2 0a0a3048 2018-01-10 stsp * Copyright (c) 2018 Stefan Sperling <stsp@openbsd.org>
4 0a0a3048 2018-01-10 stsp * Permission to use, copy, modify, and distribute this software for any
5 0a0a3048 2018-01-10 stsp * purpose with or without fee is hereby granted, provided that the above
6 0a0a3048 2018-01-10 stsp * copyright notice and this permission notice appear in all copies.
8 0a0a3048 2018-01-10 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 0a0a3048 2018-01-10 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 0a0a3048 2018-01-10 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 0a0a3048 2018-01-10 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 0a0a3048 2018-01-10 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 0a0a3048 2018-01-10 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 0a0a3048 2018-01-10 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 a1fd68d8 2018-01-12 stsp #include <sys/types.h>
18 0a0a3048 2018-01-10 stsp #include <sys/stat.h>
19 a1fd68d8 2018-01-12 stsp #include <sys/queue.h>
21 a1fd68d8 2018-01-12 stsp #include <dirent.h>
22 a1fd68d8 2018-01-12 stsp #include <errno.h>
23 0a0a3048 2018-01-10 stsp #include <stdio.h>
24 a1fd68d8 2018-01-12 stsp #include <stdint.h>
25 0a0a3048 2018-01-10 stsp #include <stdlib.h>
26 0a0a3048 2018-01-10 stsp #include <string.h>
27 0a0a3048 2018-01-10 stsp #include <limits.h>
28 0a0a3048 2018-01-10 stsp #include <sha1.h>
29 0a0a3048 2018-01-10 stsp #include <endian.h>
30 a1fd68d8 2018-01-12 stsp #include <zlib.h>
32 0a0a3048 2018-01-10 stsp #include "got_error.h"
33 a1fd68d8 2018-01-12 stsp #include "got_object.h"
34 a1fd68d8 2018-01-12 stsp #include "got_repository.h"
35 a1fd68d8 2018-01-12 stsp #include "got_sha1.h"
36 0a0a3048 2018-01-10 stsp #include "pack.h"
37 a1fd68d8 2018-01-12 stsp #include "path.h"
39 a1fd68d8 2018-01-12 stsp #define GOT_PACK_PREFIX "pack-"
40 a1fd68d8 2018-01-12 stsp #define GOT_PACKFILE_SUFFIX ".pack"
41 a1fd68d8 2018-01-12 stsp #define GOT_PACKIDX_SUFFIX ".idx"
42 a1fd68d8 2018-01-12 stsp #define GOT_PACKFILE_NAMELEN (strlen(GOT_PACK_PREFIX) + \
43 a1fd68d8 2018-01-12 stsp SHA1_DIGEST_STRING_LENGTH - 1 + \
44 a1fd68d8 2018-01-12 stsp strlen(GOT_PACKFILE_SUFFIX))
45 a1fd68d8 2018-01-12 stsp #define GOT_PACKIDX_NAMELEN (strlen(GOT_PACK_PREFIX) + \
46 a1fd68d8 2018-01-12 stsp SHA1_DIGEST_STRING_LENGTH - 1 + \
47 a1fd68d8 2018-01-12 stsp strlen(GOT_PACKIDX_SUFFIX))
50 a1fd68d8 2018-01-12 stsp #define MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
53 0a0a3048 2018-01-10 stsp static const struct got_error *
54 0a0a3048 2018-01-10 stsp verify_fanout_table(uint32_t *fanout_table)
58 0a0a3048 2018-01-10 stsp for (i = 0; i < 0xff - 1; i++) {
59 a1fd68d8 2018-01-12 stsp if (be32toh(fanout_table[i]) > be32toh(fanout_table[i + 1]))
60 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PACKIDX);
63 0a0a3048 2018-01-10 stsp return NULL;
66 24541888 2018-01-10 stsp static const struct got_error *
67 0a0a3048 2018-01-10 stsp get_packfile_size(size_t *size, const char *path_idx)
69 0a0a3048 2018-01-10 stsp struct stat sb;
70 0a0a3048 2018-01-10 stsp char *path_pack;
71 0a0a3048 2018-01-10 stsp char base_path[PATH_MAX];
74 0a0a3048 2018-01-10 stsp if (strlcpy(base_path, path_idx, PATH_MAX) > PATH_MAX)
75 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_NO_SPACE);
77 0a0a3048 2018-01-10 stsp dot = strrchr(base_path, '.');
78 0a0a3048 2018-01-10 stsp if (dot == NULL)
79 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PATH);
80 0a0a3048 2018-01-10 stsp *dot = '\0';
81 0a0a3048 2018-01-10 stsp if (asprintf(&path_pack, "%s.pack", base_path) == -1)
82 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_NO_MEM);
84 0a0a3048 2018-01-10 stsp if (stat(path_pack, &sb) != 0) {
85 0a0a3048 2018-01-10 stsp free(path_pack);
86 8251fdbc 2018-01-12 stsp return got_error_from_errno();
89 0a0a3048 2018-01-10 stsp free(path_pack);
90 0a0a3048 2018-01-10 stsp *size = sb.st_size;
94 0a0a3048 2018-01-10 stsp const struct got_error *
95 0a0a3048 2018-01-10 stsp got_packidx_open(struct got_packidx_v2_hdr **packidx, const char *path)
97 0a0a3048 2018-01-10 stsp struct got_packidx_v2_hdr *p;
99 0a0a3048 2018-01-10 stsp const struct got_error *err = NULL;
100 0a0a3048 2018-01-10 stsp size_t n, nobj, packfile_size;
101 0ebaf008 2018-01-10 stsp SHA1_CTX ctx;
102 0ebaf008 2018-01-10 stsp uint8_t sha1[SHA1_DIGEST_LENGTH];
104 0ebaf008 2018-01-10 stsp SHA1Init(&ctx);
106 0a0a3048 2018-01-10 stsp f = fopen(path, "rb");
107 0a0a3048 2018-01-10 stsp if (f == NULL)
108 0a0a3048 2018-01-10 stsp return got_error(GOT_ERR_BAD_PATH);
110 0a0a3048 2018-01-10 stsp err = get_packfile_size(&packfile_size, path);
112 0a0a3048 2018-01-10 stsp return err;
114 0a0a3048 2018-01-10 stsp p = calloc(1, sizeof(*p));
115 0a0a3048 2018-01-10 stsp if (p == NULL) {
116 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_NO_MEM);
120 0a0a3048 2018-01-10 stsp n = fread(&p->magic, sizeof(p->magic), 1, f);
121 0a0a3048 2018-01-10 stsp if (n != 1) {
122 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
126 0a0a3048 2018-01-10 stsp if (betoh32(p->magic) != GOT_PACKIDX_V2_MAGIC) {
127 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
131 0ebaf008 2018-01-10 stsp SHA1Update(&ctx, (uint8_t *)&p->magic, sizeof(p->magic));
133 0a0a3048 2018-01-10 stsp n = fread(&p->version, sizeof(p->version), 1, f);
134 0a0a3048 2018-01-10 stsp if (n != 1) {
135 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
139 0a0a3048 2018-01-10 stsp if (betoh32(p->version) != GOT_PACKIDX_VERSION) {
140 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_BAD_PACKIDX);
144 0ebaf008 2018-01-10 stsp SHA1Update(&ctx, (uint8_t *)&p->version, sizeof(p->version));
146 0a0a3048 2018-01-10 stsp n = fread(&p->fanout_table, sizeof(p->fanout_table), 1, f);
147 0a0a3048 2018-01-10 stsp if (n != 1) {
148 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
152 0a0a3048 2018-01-10 stsp err = verify_fanout_table(p->fanout_table);
156 0ebaf008 2018-01-10 stsp SHA1Update(&ctx, (uint8_t *)p->fanout_table, sizeof(p->fanout_table));
158 0a0a3048 2018-01-10 stsp nobj = betoh32(p->fanout_table[0xff]);
160 0a0a3048 2018-01-10 stsp p->sorted_ids = calloc(nobj, sizeof(*p->sorted_ids));
161 0a0a3048 2018-01-10 stsp if (p->sorted_ids == NULL) {
162 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_NO_MEM);
166 0a0a3048 2018-01-10 stsp n = fread(p->sorted_ids, sizeof(*p->sorted_ids), nobj, f);
167 0a0a3048 2018-01-10 stsp if (n != nobj) {
168 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
172 0ebaf008 2018-01-10 stsp SHA1Update(&ctx, (uint8_t *)p->sorted_ids,
173 0ebaf008 2018-01-10 stsp nobj * sizeof(*p->sorted_ids));
175 a1fd68d8 2018-01-12 stsp p->crc32 = calloc(nobj, sizeof(*p->crc32));
176 a1fd68d8 2018-01-12 stsp if (p->crc32 == NULL) {
177 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_NO_MEM);
181 a1fd68d8 2018-01-12 stsp n = fread(p->crc32, sizeof(*p->crc32), nobj, f);
182 0a0a3048 2018-01-10 stsp if (n != nobj) {
183 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
187 a1fd68d8 2018-01-12 stsp SHA1Update(&ctx, (uint8_t *)p->crc32, nobj * sizeof(*p->crc32));
189 a1fd68d8 2018-01-12 stsp p->offsets = calloc(nobj, sizeof(*p->offsets));
190 a1fd68d8 2018-01-12 stsp if (p->offsets == NULL) {
191 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_NO_MEM);
195 a1fd68d8 2018-01-12 stsp n = fread(p->offsets, sizeof(*p->offsets), nobj, f);
196 0a0a3048 2018-01-10 stsp if (n != nobj) {
197 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
201 a1fd68d8 2018-01-12 stsp SHA1Update(&ctx, (uint8_t *)p->offsets, nobj * sizeof(*p->offsets));
203 0a0a3048 2018-01-10 stsp /* Large file offsets are contained only in files > 2GB. */
204 b0517dd0 2018-01-10 stsp if (packfile_size <= 0x80000000)
205 0a0a3048 2018-01-10 stsp goto checksum;
207 0a0a3048 2018-01-10 stsp p->large_offsets = calloc(nobj, sizeof(*p->large_offsets));
208 0a0a3048 2018-01-10 stsp if (p->large_offsets == NULL) {
209 0a0a3048 2018-01-10 stsp err = got_error(GOT_ERR_NO_MEM);
213 0a0a3048 2018-01-10 stsp n = fread(p->large_offsets, sizeof(*p->large_offsets), nobj, f);
214 0a0a3048 2018-01-10 stsp if (n != nobj) {
215 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
219 0ebaf008 2018-01-10 stsp SHA1Update(&ctx, (uint8_t*)p->large_offsets,
220 0ebaf008 2018-01-10 stsp nobj * sizeof(*p->large_offsets));
223 0a0a3048 2018-01-10 stsp n = fread(&p->trailer, sizeof(p->trailer), 1, f);
224 0a0a3048 2018-01-10 stsp if (n != 1) {
225 8251fdbc 2018-01-12 stsp err = got_ferror(f, GOT_ERR_BAD_PACKIDX);
229 a1fd68d8 2018-01-12 stsp SHA1Update(&ctx, p->trailer.packfile_sha1, SHA1_DIGEST_LENGTH);
230 0ebaf008 2018-01-10 stsp SHA1Final(sha1, &ctx);
231 a1fd68d8 2018-01-12 stsp if (memcmp(p->trailer.packidx_sha1, sha1, SHA1_DIGEST_LENGTH) != 0)
232 0ebaf008 2018-01-10 stsp err = got_error(GOT_ERR_PACKIDX_CSUM);
236 0a0a3048 2018-01-10 stsp got_packidx_close(p);
238 0a0a3048 2018-01-10 stsp *packidx = p;
239 0a0a3048 2018-01-10 stsp return err;
243 0a0a3048 2018-01-10 stsp got_packidx_close(struct got_packidx_v2_hdr *packidx)
245 0a0a3048 2018-01-10 stsp free(packidx->sorted_ids);
246 0a0a3048 2018-01-10 stsp free(packidx->offsets);
247 0a0a3048 2018-01-10 stsp free(packidx->crc32);
248 0a0a3048 2018-01-10 stsp free(packidx->large_offsets);
249 0a0a3048 2018-01-10 stsp free(packidx);
253 a1fd68d8 2018-01-12 stsp is_packidx_filename(const char *name, size_t len)
255 a1fd68d8 2018-01-12 stsp if (len != GOT_PACKIDX_NAMELEN)
258 a1fd68d8 2018-01-12 stsp if (strncmp(name, GOT_PACK_PREFIX, strlen(GOT_PACK_PREFIX)) != 0)
261 a1fd68d8 2018-01-12 stsp if (strcmp(name + strlen(GOT_PACK_PREFIX) +
262 a1fd68d8 2018-01-12 stsp SHA1_DIGEST_STRING_LENGTH - 1, GOT_PACKIDX_SUFFIX) != 0)
268 a1fd68d8 2018-01-12 stsp static off_t
269 a1fd68d8 2018-01-12 stsp get_object_offset(struct got_packidx_v2_hdr *packidx, int idx)
271 a1fd68d8 2018-01-12 stsp uint32_t totobj = betoh32(packidx->fanout_table[0xff]);
272 a1fd68d8 2018-01-12 stsp uint32_t offset = betoh32(packidx->offsets[idx]);
273 a1fd68d8 2018-01-12 stsp if (offset & GOT_PACKIDX_OFFSET_VAL_IS_LARGE_IDX) {
274 a1fd68d8 2018-01-12 stsp uint64_t loffset;
275 a1fd68d8 2018-01-12 stsp idx = offset & GOT_PACKIDX_OFFSET_VAL_MASK;
276 a1fd68d8 2018-01-12 stsp if (idx < 0 || idx > totobj || packidx->large_offsets == NULL)
278 a1fd68d8 2018-01-12 stsp loffset = betoh64(packidx->large_offsets[idx]);
279 a1fd68d8 2018-01-12 stsp return (loffset > INT64_MAX ? -1 : (off_t)loffset);
281 a1fd68d8 2018-01-12 stsp return (off_t)(offset & GOT_PACKIDX_OFFSET_VAL_MASK);
285 a1fd68d8 2018-01-12 stsp get_object_idx(struct got_packidx_v2_hdr *packidx, struct got_object_id *id)
287 a1fd68d8 2018-01-12 stsp u_int8_t id0 = id->sha1[0];
288 a1fd68d8 2018-01-12 stsp uint32_t totobj = betoh32(packidx->fanout_table[0xff]);
291 a1fd68d8 2018-01-12 stsp if (id0 > 0)
292 a1fd68d8 2018-01-12 stsp i = betoh32(packidx->fanout_table[id0 - 1]);
294 a1fd68d8 2018-01-12 stsp while (i < totobj) {
295 a1fd68d8 2018-01-12 stsp struct got_object_id *oid = &packidx->sorted_ids[i++];
296 a1fd68d8 2018-01-12 stsp uint32_t offset;
297 2b2ca9f0 2018-01-13 stsp int cmp = got_object_id_cmp(id, oid);
299 2b2ca9f0 2018-01-13 stsp if (cmp < 0)
301 2b2ca9f0 2018-01-13 stsp if (cmp > 0)
310 a1fd68d8 2018-01-12 stsp const struct got_error *
311 a1fd68d8 2018-01-12 stsp read_packfile_hdr(FILE *f, struct got_packidx_v2_hdr *packidx)
313 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
314 a1fd68d8 2018-01-12 stsp uint32_t totobj = betoh32(packidx->fanout_table[0xff]);
315 a1fd68d8 2018-01-12 stsp struct got_packfile_hdr hdr;
318 a1fd68d8 2018-01-12 stsp n = fread(&hdr, sizeof(hdr), 1, f);
319 a1fd68d8 2018-01-12 stsp if (n != 1)
320 8251fdbc 2018-01-12 stsp return got_ferror(f, GOT_ERR_BAD_PACKIDX);
322 a1fd68d8 2018-01-12 stsp if (betoh32(hdr.signature) != GOT_PACKFILE_SIGNATURE ||
323 a1fd68d8 2018-01-12 stsp betoh32(hdr.version) != GOT_PACKFILE_VERSION ||
324 a1fd68d8 2018-01-12 stsp betoh32(hdr.nobjects) != totobj)
325 a1fd68d8 2018-01-12 stsp err = got_error(GOT_ERR_BAD_PACKFILE);
327 a1fd68d8 2018-01-12 stsp return err;
330 a1fd68d8 2018-01-12 stsp static const struct got_error *
331 a487c1d0 2018-01-14 stsp dump_plain_object(FILE *infile, uint8_t type, uint64_t size, FILE *outfile)
333 a487c1d0 2018-01-14 stsp const char *type_tag = got_object_get_type_tag(type);
336 a487c1d0 2018-01-14 stsp if (type_tag == NULL)
337 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_OBJ_TYPE);
339 a487c1d0 2018-01-14 stsp fprintf(outfile, "%s %llu", type_tag, size);
340 a487c1d0 2018-01-14 stsp fputc('\0', outfile);
342 a487c1d0 2018-01-14 stsp while (size > 0) {
343 a487c1d0 2018-01-14 stsp uint8_t data[2048];
344 a487c1d0 2018-01-14 stsp size_t len = MIN(size, sizeof(data));
346 a487c1d0 2018-01-14 stsp n = fread(data, len, 1, infile);
347 a487c1d0 2018-01-14 stsp if (n != 1)
348 a487c1d0 2018-01-14 stsp return got_ferror(infile, GOT_ERR_BAD_PACKIDX);
350 a487c1d0 2018-01-14 stsp n = fwrite(data, len, 1, outfile);
351 a487c1d0 2018-01-14 stsp if (n != 1)
352 a487c1d0 2018-01-14 stsp return got_ferror(outfile, GOT_ERR_BAD_PACKIDX);
354 a487c1d0 2018-01-14 stsp size -= len;
357 a487c1d0 2018-01-14 stsp return NULL;
360 a487c1d0 2018-01-14 stsp static const struct got_error *
361 a487c1d0 2018-01-14 stsp decode_type_and_size(uint8_t *type, uint64_t *size, FILE *packfile)
363 a487c1d0 2018-01-14 stsp uint8_t t = 0;
364 a487c1d0 2018-01-14 stsp uint64_t s = 0;
365 a487c1d0 2018-01-14 stsp uint8_t sizeN;
370 a1fd68d8 2018-01-12 stsp /* We do not support size values which don't fit in 64 bit. */
372 a487c1d0 2018-01-14 stsp return got_error(GOT_ERR_NO_SPACE);
374 a1fd68d8 2018-01-12 stsp n = fread(&sizeN, sizeof(sizeN), 1, packfile);
375 a487c1d0 2018-01-14 stsp if (n != 1)
376 a487c1d0 2018-01-14 stsp return got_ferror(packfile, GOT_ERR_BAD_PACKIDX);
378 a1fd68d8 2018-01-12 stsp if (i == 0) {
379 a487c1d0 2018-01-14 stsp t = (sizeN & GOT_PACK_OBJ_SIZE0_TYPE_MASK) >>
380 a1fd68d8 2018-01-12 stsp GOT_PACK_OBJ_SIZE0_TYPE_MASK_SHIFT;
381 a487c1d0 2018-01-14 stsp s = (sizeN & GOT_PACK_OBJ_SIZE0_VAL_MASK);
383 a1fd68d8 2018-01-12 stsp size_t shift = 4 + 7 * (i - 1);
384 a487c1d0 2018-01-14 stsp s |= ((sizeN & GOT_PACK_OBJ_SIZE_VAL_MASK) << shift);
387 a1fd68d8 2018-01-12 stsp } while (sizeN & GOT_PACK_OBJ_SIZE_MORE);
391 a487c1d0 2018-01-14 stsp return NULL;
394 a487c1d0 2018-01-14 stsp static const struct got_error *
395 a487c1d0 2018-01-14 stsp dump_packed_object(FILE **f, FILE *packfile, off_t offset)
397 a487c1d0 2018-01-14 stsp const struct got_error *err = NULL;
398 a487c1d0 2018-01-14 stsp const char *template = "/tmp/got.XXXXXXXXXX";
399 a487c1d0 2018-01-14 stsp uint8_t type;
400 a487c1d0 2018-01-14 stsp uint64_t size;
401 a487c1d0 2018-01-14 stsp FILE *outfile = NULL;
403 a487c1d0 2018-01-14 stsp *f = got_opentemp();
404 a487c1d0 2018-01-14 stsp if (*f == NULL) {
405 a487c1d0 2018-01-14 stsp err = got_error(GOT_ERR_FILE_OPEN);
409 a487c1d0 2018-01-14 stsp if (fseeko(packfile, offset, SEEK_SET) != 0) {
410 a487c1d0 2018-01-14 stsp err = got_error_from_errno();
414 a487c1d0 2018-01-14 stsp err = decode_type_and_size(&type, &size, packfile);
418 a487c1d0 2018-01-14 stsp switch (type) {
419 a487c1d0 2018-01-14 stsp case GOT_OBJ_TYPE_COMMIT:
420 a487c1d0 2018-01-14 stsp case GOT_OBJ_TYPE_TREE:
421 a487c1d0 2018-01-14 stsp case GOT_OBJ_TYPE_BLOB:
422 a487c1d0 2018-01-14 stsp err = dump_plain_object(packfile, type, size, *f);
424 a487c1d0 2018-01-14 stsp case GOT_OBJ_TYPE_REF_DELTA:
425 a487c1d0 2018-01-14 stsp case GOT_OBJ_TYPE_TAG:
426 a487c1d0 2018-01-14 stsp case GOT_OBJ_TYPE_OFFSET_DELTA:
428 a487c1d0 2018-01-14 stsp err = got_error(GOT_ERR_NOT_IMPL);
432 a1fd68d8 2018-01-12 stsp rewind(*f);
434 a1fd68d8 2018-01-12 stsp if (err && *f)
435 a1fd68d8 2018-01-12 stsp fclose(*f);
436 a1fd68d8 2018-01-12 stsp return err;
439 a1fd68d8 2018-01-12 stsp static const struct got_error *
440 a1fd68d8 2018-01-12 stsp extract_object(FILE **f, const char *path_packdir,
441 a1fd68d8 2018-01-12 stsp struct got_packidx_v2_hdr *packidx, struct got_object_id *id)
443 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
444 a1fd68d8 2018-01-12 stsp int idx = get_object_idx(packidx, id);
445 a1fd68d8 2018-01-12 stsp off_t offset;
446 a1fd68d8 2018-01-12 stsp char *path_packfile;
447 a1fd68d8 2018-01-12 stsp FILE *packfile;
448 a1fd68d8 2018-01-12 stsp char hex[SHA1_DIGEST_STRING_LENGTH];
449 a1fd68d8 2018-01-12 stsp char *sha1str;
452 a1fd68d8 2018-01-12 stsp if (idx == -1) /* object not found in pack index */
453 a1fd68d8 2018-01-12 stsp return NULL;
455 a1fd68d8 2018-01-12 stsp offset = get_object_offset(packidx, idx);
456 a1fd68d8 2018-01-12 stsp if (offset == (uint64_t)-1)
457 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_BAD_PACKIDX);
459 a1fd68d8 2018-01-12 stsp sha1str = got_sha1_digest_to_str(packidx->trailer.packfile_sha1,
460 a1fd68d8 2018-01-12 stsp hex, sizeof(hex));
461 a1fd68d8 2018-01-12 stsp if (sha1str == NULL)
462 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_PACKIDX_CSUM);
464 a1fd68d8 2018-01-12 stsp if (asprintf(&path_packfile, "%s/%s%s%s", path_packdir,
465 a1fd68d8 2018-01-12 stsp GOT_PACK_PREFIX, sha1str, GOT_PACKFILE_SUFFIX) == -1)
466 a1fd68d8 2018-01-12 stsp return got_error(GOT_ERR_NO_MEM);
468 a1fd68d8 2018-01-12 stsp packfile = fopen(path_packfile, "rb");
469 a1fd68d8 2018-01-12 stsp if (packfile == NULL) {
470 f334529e 2018-01-12 stsp err = got_error_from_errno();
474 a1fd68d8 2018-01-12 stsp err = read_packfile_hdr(packfile, packidx);
478 a1fd68d8 2018-01-12 stsp printf("Dumping object at offset %llu\n", offset);
479 a1fd68d8 2018-01-12 stsp err = dump_packed_object(f, packfile, offset);
484 a1fd68d8 2018-01-12 stsp free(path_packfile);
485 f334529e 2018-01-12 stsp if (packfile && fclose(packfile) == -1 && err == 0)
486 f334529e 2018-01-12 stsp err = got_error_from_errno();
487 a1fd68d8 2018-01-12 stsp return err;
490 a1fd68d8 2018-01-12 stsp const struct got_error *
491 a1fd68d8 2018-01-12 stsp got_packfile_extract_object(FILE **f, struct got_object_id *id,
492 a1fd68d8 2018-01-12 stsp struct got_repository *repo)
494 a1fd68d8 2018-01-12 stsp const struct got_error *err = NULL;
495 a1fd68d8 2018-01-12 stsp DIR *packdir = NULL;
496 a1fd68d8 2018-01-12 stsp struct dirent *dent;
497 a1fd68d8 2018-01-12 stsp char *path_packdir = got_repo_get_path_objects_pack(repo);
499 a1fd68d8 2018-01-12 stsp if (path_packdir == NULL) {
500 a1fd68d8 2018-01-12 stsp err = got_error(GOT_ERR_NO_MEM);
504 a1fd68d8 2018-01-12 stsp packdir = opendir(path_packdir);
505 a1fd68d8 2018-01-12 stsp if (packdir == NULL) {
506 f334529e 2018-01-12 stsp err = got_error_from_errno();
510 a1fd68d8 2018-01-12 stsp while ((dent = readdir(packdir)) != NULL) {
511 a1fd68d8 2018-01-12 stsp struct got_packidx_v2_hdr *packidx;
512 a1fd68d8 2018-01-12 stsp char *path_packidx, *path_object;
514 a1fd68d8 2018-01-12 stsp if (!is_packidx_filename(dent->d_name, dent->d_namlen))
517 a1fd68d8 2018-01-12 stsp if (asprintf(&path_packidx, "%s/%s", path_packdir,
518 a1fd68d8 2018-01-12 stsp dent->d_name) == -1) {
519 a1fd68d8 2018-01-12 stsp err = got_error(GOT_ERR_NO_MEM);
523 a1fd68d8 2018-01-12 stsp err = got_packidx_open(&packidx, path_packidx);
524 a1fd68d8 2018-01-12 stsp free(path_packidx);
528 a1fd68d8 2018-01-12 stsp err = extract_object(f, path_packdir, packidx, id);
531 a1fd68d8 2018-01-12 stsp if (*f != NULL)
536 a1fd68d8 2018-01-12 stsp free(path_packdir);
537 f334529e 2018-01-12 stsp if (packdir && closedir(packdir) != 0 && err == 0)
538 f334529e 2018-01-12 stsp err = got_error_from_errno();
539 a1fd68d8 2018-01-12 stsp return err;
