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