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