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