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