1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/types.h>
18 #include <sys/queue.h>
19 #include <sys/tree.h>
20 #include <sys/uio.h>
21 #include <sys/socket.h>
22 #include <sys/stat.h>
23 #include <sys/mman.h>
24 #include <sys/resource.h>
25 
26 #include <ctype.h>
27 #include <endian.h>
28 #include <fcntl.h>
29 #include <fnmatch.h>
30 #include <limits.h>
31 #include <dirent.h>
32 #include <stdlib.h>
33 #include <stdio.h>
34 #include <sha1.h>
35 #include <string.h>
36 #include <time.h>
37 #include <unistd.h>
38 #include <zlib.h>
39 #include <errno.h>
40 #include <libgen.h>
41 #include <stdint.h>
42 #include <imsg.h>
43 #include <uuid.h>
44 
45 #include "bloom.h"
46 
47 #include "got_error.h"
48 #include "got_reference.h"
49 #include "got_repository.h"
50 #include "got_path.h"
51 #include "got_cancel.h"
52 #include "got_object.h"
53 
54 #include "got_lib_delta.h"
55 #include "got_lib_inflate.h"
56 #include "got_lib_object.h"
57 #include "got_lib_object_parse.h"
58 #include "got_lib_object_create.h"
59 #include "got_lib_pack.h"
60 #include "got_lib_privsep.h"
61 #include "got_lib_sha1.h"
62 #include "got_lib_object_cache.h"
63 #include "got_lib_repository.h"
64 #include "got_lib_gotconfig.h"
65 
66 #ifndef nitems
67 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
68 #endif
69 
70 RB_PROTOTYPE(got_packidx_bloom_filter_tree, got_packidx_bloom_filter, entry,
71     got_packidx_bloom_filter_cmp);
72 
73 const char *
74 got_repo_get_path(struct got_repository *repo)
75 {
76 	return repo->path;
77 }
78 
79 const char *
80 got_repo_get_path_git_dir(struct got_repository *repo)
81 {
82 	return repo->path_git_dir;
83 }
84 
85 int
86 got_repo_get_fd(struct got_repository *repo)
87 {
88 	return repo->gitdir_fd;
89 }
90 
91 const char *
92 got_repo_get_gitconfig_author_name(struct got_repository *repo)
93 {
94 	return repo->gitconfig_author_name;
95 }
96 
97 const char *
98 got_repo_get_gitconfig_author_email(struct got_repository *repo)
99 {
100 	return repo->gitconfig_author_email;
101 }
102 
103 const char *
104 got_repo_get_global_gitconfig_author_name(struct got_repository *repo)
105 {
106 	return repo->global_gitconfig_author_name;
107 }
108 
109 const char *
110 got_repo_get_global_gitconfig_author_email(struct got_repository *repo)
111 {
112 	return repo->global_gitconfig_author_email;
113 }
114 
115 const char *
116 got_repo_get_gitconfig_owner(struct got_repository *repo)
117 {
118 	return repo->gitconfig_owner;
119 }
120 
121 void
122 got_repo_get_gitconfig_extensions(char ***extensions, int *nextensions,
123     struct got_repository *repo)
124 {
125 	*extensions = repo->extensions;
126 	*nextensions = repo->nextensions;
127 }
128 
129 int
130 got_repo_is_bare(struct got_repository *repo)
131 {
132 	return (strcmp(repo->path, repo->path_git_dir) == 0);
133 }
134 
135 static char *
136 get_path_git_child(struct got_repository *repo, const char *basename)
137 {
138 	char *path_child;
139 
140 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
141 	    basename) == -1)
142 		return NULL;
143 
144 	return path_child;
145 }
146 
147 char *
148 got_repo_get_path_objects(struct got_repository *repo)
149 {
150 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
151 }
152 
153 char *
154 got_repo_get_path_objects_pack(struct got_repository *repo)
155 {
156 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
157 }
158 
159 char *
160 got_repo_get_path_refs(struct got_repository *repo)
161 {
162 	return get_path_git_child(repo, GOT_REFS_DIR);
163 }
164 
165 char *
166 got_repo_get_path_packed_refs(struct got_repository *repo)
167 {
168 	return get_path_git_child(repo, GOT_PACKED_REFS_FILE);
169 }
170 
171 static char *
172 get_path_head(struct got_repository *repo)
173 {
174 	return get_path_git_child(repo, GOT_HEAD_FILE);
175 }
176 
177 char *
178 got_repo_get_path_gitconfig(struct got_repository *repo)
179 {
180 	return get_path_git_child(repo, GOT_GITCONFIG);
181 }
182 
183 char *
184 got_repo_get_path_gotconfig(struct got_repository *repo)
185 {
186 	return get_path_git_child(repo, GOT_GOTCONFIG_FILENAME);
187 }
188 
189 const struct got_gotconfig *
190 got_repo_get_gotconfig(struct got_repository *repo)
191 {
192 	return repo->gotconfig;
193 }
194 
195 void
196 got_repo_get_gitconfig_remotes(int *nremotes,
197     const struct got_remote_repo **remotes, struct got_repository *repo)
198 {
199 	*nremotes = repo->ngitconfig_remotes;
200 	*remotes = repo->gitconfig_remotes;
201 }
202 
203 static int
204 is_git_repo(struct got_repository *repo)
205 {
206 	const char *path_git = got_repo_get_path_git_dir(repo);
207 	char *path_objects = got_repo_get_path_objects(repo);
208 	char *path_refs = got_repo_get_path_refs(repo);
209 	char *path_head = get_path_head(repo);
210 	int ret = 0;
211 	struct stat sb;
212 	struct got_reference *head_ref;
213 
214 	if (lstat(path_git, &sb) == -1)
215 		goto done;
216 	if (!S_ISDIR(sb.st_mode))
217 		goto done;
218 
219 	if (lstat(path_objects, &sb) == -1)
220 		goto done;
221 	if (!S_ISDIR(sb.st_mode))
222 		goto done;
223 
224 	if (lstat(path_refs, &sb) == -1)
225 		goto done;
226 	if (!S_ISDIR(sb.st_mode))
227 		goto done;
228 
229 	if (lstat(path_head, &sb) == -1)
230 		goto done;
231 	if (!S_ISREG(sb.st_mode))
232 		goto done;
233 
234 	/* Check if the HEAD reference can be opened. */
235 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0) != NULL)
236 		goto done;
237 	got_ref_close(head_ref);
238 
239 	ret = 1;
240 done:
241 	free(path_objects);
242 	free(path_refs);
243 	free(path_head);
244 	return ret;
245 
246 }
247 
248 const struct got_error *
249 got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
250     struct got_object *obj)
251 {
252 #ifndef GOT_NO_OBJ_CACHE
253 	const struct got_error *err = NULL;
254 	err = got_object_cache_add(&repo->objcache, id, obj);
255 	if (err) {
256 		if (err->code == GOT_ERR_OBJ_EXISTS ||
257 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
258 			err = NULL;
259 		return err;
260 	}
261 	obj->refcnt++;
262 #endif
263 	return NULL;
264 }
265 
266 struct got_object *
267 got_repo_get_cached_object(struct got_repository *repo,
268     struct got_object_id *id)
269 {
270 	return (struct got_object *)got_object_cache_get(&repo->objcache, id);
271 }
272 
273 const struct got_error *
274 got_repo_cache_tree(struct got_repository *repo, struct got_object_id *id,
275     struct got_tree_object *tree)
276 {
277 #ifndef GOT_NO_OBJ_CACHE
278 	const struct got_error *err = NULL;
279 	err = got_object_cache_add(&repo->treecache, id, tree);
280 	if (err) {
281 		if (err->code == GOT_ERR_OBJ_EXISTS ||
282 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
283 			err = NULL;
284 		return err;
285 	}
286 	tree->refcnt++;
287 #endif
288 	return NULL;
289 }
290 
291 struct got_tree_object *
292 got_repo_get_cached_tree(struct got_repository *repo,
293     struct got_object_id *id)
294 {
295 	return (struct got_tree_object *)got_object_cache_get(
296 	    &repo->treecache, id);
297 }
298 
299 const struct got_error *
300 got_repo_cache_commit(struct got_repository *repo, struct got_object_id *id,
301     struct got_commit_object *commit)
302 {
303 #ifndef GOT_NO_OBJ_CACHE
304 	const struct got_error *err = NULL;
305 	err = got_object_cache_add(&repo->commitcache, id, commit);
306 	if (err) {
307 		if (err->code == GOT_ERR_OBJ_EXISTS ||
308 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
309 			err = NULL;
310 		return err;
311 	}
312 	commit->refcnt++;
313 #endif
314 	return NULL;
315 }
316 
317 struct got_commit_object *
318 got_repo_get_cached_commit(struct got_repository *repo,
319     struct got_object_id *id)
320 {
321 	return (struct got_commit_object *)got_object_cache_get(
322 	    &repo->commitcache, id);
323 }
324 
325 const struct got_error *
326 got_repo_cache_tag(struct got_repository *repo, struct got_object_id *id,
327     struct got_tag_object *tag)
328 {
329 #ifndef GOT_NO_OBJ_CACHE
330 	const struct got_error *err = NULL;
331 	err = got_object_cache_add(&repo->tagcache, id, tag);
332 	if (err) {
333 		if (err->code == GOT_ERR_OBJ_EXISTS ||
334 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
335 			err = NULL;
336 		return err;
337 	}
338 	tag->refcnt++;
339 #endif
340 	return NULL;
341 }
342 
343 struct got_tag_object *
344 got_repo_get_cached_tag(struct got_repository *repo, struct got_object_id *id)
345 {
346 	return (struct got_tag_object *)got_object_cache_get(
347 	    &repo->tagcache, id);
348 }
349 
350 const struct got_error *
351 got_repo_cache_raw_object(struct got_repository *repo, struct got_object_id *id,
352     struct got_raw_object *raw)
353 {
354 #ifndef GOT_NO_OBJ_CACHE
355 	const struct got_error *err = NULL;
356 	err = got_object_cache_add(&repo->rawcache, id, raw);
357 	if (err) {
358 		if (err->code == GOT_ERR_OBJ_EXISTS ||
359 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
360 			err = NULL;
361 		return err;
362 	}
363 	raw->refcnt++;
364 #endif
365 	return NULL;
366 }
367 
368 
369 struct got_raw_object *
370 got_repo_get_cached_raw_object(struct got_repository *repo,
371     struct got_object_id *id)
372 {
373 	return (struct got_raw_object *)got_object_cache_get(&repo->rawcache, id);
374 }
375 
376 
377 static const struct got_error *
378 open_repo(struct got_repository *repo, const char *path)
379 {
380 	const struct got_error *err = NULL;
381 
382 	repo->gitdir_fd = -1;
383 
384 	/* bare git repository? */
385 	repo->path_git_dir = strdup(path);
386 	if (repo->path_git_dir == NULL)
387 		return got_error_from_errno("strdup");
388 	if (is_git_repo(repo)) {
389 		repo->path = strdup(repo->path_git_dir);
390 		if (repo->path == NULL) {
391 			err = got_error_from_errno("strdup");
392 			goto done;
393 		}
394 		repo->gitdir_fd = open(repo->path_git_dir,
395 		    O_DIRECTORY | O_CLOEXEC);
396 		if (repo->gitdir_fd == -1) {
397 			err = got_error_from_errno2("open",
398 			    repo->path_git_dir);
399 			goto done;
400 		}
401 		return NULL;
402 	}
403 
404 	/* git repository with working tree? */
405 	free(repo->path_git_dir);
406 	repo->path_git_dir = NULL;
407 	if (asprintf(&repo->path_git_dir, "%s/%s", path, GOT_GIT_DIR) == -1) {
408 		err = got_error_from_errno("asprintf");
409 		goto done;
410 	}
411 	if (is_git_repo(repo)) {
412 		repo->path = strdup(path);
413 		if (repo->path == NULL) {
414 			err = got_error_from_errno("strdup");
415 			goto done;
416 		}
417 		repo->gitdir_fd = open(repo->path_git_dir,
418 		    O_DIRECTORY | O_CLOEXEC);
419 		if (repo->gitdir_fd == -1) {
420 			err = got_error_from_errno2("open",
421 			    repo->path_git_dir);
422 			goto done;
423 		}
424 		return NULL;
425 	}
426 
427 	err = got_error(GOT_ERR_NOT_GIT_REPO);
428 done:
429 	if (err) {
430 		free(repo->path);
431 		repo->path = NULL;
432 		free(repo->path_git_dir);
433 		repo->path_git_dir = NULL;
434 		if (repo->gitdir_fd != -1)
435 			close(repo->gitdir_fd);
436 		repo->gitdir_fd = -1;
437 
438 	}
439 	return err;
440 }
441 
442 static const struct got_error *
443 parse_gitconfig_file(int *gitconfig_repository_format_version,
444     char **gitconfig_author_name, char **gitconfig_author_email,
445     struct got_remote_repo **remotes, int *nremotes,
446     char **gitconfig_owner, char ***extensions, int *nextensions,
447     const char *gitconfig_path)
448 {
449 	const struct got_error *err = NULL, *child_err = NULL;
450 	int fd = -1;
451 	int imsg_fds[2] = { -1, -1 };
452 	pid_t pid;
453 	struct imsgbuf *ibuf;
454 
455 	*gitconfig_repository_format_version = 0;
456 	if (extensions)
457 		*extensions = NULL;
458 	if (nextensions)
459 		*nextensions = 0;
460 	*gitconfig_author_name = NULL;
461 	*gitconfig_author_email = NULL;
462 	if (remotes)
463 		*remotes = NULL;
464 	if (nremotes)
465 		*nremotes = 0;
466 	if (gitconfig_owner)
467 		*gitconfig_owner = NULL;
468 
469 	fd = open(gitconfig_path, O_RDONLY | O_CLOEXEC);
470 	if (fd == -1) {
471 		if (errno == ENOENT)
472 			return NULL;
473 		return got_error_from_errno2("open", gitconfig_path);
474 	}
475 
476 	ibuf = calloc(1, sizeof(*ibuf));
477 	if (ibuf == NULL) {
478 		err = got_error_from_errno("calloc");
479 		goto done;
480 	}
481 
482 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
483 		err = got_error_from_errno("socketpair");
484 		goto done;
485 	}
486 
487 	pid = fork();
488 	if (pid == -1) {
489 		err = got_error_from_errno("fork");
490 		goto done;
491 	} else if (pid == 0) {
492 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
493 		    gitconfig_path);
494 		/* not reached */
495 	}
496 
497 	if (close(imsg_fds[1]) == -1) {
498 		err = got_error_from_errno("close");
499 		goto done;
500 	}
501 	imsg_fds[1] = -1;
502 	imsg_init(ibuf, imsg_fds[0]);
503 
504 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
505 	if (err)
506 		goto done;
507 	fd = -1;
508 
509 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
510 	if (err)
511 		goto done;
512 
513 	err = got_privsep_recv_gitconfig_int(
514 	    gitconfig_repository_format_version, ibuf);
515 	if (err)
516 		goto done;
517 
518 	if (extensions && nextensions) {
519 		err = got_privsep_send_gitconfig_repository_extensions_req(
520 		    ibuf);
521 		if (err)
522 			goto done;
523 		err = got_privsep_recv_gitconfig_int(nextensions, ibuf);
524 		if (err)
525 			goto done;
526 		if (*nextensions > 0) {
527 			int i;
528 			*extensions = calloc(*nextensions, sizeof(char *));
529 			if (*extensions == NULL) {
530 				err = got_error_from_errno("calloc");
531 				goto done;
532 			}
533 			for (i = 0; i < *nextensions; i++) {
534 				char *ext;
535 				err = got_privsep_recv_gitconfig_str(&ext,
536 				    ibuf);
537 				if (err)
538 					goto done;
539 				(*extensions)[i] = ext;
540 			}
541 		}
542 	}
543 
544 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
545 	if (err)
546 		goto done;
547 
548 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
549 	if (err)
550 		goto done;
551 
552 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
553 	if (err)
554 		goto done;
555 
556 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
557 	if (err)
558 		goto done;
559 
560 	if (remotes && nremotes) {
561 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
562 		if (err)
563 			goto done;
564 
565 		err = got_privsep_recv_gitconfig_remotes(remotes,
566 		    nremotes, ibuf);
567 		if (err)
568 			goto done;
569 	}
570 
571 	if (gitconfig_owner) {
572 		err = got_privsep_send_gitconfig_owner_req(ibuf);
573 		if (err)
574 			goto done;
575 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
576 		if (err)
577 			goto done;
578 	}
579 
580 	err = got_privsep_send_stop(imsg_fds[0]);
581 	child_err = got_privsep_wait_for_child(pid);
582 	if (child_err && err == NULL)
583 		err = child_err;
584 done:
585 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
586 		err = got_error_from_errno("close");
587 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
588 		err = got_error_from_errno("close");
589 	if (fd != -1 && close(fd) == -1 && err == NULL)
590 		err = got_error_from_errno2("close", gitconfig_path);
591 	free(ibuf);
592 	return err;
593 }
594 
595 static const struct got_error *
596 read_gitconfig(struct got_repository *repo, const char *global_gitconfig_path)
597 {
598 	const struct got_error *err = NULL;
599 	char *repo_gitconfig_path = NULL;
600 
601 	if (global_gitconfig_path) {
602 		/* Read settings from ~/.gitconfig. */
603 		int dummy_repo_version;
604 		err = parse_gitconfig_file(&dummy_repo_version,
605 		    &repo->global_gitconfig_author_name,
606 		    &repo->global_gitconfig_author_email,
607 		    NULL, NULL, NULL, NULL, NULL, global_gitconfig_path);
608 		if (err)
609 			return err;
610 	}
611 
612 	/* Read repository's .git/config file. */
613 	repo_gitconfig_path = got_repo_get_path_gitconfig(repo);
614 	if (repo_gitconfig_path == NULL)
615 		return got_error_from_errno("got_repo_get_path_gitconfig");
616 
617 	err = parse_gitconfig_file(&repo->gitconfig_repository_format_version,
618 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
619 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
620 	    &repo->gitconfig_owner, &repo->extensions, &repo->nextensions,
621 	    repo_gitconfig_path);
622 	if (err)
623 		goto done;
624 done:
625 	free(repo_gitconfig_path);
626 	return err;
627 }
628 
629 static const struct got_error *
630 read_gotconfig(struct got_repository *repo)
631 {
632 	const struct got_error *err = NULL;
633 	char *gotconfig_path;
634 
635 	gotconfig_path = got_repo_get_path_gotconfig(repo);
636 	if (gotconfig_path == NULL)
637 		return got_error_from_errno("got_repo_get_path_gotconfig");
638 
639 	err = got_gotconfig_read(&repo->gotconfig, gotconfig_path);
640 	free(gotconfig_path);
641 	return err;
642 }
643 
644 /* Supported repository format extensions. */
645 static const char *repo_extensions[] = {
646 	"noop",			/* Got supports repository format version 1. */
647 	"preciousObjects",	/* Supported by gotadmin cleanup. */
648 	"worktreeConfig",	/* Got does not care about Git work trees. */
649 };
650 
651 const struct got_error *
652 got_repo_open(struct got_repository **repop, const char *path,
653     const char *global_gitconfig_path)
654 {
655 	struct got_repository *repo = NULL;
656 	const struct got_error *err = NULL;
657 	char *repo_path = NULL;
658 	size_t i;
659 	struct rlimit rl;
660 
661 	*repop = NULL;
662 
663 	if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
664 		return got_error_from_errno("getrlimit");
665 
666 	repo = calloc(1, sizeof(*repo));
667 	if (repo == NULL) {
668 		err = got_error_from_errno("calloc");
669 		goto done;
670 	}
671 
672 	RB_INIT(&repo->packidx_bloom_filters);
673 
674 	for (i = 0; i < nitems(repo->privsep_children); i++) {
675 		memset(&repo->privsep_children[i], 0,
676 		    sizeof(repo->privsep_children[0]));
677 		repo->privsep_children[i].imsg_fd = -1;
678 	}
679 
680 	err = got_object_cache_init(&repo->objcache,
681 	    GOT_OBJECT_CACHE_TYPE_OBJ);
682 	if (err)
683 		goto done;
684 	err = got_object_cache_init(&repo->treecache,
685 	    GOT_OBJECT_CACHE_TYPE_TREE);
686 	if (err)
687 		goto done;
688 	err = got_object_cache_init(&repo->commitcache,
689 	    GOT_OBJECT_CACHE_TYPE_COMMIT);
690 	if (err)
691 		goto done;
692 	err = got_object_cache_init(&repo->tagcache,
693 	    GOT_OBJECT_CACHE_TYPE_TAG);
694 	if (err)
695 		goto done;
696 	err = got_object_cache_init(&repo->rawcache,
697 	    GOT_OBJECT_CACHE_TYPE_RAW);
698 	if (err)
699 		goto done;
700 
701 	repo->pack_cache_size = GOT_PACK_CACHE_SIZE;
702 	if (repo->pack_cache_size > rl.rlim_cur / 8)
703 		repo->pack_cache_size = rl.rlim_cur / 8;
704 
705 	repo_path = realpath(path, NULL);
706 	if (repo_path == NULL) {
707 		err = got_error_from_errno2("realpath", path);
708 		goto done;
709 	}
710 
711 	for (;;) {
712 		char *parent_path;
713 
714 		err = open_repo(repo, repo_path);
715 		if (err == NULL)
716 			break;
717 		if (err->code != GOT_ERR_NOT_GIT_REPO)
718 			goto done;
719 		if (repo_path[0] == '/' && repo_path[1] == '\0') {
720 			err = got_error(GOT_ERR_NOT_GIT_REPO);
721 			goto done;
722 		}
723 		err = got_path_dirname(&parent_path, repo_path);
724 		if (err)
725 			goto done;
726 		free(repo_path);
727 		repo_path = parent_path;
728 	}
729 
730 	err = read_gotconfig(repo);
731 	if (err)
732 		goto done;
733 
734 	err = read_gitconfig(repo, global_gitconfig_path);
735 	if (err)
736 		goto done;
737 	if (repo->gitconfig_repository_format_version != 0)
738 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
739 	for (i = 0; i < repo->nextensions; i++) {
740 		char *ext = repo->extensions[i];
741 		int j, supported = 0;
742 		for (j = 0; j < nitems(repo_extensions); j++) {
743 			if (strcmp(ext, repo_extensions[j]) == 0) {
744 				supported = 1;
745 				break;
746 			}
747 		}
748 		if (!supported) {
749 			err = got_error_path(ext, GOT_ERR_GIT_REPO_EXT);
750 			goto done;
751 		}
752 	}
753 done:
754 	if (err)
755 		got_repo_close(repo);
756 	else
757 		*repop = repo;
758 	free(repo_path);
759 	return err;
760 }
761 
762 const struct got_error *
763 got_repo_close(struct got_repository *repo)
764 {
765 	const struct got_error *err = NULL, *child_err;
766 	struct got_packidx_bloom_filter *bf;
767 	size_t i;
768 
769 	for (i = 0; i < repo->pack_cache_size; i++) {
770 		if (repo->packidx_cache[i] == NULL)
771 			break;
772 		got_packidx_close(repo->packidx_cache[i]);
773 	}
774 
775 	while ((bf = RB_MIN(got_packidx_bloom_filter_tree,
776 	    &repo->packidx_bloom_filters))) {
777 		RB_REMOVE(got_packidx_bloom_filter_tree,
778 		    &repo->packidx_bloom_filters, bf);
779 		free(bf->bloom);
780 		free(bf);
781 	}
782 
783 	for (i = 0; i < repo->pack_cache_size; i++) {
784 		if (repo->packs[i].path_packfile == NULL)
785 			break;
786 		got_pack_close(&repo->packs[i]);
787 	}
788 
789 	free(repo->path);
790 	free(repo->path_git_dir);
791 
792 	got_object_cache_close(&repo->objcache);
793 	got_object_cache_close(&repo->treecache);
794 	got_object_cache_close(&repo->commitcache);
795 	got_object_cache_close(&repo->tagcache);
796 	got_object_cache_close(&repo->rawcache);
797 
798 	for (i = 0; i < nitems(repo->privsep_children); i++) {
799 		if (repo->privsep_children[i].imsg_fd == -1)
800 			continue;
801 		imsg_clear(repo->privsep_children[i].ibuf);
802 		free(repo->privsep_children[i].ibuf);
803 		err = got_privsep_send_stop(repo->privsep_children[i].imsg_fd);
804 		child_err = got_privsep_wait_for_child(
805 		    repo->privsep_children[i].pid);
806 		if (child_err && err == NULL)
807 			err = child_err;
808 		if (close(repo->privsep_children[i].imsg_fd) == -1 &&
809 		    err == NULL)
810 			err = got_error_from_errno("close");
811 	}
812 
813 	if (repo->gitdir_fd != -1 && close(repo->gitdir_fd) == -1 &&
814 	    err == NULL)
815 		err = got_error_from_errno("close");
816 
817 	if (repo->gotconfig)
818 		got_gotconfig_free(repo->gotconfig);
819 	free(repo->gitconfig_author_name);
820 	free(repo->gitconfig_author_email);
821 	for (i = 0; i < repo->ngitconfig_remotes; i++)
822 		got_repo_free_remote_repo_data(&repo->gitconfig_remotes[i]);
823 	free(repo->gitconfig_remotes);
824 	for (i = 0; i < repo->nextensions; i++)
825 		free(repo->extensions[i]);
826 	free(repo->extensions);
827 	free(repo);
828 
829 	return err;
830 }
831 
832 void
833 got_repo_free_remote_repo_data(struct got_remote_repo *repo)
834 {
835 	int i;
836 
837 	free(repo->name);
838 	repo->name = NULL;
839 	free(repo->fetch_url);
840 	repo->fetch_url = NULL;
841 	free(repo->send_url);
842 	repo->send_url = NULL;
843 	for (i = 0; i < repo->nfetch_branches; i++)
844 		free(repo->fetch_branches[i]);
845 	free(repo->fetch_branches);
846 	repo->fetch_branches = NULL;
847 	repo->nfetch_branches = 0;
848 	for (i = 0; i < repo->nsend_branches; i++)
849 		free(repo->send_branches[i]);
850 	free(repo->send_branches);
851 	repo->send_branches = NULL;
852 	repo->nsend_branches = 0;
853 }
854 
855 const struct got_error *
856 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
857     const char *input_path)
858 {
859 	const struct got_error *err = NULL;
860 	const char *repo_abspath = NULL;
861 	size_t repolen, len;
862 	char *canonpath, *path = NULL;
863 
864 	*in_repo_path = NULL;
865 
866 	canonpath = strdup(input_path);
867 	if (canonpath == NULL) {
868 		err = got_error_from_errno("strdup");
869 		goto done;
870 	}
871 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
872 	if (err)
873 		goto done;
874 
875 	repo_abspath = got_repo_get_path(repo);
876 
877 	if (canonpath[0] == '\0') {
878 		path = strdup(canonpath);
879 		if (path == NULL) {
880 			err = got_error_from_errno("strdup");
881 			goto done;
882 		}
883 	} else {
884 		path = realpath(canonpath, NULL);
885 		if (path == NULL) {
886 			if (errno != ENOENT) {
887 				err = got_error_from_errno2("realpath",
888 				    canonpath);
889 				goto done;
890 			}
891 			/*
892 			 * Path is not on disk.
893 			 * Assume it is already relative to repository root.
894 			 */
895 			path = strdup(canonpath);
896 			if (path == NULL) {
897 				err = got_error_from_errno("strdup");
898 				goto done;
899 			}
900 		}
901 
902 		repolen = strlen(repo_abspath);
903 		len = strlen(path);
904 
905 
906 		if (strcmp(path, repo_abspath) == 0) {
907 			free(path);
908 			path = strdup("");
909 			if (path == NULL) {
910 				err = got_error_from_errno("strdup");
911 				goto done;
912 			}
913 		} else if (len > repolen &&
914 		    got_path_is_child(path, repo_abspath, repolen)) {
915 			/* Matched an on-disk path inside repository. */
916 			if (got_repo_is_bare(repo)) {
917 				/*
918 				 * Matched an on-disk path inside repository
919 				 * database. Treat input as repository-relative.
920 				 */
921 				free(path);
922 				path = canonpath;
923 				canonpath = NULL;
924 			} else {
925 				char *child;
926 				/* Strip common prefix with repository path. */
927 				err = got_path_skip_common_ancestor(&child,
928 				    repo_abspath, path);
929 				if (err)
930 					goto done;
931 				free(path);
932 				path = child;
933 			}
934 		} else {
935 			/*
936 			 * Matched unrelated on-disk path.
937 			 * Treat input as repository-relative.
938 			 */
939 			free(path);
940 			path = canonpath;
941 			canonpath = NULL;
942 		}
943 	}
944 
945 	/* Make in-repository path absolute */
946 	if (path[0] != '/') {
947 		char *abspath;
948 		if (asprintf(&abspath, "/%s", path) == -1) {
949 			err = got_error_from_errno("asprintf");
950 			goto done;
951 		}
952 		free(path);
953 		path = abspath;
954 	}
955 
956 done:
957 	free(canonpath);
958 	if (err)
959 		free(path);
960 	else
961 		*in_repo_path = path;
962 	return err;
963 }
964 
965 static const struct got_error *
966 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
967     const char *path_packidx)
968 {
969 	const struct got_error *err = NULL;
970 	size_t i;
971 
972 	for (i = 0; i < repo->pack_cache_size; i++) {
973 		if (repo->packidx_cache[i] == NULL)
974 			break;
975 		if (strcmp(repo->packidx_cache[i]->path_packidx,
976 		    path_packidx) == 0) {
977 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
978 		}
979 	}
980 	if (i == repo->pack_cache_size) {
981 		i = repo->pack_cache_size - 1;
982 		err = got_packidx_close(repo->packidx_cache[i]);
983 		if (err)
984 			return err;
985 	}
986 
987 	repo->packidx_cache[i] = packidx;
988 
989 	return NULL;
990 }
991 
992 int
993 got_repo_is_packidx_filename(const char *name, size_t len)
994 {
995 	if (len != GOT_PACKIDX_NAMELEN)
996 		return 0;
997 
998 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
999 		return 0;
1000 
1001 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
1002 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
1003 		return 0;
1004 
1005 	return 1;
1006 }
1007 
1008 static struct got_packidx_bloom_filter *
1009 get_packidx_bloom_filter(struct got_repository *repo,
1010     const char *path, size_t path_len)
1011 {
1012 	struct got_packidx_bloom_filter key;
1013 
1014 	if (strlcpy(key.path, path, sizeof(key.path)) >= sizeof(key.path))
1015 		return NULL; /* XXX */
1016 	key.path_len = path_len;
1017 
1018 	return RB_FIND(got_packidx_bloom_filter_tree,
1019 	    &repo->packidx_bloom_filters, &key);
1020 }
1021 
1022 int
1023 got_repo_check_packidx_bloom_filter(struct got_repository *repo,
1024     const char *path_packidx, struct got_object_id *id)
1025 {
1026 	struct got_packidx_bloom_filter *bf;
1027 
1028 	bf = get_packidx_bloom_filter(repo, path_packidx, strlen(path_packidx));
1029 	if (bf)
1030 		return bloom_check(bf->bloom, id->sha1, sizeof(id->sha1));
1031 
1032 	/* No bloom filter means this pack index must be searched. */
1033 	return 1;
1034 }
1035 
1036 static const struct got_error *
1037 add_packidx_bloom_filter(struct got_repository *repo,
1038     struct got_packidx *packidx, const char *path_packidx)
1039 {
1040 	int i, nobjects = be32toh(packidx->hdr.fanout_table[0xff]);
1041 	struct got_packidx_bloom_filter *bf;
1042 	size_t len;
1043 
1044 	/*
1045 	 * Don't use bloom filters for very large pack index files.
1046 	 * Large pack files will contain a relatively large fraction
1047 	 * of our objects so we will likely need to visit them anyway.
1048 	 * The more objects a pack file contains the higher the probability
1049 	 * of a false-positive match from the bloom filter. And reading
1050 	 * all object IDs from a large pack index file can be expensive.
1051 	 */
1052 	if (nobjects > 100000) /* cut-off at about 2MB, at 20 bytes per ID */
1053 		return NULL;
1054 
1055 	/* Do we already have a filter for this pack index? */
1056 	if (get_packidx_bloom_filter(repo, path_packidx,
1057 	    strlen(path_packidx)) != NULL)
1058 		return NULL;
1059 
1060 	bf = calloc(1, sizeof(*bf));
1061 	if (bf == NULL)
1062 		return got_error_from_errno("calloc");
1063 	bf->bloom = calloc(1, sizeof(*bf->bloom));
1064 	if (bf->bloom == NULL) {
1065 		free(bf);
1066 		return got_error_from_errno("calloc");
1067 	}
1068 	
1069 	len = strlcpy(bf->path, path_packidx, sizeof(bf->path));
1070 	if (len >= sizeof(bf->path)) {
1071 		free(bf->bloom);
1072 		free(bf);
1073 		return got_error(GOT_ERR_NO_SPACE);
1074 	}
1075 	bf->path_len = len;
1076 
1077 	/* Minimum size supported by our bloom filter is 1000 entries. */
1078 	bloom_init(bf->bloom, nobjects < 1000 ? 1000 : nobjects, 0.1);
1079 	for (i = 0; i < nobjects; i++) {
1080 		struct got_packidx_object_id *id;
1081 		id = &packidx->hdr.sorted_ids[i];
1082 		bloom_add(bf->bloom, id->sha1, sizeof(id->sha1));
1083 	}
1084 
1085 	RB_INSERT(got_packidx_bloom_filter_tree,
1086 	    &repo->packidx_bloom_filters, bf);
1087 	return NULL;
1088 }
1089 
1090 const struct got_error *
1091 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
1092     struct got_repository *repo, struct got_object_id *id)
1093 {
1094 	const struct got_error *err;
1095 	DIR *packdir = NULL;
1096 	struct dirent *dent;
1097 	char *path_packidx;
1098 	size_t i;
1099 	int packdir_fd;
1100 
1101 	/* Search pack index cache. */
1102 	for (i = 0; i < repo->pack_cache_size; i++) {
1103 		if (repo->packidx_cache[i] == NULL)
1104 			break;
1105 		if (!got_repo_check_packidx_bloom_filter(repo,
1106 		    repo->packidx_cache[i]->path_packidx, id))
1107 			continue; /* object will not be found in this index */
1108 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
1109 		if (*idx != -1) {
1110 			*packidx = repo->packidx_cache[i];
1111 			/*
1112 			 * Move this cache entry to the front. Repeatedly
1113 			 * searching a wrong pack index can be expensive.
1114 			 */
1115 			if (i > 0) {
1116 				memmove(&repo->packidx_cache[1],
1117 				    &repo->packidx_cache[0],
1118 				    i * sizeof(repo->packidx_cache[0]));
1119 				repo->packidx_cache[0] = *packidx;
1120 			}
1121 			return NULL;
1122 		}
1123 	}
1124 	/* No luck. Search the filesystem. */
1125 
1126 	packdir_fd = openat(got_repo_get_fd(repo),
1127 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY | O_CLOEXEC);
1128 	if (packdir_fd == -1) {
1129 		if (errno == ENOENT)
1130 			err = got_error_no_obj(id);
1131 		else
1132 			err = got_error_from_errno_fmt("openat: %s/%s",
1133 			    got_repo_get_path_git_dir(repo),
1134 			    GOT_OBJECTS_PACK_DIR);
1135 		goto done;
1136 	}
1137 
1138 	packdir = fdopendir(packdir_fd);
1139 	if (packdir == NULL) {
1140 		err = got_error_from_errno("fdopendir");
1141 		goto done;
1142 	}
1143 
1144 	while ((dent = readdir(packdir)) != NULL) {
1145 		int is_cached = 0;
1146 
1147 		if (!got_repo_is_packidx_filename(dent->d_name, dent->d_namlen))
1148 			continue;
1149 
1150 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1151 		    dent->d_name) == -1) {
1152 			err = got_error_from_errno("asprintf");
1153 			goto done;
1154 		}
1155 
1156 		if (!got_repo_check_packidx_bloom_filter(repo,
1157 		    path_packidx, id)) {
1158 			free(path_packidx);
1159 			continue; /* object will not be found in this index */
1160 		}
1161 
1162 		for (i = 0; i < repo->pack_cache_size; i++) {
1163 			if (repo->packidx_cache[i] == NULL)
1164 				break;
1165 			if (strcmp(repo->packidx_cache[i]->path_packidx,
1166 			    path_packidx) == 0) {
1167 				is_cached = 1;
1168 				break;
1169 			}
1170 		}
1171 		if (is_cached) {
1172 			free(path_packidx);
1173 			continue; /* already searched */
1174 		}
1175 
1176 		err = got_packidx_open(packidx, got_repo_get_fd(repo),
1177 		    path_packidx, 0);
1178 		if (err) {
1179 			free(path_packidx);
1180 			goto done;
1181 		}
1182 
1183 		err = add_packidx_bloom_filter(repo, *packidx, path_packidx);
1184 		if (err) {
1185 			free(path_packidx);
1186 			goto done;
1187 		}
1188 
1189 		err = cache_packidx(repo, *packidx, path_packidx);
1190 		free(path_packidx);
1191 		if (err)
1192 			goto done;
1193 
1194 		*idx = got_packidx_get_object_idx(*packidx, id);
1195 		if (*idx != -1) {
1196 			err = NULL; /* found the object */
1197 			goto done;
1198 		}
1199 	}
1200 
1201 	err = got_error_no_obj(id);
1202 done:
1203 	if (packdir && closedir(packdir) != 0 && err == NULL)
1204 		err = got_error_from_errno("closedir");
1205 	return err;
1206 }
1207 
1208 const struct got_error *
1209 got_repo_list_packidx(struct got_pathlist_head *packidx_paths,
1210     struct got_repository *repo)
1211 {
1212 	const struct got_error *err = NULL;
1213 	DIR *packdir = NULL;
1214 	struct dirent *dent;
1215 	char *path_packidx = NULL;
1216 	int packdir_fd;
1217 
1218 	packdir_fd = openat(got_repo_get_fd(repo),
1219 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY | O_CLOEXEC);
1220 	if (packdir_fd == -1) {
1221 		return got_error_from_errno_fmt("openat: %s/%s",
1222 		    got_repo_get_path_git_dir(repo),
1223 		    GOT_OBJECTS_PACK_DIR);
1224 	}
1225 
1226 	packdir = fdopendir(packdir_fd);
1227 	if (packdir == NULL) {
1228 		err = got_error_from_errno("fdopendir");
1229 		goto done;
1230 	}
1231 
1232 	while ((dent = readdir(packdir)) != NULL) {
1233 		if (!got_repo_is_packidx_filename(dent->d_name, dent->d_namlen))
1234 			continue;
1235 
1236 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1237 		    dent->d_name) == -1) {
1238 			err = got_error_from_errno("asprintf");
1239 			path_packidx = NULL;
1240 			break;
1241 		}
1242 
1243 		err = got_pathlist_append(packidx_paths, path_packidx, NULL);
1244 		if (err)
1245 			break;
1246 	}
1247 done:
1248 	if (err)
1249 		free(path_packidx);
1250 	if (packdir && closedir(packdir) != 0 && err == NULL)
1251 		err = got_error_from_errno("closedir");
1252 	return err;
1253 }
1254 
1255 const struct got_error *
1256 got_repo_get_packidx(struct got_packidx **packidx, const char *path_packidx,
1257     struct got_repository *repo)
1258 {
1259 	const struct got_error *err;
1260 	size_t i;
1261 
1262 	*packidx = NULL;
1263 
1264 	/* Search pack index cache. */
1265 	for (i = 0; i < repo->pack_cache_size; i++) {
1266 		if (repo->packidx_cache[i] == NULL)
1267 			break;
1268 		if (strcmp(repo->packidx_cache[i]->path_packidx,
1269 		    path_packidx) == 0) {
1270 			*packidx = repo->packidx_cache[i];
1271 			return NULL;
1272 		}
1273 	}
1274 	/* No luck. Search the filesystem. */
1275 
1276 	err = got_packidx_open(packidx, got_repo_get_fd(repo),
1277 	    path_packidx, 0);
1278 	if (err)
1279 		return err;
1280 
1281 	err = add_packidx_bloom_filter(repo, *packidx, path_packidx);
1282 	if (err)
1283 		goto done;
1284 
1285 	err = cache_packidx(repo, *packidx, path_packidx);
1286 done:
1287 	if (err) {
1288 		got_packidx_close(*packidx);
1289 		*packidx = NULL;
1290 	}
1291 	return err;
1292 }
1293 
1294 static const struct got_error *
1295 read_packfile_hdr(int fd, struct got_packidx *packidx)
1296 {
1297 	const struct got_error *err = NULL;
1298 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
1299 	struct got_packfile_hdr hdr;
1300 	ssize_t n;
1301 
1302 	n = read(fd, &hdr, sizeof(hdr));
1303 	if (n < 0)
1304 		return got_error_from_errno("read");
1305 	if (n != sizeof(hdr))
1306 		return got_error(GOT_ERR_BAD_PACKFILE);
1307 
1308 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
1309 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
1310 	    be32toh(hdr.nobjects) != totobj)
1311 		err = got_error(GOT_ERR_BAD_PACKFILE);
1312 
1313 	return err;
1314 }
1315 
1316 static const struct got_error *
1317 open_packfile(int *fd, struct got_repository *repo,
1318     const char *relpath, struct got_packidx *packidx)
1319 {
1320 	const struct got_error *err = NULL;
1321 
1322 	*fd = openat(got_repo_get_fd(repo), relpath,
1323 	    O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
1324 	if (*fd == -1)
1325 		return got_error_from_errno_fmt("openat: %s/%s",
1326 		    got_repo_get_path_git_dir(repo), relpath);
1327 
1328 	if (packidx) {
1329 		err = read_packfile_hdr(*fd, packidx);
1330 		if (err) {
1331 			close(*fd);
1332 			*fd = -1;
1333 		}
1334 	}
1335 
1336 	return err;
1337 }
1338 
1339 const struct got_error *
1340 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
1341     const char *path_packfile, struct got_packidx *packidx)
1342 {
1343 	const struct got_error *err = NULL;
1344 	struct got_pack *pack = NULL;
1345 	struct stat sb;
1346 	size_t i;
1347 
1348 	if (packp)
1349 		*packp = NULL;
1350 
1351 	for (i = 0; i < repo->pack_cache_size; i++) {
1352 		pack = &repo->packs[i];
1353 		if (pack->path_packfile == NULL)
1354 			break;
1355 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1356 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1357 	}
1358 
1359 	if (i == repo->pack_cache_size) {
1360 		err = got_pack_close(&repo->packs[i - 1]);
1361 		if (err)
1362 			return err;
1363 		memmove(&repo->packs[1], &repo->packs[0],
1364 		    sizeof(repo->packs) - sizeof(repo->packs[0]));
1365 		i = 0;
1366 	}
1367 
1368 	pack = &repo->packs[i];
1369 
1370 	pack->path_packfile = strdup(path_packfile);
1371 	if (pack->path_packfile == NULL) {
1372 		err = got_error_from_errno("strdup");
1373 		goto done;
1374 	}
1375 
1376 	err = open_packfile(&pack->fd, repo, path_packfile, packidx);
1377 	if (err)
1378 		goto done;
1379 
1380 	if (fstat(pack->fd, &sb) != 0) {
1381 		err = got_error_from_errno("fstat");
1382 		goto done;
1383 	}
1384 	pack->filesize = sb.st_size;
1385 
1386 	pack->privsep_child = NULL;
1387 
1388 #ifndef GOT_PACK_NO_MMAP
1389 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1390 	    pack->fd, 0);
1391 	if (pack->map == MAP_FAILED) {
1392 		if (errno != ENOMEM) {
1393 			err = got_error_from_errno("mmap");
1394 			goto done;
1395 		}
1396 		pack->map = NULL; /* fall back to read(2) */
1397 	}
1398 #endif
1399 done:
1400 	if (err) {
1401 		if (pack) {
1402 			free(pack->path_packfile);
1403 			memset(pack, 0, sizeof(*pack));
1404 		}
1405 	} else if (packp)
1406 		*packp = pack;
1407 	return err;
1408 }
1409 
1410 struct got_pack *
1411 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1412 {
1413 	struct got_pack *pack = NULL;
1414 	size_t i;
1415 
1416 	for (i = 0; i < repo->pack_cache_size; i++) {
1417 		pack = &repo->packs[i];
1418 		if (pack->path_packfile == NULL)
1419 			break;
1420 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1421 			return pack;
1422 	}
1423 
1424 	return NULL;
1425 }
1426 
1427 const struct got_error *
1428 got_repo_init(const char *repo_path)
1429 {
1430 	const struct got_error *err = NULL;
1431 	const char *dirnames[] = {
1432 		GOT_OBJECTS_DIR,
1433 		GOT_OBJECTS_PACK_DIR,
1434 		GOT_REFS_DIR,
1435 	};
1436 	const char *description_str = "Unnamed repository; "
1437 	    "edit this file 'description' to name the repository.";
1438 	const char *headref_str = "ref: refs/heads/main";
1439 	const char *gitconfig_str = "[core]\n"
1440 	    "\trepositoryformatversion = 0\n"
1441 	    "\tfilemode = true\n"
1442 	    "\tbare = true\n";
1443 	char *path;
1444 	size_t i;
1445 
1446 	if (!got_path_dir_is_empty(repo_path))
1447 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1448 
1449 	for (i = 0; i < nitems(dirnames); i++) {
1450 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1451 			return got_error_from_errno("asprintf");
1452 		}
1453 		err = got_path_mkdir(path);
1454 		free(path);
1455 		if (err)
1456 			return err;
1457 	}
1458 
1459 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1460 		return got_error_from_errno("asprintf");
1461 	err = got_path_create_file(path, description_str);
1462 	free(path);
1463 	if (err)
1464 		return err;
1465 
1466 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1467 		return got_error_from_errno("asprintf");
1468 	err = got_path_create_file(path, headref_str);
1469 	free(path);
1470 	if (err)
1471 		return err;
1472 
1473 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1474 		return got_error_from_errno("asprintf");
1475 	err = got_path_create_file(path, gitconfig_str);
1476 	free(path);
1477 	if (err)
1478 		return err;
1479 
1480 	return NULL;
1481 }
1482 
1483 static const struct got_error *
1484 match_packed_object(struct got_object_id **unique_id,
1485     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1486 {
1487 	const struct got_error *err = NULL;
1488 	DIR *packdir = NULL;
1489 	struct dirent *dent;
1490 	char *path_packidx;
1491 	struct got_object_id_queue matched_ids;
1492 	int packdir_fd;
1493 
1494 	STAILQ_INIT(&matched_ids);
1495 
1496 	packdir_fd = openat(got_repo_get_fd(repo),
1497 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY | O_CLOEXEC);
1498 	if (packdir_fd == -1) {
1499 		if (errno != ENOENT) {
1500 			err = got_error_from_errno2("openat",
1501 			    GOT_OBJECTS_PACK_DIR);
1502 		}
1503 		goto done;
1504 	}
1505 
1506 	packdir = fdopendir(packdir_fd);
1507 	if (packdir == NULL) {
1508 		err = got_error_from_errno("fdopendir");
1509 		goto done;
1510 	}
1511 
1512 	while ((dent = readdir(packdir)) != NULL) {
1513 		struct got_packidx *packidx;
1514 		struct got_object_qid *qid;
1515 
1516 		if (!got_repo_is_packidx_filename(dent->d_name, dent->d_namlen))
1517 			continue;
1518 
1519 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1520 		    dent->d_name) == -1) {
1521 			err = got_error_from_errno("strdup");
1522 			break;
1523 		}
1524 
1525 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1526 		    path_packidx, 0);
1527 		free(path_packidx);
1528 		if (err)
1529 			break;
1530 
1531 		err = got_packidx_match_id_str_prefix(&matched_ids,
1532 		    packidx, id_str_prefix);
1533 		if (err) {
1534 			got_packidx_close(packidx);
1535 			break;
1536 		}
1537 		err = got_packidx_close(packidx);
1538 		if (err)
1539 			break;
1540 
1541 		STAILQ_FOREACH(qid, &matched_ids, entry) {
1542 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1543 				int matched_type;
1544 				err = got_object_get_type(&matched_type, repo,
1545 				    qid->id);
1546 				if (err)
1547 					goto done;
1548 				if (matched_type != obj_type)
1549 					continue;
1550 			}
1551 			if (*unique_id == NULL) {
1552 				*unique_id = got_object_id_dup(qid->id);
1553 				if (*unique_id == NULL) {
1554 					err = got_error_from_errno("malloc");
1555 					goto done;
1556 				}
1557 			} else {
1558 				if (got_object_id_cmp(*unique_id, qid->id) == 0)
1559 					continue; /* packed multiple times */
1560 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1561 				goto done;
1562 			}
1563 		}
1564 	}
1565 done:
1566 	got_object_id_queue_free(&matched_ids);
1567 	if (packdir && closedir(packdir) != 0 && err == NULL)
1568 		err = got_error_from_errno("closedir");
1569 	if (err) {
1570 		free(*unique_id);
1571 		*unique_id = NULL;
1572 	}
1573 	return err;
1574 }
1575 
1576 static const struct got_error *
1577 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1578     const char *object_dir, const char *id_str_prefix, int obj_type,
1579     struct got_repository *repo)
1580 {
1581 	const struct got_error *err = NULL;
1582 	char *path;
1583 	DIR *dir = NULL;
1584 	struct dirent *dent;
1585 	struct got_object_id id;
1586 
1587 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1588 		err = got_error_from_errno("asprintf");
1589 		goto done;
1590 	}
1591 
1592 	dir = opendir(path);
1593 	if (dir == NULL) {
1594 		if (errno == ENOENT) {
1595 			err = NULL;
1596 			goto done;
1597 		}
1598 		err = got_error_from_errno2("opendir", path);
1599 		goto done;
1600 	}
1601 	while ((dent = readdir(dir)) != NULL) {
1602 		char *id_str;
1603 		int cmp;
1604 
1605 		if (strcmp(dent->d_name, ".") == 0 ||
1606 		    strcmp(dent->d_name, "..") == 0)
1607 			continue;
1608 
1609 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1610 			err = got_error_from_errno("asprintf");
1611 			goto done;
1612 		}
1613 
1614 		if (!got_parse_sha1_digest(id.sha1, id_str))
1615 			continue;
1616 
1617 		/*
1618 		 * Directory entries do not necessarily appear in
1619 		 * sorted order, so we must iterate over all of them.
1620 		 */
1621 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1622 		if (cmp != 0) {
1623 			free(id_str);
1624 			continue;
1625 		}
1626 
1627 		if (*unique_id == NULL) {
1628 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1629 				int matched_type;
1630 				err = got_object_get_type(&matched_type, repo,
1631 				    &id);
1632 				if (err)
1633 					goto done;
1634 				if (matched_type != obj_type)
1635 					continue;
1636 			}
1637 			*unique_id = got_object_id_dup(&id);
1638 			if (*unique_id == NULL) {
1639 				err = got_error_from_errno("got_object_id_dup");
1640 				free(id_str);
1641 				goto done;
1642 			}
1643 		} else {
1644 			if (got_object_id_cmp(*unique_id, &id) == 0)
1645 				continue; /* both packed and loose */
1646 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1647 			free(id_str);
1648 			goto done;
1649 		}
1650 	}
1651 done:
1652 	if (dir && closedir(dir) != 0 && err == NULL)
1653 		err = got_error_from_errno("closedir");
1654 	if (err) {
1655 		free(*unique_id);
1656 		*unique_id = NULL;
1657 	}
1658 	free(path);
1659 	return err;
1660 }
1661 
1662 const struct got_error *
1663 got_repo_match_object_id_prefix(struct got_object_id **id,
1664     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1665 {
1666 	const struct got_error *err = NULL;
1667 	char *path_objects = got_repo_get_path_objects(repo);
1668 	char *object_dir = NULL;
1669 	size_t len;
1670 	int i;
1671 
1672 	*id = NULL;
1673 
1674 	for (i = 0; i < strlen(id_str_prefix); i++) {
1675 		if (isxdigit((unsigned char)id_str_prefix[i]))
1676 			continue;
1677 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1678 	}
1679 
1680 	len = strlen(id_str_prefix);
1681 	if (len >= 2) {
1682 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1683 		if (err)
1684 			goto done;
1685 		object_dir = strndup(id_str_prefix, 2);
1686 		if (object_dir == NULL) {
1687 			err = got_error_from_errno("strdup");
1688 			goto done;
1689 		}
1690 		err = match_loose_object(id, path_objects, object_dir,
1691 		    id_str_prefix, obj_type, repo);
1692 	} else if (len == 1) {
1693 		int i;
1694 		for (i = 0; i < 0xf; i++) {
1695 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1696 			    == -1) {
1697 				err = got_error_from_errno("asprintf");
1698 				goto done;
1699 			}
1700 			err = match_packed_object(id, repo, object_dir,
1701 			    obj_type);
1702 			if (err)
1703 				goto done;
1704 			err = match_loose_object(id, path_objects, object_dir,
1705 			    id_str_prefix, obj_type, repo);
1706 			if (err)
1707 				goto done;
1708 		}
1709 	} else {
1710 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1711 		goto done;
1712 	}
1713 done:
1714 	free(object_dir);
1715 	if (err) {
1716 		free(*id);
1717 		*id = NULL;
1718 	} else if (*id == NULL) {
1719 		switch (obj_type) {
1720 		case GOT_OBJ_TYPE_BLOB:
1721 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1722 			    GOT_OBJ_LABEL_BLOB, id_str_prefix);
1723 			break;
1724 		case GOT_OBJ_TYPE_TREE:
1725 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1726 			    GOT_OBJ_LABEL_TREE, id_str_prefix);
1727 			break;
1728 		case GOT_OBJ_TYPE_COMMIT:
1729 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1730 			    GOT_OBJ_LABEL_COMMIT, id_str_prefix);
1731 			break;
1732 		case GOT_OBJ_TYPE_TAG:
1733 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1734 			    GOT_OBJ_LABEL_TAG, id_str_prefix);
1735 			break;
1736 		default:
1737 			err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1738 			break;
1739 		}
1740 	}
1741 
1742 	return err;
1743 }
1744 
1745 const struct got_error *
1746 got_repo_match_object_id(struct got_object_id **id, char **label,
1747     const char *id_str, int obj_type, struct got_reflist_head *refs,
1748     struct got_repository *repo)
1749 {
1750 	const struct got_error *err;
1751 	struct got_tag_object *tag;
1752 	struct got_reference *ref = NULL;
1753 
1754 	*id = NULL;
1755 	if (label)
1756 		*label = NULL;
1757 
1758 	if (refs) {
1759 		err = got_repo_object_match_tag(&tag, id_str, obj_type,
1760 		    refs, repo);
1761 		if (err == NULL) {
1762 			*id = got_object_id_dup(
1763 			    got_object_tag_get_object_id(tag));
1764 			if (*id == NULL)
1765 				err = got_error_from_errno("got_object_id_dup");
1766 			else if (label && asprintf(label, "refs/tags/%s",
1767 			    got_object_tag_get_name(tag)) == -1) {
1768 				err = got_error_from_errno("asprintf");
1769 				free(*id);
1770 				*id = NULL;
1771 			}
1772 			got_object_tag_close(tag);
1773 			return err;
1774 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1775 		    err->code != GOT_ERR_NO_OBJ)
1776 			return err;
1777 	}
1778 
1779 	err = got_repo_match_object_id_prefix(id, id_str, obj_type, repo);
1780 	if (err) {
1781 		if (err->code != GOT_ERR_BAD_OBJ_ID_STR)
1782 			return err;
1783 		err = got_ref_open(&ref, repo, id_str, 0);
1784 		if (err != NULL)
1785 			goto done;
1786 		if (label) {
1787 			*label = strdup(got_ref_get_name(ref));
1788 			if (*label == NULL) {
1789 				err = got_error_from_errno("strdup");
1790 				goto done;
1791 			}
1792 		}
1793 		err = got_ref_resolve(id, repo, ref);
1794 	} else if (label) {
1795 		err = got_object_id_str(label, *id);
1796 		if (*label == NULL) {
1797 			err = got_error_from_errno("strdup");
1798 			goto done;
1799 		}
1800 	}
1801 done:
1802 	if (ref)
1803 		got_ref_close(ref);
1804 	return err;
1805 }
1806 
1807 const struct got_error *
1808 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1809     int obj_type, struct got_reflist_head *refs, struct got_repository *repo)
1810 {
1811 	const struct got_error *err = NULL;
1812 	struct got_reflist_entry *re;
1813 	struct got_object_id *tag_id;
1814 	int name_is_absolute = (strncmp(name, "refs/", 5) == 0);
1815 
1816 	*tag = NULL;
1817 
1818 	TAILQ_FOREACH(re, refs, entry) {
1819 		const char *refname;
1820 		refname = got_ref_get_name(re->ref);
1821 		if (got_ref_is_symbolic(re->ref))
1822 			continue;
1823 		if (strncmp(refname, "refs/tags/", 10) != 0)
1824 			continue;
1825 		if (!name_is_absolute)
1826 			refname += strlen("refs/tags/");
1827 		if (strcmp(refname, name) != 0)
1828 			continue;
1829 		err = got_ref_resolve(&tag_id, repo, re->ref);
1830 		if (err)
1831 			break;
1832 		err = got_object_open_as_tag(tag, repo, tag_id);
1833 		free(tag_id);
1834 		if (err)
1835 			break;
1836 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1837 		    got_object_tag_get_object_type(*tag) == obj_type)
1838 			break;
1839 		got_object_tag_close(*tag);
1840 		*tag = NULL;
1841 	}
1842 
1843 	if (err == NULL && *tag == NULL)
1844 		err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1845 		    GOT_OBJ_LABEL_TAG, name);
1846 	return err;
1847 }
1848 
1849 static const struct got_error *
1850 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1851     const char *name, mode_t mode, struct got_object_id *blob_id)
1852 {
1853 	const struct got_error *err = NULL;
1854 
1855 	 *new_te = NULL;
1856 
1857 	*new_te = calloc(1, sizeof(**new_te));
1858 	if (*new_te == NULL)
1859 		return got_error_from_errno("calloc");
1860 
1861 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
1862 	    sizeof((*new_te)->name)) {
1863 		err = got_error(GOT_ERR_NO_SPACE);
1864 		goto done;
1865 	}
1866 
1867 	if (S_ISLNK(mode)) {
1868 		(*new_te)->mode = S_IFLNK;
1869 	} else {
1870 		(*new_te)->mode = S_IFREG;
1871 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
1872 	}
1873 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
1874 done:
1875 	if (err && *new_te) {
1876 		free(*new_te);
1877 		*new_te = NULL;
1878 	}
1879 	return err;
1880 }
1881 
1882 static const struct got_error *
1883 import_file(struct got_tree_entry **new_te, struct dirent *de,
1884     const char *path, struct got_repository *repo)
1885 {
1886 	const struct got_error *err;
1887 	struct got_object_id *blob_id = NULL;
1888 	char *filepath;
1889 	struct stat sb;
1890 
1891 	if (asprintf(&filepath, "%s%s%s", path,
1892 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1893 		return got_error_from_errno("asprintf");
1894 
1895 	if (lstat(filepath, &sb) != 0) {
1896 		err = got_error_from_errno2("lstat", path);
1897 		goto done;
1898 	}
1899 
1900 	err = got_object_blob_create(&blob_id, filepath, repo);
1901 	if (err)
1902 		goto done;
1903 
1904 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
1905 	    blob_id);
1906 done:
1907 	free(filepath);
1908 	if (err)
1909 		free(blob_id);
1910 	return err;
1911 }
1912 
1913 static const struct got_error *
1914 insert_tree_entry(struct got_tree_entry *new_te,
1915     struct got_pathlist_head *paths)
1916 {
1917 	const struct got_error *err = NULL;
1918 	struct got_pathlist_entry *new_pe;
1919 
1920 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
1921 	if (err)
1922 		return err;
1923 	if (new_pe == NULL)
1924 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
1925 	return NULL;
1926 }
1927 
1928 static const struct got_error *write_tree(struct got_object_id **,
1929     const char *, struct got_pathlist_head *, struct got_repository *,
1930     got_repo_import_cb progress_cb, void *progress_arg);
1931 
1932 static const struct got_error *
1933 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
1934     const char *path, struct got_pathlist_head *ignores,
1935     struct got_repository *repo,
1936     got_repo_import_cb progress_cb, void *progress_arg)
1937 {
1938 	const struct got_error *err;
1939 	struct got_object_id *id = NULL;
1940 	char *subdirpath;
1941 
1942 	if (asprintf(&subdirpath, "%s%s%s", path,
1943 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1944 		return got_error_from_errno("asprintf");
1945 
1946 	(*new_te) = calloc(1, sizeof(**new_te));
1947 	if (*new_te == NULL)
1948 		return got_error_from_errno("calloc");
1949 	(*new_te)->mode = S_IFDIR;
1950 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
1951 	    sizeof((*new_te)->name)) {
1952 		err = got_error(GOT_ERR_NO_SPACE);
1953 		goto done;
1954 	}
1955 	err = write_tree(&id, subdirpath, ignores,  repo,
1956 	    progress_cb, progress_arg);
1957 	if (err)
1958 		goto done;
1959 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
1960 	
1961 done:
1962 	free(id);
1963 	free(subdirpath);
1964 	if (err) {
1965 		free(*new_te);
1966 		*new_te = NULL;
1967 	}
1968 	return err;
1969 }
1970 
1971 static const struct got_error *
1972 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
1973     struct got_pathlist_head *ignores, struct got_repository *repo,
1974     got_repo_import_cb progress_cb, void *progress_arg)
1975 {
1976 	const struct got_error *err = NULL;
1977 	DIR *dir;
1978 	struct dirent *de;
1979 	int nentries;
1980 	struct got_tree_entry *new_te = NULL;
1981 	struct got_pathlist_head paths;
1982 	struct got_pathlist_entry *pe;
1983 
1984 	*new_tree_id = NULL;
1985 
1986 	TAILQ_INIT(&paths);
1987 
1988 	dir = opendir(path_dir);
1989 	if (dir == NULL) {
1990 		err = got_error_from_errno2("opendir", path_dir);
1991 		goto done;
1992 	}
1993 
1994 	nentries = 0;
1995 	while ((de = readdir(dir)) != NULL) {
1996 		int ignore = 0;
1997 		int type;
1998 
1999 		if (strcmp(de->d_name, ".") == 0 ||
2000 		    strcmp(de->d_name, "..") == 0)
2001 			continue;
2002 
2003 		TAILQ_FOREACH(pe, ignores, entry) {
2004 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
2005 				ignore = 1;
2006 				break;
2007 			}
2008 		}
2009 		if (ignore)
2010 			continue;
2011 
2012 		err = got_path_dirent_type(&type, path_dir, de);
2013 		if (err)
2014 			goto done;
2015 
2016 		if (type == DT_DIR) {
2017 			err = import_subdir(&new_te, de, path_dir,
2018 			    ignores, repo, progress_cb, progress_arg);
2019 			if (err) {
2020 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
2021 					goto done;
2022 				err = NULL;
2023 				continue;
2024 			}
2025 		} else if (type == DT_REG || type == DT_LNK) {
2026 			err = import_file(&new_te, de, path_dir, repo);
2027 			if (err)
2028 				goto done;
2029 		} else
2030 			continue;
2031 
2032 		err = insert_tree_entry(new_te, &paths);
2033 		if (err)
2034 			goto done;
2035 		nentries++;
2036 	}
2037 
2038 	if (TAILQ_EMPTY(&paths)) {
2039 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
2040 		    "cannot create tree without any entries");
2041 		goto done;
2042 	}
2043 
2044 	TAILQ_FOREACH(pe, &paths, entry) {
2045 		struct got_tree_entry *te = pe->data;
2046 		char *path;
2047 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
2048 			continue;
2049 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
2050 			err = got_error_from_errno("asprintf");
2051 			goto done;
2052 		}
2053 		err = (*progress_cb)(progress_arg, path);
2054 		free(path);
2055 		if (err)
2056 			goto done;
2057 	}
2058 
2059 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
2060 done:
2061 	if (dir)
2062 		closedir(dir);
2063 	got_pathlist_free(&paths);
2064 	return err;
2065 }
2066 
2067 const struct got_error *
2068 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
2069     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
2070     struct got_repository *repo, got_repo_import_cb progress_cb,
2071     void *progress_arg)
2072 {
2073 	const struct got_error *err;
2074 	struct got_object_id *new_tree_id;
2075 
2076 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
2077 	    progress_cb, progress_arg);
2078 	if (err)
2079 		return err;
2080 
2081 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
2082 	    author, time(NULL), author, time(NULL), logmsg, repo);
2083 	free(new_tree_id);
2084 	return err;
2085 }
2086 
2087 const struct got_error *
2088 got_repo_get_loose_object_info(int *nobjects, off_t *ondisk_size,
2089     struct got_repository *repo)
2090 {
2091 	const struct got_error *err = NULL;
2092 	char *path_objects = NULL, *path = NULL;
2093 	DIR *dir = NULL;
2094 	struct got_object_id id;
2095 	int i;
2096 
2097 	*nobjects = 0;
2098 	*ondisk_size = 0;
2099 
2100 	path_objects = got_repo_get_path_objects(repo);
2101 	if (path_objects == NULL)
2102 		return got_error_from_errno("got_repo_get_path_objects");
2103 
2104 	for (i = 0; i <= 0xff; i++) {
2105 		struct dirent *dent;
2106 
2107 		if (asprintf(&path, "%s/%.2x", path_objects, i) == -1) {
2108 			err = got_error_from_errno("asprintf");
2109 			break;
2110 		}
2111 
2112 		dir = opendir(path);
2113 		if (dir == NULL) {
2114 			if (errno == ENOENT) {
2115 				err = NULL;
2116 				continue;
2117 			}
2118 			err = got_error_from_errno2("opendir", path);
2119 			break;
2120 		}
2121 
2122 		while ((dent = readdir(dir)) != NULL) {
2123 			char *id_str;
2124 			int fd;
2125 			struct stat sb;
2126 
2127 			if (strcmp(dent->d_name, ".") == 0 ||
2128 			    strcmp(dent->d_name, "..") == 0)
2129 				continue;
2130 
2131 			if (asprintf(&id_str, "%.2x%s", i, dent->d_name) == -1) {
2132 				err = got_error_from_errno("asprintf");
2133 				goto done;
2134 			}
2135 
2136 			if (!got_parse_sha1_digest(id.sha1, id_str)) {
2137 				free(id_str);
2138 				continue;
2139 			}
2140 			free(id_str);
2141 
2142 			err = got_object_open_loose_fd(&fd, &id, repo);
2143 			if (err)
2144 				goto done;
2145 
2146 			if (fstat(fd, &sb) == -1) {
2147 				err = got_error_from_errno("fstat");
2148 				close(fd);
2149 				goto done;
2150 			}
2151 			(*nobjects)++;
2152 			(*ondisk_size) += sb.st_size;
2153 
2154 			if (close(fd) == -1) {
2155 				err = got_error_from_errno("close");
2156 				goto done;
2157 			}
2158 		}
2159 
2160 		if (closedir(dir) != 0) {
2161 			err = got_error_from_errno("closedir");
2162 			goto done;
2163 		}
2164 		dir = NULL;
2165 
2166 		free(path);
2167 		path = NULL;
2168 	}
2169 done:
2170 	if (dir && closedir(dir) != 0 && err == NULL)
2171 		err = got_error_from_errno("closedir");
2172 
2173 	if (err) {
2174 		*nobjects = 0;
2175 		*ondisk_size = 0;
2176 	}
2177 	free(path_objects);
2178 	free(path);
2179 	return err;
2180 }
2181 
2182 const struct got_error *
2183 got_repo_get_packfile_info(int *npackfiles, int *nobjects,
2184     off_t *total_packsize, struct got_repository *repo)
2185 {
2186 	const struct got_error *err = NULL;
2187 	DIR *packdir = NULL;
2188 	struct dirent *dent;
2189 	struct got_packidx *packidx = NULL;
2190 	char *path_packidx;
2191 	char *path_packfile;
2192 	int packdir_fd;
2193 	struct stat sb;
2194 
2195 	*npackfiles = 0;
2196 	*nobjects = 0;
2197 	*total_packsize = 0;
2198 
2199 	packdir_fd = openat(got_repo_get_fd(repo),
2200 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
2201 	if (packdir_fd == -1) {
2202 		return got_error_from_errno_fmt("openat: %s/%s",
2203 		    got_repo_get_path_git_dir(repo),
2204 		    GOT_OBJECTS_PACK_DIR);
2205 	}
2206 
2207 	packdir = fdopendir(packdir_fd);
2208 	if (packdir == NULL) {
2209 		err = got_error_from_errno("fdopendir");
2210 		goto done;
2211 	}
2212 
2213 	while ((dent = readdir(packdir)) != NULL) {
2214 		if (!got_repo_is_packidx_filename(dent->d_name, dent->d_namlen))
2215 			continue;
2216 
2217 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
2218 		    dent->d_name) == -1) {
2219 			err = got_error_from_errno("asprintf");
2220 			goto done;
2221 		}
2222 
2223 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
2224 		    path_packidx, 0);
2225 		free(path_packidx);
2226 		if (err)
2227 			goto done;
2228 
2229 		if (fstat(packidx->fd, &sb) == -1)
2230 			goto done;
2231 		*total_packsize += sb.st_size;
2232 
2233 		err = got_packidx_get_packfile_path(&path_packfile,
2234 		    packidx->path_packidx);
2235 		if (err)
2236 			goto done;
2237 
2238 		if (fstatat(got_repo_get_fd(repo), path_packfile, &sb,
2239 		    0) == -1) {
2240 			free(path_packfile);
2241 			goto done;
2242 		}
2243 		free(path_packfile);
2244 		*total_packsize += sb.st_size;
2245 
2246 		*nobjects += be32toh(packidx->hdr.fanout_table[0xff]);
2247 
2248 		(*npackfiles)++;
2249 
2250 		got_packidx_close(packidx);
2251 		packidx = NULL;
2252 	}
2253 done:
2254 	if (packidx)
2255 		got_packidx_close(packidx);
2256 	if (packdir && closedir(packdir) != 0 && err == NULL)
2257 		err = got_error_from_errno("closedir");
2258 	if (err) {
2259 		*npackfiles = 0;
2260 		*nobjects = 0;
2261 		*total_packsize = 0;
2262 	}
2263 	return err;
2264 }
2265 
2266 RB_GENERATE(got_packidx_bloom_filter_tree, got_packidx_bloom_filter, entry,
2267     got_packidx_bloom_filter_cmp);