op public repos

Blob

Date:: Tue Jun 7 19:20:01 2022 UTC
Message:: revert object enumeration in got-read-pack for now; needs more work This implementation marked commits and trees as enumerated before all trees which they depend on were enumerated. This behaviour leads to incomplete pack files when a tree is only partially packed and got-read-pack hits a missing tree entry as a result. The algorithm must be reworked such that packed leave nodes are marked enumerated first, then bubble-up. Found by op@
Actions:: History | Blame | Raw File
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/types.h>
18 #include <sys/queue.h>
19 #include <sys/uio.h>
20 #include <sys/time.h>
21 #include <sys/mman.h>
22 
23 #include <limits.h>
24 #include <signal.h>
25 #include <stdint.h>
26 #include <imsg.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <sha1.h>
31 #include <unistd.h>
32 #include <zlib.h>
33 
34 #include "got_error.h"
35 #include "got_object.h"
36 #include "got_path.h"
37 
38 #include "got_lib_delta.h"
39 #include "got_lib_delta_cache.h"
40 #include "got_lib_object.h"
41 #include "got_lib_object_cache.h"
42 #include "got_lib_object_parse.h"
43 #include "got_lib_object_idset.h"
44 #include "got_lib_privsep.h"
45 #include "got_lib_pack.h"
46 
47 static volatile sig_atomic_t sigint_received;
48 
49 static void
50 catch_sigint(int signo)
51 {
52 	sigint_received = 1;
53 }
54 
55 static const struct got_error *
56 open_object(struct got_object **obj, struct got_pack *pack,
57     struct got_packidx *packidx, int idx, struct got_object_id *id,
58     struct got_object_cache *objcache)
59 {
60 	const struct got_error *err;
61 
62 	err = got_packfile_open_object(obj, pack, packidx, idx, id);
63 	if (err)
64 		return err;
65 	(*obj)->refcnt++;
66 
67 	err = got_object_cache_add(objcache, id, *obj);
68 	if (err) {
69 		if (err->code == GOT_ERR_OBJ_EXISTS ||
70 		    err->code == GOT_ERR_OBJ_TOO_LARGE)
71 			err = NULL;
72 		return err;
73 	}
74 	(*obj)->refcnt++;
75 	return NULL;
76 }
77 
78 static const struct got_error *
79 object_request(struct imsg *imsg, struct imsgbuf *ibuf, struct got_pack *pack,
80     struct got_packidx *packidx, struct got_object_cache *objcache)
81 {
82 	const struct got_error *err = NULL;
83 	struct got_imsg_packed_object iobj;
84 	struct got_object *obj;
85 	struct got_object_id id;
86 	size_t datalen;
87 
88 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
89 	if (datalen != sizeof(iobj))
90 		return got_error(GOT_ERR_PRIVSEP_LEN);
91 	memcpy(&iobj, imsg->data, sizeof(iobj));
92 	memcpy(id.sha1, iobj.id, SHA1_DIGEST_LENGTH);
93 
94 	obj = got_object_cache_get(objcache, &id);
95 	if (obj) {
96 		obj->refcnt++;
97 	} else {
98 		err = open_object(&obj, pack, packidx, iobj.idx, &id,
99 		    objcache);
100 		if (err)
101 			goto done;
102 	}
103 
104 	err = got_privsep_send_obj(ibuf, obj);
105 done:
106 	got_object_close(obj);
107 	return err;
108 }
109 
110 static const struct got_error *
111 open_commit(struct got_commit_object **commit, struct got_pack *pack,
112     struct got_packidx *packidx, int obj_idx, struct got_object_id *id,
113     struct got_object_cache *objcache)
114 {
115 	const struct got_error *err = NULL;
116 	struct got_object *obj = NULL;
117 	uint8_t *buf = NULL;
118 	size_t len;
119 
120 	*commit = NULL;
121 
122 	obj = got_object_cache_get(objcache, id);
123 	if (obj) {
124 		obj->refcnt++;
125 	} else {
126 		err = open_object(&obj, pack, packidx, obj_idx, id,
127 		    objcache);
128 		if (err)
129 			return err;
130 	}
131 
132 	err = got_packfile_extract_object_to_mem(&buf, &len, obj, pack);
133 	if (err)
134 		goto done;
135 
136 	obj->size = len;
137 
138 	err = got_object_parse_commit(commit, buf, len);
139 done:
140 	got_object_close(obj);
141 	free(buf);
142 	return err;
143 }
144 
145 static const struct got_error *
146 commit_request(struct imsg *imsg, struct imsgbuf *ibuf, struct got_pack *pack,
147     struct got_packidx *packidx, struct got_object_cache *objcache)
148 {
149 	const struct got_error *err = NULL;
150 	struct got_imsg_packed_object iobj;
151 	struct got_commit_object *commit = NULL;
152 	struct got_object_id id;
153 	size_t datalen;
154 
155 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
156 	if (datalen != sizeof(iobj))
157 		return got_error(GOT_ERR_PRIVSEP_LEN);
158 	memcpy(&iobj, imsg->data, sizeof(iobj));
159 	memcpy(id.sha1, iobj.id, SHA1_DIGEST_LENGTH);
160 
161 	err = open_commit(&commit, pack, packidx, iobj.idx, &id, objcache);
162 	if (err)
163 		goto done;
164 
165 	err = got_privsep_send_commit(ibuf, commit);
166 done:
167 	if (commit)
168 		got_object_commit_close(commit);
169 	if (err) {
170 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
171 			err = NULL;
172 		else
173 			got_privsep_send_error(ibuf, err);
174 	}
175 
176 	return err;
177 }
178 
179 static const struct got_error *
180 open_tree(uint8_t **buf, struct got_parsed_tree_entry **entries, int *nentries,
181     struct got_pack *pack, struct got_packidx *packidx, int obj_idx,
182     struct got_object_id *id, struct got_object_cache *objcache)
183 {
184 	const struct got_error *err = NULL;
185 	struct got_object *obj = NULL;
186 	size_t len;
187 
188 	*buf = NULL;
189 	*nentries = 0;
190 
191 	obj = got_object_cache_get(objcache, id);
192 	if (obj) {
193 		obj->refcnt++;
194 	} else {
195 		err = open_object(&obj, pack, packidx, obj_idx, id,
196 		    objcache);
197 		if (err)
198 			return err;
199 	}
200 
201 	err = got_packfile_extract_object_to_mem(buf, &len, obj, pack);
202 	if (err)
203 		goto done;
204 
205 	obj->size = len;
206 
207 	err = got_object_parse_tree(entries, nentries, *buf, len);
208 done:
209 	got_object_close(obj);
210 	if (err) {
211 		free(*buf);
212 		*buf = NULL;
213 	}
214 	return err;
215 }
216 
217 static const struct got_error *
218 tree_request(struct imsg *imsg, struct imsgbuf *ibuf, struct got_pack *pack,
219     struct got_packidx *packidx, struct got_object_cache *objcache)
220 {
221 	const struct got_error *err = NULL;
222 	struct got_imsg_packed_object iobj;
223 	struct got_parsed_tree_entry *entries = NULL;
224 	int nentries = 0;
225 	uint8_t *buf = NULL;
226 	struct got_object_id id;
227 	size_t datalen;
228 
229 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
230 	if (datalen != sizeof(iobj))
231 		return got_error(GOT_ERR_PRIVSEP_LEN);
232 	memcpy(&iobj, imsg->data, sizeof(iobj));
233 	memcpy(id.sha1, iobj.id, SHA1_DIGEST_LENGTH);
234 
235 	err = open_tree(&buf, &entries, &nentries, pack, packidx, iobj.idx,
236 	    &id, objcache);
237 	if (err)
238 		return err;
239 
240 	err = got_privsep_send_tree(ibuf, entries, nentries);
241 	free(entries);
242 	free(buf);
243 	if (err) {
244 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
245 			err = NULL;
246 		else
247 			got_privsep_send_error(ibuf, err);
248 	}
249 
250 	return err;
251 }
252 
253 static const struct got_error *
254 receive_file(FILE **f, struct imsgbuf *ibuf, uint32_t imsg_code)
255 {
256 	const struct got_error *err;
257 	struct imsg imsg;
258 	size_t datalen;
259 
260 	err = got_privsep_recv_imsg(&imsg, ibuf, 0);
261 	if (err)
262 		return err;
263 
264 	if (imsg.hdr.type != imsg_code) {
265 		err = got_error(GOT_ERR_PRIVSEP_MSG);
266 		goto done;
267 	}
268 
269 	datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
270 	if (datalen != 0) {
271 		err = got_error(GOT_ERR_PRIVSEP_LEN);
272 		goto done;
273 	}
274 	if (imsg.fd == -1) {
275 		err = got_error(GOT_ERR_PRIVSEP_NO_FD);
276 		goto done;
277 	}
278 
279 	*f = fdopen(imsg.fd, "w+");
280 	if (*f == NULL) {
281 		err = got_error_from_errno("fdopen");
282 		close(imsg.fd);
283 		goto done;
284 	}
285 done:
286 	imsg_free(&imsg);
287 	return err;
288 }
289 
290 static const struct got_error *
291 receive_tempfile(FILE **f, const char *mode, struct imsg *imsg,
292     struct imsgbuf *ibuf)
293 {
294 	size_t datalen;
295 
296 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
297 	if (datalen != 0)
298 		return got_error(GOT_ERR_PRIVSEP_LEN);
299 
300 	if (imsg->fd == -1)
301 		return got_error(GOT_ERR_PRIVSEP_NO_FD);
302 
303 	*f = fdopen(imsg->fd, mode);
304 	if (*f == NULL)
305 		return got_error_from_errno("fdopen");
306 	imsg->fd = -1;
307 
308 	return NULL;
309 }
310 
311 static const struct got_error *
312 blob_request(struct imsg *imsg, struct imsgbuf *ibuf, struct got_pack *pack,
313     struct got_packidx *packidx, struct got_object_cache *objcache,
314     FILE *basefile, FILE *accumfile)
315 {
316 	const struct got_error *err = NULL;
317 	struct got_imsg_packed_object iobj;
318 	struct got_object *obj = NULL;
319 	FILE *outfile = NULL;
320 	struct got_object_id id;
321 	size_t datalen;
322 	uint64_t blob_size;
323 	uint8_t *buf = NULL;
324 
325 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
326 	if (datalen != sizeof(iobj))
327 		return got_error(GOT_ERR_PRIVSEP_LEN);
328 	memcpy(&iobj, imsg->data, sizeof(iobj));
329 	memcpy(id.sha1, iobj.id, SHA1_DIGEST_LENGTH);
330 
331 	obj = got_object_cache_get(objcache, &id);
332 	if (obj) {
333 		obj->refcnt++;
334 	} else {
335 		err = open_object(&obj, pack, packidx, iobj.idx, &id,
336 		    objcache);
337 		if (err)
338 			return err;
339 	}
340 
341 	err = receive_file(&outfile, ibuf, GOT_IMSG_BLOB_OUTFD);
342 	if (err)
343 		goto done;
344 
345 	if (obj->flags & GOT_OBJ_FLAG_DELTIFIED) {
346 		err = got_pack_get_max_delta_object_size(&blob_size, obj, pack);
347 		if (err)
348 			goto done;
349 	} else
350 		blob_size = obj->size;
351 
352 	if (blob_size <= GOT_PRIVSEP_INLINE_BLOB_DATA_MAX)
353 		err = got_packfile_extract_object_to_mem(&buf, &obj->size,
354 		    obj, pack);
355 	else
356 		err = got_packfile_extract_object(pack, obj, outfile, basefile,
357 		    accumfile);
358 	if (err)
359 		goto done;
360 
361 	err = got_privsep_send_blob(ibuf, obj->size, obj->hdrlen, buf);
362 done:
363 	free(buf);
364 	if (outfile && fclose(outfile) == EOF && err == NULL)
365 		err = got_error_from_errno("fclose");
366 	got_object_close(obj);
367 	if (err && err->code != GOT_ERR_PRIVSEP_PIPE)
368 		got_privsep_send_error(ibuf, err);
369 
370 	return err;
371 }
372 
373 static const struct got_error *
374 tag_request(struct imsg *imsg, struct imsgbuf *ibuf, struct got_pack *pack,
375     struct got_packidx *packidx, struct got_object_cache *objcache)
376 {
377 	const struct got_error *err = NULL;
378 	struct got_imsg_packed_object iobj;
379 	struct got_object *obj = NULL;
380 	struct got_tag_object *tag = NULL;
381 	uint8_t *buf = NULL;
382 	size_t len;
383 	struct got_object_id id;
384 	size_t datalen;
385 
386 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
387 	if (datalen != sizeof(iobj))
388 		return got_error(GOT_ERR_PRIVSEP_LEN);
389 	memcpy(&iobj, imsg->data, sizeof(iobj));
390 	memcpy(id.sha1, iobj.id, SHA1_DIGEST_LENGTH);
391 
392 	obj = got_object_cache_get(objcache, &id);
393 	if (obj) {
394 		obj->refcnt++;
395 	} else {
396 		err = open_object(&obj, pack, packidx, iobj.idx, &id,
397 		    objcache);
398 		if (err)
399 			return err;
400 	}
401 
402 	err = got_packfile_extract_object_to_mem(&buf, &len, obj, pack);
403 	if (err)
404 		goto done;
405 
406 	obj->size = len;
407 	err = got_object_parse_tag(&tag, buf, len);
408 	if (err)
409 		goto done;
410 
411 	err = got_privsep_send_tag(ibuf, tag);
412 done:
413 	free(buf);
414 	got_object_close(obj);
415 	if (tag)
416 		got_object_tag_close(tag);
417 	if (err) {
418 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
419 			err = NULL;
420 		else
421 			got_privsep_send_error(ibuf, err);
422 	}
423 
424 	return err;
425 }
426 
427 static struct got_parsed_tree_entry *
428 find_entry_by_name(struct got_parsed_tree_entry *entries, int nentries,
429     const char *name, size_t len)
430 {
431 	struct got_parsed_tree_entry *pte;
432 	int cmp, i;
433 
434 	/* Note that tree entries are sorted in strncmp() order. */
435 	for (i = 0; i < nentries; i++) {
436 		pte = &entries[i];
437 		cmp = strncmp(pte->name, name, len);
438 		if (cmp < 0)
439 			continue;
440 		if (cmp > 0)
441 			break;
442 		if (pte->name[len] == '\0')
443 			return pte;
444 	}
445 	return NULL;
446 }
447 
448 static const struct got_error *
449 tree_path_changed(int *changed, uint8_t **buf1, uint8_t **buf2,
450     struct got_parsed_tree_entry **entries1, int *nentries1,
451     struct got_parsed_tree_entry **entries2, int *nentries2,
452     const char *path, struct got_pack *pack, struct got_packidx *packidx,
453     struct imsgbuf *ibuf, struct got_object_cache *objcache)
454 {
455 	const struct got_error *err = NULL;
456 	struct got_parsed_tree_entry *pte1 = NULL, *pte2 = NULL;
457 	const char *seg, *s;
458 	size_t seglen;
459 
460 	*changed = 0;
461 
462 	/* We not do support comparing the root path. */
463 	if (got_path_is_root_dir(path))
464 		return got_error_path(path, GOT_ERR_BAD_PATH);
465 
466 	s = path;
467 	while (*s == '/')
468 		s++;
469 	seg = s;
470 	seglen = 0;
471 	while (*s) {
472 		if (*s != '/') {
473 			s++;
474 			seglen++;
475 			if (*s)
476 				continue;
477 		}
478 
479 		pte1 = find_entry_by_name(*entries1, *nentries1, seg, seglen);
480 		if (pte1 == NULL) {
481 			err = got_error(GOT_ERR_NO_OBJ);
482 			break;
483 		}
484 
485 		pte2 = find_entry_by_name(*entries2, *nentries2, seg, seglen);
486 		if (pte2 == NULL) {
487 			*changed = 1;
488 			break;
489 		}
490 
491 		if (pte1->mode != pte2->mode) {
492 			*changed = 1;
493 			break;
494 		}
495 
496 		if (memcmp(pte1->id, pte2->id, SHA1_DIGEST_LENGTH) == 0) {
497 			*changed = 0;
498 			break;
499 		}
500 
501 		if (*s == '\0') { /* final path element */
502 			*changed = 1;
503 			break;
504 		}
505 
506 		seg = s + 1;
507 		s++;
508 		seglen = 0;
509 		if (*s) {
510 			struct got_object_id id1, id2;
511 			int idx;
512 
513 			memcpy(id1.sha1, pte1->id, SHA1_DIGEST_LENGTH);
514 			idx = got_packidx_get_object_idx(packidx, &id1);
515 			if (idx == -1) {
516 				err = got_error_no_obj(&id1);
517 				break;
518 			}
519 			free(*entries1);
520 			*nentries1 = 0;
521 			free(*buf1);
522 			*buf1 = NULL;
523 			err = open_tree(buf1, entries1, nentries1, pack,
524 			    packidx, idx, &id1, objcache);
525 			pte1 = NULL;
526 			if (err)
527 				break;
528 
529 			memcpy(id2.sha1, pte2->id, SHA1_DIGEST_LENGTH);
530 			idx = got_packidx_get_object_idx(packidx, &id2);
531 			if (idx == -1) {
532 				err = got_error_no_obj(&id2);
533 				break;
534 			}
535 			free(*entries2);
536 			*nentries2 = 0;
537 			free(*buf2);
538 			*buf2 = NULL;
539 			err = open_tree(buf2, entries2, nentries2, pack,
540 			    packidx, idx, &id2, objcache);
541 			pte2 = NULL;
542 			if (err)
543 				break;
544 		}
545 	}
546 
547 	return err;
548 }
549 
550 static const struct got_error *
551 send_traversed_commits(struct got_object_id *commit_ids, size_t ncommits,
552     struct imsgbuf *ibuf)
553 {
554 	struct ibuf *wbuf;
555 	size_t i;
556 
557 	wbuf = imsg_create(ibuf, GOT_IMSG_TRAVERSED_COMMITS, 0, 0,
558 	    sizeof(struct got_imsg_traversed_commits) +
559 	    ncommits * SHA1_DIGEST_LENGTH);
560 	if (wbuf == NULL)
561 		return got_error_from_errno("imsg_create TRAVERSED_COMMITS");
562 
563 	if (imsg_add(wbuf, &ncommits, sizeof(ncommits)) == -1)
564 		return got_error_from_errno("imsg_add TRAVERSED_COMMITS");
565 
566 	for (i = 0; i < ncommits; i++) {
567 		struct got_object_id *id = &commit_ids[i];
568 		if (imsg_add(wbuf, id->sha1, SHA1_DIGEST_LENGTH) == -1) {
569 			return got_error_from_errno(
570 			    "imsg_add TRAVERSED_COMMITS");
571 		}
572 	}
573 
574 	wbuf->fd = -1;
575 	imsg_close(ibuf, wbuf);
576 
577 	return got_privsep_flush_imsg(ibuf);
578 }
579 
580 static const struct got_error *
581 send_commit_traversal_done(struct imsgbuf *ibuf)
582 {
583 	if (imsg_compose(ibuf, GOT_IMSG_COMMIT_TRAVERSAL_DONE, 0, 0, -1,
584 	    NULL, 0) == -1)
585 		return got_error_from_errno("imsg_compose TRAVERSAL_DONE");
586 
587 	return got_privsep_flush_imsg(ibuf);
588 }
589 
590 
591 static const struct got_error *
592 commit_traversal_request(struct imsg *imsg, struct imsgbuf *ibuf,
593     struct got_pack *pack, struct got_packidx *packidx,
594     struct got_object_cache *objcache)
595 {
596 	const struct got_error *err = NULL;
597 	struct got_imsg_packed_object iobj;
598 	struct got_object_qid *pid;
599 	struct got_commit_object *commit = NULL, *pcommit = NULL;
600 	struct got_parsed_tree_entry *entries = NULL, *pentries = NULL;
601 	int nentries = 0, pnentries = 0;
602 	struct got_object_id id;
603 	size_t datalen, path_len;
604 	char *path = NULL;
605 	const int min_alloc = 64;
606 	int changed = 0, ncommits = 0, nallocated = 0;
607 	struct got_object_id *commit_ids = NULL;
608 
609 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
610 	if (datalen < sizeof(iobj))
611 		return got_error(GOT_ERR_PRIVSEP_LEN);
612 	memcpy(&iobj, imsg->data, sizeof(iobj));
613 	memcpy(id.sha1, iobj.id, SHA1_DIGEST_LENGTH);
614 
615 	path_len = datalen - sizeof(iobj) - 1;
616 	if (path_len < 0)
617 		return got_error(GOT_ERR_PRIVSEP_LEN);
618 	if (path_len > 0) {
619 		path = imsg->data + sizeof(iobj);
620 		if (path[path_len] != '\0')
621 			return got_error(GOT_ERR_PRIVSEP_LEN);
622 	}
623 
624 	nallocated = min_alloc;
625 	commit_ids = reallocarray(NULL, nallocated, sizeof(*commit_ids));
626 	if (commit_ids == NULL)
627 		return got_error_from_errno("reallocarray");
628 
629 	do {
630 		const size_t max_datalen = MAX_IMSGSIZE - IMSG_HEADER_SIZE;
631 		int idx;
632 
633 		if (sigint_received) {
634 			err = got_error(GOT_ERR_CANCELLED);
635 			goto done;
636 		}
637 
638 		if (commit == NULL) {
639 			idx = got_packidx_get_object_idx(packidx, &id);
640 			if (idx == -1)
641 				break;
642 			err = open_commit(&commit, pack, packidx,
643 			    idx, &id, objcache);
644 			if (err) {
645 				if (err->code != GOT_ERR_NO_OBJ)
646 					goto done;
647 				err = NULL;
648 				break;
649 			}
650 		}
651 
652 		if (sizeof(struct got_imsg_traversed_commits) +
653 		    ncommits * SHA1_DIGEST_LENGTH >= max_datalen) {
654 			err = send_traversed_commits(commit_ids, ncommits,
655 			    ibuf);
656 			if (err)
657 				goto done;
658 			ncommits = 0;
659 		}
660 		ncommits++;
661 		if (ncommits > nallocated) {
662 			struct got_object_id *new;
663 			nallocated += min_alloc;
664 			new = reallocarray(commit_ids, nallocated,
665 			    sizeof(*commit_ids));
666 			if (new == NULL) {
667 				err = got_error_from_errno("reallocarray");
668 				goto done;
669 			}
670 			commit_ids = new;
671 		}
672 		memcpy(commit_ids[ncommits - 1].sha1, id.sha1,
673 		    SHA1_DIGEST_LENGTH);
674 
675 		pid = STAILQ_FIRST(&commit->parent_ids);
676 		if (pid == NULL)
677 			break;
678 
679 		idx = got_packidx_get_object_idx(packidx, &pid->id);
680 		if (idx == -1)
681 			break;
682 
683 		err = open_commit(&pcommit, pack, packidx, idx, &pid->id,
684 		    objcache);
685 		if (err) {
686 			if (err->code != GOT_ERR_NO_OBJ)
687 				goto done;
688 			err = NULL;
689 			break;
690 		}
691 
692 		if (path[0] == '/' && path[1] == '\0') {
693 			if (got_object_id_cmp(pcommit->tree_id,
694 			    commit->tree_id) != 0) {
695 				changed = 1;
696 				break;
697 			}
698 		} else {
699 			int pidx;
700 			uint8_t *buf = NULL, *pbuf = NULL;
701 
702 			idx = got_packidx_get_object_idx(packidx,
703 			    commit->tree_id);
704 			if (idx == -1)
705 				break;
706 			pidx = got_packidx_get_object_idx(packidx,
707 			    pcommit->tree_id);
708 			if (pidx == -1)
709 				break;
710 
711 			err = open_tree(&buf, &entries, &nentries, pack,
712 			    packidx, idx, commit->tree_id, objcache);
713 			if (err)
714 				goto done;
715 			err = open_tree(&pbuf, &pentries, &pnentries, pack,
716 			    packidx, pidx, pcommit->tree_id, objcache);
717 			if (err) {
718 				free(buf);
719 				goto done;
720 			}
721 
722 			err = tree_path_changed(&changed, &buf, &pbuf,
723 			    &entries, &nentries, &pentries, &pnentries, path,
724 			    pack, packidx, ibuf, objcache);
725 
726 			free(entries);
727 			entries = NULL;
728 			nentries = 0;
729 			free(buf);
730 			free(pentries);
731 			pentries = NULL;
732 			pnentries = 0;
733 			free(pbuf);
734 			if (err) {
735 				if (err->code != GOT_ERR_NO_OBJ)
736 					goto done;
737 				err = NULL;
738 				break;
739 			}
740 		}
741 
742 		if (!changed) {
743 			memcpy(id.sha1, pid->id.sha1, SHA1_DIGEST_LENGTH);
744 			got_object_commit_close(commit);
745 			commit = pcommit;
746 			pcommit = NULL;
747 		}
748 	} while (!changed);
749 
750 	if (ncommits > 0) {
751 		err = send_traversed_commits(commit_ids, ncommits, ibuf);
752 		if (err)
753 			goto done;
754 
755 		if (changed) {
756 			err = got_privsep_send_commit(ibuf, commit);
757 			if (err)
758 				goto done;
759 		}
760 	}
761 	err = send_commit_traversal_done(ibuf);
762 done:
763 	free(commit_ids);
764 	if (commit)
765 		got_object_commit_close(commit);
766 	if (pcommit)
767 		got_object_commit_close(pcommit);
768 	free(entries);
769 	free(pentries);
770 	if (err) {
771 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
772 			err = NULL;
773 		else
774 			got_privsep_send_error(ibuf, err);
775 	}
776 
777 	return err;
778 }
779 
780 static const struct got_error *
781 raw_object_request(struct imsg *imsg, struct imsgbuf *ibuf,
782     struct got_pack *pack, struct got_packidx *packidx,
783     struct got_object_cache *objcache, FILE *basefile, FILE *accumfile)
784 {
785 	const struct got_error *err = NULL;
786 	uint8_t *buf = NULL;
787 	uint64_t size = 0;
788 	FILE *outfile = NULL;
789 	struct got_imsg_packed_object iobj;
790 	struct got_object *obj;
791 	struct got_object_id id;
792 	size_t datalen;
793 
794 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
795 	if (datalen != sizeof(iobj))
796 		return got_error(GOT_ERR_PRIVSEP_LEN);
797 	memcpy(&iobj, imsg->data, sizeof(iobj));
798 	memcpy(id.sha1, iobj.id, SHA1_DIGEST_LENGTH);
799 
800 	obj = got_object_cache_get(objcache, &id);
801 	if (obj) {
802 		obj->refcnt++;
803 	} else {
804 		err = open_object(&obj, pack, packidx, iobj.idx, &id,
805 		    objcache);
806 		if (err)
807 			return err;
808 	}
809 
810 	err = receive_file(&outfile, ibuf, GOT_IMSG_RAW_OBJECT_OUTFD);
811 	if (err)
812 		return err;
813 
814 	if (obj->flags & GOT_OBJ_FLAG_DELTIFIED) {
815 		err = got_pack_get_max_delta_object_size(&size, obj, pack);
816 		if (err)
817 			goto done;
818 	} else
819 		size = obj->size;
820 
821 	if (size <= GOT_PRIVSEP_INLINE_OBJECT_DATA_MAX)
822 		err = got_packfile_extract_object_to_mem(&buf, &obj->size,
823 		    obj, pack);
824 	else
825 		err = got_packfile_extract_object(pack, obj, outfile, basefile,
826 		    accumfile);
827 	if (err)
828 		goto done;
829 
830 	err = got_privsep_send_raw_obj(ibuf, obj->size, obj->hdrlen, buf);
831 done:
832 	free(buf);
833 	if (outfile && fclose(outfile) == EOF && err == NULL)
834 		err = got_error_from_errno("fclose");
835 	got_object_close(obj);
836 	if (err && err->code != GOT_ERR_PRIVSEP_PIPE)
837 		got_privsep_send_error(ibuf, err);
838 
839 	return err;
840 }
841 
842 static const struct got_error *
843 get_base_object_id(struct got_object_id *base_id, struct got_packidx *packidx,
844     off_t base_offset)
845 {
846 	const struct got_error *err;
847 	int idx;
848 
849 	err = got_packidx_get_offset_idx(&idx, packidx, base_offset); 
850 	if (err)
851 		return err;
852 	if (idx == -1)
853 		return got_error(GOT_ERR_BAD_PACKIDX);
854 
855 	return got_packidx_get_object_id(base_id, packidx, idx);
856 }
857 
858 static const struct got_error *
859 raw_delta_request(struct imsg *imsg, struct imsgbuf *ibuf,
860     FILE *delta_outfile, struct got_pack *pack,
861     struct got_packidx *packidx)
862 {
863 	const struct got_error *err = NULL;
864 	struct got_imsg_raw_delta_request req;
865 	size_t datalen, delta_size, delta_compressed_size;
866 	off_t delta_offset;
867 	uint8_t *delta_buf = NULL;
868 	struct got_object_id id, base_id;
869 	off_t base_offset, delta_out_offset = 0;
870 	uint64_t base_size = 0, result_size = 0;
871 	size_t w;
872 
873 	datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
874 	if (datalen != sizeof(req))
875 		return got_error(GOT_ERR_PRIVSEP_LEN);
876 	memcpy(&req, imsg->data, sizeof(req));
877 	memcpy(id.sha1, req.id, SHA1_DIGEST_LENGTH);
878 
879 	imsg->fd = -1;
880 
881 	err = got_packfile_extract_raw_delta(&delta_buf, &delta_size,
882 	    &delta_compressed_size, &delta_offset, &base_offset, &base_id,
883 	    &base_size, &result_size, pack, packidx, req.idx);
884 	if (err)
885 		goto done;
886 
887 	/*
888 	 * If this is an offset delta we must determine the base
889 	 * object ID ourselves.
890 	 */
891 	if (base_offset != 0) {
892 		err = get_base_object_id(&base_id, packidx, base_offset);
893 		if (err)
894 			goto done;
895 	}
896 
897 	delta_out_offset = ftello(delta_outfile);
898 	w = fwrite(delta_buf, 1, delta_compressed_size, delta_outfile);
899 	if (w != delta_compressed_size) {
900 		err = got_ferror(delta_outfile, GOT_ERR_IO);
901 		goto done;
902 	}
903 	if (fflush(delta_outfile) == -1) {
904 		err = got_error_from_errno("fflush");
905 		goto done;
906 	}
907 
908 	err = got_privsep_send_raw_delta(ibuf, base_size, result_size,
909 	    delta_size, delta_compressed_size, delta_offset, delta_out_offset,
910 	    &base_id);
911 done:
912 	free(delta_buf);
913 	return err;
914 }
915 
916 struct search_deltas_arg {
917 	struct imsgbuf *ibuf;
918 	struct got_packidx *packidx;
919 	struct got_pack *pack;
920 	struct got_object_idset *idset;
921 	FILE *delta_outfile;
922 	struct got_imsg_reused_delta deltas[GOT_IMSG_REUSED_DELTAS_MAX_NDELTAS];
923 	size_t ndeltas;
924 };
925 
926 static const struct got_error *
927 search_delta_for_object(struct got_object_id *id, void *data, void *arg)
928 {
929 	const struct got_error *err;
930 	struct search_deltas_arg *a = arg;
931 	int obj_idx;
932 	uint8_t *delta_buf = NULL;
933 	uint64_t base_size, result_size;
934 	size_t delta_size, delta_compressed_size;
935 	off_t delta_offset, base_offset;
936 	struct got_object_id base_id;
937 
938 	if (sigint_received)
939 		return got_error(GOT_ERR_CANCELLED);
940 
941 	obj_idx = got_packidx_get_object_idx(a->packidx, id);
942 	if (obj_idx == -1)
943 		return NULL; /* object not present in our pack file */
944 
945 	err = got_packfile_extract_raw_delta(&delta_buf, &delta_size,
946 	    &delta_compressed_size, &delta_offset, &base_offset, &base_id,
947 	    &base_size, &result_size, a->pack, a->packidx, obj_idx);
948 	if (err) {
949 		if (err->code == GOT_ERR_OBJ_TYPE)
950 			return NULL; /* object not stored as a delta */
951 		return err;
952 	}
953 
954 	/*
955 	 * If this is an offset delta we must determine the base
956 	 * object ID ourselves.
957 	 */
958 	if (base_offset != 0) {
959 		err = get_base_object_id(&base_id, a->packidx, base_offset);
960 		if (err)
961 			goto done;
962 	}
963 
964 	if (got_object_idset_contains(a->idset, &base_id)) {
965 		struct got_imsg_reused_delta *delta;
966 		off_t delta_out_offset = ftello(a->delta_outfile);
967 		size_t w;
968 
969 		w = fwrite(delta_buf, 1, delta_compressed_size,
970 		    a->delta_outfile);
971 		if (w != delta_compressed_size) {
972 			err = got_ferror(a->delta_outfile, GOT_ERR_IO);
973 			goto done;
974 		}
975 
976 		delta = &a->deltas[a->ndeltas++];
977 		memcpy(&delta->id, id, sizeof(delta->id));
978 		memcpy(&delta->base_id, &base_id, sizeof(delta->base_id));
979 		delta->base_size = base_size;
980 		delta->result_size = result_size;
981 		delta->delta_size = delta_size;
982 		delta->delta_compressed_size = delta_compressed_size;
983 		delta->delta_offset = delta_offset;
984 		delta->delta_out_offset = delta_out_offset;
985 
986 		if (a->ndeltas >= GOT_IMSG_REUSED_DELTAS_MAX_NDELTAS) {
987 			err = got_privsep_send_reused_deltas(a->ibuf,
988 			    a->deltas, a->ndeltas);
989 			if (err)
990 				goto done;
991 			a->ndeltas = 0;
992 		}
993 	}
994 done:
995 	free(delta_buf);
996 	return err;
997 }
998 
999 static const struct got_error *
1000 recv_object_ids(struct got_object_idset *idset, struct imsgbuf *ibuf)
1001 {
1002 	const struct got_error *err = NULL;
1003 	int done = 0;
1004 	struct got_object_id *ids;
1005 	size_t nids, i;
1006 
1007 	for (;;) {
1008 		err = got_privsep_recv_object_idlist(&done, &ids, &nids, ibuf);
1009 		if (err || done)
1010 			break;
1011 		for (i = 0; i < nids; i++) {
1012 			err = got_object_idset_add(idset, &ids[i], NULL);
1013 			if (err) {
1014 				free(ids);
1015 				return err;
1016 			}
1017 		}
1018 		free(ids);
1019 	}
1020 
1021 	return err;
1022 }
1023 
1024 static const struct got_error *
1025 delta_reuse_request(struct imsg *imsg, struct imsgbuf *ibuf,
1026     FILE *delta_outfile, struct got_pack *pack, struct got_packidx *packidx)
1027 {
1028 	const struct got_error *err = NULL;
1029 	struct got_object_idset *idset;
1030 	struct search_deltas_arg sda;
1031 
1032 	idset = got_object_idset_alloc();
1033 	if (idset == NULL)
1034 		return got_error_from_errno("got_object_idset_alloc");
1035 
1036 	err = recv_object_ids(idset, ibuf);
1037 	if (err)
1038 		return err;
1039 
1040 	memset(&sda, 0, sizeof(sda));
1041 	sda.ibuf = ibuf;
1042 	sda.idset = idset;
1043 	sda.pack = pack;
1044 	sda.packidx = packidx;
1045 	sda.delta_outfile = delta_outfile;
1046 	err = got_object_idset_for_each(idset, search_delta_for_object, &sda);
1047 	if (err)
1048 		goto done;
1049 
1050 	if (sda.ndeltas > 0) {
1051 		err = got_privsep_send_reused_deltas(ibuf, sda.deltas,
1052 		    sda.ndeltas);
1053 		if (err)
1054 			goto done;
1055 	}
1056 
1057 	if (fflush(delta_outfile) == -1) {
1058 		err = got_error_from_errno("fflush");
1059 		goto done;
1060 	}
1061 
1062 	err = got_privsep_send_reused_deltas_done(ibuf);
1063 done:
1064 	got_object_idset_free(idset);
1065 	return err;
1066 }
1067 
1068 static const struct got_error *
1069 receive_packidx(struct got_packidx **packidx, struct imsgbuf *ibuf)
1070 {
1071 	const struct got_error *err = NULL;
1072 	struct imsg imsg;
1073 	struct got_imsg_packidx ipackidx;
1074 	size_t datalen;
1075 	struct got_packidx *p;
1076 
1077 	*packidx = NULL;
1078 
1079 	err = got_privsep_recv_imsg(&imsg, ibuf, 0);
1080 	if (err)
1081 		return err;
1082 
1083 	p = calloc(1, sizeof(*p));
1084 	if (p == NULL) {
1085 		err = got_error_from_errno("calloc");
1086 		goto done;
1087 	}
1088 
1089 	if (imsg.hdr.type != GOT_IMSG_PACKIDX) {
1090 		err = got_error(GOT_ERR_PRIVSEP_MSG);
1091 		goto done;
1092 	}
1093 
1094 	if (imsg.fd == -1) {
1095 		err = got_error(GOT_ERR_PRIVSEP_NO_FD);
1096 		goto done;
1097 	}
1098 
1099 	datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1100 	if (datalen != sizeof(ipackidx)) {
1101 		err = got_error(GOT_ERR_PRIVSEP_LEN);
1102 		goto done;
1103 	}
1104 	memcpy(&ipackidx, imsg.data, sizeof(ipackidx));
1105 
1106 	p->len = ipackidx.len;
1107 	p->fd = dup(imsg.fd);
1108 	if (p->fd == -1) {
1109 		err = got_error_from_errno("dup");
1110 		goto done;
1111 	}
1112 	if (lseek(p->fd, 0, SEEK_SET) == -1) {
1113 		err = got_error_from_errno("lseek");
1114 		goto done;
1115 	}
1116 
1117 #ifndef GOT_PACK_NO_MMAP
1118 	p->map = mmap(NULL, p->len, PROT_READ, MAP_PRIVATE, p->fd, 0);
1119 	if (p->map == MAP_FAILED)
1120 		p->map = NULL; /* fall back to read(2) */
1121 #endif
1122 	err = got_packidx_init_hdr(p, 1, ipackidx.packfile_size);
1123 done:
1124 	if (err) {
1125 		if (imsg.fd != -1)
1126 			close(imsg.fd);
1127 		got_packidx_close(p);
1128 	} else
1129 		*packidx = p;
1130 	imsg_free(&imsg);
1131 	return err;
1132 }
1133 
1134 static const struct got_error *
1135 receive_pack(struct got_pack **packp, struct imsgbuf *ibuf)
1136 {
1137 	const struct got_error *err = NULL;
1138 	struct imsg imsg;
1139 	struct got_imsg_pack ipack;
1140 	size_t datalen;
1141 	struct got_pack *pack;
1142 
1143 	*packp = NULL;
1144 
1145 	err = got_privsep_recv_imsg(&imsg, ibuf, 0);
1146 	if (err)
1147 		return err;
1148 
1149 	pack = calloc(1, sizeof(*pack));
1150 	if (pack == NULL) {
1151 		err = got_error_from_errno("calloc");
1152 		goto done;
1153 	}
1154 
1155 	if (imsg.hdr.type != GOT_IMSG_PACK) {
1156 		err = got_error(GOT_ERR_PRIVSEP_MSG);
1157 		goto done;
1158 	}
1159 
1160 	if (imsg.fd == -1) {
1161 		err = got_error(GOT_ERR_PRIVSEP_NO_FD);
1162 		goto done;
1163 	}
1164 
1165 	datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
1166 	if (datalen != sizeof(ipack)) {
1167 		err = got_error(GOT_ERR_PRIVSEP_LEN);
1168 		goto done;
1169 	}
1170 	memcpy(&ipack, imsg.data, sizeof(ipack));
1171 
1172 	pack->filesize = ipack.filesize;
1173 	pack->fd = dup(imsg.fd);
1174 	if (pack->fd == -1) {
1175 		err = got_error_from_errno("dup");
1176 		goto done;
1177 	}
1178 	if (lseek(pack->fd, 0, SEEK_SET) == -1) {
1179 		err = got_error_from_errno("lseek");
1180 		goto done;
1181 	}
1182 	pack->path_packfile = strdup(ipack.path_packfile);
1183 	if (pack->path_packfile == NULL) {
1184 		err = got_error_from_errno("strdup");
1185 		goto done;
1186 	}
1187 
1188 	err = got_delta_cache_alloc(&pack->delta_cache);
1189 	if (err)
1190 		goto done;
1191 
1192 #ifndef GOT_PACK_NO_MMAP
1193 	pack->map = mmap(NULL, pack->filesize, PROT_READ, MAP_PRIVATE,
1194 	    pack->fd, 0);
1195 	if (pack->map == MAP_FAILED)
1196 		pack->map = NULL; /* fall back to read(2) */
1197 #endif
1198 done:
1199 	if (err) {
1200 		if (imsg.fd != -1)
1201 			close(imsg.fd);
1202 		free(pack);
1203 	} else
1204 		*packp = pack;
1205 	imsg_free(&imsg);
1206 	return err;
1207 }
1208 
1209 int
1210 main(int argc, char *argv[])
1211 {
1212 	const struct got_error *err = NULL;
1213 	struct imsgbuf ibuf;
1214 	struct imsg imsg;
1215 	struct got_packidx *packidx = NULL;
1216 	struct got_pack *pack = NULL;
1217 	struct got_object_cache objcache;
1218 	FILE *basefile = NULL, *accumfile = NULL, *delta_outfile = NULL;
1219 
1220 	//static int attached;
1221 	//while (!attached) sleep(1);
1222 
1223 	signal(SIGINT, catch_sigint);
1224 
1225 	imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
1226 
1227 	err = got_object_cache_init(&objcache, GOT_OBJECT_CACHE_TYPE_OBJ);
1228 	if (err) {
1229 		err = got_error_from_errno("got_object_cache_init");
1230 		got_privsep_send_error(&ibuf, err);
1231 		return 1;
1232 	}
1233 
1234 #ifndef PROFILE
1235 	/* revoke access to most system calls */
1236 	if (pledge("stdio recvfd", NULL) == -1) {
1237 		err = got_error_from_errno("pledge");
1238 		got_privsep_send_error(&ibuf, err);
1239 		return 1;
1240 	}
1241 #endif
1242 
1243 	err = receive_packidx(&packidx, &ibuf);
1244 	if (err) {
1245 		got_privsep_send_error(&ibuf, err);
1246 		return 1;
1247 	}
1248 
1249 	err = receive_pack(&pack, &ibuf);
1250 	if (err) {
1251 		got_privsep_send_error(&ibuf, err);
1252 		return 1;
1253 	}
1254 
1255 	for (;;) {
1256 		imsg.fd = -1;
1257 
1258 		if (sigint_received) {
1259 			err = got_error(GOT_ERR_CANCELLED);
1260 			break;
1261 		}
1262 
1263 		err = got_privsep_recv_imsg(&imsg, &ibuf, 0);
1264 		if (err) {
1265 			if (err->code == GOT_ERR_PRIVSEP_PIPE)
1266 				err = NULL;
1267 			break;
1268 		}
1269 
1270 		if (imsg.hdr.type == GOT_IMSG_STOP)
1271 			break;
1272 
1273 		switch (imsg.hdr.type) {
1274 		case GOT_IMSG_TMPFD:
1275 			if (basefile == NULL) {
1276 				err = receive_tempfile(&basefile, "w+",
1277 				   &imsg, &ibuf);
1278 			} else if (accumfile == NULL) {
1279 				err = receive_tempfile(&accumfile, "w+",
1280 				   &imsg, &ibuf);
1281 			} else
1282 				err = got_error(GOT_ERR_PRIVSEP_MSG);
1283 			break;
1284 		case GOT_IMSG_PACKED_OBJECT_REQUEST:
1285 			err = object_request(&imsg, &ibuf, pack, packidx,
1286 			    &objcache);
1287 			break;
1288 		case GOT_IMSG_PACKED_RAW_OBJECT_REQUEST:
1289 			if (basefile == NULL || accumfile == NULL) {
1290 				err = got_error(GOT_ERR_PRIVSEP_MSG);
1291 				break;
1292 			}
1293 			err = raw_object_request(&imsg, &ibuf, pack, packidx,
1294 			    &objcache, basefile, accumfile);
1295 			break;
1296 		case GOT_IMSG_RAW_DELTA_OUTFD:
1297 			if (delta_outfile != NULL) {
1298 				err = got_error(GOT_ERR_PRIVSEP_MSG);
1299 				break;
1300 			}
1301 			err = receive_tempfile(&delta_outfile, "w",
1302 			    &imsg, &ibuf);
1303 			break;
1304 		case GOT_IMSG_RAW_DELTA_REQUEST:
1305 			if (delta_outfile == NULL) {
1306 				err = got_error(GOT_ERR_PRIVSEP_NO_FD);
1307 				break;
1308 			}
1309 			err = raw_delta_request(&imsg, &ibuf, delta_outfile,
1310 			    pack, packidx);
1311 			break;
1312 		case GOT_IMSG_DELTA_REUSE_REQUEST:
1313 			if (delta_outfile == NULL) {
1314 				err = got_error(GOT_ERR_PRIVSEP_NO_FD);
1315 				break;
1316 			}
1317 			err = delta_reuse_request(&imsg, &ibuf,
1318 			    delta_outfile, pack, packidx);
1319 			break;
1320 		case GOT_IMSG_COMMIT_REQUEST:
1321 			err = commit_request(&imsg, &ibuf, pack, packidx,
1322 			    &objcache);
1323 			break;
1324 		case GOT_IMSG_TREE_REQUEST:
1325 			err = tree_request(&imsg, &ibuf, pack, packidx,
1326 			    &objcache);
1327 			break;
1328 		case GOT_IMSG_BLOB_REQUEST:
1329 			if (basefile == NULL || accumfile == NULL) {
1330 				err = got_error(GOT_ERR_PRIVSEP_MSG);
1331 				break;
1332 			}
1333 			err = blob_request(&imsg, &ibuf, pack, packidx,
1334 			    &objcache, basefile, accumfile);
1335 			break;
1336 		case GOT_IMSG_TAG_REQUEST:
1337 			err = tag_request(&imsg, &ibuf, pack, packidx,
1338 			    &objcache);
1339 			break;
1340 		case GOT_IMSG_COMMIT_TRAVERSAL_REQUEST:
1341 			err = commit_traversal_request(&imsg, &ibuf, pack,
1342 			    packidx, &objcache);
1343 			break;
1344 		default:
1345 			err = got_error(GOT_ERR_PRIVSEP_MSG);
1346 			break;
1347 		}
1348 
1349 		if (imsg.fd != -1 && close(imsg.fd) == -1 && err == NULL)
1350 			err = got_error_from_errno("close");
1351 		imsg_free(&imsg);
1352 		if (err)
1353 			break;
1354 	}
1355 
1356 	if (packidx)
1357 		got_packidx_close(packidx);
1358 	if (pack)
1359 		got_pack_close(pack);
1360 	got_object_cache_close(&objcache);
1361 	imsg_clear(&ibuf);
1362 	if (basefile && fclose(basefile) == EOF && err == NULL)
1363 		err = got_error_from_errno("fclose");
1364 	if (accumfile && fclose(accumfile) == EOF && err == NULL)
1365 		err = got_error_from_errno("fclose");
1366 	if (delta_outfile && fclose(delta_outfile) == EOF && err == NULL)
1367 		err = got_error_from_errno("fclose");
1368 	if (err) {
1369 		if (!sigint_received && err->code != GOT_ERR_PRIVSEP_PIPE) {
1370 			fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
1371 			got_privsep_send_error(&ibuf, err);
1372 		}
1373 	}
1374 	if (close(GOT_IMSG_FD_CHILD) == -1 && err == NULL)
1375 		err = got_error_from_errno("close");
1376 	return err ? 1 : 0;
1377 }