7b8615d87d654dc39128a95b37f4a7bbcb0975d5
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#define MAXNAME (256)
12static FILE *config_file;
14static const char *config_file_name;
15static int config_linenr;
16static int config_file_eof;
17static int zlib_compression_seen;
18static int get_next_char(void)
20{
21 int c;
22 FILE *f;
23 c = '\n';
25 if ((f = config_file) != NULL) {
26 c = fgetc(f);
27 if (c == '\r') {
28 /* DOS like systems */
29 c = fgetc(f);
30 if (c != '\n') {
31 ungetc(c, f);
32 c = '\r';
33 }
34 }
35 if (c == '\n')
36 config_linenr++;
37 if (c == EOF) {
38 config_file_eof = 1;
39 c = '\n';
40 }
41 }
42 return c;
43}
44static char *parse_value(void)
46{
47 static char value[1024];
48 int quote = 0, comment = 0, len = 0, space = 0;
49 for (;;) {
51 int c = get_next_char();
52 if (len >= sizeof(value))
53 return NULL;
54 if (c == '\n') {
55 if (quote)
56 return NULL;
57 value[len] = 0;
58 return value;
59 }
60 if (comment)
61 continue;
62 if (isspace(c) && !quote) {
63 space = 1;
64 continue;
65 }
66 if (!quote) {
67 if (c == ';' || c == '#') {
68 comment = 1;
69 continue;
70 }
71 }
72 if (space) {
73 if (len)
74 value[len++] = ' ';
75 space = 0;
76 }
77 if (c == '\\') {
78 c = get_next_char();
79 switch (c) {
80 case '\n':
81 continue;
82 case 't':
83 c = '\t';
84 break;
85 case 'b':
86 c = '\b';
87 break;
88 case 'n':
89 c = '\n';
90 break;
91 /* Some characters escape as themselves */
92 case '\\': case '"':
93 break;
94 /* Reject unknown escape sequences */
95 default:
96 return NULL;
97 }
98 value[len++] = c;
99 continue;
100 }
101 if (c == '"') {
102 quote = 1-quote;
103 continue;
104 }
105 value[len++] = c;
106 }
107}
108static inline int iskeychar(int c)
110{
111 return isalnum(c) || c == '-';
112}
113static int get_value(config_fn_t fn, char *name, unsigned int len)
115{
116 int c;
117 char *value;
118 /* Get the full name */
120 for (;;) {
121 c = get_next_char();
122 if (config_file_eof)
123 break;
124 if (!iskeychar(c))
125 break;
126 name[len++] = tolower(c);
127 if (len >= MAXNAME)
128 return -1;
129 }
130 name[len] = 0;
131 while (c == ' ' || c == '\t')
132 c = get_next_char();
133 value = NULL;
135 if (c != '\n') {
136 if (c != '=')
137 return -1;
138 value = parse_value();
139 if (!value)
140 return -1;
141 }
142 return fn(name, value);
143}
144static int get_extended_base_var(char *name, int baselen, int c)
146{
147 do {
148 if (c == '\n')
149 return -1;
150 c = get_next_char();
151 } while (isspace(c));
152 /* We require the format to be '[base "extension"]' */
154 if (c != '"')
155 return -1;
156 name[baselen++] = '.';
157 for (;;) {
159 int c = get_next_char();
160 if (c == '\n')
161 return -1;
162 if (c == '"')
163 break;
164 if (c == '\\') {
165 c = get_next_char();
166 if (c == '\n')
167 return -1;
168 }
169 name[baselen++] = c;
170 if (baselen > MAXNAME / 2)
171 return -1;
172 }
173 /* Final ']' */
175 if (get_next_char() != ']')
176 return -1;
177 return baselen;
178}
179static int get_base_var(char *name)
181{
182 int baselen = 0;
183 for (;;) {
185 int c = get_next_char();
186 if (config_file_eof)
187 return -1;
188 if (c == ']')
189 return baselen;
190 if (isspace(c))
191 return get_extended_base_var(name, baselen, c);
192 if (!iskeychar(c) && c != '.')
193 return -1;
194 if (baselen > MAXNAME / 2)
195 return -1;
196 name[baselen++] = tolower(c);
197 }
198}
199static int git_parse_file(config_fn_t fn)
201{
202 int comment = 0;
203 int baselen = 0;
204 static char var[MAXNAME];
205 for (;;) {
207 int c = get_next_char();
208 if (c == '\n') {
209 if (config_file_eof)
210 return 0;
211 comment = 0;
212 continue;
213 }
214 if (comment || isspace(c))
215 continue;
216 if (c == '#' || c == ';') {
217 comment = 1;
218 continue;
219 }
220 if (c == '[') {
221 baselen = get_base_var(var);
222 if (baselen <= 0)
223 break;
224 var[baselen++] = '.';
225 var[baselen] = 0;
226 continue;
227 }
228 if (!isalpha(c))
229 break;
230 var[baselen] = tolower(c);
231 if (get_value(fn, var, baselen+1) < 0)
232 break;
233 }
234 die("bad config file line %d in %s", config_linenr, config_file_name);
235}
236static int parse_unit_factor(const char *end, unsigned long *val)
238{
239 if (!*end)
240 return 1;
241 else if (!strcasecmp(end, "k")) {
242 *val *= 1024;
243 return 1;
244 }
245 else if (!strcasecmp(end, "m")) {
246 *val *= 1024 * 1024;
247 return 1;
248 }
249 else if (!strcasecmp(end, "g")) {
250 *val *= 1024 * 1024 * 1024;
251 return 1;
252 }
253 return 0;
254}
255int git_parse_long(const char *value, long *ret)
257{
258 if (value && *value) {
259 char *end;
260 long val = strtol(value, &end, 0);
261 unsigned long factor = 1;
262 if (!parse_unit_factor(end, &factor))
263 return 0;
264 *ret = val * factor;
265 return 1;
266 }
267 return 0;
268}
269int git_parse_ulong(const char *value, unsigned long *ret)
271{
272 if (value && *value) {
273 char *end;
274 unsigned long val = strtoul(value, &end, 0);
275 if (!parse_unit_factor(end, &val))
276 return 0;
277 *ret = val;
278 return 1;
279 }
280 return 0;
281}
282int git_config_int(const char *name, const char *value)
284{
285 long ret;
286 if (!git_parse_long(value, &ret))
287 die("bad config value for '%s' in %s", name, config_file_name);
288 return ret;
289}
290unsigned long git_config_ulong(const char *name, const char *value)
292{
293 unsigned long ret;
294 if (!git_parse_ulong(value, &ret))
295 die("bad config value for '%s' in %s", name, config_file_name);
296 return ret;
297}
298int git_config_bool(const char *name, const char *value)
300{
301 if (!value)
302 return 1;
303 if (!*value)
304 return 0;
305 if (!strcasecmp(value, "true") || !strcasecmp(value, "yes"))
306 return 1;
307 if (!strcasecmp(value, "false") || !strcasecmp(value, "no"))
308 return 0;
309 return git_config_int(name, value) != 0;
310}
311int git_config_string(const char **dest, const char *var, const char *value)
313{
314 if (!value)
315 return config_error_nonbool(var);
316 *dest = xstrdup(value);
317 return 0;
318}
319int git_default_config(const char *var, const char *value)
321{
322 /* This needs a better name */
323 if (!strcmp(var, "core.filemode")) {
324 trust_executable_bit = git_config_bool(var, value);
325 return 0;
326 }
327 if (!strcmp(var, "core.quotepath")) {
329 quote_path_fully = git_config_bool(var, value);
330 return 0;
331 }
332 if (!strcmp(var, "core.symlinks")) {
334 has_symlinks = git_config_bool(var, value);
335 return 0;
336 }
337 if (!strcmp(var, "core.bare")) {
339 is_bare_repository_cfg = git_config_bool(var, value);
340 return 0;
341 }
342 if (!strcmp(var, "core.ignorestat")) {
344 assume_unchanged = git_config_bool(var, value);
345 return 0;
346 }
347 if (!strcmp(var, "core.prefersymlinkrefs")) {
349 prefer_symlink_refs = git_config_bool(var, value);
350 return 0;
351 }
352 if (!strcmp(var, "core.logallrefupdates")) {
354 log_all_ref_updates = git_config_bool(var, value);
355 return 0;
356 }
357 if (!strcmp(var, "core.warnambiguousrefs")) {
359 warn_ambiguous_refs = git_config_bool(var, value);
360 return 0;
361 }
362 if (!strcmp(var, "core.loosecompression")) {
364 int level = git_config_int(var, value);
365 if (level == -1)
366 level = Z_DEFAULT_COMPRESSION;
367 else if (level < 0 || level > Z_BEST_COMPRESSION)
368 die("bad zlib compression level %d", level);
369 zlib_compression_level = level;
370 zlib_compression_seen = 1;
371 return 0;
372 }
373 if (!strcmp(var, "core.compression")) {
375 int level = git_config_int(var, value);
376 if (level == -1)
377 level = Z_DEFAULT_COMPRESSION;
378 else if (level < 0 || level > Z_BEST_COMPRESSION)
379 die("bad zlib compression level %d", level);
380 core_compression_level = level;
381 core_compression_seen = 1;
382 if (!zlib_compression_seen)
383 zlib_compression_level = level;
384 return 0;
385 }
386 if (!strcmp(var, "core.packedgitwindowsize")) {
388 int pgsz_x2 = getpagesize() * 2;
389 packed_git_window_size = git_config_int(var, value);
390 /* This value must be multiple of (pagesize * 2) */
392 packed_git_window_size /= pgsz_x2;
393 if (packed_git_window_size < 1)
394 packed_git_window_size = 1;
395 packed_git_window_size *= pgsz_x2;
396 return 0;
397 }
398 if (!strcmp(var, "core.packedgitlimit")) {
400 packed_git_limit = git_config_int(var, value);
401 return 0;
402 }
403 if (!strcmp(var, "core.deltabasecachelimit")) {
405 delta_base_cache_limit = git_config_int(var, value);
406 return 0;
407 }
408 if (!strcmp(var, "core.autocrlf")) {
410 if (value && !strcasecmp(value, "input")) {
411 auto_crlf = -1;
412 return 0;
413 }
414 auto_crlf = git_config_bool(var, value);
415 return 0;
416 }
417 if (!strcmp(var, "user.name")) {
419 if (!value)
420 return config_error_nonbool(var);
421 strlcpy(git_default_name, value, sizeof(git_default_name));
422 return 0;
423 }
424 if (!strcmp(var, "user.email")) {
426 if (!value)
427 return config_error_nonbool(var);
428 strlcpy(git_default_email, value, sizeof(git_default_email));
429 return 0;
430 }
431 if (!strcmp(var, "i18n.commitencoding"))
433 return git_config_string(&git_commit_encoding, var, value);
434 if (!strcmp(var, "i18n.logoutputencoding"))
436 return git_config_string(&git_log_output_encoding, var, value);
437 if (!strcmp(var, "pager.color") || !strcmp(var, "color.pager")) {
439 pager_use_color = git_config_bool(var,value);
440 return 0;
441 }
442 if (!strcmp(var, "core.pager")) {
444 if (!value)
445 return config_error_nonbool(var);
446 pager_program = xstrdup(value);
447 return 0;
448 }
449 if (!strcmp(var, "core.editor")) {
451 if (!value)
452 return config_error_nonbool(var);
453 editor_program = xstrdup(value);
454 return 0;
455 }
456 if (!strcmp(var, "core.excludesfile")) {
458 if (!value)
459 return config_error_nonbool(var);
460 excludes_file = xstrdup(value);
461 return 0;
462 }
463 if (!strcmp(var, "core.whitespace")) {
465 if (!value)
466 return config_error_nonbool(var);
467 whitespace_rule_cfg = parse_whitespace_rule(value);
468 return 0;
469 }
470 /* Add other config variables here and to Documentation/config.txt. */
472 return 0;
473}
474int git_config_from_file(config_fn_t fn, const char *filename)
476{
477 int ret;
478 FILE *f = fopen(filename, "r");
479 ret = -1;
481 if (f) {
482 config_file = f;
483 config_file_name = filename;
484 config_linenr = 1;
485 config_file_eof = 0;
486 ret = git_parse_file(fn);
487 fclose(f);
488 config_file_name = NULL;
489 }
490 return ret;
491}
492const char *git_etc_gitconfig(void)
494{
495 static const char *system_wide;
496 if (!system_wide) {
497 system_wide = ETC_GITCONFIG;
498 if (!is_absolute_path(system_wide)) {
499 /* interpret path relative to exec-dir */
500 const char *exec_path = git_exec_path();
501 system_wide = prefix_path(exec_path, strlen(exec_path),
502 system_wide);
503 }
504 }
505 return system_wide;
506}
507int git_config(config_fn_t fn)
509{
510 int ret = 0;
511 char *repo_config = NULL;
512 const char *home = NULL, *filename;
513 /* $GIT_CONFIG makes git read _only_ the given config file,
515 * $GIT_CONFIG_LOCAL will make it process it in addition to the
516 * global config file, the same way it would the per-repository
517 * config file otherwise. */
518 filename = getenv(CONFIG_ENVIRONMENT);
519 if (!filename) {
520 if (!access(git_etc_gitconfig(), R_OK))
521 ret += git_config_from_file(fn, git_etc_gitconfig());
522 home = getenv("HOME");
523 filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
524 if (!filename)
525 filename = repo_config = xstrdup(git_path("config"));
526 }
527 if (home) {
529 char *user_config = xstrdup(mkpath("%s/.gitconfig", home));
530 if (!access(user_config, R_OK))
531 ret = git_config_from_file(fn, user_config);
532 free(user_config);
533 }
534 ret += git_config_from_file(fn, filename);
536 free(repo_config);
537 return ret;
538}
539/*
541 * Find all the stuff for git_config_set() below.
542 */
543#define MAX_MATCHES 512
545static struct {
547 int baselen;
548 char* key;
549 int do_not_match;
550 regex_t* value_regex;
551 int multi_replace;
552 size_t offset[MAX_MATCHES];
553 enum { START, SECTION_SEEN, SECTION_END_SEEN, KEY_SEEN } state;
554 int seen;
555} store;
556static int matches(const char* key, const char* value)
558{
559 return !strcmp(key, store.key) &&
560 (store.value_regex == NULL ||
561 (store.do_not_match ^
562 !regexec(store.value_regex, value, 0, NULL, 0)));
563}
564static int store_aux(const char* key, const char* value)
566{
567 const char *ep;
568 size_t section_len;
569 switch (store.state) {
571 case KEY_SEEN:
572 if (matches(key, value)) {
573 if (store.seen == 1 && store.multi_replace == 0) {
574 fprintf(stderr,
575 "Warning: %s has multiple values\n",
576 key);
577 } else if (store.seen >= MAX_MATCHES) {
578 fprintf(stderr, "Too many matches\n");
579 return 1;
580 }
581 store.offset[store.seen] = ftell(config_file);
583 store.seen++;
584 }
585 break;
586 case SECTION_SEEN:
587 /*
588 * What we are looking for is in store.key (both
589 * section and var), and its section part is baselen
590 * long. We found key (again, both section and var).
591 * We would want to know if this key is in the same
592 * section as what we are looking for. We already
593 * know we are in the same section as what should
594 * hold store.key.
595 */
596 ep = strrchr(key, '.');
597 section_len = ep - key;
598 if ((section_len != store.baselen) ||
600 memcmp(key, store.key, section_len+1)) {
601 store.state = SECTION_END_SEEN;
602 break;
603 }
604 /*
606 * Do not increment matches: this is no match, but we
607 * just made sure we are in the desired section.
608 */
609 store.offset[store.seen] = ftell(config_file);
610 /* fallthru */
611 case SECTION_END_SEEN:
612 case START:
613 if (matches(key, value)) {
614 store.offset[store.seen] = ftell(config_file);
615 store.state = KEY_SEEN;
616 store.seen++;
617 } else {
618 if (strrchr(key, '.') - key == store.baselen &&
619 !strncmp(key, store.key, store.baselen)) {
620 store.state = SECTION_SEEN;
621 store.offset[store.seen] = ftell(config_file);
622 }
623 }
624 }
625 return 0;
626}
627static int write_error(void)
629{
630 fprintf(stderr, "Failed to write new configuration file\n");
631 /* Same error code as "failed to rename". */
633 return 4;
634}
635static int store_write_section(int fd, const char* key)
637{
638 const char *dot;
639 int i, success;
640 struct strbuf sb;
641 strbuf_init(&sb, 0);
643 dot = memchr(key, '.', store.baselen);
644 if (dot) {
645 strbuf_addf(&sb, "[%.*s \"", (int)(dot - key), key);
646 for (i = dot - key + 1; i < store.baselen; i++) {
647 if (key[i] == '"')
648 strbuf_addch(&sb, '\\');
649 strbuf_addch(&sb, key[i]);
650 }
651 strbuf_addstr(&sb, "\"]\n");
652 } else {
653 strbuf_addf(&sb, "[%.*s]\n", store.baselen, key);
654 }
655 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
657 strbuf_release(&sb);
658 return success;
660}
661static int store_write_pair(int fd, const char* key, const char* value)
663{
664 int i, success;
665 int length = strlen(key + store.baselen + 1);
666 const char *quote = "";
667 struct strbuf sb;
668 /*
670 * Check to see if the value needs to be surrounded with a dq pair.
671 * Note that problematic characters are always backslash-quoted; this
672 * check is about not losing leading or trailing SP and strings that
673 * follow beginning-of-comment characters (i.e. ';' and '#') by the
674 * configuration parser.
675 */
676 if (value[0] == ' ')
677 quote = "\"";
678 for (i = 0; value[i]; i++)
679 if (value[i] == ';' || value[i] == '#')
680 quote = "\"";
681 if (i && value[i - 1] == ' ')
682 quote = "\"";
683 strbuf_init(&sb, 0);
685 strbuf_addf(&sb, "\t%.*s = %s",
686 length, key + store.baselen + 1, quote);
687 for (i = 0; value[i]; i++)
689 switch (value[i]) {
690 case '\n':
691 strbuf_addstr(&sb, "\\n");
692 break;
693 case '\t':
694 strbuf_addstr(&sb, "\\t");
695 break;
696 case '"':
697 case '\\':
698 strbuf_addch(&sb, '\\');
699 default:
700 strbuf_addch(&sb, value[i]);
701 break;
702 }
703 strbuf_addf(&sb, "%s\n", quote);
704 success = write_in_full(fd, sb.buf, sb.len) == sb.len;
706 strbuf_release(&sb);
707 return success;
709}
710static ssize_t find_beginning_of_line(const char* contents, size_t size,
712 size_t offset_, int* found_bracket)
713{
714 size_t equal_offset = size, bracket_offset = size;
715 ssize_t offset;
716contline:
718 for (offset = offset_-2; offset > 0
719 && contents[offset] != '\n'; offset--)
720 switch (contents[offset]) {
721 case '=': equal_offset = offset; break;
722 case ']': bracket_offset = offset; break;
723 }
724 if (offset > 0 && contents[offset-1] == '\\') {
725 offset_ = offset;
726 goto contline;
727 }
728 if (bracket_offset < equal_offset) {
729 *found_bracket = 1;
730 offset = bracket_offset+1;
731 } else
732 offset++;
733 return offset;
735}
736int git_config_set(const char* key, const char* value)
738{
739 return git_config_set_multivar(key, value, NULL, 0);
740}
741/*
743 * If value==NULL, unset in (remove from) config,
744 * if value_regex!=NULL, disregard key/value pairs where value does not match.
745 * if multi_replace==0, nothing, or only one matching key/value is replaced,
746 * else all matching key/values (regardless how many) are removed,
747 * before the new pair is written.
748 *
749 * Returns 0 on success.
750 *
751 * This function does this:
752 *
753 * - it locks the config file by creating ".git/config.lock"
754 *
755 * - it then parses the config using store_aux() as validator to find
756 * the position on the key/value pair to replace. If it is to be unset,
757 * it must be found exactly once.
758 *
759 * - the config file is mmap()ed and the part before the match (if any) is
760 * written to the lock file, then the changed part and the rest.
761 *
762 * - the config file is removed and the lock file rename()d to it.
763 *
764 */
765int git_config_set_multivar(const char* key, const char* value,
766 const char* value_regex, int multi_replace)
767{
768 int i, dot;
769 int fd = -1, in_fd;
770 int ret;
771 char* config_filename;
772 struct lock_file *lock = NULL;
773 const char* last_dot = strrchr(key, '.');
774 config_filename = getenv(CONFIG_ENVIRONMENT);
776 if (!config_filename) {
777 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
778 if (!config_filename)
779 config_filename = git_path("config");
780 }
781 config_filename = xstrdup(config_filename);
782 /*
784 * Since "key" actually contains the section name and the real
785 * key name separated by a dot, we have to know where the dot is.
786 */
787 if (last_dot == NULL) {
789 fprintf(stderr, "key does not contain a section: %s\n", key);
790 ret = 2;
791 goto out_free;
792 }
793 store.baselen = last_dot - key;
794 store.multi_replace = multi_replace;
796 /*
798 * Validate the key and while at it, lower case it for matching.
799 */
800 store.key = xmalloc(strlen(key) + 1);
801 dot = 0;
802 for (i = 0; key[i]; i++) {
803 unsigned char c = key[i];
804 if (c == '.')
805 dot = 1;
806 /* Leave the extended basename untouched.. */
807 if (!dot || i > store.baselen) {
808 if (!iskeychar(c) || (i == store.baselen+1 && !isalpha(c))) {
809 fprintf(stderr, "invalid key: %s\n", key);
810 free(store.key);
811 ret = 1;
812 goto out_free;
813 }
814 c = tolower(c);
815 } else if (c == '\n') {
816 fprintf(stderr, "invalid key (newline): %s\n", key);
817 free(store.key);
818 ret = 1;
819 goto out_free;
820 }
821 store.key[i] = c;
822 }
823 store.key[i] = 0;
824 /*
826 * The lock serves a purpose in addition to locking: the new
827 * contents of .git/config will be written into it.
828 */
829 lock = xcalloc(sizeof(struct lock_file), 1);
830 fd = hold_lock_file_for_update(lock, config_filename, 0);
831 if (fd < 0) {
832 fprintf(stderr, "could not lock config file\n");
833 free(store.key);
834 ret = -1;
835 goto out_free;
836 }
837 /*
839 * If .git/config does not exist yet, write a minimal version.
840 */
841 in_fd = open(config_filename, O_RDONLY);
842 if ( in_fd < 0 ) {
843 free(store.key);
844 if ( ENOENT != errno ) {
846 error("opening %s: %s", config_filename,
847 strerror(errno));
848 ret = 3; /* same as "invalid config file" */
849 goto out_free;
850 }
851 /* if nothing to unset, error out */
852 if (value == NULL) {
853 ret = 5;
854 goto out_free;
855 }
856 store.key = (char*)key;
858 if (!store_write_section(fd, key) ||
859 !store_write_pair(fd, key, value))
860 goto write_err_out;
861 } else {
862 struct stat st;
863 char* contents;
864 size_t contents_sz, copy_begin, copy_end;
865 int i, new_line = 0;
866 if (value_regex == NULL)
868 store.value_regex = NULL;
869 else {
870 if (value_regex[0] == '!') {
871 store.do_not_match = 1;
872 value_regex++;
873 } else
874 store.do_not_match = 0;
875 store.value_regex = (regex_t*)xmalloc(sizeof(regex_t));
877 if (regcomp(store.value_regex, value_regex,
878 REG_EXTENDED)) {
879 fprintf(stderr, "Invalid pattern: %s\n",
880 value_regex);
881 free(store.value_regex);
882 ret = 6;
883 goto out_free;
884 }
885 }
886 store.offset[0] = 0;
888 store.state = START;
889 store.seen = 0;
890 /*
892 * After this, store.offset will contain the *end* offset
893 * of the last match, or remain at 0 if no match was found.
894 * As a side effect, we make sure to transform only a valid
895 * existing config file.
896 */
897 if (git_config_from_file(store_aux, config_filename)) {
898 fprintf(stderr, "invalid config file\n");
899 free(store.key);
900 if (store.value_regex != NULL) {
901 regfree(store.value_regex);
902 free(store.value_regex);
903 }
904 ret = 3;
905 goto out_free;
906 }
907 free(store.key);
909 if (store.value_regex != NULL) {
910 regfree(store.value_regex);
911 free(store.value_regex);
912 }
913 /* if nothing to unset, or too many matches, error out */
915 if ((store.seen == 0 && value == NULL) ||
916 (store.seen > 1 && multi_replace == 0)) {
917 ret = 5;
918 goto out_free;
919 }
920 fstat(in_fd, &st);
922 contents_sz = xsize_t(st.st_size);
923 contents = xmmap(NULL, contents_sz, PROT_READ,
924 MAP_PRIVATE, in_fd, 0);
925 close(in_fd);
926 if (store.seen == 0)
928 store.seen = 1;
929 for (i = 0, copy_begin = 0; i < store.seen; i++) {
931 if (store.offset[i] == 0) {
932 store.offset[i] = copy_end = contents_sz;
933 } else if (store.state != KEY_SEEN) {
934 copy_end = store.offset[i];
935 } else
936 copy_end = find_beginning_of_line(
937 contents, contents_sz,
938 store.offset[i]-2, &new_line);
939 if (copy_end > 0 && contents[copy_end-1] != '\n')
941 new_line = 1;
942 /* write the first part of the config */
944 if (copy_end > copy_begin) {
945 if (write_in_full(fd, contents + copy_begin,
946 copy_end - copy_begin) <
947 copy_end - copy_begin)
948 goto write_err_out;
949 if (new_line &&
950 write_in_full(fd, "\n", 1) != 1)
951 goto write_err_out;
952 }
953 copy_begin = store.offset[i];
954 }
955 /* write the pair (value == NULL means unset) */
957 if (value != NULL) {
958 if (store.state == START) {
959 if (!store_write_section(fd, key))
960 goto write_err_out;
961 }
962 if (!store_write_pair(fd, key, value))
963 goto write_err_out;
964 }
965 /* write the rest of the config */
967 if (copy_begin < contents_sz)
968 if (write_in_full(fd, contents + copy_begin,
969 contents_sz - copy_begin) <
970 contents_sz - copy_begin)
971 goto write_err_out;
972 munmap(contents, contents_sz);
974 }
975 if (commit_lock_file(lock) < 0) {
977 fprintf(stderr, "Cannot commit config file!\n");
978 ret = 4;
979 goto out_free;
980 }
981 /*
983 * lock is committed, so don't try to roll it back below.
984 * NOTE: Since lockfile.c keeps a linked list of all created
985 * lock_file structures, it isn't safe to free(lock). It's
986 * better to just leave it hanging around.
987 */
988 lock = NULL;
989 ret = 0;
990out_free:
992 if (lock)
993 rollback_lock_file(lock);
994 free(config_filename);
995 return ret;
996write_err_out:
998 ret = write_error();
999 goto out_free;
1000}
1002static int section_name_match (const char *buf, const char *name)
1004{
1005 int i = 0, j = 0, dot = 0;
1006 for (; buf[i] && buf[i] != ']'; i++) {
1007 if (!dot && isspace(buf[i])) {
1008 dot = 1;
1009 if (name[j++] != '.')
1010 break;
1011 for (i++; isspace(buf[i]); i++)
1012 ; /* do nothing */
1013 if (buf[i] != '"')
1014 break;
1015 continue;
1016 }
1017 if (buf[i] == '\\' && dot)
1018 i++;
1019 else if (buf[i] == '"' && dot) {
1020 for (i++; isspace(buf[i]); i++)
1021 ; /* do_nothing */
1022 break;
1023 }
1024 if (buf[i] != name[j++])
1025 break;
1026 }
1027 return (buf[i] == ']' && name[j] == 0);
1028}
1029/* if new_name == NULL, the section is removed instead */
1031int git_config_rename_section(const char *old_name, const char *new_name)
1032{
1033 int ret = 0, remove = 0;
1034 char *config_filename;
1035 struct lock_file *lock = xcalloc(sizeof(struct lock_file), 1);
1036 int out_fd;
1037 char buf[1024];
1038 config_filename = getenv(CONFIG_ENVIRONMENT);
1040 if (!config_filename) {
1041 config_filename = getenv(CONFIG_LOCAL_ENVIRONMENT);
1042 if (!config_filename)
1043 config_filename = git_path("config");
1044 }
1045 config_filename = xstrdup(config_filename);
1046 out_fd = hold_lock_file_for_update(lock, config_filename, 0);
1047 if (out_fd < 0) {
1048 ret = error("Could not lock config file!");
1049 goto out;
1050 }
1051 if (!(config_file = fopen(config_filename, "rb"))) {
1053 /* no config file means nothing to rename, no error */
1054 goto unlock_and_out;
1055 }
1056 while (fgets(buf, sizeof(buf), config_file)) {
1058 int i;
1059 int length;
1060 for (i = 0; buf[i] && isspace(buf[i]); i++)
1061 ; /* do nothing */
1062 if (buf[i] == '[') {
1063 /* it's a section */
1064 if (section_name_match (&buf[i+1], old_name)) {
1065 ret++;
1066 if (new_name == NULL) {
1067 remove = 1;
1068 continue;
1069 }
1070 store.baselen = strlen(new_name);
1071 if (!store_write_section(out_fd, new_name)) {
1072 ret = write_error();
1073 goto out;
1074 }
1075 continue;
1076 }
1077 remove = 0;
1078 }
1079 if (remove)
1080 continue;
1081 length = strlen(buf);
1082 if (write_in_full(out_fd, buf, length) != length) {
1083 ret = write_error();
1084 goto out;
1085 }
1086 }
1087 fclose(config_file);
1088 unlock_and_out:
1089 if (commit_lock_file(lock) < 0)
1090 ret = error("Cannot commit config file!");
1091 out:
1092 free(config_filename);
1093 return ret;
1094}
1095/*
1097 * Call this to report error for your variable that should not
1098 * get a boolean value (i.e. "[my] var" means "true").
1099 */
1100int config_error_nonbool(const char *var)
1101{
1102 return error("Missing value for '%s'", var);
1103}