Commit | Line | Data |
---|---|---|
0fcfd160 LT |
1 | /* |
2 | * GIT - The information manager from hell | |
3 | * | |
4 | * Copyright (C) Linus Torvalds, 2005 | |
5 | * | |
6 | * This handles basic git sha1 object files - packing, unpacking, | |
7 | * creation etc. | |
8 | */ | |
0fcfd160 | 9 | #include "cache.h" |
b2141fc1 | 10 | #include "config.h" |
6eac50d8 | 11 | #include "string-list.h" |
697cc8ef | 12 | #include "lockfile.h" |
1f688557 | 13 | #include "delta.h" |
a733cb60 | 14 | #include "pack.h" |
8e440259 PE |
15 | #include "blob.h" |
16 | #include "commit.h" | |
4dd1fbc7 | 17 | #include "run-command.h" |
8e440259 PE |
18 | #include "tag.h" |
19 | #include "tree.h" | |
c879daa2 | 20 | #include "tree-walk.h" |
f35a6d3b | 21 | #include "refs.h" |
70f5d5d3 | 22 | #include "pack-revindex.h" |
628522ec | 23 | #include "sha1-lookup.h" |
568508e7 | 24 | #include "bulk-checkin.h" |
031dc927 | 25 | #include "repository.h" |
47f351e9 | 26 | #include "replace-object.h" |
090ea126 | 27 | #include "streaming.h" |
543c5caa | 28 | #include "dir.h" |
12d95ef6 | 29 | #include "list.h" |
c4c6effa | 30 | #include "mergesort.h" |
cf3c6352 | 31 | #include "quote.h" |
4f39cd82 | 32 | #include "packfile.h" |
90c62155 | 33 | #include "object-store.h" |
b14ed5ad | 34 | #include "promisor-remote.h" |
e05db0fd | 35 | |
1af64f73 | 36 | /* The maximum size for an object header. */ |
37 | #define MAX_HEADER_LEN 32 | |
38 | ||
e1ccd7e2 | 39 | |
40 | #define EMPTY_TREE_SHA1_BIN_LITERAL \ | |
41 | "\x4b\x82\x5d\xc6\x42\xcb\x6e\xb9\xa0\x60" \ | |
42 | "\xe5\x4b\xf8\xd6\x92\x88\xfb\xee\x49\x04" | |
13eeedb5 | 43 | #define EMPTY_TREE_SHA256_BIN_LITERAL \ |
44 | "\x6e\xf1\x9b\x41\x22\x5c\x53\x69\xf1\xc1" \ | |
45 | "\x04\xd4\x5d\x8d\x85\xef\xa9\xb0\x57\xb5" \ | |
46 | "\x3b\x14\xb4\xb9\xb9\x39\xdd\x74\xde\xcc" \ | |
47 | "\x53\x21" | |
e1ccd7e2 | 48 | |
49 | #define EMPTY_BLOB_SHA1_BIN_LITERAL \ | |
50 | "\xe6\x9d\xe2\x9b\xb2\xd1\xd6\x43\x4b\x8b" \ | |
51 | "\x29\xae\x77\x5a\xd8\xc2\xe4\x8c\x53\x91" | |
13eeedb5 | 52 | #define EMPTY_BLOB_SHA256_BIN_LITERAL \ |
53 | "\x47\x3a\x0f\x4c\x3b\xe8\xa9\x36\x81\xa2" \ | |
54 | "\x67\xe3\xb1\xe9\xa7\xdc\xda\x11\x85\x43" \ | |
55 | "\x6f\xe1\x41\xf7\x74\x91\x20\xa3\x03\x72" \ | |
56 | "\x18\x13" | |
e1ccd7e2 | 57 | |
3e56e724 | 58 | const struct object_id null_oid; |
e1ccd7e2 | 59 | static const struct object_id empty_tree_oid = { |
8576fde6 JK |
60 | EMPTY_TREE_SHA1_BIN_LITERAL |
61 | }; | |
e1ccd7e2 | 62 | static const struct object_id empty_blob_oid = { |
8576fde6 JK |
63 | EMPTY_BLOB_SHA1_BIN_LITERAL |
64 | }; | |
13eeedb5 | 65 | static const struct object_id empty_tree_oid_sha256 = { |
66 | EMPTY_TREE_SHA256_BIN_LITERAL | |
67 | }; | |
68 | static const struct object_id empty_blob_oid_sha256 = { | |
69 | EMPTY_BLOB_SHA256_BIN_LITERAL | |
70 | }; | |
88cd621d | 71 | |
ac73cedf | 72 | static void git_hash_sha1_init(git_hash_ctx *ctx) |
f50e766b | 73 | { |
ac73cedf | 74 | git_SHA1_Init(&ctx->sha1); |
f50e766b | 75 | } |
76 | ||
768e30ea | 77 | static void git_hash_sha1_clone(git_hash_ctx *dst, const git_hash_ctx *src) |
78 | { | |
79 | git_SHA1_Clone(&dst->sha1, &src->sha1); | |
80 | } | |
81 | ||
ac73cedf | 82 | static void git_hash_sha1_update(git_hash_ctx *ctx, const void *data, size_t len) |
f50e766b | 83 | { |
ac73cedf | 84 | git_SHA1_Update(&ctx->sha1, data, len); |
f50e766b | 85 | } |
86 | ||
ac73cedf | 87 | static void git_hash_sha1_final(unsigned char *hash, git_hash_ctx *ctx) |
f50e766b | 88 | { |
ac73cedf | 89 | git_SHA1_Final(hash, &ctx->sha1); |
f50e766b | 90 | } |
91 | ||
13eeedb5 | 92 | |
93 | static void git_hash_sha256_init(git_hash_ctx *ctx) | |
94 | { | |
95 | git_SHA256_Init(&ctx->sha256); | |
96 | } | |
97 | ||
768e30ea | 98 | static void git_hash_sha256_clone(git_hash_ctx *dst, const git_hash_ctx *src) |
99 | { | |
100 | git_SHA256_Clone(&dst->sha256, &src->sha256); | |
101 | } | |
102 | ||
13eeedb5 | 103 | static void git_hash_sha256_update(git_hash_ctx *ctx, const void *data, size_t len) |
104 | { | |
105 | git_SHA256_Update(&ctx->sha256, data, len); | |
106 | } | |
107 | ||
108 | static void git_hash_sha256_final(unsigned char *hash, git_hash_ctx *ctx) | |
109 | { | |
110 | git_SHA256_Final(hash, &ctx->sha256); | |
111 | } | |
112 | ||
ac73cedf | 113 | static void git_hash_unknown_init(git_hash_ctx *ctx) |
f50e766b | 114 | { |
1a07e59c | 115 | BUG("trying to init unknown hash"); |
f50e766b | 116 | } |
117 | ||
768e30ea | 118 | static void git_hash_unknown_clone(git_hash_ctx *dst, const git_hash_ctx *src) |
119 | { | |
120 | BUG("trying to clone unknown hash"); | |
121 | } | |
122 | ||
ac73cedf | 123 | static void git_hash_unknown_update(git_hash_ctx *ctx, const void *data, size_t len) |
f50e766b | 124 | { |
1a07e59c | 125 | BUG("trying to update unknown hash"); |
f50e766b | 126 | } |
127 | ||
ac73cedf | 128 | static void git_hash_unknown_final(unsigned char *hash, git_hash_ctx *ctx) |
f50e766b | 129 | { |
1a07e59c | 130 | BUG("trying to finalize unknown hash"); |
f50e766b | 131 | } |
132 | ||
133 | const struct git_hash_algo hash_algos[GIT_HASH_NALGOS] = { | |
134 | { | |
135 | NULL, | |
136 | 0x00000000, | |
137 | 0, | |
138 | 0, | |
a2ce0a75 | 139 | 0, |
f50e766b | 140 | git_hash_unknown_init, |
768e30ea | 141 | git_hash_unknown_clone, |
f50e766b | 142 | git_hash_unknown_update, |
143 | git_hash_unknown_final, | |
144 | NULL, | |
145 | NULL, | |
146 | }, | |
147 | { | |
1ccf07cb | 148 | "sha1", |
f50e766b | 149 | /* "sha1", big-endian */ |
150 | 0x73686131, | |
f50e766b | 151 | GIT_SHA1_RAWSZ, |
152 | GIT_SHA1_HEXSZ, | |
a2ce0a75 | 153 | GIT_SHA1_BLKSZ, |
f50e766b | 154 | git_hash_sha1_init, |
768e30ea | 155 | git_hash_sha1_clone, |
f50e766b | 156 | git_hash_sha1_update, |
157 | git_hash_sha1_final, | |
158 | &empty_tree_oid, | |
159 | &empty_blob_oid, | |
160 | }, | |
13eeedb5 | 161 | { |
162 | "sha256", | |
163 | /* "s256", big-endian */ | |
164 | 0x73323536, | |
165 | GIT_SHA256_RAWSZ, | |
166 | GIT_SHA256_HEXSZ, | |
167 | GIT_SHA256_BLKSZ, | |
168 | git_hash_sha256_init, | |
768e30ea | 169 | git_hash_sha256_clone, |
13eeedb5 | 170 | git_hash_sha256_update, |
171 | git_hash_sha256_final, | |
172 | &empty_tree_oid_sha256, | |
173 | &empty_blob_oid_sha256, | |
174 | } | |
f50e766b | 175 | }; |
176 | ||
d8a92ced | 177 | const char *empty_tree_oid_hex(void) |
178 | { | |
179 | static char buf[GIT_MAX_HEXSZ + 1]; | |
180 | return oid_to_hex_r(buf, the_hash_algo->empty_tree); | |
181 | } | |
182 | ||
183 | const char *empty_blob_oid_hex(void) | |
184 | { | |
185 | static char buf[GIT_MAX_HEXSZ + 1]; | |
186 | return oid_to_hex_r(buf, the_hash_algo->empty_blob); | |
187 | } | |
188 | ||
2f90b9d9 | 189 | int hash_algo_by_name(const char *name) |
190 | { | |
191 | int i; | |
192 | if (!name) | |
193 | return GIT_HASH_UNKNOWN; | |
194 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
195 | if (!strcmp(name, hash_algos[i].name)) | |
196 | return i; | |
197 | return GIT_HASH_UNKNOWN; | |
198 | } | |
199 | ||
200 | int hash_algo_by_id(uint32_t format_id) | |
201 | { | |
202 | int i; | |
203 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
204 | if (format_id == hash_algos[i].format_id) | |
205 | return i; | |
206 | return GIT_HASH_UNKNOWN; | |
207 | } | |
208 | ||
95399788 | 209 | int hash_algo_by_length(int len) |
210 | { | |
211 | int i; | |
212 | for (i = 1; i < GIT_HASH_NALGOS; i++) | |
213 | if (len == hash_algos[i].rawsz) | |
214 | return i; | |
215 | return GIT_HASH_UNKNOWN; | |
216 | } | |
2f90b9d9 | 217 | |
c597ba80 NTND |
218 | /* |
219 | * This is meant to hold a *small* number of objects that you would | |
cb1c8d1d | 220 | * want read_object_file() to be able to return, but yet you do not want |
c597ba80 NTND |
221 | * to write them into the object store (e.g. a browse-only |
222 | * application). | |
223 | */ | |
224 | static struct cached_object { | |
62ba93ea | 225 | struct object_id oid; |
c597ba80 NTND |
226 | enum object_type type; |
227 | void *buf; | |
228 | unsigned long size; | |
229 | } *cached_objects; | |
230 | static int cached_object_nr, cached_object_alloc; | |
231 | ||
232 | static struct cached_object empty_tree = { | |
62ba93ea | 233 | { EMPTY_TREE_SHA1_BIN_LITERAL }, |
c597ba80 NTND |
234 | OBJ_TREE, |
235 | "", | |
236 | 0 | |
237 | }; | |
238 | ||
62ba93ea | 239 | static struct cached_object *find_cached_object(const struct object_id *oid) |
c597ba80 NTND |
240 | { |
241 | int i; | |
242 | struct cached_object *co = cached_objects; | |
243 | ||
244 | for (i = 0; i < cached_object_nr; i++, co++) { | |
4a7e27e9 | 245 | if (oideq(&co->oid, oid)) |
c597ba80 NTND |
246 | return co; |
247 | } | |
4a7e27e9 | 248 | if (oideq(oid, the_hash_algo->empty_tree)) |
c597ba80 NTND |
249 | return &empty_tree; |
250 | return NULL; | |
251 | } | |
252 | ||
9472935d | 253 | |
8462ff43 | 254 | static int get_conv_flags(unsigned flags) |
9472935d TB |
255 | { |
256 | if (flags & HASH_RENORMALIZE) | |
8462ff43 | 257 | return CONV_EOL_RENORMALIZE; |
9472935d | 258 | else if (flags & HASH_WRITE_OBJECT) |
107642fe | 259 | return global_conv_flags_eol | CONV_WRITE_OBJECT; |
9472935d | 260 | else |
8462ff43 | 261 | return 0; |
9472935d TB |
262 | } |
263 | ||
264 | ||
90a6464b JH |
265 | int mkdir_in_gitdir(const char *path) |
266 | { | |
267 | if (mkdir(path, 0777)) { | |
268 | int saved_errno = errno; | |
269 | struct stat st; | |
270 | struct strbuf sb = STRBUF_INIT; | |
271 | ||
272 | if (errno != EEXIST) | |
273 | return -1; | |
274 | /* | |
275 | * Are we looking at a path in a symlinked worktree | |
276 | * whose original repository does not yet have it? | |
277 | * e.g. .git/rr-cache pointing at its original | |
278 | * repository in which the user hasn't performed any | |
279 | * conflict resolution yet? | |
280 | */ | |
281 | if (lstat(path, &st) || !S_ISLNK(st.st_mode) || | |
282 | strbuf_readlink(&sb, path, st.st_size) || | |
283 | !is_absolute_path(sb.buf) || | |
284 | mkdir(sb.buf, 0777)) { | |
285 | strbuf_release(&sb); | |
286 | errno = saved_errno; | |
287 | return -1; | |
288 | } | |
289 | strbuf_release(&sb); | |
290 | } | |
291 | return adjust_shared_perm(path); | |
292 | } | |
293 | ||
0be0521b | 294 | enum scld_error safe_create_leading_directories(char *path) |
b2cb9425 | 295 | { |
26c8ae2a | 296 | char *next_component = path + offset_1st_component(path); |
0be0521b | 297 | enum scld_error ret = SCLD_OK; |
67d42212 | 298 | |
0be0521b | 299 | while (ret == SCLD_OK && next_component) { |
f0502332 | 300 | struct stat st; |
0f527403 | 301 | char *slash = next_component, slash_character; |
f0502332 | 302 | |
0f527403 MH |
303 | while (*slash && !is_dir_sep(*slash)) |
304 | slash++; | |
305 | ||
306 | if (!*slash) | |
b2cb9425 | 307 | break; |
bf10cf70 | 308 | |
26c8ae2a | 309 | next_component = slash + 1; |
0f527403 | 310 | while (is_dir_sep(*next_component)) |
bf10cf70 | 311 | next_component++; |
26c8ae2a | 312 | if (!*next_component) |
5f0bdf50 | 313 | break; |
831651fd | 314 | |
0f527403 | 315 | slash_character = *slash; |
831651fd | 316 | *slash = '\0'; |
67d42212 JR |
317 | if (!stat(path, &st)) { |
318 | /* path exists */ | |
204a047f MH |
319 | if (!S_ISDIR(st.st_mode)) { |
320 | errno = ENOTDIR; | |
0be0521b | 321 | ret = SCLD_EXISTS; |
204a047f | 322 | } |
53a39721 | 323 | } else if (mkdir(path, 0777)) { |
928734d9 | 324 | if (errno == EEXIST && |
9e6f885d | 325 | !stat(path, &st) && S_ISDIR(st.st_mode)) |
928734d9 | 326 | ; /* somebody created it since we checked */ |
18d37e86 MH |
327 | else if (errno == ENOENT) |
328 | /* | |
329 | * Either mkdir() failed because | |
330 | * somebody just pruned the containing | |
331 | * directory, or stat() failed because | |
332 | * the file that was in our way was | |
333 | * just removed. Either way, inform | |
334 | * the caller that it might be worth | |
335 | * trying again: | |
336 | */ | |
337 | ret = SCLD_VANISHED; | |
9e6f885d | 338 | else |
0be0521b | 339 | ret = SCLD_FAILED; |
53a39721 | 340 | } else if (adjust_shared_perm(path)) { |
0be0521b | 341 | ret = SCLD_PERMS; |
457f06d6 | 342 | } |
0f527403 | 343 | *slash = slash_character; |
b2cb9425 | 344 | } |
9e6f885d | 345 | return ret; |
b2cb9425 | 346 | } |
723c31fe | 347 | |
0be0521b | 348 | enum scld_error safe_create_leading_directories_const(const char *path) |
8e21d63b | 349 | { |
02944307 | 350 | int save_errno; |
8e21d63b JK |
351 | /* path points to cache entries, so xstrdup before messing with it */ |
352 | char *buf = xstrdup(path); | |
0be0521b | 353 | enum scld_error result = safe_create_leading_directories(buf); |
02944307 MH |
354 | |
355 | save_errno = errno; | |
8e21d63b | 356 | free(buf); |
02944307 | 357 | errno = save_errno; |
8e21d63b JK |
358 | return result; |
359 | } | |
360 | ||
177978f5 MH |
361 | int raceproof_create_file(const char *path, create_file_fn fn, void *cb) |
362 | { | |
363 | /* | |
364 | * The number of times we will try to remove empty directories | |
365 | * in the way of path. This is only 1 because if another | |
366 | * process is racily creating directories that conflict with | |
367 | * us, we don't want to fight against them. | |
368 | */ | |
369 | int remove_directories_remaining = 1; | |
370 | ||
371 | /* | |
372 | * The number of times that we will try to create the | |
373 | * directories containing path. We are willing to attempt this | |
374 | * more than once, because another process could be trying to | |
375 | * clean up empty directories at the same time as we are | |
376 | * trying to create them. | |
377 | */ | |
378 | int create_directories_remaining = 3; | |
379 | ||
380 | /* A scratch copy of path, filled lazily if we need it: */ | |
381 | struct strbuf path_copy = STRBUF_INIT; | |
382 | ||
383 | int ret, save_errno; | |
384 | ||
385 | /* Sanity check: */ | |
386 | assert(*path); | |
387 | ||
388 | retry_fn: | |
389 | ret = fn(path, cb); | |
390 | save_errno = errno; | |
391 | if (!ret) | |
392 | goto out; | |
393 | ||
394 | if (errno == EISDIR && remove_directories_remaining-- > 0) { | |
395 | /* | |
396 | * A directory is in the way. Maybe it is empty; try | |
397 | * to remove it: | |
398 | */ | |
399 | if (!path_copy.len) | |
400 | strbuf_addstr(&path_copy, path); | |
401 | ||
402 | if (!remove_dir_recursively(&path_copy, REMOVE_DIR_EMPTY_ONLY)) | |
403 | goto retry_fn; | |
404 | } else if (errno == ENOENT && create_directories_remaining-- > 0) { | |
405 | /* | |
406 | * Maybe the containing directory didn't exist, or | |
407 | * maybe it was just deleted by a process that is | |
408 | * racing with us to clean up empty directories. Try | |
409 | * to create it: | |
410 | */ | |
411 | enum scld_error scld_result; | |
412 | ||
413 | if (!path_copy.len) | |
414 | strbuf_addstr(&path_copy, path); | |
415 | ||
416 | do { | |
417 | scld_result = safe_create_leading_directories(path_copy.buf); | |
418 | if (scld_result == SCLD_OK) | |
419 | goto retry_fn; | |
420 | } while (scld_result == SCLD_VANISHED && create_directories_remaining-- > 0); | |
421 | } | |
422 | ||
423 | out: | |
424 | strbuf_release(&path_copy); | |
425 | errno = save_errno; | |
426 | return ret; | |
427 | } | |
428 | ||
514c5fdd | 429 | static void fill_loose_path(struct strbuf *buf, const struct object_id *oid) |
ace1534d JH |
430 | { |
431 | int i; | |
94b5e093 | 432 | for (i = 0; i < the_hash_algo->rawsz; i++) { |
ace1534d | 433 | static char hex[] = "0123456789abcdef"; |
514c5fdd | 434 | unsigned int val = oid->hash[i]; |
f7b7774f JK |
435 | strbuf_addch(buf, hex[val >> 4]); |
436 | strbuf_addch(buf, hex[val & 0xf]); | |
afbba2f0 | 437 | if (!i) |
f7b7774f | 438 | strbuf_addch(buf, '/'); |
ace1534d JH |
439 | } |
440 | } | |
441 | ||
f0eaf638 JK |
442 | static const char *odb_loose_path(struct object_directory *odb, |
443 | struct strbuf *buf, | |
514c5fdd | 444 | const struct object_id *oid) |
0fcfd160 | 445 | { |
b69fb867 | 446 | strbuf_reset(buf); |
f0eaf638 | 447 | strbuf_addstr(buf, odb->path); |
34498471 | 448 | strbuf_addch(buf, '/'); |
514c5fdd | 449 | fill_loose_path(buf, oid); |
f3f043a1 | 450 | return buf->buf; |
0fcfd160 LT |
451 | } |
452 | ||
f3f043a1 | 453 | const char *loose_object_path(struct repository *r, struct strbuf *buf, |
514c5fdd | 454 | const struct object_id *oid) |
29ec6af2 | 455 | { |
514c5fdd | 456 | return odb_loose_path(r->objects->odb, buf, oid); |
0fcfd160 LT |
457 | } |
458 | ||
4ea82473 JK |
459 | /* |
460 | * Return non-zero iff the path is usable as an alternate object database. | |
461 | */ | |
13313fc3 SB |
462 | static int alt_odb_usable(struct raw_object_store *o, |
463 | struct strbuf *path, | |
464 | const char *normalized_objdir) | |
4ea82473 | 465 | { |
263db403 | 466 | struct object_directory *odb; |
4ea82473 JK |
467 | |
468 | /* Detect cases where alternate disappeared */ | |
469 | if (!is_directory(path->buf)) { | |
259328b7 NTND |
470 | error(_("object directory %s does not exist; " |
471 | "check .git/objects/info/alternates"), | |
4ea82473 JK |
472 | path->buf); |
473 | return 0; | |
474 | } | |
475 | ||
476 | /* | |
477 | * Prevent the common mistake of listing the same | |
478 | * thing twice, or object directory itself. | |
479 | */ | |
f0eaf638 | 480 | for (odb = o->odb; odb; odb = odb->next) { |
263db403 | 481 | if (!fspathcmp(path->buf, odb->path)) |
4ea82473 JK |
482 | return 0; |
483 | } | |
484 | if (!fspathcmp(path->buf, normalized_objdir)) | |
485 | return 0; | |
486 | ||
487 | return 1; | |
488 | } | |
489 | ||
ddd5d056 JH |
490 | /* |
491 | * Prepare alternate object database registry. | |
d5a63b99 JH |
492 | * |
493 | * The variable alt_odb_list points at the list of struct | |
263db403 | 494 | * object_directory. The elements on this list come from |
d5a63b99 JH |
495 | * non-empty elements from colon separated ALTERNATE_DB_ENVIRONMENT |
496 | * environment variable, and $GIT_OBJECT_DIRECTORY/info/alternates, | |
1494e038 JH |
497 | * whose contents is similar to that environment variable but can be |
498 | * LF separated. Its base points at a statically allocated buffer that | |
d5a63b99 JH |
499 | * contains "/the/directory/corresponding/to/.git/objects/...", while |
500 | * its name points just after the slash at the end of ".git/objects/" | |
501 | * in the example above, and has enough space to hold 40-byte hex | |
502 | * SHA1, an extra slash for the first level indirection, and the | |
503 | * terminating NUL. | |
ddd5d056 | 504 | */ |
77f012e8 SB |
505 | static void read_info_alternates(struct repository *r, |
506 | const char *relative_base, | |
507 | int depth); | |
508 | static int link_alt_odb_entry(struct repository *r, const char *entry, | |
cfc62fc9 | 509 | const char *relative_base, int depth, const char *normalized_objdir) |
ace1534d | 510 | { |
263db403 | 511 | struct object_directory *ent; |
5bdf0a84 | 512 | struct strbuf pathbuf = STRBUF_INIT; |
d5a63b99 | 513 | |
85dadc38 | 514 | if (!is_absolute_path(entry) && relative_base) { |
4ac9006f | 515 | strbuf_realpath(&pathbuf, relative_base, 1); |
5bdf0a84 | 516 | strbuf_addch(&pathbuf, '/'); |
c2f493a4 | 517 | } |
6eac50d8 | 518 | strbuf_addstr(&pathbuf, entry); |
c2f493a4 | 519 | |
37a95862 | 520 | if (strbuf_normalize_path(&pathbuf) < 0 && relative_base) { |
259328b7 | 521 | error(_("unable to normalize alternate object path: %s"), |
670c359d JK |
522 | pathbuf.buf); |
523 | strbuf_release(&pathbuf); | |
524 | return -1; | |
525 | } | |
5bdf0a84 HW |
526 | |
527 | /* | |
528 | * The trailing slash after the directory name is given by | |
529 | * this function at the end. Remove duplicates. | |
530 | */ | |
4ea82473 JK |
531 | while (pathbuf.len && pathbuf.buf[pathbuf.len - 1] == '/') |
532 | strbuf_setlen(&pathbuf, pathbuf.len - 1); | |
5bdf0a84 | 533 | |
77f012e8 | 534 | if (!alt_odb_usable(r->objects, &pathbuf, normalized_objdir)) { |
4ea82473 | 535 | strbuf_release(&pathbuf); |
c2f493a4 MW |
536 | return -1; |
537 | } | |
538 | ||
f0eaf638 JK |
539 | ent = xcalloc(1, sizeof(*ent)); |
540 | ent->path = xstrdup(pathbuf.buf); | |
c2f493a4 MW |
541 | |
542 | /* add the alternate entry */ | |
f0eaf638 JK |
543 | *r->objects->odb_tail = ent; |
544 | r->objects->odb_tail = &(ent->next); | |
c2f493a4 MW |
545 | ent->next = NULL; |
546 | ||
547 | /* recursively add alternates */ | |
77f012e8 | 548 | read_info_alternates(r, pathbuf.buf, depth + 1); |
c2f493a4 | 549 | |
4ea82473 | 550 | strbuf_release(&pathbuf); |
c2f493a4 MW |
551 | return 0; |
552 | } | |
553 | ||
cf3c6352 JK |
554 | static const char *parse_alt_odb_entry(const char *string, |
555 | int sep, | |
556 | struct strbuf *out) | |
557 | { | |
558 | const char *end; | |
559 | ||
560 | strbuf_reset(out); | |
561 | ||
562 | if (*string == '#') { | |
563 | /* comment; consume up to next separator */ | |
564 | end = strchrnul(string, sep); | |
565 | } else if (*string == '"' && !unquote_c_style(out, string, &end)) { | |
566 | /* | |
567 | * quoted path; unquote_c_style has copied the | |
568 | * data for us and set "end". Broken quoting (e.g., | |
569 | * an entry that doesn't end with a quote) falls | |
570 | * back to the unquoted case below. | |
571 | */ | |
572 | } else { | |
573 | /* normal, unquoted path */ | |
574 | end = strchrnul(string, sep); | |
575 | strbuf_add(out, string, end - string); | |
576 | } | |
577 | ||
578 | if (*end) | |
579 | end++; | |
580 | return end; | |
581 | } | |
582 | ||
77f012e8 SB |
583 | static void link_alt_odb_entries(struct repository *r, const char *alt, |
584 | int sep, const char *relative_base, int depth) | |
c2f493a4 | 585 | { |
539e7506 | 586 | struct strbuf objdirbuf = STRBUF_INIT; |
cf3c6352 | 587 | struct strbuf entry = STRBUF_INIT; |
c2f493a4 | 588 | |
f28e3668 JK |
589 | if (!alt || !*alt) |
590 | return; | |
591 | ||
c2f493a4 | 592 | if (depth > 5) { |
259328b7 | 593 | error(_("%s: ignoring alternate object stores, nesting too deep"), |
c2f493a4 MW |
594 | relative_base); |
595 | return; | |
596 | } | |
597 | ||
f0eaf638 | 598 | strbuf_add_absolute_path(&objdirbuf, r->objects->odb->path); |
670c359d | 599 | if (strbuf_normalize_path(&objdirbuf) < 0) |
259328b7 | 600 | die(_("unable to normalize object directory: %s"), |
670c359d | 601 | objdirbuf.buf); |
539e7506 | 602 | |
cf3c6352 JK |
603 | while (*alt) { |
604 | alt = parse_alt_odb_entry(alt, sep, &entry); | |
605 | if (!entry.len) | |
9577e7e3 | 606 | continue; |
77f012e8 | 607 | link_alt_odb_entry(r, entry.buf, |
cfc62fc9 | 608 | relative_base, depth, objdirbuf.buf); |
9577e7e3 | 609 | } |
cf3c6352 | 610 | strbuf_release(&entry); |
539e7506 | 611 | strbuf_release(&objdirbuf); |
d5a63b99 JH |
612 | } |
613 | ||
77f012e8 SB |
614 | static void read_info_alternates(struct repository *r, |
615 | const char *relative_base, | |
616 | int depth) | |
d5a63b99 | 617 | { |
5015f01c | 618 | char *path; |
dc732bd5 | 619 | struct strbuf buf = STRBUF_INIT; |
d5a63b99 | 620 | |
5015f01c | 621 | path = xstrfmt("%s/info/alternates", relative_base); |
dc732bd5 | 622 | if (strbuf_read_file(&buf, path, 1024) < 0) { |
f0f7bebe | 623 | warn_on_fopen_errors(path); |
dc732bd5 | 624 | free(path); |
9a217f2a | 625 | return; |
ace1534d | 626 | } |
d5a63b99 | 627 | |
77f012e8 | 628 | link_alt_odb_entries(r, buf.buf, '\n', relative_base, depth); |
dc732bd5 JK |
629 | strbuf_release(&buf); |
630 | free(path); | |
ace1534d JH |
631 | } |
632 | ||
bef70b22 DB |
633 | void add_to_alternates_file(const char *reference) |
634 | { | |
f132a127 | 635 | struct lock_file lock = LOCK_INIT; |
77b9b1d1 JK |
636 | char *alts = git_pathdup("objects/info/alternates"); |
637 | FILE *in, *out; | |
f132a127 | 638 | int found = 0; |
77b9b1d1 | 639 | |
f132a127 MÅ |
640 | hold_lock_file_for_update(&lock, alts, LOCK_DIE_ON_ERROR); |
641 | out = fdopen_lock_file(&lock, "w"); | |
77b9b1d1 | 642 | if (!out) |
259328b7 | 643 | die_errno(_("unable to fdopen alternates lockfile")); |
77b9b1d1 JK |
644 | |
645 | in = fopen(alts, "r"); | |
646 | if (in) { | |
647 | struct strbuf line = STRBUF_INIT; | |
77b9b1d1 | 648 | |
3f163962 | 649 | while (strbuf_getline(&line, in) != EOF) { |
77b9b1d1 JK |
650 | if (!strcmp(reference, line.buf)) { |
651 | found = 1; | |
652 | break; | |
653 | } | |
654 | fprintf_or_die(out, "%s\n", line.buf); | |
655 | } | |
656 | ||
657 | strbuf_release(&line); | |
658 | fclose(in); | |
77b9b1d1 JK |
659 | } |
660 | else if (errno != ENOENT) | |
259328b7 | 661 | die_errno(_("unable to read alternates file")); |
77b9b1d1 | 662 | |
f132a127 MÅ |
663 | if (found) { |
664 | rollback_lock_file(&lock); | |
665 | } else { | |
77b9b1d1 | 666 | fprintf_or_die(out, "%s\n", reference); |
f132a127 | 667 | if (commit_lock_file(&lock)) |
259328b7 | 668 | die_errno(_("unable to move new alternates file into place")); |
f0eaf638 | 669 | if (the_repository->objects->loaded_alternates) |
93d8d1e2 SB |
670 | link_alt_odb_entries(the_repository, reference, |
671 | '\n', NULL, 0); | |
77b9b1d1 JK |
672 | } |
673 | free(alts); | |
bef70b22 DB |
674 | } |
675 | ||
a5b34d21 JK |
676 | void add_to_alternates_memory(const char *reference) |
677 | { | |
678 | /* | |
679 | * Make sure alternates are initialized, or else our entry may be | |
680 | * overwritten when they are. | |
681 | */ | |
0b209034 | 682 | prepare_alt_odb(the_repository); |
a5b34d21 | 683 | |
93d8d1e2 SB |
684 | link_alt_odb_entries(the_repository, reference, |
685 | '\n', NULL, 0); | |
a5b34d21 JK |
686 | } |
687 | ||
9eeea7d2 SB |
688 | /* |
689 | * Compute the exact path an alternate is at and returns it. In case of | |
690 | * error NULL is returned and the human readable error is added to `err` | |
efde7b72 | 691 | * `path` may be relative and should point to $GIT_DIR. |
9eeea7d2 SB |
692 | * `err` must not be null. |
693 | */ | |
694 | char *compute_alternate_path(const char *path, struct strbuf *err) | |
695 | { | |
696 | char *ref_git = NULL; | |
4530a85b | 697 | const char *repo; |
9eeea7d2 SB |
698 | int seen_error = 0; |
699 | ||
4530a85b AM |
700 | ref_git = real_pathdup(path, 0); |
701 | if (!ref_git) { | |
9eeea7d2 SB |
702 | seen_error = 1; |
703 | strbuf_addf(err, _("path '%s' does not exist"), path); | |
704 | goto out; | |
4530a85b | 705 | } |
9eeea7d2 SB |
706 | |
707 | repo = read_gitfile(ref_git); | |
708 | if (!repo) | |
709 | repo = read_gitfile(mkpath("%s/.git", ref_git)); | |
710 | if (repo) { | |
711 | free(ref_git); | |
712 | ref_git = xstrdup(repo); | |
713 | } | |
714 | ||
715 | if (!repo && is_directory(mkpath("%s/.git/objects", ref_git))) { | |
716 | char *ref_git_git = mkpathdup("%s/.git", ref_git); | |
717 | free(ref_git); | |
718 | ref_git = ref_git_git; | |
719 | } else if (!is_directory(mkpath("%s/objects", ref_git))) { | |
720 | struct strbuf sb = STRBUF_INIT; | |
721 | seen_error = 1; | |
722 | if (get_common_dir(&sb, ref_git)) { | |
723 | strbuf_addf(err, | |
724 | _("reference repository '%s' as a linked " | |
725 | "checkout is not supported yet."), | |
726 | path); | |
727 | goto out; | |
728 | } | |
729 | ||
730 | strbuf_addf(err, _("reference repository '%s' is not a " | |
731 | "local repository."), path); | |
732 | goto out; | |
733 | } | |
734 | ||
735 | if (!access(mkpath("%s/shallow", ref_git), F_OK)) { | |
736 | strbuf_addf(err, _("reference repository '%s' is shallow"), | |
737 | path); | |
738 | seen_error = 1; | |
739 | goto out; | |
740 | } | |
741 | ||
742 | if (!access(mkpath("%s/info/grafts", ref_git), F_OK)) { | |
743 | strbuf_addf(err, | |
744 | _("reference repository '%s' is grafted"), | |
745 | path); | |
746 | seen_error = 1; | |
747 | goto out; | |
748 | } | |
749 | ||
750 | out: | |
751 | if (seen_error) { | |
6a83d902 | 752 | FREE_AND_NULL(ref_git); |
9eeea7d2 SB |
753 | } |
754 | ||
755 | return ref_git; | |
756 | } | |
757 | ||
709dfa69 JK |
758 | static void fill_alternate_refs_command(struct child_process *cmd, |
759 | const char *repo_path) | |
760 | { | |
761 | const char *value; | |
762 | ||
763 | if (!git_config_get_value("core.alternateRefsCommand", &value)) { | |
764 | cmd->use_shell = 1; | |
765 | ||
766 | argv_array_push(&cmd->args, value); | |
767 | argv_array_push(&cmd->args, repo_path); | |
768 | } else { | |
769 | cmd->git_cmd = 1; | |
770 | ||
771 | argv_array_pushf(&cmd->args, "--git-dir=%s", repo_path); | |
772 | argv_array_push(&cmd->args, "for-each-ref"); | |
773 | argv_array_push(&cmd->args, "--format=%(objectname)"); | |
774 | ||
775 | if (!git_config_get_value("core.alternateRefsPrefixes", &value)) { | |
776 | argv_array_push(&cmd->args, "--"); | |
777 | argv_array_split(&cmd->args, value); | |
778 | } | |
779 | } | |
780 | ||
781 | cmd->env = local_repo_env; | |
782 | cmd->out = -1; | |
783 | } | |
784 | ||
785 | static void read_alternate_refs(const char *path, | |
786 | alternate_ref_fn *cb, | |
787 | void *data) | |
788 | { | |
789 | struct child_process cmd = CHILD_PROCESS_INIT; | |
790 | struct strbuf line = STRBUF_INIT; | |
791 | FILE *fh; | |
792 | ||
793 | fill_alternate_refs_command(&cmd, path); | |
794 | ||
795 | if (start_command(&cmd)) | |
796 | return; | |
797 | ||
798 | fh = xfdopen(cmd.out, "r"); | |
799 | while (strbuf_getline_lf(&line, fh) != EOF) { | |
800 | struct object_id oid; | |
801 | const char *p; | |
802 | ||
803 | if (parse_oid_hex(line.buf, &oid, &p) || *p) { | |
804 | warning(_("invalid line while parsing alternate refs: %s"), | |
805 | line.buf); | |
806 | break; | |
807 | } | |
808 | ||
809 | cb(&oid, data); | |
810 | } | |
811 | ||
812 | fclose(fh); | |
813 | finish_command(&cmd); | |
86ad3ea5 | 814 | strbuf_release(&line); |
709dfa69 JK |
815 | } |
816 | ||
817 | struct alternate_refs_data { | |
818 | alternate_ref_fn *fn; | |
819 | void *data; | |
820 | }; | |
821 | ||
822 | static int refs_from_alternate_cb(struct object_directory *e, | |
823 | void *data) | |
824 | { | |
825 | struct strbuf path = STRBUF_INIT; | |
826 | size_t base_len; | |
827 | struct alternate_refs_data *cb = data; | |
828 | ||
829 | if (!strbuf_realpath(&path, e->path, 0)) | |
830 | goto out; | |
831 | if (!strbuf_strip_suffix(&path, "/objects")) | |
832 | goto out; | |
833 | base_len = path.len; | |
834 | ||
835 | /* Is this a git repository with refs? */ | |
836 | strbuf_addstr(&path, "/refs"); | |
837 | if (!is_directory(path.buf)) | |
838 | goto out; | |
839 | strbuf_setlen(&path, base_len); | |
840 | ||
841 | read_alternate_refs(path.buf, cb->fn, cb->data); | |
842 | ||
843 | out: | |
844 | strbuf_release(&path); | |
845 | return 0; | |
846 | } | |
847 | ||
848 | void for_each_alternate_ref(alternate_ref_fn fn, void *data) | |
849 | { | |
850 | struct alternate_refs_data cb; | |
851 | cb.fn = fn; | |
852 | cb.data = data; | |
853 | foreach_alt_odb(refs_from_alternate_cb, &cb); | |
854 | } | |
855 | ||
fe1b2268 | 856 | int foreach_alt_odb(alt_odb_fn fn, void *cb) |
d79796bc | 857 | { |
263db403 | 858 | struct object_directory *ent; |
fe1b2268 | 859 | int r = 0; |
d79796bc | 860 | |
0b209034 | 861 | prepare_alt_odb(the_repository); |
f0eaf638 | 862 | for (ent = the_repository->objects->odb->next; ent; ent = ent->next) { |
fe1b2268 JK |
863 | r = fn(ent, cb); |
864 | if (r) | |
865 | break; | |
866 | } | |
867 | return r; | |
d79796bc JH |
868 | } |
869 | ||
13068bf0 | 870 | void prepare_alt_odb(struct repository *r) |
c2f493a4 | 871 | { |
f0eaf638 | 872 | if (r->objects->loaded_alternates) |
7dc24aa5 SP |
873 | return; |
874 | ||
13068bf0 | 875 | link_alt_odb_entries(r, r->objects->alternate_db, PATH_SEP, NULL, 0); |
c2f493a4 | 876 | |
f0eaf638 JK |
877 | read_info_alternates(r, r->objects->odb->path, 0); |
878 | r->objects->loaded_alternates = 1; | |
c2f493a4 MW |
879 | } |
880 | ||
3096b2ec | 881 | /* Returns 1 if we have successfully freshened the file, 0 otherwise. */ |
33d4221c | 882 | static int freshen_file(const char *fn) |
ace1534d | 883 | { |
312cd761 | 884 | return !utime(fn, NULL); |
0f4dc14a | 885 | } |
ace1534d | 886 | |
3096b2ec JK |
887 | /* |
888 | * All of the check_and_freshen functions return 1 if the file exists and was | |
889 | * freshened (if freshening was requested), 0 otherwise. If they return | |
890 | * 0, you should not assume that it is safe to skip a write of the object (it | |
891 | * either does not exist on disk, or has a stale mtime and may be subject to | |
892 | * pruning). | |
893 | */ | |
6a5e6f5e | 894 | int check_and_freshen_file(const char *fn, int freshen) |
33d4221c JK |
895 | { |
896 | if (access(fn, F_OK)) | |
897 | return 0; | |
3096b2ec | 898 | if (freshen && !freshen_file(fn)) |
33d4221c JK |
899 | return 0; |
900 | return 1; | |
901 | } | |
902 | ||
f0eaf638 JK |
903 | static int check_and_freshen_odb(struct object_directory *odb, |
904 | const struct object_id *oid, | |
905 | int freshen) | |
33d4221c | 906 | { |
f0eaf638 | 907 | static struct strbuf path = STRBUF_INIT; |
514c5fdd | 908 | odb_loose_path(odb, &path, oid); |
f0eaf638 JK |
909 | return check_and_freshen_file(path.buf, freshen); |
910 | } | |
ea657730 | 911 | |
f0eaf638 JK |
912 | static int check_and_freshen_local(const struct object_id *oid, int freshen) |
913 | { | |
914 | return check_and_freshen_odb(the_repository->objects->odb, oid, freshen); | |
33d4221c JK |
915 | } |
916 | ||
6862ebbf | 917 | static int check_and_freshen_nonlocal(const struct object_id *oid, int freshen) |
0f4dc14a | 918 | { |
263db403 | 919 | struct object_directory *odb; |
f3f043a1 | 920 | |
0b209034 | 921 | prepare_alt_odb(the_repository); |
f0eaf638 JK |
922 | for (odb = the_repository->objects->odb->next; odb; odb = odb->next) { |
923 | if (check_and_freshen_odb(odb, oid, freshen)) | |
c529d75a | 924 | return 1; |
ace1534d | 925 | } |
c529d75a | 926 | return 0; |
ace1534d JH |
927 | } |
928 | ||
6862ebbf | 929 | static int check_and_freshen(const struct object_id *oid, int freshen) |
33d4221c | 930 | { |
6862ebbf | 931 | return check_and_freshen_local(oid, freshen) || |
932 | check_and_freshen_nonlocal(oid, freshen); | |
33d4221c JK |
933 | } |
934 | ||
6862ebbf | 935 | int has_loose_object_nonlocal(const struct object_id *oid) |
33d4221c | 936 | { |
6862ebbf | 937 | return check_and_freshen_nonlocal(oid, 0); |
33d4221c JK |
938 | } |
939 | ||
6862ebbf | 940 | static int has_loose_object(const struct object_id *oid) |
0f4dc14a | 941 | { |
6862ebbf | 942 | return check_and_freshen(oid, 0); |
0f4dc14a BC |
943 | } |
944 | ||
02710228 SP |
945 | static void mmap_limit_check(size_t length) |
946 | { | |
947 | static size_t limit = 0; | |
948 | if (!limit) { | |
949 | limit = git_env_ulong("GIT_MMAP_LIMIT", 0); | |
950 | if (!limit) | |
951 | limit = SIZE_MAX; | |
952 | } | |
953 | if (length > limit) | |
259328b7 | 954 | die(_("attempting to mmap %"PRIuMAX" over limit %"PRIuMAX), |
02710228 SP |
955 | (uintmax_t)length, (uintmax_t)limit); |
956 | } | |
957 | ||
1570856b JK |
958 | void *xmmap_gently(void *start, size_t length, |
959 | int prot, int flags, int fd, off_t offset) | |
58ecbd5e | 960 | { |
02710228 SP |
961 | void *ret; |
962 | ||
963 | mmap_limit_check(length); | |
964 | ret = mmap(start, length, prot, flags, fd, offset); | |
9827d4c1 JK |
965 | if (ret == MAP_FAILED && !length) |
966 | ret = NULL; | |
58ecbd5e JN |
967 | return ret; |
968 | } | |
969 | ||
1570856b JK |
970 | void *xmmap(void *start, size_t length, |
971 | int prot, int flags, int fd, off_t offset) | |
972 | { | |
973 | void *ret = xmmap_gently(start, length, prot, flags, fd, offset); | |
974 | if (ret == MAP_FAILED) | |
259328b7 | 975 | die_errno(_("mmap failed")); |
1570856b JK |
976 | return ret; |
977 | } | |
978 | ||
88d0db55 | 979 | /* |
090ea126 | 980 | * With an in-core object data in "map", rehash it to make sure the |
cb1c8d1d JK |
981 | * object name actually matches "oid" to detect object corruption. |
982 | * With "map" == NULL, try reading the object named with "oid" using | |
090ea126 | 983 | * the streaming interface and rehash it to do the same. |
88d0db55 | 984 | */ |
b98d1885 MT |
985 | int check_object_signature(struct repository *r, const struct object_id *oid, |
986 | void *map, unsigned long size, const char *type) | |
88d0db55 | 987 | { |
f070facc | 988 | struct object_id real_oid; |
090ea126 NTND |
989 | enum object_type obj_type; |
990 | struct git_istream *st; | |
18e2588e | 991 | git_hash_ctx c; |
1af64f73 | 992 | char hdr[MAX_HEADER_LEN]; |
090ea126 | 993 | int hdrlen; |
88d0db55 | 994 | |
090ea126 | 995 | if (map) { |
b98d1885 | 996 | hash_object_file(r->hash_algo, map, size, type, &real_oid); |
9001dc2a | 997 | return !oideq(oid, &real_oid) ? -1 : 0; |
88d0db55 BC |
998 | } |
999 | ||
b98d1885 | 1000 | st = open_istream(r, oid, &obj_type, &size, NULL); |
090ea126 NTND |
1001 | if (!st) |
1002 | return -1; | |
88d0db55 | 1003 | |
090ea126 | 1004 | /* Generate the header */ |
ca473cef | 1005 | hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(obj_type), (uintmax_t)size) + 1; |
88d0db55 | 1006 | |
090ea126 | 1007 | /* Sha1.. */ |
b98d1885 MT |
1008 | r->hash_algo->init_fn(&c); |
1009 | r->hash_algo->update_fn(&c, hdr, hdrlen); | |
090ea126 NTND |
1010 | for (;;) { |
1011 | char buf[1024 * 16]; | |
1012 | ssize_t readlen = read_istream(st, buf, sizeof(buf)); | |
1f688557 | 1013 | |
f54fac53 JK |
1014 | if (readlen < 0) { |
1015 | close_istream(st); | |
1016 | return -1; | |
1017 | } | |
090ea126 NTND |
1018 | if (!readlen) |
1019 | break; | |
b98d1885 | 1020 | r->hash_algo->update_fn(&c, buf, readlen); |
fa5fc15d | 1021 | } |
b98d1885 | 1022 | r->hash_algo->final_fn(real_oid.hash, &c); |
090ea126 | 1023 | close_istream(st); |
9001dc2a | 1024 | return !oideq(oid, &real_oid) ? -1 : 0; |
fa5fc15d SP |
1025 | } |
1026 | ||
1b8ac5ea | 1027 | int git_open_cloexec(const char *name, int flags) |
a0788266 | 1028 | { |
1e3001a8 JH |
1029 | int fd; |
1030 | static int o_cloexec = O_CLOEXEC; | |
a0788266 | 1031 | |
1e3001a8 JH |
1032 | fd = open(name, flags | o_cloexec); |
1033 | if ((o_cloexec & O_CLOEXEC) && fd < 0 && errno == EINVAL) { | |
cd66ada0 | 1034 | /* Try again w/o O_CLOEXEC: the kernel might not support it */ |
1e3001a8 JH |
1035 | o_cloexec &= ~O_CLOEXEC; |
1036 | fd = open(name, flags | o_cloexec); | |
491a8dec | 1037 | } |
491a8dec | 1038 | |
9fb9495d | 1039 | #if defined(F_GETFD) && defined(F_SETFD) && defined(FD_CLOEXEC) |
491a8dec | 1040 | { |
1e3001a8 | 1041 | static int fd_cloexec = FD_CLOEXEC; |
a0788266 | 1042 | |
1e3001a8 JH |
1043 | if (!o_cloexec && 0 <= fd && fd_cloexec) { |
1044 | /* Opened w/o O_CLOEXEC? try with fcntl(2) to add it */ | |
9fb9495d EW |
1045 | int flags = fcntl(fd, F_GETFD); |
1046 | if (fcntl(fd, F_SETFD, flags | fd_cloexec)) | |
1e3001a8 | 1047 | fd_cloexec = 0; |
cd66ada0 | 1048 | } |
44d1c19e | 1049 | } |
a0788266 | 1050 | #endif |
1b8ac5ea | 1051 | return fd; |
a0788266 JS |
1052 | } |
1053 | ||
3cf8b462 | 1054 | /* |
514c5fdd | 1055 | * Find "oid" as a loose object in the local repository or in an alternate. |
771e7d57 JK |
1056 | * Returns 0 on success, negative on failure. |
1057 | * | |
1058 | * The "path" out-parameter will give the path of the object we found (if any). | |
1059 | * Note that it may point to static storage and is only valid until another | |
514c5fdd | 1060 | * call to stat_loose_object(). |
3cf8b462 | 1061 | */ |
514c5fdd JK |
1062 | static int stat_loose_object(struct repository *r, const struct object_id *oid, |
1063 | struct stat *st, const char **path) | |
1f688557 | 1064 | { |
263db403 | 1065 | struct object_directory *odb; |
ea657730 CC |
1066 | static struct strbuf buf = STRBUF_INIT; |
1067 | ||
d2607fa0 | 1068 | prepare_alt_odb(r); |
f0eaf638 | 1069 | for (odb = r->objects->odb; odb; odb = odb->next) { |
514c5fdd | 1070 | *path = odb_loose_path(odb, &buf, oid); |
771e7d57 | 1071 | if (!lstat(*path, st)) |
052fe5ea | 1072 | return 0; |
c7934306 SP |
1073 | } |
1074 | ||
3cf8b462 SP |
1075 | return -1; |
1076 | } | |
1077 | ||
771e7d57 | 1078 | /* |
514c5fdd | 1079 | * Like stat_loose_object(), but actually open the object and return the |
771e7d57 JK |
1080 | * descriptor. See the caveats on the "path" parameter above. |
1081 | */ | |
514c5fdd JK |
1082 | static int open_loose_object(struct repository *r, |
1083 | const struct object_id *oid, const char **path) | |
60bb8b14 | 1084 | { |
44d1c19e | 1085 | int fd; |
263db403 | 1086 | struct object_directory *odb; |
f0eaf638 | 1087 | int most_interesting_errno = ENOENT; |
ea657730 CC |
1088 | static struct strbuf buf = STRBUF_INIT; |
1089 | ||
ec7283e5 | 1090 | prepare_alt_odb(r); |
f0eaf638 | 1091 | for (odb = r->objects->odb; odb; odb = odb->next) { |
514c5fdd | 1092 | *path = odb_loose_path(odb, &buf, oid); |
771e7d57 | 1093 | fd = git_open(*path); |
44d1c19e LT |
1094 | if (fd >= 0) |
1095 | return fd; | |
f0eaf638 | 1096 | |
d6c8a05b JK |
1097 | if (most_interesting_errno == ENOENT) |
1098 | most_interesting_errno = errno; | |
03e79c88 | 1099 | } |
d6c8a05b | 1100 | errno = most_interesting_errno; |
44d1c19e | 1101 | return -1; |
1f688557 JH |
1102 | } |
1103 | ||
61c7711c | 1104 | static int quick_has_loose(struct repository *r, |
d7a24573 | 1105 | const struct object_id *oid) |
61c7711c | 1106 | { |
61c7711c JK |
1107 | struct object_directory *odb; |
1108 | ||
61c7711c JK |
1109 | prepare_alt_odb(r); |
1110 | for (odb = r->objects->odb; odb; odb = odb->next) { | |
d7a24573 | 1111 | if (oid_array_lookup(odb_loose_cache(odb, oid), oid) >= 0) |
61c7711c JK |
1112 | return 1; |
1113 | } | |
1114 | return 0; | |
1115 | } | |
1116 | ||
f6371f92 JK |
1117 | /* |
1118 | * Map the loose object at "path" if it is not NULL, or the path found by | |
514c5fdd | 1119 | * searching for a loose object named "oid". |
f6371f92 | 1120 | */ |
514c5fdd JK |
1121 | static void *map_loose_object_1(struct repository *r, const char *path, |
1122 | const struct object_id *oid, unsigned long *size) | |
27d69a46 | 1123 | { |
0fcfd160 | 1124 | void *map; |
144bde78 | 1125 | int fd; |
84dd81c1 | 1126 | |
f6371f92 JK |
1127 | if (path) |
1128 | fd = git_open(path); | |
8261e1f1 | 1129 | else |
514c5fdd | 1130 | fd = open_loose_object(r, oid, &path); |
44d1c19e LT |
1131 | map = NULL; |
1132 | if (fd >= 0) { | |
1133 | struct stat st; | |
1f688557 | 1134 | |
44d1c19e LT |
1135 | if (!fstat(fd, &st)) { |
1136 | *size = xsize_t(st.st_size); | |
33e42de0 MM |
1137 | if (!*size) { |
1138 | /* mmap() is forbidden on empty files */ | |
259328b7 | 1139 | error(_("object file %s is empty"), path); |
6881925e | 1140 | close(fd); |
33e42de0 MM |
1141 | return NULL; |
1142 | } | |
44d1c19e | 1143 | map = xmmap(NULL, *size, PROT_READ, MAP_PRIVATE, fd, 0); |
144bde78 | 1144 | } |
44d1c19e | 1145 | close(fd); |
74e34e1f | 1146 | } |
0fcfd160 | 1147 | return map; |
74e34e1f NP |
1148 | } |
1149 | ||
514c5fdd JK |
1150 | void *map_loose_object(struct repository *r, |
1151 | const struct object_id *oid, | |
1152 | unsigned long *size) | |
068f85e3 | 1153 | { |
514c5fdd | 1154 | return map_loose_object_1(r, NULL, oid, size); |
068f85e3 | 1155 | } |
1156 | ||
00a7760e JK |
1157 | static int unpack_loose_short_header(git_zstream *stream, |
1158 | unsigned char *map, unsigned long mapsize, | |
1159 | void *buffer, unsigned long bufsiz) | |
47fe3f6e | 1160 | { |
31877c9a MT |
1161 | int ret; |
1162 | ||
c4483576 LT |
1163 | /* Get the data stream */ |
1164 | memset(stream, 0, sizeof(*stream)); | |
1165 | stream->next_in = map; | |
1166 | stream->avail_in = mapsize; | |
1167 | stream->next_out = buffer; | |
93821bd9 | 1168 | stream->avail_out = bufsiz; |
47fe3f6e | 1169 | |
39c68542 | 1170 | git_inflate_init(stream); |
31877c9a MT |
1171 | obj_read_unlock(); |
1172 | ret = git_inflate(stream, 0); | |
1173 | obj_read_lock(); | |
1174 | ||
1175 | return ret; | |
9a217f2a JH |
1176 | } |
1177 | ||
00a7760e JK |
1178 | int unpack_loose_header(git_zstream *stream, |
1179 | unsigned char *map, unsigned long mapsize, | |
1180 | void *buffer, unsigned long bufsiz) | |
1f688557 | 1181 | { |
00a7760e JK |
1182 | int status = unpack_loose_short_header(stream, map, mapsize, |
1183 | buffer, bufsiz); | |
42873078 | 1184 | |
d21f8426 JH |
1185 | if (status < Z_OK) |
1186 | return status; | |
628522ec | 1187 | |
d21f8426 JH |
1188 | /* Make sure we have the terminating NUL */ |
1189 | if (!memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) | |
1190 | return -1; | |
1f688557 JH |
1191 | return 0; |
1192 | } | |
1193 | ||
00a7760e JK |
1194 | static int unpack_loose_header_to_strbuf(git_zstream *stream, unsigned char *map, |
1195 | unsigned long mapsize, void *buffer, | |
1196 | unsigned long bufsiz, struct strbuf *header) | |
d131b7af | 1197 | { |
46f03448 KN |
1198 | int status; |
1199 | ||
00a7760e | 1200 | status = unpack_loose_short_header(stream, map, mapsize, buffer, bufsiz); |
d21f8426 JH |
1201 | if (status < Z_OK) |
1202 | return -1; | |
d131b7af | 1203 | |
46f03448 KN |
1204 | /* |
1205 | * Check if entire header is unpacked in the first iteration. | |
d131b7af | 1206 | */ |
46f03448 KN |
1207 | if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) |
1208 | return 0; | |
d131b7af | 1209 | |
46f03448 KN |
1210 | /* |
1211 | * buffer[0..bufsiz] was not large enough. Copy the partial | |
1212 | * result out to header, and then append the result of further | |
1213 | * reading the stream. | |
1214 | */ | |
1215 | strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer); | |
1216 | stream->next_out = buffer; | |
1217 | stream->avail_out = bufsiz; | |
d131b7af | 1218 | |
46f03448 | 1219 | do { |
31877c9a | 1220 | obj_read_unlock(); |
46f03448 | 1221 | status = git_inflate(stream, 0); |
31877c9a | 1222 | obj_read_lock(); |
46f03448 KN |
1223 | strbuf_add(header, buffer, stream->next_out - (unsigned char *)buffer); |
1224 | if (memchr(buffer, '\0', stream->next_out - (unsigned char *)buffer)) | |
1225 | return 0; | |
1226 | stream->next_out = buffer; | |
1227 | stream->avail_out = bufsiz; | |
1228 | } while (status != Z_STREAM_END); | |
1229 | return -1; | |
d131b7af SP |
1230 | } |
1231 | ||
00a7760e JK |
1232 | static void *unpack_loose_rest(git_zstream *stream, |
1233 | void *buffer, unsigned long size, | |
1234 | const struct object_id *oid) | |
95099731 | 1235 | { |
5180cacc | 1236 | int bytes = strlen(buffer) + 1; |
3aee68aa | 1237 | unsigned char *buf = xmallocz(size); |
93821bd9 | 1238 | unsigned long n; |
7efbff75 | 1239 | int status = Z_OK; |
95099731 | 1240 | |
93821bd9 LT |
1241 | n = stream->total_out - bytes; |
1242 | if (n > size) | |
1243 | n = size; | |
1244 | memcpy(buf, (char *) buffer + bytes, n); | |
1245 | bytes = n; | |
456cdf6e LT |
1246 | if (bytes <= size) { |
1247 | /* | |
1248 | * The above condition must be (bytes <= size), not | |
1249 | * (bytes < size). In other words, even though we | |
ccf5ace0 | 1250 | * expect no more output and set avail_out to zero, |
456cdf6e LT |
1251 | * the input zlib stream may have bytes that express |
1252 | * "this concludes the stream", and we *do* want to | |
1253 | * eat that input. | |
1254 | * | |
1255 | * Otherwise we would not be able to test that we | |
1256 | * consumed all the input to reach the expected size; | |
1257 | * we also want to check that zlib tells us that all | |
1258 | * went well with status == Z_STREAM_END at the end. | |
1259 | */ | |
5180cacc LT |
1260 | stream->next_out = buf + bytes; |
1261 | stream->avail_out = size - bytes; | |
31877c9a MT |
1262 | while (status == Z_OK) { |
1263 | obj_read_unlock(); | |
39c68542 | 1264 | status = git_inflate(stream, Z_FINISH); |
31877c9a MT |
1265 | obj_read_lock(); |
1266 | } | |
5180cacc | 1267 | } |
456cdf6e | 1268 | if (status == Z_STREAM_END && !stream->avail_in) { |
39c68542 | 1269 | git_inflate_end(stream); |
7efbff75 | 1270 | return buf; |
95099731 NTND |
1271 | } |
1272 | ||
7efbff75 | 1273 | if (status < 0) |
00a7760e | 1274 | error(_("corrupt loose object '%s'"), oid_to_hex(oid)); |
7efbff75 | 1275 | else if (stream->avail_in) |
259328b7 | 1276 | error(_("garbage at end of loose object '%s'"), |
00a7760e | 1277 | oid_to_hex(oid)); |
7efbff75 JH |
1278 | free(buf); |
1279 | return NULL; | |
95099731 NTND |
1280 | } |
1281 | ||
d40d535b | 1282 | /* |
5180cacc LT |
1283 | * We used to just use "sscanf()", but that's actually way |
1284 | * too permissive for what we want to check. So do an anal | |
1285 | * object header parse by hand. | |
d40d535b | 1286 | */ |
00a7760e JK |
1287 | static int parse_loose_header_extended(const char *hdr, struct object_info *oi, |
1288 | unsigned int flags) | |
1f688557 | 1289 | { |
46f03448 | 1290 | const char *type_buf = hdr; |
5180cacc | 1291 | unsigned long size; |
46f03448 | 1292 | int type, type_len = 0; |
43057304 | 1293 | |
5180cacc | 1294 | /* |
46f03448 | 1295 | * The type can be of any size but is followed by |
21666f1a | 1296 | * a space. |
5180cacc | 1297 | */ |
5180cacc LT |
1298 | for (;;) { |
1299 | char c = *hdr++; | |
d21f8426 JH |
1300 | if (!c) |
1301 | return -1; | |
5180cacc LT |
1302 | if (c == ' ') |
1303 | break; | |
46f03448 | 1304 | type_len++; |
5180cacc | 1305 | } |
1f688557 | 1306 | |
46f03448 | 1307 | type = type_from_string_gently(type_buf, type_len, 1); |
6ca32f47 BW |
1308 | if (oi->type_name) |
1309 | strbuf_add(oi->type_name, type_buf, type_len); | |
46f03448 KN |
1310 | /* |
1311 | * Set type to 0 if its an unknown object and | |
2e3a16b2 | 1312 | * we're obtaining the type using '--allow-unknown-type' |
46f03448 KN |
1313 | * option. |
1314 | */ | |
19fc5e84 | 1315 | if ((flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE) && (type < 0)) |
46f03448 KN |
1316 | type = 0; |
1317 | else if (type < 0) | |
259328b7 | 1318 | die(_("invalid object type")); |
46f03448 KN |
1319 | if (oi->typep) |
1320 | *oi->typep = type; | |
5180cacc LT |
1321 | |
1322 | /* | |
1323 | * The length must follow immediately, and be in canonical | |
1324 | * decimal format (ie "010" is not valid). | |
1325 | */ | |
1326 | size = *hdr++ - '0'; | |
1327 | if (size > 9) | |
1328 | return -1; | |
1329 | if (size) { | |
1330 | for (;;) { | |
1331 | unsigned long c = *hdr - '0'; | |
1332 | if (c > 9) | |
1333 | break; | |
1334 | hdr++; | |
1335 | size = size * 10 + c; | |
1b1005d1 | 1336 | } |
c01f51cc | 1337 | } |
46f03448 KN |
1338 | |
1339 | if (oi->sizep) | |
1340 | *oi->sizep = size; | |
5180cacc LT |
1341 | |
1342 | /* | |
1343 | * The length must be followed by a zero byte | |
1344 | */ | |
46f03448 | 1345 | return *hdr ? -1 : type; |
1f688557 JH |
1346 | } |
1347 | ||
00a7760e | 1348 | int parse_loose_header(const char *hdr, unsigned long *sizep) |
bf592c50 | 1349 | { |
27b5c1a0 | 1350 | struct object_info oi = OBJECT_INFO_INIT; |
21666f1a | 1351 | |
46f03448 | 1352 | oi.sizep = sizep; |
00a7760e | 1353 | return parse_loose_header_extended(hdr, &oi, 0); |
bf592c50 | 1354 | } |
1355 | ||
514c5fdd JK |
1356 | static int loose_object_info(struct repository *r, |
1357 | const struct object_id *oid, | |
1358 | struct object_info *oi, int flags) | |
65c2e0c3 | 1359 | { |
46f03448 KN |
1360 | int status = 0; |
1361 | unsigned long mapsize; | |
65c2e0c3 | 1362 | void *map; |
ef49a7a0 | 1363 | git_zstream stream; |
1af64f73 | 1364 | char hdr[MAX_HEADER_LEN]; |
46f03448 | 1365 | struct strbuf hdrbuf = STRBUF_INIT; |
c84a1f3e | 1366 | unsigned long size_scratch; |
65c2e0c3 | 1367 | |
b99b6bcc JK |
1368 | if (oi->delta_base_oid) |
1369 | oidclr(oi->delta_base_oid); | |
5d642e75 | 1370 | |
052fe5ea JK |
1371 | /* |
1372 | * If we don't care about type or size, then we don't | |
4ef8d1dd JH |
1373 | * need to look inside the object at all. Note that we |
1374 | * do not optimize out the stat call, even if the | |
1375 | * caller doesn't care about the disk-size, since our | |
1376 | * return value implicitly indicates whether the | |
1377 | * object even exists. | |
052fe5ea | 1378 | */ |
6ca32f47 | 1379 | if (!oi->typep && !oi->type_name && !oi->sizep && !oi->contentp) { |
771e7d57 | 1380 | const char *path; |
4ef8d1dd | 1381 | struct stat st; |
61c7711c | 1382 | if (!oi->disk_sizep && (flags & OBJECT_INFO_QUICK)) |
d7a24573 | 1383 | return quick_has_loose(r, oid) ? 0 : -1; |
514c5fdd | 1384 | if (stat_loose_object(r, oid, &st, &path) < 0) |
4ef8d1dd JH |
1385 | return -1; |
1386 | if (oi->disk_sizep) | |
23c339c0 | 1387 | *oi->disk_sizep = st.st_size; |
052fe5ea JK |
1388 | return 0; |
1389 | } | |
1390 | ||
514c5fdd | 1391 | map = map_loose_object(r, oid, &mapsize); |
f0df4ed5 | 1392 | if (!map) |
dbea72a8 | 1393 | return -1; |
c84a1f3e JT |
1394 | |
1395 | if (!oi->sizep) | |
1396 | oi->sizep = &size_scratch; | |
1397 | ||
23c339c0 JK |
1398 | if (oi->disk_sizep) |
1399 | *oi->disk_sizep = mapsize; | |
19fc5e84 | 1400 | if ((flags & OBJECT_INFO_ALLOW_UNKNOWN_TYPE)) { |
00a7760e | 1401 | if (unpack_loose_header_to_strbuf(&stream, map, mapsize, hdr, sizeof(hdr), &hdrbuf) < 0) |
259328b7 | 1402 | status = error(_("unable to unpack %s header with --allow-unknown-type"), |
514c5fdd | 1403 | oid_to_hex(oid)); |
00a7760e | 1404 | } else if (unpack_loose_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) |
259328b7 | 1405 | status = error(_("unable to unpack %s header"), |
514c5fdd | 1406 | oid_to_hex(oid)); |
46f03448 KN |
1407 | if (status < 0) |
1408 | ; /* Do nothing */ | |
1409 | else if (hdrbuf.len) { | |
00a7760e | 1410 | if ((status = parse_loose_header_extended(hdrbuf.buf, oi, flags)) < 0) |
259328b7 | 1411 | status = error(_("unable to parse %s header with --allow-unknown-type"), |
514c5fdd | 1412 | oid_to_hex(oid)); |
00a7760e | 1413 | } else if ((status = parse_loose_header_extended(hdr, oi, flags)) < 0) |
514c5fdd | 1414 | status = error(_("unable to parse %s header"), oid_to_hex(oid)); |
c84a1f3e | 1415 | |
b3ea7dd3 | 1416 | if (status >= 0 && oi->contentp) { |
00a7760e JK |
1417 | *oi->contentp = unpack_loose_rest(&stream, hdr, |
1418 | *oi->sizep, oid); | |
b3ea7dd3 JK |
1419 | if (!*oi->contentp) { |
1420 | git_inflate_end(&stream); | |
1421 | status = -1; | |
1422 | } | |
1423 | } else | |
c84a1f3e JT |
1424 | git_inflate_end(&stream); |
1425 | ||
65c2e0c3 | 1426 | munmap(map, mapsize); |
46f03448 | 1427 | if (status && oi->typep) |
23c339c0 | 1428 | *oi->typep = status; |
c84a1f3e JT |
1429 | if (oi->sizep == &size_scratch) |
1430 | oi->sizep = NULL; | |
46f03448 | 1431 | strbuf_release(&hdrbuf); |
3ab0fb06 | 1432 | oi->whence = OI_LOOSE; |
93cff9a9 | 1433 | return (status < 0) ? status : 0; |
65c2e0c3 JH |
1434 | } |
1435 | ||
31877c9a MT |
1436 | int obj_read_use_lock = 0; |
1437 | pthread_mutex_t obj_read_mutex; | |
1438 | ||
1439 | void enable_obj_read_lock(void) | |
1440 | { | |
1441 | if (obj_read_use_lock) | |
1442 | return; | |
1443 | ||
1444 | obj_read_use_lock = 1; | |
1445 | init_recursive_mutex(&obj_read_mutex); | |
1446 | } | |
1447 | ||
1448 | void disable_obj_read_lock(void) | |
1449 | { | |
1450 | if (!obj_read_use_lock) | |
1451 | return; | |
1452 | ||
1453 | obj_read_use_lock = 0; | |
1454 | pthread_mutex_destroy(&obj_read_mutex); | |
1455 | } | |
1456 | ||
8b4c0103 JT |
1457 | int fetch_if_missing = 1; |
1458 | ||
31877c9a MT |
1459 | static int do_oid_object_info_extended(struct repository *r, |
1460 | const struct object_id *oid, | |
1461 | struct object_info *oi, unsigned flags) | |
f0df4ed5 | 1462 | { |
cd585e2a | 1463 | static struct object_info blank_oi = OBJECT_INFO_INIT; |
9c8a294a | 1464 | struct cached_object *co; |
f0df4ed5 | 1465 | struct pack_entry e; |
5b086407 | 1466 | int rtype; |
b383a13c | 1467 | const struct object_id *real = oid; |
8b4c0103 | 1468 | int already_retried = 0; |
f0df4ed5 | 1469 | |
31877c9a | 1470 | |
b383a13c | 1471 | if (flags & OBJECT_INFO_LOOKUP_REPLACE) |
9d98354f | 1472 | real = lookup_replace_object(r, oid); |
f0df4ed5 | 1473 | |
b383a13c | 1474 | if (is_null_oid(real)) |
87b5e236 JK |
1475 | return -1; |
1476 | ||
cd585e2a JT |
1477 | if (!oi) |
1478 | oi = &blank_oi; | |
1479 | ||
9c8a294a JT |
1480 | co = find_cached_object(real); |
1481 | if (co) { | |
1482 | if (oi->typep) | |
1483 | *(oi->typep) = co->type; | |
1484 | if (oi->sizep) | |
1485 | *(oi->sizep) = co->size; | |
1486 | if (oi->disk_sizep) | |
1487 | *(oi->disk_sizep) = 0; | |
b99b6bcc JK |
1488 | if (oi->delta_base_oid) |
1489 | oidclr(oi->delta_base_oid); | |
9c8a294a JT |
1490 | if (oi->type_name) |
1491 | strbuf_addstr(oi->type_name, type_name(co->type)); | |
1492 | if (oi->contentp) | |
1493 | *oi->contentp = xmemdupz(co->buf, co->size); | |
1494 | oi->whence = OI_CACHED; | |
1495 | return 0; | |
c4d9986f NTND |
1496 | } |
1497 | ||
8b4c0103 | 1498 | while (1) { |
42c8ce1c | 1499 | if (find_pack_entry(r, real, &e)) |
8b4c0103 JT |
1500 | break; |
1501 | ||
024aa469 TI |
1502 | if (flags & OBJECT_INFO_IGNORE_LOOSE) |
1503 | return -1; | |
1504 | ||
ddd63e64 | 1505 | /* Most likely it's a loose object. */ |
514c5fdd | 1506 | if (!loose_object_info(r, real, oi, flags)) |
5b086407 | 1507 | return 0; |
ddd63e64 SG |
1508 | |
1509 | /* Not a loose object; someone else may have just packed it. */ | |
2b7750c9 | 1510 | if (!(flags & OBJECT_INFO_QUICK)) { |
9d98354f | 1511 | reprepare_packed_git(r); |
42c8ce1c | 1512 | if (find_pack_entry(r, real, &e)) |
2b7750c9 JT |
1513 | break; |
1514 | } | |
8b4c0103 JT |
1515 | |
1516 | /* Check if it is a missing object */ | |
b14ed5ad | 1517 | if (fetch_if_missing && has_promisor_remote() && |
0f4a4fb1 | 1518 | !already_retried && r == the_repository && |
31f5256c | 1519 | !(flags & OBJECT_INFO_SKIP_FETCH_OBJECT)) { |
8b4c0103 | 1520 | /* |
b14ed5ad CC |
1521 | * TODO Investigate checking promisor_remote_get_direct() |
1522 | * TODO return value and stopping on error here. | |
1523 | * TODO Pass a repository struct through | |
1524 | * promisor_remote_get_direct(), such that arbitrary | |
1525 | * repositories work. | |
8b4c0103 | 1526 | */ |
b14ed5ad | 1527 | promisor_remote_get_direct(r, real, 1); |
8b4c0103 JT |
1528 | already_retried = 1; |
1529 | continue; | |
dfdd4afc | 1530 | } |
8b4c0103 JT |
1531 | |
1532 | return -1; | |
f0df4ed5 | 1533 | } |
3d77d877 | 1534 | |
cd585e2a JT |
1535 | if (oi == &blank_oi) |
1536 | /* | |
1537 | * We know that the caller doesn't actually need the | |
1538 | * information below, so return early. | |
1539 | */ | |
1540 | return 0; | |
9d98354f | 1541 | rtype = packed_object_info(r, e.p, e.offset, oi); |
412916ee | 1542 | if (rtype < 0) { |
b383a13c | 1543 | mark_bad_packed_object(e.p, real->hash); |
31877c9a | 1544 | return do_oid_object_info_extended(r, real, oi, 0); |
3ab0fb06 | 1545 | } else if (oi->whence == OI_PACKED) { |
9a490590 JH |
1546 | oi->u.packed.offset = e.offset; |
1547 | oi->u.packed.pack = e.p; | |
1548 | oi->u.packed.is_delta = (rtype == OBJ_REF_DELTA || | |
1549 | rtype == OBJ_OFS_DELTA); | |
3d77d877 NP |
1550 | } |
1551 | ||
5b086407 | 1552 | return 0; |
f0df4ed5 JS |
1553 | } |
1554 | ||
31877c9a MT |
1555 | int oid_object_info_extended(struct repository *r, const struct object_id *oid, |
1556 | struct object_info *oi, unsigned flags) | |
1557 | { | |
1558 | int ret; | |
1559 | obj_read_lock(); | |
1560 | ret = do_oid_object_info_extended(r, oid, oi, flags); | |
1561 | obj_read_unlock(); | |
1562 | return ret; | |
1563 | } | |
1564 | ||
1565 | ||
3fc0dca9 | 1566 | /* returns enum object_type or negative */ |
9d98354f SB |
1567 | int oid_object_info(struct repository *r, |
1568 | const struct object_id *oid, | |
1569 | unsigned long *sizep) | |
9a490590 | 1570 | { |
5b086407 | 1571 | enum object_type type; |
27b5c1a0 | 1572 | struct object_info oi = OBJECT_INFO_INIT; |
9a490590 | 1573 | |
5b086407 | 1574 | oi.typep = &type; |
9a490590 | 1575 | oi.sizep = sizep; |
9d98354f SB |
1576 | if (oid_object_info_extended(r, oid, &oi, |
1577 | OBJECT_INFO_LOOKUP_REPLACE) < 0) | |
5b086407 JK |
1578 | return -1; |
1579 | return type; | |
9a490590 JH |
1580 | } |
1581 | ||
1b9b5c69 | 1582 | static void *read_object(struct repository *r, |
cba595ab | 1583 | const struct object_id *oid, enum object_type *type, |
f1d8130b JT |
1584 | unsigned long *size) |
1585 | { | |
1586 | struct object_info oi = OBJECT_INFO_INIT; | |
1587 | void *content; | |
1588 | oi.typep = type; | |
1589 | oi.sizep = size; | |
1590 | oi.contentp = &content; | |
1591 | ||
cba595ab | 1592 | if (oid_object_info_extended(r, oid, &oi, 0) < 0) |
f1d8130b JT |
1593 | return NULL; |
1594 | return content; | |
1595 | } | |
1596 | ||
829e5c3b PO |
1597 | int pretend_object_file(void *buf, unsigned long len, enum object_type type, |
1598 | struct object_id *oid) | |
d66b37bb JH |
1599 | { |
1600 | struct cached_object *co; | |
1601 | ||
2dcde20e | 1602 | hash_object_file(the_hash_algo, buf, len, type_name(type), oid); |
98374a07 | 1603 | if (has_object_file(oid) || find_cached_object(oid)) |
d66b37bb | 1604 | return 0; |
c7353967 | 1605 | ALLOC_GROW(cached_objects, cached_object_nr + 1, cached_object_alloc); |
d66b37bb JH |
1606 | co = &cached_objects[cached_object_nr++]; |
1607 | co->size = len; | |
21666f1a | 1608 | co->type = type; |
efa13f7b JH |
1609 | co->buf = xmalloc(len); |
1610 | memcpy(co->buf, buf, len); | |
62ba93ea | 1611 | oidcpy(&co->oid, oid); |
d66b37bb JH |
1612 | return 0; |
1613 | } | |
1614 | ||
b6c4cecc JH |
1615 | /* |
1616 | * This function dies on corrupt objects; the callers who want to | |
1617 | * deal with them should arrange to call read_object() and give error | |
1618 | * messages themselves. | |
1619 | */ | |
a3b72c89 SB |
1620 | void *read_object_file_extended(struct repository *r, |
1621 | const struct object_id *oid, | |
b4f5aca4 | 1622 | enum object_type *type, |
1623 | unsigned long *size, | |
1624 | int lookup_replace) | |
ac939109 | 1625 | { |
3ba7a065 | 1626 | void *data; |
b6c4cecc | 1627 | const struct packed_git *p; |
771e7d57 JK |
1628 | const char *path; |
1629 | struct stat st; | |
1f2e7cea | 1630 | const struct object_id *repl = lookup_replace ? |
a3b72c89 | 1631 | lookup_replace_object(r, oid) : oid; |
b6c4cecc | 1632 | |
3ba7a065 | 1633 | errno = 0; |
cba595ab | 1634 | data = read_object(r, repl, type, size); |
4bbf5a26 | 1635 | if (data) |
b6c4cecc | 1636 | return data; |
68095570 | 1637 | |
31877c9a | 1638 | obj_read_lock(); |
25f3af3f | 1639 | if (errno && errno != ENOENT) |
259328b7 | 1640 | die_errno(_("failed to read object %s"), oid_to_hex(oid)); |
3ba7a065 | 1641 | |
68095570 | 1642 | /* die if we replaced an object with one that does not exist */ |
b383a13c | 1643 | if (repl != oid) |
259328b7 | 1644 | die(_("replacement %s not found for %s"), |
b383a13c | 1645 | oid_to_hex(repl), oid_to_hex(oid)); |
68095570 | 1646 | |
cba595ab | 1647 | if (!stat_loose_object(r, repl, &st, &path)) |
259328b7 | 1648 | die(_("loose object %s (stored in %s) is corrupt"), |
b383a13c | 1649 | oid_to_hex(repl), path); |
68095570 | 1650 | |
a3b72c89 | 1651 | if ((p = has_packed_and_bad(r, repl->hash)) != NULL) |
259328b7 | 1652 | die(_("packed object %s (stored in %s) is corrupt"), |
b383a13c | 1653 | oid_to_hex(repl), p->pack_name); |
31877c9a | 1654 | obj_read_unlock(); |
f5552aee | 1655 | |
b6c4cecc | 1656 | return NULL; |
ac939109 NP |
1657 | } |
1658 | ||
d3b4705a NTND |
1659 | void *read_object_with_reference(struct repository *r, |
1660 | const struct object_id *oid, | |
21666f1a | 1661 | const char *required_type_name, |
40469ee9 | 1662 | unsigned long *size, |
02f0547e | 1663 | struct object_id *actual_oid_return) |
f4913f91 | 1664 | { |
21666f1a | 1665 | enum object_type type, required_type; |
f4913f91 JH |
1666 | void *buffer; |
1667 | unsigned long isize; | |
02f0547e | 1668 | struct object_id actual_oid; |
f4913f91 | 1669 | |
21666f1a | 1670 | required_type = type_from_string(required_type_name); |
02f0547e | 1671 | oidcpy(&actual_oid, oid); |
40469ee9 JH |
1672 | while (1) { |
1673 | int ref_length = -1; | |
1674 | const char *ref_type = NULL; | |
f4913f91 | 1675 | |
d3b4705a | 1676 | buffer = repo_read_object_file(r, &actual_oid, &type, &isize); |
40469ee9 JH |
1677 | if (!buffer) |
1678 | return NULL; | |
21666f1a | 1679 | if (type == required_type) { |
40469ee9 | 1680 | *size = isize; |
02f0547e | 1681 | if (actual_oid_return) |
1682 | oidcpy(actual_oid_return, &actual_oid); | |
40469ee9 JH |
1683 | return buffer; |
1684 | } | |
1685 | /* Handle references */ | |
21666f1a | 1686 | else if (type == OBJ_COMMIT) |
40469ee9 | 1687 | ref_type = "tree "; |
21666f1a | 1688 | else if (type == OBJ_TAG) |
40469ee9 JH |
1689 | ref_type = "object "; |
1690 | else { | |
1691 | free(buffer); | |
1692 | return NULL; | |
1693 | } | |
1694 | ref_length = strlen(ref_type); | |
f4913f91 | 1695 | |
94b5e093 | 1696 | if (ref_length + the_hash_algo->hexsz > isize || |
50974ec9 | 1697 | memcmp(buffer, ref_type, ref_length) || |
02f0547e | 1698 | get_oid_hex((char *) buffer + ref_length, &actual_oid)) { |
40469ee9 JH |
1699 | free(buffer); |
1700 | return NULL; | |
1701 | } | |
1cf58e72 | 1702 | free(buffer); |
40469ee9 | 1703 | /* Now we have the ID of the referred-to object in |
02f0547e | 1704 | * actual_oid. Check again. */ |
f4913f91 | 1705 | } |
f4913f91 JH |
1706 | } |
1707 | ||
7ad5c44d MT |
1708 | static void write_object_file_prepare(const struct git_hash_algo *algo, |
1709 | const void *buf, unsigned long len, | |
a09c985e PO |
1710 | const char *type, struct object_id *oid, |
1711 | char *hdr, int *hdrlen) | |
d410c0f5 | 1712 | { |
18e2588e | 1713 | git_hash_ctx c; |
d410c0f5 JH |
1714 | |
1715 | /* Generate the header */ | |
ca473cef | 1716 | *hdrlen = xsnprintf(hdr, *hdrlen, "%s %"PRIuMAX , type, (uintmax_t)len)+1; |
d410c0f5 JH |
1717 | |
1718 | /* Sha1.. */ | |
7ad5c44d MT |
1719 | algo->init_fn(&c); |
1720 | algo->update_fn(&c, hdr, *hdrlen); | |
1721 | algo->update_fn(&c, buf, len); | |
1722 | algo->final_fn(oid->hash, &c); | |
d410c0f5 JH |
1723 | } |
1724 | ||
230f1322 | 1725 | /* |
5a688fe4 | 1726 | * Move the just written object into its final resting place. |
230f1322 | 1727 | */ |
cb5add58 | 1728 | int finalize_object_file(const char *tmpfile, const char *filename) |
230f1322 | 1729 | { |
e32c0a9c | 1730 | int ret = 0; |
5a688fe4 | 1731 | |
348df166 | 1732 | if (object_creation_mode == OBJECT_CREATION_USES_RENAMES) |
be66a6c4 JS |
1733 | goto try_rename; |
1734 | else if (link(tmpfile, filename)) | |
e32c0a9c | 1735 | ret = errno; |
7ebb6fca LT |
1736 | |
1737 | /* | |
1738 | * Coda hack - coda doesn't like cross-directory links, | |
1739 | * so we fall back to a rename, which will mean that it | |
1740 | * won't be able to check collisions, but that's not a | |
1741 | * big deal. | |
1742 | * | |
1743 | * The same holds for FAT formatted media. | |
1744 | * | |
3be1f18e | 1745 | * When this succeeds, we just return. We have nothing |
7ebb6fca LT |
1746 | * left to unlink. |
1747 | */ | |
1748 | if (ret && ret != EEXIST) { | |
be66a6c4 | 1749 | try_rename: |
7ebb6fca | 1750 | if (!rename(tmpfile, filename)) |
3be1f18e | 1751 | goto out; |
9e48b389 | 1752 | ret = errno; |
230f1322 | 1753 | } |
691f1a28 | 1754 | unlink_or_warn(tmpfile); |
230f1322 LT |
1755 | if (ret) { |
1756 | if (ret != EEXIST) { | |
2c319886 | 1757 | return error_errno(_("unable to write file %s"), filename); |
230f1322 LT |
1758 | } |
1759 | /* FIXME!!! Collision check here ? */ | |
1760 | } | |
1761 | ||
3be1f18e | 1762 | out: |
5256b006 | 1763 | if (adjust_shared_perm(filename)) |
259328b7 | 1764 | return error(_("unable to set permission to '%s'"), filename); |
230f1322 LT |
1765 | return 0; |
1766 | } | |
1767 | ||
4d548150 LT |
1768 | static int write_buffer(int fd, const void *buf, size_t len) |
1769 | { | |
d34cf19b | 1770 | if (write_in_full(fd, buf, len) < 0) |
259328b7 | 1771 | return error_errno(_("file write error")); |
4d548150 LT |
1772 | return 0; |
1773 | } | |
1774 | ||
2dcde20e MT |
1775 | int hash_object_file(const struct git_hash_algo *algo, const void *buf, |
1776 | unsigned long len, const char *type, | |
f070facc | 1777 | struct object_id *oid) |
abdc3fc8 | 1778 | { |
1af64f73 | 1779 | char hdr[MAX_HEADER_LEN]; |
ef1286d3 | 1780 | int hdrlen = sizeof(hdr); |
2dcde20e | 1781 | write_object_file_prepare(algo, buf, len, type, oid, hdr, &hdrlen); |
abdc3fc8 RS |
1782 | return 0; |
1783 | } | |
1784 | ||
e9039dd3 | 1785 | /* Finalize a file on disk, and close it. */ |
514c5fdd | 1786 | static void close_loose_object(int fd) |
e9039dd3 | 1787 | { |
aafe9fba | 1788 | if (fsync_object_files) |
76011357 | 1789 | fsync_or_die(fd, "loose object file"); |
e9039dd3 | 1790 | if (close(fd) != 0) |
76011357 | 1791 | die_errno(_("error when closing loose object file")); |
e9039dd3 LT |
1792 | } |
1793 | ||
5723fe7e LT |
1794 | /* Size of directory component, including the ending '/' */ |
1795 | static inline int directory_size(const char *filename) | |
1796 | { | |
1797 | const char *s = strrchr(filename, '/'); | |
1798 | if (!s) | |
1799 | return 0; | |
1800 | return s - filename + 1; | |
1801 | } | |
1802 | ||
1803 | /* | |
1804 | * This creates a temporary file in the same directory as the final | |
1805 | * 'filename' | |
1806 | * | |
1807 | * We want to avoid cross-directory filename renames, because those | |
1808 | * can have problems on various filesystems (FAT, NFS, Coda). | |
1809 | */ | |
d4b3d11a | 1810 | static int create_tmpfile(struct strbuf *tmp, const char *filename) |
5723fe7e LT |
1811 | { |
1812 | int fd, dirlen = directory_size(filename); | |
1813 | ||
d4b3d11a JK |
1814 | strbuf_reset(tmp); |
1815 | strbuf_add(tmp, filename, dirlen); | |
1816 | strbuf_addstr(tmp, "tmp_obj_XXXXXX"); | |
1817 | fd = git_mkstemp_mode(tmp->buf, 0444); | |
cbacbf4e | 1818 | if (fd < 0 && dirlen && errno == ENOENT) { |
d4b3d11a JK |
1819 | /* |
1820 | * Make sure the directory exists; note that the contents | |
1821 | * of the buffer are undefined after mkstemp returns an | |
1822 | * error, so we have to rewrite the whole buffer from | |
1823 | * scratch. | |
1824 | */ | |
1825 | strbuf_reset(tmp); | |
1826 | strbuf_add(tmp, filename, dirlen - 1); | |
1827 | if (mkdir(tmp->buf, 0777) && errno != EEXIST) | |
b2476a60 | 1828 | return -1; |
d4b3d11a | 1829 | if (adjust_shared_perm(tmp->buf)) |
5723fe7e LT |
1830 | return -1; |
1831 | ||
1832 | /* Try again */ | |
d4b3d11a JK |
1833 | strbuf_addstr(tmp, "/tmp_obj_XXXXXX"); |
1834 | fd = git_mkstemp_mode(tmp->buf, 0444); | |
5723fe7e LT |
1835 | } |
1836 | return fd; | |
1837 | } | |
1838 | ||
3fc7281f PO |
1839 | static int write_loose_object(const struct object_id *oid, char *hdr, |
1840 | int hdrlen, const void *buf, unsigned long len, | |
1841 | time_t mtime) | |
0fcfd160 | 1842 | { |
915308b1 | 1843 | int fd, ret; |
9892beba | 1844 | unsigned char compressed[4096]; |
ef49a7a0 | 1845 | git_zstream stream; |
18e2588e | 1846 | git_hash_ctx c; |
3fc7281f | 1847 | struct object_id parano_oid; |
d4b3d11a | 1848 | static struct strbuf tmp_file = STRBUF_INIT; |
ea657730 CC |
1849 | static struct strbuf filename = STRBUF_INIT; |
1850 | ||
514c5fdd | 1851 | loose_object_path(the_repository, &filename, oid); |
a44c9a5e | 1852 | |
ea657730 | 1853 | fd = create_tmpfile(&tmp_file, filename.buf); |
aac17941 | 1854 | if (fd < 0) { |
35243577 | 1855 | if (errno == EACCES) |
259328b7 | 1856 | return error(_("insufficient permission for adding an object to repository database %s"), get_object_directory()); |
916d081b | 1857 | else |
259328b7 | 1858 | return error_errno(_("unable to create temporary file")); |
aac17941 LT |
1859 | } |
1860 | ||
0fcfd160 | 1861 | /* Set it up */ |
55bb5c91 | 1862 | git_deflate_init(&stream, zlib_compression_level); |
0fcfd160 | 1863 | stream.next_out = compressed; |
9892beba | 1864 | stream.avail_out = sizeof(compressed); |
18e2588e | 1865 | the_hash_algo->init_fn(&c); |
a44c9a5e LT |
1866 | |
1867 | /* First header.. */ | |
d65a16f6 | 1868 | stream.next_in = (unsigned char *)hdr; |
a44c9a5e | 1869 | stream.avail_in = hdrlen; |
55bb5c91 JH |
1870 | while (git_deflate(&stream, 0) == Z_OK) |
1871 | ; /* nothing */ | |
18e2588e | 1872 | the_hash_algo->update_fn(&c, hdr, hdrlen); |
a44c9a5e LT |
1873 | |
1874 | /* Then the data itself.. */ | |
c00e657d | 1875 | stream.next_in = (void *)buf; |
a44c9a5e | 1876 | stream.avail_in = len; |
9892beba | 1877 | do { |
748af44c | 1878 | unsigned char *in0 = stream.next_in; |
55bb5c91 | 1879 | ret = git_deflate(&stream, Z_FINISH); |
18e2588e | 1880 | the_hash_algo->update_fn(&c, in0, stream.next_in - in0); |
9892beba | 1881 | if (write_buffer(fd, compressed, stream.next_out - compressed) < 0) |
76011357 | 1882 | die(_("unable to write loose object file")); |
9892beba NP |
1883 | stream.next_out = compressed; |
1884 | stream.avail_out = sizeof(compressed); | |
1885 | } while (ret == Z_OK); | |
1886 | ||
ac54c277 | 1887 | if (ret != Z_STREAM_END) |
259328b7 | 1888 | die(_("unable to deflate new object %s (%d)"), oid_to_hex(oid), |
3fc7281f | 1889 | ret); |
55bb5c91 | 1890 | ret = git_deflate_end_gently(&stream); |
ac54c277 | 1891 | if (ret != Z_OK) |
259328b7 | 1892 | die(_("deflateEnd on object %s failed (%d)"), oid_to_hex(oid), |
3fc7281f | 1893 | ret); |
18e2588e | 1894 | the_hash_algo->final_fn(parano_oid.hash, &c); |
9001dc2a | 1895 | if (!oideq(oid, ¶no_oid)) |
259328b7 | 1896 | die(_("confused by unstable object source data for %s"), |
3fc7281f | 1897 | oid_to_hex(oid)); |
ac54c277 | 1898 | |
514c5fdd | 1899 | close_loose_object(fd); |
0fcfd160 | 1900 | |
bbac7311 NP |
1901 | if (mtime) { |
1902 | struct utimbuf utb; | |
1903 | utb.actime = mtime; | |
1904 | utb.modtime = mtime; | |
d4b3d11a | 1905 | if (utime(tmp_file.buf, &utb) < 0) |
259328b7 | 1906 | warning_errno(_("failed utime() on %s"), tmp_file.buf); |
bbac7311 NP |
1907 | } |
1908 | ||
ea657730 | 1909 | return finalize_object_file(tmp_file.buf, filename.buf); |
0fcfd160 | 1910 | } |
8237b185 | 1911 | |
6862ebbf | 1912 | static int freshen_loose_object(const struct object_id *oid) |
33d4221c | 1913 | { |
6862ebbf | 1914 | return check_and_freshen(oid, 1); |
33d4221c JK |
1915 | } |
1916 | ||
6862ebbf | 1917 | static int freshen_packed_object(const struct object_id *oid) |
33d4221c JK |
1918 | { |
1919 | struct pack_entry e; | |
544443cb | 1920 | if (!find_pack_entry(the_repository, oid, &e)) |
ee1c6c34 JK |
1921 | return 0; |
1922 | if (e.p->freshened) | |
1923 | return 1; | |
1924 | if (!freshen_file(e.p->pack_name)) | |
1925 | return 0; | |
1926 | e.p->freshened = 1; | |
1927 | return 1; | |
33d4221c JK |
1928 | } |
1929 | ||
a09c985e PO |
1930 | int write_object_file(const void *buf, unsigned long len, const char *type, |
1931 | struct object_id *oid) | |
bbac7311 | 1932 | { |
1af64f73 | 1933 | char hdr[MAX_HEADER_LEN]; |
ef1286d3 | 1934 | int hdrlen = sizeof(hdr); |
bbac7311 NP |
1935 | |
1936 | /* Normally if we have it in the pack then we do not bother writing | |
1937 | * it out into .git/objects/??/?{38} file. | |
1938 | */ | |
7ad5c44d MT |
1939 | write_object_file_prepare(the_hash_algo, buf, len, type, oid, hdr, |
1940 | &hdrlen); | |
6862ebbf | 1941 | if (freshen_packed_object(oid) || freshen_loose_object(oid)) |
bbac7311 | 1942 | return 0; |
3fc7281f | 1943 | return write_loose_object(oid, hdr, hdrlen, buf, len, 0); |
bbac7311 NP |
1944 | } |
1945 | ||
1752cbbc PO |
1946 | int hash_object_file_literally(const void *buf, unsigned long len, |
1947 | const char *type, struct object_id *oid, | |
1948 | unsigned flags) | |
0c3db67c ES |
1949 | { |
1950 | char *header; | |
1951 | int hdrlen, status = 0; | |
1952 | ||
1953 | /* type string, SP, %lu of the length plus NUL must fit this */ | |
1af64f73 | 1954 | hdrlen = strlen(type) + MAX_HEADER_LEN; |
ef1286d3 | 1955 | header = xmalloc(hdrlen); |
7ad5c44d MT |
1956 | write_object_file_prepare(the_hash_algo, buf, len, type, oid, header, |
1957 | &hdrlen); | |
0c3db67c ES |
1958 | |
1959 | if (!(flags & HASH_WRITE_OBJECT)) | |
1960 | goto cleanup; | |
6862ebbf | 1961 | if (freshen_packed_object(oid) || freshen_loose_object(oid)) |
0c3db67c | 1962 | goto cleanup; |
3fc7281f | 1963 | status = write_loose_object(oid, header, hdrlen, buf, len, 0); |
0c3db67c ES |
1964 | |
1965 | cleanup: | |
1966 | free(header); | |
1967 | return status; | |
1968 | } | |
1969 | ||
4bdb70a4 | 1970 | int force_object_loose(const struct object_id *oid, time_t mtime) |
bbac7311 | 1971 | { |
bbac7311 NP |
1972 | void *buf; |
1973 | unsigned long len; | |
1974 | enum object_type type; | |
1af64f73 | 1975 | char hdr[MAX_HEADER_LEN]; |
bbac7311 | 1976 | int hdrlen; |
1fb23e65 | 1977 | int ret; |
bbac7311 | 1978 | |
6862ebbf | 1979 | if (has_loose_object(oid)) |
bbac7311 | 1980 | return 0; |
cba595ab | 1981 | buf = read_object(the_repository, oid, &type, &len); |
bbac7311 | 1982 | if (!buf) |
2c319886 | 1983 | return error(_("cannot read object for %s"), oid_to_hex(oid)); |
ca473cef | 1984 | hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %"PRIuMAX , type_name(type), (uintmax_t)len) + 1; |
3fc7281f | 1985 | ret = write_loose_object(oid, hdr, hdrlen, buf, len, mtime); |
1fb23e65 BS |
1986 | free(buf); |
1987 | ||
1988 | return ret; | |
bbac7311 NP |
1989 | } |
1990 | ||
cba595ab JH |
1991 | int repo_has_object_file_with_flags(struct repository *r, |
1992 | const struct object_id *oid, int flags) | |
8237b185 | 1993 | { |
3e8b7d3c JN |
1994 | if (!startup_info->have_repository) |
1995 | return 0; | |
9c8a294a | 1996 | return oid_object_info_extended(r, oid, NULL, flags) >= 0; |
b419aa25 | 1997 | } |
1998 | ||
9b45f499 SB |
1999 | int repo_has_object_file(struct repository *r, |
2000 | const struct object_id *oid) | |
b419aa25 | 2001 | { |
cba595ab | 2002 | return repo_has_object_file_with_flags(r, oid, 0); |
5827a035 JK |
2003 | } |
2004 | ||
c879daa2 NTND |
2005 | static void check_tree(const void *buf, size_t size) |
2006 | { | |
2007 | struct tree_desc desc; | |
2008 | struct name_entry entry; | |
2009 | ||
2010 | init_tree_desc(&desc, buf, size); | |
2011 | while (tree_entry(&desc, &entry)) | |
2012 | /* do nothing | |
2013 | * tree_entry() will die() on malformed entries */ | |
2014 | ; | |
2015 | } | |
2016 | ||
2017 | static void check_commit(const void *buf, size_t size) | |
2018 | { | |
2019 | struct commit c; | |
2020 | memset(&c, 0, sizeof(c)); | |
08f4f445 | 2021 | if (parse_commit_buffer(the_repository, &c, buf, size, 0)) |
259328b7 | 2022 | die(_("corrupt commit")); |
c879daa2 NTND |
2023 | } |
2024 | ||
2025 | static void check_tag(const void *buf, size_t size) | |
2026 | { | |
2027 | struct tag t; | |
2028 | memset(&t, 0, sizeof(t)); | |
0e740fed | 2029 | if (parse_tag_buffer(the_repository, &t, buf, size)) |
259328b7 | 2030 | die(_("corrupt tag")); |
c879daa2 NTND |
2031 | } |
2032 | ||
58bf2a4c NTND |
2033 | static int index_mem(struct index_state *istate, |
2034 | struct object_id *oid, void *buf, size_t size, | |
c4ce46fc JH |
2035 | enum object_type type, |
2036 | const char *path, unsigned flags) | |
e7332f96 | 2037 | { |
6c510bee | 2038 | int ret, re_allocated = 0; |
c4ce46fc | 2039 | int write_object = flags & HASH_WRITE_OBJECT; |
74400e71 | 2040 | |
7672db20 | 2041 | if (!type) |
edaec3fb | 2042 | type = OBJ_BLOB; |
6c510bee LT |
2043 | |
2044 | /* | |
2045 | * Convert blobs to git internal format | |
2046 | */ | |
43df4f86 | 2047 | if ((type == OBJ_BLOB) && path) { |
f285a2d7 | 2048 | struct strbuf nbuf = STRBUF_INIT; |
58bf2a4c | 2049 | if (convert_to_git(istate, path, buf, size, &nbuf, |
8462ff43 | 2050 | get_conv_flags(flags))) { |
b315c5c0 | 2051 | buf = strbuf_detach(&nbuf, &size); |
6c510bee LT |
2052 | re_allocated = 1; |
2053 | } | |
2054 | } | |
c4ce46fc | 2055 | if (flags & HASH_FORMAT_CHECK) { |
c879daa2 NTND |
2056 | if (type == OBJ_TREE) |
2057 | check_tree(buf, size); | |
2058 | if (type == OBJ_COMMIT) | |
2059 | check_commit(buf, size); | |
2060 | if (type == OBJ_TAG) | |
2061 | check_tag(buf, size); | |
2062 | } | |
6c510bee | 2063 | |
7672db20 | 2064 | if (write_object) |
169c9c01 | 2065 | ret = write_object_file(buf, size, type_name(type), oid); |
abdc3fc8 | 2066 | else |
2dcde20e MT |
2067 | ret = hash_object_file(the_hash_algo, buf, size, |
2068 | type_name(type), oid); | |
43df4f86 | 2069 | if (re_allocated) |
6c510bee | 2070 | free(buf); |
43df4f86 DP |
2071 | return ret; |
2072 | } | |
2073 | ||
58bf2a4c NTND |
2074 | static int index_stream_convert_blob(struct index_state *istate, |
2075 | struct object_id *oid, | |
2076 | int fd, | |
2077 | const char *path, | |
2078 | unsigned flags) | |
9035d75a SP |
2079 | { |
2080 | int ret; | |
2081 | const int write_object = flags & HASH_WRITE_OBJECT; | |
2082 | struct strbuf sbuf = STRBUF_INIT; | |
2083 | ||
2084 | assert(path); | |
58bf2a4c | 2085 | assert(would_convert_to_git_filter_fd(istate, path)); |
9035d75a | 2086 | |
58bf2a4c | 2087 | convert_to_git_filter_fd(istate, path, fd, &sbuf, |
8462ff43 | 2088 | get_conv_flags(flags)); |
9035d75a SP |
2089 | |
2090 | if (write_object) | |
169c9c01 | 2091 | ret = write_object_file(sbuf.buf, sbuf.len, type_name(OBJ_BLOB), |
a09c985e | 2092 | oid); |
9035d75a | 2093 | else |
2dcde20e MT |
2094 | ret = hash_object_file(the_hash_algo, sbuf.buf, sbuf.len, |
2095 | type_name(OBJ_BLOB), oid); | |
9035d75a SP |
2096 | strbuf_release(&sbuf); |
2097 | return ret; | |
2098 | } | |
2099 | ||
58bf2a4c NTND |
2100 | static int index_pipe(struct index_state *istate, struct object_id *oid, |
2101 | int fd, enum object_type type, | |
7b41e1e1 JH |
2102 | const char *path, unsigned flags) |
2103 | { | |
2104 | struct strbuf sbuf = STRBUF_INIT; | |
2105 | int ret; | |
2106 | ||
2107 | if (strbuf_read(&sbuf, fd, 4096) >= 0) | |
58bf2a4c | 2108 | ret = index_mem(istate, oid, sbuf.buf, sbuf.len, type, path, flags); |
7b41e1e1 JH |
2109 | else |
2110 | ret = -1; | |
2111 | strbuf_release(&sbuf); | |
2112 | return ret; | |
2113 | } | |
2114 | ||
ea68b0ce DP |
2115 | #define SMALL_FILE_SIZE (32*1024) |
2116 | ||
58bf2a4c NTND |
2117 | static int index_core(struct index_state *istate, |
2118 | struct object_id *oid, int fd, size_t size, | |
7b41e1e1 JH |
2119 | enum object_type type, const char *path, |
2120 | unsigned flags) | |
43df4f86 DP |
2121 | { |
2122 | int ret; | |
43df4f86 | 2123 | |
7b41e1e1 | 2124 | if (!size) { |
58bf2a4c | 2125 | ret = index_mem(istate, oid, "", size, type, path, flags); |
ea68b0ce DP |
2126 | } else if (size <= SMALL_FILE_SIZE) { |
2127 | char *buf = xmalloc(size); | |
90dca671 JK |
2128 | ssize_t read_result = read_in_full(fd, buf, size); |
2129 | if (read_result < 0) | |
259328b7 | 2130 | ret = error_errno(_("read error while indexing %s"), |
90dca671 JK |
2131 | path ? path : "<unknown>"); |
2132 | else if (read_result != size) | |
259328b7 | 2133 | ret = error(_("short read while indexing %s"), |
90dca671 | 2134 | path ? path : "<unknown>"); |
ea68b0ce | 2135 | else |
58bf2a4c | 2136 | ret = index_mem(istate, oid, buf, size, type, path, flags); |
ea68b0ce | 2137 | free(buf); |
08bda208 | 2138 | } else { |
43df4f86 | 2139 | void *buf = xmmap(NULL, size, PROT_READ, MAP_PRIVATE, fd, 0); |
58bf2a4c | 2140 | ret = index_mem(istate, oid, buf, size, type, path, flags); |
aac17941 | 2141 | munmap(buf, size); |
08bda208 | 2142 | } |
7b41e1e1 JH |
2143 | return ret; |
2144 | } | |
2145 | ||
4dd1fbc7 | 2146 | /* |
568508e7 JH |
2147 | * This creates one packfile per large blob unless bulk-checkin |
2148 | * machinery is "plugged". | |
4dd1fbc7 JH |
2149 | * |
2150 | * This also bypasses the usual "convert-to-git" dance, and that is on | |
2151 | * purpose. We could write a streaming version of the converting | |
2152 | * functions and insert that before feeding the data to fast-import | |
4f22b101 JK |
2153 | * (or equivalent in-core API described above). However, that is |
2154 | * somewhat complicated, as we do not know the size of the filter | |
2155 | * result, which we need to know beforehand when writing a git object. | |
2156 | * Since the primary motivation for trying to stream from the working | |
2157 | * tree file and to avoid mmaping it in core is to deal with large | |
2158 | * binary blobs, they generally do not want to get any conversion, and | |
2159 | * callers should avoid this code path when filters are requested. | |
4dd1fbc7 | 2160 | */ |
7d5e1dc3 | 2161 | static int index_stream(struct object_id *oid, int fd, size_t size, |
4dd1fbc7 JH |
2162 | enum object_type type, const char *path, |
2163 | unsigned flags) | |
2164 | { | |
68ee6dfc | 2165 | return index_bulk_checkin(oid, fd, size, type, path, flags); |
4dd1fbc7 JH |
2166 | } |
2167 | ||
58bf2a4c NTND |
2168 | int index_fd(struct index_state *istate, struct object_id *oid, |
2169 | int fd, struct stat *st, | |
7b41e1e1 JH |
2170 | enum object_type type, const char *path, unsigned flags) |
2171 | { | |
2172 | int ret; | |
7b41e1e1 | 2173 | |
9079ab7c SP |
2174 | /* |
2175 | * Call xsize_t() only when needed to avoid potentially unnecessary | |
2176 | * die() for large files. | |
2177 | */ | |
58bf2a4c NTND |
2178 | if (type == OBJ_BLOB && path && would_convert_to_git_filter_fd(istate, path)) |
2179 | ret = index_stream_convert_blob(istate, oid, fd, path, flags); | |
9035d75a | 2180 | else if (!S_ISREG(st->st_mode)) |
58bf2a4c | 2181 | ret = index_pipe(istate, oid, fd, type, path, flags); |
9079ab7c | 2182 | else if (st->st_size <= big_file_threshold || type != OBJ_BLOB || |
58bf2a4c NTND |
2183 | (path && would_convert_to_git(istate, path))) |
2184 | ret = index_core(istate, oid, fd, xsize_t(st->st_size), | |
2185 | type, path, flags); | |
4dd1fbc7 | 2186 | else |
7d5e1dc3 | 2187 | ret = index_stream(oid, fd, xsize_t(st->st_size), type, path, |
9079ab7c | 2188 | flags); |
43df4f86 | 2189 | close(fd); |
aac17941 | 2190 | return ret; |
74400e71 | 2191 | } |
ec1fcc16 | 2192 | |
58bf2a4c NTND |
2193 | int index_path(struct index_state *istate, struct object_id *oid, |
2194 | const char *path, struct stat *st, unsigned flags) | |
ec1fcc16 JH |
2195 | { |
2196 | int fd; | |
b760d3aa | 2197 | struct strbuf sb = STRBUF_INIT; |
ea8e0297 | 2198 | int rc = 0; |
ec1fcc16 JH |
2199 | |
2200 | switch (st->st_mode & S_IFMT) { | |
2201 | case S_IFREG: | |
2202 | fd = open(path, O_RDONLY); | |
2203 | if (fd < 0) | |
7616c6ca | 2204 | return error_errno("open(\"%s\")", path); |
58bf2a4c | 2205 | if (index_fd(istate, oid, fd, st, OBJ_BLOB, path, flags) < 0) |
259328b7 | 2206 | return error(_("%s: failed to insert into database"), |
ec1fcc16 JH |
2207 | path); |
2208 | break; | |
2209 | case S_IFLNK: | |
7616c6ca NTND |
2210 | if (strbuf_readlink(&sb, path, st->st_size)) |
2211 | return error_errno("readlink(\"%s\")", path); | |
c4ce46fc | 2212 | if (!(flags & HASH_WRITE_OBJECT)) |
2dcde20e MT |
2213 | hash_object_file(the_hash_algo, sb.buf, sb.len, |
2214 | blob_type, oid); | |
a09c985e | 2215 | else if (write_object_file(sb.buf, sb.len, blob_type, oid)) |
259328b7 | 2216 | rc = error(_("%s: failed to insert into database"), path); |
b760d3aa | 2217 | strbuf_release(&sb); |
ec1fcc16 | 2218 | break; |
f35a6d3b | 2219 | case S_IFDIR: |
a98e6101 | 2220 | return resolve_gitlink_ref(path, "HEAD", oid); |
ec1fcc16 | 2221 | default: |
259328b7 | 2222 | return error(_("%s: unsupported file type"), path); |
ec1fcc16 | 2223 | } |
ea8e0297 | 2224 | return rc; |
ec1fcc16 | 2225 | } |
a69e5429 JH |
2226 | |
2227 | int read_pack_header(int fd, struct pack_header *header) | |
2228 | { | |
f48ecd38 | 2229 | if (read_in_full(fd, header, sizeof(*header)) != sizeof(*header)) |
c697ad14 HO |
2230 | /* "eof before pack header was fully read" */ |
2231 | return PH_ERROR_EOF; | |
2232 | ||
a69e5429 JH |
2233 | if (header->hdr_signature != htonl(PACK_SIGNATURE)) |
2234 | /* "protocol error (pack signature mismatch detected)" */ | |
2235 | return PH_ERROR_PACK_SIGNATURE; | |
2236 | if (!pack_version_ok(header->hdr_version)) | |
2237 | /* "protocol error (pack version unsupported)" */ | |
2238 | return PH_ERROR_PROTOCOL; | |
2239 | return 0; | |
2240 | } | |
40d52ff7 | 2241 | |
e816caa0 | 2242 | void assert_oid_type(const struct object_id *oid, enum object_type expect) |
40d52ff7 | 2243 | { |
0df8e965 | 2244 | enum object_type type = oid_object_info(the_repository, oid, NULL); |
40d52ff7 | 2245 | if (type < 0) |
259328b7 | 2246 | die(_("%s is not a valid object"), oid_to_hex(oid)); |
40d52ff7 | 2247 | if (type != expect) |
259328b7 | 2248 | die(_("%s is not a valid '%s' object"), oid_to_hex(oid), |
debca9d2 | 2249 | type_name(expect)); |
40d52ff7 | 2250 | } |
27e1e22d | 2251 | |
70c49050 | 2252 | int for_each_file_in_obj_subdir(unsigned int subdir_nr, |
cc817ca3 RS |
2253 | struct strbuf *path, |
2254 | each_loose_object_fn obj_cb, | |
2255 | each_loose_cruft_fn cruft_cb, | |
2256 | each_loose_subdir_fn subdir_cb, | |
2257 | void *data) | |
27e1e22d | 2258 | { |
0375f472 RS |
2259 | size_t origlen, baselen; |
2260 | DIR *dir; | |
27e1e22d JK |
2261 | struct dirent *de; |
2262 | int r = 0; | |
62a24c89 | 2263 | struct object_id oid; |
27e1e22d | 2264 | |
70c49050 RS |
2265 | if (subdir_nr > 0xff) |
2266 | BUG("invalid loose object subdirectory: %x", subdir_nr); | |
2267 | ||
0375f472 RS |
2268 | origlen = path->len; |
2269 | strbuf_complete(path, '/'); | |
2270 | strbuf_addf(path, "%02x", subdir_nr); | |
0375f472 RS |
2271 | |
2272 | dir = opendir(path->buf); | |
27e1e22d | 2273 | if (!dir) { |
0375f472 | 2274 | if (errno != ENOENT) |
259328b7 | 2275 | r = error_errno(_("unable to open %s"), path->buf); |
0375f472 RS |
2276 | strbuf_setlen(path, origlen); |
2277 | return r; | |
27e1e22d JK |
2278 | } |
2279 | ||
62a24c89 | 2280 | oid.hash[0] = subdir_nr; |
163ee5e6 DS |
2281 | strbuf_addch(path, '/'); |
2282 | baselen = path->len; | |
62a24c89 | 2283 | |
27e1e22d | 2284 | while ((de = readdir(dir))) { |
163ee5e6 | 2285 | size_t namelen; |
27e1e22d JK |
2286 | if (is_dot_or_dotdot(de->d_name)) |
2287 | continue; | |
2288 | ||
163ee5e6 | 2289 | namelen = strlen(de->d_name); |
27e1e22d | 2290 | strbuf_setlen(path, baselen); |
163ee5e6 | 2291 | strbuf_add(path, de->d_name, namelen); |
94b5e093 | 2292 | if (namelen == the_hash_algo->hexsz - 2 && |
62a24c89 | 2293 | !hex_to_bytes(oid.hash + 1, de->d_name, |
94b5e093 | 2294 | the_hash_algo->rawsz - 1)) { |
62a24c89 RS |
2295 | if (obj_cb) { |
2296 | r = obj_cb(&oid, path->buf, data); | |
2297 | if (r) | |
2298 | break; | |
27e1e22d | 2299 | } |
62a24c89 | 2300 | continue; |
27e1e22d JK |
2301 | } |
2302 | ||
2303 | if (cruft_cb) { | |
2304 | r = cruft_cb(de->d_name, path->buf, data); | |
2305 | if (r) | |
2306 | break; | |
2307 | } | |
2308 | } | |
094c7e63 | 2309 | closedir(dir); |
27e1e22d | 2310 | |
163ee5e6 | 2311 | strbuf_setlen(path, baselen - 1); |
27e1e22d JK |
2312 | if (!r && subdir_cb) |
2313 | r = subdir_cb(subdir_nr, path->buf, data); | |
2314 | ||
0375f472 RS |
2315 | strbuf_setlen(path, origlen); |
2316 | ||
27e1e22d JK |
2317 | return r; |
2318 | } | |
2319 | ||
e6f875e0 | 2320 | int for_each_loose_file_in_objdir_buf(struct strbuf *path, |
27e1e22d JK |
2321 | each_loose_object_fn obj_cb, |
2322 | each_loose_cruft_fn cruft_cb, | |
2323 | each_loose_subdir_fn subdir_cb, | |
2324 | void *data) | |
2325 | { | |
27e1e22d JK |
2326 | int r = 0; |
2327 | int i; | |
2328 | ||
27e1e22d | 2329 | for (i = 0; i < 256; i++) { |
e6f875e0 | 2330 | r = for_each_file_in_obj_subdir(i, path, obj_cb, cruft_cb, |
27e1e22d | 2331 | subdir_cb, data); |
27e1e22d JK |
2332 | if (r) |
2333 | break; | |
2334 | } | |
2335 | ||
e6f875e0 JK |
2336 | return r; |
2337 | } | |
2338 | ||
2339 | int for_each_loose_file_in_objdir(const char *path, | |
2340 | each_loose_object_fn obj_cb, | |
2341 | each_loose_cruft_fn cruft_cb, | |
2342 | each_loose_subdir_fn subdir_cb, | |
2343 | void *data) | |
2344 | { | |
2345 | struct strbuf buf = STRBUF_INIT; | |
2346 | int r; | |
2347 | ||
2348 | strbuf_addstr(&buf, path); | |
2349 | r = for_each_loose_file_in_objdir_buf(&buf, obj_cb, cruft_cb, | |
2350 | subdir_cb, data); | |
27e1e22d | 2351 | strbuf_release(&buf); |
e6f875e0 | 2352 | |
27e1e22d JK |
2353 | return r; |
2354 | } | |
660c889e | 2355 | |
a7ff6f5a JK |
2356 | int for_each_loose_object(each_loose_object_fn cb, void *data, |
2357 | enum for_each_object_flags flags) | |
660c889e | 2358 | { |
f0eaf638 | 2359 | struct object_directory *odb; |
b0a42642 | 2360 | |
f0eaf638 JK |
2361 | prepare_alt_odb(the_repository); |
2362 | for (odb = the_repository->objects->odb; odb; odb = odb->next) { | |
2363 | int r = for_each_loose_file_in_objdir(odb->path, cb, NULL, | |
2364 | NULL, data); | |
2365 | if (r) | |
2366 | return r; | |
660c889e | 2367 | |
f0eaf638 JK |
2368 | if (flags & FOR_EACH_OBJECT_LOCAL_ONLY) |
2369 | break; | |
2370 | } | |
1385bb7b | 2371 | |
f0eaf638 | 2372 | return 0; |
660c889e JK |
2373 | } |
2374 | ||
3a2e0824 JK |
2375 | static int append_loose_object(const struct object_id *oid, const char *path, |
2376 | void *data) | |
660c889e | 2377 | { |
3a2e0824 JK |
2378 | oid_array_append(data, oid); |
2379 | return 0; | |
2380 | } | |
660c889e | 2381 | |
0000d654 RS |
2382 | struct oid_array *odb_loose_cache(struct object_directory *odb, |
2383 | const struct object_id *oid) | |
2384 | { | |
2385 | int subdir_nr = oid->hash[0]; | |
3a2e0824 | 2386 | struct strbuf buf = STRBUF_INIT; |
660c889e | 2387 | |
3a2e0824 JK |
2388 | if (subdir_nr < 0 || |
2389 | subdir_nr >= ARRAY_SIZE(odb->loose_objects_subdir_seen)) | |
2390 | BUG("subdir_nr out of range"); | |
1385bb7b | 2391 | |
3a2e0824 | 2392 | if (odb->loose_objects_subdir_seen[subdir_nr]) |
8be88dbc | 2393 | return &odb->loose_objects_cache[subdir_nr]; |
3a2e0824 JK |
2394 | |
2395 | strbuf_addstr(&buf, odb->path); | |
2396 | for_each_file_in_obj_subdir(subdir_nr, &buf, | |
2397 | append_loose_object, | |
2398 | NULL, NULL, | |
4cea1ce0 | 2399 | &odb->loose_objects_cache[subdir_nr]); |
3a2e0824 | 2400 | odb->loose_objects_subdir_seen[subdir_nr] = 1; |
7317aa71 | 2401 | strbuf_release(&buf); |
8be88dbc | 2402 | return &odb->loose_objects_cache[subdir_nr]; |
660c889e JK |
2403 | } |
2404 | ||
d4e19e51 RS |
2405 | void odb_clear_loose_cache(struct object_directory *odb) |
2406 | { | |
4cea1ce0 RS |
2407 | int i; |
2408 | ||
2409 | for (i = 0; i < ARRAY_SIZE(odb->loose_objects_cache); i++) | |
2410 | oid_array_clear(&odb->loose_objects_cache[i]); | |
d4e19e51 RS |
2411 | memset(&odb->loose_objects_subdir_seen, 0, |
2412 | sizeof(odb->loose_objects_subdir_seen)); | |
2413 | } | |
2414 | ||
00a7760e JK |
2415 | static int check_stream_oid(git_zstream *stream, |
2416 | const char *hdr, | |
2417 | unsigned long size, | |
2418 | const char *path, | |
2419 | const struct object_id *expected_oid) | |
f6371f92 | 2420 | { |
18e2588e | 2421 | git_hash_ctx c; |
00a7760e | 2422 | struct object_id real_oid; |
f6371f92 JK |
2423 | unsigned char buf[4096]; |
2424 | unsigned long total_read; | |
2425 | int status = Z_OK; | |
2426 | ||
18e2588e | 2427 | the_hash_algo->init_fn(&c); |
2428 | the_hash_algo->update_fn(&c, hdr, stream->total_out); | |
f6371f92 JK |
2429 | |
2430 | /* | |
2431 | * We already read some bytes into hdr, but the ones up to the NUL | |
2432 | * do not count against the object's content size. | |
2433 | */ | |
2434 | total_read = stream->total_out - strlen(hdr) - 1; | |
2435 | ||
2436 | /* | |
2437 | * This size comparison must be "<=" to read the final zlib packets; | |
00a7760e | 2438 | * see the comment in unpack_loose_rest for details. |
f6371f92 JK |
2439 | */ |
2440 | while (total_read <= size && | |
18ad13e5 JH |
2441 | (status == Z_OK || |
2442 | (status == Z_BUF_ERROR && !stream->avail_out))) { | |
f6371f92 JK |
2443 | stream->next_out = buf; |
2444 | stream->avail_out = sizeof(buf); | |
2445 | if (size - total_read < stream->avail_out) | |
2446 | stream->avail_out = size - total_read; | |
2447 | status = git_inflate(stream, Z_FINISH); | |
18e2588e | 2448 | the_hash_algo->update_fn(&c, buf, stream->next_out - buf); |
f6371f92 JK |
2449 | total_read += stream->next_out - buf; |
2450 | } | |
2451 | git_inflate_end(stream); | |
2452 | ||
2453 | if (status != Z_STREAM_END) { | |
00a7760e | 2454 | error(_("corrupt loose object '%s'"), oid_to_hex(expected_oid)); |
f6371f92 JK |
2455 | return -1; |
2456 | } | |
cce044df | 2457 | if (stream->avail_in) { |
259328b7 | 2458 | error(_("garbage at end of loose object '%s'"), |
00a7760e | 2459 | oid_to_hex(expected_oid)); |
cce044df JK |
2460 | return -1; |
2461 | } | |
f6371f92 | 2462 | |
00a7760e JK |
2463 | the_hash_algo->final_fn(real_oid.hash, &c); |
2464 | if (!oideq(expected_oid, &real_oid)) { | |
01f8d594 | 2465 | error(_("hash mismatch for %s (expected %s)"), path, |
00a7760e | 2466 | oid_to_hex(expected_oid)); |
f6371f92 JK |
2467 | return -1; |
2468 | } | |
2469 | ||
2470 | return 0; | |
2471 | } | |
2472 | ||
2473 | int read_loose_object(const char *path, | |
d61d87bd | 2474 | const struct object_id *expected_oid, |
f6371f92 JK |
2475 | enum object_type *type, |
2476 | unsigned long *size, | |
2477 | void **contents) | |
2478 | { | |
2479 | int ret = -1; | |
f6371f92 JK |
2480 | void *map = NULL; |
2481 | unsigned long mapsize; | |
2482 | git_zstream stream; | |
1af64f73 | 2483 | char hdr[MAX_HEADER_LEN]; |
f6371f92 JK |
2484 | |
2485 | *contents = NULL; | |
2486 | ||
514c5fdd | 2487 | map = map_loose_object_1(the_repository, path, NULL, &mapsize); |
f6371f92 | 2488 | if (!map) { |
259328b7 | 2489 | error_errno(_("unable to mmap %s"), path); |
f6371f92 JK |
2490 | goto out; |
2491 | } | |
2492 | ||
00a7760e | 2493 | if (unpack_loose_header(&stream, map, mapsize, hdr, sizeof(hdr)) < 0) { |
259328b7 | 2494 | error(_("unable to unpack header of %s"), path); |
f6371f92 JK |
2495 | goto out; |
2496 | } | |
2497 | ||
00a7760e | 2498 | *type = parse_loose_header(hdr, size); |
f6371f92 | 2499 | if (*type < 0) { |
259328b7 | 2500 | error(_("unable to parse header of %s"), path); |
f6371f92 JK |
2501 | git_inflate_end(&stream); |
2502 | goto out; | |
2503 | } | |
2504 | ||
7ac4f3a0 | 2505 | if (*type == OBJ_BLOB && *size > big_file_threshold) { |
00a7760e | 2506 | if (check_stream_oid(&stream, hdr, *size, path, expected_oid) < 0) |
f6371f92 JK |
2507 | goto out; |
2508 | } else { | |
00a7760e | 2509 | *contents = unpack_loose_rest(&stream, hdr, *size, expected_oid); |
f6371f92 | 2510 | if (!*contents) { |
259328b7 | 2511 | error(_("unable to unpack contents of %s"), path); |
f6371f92 JK |
2512 | git_inflate_end(&stream); |
2513 | goto out; | |
2514 | } | |
b98d1885 MT |
2515 | if (check_object_signature(the_repository, expected_oid, |
2516 | *contents, *size, | |
2517 | type_name(*type))) { | |
01f8d594 | 2518 | error(_("hash mismatch for %s (expected %s)"), path, |
d61d87bd | 2519 | oid_to_hex(expected_oid)); |
f6371f92 JK |
2520 | free(*contents); |
2521 | goto out; | |
2522 | } | |
2523 | } | |
2524 | ||
2525 | ret = 0; /* everything checks out */ | |
2526 | ||
2527 | out: | |
2528 | if (map) | |
2529 | munmap(map, mapsize); | |
f6371f92 JK |
2530 | return ret; |
2531 | } |