string_const(struct config_set *cs, const char *key, const char **dest)
1434{
1435 const char *value;
1436 if (!git_configset_get_value(cs, key, &value))
1437 return git_config_string(dest, key, value);
1438 else
1439 return 1;
1440}
1441
1442int git_configset_get_string(struct config_set *cs, const char *key, char **dest)
1443{
1444 return git_configset_get_string_const(cs, key, (const char **)dest);
1445}
1446
1447int git_configset_get_int(struct config_set *cs, const char *key, int *dest)
1448{
1449 const char *value;
1450 if (!git_configset_get_value(cs, key, &value)) {
1451 *dest = git_config_int(key, value);
1452 return 0;
1453 } else
1454 return 1;
1455}
1456
1457int git_configset_get_ulong(struct config_set *cs, const char *key, unsigned long *dest)
1458{
1459 const char *value;
1460 if (!git_configset_get_value(cs, key, &value)) {
1461 *dest = git_config_ulong(key, value);
1462 return 0;
1463 } else
1464 return 1;
1465}
1466
1467int git_configset_get_bool(struct config_set *cs, const char *key, int *dest)
1468{
1469 const char *value;
1470 if (!git_configset_get_value(cs, key, &value)) {
1471 *dest = git_config_bool(key, value);
1472 return 0;
1473 } else
1474 return 1;
1475}
1476
1477int git_configset_get_bool_or_int(struct config_set *cs, const char *key,
1478 int *is_bool, int *dest)
1479{
1480 const char *value;
1481 if (!git_configset_get_value(cs, key, &value)) {
1482 *dest = git_config_bool_or_int(key, value, is_bool);
1483 return 0;
1484 } else
1485 return 1;
1486}
1487
1488int git_configset_get_maybe_bool(struct config_set *cs, const char *key, int *dest)
1489{
1490 const char *value;
1491 if (!git_configset_get_value(cs, key, &value)) {
1492 *dest = git_config_maybe_bool(key, value);
1493 if (*dest == -1)
1494 return -1;
1495 return 0;
1496 } else
1497 return 1;
1498}
1499
1500int git_configset_get_pathname(struct config_set *cs, const char *key, const char **dest)
1501{
1502 const char *value;
1503 if (!git_configset_get_value(cs, key, &value))
1504 return git_config_pathname(dest, key, value);
1505 else
1506 return 1;
1507}
1508
1509static void git_config_check_init(void)
1510{
1511 if (the_config_set.hash_initialized)
1512 return;
1513 git_configset_init(&the_config_set);
155ef25f 1514 git_config_raw(config_set_callback, &the_config_set);
3c8687a7
TA
1515}
1516
1517void git_config_clear(void)
1518{
1519 if (!the_config_set.hash_initialized)
1520 return;
1521 git_configset_clear(&the_config_set);
1522}
1523
1524int git_config_get_value(const char *key, const char **value)
1525{
1526 git_config_check_init();
1527 return git_configset_get_value(&the_config_set, key, value);
1528}
1529
1530const struct string_list *git_config_get_value_multi(const char *key)
1531{
1532 git_config_check_init();
1533 return git_configset_get_value_multi(&the_config_set, key);
1534}
1535
1536int git_config_get_string_const(const char *key, const char **dest)
1537{
5a80e97c 1538 int ret;
3c8687a7 1539 git_config_check_init();
5a80e97c
TA
1540 ret = git_configset_get_string_const(&the_config_set, key, dest);
1541 if (ret < 0)
1542 git_die_config(key, NULL);
1543 return ret;
3c8687a7
TA
1544}
1545
1546int git_config_get_string(const char *key, char **dest)
1547{
1548 git_config_check_init();
1549 return git_config_get_string_const(key, (const char **)dest);
1550}
1551
1552int git_config_get_int(const char *key, int *dest)
1553{
1554 git_config_check_init();
1555 return git_configset_get_int(&the_config_set, key, dest);
1556}
1557
1558int git_config_get_ulong(const char *key, unsigned long *dest)
1559{
1560 git_config_check_init();
1561 return git_configset_get_ulong(&the_config_set, key, dest);
1562}
1563
1564int git_config_get_bool(const char *key, int *dest)
1565{
1566 git_config_check_init();
1567 return git_configset_get_bool(&the_config_set, key, dest);
1568}
1569
1570int git_config_get_bool_or_int(const char *key, int *is_bool, int *dest)
1571{
1572 git_config_check_init();
1573 return git_configset_get_bool_or_int(&the_config_set, key, is_bool, dest);
1574}
1575
1576int git_config_get_maybe_bool(const char *key, int *dest)
1577{
1578 git_config_check_init();
1579 return git_configset_get_maybe_bool(&the_config_set, key, dest);
1580}
1581
1582int git_config_get_pathname(const char *key, const char **dest)
1583{
5a80e97c 1584 int ret;
3c8687a7 1585 git_config_check_init();
5a80e97c
TA
1586 ret = git_configset_get_pathname(&the_config_set, key, dest);
1587 if (ret < 0)
1588 git_die_config(key, NULL);
1589 return ret;
1590}
1591
1592NORETURN
1593void git_die_config_linenr(const char *key, const char *filename, int linenr)
1594{
1595 if (!filename)
1596 die(_("unable to parse '%s' from command-line config"), key);
1597 else
1598 die(_("bad config variable '%s' in file '%s' at line %d"),
1599 key, filename, linenr);
1600}
1601
1602NORETURN __attribute__((format(printf, 2, 3)))
1603void git_die_config(const char *key, const char *err, ...)
1604{
1605 const struct string_list *values;
1606 struct key_value_info *kv_info;
1607
1608 if (err) {
1609 va_list params;
1610 va_start(params, err);
1611 vreportf("error: ", err, params);
1612 va_end(params);
1613 }
1614 values = git_config_get_value_multi(key);
1615 kv_info = values->items[values->nr - 1].util;
1616 git_die_config_linenr(key, kv_info->filename, kv_info->linenr);
3c8687a7
TA
1617}
1618
10bea152
JS
1619/*
1620 * Find all the stuff for git_config_set() below.
1621 */
4ddba79d 1622
10bea152
JS
1623static struct {
1624 int baselen;
4b25d091 1625 char *key;
f98d863d 1626 int do_not_match;
4b25d091 1627 regex_t *value_regex;
4ddba79d 1628 int multi_replace;
83786fa4
TR
1629 size_t *offset;
1630 unsigned int offset_alloc;
10bea152
JS
1631 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
1632 int seen;
1633} store;
1634
4b25d091 1635static int matches(const char *key, const char *value)
f98d863d 1636{
c1063be2
JK
1637 if (strcmp(key, store.key))
1638 return 0; /* not ours */
1639 if (!store.value_regex)
1640 return 1; /* always matches */
1641 if (store.value_regex == CONFIG_REGEX_NONE)
1642 return 0; /* never matches */
1643
1644 return store.do_not_match ^
1645 (value && !regexec(store.value_regex, value, 0, NULL, 0));
f98d863d
JS
1646}
1647
4b25d091 1648static int store_aux(const char *key, const char *value, void *cb)
10bea152 1649{
ae9ee41d
JH
1650 const char *ep;
1651 size_t section_len;
1652
10bea152
JS
1653 switch (store.state) {
1654 case KEY_SEEN:
f98d863d 1655 if (matches(key, value)) {
4ddba79d 1656 if (store.seen == 1 && store.multi_replace == 0) {
8262aaa2 1657 warning(_("%s has multiple values"), key);
10bea152 1658 }
4ddba79d 1659
83786fa4
TR
1660 ALLOC_GROW(store.offset, store.seen + 1,
1661 store.offset_alloc);
1662
49d6cfa5 1663 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1664 store.seen++;
1665 }
1666 break;
1667 case SECTION_SEEN:
ae9ee41d
JH
1668 /*
1669 * What we are looking for is in store.key (both
1670 * section and var), and its section part is baselen
1671 * long. We found key (again, both section and var).
1672 * We would want to know if this key is in the same
1673 * section as what we are looking for. We already
1674 * know we are in the same section as what should
1675 * hold store.key.
1676 */
1677 ep = strrchr(key, '.');
1678 section_len = ep - key;
1679
1680 if ((section_len != store.baselen) ||
1681 memcmp(key, store.key, section_len+1)) {
10bea152
JS
1682 store.state = SECTION_END_SEEN;
1683 break;
ae9ee41d
JH
1684 }
1685
1686 /*
1687 * Do not increment matches: this is no match, but we
1688 * just made sure we are in the desired section.
1689 */
83786fa4
TR
1690 ALLOC_GROW(store.offset, store.seen + 1,
1691 store.offset_alloc);
49d6cfa5 1692 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1693 /* fallthru */
1694 case SECTION_END_SEEN:
1695 case START:
f98d863d 1696 if (matches(key, value)) {
83786fa4
TR
1697 ALLOC_GROW(store.offset, store.seen + 1,
1698 store.offset_alloc);
49d6cfa5 1699 store.offset[store.seen] = cf->do_ftell(cf);
10bea152
JS
1700 store.state = KEY_SEEN;
1701 store.seen++;
d14f7764
LT
1702 } else {
1703 if (strrchr(key, '.') - key == store.baselen &&
bdf0ef08 1704 !strncmp(key, store.key, store.baselen)) {
93ddef3e 1705 store.state = SECTION_SEEN;
83786fa4
TR
1706 ALLOC_GROW(store.offset,
1707 store.seen + 1,
1708 store.offset_alloc);
49d6cfa5 1709 store.offset[store.seen] = cf->do_ftell(cf);
d14f7764 1710 }
bdf0ef08 1711 }
10bea152
JS
1712 }
1713 return 0;
1714}
1715
64c0d71c 1716static int write_error(const char *filename)
480c9e52 1717{
64c0d71c 1718 error("failed to write new configuration file %s", filename);
480c9e52
AW
1719
1720 /* Same error code as "failed to rename". */
1721 return 4;
1722}
1723
4b25d091 1724static int store_write_section(int fd, const char *key)
10bea152 1725{
cb891a59
KH
1726 const char *dot;
1727 int i, success;
f285a2d7 1728 struct strbuf sb = STRBUF_INIT;
d14f7764 1729
cb891a59 1730 dot = memchr(key, '.', store.baselen);
d14f7764 1731 if (dot) {
cb891a59
KH
1732 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
1733 for (i = dot - key + 1; i < store.baselen; i++) {
e5c349ba 1734 if (key[i] == '"' || key[i] == '\\')
cb891a59
KH
1735 strbuf_addch(&sb, '\\');
1736 strbuf_addch(&sb, key[i]);
d14f7764 1737 }
cb891a59
KH
1738 strbuf_addstr(&sb, "\"]\n");
1739 } else {
1740 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
d14f7764
LT
1741 }
1742
cb891a59
KH
1743 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1744 strbuf_release(&sb);
480c9e52 1745
cb891a59 1746 return success;
10bea152
JS
1747}
1748
4b25d091 1749static int store_write_pair(int fd, const char *key, const char *value)
10bea152 1750{
cb891a59
KH
1751 int i, success;
1752 int length = strlen(key + store.baselen + 1);
1753 const char *quote = "";
f285a2d7 1754 struct strbuf sb = STRBUF_INIT;
cdd4fb15 1755
6281f394
JM
1756 /*
1757 * Check to see if the value needs to be surrounded with a dq pair.
1758 * Note that problematic characters are always backslash-quoted; this
1759 * check is about not losing leading or trailing SP and strings that
1760 * follow beginning-of-comment characters (i.e. ';' and '#') by the
1761 * configuration parser.
1762 */
cdd4fb15 1763 if (value[0] == ' ')
cb891a59 1764 quote = "\"";
cdd4fb15
BG
1765 for (i = 0; value[i]; i++)
1766 if (value[i] == ';' || value[i] == '#')
cb891a59
KH
1767 quote = "\"";
1768 if (i && value[i - 1] == ' ')
1769 quote = "\"";
1770
cb891a59
KH
1771 strbuf_addf(&sb, "\t%.*s = %s",
1772 length, key + store.baselen + 1, quote);
10bea152 1773
10bea152
JS
1774 for (i = 0; value[i]; i++)
1775 switch (value[i]) {
480c9e52 1776 case '\n':
cb891a59 1777 strbuf_addstr(&sb, "\\n");
480c9e52
AW
1778 break;
1779 case '\t':
cb891a59 1780 strbuf_addstr(&sb, "\\t");
480c9e52
AW
1781 break;
1782 case '"':
1783 case '\\':
cb891a59 1784 strbuf_addch(&sb, '\\');
480c9e52 1785 default:
cb891a59 1786 strbuf_addch(&sb, value[i]);
480c9e52
AW
1787 break;
1788 }
cb891a59
KH
1789 strbuf_addf(&sb, "%s\n", quote);
1790
1791 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
1792 strbuf_release(&sb);
1793
1794 return success;
10bea152
JS
1795}
1796
4b25d091
FC
1797static ssize_t find_beginning_of_line(const char *contents, size_t size,
1798 size_t offset_, int *found_bracket)
4ddba79d 1799{
dc49cd76
SP
1800 size_t equal_offset = size, bracket_offset = size;
1801 ssize_t offset;
4ddba79d 1802
7a31cc0f 1803contline:
a6080a0a 1804 for (offset = offset_-2; offset > 0
4ddba79d
JS
1805 && contents[offset] != '\n'; offset--)
1806 switch (contents[offset]) {
1807 case '=': equal_offset = offset; break;
1808 case ']': bracket_offset = offset; break;
1809 }
7a31cc0f
FL
1810 if (offset > 0 && contents[offset-1] == '\\') {
1811 offset_ = offset;
1812 goto contline;
1813 }
4ddba79d
JS
1814 if (bracket_offset < equal_offset) {
1815 *found_bracket = 1;
1816 offset = bracket_offset+1;
1817 } else
1818 offset++;
1819
1820 return offset;
1821}
1822
5ec31182
RR
1823int git_config_set_in_file(const char *config_filename,
1824 const char *key, const char *value)
1825{
1826 return git_config_set_multivar_in_file(config_filename, key, value, NULL, 0);
1827}
1828
4b25d091 1829int git_config_set(const char *key, const char *value)
10bea152 1830{
4ddba79d 1831 return git_config_set_multivar(key, value, NULL, 0);
10bea152
JS
1832}
1833
b09c53a3
LP
1834/*
1835 * Auxiliary function to sanity-check and split the key into the section
1836 * identifier and variable name.
1837 *
1838 * Returns 0 on success, -1 when there is an invalid character in the key and
1839 * -2 if there is no section name in the key.
1840 *
1841 * store_key - pointer to char* which will hold a copy of the key with
1842 * lowercase section and variable name
1843 * baselen - pointer to int which will hold the length of the
1844 * section + subsection part, can be NULL
1845 */
1846int git_config_parse_key(const char *key, char **store_key, int *baselen_)
1847{
1848 int i, dot, baselen;
1849 const char *last_dot = strrchr(key, '.');
1850
1851 /*
1852 * Since "key" actually contains the section name and the real
1853 * key name separated by a dot, we have to know where the dot is.
1854 */
1855
2169ddc0 1856 if (last_dot == NULL || last_dot == key) {
b09c53a3 1857 error("key does not contain a section: %s", key);
7a397419 1858 return -CONFIG_NO_SECTION_OR_NAME;
b09c53a3
LP
1859 }
1860
2169ddc0
LP
1861 if (!last_dot[1]) {
1862 error("key does not contain variable name: %s", key);
7a397419 1863 return -CONFIG_NO_SECTION_OR_NAME;
2169ddc0
LP
1864 }
1865
b09c53a3
LP
1866 baselen = last_dot - key;
1867 if (baselen_)
1868 *baselen_ = baselen;
1869
1870 /*
1871 * Validate the key and while at it, lower case it for matching.
1872 */
1873 *store_key = xmalloc(strlen(key) + 1);
1874
1875 dot = 0;
1876 for (i = 0; key[i]; i++) {
1877 unsigned char c = key[i];
1878 if (c == '.')
1879 dot = 1;
1880 /* Leave the extended basename untouched.. */
1881 if (!dot || i > baselen) {
1882 if (!iskeychar(c) ||
1883 (i == baselen + 1 && !isalpha(c))) {
1884 error("invalid key: %s", key);
1885 goto out_free_ret_1;
1886 }
1887 c = tolower(c);
1888 } else if (c == '\n') {
1889 error("invalid key (newline): %s", key);
1890 goto out_free_ret_1;
1891 }
1892 (*store_key)[i] = c;
1893 }
1894 (*store_key)[i] = 0;
1895
1896 return 0;
1897
1898out_free_ret_1:
1899 free(*store_key);
97ed50f9 1900 *store_key = NULL;
7a397419 1901 return -CONFIG_INVALID_KEY;
b09c53a3
LP
1902}
1903
10bea152
JS
1904/*
1905 * If value==NULL, unset in (remove from) config,
1906 * if value_regex!=NULL, disregard key/value pairs where value does not match.
c1063be2
JK
1907 * if value_regex==CONFIG_REGEX_NONE, do not match any existing values
1908 * (only add a new one)
4ddba79d
JS
1909 * if multi_replace==0, nothing, or only one matching key/value is replaced,
1910 * else all matching key/values (regardless how many) are removed,
1911 * before the new pair is written.
10bea152
JS
1912 *
1913 * Returns 0 on success.
1914 *
1915 * This function does this:
1916 *
1917 * - it locks the config file by creating ".git/config.lock"
1918 *
1919 * - it then parses the config using store_aux() as validator to find
1920 * the position on the key/value pair to replace. If it is to be unset,
1921 * it must be found exactly once.
1922 *
1923 * - the config file is mmap()ed and the part before the match (if any) is
1924 * written to the lock file, then the changed part and the rest.
1925 *
1926 * - the config file is removed and the lock file rename()d to it.
1927 *
1928 */
5ec31182
RR
1929int git_config_set_multivar_in_file(const char *config_filename,
1930 const char *key, const char *value,
1931 const char *value_regex, int multi_replace)
10bea152 1932{
f8ba655e 1933 int fd = -1, in_fd;
dafc88b1 1934 int ret;
6cbf973c 1935 struct lock_file *lock = NULL;
0a5f5759 1936 char *filename_buf = NULL;
3a1b3126
JK
1937 char *contents = NULL;
1938 size_t contents_sz;
4ddba79d 1939
b09c53a3
LP
1940 /* parse-key returns negative; flip the sign to feed exit(3) */
1941 ret = 0 - git_config_parse_key(key, &store.key, &store.baselen);
1942 if (ret)
dafc88b1 1943 goto out_free;
b17e659d
JS
1944
1945 store.multi_replace = multi_replace;
10bea152 1946
0a5f5759
JK
1947 if (!config_filename)
1948 config_filename = filename_buf = git_pathdup("config");
10bea152
JS
1949
1950 /*
6cbf973c 1951 * The lock serves a purpose in addition to locking: the new
10bea152
JS
1952 * contents of .git/config will be written into it.
1953 */
f1064f6b 1954 lock = xcalloc(1, sizeof(struct lock_file));
6cbf973c
BS
1955 fd = hold_lock_file_for_update(lock, config_filename, 0);
1956 if (fd < 0) {
6ffd567b 1957 error("could not lock config file %s: %s", config_filename, strerror(errno));
10bea152 1958 free(store.key);
7a397419 1959 ret = CONFIG_NO_LOCK;
dafc88b1 1960 goto out_free;
10bea152
JS
1961 }
1962
1963 /*
1964 * If .git/config does not exist yet, write a minimal version.
1965 */
88fb958b
AR
1966 in_fd = open(config_filename, O_RDONLY);
1967 if ( in_fd < 0 ) {
10bea152
JS
1968 free(store.key);
1969
88fb958b
AR
1970 if ( ENOENT != errno ) {
1971 error("opening %s: %s", config_filename,
1972 strerror(errno));
7a397419 1973 ret = CONFIG_INVALID_FILE; /* same as "invalid config file" */
dafc88b1 1974 goto out_free;
88fb958b 1975 }
10bea152
JS
1976 /* if nothing to unset, error out */
1977 if (value == NULL) {
7a397419 1978 ret = CONFIG_NOTHING_SET;
dafc88b1 1979 goto out_free;
10bea152
JS
1980 }
1981
4b25d091 1982 store.key = (char *)key;
480c9e52 1983 if (!store_write_section(fd, key) ||
93c1e079
JH
1984 !store_write_pair(fd, key, value))
1985 goto write_err_out;
1986 } else {
88fb958b 1987 struct stat st;
3a1b3126 1988 size_t copy_begin, copy_end;
dc49cd76 1989 int i, new_line = 0;
10bea152
JS
1990
1991 if (value_regex == NULL)
1992 store.value_regex = NULL;
c1063be2
JK
1993 else if (value_regex == CONFIG_REGEX_NONE)
1994 store.value_regex = CONFIG_REGEX_NONE;
10bea152 1995 else {
f98d863d
JS
1996 if (value_regex[0] == '!') {
1997 store.do_not_match = 1;
1998 value_regex++;
1999 } else
2000 store.do_not_match = 0;
2001
2d7320d0 2002 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
10bea152
JS
2003 if (regcomp(store.value_regex, value_regex,
2004 REG_EXTENDED)) {
64c0d71c 2005 error("invalid pattern: %s", value_regex);
10bea152 2006 free(store.value_regex);
7a397419 2007 ret = CONFIG_INVALID_PATTERN;
dafc88b1 2008 goto out_free;
10bea152
JS
2009 }
2010 }
2011
83786fa4 2012 ALLOC_GROW(store.offset, 1, store.offset_alloc);
4ddba79d 2013 store.offset[0] = 0;
10bea152
JS
2014 store.state = START;
2015 store.seen = 0;
2016
2017 /*
2018 * After this, store.offset will contain the *end* offset
2019 * of the last match, or remain at 0 if no match was found.
2020 * As a side effect, we make sure to transform only a valid
2021 * existing config file.
2022 */
ef90d6d4 2023 if (git_config_from_file(store_aux, config_filename, NULL)) {
64c0d71c 2024 error("invalid config file %s", config_filename);
10bea152 2025 free(store.key);
c1063be2
JK
2026 if (store.value_regex != NULL &&
2027 store.value_regex != CONFIG_REGEX_NONE) {
10bea152
JS
2028 regfree(store.value_regex);
2029 free(store.value_regex);
2030 }
7a397419 2031 ret = CONFIG_INVALID_FILE;
dafc88b1 2032 goto out_free;
10bea152
JS
2033 }
2034
2035 free(store.key);
c1063be2
JK
2036 if (store.value_regex != NULL &&
2037 store.value_regex != CONFIG_REGEX_NONE) {
10bea152
JS
2038 regfree(store.value_regex);
2039 free(store.value_regex);
2040 }
2041
4ddba79d
JS
2042 /* if nothing to unset, or too many matches, error out */
2043 if ((store.seen == 0 && value == NULL) ||
2044 (store.seen > 1 && multi_replace == 0)) {
7a397419 2045 ret = CONFIG_NOTHING_SET;
dafc88b1 2046 goto out_free;
10bea152
JS
2047 }
2048
88fb958b 2049 fstat(in_fd, &st);
dc49cd76
SP
2050 contents_sz = xsize_t(st.st_size);
2051 contents = xmmap(NULL, contents_sz, PROT_READ,
10bea152
JS
2052 MAP_PRIVATE, in_fd, 0);
2053 close(in_fd);
2054
cf6950d3 2055 if (chmod(lock->filename.buf, st.st_mode & 07777) < 0) {
2569d239 2056 error("chmod on %s failed: %s",
cf6950d3 2057 lock->filename.buf, strerror(errno));
daa22c6f
EW
2058 ret = CONFIG_NO_WRITE;
2059 goto out_free;
2060 }
2061
4ddba79d
JS
2062 if (store.seen == 0)
2063 store.seen = 1;
2064
2065 for (i = 0, copy_begin = 0; i < store.seen; i++) {
2066 if (store.offset[i] == 0) {
dc49cd76 2067 store.offset[i] = copy_end = contents_sz;
4ddba79d
JS
2068 } else if (store.state != KEY_SEEN) {
2069 copy_end = store.offset[i];
10bea152 2070 } else
4ddba79d 2071 copy_end = find_beginning_of_line(
dc49cd76 2072 contents, contents_sz,
4ddba79d
JS
2073 store.offset[i]-2, &new_line);
2074
02e5ba4a
JK
2075 if (copy_end > 0 && contents[copy_end-1] != '\n')
2076 new_line = 1;
2077
4ddba79d
JS
2078 /* write the first part of the config */
2079 if (copy_end > copy_begin) {
93c1e079
JH
2080 if (write_in_full(fd, contents + copy_begin,
2081 copy_end - copy_begin) <
2082 copy_end - copy_begin)
2083 goto write_err_out;
2084 if (new_line &&
2b7ca830 2085 write_str_in_full(fd, "\n") != 1)
93c1e079 2086 goto write_err_out;
4ddba79d
JS
2087 }
2088 copy_begin = store.offset[i];
10bea152
JS
2089 }
2090
10bea152
JS
2091 /* write the pair (value == NULL means unset) */
2092 if (value != NULL) {
93c1e079
JH
2093 if (store.state == START) {
2094 if (!store_write_section(fd, key))
2095 goto write_err_out;
480c9e52 2096 }
93c1e079
JH
2097 if (!store_write_pair(fd, key, value))
2098 goto write_err_out;
10bea152
JS
2099 }
2100
2101 /* write the rest of the config */
dc49cd76 2102 if (copy_begin < contents_sz)
93c1e079 2103 if (write_in_full(fd, contents + copy_begin,
dc49cd76
SP
2104 contents_sz - copy_begin) <
2105 contents_sz - copy_begin)
93c1e079 2106 goto write_err_out;
10bea152
JS
2107 }
2108
4ed7cd3a 2109 if (commit_lock_file(lock) < 0) {
64c0d71c 2110 error("could not commit config file %s", config_filename);
7a397419 2111 ret = CONFIG_NO_WRITE;
e831855e 2112 lock = NULL;
dafc88b1 2113 goto out_free;
10bea152
JS
2114 }
2115
6cbf973c
BS
2116 /*
2117 * lock is committed, so don't try to roll it back below.
2118 * NOTE: Since lockfile.c keeps a linked list of all created
2119 * lock_file structures, it isn't safe to free(lock). It's
2120 * better to just leave it hanging around.
2121 */
2122 lock = NULL;
dafc88b1
SH
2123 ret = 0;
2124
3c8687a7
TA
2125 /* Invalidate the config cache */
2126 git_config_clear();
2127
dafc88b1 2128out_free:
6cbf973c
BS
2129 if (lock)
2130 rollback_lock_file(lock);
0a5f5759 2131 free(filename_buf);
3a1b3126
JK
2132 if (contents)
2133 munmap(contents, contents_sz);
dafc88b1 2134 return ret;
93c1e079
JH
2135
2136write_err_out:
cf6950d3 2137 ret = write_error(lock->filename.buf);
93c1e079
JH
2138 goto out_free;
2139
10bea152
JS
2140}
2141
5ec31182
RR
2142int git_config_set_multivar(const char *key, const char *value,
2143 const char *value_regex, int multi_replace)
2144{
4a7bb5ba 2145 return git_config_set_multivar_in_file(NULL, key, value, value_regex,
0a5f5759 2146 multi_replace);
5ec31182
RR
2147}
2148
118f8b24
PB
2149static int section_name_match (const char *buf, const char *name)
2150{
2151 int i = 0, j = 0, dot = 0;
a4c0d463
AV
2152 if (buf[i] != '[')
2153 return 0;
2154 for (i = 1; buf[i] && buf[i] != ']'; i++) {
118f8b24
PB
2155 if (!dot && isspace(buf[i])) {
2156 dot = 1;
2157 if (name[j++] != '.')
2158 break;
2159 for (i++; isspace(buf[i]); i++)
2160 ; /* do nothing */
2161 if (buf[i] != '"')
2162 break;
2163 continue;
2164 }
2165 if (buf[i] == '\\' && dot)
2166 i++;
2167 else if (buf[i] == '"' && dot) {
2168 for (i++; isspace(buf[i]); i++)
2169 ; /* do_nothing */
2170 break;
2171 }
2172 if (buf[i] != name[j++])
2173 break;
2174 }
a4c0d463
AV
2175 if (buf[i] == ']' && name[j] == 0) {
2176 /*
2177 * We match, now just find the right length offset by
2178 * gobbling up any whitespace after it, as well
2179 */
2180 i++;
2181 for (; buf[i] && isspace(buf[i]); i++)
2182 ; /* do nothing */
2183 return i;
2184 }
2185 return 0;
118f8b24
PB
2186}
2187
94a35b1a
JK
2188static int section_name_is_ok(const char *name)
2189{
2190 /* Empty section names are bogus. */
2191 if (!*name)
2192 return 0;
2193
2194 /*
2195 * Before a dot, we must be alphanumeric or dash. After the first dot,
2196 * anything goes, so we can stop checking.
2197 */
2198 for (; *name && *name != '.'; name++)
2199 if (*name != '-' && !isalnum(*name))
2200 return 0;
2201 return 1;
2202}
2203
118f8b24 2204/* if new_name == NULL, the section is removed instead */
42bd39b5
JK
2205int git_config_rename_section_in_file(const char *config_filename,
2206 const char *old_name, const char *new_name)
0667fcfb 2207{
118f8b24 2208 int ret = 0, remove = 0;
42bd39b5 2209 char *filename_buf = NULL;
94a35b1a 2210 struct lock_file *lock;
0667fcfb
JS
2211 int out_fd;
2212 char buf[1024];
924aaf3e 2213 FILE *config_file;
daa22c6f 2214 struct stat st;
0667fcfb 2215
94a35b1a
JK
2216 if (new_name && !section_name_is_ok(new_name)) {
2217 ret = error("invalid section name: %s", new_name);
2218 goto out;
2219 }
2220
42bd39b5
JK
2221 if (!config_filename)
2222 config_filename = filename_buf = git_pathdup("config");
2223
f1064f6b 2224 lock = xcalloc(1, sizeof(struct lock_file));
0667fcfb 2225 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
fc1905bb 2226 if (out_fd < 0) {
64c0d71c 2227 ret = error("could not lock config file %s", config_filename);
fc1905bb
JH
2228 goto out;
2229 }
0667fcfb 2230
fc1905bb 2231 if (!(config_file = fopen(config_filename, "rb"))) {
01ebb9dc
GB
2232 /* no config file means nothing to rename, no error */
2233 goto unlock_and_out;
fc1905bb 2234 }
0667fcfb 2235
daa22c6f
EW
2236 fstat(fileno(config_file), &st);
2237
cf6950d3 2238 if (chmod(lock->filename.buf, st.st_mode & 07777) < 0) {
2569d239 2239 ret = error("chmod on %s failed: %s",
cf6950d3 2240 lock->filename.buf, strerror(errno));
daa22c6f
EW
2241 goto out;
2242 }
2243
0667fcfb
JS
2244 while (fgets(buf, sizeof(buf), config_file)) {
2245 int i;
480c9e52 2246 int length;
9a5abfc7 2247 char *output = buf;
0667fcfb
JS
2248 for (i = 0; buf[i] && isspace(buf[i]); i++)
2249 ; /* do nothing */
2250 if (buf[i] == '[') {
2251 /* it's a section */
a4c0d463
AV
2252 int offset = section_name_match(&buf[i], old_name);
2253 if (offset > 0) {
118f8b24
PB
2254 ret++;
2255 if (new_name == NULL) {
2256 remove = 1;
0667fcfb
JS
2257 continue;
2258 }
0667fcfb 2259 store.baselen = strlen(new_name);
480c9e52 2260 if (!store_write_section(out_fd, new_name)) {
cf6950d3 2261 ret = write_error(lock->filename.buf);
480c9e52
AW
2262 goto out;
2263 }
9a5abfc7
AV
2264 /*
2265 * We wrote out the new section, with
2266 * a newline, now skip the old
2267 * section's length
2268 */
2269 output += offset + i;
2270 if (strlen(output) > 0) {
2271 /*
2272 * More content means there's
2273 * a declaration to put on the
2274 * next line; indent with a
2275 * tab
2276 */
2277 output -= 1;
2278 output[0] = '\t';
2279 }
0667fcfb 2280 }
118f8b24 2281 remove = 0;
0667fcfb 2282 }
118f8b24
PB
2283 if (remove)
2284 continue;
9a5abfc7
AV
2285 length = strlen(output);
2286 if (write_in_full(out_fd, output, length) != length) {
cf6950d3 2287 ret = write_error(lock->filename.buf);
480c9e52
AW
2288 goto out;
2289 }
0667fcfb 2290 }
fc1905bb 2291 fclose(config_file);
8b590075 2292unlock_and_out:
4ed7cd3a 2293 if (commit_lock_file(lock) < 0)
64c0d71c 2294 ret = error("could not commit config file %s", config_filename);
8b590075 2295out:
42bd39b5 2296 free(filename_buf);
0667fcfb
JS
2297 return ret;
2298}
40ea4ed9 2299
42bd39b5
JK
2300int git_config_rename_section(const char *old_name, const char *new_name)
2301{
4a7bb5ba 2302 return git_config_rename_section_in_file(NULL, old_name, new_name);
42bd39b5
JK
2303}
2304
40ea4ed9
JH
2305/*
2306 * Call this to report error for your variable that should not
2307 * get a boolean value (i.e. "[my] var" means "true").
2308 */
a469a101 2309#undef config_error_nonbool
40ea4ed9
JH
2310int config_error_nonbool(const char *var)
2311{
2312 return error("Missing value for '%s'", var);
2313}
1b86bbb0
JK
2314
2315int parse_config_key(const char *var,
2316 const char *section,
2317 const char **subsection, int *subsection_len,
2318 const char **key)
2319{
2320 int section_len = strlen(section);
2321 const char *dot;
2322
2323 /* Does it start with "section." ? */
59556548 2324 if (!starts_with(var, section) || var[section_len] != '.')
1b86bbb0
JK
2325 return -1;
2326
2327 /*
2328 * Find the key; we don't know yet if we have a subsection, but we must
2329 * parse backwards from the end, since the subsection may have dots in
2330 * it, too.
2331 */
2332 dot = strrchr(var, '.');
2333 *key = dot + 1;
2334
2335 /* Did we have a subsection at all? */
2336 if (dot == var + section_len) {
2337 *subsection = NULL;
2338 *subsection_len = 0;
2339 }
2340 else {
2341 *subsection = var + section_len + 1;
2342 *subsection_len = dot - *subsection;
2343 }
2344
2345 return 0;
2346}