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Commit | Line | Data |
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355885d5 MK |
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" | |
cec097be | 9 | #include "refs.h" |
a18fcc9f | 10 | #include "utf8.h" |
cd94c6f9 | 11 | #include "sha1-array.h" |
7b35efd7 | 12 | #include "decorate.h" |
355885d5 | 13 | |
f50c4407 | 14 | #define FSCK_FATAL -1 |
f27d05b1 | 15 | #define FSCK_INFO -2 |
f50c4407 | 16 | |
c99ba492 | 17 | #define FOREACH_MSG_ID(FUNC) \ |
f50c4407 JS |
18 | /* fatal errors */ \ |
19 | FUNC(NUL_IN_HEADER, FATAL) \ | |
20 | FUNC(UNTERMINATED_HEADER, FATAL) \ | |
c99ba492 JS |
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) \ | |
c9ad147f | 49 | FUNC(MULTIPLE_AUTHORS, ERROR) \ |
c99ba492 JS |
50 | FUNC(TAG_OBJECT_NOT_TAG, ERROR) \ |
51 | FUNC(TREE_NOT_SORTED, ERROR) \ | |
52 | FUNC(UNKNOWN_TYPE, ERROR) \ | |
c99ba492 JS |
53 | FUNC(ZERO_PADDED_DATE, ERROR) \ |
54 | /* warnings */ \ | |
55 | FUNC(BAD_FILEMODE, WARN) \ | |
c99ba492 JS |
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) \ | |
c99ba492 | 61 | FUNC(NULL_SHA1, WARN) \ |
f27d05b1 | 62 | FUNC(ZERO_PADDED_FILEMODE, WARN) \ |
6d2d780f | 63 | FUNC(NUL_IN_COMMIT, WARN) \ |
f27d05b1 JS |
64 | /* infos (reported as warnings, but ignored by default) */ \ |
65 | FUNC(BAD_TAG_NAME, INFO) \ | |
66 | FUNC(MISSING_TAGGER_ENTRY, INFO) | |
c99ba492 JS |
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 | ||
f417eed8 JS |
75 | #define STR(x) #x |
76 | #define MSG_ID(id, msg_type) { STR(id), NULL, FSCK_##msg_type }, | |
c99ba492 | 77 | static struct { |
f417eed8 JS |
78 | const char *id_string; |
79 | const char *downcased; | |
c99ba492 JS |
80 | int msg_type; |
81 | } msg_id_info[FSCK_MSG_MAX + 1] = { | |
82 | FOREACH_MSG_ID(MSG_ID) | |
f417eed8 | 83 | { NULL, NULL, -1 } |
c99ba492 JS |
84 | }; |
85 | #undef MSG_ID | |
86 | ||
f417eed8 JS |
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 | ||
c99ba492 JS |
115 | static int fsck_msg_type(enum fsck_msg_id msg_id, |
116 | struct fsck_options *options) | |
117 | { | |
118 | int msg_type; | |
119 | ||
0282f4dc JS |
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 | } | |
c99ba492 JS |
129 | |
130 | return msg_type; | |
131 | } | |
132 | ||
cd94c6f9 JS |
133 | static void init_skiplist(struct fsck_options *options, const char *path) |
134 | { | |
135 | static struct sha1_array skiplist = SHA1_ARRAY_INIT; | |
136 | int sorted, fd; | |
137 | char buffer[41]; | |
138 | unsigned char sha1[20]; | |
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 | int result = read_in_full(fd, buffer, sizeof(buffer)); | |
152 | if (result < 0) | |
153 | die_errno("Could not read '%s'", path); | |
154 | if (!result) | |
155 | break; | |
156 | if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') | |
157 | die("Invalid SHA-1: %s", buffer); | |
158 | sha1_array_append(&skiplist, sha1); | |
159 | if (sorted && skiplist.nr > 1 && | |
160 | hashcmp(skiplist.sha1[skiplist.nr - 2], | |
161 | sha1) > 0) | |
162 | sorted = 0; | |
163 | } | |
164 | close(fd); | |
165 | ||
166 | if (sorted) | |
167 | skiplist.sorted = 1; | |
168 | } | |
169 | ||
0282f4dc JS |
170 | static int parse_msg_type(const char *str) |
171 | { | |
172 | if (!strcmp(str, "error")) | |
173 | return FSCK_ERROR; | |
174 | else if (!strcmp(str, "warn")) | |
175 | return FSCK_WARN; | |
efaba7cc JS |
176 | else if (!strcmp(str, "ignore")) |
177 | return FSCK_IGNORE; | |
0282f4dc JS |
178 | else |
179 | die("Unknown fsck message type: '%s'", str); | |
180 | } | |
181 | ||
5d477a33 JS |
182 | int is_valid_msg_type(const char *msg_id, const char *msg_type) |
183 | { | |
184 | if (parse_msg_id(msg_id) < 0) | |
185 | return 0; | |
186 | parse_msg_type(msg_type); | |
187 | return 1; | |
188 | } | |
189 | ||
0282f4dc JS |
190 | void fsck_set_msg_type(struct fsck_options *options, |
191 | const char *msg_id, const char *msg_type) | |
192 | { | |
193 | int id = parse_msg_id(msg_id), type; | |
194 | ||
195 | if (id < 0) | |
196 | die("Unhandled message id: %s", msg_id); | |
197 | type = parse_msg_type(msg_type); | |
198 | ||
f50c4407 JS |
199 | if (type != FSCK_ERROR && msg_id_info[id].msg_type == FSCK_FATAL) |
200 | die("Cannot demote %s to %s", msg_id, msg_type); | |
201 | ||
0282f4dc JS |
202 | if (!options->msg_type) { |
203 | int i; | |
b32fa95f JK |
204 | int *msg_type; |
205 | ALLOC_ARRAY(msg_type, FSCK_MSG_MAX); | |
0282f4dc JS |
206 | for (i = 0; i < FSCK_MSG_MAX; i++) |
207 | msg_type[i] = fsck_msg_type(i, options); | |
208 | options->msg_type = msg_type; | |
209 | } | |
210 | ||
211 | options->msg_type[id] = type; | |
212 | } | |
213 | ||
214 | void fsck_set_msg_types(struct fsck_options *options, const char *values) | |
215 | { | |
216 | char *buf = xstrdup(values), *to_free = buf; | |
217 | int done = 0; | |
218 | ||
219 | while (!done) { | |
220 | int len = strcspn(buf, " ,|"), equal; | |
221 | ||
222 | done = !buf[len]; | |
223 | if (!len) { | |
224 | buf++; | |
225 | continue; | |
226 | } | |
227 | buf[len] = '\0'; | |
228 | ||
229 | for (equal = 0; | |
230 | equal < len && buf[equal] != '=' && buf[equal] != ':'; | |
231 | equal++) | |
232 | buf[equal] = tolower(buf[equal]); | |
233 | buf[equal] = '\0'; | |
234 | ||
cd94c6f9 JS |
235 | if (!strcmp(buf, "skiplist")) { |
236 | if (equal == len) | |
237 | die("skiplist requires a path"); | |
238 | init_skiplist(options, buf + equal + 1); | |
239 | buf += len + 1; | |
240 | continue; | |
241 | } | |
242 | ||
0282f4dc JS |
243 | if (equal == len) |
244 | die("Missing '=': '%s'", buf); | |
355885d5 | 245 | |
0282f4dc JS |
246 | fsck_set_msg_type(options, buf, buf + equal + 1); |
247 | buf += len + 1; | |
248 | } | |
249 | free(to_free); | |
250 | } | |
251 | ||
71ab8fa8 JS |
252 | static void append_msg_id(struct strbuf *sb, const char *msg_id) |
253 | { | |
254 | for (;;) { | |
255 | char c = *(msg_id)++; | |
256 | ||
257 | if (!c) | |
258 | break; | |
259 | if (c != '_') | |
260 | strbuf_addch(sb, tolower(c)); | |
261 | else { | |
262 | assert(*msg_id); | |
263 | strbuf_addch(sb, *(msg_id)++); | |
264 | } | |
265 | } | |
266 | ||
267 | strbuf_addstr(sb, ": "); | |
268 | } | |
269 | ||
c99ba492 JS |
270 | __attribute__((format (printf, 4, 5))) |
271 | static int report(struct fsck_options *options, struct object *object, | |
272 | enum fsck_msg_id id, const char *fmt, ...) | |
273 | { | |
274 | va_list ap; | |
275 | struct strbuf sb = STRBUF_INIT; | |
276 | int msg_type = fsck_msg_type(id, options), result; | |
277 | ||
efaba7cc JS |
278 | if (msg_type == FSCK_IGNORE) |
279 | return 0; | |
280 | ||
cd94c6f9 | 281 | if (options->skiplist && object && |
ed1c9977 | 282 | sha1_array_lookup(options->skiplist, object->oid.hash) >= 0) |
cd94c6f9 JS |
283 | return 0; |
284 | ||
f50c4407 JS |
285 | if (msg_type == FSCK_FATAL) |
286 | msg_type = FSCK_ERROR; | |
f27d05b1 JS |
287 | else if (msg_type == FSCK_INFO) |
288 | msg_type = FSCK_WARN; | |
f50c4407 | 289 | |
71ab8fa8 JS |
290 | append_msg_id(&sb, msg_id_info[id].id_string); |
291 | ||
c99ba492 JS |
292 | va_start(ap, fmt); |
293 | strbuf_vaddf(&sb, fmt, ap); | |
1cd772cc | 294 | result = options->error_func(options, object, msg_type, sb.buf); |
c99ba492 JS |
295 | strbuf_release(&sb); |
296 | va_end(ap); | |
297 | ||
298 | return result; | |
299 | } | |
300 | ||
7b35efd7 JS |
301 | static char *get_object_name(struct fsck_options *options, struct object *obj) |
302 | { | |
303 | if (!options->object_names) | |
304 | return NULL; | |
305 | return lookup_decoration(options->object_names, obj); | |
306 | } | |
307 | ||
308 | static void put_object_name(struct fsck_options *options, struct object *obj, | |
309 | const char *fmt, ...) | |
310 | { | |
311 | va_list ap; | |
312 | struct strbuf buf = STRBUF_INIT; | |
313 | char *existing; | |
314 | ||
315 | if (!options->object_names) | |
316 | return; | |
317 | existing = lookup_decoration(options->object_names, obj); | |
318 | if (existing) | |
319 | return; | |
320 | va_start(ap, fmt); | |
321 | strbuf_vaddf(&buf, fmt, ap); | |
322 | add_decoration(options->object_names, obj, strbuf_detach(&buf, NULL)); | |
323 | va_end(ap); | |
324 | } | |
325 | ||
90cf590f JS |
326 | static const char *describe_object(struct fsck_options *o, struct object *obj) |
327 | { | |
328 | static struct strbuf buf = STRBUF_INIT; | |
329 | char *name; | |
330 | ||
331 | strbuf_reset(&buf); | |
332 | strbuf_addstr(&buf, oid_to_hex(&obj->oid)); | |
333 | if (o->object_names && (name = lookup_decoration(o->object_names, obj))) | |
334 | strbuf_addf(&buf, " (%s)", name); | |
335 | ||
336 | return buf.buf; | |
337 | } | |
338 | ||
22410549 | 339 | static int fsck_walk_tree(struct tree *tree, void *data, struct fsck_options *options) |
355885d5 MK |
340 | { |
341 | struct tree_desc desc; | |
342 | struct name_entry entry; | |
343 | int res = 0; | |
7b35efd7 | 344 | const char *name; |
355885d5 MK |
345 | |
346 | if (parse_tree(tree)) | |
347 | return -1; | |
348 | ||
7b35efd7 | 349 | name = get_object_name(options, &tree->object); |
355885d5 MK |
350 | init_tree_desc(&desc, tree->buffer, tree->size); |
351 | while (tree_entry(&desc, &entry)) { | |
7b35efd7 | 352 | struct object *obj; |
355885d5 MK |
353 | int result; |
354 | ||
355 | if (S_ISGITLINK(entry.mode)) | |
356 | continue; | |
7b35efd7 JS |
357 | |
358 | if (S_ISDIR(entry.mode)) { | |
359 | obj = &lookup_tree(entry.oid->hash)->object; | |
360 | if (name) | |
361 | put_object_name(options, obj, "%s%s/", name, | |
362 | entry.path); | |
363 | result = options->walk(obj, OBJ_TREE, data, options); | |
364 | } | |
365 | else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode)) { | |
366 | obj = &lookup_blob(entry.oid->hash)->object; | |
367 | if (name) | |
368 | put_object_name(options, obj, "%s%s", name, | |
369 | entry.path); | |
370 | result = options->walk(obj, OBJ_BLOB, data, options); | |
371 | } | |
355885d5 | 372 | else { |
82247e9b | 373 | result = error("in tree %s: entry %s has bad mode %.6o", |
90cf590f | 374 | describe_object(options, &tree->object), entry.path, entry.mode); |
355885d5 MK |
375 | } |
376 | if (result < 0) | |
377 | return result; | |
378 | if (!res) | |
379 | res = result; | |
380 | } | |
381 | return res; | |
382 | } | |
383 | ||
22410549 | 384 | static int fsck_walk_commit(struct commit *commit, void *data, struct fsck_options *options) |
355885d5 | 385 | { |
7b35efd7 | 386 | int counter = 0, generation = 0, name_prefix_len = 0; |
355885d5 MK |
387 | struct commit_list *parents; |
388 | int res; | |
389 | int result; | |
7b35efd7 | 390 | const char *name; |
355885d5 MK |
391 | |
392 | if (parse_commit(commit)) | |
393 | return -1; | |
394 | ||
7b35efd7 JS |
395 | name = get_object_name(options, &commit->object); |
396 | if (name) | |
397 | put_object_name(options, &commit->tree->object, "%s:", name); | |
398 | ||
22410549 | 399 | result = options->walk((struct object *)commit->tree, OBJ_TREE, data, options); |
355885d5 MK |
400 | if (result < 0) |
401 | return result; | |
402 | res = result; | |
403 | ||
404 | parents = commit->parents; | |
7b35efd7 JS |
405 | if (name && parents) { |
406 | int len = strlen(name), power; | |
407 | ||
408 | if (len && name[len - 1] == '^') { | |
409 | generation = 1; | |
410 | name_prefix_len = len - 1; | |
411 | } | |
412 | else { /* parse ~<generation> suffix */ | |
413 | for (generation = 0, power = 1; | |
414 | len && isdigit(name[len - 1]); | |
415 | power *= 10) | |
416 | generation += power * (name[--len] - '0'); | |
417 | if (power > 1 && len && name[len - 1] == '~') | |
418 | name_prefix_len = len - 1; | |
419 | } | |
420 | } | |
421 | ||
355885d5 | 422 | while (parents) { |
7b35efd7 JS |
423 | if (name) { |
424 | struct object *obj = &parents->item->object; | |
425 | ||
426 | if (++counter > 1) | |
427 | put_object_name(options, obj, "%s^%d", | |
428 | name, counter); | |
429 | else if (generation > 0) | |
430 | put_object_name(options, obj, "%.*s~%d", | |
431 | name_prefix_len, name, generation + 1); | |
432 | else | |
433 | put_object_name(options, obj, "%s^", name); | |
434 | } | |
22410549 | 435 | result = options->walk((struct object *)parents->item, OBJ_COMMIT, data, options); |
355885d5 MK |
436 | if (result < 0) |
437 | return result; | |
438 | if (!res) | |
439 | res = result; | |
440 | parents = parents->next; | |
441 | } | |
442 | return res; | |
443 | } | |
444 | ||
22410549 | 445 | static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *options) |
355885d5 | 446 | { |
7b35efd7 JS |
447 | char *name = get_object_name(options, &tag->object); |
448 | ||
355885d5 MK |
449 | if (parse_tag(tag)) |
450 | return -1; | |
7b35efd7 JS |
451 | if (name) |
452 | put_object_name(options, tag->tagged, "%s", name); | |
22410549 | 453 | return options->walk(tag->tagged, OBJ_ANY, data, options); |
355885d5 MK |
454 | } |
455 | ||
22410549 | 456 | int fsck_walk(struct object *obj, void *data, struct fsck_options *options) |
355885d5 MK |
457 | { |
458 | if (!obj) | |
459 | return -1; | |
460 | switch (obj->type) { | |
461 | case OBJ_BLOB: | |
462 | return 0; | |
463 | case OBJ_TREE: | |
22410549 | 464 | return fsck_walk_tree((struct tree *)obj, data, options); |
355885d5 | 465 | case OBJ_COMMIT: |
22410549 | 466 | return fsck_walk_commit((struct commit *)obj, data, options); |
355885d5 | 467 | case OBJ_TAG: |
22410549 | 468 | return fsck_walk_tag((struct tag *)obj, data, options); |
355885d5 | 469 | default: |
90cf590f | 470 | error("Unknown object type for %s", describe_object(options, obj)); |
355885d5 MK |
471 | return -1; |
472 | } | |
473 | } | |
ba002f3b MK |
474 | |
475 | /* | |
476 | * The entries in a tree are ordered in the _path_ order, | |
477 | * which means that a directory entry is ordered by adding | |
478 | * a slash to the end of it. | |
479 | * | |
480 | * So a directory called "a" is ordered _after_ a file | |
481 | * called "a.c", because "a/" sorts after "a.c". | |
482 | */ | |
483 | #define TREE_UNORDERED (-1) | |
484 | #define TREE_HAS_DUPS (-2) | |
485 | ||
486 | static int verify_ordered(unsigned mode1, const char *name1, unsigned mode2, const char *name2) | |
487 | { | |
488 | int len1 = strlen(name1); | |
489 | int len2 = strlen(name2); | |
490 | int len = len1 < len2 ? len1 : len2; | |
491 | unsigned char c1, c2; | |
492 | int cmp; | |
493 | ||
494 | cmp = memcmp(name1, name2, len); | |
495 | if (cmp < 0) | |
496 | return 0; | |
497 | if (cmp > 0) | |
498 | return TREE_UNORDERED; | |
499 | ||
500 | /* | |
501 | * Ok, the first <len> characters are the same. | |
502 | * Now we need to order the next one, but turn | |
503 | * a '\0' into a '/' for a directory entry. | |
504 | */ | |
505 | c1 = name1[len]; | |
506 | c2 = name2[len]; | |
507 | if (!c1 && !c2) | |
508 | /* | |
509 | * git-write-tree used to write out a nonsense tree that has | |
510 | * entries with the same name, one blob and one tree. Make | |
511 | * sure we do not have duplicate entries. | |
512 | */ | |
513 | return TREE_HAS_DUPS; | |
514 | if (!c1 && S_ISDIR(mode1)) | |
515 | c1 = '/'; | |
516 | if (!c2 && S_ISDIR(mode2)) | |
517 | c2 = '/'; | |
518 | return c1 < c2 ? 0 : TREE_UNORDERED; | |
519 | } | |
520 | ||
22410549 | 521 | static int fsck_tree(struct tree *item, struct fsck_options *options) |
ba002f3b MK |
522 | { |
523 | int retval; | |
c479d14a | 524 | int has_null_sha1 = 0; |
ba002f3b MK |
525 | int has_full_path = 0; |
526 | int has_empty_name = 0; | |
5d34a435 JK |
527 | int has_dot = 0; |
528 | int has_dotdot = 0; | |
5c17f512 | 529 | int has_dotgit = 0; |
ba002f3b MK |
530 | int has_zero_pad = 0; |
531 | int has_bad_modes = 0; | |
532 | int has_dup_entries = 0; | |
533 | int not_properly_sorted = 0; | |
534 | struct tree_desc desc; | |
535 | unsigned o_mode; | |
536 | const char *o_name; | |
ba002f3b MK |
537 | |
538 | init_tree_desc(&desc, item->buffer, item->size); | |
539 | ||
540 | o_mode = 0; | |
541 | o_name = NULL; | |
ba002f3b MK |
542 | |
543 | while (desc.size) { | |
544 | unsigned mode; | |
545 | const char *name; | |
ce6663a9 | 546 | const struct object_id *oid; |
ba002f3b | 547 | |
ce6663a9 | 548 | oid = tree_entry_extract(&desc, &name, &mode); |
ba002f3b | 549 | |
ce6663a9 | 550 | has_null_sha1 |= is_null_oid(oid); |
effd12ec HS |
551 | has_full_path |= !!strchr(name, '/'); |
552 | has_empty_name |= !*name; | |
553 | has_dot |= !strcmp(name, "."); | |
554 | has_dotdot |= !strcmp(name, ".."); | |
5e519fb8 JH |
555 | has_dotgit |= (!strcmp(name, ".git") || |
556 | is_hfs_dotgit(name) || | |
557 | is_ntfs_dotgit(name)); | |
ba002f3b MK |
558 | has_zero_pad |= *(char *)desc.buffer == '0'; |
559 | update_tree_entry(&desc); | |
560 | ||
561 | switch (mode) { | |
562 | /* | |
563 | * Standard modes.. | |
564 | */ | |
565 | case S_IFREG | 0755: | |
566 | case S_IFREG | 0644: | |
567 | case S_IFLNK: | |
568 | case S_IFDIR: | |
569 | case S_IFGITLINK: | |
570 | break; | |
571 | /* | |
572 | * This is nonstandard, but we had a few of these | |
573 | * early on when we honored the full set of mode | |
574 | * bits.. | |
575 | */ | |
576 | case S_IFREG | 0664: | |
22410549 | 577 | if (!options->strict) |
ba002f3b MK |
578 | break; |
579 | default: | |
580 | has_bad_modes = 1; | |
581 | } | |
582 | ||
583 | if (o_name) { | |
584 | switch (verify_ordered(o_mode, o_name, mode, name)) { | |
585 | case TREE_UNORDERED: | |
586 | not_properly_sorted = 1; | |
587 | break; | |
588 | case TREE_HAS_DUPS: | |
589 | has_dup_entries = 1; | |
590 | break; | |
591 | default: | |
592 | break; | |
593 | } | |
594 | } | |
595 | ||
596 | o_mode = mode; | |
597 | o_name = name; | |
ba002f3b MK |
598 | } |
599 | ||
600 | retval = 0; | |
c479d14a | 601 | if (has_null_sha1) |
c99ba492 | 602 | retval += report(options, &item->object, FSCK_MSG_NULL_SHA1, "contains entries pointing to null sha1"); |
ba002f3b | 603 | if (has_full_path) |
c99ba492 | 604 | retval += report(options, &item->object, FSCK_MSG_FULL_PATHNAME, "contains full pathnames"); |
ba002f3b | 605 | if (has_empty_name) |
c99ba492 | 606 | retval += report(options, &item->object, FSCK_MSG_EMPTY_NAME, "contains empty pathname"); |
5d34a435 | 607 | if (has_dot) |
c99ba492 | 608 | retval += report(options, &item->object, FSCK_MSG_HAS_DOT, "contains '.'"); |
5d34a435 | 609 | if (has_dotdot) |
c99ba492 | 610 | retval += report(options, &item->object, FSCK_MSG_HAS_DOTDOT, "contains '..'"); |
5c17f512 | 611 | if (has_dotgit) |
c99ba492 | 612 | retval += report(options, &item->object, FSCK_MSG_HAS_DOTGIT, "contains '.git'"); |
ba002f3b | 613 | if (has_zero_pad) |
c99ba492 | 614 | retval += report(options, &item->object, FSCK_MSG_ZERO_PADDED_FILEMODE, "contains zero-padded file modes"); |
ba002f3b | 615 | if (has_bad_modes) |
c99ba492 | 616 | retval += report(options, &item->object, FSCK_MSG_BAD_FILEMODE, "contains bad file modes"); |
ba002f3b | 617 | if (has_dup_entries) |
c99ba492 | 618 | retval += report(options, &item->object, FSCK_MSG_DUPLICATE_ENTRIES, "contains duplicate file entries"); |
ba002f3b | 619 | if (not_properly_sorted) |
c99ba492 | 620 | retval += report(options, &item->object, FSCK_MSG_TREE_NOT_SORTED, "not properly sorted"); |
ba002f3b MK |
621 | return retval; |
622 | } | |
623 | ||
84d18c0b | 624 | static int verify_headers(const void *data, unsigned long size, |
b2f44feb | 625 | struct object *obj, struct fsck_options *options) |
4d0d8975 JS |
626 | { |
627 | const char *buffer = (const char *)data; | |
628 | unsigned long i; | |
629 | ||
630 | for (i = 0; i < size; i++) { | |
631 | switch (buffer[i]) { | |
632 | case '\0': | |
c99ba492 JS |
633 | return report(options, obj, |
634 | FSCK_MSG_NUL_IN_HEADER, | |
635 | "unterminated header: NUL at offset %ld", i); | |
4d0d8975 JS |
636 | case '\n': |
637 | if (i + 1 < size && buffer[i + 1] == '\n') | |
638 | return 0; | |
639 | } | |
640 | } | |
641 | ||
84d18c0b JH |
642 | /* |
643 | * We did not find double-LF that separates the header | |
644 | * and the body. Not having a body is not a crime but | |
645 | * we do want to see the terminating LF for the last header | |
646 | * line. | |
647 | */ | |
648 | if (size && buffer[size - 1] == '\n') | |
649 | return 0; | |
650 | ||
c99ba492 JS |
651 | return report(options, obj, |
652 | FSCK_MSG_UNTERMINATED_HEADER, "unterminated header"); | |
4d0d8975 JS |
653 | } |
654 | ||
22410549 | 655 | static int fsck_ident(const char **ident, struct object *obj, struct fsck_options *options) |
daae1922 | 656 | { |
e6826e33 | 657 | const char *p = *ident; |
d4b8de04 JK |
658 | char *end; |
659 | ||
e6826e33 JS |
660 | *ident = strchrnul(*ident, '\n'); |
661 | if (**ident == '\n') | |
662 | (*ident)++; | |
663 | ||
664 | if (*p == '<') | |
c99ba492 | 665 | return report(options, obj, FSCK_MSG_MISSING_NAME_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); |
e6826e33 JS |
666 | p += strcspn(p, "<>\n"); |
667 | if (*p == '>') | |
c99ba492 | 668 | return report(options, obj, FSCK_MSG_BAD_NAME, "invalid author/committer line - bad name"); |
e6826e33 | 669 | if (*p != '<') |
c99ba492 | 670 | return report(options, obj, FSCK_MSG_MISSING_EMAIL, "invalid author/committer line - missing email"); |
e6826e33 | 671 | if (p[-1] != ' ') |
c99ba492 | 672 | return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); |
e6826e33 JS |
673 | p++; |
674 | p += strcspn(p, "<>\n"); | |
675 | if (*p != '>') | |
c99ba492 | 676 | return report(options, obj, FSCK_MSG_BAD_EMAIL, "invalid author/committer line - bad email"); |
e6826e33 JS |
677 | p++; |
678 | if (*p != ' ') | |
c99ba492 | 679 | return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_DATE, "invalid author/committer line - missing space before date"); |
e6826e33 JS |
680 | p++; |
681 | if (*p == '0' && p[1] != ' ') | |
c99ba492 | 682 | return report(options, obj, FSCK_MSG_ZERO_PADDED_DATE, "invalid author/committer line - zero-padded date"); |
e6826e33 | 683 | if (date_overflows(strtoul(p, &end, 10))) |
c99ba492 | 684 | return report(options, obj, FSCK_MSG_BAD_DATE_OVERFLOW, "invalid author/committer line - date causes integer overflow"); |
e6826e33 | 685 | if ((end == p || *end != ' ')) |
c99ba492 | 686 | return report(options, obj, FSCK_MSG_BAD_DATE, "invalid author/committer line - bad date"); |
e6826e33 JS |
687 | p = end + 1; |
688 | if ((*p != '+' && *p != '-') || | |
689 | !isdigit(p[1]) || | |
690 | !isdigit(p[2]) || | |
691 | !isdigit(p[3]) || | |
692 | !isdigit(p[4]) || | |
693 | (p[5] != '\n')) | |
c99ba492 | 694 | return report(options, obj, FSCK_MSG_BAD_TIMEZONE, "invalid author/committer line - bad time zone"); |
e6826e33 | 695 | p += 6; |
daae1922 JN |
696 | return 0; |
697 | } | |
698 | ||
bc6b8fc1 | 699 | static int fsck_commit_buffer(struct commit *commit, const char *buffer, |
22410549 | 700 | unsigned long size, struct fsck_options *options) |
ba002f3b | 701 | { |
ba002f3b MK |
702 | unsigned char tree_sha1[20], sha1[20]; |
703 | struct commit_graft *graft; | |
c9ad147f | 704 | unsigned parent_count, parent_line_count = 0, author_count; |
daae1922 | 705 | int err; |
6d2d780f | 706 | const char *buffer_begin = buffer; |
ba002f3b | 707 | |
b2f44feb | 708 | if (verify_headers(buffer, size, &commit->object, options)) |
4d0d8975 JS |
709 | return -1; |
710 | ||
cf4fff57 | 711 | if (!skip_prefix(buffer, "tree ", &buffer)) |
c99ba492 | 712 | return report(options, &commit->object, FSCK_MSG_MISSING_TREE, "invalid format - expected 'tree' line"); |
b3584761 JS |
713 | if (get_sha1_hex(buffer, tree_sha1) || buffer[40] != '\n') { |
714 | err = report(options, &commit->object, FSCK_MSG_BAD_TREE_SHA1, "invalid 'tree' line format - bad sha1"); | |
715 | if (err) | |
716 | return err; | |
717 | } | |
2d820a61 | 718 | buffer += 41; |
cf4fff57 | 719 | while (skip_prefix(buffer, "parent ", &buffer)) { |
b3584761 JS |
720 | if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') { |
721 | err = report(options, &commit->object, FSCK_MSG_BAD_PARENT_SHA1, "invalid 'parent' line format - bad sha1"); | |
722 | if (err) | |
723 | return err; | |
724 | } | |
2d820a61 | 725 | buffer += 41; |
9d02150c | 726 | parent_line_count++; |
ba002f3b | 727 | } |
ed1c9977 | 728 | graft = lookup_commit_graft(commit->object.oid.hash); |
9d02150c | 729 | parent_count = commit_list_count(commit->parents); |
ba002f3b | 730 | if (graft) { |
9d02150c | 731 | if (graft->nr_parent == -1 && !parent_count) |
ba002f3b | 732 | ; /* shallow commit */ |
b3584761 JS |
733 | else if (graft->nr_parent != parent_count) { |
734 | err = report(options, &commit->object, FSCK_MSG_MISSING_GRAFT, "graft objects missing"); | |
735 | if (err) | |
736 | return err; | |
737 | } | |
ba002f3b | 738 | } else { |
b3584761 JS |
739 | if (parent_count != parent_line_count) { |
740 | err = report(options, &commit->object, FSCK_MSG_MISSING_PARENT, "parent objects missing"); | |
741 | if (err) | |
742 | return err; | |
743 | } | |
ba002f3b | 744 | } |
c9ad147f JS |
745 | author_count = 0; |
746 | while (skip_prefix(buffer, "author ", &buffer)) { | |
747 | author_count++; | |
748 | err = fsck_ident(&buffer, &commit->object, options); | |
749 | if (err) | |
750 | return err; | |
ba002f3b | 751 | } |
c9ad147f JS |
752 | if (author_count < 1) |
753 | err = report(options, &commit->object, FSCK_MSG_MISSING_AUTHOR, "invalid format - expected 'author' line"); | |
754 | else if (author_count > 1) | |
755 | err = report(options, &commit->object, FSCK_MSG_MULTIPLE_AUTHORS, "invalid format - multiple 'author' lines"); | |
daae1922 JN |
756 | if (err) |
757 | return err; | |
cf4fff57 | 758 | if (!skip_prefix(buffer, "committer ", &buffer)) |
c99ba492 | 759 | return report(options, &commit->object, FSCK_MSG_MISSING_COMMITTER, "invalid format - expected 'committer' line"); |
22410549 | 760 | err = fsck_ident(&buffer, &commit->object, options); |
daae1922 JN |
761 | if (err) |
762 | return err; | |
5af29718 JH |
763 | if (!commit->tree) { |
764 | err = report(options, &commit->object, FSCK_MSG_BAD_TREE, "could not load commit's tree %s", sha1_to_hex(tree_sha1)); | |
765 | if (err) | |
766 | return err; | |
767 | } | |
6d2d780f JH |
768 | if (memchr(buffer_begin, '\0', size)) { |
769 | err = report(options, &commit->object, FSCK_MSG_NUL_IN_COMMIT, | |
770 | "NUL byte in the commit object body"); | |
771 | if (err) | |
772 | return err; | |
773 | } | |
ba002f3b MK |
774 | return 0; |
775 | } | |
776 | ||
90a398bb | 777 | static int fsck_commit(struct commit *commit, const char *data, |
22410549 | 778 | unsigned long size, struct fsck_options *options) |
bc6b8fc1 | 779 | { |
90a398bb | 780 | const char *buffer = data ? data : get_commit_buffer(commit, &size); |
22410549 | 781 | int ret = fsck_commit_buffer(commit, buffer, size, options); |
90a398bb JS |
782 | if (!data) |
783 | unuse_commit_buffer(commit, buffer); | |
bc6b8fc1 JK |
784 | return ret; |
785 | } | |
786 | ||
cec097be | 787 | static int fsck_tag_buffer(struct tag *tag, const char *data, |
22410549 | 788 | unsigned long size, struct fsck_options *options) |
cec097be JS |
789 | { |
790 | unsigned char sha1[20]; | |
791 | int ret = 0; | |
792 | const char *buffer; | |
793 | char *to_free = NULL, *eol; | |
794 | struct strbuf sb = STRBUF_INIT; | |
795 | ||
796 | if (data) | |
797 | buffer = data; | |
798 | else { | |
799 | enum object_type type; | |
800 | ||
801 | buffer = to_free = | |
ed1c9977 | 802 | read_sha1_file(tag->object.oid.hash, &type, &size); |
cec097be | 803 | if (!buffer) |
c99ba492 JS |
804 | return report(options, &tag->object, |
805 | FSCK_MSG_MISSING_TAG_OBJECT, | |
cec097be JS |
806 | "cannot read tag object"); |
807 | ||
808 | if (type != OBJ_TAG) { | |
c99ba492 JS |
809 | ret = report(options, &tag->object, |
810 | FSCK_MSG_TAG_OBJECT_NOT_TAG, | |
cec097be JS |
811 | "expected tag got %s", |
812 | typename(type)); | |
813 | goto done; | |
814 | } | |
815 | } | |
816 | ||
8a272f29 RS |
817 | ret = verify_headers(buffer, size, &tag->object, options); |
818 | if (ret) | |
cec097be JS |
819 | goto done; |
820 | ||
821 | if (!skip_prefix(buffer, "object ", &buffer)) { | |
c99ba492 | 822 | ret = report(options, &tag->object, FSCK_MSG_MISSING_OBJECT, "invalid format - expected 'object' line"); |
cec097be JS |
823 | goto done; |
824 | } | |
825 | if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') { | |
c99ba492 | 826 | ret = report(options, &tag->object, FSCK_MSG_BAD_OBJECT_SHA1, "invalid 'object' line format - bad sha1"); |
7d7d5b05 JS |
827 | if (ret) |
828 | goto done; | |
cec097be JS |
829 | } |
830 | buffer += 41; | |
831 | ||
832 | if (!skip_prefix(buffer, "type ", &buffer)) { | |
c99ba492 | 833 | ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE_ENTRY, "invalid format - expected 'type' line"); |
cec097be JS |
834 | goto done; |
835 | } | |
836 | eol = strchr(buffer, '\n'); | |
837 | if (!eol) { | |
c99ba492 | 838 | ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE, "invalid format - unexpected end after 'type' line"); |
cec097be JS |
839 | goto done; |
840 | } | |
841 | if (type_from_string_gently(buffer, eol - buffer, 1) < 0) | |
c99ba492 | 842 | ret = report(options, &tag->object, FSCK_MSG_BAD_TYPE, "invalid 'type' value"); |
cec097be JS |
843 | if (ret) |
844 | goto done; | |
845 | buffer = eol + 1; | |
846 | ||
847 | if (!skip_prefix(buffer, "tag ", &buffer)) { | |
c99ba492 | 848 | ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG_ENTRY, "invalid format - expected 'tag' line"); |
cec097be JS |
849 | goto done; |
850 | } | |
851 | eol = strchr(buffer, '\n'); | |
852 | if (!eol) { | |
c99ba492 | 853 | ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG, "invalid format - unexpected end after 'type' line"); |
cec097be JS |
854 | goto done; |
855 | } | |
856 | strbuf_addf(&sb, "refs/tags/%.*s", (int)(eol - buffer), buffer); | |
f27d05b1 JS |
857 | if (check_refname_format(sb.buf, 0)) { |
858 | ret = report(options, &tag->object, FSCK_MSG_BAD_TAG_NAME, | |
c99ba492 | 859 | "invalid 'tag' name: %.*s", |
7add4419 | 860 | (int)(eol - buffer), buffer); |
f27d05b1 JS |
861 | if (ret) |
862 | goto done; | |
863 | } | |
cec097be JS |
864 | buffer = eol + 1; |
865 | ||
f27d05b1 | 866 | if (!skip_prefix(buffer, "tagger ", &buffer)) { |
cec097be | 867 | /* early tags do not contain 'tagger' lines; warn only */ |
f27d05b1 JS |
868 | ret = report(options, &tag->object, FSCK_MSG_MISSING_TAGGER_ENTRY, "invalid format - expected 'tagger' line"); |
869 | if (ret) | |
870 | goto done; | |
871 | } | |
cec097be | 872 | else |
22410549 | 873 | ret = fsck_ident(&buffer, &tag->object, options); |
cec097be JS |
874 | |
875 | done: | |
876 | strbuf_release(&sb); | |
877 | free(to_free); | |
878 | return ret; | |
879 | } | |
880 | ||
90a398bb | 881 | static int fsck_tag(struct tag *tag, const char *data, |
22410549 | 882 | unsigned long size, struct fsck_options *options) |
ba002f3b MK |
883 | { |
884 | struct object *tagged = tag->tagged; | |
885 | ||
886 | if (!tagged) | |
c99ba492 | 887 | return report(options, &tag->object, FSCK_MSG_BAD_TAG_OBJECT, "could not load tagged object"); |
cec097be | 888 | |
22410549 | 889 | return fsck_tag_buffer(tag, data, size, options); |
ba002f3b MK |
890 | } |
891 | ||
90a398bb | 892 | int fsck_object(struct object *obj, void *data, unsigned long size, |
22410549 | 893 | struct fsck_options *options) |
ba002f3b MK |
894 | { |
895 | if (!obj) | |
c99ba492 | 896 | return report(options, obj, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck"); |
ba002f3b MK |
897 | |
898 | if (obj->type == OBJ_BLOB) | |
899 | return 0; | |
900 | if (obj->type == OBJ_TREE) | |
22410549 | 901 | return fsck_tree((struct tree *) obj, options); |
ba002f3b | 902 | if (obj->type == OBJ_COMMIT) |
90a398bb | 903 | return fsck_commit((struct commit *) obj, (const char *) data, |
22410549 | 904 | size, options); |
ba002f3b | 905 | if (obj->type == OBJ_TAG) |
90a398bb | 906 | return fsck_tag((struct tag *) obj, (const char *) data, |
22410549 | 907 | size, options); |
ba002f3b | 908 | |
c99ba492 | 909 | return report(options, obj, FSCK_MSG_UNKNOWN_TYPE, "unknown type '%d' (internal fsck error)", |
ba002f3b MK |
910 | obj->type); |
911 | } | |
d6ffc8d7 | 912 | |
1cd772cc JS |
913 | int fsck_error_function(struct fsck_options *o, |
914 | struct object *obj, int msg_type, const char *message) | |
d6ffc8d7 | 915 | { |
0282f4dc | 916 | if (msg_type == FSCK_WARN) { |
90cf590f | 917 | warning("object %s: %s", describe_object(o, obj), message); |
0282f4dc JS |
918 | return 0; |
919 | } | |
90cf590f | 920 | error("object %s: %s", describe_object(o, obj), message); |
d6ffc8d7 MK |
921 | return 1; |
922 | } |