]>
Commit | Line | Data |
---|---|---|
64413630 | 1 | #include "builtin.h" |
bad50dc8 | 2 | #include "cache.h" |
74536958 | 3 | #include "object.h" |
8ee378a0 | 4 | #include "delta.h" |
a733cb60 | 5 | #include "pack.h" |
8e440259 PE |
6 | #include "blob.h" |
7 | #include "commit.h" | |
8 | #include "tag.h" | |
9 | #include "tree.h" | |
b41860bf | 10 | #include "tree-walk.h" |
96a02f8f | 11 | #include "progress.h" |
2add1e6d | 12 | #include "decorate.h" |
b41860bf | 13 | #include "fsck.h" |
bad50dc8 | 14 | |
b41860bf | 15 | static int dry_run, quiet, recover, has_errors, strict; |
f18d244a | 16 | static const char unpack_usage[] = "git unpack-objects [-n] [-q] [-r] [--strict] < pack-file"; |
bad50dc8 | 17 | |
67e5a5ec LT |
18 | /* We always read in 4kB chunks. */ |
19 | static unsigned char buffer[4096]; | |
d7dd0223 NP |
20 | static unsigned int offset, len; |
21 | static off_t consumed_bytes; | |
9126f009 | 22 | static git_SHA_CTX ctx; |
22410549 | 23 | static struct fsck_options fsck_options = FSCK_OPTIONS_STRICT; |
bad50dc8 | 24 | |
f2898cfa JH |
25 | /* |
26 | * When running under --strict mode, objects whose reachability are | |
27 | * suspect are kept in core without getting written in the object | |
28 | * store. | |
29 | */ | |
2add1e6d MK |
30 | struct obj_buffer { |
31 | char *buffer; | |
32 | unsigned long size; | |
33 | }; | |
34 | ||
35 | static struct decoration obj_decorate; | |
36 | ||
37 | static struct obj_buffer *lookup_object_buffer(struct object *base) | |
38 | { | |
39 | return lookup_decoration(&obj_decorate, base); | |
40 | } | |
41 | ||
b41860bf MK |
42 | static void add_object_buffer(struct object *object, char *buffer, unsigned long size) |
43 | { | |
44 | struct obj_buffer *obj; | |
45 | obj = xcalloc(1, sizeof(struct obj_buffer)); | |
46 | obj->buffer = buffer; | |
47 | obj->size = size; | |
48 | if (add_decoration(&obj_decorate, object, obj)) | |
49 | die("object %s tried to add buffer twice!", sha1_to_hex(object->sha1)); | |
50 | } | |
51 | ||
67e5a5ec LT |
52 | /* |
53 | * Make sure at least "min" bytes are available in the buffer, and | |
54 | * return the pointer to the buffer. | |
55 | */ | |
79a65697 | 56 | static void *fill(int min) |
67e5a5ec LT |
57 | { |
58 | if (min <= len) | |
59 | return buffer + offset; | |
67e5a5ec LT |
60 | if (min > sizeof(buffer)) |
61 | die("cannot fill %d bytes", min); | |
62 | if (offset) { | |
9126f009 | 63 | git_SHA1_Update(&ctx, buffer, offset); |
79a65697 | 64 | memmove(buffer, buffer + offset, len); |
67e5a5ec LT |
65 | offset = 0; |
66 | } | |
67 | do { | |
8a912bcb | 68 | ssize_t ret = xread(0, buffer + len, sizeof(buffer) - len); |
67e5a5ec LT |
69 | if (ret <= 0) { |
70 | if (!ret) | |
71 | die("early EOF"); | |
d824cbba | 72 | die_errno("read error on input"); |
67e5a5ec LT |
73 | } |
74 | len += ret; | |
75 | } while (len < min); | |
76 | return buffer; | |
77 | } | |
74536958 | 78 | |
67e5a5ec LT |
79 | static void use(int bytes) |
80 | { | |
81 | if (bytes > len) | |
82 | die("used more bytes than were available"); | |
83 | len -= bytes; | |
84 | offset += bytes; | |
d7dd0223 NP |
85 | |
86 | /* make sure off_t is sufficiently large not to wrap */ | |
c03c8315 | 87 | if (signed_add_overflows(consumed_bytes, bytes)) |
d7dd0223 | 88 | die("pack too large for current definition of off_t"); |
209c554a | 89 | consumed_bytes += bytes; |
67e5a5ec | 90 | } |
bad50dc8 | 91 | |
67e5a5ec | 92 | static void *get_data(unsigned long size) |
bad50dc8 | 93 | { |
ef49a7a0 | 94 | git_zstream stream; |
a1e920a0 | 95 | void *buf = xmallocz(size); |
67e5a5ec | 96 | |
67e5a5ec LT |
97 | memset(&stream, 0, sizeof(stream)); |
98 | ||
99 | stream.next_out = buf; | |
100 | stream.avail_out = size; | |
101 | stream.next_in = fill(1); | |
102 | stream.avail_in = len; | |
39c68542 | 103 | git_inflate_init(&stream); |
67e5a5ec LT |
104 | |
105 | for (;;) { | |
39c68542 | 106 | int ret = git_inflate(&stream, 0); |
67e5a5ec LT |
107 | use(len - stream.avail_in); |
108 | if (stream.total_out == size && ret == Z_STREAM_END) | |
109 | break; | |
f986f2c8 | 110 | if (ret != Z_OK) { |
82247e9b | 111 | error("inflate returned %d", ret); |
f986f2c8 JH |
112 | free(buf); |
113 | buf = NULL; | |
3b67d291 | 114 | if (!recover) |
f986f2c8 JH |
115 | exit(1); |
116 | has_errors = 1; | |
117 | break; | |
118 | } | |
67e5a5ec LT |
119 | stream.next_in = fill(1); |
120 | stream.avail_in = len; | |
121 | } | |
39c68542 | 122 | git_inflate_end(&stream); |
67e5a5ec | 123 | return buf; |
bad50dc8 LT |
124 | } |
125 | ||
67e5a5ec LT |
126 | struct delta_info { |
127 | unsigned char base_sha1[20]; | |
d7dd0223 NP |
128 | unsigned nr; |
129 | off_t base_offset; | |
67e5a5ec LT |
130 | unsigned long size; |
131 | void *delta; | |
132 | struct delta_info *next; | |
133 | }; | |
134 | ||
135 | static struct delta_info *delta_list; | |
136 | ||
209c554a | 137 | static void add_delta_to_list(unsigned nr, unsigned const char *base_sha1, |
d7dd0223 | 138 | off_t base_offset, |
209c554a | 139 | void *delta, unsigned long size) |
bad50dc8 | 140 | { |
67e5a5ec | 141 | struct delta_info *info = xmalloc(sizeof(*info)); |
bad50dc8 | 142 | |
e702496e | 143 | hashcpy(info->base_sha1, base_sha1); |
209c554a | 144 | info->base_offset = base_offset; |
67e5a5ec LT |
145 | info->size = size; |
146 | info->delta = delta; | |
209c554a | 147 | info->nr = nr; |
67e5a5ec LT |
148 | info->next = delta_list; |
149 | delta_list = info; | |
bad50dc8 LT |
150 | } |
151 | ||
209c554a | 152 | struct obj_info { |
d7dd0223 | 153 | off_t offset; |
209c554a | 154 | unsigned char sha1[20]; |
b41860bf | 155 | struct object *obj; |
209c554a NP |
156 | }; |
157 | ||
b41860bf MK |
158 | #define FLAG_OPEN (1u<<20) |
159 | #define FLAG_WRITTEN (1u<<21) | |
160 | ||
209c554a | 161 | static struct obj_info *obj_list; |
2af202be | 162 | static unsigned nr_objects; |
b41860bf | 163 | |
f2898cfa JH |
164 | /* |
165 | * Called only from check_object() after it verified this object | |
166 | * is Ok. | |
167 | */ | |
90a398bb | 168 | static void write_cached_object(struct object *obj, struct obj_buffer *obj_buf) |
b41860bf MK |
169 | { |
170 | unsigned char sha1[20]; | |
90a398bb | 171 | |
b41860bf MK |
172 | if (write_sha1_file(obj_buf->buffer, obj_buf->size, typename(obj->type), sha1) < 0) |
173 | die("failed to write object %s", sha1_to_hex(obj->sha1)); | |
174 | obj->flags |= FLAG_WRITTEN; | |
175 | } | |
176 | ||
f2898cfa JH |
177 | /* |
178 | * At the very end of the processing, write_rest() scans the objects | |
179 | * that have reachability requirements and calls this function. | |
180 | * Verify its reachability and validity recursively and write it out. | |
181 | */ | |
22410549 | 182 | static int check_object(struct object *obj, int type, void *data, struct fsck_options *options) |
b41860bf | 183 | { |
90a398bb JS |
184 | struct obj_buffer *obj_buf; |
185 | ||
b41860bf | 186 | if (!obj) |
9a217391 | 187 | return 1; |
b41860bf MK |
188 | |
189 | if (obj->flags & FLAG_WRITTEN) | |
9a217391 | 190 | return 0; |
b41860bf MK |
191 | |
192 | if (type != OBJ_ANY && obj->type != type) | |
193 | die("object type mismatch"); | |
194 | ||
195 | if (!(obj->flags & FLAG_OPEN)) { | |
196 | unsigned long size; | |
197 | int type = sha1_object_info(obj->sha1, &size); | |
198 | if (type != obj->type || type <= 0) | |
199 | die("object of unexpected type"); | |
200 | obj->flags |= FLAG_WRITTEN; | |
9a217391 | 201 | return 0; |
b41860bf MK |
202 | } |
203 | ||
90a398bb JS |
204 | obj_buf = lookup_object_buffer(obj); |
205 | if (!obj_buf) | |
206 | die("Whoops! Cannot find object '%s'", sha1_to_hex(obj->sha1)); | |
22410549 | 207 | if (fsck_object(obj, obj_buf->buffer, obj_buf->size, &fsck_options)) |
b41860bf | 208 | die("Error in object"); |
22410549 JS |
209 | fsck_options.walk = check_object; |
210 | if (fsck_walk(obj, NULL, &fsck_options)) | |
b41860bf | 211 | die("Error on reachable objects of %s", sha1_to_hex(obj->sha1)); |
90a398bb | 212 | write_cached_object(obj, obj_buf); |
9a217391 | 213 | return 0; |
b41860bf MK |
214 | } |
215 | ||
216 | static void write_rest(void) | |
217 | { | |
218 | unsigned i; | |
9a217391 JH |
219 | for (i = 0; i < nr_objects; i++) { |
220 | if (obj_list[i].obj) | |
22410549 | 221 | check_object(obj_list[i].obj, OBJ_ANY, NULL, NULL); |
9a217391 | 222 | } |
b41860bf | 223 | } |
67e5a5ec | 224 | |
21666f1a NP |
225 | static void added_object(unsigned nr, enum object_type type, |
226 | void *data, unsigned long size); | |
209c554a | 227 | |
f2898cfa JH |
228 | /* |
229 | * Write out nr-th object from the list, now we know the contents | |
230 | * of it. Under --strict, this buffers structured objects in-core, | |
231 | * to be checked at the end. | |
232 | */ | |
21666f1a NP |
233 | static void write_object(unsigned nr, enum object_type type, |
234 | void *buf, unsigned long size) | |
cca7081a | 235 | { |
b41860bf MK |
236 | if (!strict) { |
237 | if (write_sha1_file(buf, size, typename(type), obj_list[nr].sha1) < 0) | |
238 | die("failed to write object"); | |
f2898cfa | 239 | added_object(nr, type, buf, size); |
b41860bf | 240 | free(buf); |
f2898cfa | 241 | obj_list[nr].obj = NULL; |
b41860bf MK |
242 | } else if (type == OBJ_BLOB) { |
243 | struct blob *blob; | |
244 | if (write_sha1_file(buf, size, typename(type), obj_list[nr].sha1) < 0) | |
245 | die("failed to write object"); | |
f2898cfa | 246 | added_object(nr, type, buf, size); |
b41860bf MK |
247 | free(buf); |
248 | ||
249 | blob = lookup_blob(obj_list[nr].sha1); | |
250 | if (blob) | |
251 | blob->object.flags |= FLAG_WRITTEN; | |
252 | else | |
253 | die("invalid blob object"); | |
f2898cfa | 254 | obj_list[nr].obj = NULL; |
b41860bf MK |
255 | } else { |
256 | struct object *obj; | |
257 | int eaten; | |
258 | hash_sha1_file(buf, size, typename(type), obj_list[nr].sha1); | |
f2898cfa | 259 | added_object(nr, type, buf, size); |
b41860bf MK |
260 | obj = parse_object_buffer(obj_list[nr].sha1, type, size, buf, &eaten); |
261 | if (!obj) | |
262 | die("invalid %s", typename(type)); | |
b41860bf MK |
263 | add_object_buffer(obj, buf, size); |
264 | obj->flags |= FLAG_OPEN; | |
265 | obj_list[nr].obj = obj; | |
266 | } | |
cca7081a LT |
267 | } |
268 | ||
21666f1a | 269 | static void resolve_delta(unsigned nr, enum object_type type, |
f986f2c8 JH |
270 | void *base, unsigned long base_size, |
271 | void *delta, unsigned long delta_size) | |
bad50dc8 | 272 | { |
67e5a5ec LT |
273 | void *result; |
274 | unsigned long result_size; | |
bad50dc8 | 275 | |
67e5a5ec LT |
276 | result = patch_delta(base, base_size, |
277 | delta, delta_size, | |
278 | &result_size); | |
279 | if (!result) | |
280 | die("failed to apply delta"); | |
281 | free(delta); | |
21666f1a | 282 | write_object(nr, type, result, result_size); |
bad50dc8 LT |
283 | } |
284 | ||
f2898cfa JH |
285 | /* |
286 | * We now know the contents of an object (which is nr-th in the pack); | |
287 | * resolve all the deltified objects that are based on it. | |
288 | */ | |
21666f1a NP |
289 | static void added_object(unsigned nr, enum object_type type, |
290 | void *data, unsigned long size) | |
74536958 | 291 | { |
67e5a5ec LT |
292 | struct delta_info **p = &delta_list; |
293 | struct delta_info *info; | |
294 | ||
295 | while ((info = *p) != NULL) { | |
209c554a NP |
296 | if (!hashcmp(info->base_sha1, obj_list[nr].sha1) || |
297 | info->base_offset == obj_list[nr].offset) { | |
67e5a5ec LT |
298 | *p = info->next; |
299 | p = &delta_list; | |
209c554a NP |
300 | resolve_delta(info->nr, type, data, size, |
301 | info->delta, info->size); | |
67e5a5ec LT |
302 | free(info); |
303 | continue; | |
304 | } | |
305 | p = &info->next; | |
306 | } | |
307 | } | |
308 | ||
21666f1a | 309 | static void unpack_non_delta_entry(enum object_type type, unsigned long size, |
209c554a | 310 | unsigned nr) |
67e5a5ec LT |
311 | { |
312 | void *buf = get_data(size); | |
8ee378a0 | 313 | |
f986f2c8 | 314 | if (!dry_run && buf) |
21666f1a | 315 | write_object(nr, type, buf, size); |
b41860bf MK |
316 | else |
317 | free(buf); | |
8ee378a0 JH |
318 | } |
319 | ||
f2898cfa JH |
320 | static int resolve_against_held(unsigned nr, const unsigned char *base, |
321 | void *delta_data, unsigned long delta_size) | |
322 | { | |
323 | struct object *obj; | |
324 | struct obj_buffer *obj_buffer; | |
325 | obj = lookup_object(base); | |
326 | if (!obj) | |
327 | return 0; | |
328 | obj_buffer = lookup_object_buffer(obj); | |
329 | if (!obj_buffer) | |
330 | return 0; | |
331 | resolve_delta(nr, obj->type, obj_buffer->buffer, | |
332 | obj_buffer->size, delta_data, delta_size); | |
333 | return 1; | |
334 | } | |
335 | ||
21666f1a | 336 | static void unpack_delta_entry(enum object_type type, unsigned long delta_size, |
209c554a | 337 | unsigned nr) |
8ee378a0 | 338 | { |
67e5a5ec LT |
339 | void *delta_data, *base; |
340 | unsigned long base_size; | |
67e5a5ec | 341 | unsigned char base_sha1[20]; |
8ee378a0 | 342 | |
21666f1a | 343 | if (type == OBJ_REF_DELTA) { |
209c554a NP |
344 | hashcpy(base_sha1, fill(20)); |
345 | use(20); | |
346 | delta_data = get_data(delta_size); | |
347 | if (dry_run || !delta_data) { | |
348 | free(delta_data); | |
349 | return; | |
350 | } | |
f2898cfa JH |
351 | if (has_sha1_file(base_sha1)) |
352 | ; /* Ok we have this one */ | |
353 | else if (resolve_against_held(nr, base_sha1, | |
354 | delta_data, delta_size)) | |
355 | return; /* we are done */ | |
356 | else { | |
357 | /* cannot resolve yet --- queue it */ | |
209c554a NP |
358 | hashcpy(obj_list[nr].sha1, null_sha1); |
359 | add_delta_to_list(nr, base_sha1, 0, delta_data, delta_size); | |
360 | return; | |
361 | } | |
362 | } else { | |
363 | unsigned base_found = 0; | |
364 | unsigned char *pack, c; | |
d7dd0223 | 365 | off_t base_offset; |
209c554a | 366 | unsigned lo, mid, hi; |
c4fb06c0 | 367 | |
209c554a NP |
368 | pack = fill(1); |
369 | c = *pack; | |
370 | use(1); | |
371 | base_offset = c & 127; | |
372 | while (c & 128) { | |
373 | base_offset += 1; | |
8723f216 | 374 | if (!base_offset || MSB(base_offset, 7)) |
209c554a NP |
375 | die("offset value overflow for delta base object"); |
376 | pack = fill(1); | |
377 | c = *pack; | |
378 | use(1); | |
379 | base_offset = (base_offset << 7) + (c & 127); | |
380 | } | |
381 | base_offset = obj_list[nr].offset - base_offset; | |
d8f32556 NP |
382 | if (base_offset <= 0 || base_offset >= obj_list[nr].offset) |
383 | die("offset value out of bound for delta base object"); | |
8ee378a0 | 384 | |
209c554a NP |
385 | delta_data = get_data(delta_size); |
386 | if (dry_run || !delta_data) { | |
387 | free(delta_data); | |
388 | return; | |
389 | } | |
390 | lo = 0; | |
391 | hi = nr; | |
392 | while (lo < hi) { | |
393 | mid = (lo + hi)/2; | |
394 | if (base_offset < obj_list[mid].offset) { | |
395 | hi = mid; | |
396 | } else if (base_offset > obj_list[mid].offset) { | |
397 | lo = mid + 1; | |
398 | } else { | |
399 | hashcpy(base_sha1, obj_list[mid].sha1); | |
400 | base_found = !is_null_sha1(base_sha1); | |
401 | break; | |
402 | } | |
403 | } | |
404 | if (!base_found) { | |
f2898cfa JH |
405 | /* |
406 | * The delta base object is itself a delta that | |
407 | * has not been resolved yet. | |
408 | */ | |
209c554a NP |
409 | hashcpy(obj_list[nr].sha1, null_sha1); |
410 | add_delta_to_list(nr, null_sha1, base_offset, delta_data, delta_size); | |
411 | return; | |
2add1e6d MK |
412 | } |
413 | } | |
414 | ||
f2898cfa JH |
415 | if (resolve_against_held(nr, base_sha1, delta_data, delta_size)) |
416 | return; | |
209c554a | 417 | |
21666f1a | 418 | base = read_sha1_file(base_sha1, &type, &base_size); |
f986f2c8 JH |
419 | if (!base) { |
420 | error("failed to read delta-pack base object %s", | |
421 | sha1_to_hex(base_sha1)); | |
3b67d291 | 422 | if (!recover) |
f986f2c8 JH |
423 | exit(1); |
424 | has_errors = 1; | |
425 | return; | |
426 | } | |
209c554a | 427 | resolve_delta(nr, type, base, base_size, delta_data, delta_size); |
ee639140 | 428 | free(base); |
8ee378a0 JH |
429 | } |
430 | ||
96a02f8f | 431 | static void unpack_one(unsigned nr) |
8ee378a0 | 432 | { |
01247d87 | 433 | unsigned shift; |
48fb7deb LT |
434 | unsigned char *pack; |
435 | unsigned long size, c; | |
67e5a5ec | 436 | enum object_type type; |
74536958 | 437 | |
209c554a NP |
438 | obj_list[nr].offset = consumed_bytes; |
439 | ||
67e5a5ec LT |
440 | pack = fill(1); |
441 | c = *pack; | |
442 | use(1); | |
a733cb60 LT |
443 | type = (c >> 4) & 7; |
444 | size = (c & 15); | |
01247d87 | 445 | shift = 4; |
a733cb60 | 446 | while (c & 0x80) { |
67e5a5ec | 447 | pack = fill(1); |
209c554a | 448 | c = *pack; |
67e5a5ec | 449 | use(1); |
01247d87 LT |
450 | size += (c & 0x7f) << shift; |
451 | shift += 7; | |
a733cb60 | 452 | } |
96a02f8f | 453 | |
a733cb60 LT |
454 | switch (type) { |
455 | case OBJ_COMMIT: | |
456 | case OBJ_TREE: | |
457 | case OBJ_BLOB: | |
458 | case OBJ_TAG: | |
209c554a | 459 | unpack_non_delta_entry(type, size, nr); |
a733cb60 | 460 | return; |
eb32d236 | 461 | case OBJ_REF_DELTA: |
209c554a NP |
462 | case OBJ_OFS_DELTA: |
463 | unpack_delta_entry(type, size, nr); | |
a733cb60 | 464 | return; |
67e5a5ec | 465 | default: |
f986f2c8 JH |
466 | error("bad object type %d", type); |
467 | has_errors = 1; | |
3b67d291 | 468 | if (recover) |
f986f2c8 JH |
469 | return; |
470 | exit(1); | |
74536958 LT |
471 | } |
472 | } | |
473 | ||
74536958 LT |
474 | static void unpack_all(void) |
475 | { | |
67e5a5ec | 476 | int i; |
dc6a0757 | 477 | struct progress *progress = NULL; |
67e5a5ec | 478 | struct pack_header *hdr = fill(sizeof(struct pack_header)); |
b41860bf MK |
479 | |
480 | nr_objects = ntohl(hdr->hdr_entries); | |
67e5a5ec LT |
481 | |
482 | if (ntohl(hdr->hdr_signature) != PACK_SIGNATURE) | |
483 | die("bad pack file"); | |
d60fc1c8 | 484 | if (!pack_version_ok(hdr->hdr_version)) |
6e1c2344 RJ |
485 | die("unknown pack file version %"PRIu32, |
486 | ntohl(hdr->hdr_version)); | |
96a02f8f | 487 | use(sizeof(struct pack_header)); |
67e5a5ec | 488 | |
13aaf148 | 489 | if (!quiet) |
754dbc43 | 490 | progress = start_progress(_("Unpacking objects"), nr_objects); |
19d4b416 | 491 | obj_list = xcalloc(nr_objects, sizeof(*obj_list)); |
96a02f8f NP |
492 | for (i = 0; i < nr_objects; i++) { |
493 | unpack_one(i); | |
4d4fcc54 | 494 | display_progress(progress, i + 1); |
96a02f8f | 495 | } |
4d4fcc54 | 496 | stop_progress(&progress); |
96a02f8f | 497 | |
67e5a5ec LT |
498 | if (delta_list) |
499 | die("unresolved deltas left after unpacking"); | |
74536958 LT |
500 | } |
501 | ||
64413630 | 502 | int cmd_unpack_objects(int argc, const char **argv, const char *prefix) |
bad50dc8 LT |
503 | { |
504 | int i; | |
67e5a5ec | 505 | unsigned char sha1[20]; |
bad50dc8 | 506 | |
afc711b8 | 507 | check_replace_refs = 0; |
dae556bd | 508 | |
ef90d6d4 | 509 | git_config(git_default_config, NULL); |
53228a5f | 510 | |
476e8011 JH |
511 | quiet = !isatty(2); |
512 | ||
bad50dc8 LT |
513 | for (i = 1 ; i < argc; i++) { |
514 | const char *arg = argv[i]; | |
515 | ||
516 | if (*arg == '-') { | |
74536958 LT |
517 | if (!strcmp(arg, "-n")) { |
518 | dry_run = 1; | |
519 | continue; | |
520 | } | |
d36f7b80 LT |
521 | if (!strcmp(arg, "-q")) { |
522 | quiet = 1; | |
523 | continue; | |
524 | } | |
f986f2c8 | 525 | if (!strcmp(arg, "-r")) { |
3b67d291 | 526 | recover = 1; |
f986f2c8 JH |
527 | continue; |
528 | } | |
b41860bf MK |
529 | if (!strcmp(arg, "--strict")) { |
530 | strict = 1; | |
531 | continue; | |
532 | } | |
59556548 | 533 | if (starts_with(arg, "--pack_header=")) { |
bed006fb NP |
534 | struct pack_header *hdr; |
535 | char *c; | |
536 | ||
537 | hdr = (struct pack_header *)buffer; | |
538 | hdr->hdr_signature = htonl(PACK_SIGNATURE); | |
539 | hdr->hdr_version = htonl(strtoul(arg + 14, &c, 10)); | |
540 | if (*c != ',') | |
541 | die("bad %s", arg); | |
542 | hdr->hdr_entries = htonl(strtoul(c + 1, &c, 10)); | |
543 | if (*c) | |
544 | die("bad %s", arg); | |
545 | len = sizeof(*hdr); | |
546 | continue; | |
547 | } | |
bad50dc8 LT |
548 | usage(unpack_usage); |
549 | } | |
67e5a5ec LT |
550 | |
551 | /* We don't take any non-flag arguments now.. Maybe some day */ | |
bad50dc8 | 552 | usage(unpack_usage); |
67e5a5ec | 553 | } |
9126f009 | 554 | git_SHA1_Init(&ctx); |
74536958 | 555 | unpack_all(); |
9126f009 NP |
556 | git_SHA1_Update(&ctx, buffer, offset); |
557 | git_SHA1_Final(sha1, &ctx); | |
b41860bf MK |
558 | if (strict) |
559 | write_rest(); | |
a89fccd2 | 560 | if (hashcmp(fill(20), sha1)) |
67e5a5ec LT |
561 | die("final sha1 did not match"); |
562 | use(20); | |
563 | ||
564 | /* Write the last part of the buffer to stdout */ | |
565 | while (len) { | |
1c15afb9 JH |
566 | int ret = xwrite(1, buffer + offset, len); |
567 | if (ret <= 0) | |
67e5a5ec | 568 | break; |
67e5a5ec LT |
569 | len -= ret; |
570 | offset += ret; | |
571 | } | |
572 | ||
573 | /* All done */ | |
f986f2c8 | 574 | return has_errors; |
bad50dc8 | 575 | } |