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 <sha2.h>
38 #include <unistd.h>
39 #include <zlib.h>
40 #include <ctype.h>
41 #include <limits.h>
42 #include <imsg.h>
43 #include <time.h>
44 #include <uuid.h>
45 
46 #include "got_error.h"
47 #include "got_reference.h"
48 #include "got_repository.h"
49 #include "got_path.h"
50 #include "got_cancel.h"
51 #include "got_worktree.h"
52 #include "got_object.h"
53 #include "got_opentemp.h"
54 #include "got_send.h"
55 #include "got_repository_admin.h"
56 #include "got_commit_graph.h"
57 
58 #include "got_lib_delta.h"
59 #include "got_lib_inflate.h"
60 #include "got_lib_object.h"
61 #include "got_lib_object_parse.h"
62 #include "got_lib_object_create.h"
63 #include "got_lib_pack.h"
64 #include "got_lib_hash.h"
65 #include "got_lib_privsep.h"
66 #include "got_lib_object_cache.h"
67 #include "got_lib_repository.h"
68 #include "got_lib_ratelimit.h"
69 #include "got_lib_pack_create.h"
70 #include "got_lib_dial.h"
71 
72 #ifndef nitems
73 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
74 #endif
75 
76 #ifndef ssizeof
77 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
78 #endif
79 
80 #ifndef MIN
81 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
82 #endif
83 
84 const struct got_error *
85 got_send_connect(pid_t *sendpid, int *sendfd, const char *proto,
86     const char *host, const char *port, const char *server_path, int verbosity)
87 {
88 	const struct got_error *err = NULL;
89 
90 	*sendpid = -1;
91 	*sendfd = -1;
92 
93 	if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
94 		err = got_dial_ssh(sendpid, sendfd, host, port, server_path,
95 		    GOT_DIAL_DIRECTION_SEND, verbosity);
96 	else if (strcmp(proto, "git") == 0)
97 		err = got_dial_git(sendfd, host, port, server_path,
98 		    GOT_DIAL_DIRECTION_SEND);
99 	else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
100 		err = got_error_path(proto, GOT_ERR_NOT_IMPL);
101 	else
102 		err = got_error_path(proto, GOT_ERR_BAD_PROTO);
103 	return err;
104 }
105 
106 struct pack_progress_arg {
107     got_send_progress_cb progress_cb;
108     void *progress_arg;
109 
110     int ncolored;
111     int nfound;
112     int ntrees;
113     off_t packfile_size;
114     int ncommits;
115     int nobj_total;
116     int nobj_deltify;
117     int nobj_written;
118 };
119 
120 static const struct got_error *
121 pack_progress(void *arg, int ncolored, int nfound, int ntrees,
122     off_t packfile_size, int ncommits, int nobj_total, int nobj_deltify,
123     int nobj_written)
124 {
125 	const struct got_error *err;
126 	struct pack_progress_arg *a = arg;
127 
128 	err = a->progress_cb(a->progress_arg, ncolored, nfound, ntrees,
129 	    packfile_size, ncommits, nobj_total, nobj_deltify,
130 	    nobj_written, 0, NULL, NULL, 0);
131 	if (err)
132 		return err;
133 
134 	a->ncolored= ncolored;
135 	a->nfound = nfound;
136 	a->ntrees = ntrees;
137 	a->packfile_size = packfile_size;
138 	a->ncommits = ncommits;
139 	a->nobj_total = nobj_total;
140 	a->nobj_deltify = nobj_deltify;
141 	a->nobj_written = nobj_written;
142 	return NULL;
143 }
144 
145 static const struct got_error *
146 insert_ref(struct got_reflist_head *refs, const char *refname,
147     struct got_repository *repo)
148 {
149 	const struct got_error *err;
150 	struct got_reference *ref;
151 	struct got_reflist_entry *new;
152 
153 	err = got_ref_open(&ref, repo, refname, 0);
154 	if (err)
155 		return err;
156 
157 	err = got_reflist_insert(&new, refs, ref, got_ref_cmp_by_name, NULL);
158 	if (err || new == NULL /* duplicate */)
159 		got_ref_close(ref);
160 
161 	return err;
162 }
163 
164 static const struct got_error *
165 check_linear_ancestry(const char *refname, struct got_object_id *my_id,
166     struct got_object_id *their_id, struct got_repository *repo,
167     got_cancel_cb cancel_cb, void *cancel_arg)
168 {
169 	const struct got_error *err = NULL;
170 	struct got_object_id *yca_id;
171 	int obj_type;
172 
173 	err = got_object_get_type(&obj_type, repo, their_id);
174 	if (err)
175 		return err;
176 	if (obj_type != GOT_OBJ_TYPE_COMMIT)
177 		return got_error_fmt(GOT_ERR_OBJ_TYPE,
178 		    "bad object type on server for %s", refname);
179 
180 	err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
181 	    my_id, their_id, 1, repo, cancel_cb, cancel_arg);
182 	if (err)
183 		return err;
184 	if (yca_id == NULL)
185 		return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
186 
187 	/*
188 	 * Require a straight line of history between the two commits,
189 	 * with their commit being older than my commit.
190 	 *
191 	 * Non-linear situations such as this require a rebase:
192 	 *
193 	 * (theirs) D       F (mine)
194 	 *           \     /
195 	 *            C   E
196 	 *             \ /
197 	 *              B (yca)
198 	 *              |
199 	 *              A
200 	 */
201 	if (got_object_id_cmp(their_id, yca_id) != 0)
202 		err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
203 
204 	free(yca_id);
205 	return err;
206 }
207 
208 static const struct got_error *
209 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
210 {
211 	struct got_object_id **new;
212 	const size_t alloc_chunksz = 256;
213 
214 	if (*nalloc >= n)
215 		return NULL;
216 
217 	new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
218 	    sizeof(struct got_object_id));
219 	if (new == NULL)
220 		return got_error_from_errno("recallocarray");
221 
222 	*ids = new;
223 	*nalloc += alloc_chunksz;
224 	return NULL;
225 }
226 
227 static struct got_reference *
228 find_ref(struct got_reflist_head *refs, const char *refname)
229 {
230 	struct got_reflist_entry *re;
231 
232 	TAILQ_FOREACH(re, refs, entry) {
233 		if (got_path_cmp(got_ref_get_name(re->ref), refname,
234 		    strlen(got_ref_get_name(re->ref)),
235 		    strlen(refname)) == 0) {
236 			return re->ref;
237 		}
238 	}
239 
240 	return NULL;
241 }
242 
243 static struct got_pathlist_entry *
244 find_their_ref(struct got_pathlist_head *their_refs, const char *refname)
245 {
246 	struct got_pathlist_entry *pe;
247 
248 	TAILQ_FOREACH(pe, their_refs, entry) {
249 		const char *their_refname = pe->path;
250 		if (got_path_cmp(their_refname, refname,
251 		    strlen(their_refname), strlen(refname)) == 0) {
252 			return pe;
253 		}
254 	}
255 
256 	return NULL;
257 }
258 
259 static const struct got_error *
260 get_remote_refname(char **remote_refname, const char *remote_name,
261     const char *refname)
262 {
263 	if (strncmp(refname, "refs/", 5) == 0)
264 		refname += 5;
265 	if (strncmp(refname, "heads/", 6) == 0)
266 		refname += 6;
267 
268 	if (asprintf(remote_refname, "refs/remotes/%s/%s",
269 	    remote_name, refname) == -1)
270 		return got_error_from_errno("asprintf");
271 
272 	return NULL;
273 }
274 
275 static const struct got_error *
276 update_remote_ref(struct got_reference *my_ref, const char *remote_name,
277     struct got_repository *repo)
278 {
279 	const struct got_error *err, *unlock_err;
280 	struct got_object_id *my_id;
281 	struct got_reference *ref = NULL;
282 	char *remote_refname = NULL;
283 	int ref_locked = 0;
284 
285 	err = got_ref_resolve(&my_id, repo, my_ref);
286 	if (err)
287 		return err;
288 
289 	err = get_remote_refname(&remote_refname, remote_name,
290 	    got_ref_get_name(my_ref));
291 	if (err)
292 		goto done;
293 
294 	err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
295 	if (err) {
296 		if (err->code != GOT_ERR_NOT_REF)
297 			goto done;
298 		err = got_ref_alloc(&ref, remote_refname, my_id);
299 		if (err)
300 			goto done;
301 	} else {
302 		ref_locked = 1;
303 		err = got_ref_change_ref(ref, my_id);
304 		if (err)
305 			goto done;
306 	}
307 
308 	err = got_ref_write(ref, repo);
309 done:
310 	if (ref) {
311 		if (ref_locked) {
312 			unlock_err = got_ref_unlock(ref);
313 			if (unlock_err && err == NULL)
314 				err = unlock_err;
315 		}
316 		got_ref_close(ref);
317 	}
318 	free(my_id);
319 	free(remote_refname);
320 	return err;
321 }
322 
323 const struct got_error*
324 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
325     struct got_pathlist_head *tag_names,
326     struct got_pathlist_head *delete_branches,
327     int verbosity, int overwrite_refs, int sendfd,
328     struct got_repository *repo, got_send_progress_cb progress_cb,
329     void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
330 {
331 	int imsg_sendfds[2];
332 	int npackfd = -1, nsendfd = -1;
333 	int sendstatus, done = 0;
334 	const struct got_error *err;
335 	struct imsgbuf sendibuf;
336 	pid_t sendpid = -1;
337 	struct got_reflist_head refs;
338 	struct got_pathlist_head have_refs;
339 	struct got_pathlist_head their_refs;
340 	struct got_pathlist_entry *pe;
341 	struct got_reflist_entry *re;
342 	struct got_object_id **our_ids = NULL;
343 	struct got_object_id **their_ids = NULL;
344 	int i, nours = 0, ntheirs = 0;
345 	size_t nalloc_ours = 0, nalloc_theirs = 0;
346 	int refs_to_send = 0, refs_to_delete = 0;
347 	off_t bytes_sent = 0, bytes_sent_cur = 0;
348 	struct pack_progress_arg ppa;
349 	uint8_t packsha1[SHA1_DIGEST_LENGTH];
350 	int packfd = -1;
351 	FILE *delta_cache = NULL;
352 
353 	TAILQ_INIT(&refs);
354 	TAILQ_INIT(&have_refs);
355 	TAILQ_INIT(&their_refs);
356 
357 	TAILQ_FOREACH(pe, branch_names, entry) {
358 		const char *branchname = pe->path;
359 		if (strncmp(branchname, "refs/heads/", 11) != 0) {
360 			char *s;
361 			if (asprintf(&s, "refs/heads/%s", branchname) == -1) {
362 				err = got_error_from_errno("asprintf");
363 				goto done;
364 			}
365 			err = insert_ref(&refs, s, repo);
366 			free(s);
367 		} else {
368 			err = insert_ref(&refs, branchname, repo);
369 		}
370 		if (err)
371 			goto done;
372 	}
373 
374 	TAILQ_FOREACH(pe, delete_branches, entry) {
375 		const char *branchname = pe->path;
376 		struct got_reference *ref;
377 		if (strncmp(branchname, "refs/heads/", 11) != 0) {
378 			err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
379 			    branchname);
380 			goto done;
381 		}
382 		ref = find_ref(&refs, branchname);
383 		if (ref) {
384 			err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
385 			    "changes on %s will be sent to server",
386 			    branchname);
387 			goto done;
388 		}
389 	}
390 
391 	TAILQ_FOREACH(pe, tag_names, entry) {
392 		const char *tagname = pe->path;
393 		if (strncmp(tagname, "refs/tags/", 10) != 0) {
394 			char *s;
395 			if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
396 				err = got_error_from_errno("asprintf");
397 				goto done;
398 			}
399 			err = insert_ref(&refs, s, repo);
400 			free(s);
401 		} else {
402 			err = insert_ref(&refs, tagname, repo);
403 		}
404 		if (err)
405 			goto done;
406 	}
407 
408 	if (TAILQ_EMPTY(&refs) && TAILQ_EMPTY(delete_branches)) {
409 		err = got_error(GOT_ERR_SEND_EMPTY);
410 		goto done;
411 	}
412 
413 	TAILQ_FOREACH(re, &refs, entry) {
414 		struct got_object_id *id;
415 		int obj_type;
416 
417 		if (got_ref_is_symbolic(re->ref)) {
418 			err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
419 			    "cannot send symbolic reference %s",
420 			    got_ref_get_name(re->ref));
421 			goto done;
422 		}
423 
424 		err = got_ref_resolve(&id, repo, re->ref);
425 		if (err)
426 			goto done;
427 		err = got_object_get_type(&obj_type, repo, id);
428 		free(id);
429 		if (err)
430 			goto done;
431 		switch (obj_type) {
432 		case GOT_OBJ_TYPE_COMMIT:
433 		case GOT_OBJ_TYPE_TAG:
434 			break;
435 		default:
436 			err = got_error_fmt(GOT_ERR_OBJ_TYPE,
437 			    "cannot send %s", got_ref_get_name(re->ref));
438 			goto done;
439 		}
440 	}
441 
442 	packfd = got_opentempfd();
443 	if (packfd == -1) {
444 		err = got_error_from_errno("got_opentempfd");
445 		goto done;
446 	}
447 
448 	delta_cache = got_opentemp();
449 	if (delta_cache == NULL) {
450 		err = got_error_from_errno("got_opentemp");
451 		goto done;
452 	}
453 
454 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
455 		err = got_error_from_errno("socketpair");
456 		goto done;
457 	}
458 
459 	sendpid = fork();
460 	if (sendpid == -1) {
461 		err = got_error_from_errno("fork");
462 		goto done;
463 	} else if (sendpid == 0){
464 		got_privsep_exec_child(imsg_sendfds,
465 		    GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
466 	}
467 
468 	if (close(imsg_sendfds[1]) == -1) {
469 		err = got_error_from_errno("close");
470 		goto done;
471 	}
472 	imsg_init(&sendibuf, imsg_sendfds[0]);
473 	nsendfd = dup(sendfd);
474 	if (nsendfd == -1) {
475 		err = got_error_from_errno("dup");
476 		goto done;
477 	}
478 
479 	/*
480 	 * Convert reflist to pathlist since the privsep layer
481 	 * is linked into helper programs which lack reference.c.
482 	 */
483 	TAILQ_FOREACH(re, &refs, entry) {
484 		struct got_object_id *id;
485 		err = got_ref_resolve(&id, repo, re->ref);
486 		if (err)
487 			goto done;
488 		err = got_pathlist_append(&have_refs,
489 		    got_ref_get_name(re->ref), id);
490 		if (err)
491 			goto done;
492 		/*
493 		 * Also prepare the array of our object IDs which
494 		 * will be needed for generating a pack file.
495 		 */
496 		err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
497 		if (err)
498 			goto done;
499 		our_ids[nours] = id;
500 		nours++;
501 	}
502 
503 	err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
504 	    delete_branches, verbosity);
505 	if (err)
506 		goto done;
507 	nsendfd = -1;
508 
509 	err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
510 	if (err)
511 		goto done;
512 
513 	/*
514 	 * Process references reported by the server.
515 	 * Push appropriate object IDs onto the "their IDs" array.
516 	 * This array will be used to exclude objects which already
517 	 * exist on the server from our pack file.
518 	 */
519 	TAILQ_FOREACH(pe, &their_refs, entry) {
520 		const char *refname = pe->path;
521 		struct got_object_id *their_id = pe->data;
522 		int have_their_id;
523 		struct got_object *obj;
524 		struct got_reference *my_ref = NULL;
525 		int is_tag = 0;
526 
527 		/* Don't blindly trust the server to send us valid names. */
528 		if (!got_ref_name_is_valid(refname))
529 			continue;
530 
531 		if (strncmp(refname, "refs/tags/", 10) == 0)
532 			is_tag = 1;
533 		/*
534 		 * Find out whether this is a reference we want to upload.
535 		 * Otherwise we can still use this reference as a hint to
536 		 * avoid uploading any objects the server already has.
537 		 */
538 		my_ref = find_ref(&refs, refname);
539 		if (my_ref) {
540 			struct got_object_id *my_id;
541 			err = got_ref_resolve(&my_id, repo, my_ref);
542 			if (err)
543 				goto done;
544 			if (got_object_id_cmp(my_id, their_id) != 0) {
545 				if (!overwrite_refs && is_tag) {
546 					err = got_error_fmt(
547 					    GOT_ERR_SEND_TAG_EXISTS,
548 					    "%s", refname);
549 					free(my_id);
550 					goto done;
551 				}
552 				refs_to_send++;
553 			}
554 			free(my_id);
555 		}
556 
557 		/* Check if their object exists locally. */
558 		err = got_object_open(&obj, repo, their_id);
559 		if (err) {
560 			if (err->code != GOT_ERR_NO_OBJ)
561 				goto done;
562 			if (!overwrite_refs && my_ref != NULL) {
563 				err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
564 				    "%s", refname);
565 				goto done;
566 			}
567 			have_their_id = 0;
568 		} else {
569 			got_object_close(obj);
570 			have_their_id = 1;
571 		}
572 
573 		err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
574 		if (err)
575 			goto done;
576 
577 		if (have_their_id) {
578 			/* Enforce linear ancestry if required. */
579 			if (!overwrite_refs && my_ref && !is_tag) {
580 				struct got_object_id *my_id;
581 				err = got_ref_resolve(&my_id, repo, my_ref);
582 				if (err)
583 					goto done;
584 				err = check_linear_ancestry(refname, my_id,
585 				    their_id, repo, cancel_cb, cancel_arg);
586 				free(my_id);
587 				my_id = NULL;
588 				if (err)
589 					goto done;
590 			}
591 			/* Exclude any objects reachable via their ID. */
592 			their_ids[ntheirs] = got_object_id_dup(their_id);
593 			if (their_ids[ntheirs] == NULL) {
594 				err = got_error_from_errno("got_object_id_dup");
595 				goto done;
596 			}
597 			ntheirs++;
598 		} else if (!is_tag) {
599 			char *remote_refname;
600 			struct got_reference *ref;
601 			/*
602 			 * Exclude any objects which exist on the server
603 			 * according to a locally cached remote reference.
604 			 */
605 			err = get_remote_refname(&remote_refname,
606 			    remote_name, refname);
607 			if (err)
608 				goto done;
609 			err = got_ref_open(&ref, repo, remote_refname, 0);
610 			free(remote_refname);
611 			if (err) {
612 				if (err->code != GOT_ERR_NOT_REF)
613 					goto done;
614 			} else {
615 				err = got_ref_resolve(&their_ids[ntheirs],
616 				    repo, ref);
617 				got_ref_close(ref);
618 				if (err)
619 					goto done;
620 				ntheirs++;
621 			}
622 		}
623 	}
624 
625 	/* Account for any new references we are going to upload. */
626 	TAILQ_FOREACH(re, &refs, entry) {
627 		if (find_their_ref(&their_refs,
628 		    got_ref_get_name(re->ref)) == NULL)
629 			refs_to_send++;
630 	}
631 
632 	/* Account for any existing references we are going to delete. */
633 	TAILQ_FOREACH(pe, delete_branches, entry) {
634 		const char *branchname = pe->path;
635 		if (find_their_ref(&their_refs, branchname))
636 			refs_to_delete++;
637 	}
638 
639 	if (refs_to_send == 0 && refs_to_delete == 0) {
640 		got_privsep_send_stop(imsg_sendfds[0]);
641 		goto done;
642 	}
643 
644 	if (refs_to_send > 0) {
645 		struct got_ratelimit rl;
646 		got_ratelimit_init(&rl, 0, 500);
647 		memset(&ppa, 0, sizeof(ppa));
648 		ppa.progress_cb = progress_cb;
649 		ppa.progress_arg = progress_arg;
650 		err = got_pack_create(packsha1, packfd, delta_cache,
651 		    their_ids, ntheirs, our_ids, nours, repo, 0, 1,
652 		    pack_progress, &ppa, &rl, cancel_cb, cancel_arg);
653 		if (err)
654 			goto done;
655 
656 		npackfd = dup(packfd);
657 		if (npackfd == -1) {
658 			err = got_error_from_errno("dup");
659 			goto done;
660 		}
661 		err = got_privsep_send_packfd(&sendibuf, npackfd);
662 		if (err != NULL)
663 			goto done;
664 		npackfd = -1;
665 	} else {
666 		err = got_privsep_send_packfd(&sendibuf, -1);
667 		if (err != NULL)
668 			goto done;
669 	}
670 
671 	while (!done) {
672 		int success = 0;
673 		char *refname = NULL;
674 		char *errmsg = NULL;
675 
676 		if (cancel_cb) {
677 			err = (*cancel_cb)(cancel_arg);
678 			if (err)
679 				goto done;
680 		}
681 		err = got_privsep_recv_send_progress(&done, &bytes_sent,
682 		    &success, &refname, &errmsg, &sendibuf);
683 		if (err)
684 			goto done;
685 		if (refname && got_ref_name_is_valid(refname) && success &&
686 		    strncmp(refname, "refs/tags/", 10) != 0) {
687 			struct got_reference *my_ref;
688 			/*
689 			 * The server has accepted our changes.
690 			 * Update our reference in refs/remotes/ accordingly.
691 			 */
692 			my_ref = find_ref(&refs, refname);
693 			if (my_ref) {
694 				err = update_remote_ref(my_ref, remote_name,
695 				    repo);
696 				if (err)
697 					goto done;
698 			}
699 		}
700 		if (refname != NULL ||
701 		    bytes_sent_cur != bytes_sent) {
702 			err = progress_cb(progress_arg, ppa.ncolored,
703 			    ppa.nfound, ppa.ntrees, ppa.packfile_size,
704 			    ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
705 			    ppa.nobj_written, bytes_sent,
706 			    refname, errmsg, success);
707 			if (err) {
708 				free(refname);
709 				free(errmsg);
710 				goto done;
711 			}
712 			bytes_sent_cur = bytes_sent;
713 		}
714 		free(refname);
715 		free(errmsg);
716 	}
717 done:
718 	if (sendpid != -1) {
719 		if (err)
720 			got_privsep_send_stop(imsg_sendfds[0]);
721 		if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
722 			err = got_error_from_errno("waitpid");
723 	}
724 	if (packfd != -1 && close(packfd) == -1 && err == NULL)
725 		err = got_error_from_errno("close");
726 	if (delta_cache && fclose(delta_cache) == EOF && err == NULL)
727 		err = got_error_from_errno("fclose");
728 	if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
729 		err = got_error_from_errno("close");
730 	if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
731 		err = got_error_from_errno("close");
732 
733 	got_ref_list_free(&refs);
734 	got_pathlist_free(&have_refs, GOT_PATHLIST_FREE_NONE);
735 	got_pathlist_free(&their_refs, GOT_PATHLIST_FREE_NONE);
736 	for (i = 0; i < nours; i++)
737 		free(our_ids[i]);
738 	free(our_ids);
739 	for (i = 0; i < ntheirs; i++)
740 		free(their_ids[i]);
741 	free(their_ids);
742 	return err;
743 }