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1 | #include "cache.h" | |
2 | #include "object-store.h" | |
3 | #include "repository.h" | |
4 | #include "object.h" | |
5 | #include "blob.h" | |
6 | #include "tree.h" | |
7 | #include "tree-walk.h" | |
8 | #include "commit.h" | |
9 | #include "tag.h" | |
10 | #include "fsck.h" | |
11 | #include "refs.h" | |
12 | #include "utf8.h" | |
13 | #include "decorate.h" | |
14 | #include "oidset.h" | |
15 | #include "packfile.h" | |
16 | #include "submodule-config.h" | |
17 | #include "config.h" | |
18 | #include "help.h" | |
19 | ||
20 | static struct oidset gitmodules_found = OIDSET_INIT; | |
21 | static struct oidset gitmodules_done = OIDSET_INIT; | |
22 | ||
23 | #define FSCK_FATAL -1 | |
24 | #define FSCK_INFO -2 | |
25 | ||
26 | #define FOREACH_MSG_ID(FUNC) \ | |
27 | /* fatal errors */ \ | |
28 | FUNC(NUL_IN_HEADER, FATAL) \ | |
29 | FUNC(UNTERMINATED_HEADER, FATAL) \ | |
30 | /* errors */ \ | |
31 | FUNC(BAD_DATE, ERROR) \ | |
32 | FUNC(BAD_DATE_OVERFLOW, ERROR) \ | |
33 | FUNC(BAD_EMAIL, ERROR) \ | |
34 | FUNC(BAD_NAME, ERROR) \ | |
35 | FUNC(BAD_OBJECT_SHA1, ERROR) \ | |
36 | FUNC(BAD_PARENT_SHA1, ERROR) \ | |
37 | FUNC(BAD_TAG_OBJECT, ERROR) \ | |
38 | FUNC(BAD_TIMEZONE, ERROR) \ | |
39 | FUNC(BAD_TREE, ERROR) \ | |
40 | FUNC(BAD_TREE_SHA1, ERROR) \ | |
41 | FUNC(BAD_TYPE, ERROR) \ | |
42 | FUNC(DUPLICATE_ENTRIES, ERROR) \ | |
43 | FUNC(MISSING_AUTHOR, ERROR) \ | |
44 | FUNC(MISSING_COMMITTER, ERROR) \ | |
45 | FUNC(MISSING_EMAIL, ERROR) \ | |
46 | FUNC(MISSING_NAME_BEFORE_EMAIL, ERROR) \ | |
47 | FUNC(MISSING_OBJECT, ERROR) \ | |
48 | FUNC(MISSING_SPACE_BEFORE_DATE, ERROR) \ | |
49 | FUNC(MISSING_SPACE_BEFORE_EMAIL, ERROR) \ | |
50 | FUNC(MISSING_TAG, ERROR) \ | |
51 | FUNC(MISSING_TAG_ENTRY, ERROR) \ | |
52 | FUNC(MISSING_TREE, ERROR) \ | |
53 | FUNC(MISSING_TREE_OBJECT, ERROR) \ | |
54 | FUNC(MISSING_TYPE, ERROR) \ | |
55 | FUNC(MISSING_TYPE_ENTRY, ERROR) \ | |
56 | FUNC(MULTIPLE_AUTHORS, ERROR) \ | |
57 | FUNC(TREE_NOT_SORTED, ERROR) \ | |
58 | FUNC(UNKNOWN_TYPE, ERROR) \ | |
59 | FUNC(ZERO_PADDED_DATE, ERROR) \ | |
60 | FUNC(GITMODULES_MISSING, ERROR) \ | |
61 | FUNC(GITMODULES_BLOB, ERROR) \ | |
62 | FUNC(GITMODULES_LARGE, ERROR) \ | |
63 | FUNC(GITMODULES_NAME, ERROR) \ | |
64 | FUNC(GITMODULES_SYMLINK, ERROR) \ | |
65 | FUNC(GITMODULES_URL, ERROR) \ | |
66 | FUNC(GITMODULES_PATH, ERROR) \ | |
67 | FUNC(GITMODULES_UPDATE, ERROR) \ | |
68 | /* warnings */ \ | |
69 | FUNC(BAD_FILEMODE, WARN) \ | |
70 | FUNC(EMPTY_NAME, WARN) \ | |
71 | FUNC(FULL_PATHNAME, WARN) \ | |
72 | FUNC(HAS_DOT, WARN) \ | |
73 | FUNC(HAS_DOTDOT, WARN) \ | |
74 | FUNC(HAS_DOTGIT, WARN) \ | |
75 | FUNC(NULL_SHA1, WARN) \ | |
76 | FUNC(ZERO_PADDED_FILEMODE, WARN) \ | |
77 | FUNC(NUL_IN_COMMIT, WARN) \ | |
78 | /* infos (reported as warnings, but ignored by default) */ \ | |
79 | FUNC(GITMODULES_PARSE, INFO) \ | |
80 | FUNC(BAD_TAG_NAME, INFO) \ | |
81 | FUNC(MISSING_TAGGER_ENTRY, INFO) | |
82 | ||
83 | #define MSG_ID(id, msg_type) FSCK_MSG_##id, | |
84 | enum fsck_msg_id { | |
85 | FOREACH_MSG_ID(MSG_ID) | |
86 | FSCK_MSG_MAX | |
87 | }; | |
88 | #undef MSG_ID | |
89 | ||
90 | #define STR(x) #x | |
91 | #define MSG_ID(id, msg_type) { STR(id), NULL, NULL, FSCK_##msg_type }, | |
92 | static struct { | |
93 | const char *id_string; | |
94 | const char *downcased; | |
95 | const char *camelcased; | |
96 | int msg_type; | |
97 | } msg_id_info[FSCK_MSG_MAX + 1] = { | |
98 | FOREACH_MSG_ID(MSG_ID) | |
99 | { NULL, NULL, NULL, -1 } | |
100 | }; | |
101 | #undef MSG_ID | |
102 | ||
103 | static void prepare_msg_ids(void) | |
104 | { | |
105 | int i; | |
106 | ||
107 | if (msg_id_info[0].downcased) | |
108 | return; | |
109 | ||
110 | /* convert id_string to lower case, without underscores. */ | |
111 | for (i = 0; i < FSCK_MSG_MAX; i++) { | |
112 | const char *p = msg_id_info[i].id_string; | |
113 | int len = strlen(p); | |
114 | char *q = xmalloc(len); | |
115 | ||
116 | msg_id_info[i].downcased = q; | |
117 | while (*p) | |
118 | if (*p == '_') | |
119 | p++; | |
120 | else | |
121 | *(q)++ = tolower(*(p)++); | |
122 | *q = '\0'; | |
123 | ||
124 | p = msg_id_info[i].id_string; | |
125 | q = xmalloc(len); | |
126 | msg_id_info[i].camelcased = q; | |
127 | while (*p) { | |
128 | if (*p == '_') { | |
129 | p++; | |
130 | if (*p) | |
131 | *q++ = *p++; | |
132 | } else { | |
133 | *q++ = tolower(*p++); | |
134 | } | |
135 | } | |
136 | *q = '\0'; | |
137 | } | |
138 | } | |
139 | ||
140 | static int parse_msg_id(const char *text) | |
141 | { | |
142 | int i; | |
143 | ||
144 | prepare_msg_ids(); | |
145 | ||
146 | for (i = 0; i < FSCK_MSG_MAX; i++) | |
147 | if (!strcmp(text, msg_id_info[i].downcased)) | |
148 | return i; | |
149 | ||
150 | return -1; | |
151 | } | |
152 | ||
153 | void list_config_fsck_msg_ids(struct string_list *list, const char *prefix) | |
154 | { | |
155 | int i; | |
156 | ||
157 | prepare_msg_ids(); | |
158 | ||
159 | for (i = 0; i < FSCK_MSG_MAX; i++) | |
160 | list_config_item(list, prefix, msg_id_info[i].camelcased); | |
161 | } | |
162 | ||
163 | static int fsck_msg_type(enum fsck_msg_id msg_id, | |
164 | struct fsck_options *options) | |
165 | { | |
166 | int msg_type; | |
167 | ||
168 | assert(msg_id >= 0 && msg_id < FSCK_MSG_MAX); | |
169 | ||
170 | if (options->msg_type) | |
171 | msg_type = options->msg_type[msg_id]; | |
172 | else { | |
173 | msg_type = msg_id_info[msg_id].msg_type; | |
174 | if (options->strict && msg_type == FSCK_WARN) | |
175 | msg_type = FSCK_ERROR; | |
176 | } | |
177 | ||
178 | return msg_type; | |
179 | } | |
180 | ||
181 | static int parse_msg_type(const char *str) | |
182 | { | |
183 | if (!strcmp(str, "error")) | |
184 | return FSCK_ERROR; | |
185 | else if (!strcmp(str, "warn")) | |
186 | return FSCK_WARN; | |
187 | else if (!strcmp(str, "ignore")) | |
188 | return FSCK_IGNORE; | |
189 | else | |
190 | die("Unknown fsck message type: '%s'", str); | |
191 | } | |
192 | ||
193 | int is_valid_msg_type(const char *msg_id, const char *msg_type) | |
194 | { | |
195 | if (parse_msg_id(msg_id) < 0) | |
196 | return 0; | |
197 | parse_msg_type(msg_type); | |
198 | return 1; | |
199 | } | |
200 | ||
201 | void fsck_set_msg_type(struct fsck_options *options, | |
202 | const char *msg_id, const char *msg_type) | |
203 | { | |
204 | int id = parse_msg_id(msg_id), type; | |
205 | ||
206 | if (id < 0) | |
207 | die("Unhandled message id: %s", msg_id); | |
208 | type = parse_msg_type(msg_type); | |
209 | ||
210 | if (type != FSCK_ERROR && msg_id_info[id].msg_type == FSCK_FATAL) | |
211 | die("Cannot demote %s to %s", msg_id, msg_type); | |
212 | ||
213 | if (!options->msg_type) { | |
214 | int i; | |
215 | int *msg_type; | |
216 | ALLOC_ARRAY(msg_type, FSCK_MSG_MAX); | |
217 | for (i = 0; i < FSCK_MSG_MAX; i++) | |
218 | msg_type[i] = fsck_msg_type(i, options); | |
219 | options->msg_type = msg_type; | |
220 | } | |
221 | ||
222 | options->msg_type[id] = type; | |
223 | } | |
224 | ||
225 | void fsck_set_msg_types(struct fsck_options *options, const char *values) | |
226 | { | |
227 | char *buf = xstrdup(values), *to_free = buf; | |
228 | int done = 0; | |
229 | ||
230 | while (!done) { | |
231 | int len = strcspn(buf, " ,|"), equal; | |
232 | ||
233 | done = !buf[len]; | |
234 | if (!len) { | |
235 | buf++; | |
236 | continue; | |
237 | } | |
238 | buf[len] = '\0'; | |
239 | ||
240 | for (equal = 0; | |
241 | equal < len && buf[equal] != '=' && buf[equal] != ':'; | |
242 | equal++) | |
243 | buf[equal] = tolower(buf[equal]); | |
244 | buf[equal] = '\0'; | |
245 | ||
246 | if (!strcmp(buf, "skiplist")) { | |
247 | if (equal == len) | |
248 | die("skiplist requires a path"); | |
249 | oidset_parse_file(&options->skiplist, buf + equal + 1); | |
250 | buf += len + 1; | |
251 | continue; | |
252 | } | |
253 | ||
254 | if (equal == len) | |
255 | die("Missing '=': '%s'", buf); | |
256 | ||
257 | fsck_set_msg_type(options, buf, buf + equal + 1); | |
258 | buf += len + 1; | |
259 | } | |
260 | free(to_free); | |
261 | } | |
262 | ||
263 | static void append_msg_id(struct strbuf *sb, const char *msg_id) | |
264 | { | |
265 | for (;;) { | |
266 | char c = *(msg_id)++; | |
267 | ||
268 | if (!c) | |
269 | break; | |
270 | if (c != '_') | |
271 | strbuf_addch(sb, tolower(c)); | |
272 | else { | |
273 | assert(*msg_id); | |
274 | strbuf_addch(sb, *(msg_id)++); | |
275 | } | |
276 | } | |
277 | ||
278 | strbuf_addstr(sb, ": "); | |
279 | } | |
280 | ||
281 | static int object_on_skiplist(struct fsck_options *opts, | |
282 | const struct object_id *oid) | |
283 | { | |
284 | return opts && oid && oidset_contains(&opts->skiplist, oid); | |
285 | } | |
286 | ||
287 | __attribute__((format (printf, 5, 6))) | |
288 | static int report(struct fsck_options *options, | |
289 | const struct object_id *oid, enum object_type object_type, | |
290 | enum fsck_msg_id id, const char *fmt, ...) | |
291 | { | |
292 | va_list ap; | |
293 | struct strbuf sb = STRBUF_INIT; | |
294 | int msg_type = fsck_msg_type(id, options), result; | |
295 | ||
296 | if (msg_type == FSCK_IGNORE) | |
297 | return 0; | |
298 | ||
299 | if (object_on_skiplist(options, oid)) | |
300 | return 0; | |
301 | ||
302 | if (msg_type == FSCK_FATAL) | |
303 | msg_type = FSCK_ERROR; | |
304 | else if (msg_type == FSCK_INFO) | |
305 | msg_type = FSCK_WARN; | |
306 | ||
307 | append_msg_id(&sb, msg_id_info[id].id_string); | |
308 | ||
309 | va_start(ap, fmt); | |
310 | strbuf_vaddf(&sb, fmt, ap); | |
311 | result = options->error_func(options, oid, object_type, | |
312 | msg_type, sb.buf); | |
313 | strbuf_release(&sb); | |
314 | va_end(ap); | |
315 | ||
316 | return result; | |
317 | } | |
318 | ||
319 | void fsck_enable_object_names(struct fsck_options *options) | |
320 | { | |
321 | if (!options->object_names) | |
322 | options->object_names = kh_init_oid_map(); | |
323 | } | |
324 | ||
325 | const char *fsck_get_object_name(struct fsck_options *options, | |
326 | const struct object_id *oid) | |
327 | { | |
328 | khiter_t pos; | |
329 | if (!options->object_names) | |
330 | return NULL; | |
331 | pos = kh_get_oid_map(options->object_names, *oid); | |
332 | if (pos >= kh_end(options->object_names)) | |
333 | return NULL; | |
334 | return kh_value(options->object_names, pos); | |
335 | } | |
336 | ||
337 | void fsck_put_object_name(struct fsck_options *options, | |
338 | const struct object_id *oid, | |
339 | const char *fmt, ...) | |
340 | { | |
341 | va_list ap; | |
342 | struct strbuf buf = STRBUF_INIT; | |
343 | khiter_t pos; | |
344 | int hashret; | |
345 | ||
346 | if (!options->object_names) | |
347 | return; | |
348 | ||
349 | pos = kh_put_oid_map(options->object_names, *oid, &hashret); | |
350 | if (!hashret) | |
351 | return; | |
352 | va_start(ap, fmt); | |
353 | strbuf_vaddf(&buf, fmt, ap); | |
354 | kh_value(options->object_names, pos) = strbuf_detach(&buf, NULL); | |
355 | va_end(ap); | |
356 | } | |
357 | ||
358 | const char *fsck_describe_object(struct fsck_options *options, | |
359 | const struct object_id *oid) | |
360 | { | |
361 | static struct strbuf bufs[] = { | |
362 | STRBUF_INIT, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT | |
363 | }; | |
364 | static int b = 0; | |
365 | struct strbuf *buf; | |
366 | const char *name = fsck_get_object_name(options, oid); | |
367 | ||
368 | buf = bufs + b; | |
369 | b = (b + 1) % ARRAY_SIZE(bufs); | |
370 | strbuf_reset(buf); | |
371 | strbuf_addstr(buf, oid_to_hex(oid)); | |
372 | if (name) | |
373 | strbuf_addf(buf, " (%s)", name); | |
374 | ||
375 | return buf->buf; | |
376 | } | |
377 | ||
378 | static int fsck_walk_tree(struct tree *tree, void *data, struct fsck_options *options) | |
379 | { | |
380 | struct tree_desc desc; | |
381 | struct name_entry entry; | |
382 | int res = 0; | |
383 | const char *name; | |
384 | ||
385 | if (parse_tree(tree)) | |
386 | return -1; | |
387 | ||
388 | name = fsck_get_object_name(options, &tree->object.oid); | |
389 | if (init_tree_desc_gently(&desc, tree->buffer, tree->size)) | |
390 | return -1; | |
391 | while (tree_entry_gently(&desc, &entry)) { | |
392 | struct object *obj; | |
393 | int result; | |
394 | ||
395 | if (S_ISGITLINK(entry.mode)) | |
396 | continue; | |
397 | ||
398 | if (S_ISDIR(entry.mode)) { | |
399 | obj = (struct object *)lookup_tree(the_repository, &entry.oid); | |
400 | if (name && obj) | |
401 | fsck_put_object_name(options, &entry.oid, "%s%s/", | |
402 | name, entry.path); | |
403 | result = options->walk(obj, OBJ_TREE, data, options); | |
404 | } | |
405 | else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode)) { | |
406 | obj = (struct object *)lookup_blob(the_repository, &entry.oid); | |
407 | if (name && obj) | |
408 | fsck_put_object_name(options, &entry.oid, "%s%s", | |
409 | name, entry.path); | |
410 | result = options->walk(obj, OBJ_BLOB, data, options); | |
411 | } | |
412 | else { | |
413 | result = error("in tree %s: entry %s has bad mode %.6o", | |
414 | fsck_describe_object(options, &tree->object.oid), | |
415 | entry.path, entry.mode); | |
416 | } | |
417 | if (result < 0) | |
418 | return result; | |
419 | if (!res) | |
420 | res = result; | |
421 | } | |
422 | return res; | |
423 | } | |
424 | ||
425 | static int fsck_walk_commit(struct commit *commit, void *data, struct fsck_options *options) | |
426 | { | |
427 | int counter = 0, generation = 0, name_prefix_len = 0; | |
428 | struct commit_list *parents; | |
429 | int res; | |
430 | int result; | |
431 | const char *name; | |
432 | ||
433 | if (parse_commit(commit)) | |
434 | return -1; | |
435 | ||
436 | name = fsck_get_object_name(options, &commit->object.oid); | |
437 | if (name) | |
438 | fsck_put_object_name(options, get_commit_tree_oid(commit), | |
439 | "%s:", name); | |
440 | ||
441 | result = options->walk((struct object *)get_commit_tree(commit), | |
442 | OBJ_TREE, data, options); | |
443 | if (result < 0) | |
444 | return result; | |
445 | res = result; | |
446 | ||
447 | parents = commit->parents; | |
448 | if (name && parents) { | |
449 | int len = strlen(name), power; | |
450 | ||
451 | if (len && name[len - 1] == '^') { | |
452 | generation = 1; | |
453 | name_prefix_len = len - 1; | |
454 | } | |
455 | else { /* parse ~<generation> suffix */ | |
456 | for (generation = 0, power = 1; | |
457 | len && isdigit(name[len - 1]); | |
458 | power *= 10) | |
459 | generation += power * (name[--len] - '0'); | |
460 | if (power > 1 && len && name[len - 1] == '~') | |
461 | name_prefix_len = len - 1; | |
462 | } | |
463 | } | |
464 | ||
465 | while (parents) { | |
466 | if (name) { | |
467 | struct object_id *oid = &parents->item->object.oid; | |
468 | ||
469 | if (counter++) | |
470 | fsck_put_object_name(options, oid, "%s^%d", | |
471 | name, counter); | |
472 | else if (generation > 0) | |
473 | fsck_put_object_name(options, oid, "%.*s~%d", | |
474 | name_prefix_len, name, | |
475 | generation + 1); | |
476 | else | |
477 | fsck_put_object_name(options, oid, "%s^", name); | |
478 | } | |
479 | result = options->walk((struct object *)parents->item, OBJ_COMMIT, data, options); | |
480 | if (result < 0) | |
481 | return result; | |
482 | if (!res) | |
483 | res = result; | |
484 | parents = parents->next; | |
485 | } | |
486 | return res; | |
487 | } | |
488 | ||
489 | static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *options) | |
490 | { | |
491 | const char *name = fsck_get_object_name(options, &tag->object.oid); | |
492 | ||
493 | if (parse_tag(tag)) | |
494 | return -1; | |
495 | if (name) | |
496 | fsck_put_object_name(options, &tag->tagged->oid, "%s", name); | |
497 | return options->walk(tag->tagged, OBJ_ANY, data, options); | |
498 | } | |
499 | ||
500 | int fsck_walk(struct object *obj, void *data, struct fsck_options *options) | |
501 | { | |
502 | if (!obj) | |
503 | return -1; | |
504 | ||
505 | if (obj->type == OBJ_NONE) | |
506 | parse_object(the_repository, &obj->oid); | |
507 | ||
508 | switch (obj->type) { | |
509 | case OBJ_BLOB: | |
510 | return 0; | |
511 | case OBJ_TREE: | |
512 | return fsck_walk_tree((struct tree *)obj, data, options); | |
513 | case OBJ_COMMIT: | |
514 | return fsck_walk_commit((struct commit *)obj, data, options); | |
515 | case OBJ_TAG: | |
516 | return fsck_walk_tag((struct tag *)obj, data, options); | |
517 | default: | |
518 | error("Unknown object type for %s", | |
519 | fsck_describe_object(options, &obj->oid)); | |
520 | return -1; | |
521 | } | |
522 | } | |
523 | ||
524 | /* | |
525 | * The entries in a tree are ordered in the _path_ order, | |
526 | * which means that a directory entry is ordered by adding | |
527 | * a slash to the end of it. | |
528 | * | |
529 | * So a directory called "a" is ordered _after_ a file | |
530 | * called "a.c", because "a/" sorts after "a.c". | |
531 | */ | |
532 | #define TREE_UNORDERED (-1) | |
533 | #define TREE_HAS_DUPS (-2) | |
534 | ||
535 | static int verify_ordered(unsigned mode1, const char *name1, unsigned mode2, const char *name2) | |
536 | { | |
537 | int len1 = strlen(name1); | |
538 | int len2 = strlen(name2); | |
539 | int len = len1 < len2 ? len1 : len2; | |
540 | unsigned char c1, c2; | |
541 | int cmp; | |
542 | ||
543 | cmp = memcmp(name1, name2, len); | |
544 | if (cmp < 0) | |
545 | return 0; | |
546 | if (cmp > 0) | |
547 | return TREE_UNORDERED; | |
548 | ||
549 | /* | |
550 | * Ok, the first <len> characters are the same. | |
551 | * Now we need to order the next one, but turn | |
552 | * a '\0' into a '/' for a directory entry. | |
553 | */ | |
554 | c1 = name1[len]; | |
555 | c2 = name2[len]; | |
556 | if (!c1 && !c2) | |
557 | /* | |
558 | * git-write-tree used to write out a nonsense tree that has | |
559 | * entries with the same name, one blob and one tree. Make | |
560 | * sure we do not have duplicate entries. | |
561 | */ | |
562 | return TREE_HAS_DUPS; | |
563 | if (!c1 && S_ISDIR(mode1)) | |
564 | c1 = '/'; | |
565 | if (!c2 && S_ISDIR(mode2)) | |
566 | c2 = '/'; | |
567 | return c1 < c2 ? 0 : TREE_UNORDERED; | |
568 | } | |
569 | ||
570 | static int fsck_tree(const struct object_id *oid, | |
571 | const char *buffer, unsigned long size, | |
572 | struct fsck_options *options) | |
573 | { | |
574 | int retval = 0; | |
575 | int has_null_sha1 = 0; | |
576 | int has_full_path = 0; | |
577 | int has_empty_name = 0; | |
578 | int has_dot = 0; | |
579 | int has_dotdot = 0; | |
580 | int has_dotgit = 0; | |
581 | int has_zero_pad = 0; | |
582 | int has_bad_modes = 0; | |
583 | int has_dup_entries = 0; | |
584 | int not_properly_sorted = 0; | |
585 | struct tree_desc desc; | |
586 | unsigned o_mode; | |
587 | const char *o_name; | |
588 | ||
589 | if (init_tree_desc_gently(&desc, buffer, size)) { | |
590 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree"); | |
591 | return retval; | |
592 | } | |
593 | ||
594 | o_mode = 0; | |
595 | o_name = NULL; | |
596 | ||
597 | while (desc.size) { | |
598 | unsigned short mode; | |
599 | const char *name, *backslash; | |
600 | const struct object_id *oid; | |
601 | ||
602 | oid = tree_entry_extract(&desc, &name, &mode); | |
603 | ||
604 | has_null_sha1 |= is_null_oid(oid); | |
605 | has_full_path |= !!strchr(name, '/'); | |
606 | has_empty_name |= !*name; | |
607 | has_dot |= !strcmp(name, "."); | |
608 | has_dotdot |= !strcmp(name, ".."); | |
609 | has_dotgit |= is_hfs_dotgit(name) || is_ntfs_dotgit(name); | |
610 | has_zero_pad |= *(char *)desc.buffer == '0'; | |
611 | ||
612 | if (is_hfs_dotgitmodules(name) || is_ntfs_dotgitmodules(name)) { | |
613 | if (!S_ISLNK(mode)) | |
614 | oidset_insert(&gitmodules_found, oid); | |
615 | else | |
616 | retval += report(options, | |
617 | oid, OBJ_TREE, | |
618 | FSCK_MSG_GITMODULES_SYMLINK, | |
619 | ".gitmodules is a symbolic link"); | |
620 | } | |
621 | ||
622 | if ((backslash = strchr(name, '\\'))) { | |
623 | while (backslash) { | |
624 | backslash++; | |
625 | has_dotgit |= is_ntfs_dotgit(backslash); | |
626 | if (is_ntfs_dotgitmodules(backslash)) { | |
627 | if (!S_ISLNK(mode)) | |
628 | oidset_insert(&gitmodules_found, oid); | |
629 | else | |
630 | retval += report(options, oid, OBJ_TREE, | |
631 | FSCK_MSG_GITMODULES_SYMLINK, | |
632 | ".gitmodules is a symbolic link"); | |
633 | } | |
634 | backslash = strchr(backslash, '\\'); | |
635 | } | |
636 | } | |
637 | ||
638 | if (update_tree_entry_gently(&desc)) { | |
639 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree"); | |
640 | break; | |
641 | } | |
642 | ||
643 | switch (mode) { | |
644 | /* | |
645 | * Standard modes.. | |
646 | */ | |
647 | case S_IFREG | 0755: | |
648 | case S_IFREG | 0644: | |
649 | case S_IFLNK: | |
650 | case S_IFDIR: | |
651 | case S_IFGITLINK: | |
652 | break; | |
653 | /* | |
654 | * This is nonstandard, but we had a few of these | |
655 | * early on when we honored the full set of mode | |
656 | * bits.. | |
657 | */ | |
658 | case S_IFREG | 0664: | |
659 | if (!options->strict) | |
660 | break; | |
661 | /* fallthrough */ | |
662 | default: | |
663 | has_bad_modes = 1; | |
664 | } | |
665 | ||
666 | if (o_name) { | |
667 | switch (verify_ordered(o_mode, o_name, mode, name)) { | |
668 | case TREE_UNORDERED: | |
669 | not_properly_sorted = 1; | |
670 | break; | |
671 | case TREE_HAS_DUPS: | |
672 | has_dup_entries = 1; | |
673 | break; | |
674 | default: | |
675 | break; | |
676 | } | |
677 | } | |
678 | ||
679 | o_mode = mode; | |
680 | o_name = name; | |
681 | } | |
682 | ||
683 | if (has_null_sha1) | |
684 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_NULL_SHA1, "contains entries pointing to null sha1"); | |
685 | if (has_full_path) | |
686 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_FULL_PATHNAME, "contains full pathnames"); | |
687 | if (has_empty_name) | |
688 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_EMPTY_NAME, "contains empty pathname"); | |
689 | if (has_dot) | |
690 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_HAS_DOT, "contains '.'"); | |
691 | if (has_dotdot) | |
692 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_HAS_DOTDOT, "contains '..'"); | |
693 | if (has_dotgit) | |
694 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_HAS_DOTGIT, "contains '.git'"); | |
695 | if (has_zero_pad) | |
696 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_ZERO_PADDED_FILEMODE, "contains zero-padded file modes"); | |
697 | if (has_bad_modes) | |
698 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_BAD_FILEMODE, "contains bad file modes"); | |
699 | if (has_dup_entries) | |
700 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_DUPLICATE_ENTRIES, "contains duplicate file entries"); | |
701 | if (not_properly_sorted) | |
702 | retval += report(options, oid, OBJ_TREE, FSCK_MSG_TREE_NOT_SORTED, "not properly sorted"); | |
703 | return retval; | |
704 | } | |
705 | ||
706 | static int verify_headers(const void *data, unsigned long size, | |
707 | const struct object_id *oid, enum object_type type, | |
708 | struct fsck_options *options) | |
709 | { | |
710 | const char *buffer = (const char *)data; | |
711 | unsigned long i; | |
712 | ||
713 | for (i = 0; i < size; i++) { | |
714 | switch (buffer[i]) { | |
715 | case '\0': | |
716 | return report(options, oid, type, | |
717 | FSCK_MSG_NUL_IN_HEADER, | |
718 | "unterminated header: NUL at offset %ld", i); | |
719 | case '\n': | |
720 | if (i + 1 < size && buffer[i + 1] == '\n') | |
721 | return 0; | |
722 | } | |
723 | } | |
724 | ||
725 | /* | |
726 | * We did not find double-LF that separates the header | |
727 | * and the body. Not having a body is not a crime but | |
728 | * we do want to see the terminating LF for the last header | |
729 | * line. | |
730 | */ | |
731 | if (size && buffer[size - 1] == '\n') | |
732 | return 0; | |
733 | ||
734 | return report(options, oid, type, | |
735 | FSCK_MSG_UNTERMINATED_HEADER, "unterminated header"); | |
736 | } | |
737 | ||
738 | static int fsck_ident(const char **ident, | |
739 | const struct object_id *oid, enum object_type type, | |
740 | struct fsck_options *options) | |
741 | { | |
742 | const char *p = *ident; | |
743 | char *end; | |
744 | ||
745 | *ident = strchrnul(*ident, '\n'); | |
746 | if (**ident == '\n') | |
747 | (*ident)++; | |
748 | ||
749 | if (*p == '<') | |
750 | return report(options, oid, type, FSCK_MSG_MISSING_NAME_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); | |
751 | p += strcspn(p, "<>\n"); | |
752 | if (*p == '>') | |
753 | return report(options, oid, type, FSCK_MSG_BAD_NAME, "invalid author/committer line - bad name"); | |
754 | if (*p != '<') | |
755 | return report(options, oid, type, FSCK_MSG_MISSING_EMAIL, "invalid author/committer line - missing email"); | |
756 | if (p[-1] != ' ') | |
757 | return report(options, oid, type, FSCK_MSG_MISSING_SPACE_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); | |
758 | p++; | |
759 | p += strcspn(p, "<>\n"); | |
760 | if (*p != '>') | |
761 | return report(options, oid, type, FSCK_MSG_BAD_EMAIL, "invalid author/committer line - bad email"); | |
762 | p++; | |
763 | if (*p != ' ') | |
764 | return report(options, oid, type, FSCK_MSG_MISSING_SPACE_BEFORE_DATE, "invalid author/committer line - missing space before date"); | |
765 | p++; | |
766 | if (*p == '0' && p[1] != ' ') | |
767 | return report(options, oid, type, FSCK_MSG_ZERO_PADDED_DATE, "invalid author/committer line - zero-padded date"); | |
768 | if (date_overflows(parse_timestamp(p, &end, 10))) | |
769 | return report(options, oid, type, FSCK_MSG_BAD_DATE_OVERFLOW, "invalid author/committer line - date causes integer overflow"); | |
770 | if ((end == p || *end != ' ')) | |
771 | return report(options, oid, type, FSCK_MSG_BAD_DATE, "invalid author/committer line - bad date"); | |
772 | p = end + 1; | |
773 | if ((*p != '+' && *p != '-') || | |
774 | !isdigit(p[1]) || | |
775 | !isdigit(p[2]) || | |
776 | !isdigit(p[3]) || | |
777 | !isdigit(p[4]) || | |
778 | (p[5] != '\n')) | |
779 | return report(options, oid, type, FSCK_MSG_BAD_TIMEZONE, "invalid author/committer line - bad time zone"); | |
780 | p += 6; | |
781 | return 0; | |
782 | } | |
783 | ||
784 | static int fsck_commit(const struct object_id *oid, | |
785 | const char *buffer, unsigned long size, | |
786 | struct fsck_options *options) | |
787 | { | |
788 | struct object_id tree_oid, parent_oid; | |
789 | unsigned author_count; | |
790 | int err; | |
791 | const char *buffer_begin = buffer; | |
792 | const char *p; | |
793 | ||
794 | if (verify_headers(buffer, size, oid, OBJ_COMMIT, options)) | |
795 | return -1; | |
796 | ||
797 | if (!skip_prefix(buffer, "tree ", &buffer)) | |
798 | return report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_TREE, "invalid format - expected 'tree' line"); | |
799 | if (parse_oid_hex(buffer, &tree_oid, &p) || *p != '\n') { | |
800 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_BAD_TREE_SHA1, "invalid 'tree' line format - bad sha1"); | |
801 | if (err) | |
802 | return err; | |
803 | } | |
804 | buffer = p + 1; | |
805 | while (skip_prefix(buffer, "parent ", &buffer)) { | |
806 | if (parse_oid_hex(buffer, &parent_oid, &p) || *p != '\n') { | |
807 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_BAD_PARENT_SHA1, "invalid 'parent' line format - bad sha1"); | |
808 | if (err) | |
809 | return err; | |
810 | } | |
811 | buffer = p + 1; | |
812 | } | |
813 | author_count = 0; | |
814 | while (skip_prefix(buffer, "author ", &buffer)) { | |
815 | author_count++; | |
816 | err = fsck_ident(&buffer, oid, OBJ_COMMIT, options); | |
817 | if (err) | |
818 | return err; | |
819 | } | |
820 | if (author_count < 1) | |
821 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_AUTHOR, "invalid format - expected 'author' line"); | |
822 | else if (author_count > 1) | |
823 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_MULTIPLE_AUTHORS, "invalid format - multiple 'author' lines"); | |
824 | if (err) | |
825 | return err; | |
826 | if (!skip_prefix(buffer, "committer ", &buffer)) | |
827 | return report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_COMMITTER, "invalid format - expected 'committer' line"); | |
828 | err = fsck_ident(&buffer, oid, OBJ_COMMIT, options); | |
829 | if (err) | |
830 | return err; | |
831 | if (memchr(buffer_begin, '\0', size)) { | |
832 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_NUL_IN_COMMIT, | |
833 | "NUL byte in the commit object body"); | |
834 | if (err) | |
835 | return err; | |
836 | } | |
837 | return 0; | |
838 | } | |
839 | ||
840 | static int fsck_tag(const struct object_id *oid, const char *buffer, | |
841 | unsigned long size, struct fsck_options *options) | |
842 | { | |
843 | struct object_id tagged_oid; | |
844 | int ret = 0; | |
845 | char *eol; | |
846 | struct strbuf sb = STRBUF_INIT; | |
847 | const char *p; | |
848 | ||
849 | ret = verify_headers(buffer, size, oid, OBJ_TAG, options); | |
850 | if (ret) | |
851 | goto done; | |
852 | ||
853 | if (!skip_prefix(buffer, "object ", &buffer)) { | |
854 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_OBJECT, "invalid format - expected 'object' line"); | |
855 | goto done; | |
856 | } | |
857 | if (parse_oid_hex(buffer, &tagged_oid, &p) || *p != '\n') { | |
858 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_BAD_OBJECT_SHA1, "invalid 'object' line format - bad sha1"); | |
859 | if (ret) | |
860 | goto done; | |
861 | } | |
862 | buffer = p + 1; | |
863 | ||
864 | if (!skip_prefix(buffer, "type ", &buffer)) { | |
865 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TYPE_ENTRY, "invalid format - expected 'type' line"); | |
866 | goto done; | |
867 | } | |
868 | eol = strchr(buffer, '\n'); | |
869 | if (!eol) { | |
870 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TYPE, "invalid format - unexpected end after 'type' line"); | |
871 | goto done; | |
872 | } | |
873 | if (type_from_string_gently(buffer, eol - buffer, 1) < 0) | |
874 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_BAD_TYPE, "invalid 'type' value"); | |
875 | if (ret) | |
876 | goto done; | |
877 | buffer = eol + 1; | |
878 | ||
879 | if (!skip_prefix(buffer, "tag ", &buffer)) { | |
880 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAG_ENTRY, "invalid format - expected 'tag' line"); | |
881 | goto done; | |
882 | } | |
883 | eol = strchr(buffer, '\n'); | |
884 | if (!eol) { | |
885 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAG, "invalid format - unexpected end after 'type' line"); | |
886 | goto done; | |
887 | } | |
888 | strbuf_addf(&sb, "refs/tags/%.*s", (int)(eol - buffer), buffer); | |
889 | if (check_refname_format(sb.buf, 0)) { | |
890 | ret = report(options, oid, OBJ_TAG, | |
891 | FSCK_MSG_BAD_TAG_NAME, | |
892 | "invalid 'tag' name: %.*s", | |
893 | (int)(eol - buffer), buffer); | |
894 | if (ret) | |
895 | goto done; | |
896 | } | |
897 | buffer = eol + 1; | |
898 | ||
899 | if (!skip_prefix(buffer, "tagger ", &buffer)) { | |
900 | /* early tags do not contain 'tagger' lines; warn only */ | |
901 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAGGER_ENTRY, "invalid format - expected 'tagger' line"); | |
902 | if (ret) | |
903 | goto done; | |
904 | } | |
905 | else | |
906 | ret = fsck_ident(&buffer, oid, OBJ_TAG, options); | |
907 | ||
908 | done: | |
909 | strbuf_release(&sb); | |
910 | return ret; | |
911 | } | |
912 | ||
913 | struct fsck_gitmodules_data { | |
914 | const struct object_id *oid; | |
915 | struct fsck_options *options; | |
916 | int ret; | |
917 | }; | |
918 | ||
919 | static int fsck_gitmodules_fn(const char *var, const char *value, void *vdata) | |
920 | { | |
921 | struct fsck_gitmodules_data *data = vdata; | |
922 | const char *subsection, *key; | |
923 | int subsection_len; | |
924 | char *name; | |
925 | ||
926 | if (parse_config_key(var, "submodule", &subsection, &subsection_len, &key) < 0 || | |
927 | !subsection) | |
928 | return 0; | |
929 | ||
930 | name = xmemdupz(subsection, subsection_len); | |
931 | if (check_submodule_name(name) < 0) | |
932 | data->ret |= report(data->options, | |
933 | data->oid, OBJ_BLOB, | |
934 | FSCK_MSG_GITMODULES_NAME, | |
935 | "disallowed submodule name: %s", | |
936 | name); | |
937 | if (!strcmp(key, "url") && value && | |
938 | looks_like_command_line_option(value)) | |
939 | data->ret |= report(data->options, | |
940 | data->oid, OBJ_BLOB, | |
941 | FSCK_MSG_GITMODULES_URL, | |
942 | "disallowed submodule url: %s", | |
943 | value); | |
944 | if (!strcmp(key, "path") && value && | |
945 | looks_like_command_line_option(value)) | |
946 | data->ret |= report(data->options, | |
947 | data->oid, OBJ_BLOB, | |
948 | FSCK_MSG_GITMODULES_PATH, | |
949 | "disallowed submodule path: %s", | |
950 | value); | |
951 | if (!strcmp(key, "update") && value && | |
952 | parse_submodule_update_type(value) == SM_UPDATE_COMMAND) | |
953 | data->ret |= report(data->options, data->oid, OBJ_BLOB, | |
954 | FSCK_MSG_GITMODULES_UPDATE, | |
955 | "disallowed submodule update setting: %s", | |
956 | value); | |
957 | free(name); | |
958 | ||
959 | return 0; | |
960 | } | |
961 | ||
962 | static int fsck_blob(const struct object_id *oid, const char *buf, | |
963 | unsigned long size, struct fsck_options *options) | |
964 | { | |
965 | struct fsck_gitmodules_data data; | |
966 | struct config_options config_opts = { 0 }; | |
967 | ||
968 | if (!oidset_contains(&gitmodules_found, oid)) | |
969 | return 0; | |
970 | oidset_insert(&gitmodules_done, oid); | |
971 | ||
972 | if (object_on_skiplist(options, oid)) | |
973 | return 0; | |
974 | ||
975 | if (!buf) { | |
976 | /* | |
977 | * A missing buffer here is a sign that the caller found the | |
978 | * blob too gigantic to load into memory. Let's just consider | |
979 | * that an error. | |
980 | */ | |
981 | return report(options, oid, OBJ_BLOB, | |
982 | FSCK_MSG_GITMODULES_LARGE, | |
983 | ".gitmodules too large to parse"); | |
984 | } | |
985 | ||
986 | data.oid = oid; | |
987 | data.options = options; | |
988 | data.ret = 0; | |
989 | config_opts.error_action = CONFIG_ERROR_SILENT; | |
990 | if (git_config_from_mem(fsck_gitmodules_fn, CONFIG_ORIGIN_BLOB, | |
991 | ".gitmodules", buf, size, &data, &config_opts)) | |
992 | data.ret |= report(options, oid, OBJ_BLOB, | |
993 | FSCK_MSG_GITMODULES_PARSE, | |
994 | "could not parse gitmodules blob"); | |
995 | ||
996 | return data.ret; | |
997 | } | |
998 | ||
999 | int fsck_object(struct object *obj, void *data, unsigned long size, | |
1000 | struct fsck_options *options) | |
1001 | { | |
1002 | if (!obj) | |
1003 | return report(options, NULL, OBJ_NONE, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck"); | |
1004 | ||
1005 | if (obj->type == OBJ_BLOB) | |
1006 | return fsck_blob(&obj->oid, data, size, options); | |
1007 | if (obj->type == OBJ_TREE) | |
1008 | return fsck_tree(&obj->oid, data, size, options); | |
1009 | if (obj->type == OBJ_COMMIT) | |
1010 | return fsck_commit(&obj->oid, data, size, options); | |
1011 | if (obj->type == OBJ_TAG) | |
1012 | return fsck_tag(&obj->oid, data, size, options); | |
1013 | ||
1014 | return report(options, &obj->oid, obj->type, | |
1015 | FSCK_MSG_UNKNOWN_TYPE, | |
1016 | "unknown type '%d' (internal fsck error)", | |
1017 | obj->type); | |
1018 | } | |
1019 | ||
1020 | int fsck_error_function(struct fsck_options *o, | |
1021 | const struct object_id *oid, | |
1022 | enum object_type object_type, | |
1023 | int msg_type, const char *message) | |
1024 | { | |
1025 | if (msg_type == FSCK_WARN) { | |
1026 | warning("object %s: %s", fsck_describe_object(o, oid), message); | |
1027 | return 0; | |
1028 | } | |
1029 | error("object %s: %s", fsck_describe_object(o, oid), message); | |
1030 | return 1; | |
1031 | } | |
1032 | ||
1033 | int fsck_finish(struct fsck_options *options) | |
1034 | { | |
1035 | int ret = 0; | |
1036 | struct oidset_iter iter; | |
1037 | const struct object_id *oid; | |
1038 | ||
1039 | oidset_iter_init(&gitmodules_found, &iter); | |
1040 | while ((oid = oidset_iter_next(&iter))) { | |
1041 | enum object_type type; | |
1042 | unsigned long size; | |
1043 | char *buf; | |
1044 | ||
1045 | if (oidset_contains(&gitmodules_done, oid)) | |
1046 | continue; | |
1047 | ||
1048 | buf = read_object_file(oid, &type, &size); | |
1049 | if (!buf) { | |
1050 | if (is_promisor_object(oid)) | |
1051 | continue; | |
1052 | ret |= report(options, | |
1053 | oid, OBJ_BLOB, | |
1054 | FSCK_MSG_GITMODULES_MISSING, | |
1055 | "unable to read .gitmodules blob"); | |
1056 | continue; | |
1057 | } | |
1058 | ||
1059 | if (type == OBJ_BLOB) | |
1060 | ret |= fsck_blob(oid, buf, size, options); | |
1061 | else | |
1062 | ret |= report(options, | |
1063 | oid, type, | |
1064 | FSCK_MSG_GITMODULES_BLOB, | |
1065 | "non-blob found at .gitmodules"); | |
1066 | free(buf); | |
1067 | } | |
1068 | ||
1069 | ||
1070 | oidset_clear(&gitmodules_found); | |
1071 | oidset_clear(&gitmodules_done); | |
1072 | return ret; | |
1073 | } |