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1 | #include "cache.h" | |
2 | #include "object.h" | |
3 | #include "blob.h" | |
4 | #include "tree.h" | |
5 | #include "tree-walk.h" | |
6 | #include "commit.h" | |
7 | #include "tag.h" | |
8 | #include "fsck.h" | |
9 | #include "refs.h" | |
10 | #include "utf8.h" | |
11 | #include "sha1-array.h" | |
12 | #include "decorate.h" | |
13 | ||
14 | #define FSCK_FATAL -1 | |
15 | #define FSCK_INFO -2 | |
16 | ||
17 | #define FOREACH_MSG_ID(FUNC) \ | |
18 | /* fatal errors */ \ | |
19 | FUNC(NUL_IN_HEADER, FATAL) \ | |
20 | FUNC(UNTERMINATED_HEADER, FATAL) \ | |
21 | /* errors */ \ | |
22 | FUNC(BAD_DATE, ERROR) \ | |
23 | FUNC(BAD_DATE_OVERFLOW, ERROR) \ | |
24 | FUNC(BAD_EMAIL, ERROR) \ | |
25 | FUNC(BAD_NAME, ERROR) \ | |
26 | FUNC(BAD_OBJECT_SHA1, ERROR) \ | |
27 | FUNC(BAD_PARENT_SHA1, ERROR) \ | |
28 | FUNC(BAD_TAG_OBJECT, ERROR) \ | |
29 | FUNC(BAD_TIMEZONE, ERROR) \ | |
30 | FUNC(BAD_TREE, ERROR) \ | |
31 | FUNC(BAD_TREE_SHA1, ERROR) \ | |
32 | FUNC(BAD_TYPE, ERROR) \ | |
33 | FUNC(DUPLICATE_ENTRIES, ERROR) \ | |
34 | FUNC(MISSING_AUTHOR, ERROR) \ | |
35 | FUNC(MISSING_COMMITTER, ERROR) \ | |
36 | FUNC(MISSING_EMAIL, ERROR) \ | |
37 | FUNC(MISSING_GRAFT, ERROR) \ | |
38 | FUNC(MISSING_NAME_BEFORE_EMAIL, ERROR) \ | |
39 | FUNC(MISSING_OBJECT, ERROR) \ | |
40 | FUNC(MISSING_PARENT, ERROR) \ | |
41 | FUNC(MISSING_SPACE_BEFORE_DATE, ERROR) \ | |
42 | FUNC(MISSING_SPACE_BEFORE_EMAIL, ERROR) \ | |
43 | FUNC(MISSING_TAG, ERROR) \ | |
44 | FUNC(MISSING_TAG_ENTRY, ERROR) \ | |
45 | FUNC(MISSING_TAG_OBJECT, ERROR) \ | |
46 | FUNC(MISSING_TREE, ERROR) \ | |
47 | FUNC(MISSING_TYPE, ERROR) \ | |
48 | FUNC(MISSING_TYPE_ENTRY, ERROR) \ | |
49 | FUNC(MULTIPLE_AUTHORS, ERROR) \ | |
50 | FUNC(TAG_OBJECT_NOT_TAG, ERROR) \ | |
51 | FUNC(TREE_NOT_SORTED, ERROR) \ | |
52 | FUNC(UNKNOWN_TYPE, ERROR) \ | |
53 | FUNC(ZERO_PADDED_DATE, ERROR) \ | |
54 | /* warnings */ \ | |
55 | FUNC(BAD_FILEMODE, WARN) \ | |
56 | FUNC(EMPTY_NAME, WARN) \ | |
57 | FUNC(FULL_PATHNAME, WARN) \ | |
58 | FUNC(HAS_DOT, WARN) \ | |
59 | FUNC(HAS_DOTDOT, WARN) \ | |
60 | FUNC(HAS_DOTGIT, WARN) \ | |
61 | FUNC(NULL_SHA1, WARN) \ | |
62 | FUNC(ZERO_PADDED_FILEMODE, WARN) \ | |
63 | FUNC(NUL_IN_COMMIT, WARN) \ | |
64 | /* infos (reported as warnings, but ignored by default) */ \ | |
65 | FUNC(BAD_TAG_NAME, INFO) \ | |
66 | FUNC(MISSING_TAGGER_ENTRY, INFO) | |
67 | ||
68 | #define MSG_ID(id, msg_type) FSCK_MSG_##id, | |
69 | enum fsck_msg_id { | |
70 | FOREACH_MSG_ID(MSG_ID) | |
71 | FSCK_MSG_MAX | |
72 | }; | |
73 | #undef MSG_ID | |
74 | ||
75 | #define STR(x) #x | |
76 | #define MSG_ID(id, msg_type) { STR(id), NULL, FSCK_##msg_type }, | |
77 | static struct { | |
78 | const char *id_string; | |
79 | const char *downcased; | |
80 | int msg_type; | |
81 | } msg_id_info[FSCK_MSG_MAX + 1] = { | |
82 | FOREACH_MSG_ID(MSG_ID) | |
83 | { NULL, NULL, -1 } | |
84 | }; | |
85 | #undef MSG_ID | |
86 | ||
87 | static int parse_msg_id(const char *text) | |
88 | { | |
89 | int i; | |
90 | ||
91 | if (!msg_id_info[0].downcased) { | |
92 | /* convert id_string to lower case, without underscores. */ | |
93 | for (i = 0; i < FSCK_MSG_MAX; i++) { | |
94 | const char *p = msg_id_info[i].id_string; | |
95 | int len = strlen(p); | |
96 | char *q = xmalloc(len); | |
97 | ||
98 | msg_id_info[i].downcased = q; | |
99 | while (*p) | |
100 | if (*p == '_') | |
101 | p++; | |
102 | else | |
103 | *(q)++ = tolower(*(p)++); | |
104 | *q = '\0'; | |
105 | } | |
106 | } | |
107 | ||
108 | for (i = 0; i < FSCK_MSG_MAX; i++) | |
109 | if (!strcmp(text, msg_id_info[i].downcased)) | |
110 | return i; | |
111 | ||
112 | return -1; | |
113 | } | |
114 | ||
115 | static int fsck_msg_type(enum fsck_msg_id msg_id, | |
116 | struct fsck_options *options) | |
117 | { | |
118 | int msg_type; | |
119 | ||
120 | assert(msg_id >= 0 && msg_id < FSCK_MSG_MAX); | |
121 | ||
122 | if (options->msg_type) | |
123 | msg_type = options->msg_type[msg_id]; | |
124 | else { | |
125 | msg_type = msg_id_info[msg_id].msg_type; | |
126 | if (options->strict && msg_type == FSCK_WARN) | |
127 | msg_type = FSCK_ERROR; | |
128 | } | |
129 | ||
130 | return msg_type; | |
131 | } | |
132 | ||
133 | static void init_skiplist(struct fsck_options *options, const char *path) | |
134 | { | |
135 | static struct oid_array skiplist = OID_ARRAY_INIT; | |
136 | int sorted, fd; | |
137 | char buffer[GIT_MAX_HEXSZ + 1]; | |
138 | struct object_id oid; | |
139 | ||
140 | if (options->skiplist) | |
141 | sorted = options->skiplist->sorted; | |
142 | else { | |
143 | sorted = 1; | |
144 | options->skiplist = &skiplist; | |
145 | } | |
146 | ||
147 | fd = open(path, O_RDONLY); | |
148 | if (fd < 0) | |
149 | die("Could not open skip list: %s", path); | |
150 | for (;;) { | |
151 | const char *p; | |
152 | int result = read_in_full(fd, buffer, sizeof(buffer)); | |
153 | if (result < 0) | |
154 | die_errno("Could not read '%s'", path); | |
155 | if (!result) | |
156 | break; | |
157 | if (parse_oid_hex(buffer, &oid, &p) || *p != '\n') | |
158 | die("Invalid SHA-1: %s", buffer); | |
159 | oid_array_append(&skiplist, &oid); | |
160 | if (sorted && skiplist.nr > 1 && | |
161 | oidcmp(&skiplist.oid[skiplist.nr - 2], | |
162 | &oid) > 0) | |
163 | sorted = 0; | |
164 | } | |
165 | close(fd); | |
166 | ||
167 | if (sorted) | |
168 | skiplist.sorted = 1; | |
169 | } | |
170 | ||
171 | static int parse_msg_type(const char *str) | |
172 | { | |
173 | if (!strcmp(str, "error")) | |
174 | return FSCK_ERROR; | |
175 | else if (!strcmp(str, "warn")) | |
176 | return FSCK_WARN; | |
177 | else if (!strcmp(str, "ignore")) | |
178 | return FSCK_IGNORE; | |
179 | else | |
180 | die("Unknown fsck message type: '%s'", str); | |
181 | } | |
182 | ||
183 | int is_valid_msg_type(const char *msg_id, const char *msg_type) | |
184 | { | |
185 | if (parse_msg_id(msg_id) < 0) | |
186 | return 0; | |
187 | parse_msg_type(msg_type); | |
188 | return 1; | |
189 | } | |
190 | ||
191 | void fsck_set_msg_type(struct fsck_options *options, | |
192 | const char *msg_id, const char *msg_type) | |
193 | { | |
194 | int id = parse_msg_id(msg_id), type; | |
195 | ||
196 | if (id < 0) | |
197 | die("Unhandled message id: %s", msg_id); | |
198 | type = parse_msg_type(msg_type); | |
199 | ||
200 | if (type != FSCK_ERROR && msg_id_info[id].msg_type == FSCK_FATAL) | |
201 | die("Cannot demote %s to %s", msg_id, msg_type); | |
202 | ||
203 | if (!options->msg_type) { | |
204 | int i; | |
205 | int *msg_type; | |
206 | ALLOC_ARRAY(msg_type, FSCK_MSG_MAX); | |
207 | for (i = 0; i < FSCK_MSG_MAX; i++) | |
208 | msg_type[i] = fsck_msg_type(i, options); | |
209 | options->msg_type = msg_type; | |
210 | } | |
211 | ||
212 | options->msg_type[id] = type; | |
213 | } | |
214 | ||
215 | void fsck_set_msg_types(struct fsck_options *options, const char *values) | |
216 | { | |
217 | char *buf = xstrdup(values), *to_free = buf; | |
218 | int done = 0; | |
219 | ||
220 | while (!done) { | |
221 | int len = strcspn(buf, " ,|"), equal; | |
222 | ||
223 | done = !buf[len]; | |
224 | if (!len) { | |
225 | buf++; | |
226 | continue; | |
227 | } | |
228 | buf[len] = '\0'; | |
229 | ||
230 | for (equal = 0; | |
231 | equal < len && buf[equal] != '=' && buf[equal] != ':'; | |
232 | equal++) | |
233 | buf[equal] = tolower(buf[equal]); | |
234 | buf[equal] = '\0'; | |
235 | ||
236 | if (!strcmp(buf, "skiplist")) { | |
237 | if (equal == len) | |
238 | die("skiplist requires a path"); | |
239 | init_skiplist(options, buf + equal + 1); | |
240 | buf += len + 1; | |
241 | continue; | |
242 | } | |
243 | ||
244 | if (equal == len) | |
245 | die("Missing '=': '%s'", buf); | |
246 | ||
247 | fsck_set_msg_type(options, buf, buf + equal + 1); | |
248 | buf += len + 1; | |
249 | } | |
250 | free(to_free); | |
251 | } | |
252 | ||
253 | static void append_msg_id(struct strbuf *sb, const char *msg_id) | |
254 | { | |
255 | for (;;) { | |
256 | char c = *(msg_id)++; | |
257 | ||
258 | if (!c) | |
259 | break; | |
260 | if (c != '_') | |
261 | strbuf_addch(sb, tolower(c)); | |
262 | else { | |
263 | assert(*msg_id); | |
264 | strbuf_addch(sb, *(msg_id)++); | |
265 | } | |
266 | } | |
267 | ||
268 | strbuf_addstr(sb, ": "); | |
269 | } | |
270 | ||
271 | __attribute__((format (printf, 4, 5))) | |
272 | static int report(struct fsck_options *options, struct object *object, | |
273 | enum fsck_msg_id id, const char *fmt, ...) | |
274 | { | |
275 | va_list ap; | |
276 | struct strbuf sb = STRBUF_INIT; | |
277 | int msg_type = fsck_msg_type(id, options), result; | |
278 | ||
279 | if (msg_type == FSCK_IGNORE) | |
280 | return 0; | |
281 | ||
282 | if (options->skiplist && object && | |
283 | oid_array_lookup(options->skiplist, &object->oid) >= 0) | |
284 | return 0; | |
285 | ||
286 | if (msg_type == FSCK_FATAL) | |
287 | msg_type = FSCK_ERROR; | |
288 | else if (msg_type == FSCK_INFO) | |
289 | msg_type = FSCK_WARN; | |
290 | ||
291 | append_msg_id(&sb, msg_id_info[id].id_string); | |
292 | ||
293 | va_start(ap, fmt); | |
294 | strbuf_vaddf(&sb, fmt, ap); | |
295 | result = options->error_func(options, object, msg_type, sb.buf); | |
296 | strbuf_release(&sb); | |
297 | va_end(ap); | |
298 | ||
299 | return result; | |
300 | } | |
301 | ||
302 | static char *get_object_name(struct fsck_options *options, struct object *obj) | |
303 | { | |
304 | if (!options->object_names) | |
305 | return NULL; | |
306 | return lookup_decoration(options->object_names, obj); | |
307 | } | |
308 | ||
309 | static void put_object_name(struct fsck_options *options, struct object *obj, | |
310 | const char *fmt, ...) | |
311 | { | |
312 | va_list ap; | |
313 | struct strbuf buf = STRBUF_INIT; | |
314 | char *existing; | |
315 | ||
316 | if (!options->object_names) | |
317 | return; | |
318 | existing = lookup_decoration(options->object_names, obj); | |
319 | if (existing) | |
320 | return; | |
321 | va_start(ap, fmt); | |
322 | strbuf_vaddf(&buf, fmt, ap); | |
323 | add_decoration(options->object_names, obj, strbuf_detach(&buf, NULL)); | |
324 | va_end(ap); | |
325 | } | |
326 | ||
327 | static const char *describe_object(struct fsck_options *o, struct object *obj) | |
328 | { | |
329 | static struct strbuf buf = STRBUF_INIT; | |
330 | char *name; | |
331 | ||
332 | strbuf_reset(&buf); | |
333 | strbuf_addstr(&buf, oid_to_hex(&obj->oid)); | |
334 | if (o->object_names && (name = lookup_decoration(o->object_names, obj))) | |
335 | strbuf_addf(&buf, " (%s)", name); | |
336 | ||
337 | return buf.buf; | |
338 | } | |
339 | ||
340 | static int fsck_walk_tree(struct tree *tree, void *data, struct fsck_options *options) | |
341 | { | |
342 | struct tree_desc desc; | |
343 | struct name_entry entry; | |
344 | int res = 0; | |
345 | const char *name; | |
346 | ||
347 | if (parse_tree(tree)) | |
348 | return -1; | |
349 | ||
350 | name = get_object_name(options, &tree->object); | |
351 | if (init_tree_desc_gently(&desc, tree->buffer, tree->size)) | |
352 | return -1; | |
353 | while (tree_entry_gently(&desc, &entry)) { | |
354 | struct object *obj; | |
355 | int result; | |
356 | ||
357 | if (S_ISGITLINK(entry.mode)) | |
358 | continue; | |
359 | ||
360 | if (S_ISDIR(entry.mode)) { | |
361 | obj = (struct object *)lookup_tree(entry.oid); | |
362 | if (name && obj) | |
363 | put_object_name(options, obj, "%s%s/", name, | |
364 | entry.path); | |
365 | result = options->walk(obj, OBJ_TREE, data, options); | |
366 | } | |
367 | else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode)) { | |
368 | obj = (struct object *)lookup_blob(entry.oid); | |
369 | if (name && obj) | |
370 | put_object_name(options, obj, "%s%s", name, | |
371 | entry.path); | |
372 | result = options->walk(obj, OBJ_BLOB, data, options); | |
373 | } | |
374 | else { | |
375 | result = error("in tree %s: entry %s has bad mode %.6o", | |
376 | describe_object(options, &tree->object), entry.path, entry.mode); | |
377 | } | |
378 | if (result < 0) | |
379 | return result; | |
380 | if (!res) | |
381 | res = result; | |
382 | } | |
383 | return res; | |
384 | } | |
385 | ||
386 | static int fsck_walk_commit(struct commit *commit, void *data, struct fsck_options *options) | |
387 | { | |
388 | int counter = 0, generation = 0, name_prefix_len = 0; | |
389 | struct commit_list *parents; | |
390 | int res; | |
391 | int result; | |
392 | const char *name; | |
393 | ||
394 | if (parse_commit(commit)) | |
395 | return -1; | |
396 | ||
397 | name = get_object_name(options, &commit->object); | |
398 | if (name) | |
399 | put_object_name(options, &commit->tree->object, "%s:", name); | |
400 | ||
401 | result = options->walk((struct object *)commit->tree, OBJ_TREE, data, options); | |
402 | if (result < 0) | |
403 | return result; | |
404 | res = result; | |
405 | ||
406 | parents = commit->parents; | |
407 | if (name && parents) { | |
408 | int len = strlen(name), power; | |
409 | ||
410 | if (len && name[len - 1] == '^') { | |
411 | generation = 1; | |
412 | name_prefix_len = len - 1; | |
413 | } | |
414 | else { /* parse ~<generation> suffix */ | |
415 | for (generation = 0, power = 1; | |
416 | len && isdigit(name[len - 1]); | |
417 | power *= 10) | |
418 | generation += power * (name[--len] - '0'); | |
419 | if (power > 1 && len && name[len - 1] == '~') | |
420 | name_prefix_len = len - 1; | |
421 | } | |
422 | } | |
423 | ||
424 | while (parents) { | |
425 | if (name) { | |
426 | struct object *obj = &parents->item->object; | |
427 | ||
428 | if (++counter > 1) | |
429 | put_object_name(options, obj, "%s^%d", | |
430 | name, counter); | |
431 | else if (generation > 0) | |
432 | put_object_name(options, obj, "%.*s~%d", | |
433 | name_prefix_len, name, generation + 1); | |
434 | else | |
435 | put_object_name(options, obj, "%s^", name); | |
436 | } | |
437 | result = options->walk((struct object *)parents->item, OBJ_COMMIT, data, options); | |
438 | if (result < 0) | |
439 | return result; | |
440 | if (!res) | |
441 | res = result; | |
442 | parents = parents->next; | |
443 | } | |
444 | return res; | |
445 | } | |
446 | ||
447 | static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *options) | |
448 | { | |
449 | char *name = get_object_name(options, &tag->object); | |
450 | ||
451 | if (parse_tag(tag)) | |
452 | return -1; | |
453 | if (name) | |
454 | put_object_name(options, tag->tagged, "%s", name); | |
455 | return options->walk(tag->tagged, OBJ_ANY, data, options); | |
456 | } | |
457 | ||
458 | int fsck_walk(struct object *obj, void *data, struct fsck_options *options) | |
459 | { | |
460 | if (!obj) | |
461 | return -1; | |
462 | ||
463 | if (obj->type == OBJ_NONE) | |
464 | parse_object(&obj->oid); | |
465 | ||
466 | switch (obj->type) { | |
467 | case OBJ_BLOB: | |
468 | return 0; | |
469 | case OBJ_TREE: | |
470 | return fsck_walk_tree((struct tree *)obj, data, options); | |
471 | case OBJ_COMMIT: | |
472 | return fsck_walk_commit((struct commit *)obj, data, options); | |
473 | case OBJ_TAG: | |
474 | return fsck_walk_tag((struct tag *)obj, data, options); | |
475 | default: | |
476 | error("Unknown object type for %s", describe_object(options, obj)); | |
477 | return -1; | |
478 | } | |
479 | } | |
480 | ||
481 | /* | |
482 | * The entries in a tree are ordered in the _path_ order, | |
483 | * which means that a directory entry is ordered by adding | |
484 | * a slash to the end of it. | |
485 | * | |
486 | * So a directory called "a" is ordered _after_ a file | |
487 | * called "a.c", because "a/" sorts after "a.c". | |
488 | */ | |
489 | #define TREE_UNORDERED (-1) | |
490 | #define TREE_HAS_DUPS (-2) | |
491 | ||
492 | static int verify_ordered(unsigned mode1, const char *name1, unsigned mode2, const char *name2) | |
493 | { | |
494 | int len1 = strlen(name1); | |
495 | int len2 = strlen(name2); | |
496 | int len = len1 < len2 ? len1 : len2; | |
497 | unsigned char c1, c2; | |
498 | int cmp; | |
499 | ||
500 | cmp = memcmp(name1, name2, len); | |
501 | if (cmp < 0) | |
502 | return 0; | |
503 | if (cmp > 0) | |
504 | return TREE_UNORDERED; | |
505 | ||
506 | /* | |
507 | * Ok, the first <len> characters are the same. | |
508 | * Now we need to order the next one, but turn | |
509 | * a '\0' into a '/' for a directory entry. | |
510 | */ | |
511 | c1 = name1[len]; | |
512 | c2 = name2[len]; | |
513 | if (!c1 && !c2) | |
514 | /* | |
515 | * git-write-tree used to write out a nonsense tree that has | |
516 | * entries with the same name, one blob and one tree. Make | |
517 | * sure we do not have duplicate entries. | |
518 | */ | |
519 | return TREE_HAS_DUPS; | |
520 | if (!c1 && S_ISDIR(mode1)) | |
521 | c1 = '/'; | |
522 | if (!c2 && S_ISDIR(mode2)) | |
523 | c2 = '/'; | |
524 | return c1 < c2 ? 0 : TREE_UNORDERED; | |
525 | } | |
526 | ||
527 | static int fsck_tree(struct tree *item, struct fsck_options *options) | |
528 | { | |
529 | int retval = 0; | |
530 | int has_null_sha1 = 0; | |
531 | int has_full_path = 0; | |
532 | int has_empty_name = 0; | |
533 | int has_dot = 0; | |
534 | int has_dotdot = 0; | |
535 | int has_dotgit = 0; | |
536 | int has_zero_pad = 0; | |
537 | int has_bad_modes = 0; | |
538 | int has_dup_entries = 0; | |
539 | int not_properly_sorted = 0; | |
540 | struct tree_desc desc; | |
541 | unsigned o_mode; | |
542 | const char *o_name; | |
543 | ||
544 | if (init_tree_desc_gently(&desc, item->buffer, item->size)) { | |
545 | retval += report(options, &item->object, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree"); | |
546 | return retval; | |
547 | } | |
548 | ||
549 | o_mode = 0; | |
550 | o_name = NULL; | |
551 | ||
552 | while (desc.size) { | |
553 | unsigned mode; | |
554 | const char *name, *backslash; | |
555 | const struct object_id *oid; | |
556 | ||
557 | oid = tree_entry_extract(&desc, &name, &mode); | |
558 | ||
559 | has_null_sha1 |= is_null_oid(oid); | |
560 | has_full_path |= !!strchr(name, '/'); | |
561 | has_empty_name |= !*name; | |
562 | has_dot |= !strcmp(name, "."); | |
563 | has_dotdot |= !strcmp(name, ".."); | |
564 | has_dotgit |= (!strcmp(name, ".git") || | |
565 | is_hfs_dotgit(name) || | |
566 | is_ntfs_dotgit(name)); | |
567 | has_zero_pad |= *(char *)desc.buffer == '0'; | |
568 | ||
569 | if ((backslash = strchr(name, '\\'))) { | |
570 | while (backslash) { | |
571 | backslash++; | |
572 | has_dotgit |= is_ntfs_dotgit(backslash); | |
573 | backslash = strchr(backslash, '\\'); | |
574 | } | |
575 | } | |
576 | ||
577 | if (update_tree_entry_gently(&desc)) { | |
578 | retval += report(options, &item->object, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree"); | |
579 | break; | |
580 | } | |
581 | ||
582 | switch (mode) { | |
583 | /* | |
584 | * Standard modes.. | |
585 | */ | |
586 | case S_IFREG | 0755: | |
587 | case S_IFREG | 0644: | |
588 | case S_IFLNK: | |
589 | case S_IFDIR: | |
590 | case S_IFGITLINK: | |
591 | break; | |
592 | /* | |
593 | * This is nonstandard, but we had a few of these | |
594 | * early on when we honored the full set of mode | |
595 | * bits.. | |
596 | */ | |
597 | case S_IFREG | 0664: | |
598 | if (!options->strict) | |
599 | break; | |
600 | default: | |
601 | has_bad_modes = 1; | |
602 | } | |
603 | ||
604 | if (o_name) { | |
605 | switch (verify_ordered(o_mode, o_name, mode, name)) { | |
606 | case TREE_UNORDERED: | |
607 | not_properly_sorted = 1; | |
608 | break; | |
609 | case TREE_HAS_DUPS: | |
610 | has_dup_entries = 1; | |
611 | break; | |
612 | default: | |
613 | break; | |
614 | } | |
615 | } | |
616 | ||
617 | o_mode = mode; | |
618 | o_name = name; | |
619 | } | |
620 | ||
621 | if (has_null_sha1) | |
622 | retval += report(options, &item->object, FSCK_MSG_NULL_SHA1, "contains entries pointing to null sha1"); | |
623 | if (has_full_path) | |
624 | retval += report(options, &item->object, FSCK_MSG_FULL_PATHNAME, "contains full pathnames"); | |
625 | if (has_empty_name) | |
626 | retval += report(options, &item->object, FSCK_MSG_EMPTY_NAME, "contains empty pathname"); | |
627 | if (has_dot) | |
628 | retval += report(options, &item->object, FSCK_MSG_HAS_DOT, "contains '.'"); | |
629 | if (has_dotdot) | |
630 | retval += report(options, &item->object, FSCK_MSG_HAS_DOTDOT, "contains '..'"); | |
631 | if (has_dotgit) | |
632 | retval += report(options, &item->object, FSCK_MSG_HAS_DOTGIT, "contains '.git'"); | |
633 | if (has_zero_pad) | |
634 | retval += report(options, &item->object, FSCK_MSG_ZERO_PADDED_FILEMODE, "contains zero-padded file modes"); | |
635 | if (has_bad_modes) | |
636 | retval += report(options, &item->object, FSCK_MSG_BAD_FILEMODE, "contains bad file modes"); | |
637 | if (has_dup_entries) | |
638 | retval += report(options, &item->object, FSCK_MSG_DUPLICATE_ENTRIES, "contains duplicate file entries"); | |
639 | if (not_properly_sorted) | |
640 | retval += report(options, &item->object, FSCK_MSG_TREE_NOT_SORTED, "not properly sorted"); | |
641 | return retval; | |
642 | } | |
643 | ||
644 | static int verify_headers(const void *data, unsigned long size, | |
645 | struct object *obj, struct fsck_options *options) | |
646 | { | |
647 | const char *buffer = (const char *)data; | |
648 | unsigned long i; | |
649 | ||
650 | for (i = 0; i < size; i++) { | |
651 | switch (buffer[i]) { | |
652 | case '\0': | |
653 | return report(options, obj, | |
654 | FSCK_MSG_NUL_IN_HEADER, | |
655 | "unterminated header: NUL at offset %ld", i); | |
656 | case '\n': | |
657 | if (i + 1 < size && buffer[i + 1] == '\n') | |
658 | return 0; | |
659 | } | |
660 | } | |
661 | ||
662 | /* | |
663 | * We did not find double-LF that separates the header | |
664 | * and the body. Not having a body is not a crime but | |
665 | * we do want to see the terminating LF for the last header | |
666 | * line. | |
667 | */ | |
668 | if (size && buffer[size - 1] == '\n') | |
669 | return 0; | |
670 | ||
671 | return report(options, obj, | |
672 | FSCK_MSG_UNTERMINATED_HEADER, "unterminated header"); | |
673 | } | |
674 | ||
675 | static int fsck_ident(const char **ident, struct object *obj, struct fsck_options *options) | |
676 | { | |
677 | const char *p = *ident; | |
678 | char *end; | |
679 | ||
680 | *ident = strchrnul(*ident, '\n'); | |
681 | if (**ident == '\n') | |
682 | (*ident)++; | |
683 | ||
684 | if (*p == '<') | |
685 | return report(options, obj, FSCK_MSG_MISSING_NAME_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); | |
686 | p += strcspn(p, "<>\n"); | |
687 | if (*p == '>') | |
688 | return report(options, obj, FSCK_MSG_BAD_NAME, "invalid author/committer line - bad name"); | |
689 | if (*p != '<') | |
690 | return report(options, obj, FSCK_MSG_MISSING_EMAIL, "invalid author/committer line - missing email"); | |
691 | if (p[-1] != ' ') | |
692 | return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); | |
693 | p++; | |
694 | p += strcspn(p, "<>\n"); | |
695 | if (*p != '>') | |
696 | return report(options, obj, FSCK_MSG_BAD_EMAIL, "invalid author/committer line - bad email"); | |
697 | p++; | |
698 | if (*p != ' ') | |
699 | return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_DATE, "invalid author/committer line - missing space before date"); | |
700 | p++; | |
701 | if (*p == '0' && p[1] != ' ') | |
702 | return report(options, obj, FSCK_MSG_ZERO_PADDED_DATE, "invalid author/committer line - zero-padded date"); | |
703 | if (date_overflows(parse_timestamp(p, &end, 10))) | |
704 | return report(options, obj, FSCK_MSG_BAD_DATE_OVERFLOW, "invalid author/committer line - date causes integer overflow"); | |
705 | if ((end == p || *end != ' ')) | |
706 | return report(options, obj, FSCK_MSG_BAD_DATE, "invalid author/committer line - bad date"); | |
707 | p = end + 1; | |
708 | if ((*p != '+' && *p != '-') || | |
709 | !isdigit(p[1]) || | |
710 | !isdigit(p[2]) || | |
711 | !isdigit(p[3]) || | |
712 | !isdigit(p[4]) || | |
713 | (p[5] != '\n')) | |
714 | return report(options, obj, FSCK_MSG_BAD_TIMEZONE, "invalid author/committer line - bad time zone"); | |
715 | p += 6; | |
716 | return 0; | |
717 | } | |
718 | ||
719 | static int fsck_commit_buffer(struct commit *commit, const char *buffer, | |
720 | unsigned long size, struct fsck_options *options) | |
721 | { | |
722 | unsigned char tree_sha1[20], sha1[20]; | |
723 | struct commit_graft *graft; | |
724 | unsigned parent_count, parent_line_count = 0, author_count; | |
725 | int err; | |
726 | const char *buffer_begin = buffer; | |
727 | ||
728 | if (verify_headers(buffer, size, &commit->object, options)) | |
729 | return -1; | |
730 | ||
731 | if (!skip_prefix(buffer, "tree ", &buffer)) | |
732 | return report(options, &commit->object, FSCK_MSG_MISSING_TREE, "invalid format - expected 'tree' line"); | |
733 | if (get_sha1_hex(buffer, tree_sha1) || buffer[40] != '\n') { | |
734 | err = report(options, &commit->object, FSCK_MSG_BAD_TREE_SHA1, "invalid 'tree' line format - bad sha1"); | |
735 | if (err) | |
736 | return err; | |
737 | } | |
738 | buffer += 41; | |
739 | while (skip_prefix(buffer, "parent ", &buffer)) { | |
740 | if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') { | |
741 | err = report(options, &commit->object, FSCK_MSG_BAD_PARENT_SHA1, "invalid 'parent' line format - bad sha1"); | |
742 | if (err) | |
743 | return err; | |
744 | } | |
745 | buffer += 41; | |
746 | parent_line_count++; | |
747 | } | |
748 | graft = lookup_commit_graft(commit->object.oid.hash); | |
749 | parent_count = commit_list_count(commit->parents); | |
750 | if (graft) { | |
751 | if (graft->nr_parent == -1 && !parent_count) | |
752 | ; /* shallow commit */ | |
753 | else if (graft->nr_parent != parent_count) { | |
754 | err = report(options, &commit->object, FSCK_MSG_MISSING_GRAFT, "graft objects missing"); | |
755 | if (err) | |
756 | return err; | |
757 | } | |
758 | } else { | |
759 | if (parent_count != parent_line_count) { | |
760 | err = report(options, &commit->object, FSCK_MSG_MISSING_PARENT, "parent objects missing"); | |
761 | if (err) | |
762 | return err; | |
763 | } | |
764 | } | |
765 | author_count = 0; | |
766 | while (skip_prefix(buffer, "author ", &buffer)) { | |
767 | author_count++; | |
768 | err = fsck_ident(&buffer, &commit->object, options); | |
769 | if (err) | |
770 | return err; | |
771 | } | |
772 | if (author_count < 1) | |
773 | err = report(options, &commit->object, FSCK_MSG_MISSING_AUTHOR, "invalid format - expected 'author' line"); | |
774 | else if (author_count > 1) | |
775 | err = report(options, &commit->object, FSCK_MSG_MULTIPLE_AUTHORS, "invalid format - multiple 'author' lines"); | |
776 | if (err) | |
777 | return err; | |
778 | if (!skip_prefix(buffer, "committer ", &buffer)) | |
779 | return report(options, &commit->object, FSCK_MSG_MISSING_COMMITTER, "invalid format - expected 'committer' line"); | |
780 | err = fsck_ident(&buffer, &commit->object, options); | |
781 | if (err) | |
782 | return err; | |
783 | if (!commit->tree) { | |
784 | err = report(options, &commit->object, FSCK_MSG_BAD_TREE, "could not load commit's tree %s", sha1_to_hex(tree_sha1)); | |
785 | if (err) | |
786 | return err; | |
787 | } | |
788 | if (memchr(buffer_begin, '\0', size)) { | |
789 | err = report(options, &commit->object, FSCK_MSG_NUL_IN_COMMIT, | |
790 | "NUL byte in the commit object body"); | |
791 | if (err) | |
792 | return err; | |
793 | } | |
794 | return 0; | |
795 | } | |
796 | ||
797 | static int fsck_commit(struct commit *commit, const char *data, | |
798 | unsigned long size, struct fsck_options *options) | |
799 | { | |
800 | const char *buffer = data ? data : get_commit_buffer(commit, &size); | |
801 | int ret = fsck_commit_buffer(commit, buffer, size, options); | |
802 | if (!data) | |
803 | unuse_commit_buffer(commit, buffer); | |
804 | return ret; | |
805 | } | |
806 | ||
807 | static int fsck_tag_buffer(struct tag *tag, const char *data, | |
808 | unsigned long size, struct fsck_options *options) | |
809 | { | |
810 | unsigned char sha1[20]; | |
811 | int ret = 0; | |
812 | const char *buffer; | |
813 | char *to_free = NULL, *eol; | |
814 | struct strbuf sb = STRBUF_INIT; | |
815 | ||
816 | if (data) | |
817 | buffer = data; | |
818 | else { | |
819 | enum object_type type; | |
820 | ||
821 | buffer = to_free = | |
822 | read_sha1_file(tag->object.oid.hash, &type, &size); | |
823 | if (!buffer) | |
824 | return report(options, &tag->object, | |
825 | FSCK_MSG_MISSING_TAG_OBJECT, | |
826 | "cannot read tag object"); | |
827 | ||
828 | if (type != OBJ_TAG) { | |
829 | ret = report(options, &tag->object, | |
830 | FSCK_MSG_TAG_OBJECT_NOT_TAG, | |
831 | "expected tag got %s", | |
832 | typename(type)); | |
833 | goto done; | |
834 | } | |
835 | } | |
836 | ||
837 | ret = verify_headers(buffer, size, &tag->object, options); | |
838 | if (ret) | |
839 | goto done; | |
840 | ||
841 | if (!skip_prefix(buffer, "object ", &buffer)) { | |
842 | ret = report(options, &tag->object, FSCK_MSG_MISSING_OBJECT, "invalid format - expected 'object' line"); | |
843 | goto done; | |
844 | } | |
845 | if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') { | |
846 | ret = report(options, &tag->object, FSCK_MSG_BAD_OBJECT_SHA1, "invalid 'object' line format - bad sha1"); | |
847 | if (ret) | |
848 | goto done; | |
849 | } | |
850 | buffer += 41; | |
851 | ||
852 | if (!skip_prefix(buffer, "type ", &buffer)) { | |
853 | ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE_ENTRY, "invalid format - expected 'type' line"); | |
854 | goto done; | |
855 | } | |
856 | eol = strchr(buffer, '\n'); | |
857 | if (!eol) { | |
858 | ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE, "invalid format - unexpected end after 'type' line"); | |
859 | goto done; | |
860 | } | |
861 | if (type_from_string_gently(buffer, eol - buffer, 1) < 0) | |
862 | ret = report(options, &tag->object, FSCK_MSG_BAD_TYPE, "invalid 'type' value"); | |
863 | if (ret) | |
864 | goto done; | |
865 | buffer = eol + 1; | |
866 | ||
867 | if (!skip_prefix(buffer, "tag ", &buffer)) { | |
868 | ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG_ENTRY, "invalid format - expected 'tag' line"); | |
869 | goto done; | |
870 | } | |
871 | eol = strchr(buffer, '\n'); | |
872 | if (!eol) { | |
873 | ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG, "invalid format - unexpected end after 'type' line"); | |
874 | goto done; | |
875 | } | |
876 | strbuf_addf(&sb, "refs/tags/%.*s", (int)(eol - buffer), buffer); | |
877 | if (check_refname_format(sb.buf, 0)) { | |
878 | ret = report(options, &tag->object, FSCK_MSG_BAD_TAG_NAME, | |
879 | "invalid 'tag' name: %.*s", | |
880 | (int)(eol - buffer), buffer); | |
881 | if (ret) | |
882 | goto done; | |
883 | } | |
884 | buffer = eol + 1; | |
885 | ||
886 | if (!skip_prefix(buffer, "tagger ", &buffer)) { | |
887 | /* early tags do not contain 'tagger' lines; warn only */ | |
888 | ret = report(options, &tag->object, FSCK_MSG_MISSING_TAGGER_ENTRY, "invalid format - expected 'tagger' line"); | |
889 | if (ret) | |
890 | goto done; | |
891 | } | |
892 | else | |
893 | ret = fsck_ident(&buffer, &tag->object, options); | |
894 | ||
895 | done: | |
896 | strbuf_release(&sb); | |
897 | free(to_free); | |
898 | return ret; | |
899 | } | |
900 | ||
901 | static int fsck_tag(struct tag *tag, const char *data, | |
902 | unsigned long size, struct fsck_options *options) | |
903 | { | |
904 | struct object *tagged = tag->tagged; | |
905 | ||
906 | if (!tagged) | |
907 | return report(options, &tag->object, FSCK_MSG_BAD_TAG_OBJECT, "could not load tagged object"); | |
908 | ||
909 | return fsck_tag_buffer(tag, data, size, options); | |
910 | } | |
911 | ||
912 | int fsck_object(struct object *obj, void *data, unsigned long size, | |
913 | struct fsck_options *options) | |
914 | { | |
915 | if (!obj) | |
916 | return report(options, obj, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck"); | |
917 | ||
918 | if (obj->type == OBJ_BLOB) | |
919 | return 0; | |
920 | if (obj->type == OBJ_TREE) | |
921 | return fsck_tree((struct tree *) obj, options); | |
922 | if (obj->type == OBJ_COMMIT) | |
923 | return fsck_commit((struct commit *) obj, (const char *) data, | |
924 | size, options); | |
925 | if (obj->type == OBJ_TAG) | |
926 | return fsck_tag((struct tag *) obj, (const char *) data, | |
927 | size, options); | |
928 | ||
929 | return report(options, obj, FSCK_MSG_UNKNOWN_TYPE, "unknown type '%d' (internal fsck error)", | |
930 | obj->type); | |
931 | } | |
932 | ||
933 | int fsck_error_function(struct fsck_options *o, | |
934 | struct object *obj, int msg_type, const char *message) | |
935 | { | |
936 | if (msg_type == FSCK_WARN) { | |
937 | warning("object %s: %s", describe_object(o, obj), message); | |
938 | return 0; | |
939 | } | |
940 | error("object %s: %s", describe_object(o, obj), message); | |
941 | return 1; | |
942 | } |