Git 2.21.2
[git/debian.git] / fsck.c
blob6e5b3af6e8ba15cdc6e1480305e06f883e5c414e
1 #include "cache.h"
2 #include "object-store.h"
3 #include "repository.h"
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"
11 #include "refs.h"
12 #include "utf8.h"
13 #include "decorate.h"
14 #include "oidset.h"
15 #include "packfile.h"
16 #include "submodule-config.h"
17 #include "config.h"
18 #include "credential.h"
19 #include "help.h"
21 static struct oidset gitmodules_found = OIDSET_INIT;
22 static struct oidset gitmodules_done = OIDSET_INIT;
24 #define FSCK_FATAL -1
25 #define FSCK_INFO -2
27 #define FOREACH_MSG_ID(FUNC) \
28 /* fatal errors */ \
29 FUNC(NUL_IN_HEADER, FATAL) \
30 FUNC(UNTERMINATED_HEADER, FATAL) \
31 /* errors */ \
32 FUNC(BAD_DATE, ERROR) \
33 FUNC(BAD_DATE_OVERFLOW, ERROR) \
34 FUNC(BAD_EMAIL, ERROR) \
35 FUNC(BAD_NAME, ERROR) \
36 FUNC(BAD_OBJECT_SHA1, ERROR) \
37 FUNC(BAD_PARENT_SHA1, ERROR) \
38 FUNC(BAD_TAG_OBJECT, ERROR) \
39 FUNC(BAD_TIMEZONE, ERROR) \
40 FUNC(BAD_TREE, ERROR) \
41 FUNC(BAD_TREE_SHA1, ERROR) \
42 FUNC(BAD_TYPE, ERROR) \
43 FUNC(DUPLICATE_ENTRIES, ERROR) \
44 FUNC(MISSING_AUTHOR, ERROR) \
45 FUNC(MISSING_COMMITTER, ERROR) \
46 FUNC(MISSING_EMAIL, ERROR) \
47 FUNC(MISSING_GRAFT, ERROR) \
48 FUNC(MISSING_NAME_BEFORE_EMAIL, ERROR) \
49 FUNC(MISSING_OBJECT, ERROR) \
50 FUNC(MISSING_PARENT, ERROR) \
51 FUNC(MISSING_SPACE_BEFORE_DATE, ERROR) \
52 FUNC(MISSING_SPACE_BEFORE_EMAIL, ERROR) \
53 FUNC(MISSING_TAG, ERROR) \
54 FUNC(MISSING_TAG_ENTRY, ERROR) \
55 FUNC(MISSING_TAG_OBJECT, ERROR) \
56 FUNC(MISSING_TREE, ERROR) \
57 FUNC(MISSING_TREE_OBJECT, ERROR) \
58 FUNC(MISSING_TYPE, ERROR) \
59 FUNC(MISSING_TYPE_ENTRY, ERROR) \
60 FUNC(MULTIPLE_AUTHORS, ERROR) \
61 FUNC(TAG_OBJECT_NOT_TAG, ERROR) \
62 FUNC(TREE_NOT_SORTED, ERROR) \
63 FUNC(UNKNOWN_TYPE, ERROR) \
64 FUNC(ZERO_PADDED_DATE, ERROR) \
65 FUNC(GITMODULES_MISSING, ERROR) \
66 FUNC(GITMODULES_BLOB, ERROR) \
67 FUNC(GITMODULES_LARGE, ERROR) \
68 FUNC(GITMODULES_NAME, ERROR) \
69 FUNC(GITMODULES_SYMLINK, ERROR) \
70 FUNC(GITMODULES_URL, ERROR) \
71 FUNC(GITMODULES_PATH, ERROR) \
72 FUNC(GITMODULES_UPDATE, ERROR) \
73 /* warnings */ \
74 FUNC(BAD_FILEMODE, WARN) \
75 FUNC(EMPTY_NAME, WARN) \
76 FUNC(FULL_PATHNAME, WARN) \
77 FUNC(HAS_DOT, WARN) \
78 FUNC(HAS_DOTDOT, WARN) \
79 FUNC(HAS_DOTGIT, WARN) \
80 FUNC(NULL_SHA1, WARN) \
81 FUNC(ZERO_PADDED_FILEMODE, WARN) \
82 FUNC(NUL_IN_COMMIT, WARN) \
83 /* infos (reported as warnings, but ignored by default) */ \
84 FUNC(GITMODULES_PARSE, INFO) \
85 FUNC(BAD_TAG_NAME, INFO) \
86 FUNC(MISSING_TAGGER_ENTRY, INFO)
88 #define MSG_ID(id, msg_type) FSCK_MSG_##id,
89 enum fsck_msg_id {
90 FOREACH_MSG_ID(MSG_ID)
91 FSCK_MSG_MAX
93 #undef MSG_ID
95 #define STR(x) #x
96 #define MSG_ID(id, msg_type) { STR(id), NULL, NULL, FSCK_##msg_type },
97 static struct {
98 const char *id_string;
99 const char *downcased;
100 const char *camelcased;
101 int msg_type;
102 } msg_id_info[FSCK_MSG_MAX + 1] = {
103 FOREACH_MSG_ID(MSG_ID)
104 { NULL, NULL, NULL, -1 }
106 #undef MSG_ID
108 static void prepare_msg_ids(void)
110 int i;
112 if (msg_id_info[0].downcased)
113 return;
115 /* convert id_string to lower case, without underscores. */
116 for (i = 0; i < FSCK_MSG_MAX; i++) {
117 const char *p = msg_id_info[i].id_string;
118 int len = strlen(p);
119 char *q = xmalloc(len);
121 msg_id_info[i].downcased = q;
122 while (*p)
123 if (*p == '_')
124 p++;
125 else
126 *(q)++ = tolower(*(p)++);
127 *q = '\0';
129 p = msg_id_info[i].id_string;
130 q = xmalloc(len);
131 msg_id_info[i].camelcased = q;
132 while (*p) {
133 if (*p == '_') {
134 p++;
135 if (*p)
136 *q++ = *p++;
137 } else {
138 *q++ = tolower(*p++);
141 *q = '\0';
145 static int parse_msg_id(const char *text)
147 int i;
149 prepare_msg_ids();
151 for (i = 0; i < FSCK_MSG_MAX; i++)
152 if (!strcmp(text, msg_id_info[i].downcased))
153 return i;
155 return -1;
158 void list_config_fsck_msg_ids(struct string_list *list, const char *prefix)
160 int i;
162 prepare_msg_ids();
164 for (i = 0; i < FSCK_MSG_MAX; i++)
165 list_config_item(list, prefix, msg_id_info[i].camelcased);
168 static int fsck_msg_type(enum fsck_msg_id msg_id,
169 struct fsck_options *options)
171 int msg_type;
173 assert(msg_id >= 0 && msg_id < FSCK_MSG_MAX);
175 if (options->msg_type)
176 msg_type = options->msg_type[msg_id];
177 else {
178 msg_type = msg_id_info[msg_id].msg_type;
179 if (options->strict && msg_type == FSCK_WARN)
180 msg_type = FSCK_ERROR;
183 return msg_type;
186 static void init_skiplist(struct fsck_options *options, const char *path)
188 FILE *fp;
189 struct strbuf sb = STRBUF_INIT;
190 struct object_id oid;
192 fp = fopen(path, "r");
193 if (!fp)
194 die("Could not open skip list: %s", path);
195 while (!strbuf_getline(&sb, fp)) {
196 const char *p;
197 const char *hash;
200 * Allow trailing comments, leading whitespace
201 * (including before commits), and empty or whitespace
202 * only lines.
204 hash = strchr(sb.buf, '#');
205 if (hash)
206 strbuf_setlen(&sb, hash - sb.buf);
207 strbuf_trim(&sb);
208 if (!sb.len)
209 continue;
211 if (parse_oid_hex(sb.buf, &oid, &p) || *p != '\0')
212 die("Invalid SHA-1: %s", sb.buf);
213 oidset_insert(&options->skiplist, &oid);
215 if (ferror(fp))
216 die_errno("Could not read '%s'", path);
217 fclose(fp);
218 strbuf_release(&sb);
221 static int parse_msg_type(const char *str)
223 if (!strcmp(str, "error"))
224 return FSCK_ERROR;
225 else if (!strcmp(str, "warn"))
226 return FSCK_WARN;
227 else if (!strcmp(str, "ignore"))
228 return FSCK_IGNORE;
229 else
230 die("Unknown fsck message type: '%s'", str);
233 int is_valid_msg_type(const char *msg_id, const char *msg_type)
235 if (parse_msg_id(msg_id) < 0)
236 return 0;
237 parse_msg_type(msg_type);
238 return 1;
241 void fsck_set_msg_type(struct fsck_options *options,
242 const char *msg_id, const char *msg_type)
244 int id = parse_msg_id(msg_id), type;
246 if (id < 0)
247 die("Unhandled message id: %s", msg_id);
248 type = parse_msg_type(msg_type);
250 if (type != FSCK_ERROR && msg_id_info[id].msg_type == FSCK_FATAL)
251 die("Cannot demote %s to %s", msg_id, msg_type);
253 if (!options->msg_type) {
254 int i;
255 int *msg_type;
256 ALLOC_ARRAY(msg_type, FSCK_MSG_MAX);
257 for (i = 0; i < FSCK_MSG_MAX; i++)
258 msg_type[i] = fsck_msg_type(i, options);
259 options->msg_type = msg_type;
262 options->msg_type[id] = type;
265 void fsck_set_msg_types(struct fsck_options *options, const char *values)
267 char *buf = xstrdup(values), *to_free = buf;
268 int done = 0;
270 while (!done) {
271 int len = strcspn(buf, " ,|"), equal;
273 done = !buf[len];
274 if (!len) {
275 buf++;
276 continue;
278 buf[len] = '\0';
280 for (equal = 0;
281 equal < len && buf[equal] != '=' && buf[equal] != ':';
282 equal++)
283 buf[equal] = tolower(buf[equal]);
284 buf[equal] = '\0';
286 if (!strcmp(buf, "skiplist")) {
287 if (equal == len)
288 die("skiplist requires a path");
289 init_skiplist(options, buf + equal + 1);
290 buf += len + 1;
291 continue;
294 if (equal == len)
295 die("Missing '=': '%s'", buf);
297 fsck_set_msg_type(options, buf, buf + equal + 1);
298 buf += len + 1;
300 free(to_free);
303 static void append_msg_id(struct strbuf *sb, const char *msg_id)
305 for (;;) {
306 char c = *(msg_id)++;
308 if (!c)
309 break;
310 if (c != '_')
311 strbuf_addch(sb, tolower(c));
312 else {
313 assert(*msg_id);
314 strbuf_addch(sb, *(msg_id)++);
318 strbuf_addstr(sb, ": ");
321 static int object_on_skiplist(struct fsck_options *opts, struct object *obj)
323 return opts && obj && oidset_contains(&opts->skiplist, &obj->oid);
326 __attribute__((format (printf, 4, 5)))
327 static int report(struct fsck_options *options, struct object *object,
328 enum fsck_msg_id id, const char *fmt, ...)
330 va_list ap;
331 struct strbuf sb = STRBUF_INIT;
332 int msg_type = fsck_msg_type(id, options), result;
334 if (msg_type == FSCK_IGNORE)
335 return 0;
337 if (object_on_skiplist(options, object))
338 return 0;
340 if (msg_type == FSCK_FATAL)
341 msg_type = FSCK_ERROR;
342 else if (msg_type == FSCK_INFO)
343 msg_type = FSCK_WARN;
345 append_msg_id(&sb, msg_id_info[id].id_string);
347 va_start(ap, fmt);
348 strbuf_vaddf(&sb, fmt, ap);
349 result = options->error_func(options, object, msg_type, sb.buf);
350 strbuf_release(&sb);
351 va_end(ap);
353 return result;
356 static char *get_object_name(struct fsck_options *options, struct object *obj)
358 if (!options->object_names)
359 return NULL;
360 return lookup_decoration(options->object_names, obj);
363 static void put_object_name(struct fsck_options *options, struct object *obj,
364 const char *fmt, ...)
366 va_list ap;
367 struct strbuf buf = STRBUF_INIT;
368 char *existing;
370 if (!options->object_names)
371 return;
372 existing = lookup_decoration(options->object_names, obj);
373 if (existing)
374 return;
375 va_start(ap, fmt);
376 strbuf_vaddf(&buf, fmt, ap);
377 add_decoration(options->object_names, obj, strbuf_detach(&buf, NULL));
378 va_end(ap);
381 static const char *describe_object(struct fsck_options *o, struct object *obj)
383 static struct strbuf buf = STRBUF_INIT;
384 char *name;
386 strbuf_reset(&buf);
387 strbuf_addstr(&buf, oid_to_hex(&obj->oid));
388 if (o->object_names && (name = lookup_decoration(o->object_names, obj)))
389 strbuf_addf(&buf, " (%s)", name);
391 return buf.buf;
394 static int fsck_walk_tree(struct tree *tree, void *data, struct fsck_options *options)
396 struct tree_desc desc;
397 struct name_entry entry;
398 int res = 0;
399 const char *name;
401 if (parse_tree(tree))
402 return -1;
404 name = get_object_name(options, &tree->object);
405 if (init_tree_desc_gently(&desc, tree->buffer, tree->size))
406 return -1;
407 while (tree_entry_gently(&desc, &entry)) {
408 struct object *obj;
409 int result;
411 if (S_ISGITLINK(entry.mode))
412 continue;
414 if (S_ISDIR(entry.mode)) {
415 obj = (struct object *)lookup_tree(the_repository, &entry.oid);
416 if (name && obj)
417 put_object_name(options, obj, "%s%s/", name,
418 entry.path);
419 result = options->walk(obj, OBJ_TREE, data, options);
421 else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode)) {
422 obj = (struct object *)lookup_blob(the_repository, &entry.oid);
423 if (name && obj)
424 put_object_name(options, obj, "%s%s", name,
425 entry.path);
426 result = options->walk(obj, OBJ_BLOB, data, options);
428 else {
429 result = error("in tree %s: entry %s has bad mode %.6o",
430 describe_object(options, &tree->object), entry.path, entry.mode);
432 if (result < 0)
433 return result;
434 if (!res)
435 res = result;
437 return res;
440 static int fsck_walk_commit(struct commit *commit, void *data, struct fsck_options *options)
442 int counter = 0, generation = 0, name_prefix_len = 0;
443 struct commit_list *parents;
444 int res;
445 int result;
446 const char *name;
448 if (parse_commit(commit))
449 return -1;
451 name = get_object_name(options, &commit->object);
452 if (name)
453 put_object_name(options, &get_commit_tree(commit)->object,
454 "%s:", name);
456 result = options->walk((struct object *)get_commit_tree(commit),
457 OBJ_TREE, data, options);
458 if (result < 0)
459 return result;
460 res = result;
462 parents = commit->parents;
463 if (name && parents) {
464 int len = strlen(name), power;
466 if (len && name[len - 1] == '^') {
467 generation = 1;
468 name_prefix_len = len - 1;
470 else { /* parse ~<generation> suffix */
471 for (generation = 0, power = 1;
472 len && isdigit(name[len - 1]);
473 power *= 10)
474 generation += power * (name[--len] - '0');
475 if (power > 1 && len && name[len - 1] == '~')
476 name_prefix_len = len - 1;
480 while (parents) {
481 if (name) {
482 struct object *obj = &parents->item->object;
484 if (counter++)
485 put_object_name(options, obj, "%s^%d",
486 name, counter);
487 else if (generation > 0)
488 put_object_name(options, obj, "%.*s~%d",
489 name_prefix_len, name, generation + 1);
490 else
491 put_object_name(options, obj, "%s^", name);
493 result = options->walk((struct object *)parents->item, OBJ_COMMIT, data, options);
494 if (result < 0)
495 return result;
496 if (!res)
497 res = result;
498 parents = parents->next;
500 return res;
503 static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *options)
505 char *name = get_object_name(options, &tag->object);
507 if (parse_tag(tag))
508 return -1;
509 if (name)
510 put_object_name(options, tag->tagged, "%s", name);
511 return options->walk(tag->tagged, OBJ_ANY, data, options);
514 int fsck_walk(struct object *obj, void *data, struct fsck_options *options)
516 if (!obj)
517 return -1;
519 if (obj->type == OBJ_NONE)
520 parse_object(the_repository, &obj->oid);
522 switch (obj->type) {
523 case OBJ_BLOB:
524 return 0;
525 case OBJ_TREE:
526 return fsck_walk_tree((struct tree *)obj, data, options);
527 case OBJ_COMMIT:
528 return fsck_walk_commit((struct commit *)obj, data, options);
529 case OBJ_TAG:
530 return fsck_walk_tag((struct tag *)obj, data, options);
531 default:
532 error("Unknown object type for %s", describe_object(options, obj));
533 return -1;
538 * The entries in a tree are ordered in the _path_ order,
539 * which means that a directory entry is ordered by adding
540 * a slash to the end of it.
542 * So a directory called "a" is ordered _after_ a file
543 * called "a.c", because "a/" sorts after "a.c".
545 #define TREE_UNORDERED (-1)
546 #define TREE_HAS_DUPS (-2)
548 static int verify_ordered(unsigned mode1, const char *name1, unsigned mode2, const char *name2)
550 int len1 = strlen(name1);
551 int len2 = strlen(name2);
552 int len = len1 < len2 ? len1 : len2;
553 unsigned char c1, c2;
554 int cmp;
556 cmp = memcmp(name1, name2, len);
557 if (cmp < 0)
558 return 0;
559 if (cmp > 0)
560 return TREE_UNORDERED;
563 * Ok, the first <len> characters are the same.
564 * Now we need to order the next one, but turn
565 * a '\0' into a '/' for a directory entry.
567 c1 = name1[len];
568 c2 = name2[len];
569 if (!c1 && !c2)
571 * git-write-tree used to write out a nonsense tree that has
572 * entries with the same name, one blob and one tree. Make
573 * sure we do not have duplicate entries.
575 return TREE_HAS_DUPS;
576 if (!c1 && S_ISDIR(mode1))
577 c1 = '/';
578 if (!c2 && S_ISDIR(mode2))
579 c2 = '/';
580 return c1 < c2 ? 0 : TREE_UNORDERED;
583 static int fsck_tree(struct tree *item, struct fsck_options *options)
585 int retval = 0;
586 int has_null_sha1 = 0;
587 int has_full_path = 0;
588 int has_empty_name = 0;
589 int has_dot = 0;
590 int has_dotdot = 0;
591 int has_dotgit = 0;
592 int has_zero_pad = 0;
593 int has_bad_modes = 0;
594 int has_dup_entries = 0;
595 int not_properly_sorted = 0;
596 struct tree_desc desc;
597 unsigned o_mode;
598 const char *o_name;
600 if (init_tree_desc_gently(&desc, item->buffer, item->size)) {
601 retval += report(options, &item->object, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree");
602 return retval;
605 o_mode = 0;
606 o_name = NULL;
608 while (desc.size) {
609 unsigned mode;
610 const char *name, *backslash;
611 const struct object_id *oid;
613 oid = tree_entry_extract(&desc, &name, &mode);
615 has_null_sha1 |= is_null_oid(oid);
616 has_full_path |= !!strchr(name, '/');
617 has_empty_name |= !*name;
618 has_dot |= !strcmp(name, ".");
619 has_dotdot |= !strcmp(name, "..");
620 has_dotgit |= is_hfs_dotgit(name) || is_ntfs_dotgit(name);
621 has_zero_pad |= *(char *)desc.buffer == '0';
623 if (is_hfs_dotgitmodules(name) || is_ntfs_dotgitmodules(name)) {
624 if (!S_ISLNK(mode))
625 oidset_insert(&gitmodules_found, oid);
626 else
627 retval += report(options, &item->object,
628 FSCK_MSG_GITMODULES_SYMLINK,
629 ".gitmodules is a symbolic link");
632 if ((backslash = strchr(name, '\\'))) {
633 while (backslash) {
634 backslash++;
635 has_dotgit |= is_ntfs_dotgit(backslash);
636 if (is_ntfs_dotgitmodules(backslash)) {
637 if (!S_ISLNK(mode))
638 oidset_insert(&gitmodules_found, oid);
639 else
640 retval += report(options, &item->object,
641 FSCK_MSG_GITMODULES_SYMLINK,
642 ".gitmodules is a symbolic link");
644 backslash = strchr(backslash, '\\');
648 if (update_tree_entry_gently(&desc)) {
649 retval += report(options, &item->object, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree");
650 break;
653 switch (mode) {
655 * Standard modes..
657 case S_IFREG | 0755:
658 case S_IFREG | 0644:
659 case S_IFLNK:
660 case S_IFDIR:
661 case S_IFGITLINK:
662 break;
664 * This is nonstandard, but we had a few of these
665 * early on when we honored the full set of mode
666 * bits..
668 case S_IFREG | 0664:
669 if (!options->strict)
670 break;
671 /* fallthrough */
672 default:
673 has_bad_modes = 1;
676 if (o_name) {
677 switch (verify_ordered(o_mode, o_name, mode, name)) {
678 case TREE_UNORDERED:
679 not_properly_sorted = 1;
680 break;
681 case TREE_HAS_DUPS:
682 has_dup_entries = 1;
683 break;
684 default:
685 break;
689 o_mode = mode;
690 o_name = name;
693 if (has_null_sha1)
694 retval += report(options, &item->object, FSCK_MSG_NULL_SHA1, "contains entries pointing to null sha1");
695 if (has_full_path)
696 retval += report(options, &item->object, FSCK_MSG_FULL_PATHNAME, "contains full pathnames");
697 if (has_empty_name)
698 retval += report(options, &item->object, FSCK_MSG_EMPTY_NAME, "contains empty pathname");
699 if (has_dot)
700 retval += report(options, &item->object, FSCK_MSG_HAS_DOT, "contains '.'");
701 if (has_dotdot)
702 retval += report(options, &item->object, FSCK_MSG_HAS_DOTDOT, "contains '..'");
703 if (has_dotgit)
704 retval += report(options, &item->object, FSCK_MSG_HAS_DOTGIT, "contains '.git'");
705 if (has_zero_pad)
706 retval += report(options, &item->object, FSCK_MSG_ZERO_PADDED_FILEMODE, "contains zero-padded file modes");
707 if (has_bad_modes)
708 retval += report(options, &item->object, FSCK_MSG_BAD_FILEMODE, "contains bad file modes");
709 if (has_dup_entries)
710 retval += report(options, &item->object, FSCK_MSG_DUPLICATE_ENTRIES, "contains duplicate file entries");
711 if (not_properly_sorted)
712 retval += report(options, &item->object, FSCK_MSG_TREE_NOT_SORTED, "not properly sorted");
713 return retval;
716 static int verify_headers(const void *data, unsigned long size,
717 struct object *obj, struct fsck_options *options)
719 const char *buffer = (const char *)data;
720 unsigned long i;
722 for (i = 0; i < size; i++) {
723 switch (buffer[i]) {
724 case '\0':
725 return report(options, obj,
726 FSCK_MSG_NUL_IN_HEADER,
727 "unterminated header: NUL at offset %ld", i);
728 case '\n':
729 if (i + 1 < size && buffer[i + 1] == '\n')
730 return 0;
735 * We did not find double-LF that separates the header
736 * and the body. Not having a body is not a crime but
737 * we do want to see the terminating LF for the last header
738 * line.
740 if (size && buffer[size - 1] == '\n')
741 return 0;
743 return report(options, obj,
744 FSCK_MSG_UNTERMINATED_HEADER, "unterminated header");
747 static int fsck_ident(const char **ident, struct object *obj, struct fsck_options *options)
749 const char *p = *ident;
750 char *end;
752 *ident = strchrnul(*ident, '\n');
753 if (**ident == '\n')
754 (*ident)++;
756 if (*p == '<')
757 return report(options, obj, FSCK_MSG_MISSING_NAME_BEFORE_EMAIL, "invalid author/committer line - missing space before email");
758 p += strcspn(p, "<>\n");
759 if (*p == '>')
760 return report(options, obj, FSCK_MSG_BAD_NAME, "invalid author/committer line - bad name");
761 if (*p != '<')
762 return report(options, obj, FSCK_MSG_MISSING_EMAIL, "invalid author/committer line - missing email");
763 if (p[-1] != ' ')
764 return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_EMAIL, "invalid author/committer line - missing space before email");
765 p++;
766 p += strcspn(p, "<>\n");
767 if (*p != '>')
768 return report(options, obj, FSCK_MSG_BAD_EMAIL, "invalid author/committer line - bad email");
769 p++;
770 if (*p != ' ')
771 return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_DATE, "invalid author/committer line - missing space before date");
772 p++;
773 if (*p == '0' && p[1] != ' ')
774 return report(options, obj, FSCK_MSG_ZERO_PADDED_DATE, "invalid author/committer line - zero-padded date");
775 if (date_overflows(parse_timestamp(p, &end, 10)))
776 return report(options, obj, FSCK_MSG_BAD_DATE_OVERFLOW, "invalid author/committer line - date causes integer overflow");
777 if ((end == p || *end != ' '))
778 return report(options, obj, FSCK_MSG_BAD_DATE, "invalid author/committer line - bad date");
779 p = end + 1;
780 if ((*p != '+' && *p != '-') ||
781 !isdigit(p[1]) ||
782 !isdigit(p[2]) ||
783 !isdigit(p[3]) ||
784 !isdigit(p[4]) ||
785 (p[5] != '\n'))
786 return report(options, obj, FSCK_MSG_BAD_TIMEZONE, "invalid author/committer line - bad time zone");
787 p += 6;
788 return 0;
791 static int fsck_commit_buffer(struct commit *commit, const char *buffer,
792 unsigned long size, struct fsck_options *options)
794 struct object_id tree_oid, oid;
795 struct commit_graft *graft;
796 unsigned parent_count, parent_line_count = 0, author_count;
797 int err;
798 const char *buffer_begin = buffer;
799 const char *p;
801 if (verify_headers(buffer, size, &commit->object, options))
802 return -1;
804 if (!skip_prefix(buffer, "tree ", &buffer))
805 return report(options, &commit->object, FSCK_MSG_MISSING_TREE, "invalid format - expected 'tree' line");
806 if (parse_oid_hex(buffer, &tree_oid, &p) || *p != '\n') {
807 err = report(options, &commit->object, FSCK_MSG_BAD_TREE_SHA1, "invalid 'tree' line format - bad sha1");
808 if (err)
809 return err;
811 buffer = p + 1;
812 while (skip_prefix(buffer, "parent ", &buffer)) {
813 if (parse_oid_hex(buffer, &oid, &p) || *p != '\n') {
814 err = report(options, &commit->object, FSCK_MSG_BAD_PARENT_SHA1, "invalid 'parent' line format - bad sha1");
815 if (err)
816 return err;
818 buffer = p + 1;
819 parent_line_count++;
821 graft = lookup_commit_graft(the_repository, &commit->object.oid);
822 parent_count = commit_list_count(commit->parents);
823 if (graft) {
824 if (graft->nr_parent == -1 && !parent_count)
825 ; /* shallow commit */
826 else if (graft->nr_parent != parent_count) {
827 err = report(options, &commit->object, FSCK_MSG_MISSING_GRAFT, "graft objects missing");
828 if (err)
829 return err;
831 } else {
832 if (parent_count != parent_line_count) {
833 err = report(options, &commit->object, FSCK_MSG_MISSING_PARENT, "parent objects missing");
834 if (err)
835 return err;
838 author_count = 0;
839 while (skip_prefix(buffer, "author ", &buffer)) {
840 author_count++;
841 err = fsck_ident(&buffer, &commit->object, options);
842 if (err)
843 return err;
845 if (author_count < 1)
846 err = report(options, &commit->object, FSCK_MSG_MISSING_AUTHOR, "invalid format - expected 'author' line");
847 else if (author_count > 1)
848 err = report(options, &commit->object, FSCK_MSG_MULTIPLE_AUTHORS, "invalid format - multiple 'author' lines");
849 if (err)
850 return err;
851 if (!skip_prefix(buffer, "committer ", &buffer))
852 return report(options, &commit->object, FSCK_MSG_MISSING_COMMITTER, "invalid format - expected 'committer' line");
853 err = fsck_ident(&buffer, &commit->object, options);
854 if (err)
855 return err;
856 if (!get_commit_tree(commit)) {
857 err = report(options, &commit->object, FSCK_MSG_BAD_TREE, "could not load commit's tree %s", oid_to_hex(&tree_oid));
858 if (err)
859 return err;
861 if (memchr(buffer_begin, '\0', size)) {
862 err = report(options, &commit->object, FSCK_MSG_NUL_IN_COMMIT,
863 "NUL byte in the commit object body");
864 if (err)
865 return err;
867 return 0;
870 static int fsck_commit(struct commit *commit, const char *data,
871 unsigned long size, struct fsck_options *options)
873 const char *buffer = data ? data : get_commit_buffer(commit, &size);
874 int ret = fsck_commit_buffer(commit, buffer, size, options);
875 if (!data)
876 unuse_commit_buffer(commit, buffer);
877 return ret;
880 static int fsck_tag_buffer(struct tag *tag, const char *data,
881 unsigned long size, struct fsck_options *options)
883 struct object_id oid;
884 int ret = 0;
885 const char *buffer;
886 char *to_free = NULL, *eol;
887 struct strbuf sb = STRBUF_INIT;
888 const char *p;
890 if (data)
891 buffer = data;
892 else {
893 enum object_type type;
895 buffer = to_free =
896 read_object_file(&tag->object.oid, &type, &size);
897 if (!buffer)
898 return report(options, &tag->object,
899 FSCK_MSG_MISSING_TAG_OBJECT,
900 "cannot read tag object");
902 if (type != OBJ_TAG) {
903 ret = report(options, &tag->object,
904 FSCK_MSG_TAG_OBJECT_NOT_TAG,
905 "expected tag got %s",
906 type_name(type));
907 goto done;
911 ret = verify_headers(buffer, size, &tag->object, options);
912 if (ret)
913 goto done;
915 if (!skip_prefix(buffer, "object ", &buffer)) {
916 ret = report(options, &tag->object, FSCK_MSG_MISSING_OBJECT, "invalid format - expected 'object' line");
917 goto done;
919 if (parse_oid_hex(buffer, &oid, &p) || *p != '\n') {
920 ret = report(options, &tag->object, FSCK_MSG_BAD_OBJECT_SHA1, "invalid 'object' line format - bad sha1");
921 if (ret)
922 goto done;
924 buffer = p + 1;
926 if (!skip_prefix(buffer, "type ", &buffer)) {
927 ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE_ENTRY, "invalid format - expected 'type' line");
928 goto done;
930 eol = strchr(buffer, '\n');
931 if (!eol) {
932 ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE, "invalid format - unexpected end after 'type' line");
933 goto done;
935 if (type_from_string_gently(buffer, eol - buffer, 1) < 0)
936 ret = report(options, &tag->object, FSCK_MSG_BAD_TYPE, "invalid 'type' value");
937 if (ret)
938 goto done;
939 buffer = eol + 1;
941 if (!skip_prefix(buffer, "tag ", &buffer)) {
942 ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG_ENTRY, "invalid format - expected 'tag' line");
943 goto done;
945 eol = strchr(buffer, '\n');
946 if (!eol) {
947 ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG, "invalid format - unexpected end after 'type' line");
948 goto done;
950 strbuf_addf(&sb, "refs/tags/%.*s", (int)(eol - buffer), buffer);
951 if (check_refname_format(sb.buf, 0)) {
952 ret = report(options, &tag->object, FSCK_MSG_BAD_TAG_NAME,
953 "invalid 'tag' name: %.*s",
954 (int)(eol - buffer), buffer);
955 if (ret)
956 goto done;
958 buffer = eol + 1;
960 if (!skip_prefix(buffer, "tagger ", &buffer)) {
961 /* early tags do not contain 'tagger' lines; warn only */
962 ret = report(options, &tag->object, FSCK_MSG_MISSING_TAGGER_ENTRY, "invalid format - expected 'tagger' line");
963 if (ret)
964 goto done;
966 else
967 ret = fsck_ident(&buffer, &tag->object, options);
969 done:
970 strbuf_release(&sb);
971 free(to_free);
972 return ret;
975 static int fsck_tag(struct tag *tag, const char *data,
976 unsigned long size, struct fsck_options *options)
978 struct object *tagged = tag->tagged;
980 if (!tagged)
981 return report(options, &tag->object, FSCK_MSG_BAD_TAG_OBJECT, "could not load tagged object");
983 return fsck_tag_buffer(tag, data, size, options);
986 static int check_submodule_url(const char *url)
988 struct credential c = CREDENTIAL_INIT;
989 int ret;
991 if (looks_like_command_line_option(url))
992 return -1;
994 ret = credential_from_url_gently(&c, url, 1);
995 credential_clear(&c);
996 return ret;
999 struct fsck_gitmodules_data {
1000 struct object *obj;
1001 struct fsck_options *options;
1002 int ret;
1005 static int fsck_gitmodules_fn(const char *var, const char *value, void *vdata)
1007 struct fsck_gitmodules_data *data = vdata;
1008 const char *subsection, *key;
1009 int subsection_len;
1010 char *name;
1012 if (parse_config_key(var, "submodule", &subsection, &subsection_len, &key) < 0 ||
1013 !subsection)
1014 return 0;
1016 name = xmemdupz(subsection, subsection_len);
1017 if (check_submodule_name(name) < 0)
1018 data->ret |= report(data->options, data->obj,
1019 FSCK_MSG_GITMODULES_NAME,
1020 "disallowed submodule name: %s",
1021 name);
1022 if (!strcmp(key, "url") && value &&
1023 check_submodule_url(value) < 0)
1024 data->ret |= report(data->options, data->obj,
1025 FSCK_MSG_GITMODULES_URL,
1026 "disallowed submodule url: %s",
1027 value);
1028 if (!strcmp(key, "path") && value &&
1029 looks_like_command_line_option(value))
1030 data->ret |= report(data->options, data->obj,
1031 FSCK_MSG_GITMODULES_PATH,
1032 "disallowed submodule path: %s",
1033 value);
1034 if (!strcmp(key, "update") && value &&
1035 parse_submodule_update_type(value) == SM_UPDATE_COMMAND)
1036 data->ret |= report(data->options, data->obj,
1037 FSCK_MSG_GITMODULES_UPDATE,
1038 "disallowed submodule update setting: %s",
1039 value);
1040 free(name);
1042 return 0;
1045 static int fsck_blob(struct blob *blob, const char *buf,
1046 unsigned long size, struct fsck_options *options)
1048 struct fsck_gitmodules_data data;
1049 struct config_options config_opts = { 0 };
1051 if (!oidset_contains(&gitmodules_found, &blob->object.oid))
1052 return 0;
1053 oidset_insert(&gitmodules_done, &blob->object.oid);
1055 if (object_on_skiplist(options, &blob->object))
1056 return 0;
1058 if (!buf) {
1060 * A missing buffer here is a sign that the caller found the
1061 * blob too gigantic to load into memory. Let's just consider
1062 * that an error.
1064 return report(options, &blob->object,
1065 FSCK_MSG_GITMODULES_LARGE,
1066 ".gitmodules too large to parse");
1069 data.obj = &blob->object;
1070 data.options = options;
1071 data.ret = 0;
1072 config_opts.error_action = CONFIG_ERROR_SILENT;
1073 if (git_config_from_mem(fsck_gitmodules_fn, CONFIG_ORIGIN_BLOB,
1074 ".gitmodules", buf, size, &data, &config_opts))
1075 data.ret |= report(options, &blob->object,
1076 FSCK_MSG_GITMODULES_PARSE,
1077 "could not parse gitmodules blob");
1079 return data.ret;
1082 int fsck_object(struct object *obj, void *data, unsigned long size,
1083 struct fsck_options *options)
1085 if (!obj)
1086 return report(options, obj, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck");
1088 if (obj->type == OBJ_BLOB)
1089 return fsck_blob((struct blob *)obj, data, size, options);
1090 if (obj->type == OBJ_TREE)
1091 return fsck_tree((struct tree *) obj, options);
1092 if (obj->type == OBJ_COMMIT)
1093 return fsck_commit((struct commit *) obj, (const char *) data,
1094 size, options);
1095 if (obj->type == OBJ_TAG)
1096 return fsck_tag((struct tag *) obj, (const char *) data,
1097 size, options);
1099 return report(options, obj, FSCK_MSG_UNKNOWN_TYPE, "unknown type '%d' (internal fsck error)",
1100 obj->type);
1103 int fsck_error_function(struct fsck_options *o,
1104 struct object *obj, int msg_type, const char *message)
1106 if (msg_type == FSCK_WARN) {
1107 warning("object %s: %s", describe_object(o, obj), message);
1108 return 0;
1110 error("object %s: %s", describe_object(o, obj), message);
1111 return 1;
1114 int fsck_finish(struct fsck_options *options)
1116 int ret = 0;
1117 struct oidset_iter iter;
1118 const struct object_id *oid;
1120 oidset_iter_init(&gitmodules_found, &iter);
1121 while ((oid = oidset_iter_next(&iter))) {
1122 struct blob *blob;
1123 enum object_type type;
1124 unsigned long size;
1125 char *buf;
1127 if (oidset_contains(&gitmodules_done, oid))
1128 continue;
1130 blob = lookup_blob(the_repository, oid);
1131 if (!blob) {
1132 struct object *obj = lookup_unknown_object(oid->hash);
1133 ret |= report(options, obj,
1134 FSCK_MSG_GITMODULES_BLOB,
1135 "non-blob found at .gitmodules");
1136 continue;
1139 buf = read_object_file(oid, &type, &size);
1140 if (!buf) {
1141 if (is_promisor_object(&blob->object.oid))
1142 continue;
1143 ret |= report(options, &blob->object,
1144 FSCK_MSG_GITMODULES_MISSING,
1145 "unable to read .gitmodules blob");
1146 continue;
1149 if (type == OBJ_BLOB)
1150 ret |= fsck_blob(blob, buf, size, options);
1151 else
1152 ret |= report(options, &blob->object,
1153 FSCK_MSG_GITMODULES_BLOB,
1154 "non-blob found at .gitmodules");
1155 free(buf);
1159 oidset_clear(&gitmodules_found);
1160 oidset_clear(&gitmodules_done);
1161 return ret;