1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include <sys/stat.h>
18 #include <sys/types.h>
19 #include <sys/queue.h>
20 #include <sys/uio.h>
21 #include <sys/time.h>
22 #include <sys/mman.h>
23 
24 #include <inttypes.h>
25 #include <limits.h>
26 #include <signal.h>
27 #include <stdint.h>
28 #include <imsg.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <sha1.h>
33 #include <sha2.h>
34 #include <unistd.h>
35 #include <zlib.h>
36 
37 #include "got_error.h"
38 #include "got_object.h"
39 #include "got_path.h"
40 
41 #include "got_lib_delta.h"
42 #include "got_lib_delta_cache.h"
43 #include "got_lib_object.h"
44 #include "got_lib_object_cache.h"
45 #include "got_lib_object_parse.h"
46 #include "got_lib_object_idset.h"
47 #include "got_lib_privsep.h"
48 #include "got_lib_pack.h"
49 
50 #ifndef nitems
51 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
52 #endif
53 
54 static volatile sig_atomic_t sigint_received;
55 
56 static void
57 catch_sigint(int signo)
58 {
59 	sigint_received = 1;
60 }
61 
62 static const struct got_error *
63 open_object(struct got_object **obj, struct got_pack *pack,
64     struct got_packidx *packidx, int idx, struct got_object_id *id,
65     struct got_object_cache *objcache)
66 {
67 	const struct got_error *err;
68 
69 	err = got_packfile_open_object(obj, pack, packidx, idx, id);
70 	if (err)
71 		return err;
72 	(*obj)->refcnt++;
73 
74 	err = got_object_cache_add(objcache, id, *obj);
75 	if (err) {
76 		if (err->code == GOT_ERR_OBJ_EXISTS ||
77 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
78 			err = NULL;
79 		return err;
80 	}
81 	(*obj)->refcnt++;
82 	return NULL;
83 }
84 
85 static const struct got_error *
86 object_request(struct imsg *imsg, struct imsgbuf *ibuf, struct got_pack *pack,
87     struct got_packidx *packidx, struct got_object_cache *objcache)
88 {
89 	const struct got_error *err = NULL;
90 	struct got_imsg_packed_object iobj;
91 	struct got_object *obj;
92 	struct got_object_id id;
93 	size_t datalen;
94 
95 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
96 	if (datalen != sizeof(iobj))
97 		return got_error(GOT_ERR_PRIVSEP_LEN);
98 	memcpy(&iobj, imsg->data, sizeof(iobj));
99 	memcpy(&id, &iobj.id, sizeof(id));
100 
101 	obj = got_object_cache_get(objcache, &id);
102 	if (obj) {
103 		obj->refcnt++;
104 	} else {
105 		err = open_object(&obj, pack, packidx, iobj.idx, &id,
106 		    objcache);
107 		if (err)
108 			goto done;
109 	}
110 
111 	err = got_privsep_send_obj(ibuf, obj);
112 done:
113 	got_object_close(obj);
114 	return err;
115 }
116 
117 static const struct got_error *
118 open_commit(struct got_commit_object **commit, struct got_pack *pack,
119     struct got_packidx *packidx, int obj_idx, struct got_object_id *id,
120     struct got_object_cache *objcache)
121 {
122 	const struct got_error *err = NULL;
123 	struct got_object *obj = NULL;
124 	uint8_t *buf = NULL;
125 	size_t len;
126 
127 	*commit = NULL;
128 
129 	obj = got_object_cache_get(objcache, id);
130 	if (obj) {
131 		obj->refcnt++;
132 	} else {
133 		err = open_object(&obj, pack, packidx, obj_idx, id,
134 		    objcache);
135 		if (err)
136 			return err;
137 	}
138 
139 	err = got_packfile_extract_object_to_mem(&buf, &len, obj, pack);
140 	if (err)
141 		goto done;
142 
143 	obj->size = len;
144 
145 	err = got_object_parse_commit(commit, buf, len);
146 done:
147 	got_object_close(obj);
148 	free(buf);
149 	return err;
150 }
151 
152 static const struct got_error *
153 commit_request(struct imsg *imsg, struct imsgbuf *ibuf, struct got_pack *pack,
154     struct got_packidx *packidx, struct got_object_cache *objcache)
155 {
156 	const struct got_error *err = NULL;
157 	struct got_imsg_packed_object iobj;
158 	struct got_commit_object *commit = NULL;
159 	struct got_object_id id;
160 	size_t datalen;
161 
162 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
163 	if (datalen != sizeof(iobj))
164 		return got_error(GOT_ERR_PRIVSEP_LEN);
165 	memcpy(&iobj, imsg->data, sizeof(iobj));
166 	memcpy(&id, &iobj.id, sizeof(id));
167 
168 	err = open_commit(&commit, pack, packidx, iobj.idx, &id, objcache);
169 	if (err)
170 		goto done;
171 
172 	err = got_privsep_send_commit(ibuf, commit);
173 done:
174 	if (commit)
175 		got_object_commit_close(commit);
176 	if (err) {
177 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
178 			err = NULL;
179 		else
180 			got_privsep_send_error(ibuf, err);
181 	}
182 
183 	return err;
184 }
185 
186 static const struct got_error *
187 open_tree(uint8_t **buf, struct got_parsed_tree_entry **entries, size_t *nentries,
188     size_t *nentries_alloc, struct got_pack *pack, struct got_packidx *packidx,
189     int obj_idx, struct got_object_id *id, struct got_object_cache *objcache)
190 {
191 	const struct got_error *err = NULL;
192 	struct got_object *obj = NULL;
193 	size_t len;
194 
195 	*buf = NULL;
196 	*nentries = 0;
197 
198 	obj = got_object_cache_get(objcache, id);
199 	if (obj) {
200 		obj->refcnt++;
201 	} else {
202 		err = open_object(&obj, pack, packidx, obj_idx, id,
203 		    objcache);
204 		if (err)
205 			return err;
206 	}
207 
208 	err = got_packfile_extract_object_to_mem(buf, &len, obj, pack);
209 	if (err)
210 		goto done;
211 
212 	obj->size = len;
213 
214 	err = got_object_parse_tree(entries, nentries, nentries_alloc,
215 	    *buf, len);
216 done:
217 	got_object_close(obj);
218 	if (err) {
219 		free(*buf);
220 		*buf = NULL;
221 	}
222 	return err;
223 }
224 
225 static const struct got_error *
226 tree_request(struct imsg *imsg, struct imsgbuf *ibuf, struct got_pack *pack,
227     struct got_packidx *packidx, struct got_object_cache *objcache,
228     struct got_parsed_tree_entry **entries, size_t *nentries,
229     size_t *nentries_alloc)
230 {
231 	const struct got_error *err = NULL;
232 	struct got_imsg_packed_object iobj;
233 	uint8_t *buf = NULL;
234 	struct got_object_id id;
235 	size_t datalen;
236 
237 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
238 	if (datalen != sizeof(iobj))
239 		return got_error(GOT_ERR_PRIVSEP_LEN);
240 	memcpy(&iobj, imsg->data, sizeof(iobj));
241 	memcpy(&id, &iobj.id, sizeof(id));
242 
243 	err = open_tree(&buf, entries, nentries, nentries_alloc,
244 	    pack, packidx, iobj.idx, &id, objcache);
245 	if (err)
246 		return err;
247 
248 	err = got_privsep_send_tree(ibuf, *entries, *nentries);
249 	free(buf);
250 	if (err) {
251 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
252 			err = NULL;
253 		else
254 			got_privsep_send_error(ibuf, err);
255 	}
256 
257 	return err;
258 }
259 
260 static const struct got_error *
261 receive_file(FILE **f, struct imsgbuf *ibuf, uint32_t imsg_code)
262 {
263 	const struct got_error *err;
264 	struct imsg imsg;
265 	size_t datalen;
266 
267 	err = got_privsep_recv_imsg(&imsg, ibuf, 0);
268 	if (err)
269 		return err;
270 
271 	if (imsg.hdr.type != imsg_code) {
272 		err = got_error(GOT_ERR_PRIVSEP_MSG);
273 		goto done;
274 	}
275 
276 	datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
277 	if (datalen != 0) {
278 		err = got_error(GOT_ERR_PRIVSEP_LEN);
279 		goto done;
280 	}
281 	if (imsg.fd == -1) {
282 		err = got_error(GOT_ERR_PRIVSEP_NO_FD);
283 		goto done;
284 	}
285 
286 	*f = fdopen(imsg.fd, "w+");
287 	if (*f == NULL) {
288 		err = got_error_from_errno("fdopen");
289 		close(imsg.fd);
290 		goto done;
291 	}
292 done:
293 	imsg_free(&imsg);
294 	return err;
295 }
296 
297 static const struct got_error *
298 receive_tempfile(FILE **f, const char *mode, struct imsg *imsg,
299     struct imsgbuf *ibuf)
300 {
301 	size_t datalen;
302 
303 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
304 	if (datalen != 0)
305 		return got_error(GOT_ERR_PRIVSEP_LEN);
306 
307 	if (imsg->fd == -1)
308 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
309 
310 	*f = fdopen(imsg->fd, mode);
311 	if (*f == NULL)
312 		return got_error_from_errno("fdopen");
313 	imsg->fd = -1;
314 
315 	return NULL;
316 }
317 
318 static const struct got_error *
319 blob_request(struct imsg *imsg, struct imsgbuf *ibuf, struct got_pack *pack,
320     struct got_packidx *packidx, struct got_object_cache *objcache,
321     FILE *basefile, FILE *accumfile)
322 {
323 	const struct got_error *err = NULL;
324 	struct got_imsg_packed_object iobj;
325 	struct got_object *obj = NULL;
326 	FILE *outfile = NULL;
327 	struct got_object_id id;
328 	size_t datalen;
329 	uint64_t blob_size;
330 	uint8_t *buf = NULL;
331 
332 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
333 	if (datalen != sizeof(iobj))
334 		return got_error(GOT_ERR_PRIVSEP_LEN);
335 	memcpy(&iobj, imsg->data, sizeof(iobj));
336 	memcpy(&id, &iobj.id, sizeof(id));
337 
338 	obj = got_object_cache_get(objcache, &id);
339 	if (obj) {
340 		obj->refcnt++;
341 	} else {
342 		err = open_object(&obj, pack, packidx, iobj.idx, &id,
343 		    objcache);
344 		if (err)
345 			return err;
346 	}
347 
348 	err = receive_file(&outfile, ibuf, GOT_IMSG_BLOB_OUTFD);
349 	if (err)
350 		goto done;
351 
352 	if (obj->flags & GOT_OBJ_FLAG_DELTIFIED) {
353 		err = got_pack_get_max_delta_object_size(&blob_size, obj, pack);
354 		if (err)
355 			goto done;
356 	} else
357 		blob_size = obj->size;
358 
359 	if (blob_size <= GOT_PRIVSEP_INLINE_BLOB_DATA_MAX)
360 		err = got_packfile_extract_object_to_mem(&buf, &obj->size,
361 		    obj, pack);
362 	else
363 		err = got_packfile_extract_object(pack, obj, outfile, basefile,
364 		    accumfile);
365 	if (err)
366 		goto done;
367 
368 	err = got_privsep_send_blob(ibuf, obj->size, obj->hdrlen, buf);
369 done:
370 	free(buf);
371 	if (outfile && fclose(outfile) == EOF && err == NULL)
372 		err = got_error_from_errno("fclose");
373 	got_object_close(obj);
374 	if (err && err->code != GOT_ERR_PRIVSEP_PIPE)
375 		got_privsep_send_error(ibuf, err);
376 
377 	return err;
378 }
379 
380 static const struct got_error *
381 tag_request(struct imsg *imsg, struct imsgbuf *ibuf, struct got_pack *pack,
382     struct got_packidx *packidx, struct got_object_cache *objcache)
383 {
384 	const struct got_error *err = NULL;
385 	struct got_imsg_packed_object iobj;
386 	struct got_object *obj = NULL;
387 	struct got_tag_object *tag = NULL;
388 	uint8_t *buf = NULL;
389 	size_t len;
390 	struct got_object_id id;
391 	size_t datalen;
392 
393 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
394 	if (datalen != sizeof(iobj))
395 		return got_error(GOT_ERR_PRIVSEP_LEN);
396 	memcpy(&iobj, imsg->data, sizeof(iobj));
397 	memcpy(&id, &iobj.id, sizeof(id));
398 
399 	obj = got_object_cache_get(objcache, &id);
400 	if (obj) {
401 		obj->refcnt++;
402 	} else {
403 		err = open_object(&obj, pack, packidx, iobj.idx, &id,
404 		    objcache);
405 		if (err)
406 			return err;
407 	}
408 
409 	err = got_packfile_extract_object_to_mem(&buf, &len, obj, pack);
410 	if (err)
411 		goto done;
412 
413 	obj->size = len;
414 	err = got_object_parse_tag(&tag, buf, len);
415 	if (err)
416 		goto done;
417 
418 	err = got_privsep_send_tag(ibuf, tag);
419 done:
420 	free(buf);
421 	got_object_close(obj);
422 	if (tag)
423 		got_object_tag_close(tag);
424 	if (err) {
425 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
426 			err = NULL;
427 		else
428 			got_privsep_send_error(ibuf, err);
429 	}
430 
431 	return err;
432 }
433 
434 static struct got_parsed_tree_entry *
435 find_entry_by_name(struct got_parsed_tree_entry *entries, int nentries,
436     const char *name, size_t len)
437 {
438 	struct got_parsed_tree_entry *pte;
439 	int cmp, i;
440 
441 	/* Note that tree entries are sorted in strncmp() order. */
442 	for (i = 0; i < nentries; i++) {
443 		pte = &entries[i];
444 		cmp = strncmp(pte->name, name, len);
445 		if (cmp < 0)
446 			continue;
447 		if (cmp > 0)
448 			break;
449 		if (pte->name[len] == '\0')
450 			return pte;
451 	}
452 	return NULL;
453 }
454 
455 static const struct got_error *
456 tree_path_changed(int *changed, uint8_t **buf1, uint8_t **buf2,
457     struct got_parsed_tree_entry **entries1, size_t *nentries1,
458     size_t *nentries_alloc1,
459     struct got_parsed_tree_entry **entries2, size_t *nentries2,
460     size_t *nentries_alloc2,
461     const char *path, struct got_pack *pack, struct got_packidx *packidx,
462     struct imsgbuf *ibuf, struct got_object_cache *objcache)
463 {
464 	const struct got_error *err = NULL;
465 	struct got_parsed_tree_entry *pte1 = NULL, *pte2 = NULL;
466 	const char *seg, *s;
467 	size_t seglen;
468 
469 	*changed = 0;
470 
471 	/* We not do support comparing the root path. */
472 	if (got_path_is_root_dir(path))
473 		return got_error_path(path, GOT_ERR_BAD_PATH);
474 
475 	s = path;
476 	while (*s == '/')
477 		s++;
478 	seg = s;
479 	seglen = 0;
480 	while (*s) {
481 		if (*s != '/') {
482 			s++;
483 			seglen++;
484 			if (*s)
485 				continue;
486 		}
487 
488 		pte1 = find_entry_by_name(*entries1, *nentries1, seg, seglen);
489 		if (pte1 == NULL) {
490 			err = got_error(GOT_ERR_NO_OBJ);
491 			break;
492 		}
493 
494 		pte2 = find_entry_by_name(*entries2, *nentries2, seg, seglen);
495 		if (pte2 == NULL) {
496 			*changed = 1;
497 			break;
498 		}
499 
500 		if (pte1->mode != pte2->mode) {
501 			*changed = 1;
502 			break;
503 		}
504 
505 		if (memcmp(pte1->id, pte2->id, SHA1_DIGEST_LENGTH) == 0) {
506 			*changed = 0;
507 			break;
508 		}
509 
510 		if (*s == '\0') { /* final path element */
511 			*changed = 1;
512 			break;
513 		}
514 
515 		seg = s + 1;
516 		s++;
517 		seglen = 0;
518 		if (*s) {
519 			struct got_object_id id1, id2;
520 			int idx;
521 
522 			memcpy(id1.sha1, pte1->id, SHA1_DIGEST_LENGTH);
523 			idx = got_packidx_get_object_idx(packidx, &id1);
524 			if (idx == -1) {
525 				err = got_error_no_obj(&id1);
526 				break;
527 			}
528 			*nentries1 = 0;
529 			free(*buf1);
530 			*buf1 = NULL;
531 			err = open_tree(buf1, entries1, nentries1,
532 			    nentries_alloc1, pack, packidx, idx, &id1,
533 			    objcache);
534 			pte1 = NULL;
535 			if (err)
536 				break;
537 
538 			memcpy(id2.sha1, pte2->id, SHA1_DIGEST_LENGTH);
539 			idx = got_packidx_get_object_idx(packidx, &id2);
540 			if (idx == -1) {
541 				err = got_error_no_obj(&id2);
542 				break;
543 			}
544 			*nentries2 = 0;
545 			free(*buf2);
546 			*buf2 = NULL;
547 			err = open_tree(buf2, entries2, nentries2,
548 			    nentries_alloc2, pack, packidx, idx, &id2,
549 			    objcache);
550 			pte2 = NULL;
551 			if (err)
552 				break;
553 		}
554 	}
555 
556 	return err;
557 }
558 
559 static const struct got_error *
560 send_traversed_commits(struct got_object_id *commit_ids, size_t ncommits,
561     struct imsgbuf *ibuf)
562 {
563 	struct ibuf *wbuf;
564 	size_t i;
565 
566 	wbuf = imsg_create(ibuf, GOT_IMSG_TRAVERSED_COMMITS, 0, 0,
567 	    sizeof(struct got_imsg_traversed_commits) +
568 	    ncommits * sizeof(commit_ids[0]));
569 	if (wbuf == NULL)
570 		return got_error_from_errno("imsg_create TRAVERSED_COMMITS");
571 
572 	if (imsg_add(wbuf, &ncommits, sizeof(ncommits)) == -1)
573 		return got_error_from_errno("imsg_add TRAVERSED_COMMITS");
574 
575 	for (i = 0; i < ncommits; i++) {
576 		struct got_object_id *id = &commit_ids[i];
577 		if (imsg_add(wbuf, id, sizeof(*id)) == -1) {
578 			return got_error_from_errno(
579 			    "imsg_add TRAVERSED_COMMITS");
580 		}
581 	}
582 
583 	wbuf->fd = -1;
584 	imsg_close(ibuf, wbuf);
585 
586 	return got_privsep_flush_imsg(ibuf);
587 }
588 
589 static const struct got_error *
590 send_commit_traversal_done(struct imsgbuf *ibuf)
591 {
592 	if (imsg_compose(ibuf, GOT_IMSG_COMMIT_TRAVERSAL_DONE, 0, 0, -1,
593 	    NULL, 0) == -1)
594 		return got_error_from_errno("imsg_compose TRAVERSAL_DONE");
595 
596 	return got_privsep_flush_imsg(ibuf);
597 }
598 
599 static const struct got_error *
600 commit_traversal_request(struct imsg *imsg, struct imsgbuf *ibuf,
601     struct got_pack *pack, struct got_packidx *packidx,
602     struct got_object_cache *objcache)
603 {
604 	const struct got_error *err = NULL;
605 	struct got_imsg_packed_object iobj;
606 	struct got_object_qid *pid;
607 	struct got_commit_object *commit = NULL, *pcommit = NULL;
608 	struct got_parsed_tree_entry *entries = NULL, *pentries = NULL;
609 	size_t nentries = 0, nentries_alloc = 0;
610 	size_t pnentries = 0, pnentries_alloc = 0;
611 	struct got_object_id id;
612 	size_t datalen, path_len;
613 	char *path = NULL;
614 	const int min_alloc = 64;
615 	int changed = 0, ncommits = 0, nallocated = 0;
616 	struct got_object_id *commit_ids = NULL;
617 
618 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
619 	if (datalen < sizeof(iobj))
620 		return got_error(GOT_ERR_PRIVSEP_LEN);
621 	memcpy(&iobj, imsg->data, sizeof(iobj));
622 	memcpy(&id, &iobj.id, sizeof(id));
623 
624 	path_len = datalen - sizeof(iobj) - 1;
625 	if (path_len < 0)
626 		return got_error(GOT_ERR_PRIVSEP_LEN);
627 	if (path_len > 0) {
628 		path = imsg->data + sizeof(iobj);
629 		if (path[path_len] != '\0')
630 			return got_error(GOT_ERR_PRIVSEP_LEN);
631 	}
632 
633 	nallocated = min_alloc;
634 	commit_ids = reallocarray(NULL, nallocated, sizeof(*commit_ids));
635 	if (commit_ids == NULL)
636 		return got_error_from_errno("reallocarray");
637 
638 	do {
639 		const size_t max_datalen = MAX_IMSGSIZE - IMSG_HEADER_SIZE;
640 		int idx;
641 
642 		if (sigint_received) {
643 			err = got_error(GOT_ERR_CANCELLED);
644 			goto done;
645 		}
646 
647 		if (commit == NULL) {
648 			idx = got_packidx_get_object_idx(packidx, &id);
649 			if (idx == -1)
650 				break;
651 			err = open_commit(&commit, pack, packidx,
652 			    idx, &id, objcache);
653 			if (err) {
654 				if (err->code != GOT_ERR_NO_OBJ)
655 					goto done;
656 				err = NULL;
657 				break;
658 			}
659 		}
660 
661 		if (sizeof(struct got_imsg_traversed_commits) +
662 		    ncommits * sizeof(commit_ids[0]) >= max_datalen) {
663 			err = send_traversed_commits(commit_ids, ncommits,
664 			    ibuf);
665 			if (err)
666 				goto done;
667 			ncommits = 0;
668 		}
669 		ncommits++;
670 		if (ncommits > nallocated) {
671 			struct got_object_id *new;
672 			nallocated += min_alloc;
673 			new = reallocarray(commit_ids, nallocated,
674 			    sizeof(*commit_ids));
675 			if (new == NULL) {
676 				err = got_error_from_errno("reallocarray");
677 				goto done;
678 			}
679 			commit_ids = new;
680 		}
681 		memcpy(&commit_ids[ncommits - 1], &id, sizeof(id));
682 
683 		pid = STAILQ_FIRST(&commit->parent_ids);
684 		if (pid == NULL)
685 			break;
686 
687 		idx = got_packidx_get_object_idx(packidx, &pid->id);
688 		if (idx == -1)
689 			break;
690 
691 		err = open_commit(&pcommit, pack, packidx, idx, &pid->id,
692 		    objcache);
693 		if (err) {
694 			if (err->code != GOT_ERR_NO_OBJ)
695 				goto done;
696 			err = NULL;
697 			break;
698 		}
699 
700 		if (path[0] == '/' && path[1] == '\0') {
701 			if (got_object_id_cmp(pcommit->tree_id,
702 			    commit->tree_id) != 0) {
703 				changed = 1;
704 				break;
705 			}
706 		} else {
707 			int pidx;
708 			uint8_t *buf = NULL, *pbuf = NULL;
709 
710 			idx = got_packidx_get_object_idx(packidx,
711 			    commit->tree_id);
712 			if (idx == -1)
713 				break;
714 			pidx = got_packidx_get_object_idx(packidx,
715 			    pcommit->tree_id);
716 			if (pidx == -1)
717 				break;
718 
719 			err = open_tree(&buf, &entries, &nentries,
720 			    &nentries_alloc, pack, packidx, idx,
721 			    commit->tree_id, objcache);
722 			if (err)
723 				goto done;
724 			err = open_tree(&pbuf, &pentries, &pnentries,
725 			    &pnentries_alloc, pack, packidx, pidx,
726 			    pcommit->tree_id, objcache);
727 			if (err) {
728 				free(buf);
729 				goto done;
730 			}
731 
732 			err = tree_path_changed(&changed, &buf, &pbuf,
733 			    &entries, &nentries, &nentries_alloc,
734 			    &pentries, &pnentries, &pnentries_alloc,
735 			    path, pack, packidx, ibuf, objcache);
736 
737 			nentries = 0;
738 			free(buf);
739 			pnentries = 0;
740 			free(pbuf);
741 			if (err) {
742 				if (err->code != GOT_ERR_NO_OBJ)
743 					goto done;
744 				err = NULL;
745 				break;
746 			}
747 		}
748 
749 		if (!changed) {
750 			memcpy(&id, &pid->id, sizeof(id));
751 			got_object_commit_close(commit);
752 			commit = pcommit;
753 			pcommit = NULL;
754 		}
755 	} while (!changed);
756 
757 	if (ncommits > 0) {
758 		err = send_traversed_commits(commit_ids, ncommits, ibuf);
759 		if (err)
760 			goto done;
761 
762 		if (changed) {
763 			err = got_privsep_send_commit(ibuf, commit);
764 			if (err)
765 				goto done;
766 		}
767 	}
768 	err = send_commit_traversal_done(ibuf);
769 done:
770 	free(commit_ids);
771 	if (commit)
772 		got_object_commit_close(commit);
773 	if (pcommit)
774 		got_object_commit_close(pcommit);
775 	free(entries);
776 	free(pentries);
777 	if (err) {
778 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
779 			err = NULL;
780 		else
781 			got_privsep_send_error(ibuf, err);
782 	}
783 
784 	return err;
785 }
786 
787 static const struct got_error *
788 raw_object_request(struct imsg *imsg, struct imsgbuf *ibuf,
789     struct got_pack *pack, struct got_packidx *packidx,
790     struct got_object_cache *objcache, FILE *basefile, FILE *accumfile)
791 {
792 	const struct got_error *err = NULL;
793 	uint8_t *buf = NULL;
794 	uint64_t size = 0;
795 	FILE *outfile = NULL;
796 	struct got_imsg_packed_object iobj;
797 	struct got_object *obj;
798 	struct got_object_id id;
799 	size_t datalen;
800 
801 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
802 	if (datalen != sizeof(iobj))
803 		return got_error(GOT_ERR_PRIVSEP_LEN);
804 	memcpy(&iobj, imsg->data, sizeof(iobj));
805 	memcpy(&id, &iobj.id, sizeof(id));
806 
807 	obj = got_object_cache_get(objcache, &id);
808 	if (obj) {
809 		obj->refcnt++;
810 	} else {
811 		err = open_object(&obj, pack, packidx, iobj.idx, &id,
812 		    objcache);
813 		if (err)
814 			return err;
815 	}
816 
817 	err = receive_file(&outfile, ibuf, GOT_IMSG_RAW_OBJECT_OUTFD);
818 	if (err)
819 		return err;
820 
821 	if (obj->flags & GOT_OBJ_FLAG_DELTIFIED) {
822 		err = got_pack_get_max_delta_object_size(&size, obj, pack);
823 		if (err)
824 			goto done;
825 	} else
826 		size = obj->size;
827 
828 	if (size <= GOT_PRIVSEP_INLINE_OBJECT_DATA_MAX)
829 		err = got_packfile_extract_object_to_mem(&buf, &obj->size,
830 		    obj, pack);
831 	else
832 		err = got_packfile_extract_object(pack, obj, outfile, basefile,
833 		    accumfile);
834 	if (err)
835 		goto done;
836 
837 	err = got_privsep_send_raw_obj(ibuf, obj->size, obj->hdrlen, buf);
838 done:
839 	free(buf);
840 	if (outfile && fclose(outfile) == EOF && err == NULL)
841 		err = got_error_from_errno("fclose");
842 	got_object_close(obj);
843 	if (err && err->code != GOT_ERR_PRIVSEP_PIPE)
844 		got_privsep_send_error(ibuf, err);
845 
846 	return err;
847 }
848 
849 static const struct got_error *
850 get_base_object_id(struct got_object_id *base_id, struct got_packidx *packidx,
851     off_t base_offset)
852 {
853 	const struct got_error *err;
854 	int idx;
855 
856 	err = got_packidx_get_offset_idx(&idx, packidx, base_offset);
857 	if (err)
858 		return err;
859 	if (idx == -1)
860 		return got_error(GOT_ERR_BAD_PACKIDX);
861 
862 	return got_packidx_get_object_id(base_id, packidx, idx);
863 }
864 
865 static const struct got_error *
866 raw_delta_request(struct imsg *imsg, struct imsgbuf *ibuf,
867     FILE *delta_outfile, struct got_pack *pack,
868     struct got_packidx *packidx)
869 {
870 	const struct got_error *err = NULL;
871 	struct got_imsg_raw_delta_request req;
872 	size_t datalen, delta_size, delta_compressed_size;
873 	off_t delta_offset, delta_data_offset;
874 	uint8_t *delta_buf = NULL;
875 	struct got_object_id id, base_id;
876 	off_t base_offset, delta_out_offset = 0;
877 	uint64_t base_size = 0, result_size = 0;
878 	size_t w;
879 
880 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
881 	if (datalen != sizeof(req))
882 		return got_error(GOT_ERR_PRIVSEP_LEN);
883 	memcpy(&req, imsg->data, sizeof(req));
884 	memcpy(&id, &req.id, sizeof(id));
885 
886 	imsg->fd = -1;
887 
888 	err = got_packfile_extract_raw_delta(&delta_buf, &delta_size,
889 	    &delta_compressed_size, &delta_offset, &delta_data_offset,
890 	    &base_offset, &base_id, &base_size, &result_size,
891 	    pack, packidx, req.idx);
892 	if (err)
893 		goto done;
894 
895 	/*
896 	 * If this is an offset delta we must determine the base
897 	 * object ID ourselves.
898 	 */
899 	if (base_offset != 0) {
900 		err = get_base_object_id(&base_id, packidx, base_offset);
901 		if (err)
902 			goto done;
903 	}
904 
905 	delta_out_offset = ftello(delta_outfile);
906 	w = fwrite(delta_buf, 1, delta_compressed_size, delta_outfile);
907 	if (w != delta_compressed_size) {
908 		err = got_ferror(delta_outfile, GOT_ERR_IO);
909 		goto done;
910 	}
911 	if (fflush(delta_outfile) == -1) {
912 		err = got_error_from_errno("fflush");
913 		goto done;
914 	}
915 
916 	err = got_privsep_send_raw_delta(ibuf, base_size, result_size,
917 	    delta_size, delta_compressed_size, delta_offset, delta_out_offset,
918 	    &base_id);
919 done:
920 	free(delta_buf);
921 	return err;
922 }
923 
924 struct search_deltas_arg {
925 	struct imsgbuf *ibuf;
926 	struct got_packidx *packidx;
927 	struct got_pack *pack;
928 	struct got_object_idset *idset;
929 	struct got_imsg_reused_delta deltas[GOT_IMSG_REUSED_DELTAS_MAX_NDELTAS];
930 	size_t ndeltas;
931 };
932 
933 static const struct got_error *
934 search_delta_for_object(struct got_object_id *id, void *data, void *arg)
935 {
936 	const struct got_error *err;
937 	struct search_deltas_arg *a = arg;
938 	int obj_idx;
939 	uint8_t *delta_buf = NULL;
940 	uint64_t base_size, result_size;
941 	size_t delta_size, delta_compressed_size;
942 	off_t delta_offset, delta_data_offset, base_offset;
943 	struct got_object_id base_id;
944 
945 	if (sigint_received)
946 		return got_error(GOT_ERR_CANCELLED);
947 
948 	obj_idx = got_packidx_get_object_idx(a->packidx, id);
949 	if (obj_idx == -1)
950 		return NULL; /* object not present in our pack file */
951 
952 	err = got_packfile_extract_raw_delta(&delta_buf, &delta_size,
953 	    &delta_compressed_size, &delta_offset, &delta_data_offset,
954 	    &base_offset, &base_id, &base_size, &result_size,
955 	    a->pack, a->packidx, obj_idx);
956 	if (err) {
957 		if (err->code == GOT_ERR_OBJ_TYPE)
958 			return NULL; /* object not stored as a delta */
959 		return err;
960 	}
961 
962 	/*
963 	 * If this is an offset delta we must determine the base
964 	 * object ID ourselves.
965 	 */
966 	if (base_offset != 0) {
967 		err = get_base_object_id(&base_id, a->packidx, base_offset);
968 		if (err)
969 			goto done;
970 	}
971 
972 	if (got_object_idset_contains(a->idset, &base_id)) {
973 		struct got_imsg_reused_delta *delta;
974 
975 		delta = &a->deltas[a->ndeltas++];
976 		memcpy(&delta->id, id, sizeof(delta->id));
977 		memcpy(&delta->base_id, &base_id, sizeof(delta->base_id));
978 		delta->base_size = base_size;
979 		delta->result_size = result_size;
980 		delta->delta_size = delta_size;
981 		delta->delta_compressed_size = delta_compressed_size;
982 		delta->delta_offset = delta_data_offset;
983 
984 		if (a->ndeltas >= GOT_IMSG_REUSED_DELTAS_MAX_NDELTAS) {
985 			err = got_privsep_send_reused_deltas(a->ibuf,
986 			    a->deltas, a->ndeltas);
987 			if (err)
988 				goto done;
989 			a->ndeltas = 0;
990 		}
991 	}
992 done:
993 	free(delta_buf);
994 	return err;
995 }
996 
997 static const struct got_error *
998 recv_object_ids(struct got_object_idset *idset, struct imsgbuf *ibuf)
999 {
1000 	const struct got_error *err = NULL;
1001 	int done = 0;
1002 	struct got_object_id *ids;
1003 	size_t nids, i;
1004 
1005 	for (;;) {
1006 		err = got_privsep_recv_object_idlist(&done, &ids, &nids, ibuf);
1007 		if (err || done)
1008 			break;
1009 		for (i = 0; i < nids; i++) {
1010 			err = got_object_idset_add(idset, &ids[i], NULL);
1011 			if (err) {
1012 				free(ids);
1013 				return err;
1014 			}
1015 		}
1016 		free(ids);
1017 	}
1018 
1019 	return err;
1020 }
1021 
1022 static const struct got_error *
1023 recv_object_id_queue(struct got_object_id_queue *queue,
1024     struct got_object_idset *queued_ids, struct imsgbuf *ibuf)
1025 {
1026 	const struct got_error *err = NULL;
1027 	int done = 0;
1028 	struct got_object_qid *qid;
1029 	struct got_object_id *ids;
1030 	size_t nids, i;
1031 
1032 	for (;;) {
1033 		err = got_privsep_recv_object_idlist(&done, &ids, &nids, ibuf);
1034 		if (err || done)
1035 			break;
1036 		for (i = 0; i < nids; i++) {
1037 			err = got_object_qid_alloc_partial(&qid);
1038 			if (err)
1039 				return err;
1040 			memcpy(&qid->id, &ids[i], sizeof(qid->id));
1041 			STAILQ_INSERT_TAIL(queue, qid, entry);
1042 			err = got_object_idset_add(queued_ids, &qid->id, NULL);
1043 			if (err)
1044 				return err;
1045 		}
1046 	}
1047 
1048 	return err;
1049 }
1050 
1051 static const struct got_error *
1052 delta_reuse_request(struct imsg *imsg, struct imsgbuf *ibuf,
1053     struct got_pack *pack, struct got_packidx *packidx)
1054 {
1055 	const struct got_error *err = NULL;
1056 	struct got_object_idset *idset;
1057 	struct search_deltas_arg sda;
1058 
1059 	idset = got_object_idset_alloc();
1060 	if (idset == NULL)
1061 		return got_error_from_errno("got_object_idset_alloc");
1062 
1063 	err = recv_object_ids(idset, ibuf);
1064 	if (err)
1065 		return err;
1066 
1067 	memset(&sda, 0, sizeof(sda));
1068 	sda.ibuf = ibuf;
1069 	sda.idset = idset;
1070 	sda.pack = pack;
1071 	sda.packidx = packidx;
1072 	err = got_object_idset_for_each(idset, search_delta_for_object, &sda);
1073 	if (err)
1074 		goto done;
1075 
1076 	if (sda.ndeltas > 0) {
1077 		err = got_privsep_send_reused_deltas(ibuf, sda.deltas,
1078 		    sda.ndeltas);
1079 		if (err)
1080 			goto done;
1081 	}
1082 
1083 	err = got_privsep_send_reused_deltas_done(ibuf);
1084 done:
1085 	got_object_idset_free(idset);
1086 	return err;
1087 }
1088 
1089 static const struct got_error *
1090 receive_packidx(struct got_packidx **packidx, struct imsgbuf *ibuf)
1091 {
1092 	const struct got_error *err = NULL;
1093 	struct imsg imsg;
1094 	struct got_imsg_packidx ipackidx;
1095 	size_t datalen;
1096 	struct got_packidx *p;
1097 
1098 	*packidx = NULL;
1099 
1100 	err = got_privsep_recv_imsg(&imsg, ibuf, 0);
1101 	if (err)
1102 		return err;
1103 
1104 	p = calloc(1, sizeof(*p));
1105 	if (p == NULL) {
1106 		err = got_error_from_errno("calloc");
1107 		goto done;
1108 	}
1109 
1110 	if (imsg.hdr.type != GOT_IMSG_PACKIDX) {
1111 		err = got_error(GOT_ERR_PRIVSEP_MSG);
1112 		goto done;
1113 	}
1114 
1115 	if (imsg.fd == -1) {
1116 		err = got_error(GOT_ERR_PRIVSEP_NO_FD);
1117 		goto done;
1118 	}
1119 
1120 	datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1121 	if (datalen != sizeof(ipackidx)) {
1122 		err = got_error(GOT_ERR_PRIVSEP_LEN);
1123 		goto done;
1124 	}
1125 	memcpy(&ipackidx, imsg.data, sizeof(ipackidx));
1126 
1127 	p->len = ipackidx.len;
1128 	p->fd = dup(imsg.fd);
1129 	if (p->fd == -1) {
1130 		err = got_error_from_errno("dup");
1131 		goto done;
1132 	}
1133 	if (lseek(p->fd, 0, SEEK_SET) == -1) {
1134 		err = got_error_from_errno("lseek");
1135 		goto done;
1136 	}
1137 
1138 #ifndef GOT_PACK_NO_MMAP
1139 	if (p->len > 0 && p->len <= SIZE_MAX) {
1140 		p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
1141 		if (p->map == MAP_FAILED)
1142 			p->map = NULL; /* fall back to read(2) */
1143 	}
1144 #endif
1145 	err = got_packidx_init_hdr(p, 1, ipackidx.packfile_size);
1146 done:
1147 	if (err) {
1148 		if (imsg.fd != -1)
1149 			close(imsg.fd);
1150 		got_packidx_close(p);
1151 	} else
1152 		*packidx = p;
1153 	imsg_free(&imsg);
1154 	return err;
1155 }
1156 
1157 static const struct got_error *
1158 send_tree_enumeration_done(struct imsgbuf *ibuf)
1159 {
1160 	if (imsg_compose(ibuf, GOT_IMSG_TREE_ENUMERATION_DONE, 0, 0, -1,
1161 	    NULL, 0) == -1)
1162 		return got_error_from_errno("imsg_compose TREE_ENUMERATION_DONE");
1163 
1164 	return got_privsep_flush_imsg(ibuf);
1165 }
1166 
1167 struct enumerated_tree {
1168 	struct got_object_id id;
1169 	char *path;
1170 	uint8_t *buf;
1171 	struct got_parsed_tree_entry *entries;
1172 	int nentries;
1173 };
1174 
1175 static const struct got_error *
1176 enumerate_tree(int *have_all_entries, struct imsgbuf *ibuf, size_t *totlen,
1177     struct got_object_id *tree_id,
1178     const char *path, struct got_pack *pack, struct got_packidx *packidx,
1179     struct got_object_cache *objcache, struct got_object_idset *idset,
1180     struct enumerated_tree **trees, size_t *nalloc, size_t *ntrees)
1181 {
1182 	const struct got_error *err = NULL;
1183 	struct got_object_id_queue ids;
1184 	struct got_object_qid *qid;
1185 	uint8_t *buf = NULL;
1186 	struct got_parsed_tree_entry *entries = NULL;
1187 	size_t nentries = 0, nentries_alloc = 0, i;
1188 	struct enumerated_tree *tree;
1189 
1190 	*ntrees = 0;
1191 	*have_all_entries = 1;
1192 	STAILQ_INIT(&ids);
1193 
1194 	err = got_object_qid_alloc_partial(&qid);
1195 	if (err)
1196 		return err;
1197 	memcpy(&qid->id, tree_id, sizeof(*tree_id));
1198 	qid->data = strdup(path);
1199 	if (qid->data == NULL) {
1200 		err = got_error_from_errno("strdup");
1201 		goto done;
1202 	}
1203 	STAILQ_INSERT_TAIL(&ids, qid, entry);
1204 	qid = NULL;
1205 
1206 	/* Traverse the tree hierarchy, gather tree object IDs and paths. */
1207 	do {
1208 		const char *path;
1209 		int idx, i;
1210 
1211 		if (sigint_received) {
1212 			err = got_error(GOT_ERR_CANCELLED);
1213 			goto done;
1214 		}
1215 
1216 		qid = STAILQ_FIRST(&ids);
1217 		STAILQ_REMOVE_HEAD(&ids, entry);
1218 		path = qid->data;
1219 
1220 		idx = got_packidx_get_object_idx(packidx, &qid->id);
1221 		if (idx == -1) {
1222 			*have_all_entries = 0;
1223 			break;
1224 		}
1225 
1226 		err = open_tree(&buf, &entries, &nentries, &nentries_alloc,
1227 		    pack, packidx, idx, &qid->id, objcache);
1228 		if (err) {
1229 			if (err->code != GOT_ERR_NO_OBJ)
1230 				goto done;
1231 		}
1232 
1233 		err = got_object_idset_add(idset, &qid->id, NULL);
1234 		if (err)
1235 			goto done;
1236 
1237 		for (i = 0; i < nentries; i++) {
1238 			struct got_object_qid *eqid = NULL;
1239 			struct got_parsed_tree_entry *pte = &entries[i];
1240 			char *p;
1241 
1242 			if (!S_ISDIR(pte->mode))
1243 				continue;
1244 
1245 			err = got_object_qid_alloc_partial(&eqid);
1246 			if (err)
1247 				goto done;
1248 			memcpy(eqid->id.sha1, pte->id, sizeof(eqid->id.sha1));
1249 
1250 			if (got_object_idset_contains(idset, &eqid->id)) {
1251 				got_object_qid_free(eqid);
1252 				continue;
1253 			}
1254 
1255 			if (asprintf(&p, "%s%s%s", path,
1256 			    got_path_is_root_dir(path) ? "" : "/",
1257 			    pte->name) == -1) {
1258 				err = got_error_from_errno("asprintf");
1259 				got_object_qid_free(eqid);
1260 				goto done;
1261 			}
1262 			eqid->data = p;
1263 			STAILQ_INSERT_TAIL(&ids, eqid, entry);
1264 		}
1265 
1266 		if (*ntrees >= *nalloc) {
1267 			struct enumerated_tree *new;
1268 			new = recallocarray(*trees, *nalloc, *nalloc + 16,
1269 			    sizeof(*new));
1270 			if (new == NULL) {
1271 				err = got_error_from_errno("malloc");
1272 				goto done;
1273 			}
1274 			*trees = new;
1275 			*nalloc += 16;
1276 		}
1277 		tree = &(*trees)[*ntrees];
1278 		(*ntrees)++;
1279 		memcpy(&tree->id, &qid->id, sizeof(tree->id));
1280 		tree->path = qid->data;
1281 		tree->buf = buf;
1282 		buf = NULL;
1283 		tree->entries = entries;
1284 		entries = NULL;
1285 		nentries_alloc = 0;
1286 		tree->nentries = nentries;
1287 		nentries = 0;
1288 
1289 		got_object_qid_free(qid);
1290 		qid = NULL;
1291 	} while (!STAILQ_EMPTY(&ids));
1292 
1293 	if (*have_all_entries) {
1294 		int i;
1295 		/*
1296 		 * We have managed to traverse all entries in the hierarchy.
1297 		 * Tell the main process what we have found.
1298 		 */
1299 		for (i = 0; i < *ntrees; i++) {
1300 			tree = &(*trees)[i];
1301 			err = got_privsep_send_enumerated_tree(totlen,
1302 			    ibuf, &tree->id, tree->path, tree->entries,
1303 			    tree->nentries);
1304 			if (err)
1305 				goto done;
1306 			free(tree->buf);
1307 			tree->buf = NULL;
1308 			free(tree->path);
1309 			tree->path = NULL;
1310 			free(tree->entries);
1311 			tree->entries = NULL;
1312 		}
1313 		*ntrees = 0; /* don't loop again below to free memory */
1314 
1315 		err = send_tree_enumeration_done(ibuf);
1316 	} else {
1317 		/*
1318 		 * We can only load fully packed tree hierarchies on
1319 		 * behalf of the main process, otherwise the main process
1320 		 * gets a wrong idea about which tree objects have
1321 		 * already been traversed.
1322 		 * Indicate a missing entry for the root of this tree.
1323 		 * The main process should continue by loading this
1324 		 * entire tree the slow way.
1325 		 */
1326 		err = got_privsep_send_enumerated_tree(totlen, ibuf,
1327 		    tree_id, "/", NULL, -1);
1328 		if (err)
1329 			goto done;
1330 	}
1331 done:
1332 	free(buf);
1333 	free(entries);
1334 	for (i = 0; i < *ntrees; i++) {
1335 		tree = &(*trees)[i];
1336 		free(tree->buf);
1337 		tree->buf = NULL;
1338 		free(tree->path);
1339 		tree->path = NULL;
1340 		free(tree->entries);
1341 		tree->entries = NULL;
1342 	}
1343 	if (qid)
1344 		free(qid->data);
1345 	got_object_qid_free(qid);
1346 	got_object_id_queue_free(&ids);
1347 	if (err) {
1348 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
1349 			err = NULL;
1350 		else
1351 			got_privsep_send_error(ibuf, err);
1352 	}
1353 
1354 	return err;
1355 }
1356 
1357 static const struct got_error *
1358 enumeration_request(struct imsg *imsg, struct imsgbuf *ibuf,
1359     struct got_pack *pack, struct got_packidx *packidx,
1360     struct got_object_cache *objcache)
1361 {
1362 	const struct got_error *err = NULL;
1363 	struct got_object_id_queue commit_ids;
1364 	const struct got_object_id_queue *parents = NULL;
1365 	struct got_object_qid *qid = NULL;
1366 	struct got_object *obj = NULL;
1367 	struct got_commit_object *commit = NULL;
1368 	struct got_object_id *tree_id = NULL;
1369 	size_t totlen = 0;
1370 	struct got_object_idset *idset, *queued_ids = NULL;
1371 	int i, idx, have_all_entries = 1;
1372 	struct enumerated_tree *trees = NULL;
1373 	size_t ntrees = 0, nalloc = 16;
1374 
1375 	STAILQ_INIT(&commit_ids);
1376 
1377 	trees = calloc(nalloc, sizeof(*trees));
1378 	if (trees == NULL)
1379 		return got_error_from_errno("calloc");
1380 
1381 	idset = got_object_idset_alloc();
1382 	if (idset == NULL) {
1383 		err = got_error_from_errno("got_object_idset_alloc");
1384 		goto done;
1385 	}
1386 
1387 	queued_ids = got_object_idset_alloc();
1388 	if (queued_ids == NULL) {
1389 		err = got_error_from_errno("got_object_idset_alloc");
1390 		goto done;
1391 	}
1392 
1393 	err = recv_object_id_queue(&commit_ids, queued_ids, ibuf);
1394 	if (err)
1395 		goto done;
1396 
1397 	if (STAILQ_EMPTY(&commit_ids)) {
1398 		err = got_error(GOT_ERR_PRIVSEP_MSG);
1399 		goto done;
1400 	}
1401 
1402 	err = recv_object_ids(idset, ibuf);
1403 	if (err)
1404 		goto done;
1405 
1406 	while (!STAILQ_EMPTY(&commit_ids)) {
1407 		if (sigint_received) {
1408 			err = got_error(GOT_ERR_CANCELLED);
1409 			goto done;
1410 		}
1411 
1412 		qid = STAILQ_FIRST(&commit_ids);
1413 		STAILQ_REMOVE_HEAD(&commit_ids, entry);
1414 
1415 		if (got_object_idset_contains(idset, &qid->id)) {
1416 			got_object_qid_free(qid);
1417 			qid = NULL;
1418 			continue;
1419 		}
1420 
1421 		idx = got_packidx_get_object_idx(packidx, &qid->id);
1422 		if (idx == -1) {
1423 			have_all_entries = 0;
1424 			break;
1425 		}
1426 
1427 		err = open_object(&obj, pack, packidx, idx, &qid->id,
1428 		    objcache);
1429 		if (err)
1430 			goto done;
1431 		if (obj->type == GOT_OBJ_TYPE_TAG) {
1432 			struct got_tag_object *tag;
1433 			uint8_t *buf;
1434 			size_t len;
1435 			err = got_packfile_extract_object_to_mem(&buf,
1436 			    &len, obj, pack);
1437 			if (err)
1438 				goto done;
1439 			obj->size = len;
1440 			err = got_object_parse_tag(&tag, buf, len);
1441 			if (err) {
1442 				free(buf);
1443 				goto done;
1444 			}
1445 			idx = got_packidx_get_object_idx(packidx, &tag->id);
1446 			if (idx == -1) {
1447 				have_all_entries = 0;
1448 				break;
1449 			}
1450 			err = open_commit(&commit, pack, packidx, idx,
1451 			    &tag->id, objcache);
1452 			got_object_tag_close(tag);
1453 			free(buf);
1454 			if (err)
1455 				goto done;
1456 		} else if (obj->type == GOT_OBJ_TYPE_COMMIT) {
1457 			err = open_commit(&commit, pack, packidx, idx,
1458 			    &qid->id, objcache);
1459 			if (err)
1460 				goto done;
1461 		} else {
1462 			err = got_error(GOT_ERR_OBJ_TYPE);
1463 			goto done;
1464 		}
1465 		got_object_close(obj);
1466 		obj = NULL;
1467 
1468 		err = got_privsep_send_enumerated_commit(ibuf, &qid->id,
1469 		    got_object_commit_get_committer_time(commit));
1470 		if (err)
1471 			goto done;
1472 
1473 		tree_id = got_object_commit_get_tree_id(commit);
1474 		idx = got_packidx_get_object_idx(packidx, tree_id);
1475 		if (idx == -1) {
1476 			have_all_entries = 0;
1477 			err = got_privsep_send_enumerated_tree(&totlen, ibuf,
1478 			    tree_id, "/", NULL, -1);
1479 			if (err)
1480 				goto done;
1481 			break;
1482 		}
1483 
1484 		if (got_object_idset_contains(idset, tree_id)) {
1485 			got_object_qid_free(qid);
1486 			qid = NULL;
1487 			err = send_tree_enumeration_done(ibuf);
1488 			if (err)
1489 				goto done;
1490 			continue;
1491 		}
1492 
1493 		err = enumerate_tree(&have_all_entries, ibuf, &totlen,
1494 		    tree_id, "/", pack, packidx, objcache, idset,
1495 		    &trees, &nalloc, &ntrees);
1496 		if (err)
1497 			goto done;
1498 
1499 		if (!have_all_entries)
1500 			break;
1501 
1502 		got_object_qid_free(qid);
1503 		qid = NULL;
1504 
1505 		parents = got_object_commit_get_parent_ids(commit);
1506 		if (parents) {
1507 			struct got_object_qid *pid;
1508 			STAILQ_FOREACH(pid, parents, entry) {
1509 				if (got_object_idset_contains(idset, &pid->id))
1510 					continue;
1511 				if (got_object_idset_contains(queued_ids, &pid->id))
1512 					continue;
1513 				err = got_object_qid_alloc_partial(&qid);
1514 				if (err)
1515 					goto done;
1516 				memcpy(&qid->id, &pid->id, sizeof(qid->id));
1517 				STAILQ_INSERT_TAIL(&commit_ids, qid, entry);
1518 				qid = NULL;
1519 			}
1520 		}
1521 
1522 		got_object_commit_close(commit);
1523 		commit = NULL;
1524 	}
1525 
1526 	if (have_all_entries) {
1527 		err = got_privsep_send_object_enumeration_done(ibuf);
1528 		if (err)
1529 			goto done;
1530 	} else {
1531 		err = got_privsep_send_object_enumeration_incomplete(ibuf);
1532 		if (err)
1533 			goto done;
1534 	}
1535 done:
1536 	if (obj)
1537 		got_object_close(obj);
1538 	if (commit)
1539 		got_object_commit_close(commit);
1540 	got_object_qid_free(qid);
1541 	got_object_id_queue_free(&commit_ids);
1542 	if (idset)
1543 		got_object_idset_free(idset);
1544 	if (queued_ids)
1545 		got_object_idset_free(queued_ids);
1546 	for (i = 0; i < ntrees; i++) {
1547 		struct enumerated_tree *tree = &trees[i];
1548 		free(tree->buf);
1549 		free(tree->path);
1550 		free(tree->entries);
1551 	}
1552 	free(trees);
1553 	return err;
1554 }
1555 
1556 enum findtwixt_color {
1557 	COLOR_KEEP = 0,
1558 	COLOR_DROP,
1559 	COLOR_SKIP,
1560 	COLOR_MAX,
1561 };
1562 
1563 static const struct got_error *
1564 paint_commit(struct got_object_qid *qid, intptr_t color)
1565 {
1566 	if (color < 0 || color >= COLOR_MAX)
1567 		return got_error(GOT_ERR_RANGE);
1568 
1569 	qid->data = (void *)color;
1570 	return NULL;
1571 }
1572 
1573 static const struct got_error *
1574 queue_commit_id(struct got_object_id_queue *ids, struct got_object_id *id,
1575     intptr_t color)
1576 {
1577 	const struct got_error *err;
1578 	struct got_object_qid *qid;
1579 
1580 	err = got_object_qid_alloc_partial(&qid);
1581 	if (err)
1582 		return err;
1583 
1584 	memcpy(&qid->id, id, sizeof(qid->id));
1585 	STAILQ_INSERT_TAIL(ids, qid, entry);
1586 	return paint_commit(qid, color);
1587 }
1588 
1589 static const struct got_error *
1590 paint_commits(struct got_object_id_queue *ids, int *nids,
1591     struct got_object_idset *keep, struct got_object_idset *drop,
1592     struct got_object_idset *skip, struct got_pack *pack,
1593     struct got_packidx *packidx, struct imsgbuf *ibuf,
1594     struct got_object_cache *objcache)
1595 {
1596 	const struct got_error *err = NULL;
1597 	struct got_commit_object *commit = NULL;
1598 	struct got_object_id_queue painted;
1599 	const struct got_object_id_queue *parents;
1600 	struct got_object_qid *qid = NULL;
1601 	int nqueued = *nids, nskip = 0, npainted = 0;
1602 
1603 	STAILQ_INIT(&painted);
1604 
1605 	while (!STAILQ_EMPTY(ids) && nskip != nqueued) {
1606 		int idx;
1607 		intptr_t color;
1608 
1609 		if (sigint_received) {
1610 			err = got_error(GOT_ERR_CANCELLED);
1611 			goto done;
1612 		}
1613 
1614 		qid = STAILQ_FIRST(ids);
1615 		idx = got_packidx_get_object_idx(packidx, &qid->id);
1616 		if (idx == -1) {
1617 			qid = NULL;
1618 			break;
1619 		}
1620 
1621 		STAILQ_REMOVE_HEAD(ids, entry);
1622 		nqueued--;
1623 		color = (intptr_t)qid->data;
1624 		if (color == COLOR_SKIP)
1625 			nskip--;
1626 
1627 		if (got_object_idset_contains(skip, &qid->id)) {
1628 			got_object_qid_free(qid);
1629 			qid = NULL;
1630 			continue;
1631 		}
1632 
1633 		switch (color) {
1634 		case COLOR_KEEP:
1635 			if (got_object_idset_contains(keep, &qid->id)) {
1636 				got_object_qid_free(qid);
1637 				qid = NULL;
1638 				continue;
1639 			}
1640 			if (got_object_idset_contains(drop, &qid->id)) {
1641 				err = paint_commit(qid, COLOR_SKIP);
1642 				if (err)
1643 					goto done;
1644 			}
1645 			err = got_object_idset_add(keep, &qid->id, NULL);
1646 			if (err)
1647 				goto done;
1648 			break;
1649 		case COLOR_DROP:
1650 			if (got_object_idset_contains(drop, &qid->id)) {
1651 				got_object_qid_free(qid);
1652 				qid = NULL;
1653 				continue;
1654 			}
1655 			if (got_object_idset_contains(keep, &qid->id)) {
1656 				err = paint_commit(qid, COLOR_SKIP);
1657 				if (err)
1658 					goto done;
1659 			}
1660 			err = got_object_idset_add(drop, &qid->id, NULL);
1661 			if (err)
1662 				goto done;
1663 			break;
1664 		case COLOR_SKIP:
1665 			if (!got_object_idset_contains(skip, &qid->id)) {
1666 				err = got_object_idset_add(skip, &qid->id,
1667 				    NULL);
1668 				if (err)
1669 					goto done;
1670 			}
1671 			break;
1672 		default:
1673 			/* should not happen */
1674 			err = got_error_fmt(GOT_ERR_NOT_IMPL,
1675 			    "%s invalid commit color %"PRIdPTR, __func__,
1676 			    color);
1677 			goto done;
1678 		}
1679 
1680 		err = open_commit(&commit, pack, packidx, idx, &qid->id,
1681 		    objcache);
1682 		if (err)
1683 			goto done;
1684 
1685 		parents = got_object_commit_get_parent_ids(commit);
1686 		if (parents) {
1687 			struct got_object_qid *pid;
1688 			color = (intptr_t)qid->data;
1689 			STAILQ_FOREACH(pid, parents, entry) {
1690 				err = queue_commit_id(ids, &pid->id, color);
1691 				if (err)
1692 					goto done;
1693 				nqueued++;
1694 				if (color == COLOR_SKIP)
1695 					nskip++;
1696 			}
1697 		}
1698 
1699 		got_object_commit_close(commit);
1700 		commit = NULL;
1701 
1702 		STAILQ_INSERT_TAIL(&painted, qid, entry);
1703 		qid = NULL;
1704 		npainted++;
1705 
1706 		err = got_privsep_send_painted_commits(ibuf, &painted,
1707 		    &npainted, 1, 0);
1708 		if (err)
1709 			goto done;
1710 	}
1711 
1712 	err = got_privsep_send_painted_commits(ibuf, &painted, &npainted, 1, 1);
1713 	if (err)
1714 		goto done;
1715 
1716 	*nids = nqueued;
1717 done:
1718 	if (commit)
1719 		got_object_commit_close(commit);
1720 	got_object_qid_free(qid);
1721 	return err;
1722 }
1723 
1724 static void
1725 commit_painting_free(struct got_object_idset **keep,
1726     struct got_object_idset **drop,
1727     struct got_object_idset **skip)
1728 {
1729 	if (*keep) {
1730 		got_object_idset_free(*keep);
1731 		*keep = NULL;
1732 	}
1733 	if (*drop) {
1734 		got_object_idset_free(*drop);
1735 		*drop = NULL;
1736 	}
1737 	if (*skip) {
1738 		got_object_idset_free(*skip);
1739 		*skip = NULL;
1740 	}
1741 }
1742 
1743 static const struct got_error *
1744 commit_painting_init(struct imsgbuf *ibuf, struct got_object_idset **keep,
1745     struct got_object_idset **drop, struct got_object_idset **skip)
1746 {
1747 	const struct got_error *err = NULL;
1748 
1749 	*keep = got_object_idset_alloc();
1750 	if (*keep == NULL) {
1751 		err = got_error_from_errno("got_object_idset_alloc");
1752 		goto done;
1753 	}
1754 	*drop = got_object_idset_alloc();
1755 	if (*drop == NULL) {
1756 		err = got_error_from_errno("got_object_idset_alloc");
1757 		goto done;
1758 	}
1759 	*skip = got_object_idset_alloc();
1760 	if (*skip == NULL) {
1761 		err = got_error_from_errno("got_object_idset_alloc");
1762 		goto done;
1763 	}
1764 
1765 	err = recv_object_ids(*keep, ibuf);
1766 	if (err)
1767 		goto done;
1768 	err = recv_object_ids(*drop, ibuf);
1769 	if (err)
1770 		goto done;
1771 	err = recv_object_ids(*skip, ibuf);
1772 	if (err)
1773 		goto done;
1774 
1775 done:
1776 	if (err)
1777 		commit_painting_free(keep, drop, skip);
1778 
1779 	return err;
1780 }
1781 
1782 static const struct got_error *
1783 commit_painting_request(struct imsg *imsg, struct imsgbuf *ibuf,
1784     struct got_pack *pack, struct got_packidx *packidx,
1785     struct got_object_cache *objcache, struct got_object_idset *keep,
1786     struct got_object_idset *drop, struct got_object_idset *skip)
1787 {
1788 	const struct got_error *err = NULL;
1789 	struct got_imsg_commit_painting_request ireq;
1790 	struct got_object_id id;
1791 	size_t datalen;
1792 	struct got_object_id_queue ids;
1793 	int nids = 0;
1794 
1795 	STAILQ_INIT(&ids);
1796 
1797 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1798 	if (datalen != sizeof(ireq))
1799 		return got_error(GOT_ERR_PRIVSEP_LEN);
1800 	memcpy(&ireq, imsg->data, sizeof(ireq));
1801 	memcpy(&id, &ireq.id, sizeof(id));
1802 
1803 	err = queue_commit_id(&ids, &id, ireq.color);
1804 	if (err)
1805 		return err;
1806 	nids = 1;
1807 
1808 	err = paint_commits(&ids, &nids, keep, drop, skip,
1809 	    pack, packidx, ibuf, objcache);
1810 	if (err)
1811 		goto done;
1812 
1813 	err = got_privsep_send_painted_commits(ibuf, &ids, &nids, 0, 1);
1814 	if (err)
1815 		goto done;
1816 
1817 	err = got_privsep_send_painting_commits_done(ibuf);
1818 done:
1819 	got_object_id_queue_free(&ids);
1820 	return err;
1821 }
1822 
1823 static const struct got_error *
1824 receive_pack(struct got_pack **packp, struct imsgbuf *ibuf)
1825 {
1826 	const struct got_error *err = NULL;
1827 	struct imsg imsg;
1828 	struct got_imsg_pack ipack;
1829 	size_t datalen;
1830 	struct got_pack *pack;
1831 
1832 	*packp = NULL;
1833 
1834 	err = got_privsep_recv_imsg(&imsg, ibuf, 0);
1835 	if (err)
1836 		return err;
1837 
1838 	pack = calloc(1, sizeof(*pack));
1839 	if (pack == NULL) {
1840 		err = got_error_from_errno("calloc");
1841 		goto done;
1842 	}
1843 
1844 	if (imsg.hdr.type != GOT_IMSG_PACK) {
1845 		err = got_error(GOT_ERR_PRIVSEP_MSG);
1846 		goto done;
1847 	}
1848 
1849 	if (imsg.fd == -1) {
1850 		err = got_error(GOT_ERR_PRIVSEP_NO_FD);
1851 		goto done;
1852 	}
1853 
1854 	datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1855 	if (datalen != sizeof(ipack)) {
1856 		err = got_error(GOT_ERR_PRIVSEP_LEN);
1857 		goto done;
1858 	}
1859 	memcpy(&ipack, imsg.data, sizeof(ipack));
1860 
1861 	pack->filesize = ipack.filesize;
1862 	pack->fd = dup(imsg.fd);
1863 	if (pack->fd == -1) {
1864 		err = got_error_from_errno("dup");
1865 		goto done;
1866 	}
1867 	if (lseek(pack->fd, 0, SEEK_SET) == -1) {
1868 		err = got_error_from_errno("lseek");
1869 		goto done;
1870 	}
1871 	pack->path_packfile = strdup(ipack.path_packfile);
1872 	if (pack->path_packfile == NULL) {
1873 		err = got_error_from_errno("strdup");
1874 		goto done;
1875 	}
1876 
1877 	err = got_delta_cache_alloc(&pack->delta_cache);
1878 	if (err)
1879 		goto done;
1880 
1881 #ifndef GOT_PACK_NO_MMAP
1882 	if (pack->filesize > 0 && pack->filesize <= SIZE_MAX) {
1883 		pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1884 		    pack->fd, 0);
1885 		if (pack->map == MAP_FAILED)
1886 			pack->map = NULL; /* fall back to read(2) */
1887 	}
1888 #endif
1889 done:
1890 	if (err) {
1891 		if (imsg.fd != -1)
1892 			close(imsg.fd);
1893 		free(pack);
1894 	} else
1895 		*packp = pack;
1896 	imsg_free(&imsg);
1897 	return err;
1898 }
1899 
1900 int
1901 main(int argc, char *argv[])
1902 {
1903 	const struct got_error *err = NULL;
1904 	struct imsgbuf ibuf;
1905 	struct imsg imsg;
1906 	struct got_packidx *packidx = NULL;
1907 	struct got_pack *pack = NULL;
1908 	struct got_object_cache objcache;
1909 	FILE *basefile = NULL, *accumfile = NULL, *delta_outfile = NULL;
1910 	struct got_object_idset *keep = NULL, *drop = NULL, *skip = NULL;
1911 	struct got_parsed_tree_entry *entries = NULL;
1912 	size_t nentries = 0, nentries_alloc = 0;
1913 
1914 	//static int attached;
1915 	//while (!attached) sleep(1);
1916 
1917 	signal(SIGINT, catch_sigint);
1918 
1919 	imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
1920 
1921 	err = got_object_cache_init(&objcache, GOT_OBJECT_CACHE_TYPE_OBJ);
1922 	if (err) {
1923 		err = got_error_from_errno("got_object_cache_init");
1924 		got_privsep_send_error(&ibuf, err);
1925 		return 1;
1926 	}
1927 
1928 #ifndef PROFILE
1929 	/* revoke access to most system calls */
1930 	if (pledge("stdio recvfd", NULL) == -1) {
1931 		err = got_error_from_errno("pledge");
1932 		got_privsep_send_error(&ibuf, err);
1933 		return 1;
1934 	}
1935 #endif
1936 
1937 	err = receive_packidx(&packidx, &ibuf);
1938 	if (err) {
1939 		got_privsep_send_error(&ibuf, err);
1940 		return 1;
1941 	}
1942 
1943 	err = receive_pack(&pack, &ibuf);
1944 	if (err) {
1945 		got_privsep_send_error(&ibuf, err);
1946 		return 1;
1947 	}
1948 
1949 	for (;;) {
1950 		imsg.fd = -1;
1951 
1952 		if (sigint_received) {
1953 			err = got_error(GOT_ERR_CANCELLED);
1954 			break;
1955 		}
1956 
1957 		err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
1958 		if (err) {
1959 			if (err->code == GOT_ERR_PRIVSEP_PIPE)
1960 				err = NULL;
1961 			break;
1962 		}
1963 
1964 		if (imsg.hdr.type == GOT_IMSG_STOP)
1965 			break;
1966 
1967 		switch (imsg.hdr.type) {
1968 		case GOT_IMSG_TMPFD:
1969 			if (basefile == NULL) {
1970 				err = receive_tempfile(&basefile, "w+",
1971 				   &imsg, &ibuf);
1972 			} else if (accumfile == NULL) {
1973 				err = receive_tempfile(&accumfile, "w+",
1974 				   &imsg, &ibuf);
1975 			} else
1976 				err = got_error(GOT_ERR_PRIVSEP_MSG);
1977 			break;
1978 		case GOT_IMSG_PACKED_OBJECT_REQUEST:
1979 			err = object_request(&imsg, &ibuf, pack, packidx,
1980 			    &objcache);
1981 			break;
1982 		case GOT_IMSG_PACKED_RAW_OBJECT_REQUEST:
1983 			if (basefile == NULL || accumfile == NULL) {
1984 				err = got_error(GOT_ERR_PRIVSEP_MSG);
1985 				break;
1986 			}
1987 			err = raw_object_request(&imsg, &ibuf, pack, packidx,
1988 			    &objcache, basefile, accumfile);
1989 			break;
1990 		case GOT_IMSG_RAW_DELTA_OUTFD:
1991 			if (delta_outfile != NULL) {
1992 				err = got_error(GOT_ERR_PRIVSEP_MSG);
1993 				break;
1994 			}
1995 			err = receive_tempfile(&delta_outfile, "w",
1996 			    &imsg, &ibuf);
1997 			break;
1998 		case GOT_IMSG_RAW_DELTA_REQUEST:
1999 			if (delta_outfile == NULL) {
2000 				err = got_error(GOT_ERR_PRIVSEP_NO_FD);
2001 				break;
2002 			}
2003 			err = raw_delta_request(&imsg, &ibuf, delta_outfile,
2004 			    pack, packidx);
2005 			break;
2006 		case GOT_IMSG_DELTA_REUSE_REQUEST:
2007 			err = delta_reuse_request(&imsg, &ibuf, pack, packidx);
2008 			break;
2009 		case GOT_IMSG_COMMIT_REQUEST:
2010 			err = commit_request(&imsg, &ibuf, pack, packidx,
2011 			    &objcache);
2012 			break;
2013 		case GOT_IMSG_TREE_REQUEST:
2014 			err = tree_request(&imsg, &ibuf, pack, packidx,
2015 			    &objcache, &entries, &nentries, &nentries_alloc);
2016 			break;
2017 		case GOT_IMSG_BLOB_REQUEST:
2018 			if (basefile == NULL || accumfile == NULL) {
2019 				err = got_error(GOT_ERR_PRIVSEP_MSG);
2020 				break;
2021 			}
2022 			err = blob_request(&imsg, &ibuf, pack, packidx,
2023 			    &objcache, basefile, accumfile);
2024 			break;
2025 		case GOT_IMSG_TAG_REQUEST:
2026 			err = tag_request(&imsg, &ibuf, pack, packidx,
2027 			    &objcache);
2028 			break;
2029 		case GOT_IMSG_COMMIT_TRAVERSAL_REQUEST:
2030 			err = commit_traversal_request(&imsg, &ibuf, pack,
2031 			    packidx, &objcache);
2032 			break;
2033 		case GOT_IMSG_OBJECT_ENUMERATION_REQUEST:
2034 			err = enumeration_request(&imsg, &ibuf, pack,
2035 			    packidx, &objcache);
2036 			break;
2037 		case GOT_IMSG_COMMIT_PAINTING_INIT:
2038 			commit_painting_free(&keep, &drop, &skip);
2039 			err = commit_painting_init(&ibuf, &keep, &drop, &skip);
2040 			break;
2041 		case GOT_IMSG_COMMIT_PAINTING_REQUEST:
2042 			if (keep == NULL || drop == NULL || skip == NULL) {
2043 				err = got_error(GOT_ERR_PRIVSEP_MSG);
2044 				break;
2045 			}
2046 			err = commit_painting_request(&imsg, &ibuf, pack,
2047 			    packidx, &objcache, keep, drop, skip);
2048 			break;
2049 		case GOT_IMSG_COMMIT_PAINTING_DONE:
2050 			commit_painting_free(&keep, &drop, &skip);
2051 			break;
2052 		default:
2053 			err = got_error(GOT_ERR_PRIVSEP_MSG);
2054 			break;
2055 		}
2056 
2057 		if (imsg.fd != -1 && close(imsg.fd) == -1 && err == NULL)
2058 			err = got_error_from_errno("close");
2059 		imsg_free(&imsg);
2060 		if (err)
2061 			break;
2062 	}
2063 
2064 	free(entries);
2065 	commit_painting_free(&keep, &drop, &skip);
2066 	if (packidx)
2067 		got_packidx_close(packidx);
2068 	if (pack)
2069 		got_pack_close(pack);
2070 	got_object_cache_close(&objcache);
2071 	imsg_clear(&ibuf);
2072 	if (basefile && fclose(basefile) == EOF && err == NULL)
2073 		err = got_error_from_errno("fclose");
2074 	if (accumfile && fclose(accumfile) == EOF && err == NULL)
2075 		err = got_error_from_errno("fclose");
2076 	if (delta_outfile && fclose(delta_outfile) == EOF && err == NULL)
2077 		err = got_error_from_errno("fclose");
2078 	if (err) {
2079 		if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
2080 			fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
2081 			got_privsep_send_error(&ibuf, err);
2082 		}
2083 	}
2084 	if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
2085 		err = got_error_from_errno("close");
2086 	return err ? 1 : 0;
2087 }