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Blob

Date:: Fri Sep 2 08:05:08 2022 UTC
Message:: plug a leak in match_loose_object in the loop of match_loose_object we allocate a string per directory entry that in some case it was free(3)'d before `continue' or `goto', but not always. Instead, use a more common idiom. ok stsp@
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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 #include "got_opentemp.h"
54 
55 #include "got_lib_delta.h"
56 #include "got_lib_inflate.h"
57 #include "got_lib_object.h"
58 #include "got_lib_object_parse.h"
59 #include "got_lib_object_create.h"
60 #include "got_lib_pack.h"
61 #include "got_lib_privsep.h"
62 #include "got_lib_sha1.h"
63 #include "got_lib_object_cache.h"
64 #include "got_lib_repository.h"
65 #include "got_lib_gotconfig.h"
66 
67 #ifndef nitems
68 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
69 #endif
70 
71 #define GOT_PACK_NUM_TEMPFILES		GOT_PACK_CACHE_SIZE * 2
72 
73 RB_PROTOTYPE(got_packidx_bloom_filter_tree, got_packidx_bloom_filter, entry,
74     got_packidx_bloom_filter_cmp);
75 
76 const char *
77 got_repo_get_path(struct got_repository *repo)
78 {
79 	return repo->path;
80 }
81 
82 const char *
83 got_repo_get_path_git_dir(struct got_repository *repo)
84 {
85 	return repo->path_git_dir;
86 }
87 
88 int
89 got_repo_get_fd(struct got_repository *repo)
90 {
91 	return repo->gitdir_fd;
92 }
93 
94 const char *
95 got_repo_get_gitconfig_author_name(struct got_repository *repo)
96 {
97 	return repo->gitconfig_author_name;
98 }
99 
100 const char *
101 got_repo_get_gitconfig_author_email(struct got_repository *repo)
102 {
103 	return repo->gitconfig_author_email;
104 }
105 
106 const char *
107 got_repo_get_global_gitconfig_author_name(struct got_repository *repo)
108 {
109 	return repo->global_gitconfig_author_name;
110 }
111 
112 const char *
113 got_repo_get_global_gitconfig_author_email(struct got_repository *repo)
114 {
115 	return repo->global_gitconfig_author_email;
116 }
117 
118 const char *
119 got_repo_get_gitconfig_owner(struct got_repository *repo)
120 {
121 	return repo->gitconfig_owner;
122 }
123 
124 void
125 got_repo_get_gitconfig_extensions(char ***extensions, int *nextensions,
126     struct got_repository *repo)
127 {
128 	*extensions = repo->extensions;
129 	*nextensions = repo->nextensions;
130 }
131 
132 int
133 got_repo_is_bare(struct got_repository *repo)
134 {
135 	return (strcmp(repo->path, repo->path_git_dir) == 0);
136 }
137 
138 static char *
139 get_path_git_child(struct got_repository *repo, const char *basename)
140 {
141 	char *path_child;
142 
143 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
144 	    basename) == -1)
145 		return NULL;
146 
147 	return path_child;
148 }
149 
150 char *
151 got_repo_get_path_objects(struct got_repository *repo)
152 {
153 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
154 }
155 
156 char *
157 got_repo_get_path_objects_pack(struct got_repository *repo)
158 {
159 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
160 }
161 
162 char *
163 got_repo_get_path_refs(struct got_repository *repo)
164 {
165 	return get_path_git_child(repo, GOT_REFS_DIR);
166 }
167 
168 char *
169 got_repo_get_path_packed_refs(struct got_repository *repo)
170 {
171 	return get_path_git_child(repo, GOT_PACKED_REFS_FILE);
172 }
173 
174 static char *
175 get_path_head(struct got_repository *repo)
176 {
177 	return get_path_git_child(repo, GOT_HEAD_FILE);
178 }
179 
180 char *
181 got_repo_get_path_gitconfig(struct got_repository *repo)
182 {
183 	return get_path_git_child(repo, GOT_GITCONFIG);
184 }
185 
186 char *
187 got_repo_get_path_gotconfig(struct got_repository *repo)
188 {
189 	return get_path_git_child(repo, GOT_GOTCONFIG_FILENAME);
190 }
191 
192 const struct got_gotconfig *
193 got_repo_get_gotconfig(struct got_repository *repo)
194 {
195 	return repo->gotconfig;
196 }
197 
198 void
199 got_repo_get_gitconfig_remotes(int *nremotes,
200     const struct got_remote_repo **remotes, struct got_repository *repo)
201 {
202 	*nremotes = repo->ngitconfig_remotes;
203 	*remotes = repo->gitconfig_remotes;
204 }
205 
206 static int
207 is_git_repo(struct got_repository *repo)
208 {
209 	const char *path_git = got_repo_get_path_git_dir(repo);
210 	char *path_objects = got_repo_get_path_objects(repo);
211 	char *path_refs = got_repo_get_path_refs(repo);
212 	char *path_head = get_path_head(repo);
213 	int ret = 0;
214 	struct stat sb;
215 	struct got_reference *head_ref;
216 
217 	if (lstat(path_git, &sb) == -1)
218 		goto done;
219 	if (!S_ISDIR(sb.st_mode))
220 		goto done;
221 
222 	if (lstat(path_objects, &sb) == -1)
223 		goto done;
224 	if (!S_ISDIR(sb.st_mode))
225 		goto done;
226 
227 	if (lstat(path_refs, &sb) == -1)
228 		goto done;
229 	if (!S_ISDIR(sb.st_mode))
230 		goto done;
231 
232 	if (lstat(path_head, &sb) == -1)
233 		goto done;
234 	if (!S_ISREG(sb.st_mode))
235 		goto done;
236 
237 	/* Check if the HEAD reference can be opened. */
238 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0) != NULL)
239 		goto done;
240 	got_ref_close(head_ref);
241 
242 	ret = 1;
243 done:
244 	free(path_objects);
245 	free(path_refs);
246 	free(path_head);
247 	return ret;
248 
249 }
250 
251 const struct got_error *
252 got_repo_pack_fds_open(int **pack_fds)
253 {
254 	const struct got_error *err = NULL;
255 	int i, *pack_fds_tmp;
256 
257 	pack_fds_tmp = calloc(GOT_PACK_NUM_TEMPFILES, sizeof(int));
258 	if (pack_fds_tmp == NULL)
259 		return got_error_from_errno("calloc");
260 	*pack_fds = calloc(GOT_PACK_NUM_TEMPFILES, sizeof(**pack_fds));
261 	if (*pack_fds == NULL) {
262 		free(pack_fds_tmp);
263 		return got_error_from_errno("calloc");
264 	}
265 
266 	/*
267 	 * got_repo_pack_fds_close will try to close all of the
268 	 * GOT_PACK_NUM_TEMPFILES fds, even the ones that didn't manage to get
269 	 * a value from got_opentempfd(), which would result in a close(0) if
270 	 * we do not initialize to -1 here.
271 	 */
272 	for (i = 0; i < GOT_PACK_NUM_TEMPFILES; i++)
273 		pack_fds_tmp[i] = -1;
274 
275 	for (i = 0; i < GOT_PACK_NUM_TEMPFILES; i++) {
276 		pack_fds_tmp[i] = got_opentempfd();
277 		if (pack_fds_tmp[i] == -1) {
278 			err = got_error_from_errno("got_opentempfd");
279 			got_repo_pack_fds_close(pack_fds_tmp);
280 			return err;
281 		}
282 	}
283 	memcpy(*pack_fds, pack_fds_tmp, GOT_PACK_NUM_TEMPFILES * sizeof(int));
284 	return err;
285 }
286 
287 const struct got_error *
288 got_repo_pack_fds_close(int *pack_fds)
289 {
290 	const struct got_error *err = NULL;
291 	int i;
292 
293 	for (i = 0; i < GOT_PACK_NUM_TEMPFILES; i++) {
294 		if (pack_fds[i] == -1)
295 			continue;
296 		if (close(pack_fds[i]) == -1) {
297 			err = got_error_from_errno("close");
298 			break;
299 		}
300 	}
301 	free(pack_fds);
302 	return err;
303 }
304 
305 const struct got_error *
306 got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
307     struct got_object *obj)
308 {
309 #ifndef GOT_NO_OBJ_CACHE
310 	const struct got_error *err = NULL;
311 	err = got_object_cache_add(&repo->objcache, id, obj);
312 	if (err) {
313 		if (err->code == GOT_ERR_OBJ_EXISTS ||
314 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
315 			err = NULL;
316 		return err;
317 	}
318 	obj->refcnt++;
319 #endif
320 	return NULL;
321 }
322 
323 struct got_object *
324 got_repo_get_cached_object(struct got_repository *repo,
325     struct got_object_id *id)
326 {
327 	return (struct got_object *)got_object_cache_get(&repo->objcache, id);
328 }
329 
330 const struct got_error *
331 got_repo_cache_tree(struct got_repository *repo, struct got_object_id *id,
332     struct got_tree_object *tree)
333 {
334 #ifndef GOT_NO_OBJ_CACHE
335 	const struct got_error *err = NULL;
336 	err = got_object_cache_add(&repo->treecache, id, tree);
337 	if (err) {
338 		if (err->code == GOT_ERR_OBJ_EXISTS ||
339 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
340 			err = NULL;
341 		return err;
342 	}
343 	tree->refcnt++;
344 #endif
345 	return NULL;
346 }
347 
348 struct got_tree_object *
349 got_repo_get_cached_tree(struct got_repository *repo,
350     struct got_object_id *id)
351 {
352 	return (struct got_tree_object *)got_object_cache_get(
353 	    &repo->treecache, id);
354 }
355 
356 const struct got_error *
357 got_repo_cache_commit(struct got_repository *repo, struct got_object_id *id,
358     struct got_commit_object *commit)
359 {
360 #ifndef GOT_NO_OBJ_CACHE
361 	const struct got_error *err = NULL;
362 	err = got_object_cache_add(&repo->commitcache, id, commit);
363 	if (err) {
364 		if (err->code == GOT_ERR_OBJ_EXISTS ||
365 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
366 			err = NULL;
367 		return err;
368 	}
369 	commit->refcnt++;
370 #endif
371 	return NULL;
372 }
373 
374 struct got_commit_object *
375 got_repo_get_cached_commit(struct got_repository *repo,
376     struct got_object_id *id)
377 {
378 	return (struct got_commit_object *)got_object_cache_get(
379 	    &repo->commitcache, id);
380 }
381 
382 const struct got_error *
383 got_repo_cache_tag(struct got_repository *repo, struct got_object_id *id,
384     struct got_tag_object *tag)
385 {
386 #ifndef GOT_NO_OBJ_CACHE
387 	const struct got_error *err = NULL;
388 	err = got_object_cache_add(&repo->tagcache, id, tag);
389 	if (err) {
390 		if (err->code == GOT_ERR_OBJ_EXISTS ||
391 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
392 			err = NULL;
393 		return err;
394 	}
395 	tag->refcnt++;
396 #endif
397 	return NULL;
398 }
399 
400 struct got_tag_object *
401 got_repo_get_cached_tag(struct got_repository *repo, struct got_object_id *id)
402 {
403 	return (struct got_tag_object *)got_object_cache_get(
404 	    &repo->tagcache, id);
405 }
406 
407 const struct got_error *
408 got_repo_cache_raw_object(struct got_repository *repo, struct got_object_id *id,
409     struct got_raw_object *raw)
410 {
411 #ifndef GOT_NO_OBJ_CACHE
412 	const struct got_error *err = NULL;
413 	err = got_object_cache_add(&repo->rawcache, id, raw);
414 	if (err) {
415 		if (err->code == GOT_ERR_OBJ_EXISTS ||
416 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
417 			err = NULL;
418 		return err;
419 	}
420 	raw->refcnt++;
421 #endif
422 	return NULL;
423 }
424 
425 
426 struct got_raw_object *
427 got_repo_get_cached_raw_object(struct got_repository *repo,
428     struct got_object_id *id)
429 {
430 	return (struct got_raw_object *)got_object_cache_get(&repo->rawcache, id);
431 }
432 
433 
434 static const struct got_error *
435 open_repo(struct got_repository *repo, const char *path)
436 {
437 	const struct got_error *err = NULL;
438 
439 	repo->gitdir_fd = -1;
440 
441 	/* bare git repository? */
442 	repo->path_git_dir = strdup(path);
443 	if (repo->path_git_dir == NULL)
444 		return got_error_from_errno("strdup");
445 	if (is_git_repo(repo)) {
446 		repo->path = strdup(repo->path_git_dir);
447 		if (repo->path == NULL) {
448 			err = got_error_from_errno("strdup");
449 			goto done;
450 		}
451 		repo->gitdir_fd = open(repo->path_git_dir,
452 		    O_DIRECTORY | O_CLOEXEC);
453 		if (repo->gitdir_fd == -1) {
454 			err = got_error_from_errno2("open",
455 			    repo->path_git_dir);
456 			goto done;
457 		}
458 		return NULL;
459 	}
460 
461 	/* git repository with working tree? */
462 	free(repo->path_git_dir);
463 	repo->path_git_dir = NULL;
464 	if (asprintf(&repo->path_git_dir, "%s/%s", path, GOT_GIT_DIR) == -1) {
465 		err = got_error_from_errno("asprintf");
466 		goto done;
467 	}
468 	if (is_git_repo(repo)) {
469 		repo->path = strdup(path);
470 		if (repo->path == NULL) {
471 			err = got_error_from_errno("strdup");
472 			goto done;
473 		}
474 		repo->gitdir_fd = open(repo->path_git_dir,
475 		    O_DIRECTORY | O_CLOEXEC);
476 		if (repo->gitdir_fd == -1) {
477 			err = got_error_from_errno2("open",
478 			    repo->path_git_dir);
479 			goto done;
480 		}
481 		return NULL;
482 	}
483 
484 	err = got_error(GOT_ERR_NOT_GIT_REPO);
485 done:
486 	if (err) {
487 		free(repo->path);
488 		repo->path = NULL;
489 		free(repo->path_git_dir);
490 		repo->path_git_dir = NULL;
491 		if (repo->gitdir_fd != -1)
492 			close(repo->gitdir_fd);
493 		repo->gitdir_fd = -1;
494 
495 	}
496 	return err;
497 }
498 
499 static const struct got_error *
500 parse_gitconfig_file(int *gitconfig_repository_format_version,
501     char **gitconfig_author_name, char **gitconfig_author_email,
502     struct got_remote_repo **remotes, int *nremotes,
503     char **gitconfig_owner, char ***extensions, int *nextensions,
504     const char *gitconfig_path)
505 {
506 	const struct got_error *err = NULL, *child_err = NULL;
507 	int fd = -1;
508 	int imsg_fds[2] = { -1, -1 };
509 	pid_t pid;
510 	struct imsgbuf *ibuf;
511 
512 	*gitconfig_repository_format_version = 0;
513 	if (extensions)
514 		*extensions = NULL;
515 	if (nextensions)
516 		*nextensions = 0;
517 	*gitconfig_author_name = NULL;
518 	*gitconfig_author_email = NULL;
519 	if (remotes)
520 		*remotes = NULL;
521 	if (nremotes)
522 		*nremotes = 0;
523 	if (gitconfig_owner)
524 		*gitconfig_owner = NULL;
525 
526 	fd = open(gitconfig_path, O_RDONLY | O_CLOEXEC);
527 	if (fd == -1) {
528 		if (errno == ENOENT)
529 			return NULL;
530 		return got_error_from_errno2("open", gitconfig_path);
531 	}
532 
533 	ibuf = calloc(1, sizeof(*ibuf));
534 	if (ibuf == NULL) {
535 		err = got_error_from_errno("calloc");
536 		goto done;
537 	}
538 
539 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
540 		err = got_error_from_errno("socketpair");
541 		goto done;
542 	}
543 
544 	pid = fork();
545 	if (pid == -1) {
546 		err = got_error_from_errno("fork");
547 		goto done;
548 	} else if (pid == 0) {
549 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
550 		    gitconfig_path);
551 		/* not reached */
552 	}
553 
554 	if (close(imsg_fds[1]) == -1) {
555 		err = got_error_from_errno("close");
556 		goto done;
557 	}
558 	imsg_fds[1] = -1;
559 	imsg_init(ibuf, imsg_fds[0]);
560 
561 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
562 	if (err)
563 		goto done;
564 	fd = -1;
565 
566 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
567 	if (err)
568 		goto done;
569 
570 	err = got_privsep_recv_gitconfig_int(
571 	    gitconfig_repository_format_version, ibuf);
572 	if (err)
573 		goto done;
574 
575 	if (extensions && nextensions) {
576 		err = got_privsep_send_gitconfig_repository_extensions_req(
577 		    ibuf);
578 		if (err)
579 			goto done;
580 		err = got_privsep_recv_gitconfig_int(nextensions, ibuf);
581 		if (err)
582 			goto done;
583 		if (*nextensions > 0) {
584 			int i;
585 			*extensions = calloc(*nextensions, sizeof(char *));
586 			if (*extensions == NULL) {
587 				err = got_error_from_errno("calloc");
588 				goto done;
589 			}
590 			for (i = 0; i < *nextensions; i++) {
591 				char *ext;
592 				err = got_privsep_recv_gitconfig_str(&ext,
593 				    ibuf);
594 				if (err)
595 					goto done;
596 				(*extensions)[i] = ext;
597 			}
598 		}
599 	}
600 
601 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
602 	if (err)
603 		goto done;
604 
605 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
606 	if (err)
607 		goto done;
608 
609 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
610 	if (err)
611 		goto done;
612 
613 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
614 	if (err)
615 		goto done;
616 
617 	if (remotes && nremotes) {
618 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
619 		if (err)
620 			goto done;
621 
622 		err = got_privsep_recv_gitconfig_remotes(remotes,
623 		    nremotes, ibuf);
624 		if (err)
625 			goto done;
626 	}
627 
628 	if (gitconfig_owner) {
629 		err = got_privsep_send_gitconfig_owner_req(ibuf);
630 		if (err)
631 			goto done;
632 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
633 		if (err)
634 			goto done;
635 	}
636 
637 	err = got_privsep_send_stop(imsg_fds[0]);
638 	child_err = got_privsep_wait_for_child(pid);
639 	if (child_err && err == NULL)
640 		err = child_err;
641 done:
642 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
643 		err = got_error_from_errno("close");
644 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
645 		err = got_error_from_errno("close");
646 	if (fd != -1 && close(fd) == -1 && err == NULL)
647 		err = got_error_from_errno2("close", gitconfig_path);
648 	free(ibuf);
649 	return err;
650 }
651 
652 static const struct got_error *
653 read_gitconfig(struct got_repository *repo, const char *global_gitconfig_path)
654 {
655 	const struct got_error *err = NULL;
656 	char *repo_gitconfig_path = NULL;
657 
658 	if (global_gitconfig_path) {
659 		/* Read settings from ~/.gitconfig. */
660 		int dummy_repo_version;
661 		err = parse_gitconfig_file(&dummy_repo_version,
662 		    &repo->global_gitconfig_author_name,
663 		    &repo->global_gitconfig_author_email,
664 		    NULL, NULL, NULL, NULL, NULL, global_gitconfig_path);
665 		if (err)
666 			return err;
667 	}
668 
669 	/* Read repository's .git/config file. */
670 	repo_gitconfig_path = got_repo_get_path_gitconfig(repo);
671 	if (repo_gitconfig_path == NULL)
672 		return got_error_from_errno("got_repo_get_path_gitconfig");
673 
674 	err = parse_gitconfig_file(&repo->gitconfig_repository_format_version,
675 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
676 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
677 	    &repo->gitconfig_owner, &repo->extensions, &repo->nextensions,
678 	    repo_gitconfig_path);
679 	if (err)
680 		goto done;
681 
682 	if (getenv("GOT_IGNORE_GITCONFIG") != NULL) {
683 		int i;
684 
685 		for (i = 0; i < repo->ngitconfig_remotes; i++) {
686 			got_repo_free_remote_repo_data(
687 			    &repo->gitconfig_remotes[i]);
688 		}
689 		free(repo->gitconfig_remotes);
690 		repo->gitconfig_remotes = NULL;
691 		repo->ngitconfig_remotes = 0;
692 
693 		free(repo->gitconfig_author_name);
694 		repo->gitconfig_author_name = NULL;
695 		free(repo->gitconfig_author_email);
696 		repo->gitconfig_author_email = NULL;
697 
698 		free(repo->global_gitconfig_author_name);
699 		repo->global_gitconfig_author_name = NULL;
700 		free(repo->global_gitconfig_author_email);
701 		repo->global_gitconfig_author_email = NULL;
702 	}
703 
704 done:
705 	free(repo_gitconfig_path);
706 	return err;
707 }
708 
709 static const struct got_error *
710 read_gotconfig(struct got_repository *repo)
711 {
712 	const struct got_error *err = NULL;
713 	char *gotconfig_path;
714 
715 	gotconfig_path = got_repo_get_path_gotconfig(repo);
716 	if (gotconfig_path == NULL)
717 		return got_error_from_errno("got_repo_get_path_gotconfig");
718 
719 	err = got_gotconfig_read(&repo->gotconfig, gotconfig_path);
720 	free(gotconfig_path);
721 	return err;
722 }
723 
724 /* Supported repository format extensions. */
725 static const char *const repo_extensions[] = {
726 	"noop",			/* Got supports repository format version 1. */
727 	"preciousObjects",	/* Supported by gotadmin cleanup. */
728 	"worktreeConfig",	/* Got does not care about Git work trees. */
729 };
730 
731 const struct got_error *
732 got_repo_open(struct got_repository **repop, const char *path,
733     const char *global_gitconfig_path, int *pack_fds)
734 {
735 	struct got_repository *repo = NULL;
736 	const struct got_error *err = NULL;
737 	char *repo_path = NULL;
738 	size_t i, j = 0;
739 	struct rlimit rl;
740 
741 	*repop = NULL;
742 
743 	if (getrlimit(RLIMIT_NOFILE, &rl) == -1)
744 		return got_error_from_errno("getrlimit");
745 
746 	repo = calloc(1, sizeof(*repo));
747 	if (repo == NULL)
748 		return got_error_from_errno("calloc");
749 
750 	RB_INIT(&repo->packidx_bloom_filters);
751 	TAILQ_INIT(&repo->packidx_paths);
752 
753 	for (i = 0; i < nitems(repo->privsep_children); i++) {
754 		memset(&repo->privsep_children[i], 0,
755 		    sizeof(repo->privsep_children[0]));
756 		repo->privsep_children[i].imsg_fd = -1;
757 	}
758 
759 	err = got_object_cache_init(&repo->objcache,
760 	    GOT_OBJECT_CACHE_TYPE_OBJ);
761 	if (err)
762 		goto done;
763 	err = got_object_cache_init(&repo->treecache,
764 	    GOT_OBJECT_CACHE_TYPE_TREE);
765 	if (err)
766 		goto done;
767 	err = got_object_cache_init(&repo->commitcache,
768 	    GOT_OBJECT_CACHE_TYPE_COMMIT);
769 	if (err)
770 		goto done;
771 	err = got_object_cache_init(&repo->tagcache,
772 	    GOT_OBJECT_CACHE_TYPE_TAG);
773 	if (err)
774 		goto done;
775 	err = got_object_cache_init(&repo->rawcache,
776 	    GOT_OBJECT_CACHE_TYPE_RAW);
777 	if (err)
778 		goto done;
779 
780 	repo->pack_cache_size = GOT_PACK_CACHE_SIZE;
781 	if (repo->pack_cache_size > rl.rlim_cur / 8)
782 		repo->pack_cache_size = rl.rlim_cur / 8;
783 	for (i = 0; i < nitems(repo->packs); i++) {
784 		if (i < repo->pack_cache_size) {
785 			repo->packs[i].basefd = pack_fds[j++];
786 			repo->packs[i].accumfd = pack_fds[j++];
787 		} else {
788 			repo->packs[i].basefd = -1;
789 			repo->packs[i].accumfd = -1;
790 		}
791 	}
792 	repo->pinned_pack = -1;
793 	repo->pinned_packidx = -1;
794 	repo->pinned_pid = 0;
795 
796 	repo_path = realpath(path, NULL);
797 	if (repo_path == NULL) {
798 		err = got_error_from_errno2("realpath", path);
799 		goto done;
800 	}
801 
802 	for (;;) {
803 		char *parent_path;
804 
805 		err = open_repo(repo, repo_path);
806 		if (err == NULL)
807 			break;
808 		if (err->code != GOT_ERR_NOT_GIT_REPO)
809 			goto done;
810 		if (repo_path[0] == '/' && repo_path[1] == '\0') {
811 			err = got_error(GOT_ERR_NOT_GIT_REPO);
812 			goto done;
813 		}
814 		err = got_path_dirname(&parent_path, repo_path);
815 		if (err)
816 			goto done;
817 		free(repo_path);
818 		repo_path = parent_path;
819 	}
820 
821 	err = read_gotconfig(repo);
822 	if (err)
823 		goto done;
824 
825 	err = read_gitconfig(repo, global_gitconfig_path);
826 	if (err)
827 		goto done;
828 	if (repo->gitconfig_repository_format_version != 0) {
829 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
830 		goto done;
831 	}
832 	for (i = 0; i < repo->nextensions; i++) {
833 		char *ext = repo->extensions[i];
834 		int j, supported = 0;
835 		for (j = 0; j < nitems(repo_extensions); j++) {
836 			if (strcmp(ext, repo_extensions[j]) == 0) {
837 				supported = 1;
838 				break;
839 			}
840 		}
841 		if (!supported) {
842 			err = got_error_path(ext, GOT_ERR_GIT_REPO_EXT);
843 			goto done;
844 		}
845 	}
846 
847 	err = got_repo_list_packidx(&repo->packidx_paths, repo);
848 done:
849 	if (err)
850 		got_repo_close(repo);
851 	else
852 		*repop = repo;
853 	free(repo_path);
854 	return err;
855 }
856 
857 const struct got_error *
858 got_repo_close(struct got_repository *repo)
859 {
860 	const struct got_error *err = NULL, *child_err;
861 	struct got_packidx_bloom_filter *bf;
862 	struct got_pathlist_entry *pe;
863 	size_t i;
864 
865 	for (i = 0; i < repo->pack_cache_size; i++) {
866 		if (repo->packidx_cache[i] == NULL)
867 			break;
868 		got_packidx_close(repo->packidx_cache[i]);
869 	}
870 
871 	while ((bf = RB_MIN(got_packidx_bloom_filter_tree,
872 	    &repo->packidx_bloom_filters))) {
873 		RB_REMOVE(got_packidx_bloom_filter_tree,
874 		    &repo->packidx_bloom_filters, bf);
875 		bloom_free(bf->bloom);
876 		free(bf->bloom);
877 		free(bf);
878 	}
879 
880 	for (i = 0; i < repo->pack_cache_size; i++)
881 		if (repo->packs[i].path_packfile)
882 			if (repo->packs[i].path_packfile)
883 				got_pack_close(&repo->packs[i]);
884 
885 	free(repo->path);
886 	free(repo->path_git_dir);
887 
888 	got_object_cache_close(&repo->objcache);
889 	got_object_cache_close(&repo->treecache);
890 	got_object_cache_close(&repo->commitcache);
891 	got_object_cache_close(&repo->tagcache);
892 	got_object_cache_close(&repo->rawcache);
893 
894 	for (i = 0; i < nitems(repo->privsep_children); i++) {
895 		if (repo->privsep_children[i].imsg_fd == -1)
896 			continue;
897 		imsg_clear(repo->privsep_children[i].ibuf);
898 		free(repo->privsep_children[i].ibuf);
899 		err = got_privsep_send_stop(repo->privsep_children[i].imsg_fd);
900 		child_err = got_privsep_wait_for_child(
901 		    repo->privsep_children[i].pid);
902 		if (child_err && err == NULL)
903 			err = child_err;
904 		if (close(repo->privsep_children[i].imsg_fd) == -1 &&
905 		    err == NULL)
906 			err = got_error_from_errno("close");
907 	}
908 
909 	if (repo->gitdir_fd != -1 && close(repo->gitdir_fd) == -1 &&
910 	    err == NULL)
911 		err = got_error_from_errno("close");
912 
913 	if (repo->gotconfig)
914 		got_gotconfig_free(repo->gotconfig);
915 	free(repo->gitconfig_author_name);
916 	free(repo->gitconfig_author_email);
917 	for (i = 0; i < repo->ngitconfig_remotes; i++)
918 		got_repo_free_remote_repo_data(&repo->gitconfig_remotes[i]);
919 	free(repo->gitconfig_remotes);
920 	for (i = 0; i < repo->nextensions; i++)
921 		free(repo->extensions[i]);
922 	free(repo->extensions);
923 
924 	TAILQ_FOREACH(pe, &repo->packidx_paths, entry)
925 		free((void *)pe->path);
926 	got_pathlist_free(&repo->packidx_paths);
927 	free(repo);
928 
929 	return err;
930 }
931 
932 void
933 got_repo_free_remote_repo_data(struct got_remote_repo *repo)
934 {
935 	int i;
936 
937 	free(repo->name);
938 	repo->name = NULL;
939 	free(repo->fetch_url);
940 	repo->fetch_url = NULL;
941 	free(repo->send_url);
942 	repo->send_url = NULL;
943 	for (i = 0; i < repo->nfetch_branches; i++)
944 		free(repo->fetch_branches[i]);
945 	free(repo->fetch_branches);
946 	repo->fetch_branches = NULL;
947 	repo->nfetch_branches = 0;
948 	for (i = 0; i < repo->nsend_branches; i++)
949 		free(repo->send_branches[i]);
950 	free(repo->send_branches);
951 	repo->send_branches = NULL;
952 	repo->nsend_branches = 0;
953 }
954 
955 const struct got_error *
956 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
957     const char *input_path)
958 {
959 	const struct got_error *err = NULL;
960 	const char *repo_abspath = NULL;
961 	size_t repolen, len;
962 	char *canonpath, *path = NULL;
963 
964 	*in_repo_path = NULL;
965 
966 	canonpath = strdup(input_path);
967 	if (canonpath == NULL) {
968 		err = got_error_from_errno("strdup");
969 		goto done;
970 	}
971 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
972 	if (err)
973 		goto done;
974 
975 	repo_abspath = got_repo_get_path(repo);
976 
977 	if (canonpath[0] == '\0') {
978 		path = strdup(canonpath);
979 		if (path == NULL) {
980 			err = got_error_from_errno("strdup");
981 			goto done;
982 		}
983 	} else {
984 		path = realpath(canonpath, NULL);
985 		if (path == NULL) {
986 			if (errno != ENOENT) {
987 				err = got_error_from_errno2("realpath",
988 				    canonpath);
989 				goto done;
990 			}
991 			/*
992 			 * Path is not on disk.
993 			 * Assume it is already relative to repository root.
994 			 */
995 			path = strdup(canonpath);
996 			if (path == NULL) {
997 				err = got_error_from_errno("strdup");
998 				goto done;
999 			}
1000 		}
1001 
1002 		repolen = strlen(repo_abspath);
1003 		len = strlen(path);
1004 
1005 
1006 		if (strcmp(path, repo_abspath) == 0) {
1007 			free(path);
1008 			path = strdup("");
1009 			if (path == NULL) {
1010 				err = got_error_from_errno("strdup");
1011 				goto done;
1012 			}
1013 		} else if (len > repolen &&
1014 		    got_path_is_child(path, repo_abspath, repolen)) {
1015 			/* Matched an on-disk path inside repository. */
1016 			if (got_repo_is_bare(repo)) {
1017 				/*
1018 				 * Matched an on-disk path inside repository
1019 				 * database. Treat input as repository-relative.
1020 				 */
1021 				free(path);
1022 				path = canonpath;
1023 				canonpath = NULL;
1024 			} else {
1025 				char *child;
1026 				/* Strip common prefix with repository path. */
1027 				err = got_path_skip_common_ancestor(&child,
1028 				    repo_abspath, path);
1029 				if (err)
1030 					goto done;
1031 				free(path);
1032 				path = child;
1033 			}
1034 		} else {
1035 			/*
1036 			 * Matched unrelated on-disk path.
1037 			 * Treat input as repository-relative.
1038 			 */
1039 			free(path);
1040 			path = canonpath;
1041 			canonpath = NULL;
1042 		}
1043 	}
1044 
1045 	/* Make in-repository path absolute */
1046 	if (path[0] != '/') {
1047 		char *abspath;
1048 		if (asprintf(&abspath, "/%s", path) == -1) {
1049 			err = got_error_from_errno("asprintf");
1050 			goto done;
1051 		}
1052 		free(path);
1053 		path = abspath;
1054 	}
1055 
1056 done:
1057 	free(canonpath);
1058 	if (err)
1059 		free(path);
1060 	else
1061 		*in_repo_path = path;
1062 	return err;
1063 }
1064 
1065 static const struct got_error *
1066 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
1067     const char *path_packidx)
1068 {
1069 	const struct got_error *err = NULL;
1070 	size_t i;
1071 
1072 	for (i = 0; i < repo->pack_cache_size; i++) {
1073 		if (repo->packidx_cache[i] == NULL)
1074 			break;
1075 		if (strcmp(repo->packidx_cache[i]->path_packidx,
1076 		    path_packidx) == 0) {
1077 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1078 		}
1079 	}
1080 	if (i == repo->pack_cache_size) {
1081 		do {
1082 			i--;
1083 		} while (i > 0 && repo->pinned_packidx >= 0 &&
1084 		    i == repo->pinned_packidx);
1085 		err = got_packidx_close(repo->packidx_cache[i]);
1086 		if (err)
1087 			return err;
1088 	}
1089 
1090 	repo->packidx_cache[i] = packidx;
1091 
1092 	return NULL;
1093 }
1094 
1095 int
1096 got_repo_is_packidx_filename(const char *name, size_t len)
1097 {
1098 	if (len != GOT_PACKIDX_NAMELEN)
1099 		return 0;
1100 
1101 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
1102 		return 0;
1103 
1104 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
1105 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
1106 		return 0;
1107 
1108 	return 1;
1109 }
1110 
1111 static struct got_packidx_bloom_filter *
1112 get_packidx_bloom_filter(struct got_repository *repo,
1113     const char *path, size_t path_len)
1114 {
1115 	struct got_packidx_bloom_filter key;
1116 
1117 	if (strlcpy(key.path, path, sizeof(key.path)) >= sizeof(key.path))
1118 		return NULL; /* XXX */
1119 	key.path_len = path_len;
1120 
1121 	return RB_FIND(got_packidx_bloom_filter_tree,
1122 	    &repo->packidx_bloom_filters, &key);
1123 }
1124 
1125 int
1126 got_repo_check_packidx_bloom_filter(struct got_repository *repo,
1127     const char *path_packidx, struct got_object_id *id)
1128 {
1129 	struct got_packidx_bloom_filter *bf;
1130 
1131 	bf = get_packidx_bloom_filter(repo, path_packidx, strlen(path_packidx));
1132 	if (bf)
1133 		return bloom_check(bf->bloom, id->sha1, sizeof(id->sha1));
1134 
1135 	/* No bloom filter means this pack index must be searched. */
1136 	return 1;
1137 }
1138 
1139 static const struct got_error *
1140 add_packidx_bloom_filter(struct got_repository *repo,
1141     struct got_packidx *packidx, const char *path_packidx)
1142 {
1143 	int i, nobjects = be32toh(packidx->hdr.fanout_table[0xff]);
1144 	struct got_packidx_bloom_filter *bf;
1145 	size_t len;
1146 
1147 	/*
1148 	 * Don't use bloom filters for very large pack index files.
1149 	 * Large pack files will contain a relatively large fraction
1150 	 * of our objects so we will likely need to visit them anyway.
1151 	 * The more objects a pack file contains the higher the probability
1152 	 * of a false-positive match from the bloom filter. And reading
1153 	 * all object IDs from a large pack index file can be expensive.
1154 	 */
1155 	if (nobjects > 100000) /* cut-off at about 2MB, at 20 bytes per ID */
1156 		return NULL;
1157 
1158 	/* Do we already have a filter for this pack index? */
1159 	if (get_packidx_bloom_filter(repo, path_packidx,
1160 	    strlen(path_packidx)) != NULL)
1161 		return NULL;
1162 
1163 	bf = calloc(1, sizeof(*bf));
1164 	if (bf == NULL)
1165 		return got_error_from_errno("calloc");
1166 	bf->bloom = calloc(1, sizeof(*bf->bloom));
1167 	if (bf->bloom == NULL) {
1168 		free(bf);
1169 		return got_error_from_errno("calloc");
1170 	}
1171 
1172 	len = strlcpy(bf->path, path_packidx, sizeof(bf->path));
1173 	if (len >= sizeof(bf->path)) {
1174 		free(bf->bloom);
1175 		free(bf);
1176 		return got_error(GOT_ERR_NO_SPACE);
1177 	}
1178 	bf->path_len = len;
1179 
1180 	/* Minimum size supported by our bloom filter is 1000 entries. */
1181 	bloom_init(bf->bloom, nobjects < 1000 ? 1000 : nobjects, 0.1);
1182 	for (i = 0; i < nobjects; i++) {
1183 		struct got_packidx_object_id *id;
1184 		id = &packidx->hdr.sorted_ids[i];
1185 		bloom_add(bf->bloom, id->sha1, sizeof(id->sha1));
1186 	}
1187 
1188 	RB_INSERT(got_packidx_bloom_filter_tree,
1189 	    &repo->packidx_bloom_filters, bf);
1190 	return NULL;
1191 }
1192 
1193 const struct got_error *
1194 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
1195     struct got_repository *repo, struct got_object_id *id)
1196 {
1197 	const struct got_error *err;
1198 	struct got_pathlist_entry *pe;
1199 	size_t i;
1200 
1201 	/* Search pack index cache. */
1202 	for (i = 0; i < repo->pack_cache_size; i++) {
1203 		if (repo->packidx_cache[i] == NULL)
1204 			break;
1205 		if (!got_repo_check_packidx_bloom_filter(repo,
1206 		    repo->packidx_cache[i]->path_packidx, id))
1207 			continue; /* object will not be found in this index */
1208 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
1209 		if (*idx != -1) {
1210 			*packidx = repo->packidx_cache[i];
1211 			/*
1212 			 * Move this cache entry to the front. Repeatedly
1213 			 * searching a wrong pack index can be expensive.
1214 			 */
1215 			if (i > 0) {
1216 				memmove(&repo->packidx_cache[1],
1217 				    &repo->packidx_cache[0],
1218 				    i * sizeof(repo->packidx_cache[0]));
1219 				repo->packidx_cache[0] = *packidx;
1220 				if (repo->pinned_packidx >= 0 &&
1221 				    repo->pinned_packidx < i)
1222 					repo->pinned_packidx++;
1223 				else if (repo->pinned_packidx == i)
1224 					repo->pinned_packidx = 0;
1225 			}
1226 			return NULL;
1227 		}
1228 	}
1229 	/* No luck. Search the filesystem. */
1230 
1231 	TAILQ_FOREACH(pe, &repo->packidx_paths, entry) {
1232 		const char *path_packidx = pe->path;
1233 		int is_cached = 0;
1234 
1235 		if (!got_repo_check_packidx_bloom_filter(repo,
1236 		    pe->path, id))
1237 			continue; /* object will not be found in this index */
1238 
1239 		for (i = 0; i < repo->pack_cache_size; i++) {
1240 			if (repo->packidx_cache[i] == NULL)
1241 				break;
1242 			if (strcmp(repo->packidx_cache[i]->path_packidx,
1243 			    path_packidx) == 0) {
1244 				is_cached = 1;
1245 				break;
1246 			}
1247 		}
1248 		if (is_cached)
1249 			continue; /* already searched */
1250 
1251 		err = got_packidx_open(packidx, got_repo_get_fd(repo),
1252 		    path_packidx, 0);
1253 		if (err)
1254 			goto done;
1255 
1256 		err = add_packidx_bloom_filter(repo, *packidx, path_packidx);
1257 		if (err)
1258 			goto done;
1259 
1260 		err = cache_packidx(repo, *packidx, path_packidx);
1261 		if (err)
1262 			goto done;
1263 
1264 		*idx = got_packidx_get_object_idx(*packidx, id);
1265 		if (*idx != -1) {
1266 			err = NULL; /* found the object */
1267 			goto done;
1268 		}
1269 	}
1270 
1271 	err = got_error_no_obj(id);
1272 done:
1273 	return err;
1274 }
1275 
1276 const struct got_error *
1277 got_repo_list_packidx(struct got_pathlist_head *packidx_paths,
1278     struct got_repository *repo)
1279 {
1280 	const struct got_error *err = NULL;
1281 	DIR *packdir = NULL;
1282 	struct dirent *dent;
1283 	char *path_packidx = NULL;
1284 	int packdir_fd;
1285 	struct stat sb;
1286 
1287 	packdir_fd = openat(got_repo_get_fd(repo),
1288 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY | O_CLOEXEC);
1289 	if (packdir_fd == -1) {
1290 		return got_error_from_errno_fmt("openat: %s/%s",
1291 		    got_repo_get_path_git_dir(repo),
1292 		    GOT_OBJECTS_PACK_DIR);
1293 	}
1294 
1295 	packdir = fdopendir(packdir_fd);
1296 	if (packdir == NULL) {
1297 		err = got_error_from_errno("fdopendir");
1298 		goto done;
1299 	}
1300 
1301 	if (fstat(packdir_fd, &sb) == -1) {
1302 		err = got_error_from_errno("fstat");
1303 		goto done;
1304 	}
1305 	repo->pack_path_mtime = sb.st_mtime;
1306 
1307 	while ((dent = readdir(packdir)) != NULL) {
1308 		if (!got_repo_is_packidx_filename(dent->d_name, dent->d_namlen))
1309 			continue;
1310 
1311 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1312 		    dent->d_name) == -1) {
1313 			err = got_error_from_errno("asprintf");
1314 			path_packidx = NULL;
1315 			break;
1316 		}
1317 
1318 		err = got_pathlist_append(packidx_paths, path_packidx, NULL);
1319 		if (err)
1320 			break;
1321 	}
1322 done:
1323 	if (err)
1324 		free(path_packidx);
1325 	if (packdir && closedir(packdir) != 0 && err == NULL)
1326 		err = got_error_from_errno("closedir");
1327 	return err;
1328 }
1329 
1330 const struct got_error *
1331 got_repo_get_packidx(struct got_packidx **packidx, const char *path_packidx,
1332     struct got_repository *repo)
1333 {
1334 	const struct got_error *err;
1335 	size_t i;
1336 
1337 	*packidx = NULL;
1338 
1339 	/* Search pack index cache. */
1340 	for (i = 0; i < repo->pack_cache_size; i++) {
1341 		if (repo->packidx_cache[i] == NULL)
1342 			break;
1343 		if (strcmp(repo->packidx_cache[i]->path_packidx,
1344 		    path_packidx) == 0) {
1345 			*packidx = repo->packidx_cache[i];
1346 			return NULL;
1347 		}
1348 	}
1349 	/* No luck. Search the filesystem. */
1350 
1351 	err = got_packidx_open(packidx, got_repo_get_fd(repo),
1352 	    path_packidx, 0);
1353 	if (err)
1354 		return err;
1355 
1356 	err = add_packidx_bloom_filter(repo, *packidx, path_packidx);
1357 	if (err)
1358 		goto done;
1359 
1360 	err = cache_packidx(repo, *packidx, path_packidx);
1361 done:
1362 	if (err) {
1363 		got_packidx_close(*packidx);
1364 		*packidx = NULL;
1365 	}
1366 	return err;
1367 }
1368 
1369 static const struct got_error *
1370 read_packfile_hdr(int fd, struct got_packidx *packidx)
1371 {
1372 	const struct got_error *err = NULL;
1373 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
1374 	struct got_packfile_hdr hdr;
1375 	ssize_t n;
1376 
1377 	n = read(fd, &hdr, sizeof(hdr));
1378 	if (n < 0)
1379 		return got_error_from_errno("read");
1380 	if (n != sizeof(hdr))
1381 		return got_error(GOT_ERR_BAD_PACKFILE);
1382 
1383 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
1384 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
1385 	    be32toh(hdr.nobjects) != totobj)
1386 		err = got_error(GOT_ERR_BAD_PACKFILE);
1387 
1388 	return err;
1389 }
1390 
1391 static const struct got_error *
1392 open_packfile(int *fd, struct got_repository *repo,
1393     const char *relpath, struct got_packidx *packidx)
1394 {
1395 	const struct got_error *err = NULL;
1396 
1397 	*fd = openat(got_repo_get_fd(repo), relpath,
1398 	    O_RDONLY | O_NOFOLLOW | O_CLOEXEC);
1399 	if (*fd == -1)
1400 		return got_error_from_errno_fmt("openat: %s/%s",
1401 		    got_repo_get_path_git_dir(repo), relpath);
1402 
1403 	if (packidx) {
1404 		err = read_packfile_hdr(*fd, packidx);
1405 		if (err) {
1406 			close(*fd);
1407 			*fd = -1;
1408 		}
1409 	}
1410 
1411 	return err;
1412 }
1413 
1414 const struct got_error *
1415 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
1416     const char *path_packfile, struct got_packidx *packidx)
1417 {
1418 	const struct got_error *err = NULL;
1419 	struct got_pack *pack = NULL;
1420 	struct stat sb;
1421 	size_t i;
1422 
1423 	if (packp)
1424 		*packp = NULL;
1425 
1426 	for (i = 0; i < repo->pack_cache_size; i++) {
1427 		pack = &repo->packs[i];
1428 		if (pack->path_packfile == NULL)
1429 			break;
1430 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1431 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1432 	}
1433 
1434 	if (i == repo->pack_cache_size) {
1435 		struct got_pack tmp;
1436 		do {
1437 			i--;
1438 		} while (i > 0 && repo->pinned_pack >= 0 &&
1439 		    i == repo->pinned_pack);
1440 		err = got_pack_close(&repo->packs[i]);
1441 		if (err)
1442 			return err;
1443 		if (ftruncate(repo->packs[i].basefd, 0L) == -1)
1444 			return got_error_from_errno("ftruncate");
1445 		if (ftruncate(repo->packs[i].accumfd, 0L) == -1)
1446 			return got_error_from_errno("ftruncate");
1447 		memcpy(&tmp, &repo->packs[i], sizeof(tmp));
1448 		memcpy(&repo->packs[i], &repo->packs[0],
1449 		    sizeof(repo->packs[i]));
1450 		memcpy(&repo->packs[0], &tmp, sizeof(repo->packs[0]));
1451 		if (repo->pinned_pack == 0)
1452 			repo->pinned_pack = i;
1453 		else if (repo->pinned_pack == i)
1454 			repo->pinned_pack = 0;
1455 		i = 0;
1456 	}
1457 
1458 	pack = &repo->packs[i];
1459 
1460 	pack->path_packfile = strdup(path_packfile);
1461 	if (pack->path_packfile == NULL) {
1462 		err = got_error_from_errno("strdup");
1463 		goto done;
1464 	}
1465 
1466 	err = open_packfile(&pack->fd, repo, path_packfile, packidx);
1467 	if (err)
1468 		goto done;
1469 
1470 	if (fstat(pack->fd, &sb) != 0) {
1471 		err = got_error_from_errno("fstat");
1472 		goto done;
1473 	}
1474 	pack->filesize = sb.st_size;
1475 
1476 	pack->privsep_child = NULL;
1477 
1478 #ifndef GOT_PACK_NO_MMAP
1479 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1480 	    pack->fd, 0);
1481 	if (pack->map == MAP_FAILED) {
1482 		if (errno != ENOMEM) {
1483 			err = got_error_from_errno("mmap");
1484 			goto done;
1485 		}
1486 		pack->map = NULL; /* fall back to read(2) */
1487 	}
1488 #endif
1489 done:
1490 	if (err) {
1491 		if (pack) {
1492 			free(pack->path_packfile);
1493 			memset(pack, 0, sizeof(*pack));
1494 		}
1495 	} else if (packp)
1496 		*packp = pack;
1497 	return err;
1498 }
1499 
1500 struct got_pack *
1501 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1502 {
1503 	struct got_pack *pack = NULL;
1504 	size_t i;
1505 
1506 	for (i = 0; i < repo->pack_cache_size; i++) {
1507 		pack = &repo->packs[i];
1508 		if (pack->path_packfile == NULL)
1509 			break;
1510 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1511 			return pack;
1512 	}
1513 
1514 	return NULL;
1515 }
1516 
1517 const struct got_error *
1518 got_repo_pin_pack(struct got_repository *repo, struct got_packidx *packidx,
1519     struct got_pack *pack)
1520 {
1521 	size_t i;
1522 	int pinned_pack = -1, pinned_packidx = -1;
1523 
1524 	for (i = 0; i < repo->pack_cache_size; i++) {
1525 		if (repo->packidx_cache[i] &&
1526 		    strcmp(repo->packidx_cache[i]->path_packidx,
1527 		    packidx->path_packidx) == 0)
1528 			pinned_packidx = i;
1529 		if (repo->packs[i].path_packfile &&
1530 		    strcmp(repo->packs[i].path_packfile,
1531 		    pack->path_packfile) == 0)
1532 			pinned_pack = i;
1533 	}
1534 
1535 	if (pinned_packidx == -1 || pinned_pack == -1)
1536 		return got_error(GOT_ERR_PIN_PACK);
1537 
1538 	repo->pinned_pack = pinned_pack;
1539 	repo->pinned_packidx = pinned_packidx;
1540 	repo->pinned_pid = repo->packs[pinned_pack].privsep_child->pid;
1541 	return NULL;
1542 }
1543 
1544 struct got_pack *
1545 got_repo_get_pinned_pack(struct got_repository *repo)
1546 {
1547 	if (repo->pinned_pack >= 0 &&
1548 	    repo->pinned_pack < repo->pack_cache_size)
1549 		return &repo->packs[repo->pinned_pack];
1550 
1551 	return NULL;
1552 }
1553 
1554 void
1555 got_repo_unpin_pack(struct got_repository *repo)
1556 {
1557 	repo->pinned_packidx = -1;
1558 	repo->pinned_pack = -1;
1559 	repo->pinned_pid = 0;
1560 }
1561 
1562 const struct got_error *
1563 got_repo_init(const char *repo_path)
1564 {
1565 	const struct got_error *err = NULL;
1566 	const char *dirnames[] = {
1567 		GOT_OBJECTS_DIR,
1568 		GOT_OBJECTS_PACK_DIR,
1569 		GOT_REFS_DIR,
1570 	};
1571 	const char *description_str = "Unnamed repository; "
1572 	    "edit this file 'description' to name the repository.";
1573 	const char *headref_str = "ref: refs/heads/main";
1574 	const char *gitconfig_str = "[core]\n"
1575 	    "\trepositoryformatversion = 0\n"
1576 	    "\tfilemode = true\n"
1577 	    "\tbare = true\n";
1578 	char *path;
1579 	size_t i;
1580 
1581 	if (!got_path_dir_is_empty(repo_path))
1582 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1583 
1584 	for (i = 0; i < nitems(dirnames); i++) {
1585 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1586 			return got_error_from_errno("asprintf");
1587 		}
1588 		err = got_path_mkdir(path);
1589 		free(path);
1590 		if (err)
1591 			return err;
1592 	}
1593 
1594 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1595 		return got_error_from_errno("asprintf");
1596 	err = got_path_create_file(path, description_str);
1597 	free(path);
1598 	if (err)
1599 		return err;
1600 
1601 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1602 		return got_error_from_errno("asprintf");
1603 	err = got_path_create_file(path, headref_str);
1604 	free(path);
1605 	if (err)
1606 		return err;
1607 
1608 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1609 		return got_error_from_errno("asprintf");
1610 	err = got_path_create_file(path, gitconfig_str);
1611 	free(path);
1612 	if (err)
1613 		return err;
1614 
1615 	return NULL;
1616 }
1617 
1618 static void
1619 purge_packidx_paths(struct got_pathlist_head *packidx_paths)
1620 {
1621 	struct got_pathlist_entry *pe;
1622 
1623 	while (!TAILQ_EMPTY(packidx_paths)) {
1624 		pe = TAILQ_FIRST(packidx_paths);
1625 		TAILQ_REMOVE(packidx_paths, pe, entry);
1626 		free((char *)pe->path);
1627 		free(pe);
1628 	}
1629 }
1630 
1631 static const struct got_error *
1632 match_packed_object(struct got_object_id **unique_id,
1633     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1634 {
1635 	const struct got_error *err = NULL;
1636 	struct got_object_id_queue matched_ids;
1637 	struct got_pathlist_entry *pe;
1638 	struct stat sb;
1639 
1640 	STAILQ_INIT(&matched_ids);
1641 
1642 	if (stat(got_repo_get_path_objects_pack(repo), &sb) == -1) {
1643 		if (errno != ENOENT)
1644 			return got_error_from_errno2("stat",
1645 			    got_repo_get_path_objects_pack(repo));
1646 	} else if (sb.st_mtime != repo->pack_path_mtime) {
1647 		purge_packidx_paths(&repo->packidx_paths);
1648 		err = got_repo_list_packidx(&repo->packidx_paths, repo);
1649 		if (err)
1650 			return err;
1651 	}
1652 
1653 	TAILQ_FOREACH(pe, &repo->packidx_paths, entry) {
1654 		const char *path_packidx = pe->path;
1655 		struct got_packidx *packidx;
1656 		struct got_object_qid *qid;
1657 
1658 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1659 		    path_packidx, 0);
1660 		if (err)
1661 			break;
1662 
1663 		err = got_packidx_match_id_str_prefix(&matched_ids,
1664 		    packidx, id_str_prefix);
1665 		if (err) {
1666 			got_packidx_close(packidx);
1667 			break;
1668 		}
1669 		err = got_packidx_close(packidx);
1670 		if (err)
1671 			break;
1672 
1673 		STAILQ_FOREACH(qid, &matched_ids, entry) {
1674 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1675 				int matched_type;
1676 				err = got_object_get_type(&matched_type, repo,
1677 				    &qid->id);
1678 				if (err)
1679 					goto done;
1680 				if (matched_type != obj_type)
1681 					continue;
1682 			}
1683 			if (*unique_id == NULL) {
1684 				*unique_id = got_object_id_dup(&qid->id);
1685 				if (*unique_id == NULL) {
1686 					err = got_error_from_errno("malloc");
1687 					goto done;
1688 				}
1689 			} else {
1690 				if (got_object_id_cmp(*unique_id,
1691 				    &qid->id) == 0)
1692 					continue; /* packed multiple times */
1693 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1694 				goto done;
1695 			}
1696 		}
1697 	}
1698 done:
1699 	got_object_id_queue_free(&matched_ids);
1700 	if (err) {
1701 		free(*unique_id);
1702 		*unique_id = NULL;
1703 	}
1704 	return err;
1705 }
1706 
1707 static const struct got_error *
1708 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1709     const char *object_dir, const char *id_str_prefix, int obj_type,
1710     struct got_repository *repo)
1711 {
1712 	const struct got_error *err = NULL;
1713 	char *path, *id_str = NULL;
1714 	DIR *dir = NULL;
1715 	struct dirent *dent;
1716 	struct got_object_id id;
1717 
1718 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1719 		err = got_error_from_errno("asprintf");
1720 		goto done;
1721 	}
1722 
1723 	dir = opendir(path);
1724 	if (dir == NULL) {
1725 		if (errno == ENOENT) {
1726 			err = NULL;
1727 			goto done;
1728 		}
1729 		err = got_error_from_errno2("opendir", path);
1730 		goto done;
1731 	}
1732 	while ((dent = readdir(dir)) != NULL) {
1733 		int cmp;
1734 
1735 		free(id_str);
1736 		id_str = NULL;
1737 
1738 		if (strcmp(dent->d_name, ".") == 0 ||
1739 		    strcmp(dent->d_name, "..") == 0)
1740 			continue;
1741 
1742 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1743 			err = got_error_from_errno("asprintf");
1744 			goto done;
1745 		}
1746 
1747 		if (!got_parse_sha1_digest(id.sha1, id_str))
1748 			continue;
1749 
1750 		/*
1751 		 * Directory entries do not necessarily appear in
1752 		 * sorted order, so we must iterate over all of them.
1753 		 */
1754 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1755 		if (cmp != 0)
1756 			continue;
1757 
1758 		if (*unique_id == NULL) {
1759 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1760 				int matched_type;
1761 				err = got_object_get_type(&matched_type, repo,
1762 				    &id);
1763 				if (err)
1764 					goto done;
1765 				if (matched_type != obj_type)
1766 					continue;
1767 			}
1768 			*unique_id = got_object_id_dup(&id);
1769 			if (*unique_id == NULL) {
1770 				err = got_error_from_errno("got_object_id_dup");
1771 				goto done;
1772 			}
1773 		} else {
1774 			if (got_object_id_cmp(*unique_id, &id) == 0)
1775 				continue; /* both packed and loose */
1776 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1777 			goto done;
1778 		}
1779 	}
1780 done:
1781 	if (dir && closedir(dir) != 0 && err == NULL)
1782 		err = got_error_from_errno("closedir");
1783 	if (err) {
1784 		free(*unique_id);
1785 		*unique_id = NULL;
1786 	}
1787 	free(id_str);
1788 	free(path);
1789 	return err;
1790 }
1791 
1792 const struct got_error *
1793 got_repo_match_object_id_prefix(struct got_object_id **id,
1794     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1795 {
1796 	const struct got_error *err = NULL;
1797 	char *path_objects = got_repo_get_path_objects(repo);
1798 	char *object_dir = NULL;
1799 	size_t len;
1800 	int i;
1801 
1802 	*id = NULL;
1803 
1804 	len = strlen(id_str_prefix);
1805 	if (len > SHA1_DIGEST_STRING_LENGTH - 1)
1806 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1807 
1808 	for (i = 0; i < len; i++) {
1809 		if (isxdigit((unsigned char)id_str_prefix[i]))
1810 			continue;
1811 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1812 	}
1813 
1814 	if (len >= 2) {
1815 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1816 		if (err)
1817 			goto done;
1818 		object_dir = strndup(id_str_prefix, 2);
1819 		if (object_dir == NULL) {
1820 			err = got_error_from_errno("strdup");
1821 			goto done;
1822 		}
1823 		err = match_loose_object(id, path_objects, object_dir,
1824 		    id_str_prefix, obj_type, repo);
1825 	} else if (len == 1) {
1826 		int i;
1827 		for (i = 0; i < 0xf; i++) {
1828 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1829 			    == -1) {
1830 				err = got_error_from_errno("asprintf");
1831 				goto done;
1832 			}
1833 			err = match_packed_object(id, repo, object_dir,
1834 			    obj_type);
1835 			if (err)
1836 				goto done;
1837 			err = match_loose_object(id, path_objects, object_dir,
1838 			    id_str_prefix, obj_type, repo);
1839 			if (err)
1840 				goto done;
1841 		}
1842 	} else {
1843 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1844 		goto done;
1845 	}
1846 done:
1847 	free(object_dir);
1848 	if (err) {
1849 		free(*id);
1850 		*id = NULL;
1851 	} else if (*id == NULL) {
1852 		switch (obj_type) {
1853 		case GOT_OBJ_TYPE_BLOB:
1854 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1855 			    GOT_OBJ_LABEL_BLOB, id_str_prefix);
1856 			break;
1857 		case GOT_OBJ_TYPE_TREE:
1858 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1859 			    GOT_OBJ_LABEL_TREE, id_str_prefix);
1860 			break;
1861 		case GOT_OBJ_TYPE_COMMIT:
1862 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1863 			    GOT_OBJ_LABEL_COMMIT, id_str_prefix);
1864 			break;
1865 		case GOT_OBJ_TYPE_TAG:
1866 			err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1867 			    GOT_OBJ_LABEL_TAG, id_str_prefix);
1868 			break;
1869 		default:
1870 			err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1871 			break;
1872 		}
1873 	}
1874 
1875 	return err;
1876 }
1877 
1878 const struct got_error *
1879 got_repo_match_object_id(struct got_object_id **id, char **label,
1880     const char *id_str, int obj_type, struct got_reflist_head *refs,
1881     struct got_repository *repo)
1882 {
1883 	const struct got_error *err;
1884 	struct got_tag_object *tag;
1885 	struct got_reference *ref = NULL;
1886 
1887 	*id = NULL;
1888 	if (label)
1889 		*label = NULL;
1890 
1891 	if (refs) {
1892 		err = got_repo_object_match_tag(&tag, id_str, obj_type,
1893 		    refs, repo);
1894 		if (err == NULL) {
1895 			*id = got_object_id_dup(
1896 			    got_object_tag_get_object_id(tag));
1897 			if (*id == NULL)
1898 				err = got_error_from_errno("got_object_id_dup");
1899 			else if (label && asprintf(label, "refs/tags/%s",
1900 			    got_object_tag_get_name(tag)) == -1) {
1901 				err = got_error_from_errno("asprintf");
1902 				free(*id);
1903 				*id = NULL;
1904 			}
1905 			got_object_tag_close(tag);
1906 			return err;
1907 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1908 		    err->code != GOT_ERR_NO_OBJ)
1909 			return err;
1910 	}
1911 
1912 	err = got_ref_open(&ref, repo, id_str, 0);
1913 	if (err == NULL) {
1914 		err = got_ref_resolve(id, repo, ref);
1915 		if (err)
1916 			goto done;
1917 		if (label) {
1918 			*label = strdup(got_ref_get_name(ref));
1919 			if (*label == NULL) {
1920 				err = got_error_from_errno("strdup");
1921 				goto done;
1922 			}
1923 		}
1924 	} else {
1925 		if (err->code != GOT_ERR_NOT_REF &&
1926 		    err->code != GOT_ERR_BAD_REF_NAME)
1927 			goto done;
1928 		err = got_repo_match_object_id_prefix(id, id_str,
1929 		    obj_type, repo);
1930 		if (err) {
1931 			if (err->code == GOT_ERR_BAD_OBJ_ID_STR)
1932 				err = got_error_not_ref(id_str);
1933 			goto done;
1934 		}
1935 		if (label) {
1936 			err = got_object_id_str(label, *id);
1937 			if (*label == NULL) {
1938 				err = got_error_from_errno("strdup");
1939 				goto done;
1940 			}
1941 		}
1942 	}
1943 done:
1944 	if (ref)
1945 		got_ref_close(ref);
1946 	return err;
1947 }
1948 
1949 const struct got_error *
1950 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1951     int obj_type, struct got_reflist_head *refs, struct got_repository *repo)
1952 {
1953 	const struct got_error *err = NULL;
1954 	struct got_reflist_entry *re;
1955 	struct got_object_id *tag_id;
1956 	int name_is_absolute = (strncmp(name, "refs/", 5) == 0);
1957 
1958 	*tag = NULL;
1959 
1960 	TAILQ_FOREACH(re, refs, entry) {
1961 		const char *refname;
1962 		refname = got_ref_get_name(re->ref);
1963 		if (got_ref_is_symbolic(re->ref))
1964 			continue;
1965 		if (strncmp(refname, "refs/tags/", 10) != 0)
1966 			continue;
1967 		if (!name_is_absolute)
1968 			refname += strlen("refs/tags/");
1969 		if (strcmp(refname, name) != 0)
1970 			continue;
1971 		err = got_ref_resolve(&tag_id, repo, re->ref);
1972 		if (err)
1973 			break;
1974 		err = got_object_open_as_tag(tag, repo, tag_id);
1975 		free(tag_id);
1976 		if (err)
1977 			break;
1978 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1979 		    got_object_tag_get_object_type(*tag) == obj_type)
1980 			break;
1981 		got_object_tag_close(*tag);
1982 		*tag = NULL;
1983 	}
1984 
1985 	if (err == NULL && *tag == NULL)
1986 		err = got_error_fmt(GOT_ERR_NO_OBJ, "%s %s",
1987 		    GOT_OBJ_LABEL_TAG, name);
1988 	return err;
1989 }
1990 
1991 static const struct got_error *
1992 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1993     const char *name, mode_t mode, struct got_object_id *blob_id)
1994 {
1995 	const struct got_error *err = NULL;
1996 
1997 	 *new_te = NULL;
1998 
1999 	*new_te = calloc(1, sizeof(**new_te));
2000 	if (*new_te == NULL)
2001 		return got_error_from_errno("calloc");
2002 
2003 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
2004 	    sizeof((*new_te)->name)) {
2005 		err = got_error(GOT_ERR_NO_SPACE);
2006 		goto done;
2007 	}
2008 
2009 	if (S_ISLNK(mode)) {
2010 		(*new_te)->mode = S_IFLNK;
2011 	} else {
2012 		(*new_te)->mode = S_IFREG;
2013 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
2014 	}
2015 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
2016 done:
2017 	if (err && *new_te) {
2018 		free(*new_te);
2019 		*new_te = NULL;
2020 	}
2021 	return err;
2022 }
2023 
2024 static const struct got_error *
2025 import_file(struct got_tree_entry **new_te, struct dirent *de,
2026     const char *path, struct got_repository *repo)
2027 {
2028 	const struct got_error *err;
2029 	struct got_object_id *blob_id = NULL;
2030 	char *filepath;
2031 	struct stat sb;
2032 
2033 	if (asprintf(&filepath, "%s%s%s", path,
2034 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
2035 		return got_error_from_errno("asprintf");
2036 
2037 	if (lstat(filepath, &sb) != 0) {
2038 		err = got_error_from_errno2("lstat", path);
2039 		goto done;
2040 	}
2041 
2042 	err = got_object_blob_create(&blob_id, filepath, repo);
2043 	if (err)
2044 		goto done;
2045 
2046 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
2047 	    blob_id);
2048 done:
2049 	free(filepath);
2050 	if (err)
2051 		free(blob_id);
2052 	return err;
2053 }
2054 
2055 static const struct got_error *
2056 insert_tree_entry(struct got_tree_entry *new_te,
2057     struct got_pathlist_head *paths)
2058 {
2059 	const struct got_error *err = NULL;
2060 	struct got_pathlist_entry *new_pe;
2061 
2062 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
2063 	if (err)
2064 		return err;
2065 	if (new_pe == NULL)
2066 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
2067 	return NULL;
2068 }
2069 
2070 static const struct got_error *write_tree(struct got_object_id **,
2071     const char *, struct got_pathlist_head *, struct got_repository *,
2072     got_repo_import_cb progress_cb, void *progress_arg);
2073 
2074 static const struct got_error *
2075 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
2076     const char *path, struct got_pathlist_head *ignores,
2077     struct got_repository *repo,
2078     got_repo_import_cb progress_cb, void *progress_arg)
2079 {
2080 	const struct got_error *err;
2081 	struct got_object_id *id = NULL;
2082 	char *subdirpath;
2083 
2084 	if (asprintf(&subdirpath, "%s%s%s", path,
2085 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
2086 		return got_error_from_errno("asprintf");
2087 
2088 	(*new_te) = calloc(1, sizeof(**new_te));
2089 	if (*new_te == NULL)
2090 		return got_error_from_errno("calloc");
2091 	(*new_te)->mode = S_IFDIR;
2092 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
2093 	    sizeof((*new_te)->name)) {
2094 		err = got_error(GOT_ERR_NO_SPACE);
2095 		goto done;
2096 	}
2097 	err = write_tree(&id, subdirpath, ignores,  repo,
2098 	    progress_cb, progress_arg);
2099 	if (err)
2100 		goto done;
2101 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
2102 
2103 done:
2104 	free(id);
2105 	free(subdirpath);
2106 	if (err) {
2107 		free(*new_te);
2108 		*new_te = NULL;
2109 	}
2110 	return err;
2111 }
2112 
2113 static const struct got_error *
2114 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
2115     struct got_pathlist_head *ignores, struct got_repository *repo,
2116     got_repo_import_cb progress_cb, void *progress_arg)
2117 {
2118 	const struct got_error *err = NULL;
2119 	DIR *dir;
2120 	struct dirent *de;
2121 	int nentries;
2122 	struct got_tree_entry *new_te = NULL;
2123 	struct got_pathlist_head paths;
2124 	struct got_pathlist_entry *pe;
2125 
2126 	*new_tree_id = NULL;
2127 
2128 	TAILQ_INIT(&paths);
2129 
2130 	dir = opendir(path_dir);
2131 	if (dir == NULL) {
2132 		err = got_error_from_errno2("opendir", path_dir);
2133 		goto done;
2134 	}
2135 
2136 	nentries = 0;
2137 	while ((de = readdir(dir)) != NULL) {
2138 		int ignore = 0;
2139 		int type;
2140 
2141 		if (strcmp(de->d_name, ".") == 0 ||
2142 		    strcmp(de->d_name, "..") == 0)
2143 			continue;
2144 
2145 		TAILQ_FOREACH(pe, ignores, entry) {
2146 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
2147 				ignore = 1;
2148 				break;
2149 			}
2150 		}
2151 		if (ignore)
2152 			continue;
2153 
2154 		err = got_path_dirent_type(&type, path_dir, de);
2155 		if (err)
2156 			goto done;
2157 
2158 		if (type == DT_DIR) {
2159 			err = import_subdir(&new_te, de, path_dir,
2160 			    ignores, repo, progress_cb, progress_arg);
2161 			if (err) {
2162 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
2163 					goto done;
2164 				err = NULL;
2165 				continue;
2166 			}
2167 		} else if (type == DT_REG || type == DT_LNK) {
2168 			err = import_file(&new_te, de, path_dir, repo);
2169 			if (err)
2170 				goto done;
2171 		} else
2172 			continue;
2173 
2174 		err = insert_tree_entry(new_te, &paths);
2175 		if (err)
2176 			goto done;
2177 		nentries++;
2178 	}
2179 
2180 	if (TAILQ_EMPTY(&paths)) {
2181 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
2182 		    "cannot create tree without any entries");
2183 		goto done;
2184 	}
2185 
2186 	TAILQ_FOREACH(pe, &paths, entry) {
2187 		struct got_tree_entry *te = pe->data;
2188 		char *path;
2189 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
2190 			continue;
2191 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
2192 			err = got_error_from_errno("asprintf");
2193 			goto done;
2194 		}
2195 		err = (*progress_cb)(progress_arg, path);
2196 		free(path);
2197 		if (err)
2198 			goto done;
2199 	}
2200 
2201 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
2202 done:
2203 	if (dir)
2204 		closedir(dir);
2205 	got_pathlist_free(&paths);
2206 	return err;
2207 }
2208 
2209 const struct got_error *
2210 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
2211     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
2212     struct got_repository *repo, got_repo_import_cb progress_cb,
2213     void *progress_arg)
2214 {
2215 	const struct got_error *err;
2216 	struct got_object_id *new_tree_id;
2217 
2218 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
2219 	    progress_cb, progress_arg);
2220 	if (err)
2221 		return err;
2222 
2223 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
2224 	    author, time(NULL), author, time(NULL), logmsg, repo);
2225 	free(new_tree_id);
2226 	return err;
2227 }
2228 
2229 const struct got_error *
2230 got_repo_get_loose_object_info(int *nobjects, off_t *ondisk_size,
2231     struct got_repository *repo)
2232 {
2233 	const struct got_error *err = NULL;
2234 	char *path_objects = NULL, *path = NULL;
2235 	DIR *dir = NULL;
2236 	struct got_object_id id;
2237 	int i;
2238 
2239 	*nobjects = 0;
2240 	*ondisk_size = 0;
2241 
2242 	path_objects = got_repo_get_path_objects(repo);
2243 	if (path_objects == NULL)
2244 		return got_error_from_errno("got_repo_get_path_objects");
2245 
2246 	for (i = 0; i <= 0xff; i++) {
2247 		struct dirent *dent;
2248 
2249 		if (asprintf(&path, "%s/%.2x", path_objects, i) == -1) {
2250 			err = got_error_from_errno("asprintf");
2251 			break;
2252 		}
2253 
2254 		dir = opendir(path);
2255 		if (dir == NULL) {
2256 			if (errno == ENOENT) {
2257 				err = NULL;
2258 				continue;
2259 			}
2260 			err = got_error_from_errno2("opendir", path);
2261 			break;
2262 		}
2263 
2264 		while ((dent = readdir(dir)) != NULL) {
2265 			char *id_str;
2266 			int fd;
2267 			struct stat sb;
2268 
2269 			if (strcmp(dent->d_name, ".") == 0 ||
2270 			    strcmp(dent->d_name, "..") == 0)
2271 				continue;
2272 
2273 			if (asprintf(&id_str, "%.2x%s", i, dent->d_name) == -1) {
2274 				err = got_error_from_errno("asprintf");
2275 				goto done;
2276 			}
2277 
2278 			if (!got_parse_sha1_digest(id.sha1, id_str)) {
2279 				free(id_str);
2280 				continue;
2281 			}
2282 			free(id_str);
2283 
2284 			err = got_object_open_loose_fd(&fd, &id, repo);
2285 			if (err)
2286 				goto done;
2287 
2288 			if (fstat(fd, &sb) == -1) {
2289 				err = got_error_from_errno("fstat");
2290 				close(fd);
2291 				goto done;
2292 			}
2293 			(*nobjects)++;
2294 			(*ondisk_size) += sb.st_size;
2295 
2296 			if (close(fd) == -1) {
2297 				err = got_error_from_errno("close");
2298 				goto done;
2299 			}
2300 		}
2301 
2302 		if (closedir(dir) != 0) {
2303 			err = got_error_from_errno("closedir");
2304 			goto done;
2305 		}
2306 		dir = NULL;
2307 
2308 		free(path);
2309 		path = NULL;
2310 	}
2311 done:
2312 	if (dir && closedir(dir) != 0 && err == NULL)
2313 		err = got_error_from_errno("closedir");
2314 
2315 	if (err) {
2316 		*nobjects = 0;
2317 		*ondisk_size = 0;
2318 	}
2319 	free(path_objects);
2320 	free(path);
2321 	return err;
2322 }
2323 
2324 const struct got_error *
2325 got_repo_get_packfile_info(int *npackfiles, int *nobjects,
2326     off_t *total_packsize, struct got_repository *repo)
2327 {
2328 	const struct got_error *err = NULL;
2329 	DIR *packdir = NULL;
2330 	struct dirent *dent;
2331 	struct got_packidx *packidx = NULL;
2332 	char *path_packidx;
2333 	char *path_packfile;
2334 	int packdir_fd;
2335 	struct stat sb;
2336 
2337 	*npackfiles = 0;
2338 	*nobjects = 0;
2339 	*total_packsize = 0;
2340 
2341 	packdir_fd = openat(got_repo_get_fd(repo),
2342 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
2343 	if (packdir_fd == -1) {
2344 		return got_error_from_errno_fmt("openat: %s/%s",
2345 		    got_repo_get_path_git_dir(repo),
2346 		    GOT_OBJECTS_PACK_DIR);
2347 	}
2348 
2349 	packdir = fdopendir(packdir_fd);
2350 	if (packdir == NULL) {
2351 		err = got_error_from_errno("fdopendir");
2352 		goto done;
2353 	}
2354 
2355 	while ((dent = readdir(packdir)) != NULL) {
2356 		if (!got_repo_is_packidx_filename(dent->d_name, dent->d_namlen))
2357 			continue;
2358 
2359 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
2360 		    dent->d_name) == -1) {
2361 			err = got_error_from_errno("asprintf");
2362 			goto done;
2363 		}
2364 
2365 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
2366 		    path_packidx, 0);
2367 		free(path_packidx);
2368 		if (err)
2369 			goto done;
2370 
2371 		if (fstat(packidx->fd, &sb) == -1)
2372 			goto done;
2373 		*total_packsize += sb.st_size;
2374 
2375 		err = got_packidx_get_packfile_path(&path_packfile,
2376 		    packidx->path_packidx);
2377 		if (err)
2378 			goto done;
2379 
2380 		if (fstatat(got_repo_get_fd(repo), path_packfile, &sb,
2381 		    0) == -1) {
2382 			free(path_packfile);
2383 			goto done;
2384 		}
2385 		free(path_packfile);
2386 		*total_packsize += sb.st_size;
2387 
2388 		*nobjects += be32toh(packidx->hdr.fanout_table[0xff]);
2389 
2390 		(*npackfiles)++;
2391 
2392 		got_packidx_close(packidx);
2393 		packidx = NULL;
2394 	}
2395 done:
2396 	if (packidx)
2397 		got_packidx_close(packidx);
2398 	if (packdir && closedir(packdir) != 0 && err == NULL)
2399 		err = got_error_from_errno("closedir");
2400 	if (err) {
2401 		*npackfiles = 0;
2402 		*nobjects = 0;
2403 		*total_packsize = 0;
2404 	}
2405 	return err;
2406 }
2407 
2408 RB_GENERATE(got_packidx_bloom_filter_tree, got_packidx_bloom_filter, entry,
2409     got_packidx_bloom_filter_cmp);