11 static int fsck_walk_tree(struct tree *tree, fsck_walk_func walk, void *data)
13 struct tree_desc desc;
14 struct name_entry entry;
20 init_tree_desc(&desc, tree->buffer, tree->size);
21 while (tree_entry(&desc, &entry)) {
24 if (S_ISGITLINK(entry.mode))
26 if (S_ISDIR(entry.mode))
27 result = walk(&lookup_tree(entry.sha1)->object, OBJ_TREE, data);
28 else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode))
29 result = walk(&lookup_blob(entry.sha1)->object, OBJ_BLOB, data);
31 result = error("in tree %s: entry %s has bad mode %.6o",
32 sha1_to_hex(tree->object.sha1), entry.path, entry.mode);
42 static int fsck_walk_commit(struct commit *commit, fsck_walk_func walk, void *data)
44 struct commit_list *parents;
48 if (parse_commit(commit))
51 result = walk((struct object *)commit->tree, OBJ_TREE, data);
56 parents = commit->parents;
58 result = walk((struct object *)parents->item, OBJ_COMMIT, data);
63 parents = parents->next;
68 static int fsck_walk_tag(struct tag *tag, fsck_walk_func walk, void *data)
72 return walk(tag->tagged, OBJ_ANY, data);
75 int fsck_walk(struct object *obj, fsck_walk_func walk, void *data)
83 return fsck_walk_tree((struct tree *)obj, walk, data);
85 return fsck_walk_commit((struct commit *)obj, walk, data);
87 return fsck_walk_tag((struct tag *)obj, walk, data);
89 error("Unknown object type for %s", sha1_to_hex(obj->sha1));
95 * The entries in a tree are ordered in the _path_ order,
96 * which means that a directory entry is ordered by adding
97 * a slash to the end of it.
99 * So a directory called "a" is ordered _after_ a file
100 * called "a.c", because "a/" sorts after "a.c".
102 #define TREE_UNORDERED (-1)
103 #define TREE_HAS_DUPS (-2)
105 static int verify_ordered(unsigned mode1, const char *name1, unsigned mode2, const char *name2)
107 int len1 = strlen(name1);
108 int len2 = strlen(name2);
109 int len = len1 < len2 ? len1 : len2;
110 unsigned char c1, c2;
113 cmp = memcmp(name1, name2, len);
117 return TREE_UNORDERED;
120 * Ok, the first <len> characters are the same.
121 * Now we need to order the next one, but turn
122 * a '\0' into a '/' for a directory entry.
128 * git-write-tree used to write out a nonsense tree that has
129 * entries with the same name, one blob and one tree. Make
130 * sure we do not have duplicate entries.
132 return TREE_HAS_DUPS;
133 if (!c1 && S_ISDIR(mode1))
135 if (!c2 && S_ISDIR(mode2))
137 return c1 < c2 ? 0 : TREE_UNORDERED;
140 static int fsck_tree(struct tree *item, int strict, fsck_error error_func)
143 int has_null_sha1 = 0;
144 int has_full_path = 0;
145 int has_empty_name = 0;
149 int has_zero_pad = 0;
150 int has_bad_modes = 0;
151 int has_dup_entries = 0;
152 int not_properly_sorted = 0;
153 struct tree_desc desc;
157 init_tree_desc(&desc, item->buffer, item->size);
165 const unsigned char *sha1;
167 sha1 = tree_entry_extract(&desc, &name, &mode);
169 if (is_null_sha1(sha1))
171 if (strchr(name, '/'))
175 if (!strcmp(name, "."))
177 if (!strcmp(name, ".."))
179 if (!strcasecmp(name, ".git") || is_hfs_dotgit(name) ||
180 is_ntfs_dotgit(name))
182 has_zero_pad |= *(char *)desc.buffer == '0';
183 update_tree_entry(&desc);
196 * This is nonstandard, but we had a few of these
197 * early on when we honored the full set of mode
208 switch (verify_ordered(o_mode, o_name, mode, name)) {
210 not_properly_sorted = 1;
226 retval += error_func(&item->object, FSCK_WARN, "contains entries pointing to null sha1");
228 retval += error_func(&item->object, FSCK_WARN, "contains full pathnames");
230 retval += error_func(&item->object, FSCK_WARN, "contains empty pathname");
232 retval += error_func(&item->object, FSCK_WARN, "contains '.'");
234 retval += error_func(&item->object, FSCK_WARN, "contains '..'");
236 retval += error_func(&item->object, FSCK_WARN, "contains '.git'");
238 retval += error_func(&item->object, FSCK_WARN, "contains zero-padded file modes");
240 retval += error_func(&item->object, FSCK_WARN, "contains bad file modes");
242 retval += error_func(&item->object, FSCK_ERROR, "contains duplicate file entries");
243 if (not_properly_sorted)
244 retval += error_func(&item->object, FSCK_ERROR, "not properly sorted");
248 static int fsck_ident(char **ident, struct object *obj, fsck_error error_func)
251 return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing space before email");
252 *ident += strcspn(*ident, "<>\n");
254 return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad name");
256 return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing email");
257 if ((*ident)[-1] != ' ')
258 return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing space before email");
260 *ident += strcspn(*ident, "<>\n");
262 return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad email");
265 return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing space before date");
267 if (**ident == '0' && (*ident)[1] != ' ')
268 return error_func(obj, FSCK_ERROR, "invalid author/committer line - zero-padded date");
269 *ident += strspn(*ident, "0123456789");
271 return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad date");
273 if ((**ident != '+' && **ident != '-') ||
274 !isdigit((*ident)[1]) ||
275 !isdigit((*ident)[2]) ||
276 !isdigit((*ident)[3]) ||
277 !isdigit((*ident)[4]) ||
278 ((*ident)[5] != '\n'))
279 return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad time zone");
284 static int fsck_commit(struct commit *commit, fsck_error error_func)
286 char *buffer = commit->buffer;
287 unsigned char tree_sha1[20], sha1[20];
288 struct commit_graft *graft;
292 if (commit->date == ULONG_MAX)
293 return error_func(&commit->object, FSCK_ERROR, "invalid author/committer line");
295 if (memcmp(buffer, "tree ", 5))
296 return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'tree' line");
297 if (get_sha1_hex(buffer+5, tree_sha1) || buffer[45] != '\n')
298 return error_func(&commit->object, FSCK_ERROR, "invalid 'tree' line format - bad sha1");
300 while (!memcmp(buffer, "parent ", 7)) {
301 if (get_sha1_hex(buffer+7, sha1) || buffer[47] != '\n')
302 return error_func(&commit->object, FSCK_ERROR, "invalid 'parent' line format - bad sha1");
306 graft = lookup_commit_graft(commit->object.sha1);
308 struct commit_list *p = commit->parents;
314 if (graft->nr_parent == -1 && !parents)
315 ; /* shallow commit */
316 else if (graft->nr_parent != parents)
317 return error_func(&commit->object, FSCK_ERROR, "graft objects missing");
319 struct commit_list *p = commit->parents;
320 while (p && parents) {
325 return error_func(&commit->object, FSCK_ERROR, "parent objects missing");
327 if (memcmp(buffer, "author ", 7))
328 return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'author' line");
330 err = fsck_ident(&buffer, &commit->object, error_func);
333 if (memcmp(buffer, "committer ", strlen("committer ")))
334 return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'committer' line");
335 buffer += strlen("committer ");
336 err = fsck_ident(&buffer, &commit->object, error_func);
340 return error_func(&commit->object, FSCK_ERROR, "could not load commit's tree %s", sha1_to_hex(tree_sha1));
345 static int fsck_tag(struct tag *tag, fsck_error error_func)
347 struct object *tagged = tag->tagged;
350 return error_func(&tag->object, FSCK_ERROR, "could not load tagged object");
354 int fsck_object(struct object *obj, int strict, fsck_error error_func)
357 return error_func(obj, FSCK_ERROR, "no valid object to fsck");
359 if (obj->type == OBJ_BLOB)
361 if (obj->type == OBJ_TREE)
362 return fsck_tree((struct tree *) obj, strict, error_func);
363 if (obj->type == OBJ_COMMIT)
364 return fsck_commit((struct commit *) obj, error_func);
365 if (obj->type == OBJ_TAG)
366 return fsck_tag((struct tag *) obj, error_func);
368 return error_func(obj, FSCK_ERROR, "unknown type '%d' (internal fsck error)",
372 int fsck_error_function(struct object *obj, int type, const char *fmt, ...)
375 struct strbuf sb = STRBUF_INIT;
377 strbuf_addf(&sb, "object %s:", sha1_to_hex(obj->sha1));
380 strbuf_vaddf(&sb, fmt, ap);