2 * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
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.
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.
17 #include <sys/types.h>
19 #include <sys/queue.h>
32 #include "got_error.h"
33 #include "got_object.h"
34 #include "got_repository.h"
36 #include "got_sha1_priv.h"
37 #include "got_pack_priv.h"
38 #include "got_path_priv.h"
39 #include "got_delta_priv.h"
40 #include "got_zb_priv.h"
41 #include "got_object_priv.h"
43 #define GOT_PACK_PREFIX "pack-"
44 #define GOT_PACKFILE_SUFFIX ".pack"
45 #define GOT_PACKIDX_SUFFIX ".idx"
46 #define GOT_PACKFILE_NAMELEN (strlen(GOT_PACK_PREFIX) + \
47 SHA1_DIGEST_STRING_LENGTH - 1 + \
48 strlen(GOT_PACKFILE_SUFFIX))
49 #define GOT_PACKIDX_NAMELEN (strlen(GOT_PACK_PREFIX) + \
50 SHA1_DIGEST_STRING_LENGTH - 1 + \
51 strlen(GOT_PACKIDX_SUFFIX))
54 #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
57 static const struct got_error *
58 verify_fanout_table(uint32_t *fanout_table)
62 for (i = 0; i < 0xff - 1; i++) {
63 if (be32toh(fanout_table[i]) > be32toh(fanout_table[i + 1]))
64 return got_error(GOT_ERR_BAD_PACKIDX);
70 static const struct got_error *
71 get_packfile_size(size_t *size, const char *path_idx)
75 char base_path[PATH_MAX];
78 if (strlcpy(base_path, path_idx, PATH_MAX) > PATH_MAX)
79 return got_error(GOT_ERR_NO_SPACE);
81 dot = strrchr(base_path, '.');
83 return got_error(GOT_ERR_BAD_PATH);
85 if (asprintf(&path_pack, "%s.pack", base_path) == -1)
86 return got_error(GOT_ERR_NO_MEM);
88 if (stat(path_pack, &sb) != 0) {
90 return got_error_from_errno();
98 const struct got_error *
99 got_packidx_open(struct got_packidx_v2_hdr **packidx, const char *path)
101 struct got_packidx_v2_hdr *p;
103 const struct got_error *err = NULL;
104 size_t n, nobj, packfile_size;
106 uint8_t sha1[SHA1_DIGEST_LENGTH];
110 f = fopen(path, "rb");
112 return got_error(GOT_ERR_BAD_PATH);
114 err = get_packfile_size(&packfile_size, path);
118 p = calloc(1, sizeof(*p));
120 err = got_error(GOT_ERR_NO_MEM);
124 n = fread(&p->magic, sizeof(p->magic), 1, f);
126 err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
130 if (betoh32(p->magic) != GOT_PACKIDX_V2_MAGIC) {
131 err = got_error(GOT_ERR_BAD_PACKIDX);
135 SHA1Update(&ctx, (uint8_t *)&p->magic, sizeof(p->magic));
137 n = fread(&p->version, sizeof(p->version), 1, f);
139 err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
143 if (betoh32(p->version) != GOT_PACKIDX_VERSION) {
144 err = got_error(GOT_ERR_BAD_PACKIDX);
148 SHA1Update(&ctx, (uint8_t *)&p->version, sizeof(p->version));
150 n = fread(&p->fanout_table, sizeof(p->fanout_table), 1, f);
152 err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
156 err = verify_fanout_table(p->fanout_table);
160 SHA1Update(&ctx, (uint8_t *)p->fanout_table, sizeof(p->fanout_table));
162 nobj = betoh32(p->fanout_table[0xff]);
164 p->sorted_ids = calloc(nobj, sizeof(*p->sorted_ids));
165 if (p->sorted_ids == NULL) {
166 err = got_error(GOT_ERR_NO_MEM);
170 n = fread(p->sorted_ids, sizeof(*p->sorted_ids), nobj, f);
172 err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
176 SHA1Update(&ctx, (uint8_t *)p->sorted_ids,
177 nobj * sizeof(*p->sorted_ids));
179 p->crc32 = calloc(nobj, sizeof(*p->crc32));
180 if (p->crc32 == NULL) {
181 err = got_error(GOT_ERR_NO_MEM);
185 n = fread(p->crc32, sizeof(*p->crc32), nobj, f);
187 err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
191 SHA1Update(&ctx, (uint8_t *)p->crc32, nobj * sizeof(*p->crc32));
193 p->offsets = calloc(nobj, sizeof(*p->offsets));
194 if (p->offsets == NULL) {
195 err = got_error(GOT_ERR_NO_MEM);
199 n = fread(p->offsets, sizeof(*p->offsets), nobj, f);
201 err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
205 SHA1Update(&ctx, (uint8_t *)p->offsets, nobj * sizeof(*p->offsets));
207 /* Large file offsets are contained only in files > 2GB. */
208 if (packfile_size <= 0x80000000)
211 p->large_offsets = calloc(nobj, sizeof(*p->large_offsets));
212 if (p->large_offsets == NULL) {
213 err = got_error(GOT_ERR_NO_MEM);
217 n = fread(p->large_offsets, sizeof(*p->large_offsets), nobj, f);
219 err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
223 SHA1Update(&ctx, (uint8_t*)p->large_offsets,
224 nobj * sizeof(*p->large_offsets));
227 n = fread(&p->trailer, sizeof(p->trailer), 1, f);
229 err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
233 SHA1Update(&ctx, p->trailer.packfile_sha1, SHA1_DIGEST_LENGTH);
234 SHA1Final(sha1, &ctx);
235 if (memcmp(p->trailer.packidx_sha1, sha1, SHA1_DIGEST_LENGTH) != 0)
236 err = got_error(GOT_ERR_PACKIDX_CSUM);
240 got_packidx_close(p);
247 got_packidx_close(struct got_packidx_v2_hdr *packidx)
249 free(packidx->sorted_ids);
250 free(packidx->offsets);
251 free(packidx->crc32);
252 free(packidx->large_offsets);
257 is_packidx_filename(const char *name, size_t len)
259 if (len != GOT_PACKIDX_NAMELEN)
262 if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
265 if (strcmp(name + strlen(GOT_PACK_PREFIX) +
266 SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
273 get_object_offset(struct got_packidx_v2_hdr *packidx, int idx)
275 uint32_t totobj = betoh32(packidx->fanout_table[0xff]);
276 uint32_t offset = betoh32(packidx->offsets[idx]);
277 if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
279 idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
280 if (idx < 0 || idx > totobj || packidx->large_offsets == NULL)
282 loffset = betoh64(packidx->large_offsets[idx]);
283 return (loffset > INT64_MAX ? -1 : (off_t)loffset);
285 return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
289 get_object_idx(struct got_packidx_v2_hdr *packidx, struct got_object_id *id)
291 u_int8_t id0 = id->sha1[0];
292 uint32_t totobj = betoh32(packidx->fanout_table[0xff]);
296 i = betoh32(packidx->fanout_table[id0 - 1]);
299 struct got_object_id *oid = &packidx->sorted_ids[i];
301 int cmp = got_object_id_cmp(id, oid);
311 static const struct got_error *
312 search_packidx(struct got_packidx_v2_hdr **packidx, int *idx,
313 struct got_repository *repo, struct got_object_id *id)
315 const struct got_error *err;
321 path_packdir = got_repo_get_path_objects_pack(repo);
322 if (path_packdir == NULL)
323 return got_error(GOT_ERR_NO_MEM);
325 packdir = opendir(path_packdir);
326 if (packdir == NULL) {
327 err = got_error_from_errno();
331 while ((dent = readdir(packdir)) != NULL) {
332 if (!is_packidx_filename(dent->d_name, dent->d_namlen))
335 if (asprintf(&path_packidx, "%s/%s", path_packdir,
336 dent->d_name) == -1) {
337 err = got_error(GOT_ERR_NO_MEM);
341 err = got_packidx_open(packidx, path_packidx);
346 *idx = get_object_idx(*packidx, id);
348 err = NULL; /* found the object */
352 got_packidx_close(*packidx);
356 err = got_error(GOT_ERR_NO_OBJ);
359 if (packdir && closedir(packdir) != 0 && err == 0)
360 err = got_error_from_errno();
364 static const struct got_error *
365 get_packfile_path(char **path_packfile, struct got_repository *repo,
366 struct got_packidx_v2_hdr *packidx)
369 char hex[SHA1_DIGEST_STRING_LENGTH];
373 *path_packfile = NULL;
375 path_packdir = got_repo_get_path_objects_pack(repo);
376 if (path_packdir == NULL)
377 return got_error(GOT_ERR_NO_MEM);
379 sha1str = got_sha1_digest_to_str(packidx->trailer.packfile_sha1,
382 return got_error(GOT_ERR_PACKIDX_CSUM);
384 if (asprintf(path_packfile, "%s/%s%s%s", path_packdir,
385 GOT_PACK_PREFIX, sha1str, GOT_PACKFILE_SUFFIX) == -1) {
386 *path_packfile = NULL;
387 return got_error(GOT_ERR_NO_MEM);
393 const struct got_error *
394 read_packfile_hdr(FILE *f, struct got_packidx_v2_hdr *packidx)
396 const struct got_error *err = NULL;
397 uint32_t totobj = betoh32(packidx->fanout_table[0xff]);
398 struct got_packfile_hdr hdr;
401 n = fread(&hdr, sizeof(hdr), 1, f);
403 return got_ferror(f, GOT_ERR_BAD_PACKIDX);
405 if (betoh32(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
406 betoh32(hdr.version) != GOT_PACKFILE_VERSION ||
407 betoh32(hdr.nobjects) != totobj)
408 err = got_error(GOT_ERR_BAD_PACKFILE);
413 static const struct got_error *
414 open_packfile(FILE **packfile, char **path_packfile,
415 struct got_repository *repo, struct got_packidx_v2_hdr *packidx)
417 const struct got_error *err;
421 err = get_packfile_path(path_packfile, repo, packidx);
425 *packfile = fopen(*path_packfile, "rb");
426 if (*packfile == NULL) {
427 err = got_error_from_errno();
428 free(*path_packfile);
432 err = read_packfile_hdr(*packfile, packidx);
440 static const struct got_error *
441 parse_object_type_and_size(uint8_t *type, uint64_t *size, size_t *len,
451 /* We do not support size values which don't fit in 64 bit. */
453 return got_error(GOT_ERR_NO_SPACE);
455 n = fread(&sizeN, sizeof(sizeN), 1, packfile);
457 return got_ferror(packfile, GOT_ERR_BAD_PACKIDX);
460 t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
461 GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
462 s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
464 size_t shift = 4 + 7 * (i - 1);
465 s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
468 } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
472 *len = i * sizeof(sizeN);
476 static const struct got_error *
477 open_plain_object(struct got_object **obj, const char *path_packfile,
478 struct got_object_id *id, uint8_t type, off_t offset, size_t size)
480 *obj = calloc(1, sizeof(**obj));
482 return got_error(GOT_ERR_NO_MEM);
484 (*obj)->path_packfile = strdup(path_packfile);
485 if ((*obj)->path_packfile == NULL) {
488 return got_error(GOT_ERR_NO_MEM);
492 (*obj)->flags = GOT_OBJ_FLAG_PACKED;
495 memcpy(&(*obj)->id, id, sizeof((*obj)->id));
496 (*obj)->pack_offset = offset;
501 static const struct got_error *
502 parse_negative_offset(int64_t *offset, size_t *len, FILE *packfile)
510 /* We do not support offset values which don't fit in 64 bit. */
512 return got_error(GOT_ERR_NO_SPACE);
514 n = fread(&offN, sizeof(offN), 1, packfile);
516 return got_ferror(packfile, GOT_ERR_BAD_PACKIDX);
519 o = (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
523 o += (offN & GOT_PACK_OBJ_DELTA_OFF_VAL_MASK);
526 } while (offN & GOT_PACK_OBJ_DELTA_OFF_MORE);
529 *len = i * sizeof(offN);
533 static const struct got_error *
534 parse_offset_delta(off_t *base_offset, FILE *packfile, off_t offset)
536 const struct got_error *err;
540 err = parse_negative_offset(&negoffset, &negofflen, packfile);
544 /* Compute the base object's offset (must be in the same pack file). */
545 *base_offset = (offset - negoffset);
546 if (*base_offset <= 0)
547 return got_error(GOT_ERR_BAD_PACKFILE);
552 static const struct got_error *
553 resolve_delta_chain(struct got_delta_chain *, struct got_repository *,
554 FILE *, const char *, off_t, size_t, int, size_t);
556 static const struct got_error *
557 add_delta(struct got_delta_chain *deltas, const char *path_packfile,
558 off_t delta_offset, size_t tslen, int delta_type, size_t delta_size,
559 size_t delta_data_offset)
561 struct got_delta *delta;
563 delta = got_delta_open(path_packfile, delta_offset, tslen,
564 delta_type, delta_size, delta_data_offset);
566 return got_error(GOT_ERR_NO_MEM);
567 /* delta is freed in got_object_close() */
569 SIMPLEQ_INSERT_HEAD(&deltas->entries, delta, entry);
573 static const struct got_error *
574 resolve_offset_delta(struct got_delta_chain *deltas,
575 struct got_repository *repo, FILE *packfile, const char *path_packfile,
576 off_t delta_offset,size_t tslen, int delta_type, size_t delta_size)
579 const struct got_error *err;
584 off_t delta_data_offset;
586 err = parse_offset_delta(&base_offset, packfile, delta_offset);
590 delta_data_offset = ftello(packfile);
591 if (delta_data_offset == -1)
592 return got_error_from_errno();
594 err = add_delta(deltas, path_packfile, delta_offset, tslen,
595 delta_type, delta_size, delta_data_offset);
599 /* An offset delta must be in the same packfile. */
600 if (fseeko(packfile, base_offset, SEEK_SET) != 0)
601 return got_error_from_errno();
603 err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
608 return resolve_delta_chain(deltas, repo, packfile, path_packfile,
609 base_offset, base_tslen, base_type, base_size);
612 static const struct got_error *
613 resolve_ref_delta(struct got_delta_chain *deltas, struct got_repository *repo,
614 FILE *packfile, const char *path_packfile, off_t delta_offset,
615 size_t tslen, int delta_type, size_t delta_size)
617 const struct got_error *err;
618 struct got_object_id id;
619 struct got_packidx_v2_hdr *packidx;
627 char *path_base_packfile;
628 off_t delta_data_offset;
630 n = fread(&id, sizeof(id), 1, packfile);
632 return got_ferror(packfile, GOT_ERR_IO);
634 delta_data_offset = ftello(packfile);
635 if (delta_data_offset == -1)
636 return got_error_from_errno();
638 err = add_delta(deltas, path_packfile, delta_offset, tslen,
639 delta_type, delta_size, delta_data_offset);
643 err = search_packidx(&packidx, &idx, repo, &id);
647 base_offset = get_object_offset(packidx, idx);
648 if (base_offset == (uint64_t)-1) {
649 got_packidx_close(packidx);
650 return got_error(GOT_ERR_BAD_PACKIDX);
653 err = open_packfile(&base_packfile, &path_base_packfile, repo, packidx);
654 got_packidx_close(packidx);
658 if (fseeko(base_packfile, base_offset, SEEK_SET) != 0) {
659 err = got_error_from_errno();
663 err = parse_object_type_and_size(&base_type, &base_size, &base_tslen,
668 err = resolve_delta_chain(deltas, repo, base_packfile,
669 path_base_packfile, base_offset, base_tslen, base_type,
672 free(path_base_packfile);
673 if (base_packfile && fclose(base_packfile) == -1 && err == 0)
674 err = got_error_from_errno();
678 static const struct got_error *
679 resolve_delta_chain(struct got_delta_chain *deltas, struct got_repository *repo,
680 FILE *packfile, const char *path_packfile, off_t delta_offset, size_t tslen,
681 int delta_type, size_t delta_size)
683 const struct got_error *err = NULL;
685 switch (delta_type) {
686 case GOT_OBJ_TYPE_COMMIT:
687 case GOT_OBJ_TYPE_TREE:
688 case GOT_OBJ_TYPE_BLOB:
689 case GOT_OBJ_TYPE_TAG:
690 /* Plain types are the final delta base. Recursion ends. */
691 err = add_delta(deltas, path_packfile, delta_offset, tslen,
692 delta_type, delta_size, 0);
694 case GOT_OBJ_TYPE_OFFSET_DELTA:
695 err = resolve_offset_delta(deltas, repo, packfile,
696 path_packfile, delta_offset, tslen, delta_type,
699 case GOT_OBJ_TYPE_REF_DELTA:
700 err = resolve_ref_delta(deltas, repo, packfile,
701 path_packfile, delta_offset, tslen, delta_type,
705 return got_error(GOT_ERR_NOT_IMPL);
711 static const struct got_error *
712 open_delta_object(struct got_object **obj, struct got_repository *repo,
713 struct got_packidx_v2_hdr *packidx, const char *path_packfile,
714 FILE *packfile, struct got_object_id *id, off_t offset, size_t tslen,
715 int delta_type, size_t delta_size)
717 const struct got_error *err = NULL;
718 struct got_object_id base_id;
724 *obj = calloc(1, sizeof(**obj));
726 return got_error(GOT_ERR_NO_MEM);
730 (*obj)->size = 0; /* Not known because deltas aren't applied yet. */
731 memcpy(&(*obj)->id, id, sizeof((*obj)->id));
732 (*obj)->pack_offset = offset + tslen;
734 (*obj)->path_packfile = strdup(path_packfile);
735 if ((*obj)->path_packfile == NULL) {
736 err = got_error(GOT_ERR_NO_MEM);
739 (*obj)->flags |= GOT_OBJ_FLAG_PACKED;
741 SIMPLEQ_INIT(&(*obj)->deltas.entries);
742 (*obj)->flags |= GOT_OBJ_FLAG_DELTIFIED;
744 err = resolve_delta_chain(&(*obj)->deltas, repo, packfile,
745 path_packfile, offset, tslen, delta_type, delta_size);
749 err = got_delta_chain_get_base_type(&resolved_type, &(*obj)->deltas);
752 (*obj)->type = resolved_type;
756 got_object_close(*obj);
762 static const struct got_error *
763 open_packed_object(struct got_object **obj, struct got_repository *repo,
764 struct got_packidx_v2_hdr *packidx, int idx, struct got_object_id *id)
766 const struct got_error *err = NULL;
776 offset = get_object_offset(packidx, idx);
777 if (offset == (uint64_t)-1)
778 return got_error(GOT_ERR_BAD_PACKIDX);
780 err = open_packfile(&packfile, &path_packfile, repo, packidx);
784 if (fseeko(packfile, offset, SEEK_SET) != 0) {
785 err = got_error_from_errno();
789 err = parse_object_type_and_size(&type, &size, &tslen, packfile);
794 case GOT_OBJ_TYPE_COMMIT:
795 case GOT_OBJ_TYPE_TREE:
796 case GOT_OBJ_TYPE_BLOB:
797 case GOT_OBJ_TYPE_TAG:
798 err = open_plain_object(obj, path_packfile, id, type,
799 offset + tslen, size);
802 case GOT_OBJ_TYPE_OFFSET_DELTA:
803 case GOT_OBJ_TYPE_REF_DELTA:
804 err = open_delta_object(obj, repo, packidx, path_packfile,
805 packfile, id, offset, tslen, type, size);
809 err = got_error(GOT_ERR_NOT_IMPL);
814 if (packfile && fclose(packfile) == -1 && err == 0)
815 err = got_error_from_errno();
819 const struct got_error *
820 got_packfile_open_object(struct got_object **obj, struct got_object_id *id,
821 struct got_repository *repo)
823 const struct got_error *err = NULL;
824 struct got_packidx_v2_hdr *packidx = NULL;
827 err = search_packidx(&packidx, &idx, repo, id);
831 err = open_packed_object(obj, repo, packidx, idx, id);
832 got_packidx_close(packidx);
836 static const struct got_error *
837 dump_delta_chain(struct got_delta_chain *deltas, FILE *outfile)
839 const struct got_error *err = NULL;
840 struct got_delta *delta;
841 FILE *base_file, *accum_file;
844 if (SIMPLEQ_EMPTY(&deltas->entries))
845 return got_error(GOT_ERR_BAD_DELTA_CHAIN);
847 base_file = got_opentemp();
848 if (base_file == NULL)
849 return got_error_from_errno();
851 accum_file = got_opentemp();
852 if (accum_file == NULL) {
853 err = got_error_from_errno();
858 /* Deltas are ordered in ascending order. */
859 SIMPLEQ_FOREACH(delta, &deltas->entries, entry) {
860 uint8_t *delta_buf = NULL;
861 size_t delta_len = 0;
864 delta_file = fopen(delta->path_packfile, "rb");
865 if (delta_file == NULL) {
866 err = got_error_from_errno();
872 /* Plain object types are the delta base. */
873 if (delta->type != GOT_OBJ_TYPE_COMMIT &&
874 delta->type != GOT_OBJ_TYPE_TREE &&
875 delta->type != GOT_OBJ_TYPE_BLOB &&
876 delta->type != GOT_OBJ_TYPE_TAG) {
877 err = got_error(GOT_ERR_BAD_DELTA_CHAIN);
881 if (fseeko(delta_file, delta->offset + delta->tslen,
884 err = got_error_from_errno();
887 err = got_inflate_to_file(&delta_len, delta_file,
897 if (fseeko(delta_file, delta->data_offset, SEEK_CUR) != 0) {
899 err = got_error_from_errno();
903 /* Delta streams should always fit in memory. */
904 err = got_inflate_to_mem(&delta_buf, &delta_len, delta_file);
909 err = got_delta_apply(base_file, delta_buf, delta_len,
910 /* Final delta application writes to the output file. */
911 ++n < deltas->nentries ? accum_file : outfile);
916 if (n < deltas->nentries) {
917 /* Accumulated delta becomes the new base. */
918 FILE *tmp = accum_file;
919 accum_file = base_file;
933 const struct got_error *
934 got_packfile_extract_object(FILE **f, struct got_object *obj,
935 struct got_repository *repo)
937 const struct got_error *err = NULL;
938 FILE *packfile = NULL;
940 if ((obj->flags & GOT_OBJ_FLAG_PACKED) == 0)
941 return got_error(GOT_ERR_OBJ_NOT_PACKED);
945 err = got_error(GOT_ERR_FILE_OPEN);
949 if ((obj->flags & GOT_OBJ_FLAG_DELTIFIED) == 0) {
950 packfile = fopen(obj->path_packfile, "rb");
951 if (packfile == NULL) {
952 err = got_error_from_errno();
956 if (fseeko(packfile, obj->pack_offset, SEEK_SET) != 0) {
957 err = got_error_from_errno();
961 err = got_inflate_to_file(&obj->size, packfile, *f);
963 err = dump_delta_chain(&obj->deltas, *f);