1/*
2 * GIT - The information manager from hell
3 *
4 * Copyright (C) Linus Torvalds, 2005
5 */
6#include "cache.h"
7#include "strbuf.h"
8#include "quote.h"
9#include "cache-tree.h"
10#include "tree-walk.h"
11/*
13 * Default to not allowing changes to the list of files. The
14 * tool doesn't actually care, but this makes it harder to add
15 * files to the revision control by mistake by doing something
16 * like "git-update-index *" and suddenly having all the object
17 * files be revision controlled.
18 */
19static int allow_add;
20static int allow_remove;
21static int allow_replace;
22static int allow_unmerged; /* --refresh needing merge is not error */
23static int not_new; /* --refresh not having working tree files is not error */
24static int quiet; /* --refresh needing update is not error */
25static int info_only;
26static int force_remove;
27static int verbose;
28static int mark_valid_only = 0;
29#define MARK_VALID 1
30#define UNMARK_VALID 2
31/* Three functions to allow overloaded pointer return; see linux/err.h */
34static inline void *ERR_PTR(long error)
35{
36 return (void *) error;
37}
38static inline long PTR_ERR(const void *ptr)
40{
41 return (long) ptr;
42}
43static inline long IS_ERR(const void *ptr)
45{
46 return (unsigned long)ptr > (unsigned long)-1000L;
47}
48static void report(const char *fmt, ...)
50{
51 va_list vp;
52 if (!verbose)
54 return;
55 va_start(vp, fmt);
57 vprintf(fmt, vp);
58 putchar('\n');
59 va_end(vp);
60}
61static int mark_valid(const char *path)
63{
64 int namelen = strlen(path);
65 int pos = cache_name_pos(path, namelen);
66 if (0 <= pos) {
67 switch (mark_valid_only) {
68 case MARK_VALID:
69 active_cache[pos]->ce_flags |= htons(CE_VALID);
70 break;
71 case UNMARK_VALID:
72 active_cache[pos]->ce_flags &= ~htons(CE_VALID);
73 break;
74 }
75 cache_tree_invalidate_path(active_cache_tree, path);
76 active_cache_changed = 1;
77 return 0;
78 }
79 return -1;
80}
81static int add_file_to_cache(const char *path)
83{
84 int size, namelen, option, status;
85 struct cache_entry *ce;
86 struct stat st;
87 status = lstat(path, &st);
89 /* We probably want to do this in remove_file_from_cache() and
91 * add_cache_entry() instead...
92 */
93 cache_tree_invalidate_path(active_cache_tree, path);
94 if (status < 0 || S_ISDIR(st.st_mode)) {
96 /* When we used to have "path" and now we want to add
97 * "path/file", we need a way to remove "path" before
98 * being able to add "path/file". However,
99 * "git-update-index --remove path" would not work.
100 * --force-remove can be used but this is more user
101 * friendly, especially since we can do the opposite
102 * case just fine without --force-remove.
103 */
104 if (status == 0 || (errno == ENOENT || errno == ENOTDIR)) {
105 if (allow_remove) {
106 if (remove_file_from_cache(path))
107 return error("%s: cannot remove from the index",
108 path);
109 else
110 return 0;
111 } else if (status < 0) {
112 return error("%s: does not exist and --remove not passed",
113 path);
114 }
115 }
116 if (0 == status)
117 return error("%s: is a directory - add files inside instead",
118 path);
119 else
120 return error("lstat(\"%s\"): %s", path,
121 strerror(errno));
122 }
123 namelen = strlen(path);
125 size = cache_entry_size(namelen);
126 ce = xcalloc(1, size);
127 memcpy(ce->name, path, namelen);
128 ce->ce_flags = htons(namelen);
129 fill_stat_cache_info(ce, &st);
130 ce->ce_mode = create_ce_mode(st.st_mode);
132 if (!trust_executable_bit) {
133 /* If there is an existing entry, pick the mode bits
134 * from it.
135 */
136 int pos = cache_name_pos(path, namelen);
137 if (0 <= pos)
138 ce->ce_mode = active_cache[pos]->ce_mode;
139 }
140 if (index_path(ce->sha1, path, &st, !info_only))
142 return -1;
143 option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
144 option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
145 if (add_cache_entry(ce, option))
146 return error("%s: cannot add to the index - missing --add option?",
147 path);
148 return 0;
149}
150/*
152 * "refresh" does not calculate a new sha1 file or bring the
153 * cache up-to-date for mode/content changes. But what it
154 * _does_ do is to "re-match" the stat information of a file
155 * with the cache, so that you can refresh the cache for a
156 * file that hasn't been changed but where the stat entry is
157 * out of date.
158 *
159 * For example, you'd want to do this after doing a "git-read-tree",
160 * to link up the stat cache details with the proper files.
161 */
162static struct cache_entry *refresh_entry(struct cache_entry *ce, int really)
163{
164 struct stat st;
165 struct cache_entry *updated;
166 int changed, size;
167 if (lstat(ce->name, &st) < 0)
169 return ERR_PTR(-errno);
170 changed = ce_match_stat(ce, &st, really);
172 if (!changed) {
173 if (really && assume_unchanged &&
174 !(ce->ce_flags & htons(CE_VALID)))
175 ; /* mark this one VALID again */
176 else
177 return NULL;
178 }
179 if (ce_modified(ce, &st, really))
181 return ERR_PTR(-EINVAL);
182 size = ce_size(ce);
184 updated = xmalloc(size);
185 memcpy(updated, ce, size);
186 fill_stat_cache_info(updated, &st);
187 /* In this case, if really is not set, we should leave
189 * CE_VALID bit alone. Otherwise, paths marked with
190 * --no-assume-unchanged (i.e. things to be edited) will
191 * reacquire CE_VALID bit automatically, which is not
192 * really what we want.
193 */
194 if (!really && assume_unchanged && !(ce->ce_flags & htons(CE_VALID)))
195 updated->ce_flags &= ~htons(CE_VALID);
196 return updated;
198}
199static int refresh_cache(int really)
201{
202 int i;
203 int has_errors = 0;
204 for (i = 0; i < active_nr; i++) {
206 struct cache_entry *ce, *new;
207 ce = active_cache[i];
208 if (ce_stage(ce)) {
209 while ((i < active_nr) &&
210 ! strcmp(active_cache[i]->name, ce->name))
211 i++;
212 i--;
213 if (allow_unmerged)
214 continue;
215 printf("%s: needs merge\n", ce->name);
216 has_errors = 1;
217 continue;
218 }
219 new = refresh_entry(ce, really);
221 if (!new)
222 continue;
223 if (IS_ERR(new)) {
224 if (not_new && PTR_ERR(new) == -ENOENT)
225 continue;
226 if (really && PTR_ERR(new) == -EINVAL) {
227 /* If we are doing --really-refresh that
228 * means the index is not valid anymore.
229 */
230 ce->ce_flags &= ~htons(CE_VALID);
231 active_cache_changed = 1;
232 }
233 if (quiet)
234 continue;
235 printf("%s: needs update\n", ce->name);
236 has_errors = 1;
237 continue;
238 }
239 active_cache_changed = 1;
240 /* You can NOT just free active_cache[i] here, since it
241 * might not be necessarily malloc()ed but can also come
242 * from mmap(). */
243 active_cache[i] = new;
244 }
245 return has_errors;
246}
247/*
249 * We fundamentally don't like some paths: we don't want
250 * dot or dot-dot anywhere, and for obvious reasons don't
251 * want to recurse into ".git" either.
252 *
253 * Also, we don't want double slashes or slashes at the
254 * end that can make pathnames ambiguous.
255 */
256static int verify_dotfile(const char *rest)
257{
258 /*
259 * The first character was '.', but that
260 * has already been discarded, we now test
261 * the rest.
262 */
263 switch (*rest) {
264 /* "." is not allowed */
265 case '\0': case '/':
266 return 0;
267 /*
269 * ".git" followed by NUL or slash is bad. This
270 * shares the path end test with the ".." case.
271 */
272 case 'g':
273 if (rest[1] != 'i')
274 break;
275 if (rest[2] != 't')
276 break;
277 rest += 2;
278 /* fallthrough */
279 case '.':
280 if (rest[1] == '\0' || rest[1] == '/')
281 return 0;
282 }
283 return 1;
284}
285static int verify_path(const char *path)
287{
288 char c;
289 goto inside;
291 for (;;) {
292 if (!c)
293 return 1;
294 if (c == '/') {
295inside:
296 c = *path++;
297 switch (c) {
298 default:
299 continue;
300 case '/': case '\0':
301 break;
302 case '.':
303 if (verify_dotfile(path))
304 continue;
305 }
306 return 0;
307 }
308 c = *path++;
309 }
310}
311static int add_cacheinfo(unsigned int mode, const unsigned char *sha1,
313 const char *path, int stage)
314{
315 int size, len, option;
316 struct cache_entry *ce;
317 if (!verify_path(path))
319 return -1;
320 len = strlen(path);
322 size = cache_entry_size(len);
323 ce = xcalloc(1, size);
324 memcpy(ce->sha1, sha1, 20);
326 memcpy(ce->name, path, len);
327 ce->ce_flags = create_ce_flags(len, stage);
328 ce->ce_mode = create_ce_mode(mode);
329 if (assume_unchanged)
330 ce->ce_flags |= htons(CE_VALID);
331 option = allow_add ? ADD_CACHE_OK_TO_ADD : 0;
332 option |= allow_replace ? ADD_CACHE_OK_TO_REPLACE : 0;
333 if (add_cache_entry(ce, option))
334 return error("%s: cannot add to the index - missing --add option?",
335 path);
336 report("add '%s'", path);
337 cache_tree_invalidate_path(active_cache_tree, path);
338 return 0;
339}
340static void chmod_path(int flip, const char *path)
342{
343 int pos;
344 struct cache_entry *ce;
345 unsigned int mode;
346 pos = cache_name_pos(path, strlen(path));
348 if (pos < 0)
349 goto fail;
350 ce = active_cache[pos];
351 mode = ntohl(ce->ce_mode);
352 if (!S_ISREG(mode))
353 goto fail;
354 switch (flip) {
355 case '+':
356 ce->ce_mode |= htonl(0111); break;
357 case '-':
358 ce->ce_mode &= htonl(~0111); break;
359 default:
360 goto fail;
361 }
362 cache_tree_invalidate_path(active_cache_tree, path);
363 active_cache_changed = 1;
364 report("chmod %cx '%s'", flip, path);
365 return;
366 fail:
367 die("git-update-index: cannot chmod %cx '%s'", flip, path);
368}
369static struct cache_file cache_file;
371static void update_one(const char *path, const char *prefix, int prefix_length)
373{
374 const char *p = prefix_path(prefix, prefix_length, path);
375 if (!verify_path(p)) {
376 fprintf(stderr, "Ignoring path %s\n", path);
377 goto free_return;
378 }
379 if (mark_valid_only) {
380 if (mark_valid(p))
381 die("Unable to mark file %s", path);
382 goto free_return;
383 }
384 cache_tree_invalidate_path(active_cache_tree, path);
385 if (force_remove) {
387 if (remove_file_from_cache(p))
388 die("git-update-index: unable to remove %s", path);
389 report("remove '%s'", path);
390 goto free_return;
391 }
392 if (add_file_to_cache(p))
393 die("Unable to process file %s", path);
394 report("add '%s'", path);
395 free_return:
396 if (p != path)
397 free((char*)p);
398}
399static void read_index_info(int line_termination)
401{
402 struct strbuf buf;
403 strbuf_init(&buf);
404 while (1) {
405 char *ptr, *tab;
406 char *path_name;
407 unsigned char sha1[20];
408 unsigned int mode;
409 int stage;
410 /* This reads lines formatted in one of three formats:
412 *
413 * (1) mode SP sha1 TAB path
414 * The first format is what "git-apply --index-info"
415 * reports, and used to reconstruct a partial tree
416 * that is used for phony merge base tree when falling
417 * back on 3-way merge.
418 *
419 * (2) mode SP type SP sha1 TAB path
420 * The second format is to stuff git-ls-tree output
421 * into the index file.
422 *
423 * (3) mode SP sha1 SP stage TAB path
424 * This format is to put higher order stages into the
425 * index file and matches git-ls-files --stage output.
426 */
427 read_line(&buf, stdin, line_termination);
428 if (buf.eof)
429 break;
430 mode = strtoul(buf.buf, &ptr, 8);
432 if (ptr == buf.buf || *ptr != ' ')
433 goto bad_line;
434 tab = strchr(ptr, '\t');
436 if (!tab || tab - ptr < 41)
437 goto bad_line;
438 if (tab[-2] == ' ' && '0' <= tab[-1] && tab[-1] <= '3') {
440 stage = tab[-1] - '0';
441 ptr = tab + 1; /* point at the head of path */
442 tab = tab - 2; /* point at tail of sha1 */
443 }
444 else {
445 stage = 0;
446 ptr = tab + 1; /* point at the head of path */
447 }
448 if (get_sha1_hex(tab - 40, sha1) || tab[-41] != ' ')
450 goto bad_line;
451 if (line_termination && ptr[0] == '"')
453 path_name = unquote_c_style(ptr, NULL);
454 else
455 path_name = ptr;
456 if (!verify_path(path_name)) {
458 fprintf(stderr, "Ignoring path %s\n", path_name);
459 if (path_name != ptr)
460 free(path_name);
461 continue;
462 }
463 cache_tree_invalidate_path(active_cache_tree, path_name);
464 if (!mode) {
466 /* mode == 0 means there is no such path -- remove */
467 if (remove_file_from_cache(path_name))
468 die("git-update-index: unable to remove %s",
469 ptr);
470 }
471 else {
472 /* mode ' ' sha1 '\t' name
473 * ptr[-1] points at tab,
474 * ptr[-41] is at the beginning of sha1
475 */
476 ptr[-42] = ptr[-1] = 0;
477 if (add_cacheinfo(mode, sha1, path_name, stage))
478 die("git-update-index: unable to update %s",
479 path_name);
480 }
481 if (path_name != ptr)
482 free(path_name);
483 continue;
484 bad_line:
486 die("malformed index info %s", buf.buf);
487 }
488}
489static const char update_index_usage[] =
491"git-update-index [-q] [--add] [--replace] [--remove] [--unmerged] [--refresh] [--really-refresh] [--cacheinfo] [--chmod=(+|-)x] [--assume-unchanged] [--info-only] [--force-remove] [--stdin] [--index-info] [--unresolve] [--again] [--ignore-missing] [-z] [--verbose] [--] <file>...";
492static unsigned char head_sha1[20];
494static unsigned char merge_head_sha1[20];
495static struct cache_entry *read_one_ent(const char *which,
497 unsigned char *ent, const char *path,
498 int namelen, int stage)
499{
500 unsigned mode;
501 unsigned char sha1[20];
502 int size;
503 struct cache_entry *ce;
504 if (get_tree_entry(ent, path, sha1, &mode)) {
506 if (which)
507 error("%s: not in %s branch.", path, which);
508 return NULL;
509 }
510 if (mode == S_IFDIR) {
511 if (which)
512 error("%s: not a blob in %s branch.", path, which);
513 return NULL;
514 }
515 size = cache_entry_size(namelen);
516 ce = xcalloc(1, size);
517 memcpy(ce->sha1, sha1, 20);
519 memcpy(ce->name, path, namelen);
520 ce->ce_flags = create_ce_flags(namelen, stage);
521 ce->ce_mode = create_ce_mode(mode);
522 return ce;
523}
524static int unresolve_one(const char *path)
526{
527 int namelen = strlen(path);
528 int pos;
529 int ret = 0;
530 struct cache_entry *ce_2 = NULL, *ce_3 = NULL;
531 /* See if there is such entry in the index. */
533 pos = cache_name_pos(path, namelen);
534 if (pos < 0) {
535 /* If there isn't, either it is unmerged, or
536 * resolved as "removed" by mistake. We do not
537 * want to do anything in the former case.
538 */
539 pos = -pos-1;
540 if (pos < active_nr) {
541 struct cache_entry *ce = active_cache[pos];
542 if (ce_namelen(ce) == namelen &&
543 !memcmp(ce->name, path, namelen)) {
544 fprintf(stderr,
545 "%s: skipping still unmerged path.\n",
546 path);
547 goto free_return;
548 }
549 }
550 }
551 /* Grab blobs from given path from HEAD and MERGE_HEAD,
553 * stuff HEAD version in stage #2,
554 * stuff MERGE_HEAD version in stage #3.
555 */
556 ce_2 = read_one_ent("our", head_sha1, path, namelen, 2);
557 ce_3 = read_one_ent("their", merge_head_sha1, path, namelen, 3);
558 if (!ce_2 || !ce_3) {
560 ret = -1;
561 goto free_return;
562 }
563 if (!memcmp(ce_2->sha1, ce_3->sha1, 20) &&
564 ce_2->ce_mode == ce_3->ce_mode) {
565 fprintf(stderr, "%s: identical in both, skipping.\n",
566 path);
567 goto free_return;
568 }
569 cache_tree_invalidate_path(active_cache_tree, path);
571 remove_file_from_cache(path);
572 if (add_cache_entry(ce_2, ADD_CACHE_OK_TO_ADD)) {
573 error("%s: cannot add our version to the index.", path);
574 ret = -1;
575 goto free_return;
576 }
577 if (!add_cache_entry(ce_3, ADD_CACHE_OK_TO_ADD))
578 return 0;
579 error("%s: cannot add their version to the index.", path);
580 ret = -1;
581 free_return:
582 free(ce_2);
583 free(ce_3);
584 return ret;
585}
586static void read_head_pointers(void)
588{
589 if (read_ref(git_path("HEAD"), head_sha1))
590 die("No HEAD -- no initial commit yet?\n");
591 if (read_ref(git_path("MERGE_HEAD"), merge_head_sha1)) {
592 fprintf(stderr, "Not in the middle of a merge.\n");
593 exit(0);
594 }
595}
596static int do_unresolve(int ac, const char **av,
598 const char *prefix, int prefix_length)
599{
600 int i;
601 int err = 0;
602 /* Read HEAD and MERGE_HEAD; if MERGE_HEAD does not exist, we
604 * are not doing a merge, so exit with success status.
605 */
606 read_head_pointers();
607 for (i = 1; i < ac; i++) {
609 const char *arg = av[i];
610 const char *p = prefix_path(prefix, prefix_length, arg);
611 err |= unresolve_one(p);
612 if (p != arg)
613 free((char*)p);
614 }
615 return err;
616}
617static int do_reupdate(int ac, const char **av,
619 const char *prefix, int prefix_length)
620{
621 /* Read HEAD and run update-index on paths that are
622 * merged and already different between index and HEAD.
623 */
624 int pos;
625 int has_head = 1;
626 char **pathspec = get_pathspec(prefix, av + 1);
627 if (read_ref(git_path("HEAD"), head_sha1))
629 /* If there is no HEAD, that means it is an initial
630 * commit. Update everything in the index.
631 */
632 has_head = 0;
633 redo:
634 for (pos = 0; pos < active_nr; pos++) {
635 struct cache_entry *ce = active_cache[pos];
636 struct cache_entry *old = NULL;
637 int save_nr;
638 if (ce_stage(ce) || !ce_path_match(ce, pathspec))
640 continue;
641 if (has_head)
642 old = read_one_ent(NULL, head_sha1,
643 ce->name, ce_namelen(ce), 0);
644 if (old && ce->ce_mode == old->ce_mode &&
645 !memcmp(ce->sha1, old->sha1, 20)) {
646 free(old);
647 continue; /* unchanged */
648 }
649 /* Be careful. The working tree may not have the
650 * path anymore, in which case, under 'allow_remove',
651 * or worse yet 'allow_replace', active_nr may decrease.
652 */
653 save_nr = active_nr;
654 update_one(ce->name + prefix_length, prefix, prefix_length);
655 if (save_nr != active_nr)
656 goto redo;
657 }
658 return 0;
659}
660int main(int argc, const char **argv)
662{
663 int i, newfd, entries, has_errors = 0, line_termination = '\n';
664 int allow_options = 1;
665 int read_from_stdin = 0;
666 const char *prefix = setup_git_directory();
667 int prefix_length = prefix ? strlen(prefix) : 0;
668 char set_executable_bit = 0;
669 git_config(git_default_config);
671 newfd = hold_index_file_for_update(&cache_file, get_index_file());
673 if (newfd < 0)
674 die("unable to create new cachefile");
675 entries = read_cache();
677 if (entries < 0)
678 die("cache corrupted");
679 for (i = 1 ; i < argc; i++) {
681 const char *path = argv[i];
682 if (allow_options && *path == '-') {
684 if (!strcmp(path, "--")) {
685 allow_options = 0;
686 continue;
687 }
688 if (!strcmp(path, "-q")) {
689 quiet = 1;
690 continue;
691 }
692 if (!strcmp(path, "--add")) {
693 allow_add = 1;
694 continue;
695 }
696 if (!strcmp(path, "--replace")) {
697 allow_replace = 1;
698 continue;
699 }
700 if (!strcmp(path, "--remove")) {
701 allow_remove = 1;
702 continue;
703 }
704 if (!strcmp(path, "--unmerged")) {
705 allow_unmerged = 1;
706 continue;
707 }
708 if (!strcmp(path, "--refresh")) {
709 has_errors |= refresh_cache(0);
710 continue;
711 }
712 if (!strcmp(path, "--really-refresh")) {
713 has_errors |= refresh_cache(1);
714 continue;
715 }
716 if (!strcmp(path, "--cacheinfo")) {
717 unsigned char sha1[20];
718 unsigned int mode;
719 if (i+3 >= argc)
721 die("git-update-index: --cacheinfo <mode> <sha1> <path>");
722 if ((sscanf(argv[i+1], "%o", &mode) != 1) ||
724 get_sha1_hex(argv[i+2], sha1) ||
725 add_cacheinfo(mode, sha1, argv[i+3], 0))
726 die("git-update-index: --cacheinfo"
727 " cannot add %s", argv[i+3]);
728 i += 3;
729 continue;
730 }
731 if (!strcmp(path, "--chmod=-x") ||
732 !strcmp(path, "--chmod=+x")) {
733 if (argc <= i+1)
734 die("git-update-index: %s <path>", path);
735 set_executable_bit = path[8];
736 continue;
737 }
738 if (!strcmp(path, "--assume-unchanged")) {
739 mark_valid_only = MARK_VALID;
740 continue;
741 }
742 if (!strcmp(path, "--no-assume-unchanged")) {
743 mark_valid_only = UNMARK_VALID;
744 continue;
745 }
746 if (!strcmp(path, "--info-only")) {
747 info_only = 1;
748 continue;
749 }
750 if (!strcmp(path, "--force-remove")) {
751 force_remove = 1;
752 continue;
753 }
754 if (!strcmp(path, "-z")) {
755 line_termination = 0;
756 continue;
757 }
758 if (!strcmp(path, "--stdin")) {
759 if (i != argc - 1)
760 die("--stdin must be at the end");
761 read_from_stdin = 1;
762 break;
763 }
764 if (!strcmp(path, "--index-info")) {
765 if (i != argc - 1)
766 die("--index-info must be at the end");
767 allow_add = allow_replace = allow_remove = 1;
768 read_index_info(line_termination);
769 break;
770 }
771 if (!strcmp(path, "--unresolve")) {
772 has_errors = do_unresolve(argc - i, argv + i,
773 prefix, prefix_length);
774 if (has_errors)
775 active_cache_changed = 0;
776 goto finish;
777 }
778 if (!strcmp(path, "--again")) {
779 has_errors = do_reupdate(argc - i, argv + i,
780 prefix, prefix_length);
781 if (has_errors)
782 active_cache_changed = 0;
783 goto finish;
784 }
785 if (!strcmp(path, "--ignore-missing")) {
786 not_new = 1;
787 continue;
788 }
789 if (!strcmp(path, "--verbose")) {
790 verbose = 1;
791 continue;
792 }
793 if (!strcmp(path, "-h") || !strcmp(path, "--help"))
794 usage(update_index_usage);
795 die("unknown option %s", path);
796 }
797 update_one(path, prefix, prefix_length);
798 if (set_executable_bit)
799 chmod_path(set_executable_bit, path);
800 }
801 if (read_from_stdin) {
802 struct strbuf buf;
803 strbuf_init(&buf);
804 while (1) {
805 char *path_name;
806 const char *p;
807 read_line(&buf, stdin, line_termination);
808 if (buf.eof)
809 break;
810 if (line_termination && buf.buf[0] == '"')
811 path_name = unquote_c_style(buf.buf, NULL);
812 else
813 path_name = buf.buf;
814 p = prefix_path(prefix, prefix_length, path_name);
815 update_one(p, NULL, 0);
816 if (set_executable_bit)
817 chmod_path(set_executable_bit, p);
818 if (p != path_name)
819 free((char*) p);
820 if (path_name != buf.buf)
821 free(path_name);
822 }
823 }
824 finish:
826 if (active_cache_changed) {
827 if (write_cache(newfd, active_cache, active_nr) ||
828 commit_index_file(&cache_file))
829 die("Unable to write new cachefile");
830 }
831 return has_errors ? 1 : 0;
833}