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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)) { |
9e1947cb | 582 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree"); |
8354fa3d DT |
583 | return retval; |
584 | } | |
ba002f3b MK |
585 | |
586 | o_mode = 0; | |
587 | o_name = NULL; | |
ba002f3b MK |
588 | |
589 | while (desc.size) { | |
5ec1e728 | 590 | unsigned short mode; |
288a74bc | 591 | const char *name, *backslash; |
9e1947cb | 592 | const struct object_id *entry_oid; |
ba002f3b | 593 | |
9e1947cb | 594 | entry_oid = tree_entry_extract(&desc, &name, &mode); |
ba002f3b | 595 | |
9e1947cb | 596 | has_null_sha1 |= is_null_oid(entry_oid); |
effd12ec HS |
597 | has_full_path |= !!strchr(name, '/'); |
598 | has_empty_name |= !*name; | |
599 | has_dot |= !strcmp(name, "."); | |
600 | has_dotdot |= !strcmp(name, ".."); | |
ed9c3220 | 601 | has_dotgit |= is_hfs_dotgit(name) || is_ntfs_dotgit(name); |
ba002f3b | 602 | has_zero_pad |= *(char *)desc.buffer == '0'; |
159e7b08 | 603 | |
b7b1fca1 JK |
604 | if (is_hfs_dotgitmodules(name) || is_ntfs_dotgitmodules(name)) { |
605 | if (!S_ISLNK(mode)) | |
9e1947cb JK |
606 | oidset_insert(&options->gitmodules_found, |
607 | entry_oid); | |
b7b1fca1 | 608 | else |
38370253 | 609 | retval += report(options, |
9e1947cb | 610 | tree_oid, OBJ_TREE, |
b7b1fca1 JK |
611 | FSCK_MSG_GITMODULES_SYMLINK, |
612 | ".gitmodules is a symbolic link"); | |
613 | } | |
159e7b08 | 614 | |
288a74bc JS |
615 | if ((backslash = strchr(name, '\\'))) { |
616 | while (backslash) { | |
617 | backslash++; | |
618 | has_dotgit |= is_ntfs_dotgit(backslash); | |
bdfef049 JS |
619 | if (is_ntfs_dotgitmodules(backslash)) { |
620 | if (!S_ISLNK(mode)) | |
9e1947cb JK |
621 | oidset_insert(&options->gitmodules_found, |
622 | entry_oid); | |
bdfef049 | 623 | else |
9e1947cb | 624 | retval += report(options, tree_oid, OBJ_TREE, |
bdfef049 JS |
625 | FSCK_MSG_GITMODULES_SYMLINK, |
626 | ".gitmodules is a symbolic link"); | |
627 | } | |
288a74bc JS |
628 | backslash = strchr(backslash, '\\'); |
629 | } | |
630 | } | |
631 | ||
8354fa3d | 632 | if (update_tree_entry_gently(&desc)) { |
9e1947cb | 633 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree"); |
8354fa3d DT |
634 | break; |
635 | } | |
ba002f3b MK |
636 | |
637 | switch (mode) { | |
638 | /* | |
639 | * Standard modes.. | |
640 | */ | |
641 | case S_IFREG | 0755: | |
642 | case S_IFREG | 0644: | |
643 | case S_IFLNK: | |
644 | case S_IFDIR: | |
645 | case S_IFGITLINK: | |
646 | break; | |
647 | /* | |
648 | * This is nonstandard, but we had a few of these | |
649 | * early on when we honored the full set of mode | |
650 | * bits.. | |
651 | */ | |
652 | case S_IFREG | 0664: | |
22410549 | 653 | if (!options->strict) |
ba002f3b | 654 | break; |
1cf01a34 | 655 | /* fallthrough */ |
ba002f3b MK |
656 | default: |
657 | has_bad_modes = 1; | |
658 | } | |
659 | ||
660 | if (o_name) { | |
9068cfb2 RS |
661 | switch (verify_ordered(o_mode, o_name, mode, name, |
662 | &df_dup_candidates)) { | |
ba002f3b MK |
663 | case TREE_UNORDERED: |
664 | not_properly_sorted = 1; | |
665 | break; | |
666 | case TREE_HAS_DUPS: | |
667 | has_dup_entries = 1; | |
668 | break; | |
669 | default: | |
670 | break; | |
671 | } | |
672 | } | |
673 | ||
674 | o_mode = mode; | |
675 | o_name = name; | |
ba002f3b MK |
676 | } |
677 | ||
9068cfb2 RS |
678 | name_stack_clear(&df_dup_candidates); |
679 | ||
c479d14a | 680 | if (has_null_sha1) |
9e1947cb | 681 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_NULL_SHA1, "contains entries pointing to null sha1"); |
ba002f3b | 682 | if (has_full_path) |
9e1947cb | 683 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_FULL_PATHNAME, "contains full pathnames"); |
ba002f3b | 684 | if (has_empty_name) |
9e1947cb | 685 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_EMPTY_NAME, "contains empty pathname"); |
5d34a435 | 686 | if (has_dot) |
9e1947cb | 687 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_HAS_DOT, "contains '.'"); |
5d34a435 | 688 | if (has_dotdot) |
9e1947cb | 689 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_HAS_DOTDOT, "contains '..'"); |
5c17f512 | 690 | if (has_dotgit) |
9e1947cb | 691 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_HAS_DOTGIT, "contains '.git'"); |
ba002f3b | 692 | if (has_zero_pad) |
9e1947cb | 693 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_ZERO_PADDED_FILEMODE, "contains zero-padded file modes"); |
ba002f3b | 694 | if (has_bad_modes) |
9e1947cb | 695 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_BAD_FILEMODE, "contains bad file modes"); |
ba002f3b | 696 | if (has_dup_entries) |
9e1947cb | 697 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_DUPLICATE_ENTRIES, "contains duplicate file entries"); |
ba002f3b | 698 | if (not_properly_sorted) |
9e1947cb | 699 | retval += report(options, tree_oid, OBJ_TREE, FSCK_MSG_TREE_NOT_SORTED, "not properly sorted"); |
ba002f3b MK |
700 | return retval; |
701 | } | |
702 | ||
84d18c0b | 703 | static int verify_headers(const void *data, unsigned long size, |
cc579000 JK |
704 | const struct object_id *oid, enum object_type type, |
705 | struct fsck_options *options) | |
4d0d8975 JS |
706 | { |
707 | const char *buffer = (const char *)data; | |
708 | unsigned long i; | |
709 | ||
710 | for (i = 0; i < size; i++) { | |
711 | switch (buffer[i]) { | |
712 | case '\0': | |
cc579000 | 713 | return report(options, oid, type, |
c99ba492 JS |
714 | FSCK_MSG_NUL_IN_HEADER, |
715 | "unterminated header: NUL at offset %ld", i); | |
4d0d8975 JS |
716 | case '\n': |
717 | if (i + 1 < size && buffer[i + 1] == '\n') | |
718 | return 0; | |
719 | } | |
720 | } | |
721 | ||
84d18c0b JH |
722 | /* |
723 | * We did not find double-LF that separates the header | |
724 | * and the body. Not having a body is not a crime but | |
725 | * we do want to see the terminating LF for the last header | |
726 | * line. | |
727 | */ | |
728 | if (size && buffer[size - 1] == '\n') | |
729 | return 0; | |
730 | ||
cc579000 | 731 | return report(options, oid, type, |
c99ba492 | 732 | FSCK_MSG_UNTERMINATED_HEADER, "unterminated header"); |
4d0d8975 JS |
733 | } |
734 | ||
78543993 JK |
735 | static int fsck_ident(const char **ident, |
736 | const struct object_id *oid, enum object_type type, | |
737 | struct fsck_options *options) | |
daae1922 | 738 | { |
e6826e33 | 739 | const char *p = *ident; |
d4b8de04 JK |
740 | char *end; |
741 | ||
e6826e33 JS |
742 | *ident = strchrnul(*ident, '\n'); |
743 | if (**ident == '\n') | |
744 | (*ident)++; | |
745 | ||
746 | if (*p == '<') | |
78543993 | 747 | return report(options, oid, type, FSCK_MSG_MISSING_NAME_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); |
e6826e33 JS |
748 | p += strcspn(p, "<>\n"); |
749 | if (*p == '>') | |
78543993 | 750 | return report(options, oid, type, FSCK_MSG_BAD_NAME, "invalid author/committer line - bad name"); |
e6826e33 | 751 | if (*p != '<') |
78543993 | 752 | return report(options, oid, type, FSCK_MSG_MISSING_EMAIL, "invalid author/committer line - missing email"); |
e6826e33 | 753 | if (p[-1] != ' ') |
78543993 | 754 | return report(options, oid, type, FSCK_MSG_MISSING_SPACE_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); |
e6826e33 JS |
755 | p++; |
756 | p += strcspn(p, "<>\n"); | |
757 | if (*p != '>') | |
78543993 | 758 | return report(options, oid, type, FSCK_MSG_BAD_EMAIL, "invalid author/committer line - bad email"); |
e6826e33 JS |
759 | p++; |
760 | if (*p != ' ') | |
78543993 | 761 | return report(options, oid, type, FSCK_MSG_MISSING_SPACE_BEFORE_DATE, "invalid author/committer line - missing space before date"); |
e6826e33 JS |
762 | p++; |
763 | if (*p == '0' && p[1] != ' ') | |
78543993 | 764 | return report(options, oid, type, FSCK_MSG_ZERO_PADDED_DATE, "invalid author/committer line - zero-padded date"); |
1aeb7e75 | 765 | if (date_overflows(parse_timestamp(p, &end, 10))) |
78543993 | 766 | return report(options, oid, type, FSCK_MSG_BAD_DATE_OVERFLOW, "invalid author/committer line - date causes integer overflow"); |
e6826e33 | 767 | if ((end == p || *end != ' ')) |
78543993 | 768 | return report(options, oid, type, FSCK_MSG_BAD_DATE, "invalid author/committer line - bad date"); |
e6826e33 JS |
769 | p = end + 1; |
770 | if ((*p != '+' && *p != '-') || | |
771 | !isdigit(p[1]) || | |
772 | !isdigit(p[2]) || | |
773 | !isdigit(p[3]) || | |
774 | !isdigit(p[4]) || | |
775 | (p[5] != '\n')) | |
78543993 | 776 | return report(options, oid, type, FSCK_MSG_BAD_TIMEZONE, "invalid author/committer line - bad time zone"); |
e6826e33 | 777 | p += 6; |
daae1922 JN |
778 | return 0; |
779 | } | |
780 | ||
c5b4269b JK |
781 | static int fsck_commit(const struct object_id *oid, |
782 | const char *buffer, unsigned long size, | |
783 | struct fsck_options *options) | |
ba002f3b | 784 | { |
f648ee70 | 785 | struct object_id tree_oid, parent_oid; |
ec652315 | 786 | unsigned author_count; |
daae1922 | 787 | int err; |
6d2d780f | 788 | const char *buffer_begin = buffer; |
c54f5ca9 | 789 | const char *p; |
ba002f3b | 790 | |
c5b4269b | 791 | if (verify_headers(buffer, size, oid, OBJ_COMMIT, options)) |
4d0d8975 JS |
792 | return -1; |
793 | ||
cf4fff57 | 794 | if (!skip_prefix(buffer, "tree ", &buffer)) |
c5b4269b | 795 | return report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_TREE, "invalid format - expected 'tree' line"); |
c54f5ca9 | 796 | if (parse_oid_hex(buffer, &tree_oid, &p) || *p != '\n') { |
c5b4269b | 797 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_BAD_TREE_SHA1, "invalid 'tree' line format - bad sha1"); |
b3584761 JS |
798 | if (err) |
799 | return err; | |
800 | } | |
c54f5ca9 | 801 | buffer = p + 1; |
cf4fff57 | 802 | while (skip_prefix(buffer, "parent ", &buffer)) { |
f648ee70 | 803 | if (parse_oid_hex(buffer, &parent_oid, &p) || *p != '\n') { |
c5b4269b | 804 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_BAD_PARENT_SHA1, "invalid 'parent' line format - bad sha1"); |
b3584761 JS |
805 | if (err) |
806 | return err; | |
807 | } | |
c54f5ca9 | 808 | buffer = p + 1; |
ba002f3b | 809 | } |
c9ad147f JS |
810 | author_count = 0; |
811 | while (skip_prefix(buffer, "author ", &buffer)) { | |
812 | author_count++; | |
c5b4269b | 813 | err = fsck_ident(&buffer, oid, OBJ_COMMIT, options); |
c9ad147f JS |
814 | if (err) |
815 | return err; | |
ba002f3b | 816 | } |
c9ad147f | 817 | if (author_count < 1) |
c5b4269b | 818 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_AUTHOR, "invalid format - expected 'author' line"); |
c9ad147f | 819 | else if (author_count > 1) |
c5b4269b | 820 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_MULTIPLE_AUTHORS, "invalid format - multiple 'author' lines"); |
daae1922 JN |
821 | if (err) |
822 | return err; | |
cf4fff57 | 823 | if (!skip_prefix(buffer, "committer ", &buffer)) |
c5b4269b JK |
824 | return report(options, oid, OBJ_COMMIT, FSCK_MSG_MISSING_COMMITTER, "invalid format - expected 'committer' line"); |
825 | err = fsck_ident(&buffer, oid, OBJ_COMMIT, options); | |
daae1922 JN |
826 | if (err) |
827 | return err; | |
6d2d780f | 828 | if (memchr(buffer_begin, '\0', size)) { |
c5b4269b | 829 | err = report(options, oid, OBJ_COMMIT, FSCK_MSG_NUL_IN_COMMIT, |
6d2d780f JH |
830 | "NUL byte in the commit object body"); |
831 | if (err) | |
832 | return err; | |
833 | } | |
ba002f3b MK |
834 | return 0; |
835 | } | |
836 | ||
103fb6d4 | 837 | static int fsck_tag(const struct object_id *oid, const char *buffer, |
2175a0c6 | 838 | unsigned long size, struct fsck_options *options) |
cec097be | 839 | { |
f648ee70 | 840 | struct object_id tagged_oid; |
acf9de4c ÆAB |
841 | int tagged_type; |
842 | return fsck_tag_standalone(oid, buffer, size, options, &tagged_oid, | |
843 | &tagged_type); | |
844 | } | |
845 | ||
846 | int fsck_tag_standalone(const struct object_id *oid, const char *buffer, | |
847 | unsigned long size, struct fsck_options *options, | |
848 | struct object_id *tagged_oid, | |
849 | int *tagged_type) | |
850 | { | |
cec097be | 851 | int ret = 0; |
23a173a7 | 852 | char *eol; |
cec097be | 853 | struct strbuf sb = STRBUF_INIT; |
c54f5ca9 | 854 | const char *p; |
cec097be | 855 | |
103fb6d4 | 856 | ret = verify_headers(buffer, size, oid, OBJ_TAG, options); |
8a272f29 | 857 | if (ret) |
cec097be JS |
858 | goto done; |
859 | ||
860 | if (!skip_prefix(buffer, "object ", &buffer)) { | |
103fb6d4 | 861 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_OBJECT, "invalid format - expected 'object' line"); |
cec097be JS |
862 | goto done; |
863 | } | |
acf9de4c | 864 | if (parse_oid_hex(buffer, tagged_oid, &p) || *p != '\n') { |
103fb6d4 | 865 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_BAD_OBJECT_SHA1, "invalid 'object' line format - bad sha1"); |
7d7d5b05 JS |
866 | if (ret) |
867 | goto done; | |
cec097be | 868 | } |
c54f5ca9 | 869 | buffer = p + 1; |
cec097be JS |
870 | |
871 | if (!skip_prefix(buffer, "type ", &buffer)) { | |
103fb6d4 | 872 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TYPE_ENTRY, "invalid format - expected 'type' line"); |
cec097be JS |
873 | goto done; |
874 | } | |
875 | eol = strchr(buffer, '\n'); | |
876 | if (!eol) { | |
103fb6d4 | 877 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TYPE, "invalid format - unexpected end after 'type' line"); |
cec097be JS |
878 | goto done; |
879 | } | |
acf9de4c ÆAB |
880 | *tagged_type = type_from_string_gently(buffer, eol - buffer, 1); |
881 | if (*tagged_type < 0) | |
103fb6d4 | 882 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_BAD_TYPE, "invalid 'type' value"); |
cec097be JS |
883 | if (ret) |
884 | goto done; | |
885 | buffer = eol + 1; | |
886 | ||
887 | if (!skip_prefix(buffer, "tag ", &buffer)) { | |
103fb6d4 | 888 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAG_ENTRY, "invalid format - expected 'tag' line"); |
cec097be JS |
889 | goto done; |
890 | } | |
891 | eol = strchr(buffer, '\n'); | |
892 | if (!eol) { | |
103fb6d4 | 893 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAG, "invalid format - unexpected end after 'type' line"); |
cec097be JS |
894 | goto done; |
895 | } | |
896 | strbuf_addf(&sb, "refs/tags/%.*s", (int)(eol - buffer), buffer); | |
f27d05b1 | 897 | if (check_refname_format(sb.buf, 0)) { |
103fb6d4 | 898 | ret = report(options, oid, OBJ_TAG, |
38370253 JK |
899 | FSCK_MSG_BAD_TAG_NAME, |
900 | "invalid 'tag' name: %.*s", | |
901 | (int)(eol - buffer), buffer); | |
f27d05b1 JS |
902 | if (ret) |
903 | goto done; | |
904 | } | |
cec097be JS |
905 | buffer = eol + 1; |
906 | ||
f27d05b1 | 907 | if (!skip_prefix(buffer, "tagger ", &buffer)) { |
cec097be | 908 | /* early tags do not contain 'tagger' lines; warn only */ |
103fb6d4 | 909 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_MISSING_TAGGER_ENTRY, "invalid format - expected 'tagger' line"); |
f27d05b1 JS |
910 | if (ret) |
911 | goto done; | |
912 | } | |
cec097be | 913 | else |
103fb6d4 | 914 | ret = fsck_ident(&buffer, oid, OBJ_TAG, options); |
9a1a3a4d ÆAB |
915 | if (!*buffer) |
916 | goto done; | |
cec097be | 917 | |
acf9de4c ÆAB |
918 | if (!starts_with(buffer, "\n")) { |
919 | /* | |
920 | * The verify_headers() check will allow | |
921 | * e.g. "[...]tagger <tagger>\nsome | |
922 | * garbage\n\nmessage" to pass, thinking "some | |
923 | * garbage" could be a custom header. E.g. "mktag" | |
924 | * doesn't want any unknown headers. | |
925 | */ | |
926 | ret = report(options, oid, OBJ_TAG, FSCK_MSG_EXTRA_HEADER_ENTRY, "invalid format - extra header(s) after 'tagger'"); | |
927 | if (ret) | |
928 | goto done; | |
929 | } | |
930 | ||
cec097be JS |
931 | done: |
932 | strbuf_release(&sb); | |
cec097be JS |
933 | return ret; |
934 | } | |
935 | ||
a2b26ffb JN |
936 | /* |
937 | * Like builtin/submodule--helper.c's starts_with_dot_slash, but without | |
938 | * relying on the platform-dependent is_dir_sep helper. | |
939 | * | |
940 | * This is for use in checking whether a submodule URL is interpreted as | |
941 | * relative to the current directory on any platform, since \ is a | |
942 | * directory separator on Windows but not on other platforms. | |
943 | */ | |
944 | static int starts_with_dot_slash(const char *str) | |
945 | { | |
946 | return str[0] == '.' && (str[1] == '/' || str[1] == '\\'); | |
947 | } | |
948 | ||
949 | /* | |
950 | * Like starts_with_dot_slash, this is a variant of submodule--helper's | |
951 | * helper of the same name with the twist that it accepts backslash as a | |
952 | * directory separator even on non-Windows platforms. | |
953 | */ | |
954 | static int starts_with_dot_dot_slash(const char *str) | |
955 | { | |
956 | return str[0] == '.' && starts_with_dot_slash(str + 1); | |
957 | } | |
958 | ||
959 | static int submodule_url_is_relative(const char *url) | |
960 | { | |
961 | return starts_with_dot_slash(url) || starts_with_dot_dot_slash(url); | |
962 | } | |
963 | ||
c44088ec JN |
964 | /* |
965 | * Count directory components that a relative submodule URL should chop | |
966 | * from the remote_url it is to be resolved against. | |
967 | * | |
968 | * In other words, this counts "../" components at the start of a | |
969 | * submodule URL. | |
970 | * | |
971 | * Returns the number of directory components to chop and writes a | |
972 | * pointer to the next character of url after all leading "./" and | |
973 | * "../" components to out. | |
974 | */ | |
975 | static int count_leading_dotdots(const char *url, const char **out) | |
976 | { | |
977 | int result = 0; | |
978 | while (1) { | |
979 | if (starts_with_dot_dot_slash(url)) { | |
980 | result++; | |
981 | url += strlen("../"); | |
982 | continue; | |
983 | } | |
984 | if (starts_with_dot_slash(url)) { | |
985 | url += strlen("./"); | |
986 | continue; | |
987 | } | |
988 | *out = url; | |
989 | return result; | |
990 | } | |
991 | } | |
a2b26ffb JN |
992 | /* |
993 | * Check whether a transport is implemented by git-remote-curl. | |
994 | * | |
995 | * If it is, returns 1 and writes the URL that would be passed to | |
996 | * git-remote-curl to the "out" parameter. | |
997 | * | |
998 | * Otherwise, returns 0 and leaves "out" untouched. | |
999 | * | |
1000 | * Examples: | |
1001 | * http::https://example.com/repo.git -> 1, https://example.com/repo.git | |
1002 | * https://example.com/repo.git -> 1, https://example.com/repo.git | |
1003 | * git://example.com/repo.git -> 0 | |
1004 | * | |
1005 | * This is for use in checking for previously exploitable bugs that | |
1006 | * required a submodule URL to be passed to git-remote-curl. | |
1007 | */ | |
1008 | static int url_to_curl_url(const char *url, const char **out) | |
1009 | { | |
1010 | /* | |
1011 | * We don't need to check for case-aliases, "http.exe", and so | |
1012 | * on because in the default configuration, is_transport_allowed | |
1013 | * prevents URLs with those schemes from being cloned | |
1014 | * automatically. | |
1015 | */ | |
1016 | if (skip_prefix(url, "http::", out) || | |
1017 | skip_prefix(url, "https::", out) || | |
1018 | skip_prefix(url, "ftp::", out) || | |
1019 | skip_prefix(url, "ftps::", out)) | |
1020 | return 1; | |
1021 | if (starts_with(url, "http://") || | |
1022 | starts_with(url, "https://") || | |
1023 | starts_with(url, "ftp://") || | |
1024 | starts_with(url, "ftps://")) { | |
1025 | *out = url; | |
1026 | return 1; | |
1027 | } | |
1028 | return 0; | |
1029 | } | |
1030 | ||
07259e74 JK |
1031 | static int check_submodule_url(const char *url) |
1032 | { | |
a2b26ffb | 1033 | const char *curl_url; |
07259e74 JK |
1034 | |
1035 | if (looks_like_command_line_option(url)) | |
1036 | return -1; | |
1037 | ||
6aed5673 | 1038 | if (submodule_url_is_relative(url) || starts_with(url, "git://")) { |
c44088ec JN |
1039 | char *decoded; |
1040 | const char *next; | |
1041 | int has_nl; | |
1042 | ||
a2b26ffb JN |
1043 | /* |
1044 | * This could be appended to an http URL and url-decoded; | |
1045 | * check for malicious characters. | |
1046 | */ | |
c44088ec JN |
1047 | decoded = url_decode(url); |
1048 | has_nl = !!strchr(decoded, '\n'); | |
1049 | ||
a2b26ffb JN |
1050 | free(decoded); |
1051 | if (has_nl) | |
1052 | return -1; | |
c44088ec JN |
1053 | |
1054 | /* | |
1055 | * URLs which escape their root via "../" can overwrite | |
1056 | * the host field and previous components, resolving to | |
1a3609e4 JN |
1057 | * URLs like https::example.com/submodule.git and |
1058 | * https:///example.com/submodule.git that were | |
c44088ec JN |
1059 | * susceptible to CVE-2020-11008. |
1060 | */ | |
1061 | if (count_leading_dotdots(url, &next) > 0 && | |
1a3609e4 | 1062 | (*next == ':' || *next == '/')) |
c44088ec | 1063 | return -1; |
a2b26ffb JN |
1064 | } |
1065 | ||
1066 | else if (url_to_curl_url(url, &curl_url)) { | |
1067 | struct credential c = CREDENTIAL_INIT; | |
1a3609e4 JN |
1068 | int ret = 0; |
1069 | if (credential_from_url_gently(&c, curl_url, 1) || | |
1070 | !*c.host) | |
1071 | ret = -1; | |
a2b26ffb JN |
1072 | credential_clear(&c); |
1073 | return ret; | |
1074 | } | |
1075 | ||
1076 | return 0; | |
07259e74 JK |
1077 | } |
1078 | ||
ed8b10f6 | 1079 | struct fsck_gitmodules_data { |
6da40b22 | 1080 | const struct object_id *oid; |
ed8b10f6 JK |
1081 | struct fsck_options *options; |
1082 | int ret; | |
1083 | }; | |
1084 | ||
1085 | static int fsck_gitmodules_fn(const char *var, const char *value, void *vdata) | |
1086 | { | |
1087 | struct fsck_gitmodules_data *data = vdata; | |
1088 | const char *subsection, *key; | |
f5914f4b | 1089 | size_t subsection_len; |
ed8b10f6 JK |
1090 | char *name; |
1091 | ||
1092 | if (parse_config_key(var, "submodule", &subsection, &subsection_len, &key) < 0 || | |
1093 | !subsection) | |
1094 | return 0; | |
1095 | ||
1096 | name = xmemdupz(subsection, subsection_len); | |
1097 | if (check_submodule_name(name) < 0) | |
38370253 | 1098 | data->ret |= report(data->options, |
6da40b22 | 1099 | data->oid, OBJ_BLOB, |
ed8b10f6 JK |
1100 | FSCK_MSG_GITMODULES_NAME, |
1101 | "disallowed submodule name: %s", | |
1102 | name); | |
a124133e | 1103 | if (!strcmp(key, "url") && value && |
07259e74 | 1104 | check_submodule_url(value) < 0) |
38370253 | 1105 | data->ret |= report(data->options, |
6da40b22 | 1106 | data->oid, OBJ_BLOB, |
a124133e JK |
1107 | FSCK_MSG_GITMODULES_URL, |
1108 | "disallowed submodule url: %s", | |
1109 | value); | |
1a7fd1fb JK |
1110 | if (!strcmp(key, "path") && value && |
1111 | looks_like_command_line_option(value)) | |
38370253 | 1112 | data->ret |= report(data->options, |
6da40b22 | 1113 | data->oid, OBJ_BLOB, |
1a7fd1fb JK |
1114 | FSCK_MSG_GITMODULES_PATH, |
1115 | "disallowed submodule path: %s", | |
1116 | value); | |
bb92255e JN |
1117 | if (!strcmp(key, "update") && value && |
1118 | parse_submodule_update_type(value) == SM_UPDATE_COMMAND) | |
7034cd09 | 1119 | data->ret |= report(data->options, data->oid, OBJ_BLOB, |
bb92255e JN |
1120 | FSCK_MSG_GITMODULES_UPDATE, |
1121 | "disallowed submodule update setting: %s", | |
1122 | value); | |
ed8b10f6 JK |
1123 | free(name); |
1124 | ||
1125 | return 0; | |
1126 | } | |
1127 | ||
6da40b22 | 1128 | static int fsck_blob(const struct object_id *oid, const char *buf, |
7ac4f3a0 JK |
1129 | unsigned long size, struct fsck_options *options) |
1130 | { | |
ed8b10f6 | 1131 | struct fsck_gitmodules_data data; |
de6bd9e3 | 1132 | struct config_options config_opts = { 0 }; |
ed8b10f6 | 1133 | |
c15087d1 | 1134 | if (!oidset_contains(&options->gitmodules_found, oid)) |
ed8b10f6 | 1135 | return 0; |
c15087d1 | 1136 | oidset_insert(&options->gitmodules_done, oid); |
ed8b10f6 | 1137 | |
6da40b22 | 1138 | if (object_on_skiplist(options, oid)) |
fb162877 RJ |
1139 | return 0; |
1140 | ||
ed8b10f6 JK |
1141 | if (!buf) { |
1142 | /* | |
1143 | * A missing buffer here is a sign that the caller found the | |
1144 | * blob too gigantic to load into memory. Let's just consider | |
1145 | * that an error. | |
1146 | */ | |
6da40b22 | 1147 | return report(options, oid, OBJ_BLOB, |
0d68764d | 1148 | FSCK_MSG_GITMODULES_LARGE, |
ed8b10f6 JK |
1149 | ".gitmodules too large to parse"); |
1150 | } | |
1151 | ||
6da40b22 | 1152 | data.oid = oid; |
ed8b10f6 JK |
1153 | data.options = options; |
1154 | data.ret = 0; | |
de6bd9e3 | 1155 | config_opts.error_action = CONFIG_ERROR_SILENT; |
ed8b10f6 | 1156 | if (git_config_from_mem(fsck_gitmodules_fn, CONFIG_ORIGIN_BLOB, |
de6bd9e3 | 1157 | ".gitmodules", buf, size, &data, &config_opts)) |
6da40b22 | 1158 | data.ret |= report(options, oid, OBJ_BLOB, |
ed8b10f6 JK |
1159 | FSCK_MSG_GITMODULES_PARSE, |
1160 | "could not parse gitmodules blob"); | |
1161 | ||
1162 | return data.ret; | |
7ac4f3a0 JK |
1163 | } |
1164 | ||
90a398bb | 1165 | int fsck_object(struct object *obj, void *data, unsigned long size, |
22410549 | 1166 | struct fsck_options *options) |
ba002f3b MK |
1167 | { |
1168 | if (!obj) | |
38370253 | 1169 | return report(options, NULL, OBJ_NONE, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck"); |
ba002f3b MK |
1170 | |
1171 | if (obj->type == OBJ_BLOB) | |
6da40b22 | 1172 | return fsck_blob(&obj->oid, data, size, options); |
ba002f3b | 1173 | if (obj->type == OBJ_TREE) |
b2f2039c | 1174 | return fsck_tree(&obj->oid, data, size, options); |
ba002f3b | 1175 | if (obj->type == OBJ_COMMIT) |
c5b4269b | 1176 | return fsck_commit(&obj->oid, data, size, options); |
ba002f3b | 1177 | if (obj->type == OBJ_TAG) |
103fb6d4 | 1178 | return fsck_tag(&obj->oid, data, size, options); |
ba002f3b | 1179 | |
38370253 JK |
1180 | return report(options, &obj->oid, obj->type, |
1181 | FSCK_MSG_UNKNOWN_TYPE, | |
1182 | "unknown type '%d' (internal fsck error)", | |
1183 | obj->type); | |
ba002f3b | 1184 | } |
d6ffc8d7 | 1185 | |
1cd772cc | 1186 | int fsck_error_function(struct fsck_options *o, |
5afc4b1d JK |
1187 | const struct object_id *oid, |
1188 | enum object_type object_type, | |
394d5d31 ÆAB |
1189 | enum fsck_msg_type msg_type, |
1190 | enum fsck_msg_id msg_id, | |
1191 | const char *message) | |
d6ffc8d7 | 1192 | { |
0282f4dc | 1193 | if (msg_type == FSCK_WARN) { |
5afc4b1d | 1194 | warning("object %s: %s", fsck_describe_object(o, oid), message); |
0282f4dc JS |
1195 | return 0; |
1196 | } | |
5afc4b1d | 1197 | error("object %s: %s", fsck_describe_object(o, oid), message); |
d6ffc8d7 MK |
1198 | return 1; |
1199 | } | |
159e7b08 JK |
1200 | |
1201 | int fsck_finish(struct fsck_options *options) | |
1202 | { | |
1203 | int ret = 0; | |
1204 | struct oidset_iter iter; | |
1205 | const struct object_id *oid; | |
1206 | ||
c15087d1 | 1207 | oidset_iter_init(&options->gitmodules_found, &iter); |
159e7b08 | 1208 | while ((oid = oidset_iter_next(&iter))) { |
159e7b08 JK |
1209 | enum object_type type; |
1210 | unsigned long size; | |
1211 | char *buf; | |
1212 | ||
c15087d1 | 1213 | if (oidset_contains(&options->gitmodules_done, oid)) |
159e7b08 JK |
1214 | continue; |
1215 | ||
7913f53b | 1216 | buf = read_object_file(oid, &type, &size); |
159e7b08 | 1217 | if (!buf) { |
b8b00f16 | 1218 | if (is_promisor_object(oid)) |
27387444 | 1219 | continue; |
38370253 | 1220 | ret |= report(options, |
b8b00f16 | 1221 | oid, OBJ_BLOB, |
159e7b08 JK |
1222 | FSCK_MSG_GITMODULES_MISSING, |
1223 | "unable to read .gitmodules blob"); | |
1224 | continue; | |
1225 | } | |
1226 | ||
1227 | if (type == OBJ_BLOB) | |
b8b00f16 | 1228 | ret |= fsck_blob(oid, buf, size, options); |
159e7b08 | 1229 | else |
38370253 | 1230 | ret |= report(options, |
b8b00f16 | 1231 | oid, type, |
159e7b08 JK |
1232 | FSCK_MSG_GITMODULES_BLOB, |
1233 | "non-blob found at .gitmodules"); | |
1234 | free(buf); | |
1235 | } | |
1236 | ||
1237 | ||
c15087d1 ÆAB |
1238 | oidset_clear(&options->gitmodules_found); |
1239 | oidset_clear(&options->gitmodules_done); | |
159e7b08 JK |
1240 | return ret; |
1241 | } | |
1f3299fd | 1242 | |
fb79f5bf | 1243 | int git_fsck_config(const char *var, const char *value, void *cb) |
1f3299fd | 1244 | { |
fb79f5bf | 1245 | struct fsck_options *options = cb; |
1f3299fd ÆAB |
1246 | if (strcmp(var, "fsck.skiplist") == 0) { |
1247 | const char *path; | |
1248 | struct strbuf sb = STRBUF_INIT; | |
1249 | ||
1250 | if (git_config_pathname(&path, var, value)) | |
1251 | return 1; | |
1252 | strbuf_addf(&sb, "skiplist=%s", path); | |
1253 | free((char *)path); | |
1254 | fsck_set_msg_types(options, sb.buf); | |
1255 | strbuf_release(&sb); | |
1256 | return 0; | |
1257 | } | |
1258 | ||
1259 | if (skip_prefix(var, "fsck.", &var)) { | |
1260 | fsck_set_msg_type(options, var, value); | |
1261 | return 0; | |
1262 | } | |
1263 | ||
1264 | return git_default_config(var, value, cb); | |
1265 | } | |
3745e269 ÆAB |
1266 | |
1267 | /* | |
1268 | * Custom error callbacks that are used in more than one place. | |
1269 | */ | |
1270 | ||
1271 | int fsck_error_cb_print_missing_gitmodules(struct fsck_options *o, | |
1272 | const struct object_id *oid, | |
1273 | enum object_type object_type, | |
1274 | enum fsck_msg_type msg_type, | |
1275 | enum fsck_msg_id msg_id, | |
1276 | const char *message) | |
1277 | { | |
1278 | if (msg_id == FSCK_MSG_GITMODULES_MISSING) { | |
1279 | puts(oid_to_hex(oid)); | |
1280 | return 0; | |
1281 | } | |
1282 | return fsck_error_function(o, oid, object_type, msg_type, msg_id, message); | |
1283 | } |