1 /*
2  * Copyright (c) 2018, 2019 Ori Bernstein <ori@openbsd.org>
3  * Copyright (c) 2021 Stefan Sperling <stsp@openbsd.org>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #include <sys/types.h>
19 #include <sys/stat.h>
20 #include <sys/queue.h>
21 #include <sys/tree.h>
22 #include <sys/uio.h>
23 #include <sys/socket.h>
24 #include <sys/wait.h>
25 #include <sys/resource.h>
26 #include <sys/socket.h>
27 
28 #include <endian.h>
29 #include <errno.h>
30 #include <err.h>
31 #include <fcntl.h>
32 #include <stdio.h>
33 #include <stdlib.h>
34 #include <string.h>
35 #include <stdint.h>
36 #include <sha1.h>
37 #include <unistd.h>
38 #include <zlib.h>
39 #include <ctype.h>
40 #include <limits.h>
41 #include <imsg.h>
42 #include <time.h>
43 #include <uuid.h>
44 
45 #include "got_error.h"
46 #include "got_reference.h"
47 #include "got_repository.h"
48 #include "got_path.h"
49 #include "got_cancel.h"
50 #include "got_worktree.h"
51 #include "got_object.h"
52 #include "got_opentemp.h"
53 #include "got_send.h"
54 #include "got_repository_admin.h"
55 #include "got_commit_graph.h"
56 
57 #include "got_lib_delta.h"
58 #include "got_lib_inflate.h"
59 #include "got_lib_object.h"
60 #include "got_lib_object_parse.h"
61 #include "got_lib_object_create.h"
62 #include "got_lib_pack.h"
63 #include "got_lib_sha1.h"
64 #include "got_lib_privsep.h"
65 #include "got_lib_object_cache.h"
66 #include "got_lib_repository.h"
67 #include "got_lib_ratelimit.h"
68 #include "got_lib_pack_create.h"
69 #include "got_lib_dial.h"
70 
71 #ifndef nitems
72 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
73 #endif
74 
75 #ifndef ssizeof
76 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
77 #endif
78 
79 #ifndef MIN
80 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
81 #endif
82 
83 const struct got_error *
84 got_send_connect(pid_t *sendpid, int *sendfd, const char *proto,
85     const char *host, const char *port, const char *server_path, int verbosity)
86 {
87 	const struct got_error *err = NULL;
88 
89 	*sendpid = -1;
90 	*sendfd = -1;
91 
92 	if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
93 		err = got_dial_ssh(sendpid, sendfd, host, port, server_path,
94 		    GOT_DIAL_DIRECTION_SEND, verbosity);
95 	else if (strcmp(proto, "git") == 0)
96 		err = got_dial_git(sendfd, host, port, server_path,
97 		    GOT_DIAL_DIRECTION_SEND);
98 	else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
99 		err = got_error_path(proto, GOT_ERR_NOT_IMPL);
100 	else
101 		err = got_error_path(proto, GOT_ERR_BAD_PROTO);
102 	return err;
103 }
104 
105 struct pack_progress_arg {
106     got_send_progress_cb progress_cb;
107     void *progress_arg;
108 
109     int ncolored;
110     int nfound;
111     int ntrees;
112     off_t packfile_size;
113     int ncommits;
114     int nobj_total;
115     int nobj_deltify;
116     int nobj_written;
117 };
118 
119 static const struct got_error *
120 pack_progress(void *arg, int ncolored, int nfound, int ntrees,
121     off_t packfile_size, int ncommits, int nobj_total, int nobj_deltify,
122     int nobj_written)
123 {
124 	const struct got_error *err;
125 	struct pack_progress_arg *a = arg;
126 
127 	err = a->progress_cb(a->progress_arg, ncolored, nfound, ntrees,
128 	    packfile_size, ncommits, nobj_total, nobj_deltify,
129 	    nobj_written, 0, NULL, NULL, 0);
130 	if (err)
131 		return err;
132 
133 	a->ncolored= ncolored;
134 	a->nfound = nfound;
135 	a->ntrees = ntrees;
136 	a->packfile_size = packfile_size;
137 	a->ncommits = ncommits;
138 	a->nobj_total = nobj_total;
139 	a->nobj_deltify = nobj_deltify;
140 	a->nobj_written = nobj_written;
141 	return NULL;
142 }
143 
144 static const struct got_error *
145 insert_ref(struct got_reflist_head *refs, const char *refname,
146     struct got_repository *repo)
147 {
148 	const struct got_error *err;
149 	struct got_reference *ref;
150 	struct got_reflist_entry *new;
151 
152 	err = got_ref_open(&ref, repo, refname, 0);
153 	if (err)
154 		return err;
155 
156 	err = got_reflist_insert(&new, refs, ref, got_ref_cmp_by_name, NULL);
157 	if (err || new == NULL /* duplicate */)
158 		got_ref_close(ref);
159 
160 	return err;
161 }
162 
163 static const struct got_error *
164 check_linear_ancestry(const char *refname, struct got_object_id *my_id,
165     struct got_object_id *their_id, struct got_repository *repo,
166     got_cancel_cb cancel_cb, void *cancel_arg)
167 {
168 	const struct got_error *err = NULL;
169 	struct got_object_id *yca_id;
170 	int obj_type;
171 
172 	err = got_object_get_type(&obj_type, repo, their_id);
173 	if (err)
174 		return err;
175 	if (obj_type != GOT_OBJ_TYPE_COMMIT)
176 		return got_error_fmt(GOT_ERR_OBJ_TYPE,
177 		    "bad object type on server for %s", refname);
178 
179 	err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
180 	    my_id, their_id, 1, repo, cancel_cb, cancel_arg);
181 	if (err)
182 		return err;
183 	if (yca_id == NULL)
184 		return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
185 
186 	/*
187 	 * Require a straight line of history between the two commits,
188 	 * with their commit being older than my commit.
189 	 *
190 	 * Non-linear situations such as this require a rebase:
191 	 *
192 	 * (theirs) D       F (mine)
193 	 *           \     /
194 	 *            C   E
195 	 *             \ /
196 	 *              B (yca)
197 	 *              |
198 	 *              A
199 	 */
200 	if (got_object_id_cmp(their_id, yca_id) != 0)
201 		err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
202 
203 	free(yca_id);
204 	return err;
205 }
206 
207 static const struct got_error *
208 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
209 {
210 	struct got_object_id **new;
211 	const size_t alloc_chunksz = 256;
212 
213 	if (*nalloc >= n)
214 		return NULL;
215 
216 	new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
217 	    sizeof(struct got_object_id));
218 	if (new == NULL)
219 		return got_error_from_errno("recallocarray");
220 
221 	*ids = new;
222 	*nalloc += alloc_chunksz;
223 	return NULL;
224 }
225 
226 static struct got_reference *
227 find_ref(struct got_reflist_head *refs, const char *refname)
228 {
229 	struct got_reflist_entry *re;
230 
231 	TAILQ_FOREACH(re, refs, entry) {
232 		if (got_path_cmp(got_ref_get_name(re->ref), refname,
233 		    strlen(got_ref_get_name(re->ref)),
234 		    strlen(refname)) == 0) {
235 			return re->ref;
236 		}
237 	}
238 
239 	return NULL;
240 }
241 
242 static struct got_pathlist_entry *
243 find_their_ref(struct got_pathlist_head *their_refs, const char *refname)
244 {
245 	struct got_pathlist_entry *pe;
246 
247 	TAILQ_FOREACH(pe, their_refs, entry) {
248 		const char *their_refname = pe->path;
249 		if (got_path_cmp(their_refname, refname,
250 		    strlen(their_refname), strlen(refname)) == 0) {
251 			return pe;
252 		}
253 	}
254 
255 	return NULL;
256 }
257 
258 static const struct got_error *
259 get_remote_refname(char **remote_refname, const char *remote_name,
260     const char *refname)
261 {
262 	if (strncmp(refname, "refs/", 5) == 0)
263 		refname += 5;
264 	if (strncmp(refname, "heads/", 6) == 0)
265 		refname += 6;
266 
267 	if (asprintf(remote_refname, "refs/remotes/%s/%s",
268 	    remote_name, refname) == -1)
269 		return got_error_from_errno("asprintf");
270 
271 	return NULL;
272 }
273 
274 static const struct got_error *
275 update_remote_ref(struct got_reference *my_ref, const char *remote_name,
276     struct got_repository *repo)
277 {
278 	const struct got_error *err, *unlock_err;
279 	struct got_object_id *my_id;
280 	struct got_reference *ref = NULL;
281 	char *remote_refname = NULL;
282 	int ref_locked = 0;
283 
284 	err = got_ref_resolve(&my_id, repo, my_ref);
285 	if (err)
286 		return err;
287 
288 	err = get_remote_refname(&remote_refname, remote_name,
289 	    got_ref_get_name(my_ref));
290 	if (err)
291 		goto done;
292 
293 	err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
294 	if (err) {
295 		if (err->code != GOT_ERR_NOT_REF)
296 			goto done;
297 		err = got_ref_alloc(&ref, remote_refname, my_id);
298 		if (err)
299 			goto done;
300 	} else {
301 		ref_locked = 1;
302 		err = got_ref_change_ref(ref, my_id);
303 		if (err)
304 			goto done;
305 	}
306 
307 	err = got_ref_write(ref, repo);
308 done:
309 	if (ref) {
310 		if (ref_locked) {
311 			unlock_err = got_ref_unlock(ref);
312 			if (unlock_err && err == NULL)
313 				err = unlock_err;
314 		}
315 		got_ref_close(ref);
316 	}
317 	free(my_id);
318 	free(remote_refname);
319 	return err;
320 }
321 
322 const struct got_error*
323 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
324     struct got_pathlist_head *tag_names,
325     struct got_pathlist_head *delete_branches,
326     int verbosity, int overwrite_refs, int sendfd,
327     struct got_repository *repo, got_send_progress_cb progress_cb,
328     void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
329 {
330 	int imsg_sendfds[2];
331 	int npackfd = -1, nsendfd = -1;
332 	int sendstatus, done = 0;
333 	const struct got_error *err;
334 	struct imsgbuf sendibuf;
335 	pid_t sendpid = -1;
336 	struct got_reflist_head refs;
337 	struct got_pathlist_head have_refs;
338 	struct got_pathlist_head their_refs;
339 	struct got_pathlist_entry *pe;
340 	struct got_reflist_entry *re;
341 	struct got_object_id **our_ids = NULL;
342 	struct got_object_id **their_ids = NULL;
343 	int i, nours = 0, ntheirs = 0;
344 	size_t nalloc_ours = 0, nalloc_theirs = 0;
345 	int refs_to_send = 0, refs_to_delete = 0;
346 	off_t bytes_sent = 0, bytes_sent_cur = 0;
347 	struct pack_progress_arg ppa;
348 	uint8_t packsha1[SHA1_DIGEST_LENGTH];
349 	int packfd = -1;
350 	FILE *delta_cache = NULL;
351 
352 	TAILQ_INIT(&refs);
353 	TAILQ_INIT(&have_refs);
354 	TAILQ_INIT(&their_refs);
355 
356 	TAILQ_FOREACH(pe, branch_names, entry) {
357 		const char *branchname = pe->path;
358 		if (strncmp(branchname, "refs/heads/", 11) != 0) {
359 			char *s;
360 			if (asprintf(&s, "refs/heads/%s", branchname) == -1) {
361 				err = got_error_from_errno("asprintf");
362 				goto done;
363 			}
364 			err = insert_ref(&refs, s, repo);
365 			free(s);
366 		} else {
367 			err = insert_ref(&refs, branchname, repo);
368 		}
369 		if (err)
370 			goto done;
371 	}
372 
373 	TAILQ_FOREACH(pe, delete_branches, entry) {
374 		const char *branchname = pe->path;
375 		struct got_reference *ref;
376 		if (strncmp(branchname, "refs/heads/", 11) != 0) {
377 			err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
378 			    branchname);
379 			goto done;
380 		}
381 		ref = find_ref(&refs, branchname);
382 		if (ref) {
383 			err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
384 			    "changes on %s will be sent to server",
385 			    branchname);
386 			goto done;
387 		}
388 	}
389 
390 	TAILQ_FOREACH(pe, tag_names, entry) {
391 		const char *tagname = pe->path;
392 		if (strncmp(tagname, "refs/tags/", 10) != 0) {
393 			char *s;
394 			if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
395 				err = got_error_from_errno("asprintf");
396 				goto done;
397 			}
398 			err = insert_ref(&refs, s, repo);
399 			free(s);
400 		} else {
401 			err = insert_ref(&refs, tagname, repo);
402 		}
403 		if (err)
404 			goto done;
405 	}
406 
407 	if (TAILQ_EMPTY(&refs) && TAILQ_EMPTY(delete_branches)) {
408 		err = got_error(GOT_ERR_SEND_EMPTY);
409 		goto done;
410 	}
411 
412 	TAILQ_FOREACH(re, &refs, entry) {
413 		struct got_object_id *id;
414 		int obj_type;
415 
416 		if (got_ref_is_symbolic(re->ref)) {
417 			err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
418 			    "cannot send symbolic reference %s",
419 			    got_ref_get_name(re->ref));
420 			goto done;
421 		}
422 
423 		err = got_ref_resolve(&id, repo, re->ref);
424 		if (err)
425 			goto done;
426 		err = got_object_get_type(&obj_type, repo, id);
427 		free(id);
428 		if (err)
429 			goto done;
430 		switch (obj_type) {
431 		case GOT_OBJ_TYPE_COMMIT:
432 		case GOT_OBJ_TYPE_TAG:
433 			break;
434 		default:
435 			err = got_error_fmt(GOT_ERR_OBJ_TYPE,
436 			    "cannot send %s", got_ref_get_name(re->ref));
437 			goto done;
438 		}
439 	}
440 
441 	packfd = got_opentempfd();
442 	if (packfd == -1) {
443 		err = got_error_from_errno("got_opentempfd");
444 		goto done;
445 	}
446 
447 	delta_cache = got_opentemp();
448 	if (delta_cache == NULL) {
449 		err = got_error_from_errno("got_opentemp");
450 		goto done;
451 	}
452 
453 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
454 		err = got_error_from_errno("socketpair");
455 		goto done;
456 	}
457 
458 	sendpid = fork();
459 	if (sendpid == -1) {
460 		err = got_error_from_errno("fork");
461 		goto done;
462 	} else if (sendpid == 0){
463 		got_privsep_exec_child(imsg_sendfds,
464 		    GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
465 	}
466 
467 	if (close(imsg_sendfds[1]) == -1) {
468 		err = got_error_from_errno("close");
469 		goto done;
470 	}
471 	imsg_init(&sendibuf, imsg_sendfds[0]);
472 	nsendfd = dup(sendfd);
473 	if (nsendfd == -1) {
474 		err = got_error_from_errno("dup");
475 		goto done;
476 	}
477 
478 	/*
479 	 * Convert reflist to pathlist since the privsep layer
480 	 * is linked into helper programs which lack reference.c.
481 	 */
482 	TAILQ_FOREACH(re, &refs, entry) {
483 		struct got_object_id *id;
484 		err = got_ref_resolve(&id, repo, re->ref);
485 		if (err)
486 			goto done;
487 		err = got_pathlist_append(&have_refs,
488 		    got_ref_get_name(re->ref), id);
489 		if (err)
490 			goto done;
491 		/*
492 		 * Also prepare the array of our object IDs which
493 		 * will be needed for generating a pack file.
494 		 */
495 		err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
496 		if (err)
497 			goto done;
498 		our_ids[nours] = id;
499 		nours++;
500 	}
501 
502 	err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
503 	    delete_branches, verbosity);
504 	if (err)
505 		goto done;
506 	nsendfd = -1;
507 
508 	err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
509 	if (err)
510 		goto done;
511 
512 	/*
513 	 * Process references reported by the server.
514 	 * Push appropriate object IDs onto the "their IDs" array.
515 	 * This array will be used to exclude objects which already
516 	 * exist on the server from our pack file.
517 	 */
518 	TAILQ_FOREACH(pe, &their_refs, entry) {
519 		const char *refname = pe->path;
520 		struct got_object_id *their_id = pe->data;
521 		int have_their_id;
522 		struct got_object *obj;
523 		struct got_reference *my_ref = NULL;
524 		int is_tag = 0;
525 
526 		/* Don't blindly trust the server to send us valid names. */
527 		if (!got_ref_name_is_valid(refname))
528 			continue;
529 
530 		if (strncmp(refname, "refs/tags/", 10) == 0)
531 			is_tag = 1;
532 		/*
533 		 * Find out whether this is a reference we want to upload.
534 		 * Otherwise we can still use this reference as a hint to
535 		 * avoid uploading any objects the server already has.
536 		 */
537 		my_ref = find_ref(&refs, refname);
538 		if (my_ref) {
539 			struct got_object_id *my_id;
540 			err = got_ref_resolve(&my_id, repo, my_ref);
541 			if (err)
542 				goto done;
543 			if (got_object_id_cmp(my_id, their_id) != 0) {
544 				if (!overwrite_refs && is_tag) {
545 					err = got_error_fmt(
546 					    GOT_ERR_SEND_TAG_EXISTS,
547 					    "%s", refname);
548 					free(my_id);
549 					goto done;
550 				}
551 				refs_to_send++;
552 			}
553 			free(my_id);
554 		}
555 
556 		/* Check if their object exists locally. */
557 		err = got_object_open(&obj, repo, their_id);
558 		if (err) {
559 			if (err->code != GOT_ERR_NO_OBJ)
560 				goto done;
561 			if (!overwrite_refs && my_ref != NULL) {
562 				err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
563 				    "%s", refname);
564 				goto done;
565 			}
566 			have_their_id = 0;
567 		} else {
568 			got_object_close(obj);
569 			have_their_id = 1;
570 		}
571 
572 		err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
573 		if (err)
574 			goto done;
575 
576 		if (have_their_id) {
577 			/* Enforce linear ancestry if required. */
578 			if (!overwrite_refs && my_ref && !is_tag) {
579 				struct got_object_id *my_id;
580 				err = got_ref_resolve(&my_id, repo, my_ref);
581 				if (err)
582 					goto done;
583 				err = check_linear_ancestry(refname, my_id,
584 				    their_id, repo, cancel_cb, cancel_arg);
585 				free(my_id);
586 				my_id = NULL;
587 				if (err)
588 					goto done;
589 			}
590 			/* Exclude any objects reachable via their ID. */
591 			their_ids[ntheirs] = got_object_id_dup(their_id);
592 			if (their_ids[ntheirs] == NULL) {
593 				err = got_error_from_errno("got_object_id_dup");
594 				goto done;
595 			}
596 			ntheirs++;
597 		} else if (!is_tag) {
598 			char *remote_refname;
599 			struct got_reference *ref;
600 			/*
601 			 * Exclude any objects which exist on the server
602 			 * according to a locally cached remote reference.
603 			 */
604 			err = get_remote_refname(&remote_refname,
605 			    remote_name, refname);
606 			if (err)
607 				goto done;
608 			err = got_ref_open(&ref, repo, remote_refname, 0);
609 			free(remote_refname);
610 			if (err) {
611 				if (err->code != GOT_ERR_NOT_REF)
612 					goto done;
613 			} else {
614 				err = got_ref_resolve(&their_ids[ntheirs],
615 				    repo, ref);
616 				got_ref_close(ref);
617 				if (err)
618 					goto done;
619 				ntheirs++;
620 			}
621 		}
622 	}
623 
624 	/* Account for any new references we are going to upload. */
625 	TAILQ_FOREACH(re, &refs, entry) {
626 		if (find_their_ref(&their_refs,
627 		    got_ref_get_name(re->ref)) == NULL)
628 			refs_to_send++;
629 	}
630 
631 	/* Account for any existing references we are going to delete. */
632 	TAILQ_FOREACH(pe, delete_branches, entry) {
633 		const char *branchname = pe->path;
634 		if (find_their_ref(&their_refs, branchname))
635 			refs_to_delete++;
636 	}
637 
638 	if (refs_to_send == 0 && refs_to_delete == 0) {
639 		got_privsep_send_stop(imsg_sendfds[0]);
640 		goto done;
641 	}
642 
643 	if (refs_to_send > 0) {
644 		struct got_ratelimit rl;
645 		got_ratelimit_init(&rl, 0, 500);
646 		memset(&ppa, 0, sizeof(ppa));
647 		ppa.progress_cb = progress_cb;
648 		ppa.progress_arg = progress_arg;
649 		err = got_pack_create(packsha1, packfd, delta_cache,
650 		    their_ids, ntheirs, our_ids, nours, repo, 0, 1,
651 		    pack_progress, &ppa, &rl, cancel_cb, cancel_arg);
652 		if (err)
653 			goto done;
654 
655 		npackfd = dup(packfd);
656 		if (npackfd == -1) {
657 			err = got_error_from_errno("dup");
658 			goto done;
659 		}
660 		err = got_privsep_send_packfd(&sendibuf, npackfd);
661 		if (err != NULL)
662 			goto done;
663 		npackfd = -1;
664 	} else {
665 		err = got_privsep_send_packfd(&sendibuf, -1);
666 		if (err != NULL)
667 			goto done;
668 	}
669 
670 	while (!done) {
671 		int success = 0;
672 		char *refname = NULL;
673 		char *errmsg = NULL;
674 
675 		if (cancel_cb) {
676 			err = (*cancel_cb)(cancel_arg);
677 			if (err)
678 				goto done;
679 		}
680 		err = got_privsep_recv_send_progress(&done, &bytes_sent,
681 		    &success, &refname, &errmsg, &sendibuf);
682 		if (err)
683 			goto done;
684 		if (refname && got_ref_name_is_valid(refname) && success &&
685 		    strncmp(refname, "refs/tags/", 10) != 0) {
686 			struct got_reference *my_ref;
687 			/*
688 			 * The server has accepted our changes.
689 			 * Update our reference in refs/remotes/ accordingly.
690 			 */
691 			my_ref = find_ref(&refs, refname);
692 			if (my_ref) {
693 				err = update_remote_ref(my_ref, remote_name,
694 				    repo);
695 				if (err)
696 					goto done;
697 			}
698 		}
699 		if (refname != NULL ||
700 		    bytes_sent_cur != bytes_sent) {
701 			err = progress_cb(progress_arg, ppa.ncolored,
702 			    ppa.nfound, ppa.ntrees, ppa.packfile_size,
703 			    ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
704 			    ppa.nobj_written, bytes_sent,
705 			    refname, errmsg, success);
706 			if (err) {
707 				free(refname);
708 				free(errmsg);
709 				goto done;
710 			}
711 			bytes_sent_cur = bytes_sent;
712 		}
713 		free(refname);
714 		free(errmsg);
715 	}
716 done:
717 	if (sendpid != -1) {
718 		if (err)
719 			got_privsep_send_stop(imsg_sendfds[0]);
720 		if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
721 			err = got_error_from_errno("waitpid");
722 	}
723 	if (packfd != -1 && close(packfd) == -1 && err == NULL)
724 		err = got_error_from_errno("close");
725 	if (delta_cache && fclose(delta_cache) == EOF && err == NULL)
726 		err = got_error_from_errno("fclose");
727 	if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
728 		err = got_error_from_errno("close");
729 	if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
730 		err = got_error_from_errno("close");
731 
732 	got_ref_list_free(&refs);
733 	got_pathlist_free(&have_refs);
734 	got_pathlist_free(&their_refs);
735 	for (i = 0; i < nours; i++)
736 		free(our_ids[i]);
737 	free(our_ids);
738 	for (i = 0; i < ntheirs; i++)
739 		free(their_ids[i]);
740 	free(their_ids);
741 	return err;
742 }