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 <errno.h>
29 #include <err.h>
30 #include <fcntl.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <stdint.h>
35 #include <unistd.h>
36 #include <zlib.h>
37 #include <ctype.h>
38 #include <limits.h>
39 #include <time.h>
40 #include <uuid.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_sha1.h"
61 #include "got_lib_privsep.h"
62 #include "got_lib_object_cache.h"
63 #include "got_lib_repository.h"
64 #include "got_lib_pack_create.h"
65 #include "got_lib_dial.h"
66 
67 #ifndef nitems
68 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
69 #endif
70 
71 #ifndef ssizeof
72 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
73 #endif
74 
75 #ifndef MIN
76 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
77 #endif
78 
79 const struct got_error *
80 got_send_connect(pid_t *sendpid, int *sendfd, const char *proto,
81     const char *host, const char *port, const char *server_path, int verbosity)
82 {
83 	const struct got_error *err = NULL;
84 
85 	*sendpid = -1;
86 	*sendfd = -1;
87 
88 	if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
89 		err = got_dial_ssh(sendpid, sendfd, host, port, server_path,
90 		    GOT_DIAL_DIRECTION_SEND, verbosity);
91 	else if (strcmp(proto, "git") == 0)
92 		err = got_dial_git(sendfd, host, port, server_path,
93 		    GOT_DIAL_DIRECTION_SEND);
94 	else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
95 		err = got_error_path(proto, GOT_ERR_NOT_IMPL);
96 	else
97 		err = got_error_path(proto, GOT_ERR_BAD_PROTO);
98 	return err;
99 }
100 
101 struct pack_progress_arg {
102     got_send_progress_cb progress_cb;
103     void *progress_arg;
104 
105     off_t packfile_size;
106     int ncommits;
107     int nobj_total;
108     int nobj_deltify;
109     int nobj_written;
110 };
111 
112 static const struct got_error *
113 pack_progress(void *arg, off_t packfile_size, int ncommits,
114     int nobj_total, int nobj_deltify, int nobj_written)
115 {
116 	const struct got_error *err;
117 	struct pack_progress_arg *a = arg;
118 
119 	err = a->progress_cb(a->progress_arg, packfile_size, ncommits,
120 	    nobj_total, nobj_deltify, nobj_written, 0, NULL, 0);
121 	if (err)
122 		return err;
123 
124 	a->packfile_size = packfile_size;
125 	a->ncommits = ncommits;
126 	a->nobj_total = nobj_total;
127 	a->nobj_deltify = nobj_deltify;
128 	a->nobj_written = nobj_written;
129 	return NULL;
130 }
131 
132 static const struct got_error *
133 insert_ref(struct got_reflist_head *refs, const char *refname,
134     struct got_repository *repo)
135 {
136 	const struct got_error *err;
137 	struct got_reference *ref;
138 	struct got_reflist_entry *new;
139 
140 	err = got_ref_open(&ref, repo, refname, 0);
141 	if (err)
142 		return err;
143 
144 	err = got_reflist_insert(&new, refs, ref, got_ref_cmp_by_name, NULL);
145 	if (err || new == NULL /* duplicate */)
146 		got_ref_close(ref);
147 
148 	return err;
149 }
150 
151 static const struct got_error *
152 check_linear_ancestry(const char *refname, struct got_object_id *my_id,
153     struct got_object_id *their_id, struct got_repository *repo,
154     got_cancel_cb cancel_cb, void *cancel_arg)
155 {
156 	const struct got_error *err = NULL;
157 	struct got_object_id *yca_id;
158 	int obj_type;
159 
160 	err = got_object_get_type(&obj_type, repo, their_id);
161 	if (err)
162 		return err;
163 	if (obj_type != GOT_OBJ_TYPE_COMMIT)
164 		return got_error_fmt(GOT_ERR_OBJ_TYPE,
165 		    "bad object type on server for %s", refname);
166 
167 	err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
168 	    my_id, their_id, 1, repo, cancel_cb, cancel_arg);
169 	if (err)
170 		return err;
171 	if (yca_id == NULL)
172 		return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
173 
174 	/*
175 	 * Require a straight line of history between the two commits,
176 	 * with their commit being older than my commit.
177 	 *
178 	 * Non-linear situations such as this require a rebase:
179 	 *
180 	 * (theirs) D       F (mine)
181 	 *           \     /
182 	 *            C   E
183 	 *             \ /
184 	 *              B (yca)
185 	 *              |
186 	 *              A
187 	 */
188 	if (got_object_id_cmp(their_id, yca_id) != 0)
189 		err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
190 
191 	free(yca_id);
192 	return err;
193 }
194 
195 static const struct got_error *
196 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
197 {
198 	struct got_object_id **new;
199 	const size_t alloc_chunksz = 256;
200 
201 	if (*nalloc >= n)
202 		return NULL;
203 
204 	new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
205 	    sizeof(struct got_object_id));
206 	if (new == NULL)
207 		return got_error_from_errno("recallocarray");
208 
209 	*ids = new;
210 	*nalloc += alloc_chunksz;
211 	return NULL;
212 }
213 
214 static struct got_reference *
215 find_ref(struct got_reflist_head *refs, const char *refname)
216 {
217 	struct got_reflist_entry *re;
218 
219 	TAILQ_FOREACH(re, refs, entry) {
220 		if (got_path_cmp(got_ref_get_name(re->ref), refname,
221 		    strlen(got_ref_get_name(re->ref)),
222 		    strlen(refname)) == 0) {
223 			return re->ref;
224 		}
225 	}
226 
227 	return NULL;
228 }
229 
230 static struct got_pathlist_entry *
231 find_their_ref(struct got_pathlist_head *their_refs, const char *refname)
232 {
233 	struct got_pathlist_entry *pe;
234 
235 	TAILQ_FOREACH(pe, their_refs, entry) {
236 		const char *their_refname = pe->path;
237 		if (got_path_cmp(their_refname, refname,
238 		    strlen(their_refname), strlen(refname)) == 0) {
239 			return pe;
240 		}
241 	}
242 
243 	return NULL;
244 }
245 
246 static const struct got_error *
247 get_remote_refname(char **remote_refname, const char *remote_name,
248     const char *refname)
249 {
250 	if (strncmp(refname, "refs/", 5) == 0)
251 		refname += 5;
252 	if (strncmp(refname, "heads/", 6) == 0)
253 		refname += 6;
254 
255 	if (asprintf(remote_refname, "refs/remotes/%s/%s",
256 	    remote_name, refname) == -1)
257 		return got_error_from_errno("asprintf");
258 
259 	return NULL;
260 }
261 
262 static const struct got_error *
263 update_remote_ref(struct got_reference *my_ref, const char *remote_name,
264     struct got_repository *repo)
265 {
266 	const struct got_error *err, *unlock_err;
267 	struct got_object_id *my_id;
268 	struct got_reference *ref = NULL;
269 	char *remote_refname = NULL;
270 	int ref_locked = 0;
271 
272 	err = got_ref_resolve(&my_id, repo, my_ref);
273 	if (err)
274 		return err;
275 
276 	err = get_remote_refname(&remote_refname, remote_name,
277 	    got_ref_get_name(my_ref));
278 	if (err)
279 		goto done;
280 
281 	err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
282 	if (err) {
283 		if (err->code != GOT_ERR_NOT_REF)
284 			goto done;
285 		err = got_ref_alloc(&ref, remote_refname, my_id);
286 		if (err)
287 			goto done;
288 	} else {
289 		ref_locked = 1;
290 		err = got_ref_change_ref(ref, my_id);
291 		if (err)
292 			goto done;
293 	}
294 
295 	err = got_ref_write(ref, repo);
296 done:
297 	if (ref) {
298 		if (ref_locked) {
299 			unlock_err = got_ref_unlock(ref);
300 			if (unlock_err && err == NULL)
301 				err = unlock_err;
302 		}
303 		got_ref_close(ref);
304 	}
305 	free(my_id);
306 	free(remote_refname);
307 	return err;
308 }
309 
310 const struct got_error*
311 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
312     struct got_pathlist_head *tag_names,
313     struct got_pathlist_head *delete_branches,
314     int verbosity, int overwrite_refs, int sendfd,
315     struct got_repository *repo, got_send_progress_cb progress_cb,
316     void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
317 {
318 	int imsg_sendfds[2];
319 	int npackfd = -1, nsendfd = -1;
320 	int sendstatus, done = 0;
321 	const struct got_error *err;
322 	struct imsgbuf sendibuf;
323 	pid_t sendpid = -1;
324 	struct got_reflist_head refs;
325 	struct got_pathlist_head have_refs;
326 	struct got_pathlist_head their_refs;
327 	struct got_pathlist_entry *pe;
328 	struct got_reflist_entry *re;
329 	struct got_object_id **our_ids = NULL;
330 	struct got_object_id **their_ids = NULL;
331 	int i, nours = 0, ntheirs = 0;
332 	size_t nalloc_ours = 0, nalloc_theirs = 0;
333 	int refs_to_send = 0, refs_to_delete = 0;
334 	off_t bytes_sent = 0;
335 	struct pack_progress_arg ppa;
336 	uint8_t packsha1[SHA1_DIGEST_LENGTH];
337 	FILE *packfile = 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 	packfile = got_opentemp();
429 	if (packfile == NULL) {
430 		err = got_error_from_errno("got_opentemp");
431 		goto done;
432 	}
433 
434 	if (socketpair(AF_UNIX, SOCK_STREAM, PF_UNSPEC, imsg_sendfds) == -1) {
435 		err = got_error_from_errno("socketpair");
436 		goto done;
437 	}
438 
439 	sendpid = fork();
440 	if (sendpid == -1) {
441 		err = got_error_from_errno("fork");
442 		goto done;
443 	} else if (sendpid == 0){
444 		got_privsep_exec_child(imsg_sendfds,
445 		    GOT_PATH_PROG_SEND_PACK, got_repo_get_path(repo));
446 	}
447 
448 	if (close(imsg_sendfds[1]) == -1) {
449 		err = got_error_from_errno("close");
450 		goto done;
451 	}
452 	imsg_init(&sendibuf, imsg_sendfds[0]);
453 	nsendfd = dup(sendfd);
454 	if (nsendfd == -1) {
455 		err = got_error_from_errno("dup");
456 		goto done;
457 	}
458 
459 	/*
460 	 * Convert reflist to pathlist since the privsep layer
461 	 * is linked into helper programs which lack reference.c.
462 	 */
463 	TAILQ_FOREACH(re, &refs, entry) {
464 		struct got_object_id *id;
465 		err = got_ref_resolve(&id, repo, re->ref);
466 		if (err)
467 			goto done;
468 		err = got_pathlist_append(&have_refs,
469 		    got_ref_get_name(re->ref), id);
470 		if (err)
471 			goto done;
472 		/*
473 		 * Also prepare the array of our object IDs which
474 		 * will be needed for generating a pack file.
475 		 */
476 		err = realloc_ids(&our_ids, &nalloc_ours, nours + 1);
477 		if (err)
478 			goto done;
479 		our_ids[nours] = id;
480 		nours++;
481 	}
482 
483 	err = got_privsep_send_send_req(&sendibuf, nsendfd, &have_refs,
484 	    delete_branches, verbosity);
485 	if (err)
486 		goto done;
487 	nsendfd = -1;
488 
489 	err = got_privsep_recv_send_remote_refs(&their_refs, &sendibuf);
490 	if (err)
491 		goto done;
492 
493 	/*
494 	 * Process references reported by the server.
495 	 * Push appropriate object IDs onto the "their IDs" array.
496 	 * This array will be used to exclude objects which already
497 	 * exist on the server from our pack file.
498 	 */
499 	TAILQ_FOREACH(pe, &their_refs, entry) {
500 		const char *refname = pe->path;
501 		struct got_object_id *their_id = pe->data;
502 		int have_their_id;
503 		struct got_object *obj;
504 		struct got_reference *my_ref = NULL;
505 		int is_tag = 0;
506 
507 		/* Don't blindly trust the server to send us valid names. */
508 		if (!got_ref_name_is_valid(refname))
509 			continue;
510 
511 		/*
512 		 * Find out whether this is a reference we want to upload.
513 		 * Otherwise we can still use this reference as a hint to
514 		 * avoid uploading any objects the server already has.
515 		 */
516 		my_ref = find_ref(&refs, refname);
517 		if (my_ref) {
518 			struct got_object_id *my_id;
519 			err = got_ref_resolve(&my_id, repo, my_ref);
520 			if (err)
521 				goto done;
522 			if (got_object_id_cmp(my_id, their_id) != 0)
523 				refs_to_send++;
524 			free(my_id);
525 
526 		}
527 
528 		if (strncmp(refname, "refs/tags/", 10) == 0)
529 			is_tag = 1;
530 
531 		/* Prevent tags from being overwritten by default. */ 
532 		if (!overwrite_refs && my_ref && is_tag) {
533 			err = got_error_fmt(GOT_ERR_SEND_TAG_EXISTS,
534 			    "%s", refname);
535 			goto done;
536 		}
537 
538 		/* Check if their object exists locally. */
539 		err = got_object_open(&obj, repo, their_id);
540 		if (err) {
541 			if (err->code != GOT_ERR_NO_OBJ)
542 				goto done;
543 			if (!overwrite_refs && my_ref != NULL) {
544 				err = got_error_fmt(GOT_ERR_SEND_ANCESTRY,
545 				    "%s", refname);
546 				goto done;
547 			}
548 			have_their_id = 0;
549 		} else {
550 			got_object_close(obj);
551 			have_their_id = 1;
552 		}
553 
554 		err = realloc_ids(&their_ids, &nalloc_theirs, ntheirs + 1);
555 		if (err)
556 			goto done;
557 
558 		if (have_their_id) {
559 			/* Enforce linear ancestry if required. */
560 			if (!overwrite_refs && my_ref && !is_tag) {
561 				struct got_object_id *my_id;
562 				err = got_ref_resolve(&my_id, repo, my_ref);
563 				if (err)
564 					goto done;
565 				err = check_linear_ancestry(refname, my_id,
566 				    their_id, repo, cancel_cb, cancel_arg);
567 				free(my_id);
568 				my_id = NULL;
569 				if (err)
570 					goto done;
571 			}
572 			/* Exclude any objects reachable via their ID. */
573 			their_ids[ntheirs] = got_object_id_dup(their_id);
574 			if (their_ids[ntheirs] == NULL) {
575 				err = got_error_from_errno("got_object_id_dup");
576 				goto done;
577 			}
578 			ntheirs++;
579 		} else if (!is_tag) {
580 			char *remote_refname;
581 			struct got_reference *ref;
582 			/*
583 			 * Exclude any objects which exist on the server
584 			 * according to a locally cached remote reference.
585 			 */
586 			err = get_remote_refname(&remote_refname,
587 			    remote_name, refname);
588 			if (err)
589 				goto done;
590 			err = got_ref_open(&ref, repo, remote_refname, 0);
591 			free(remote_refname);
592 			if (err) {
593 				if (err->code != GOT_ERR_NOT_REF)
594 					goto done;
595 			} else {
596 				err = got_ref_resolve(&their_ids[ntheirs],
597 				    repo, ref);
598 				got_ref_close(ref);
599 				if (err)
600 					goto done;
601 				ntheirs++;
602 			}
603 		}
604 	}
605 
606 	/* Account for any new references we are going to upload. */
607 	TAILQ_FOREACH(re, &refs, entry) {
608 		if (find_their_ref(&their_refs,
609 		    got_ref_get_name(re->ref)) == NULL)
610 			refs_to_send++;
611 	}
612 
613 	/* Account for any existing references we are going to delete. */
614 	TAILQ_FOREACH(pe, delete_branches, entry) {
615 		const char *branchname = pe->path;
616 		if (find_their_ref(&their_refs, branchname))
617 			refs_to_delete++;
618 	}
619 
620 	if (refs_to_send == 0 && refs_to_delete == 0) {
621 		got_privsep_send_stop(imsg_sendfds[0]);
622 		goto done;
623 	}
624 
625 	if (refs_to_send > 0) {
626 		memset(&ppa, 0, sizeof(ppa));
627 		ppa.progress_cb = progress_cb;
628 		ppa.progress_arg = progress_arg;
629 		err = got_pack_create(packsha1, packfile, their_ids, ntheirs,
630 		    our_ids, nours, repo, 0, 1, pack_progress, &ppa,
631 		    cancel_cb, cancel_arg);
632 		if (err)
633 			goto done;
634 
635 		if (fflush(packfile) == -1) {
636 			err = got_error_from_errno("fflush");
637 			goto done;
638 		}
639 
640 		npackfd = dup(fileno(packfile));
641 		if (npackfd == -1) {
642 			err = got_error_from_errno("dup");
643 			goto done;
644 		}
645 		err = got_privsep_send_packfd(&sendibuf, npackfd);
646 		if (err != NULL)
647 			goto done;
648 		npackfd = -1;
649 	} else {
650 		err = got_privsep_send_packfd(&sendibuf, -1);
651 		if (err != NULL)
652 			goto done;
653 	}
654 
655 	while (!done) {
656 		int success = 0;
657 		char *refname = NULL;
658 		off_t bytes_sent_cur = 0;
659 		if (cancel_cb) {
660 			err = (*cancel_cb)(cancel_arg);
661 			if (err)
662 				goto done;
663 		}
664 		err = got_privsep_recv_send_progress(&done, &bytes_sent,
665 		    &success, &refname, &sendibuf);
666 		if (err)
667 			goto done;
668 		if (refname && got_ref_name_is_valid(refname) && success &&
669 		    strncmp(refname, "refs/tags/", 10) != 0) {
670 			struct got_reference *my_ref;
671 			/*
672 			 * The server has accepted our changes.
673 			 * Update our reference in refs/remotes/ accordingly.
674 			 */
675 			my_ref = find_ref(&refs, refname);
676 			if (my_ref) {
677 				err = update_remote_ref(my_ref, remote_name,
678 				    repo);
679 				if (err)
680 					goto done;
681 			}
682 		}
683 		if (refname != NULL ||
684 		    bytes_sent_cur != bytes_sent) {
685 			err = progress_cb(progress_arg, ppa.packfile_size,
686 			    ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
687 			    ppa.nobj_written, bytes_sent,
688 			    refname, success);
689 			if (err) {
690 				free(refname);
691 				goto done;
692 			}
693 			bytes_sent_cur = bytes_sent;
694 		}
695 		free(refname);
696 	}
697 done:
698 	if (sendpid != -1) {
699 		if (err)
700 			got_privsep_send_stop(imsg_sendfds[0]);
701 		if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
702 			err = got_error_from_errno("waitpid");
703 	}
704 	if (packfile && fclose(packfile) == EOF && err == NULL)
705 		err = got_error_from_errno("fclose");
706 	if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
707 		err = got_error_from_errno("close");
708 	if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
709 		err = got_error_from_errno("close");
710 
711 	got_ref_list_free(&refs);
712 	got_pathlist_free(&have_refs);
713 	got_pathlist_free(&their_refs);
714 	for (i = 0; i < nours; i++)
715 		free(our_ids[i]);
716 	free(our_ids);
717 	for (i = 0; i < ntheirs; i++)
718 		free(their_ids[i]);
719 	free(their_ids);
720 	return err;
721 }