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Date:: Fri Jan 22 11:05:05 2021 UTC
Message:: make close(2) failure checks consistent; check 'close() == -1' everywhere ok millert, naddy
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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/uio.h>
20 #include <sys/socket.h>
21 #include <sys/stat.h>
22 #include <sys/mman.h>
23 
24 #include <ctype.h>
25 #include <endian.h>
26 #include <fcntl.h>
27 #include <fnmatch.h>
28 #include <limits.h>
29 #include <dirent.h>
30 #include <stdlib.h>
31 #include <stdio.h>
32 #include <sha1.h>
33 #include <string.h>
34 #include <time.h>
35 #include <unistd.h>
36 #include <zlib.h>
37 #include <errno.h>
38 #include <libgen.h>
39 #include <stdint.h>
40 #include <imsg.h>
41 #include <uuid.h>
42 
43 #include "got_error.h"
44 #include "got_reference.h"
45 #include "got_repository.h"
46 #include "got_path.h"
47 #include "got_cancel.h"
48 #include "got_worktree.h"
49 #include "got_object.h"
50 
51 #include "got_lib_delta.h"
52 #include "got_lib_inflate.h"
53 #include "got_lib_object.h"
54 #include "got_lib_object_parse.h"
55 #include "got_lib_object_create.h"
56 #include "got_lib_pack.h"
57 #include "got_lib_privsep.h"
58 #include "got_lib_worktree.h"
59 #include "got_lib_sha1.h"
60 #include "got_lib_object_cache.h"
61 #include "got_lib_repository.h"
62 #include "got_lib_gotconfig.h"
63 
64 #ifndef nitems
65 #define nitems(_a) (sizeof(_a) / sizeof((_a)[0]))
66 #endif
67 
68 const char *
69 got_repo_get_path(struct got_repository *repo)
70 {
71 	return repo->path;
72 }
73 
74 const char *
75 got_repo_get_path_git_dir(struct got_repository *repo)
76 {
77 	return repo->path_git_dir;
78 }
79 
80 int
81 got_repo_get_fd(struct got_repository *repo)
82 {
83 	return repo->gitdir_fd;
84 }
85 
86 const char *
87 got_repo_get_gitconfig_author_name(struct got_repository *repo)
88 {
89 	return repo->gitconfig_author_name;
90 }
91 
92 const char *
93 got_repo_get_gitconfig_author_email(struct got_repository *repo)
94 {
95 	return repo->gitconfig_author_email;
96 }
97 
98 const char *
99 got_repo_get_global_gitconfig_author_name(struct got_repository *repo)
100 {
101 	return repo->global_gitconfig_author_name;
102 }
103 
104 const char *
105 got_repo_get_global_gitconfig_author_email(struct got_repository *repo)
106 {
107 	return repo->global_gitconfig_author_email;
108 }
109 
110 const char *
111 got_repo_get_gitconfig_owner(struct got_repository *repo)
112 {
113 	return repo->gitconfig_owner;
114 }
115 
116 int
117 got_repo_is_bare(struct got_repository *repo)
118 {
119 	return (strcmp(repo->path, repo->path_git_dir) == 0);
120 }
121 
122 static char *
123 get_path_git_child(struct got_repository *repo, const char *basename)
124 {
125 	char *path_child;
126 
127 	if (asprintf(&path_child, "%s/%s", repo->path_git_dir,
128 	    basename) == -1)
129 		return NULL;
130 
131 	return path_child;
132 }
133 
134 char *
135 got_repo_get_path_objects(struct got_repository *repo)
136 {
137 	return get_path_git_child(repo, GOT_OBJECTS_DIR);
138 }
139 
140 char *
141 got_repo_get_path_objects_pack(struct got_repository *repo)
142 {
143 	return get_path_git_child(repo, GOT_OBJECTS_PACK_DIR);
144 }
145 
146 char *
147 got_repo_get_path_refs(struct got_repository *repo)
148 {
149 	return get_path_git_child(repo, GOT_REFS_DIR);
150 }
151 
152 char *
153 got_repo_get_path_packed_refs(struct got_repository *repo)
154 {
155 	return get_path_git_child(repo, GOT_PACKED_REFS_FILE);
156 }
157 
158 static char *
159 get_path_head(struct got_repository *repo)
160 {
161 	return get_path_git_child(repo, GOT_HEAD_FILE);
162 }
163 
164 char *
165 got_repo_get_path_gitconfig(struct got_repository *repo)
166 {
167 	return get_path_git_child(repo, GOT_GITCONFIG);
168 }
169 
170 char *
171 got_repo_get_path_gotconfig(struct got_repository *repo)
172 {
173 	return get_path_git_child(repo, GOT_GOTCONFIG_FILENAME);
174 }
175 
176 const struct got_gotconfig *
177 got_repo_get_gotconfig(struct got_repository *repo)
178 {
179 	return repo->gotconfig;
180 }
181 
182 void
183 got_repo_get_gitconfig_remotes(int *nremotes,
184     const struct got_remote_repo **remotes, struct got_repository *repo)
185 {
186 	*nremotes = repo->ngitconfig_remotes;
187 	*remotes = repo->gitconfig_remotes;
188 }
189 
190 static int
191 is_git_repo(struct got_repository *repo)
192 {
193 	const char *path_git = got_repo_get_path_git_dir(repo);
194 	char *path_objects = got_repo_get_path_objects(repo);
195 	char *path_refs = got_repo_get_path_refs(repo);
196 	char *path_head = get_path_head(repo);
197 	int ret = 0;
198 	struct stat sb;
199 	struct got_reference *head_ref;
200 
201 	if (lstat(path_git, &sb) == -1)
202 		goto done;
203 	if (!S_ISDIR(sb.st_mode))
204 		goto done;
205 
206 	if (lstat(path_objects, &sb) == -1)
207 		goto done;
208 	if (!S_ISDIR(sb.st_mode))
209 		goto done;
210 
211 	if (lstat(path_refs, &sb) == -1)
212 		goto done;
213 	if (!S_ISDIR(sb.st_mode))
214 		goto done;
215 
216 	if (lstat(path_head, &sb) == -1)
217 		goto done;
218 	if (!S_ISREG(sb.st_mode))
219 		goto done;
220 
221 	/* Check if the HEAD reference can be opened. */
222 	if (got_ref_open(&head_ref, repo, GOT_REF_HEAD, 0) != NULL)
223 		goto done;
224 	got_ref_close(head_ref);
225 
226 	ret = 1;
227 done:
228 	free(path_objects);
229 	free(path_refs);
230 	free(path_head);
231 	return ret;
232 
233 }
234 
235 const struct got_error *
236 got_repo_cache_object(struct got_repository *repo, struct got_object_id *id,
237     struct got_object *obj)
238 {
239 #ifndef GOT_NO_OBJ_CACHE
240 	const struct got_error *err = NULL;
241 	err = got_object_cache_add(&repo->objcache, id, obj);
242 	if (err) {
243 		if (err->code == GOT_ERR_OBJ_EXISTS ||
244 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
245 			err = NULL;
246 		return err;
247 	}
248 	obj->refcnt++;
249 #endif
250 	return NULL;
251 }
252 
253 struct got_object *
254 got_repo_get_cached_object(struct got_repository *repo,
255     struct got_object_id *id)
256 {
257 	return (struct got_object *)got_object_cache_get(&repo->objcache, id);
258 }
259 
260 const struct got_error *
261 got_repo_cache_tree(struct got_repository *repo, struct got_object_id *id,
262     struct got_tree_object *tree)
263 {
264 #ifndef GOT_NO_OBJ_CACHE
265 	const struct got_error *err = NULL;
266 	err = got_object_cache_add(&repo->treecache, id, tree);
267 	if (err) {
268 		if (err->code == GOT_ERR_OBJ_EXISTS ||
269 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
270 			err = NULL;
271 		return err;
272 	}
273 	tree->refcnt++;
274 #endif
275 	return NULL;
276 }
277 
278 struct got_tree_object *
279 got_repo_get_cached_tree(struct got_repository *repo,
280     struct got_object_id *id)
281 {
282 	return (struct got_tree_object *)got_object_cache_get(
283 	    &repo->treecache, id);
284 }
285 
286 const struct got_error *
287 got_repo_cache_commit(struct got_repository *repo, struct got_object_id *id,
288     struct got_commit_object *commit)
289 {
290 #ifndef GOT_NO_OBJ_CACHE
291 	const struct got_error *err = NULL;
292 	err = got_object_cache_add(&repo->commitcache, id, commit);
293 	if (err) {
294 		if (err->code == GOT_ERR_OBJ_EXISTS ||
295 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
296 			err = NULL;
297 		return err;
298 	}
299 	commit->refcnt++;
300 #endif
301 	return NULL;
302 }
303 
304 struct got_commit_object *
305 got_repo_get_cached_commit(struct got_repository *repo,
306     struct got_object_id *id)
307 {
308 	return (struct got_commit_object *)got_object_cache_get(
309 	    &repo->commitcache, id);
310 }
311 
312 const struct got_error *
313 got_repo_cache_tag(struct got_repository *repo, struct got_object_id *id,
314     struct got_tag_object *tag)
315 {
316 #ifndef GOT_NO_OBJ_CACHE
317 	const struct got_error *err = NULL;
318 	err = got_object_cache_add(&repo->tagcache, id, tag);
319 	if (err) {
320 		if (err->code == GOT_ERR_OBJ_EXISTS ||
321 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
322 			err = NULL;
323 		return err;
324 	}
325 	tag->refcnt++;
326 #endif
327 	return NULL;
328 }
329 
330 struct got_tag_object *
331 got_repo_get_cached_tag(struct got_repository *repo, struct got_object_id *id)
332 {
333 	return (struct got_tag_object *)got_object_cache_get(
334 	    &repo->tagcache, id);
335 }
336 
337 const struct got_error *
338 open_repo(struct got_repository *repo, const char *path)
339 {
340 	const struct got_error *err = NULL;
341 
342 	repo->gitdir_fd = -1;
343 
344 	/* bare git repository? */
345 	repo->path_git_dir = strdup(path);
346 	if (repo->path_git_dir == NULL)
347 		return got_error_from_errno("strdup");
348 	if (is_git_repo(repo)) {
349 		repo->path = strdup(repo->path_git_dir);
350 		if (repo->path == NULL) {
351 			err = got_error_from_errno("strdup");
352 			goto done;
353 		}
354 		repo->gitdir_fd = open(repo->path_git_dir, O_DIRECTORY);
355 		if (repo->gitdir_fd == -1) {
356 			err = got_error_from_errno2("open",
357 			    repo->path_git_dir);
358 			goto done;
359 		}
360 		return NULL;
361 	}
362 
363 	/* git repository with working tree? */
364 	free(repo->path_git_dir);
365 	repo->path_git_dir = NULL;
366 	if (asprintf(&repo->path_git_dir, "%s/%s", path, GOT_GIT_DIR) == -1) {
367 		err = got_error_from_errno("asprintf");
368 		goto done;
369 	}
370 	if (is_git_repo(repo)) {
371 		repo->path = strdup(path);
372 		if (repo->path == NULL) {
373 			err = got_error_from_errno("strdup");
374 			goto done;
375 		}
376 		repo->gitdir_fd = open(repo->path_git_dir, O_DIRECTORY);
377 		if (repo->gitdir_fd == -1) {
378 			err = got_error_from_errno2("open",
379 			    repo->path_git_dir);
380 			goto done;
381 		}
382 		return NULL;
383 	}
384 
385 	err = got_error(GOT_ERR_NOT_GIT_REPO);
386 done:
387 	if (err) {
388 		free(repo->path);
389 		repo->path = NULL;
390 		free(repo->path_git_dir);
391 		repo->path_git_dir = NULL;
392 		if (repo->gitdir_fd != -1)
393 			close(repo->gitdir_fd);
394 		repo->gitdir_fd = -1;
395 
396 	}
397 	return err;
398 }
399 
400 static const struct got_error *
401 parse_gitconfig_file(int *gitconfig_repository_format_version,
402     char **gitconfig_author_name, char **gitconfig_author_email,
403     struct got_remote_repo **remotes, int *nremotes,
404     char **gitconfig_owner, char ***extensions, int *nextensions,
405     const char *gitconfig_path)
406 {
407 	const struct got_error *err = NULL, *child_err = NULL;
408 	int fd = -1;
409 	int imsg_fds[2] = { -1, -1 };
410 	pid_t pid;
411 	struct imsgbuf *ibuf;
412 
413 	*gitconfig_repository_format_version = 0;
414 	if (extensions)
415 		*extensions = NULL;
416 	if (nextensions)
417 		*nextensions = 0;
418 	*gitconfig_author_name = NULL;
419 	*gitconfig_author_email = NULL;
420 	if (remotes)
421 		*remotes = NULL;
422 	if (nremotes)
423 		*nremotes = 0;
424 	if (gitconfig_owner)
425 		*gitconfig_owner = NULL;
426 
427 	fd = open(gitconfig_path, O_RDONLY);
428 	if (fd == -1) {
429 		if (errno == ENOENT)
430 			return NULL;
431 		return got_error_from_errno2("open", gitconfig_path);
432 	}
433 
434 	ibuf = calloc(1, sizeof(*ibuf));
435 	if (ibuf == NULL) {
436 		err = got_error_from_errno("calloc");
437 		goto done;
438 	}
439 
440 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_fds) == -1) {
441 		err = got_error_from_errno("socketpair");
442 		goto done;
443 	}
444 
445 	pid = fork();
446 	if (pid == -1) {
447 		err = got_error_from_errno("fork");
448 		goto done;
449 	} else if (pid == 0) {
450 		got_privsep_exec_child(imsg_fds, GOT_PATH_PROG_READ_GITCONFIG,
451 		    gitconfig_path);
452 		/* not reached */
453 	}
454 
455 	if (close(imsg_fds[1]) == -1) {
456 		err = got_error_from_errno("close");
457 		goto done;
458 	}
459 	imsg_fds[1] = -1;
460 	imsg_init(ibuf, imsg_fds[0]);
461 
462 	err = got_privsep_send_gitconfig_parse_req(ibuf, fd);
463 	if (err)
464 		goto done;
465 	fd = -1;
466 
467 	err = got_privsep_send_gitconfig_repository_format_version_req(ibuf);
468 	if (err)
469 		goto done;
470 
471 	err = got_privsep_recv_gitconfig_int(
472 	    gitconfig_repository_format_version, ibuf);
473 	if (err)
474 		goto done;
475 
476 	if (extensions && nextensions) {
477 		err = got_privsep_send_gitconfig_repository_extensions_req(
478 		    ibuf);
479 		if (err)
480 			goto done;
481 		err = got_privsep_recv_gitconfig_int(nextensions, ibuf);
482 		if (err)
483 			goto done;
484 		if (*nextensions > 0) {
485 			int i;
486 			*extensions = calloc(*nextensions, sizeof(char *));
487 			if (*extensions == NULL) {
488 				err = got_error_from_errno("calloc");
489 				goto done;
490 			}
491 			for (i = 0; i < *nextensions; i++) {
492 				char *ext;
493 				err = got_privsep_recv_gitconfig_str(&ext,
494 				    ibuf);
495 				if (err)
496 					goto done;
497 				(*extensions)[i] = ext;
498 			}
499 		}
500 	}
501 
502 	err = got_privsep_send_gitconfig_author_name_req(ibuf);
503 	if (err)
504 		goto done;
505 
506 	err = got_privsep_recv_gitconfig_str(gitconfig_author_name, ibuf);
507 	if (err)
508 		goto done;
509 
510 	err = got_privsep_send_gitconfig_author_email_req(ibuf);
511 	if (err)
512 		goto done;
513 
514 	err = got_privsep_recv_gitconfig_str(gitconfig_author_email, ibuf);
515 	if (err)
516 		goto done;
517 
518 	if (remotes && nremotes) {
519 		err = got_privsep_send_gitconfig_remotes_req(ibuf);
520 		if (err)
521 			goto done;
522 
523 		err = got_privsep_recv_gitconfig_remotes(remotes,
524 		    nremotes, ibuf);
525 		if (err)
526 			goto done;
527 	}
528 
529 	if (gitconfig_owner) {
530 		err = got_privsep_send_gitconfig_owner_req(ibuf);
531 		if (err)
532 			goto done;
533 		err = got_privsep_recv_gitconfig_str(gitconfig_owner, ibuf);
534 		if (err)
535 			goto done;
536 	}
537 
538 	imsg_clear(ibuf);
539 	err = got_privsep_send_stop(imsg_fds[0]);
540 	child_err = got_privsep_wait_for_child(pid);
541 	if (child_err && err == NULL)
542 		err = child_err;
543 done:
544 	if (imsg_fds[0] != -1 && close(imsg_fds[0]) == -1 && err == NULL)
545 		err = got_error_from_errno("close");
546 	if (imsg_fds[1] != -1 && close(imsg_fds[1]) == -1 && err == NULL)
547 		err = got_error_from_errno("close");
548 	if (fd != -1 && close(fd) == -1 && err == NULL)
549 		err = got_error_from_errno2("close", gitconfig_path);
550 	free(ibuf);
551 	return err;
552 }
553 
554 static const struct got_error *
555 read_gitconfig(struct got_repository *repo, const char *global_gitconfig_path)
556 {
557 	const struct got_error *err = NULL;
558 	char *repo_gitconfig_path = NULL;
559 
560 	if (global_gitconfig_path) {
561 		/* Read settings from ~/.gitconfig. */
562 		int dummy_repo_version;
563 		err = parse_gitconfig_file(&dummy_repo_version,
564 		    &repo->global_gitconfig_author_name,
565 		    &repo->global_gitconfig_author_email,
566 		    NULL, NULL, NULL, NULL, NULL, global_gitconfig_path);
567 		if (err)
568 			return err;
569 	}
570 
571 	/* Read repository's .git/config file. */
572 	repo_gitconfig_path = got_repo_get_path_gitconfig(repo);
573 	if (repo_gitconfig_path == NULL)
574 		return got_error_from_errno("got_repo_get_path_gitconfig");
575 
576 	err = parse_gitconfig_file(&repo->gitconfig_repository_format_version,
577 	    &repo->gitconfig_author_name, &repo->gitconfig_author_email,
578 	    &repo->gitconfig_remotes, &repo->ngitconfig_remotes,
579 	    &repo->gitconfig_owner, &repo->extensions, &repo->nextensions,
580 	    repo_gitconfig_path);
581 	if (err)
582 		goto done;
583 done:
584 	free(repo_gitconfig_path);
585 	return err;
586 }
587 
588 static const struct got_error *
589 read_gotconfig(struct got_repository *repo)
590 {
591 	const struct got_error *err = NULL;
592 	char *gotconfig_path;
593 
594 	gotconfig_path = got_repo_get_path_gotconfig(repo);
595 	if (gotconfig_path == NULL)
596 		return got_error_from_errno("got_repo_get_path_gotconfig");
597 
598 	err = got_gotconfig_read(&repo->gotconfig, gotconfig_path);
599 	free(gotconfig_path);
600 	return err;
601 }
602 
603 /* Supported repository format extensions. */
604 static const char *repo_extensions[] = {
605 	"noop",			/* Got supports repository format version 1. */
606 	"preciousObjects",	/* Got has no garbage collection yet. */
607 	"worktreeConfig",	/* Got does not care about Git work trees. */
608 };
609 
610 const struct got_error *
611 got_repo_open(struct got_repository **repop, const char *path,
612     const char *global_gitconfig_path)
613 {
614 	struct got_repository *repo = NULL;
615 	const struct got_error *err = NULL;
616 	char *repo_path = NULL;
617 	size_t i;
618 
619 	*repop = NULL;
620 
621 	repo = calloc(1, sizeof(*repo));
622 	if (repo == NULL) {
623 		err = got_error_from_errno("calloc");
624 		goto done;
625 	}
626 
627 	for (i = 0; i < nitems(repo->privsep_children); i++) {
628 		memset(&repo->privsep_children[i], 0,
629 		    sizeof(repo->privsep_children[0]));
630 		repo->privsep_children[i].imsg_fd = -1;
631 	}
632 
633 	err = got_object_cache_init(&repo->objcache,
634 	    GOT_OBJECT_CACHE_TYPE_OBJ);
635 	if (err)
636 		goto done;
637 	err = got_object_cache_init(&repo->treecache,
638 	    GOT_OBJECT_CACHE_TYPE_TREE);
639 	if (err)
640 		goto done;
641 	err = got_object_cache_init(&repo->commitcache,
642 	    GOT_OBJECT_CACHE_TYPE_COMMIT);
643 	if (err)
644 		goto done;
645 	err = got_object_cache_init(&repo->tagcache,
646 	    GOT_OBJECT_CACHE_TYPE_TAG);
647 	if (err)
648 		goto done;
649 
650 	repo_path = realpath(path, NULL);
651 	if (repo_path == NULL) {
652 		err = got_error_from_errno2("realpath", path);
653 		goto done;
654 	}
655 
656 	for (;;) {
657 		char *parent_path;
658 
659 		err = open_repo(repo, repo_path);
660 		if (err == NULL)
661 			break;
662 		if (err->code != GOT_ERR_NOT_GIT_REPO)
663 			goto done;
664 		if (repo_path[0] == '/' && repo_path[1] == '\0') {
665 			err = got_error(GOT_ERR_NOT_GIT_REPO);
666 			goto done;
667 		}
668 		err = got_path_dirname(&parent_path, repo_path);
669 		if (err)
670 			goto done;
671 		free(repo_path);
672 		repo_path = parent_path;
673 	}
674 
675 	err = read_gotconfig(repo);
676 	if (err)
677 		goto done;
678 
679 	err = read_gitconfig(repo, global_gitconfig_path);
680 	if (err)
681 		goto done;
682 	if (repo->gitconfig_repository_format_version != 0)
683 		err = got_error_path(path, GOT_ERR_GIT_REPO_FORMAT);
684 	for (i = 0; i < repo->nextensions; i++) {
685 		char *ext = repo->extensions[i];
686 		int j, supported = 0;
687 		for (j = 0; j < nitems(repo_extensions); j++) {
688 			if (strcmp(ext, repo_extensions[j]) == 0) {
689 				supported = 1;
690 				break;
691 			}
692 		}
693 		if (!supported) {
694 			err = got_error_path(ext, GOT_ERR_GIT_REPO_EXT);
695 			goto done;
696 		}
697 	}
698 done:
699 	if (err)
700 		got_repo_close(repo);
701 	else
702 		*repop = repo;
703 	free(repo_path);
704 	return err;
705 }
706 
707 const struct got_error *
708 got_repo_close(struct got_repository *repo)
709 {
710 	const struct got_error *err = NULL, *child_err;
711 	size_t i;
712 
713 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
714 		if (repo->packidx_cache[i] == NULL)
715 			break;
716 		got_packidx_close(repo->packidx_cache[i]);
717 	}
718 
719 	for (i = 0; i < nitems(repo->packs); i++) {
720 		if (repo->packs[i].path_packfile == NULL)
721 			break;
722 		got_pack_close(&repo->packs[i]);
723 	}
724 
725 	free(repo->path);
726 	free(repo->path_git_dir);
727 
728 	got_object_cache_close(&repo->objcache);
729 	got_object_cache_close(&repo->treecache);
730 	got_object_cache_close(&repo->commitcache);
731 	got_object_cache_close(&repo->tagcache);
732 
733 	for (i = 0; i < nitems(repo->privsep_children); i++) {
734 		if (repo->privsep_children[i].imsg_fd == -1)
735 			continue;
736 		imsg_clear(repo->privsep_children[i].ibuf);
737 		free(repo->privsep_children[i].ibuf);
738 		err = got_privsep_send_stop(repo->privsep_children[i].imsg_fd);
739 		child_err = got_privsep_wait_for_child(
740 		    repo->privsep_children[i].pid);
741 		if (child_err && err == NULL)
742 			err = child_err;
743 		if (close(repo->privsep_children[i].imsg_fd) == -1 &&
744 		    err == NULL)
745 			err = got_error_from_errno("close");
746 	}
747 
748 	if (repo->gotconfig)
749 		got_gotconfig_free(repo->gotconfig);
750 	free(repo->gitconfig_author_name);
751 	free(repo->gitconfig_author_email);
752 	for (i = 0; i < repo->ngitconfig_remotes; i++)
753 		got_repo_free_remote_repo_data(&repo->gitconfig_remotes[i]);
754 	free(repo->gitconfig_remotes);
755 	for (i = 0; i < repo->nextensions; i++)
756 		free(repo->extensions[i]);
757 	free(repo->extensions);
758 	free(repo);
759 
760 	return err;
761 }
762 
763 void
764 got_repo_free_remote_repo_data(struct got_remote_repo *repo)
765 {
766 	int i;
767 
768 	free(repo->name);
769 	repo->name = NULL;
770 	free(repo->url);
771 	repo->url = NULL;
772 	for (i = 0; i < repo->nbranches; i++)
773 		free(repo->branches[i]);
774 	free(repo->branches);
775 	repo->branches = NULL;
776 	repo->nbranches = 0;
777 }
778 
779 const struct got_error *
780 got_repo_map_path(char **in_repo_path, struct got_repository *repo,
781     const char *input_path)
782 {
783 	const struct got_error *err = NULL;
784 	const char *repo_abspath = NULL;
785 	size_t repolen, len;
786 	char *canonpath, *path = NULL;
787 
788 	*in_repo_path = NULL;
789 
790 	canonpath = strdup(input_path);
791 	if (canonpath == NULL) {
792 		err = got_error_from_errno("strdup");
793 		goto done;
794 	}
795 	err = got_canonpath(input_path, canonpath, strlen(canonpath) + 1);
796 	if (err)
797 		goto done;
798 
799 	repo_abspath = got_repo_get_path(repo);
800 
801 	if (canonpath[0] == '\0') {
802 		path = strdup(canonpath);
803 		if (path == NULL) {
804 			err = got_error_from_errno("strdup");
805 			goto done;
806 		}
807 	} else {
808 		path = realpath(canonpath, NULL);
809 		if (path == NULL) {
810 			if (errno != ENOENT) {
811 				err = got_error_from_errno2("realpath",
812 				    canonpath);
813 				goto done;
814 			}
815 			/*
816 			 * Path is not on disk.
817 			 * Assume it is already relative to repository root.
818 			 */
819 			path = strdup(canonpath);
820 			if (path == NULL) {
821 				err = got_error_from_errno("strdup");
822 				goto done;
823 			}
824 		}
825 
826 		repolen = strlen(repo_abspath);
827 		len = strlen(path);
828 
829 
830 		if (strcmp(path, repo_abspath) == 0) {
831 			free(path);
832 			path = strdup("");
833 			if (path == NULL) {
834 				err = got_error_from_errno("strdup");
835 				goto done;
836 			}
837 		} else if (len > repolen &&
838 		    got_path_is_child(path, repo_abspath, repolen)) {
839 			/* Matched an on-disk path inside repository. */
840 			if (got_repo_is_bare(repo)) {
841 				/*
842 				 * Matched an on-disk path inside repository
843 				 * database. Treat input as repository-relative.
844 				 */
845 				 free(path);
846 				 path = canonpath;
847 				 canonpath = NULL;
848 			} else {
849 				char *child;
850 				/* Strip common prefix with repository path. */
851 				err = got_path_skip_common_ancestor(&child,
852 				    repo_abspath, path);
853 				if (err)
854 					goto done;
855 				free(path);
856 				path = child;
857 			}
858 		} else {
859 			/*
860 			 * Matched unrelated on-disk path.
861 			 * Treat input as repository-relative.
862 			 */
863 			 free(path);
864 			 path = canonpath;
865 			 canonpath = NULL;
866 		}
867 	}
868 
869 	/* Make in-repository path absolute */
870 	if (path[0] != '/') {
871 		char *abspath;
872 		if (asprintf(&abspath, "/%s", path) == -1) {
873 			err = got_error_from_errno("asprintf");
874 			goto done;
875 		}
876 		free(path);
877 		path = abspath;
878 	}
879 
880 done:
881 	free(canonpath);
882 	if (err)
883 		free(path);
884 	else
885 		*in_repo_path = path;
886 	return err;
887 }
888 
889 static const struct got_error *
890 cache_packidx(struct got_repository *repo, struct got_packidx *packidx,
891     const char *path_packidx)
892 {
893 	const struct got_error *err = NULL;
894 	size_t i;
895 
896 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
897 		if (repo->packidx_cache[i] == NULL)
898 			break;
899 		if (strcmp(repo->packidx_cache[i]->path_packidx,
900 		    path_packidx) == 0) {
901 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
902 		}
903 	}
904 	if (i == nitems(repo->packidx_cache)) {
905 		err = got_packidx_close(repo->packidx_cache[i - 1]);
906 		if (err)
907 			return err;
908 	}
909 
910 	/*
911 	 * Insert the new pack index at the front so it will
912 	 * be searched first in the future.
913 	 */
914 	memmove(&repo->packidx_cache[1], &repo->packidx_cache[0],
915 	    sizeof(repo->packidx_cache) -
916 	    sizeof(repo->packidx_cache[0]));
917 	repo->packidx_cache[0] = packidx;
918 
919 	return NULL;
920 }
921 
922 static int
923 is_packidx_filename(const char *name, size_t len)
924 {
925 	if (len != GOT_PACKIDX_NAMELEN)
926 		return 0;
927 
928 	if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
929 		return 0;
930 
931 	if (strcmp(name + strlen(GOT_PACK_PREFIX) +
932 	    SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
933 		return 0;
934 
935 	return 1;
936 }
937 
938 const struct got_error *
939 got_repo_search_packidx(struct got_packidx **packidx, int *idx,
940     struct got_repository *repo, struct got_object_id *id)
941 {
942 	const struct got_error *err;
943 	DIR *packdir = NULL;
944 	struct dirent *dent;
945 	char *path_packidx;
946 	size_t i;
947 	int packdir_fd;
948 
949 	/* Search pack index cache. */
950 	for (i = 0; i < nitems(repo->packidx_cache); i++) {
951 		if (repo->packidx_cache[i] == NULL)
952 			break;
953 		*idx = got_packidx_get_object_idx(repo->packidx_cache[i], id);
954 		if (*idx != -1) {
955 			*packidx = repo->packidx_cache[i];
956 			/*
957 			 * Move this cache entry to the front. Repeatedly
958 			 * searching a wrong pack index can be expensive.
959 			 */
960 			if (i > 0) {
961 				struct got_packidx *p;
962 				p = repo->packidx_cache[0];
963 				repo->packidx_cache[0] = *packidx;
964 				repo->packidx_cache[i] = p;
965 			}
966 			return NULL;
967 		}
968 	}
969 	/* No luck. Search the filesystem. */
970 
971 	packdir_fd = openat(got_repo_get_fd(repo),
972 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
973 	if (packdir_fd == -1) {
974 		if (errno == ENOENT)
975 			err = got_error_no_obj(id);
976 		else
977 			err = got_error_from_errno_fmt("openat: %s/%s",
978 			    got_repo_get_path_git_dir(repo),
979 			    GOT_OBJECTS_PACK_DIR);
980 		goto done;
981 	}
982 
983 	packdir = fdopendir(packdir_fd);
984 	if (packdir == NULL) {
985 		err = got_error_from_errno("fdopendir");
986 		goto done;
987 	}
988 
989 	while ((dent = readdir(packdir)) != NULL) {
990 		int is_cached = 0;
991 
992 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
993 			continue;
994 
995 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
996 		    dent->d_name) == -1) {
997 			err = got_error_from_errno("asprintf");
998 			goto done;
999 		}
1000 
1001 		for (i = 0; i < nitems(repo->packidx_cache); i++) {
1002 			if (repo->packidx_cache[i] == NULL)
1003 				break;
1004 			if (strcmp(repo->packidx_cache[i]->path_packidx,
1005 			    path_packidx) == 0) {
1006 				is_cached = 1;
1007 				break;
1008 			}
1009 		}
1010 		if (is_cached) {
1011 			free(path_packidx);
1012 			continue; /* already searched */
1013 		}
1014 
1015 		err = got_packidx_open(packidx, got_repo_get_fd(repo),
1016 		    path_packidx, 0);
1017 		if (err) {
1018 			free(path_packidx);
1019 			goto done;
1020 		}
1021 
1022 		err = cache_packidx(repo, *packidx, path_packidx);
1023 		free(path_packidx);
1024 		if (err)
1025 			goto done;
1026 
1027 		*idx = got_packidx_get_object_idx(*packidx, id);
1028 		if (*idx != -1) {
1029 			err = NULL; /* found the object */
1030 			goto done;
1031 		}
1032 	}
1033 
1034 	err = got_error_no_obj(id);
1035 done:
1036 	if (packdir && closedir(packdir) != 0 && err == NULL)
1037 		err = got_error_from_errno("closedir");
1038 	return err;
1039 }
1040 
1041 static const struct got_error *
1042 read_packfile_hdr(int fd, struct got_packidx *packidx)
1043 {
1044 	const struct got_error *err = NULL;
1045 	uint32_t totobj = be32toh(packidx->hdr.fanout_table[0xff]);
1046 	struct got_packfile_hdr hdr;
1047 	ssize_t n;
1048 
1049 	n = read(fd, &hdr, sizeof(hdr));
1050 	if (n < 0)
1051 		return got_error_from_errno("read");
1052 	if (n != sizeof(hdr))
1053 		return got_error(GOT_ERR_BAD_PACKFILE);
1054 
1055 	if (be32toh(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
1056 	    be32toh(hdr.version) != GOT_PACKFILE_VERSION ||
1057 	    be32toh(hdr.nobjects) != totobj)
1058 		err = got_error(GOT_ERR_BAD_PACKFILE);
1059 
1060 	return err;
1061 }
1062 
1063 static const struct got_error *
1064 open_packfile(int *fd, struct got_repository *repo,
1065     const char *relpath, struct got_packidx *packidx)
1066 {
1067 	const struct got_error *err = NULL;
1068 
1069 	*fd = openat(got_repo_get_fd(repo), relpath, O_RDONLY | O_NOFOLLOW);
1070 	if (*fd == -1)
1071 		return got_error_from_errno_fmt("openat: %s/%s",
1072 		    got_repo_get_path_git_dir(repo), relpath);
1073 
1074 	if (packidx) {
1075 		err = read_packfile_hdr(*fd, packidx);
1076 		if (err) {
1077 			close(*fd);
1078 			*fd = -1;
1079 		}
1080 	}
1081 
1082 	return err;
1083 }
1084 
1085 const struct got_error *
1086 got_repo_cache_pack(struct got_pack **packp, struct got_repository *repo,
1087     const char *path_packfile, struct got_packidx *packidx)
1088 {
1089 	const struct got_error *err = NULL;
1090 	struct got_pack *pack = NULL;
1091 	struct stat sb;
1092 	size_t i;
1093 
1094 	if (packp)
1095 		*packp = NULL;
1096 
1097 	for (i = 0; i < nitems(repo->packs); i++) {
1098 		pack = &repo->packs[i];
1099 		if (pack->path_packfile == NULL)
1100 			break;
1101 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1102 			return got_error(GOT_ERR_CACHE_DUP_ENTRY);
1103 	}
1104 
1105 	if (i == nitems(repo->packs) - 1) {
1106 		err = got_pack_close(&repo->packs[i - 1]);
1107 		if (err)
1108 			return err;
1109 		memmove(&repo->packs[1], &repo->packs[0],
1110 		    sizeof(repo->packs) - sizeof(repo->packs[0]));
1111 		i = 0;
1112 	}
1113 
1114 	pack = &repo->packs[i];
1115 
1116 	pack->path_packfile = strdup(path_packfile);
1117 	if (pack->path_packfile == NULL) {
1118 		err = got_error_from_errno("strdup");
1119 		goto done;
1120 	}
1121 
1122 	err = open_packfile(&pack->fd, repo, path_packfile, packidx);
1123 	if (err)
1124 		goto done;
1125 
1126 	if (fstat(pack->fd, &sb) != 0) {
1127 		err = got_error_from_errno("fstat");
1128 		goto done;
1129 	}
1130 	pack->filesize = sb.st_size;
1131 
1132 	pack->privsep_child = NULL;
1133 
1134 #ifndef GOT_PACK_NO_MMAP
1135 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1136 	    pack->fd, 0);
1137 	if (pack->map == MAP_FAILED) {
1138 		if (errno != ENOMEM) {
1139 			err = got_error_from_errno("mmap");
1140 			goto done;
1141 		}
1142 		pack->map = NULL; /* fall back to read(2) */
1143 	}
1144 #endif
1145 done:
1146 	if (err) {
1147 		if (pack) {
1148 			free(pack->path_packfile);
1149 			memset(pack, 0, sizeof(*pack));
1150 		}
1151 	} else if (packp)
1152 		*packp = pack;
1153 	return err;
1154 }
1155 
1156 struct got_pack *
1157 got_repo_get_cached_pack(struct got_repository *repo, const char *path_packfile)
1158 {
1159 	struct got_pack *pack = NULL;
1160 	size_t i;
1161 
1162 	for (i = 0; i < nitems(repo->packs); i++) {
1163 		pack = &repo->packs[i];
1164 		if (pack->path_packfile == NULL)
1165 			break;
1166 		if (strcmp(pack->path_packfile, path_packfile) == 0)
1167 			return pack;
1168 	}
1169 
1170 	return NULL;
1171 }
1172 
1173 const struct got_error *
1174 got_repo_init(const char *repo_path)
1175 {
1176 	const struct got_error *err = NULL;
1177 	const char *dirnames[] = {
1178 		GOT_OBJECTS_DIR,
1179 		GOT_OBJECTS_PACK_DIR,
1180 		GOT_REFS_DIR,
1181 	};
1182 	const char *description_str = "Unnamed repository; "
1183 	    "edit this file 'description' to name the repository.";
1184 	const char *headref_str = "ref: refs/heads/main";
1185 	const char *gitconfig_str = "[core]\n"
1186 	    "\trepositoryformatversion = 0\n"
1187 	    "\tfilemode = true\n"
1188 	    "\tbare = true\n";
1189 	char *path;
1190 	size_t i;
1191 
1192 	if (!got_path_dir_is_empty(repo_path))
1193 		return got_error(GOT_ERR_DIR_NOT_EMPTY);
1194 
1195 	for (i = 0; i < nitems(dirnames); i++) {
1196 		if (asprintf(&path, "%s/%s", repo_path, dirnames[i]) == -1) {
1197 			return got_error_from_errno("asprintf");
1198 		}
1199 		err = got_path_mkdir(path);
1200 		free(path);
1201 		if (err)
1202 			return err;
1203 	}
1204 
1205 	if (asprintf(&path, "%s/%s", repo_path, "description") == -1)
1206 		return got_error_from_errno("asprintf");
1207 	err = got_path_create_file(path, description_str);
1208 	free(path);
1209 	if (err)
1210 		return err;
1211 
1212 	if (asprintf(&path, "%s/%s", repo_path, GOT_HEAD_FILE) == -1)
1213 		return got_error_from_errno("asprintf");
1214 	err = got_path_create_file(path, headref_str);
1215 	free(path);
1216 	if (err)
1217 		return err;
1218 
1219 	if (asprintf(&path, "%s/%s", repo_path, "config") == -1)
1220 		return got_error_from_errno("asprintf");
1221 	err = got_path_create_file(path, gitconfig_str);
1222 	free(path);
1223 	if (err)
1224 		return err;
1225 
1226 	return NULL;
1227 }
1228 
1229 static const struct got_error *
1230 match_packed_object(struct got_object_id **unique_id,
1231     struct got_repository *repo, const char *id_str_prefix, int obj_type)
1232 {
1233 	const struct got_error *err = NULL;
1234 	DIR *packdir = NULL;
1235 	struct dirent *dent;
1236 	char *path_packidx;
1237 	struct got_object_id_queue matched_ids;
1238 	int packdir_fd;
1239 
1240 	SIMPLEQ_INIT(&matched_ids);
1241 
1242 	packdir_fd = openat(got_repo_get_fd(repo),
1243 	    GOT_OBJECTS_PACK_DIR, O_DIRECTORY);
1244 	if (packdir_fd == -1) {
1245 		if (errno != ENOENT)
1246 			err = got_error_from_errno2("openat", GOT_OBJECTS_PACK_DIR);
1247 		goto done;
1248 	}
1249 
1250 	packdir = fdopendir(packdir_fd);
1251 	if (packdir == NULL) {
1252 		err = got_error_from_errno("fdopendir");
1253 		goto done;
1254 	}
1255 
1256 	while ((dent = readdir(packdir)) != NULL) {
1257 		struct got_packidx *packidx;
1258 		struct got_object_qid *qid;
1259 
1260 		if (!is_packidx_filename(dent->d_name, dent->d_namlen))
1261 			continue;
1262 
1263 		if (asprintf(&path_packidx, "%s/%s", GOT_OBJECTS_PACK_DIR,
1264 		    dent->d_name) == -1) {
1265 			err = got_error_from_errno("strdup");
1266 			break;
1267 		}
1268 
1269 		err = got_packidx_open(&packidx, got_repo_get_fd(repo),
1270 		    path_packidx, 0);
1271 		free(path_packidx);
1272 		if (err)
1273 			break;
1274 
1275 		err = got_packidx_match_id_str_prefix(&matched_ids,
1276 		    packidx, id_str_prefix);
1277 		if (err) {
1278 			got_packidx_close(packidx);
1279 			break;
1280 		}
1281 		err = got_packidx_close(packidx);
1282 		if (err)
1283 			break;
1284 
1285 		SIMPLEQ_FOREACH(qid, &matched_ids, entry) {
1286 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1287 				int matched_type;
1288 				err = got_object_get_type(&matched_type, repo,
1289 				    qid->id);
1290 				if (err)
1291 					goto done;
1292 				if (matched_type != obj_type)
1293 					continue;
1294 			}
1295 			if (*unique_id == NULL) {
1296 				*unique_id = got_object_id_dup(qid->id);
1297 				if (*unique_id == NULL) {
1298 					err = got_error_from_errno("malloc");
1299 					goto done;
1300 				}
1301 			} else {
1302 				if (got_object_id_cmp(*unique_id, qid->id) == 0)
1303 					continue; /* packed multiple times */
1304 				err = got_error(GOT_ERR_AMBIGUOUS_ID);
1305 				goto done;
1306 			}
1307 		}
1308 	}
1309 done:
1310 	got_object_id_queue_free(&matched_ids);
1311 	if (packdir && closedir(packdir) != 0 && err == NULL)
1312 		err = got_error_from_errno("closedir");
1313 	if (err) {
1314 		free(*unique_id);
1315 		*unique_id = NULL;
1316 	}
1317 	return err;
1318 }
1319 
1320 static const struct got_error *
1321 match_loose_object(struct got_object_id **unique_id, const char *path_objects,
1322     const char *object_dir, const char *id_str_prefix, int obj_type,
1323     struct got_repository *repo)
1324 {
1325 	const struct got_error *err = NULL;
1326 	char *path;
1327 	DIR *dir = NULL;
1328 	struct dirent *dent;
1329 	struct got_object_id id;
1330 
1331 	if (asprintf(&path, "%s/%s", path_objects, object_dir) == -1) {
1332 		err = got_error_from_errno("asprintf");
1333 		goto done;
1334 	}
1335 
1336 	dir = opendir(path);
1337 	if (dir == NULL) {
1338 		if (errno == ENOENT) {
1339 			err = NULL;
1340 			goto done;
1341 		}
1342 		err = got_error_from_errno2("opendir", path);
1343 		goto done;
1344 	}
1345 	while ((dent = readdir(dir)) != NULL) {
1346 		char *id_str;
1347 		int cmp;
1348 
1349 		if (strcmp(dent->d_name, ".") == 0 ||
1350 		    strcmp(dent->d_name, "..") == 0)
1351 			continue;
1352 
1353 		if (asprintf(&id_str, "%s%s", object_dir, dent->d_name) == -1) {
1354 			err = got_error_from_errno("asprintf");
1355 			goto done;
1356 		}
1357 
1358 		if (!got_parse_sha1_digest(id.sha1, id_str))
1359 			continue;
1360 
1361 		/*
1362 		 * Directory entries do not necessarily appear in
1363 		 * sorted order, so we must iterate over all of them.
1364 		 */
1365 		cmp = strncmp(id_str, id_str_prefix, strlen(id_str_prefix));
1366 		if (cmp != 0) {
1367 			free(id_str);
1368 			continue;
1369 		}
1370 
1371 		if (*unique_id == NULL) {
1372 			if (obj_type != GOT_OBJ_TYPE_ANY) {
1373 				int matched_type;
1374 				err = got_object_get_type(&matched_type, repo,
1375 				    &id);
1376 				if (err)
1377 					goto done;
1378 				if (matched_type != obj_type)
1379 					continue;
1380 			}
1381 			*unique_id = got_object_id_dup(&id);
1382 			if (*unique_id == NULL) {
1383 				err = got_error_from_errno("got_object_id_dup");
1384 				free(id_str);
1385 				goto done;
1386 			}
1387 		} else {
1388 			if (got_object_id_cmp(*unique_id, &id) == 0)
1389 				continue; /* both packed and loose */
1390 			err = got_error(GOT_ERR_AMBIGUOUS_ID);
1391 			free(id_str);
1392 			goto done;
1393 		}
1394 	}
1395 done:
1396 	if (dir && closedir(dir) != 0 && err == NULL)
1397 		err = got_error_from_errno("closedir");
1398 	if (err) {
1399 		free(*unique_id);
1400 		*unique_id = NULL;
1401 	}
1402 	free(path);
1403 	return err;
1404 }
1405 
1406 const struct got_error *
1407 got_repo_match_object_id_prefix(struct got_object_id **id,
1408     const char *id_str_prefix, int obj_type, struct got_repository *repo)
1409 {
1410 	const struct got_error *err = NULL;
1411 	char *path_objects = got_repo_get_path_objects(repo);
1412 	char *object_dir = NULL;
1413 	size_t len;
1414 	int i;
1415 
1416 	*id = NULL;
1417 
1418 	for (i = 0; i < strlen(id_str_prefix); i++) {
1419 		if (isxdigit((unsigned char)id_str_prefix[i]))
1420 			continue;
1421 		return got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1422 	}
1423 
1424 	len = strlen(id_str_prefix);
1425 	if (len >= 2) {
1426 		err = match_packed_object(id, repo, id_str_prefix, obj_type);
1427 		if (err)
1428 			goto done;
1429 		object_dir = strndup(id_str_prefix, 2);
1430 		if (object_dir == NULL) {
1431 			err = got_error_from_errno("strdup");
1432 			goto done;
1433 		}
1434 		err = match_loose_object(id, path_objects, object_dir,
1435 		    id_str_prefix, obj_type, repo);
1436 	} else if (len == 1) {
1437 		int i;
1438 		for (i = 0; i < 0xf; i++) {
1439 			if (asprintf(&object_dir, "%s%.1x", id_str_prefix, i)
1440 			    == -1) {
1441 				err = got_error_from_errno("asprintf");
1442 				goto done;
1443 			}
1444 			err = match_packed_object(id, repo, object_dir,
1445 			    obj_type);
1446 			if (err)
1447 				goto done;
1448 			err = match_loose_object(id, path_objects, object_dir,
1449 			    id_str_prefix, obj_type, repo);
1450 			if (err)
1451 				goto done;
1452 		}
1453 	} else {
1454 		err = got_error_path(id_str_prefix, GOT_ERR_BAD_OBJ_ID_STR);
1455 		goto done;
1456 	}
1457 done:
1458 	free(object_dir);
1459 	if (err) {
1460 		free(*id);
1461 		*id = NULL;
1462 	} else if (*id == NULL)
1463 		err = got_error_path(id_str_prefix, GOT_ERR_NO_OBJ);
1464 
1465 	return err;
1466 }
1467 
1468 const struct got_error *
1469 got_repo_match_object_id(struct got_object_id **id, char **label,
1470     const char *id_str, int obj_type, struct got_reflist_head *refs,
1471     struct got_repository *repo)
1472 {
1473 	const struct got_error *err;
1474 	struct got_tag_object *tag;
1475 	struct got_reference *ref = NULL;
1476 
1477 	*id = NULL;
1478 	if (label)
1479 		*label = NULL;
1480 
1481 	if (refs) {
1482 		err = got_repo_object_match_tag(&tag, id_str, GOT_OBJ_TYPE_ANY,
1483 		    refs, repo);
1484 		if (err == NULL) {
1485 			*id = got_object_id_dup(
1486 			    got_object_tag_get_object_id(tag));
1487 			if (*id == NULL)
1488 				err = got_error_from_errno("got_object_id_dup");
1489 			else if (label && asprintf(label, "refs/tags/%s",
1490 			    got_object_tag_get_name(tag)) == -1) {
1491 				err = got_error_from_errno("asprintf");
1492 				free(*id);
1493 				*id = NULL;
1494 			}
1495 			got_object_tag_close(tag);
1496 			return err;
1497 		} else if (err->code != GOT_ERR_OBJ_TYPE &&
1498 		    err->code != GOT_ERR_NO_OBJ)
1499 			return err;
1500 	}
1501 
1502 	err = got_repo_match_object_id_prefix(id, id_str, obj_type, repo);
1503 	if (err) {
1504 		if (err->code != GOT_ERR_BAD_OBJ_ID_STR)
1505 			return err;
1506 		err = got_ref_open(&ref, repo, id_str, 0);
1507 		if (err != NULL)
1508 			goto done;
1509 		if (label) {
1510 			*label = strdup(got_ref_get_name(ref));
1511 			if (*label == NULL) {
1512 				err = got_error_from_errno("strdup");
1513 				goto done;
1514 			}
1515 		}
1516 		err = got_ref_resolve(id, repo, ref);
1517 	} else if (label) {
1518 		err = got_object_id_str(label, *id);
1519 		if (*label == NULL) {
1520 			err = got_error_from_errno("strdup");
1521 			goto done;
1522 		}
1523 	}
1524 done:
1525 	if (ref)
1526 		got_ref_close(ref);
1527 	return err;
1528 }
1529 
1530 const struct got_error *
1531 got_repo_object_match_tag(struct got_tag_object **tag, const char *name,
1532     int obj_type, struct got_reflist_head *refs, struct got_repository *repo)
1533 {
1534 	const struct got_error *err = NULL;
1535 	struct got_reflist_entry *re;
1536 	struct got_object_id *tag_id;
1537 	int name_is_absolute = (strncmp(name, "refs/", 5) == 0);
1538 
1539 	*tag = NULL;
1540 
1541 	TAILQ_FOREACH(re, refs, entry) {
1542 		const char *refname;
1543 		refname = got_ref_get_name(re->ref);
1544 		if (got_ref_is_symbolic(re->ref))
1545 			continue;
1546 		if (strncmp(refname, "refs/tags/", 10) != 0)
1547 			continue;
1548 		if (!name_is_absolute)
1549 			refname += strlen("refs/tags/");
1550 		if (strcmp(refname, name) != 0)
1551 			continue;
1552 		err = got_ref_resolve(&tag_id, repo, re->ref);
1553 		if (err)
1554 			break;
1555 		err = got_object_open_as_tag(tag, repo, tag_id);
1556 		free(tag_id);
1557 		if (err)
1558 			break;
1559 		if (obj_type == GOT_OBJ_TYPE_ANY ||
1560 		    got_object_tag_get_object_type(*tag) == obj_type)
1561 			break;
1562 		got_object_tag_close(*tag);
1563 		*tag = NULL;
1564 	}
1565 
1566 	if (err == NULL && *tag == NULL)
1567 		err = got_error_path(name, GOT_ERR_NO_OBJ);
1568 	return err;
1569 }
1570 
1571 static const struct got_error *
1572 alloc_added_blob_tree_entry(struct got_tree_entry **new_te,
1573     const char *name, mode_t mode, struct got_object_id *blob_id)
1574 {
1575 	const struct got_error *err = NULL;
1576 
1577 	 *new_te = NULL;
1578 
1579 	*new_te = calloc(1, sizeof(**new_te));
1580 	if (*new_te == NULL)
1581 		return got_error_from_errno("calloc");
1582 
1583 	if (strlcpy((*new_te)->name, name, sizeof((*new_te)->name)) >=
1584 	    sizeof((*new_te)->name)) {
1585 		err = got_error(GOT_ERR_NO_SPACE);
1586 		goto done;
1587 	}
1588 
1589 	if (S_ISLNK(mode)) {
1590 		(*new_te)->mode = S_IFLNK;
1591 	} else {
1592 		(*new_te)->mode = S_IFREG;
1593 		(*new_te)->mode |= (mode & (S_IRWXU | S_IRWXG | S_IRWXO));
1594 	}
1595 	memcpy(&(*new_te)->id, blob_id, sizeof((*new_te)->id));
1596 done:
1597 	if (err && *new_te) {
1598 		free(*new_te);
1599 		*new_te = NULL;
1600 	}
1601 	return err;
1602 }
1603 
1604 static const struct got_error *
1605 import_file(struct got_tree_entry **new_te, struct dirent *de,
1606     const char *path, struct got_repository *repo)
1607 {
1608 	const struct got_error *err;
1609 	struct got_object_id *blob_id = NULL;
1610 	char *filepath;
1611 	struct stat sb;
1612 
1613 	if (asprintf(&filepath, "%s%s%s", path,
1614 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1615 		return got_error_from_errno("asprintf");
1616 
1617 	if (lstat(filepath, &sb) != 0) {
1618 		err = got_error_from_errno2("lstat", path);
1619 		goto done;
1620 	}
1621 
1622 	err = got_object_blob_create(&blob_id, filepath, repo);
1623 	if (err)
1624 		goto done;
1625 
1626 	err = alloc_added_blob_tree_entry(new_te, de->d_name, sb.st_mode,
1627 	    blob_id);
1628 done:
1629 	free(filepath);
1630 	if (err)
1631 		free(blob_id);
1632 	return err;
1633 }
1634 
1635 static const struct got_error *
1636 insert_tree_entry(struct got_tree_entry *new_te,
1637     struct got_pathlist_head *paths)
1638 {
1639 	const struct got_error *err = NULL;
1640 	struct got_pathlist_entry *new_pe;
1641 
1642 	err = got_pathlist_insert(&new_pe, paths, new_te->name, new_te);
1643 	if (err)
1644 		return err;
1645 	if (new_pe == NULL)
1646 		return got_error(GOT_ERR_TREE_DUP_ENTRY);
1647 	return NULL;
1648 }
1649 
1650 static const struct got_error *write_tree(struct got_object_id **,
1651     const char *, struct got_pathlist_head *, struct got_repository *,
1652     got_repo_import_cb progress_cb, void *progress_arg);
1653 
1654 static const struct got_error *
1655 import_subdir(struct got_tree_entry **new_te, struct dirent *de,
1656     const char *path, struct got_pathlist_head *ignores,
1657     struct got_repository *repo,
1658     got_repo_import_cb progress_cb, void *progress_arg)
1659 {
1660 	const struct got_error *err;
1661 	struct got_object_id *id = NULL;
1662 	char *subdirpath;
1663 
1664 	if (asprintf(&subdirpath, "%s%s%s", path,
1665 	    path[0] == '\0' ? "" : "/", de->d_name) == -1)
1666 		return got_error_from_errno("asprintf");
1667 
1668 	(*new_te) = calloc(1, sizeof(**new_te));
1669 	if (*new_te == NULL)
1670 		return got_error_from_errno("calloc");
1671 	(*new_te)->mode = S_IFDIR;
1672 	if (strlcpy((*new_te)->name, de->d_name, sizeof((*new_te)->name)) >=
1673 	    sizeof((*new_te)->name)) {
1674 		err = got_error(GOT_ERR_NO_SPACE);
1675 		goto done;
1676 	}
1677 	err = write_tree(&id, subdirpath, ignores,  repo,
1678 	    progress_cb, progress_arg);
1679 	if (err)
1680 		goto done;
1681 	memcpy(&(*new_te)->id, id, sizeof((*new_te)->id));
1682 	
1683 done:
1684 	free(id);
1685 	free(subdirpath);
1686 	if (err) {
1687 		free(*new_te);
1688 		*new_te = NULL;
1689 	}
1690 	return err;
1691 }
1692 
1693 static const struct got_error *
1694 write_tree(struct got_object_id **new_tree_id, const char *path_dir,
1695     struct got_pathlist_head *ignores, struct got_repository *repo,
1696     got_repo_import_cb progress_cb, void *progress_arg)
1697 {
1698 	const struct got_error *err = NULL;
1699 	DIR *dir;
1700 	struct dirent *de;
1701 	int nentries;
1702 	struct got_tree_entry *new_te = NULL;
1703 	struct got_pathlist_head paths;
1704 	struct got_pathlist_entry *pe;
1705 
1706 	*new_tree_id = NULL;
1707 
1708 	TAILQ_INIT(&paths);
1709 
1710 	dir = opendir(path_dir);
1711 	if (dir == NULL) {
1712 		err = got_error_from_errno2("opendir", path_dir);
1713 		goto done;
1714 	}
1715 
1716 	nentries = 0;
1717 	while ((de = readdir(dir)) != NULL) {
1718 		int ignore = 0;
1719 		int type;
1720 
1721 		if (strcmp(de->d_name, ".") == 0 ||
1722 		    strcmp(de->d_name, "..") == 0)
1723 			continue;
1724 
1725 		TAILQ_FOREACH(pe, ignores, entry) {
1726 			if (fnmatch(pe->path, de->d_name, 0) == 0) {
1727 				ignore = 1;
1728 				break;
1729 			}
1730 		}
1731 		if (ignore)
1732 			continue;
1733 
1734 		err = got_path_dirent_type(&type, path_dir, de);
1735 		if (err)
1736 			goto done;
1737 
1738 		if (type == DT_DIR) {
1739 			err = import_subdir(&new_te, de, path_dir,
1740 			    ignores, repo, progress_cb, progress_arg);
1741 			if (err) {
1742 				if (err->code != GOT_ERR_NO_TREE_ENTRY)
1743 					goto done;
1744 				err = NULL;
1745 				continue;
1746 			}
1747 		} else if (type == DT_REG || type == DT_LNK) {
1748 			err = import_file(&new_te, de, path_dir, repo);
1749 			if (err)
1750 				goto done;
1751 		} else
1752 			continue;
1753 
1754 		err = insert_tree_entry(new_te, &paths);
1755 		if (err)
1756 			goto done;
1757 		nentries++;
1758 	}
1759 
1760 	if (TAILQ_EMPTY(&paths)) {
1761 		err = got_error_msg(GOT_ERR_NO_TREE_ENTRY,
1762 		    "cannot create tree without any entries");
1763 		goto done;
1764 	}
1765 
1766 	TAILQ_FOREACH(pe, &paths, entry) {
1767 		struct got_tree_entry *te = pe->data;
1768 		char *path;
1769 		if (!S_ISREG(te->mode) && !S_ISLNK(te->mode))
1770 			continue;
1771 		if (asprintf(&path, "%s/%s", path_dir, pe->path) == -1) {
1772 			err = got_error_from_errno("asprintf");
1773 			goto done;
1774 		}
1775 		err = (*progress_cb)(progress_arg, path);
1776 		free(path);
1777 		if (err)
1778 			goto done;
1779 	}
1780 
1781 	err = got_object_tree_create(new_tree_id, &paths, nentries, repo);
1782 done:
1783 	if (dir)
1784 		closedir(dir);
1785 	got_pathlist_free(&paths);
1786 	return err;
1787 }
1788 
1789 const struct got_error *
1790 got_repo_import(struct got_object_id **new_commit_id, const char *path_dir,
1791     const char *logmsg, const char *author, struct got_pathlist_head *ignores,
1792     struct got_repository *repo, got_repo_import_cb progress_cb,
1793     void *progress_arg)
1794 {
1795 	const struct got_error *err;
1796 	struct got_object_id *new_tree_id;
1797 
1798 	err = write_tree(&new_tree_id, path_dir, ignores, repo,
1799 	    progress_cb, progress_arg);
1800 	if (err)
1801 		return err;
1802 
1803 	err = got_object_commit_create(new_commit_id, new_tree_id, NULL, 0,
1804 	    author, time(NULL), author, time(NULL), logmsg, repo);
1805 	free(new_tree_id);
1806 	return err;
1807 }