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Commit | Line | Data |
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355885d5 | 1 | #include "cache.h" |
cbd53a21 | 2 | #include "object-store.h" |
109cd76d | 3 | #include "repository.h" |
355885d5 MK |
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" | |
cec097be | 11 | #include "refs.h" |
a2b26ffb | 12 | #include "url.h" |
a18fcc9f | 13 | #include "utf8.h" |
7b35efd7 | 14 | #include "decorate.h" |
159e7b08 | 15 | #include "oidset.h" |
27387444 | 16 | #include "packfile.h" |
ed8b10f6 JK |
17 | #include "submodule-config.h" |
18 | #include "config.h" | |
07259e74 | 19 | #include "credential.h" |
3ac68a93 | 20 | #include "help.h" |
159e7b08 | 21 | |
f417eed8 | 22 | #define STR(x) #x |
a4a9cc19 | 23 | #define MSG_ID(id, msg_type) { STR(id), NULL, NULL, FSCK_##msg_type }, |
c99ba492 | 24 | static struct { |
f417eed8 JS |
25 | const char *id_string; |
26 | const char *downcased; | |
a4a9cc19 | 27 | const char *camelcased; |
1b32b59f | 28 | enum fsck_msg_type msg_type; |
c99ba492 | 29 | } msg_id_info[FSCK_MSG_MAX + 1] = { |
901f2f67 | 30 | FOREACH_FSCK_MSG_ID(MSG_ID) |
a4a9cc19 | 31 | { NULL, NULL, NULL, -1 } |
c99ba492 JS |
32 | }; |
33 | #undef MSG_ID | |
b5495024 | 34 | #undef STR |
c99ba492 | 35 | |
a46baac6 | 36 | static void prepare_msg_ids(void) |
f417eed8 JS |
37 | { |
38 | int i; | |
39 | ||
a46baac6 NTND |
40 | if (msg_id_info[0].downcased) |
41 | return; | |
42 | ||
43 | /* convert id_string to lower case, without underscores. */ | |
44 | for (i = 0; i < FSCK_MSG_MAX; i++) { | |
45 | const char *p = msg_id_info[i].id_string; | |
46 | int len = strlen(p); | |
47 | char *q = xmalloc(len); | |
48 | ||
49 | msg_id_info[i].downcased = q; | |
50 | while (*p) | |
51 | if (*p == '_') | |
52 | p++; | |
53 | else | |
54 | *(q)++ = tolower(*(p)++); | |
55 | *q = '\0'; | |
a4a9cc19 NTND |
56 | |
57 | p = msg_id_info[i].id_string; | |
58 | q = xmalloc(len); | |
59 | msg_id_info[i].camelcased = q; | |
60 | while (*p) { | |
61 | if (*p == '_') { | |
62 | p++; | |
63 | if (*p) | |
64 | *q++ = *p++; | |
65 | } else { | |
66 | *q++ = tolower(*p++); | |
67 | } | |
f417eed8 | 68 | } |
a4a9cc19 | 69 | *q = '\0'; |
f417eed8 | 70 | } |
a46baac6 NTND |
71 | } |
72 | ||
73 | static int parse_msg_id(const char *text) | |
74 | { | |
75 | int i; | |
76 | ||
77 | prepare_msg_ids(); | |
f417eed8 JS |
78 | |
79 | for (i = 0; i < FSCK_MSG_MAX; i++) | |
80 | if (!strcmp(text, msg_id_info[i].downcased)) | |
81 | return i; | |
82 | ||
83 | return -1; | |
84 | } | |
85 | ||
3ac68a93 NTND |
86 | void list_config_fsck_msg_ids(struct string_list *list, const char *prefix) |
87 | { | |
88 | int i; | |
89 | ||
90 | prepare_msg_ids(); | |
91 | ||
3ac68a93 | 92 | for (i = 0; i < FSCK_MSG_MAX; i++) |
a4a9cc19 | 93 | list_config_item(list, prefix, msg_id_info[i].camelcased); |
3ac68a93 NTND |
94 | } |
95 | ||
1b32b59f | 96 | static enum fsck_msg_type fsck_msg_type(enum fsck_msg_id msg_id, |
c99ba492 JS |
97 | struct fsck_options *options) |
98 | { | |
0282f4dc JS |
99 | assert(msg_id >= 0 && msg_id < FSCK_MSG_MAX); |
100 | ||
e35d65a7 | 101 | if (!options->msg_type) { |
1b32b59f | 102 | enum fsck_msg_type msg_type = msg_id_info[msg_id].msg_type; |
e35d65a7 | 103 | |
0282f4dc JS |
104 | if (options->strict && msg_type == FSCK_WARN) |
105 | msg_type = FSCK_ERROR; | |
e35d65a7 | 106 | return msg_type; |
0282f4dc | 107 | } |
c99ba492 | 108 | |
e35d65a7 | 109 | return options->msg_type[msg_id]; |
c99ba492 JS |
110 | } |
111 | ||
1b32b59f | 112 | static enum fsck_msg_type parse_msg_type(const char *str) |
0282f4dc JS |
113 | { |
114 | if (!strcmp(str, "error")) | |
115 | return FSCK_ERROR; | |
116 | else if (!strcmp(str, "warn")) | |
117 | return FSCK_WARN; | |
efaba7cc JS |
118 | else if (!strcmp(str, "ignore")) |
119 | return FSCK_IGNORE; | |
0282f4dc JS |
120 | else |
121 | die("Unknown fsck message type: '%s'", str); | |
122 | } | |
123 | ||
5d477a33 JS |
124 | int is_valid_msg_type(const char *msg_id, const char *msg_type) |
125 | { | |
126 | if (parse_msg_id(msg_id) < 0) | |
127 | return 0; | |
128 | parse_msg_type(msg_type); | |
129 | return 1; | |
130 | } | |
131 | ||
53692df2 ÆAB |
132 | void fsck_set_msg_type_from_ids(struct fsck_options *options, |
133 | enum fsck_msg_id msg_id, | |
134 | enum fsck_msg_type msg_type) | |
135 | { | |
136 | if (!options->msg_type) { | |
137 | int i; | |
138 | enum fsck_msg_type *severity; | |
139 | ALLOC_ARRAY(severity, FSCK_MSG_MAX); | |
140 | for (i = 0; i < FSCK_MSG_MAX; i++) | |
141 | severity[i] = fsck_msg_type(i, options); | |
142 | options->msg_type = severity; | |
143 | } | |
144 | ||
145 | options->msg_type[msg_id] = msg_type; | |
146 | } | |
147 | ||
0282f4dc | 148 | void fsck_set_msg_type(struct fsck_options *options, |
f1abc2d0 | 149 | const char *msg_id_str, const char *msg_type_str) |
0282f4dc | 150 | { |
1b32b59f | 151 | int msg_id = parse_msg_id(msg_id_str); |
c72da1a2 | 152 | enum fsck_msg_type msg_type = parse_msg_type(msg_type_str); |
0282f4dc | 153 | |
f1abc2d0 ÆAB |
154 | if (msg_id < 0) |
155 | die("Unhandled message id: %s", msg_id_str); | |
0282f4dc | 156 | |
f1abc2d0 ÆAB |
157 | if (msg_type != FSCK_ERROR && msg_id_info[msg_id].msg_type == FSCK_FATAL) |
158 | die("Cannot demote %s to %s", msg_id_str, msg_type_str); | |
f50c4407 | 159 | |
53692df2 | 160 | fsck_set_msg_type_from_ids(options, msg_id, msg_type); |
0282f4dc JS |
161 | } |
162 | ||
163 | void fsck_set_msg_types(struct fsck_options *options, const char *values) | |
164 | { | |
165 | char *buf = xstrdup(values), *to_free = buf; | |
166 | int done = 0; | |
167 | ||
168 | while (!done) { | |
169 | int len = strcspn(buf, " ,|"), equal; | |
170 | ||
171 | done = !buf[len]; | |
172 | if (!len) { | |
173 | buf++; | |
174 | continue; | |
175 | } | |
176 | buf[len] = '\0'; | |
177 | ||
178 | for (equal = 0; | |
179 | equal < len && buf[equal] != '=' && buf[equal] != ':'; | |
180 | equal++) | |
181 | buf[equal] = tolower(buf[equal]); | |
182 | buf[equal] = '\0'; | |
183 | ||
cd94c6f9 JS |
184 | if (!strcmp(buf, "skiplist")) { |
185 | if (equal == len) | |
186 | die("skiplist requires a path"); | |
24eb33eb | 187 | oidset_parse_file(&options->skiplist, buf + equal + 1); |
cd94c6f9 JS |
188 | buf += len + 1; |
189 | continue; | |
190 | } | |
191 | ||
0282f4dc JS |
192 | if (equal == len) |
193 | die("Missing '=': '%s'", buf); | |
355885d5 | 194 | |
0282f4dc JS |
195 | fsck_set_msg_type(options, buf, buf + equal + 1); |
196 | buf += len + 1; | |
197 | } | |
198 | free(to_free); | |
199 | } | |
200 | ||
f5979376 JK |
201 | static int object_on_skiplist(struct fsck_options *opts, |
202 | const struct object_id *oid) | |
fb162877 | 203 | { |
f5979376 | 204 | return opts && oid && oidset_contains(&opts->skiplist, oid); |
fb162877 RJ |
205 | } |
206 | ||
38370253 JK |
207 | __attribute__((format (printf, 5, 6))) |
208 | static int report(struct fsck_options *options, | |
209 | const struct object_id *oid, enum object_type object_type, | |
35af754b | 210 | enum fsck_msg_id msg_id, const char *fmt, ...) |
c99ba492 JS |
211 | { |
212 | va_list ap; | |
213 | struct strbuf sb = STRBUF_INIT; | |
1b32b59f ÆAB |
214 | enum fsck_msg_type msg_type = fsck_msg_type(msg_id, options); |
215 | int result; | |
c99ba492 | 216 | |
efaba7cc JS |
217 | if (msg_type == FSCK_IGNORE) |
218 | return 0; | |
219 | ||
38370253 | 220 | if (object_on_skiplist(options, oid)) |
cd94c6f9 JS |
221 | return 0; |
222 | ||
f50c4407 JS |
223 | if (msg_type == FSCK_FATAL) |
224 | msg_type = FSCK_ERROR; | |
f27d05b1 JS |
225 | else if (msg_type == FSCK_INFO) |
226 | msg_type = FSCK_WARN; | |
f50c4407 | 227 | |
034a7b7b | 228 | prepare_msg_ids(); |
35af754b | 229 | strbuf_addf(&sb, "%s: ", msg_id_info[msg_id].camelcased); |
71ab8fa8 | 230 | |
c99ba492 JS |
231 | va_start(ap, fmt); |
232 | strbuf_vaddf(&sb, fmt, ap); | |
38370253 | 233 | result = options->error_func(options, oid, object_type, |
394d5d31 | 234 | msg_type, msg_id, sb.buf); |
c99ba492 JS |
235 | strbuf_release(&sb); |
236 | va_end(ap); | |
237 | ||
238 | return result; | |
239 | } | |
240 | ||
a59cfb32 JK |
241 | void fsck_enable_object_names(struct fsck_options *options) |
242 | { | |
243 | if (!options->object_names) | |
73390290 | 244 | options->object_names = kh_init_oid_map(); |
a59cfb32 JK |
245 | } |
246 | ||
73390290 JK |
247 | const char *fsck_get_object_name(struct fsck_options *options, |
248 | const struct object_id *oid) | |
7b35efd7 | 249 | { |
73390290 | 250 | khiter_t pos; |
7b35efd7 JS |
251 | if (!options->object_names) |
252 | return NULL; | |
73390290 JK |
253 | pos = kh_get_oid_map(options->object_names, *oid); |
254 | if (pos >= kh_end(options->object_names)) | |
255 | return NULL; | |
256 | return kh_value(options->object_names, pos); | |
7b35efd7 JS |
257 | } |
258 | ||
73390290 JK |
259 | void fsck_put_object_name(struct fsck_options *options, |
260 | const struct object_id *oid, | |
a59cfb32 | 261 | const char *fmt, ...) |
7b35efd7 JS |
262 | { |
263 | va_list ap; | |
264 | struct strbuf buf = STRBUF_INIT; | |
73390290 JK |
265 | khiter_t pos; |
266 | int hashret; | |
7b35efd7 JS |
267 | |
268 | if (!options->object_names) | |
269 | return; | |
73390290 JK |
270 | |
271 | pos = kh_put_oid_map(options->object_names, *oid, &hashret); | |
272 | if (!hashret) | |
7b35efd7 JS |
273 | return; |
274 | va_start(ap, fmt); | |
275 | strbuf_vaddf(&buf, fmt, ap); | |
73390290 | 276 | kh_value(options->object_names, pos) = strbuf_detach(&buf, NULL); |
7b35efd7 JS |
277 | va_end(ap); |
278 | } | |
279 | ||
a59cfb32 | 280 | const char *fsck_describe_object(struct fsck_options *options, |
73390290 | 281 | const struct object_id *oid) |
90cf590f | 282 | { |
a59cfb32 JK |
283 | static struct strbuf bufs[] = { |
284 | STRBUF_INIT, STRBUF_INIT, STRBUF_INIT, STRBUF_INIT | |
285 | }; | |
286 | static int b = 0; | |
287 | struct strbuf *buf; | |
73390290 | 288 | const char *name = fsck_get_object_name(options, oid); |
a59cfb32 JK |
289 | |
290 | buf = bufs + b; | |
291 | b = (b + 1) % ARRAY_SIZE(bufs); | |
292 | strbuf_reset(buf); | |
73390290 | 293 | strbuf_addstr(buf, oid_to_hex(oid)); |
a59cfb32 JK |
294 | if (name) |
295 | strbuf_addf(buf, " (%s)", name); | |
90cf590f | 296 | |
a59cfb32 | 297 | return buf->buf; |
90cf590f JS |
298 | } |
299 | ||
22410549 | 300 | static int fsck_walk_tree(struct tree *tree, void *data, struct fsck_options *options) |
355885d5 MK |
301 | { |
302 | struct tree_desc desc; | |
303 | struct name_entry entry; | |
304 | int res = 0; | |
7b35efd7 | 305 | const char *name; |
355885d5 MK |
306 | |
307 | if (parse_tree(tree)) | |
308 | return -1; | |
309 | ||
73390290 | 310 | name = fsck_get_object_name(options, &tree->object.oid); |
8354fa3d DT |
311 | if (init_tree_desc_gently(&desc, tree->buffer, tree->size)) |
312 | return -1; | |
313 | while (tree_entry_gently(&desc, &entry)) { | |
7b35efd7 | 314 | struct object *obj; |
355885d5 MK |
315 | int result; |
316 | ||
317 | if (S_ISGITLINK(entry.mode)) | |
318 | continue; | |
7b35efd7 JS |
319 | |
320 | if (S_ISDIR(entry.mode)) { | |
ea82b2a0 | 321 | obj = (struct object *)lookup_tree(the_repository, &entry.oid); |
2720f6db | 322 | if (name && obj) |
73390290 | 323 | fsck_put_object_name(options, &entry.oid, "%s%s/", |
a59cfb32 | 324 | name, entry.path); |
7b35efd7 JS |
325 | result = options->walk(obj, OBJ_TREE, data, options); |
326 | } | |
327 | else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode)) { | |
ea82b2a0 | 328 | obj = (struct object *)lookup_blob(the_repository, &entry.oid); |
2720f6db | 329 | if (name && obj) |
73390290 | 330 | fsck_put_object_name(options, &entry.oid, "%s%s", |
a59cfb32 | 331 | name, entry.path); |
7b35efd7 JS |
332 | result = options->walk(obj, OBJ_BLOB, data, options); |
333 | } | |
355885d5 | 334 | else { |
82247e9b | 335 | result = error("in tree %s: entry %s has bad mode %.6o", |
73390290 | 336 | fsck_describe_object(options, &tree->object.oid), |
a59cfb32 | 337 | entry.path, entry.mode); |
355885d5 MK |
338 | } |
339 | if (result < 0) | |
340 | return result; | |
341 | if (!res) | |
342 | res = result; | |
343 | } | |
344 | return res; | |
345 | } | |
346 | ||
22410549 | 347 | static int fsck_walk_commit(struct commit *commit, void *data, struct fsck_options *options) |
355885d5 | 348 | { |
7b35efd7 | 349 | int counter = 0, generation = 0, name_prefix_len = 0; |
355885d5 MK |
350 | struct commit_list *parents; |
351 | int res; | |
352 | int result; | |
7b35efd7 | 353 | const char *name; |
355885d5 MK |
354 | |
355 | if (parse_commit(commit)) | |
356 | return -1; | |
357 | ||
73390290 | 358 | name = fsck_get_object_name(options, &commit->object.oid); |
7b35efd7 | 359 | if (name) |
73390290 | 360 | fsck_put_object_name(options, get_commit_tree_oid(commit), |
a59cfb32 | 361 | "%s:", name); |
7b35efd7 | 362 | |
2e27bd77 DS |
363 | result = options->walk((struct object *)get_commit_tree(commit), |
364 | OBJ_TREE, data, options); | |
355885d5 MK |
365 | if (result < 0) |
366 | return result; | |
367 | res = result; | |
368 | ||
369 | parents = commit->parents; | |
7b35efd7 JS |
370 | if (name && parents) { |
371 | int len = strlen(name), power; | |
372 | ||
373 | if (len && name[len - 1] == '^') { | |
374 | generation = 1; | |
375 | name_prefix_len = len - 1; | |
376 | } | |
377 | else { /* parse ~<generation> suffix */ | |
378 | for (generation = 0, power = 1; | |
379 | len && isdigit(name[len - 1]); | |
380 | power *= 10) | |
381 | generation += power * (name[--len] - '0'); | |
382 | if (power > 1 && len && name[len - 1] == '~') | |
383 | name_prefix_len = len - 1; | |
e89f8936 JS |
384 | else { |
385 | /* Maybe a non-first parent, e.g. HEAD^2 */ | |
386 | generation = 0; | |
387 | name_prefix_len = len; | |
388 | } | |
7b35efd7 JS |
389 | } |
390 | } | |
391 | ||
355885d5 | 392 | while (parents) { |
7b35efd7 | 393 | if (name) { |
73390290 | 394 | struct object_id *oid = &parents->item->object.oid; |
7b35efd7 | 395 | |
b84c7838 | 396 | if (counter++) |
73390290 | 397 | fsck_put_object_name(options, oid, "%s^%d", |
a59cfb32 | 398 | name, counter); |
7b35efd7 | 399 | else if (generation > 0) |
73390290 | 400 | fsck_put_object_name(options, oid, "%.*s~%d", |
a59cfb32 JK |
401 | name_prefix_len, name, |
402 | generation + 1); | |
7b35efd7 | 403 | else |
73390290 | 404 | fsck_put_object_name(options, oid, "%s^", name); |
7b35efd7 | 405 | } |
22410549 | 406 | result = options->walk((struct object *)parents->item, OBJ_COMMIT, data, options); |
355885d5 MK |
407 | if (result < 0) |
408 | return result; | |
409 | if (!res) | |
410 | res = result; | |
411 | parents = parents->next; | |
412 | } | |
413 | return res; | |
414 | } | |
415 | ||
22410549 | 416 | static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *options) |
355885d5 | 417 | { |
73390290 | 418 | const char *name = fsck_get_object_name(options, &tag->object.oid); |
7b35efd7 | 419 | |
355885d5 MK |
420 | if (parse_tag(tag)) |
421 | return -1; | |
7b35efd7 | 422 | if (name) |
73390290 | 423 | fsck_put_object_name(options, &tag->tagged->oid, "%s", name); |
22410549 | 424 | return options->walk(tag->tagged, OBJ_ANY, data, options); |
355885d5 MK |
425 | } |
426 | ||
22410549 | 427 | int fsck_walk(struct object *obj, void *data, struct fsck_options *options) |
355885d5 MK |
428 | { |
429 | if (!obj) | |
430 | return -1; | |
a2b22854 JK |
431 | |
432 | if (obj->type == OBJ_NONE) | |
109cd76d | 433 | parse_object(the_repository, &obj->oid); |
a2b22854 | 434 | |
355885d5 MK |
435 | switch (obj->type) { |
436 | case OBJ_BLOB: | |
437 | return 0; | |
438 | case OBJ_TREE: | |
22410549 | 439 | return fsck_walk_tree((struct tree *)obj, data, options); |
355885d5 | 440 | case OBJ_COMMIT: |
22410549 | 441 | return fsck_walk_commit((struct commit *)obj, data, options); |
355885d5 | 442 | case OBJ_TAG: |
22410549 | 443 | return fsck_walk_tag((struct tag *)obj, data, options); |
355885d5 | 444 | default: |
a59cfb32 | 445 | error("Unknown object type for %s", |
73390290 | 446 | fsck_describe_object(options, &obj->oid)); |
355885d5 MK |
447 | return -1; |
448 | } | |
449 | } | |
ba002f3b | 450 | |
9068cfb2 RS |
451 | struct name_stack { |
452 | const char **names; | |
453 | size_t nr, alloc; | |
454 | }; | |
455 | ||
456 | static void name_stack_push(struct name_stack *stack, const char *name) | |
457 | { | |
458 | ALLOC_GROW(stack->names, stack->nr + 1, stack->alloc); | |
459 | stack->names[stack->nr++] = name; | |
460 | } | |
461 | ||
462 | static const char *name_stack_pop(struct name_stack *stack) | |
463 | { | |
464 | return stack->nr ? stack->names[--stack->nr] : NULL; | |
465 | } | |
466 | ||
467 | static void name_stack_clear(struct name_stack *stack) | |
468 | { | |
469 | FREE_AND_NULL(stack->names); | |
470 | stack->nr = stack->alloc = 0; | |
471 | } | |
472 | ||
ba002f3b MK |
473 | /* |
474 | * The entries in a tree are ordered in the _path_ order, | |
475 | * which means that a directory entry is ordered by adding | |
476 | * a slash to the end of it. | |
477 | * | |
478 | * So a directory called "a" is ordered _after_ a file | |
479 | * called "a.c", because "a/" sorts after "a.c". | |
480 | */ | |
481 | #define TREE_UNORDERED (-1) | |
482 | #define TREE_HAS_DUPS (-2) | |
483 | ||
9068cfb2 RS |
484 | static int is_less_than_slash(unsigned char c) |
485 | { | |
486 | return '\0' < c && c < '/'; | |
487 | } | |
488 | ||
489 | static int verify_ordered(unsigned mode1, const char *name1, | |
490 | unsigned mode2, const char *name2, | |
491 | struct name_stack *candidates) | |
ba002f3b MK |
492 | { |
493 | int len1 = strlen(name1); | |
494 | int len2 = strlen(name2); | |
495 | int len = len1 < len2 ? len1 : len2; | |
496 | unsigned char c1, c2; | |
497 | int cmp; | |
498 | ||
499 | cmp = memcmp(name1, name2, len); | |
500 | if (cmp < 0) | |
501 | return 0; | |
502 | if (cmp > 0) | |
503 | return TREE_UNORDERED; | |
504 | ||
505 | /* | |
506 | * Ok, the first <len> characters are the same. | |
507 | * Now we need to order the next one, but turn | |
508 | * a '\0' into a '/' for a directory entry. | |
509 | */ | |
510 | c1 = name1[len]; | |
511 | c2 = name2[len]; | |
512 | if (!c1 && !c2) | |
513 | /* | |
514 | * git-write-tree used to write out a nonsense tree that has | |
515 | * entries with the same name, one blob and one tree. Make | |
516 | * sure we do not have duplicate entries. | |
517 | */ | |
518 | return TREE_HAS_DUPS; | |
519 | if (!c1 && S_ISDIR(mode1)) | |
520 | c1 = '/'; | |
521 | if (!c2 && S_ISDIR(mode2)) | |
522 | c2 = '/'; | |
9068cfb2 RS |
523 | |
524 | /* | |
525 | * There can be non-consecutive duplicates due to the implicitly | |
86715592 | 526 | * added slash, e.g.: |
9068cfb2 RS |
527 | * |
528 | * foo | |
529 | * foo.bar | |
530 | * foo.bar.baz | |
531 | * foo.bar/ | |
532 | * foo/ | |
533 | * | |
534 | * Record non-directory candidates (like "foo" and "foo.bar" in | |
535 | * the example) on a stack and check directory candidates (like | |
536 | * foo/" and "foo.bar/") against that stack. | |
537 | */ | |
538 | if (!c1 && is_less_than_slash(c2)) { | |
539 | name_stack_push(candidates, name1); | |
540 | } else if (c2 == '/' && is_less_than_slash(c1)) { | |
541 | for (;;) { | |
542 | const char *p; | |
543 | const char *f_name = name_stack_pop(candidates); | |
544 | ||
545 | if (!f_name) | |
546 | break; | |
547 | if (!skip_prefix(name2, f_name, &p)) | |
fe747043 | 548 | continue; |
9068cfb2 RS |
549 | if (!*p) |
550 | return TREE_HAS_DUPS; | |
551 | if (is_less_than_slash(*p)) { | |
552 | name_stack_push(candidates, f_name); | |
553 | break; | |
554 | } | |
555 | } | |
556 | } | |
557 | ||
ba002f3b MK |
558 | return c1 < c2 ? 0 : TREE_UNORDERED; |
559 | } | |
560 | ||
9e1947cb | 561 | static int fsck_tree(const struct object_id *tree_oid, |
23a173a7 JK |
562 | const char *buffer, unsigned long size, |
563 | struct fsck_options *options) | |
ba002f3b | 564 | { |
8354fa3d | 565 | int retval = 0; |
c479d14a | 566 | int has_null_sha1 = 0; |
ba002f3b MK |
567 | int has_full_path = 0; |
568 | int has_empty_name = 0; | |
5d34a435 JK |
569 | int has_dot = 0; |
570 | int has_dotdot = 0; | |
5c17f512 | 571 | int has_dotgit = 0; |
ba002f3b MK |
572 | int has_zero_pad = 0; |
573 | int has_bad_modes = 0; | |
574 | int has_dup_entries = 0; | |
575 | int not_properly_sorted = 0; | |
576 | struct tree_desc desc; | |
577 | unsigned o_mode; | |
578 | const char *o_name; | |
9068cfb2 | 579 | struct name_stack df_dup_candidates = { NULL }; |
ba002f3b | 580 | |
23a173a7 | 581 | if (init_tree_desc_gently(&desc, buffer, size)) { |
0282f679 JK |
582 | retval += report(options, tree_oid, OBJ_TREE, |
583 | FSCK_MSG_BAD_TREE, | |
584 | "cannot be parsed as a tree"); | |
8354fa3d DT |
585 | return retval; |
586 | } | |
ba002f3b MK |
587 | |
588 | o_mode = 0; | |
589 | o_name = NULL; | |
ba002f3b MK |
590 | |
591 | while (desc.size) { | |
5ec1e728 | 592 | unsigned short mode; |
288a74bc | 593 | const char *name, *backslash; |
9e1947cb | 594 | const struct object_id *entry_oid; |
ba002f3b | 595 | |
9e1947cb | 596 | entry_oid = tree_entry_extract(&desc, &name, &mode); |
ba002f3b | 597 | |
9e1947cb | 598 | has_null_sha1 |= is_null_oid(entry_oid); |
effd12ec HS |
599 | has_full_path |= !!strchr(name, '/'); |
600 | has_empty_name |= !*name; | |
601 | has_dot |= !strcmp(name, "."); | |
602 | has_dotdot |= !strcmp(name, ".."); | |
ed9c3220 | 603 | has_dotgit |= is_hfs_dotgit(name) || is_ntfs_dotgit(name); |
ba002f3b | 604 | has_zero_pad |= *(char *)desc.buffer == '0'; |
159e7b08 | 605 | |
b7b1fca1 JK |
606 | if (is_hfs_dotgitmodules(name) || is_ntfs_dotgitmodules(name)) { |
607 | if (!S_ISLNK(mode)) | |
9e1947cb JK |
608 | oidset_insert(&options->gitmodules_found, |
609 | entry_oid); | |
b7b1fca1 | 610 | else |
38370253 | 611 | retval += report(options, |
9e1947cb | 612 | tree_oid, OBJ_TREE, |
b7b1fca1 JK |
613 | FSCK_MSG_GITMODULES_SYMLINK, |
614 | ".gitmodules is a symbolic link"); | |
615 | } | |
159e7b08 | 616 | |
bb6832d5 JK |
617 | if (S_ISLNK(mode)) { |
618 | if (is_hfs_dotgitignore(name) || | |
619 | is_ntfs_dotgitignore(name)) | |
620 | retval += report(options, tree_oid, OBJ_TREE, | |
621 | FSCK_MSG_GITIGNORE_SYMLINK, | |
622 | ".gitignore is a symlink"); | |
623 | if (is_hfs_dotgitattributes(name) || | |
624 | is_ntfs_dotgitattributes(name)) | |
625 | retval += report(options, tree_oid, OBJ_TREE, | |
626 | FSCK_MSG_GITATTRIBUTES_SYMLINK, | |
627 | ".gitattributes is a symlink"); | |
628 | if (is_hfs_dotmailmap(name) || | |
629 | is_ntfs_dotmailmap(name)) | |
630 | retval += report(options, tree_oid, OBJ_TREE, | |
631 | FSCK_MSG_MAILMAP_SYMLINK, | |
632 | ".mailmap is a symlink"); | |
633 | } | |
634 | ||
288a74bc JS |
635 | if ((backslash = strchr(name, '\\'))) { |
636 | while (backslash) { | |
637 | backslash++; | |
638 | has_dotgit |= is_ntfs_dotgit(backslash); | |
bdfef049 JS |
639 | if (is_ntfs_dotgitmodules(backslash)) { |
640 | if (!S_ISLNK(mode)) | |
9e1947cb JK |
641 | oidset_insert(&options->gitmodules_found, |
642 | entry_oid); | |
bdfef049 | 643 | else |
9e1947cb | 644 | retval += report(options, tree_oid, OBJ_TREE, |
bdfef049 JS |
645 | FSCK_MSG_GITMODULES_SYMLINK, |
646 | ".gitmodules is a symbolic link"); | |
647 | } | |
288a74bc JS |
648 | backslash = strchr(backslash, '\\'); |
649 | } | |
650 | } | |
651 | ||
8354fa3d | 652 | if (update_tree_entry_gently(&desc)) { |
0282f679 JK |
653 | retval += report(options, tree_oid, OBJ_TREE, |
654 | FSCK_MSG_BAD_TREE, | |
655 | "cannot be parsed as a tree"); | |
8354fa3d DT |
656 | break; |
657 | } | |
ba002f3b MK |
658 | |
659 | switch (mode) { | |
660 | /* | |
661 | * Standard modes.. | |
662 | */ | |
663 | case S_IFREG | 0755: | |
664 | case S_IFREG | 0644: | |
665 | case S_IFLNK: | |
666 | case S_IFDIR: | |
667 | case S_IFGITLINK: | |
668 | break; | |
669 | /* | |
670 | * This is nonstandard, but we had a few of these | |
671 | * early on when we honored the full set of mode | |
672 | * bits.. | |
673 | */ | |
674 | case S_IFREG | 0664: | |
22410549 | 675 | if (!options->strict) |
ba002f3b | 676 | break; |
1cf01a34 | 677 | /* fallthrough */ |
ba002f3b MK |
678 | default: |
679 | has_bad_modes = 1; | |
680 | } | |
681 | ||
682 | if (o_name) { | |
9068cfb2 RS |
683 | switch (verify_ordered(o_mode, o_name, mode, name, |
684 | &df_dup_candidates)) { | |
ba002f3b MK |
685 | case TREE_UNORDERED: |
686 | not_properly_sorted = 1; | |
687 | break; | |
688 | case TREE_HAS_DUPS: | |
689 | has_dup_entries = 1; | |
690 | break; | |
691 | default: | |
692 | break; | |
693 | } | |
694 | } | |
695 | ||
696 | o_mode = mode; | |
697 | o_name = name; | |
ba002f3b MK |
698 | } |
699 | ||
9068cfb2 RS |
700 | name_stack_clear(&df_dup_candidates); |
701 | ||
c479d14a | 702 | if (has_null_sha1) |
0282f679 JK |
703 | retval += report(options, tree_oid, OBJ_TREE, |
704 | FSCK_MSG_NULL_SHA1, | |
705 | "contains entries pointing to null sha1"); | |
ba002f3b | 706 | if (has_full_path) |
0282f679 JK |
707 | retval += report(options, tree_oid, OBJ_TREE, |
708 | FSCK_MSG_FULL_PATHNAME, | |
709 | "contains full pathnames"); | |
ba002f3b | 710 | if (has_empty_name) |
0282f679 JK |
711 | retval += report(options, tree_oid, OBJ_TREE, |
712 | FSCK_MSG_EMPTY_NAME, | |
713 | "contains empty pathname"); | |
5d34a435 | 714 | if (has_dot) |
0282f679 JK |
715 | retval += report(options, tree_oid, OBJ_TREE, |
716 | FSCK_MSG_HAS_DOT, | |
717 | "contains '.'"); | |
5d34a435 | 718 | if (has_dotdot) |
0282f679 JK |
719 | retval += report(options, tree_oid, OBJ_TREE, |
720 | FSCK_MSG_HAS_DOTDOT, | |
721 | "contains '..'"); | |
5c17f512 | 722 | if (has_dotgit) |
0282f679 JK |
723 | retval += report(options, tree_oid, OBJ_TREE, |
724 | FSCK_MSG_HAS_DOTGIT, | |
725 | "contains '.git'"); | |
ba002f3b | 726 | if (has_zero_pad) |
0282f679 JK |
727 | retval += report(options, tree_oid, OBJ_TREE, |
728 | FSCK_MSG_ZERO_PADDED_FILEMODE, | |
729 | "contains zero-padded file modes"); | |
ba002f3b | 730 | if (has_bad_modes) |
0282f679 JK |
731 | retval += report(options, tree_oid, OBJ_TREE, |
732 | FSCK_MSG_BAD_FILEMODE, | |
733 | "contains bad file modes"); | |
ba002f3b | 734 | if (has_dup_entries) |
0282f679 JK |
735 | retval += report(options, tree_oid, OBJ_TREE, |
736 | FSCK_MSG_DUPLICATE_ENTRIES, | |
737 | "contains duplicate file entries"); | |
ba002f3b | 738 | if (not_properly_sorted) |
0282f679 JK |
739 | retval += report(options, tree_oid, OBJ_TREE, |
740 | FSCK_MSG_TREE_NOT_SORTED, | |
741 | "not properly sorted"); | |
ba002f3b MK |
742 | return retval; |
743 | } | |
744 | ||
84d18c0b | 745 | static int verify_headers(const void *data, unsigned long size, |
cc579000 JK |
746 | const struct object_id *oid, enum object_type type, |
747 | struct fsck_options *options) | |
4d0d8975 JS |
748 | { |
749 | const char *buffer = (const char *)data; | |
750 | unsigned long i; | |
751 | ||
752 | for (i = 0; i < size; i++) { | |
753 | switch (buffer[i]) { | |
754 | case '\0': | |
cc579000 | 755 | return report(options, oid, type, |
c99ba492 JS |
756 | FSCK_MSG_NUL_IN_HEADER, |
757 | "unterminated header: NUL at offset %ld", i); | |
4d0d8975 JS |
758 | case '\n': |
759 | if (i + 1 < size && buffer[i + 1] == '\n') | |
760 | return 0; | |
761 | } | |
762 | } | |
763 | ||
84d18c0b JH |
764 | /* |
765 | * We did not find double-LF that separates the header | |
766 | * and the body. Not having a body is not a crime but | |
767 | * we do want to see the terminating LF for the last header | |
768 | * line. | |
769 | */ | |
770 | if (size && buffer[size - 1] == '\n') | |
771 | return 0; | |
772 | ||
cc579000 | 773 | return report(options, oid, type, |
c99ba492 | 774 | FSCK_MSG_UNTERMINATED_HEADER, "unterminated header"); |
4d0d8975 JS |
775 | } |
776 | ||
78543993 JK |
777 | static int fsck_ident(const char **ident, |
778 | const struct object_id *oid, enum object_type type, | |
779 | struct fsck_options *options) | |
daae1922 | 780 | { |
e6826e33 | 781 | const char *p = *ident; |
d4b8de04 JK |
782 | char *end; |
783 | ||
e6826e33 JS |
784 | *ident = strchrnul(*ident, '\n'); |
785 | if (**ident == '\n') | |
786 | (*ident)++; | |
787 | ||
788 | if (*p == '<') | |
78543993 | 789 | return report(options, oid, type, FSCK_MSG_MISSING_NAME_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); |
e6826e33 JS |
790 | p += strcspn(p, "<>\n"); |
791 | if (*p == '>') | |
78543993 | 792 | return report(options, oid, type, FSCK_MSG_BAD_NAME, "invalid author/committer line - bad name"); |
e6826e33 | 793 | if (*p != '<') |
78543993 | 794 | return report(options, oid, type, FSCK_MSG_MISSING_EMAIL, "invalid author/committer line - missing email"); |
e6826e33 | 795 | if (p[-1] != ' ') |
78543993 | 796 | return report(options, oid, type, FSCK_MSG_MISSING_SPACE_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); |
e6826e33 JS |
797 | p++; |
798 | p += strcspn(p, "<>\n"); | |
799 | if (*p != '>') | |
78543993 | 800 | return report(options, oid, type, FSCK_MSG_BAD_EMAIL, "invalid author/committer line - bad email"); |
e6826e33 JS |
801 | p++; |
802 | if (*p != ' ') | |
78543993 | 803 | return report(options, oid, type, FSCK_MSG_MISSING_SPACE_BEFORE_DATE, "invalid author/committer line - missing space before date"); |
e6826e33 JS |
804 | p++; |
805 | if (*p == '0' && p[1] != ' ') | |
78543993 | 806 | return report(options, oid, type, FSCK_MSG_ZERO_PADDED_DATE, "invalid author/committer line - zero-padded date"); |
1aeb7e75 | 807 | if (date_overflows(parse_timestamp(p, &end, 10))) |
78543993 | 808 | return report(options, oid, type, FSCK_MSG_BAD_DATE_OVERFLOW, "invalid author/committer line - date causes integer overflow"); |
e6826e33 | 809 | if ((end == p || *end != ' ')) |
78543993 | 810 | return report(options, oid, type, FSCK_MSG_BAD_DATE, "invalid author/committer line - bad date"); |
e6826e33 JS |
811 | p = end + 1; |
812 | if ((*p != '+' && *p != '-') || | |
813 | !isdigit(p[1]) || | |
814 | !isdigit(p[2]) || | |
815 | !isdigit(p[3]) || | |
816 | !isdigit(p[4]) || | |
817 | (p[5] != '\n')) | |
78543993 | 818 | return report(options, oid, type, FSCK_MSG_BAD_TIMEZONE, "invalid author/committer line - bad time zone"); |
e6826e33 | 819 | p += 6; |
daae1922 JN |
820 | return 0; |
821 | } | |
822 | ||
c5b4269b JK |
823 | static int fsck_commit(const struct object_id *oid, |
824 | const char *buffer, unsigned long size, | |
825 | struct fsck_options *options) | |
ba002f3b | 826 | { |
f648ee70 | 827 | struct object_id tree_oid, parent_oid; |
ec652315 | 828 | unsigned author_count; |
daae1922 | 829 | int err; |
6d2d780f | 830 | const char *buffer_begin = buffer; |
c54f5ca9 | 831 | const char *p; |
ba002f3b | 832 | |
c5b4269b | 833 | if (verify_headers(buffer, size, oid, OBJ_COMMIT, options)) |
4d0d8975 JS |
834 | return -1; |
835 | ||
cf4fff57 | 836 | if (!skip_prefix(buffer, "tree ", &buffer)) |
c5b4269b | 837 | return report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_TREE, "invalid format - expected 'tree' line"); |
c54f5ca9 | 838 | if (parse_oid_hex(buffer, &tree_oid, &p) || *p != '\n') { |
c5b4269b | 839 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_BAD_TREE_SHA1, "invalid 'tree' line format - bad sha1"); |
b3584761 JS |
840 | if (err) |
841 | return err; | |
842 | } | |
c54f5ca9 | 843 | buffer = p + 1; |
cf4fff57 | 844 | while (skip_prefix(buffer, "parent ", &buffer)) { |
f648ee70 | 845 | if (parse_oid_hex(buffer, &parent_oid, &p) || *p != '\n') { |
c5b4269b | 846 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_BAD_PARENT_SHA1, "invalid 'parent' line format - bad sha1"); |
b3584761 JS |
847 | if (err) |
848 | return err; | |
849 | } | |
c54f5ca9 | 850 | buffer = p + 1; |
ba002f3b | 851 | } |
c9ad147f JS |
852 | author_count = 0; |
853 | while (skip_prefix(buffer, "author ", &buffer)) { | |
854 | author_count++; | |
c5b4269b | 855 | err = fsck_ident(&buffer, oid, OBJ_COMMIT, options); |
c9ad147f JS |
856 | if (err) |
857 | return err; | |
ba002f3b | 858 | } |
c9ad147f | 859 | if (author_count < 1) |
c5b4269b | 860 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_AUTHOR, "invalid format - expected 'author' line"); |
c9ad147f | 861 | else if (author_count > 1) |
c5b4269b | 862 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_MULTIPLE_AUTHORS, "invalid format - multiple 'author' lines"); |
daae1922 JN |
863 | if (err) |
864 | return err; | |
cf4fff57 | 865 | if (!skip_prefix(buffer, "committer ", &buffer)) |
c5b4269b JK |
866 | return report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_COMMITTER, "invalid format - expected 'committer' line"); |
867 | err = fsck_ident(&buffer, oid, OBJ_COMMIT, options); | |
daae1922 JN |
868 | if (err) |
869 | return err; | |
6d2d780f | 870 | if (memchr(buffer_begin, '\0', size)) { |
c5b4269b | 871 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_NUL_IN_COMMIT, |
6d2d780f JH |
872 | "NUL byte in the commit object body"); |
873 | if (err) | |
874 | return err; | |
875 | } | |
ba002f3b MK |
876 | return 0; |
877 | } | |
878 | ||
103fb6d4 | 879 | static int fsck_tag(const struct object_id *oid, const char *buffer, |
2175a0c6 | 880 | unsigned long size, struct fsck_options *options) |
cec097be | 881 | { |
f648ee70 | 882 | struct object_id tagged_oid; |
acf9de4c ÆAB |
883 | int tagged_type; |
884 | return fsck_tag_standalone(oid, buffer, size, options, &tagged_oid, | |
885 | &tagged_type); | |
886 | } | |
887 | ||
888 | int fsck_tag_standalone(const struct object_id *oid, const char *buffer, | |
889 | unsigned long size, struct fsck_options *options, | |
890 | struct object_id *tagged_oid, | |
891 | int *tagged_type) | |
892 | { | |
cec097be | 893 | int ret = 0; |
23a173a7 | 894 | char *eol; |
cec097be | 895 | struct strbuf sb = STRBUF_INIT; |
c54f5ca9 | 896 | const char *p; |
cec097be | 897 | |
103fb6d4 | 898 | ret = verify_headers(buffer, size, oid, OBJ_TAG, options); |
8a272f29 | 899 | if (ret) |
cec097be JS |
900 | goto done; |
901 | ||
902 | if (!skip_prefix(buffer, "object ", &buffer)) { | |
103fb6d4 | 903 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_OBJECT, "invalid format - expected 'object' line"); |
cec097be JS |
904 | goto done; |
905 | } | |
acf9de4c | 906 | if (parse_oid_hex(buffer, tagged_oid, &p) || *p != '\n') { |
103fb6d4 | 907 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_BAD_OBJECT_SHA1, "invalid 'object' line format - bad sha1"); |
7d7d5b05 JS |
908 | if (ret) |
909 | goto done; | |
cec097be | 910 | } |
c54f5ca9 | 911 | buffer = p + 1; |
cec097be JS |
912 | |
913 | if (!skip_prefix(buffer, "type ", &buffer)) { | |
103fb6d4 | 914 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TYPE_ENTRY, "invalid format - expected 'type' line"); |
cec097be JS |
915 | goto done; |
916 | } | |
917 | eol = strchr(buffer, '\n'); | |
918 | if (!eol) { | |
103fb6d4 | 919 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TYPE, "invalid format - unexpected end after 'type' line"); |
cec097be JS |
920 | goto done; |
921 | } | |
acf9de4c ÆAB |
922 | *tagged_type = type_from_string_gently(buffer, eol - buffer, 1); |
923 | if (*tagged_type < 0) | |
103fb6d4 | 924 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_BAD_TYPE, "invalid 'type' value"); |
cec097be JS |
925 | if (ret) |
926 | goto done; | |
927 | buffer = eol + 1; | |
928 | ||
929 | if (!skip_prefix(buffer, "tag ", &buffer)) { | |
103fb6d4 | 930 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAG_ENTRY, "invalid format - expected 'tag' line"); |
cec097be JS |
931 | goto done; |
932 | } | |
933 | eol = strchr(buffer, '\n'); | |
934 | if (!eol) { | |
103fb6d4 | 935 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAG, "invalid format - unexpected end after 'type' line"); |
cec097be JS |
936 | goto done; |
937 | } | |
938 | strbuf_addf(&sb, "refs/tags/%.*s", (int)(eol - buffer), buffer); | |
f27d05b1 | 939 | if (check_refname_format(sb.buf, 0)) { |
103fb6d4 | 940 | ret = report(options, oid, OBJ_TAG, |
38370253 JK |
941 | FSCK_MSG_BAD_TAG_NAME, |
942 | "invalid 'tag' name: %.*s", | |
943 | (int)(eol - buffer), buffer); | |
f27d05b1 JS |
944 | if (ret) |
945 | goto done; | |
946 | } | |
cec097be JS |
947 | buffer = eol + 1; |
948 | ||
f27d05b1 | 949 | if (!skip_prefix(buffer, "tagger ", &buffer)) { |
cec097be | 950 | /* early tags do not contain 'tagger' lines; warn only */ |
103fb6d4 | 951 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAGGER_ENTRY, "invalid format - expected 'tagger' line"); |
f27d05b1 JS |
952 | if (ret) |
953 | goto done; | |
954 | } | |
cec097be | 955 | else |
103fb6d4 | 956 | ret = fsck_ident(&buffer, oid, OBJ_TAG, options); |
9a1a3a4d ÆAB |
957 | if (!*buffer) |
958 | goto done; | |
cec097be | 959 | |
acf9de4c ÆAB |
960 | if (!starts_with(buffer, "\n")) { |
961 | /* | |
962 | * The verify_headers() check will allow | |
963 | * e.g. "[...]tagger <tagger>\nsome | |
964 | * garbage\n\nmessage" to pass, thinking "some | |
965 | * garbage" could be a custom header. E.g. "mktag" | |
966 | * doesn't want any unknown headers. | |
967 | */ | |
968 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_EXTRA_HEADER_ENTRY, "invalid format - extra header(s) after 'tagger'"); | |
969 | if (ret) | |
970 | goto done; | |
971 | } | |
972 | ||
cec097be JS |
973 | done: |
974 | strbuf_release(&sb); | |
cec097be JS |
975 | return ret; |
976 | } | |
977 | ||
a2b26ffb JN |
978 | /* |
979 | * Like builtin/submodule--helper.c's starts_with_dot_slash, but without | |
980 | * relying on the platform-dependent is_dir_sep helper. | |
981 | * | |
982 | * This is for use in checking whether a submodule URL is interpreted as | |
983 | * relative to the current directory on any platform, since \ is a | |
984 | * directory separator on Windows but not on other platforms. | |
985 | */ | |
986 | static int starts_with_dot_slash(const char *str) | |
987 | { | |
988 | return str[0] == '.' && (str[1] == '/' || str[1] == '\\'); | |
989 | } | |
990 | ||
991 | /* | |
992 | * Like starts_with_dot_slash, this is a variant of submodule--helper's | |
993 | * helper of the same name with the twist that it accepts backslash as a | |
994 | * directory separator even on non-Windows platforms. | |
995 | */ | |
996 | static int starts_with_dot_dot_slash(const char *str) | |
997 | { | |
998 | return str[0] == '.' && starts_with_dot_slash(str + 1); | |
999 | } | |
1000 | ||
1001 | static int submodule_url_is_relative(const char *url) | |
1002 | { | |
1003 | return starts_with_dot_slash(url) || starts_with_dot_dot_slash(url); | |
1004 | } | |
1005 | ||
c44088ec JN |
1006 | /* |
1007 | * Count directory components that a relative submodule URL should chop | |
1008 | * from the remote_url it is to be resolved against. | |
1009 | * | |
1010 | * In other words, this counts "../" components at the start of a | |
1011 | * submodule URL. | |
1012 | * | |
1013 | * Returns the number of directory components to chop and writes a | |
1014 | * pointer to the next character of url after all leading "./" and | |
1015 | * "../" components to out. | |
1016 | */ | |
1017 | static int count_leading_dotdots(const char *url, const char **out) | |
1018 | { | |
1019 | int result = 0; | |
1020 | while (1) { | |
1021 | if (starts_with_dot_dot_slash(url)) { | |
1022 | result++; | |
1023 | url += strlen("../"); | |
1024 | continue; | |
1025 | } | |
1026 | if (starts_with_dot_slash(url)) { | |
1027 | url += strlen("./"); | |
1028 | continue; | |
1029 | } | |
1030 | *out = url; | |
1031 | return result; | |
1032 | } | |
1033 | } | |
a2b26ffb JN |
1034 | /* |
1035 | * Check whether a transport is implemented by git-remote-curl. | |
1036 | * | |
1037 | * If it is, returns 1 and writes the URL that would be passed to | |
1038 | * git-remote-curl to the "out" parameter. | |
1039 | * | |
1040 | * Otherwise, returns 0 and leaves "out" untouched. | |
1041 | * | |
1042 | * Examples: | |
1043 | * http::https://example.com/repo.git -> 1, https://example.com/repo.git | |
1044 | * https://example.com/repo.git -> 1, https://example.com/repo.git | |
1045 | * git://example.com/repo.git -> 0 | |
1046 | * | |
1047 | * This is for use in checking for previously exploitable bugs that | |
1048 | * required a submodule URL to be passed to git-remote-curl. | |
1049 | */ | |
1050 | static int url_to_curl_url(const char *url, const char **out) | |
1051 | { | |
1052 | /* | |
1053 | * We don't need to check for case-aliases, "http.exe", and so | |
1054 | * on because in the default configuration, is_transport_allowed | |
1055 | * prevents URLs with those schemes from being cloned | |
1056 | * automatically. | |
1057 | */ | |
1058 | if (skip_prefix(url, "http::", out) || | |
1059 | skip_prefix(url, "https::", out) || | |
1060 | skip_prefix(url, "ftp::", out) || | |
1061 | skip_prefix(url, "ftps::", out)) | |
1062 | return 1; | |
1063 | if (starts_with(url, "http://") || | |
1064 | starts_with(url, "https://") || | |
1065 | starts_with(url, "ftp://") || | |
1066 | starts_with(url, "ftps://")) { | |
1067 | *out = url; | |
1068 | return 1; | |
1069 | } | |
1070 | return 0; | |
1071 | } | |
1072 | ||
07259e74 JK |
1073 | static int check_submodule_url(const char *url) |
1074 | { | |
a2b26ffb | 1075 | const char *curl_url; |
07259e74 JK |
1076 | |
1077 | if (looks_like_command_line_option(url)) | |
1078 | return -1; | |
1079 | ||
6aed5673 | 1080 | if (submodule_url_is_relative(url) || starts_with(url, "git://")) { |
c44088ec JN |
1081 | char *decoded; |
1082 | const char *next; | |
1083 | int has_nl; | |
1084 | ||
a2b26ffb JN |
1085 | /* |
1086 | * This could be appended to an http URL and url-decoded; | |
1087 | * check for malicious characters. | |
1088 | */ | |
c44088ec JN |
1089 | decoded = url_decode(url); |
1090 | has_nl = !!strchr(decoded, '\n'); | |
1091 | ||
a2b26ffb JN |
1092 | free(decoded); |
1093 | if (has_nl) | |
1094 | return -1; | |
c44088ec JN |
1095 | |
1096 | /* | |
1097 | * URLs which escape their root via "../" can overwrite | |
1098 | * the host field and previous components, resolving to | |
1a3609e4 JN |
1099 | * URLs like https::example.com/submodule.git and |
1100 | * https:///example.com/submodule.git that were | |
c44088ec JN |
1101 | * susceptible to CVE-2020-11008. |
1102 | */ | |
1103 | if (count_leading_dotdots(url, &next) > 0 && | |
1a3609e4 | 1104 | (*next == ':' || *next == '/')) |
c44088ec | 1105 | return -1; |
a2b26ffb JN |
1106 | } |
1107 | ||
1108 | else if (url_to_curl_url(url, &curl_url)) { | |
1109 | struct credential c = CREDENTIAL_INIT; | |
1a3609e4 JN |
1110 | int ret = 0; |
1111 | if (credential_from_url_gently(&c, curl_url, 1) || | |
1112 | !*c.host) | |
1113 | ret = -1; | |
a2b26ffb JN |
1114 | credential_clear(&c); |
1115 | return ret; | |
1116 | } | |
1117 | ||
1118 | return 0; | |
07259e74 JK |
1119 | } |
1120 | ||
ed8b10f6 | 1121 | struct fsck_gitmodules_data { |
6da40b22 | 1122 | const struct object_id *oid; |
ed8b10f6 JK |
1123 | struct fsck_options *options; |
1124 | int ret; | |
1125 | }; | |
1126 | ||
1127 | static int fsck_gitmodules_fn(const char *var, const char *value, void *vdata) | |
1128 | { | |
1129 | struct fsck_gitmodules_data *data = vdata; | |
1130 | const char *subsection, *key; | |
f5914f4b | 1131 | size_t subsection_len; |
ed8b10f6 JK |
1132 | char *name; |
1133 | ||
1134 | if (parse_config_key(var, "submodule", &subsection, &subsection_len, &key) < 0 || | |
1135 | !subsection) | |
1136 | return 0; | |
1137 | ||
1138 | name = xmemdupz(subsection, subsection_len); | |
1139 | if (check_submodule_name(name) < 0) | |
38370253 | 1140 | data->ret |= report(data->options, |
6da40b22 | 1141 | data->oid, OBJ_BLOB, |
ed8b10f6 JK |
1142 | FSCK_MSG_GITMODULES_NAME, |
1143 | "disallowed submodule name: %s", | |
1144 | name); | |
a124133e | 1145 | if (!strcmp(key, "url") && value && |
07259e74 | 1146 | check_submodule_url(value) < 0) |
38370253 | 1147 | data->ret |= report(data->options, |
6da40b22 | 1148 | data->oid, OBJ_BLOB, |
a124133e JK |
1149 | FSCK_MSG_GITMODULES_URL, |
1150 | "disallowed submodule url: %s", | |
1151 | value); | |
1a7fd1fb JK |
1152 | if (!strcmp(key, "path") && value && |
1153 | looks_like_command_line_option(value)) | |
38370253 | 1154 | data->ret |= report(data->options, |
6da40b22 | 1155 | data->oid, OBJ_BLOB, |
1a7fd1fb JK |
1156 | FSCK_MSG_GITMODULES_PATH, |
1157 | "disallowed submodule path: %s", | |
1158 | value); | |
bb92255e JN |
1159 | if (!strcmp(key, "update") && value && |
1160 | parse_submodule_update_type(value) == SM_UPDATE_COMMAND) | |
7034cd09 | 1161 | data->ret |= report(data->options, data->oid, OBJ_BLOB, |
bb92255e JN |
1162 | FSCK_MSG_GITMODULES_UPDATE, |
1163 | "disallowed submodule update setting: %s", | |
1164 | value); | |
ed8b10f6 JK |
1165 | free(name); |
1166 | ||
1167 | return 0; | |
1168 | } | |
1169 | ||
6da40b22 | 1170 | static int fsck_blob(const struct object_id *oid, const char *buf, |
7ac4f3a0 JK |
1171 | unsigned long size, struct fsck_options *options) |
1172 | { | |
ed8b10f6 | 1173 | struct fsck_gitmodules_data data; |
de6bd9e3 | 1174 | struct config_options config_opts = { 0 }; |
ed8b10f6 | 1175 | |
c15087d1 | 1176 | if (!oidset_contains(&options->gitmodules_found, oid)) |
ed8b10f6 | 1177 | return 0; |
c15087d1 | 1178 | oidset_insert(&options->gitmodules_done, oid); |
ed8b10f6 | 1179 | |
6da40b22 | 1180 | if (object_on_skiplist(options, oid)) |
fb162877 RJ |
1181 | return 0; |
1182 | ||
ed8b10f6 JK |
1183 | if (!buf) { |
1184 | /* | |
1185 | * A missing buffer here is a sign that the caller found the | |
1186 | * blob too gigantic to load into memory. Let's just consider | |
1187 | * that an error. | |
1188 | */ | |
6da40b22 | 1189 | return report(options, oid, OBJ_BLOB, |
0d68764d | 1190 | FSCK_MSG_GITMODULES_LARGE, |
ed8b10f6 JK |
1191 | ".gitmodules too large to parse"); |
1192 | } | |
1193 | ||
6da40b22 | 1194 | data.oid = oid; |
ed8b10f6 JK |
1195 | data.options = options; |
1196 | data.ret = 0; | |
de6bd9e3 | 1197 | config_opts.error_action = CONFIG_ERROR_SILENT; |
ed8b10f6 | 1198 | if (git_config_from_mem(fsck_gitmodules_fn, CONFIG_ORIGIN_BLOB, |
de6bd9e3 | 1199 | ".gitmodules", buf, size, &data, &config_opts)) |
6da40b22 | 1200 | data.ret |= report(options, oid, OBJ_BLOB, |
ed8b10f6 JK |
1201 | FSCK_MSG_GITMODULES_PARSE, |
1202 | "could not parse gitmodules blob"); | |
1203 | ||
1204 | return data.ret; | |
7ac4f3a0 JK |
1205 | } |
1206 | ||
90a398bb | 1207 | int fsck_object(struct object *obj, void *data, unsigned long size, |
22410549 | 1208 | struct fsck_options *options) |
ba002f3b MK |
1209 | { |
1210 | if (!obj) | |
38370253 | 1211 | return report(options, NULL, OBJ_NONE, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck"); |
ba002f3b MK |
1212 | |
1213 | if (obj->type == OBJ_BLOB) | |
6da40b22 | 1214 | return fsck_blob(&obj->oid, data, size, options); |
ba002f3b | 1215 | if (obj->type == OBJ_TREE) |
b2f2039c | 1216 | return fsck_tree(&obj->oid, data, size, options); |
ba002f3b | 1217 | if (obj->type == OBJ_COMMIT) |
c5b4269b | 1218 | return fsck_commit(&obj->oid, data, size, options); |
ba002f3b | 1219 | if (obj->type == OBJ_TAG) |
103fb6d4 | 1220 | return fsck_tag(&obj->oid, data, size, options); |
ba002f3b | 1221 | |
38370253 JK |
1222 | return report(options, &obj->oid, obj->type, |
1223 | FSCK_MSG_UNKNOWN_TYPE, | |
1224 | "unknown type '%d' (internal fsck error)", | |
1225 | obj->type); | |
ba002f3b | 1226 | } |
d6ffc8d7 | 1227 | |
1cd772cc | 1228 | int fsck_error_function(struct fsck_options *o, |
5afc4b1d JK |
1229 | const struct object_id *oid, |
1230 | enum object_type object_type, | |
394d5d31 ÆAB |
1231 | enum fsck_msg_type msg_type, |
1232 | enum fsck_msg_id msg_id, | |
1233 | const char *message) | |
d6ffc8d7 | 1234 | { |
0282f4dc | 1235 | if (msg_type == FSCK_WARN) { |
5afc4b1d | 1236 | warning("object %s: %s", fsck_describe_object(o, oid), message); |
0282f4dc JS |
1237 | return 0; |
1238 | } | |
5afc4b1d | 1239 | error("object %s: %s", fsck_describe_object(o, oid), message); |
d6ffc8d7 MK |
1240 | return 1; |
1241 | } | |
159e7b08 JK |
1242 | |
1243 | int fsck_finish(struct fsck_options *options) | |
1244 | { | |
1245 | int ret = 0; | |
1246 | struct oidset_iter iter; | |
1247 | const struct object_id *oid; | |
1248 | ||
c15087d1 | 1249 | oidset_iter_init(&options->gitmodules_found, &iter); |
159e7b08 | 1250 | while ((oid = oidset_iter_next(&iter))) { |
159e7b08 JK |
1251 | enum object_type type; |
1252 | unsigned long size; | |
1253 | char *buf; | |
1254 | ||
c15087d1 | 1255 | if (oidset_contains(&options->gitmodules_done, oid)) |
159e7b08 JK |
1256 | continue; |
1257 | ||
7913f53b | 1258 | buf = read_object_file(oid, &type, &size); |
159e7b08 | 1259 | if (!buf) { |
b8b00f16 | 1260 | if (is_promisor_object(oid)) |
27387444 | 1261 | continue; |
38370253 | 1262 | ret |= report(options, |
b8b00f16 | 1263 | oid, OBJ_BLOB, |
159e7b08 JK |
1264 | FSCK_MSG_GITMODULES_MISSING, |
1265 | "unable to read .gitmodules blob"); | |
1266 | continue; | |
1267 | } | |
1268 | ||
1269 | if (type == OBJ_BLOB) | |
b8b00f16 | 1270 | ret |= fsck_blob(oid, buf, size, options); |
159e7b08 | 1271 | else |
38370253 | 1272 | ret |= report(options, |
b8b00f16 | 1273 | oid, type, |
159e7b08 JK |
1274 | FSCK_MSG_GITMODULES_BLOB, |
1275 | "non-blob found at .gitmodules"); | |
1276 | free(buf); | |
1277 | } | |
1278 | ||
1279 | ||
c15087d1 ÆAB |
1280 | oidset_clear(&options->gitmodules_found); |
1281 | oidset_clear(&options->gitmodules_done); | |
159e7b08 JK |
1282 | return ret; |
1283 | } | |
1f3299fd | 1284 | |
fb79f5bf | 1285 | int git_fsck_config(const char *var, const char *value, void *cb) |
1f3299fd | 1286 | { |
fb79f5bf | 1287 | struct fsck_options *options = cb; |
1f3299fd ÆAB |
1288 | if (strcmp(var, "fsck.skiplist") == 0) { |
1289 | const char *path; | |
1290 | struct strbuf sb = STRBUF_INIT; | |
1291 | ||
1292 | if (git_config_pathname(&path, var, value)) | |
1293 | return 1; | |
1294 | strbuf_addf(&sb, "skiplist=%s", path); | |
1295 | free((char *)path); | |
1296 | fsck_set_msg_types(options, sb.buf); | |
1297 | strbuf_release(&sb); | |
1298 | return 0; | |
1299 | } | |
1300 | ||
1301 | if (skip_prefix(var, "fsck.", &var)) { | |
1302 | fsck_set_msg_type(options, var, value); | |
1303 | return 0; | |
1304 | } | |
1305 | ||
1306 | return git_default_config(var, value, cb); | |
1307 | } | |
3745e269 ÆAB |
1308 | |
1309 | /* | |
1310 | * Custom error callbacks that are used in more than one place. | |
1311 | */ | |
1312 | ||
1313 | int fsck_error_cb_print_missing_gitmodules(struct fsck_options *o, | |
1314 | const struct object_id *oid, | |
1315 | enum object_type object_type, | |
1316 | enum fsck_msg_type msg_type, | |
1317 | enum fsck_msg_id msg_id, | |
1318 | const char *message) | |
1319 | { | |
1320 | if (msg_id == FSCK_MSG_GITMODULES_MISSING) { | |
1321 | puts(oid_to_hex(oid)); | |
1322 | return 0; | |
1323 | } | |
1324 | return fsck_error_function(o, oid, object_type, msg_type, msg_id, message); | |
1325 | } |