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/uio.h>
22 #include <sys/socket.h>
23 #include <sys/wait.h>
24 #include <sys/resource.h>
25 #include <sys/socket.h>
26 
27 #include <errno.h>
28 #include <err.h>
29 #include <fcntl.h>
30 #include <stdio.h>
31 #include <stdlib.h>
32 #include <string.h>
33 #include <stdint.h>
34 #include <unistd.h>
35 #include <zlib.h>
36 #include <ctype.h>
37 #include <limits.h>
38 #include <time.h>
39 
40 #include "got_error.h"
41 #include "got_reference.h"
42 #include "got_repository.h"
43 #include "got_path.h"
44 #include "got_cancel.h"
45 #include "got_worktree.h"
46 #include "got_object.h"
47 #include "got_opentemp.h"
48 #include "got_send.h"
49 #include "got_repository_admin.h"
50 #include "got_commit_graph.h"
51 
52 #include "got_lib_delta.h"
53 #include "got_lib_inflate.h"
54 #include "got_lib_object.h"
55 #include "got_lib_object_parse.h"
56 #include "got_lib_object_create.h"
57 #include "got_lib_pack.h"
58 #include "got_lib_sha1.h"
59 #include "got_lib_privsep.h"
60 #include "got_lib_object_cache.h"
61 #include "got_lib_repository.h"
62 #include "got_lib_pack_create.h"
63 #include "got_lib_dial.h"
64 
65 #ifndef nitems
66 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
67 #endif
68 
69 #ifndef ssizeof
70 #define ssizeof(_x) ((ssize_t)(sizeof(_x)))
71 #endif
72 
73 #ifndef MIN
74 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
75 #endif
76 
77 const struct got_error *
78 got_send_connect(pid_t *sendpid, int *sendfd, const char *proto,
79     const char *host, const char *port, const char *server_path, int verbosity)
80 {
81 	const struct got_error *err = NULL;
82 
83 	*sendpid = -1;
84 	*sendfd = -1;
85 
86 	if (strcmp(proto, "ssh") == 0 || strcmp(proto, "git+ssh") == 0)
87 		err = got_dial_ssh(sendpid, sendfd, host, port, server_path,
88 		    GOT_DIAL_DIRECTION_SEND, verbosity);
89 	else if (strcmp(proto, "git") == 0)
90 		err = got_dial_git(sendfd, host, port, server_path,
91 		    GOT_DIAL_DIRECTION_SEND);
92 	else if (strcmp(proto, "http") == 0 || strcmp(proto, "git+http") == 0)
93 		err = got_error_path(proto, GOT_ERR_NOT_IMPL);
94 	else
95 		err = got_error_path(proto, GOT_ERR_BAD_PROTO);
96 	return err;
97 }
98 
99 struct pack_progress_arg {
100     got_send_progress_cb progress_cb;
101     void *progress_arg;
102 
103     int ncolored;
104     int nfound;
105     int ntrees;
106     off_t packfile_size;
107     int ncommits;
108     int nobj_total;
109     int nobj_deltify;
110     int nobj_written;
111 };
112 
113 static const struct got_error *
114 pack_progress(void *arg, int ncolored, int nfound, int ntrees,
115     off_t packfile_size, int ncommits, int nobj_total, int nobj_deltify,
116     int nobj_written)
117 {
118 	const struct got_error *err;
119 	struct pack_progress_arg *a = arg;
120 
121 	err = a->progress_cb(a->progress_arg, ncolored, nfound, ntrees,
122 	    packfile_size, ncommits, nobj_total, nobj_deltify,
123 	    nobj_written, 0, NULL, 0);
124 	if (err)
125 		return err;
126 
127 	a->ncolored= ncolored;
128 	a->nfound = nfound;
129 	a->ntrees = ntrees;
130 	a->packfile_size = packfile_size;
131 	a->ncommits = ncommits;
132 	a->nobj_total = nobj_total;
133 	a->nobj_deltify = nobj_deltify;
134 	a->nobj_written = nobj_written;
135 	return NULL;
136 }
137 
138 static const struct got_error *
139 insert_ref(struct got_reflist_head *refs, const char *refname,
140     struct got_repository *repo)
141 {
142 	const struct got_error *err;
143 	struct got_reference *ref;
144 	struct got_reflist_entry *new;
145 
146 	err = got_ref_open(&ref, repo, refname, 0);
147 	if (err)
148 		return err;
149 
150 	err = got_reflist_insert(&new, refs, ref, got_ref_cmp_by_name, NULL);
151 	if (err || new == NULL /* duplicate */)
152 		got_ref_close(ref);
153 
154 	return err;
155 }
156 
157 static const struct got_error *
158 check_linear_ancestry(const char *refname, struct got_object_id *my_id,
159     struct got_object_id *their_id, struct got_repository *repo,
160     got_cancel_cb cancel_cb, void *cancel_arg)
161 {
162 	const struct got_error *err = NULL;
163 	struct got_object_id *yca_id;
164 	int obj_type;
165 
166 	err = got_object_get_type(&obj_type, repo, their_id);
167 	if (err)
168 		return err;
169 	if (obj_type != GOT_OBJ_TYPE_COMMIT)
170 		return got_error_fmt(GOT_ERR_OBJ_TYPE,
171 		    "bad object type on server for %s", refname);
172 
173 	err = got_commit_graph_find_youngest_common_ancestor(&yca_id,
174 	    my_id, their_id, 1, repo, cancel_cb, cancel_arg);
175 	if (err)
176 		return err;
177 	if (yca_id == NULL)
178 		return got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
179 
180 	/*
181 	 * Require a straight line of history between the two commits,
182 	 * with their commit being older than my commit.
183 	 *
184 	 * Non-linear situations such as this require a rebase:
185 	 *
186 	 * (theirs) D       F (mine)
187 	 *           \     /
188 	 *            C   E
189 	 *             \ /
190 	 *              B (yca)
191 	 *              |
192 	 *              A
193 	 */
194 	if (got_object_id_cmp(their_id, yca_id) != 0)
195 		err = got_error_fmt(GOT_ERR_SEND_ANCESTRY, "%s", refname);
196 
197 	free(yca_id);
198 	return err;
199 }
200 
201 static const struct got_error *
202 realloc_ids(struct got_object_id ***ids, size_t *nalloc, size_t n)
203 {
204 	struct got_object_id **new;
205 	const size_t alloc_chunksz = 256;
206 
207 	if (*nalloc >= n)
208 		return NULL;
209 
210 	new = recallocarray(*ids, *nalloc, *nalloc + alloc_chunksz,
211 	    sizeof(struct got_object_id));
212 	if (new == NULL)
213 		return got_error_from_errno("recallocarray");
214 
215 	*ids = new;
216 	*nalloc += alloc_chunksz;
217 	return NULL;
218 }
219 
220 static struct got_reference *
221 find_ref(struct got_reflist_head *refs, const char *refname)
222 {
223 	struct got_reflist_entry *re;
224 
225 	TAILQ_FOREACH(re, refs, entry) {
226 		if (got_path_cmp(got_ref_get_name(re->ref), refname,
227 		    strlen(got_ref_get_name(re->ref)),
228 		    strlen(refname)) == 0) {
229 			return re->ref;
230 		}
231 	}
232 
233 	return NULL;
234 }
235 
236 static struct got_pathlist_entry *
237 find_their_ref(struct got_pathlist_head *their_refs, const char *refname)
238 {
239 	struct got_pathlist_entry *pe;
240 
241 	TAILQ_FOREACH(pe, their_refs, entry) {
242 		const char *their_refname = pe->path;
243 		if (got_path_cmp(their_refname, refname,
244 		    strlen(their_refname), strlen(refname)) == 0) {
245 			return pe;
246 		}
247 	}
248 
249 	return NULL;
250 }
251 
252 static const struct got_error *
253 get_remote_refname(char **remote_refname, const char *remote_name,
254     const char *refname)
255 {
256 	if (strncmp(refname, "refs/", 5) == 0)
257 		refname += 5;
258 	if (strncmp(refname, "heads/", 6) == 0)
259 		refname += 6;
260 
261 	if (asprintf(remote_refname, "refs/remotes/%s/%s",
262 	    remote_name, refname) == -1)
263 		return got_error_from_errno("asprintf");
264 
265 	return NULL;
266 }
267 
268 static const struct got_error *
269 update_remote_ref(struct got_reference *my_ref, const char *remote_name,
270     struct got_repository *repo)
271 {
272 	const struct got_error *err, *unlock_err;
273 	struct got_object_id *my_id;
274 	struct got_reference *ref = NULL;
275 	char *remote_refname = NULL;
276 	int ref_locked = 0;
277 
278 	err = got_ref_resolve(&my_id, repo, my_ref);
279 	if (err)
280 		return err;
281 
282 	err = get_remote_refname(&remote_refname, remote_name,
283 	    got_ref_get_name(my_ref));
284 	if (err)
285 		goto done;
286 
287 	err = got_ref_open(&ref, repo, remote_refname, 1 /* lock */);
288 	if (err) {
289 		if (err->code != GOT_ERR_NOT_REF)
290 			goto done;
291 		err = got_ref_alloc(&ref, remote_refname, my_id);
292 		if (err)
293 			goto done;
294 	} else {
295 		ref_locked = 1;
296 		err = got_ref_change_ref(ref, my_id);
297 		if (err)
298 			goto done;
299 	}
300 
301 	err = got_ref_write(ref, repo);
302 done:
303 	if (ref) {
304 		if (ref_locked) {
305 			unlock_err = got_ref_unlock(ref);
306 			if (unlock_err && err == NULL)
307 				err = unlock_err;
308 		}
309 		got_ref_close(ref);
310 	}
311 	free(my_id);
312 	free(remote_refname);
313 	return err;
314 }
315 
316 const struct got_error*
317 got_send_pack(const char *remote_name, struct got_pathlist_head *branch_names,
318     struct got_pathlist_head *tag_names,
319     struct got_pathlist_head *delete_branches,
320     int verbosity, int overwrite_refs, int sendfd,
321     struct got_repository *repo, got_send_progress_cb progress_cb,
322     void *progress_arg, got_cancel_cb cancel_cb, void *cancel_arg)
323 {
324 	int imsg_sendfds[2];
325 	int npackfd = -1, nsendfd = -1;
326 	int sendstatus, done = 0;
327 	const struct got_error *err;
328 	struct imsgbuf sendibuf;
329 	pid_t sendpid = -1;
330 	struct got_reflist_head refs;
331 	struct got_pathlist_head have_refs;
332 	struct got_pathlist_head their_refs;
333 	struct got_pathlist_entry *pe;
334 	struct got_reflist_entry *re;
335 	struct got_object_id **our_ids = NULL;
336 	struct got_object_id **their_ids = NULL;
337 	int i, nours = 0, ntheirs = 0;
338 	size_t nalloc_ours = 0, nalloc_theirs = 0;
339 	int refs_to_send = 0, refs_to_delete = 0;
340 	off_t bytes_sent = 0, bytes_sent_cur = 0;
341 	struct pack_progress_arg ppa;
342 	uint8_t packsha1[SHA1_DIGEST_LENGTH];
343 	FILE *packfile = NULL;
344 
345 	TAILQ_INIT(&refs);
346 	TAILQ_INIT(&have_refs);
347 	TAILQ_INIT(&their_refs);
348 
349 	TAILQ_FOREACH(pe, branch_names, entry) {
350 		const char *branchname = pe->path;
351 		if (strncmp(branchname, "refs/heads/", 11) != 0) {
352 			char *s;
353 			if (asprintf(&s, "refs/heads/%s", branchname) == -1) {
354 				err = got_error_from_errno("asprintf");
355 				goto done;
356 			}
357 			err = insert_ref(&refs, s, repo);
358 			free(s);
359 		} else {
360 			err = insert_ref(&refs, branchname, repo);
361 		}
362 		if (err)
363 			goto done;
364 	}
365 
366 	TAILQ_FOREACH(pe, delete_branches, entry) {
367 		const char *branchname = pe->path;
368 		struct got_reference *ref;
369 		if (strncmp(branchname, "refs/heads/", 11) != 0) {
370 			err = got_error_fmt(GOT_ERR_SEND_DELETE_REF, "%s",
371 			    branchname);
372 			goto done;
373 		}
374 		ref = find_ref(&refs, branchname);
375 		if (ref) {
376 			err = got_error_fmt(GOT_ERR_SEND_DELETE_REF,
377 			    "changes on %s will be sent to server",
378 			    branchname);
379 			goto done;
380 		}
381 	}
382 
383 	TAILQ_FOREACH(pe, tag_names, entry) {
384 		const char *tagname = pe->path;
385 		if (strncmp(tagname, "refs/tags/", 10) != 0) {
386 			char *s;
387 			if (asprintf(&s, "refs/tags/%s", tagname) == -1) {
388 				err = got_error_from_errno("asprintf");
389 				goto done;
390 			}
391 			err = insert_ref(&refs, s, repo);
392 			free(s);
393 		} else {
394 			err = insert_ref(&refs, tagname, repo);
395 		}
396 		if (err)
397 			goto done;
398 	}
399 
400 	if (TAILQ_EMPTY(&refs) && TAILQ_EMPTY(delete_branches)) {
401 		err = got_error(GOT_ERR_SEND_EMPTY);
402 		goto done;
403 	}
404 
405 	TAILQ_FOREACH(re, &refs, entry) {
406 		struct got_object_id *id;
407 		int obj_type;
408 
409 		if (got_ref_is_symbolic(re->ref)) {
410 			err = got_error_fmt(GOT_ERR_BAD_REF_TYPE,
411 			    "cannot send symbolic reference %s",
412 			    got_ref_get_name(re->ref));
413 			goto done;
414 		}
415 
416 		err = got_ref_resolve(&id, repo, re->ref);
417 		if (err)
418 			goto done;
419 		err = got_object_get_type(&obj_type, repo, id);
420 		free(id);
421 		if (err)
422 			goto done;
423 		switch (obj_type) {
424 		case GOT_OBJ_TYPE_COMMIT:
425 		case GOT_OBJ_TYPE_TAG:
426 			break;
427 		default:
428 			err = got_error_fmt(GOT_ERR_OBJ_TYPE,
429 			    "cannot send %s", got_ref_get_name(re->ref));
430 			goto done;
431 		}
432 	}
433 
434 	packfile = got_opentemp();
435 	if (packfile == 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_linear_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 		memset(&ppa, 0, sizeof(ppa));
632 		ppa.progress_cb = progress_cb;
633 		ppa.progress_arg = progress_arg;
634 		err = got_pack_create(packsha1, packfile, their_ids, ntheirs,
635 		    our_ids, nours, repo, 0, 1, pack_progress, &ppa,
636 		    cancel_cb, cancel_arg);
637 		if (err)
638 			goto done;
639 
640 		if (fflush(packfile) == -1) {
641 			err = got_error_from_errno("fflush");
642 			goto done;
643 		}
644 
645 		npackfd = dup(fileno(packfile));
646 		if (npackfd == -1) {
647 			err = got_error_from_errno("dup");
648 			goto done;
649 		}
650 		err = got_privsep_send_packfd(&sendibuf, npackfd);
651 		if (err != NULL)
652 			goto done;
653 		npackfd = -1;
654 	} else {
655 		err = got_privsep_send_packfd(&sendibuf, -1);
656 		if (err != NULL)
657 			goto done;
658 	}
659 
660 	while (!done) {
661 		int success = 0;
662 		char *refname = NULL;
663 		if (cancel_cb) {
664 			err = (*cancel_cb)(cancel_arg);
665 			if (err)
666 				goto done;
667 		}
668 		err = got_privsep_recv_send_progress(&done, &bytes_sent,
669 		    &success, &refname, &sendibuf);
670 		if (err)
671 			goto done;
672 		if (refname && got_ref_name_is_valid(refname) && success &&
673 		    strncmp(refname, "refs/tags/", 10) != 0) {
674 			struct got_reference *my_ref;
675 			/*
676 			 * The server has accepted our changes.
677 			 * Update our reference in refs/remotes/ accordingly.
678 			 */
679 			my_ref = find_ref(&refs, refname);
680 			if (my_ref) {
681 				err = update_remote_ref(my_ref, remote_name,
682 				    repo);
683 				if (err)
684 					goto done;
685 			}
686 		}
687 		if (refname != NULL ||
688 		    bytes_sent_cur != bytes_sent) {
689 			err = progress_cb(progress_arg, ppa.ncolored,
690 			    ppa.nfound, ppa.ntrees, ppa.packfile_size,
691 			    ppa.ncommits, ppa.nobj_total, ppa.nobj_deltify,
692 			    ppa.nobj_written, bytes_sent,
693 			    refname, success);
694 			if (err) {
695 				free(refname);
696 				goto done;
697 			}
698 			bytes_sent_cur = bytes_sent;
699 		}
700 		free(refname);
701 	}
702 done:
703 	if (sendpid != -1) {
704 		if (err)
705 			got_privsep_send_stop(imsg_sendfds[0]);
706 		if (waitpid(sendpid, &sendstatus, 0) == -1 && err == NULL)
707 			err = got_error_from_errno("waitpid");
708 	}
709 	if (packfile && fclose(packfile) == EOF && err == NULL)
710 		err = got_error_from_errno("fclose");
711 	if (nsendfd != -1 && close(nsendfd) == -1 && err == NULL)
712 		err = got_error_from_errno("close");
713 	if (npackfd != -1 && close(npackfd) == -1 && err == NULL)
714 		err = got_error_from_errno("close");
715 
716 	got_ref_list_free(&refs);
717 	got_pathlist_free(&have_refs);
718 	got_pathlist_free(&their_refs);
719 	for (i = 0; i < nours; i++)
720 		free(our_ids[i]);
721 	free(our_ids);
722 	for (i = 0; i < ntheirs; i++)
723 		free(their_ids[i]);
724 	free(their_ids);
725 	return err;
726 }