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_CMD_SEND, verbosity);
96 	else if (strcmp(proto, "git") == 0)
97 		err = got_dial_git(sendfd, host, port, server_path,
98 		    GOT_DIAL_CMD_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_common_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, 0, 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 	if (got_object_id_cmp(their_id, yca_id) != 0)
188 		err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
189 
190 	free(yca_id);
191 	return err;
192 }
193 
194 static const struct got_error *
195 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
196 {
197 	struct got_object_id **new;
198 	const size_t alloc_chunksz = 256;
199 
200 	if (*nalloc >= n)
201 		return NULL;
202 
203 	new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
204 	    sizeof(struct got_object_id));
205 	if (new == NULL)
206 		return got_error_from_errno("recallocarray");
207 
208 	*ids = new;
209 	*nalloc += alloc_chunksz;
210 	return NULL;
211 }
212 
213 static struct got_reference *
214 find_ref(struct got_reflist_head *refs, const char *refname)
215 {
216 	struct got_reflist_entry *re;
217 
218 	TAILQ_FOREACH(re, refs, entry) {
219 		if (got_path_cmp(got_ref_get_name(re->ref), refname,
220 		    strlen(got_ref_get_name(re->ref)),
221 		    strlen(refname)) == 0) {
222 			return re->ref;
223 		}
224 	}
225 
226 	return NULL;
227 }
228 
229 static struct got_pathlist_entry *
230 find_their_ref(struct got_pathlist_head *their_refs, const char *refname)
231 {
232 	struct got_pathlist_entry *pe;
233 
234 	TAILQ_FOREACH(pe, their_refs, entry) {
235 		const char *their_refname = pe->path;
236 		if (got_path_cmp(their_refname, refname,
237 		    strlen(their_refname), strlen(refname)) == 0) {
238 			return pe;
239 		}
240 	}
241 
242 	return NULL;
243 }
244 
245 static const struct got_error *
246 get_remote_refname(char **remote_refname, const char *remote_name,
247     const char *refname)
248 {
249 	if (strncmp(refname, "refs/", 5) == 0)
250 		refname += 5;
251 	if (strncmp(refname, "heads/", 6) == 0)
252 		refname += 6;
253 
254 	if (asprintf(remote_refname, "refs/remotes/%s/%s",
255 	    remote_name, refname) == -1)
256 		return got_error_from_errno("asprintf");
257 
258 	return NULL;
259 }
260 
261 static const struct got_error *
262 update_remote_ref(struct got_reference *my_ref, const char *remote_name,
263     struct got_repository *repo)
264 {
265 	const struct got_error *err, *unlock_err;
266 	struct got_object_id *my_id;
267 	struct got_reference *ref = NULL;
268 	char *remote_refname = NULL;
269 	int ref_locked = 0;
270 
271 	err = got_ref_resolve(&my_id, repo, my_ref);
272 	if (err)
273 		return err;
274 
275 	err = get_remote_refname(&remote_refname, remote_name,
276 	    got_ref_get_name(my_ref));
277 	if (err)
278 		goto done;
279 
280 	err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
281 	if (err) {
282 		if (err->code != GOT_ERR_NOT_REF)
283 			goto done;
284 		err = got_ref_alloc(&ref, remote_refname, my_id);
285 		if (err)
286 			goto done;
287 	} else {
288 		ref_locked = 1;
289 		err = got_ref_change_ref(ref, my_id);
290 		if (err)
291 			goto done;
292 	}
293 
294 	err = got_ref_write(ref, repo);
295 done:
296 	if (ref) {
297 		if (ref_locked) {
298 			unlock_err = got_ref_unlock(ref);
299 			if (unlock_err && err == NULL)
300 				err = unlock_err;
301 		}
302 		got_ref_close(ref);
303 	}
304 	free(my_id);
305 	free(remote_refname);
306 	return err;
307 }
308 
309 const struct got_error*
310 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
311     struct got_pathlist_head *tag_names,
312     struct got_pathlist_head *delete_branches,
313     int verbosity, int overwrite_refs, int sendfd,
314     struct got_repository *repo, got_send_progress_cb progress_cb,
315     void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
316 {
317 	int imsg_sendfds[2];
318 	int npackfd = -1, nsendfd = -1;
319 	int sendstatus, done = 0;
320 	const struct got_error *err;
321 	struct imsgbuf sendibuf;
322 	pid_t sendpid = -1;
323 	struct got_reflist_head refs;
324 	struct got_pathlist_head have_refs;
325 	struct got_pathlist_head their_refs;
326 	struct got_pathlist_entry *pe;
327 	struct got_reflist_entry *re;
328 	struct got_object_id **our_ids = NULL;
329 	struct got_object_id **their_ids = NULL;
330 	int i, nours = 0, ntheirs = 0;
331 	size_t nalloc_ours = 0, nalloc_theirs = 0;
332 	int refs_to_send = 0, refs_to_delete = 0;
333 	off_t bytes_sent = 0, bytes_sent_cur = 0;
334 	struct pack_progress_arg ppa;
335 	uint8_t packsha1[SHA1_DIGEST_LENGTH];
336 	int packfd = -1;
337 	FILE *delta_cache = NULL;
338 
339 	TAILQ_INIT(&refs);
340 	TAILQ_INIT(&have_refs);
341 	TAILQ_INIT(&their_refs);
342 
343 	TAILQ_FOREACH(pe, branch_names, entry) {
344 		const char *branchname = pe->path;
345 		if (strncmp(branchname, "refs/heads/", 11) != 0) {
346 			char *s;
347 			if (asprintf(&s, "refs/heads/%s", branchname) == -1) {
348 				err = got_error_from_errno("asprintf");
349 				goto done;
350 			}
351 			err = insert_ref(&refs, s, repo);
352 			free(s);
353 		} else {
354 			err = insert_ref(&refs, branchname, repo);
355 		}
356 		if (err)
357 			goto done;
358 	}
359 
360 	TAILQ_FOREACH(pe, delete_branches, entry) {
361 		const char *branchname = pe->path;
362 		struct got_reference *ref;
363 		if (strncmp(branchname, "refs/heads/", 11) != 0) {
364 			err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
365 			    branchname);
366 			goto done;
367 		}
368 		ref = find_ref(&refs, branchname);
369 		if (ref) {
370 			err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
371 			    "changes on %s will be sent to server",
372 			    branchname);
373 			goto done;
374 		}
375 	}
376 
377 	TAILQ_FOREACH(pe, tag_names, entry) {
378 		const char *tagname = pe->path;
379 		if (strncmp(tagname, "refs/tags/", 10) != 0) {
380 			char *s;
381 			if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
382 				err = got_error_from_errno("asprintf");
383 				goto done;
384 			}
385 			err = insert_ref(&refs, s, repo);
386 			free(s);
387 		} else {
388 			err = insert_ref(&refs, tagname, repo);
389 		}
390 		if (err)
391 			goto done;
392 	}
393 
394 	if (TAILQ_EMPTY(&refs) && TAILQ_EMPTY(delete_branches)) {
395 		err = got_error(GOT_ERR_SEND_EMPTY);
396 		goto done;
397 	}
398 
399 	TAILQ_FOREACH(re, &refs, entry) {
400 		struct got_object_id *id;
401 		int obj_type;
402 
403 		if (got_ref_is_symbolic(re->ref)) {
404 			err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
405 			    "cannot send symbolic reference %s",
406 			    got_ref_get_name(re->ref));
407 			goto done;
408 		}
409 
410 		err = got_ref_resolve(&id, repo, re->ref);
411 		if (err)
412 			goto done;
413 		err = got_object_get_type(&obj_type, repo, id);
414 		free(id);
415 		if (err)
416 			goto done;
417 		switch (obj_type) {
418 		case GOT_OBJ_TYPE_COMMIT:
419 		case GOT_OBJ_TYPE_TAG:
420 			break;
421 		default:
422 			err = got_error_fmt(GOT_ERR_OBJ_TYPE,
423 			    "cannot send %s", got_ref_get_name(re->ref));
424 			goto done;
425 		}
426 	}
427 
428 	packfd = got_opentempfd();
429 	if (packfd == -1) {
430 		err = got_error_from_errno("got_opentempfd");
431 		goto done;
432 	}
433 
434 	delta_cache = got_opentemp();
435 	if (delta_cache == NULL) {
436 		err = got_error_from_errno("got_opentemp");
437 		goto done;
438 	}
439 
440 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
441 		err = got_error_from_errno("socketpair");
442 		goto done;
443 	}
444 
445 	sendpid = fork();
446 	if (sendpid == -1) {
447 		err = got_error_from_errno("fork");
448 		goto done;
449 	} else if (sendpid == 0){
450 		got_privsep_exec_child(imsg_sendfds,
451 		    GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
452 	}
453 
454 	if (close(imsg_sendfds[1]) == -1) {
455 		err = got_error_from_errno("close");
456 		goto done;
457 	}
458 	imsg_init(&sendibuf, imsg_sendfds[0]);
459 	nsendfd = dup(sendfd);
460 	if (nsendfd == -1) {
461 		err = got_error_from_errno("dup");
462 		goto done;
463 	}
464 
465 	/*
466 	 * Convert reflist to pathlist since the privsep layer
467 	 * is linked into helper programs which lack reference.c.
468 	 */
469 	TAILQ_FOREACH(re, &refs, entry) {
470 		struct got_object_id *id;
471 		err = got_ref_resolve(&id, repo, re->ref);
472 		if (err)
473 			goto done;
474 		err = got_pathlist_append(&have_refs,
475 		    got_ref_get_name(re->ref), id);
476 		if (err)
477 			goto done;
478 		/*
479 		 * Also prepare the array of our object IDs which
480 		 * will be needed for generating a pack file.
481 		 */
482 		err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
483 		if (err)
484 			goto done;
485 		our_ids[nours] = id;
486 		nours++;
487 	}
488 
489 	err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
490 	    delete_branches, verbosity);
491 	if (err)
492 		goto done;
493 	nsendfd = -1;
494 
495 	err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
496 	if (err)
497 		goto done;
498 
499 	/*
500 	 * Process references reported by the server.
501 	 * Push appropriate object IDs onto the "their IDs" array.
502 	 * This array will be used to exclude objects which already
503 	 * exist on the server from our pack file.
504 	 */
505 	TAILQ_FOREACH(pe, &their_refs, entry) {
506 		const char *refname = pe->path;
507 		struct got_object_id *their_id = pe->data;
508 		int have_their_id;
509 		struct got_object *obj;
510 		struct got_reference *my_ref = NULL;
511 		int is_tag = 0;
512 
513 		/* Don't blindly trust the server to send us valid names. */
514 		if (!got_ref_name_is_valid(refname))
515 			continue;
516 
517 		if (strncmp(refname, "refs/tags/", 10) == 0)
518 			is_tag = 1;
519 		/*
520 		 * Find out whether this is a reference we want to upload.
521 		 * Otherwise we can still use this reference as a hint to
522 		 * avoid uploading any objects the server already has.
523 		 */
524 		my_ref = find_ref(&refs, refname);
525 		if (my_ref) {
526 			struct got_object_id *my_id;
527 			err = got_ref_resolve(&my_id, repo, my_ref);
528 			if (err)
529 				goto done;
530 			if (got_object_id_cmp(my_id, their_id) != 0) {
531 				if (!overwrite_refs && is_tag) {
532 					err = got_error_fmt(
533 					    GOT_ERR_SEND_TAG_EXISTS,
534 					    "%s", refname);
535 					free(my_id);
536 					goto done;
537 				}
538 				refs_to_send++;
539 			}
540 			free(my_id);
541 		}
542 
543 		/* Check if their object exists locally. */
544 		err = got_object_open(&obj, repo, their_id);
545 		if (err) {
546 			if (err->code != GOT_ERR_NO_OBJ)
547 				goto done;
548 			if (!overwrite_refs && my_ref != NULL) {
549 				err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
550 				    "%s", refname);
551 				goto done;
552 			}
553 			have_their_id = 0;
554 		} else {
555 			got_object_close(obj);
556 			have_their_id = 1;
557 		}
558 
559 		err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
560 		if (err)
561 			goto done;
562 
563 		if (have_their_id) {
564 			/* Enforce linear ancestry if required. */
565 			if (!overwrite_refs && my_ref && !is_tag) {
566 				struct got_object_id *my_id;
567 				err = got_ref_resolve(&my_id, repo, my_ref);
568 				if (err)
569 					goto done;
570 				err = check_common_ancestry(refname, my_id,
571 				    their_id, repo, cancel_cb, cancel_arg);
572 				free(my_id);
573 				my_id = NULL;
574 				if (err)
575 					goto done;
576 			}
577 			/* Exclude any objects reachable via their ID. */
578 			their_ids[ntheirs] = got_object_id_dup(their_id);
579 			if (their_ids[ntheirs] == NULL) {
580 				err = got_error_from_errno("got_object_id_dup");
581 				goto done;
582 			}
583 			ntheirs++;
584 		} else if (!is_tag) {
585 			char *remote_refname;
586 			struct got_reference *ref;
587 			/*
588 			 * Exclude any objects which exist on the server
589 			 * according to a locally cached remote reference.
590 			 */
591 			err = get_remote_refname(&remote_refname,
592 			    remote_name, refname);
593 			if (err)
594 				goto done;
595 			err = got_ref_open(&ref, repo, remote_refname, 0);
596 			free(remote_refname);
597 			if (err) {
598 				if (err->code != GOT_ERR_NOT_REF)
599 					goto done;
600 			} else {
601 				err = got_ref_resolve(&their_ids[ntheirs],
602 				    repo, ref);
603 				got_ref_close(ref);
604 				if (err)
605 					goto done;
606 				ntheirs++;
607 			}
608 		}
609 	}
610 
611 	/* Account for any new references we are going to upload. */
612 	TAILQ_FOREACH(re, &refs, entry) {
613 		if (find_their_ref(&their_refs,
614 		    got_ref_get_name(re->ref)) == NULL)
615 			refs_to_send++;
616 	}
617 
618 	/* Account for any existing references we are going to delete. */
619 	TAILQ_FOREACH(pe, delete_branches, entry) {
620 		const char *branchname = pe->path;
621 		if (find_their_ref(&their_refs, branchname))
622 			refs_to_delete++;
623 	}
624 
625 	if (refs_to_send == 0 && refs_to_delete == 0) {
626 		got_privsep_send_stop(imsg_sendfds[0]);
627 		goto done;
628 	}
629 
630 	if (refs_to_send > 0) {
631 		struct got_ratelimit rl;
632 		got_ratelimit_init(&rl, 0, 500);
633 		memset(&ppa, 0, sizeof(ppa));
634 		ppa.progress_cb = progress_cb;
635 		ppa.progress_arg = progress_arg;
636 		err = got_pack_create(packsha1, packfd, delta_cache,
637 		    their_ids, ntheirs, our_ids, nours, repo, 0, 1, 0,
638 		    pack_progress, &ppa, &rl, cancel_cb, cancel_arg);
639 		if (err)
640 			goto done;
641 
642 		npackfd = dup(packfd);
643 		if (npackfd == -1) {
644 			err = got_error_from_errno("dup");
645 			goto done;
646 		}
647 		err = got_privsep_send_packfd(&sendibuf, npackfd);
648 		if (err != NULL)
649 			goto done;
650 		npackfd = -1;
651 	} else {
652 		err = got_privsep_send_packfd(&sendibuf, -1);
653 		if (err != NULL)
654 			goto done;
655 	}
656 
657 	while (!done) {
658 		int success = 0;
659 		char *refname = NULL;
660 		char *errmsg = NULL;
661 
662 		if (cancel_cb) {
663 			err = (*cancel_cb)(cancel_arg);
664 			if (err)
665 				goto done;
666 		}
667 		err = got_privsep_recv_send_progress(&done, &bytes_sent,
668 		    &success, &refname, &errmsg, &sendibuf);
669 		if (err)
670 			goto done;
671 		if (refname && got_ref_name_is_valid(refname) && success &&
672 		    strncmp(refname, "refs/tags/", 10) != 0) {
673 			struct got_reference *my_ref;
674 			/*
675 			 * The server has accepted our changes.
676 			 * Update our reference in refs/remotes/ accordingly.
677 			 */
678 			my_ref = find_ref(&refs, refname);
679 			if (my_ref) {
680 				err = update_remote_ref(my_ref, remote_name,
681 				    repo);
682 				if (err)
683 					goto done;
684 			}
685 		}
686 		if (refname != NULL ||
687 		    bytes_sent_cur != bytes_sent) {
688 			err = progress_cb(progress_arg, ppa.ncolored,
689 			    ppa.nfound, ppa.ntrees, ppa.packfile_size,
690 			    ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
691 			    ppa.nobj_written, bytes_sent,
692 			    refname, errmsg, success);
693 			if (err) {
694 				free(refname);
695 				free(errmsg);
696 				goto done;
697 			}
698 			bytes_sent_cur = bytes_sent;
699 		}
700 		free(refname);
701 		free(errmsg);
702 	}
703 done:
704 	if (sendpid != -1) {
705 		if (err)
706 			got_privsep_send_stop(imsg_sendfds[0]);
707 		if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
708 			err = got_error_from_errno("waitpid");
709 	}
710 	if (packfd != -1 && close(packfd) == -1 && err == NULL)
711 		err = got_error_from_errno("close");
712 	if (delta_cache && fclose(delta_cache) == EOF && err == NULL)
713 		err = got_error_from_errno("fclose");
714 	if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
715 		err = got_error_from_errno("close");
716 	if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
717 		err = got_error_from_errno("close");
718 
719 	got_ref_list_free(&refs);
720 	got_pathlist_free(&have_refs, GOT_PATHLIST_FREE_NONE);
721 	got_pathlist_free(&their_refs, GOT_PATHLIST_FREE_NONE);
722 	for (i = 0; i < nours; i++)
723 		free(our_ids[i]);
724 	free(our_ids);
725 	for (i = 0; i < ntheirs; i++)
726 		free(their_ids[i]);
727 	free(their_ids);
728 	return err;
729 }