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