| #include "cache.h" |
| #include "object.h" |
| #include "blob.h" |
| #include "tree.h" |
| #include "tree-walk.h" |
| #include "commit.h" |
| #include "tag.h" |
| #include "fsck.h" |
| #include "refs.h" |
| #include "utf8.h" |
| #include "sha1-array.h" |
| #include "decorate.h" |
| #include "oidset.h" |
| #include "packfile.h" |
| #include "submodule-config.h" |
| #include "config.h" |
| |
| static struct oidset gitmodules_found = OIDSET_INIT; |
| static struct oidset gitmodules_done = OIDSET_INIT; |
| |
| #define FSCK_FATAL -1 |
| #define FSCK_INFO -2 |
| |
| #define FOREACH_MSG_ID(FUNC) \ |
| /* fatal errors */ \ |
| FUNC(NUL_IN_HEADER, FATAL) \ |
| FUNC(UNTERMINATED_HEADER, FATAL) \ |
| /* errors */ \ |
| FUNC(BAD_DATE, ERROR) \ |
| FUNC(BAD_DATE_OVERFLOW, ERROR) \ |
| FUNC(BAD_EMAIL, ERROR) \ |
| FUNC(BAD_NAME, ERROR) \ |
| FUNC(BAD_OBJECT_SHA1, ERROR) \ |
| FUNC(BAD_PARENT_SHA1, ERROR) \ |
| FUNC(BAD_TAG_OBJECT, ERROR) \ |
| FUNC(BAD_TIMEZONE, ERROR) \ |
| FUNC(BAD_TREE, ERROR) \ |
| FUNC(BAD_TREE_SHA1, ERROR) \ |
| FUNC(BAD_TYPE, ERROR) \ |
| FUNC(DUPLICATE_ENTRIES, ERROR) \ |
| FUNC(MISSING_AUTHOR, ERROR) \ |
| FUNC(MISSING_COMMITTER, ERROR) \ |
| FUNC(MISSING_EMAIL, ERROR) \ |
| FUNC(MISSING_GRAFT, ERROR) \ |
| FUNC(MISSING_NAME_BEFORE_EMAIL, ERROR) \ |
| FUNC(MISSING_OBJECT, ERROR) \ |
| FUNC(MISSING_PARENT, ERROR) \ |
| FUNC(MISSING_SPACE_BEFORE_DATE, ERROR) \ |
| FUNC(MISSING_SPACE_BEFORE_EMAIL, ERROR) \ |
| FUNC(MISSING_TAG, ERROR) \ |
| FUNC(MISSING_TAG_ENTRY, ERROR) \ |
| FUNC(MISSING_TAG_OBJECT, ERROR) \ |
| FUNC(MISSING_TREE, ERROR) \ |
| FUNC(MISSING_TREE_OBJECT, ERROR) \ |
| FUNC(MISSING_TYPE, ERROR) \ |
| FUNC(MISSING_TYPE_ENTRY, ERROR) \ |
| FUNC(MULTIPLE_AUTHORS, ERROR) \ |
| FUNC(TAG_OBJECT_NOT_TAG, ERROR) \ |
| FUNC(TREE_NOT_SORTED, ERROR) \ |
| FUNC(UNKNOWN_TYPE, ERROR) \ |
| FUNC(ZERO_PADDED_DATE, ERROR) \ |
| FUNC(GITMODULES_MISSING, ERROR) \ |
| FUNC(GITMODULES_BLOB, ERROR) \ |
| FUNC(GITMODULES_PARSE, ERROR) \ |
| FUNC(GITMODULES_NAME, ERROR) \ |
| FUNC(GITMODULES_SYMLINK, ERROR) \ |
| FUNC(GITMODULES_URL, ERROR) \ |
| FUNC(GITMODULES_PATH, ERROR) \ |
| FUNC(GITMODULES_UPDATE, ERROR) \ |
| /* warnings */ \ |
| FUNC(BAD_FILEMODE, WARN) \ |
| FUNC(EMPTY_NAME, WARN) \ |
| FUNC(FULL_PATHNAME, WARN) \ |
| FUNC(HAS_DOT, WARN) \ |
| FUNC(HAS_DOTDOT, WARN) \ |
| FUNC(HAS_DOTGIT, WARN) \ |
| FUNC(NULL_SHA1, WARN) \ |
| FUNC(ZERO_PADDED_FILEMODE, WARN) \ |
| FUNC(NUL_IN_COMMIT, WARN) \ |
| /* infos (reported as warnings, but ignored by default) */ \ |
| FUNC(BAD_TAG_NAME, INFO) \ |
| FUNC(MISSING_TAGGER_ENTRY, INFO) |
| |
| #define MSG_ID(id, msg_type) FSCK_MSG_##id, |
| enum fsck_msg_id { |
| FOREACH_MSG_ID(MSG_ID) |
| FSCK_MSG_MAX |
| }; |
| #undef MSG_ID |
| |
| #define STR(x) #x |
| #define MSG_ID(id, msg_type) { STR(id), NULL, FSCK_##msg_type }, |
| static struct { |
| const char *id_string; |
| const char *downcased; |
| int msg_type; |
| } msg_id_info[FSCK_MSG_MAX + 1] = { |
| FOREACH_MSG_ID(MSG_ID) |
| { NULL, NULL, -1 } |
| }; |
| #undef MSG_ID |
| |
| static int parse_msg_id(const char *text) |
| { |
| int i; |
| |
| if (!msg_id_info[0].downcased) { |
| /* convert id_string to lower case, without underscores. */ |
| for (i = 0; i < FSCK_MSG_MAX; i++) { |
| const char *p = msg_id_info[i].id_string; |
| int len = strlen(p); |
| char *q = xmalloc(len); |
| |
| msg_id_info[i].downcased = q; |
| while (*p) |
| if (*p == '_') |
| p++; |
| else |
| *(q)++ = tolower(*(p)++); |
| *q = '\0'; |
| } |
| } |
| |
| for (i = 0; i < FSCK_MSG_MAX; i++) |
| if (!strcmp(text, msg_id_info[i].downcased)) |
| return i; |
| |
| return -1; |
| } |
| |
| static int fsck_msg_type(enum fsck_msg_id msg_id, |
| struct fsck_options *options) |
| { |
| int msg_type; |
| |
| assert(msg_id >= 0 && msg_id < FSCK_MSG_MAX); |
| |
| if (options->msg_type) |
| msg_type = options->msg_type[msg_id]; |
| else { |
| msg_type = msg_id_info[msg_id].msg_type; |
| if (options->strict && msg_type == FSCK_WARN) |
| msg_type = FSCK_ERROR; |
| } |
| |
| return msg_type; |
| } |
| |
| static void init_skiplist(struct fsck_options *options, const char *path) |
| { |
| static struct oid_array skiplist = OID_ARRAY_INIT; |
| int sorted, fd; |
| char buffer[GIT_MAX_HEXSZ + 1]; |
| struct object_id oid; |
| |
| if (options->skiplist) |
| sorted = options->skiplist->sorted; |
| else { |
| sorted = 1; |
| options->skiplist = &skiplist; |
| } |
| |
| fd = open(path, O_RDONLY); |
| if (fd < 0) |
| die("Could not open skip list: %s", path); |
| for (;;) { |
| const char *p; |
| int result = read_in_full(fd, buffer, sizeof(buffer)); |
| if (result < 0) |
| die_errno("Could not read '%s'", path); |
| if (!result) |
| break; |
| if (parse_oid_hex(buffer, &oid, &p) || *p != '\n') |
| die("Invalid SHA-1: %s", buffer); |
| oid_array_append(&skiplist, &oid); |
| if (sorted && skiplist.nr > 1 && |
| oidcmp(&skiplist.oid[skiplist.nr - 2], |
| &oid) > 0) |
| sorted = 0; |
| } |
| close(fd); |
| |
| if (sorted) |
| skiplist.sorted = 1; |
| } |
| |
| static int parse_msg_type(const char *str) |
| { |
| if (!strcmp(str, "error")) |
| return FSCK_ERROR; |
| else if (!strcmp(str, "warn")) |
| return FSCK_WARN; |
| else if (!strcmp(str, "ignore")) |
| return FSCK_IGNORE; |
| else |
| die("Unknown fsck message type: '%s'", str); |
| } |
| |
| int is_valid_msg_type(const char *msg_id, const char *msg_type) |
| { |
| if (parse_msg_id(msg_id) < 0) |
| return 0; |
| parse_msg_type(msg_type); |
| return 1; |
| } |
| |
| void fsck_set_msg_type(struct fsck_options *options, |
| const char *msg_id, const char *msg_type) |
| { |
| int id = parse_msg_id(msg_id), type; |
| |
| if (id < 0) |
| die("Unhandled message id: %s", msg_id); |
| type = parse_msg_type(msg_type); |
| |
| if (type != FSCK_ERROR && msg_id_info[id].msg_type == FSCK_FATAL) |
| die("Cannot demote %s to %s", msg_id, msg_type); |
| |
| if (!options->msg_type) { |
| int i; |
| int *msg_type; |
| ALLOC_ARRAY(msg_type, FSCK_MSG_MAX); |
| for (i = 0; i < FSCK_MSG_MAX; i++) |
| msg_type[i] = fsck_msg_type(i, options); |
| options->msg_type = msg_type; |
| } |
| |
| options->msg_type[id] = type; |
| } |
| |
| void fsck_set_msg_types(struct fsck_options *options, const char *values) |
| { |
| char *buf = xstrdup(values), *to_free = buf; |
| int done = 0; |
| |
| while (!done) { |
| int len = strcspn(buf, " ,|"), equal; |
| |
| done = !buf[len]; |
| if (!len) { |
| buf++; |
| continue; |
| } |
| buf[len] = '\0'; |
| |
| for (equal = 0; |
| equal < len && buf[equal] != '=' && buf[equal] != ':'; |
| equal++) |
| buf[equal] = tolower(buf[equal]); |
| buf[equal] = '\0'; |
| |
| if (!strcmp(buf, "skiplist")) { |
| if (equal == len) |
| die("skiplist requires a path"); |
| init_skiplist(options, buf + equal + 1); |
| buf += len + 1; |
| continue; |
| } |
| |
| if (equal == len) |
| die("Missing '=': '%s'", buf); |
| |
| fsck_set_msg_type(options, buf, buf + equal + 1); |
| buf += len + 1; |
| } |
| free(to_free); |
| } |
| |
| static void append_msg_id(struct strbuf *sb, const char *msg_id) |
| { |
| for (;;) { |
| char c = *(msg_id)++; |
| |
| if (!c) |
| break; |
| if (c != '_') |
| strbuf_addch(sb, tolower(c)); |
| else { |
| assert(*msg_id); |
| strbuf_addch(sb, *(msg_id)++); |
| } |
| } |
| |
| strbuf_addstr(sb, ": "); |
| } |
| |
| __attribute__((format (printf, 4, 5))) |
| static int report(struct fsck_options *options, struct object *object, |
| enum fsck_msg_id id, const char *fmt, ...) |
| { |
| va_list ap; |
| struct strbuf sb = STRBUF_INIT; |
| int msg_type = fsck_msg_type(id, options), result; |
| |
| if (msg_type == FSCK_IGNORE) |
| return 0; |
| |
| if (options->skiplist && object && |
| oid_array_lookup(options->skiplist, &object->oid) >= 0) |
| return 0; |
| |
| if (msg_type == FSCK_FATAL) |
| msg_type = FSCK_ERROR; |
| else if (msg_type == FSCK_INFO) |
| msg_type = FSCK_WARN; |
| |
| append_msg_id(&sb, msg_id_info[id].id_string); |
| |
| va_start(ap, fmt); |
| strbuf_vaddf(&sb, fmt, ap); |
| result = options->error_func(options, object, msg_type, sb.buf); |
| strbuf_release(&sb); |
| va_end(ap); |
| |
| return result; |
| } |
| |
| static char *get_object_name(struct fsck_options *options, struct object *obj) |
| { |
| if (!options->object_names) |
| return NULL; |
| return lookup_decoration(options->object_names, obj); |
| } |
| |
| static void put_object_name(struct fsck_options *options, struct object *obj, |
| const char *fmt, ...) |
| { |
| va_list ap; |
| struct strbuf buf = STRBUF_INIT; |
| char *existing; |
| |
| if (!options->object_names) |
| return; |
| existing = lookup_decoration(options->object_names, obj); |
| if (existing) |
| return; |
| va_start(ap, fmt); |
| strbuf_vaddf(&buf, fmt, ap); |
| add_decoration(options->object_names, obj, strbuf_detach(&buf, NULL)); |
| va_end(ap); |
| } |
| |
| static const char *describe_object(struct fsck_options *o, struct object *obj) |
| { |
| static struct strbuf buf = STRBUF_INIT; |
| char *name; |
| |
| strbuf_reset(&buf); |
| strbuf_addstr(&buf, oid_to_hex(&obj->oid)); |
| if (o->object_names && (name = lookup_decoration(o->object_names, obj))) |
| strbuf_addf(&buf, " (%s)", name); |
| |
| return buf.buf; |
| } |
| |
| static int fsck_walk_tree(struct tree *tree, void *data, struct fsck_options *options) |
| { |
| struct tree_desc desc; |
| struct name_entry entry; |
| int res = 0; |
| const char *name; |
| |
| if (parse_tree(tree)) |
| return -1; |
| |
| name = get_object_name(options, &tree->object); |
| if (init_tree_desc_gently(&desc, tree->buffer, tree->size)) |
| return -1; |
| while (tree_entry_gently(&desc, &entry)) { |
| struct object *obj; |
| int result; |
| |
| if (S_ISGITLINK(entry.mode)) |
| continue; |
| |
| if (S_ISDIR(entry.mode)) { |
| obj = (struct object *)lookup_tree(entry.oid); |
| if (name && obj) |
| put_object_name(options, obj, "%s%s/", name, |
| entry.path); |
| result = options->walk(obj, OBJ_TREE, data, options); |
| } |
| else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode)) { |
| obj = (struct object *)lookup_blob(entry.oid); |
| if (name && obj) |
| put_object_name(options, obj, "%s%s", name, |
| entry.path); |
| result = options->walk(obj, OBJ_BLOB, data, options); |
| } |
| else { |
| result = error("in tree %s: entry %s has bad mode %.6o", |
| describe_object(options, &tree->object), entry.path, entry.mode); |
| } |
| if (result < 0) |
| return result; |
| if (!res) |
| res = result; |
| } |
| return res; |
| } |
| |
| static int fsck_walk_commit(struct commit *commit, void *data, struct fsck_options *options) |
| { |
| int counter = 0, generation = 0, name_prefix_len = 0; |
| struct commit_list *parents; |
| int res; |
| int result; |
| const char *name; |
| |
| if (parse_commit(commit)) |
| return -1; |
| |
| name = get_object_name(options, &commit->object); |
| if (name) |
| put_object_name(options, &commit->tree->object, "%s:", name); |
| |
| result = options->walk((struct object *)commit->tree, OBJ_TREE, data, options); |
| if (result < 0) |
| return result; |
| res = result; |
| |
| parents = commit->parents; |
| if (name && parents) { |
| int len = strlen(name), power; |
| |
| if (len && name[len - 1] == '^') { |
| generation = 1; |
| name_prefix_len = len - 1; |
| } |
| else { /* parse ~<generation> suffix */ |
| for (generation = 0, power = 1; |
| len && isdigit(name[len - 1]); |
| power *= 10) |
| generation += power * (name[--len] - '0'); |
| if (power > 1 && len && name[len - 1] == '~') |
| name_prefix_len = len - 1; |
| } |
| } |
| |
| while (parents) { |
| if (name) { |
| struct object *obj = &parents->item->object; |
| |
| if (++counter > 1) |
| put_object_name(options, obj, "%s^%d", |
| name, counter); |
| else if (generation > 0) |
| put_object_name(options, obj, "%.*s~%d", |
| name_prefix_len, name, generation + 1); |
| else |
| put_object_name(options, obj, "%s^", name); |
| } |
| result = options->walk((struct object *)parents->item, OBJ_COMMIT, data, options); |
| if (result < 0) |
| return result; |
| if (!res) |
| res = result; |
| parents = parents->next; |
| } |
| return res; |
| } |
| |
| static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *options) |
| { |
| char *name = get_object_name(options, &tag->object); |
| |
| if (parse_tag(tag)) |
| return -1; |
| if (name) |
| put_object_name(options, tag->tagged, "%s", name); |
| return options->walk(tag->tagged, OBJ_ANY, data, options); |
| } |
| |
| int fsck_walk(struct object *obj, void *data, struct fsck_options *options) |
| { |
| if (!obj) |
| return -1; |
| |
| if (obj->type == OBJ_NONE) |
| parse_object(&obj->oid); |
| |
| switch (obj->type) { |
| case OBJ_BLOB: |
| return 0; |
| case OBJ_TREE: |
| return fsck_walk_tree((struct tree *)obj, data, options); |
| case OBJ_COMMIT: |
| return fsck_walk_commit((struct commit *)obj, data, options); |
| case OBJ_TAG: |
| return fsck_walk_tag((struct tag *)obj, data, options); |
| default: |
| error("Unknown object type for %s", describe_object(options, obj)); |
| return -1; |
| } |
| } |
| |
| /* |
| * The entries in a tree are ordered in the _path_ order, |
| * which means that a directory entry is ordered by adding |
| * a slash to the end of it. |
| * |
| * So a directory called "a" is ordered _after_ a file |
| * called "a.c", because "a/" sorts after "a.c". |
| */ |
| #define TREE_UNORDERED (-1) |
| #define TREE_HAS_DUPS (-2) |
| |
| static int verify_ordered(unsigned mode1, const char *name1, unsigned mode2, const char *name2) |
| { |
| int len1 = strlen(name1); |
| int len2 = strlen(name2); |
| int len = len1 < len2 ? len1 : len2; |
| unsigned char c1, c2; |
| int cmp; |
| |
| cmp = memcmp(name1, name2, len); |
| if (cmp < 0) |
| return 0; |
| if (cmp > 0) |
| return TREE_UNORDERED; |
| |
| /* |
| * Ok, the first <len> characters are the same. |
| * Now we need to order the next one, but turn |
| * a '\0' into a '/' for a directory entry. |
| */ |
| c1 = name1[len]; |
| c2 = name2[len]; |
| if (!c1 && !c2) |
| /* |
| * git-write-tree used to write out a nonsense tree that has |
| * entries with the same name, one blob and one tree. Make |
| * sure we do not have duplicate entries. |
| */ |
| return TREE_HAS_DUPS; |
| if (!c1 && S_ISDIR(mode1)) |
| c1 = '/'; |
| if (!c2 && S_ISDIR(mode2)) |
| c2 = '/'; |
| return c1 < c2 ? 0 : TREE_UNORDERED; |
| } |
| |
| static int fsck_tree(struct tree *item, struct fsck_options *options) |
| { |
| int retval = 0; |
| int has_null_sha1 = 0; |
| int has_full_path = 0; |
| int has_empty_name = 0; |
| int has_dot = 0; |
| int has_dotdot = 0; |
| int has_dotgit = 0; |
| int has_zero_pad = 0; |
| int has_bad_modes = 0; |
| int has_dup_entries = 0; |
| int not_properly_sorted = 0; |
| struct tree_desc desc; |
| unsigned o_mode; |
| const char *o_name; |
| |
| if (init_tree_desc_gently(&desc, item->buffer, item->size)) { |
| retval += report(options, &item->object, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree"); |
| return retval; |
| } |
| |
| o_mode = 0; |
| o_name = NULL; |
| |
| while (desc.size) { |
| unsigned mode; |
| const char *name, *backslash; |
| const struct object_id *oid; |
| |
| oid = tree_entry_extract(&desc, &name, &mode); |
| |
| has_null_sha1 |= is_null_oid(oid); |
| has_full_path |= !!strchr(name, '/'); |
| has_empty_name |= !*name; |
| has_dot |= !strcmp(name, "."); |
| has_dotdot |= !strcmp(name, ".."); |
| has_dotgit |= is_hfs_dotgit(name) || is_ntfs_dotgit(name); |
| has_zero_pad |= *(char *)desc.buffer == '0'; |
| |
| if (is_hfs_dotgitmodules(name) || is_ntfs_dotgitmodules(name)) { |
| if (!S_ISLNK(mode)) |
| oidset_insert(&gitmodules_found, oid); |
| else |
| retval += report(options, &item->object, |
| FSCK_MSG_GITMODULES_SYMLINK, |
| ".gitmodules is a symbolic link"); |
| } |
| |
| if ((backslash = strchr(name, '\\'))) { |
| while (backslash) { |
| backslash++; |
| has_dotgit |= is_ntfs_dotgit(backslash); |
| if (is_ntfs_dotgitmodules(backslash)) { |
| if (!S_ISLNK(mode)) |
| oidset_insert(&gitmodules_found, oid); |
| else |
| retval += report(options, &item->object, |
| FSCK_MSG_GITMODULES_SYMLINK, |
| ".gitmodules is a symbolic link"); |
| } |
| backslash = strchr(backslash, '\\'); |
| } |
| } |
| |
| if (update_tree_entry_gently(&desc)) { |
| retval += report(options, &item->object, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree"); |
| break; |
| } |
| |
| switch (mode) { |
| /* |
| * Standard modes.. |
| */ |
| case S_IFREG | 0755: |
| case S_IFREG | 0644: |
| case S_IFLNK: |
| case S_IFDIR: |
| case S_IFGITLINK: |
| break; |
| /* |
| * This is nonstandard, but we had a few of these |
| * early on when we honored the full set of mode |
| * bits.. |
| */ |
| case S_IFREG | 0664: |
| if (!options->strict) |
| break; |
| /* fallthrough */ |
| default: |
| has_bad_modes = 1; |
| } |
| |
| if (o_name) { |
| switch (verify_ordered(o_mode, o_name, mode, name)) { |
| case TREE_UNORDERED: |
| not_properly_sorted = 1; |
| break; |
| case TREE_HAS_DUPS: |
| has_dup_entries = 1; |
| break; |
| default: |
| break; |
| } |
| } |
| |
| o_mode = mode; |
| o_name = name; |
| } |
| |
| if (has_null_sha1) |
| retval += report(options, &item->object, FSCK_MSG_NULL_SHA1, "contains entries pointing to null sha1"); |
| if (has_full_path) |
| retval += report(options, &item->object, FSCK_MSG_FULL_PATHNAME, "contains full pathnames"); |
| if (has_empty_name) |
| retval += report(options, &item->object, FSCK_MSG_EMPTY_NAME, "contains empty pathname"); |
| if (has_dot) |
| retval += report(options, &item->object, FSCK_MSG_HAS_DOT, "contains '.'"); |
| if (has_dotdot) |
| retval += report(options, &item->object, FSCK_MSG_HAS_DOTDOT, "contains '..'"); |
| if (has_dotgit) |
| retval += report(options, &item->object, FSCK_MSG_HAS_DOTGIT, "contains '.git'"); |
| if (has_zero_pad) |
| retval += report(options, &item->object, FSCK_MSG_ZERO_PADDED_FILEMODE, "contains zero-padded file modes"); |
| if (has_bad_modes) |
| retval += report(options, &item->object, FSCK_MSG_BAD_FILEMODE, "contains bad file modes"); |
| if (has_dup_entries) |
| retval += report(options, &item->object, FSCK_MSG_DUPLICATE_ENTRIES, "contains duplicate file entries"); |
| if (not_properly_sorted) |
| retval += report(options, &item->object, FSCK_MSG_TREE_NOT_SORTED, "not properly sorted"); |
| return retval; |
| } |
| |
| static int verify_headers(const void *data, unsigned long size, |
| struct object *obj, struct fsck_options *options) |
| { |
| const char *buffer = (const char *)data; |
| unsigned long i; |
| |
| for (i = 0; i < size; i++) { |
| switch (buffer[i]) { |
| case '\0': |
| return report(options, obj, |
| FSCK_MSG_NUL_IN_HEADER, |
| "unterminated header: NUL at offset %ld", i); |
| case '\n': |
| if (i + 1 < size && buffer[i + 1] == '\n') |
| return 0; |
| } |
| } |
| |
| /* |
| * We did not find double-LF that separates the header |
| * and the body. Not having a body is not a crime but |
| * we do want to see the terminating LF for the last header |
| * line. |
| */ |
| if (size && buffer[size - 1] == '\n') |
| return 0; |
| |
| return report(options, obj, |
| FSCK_MSG_UNTERMINATED_HEADER, "unterminated header"); |
| } |
| |
| static int fsck_ident(const char **ident, struct object *obj, struct fsck_options *options) |
| { |
| const char *p = *ident; |
| char *end; |
| |
| *ident = strchrnul(*ident, '\n'); |
| if (**ident == '\n') |
| (*ident)++; |
| |
| if (*p == '<') |
| return report(options, obj, FSCK_MSG_MISSING_NAME_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); |
| p += strcspn(p, "<>\n"); |
| if (*p == '>') |
| return report(options, obj, FSCK_MSG_BAD_NAME, "invalid author/committer line - bad name"); |
| if (*p != '<') |
| return report(options, obj, FSCK_MSG_MISSING_EMAIL, "invalid author/committer line - missing email"); |
| if (p[-1] != ' ') |
| return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_EMAIL, "invalid author/committer line - missing space before email"); |
| p++; |
| p += strcspn(p, "<>\n"); |
| if (*p != '>') |
| return report(options, obj, FSCK_MSG_BAD_EMAIL, "invalid author/committer line - bad email"); |
| p++; |
| if (*p != ' ') |
| return report(options, obj, FSCK_MSG_MISSING_SPACE_BEFORE_DATE, "invalid author/committer line - missing space before date"); |
| p++; |
| if (*p == '0' && p[1] != ' ') |
| return report(options, obj, FSCK_MSG_ZERO_PADDED_DATE, "invalid author/committer line - zero-padded date"); |
| if (date_overflows(parse_timestamp(p, &end, 10))) |
| return report(options, obj, FSCK_MSG_BAD_DATE_OVERFLOW, "invalid author/committer line - date causes integer overflow"); |
| if ((end == p || *end != ' ')) |
| return report(options, obj, FSCK_MSG_BAD_DATE, "invalid author/committer line - bad date"); |
| p = end + 1; |
| if ((*p != '+' && *p != '-') || |
| !isdigit(p[1]) || |
| !isdigit(p[2]) || |
| !isdigit(p[3]) || |
| !isdigit(p[4]) || |
| (p[5] != '\n')) |
| return report(options, obj, FSCK_MSG_BAD_TIMEZONE, "invalid author/committer line - bad time zone"); |
| p += 6; |
| return 0; |
| } |
| |
| static int fsck_commit_buffer(struct commit *commit, const char *buffer, |
| unsigned long size, struct fsck_options *options) |
| { |
| unsigned char tree_sha1[20], sha1[20]; |
| struct commit_graft *graft; |
| unsigned parent_count, parent_line_count = 0, author_count; |
| int err; |
| const char *buffer_begin = buffer; |
| |
| if (verify_headers(buffer, size, &commit->object, options)) |
| return -1; |
| |
| if (!skip_prefix(buffer, "tree ", &buffer)) |
| return report(options, &commit->object, FSCK_MSG_MISSING_TREE, "invalid format - expected 'tree' line"); |
| if (get_sha1_hex(buffer, tree_sha1) || buffer[40] != '\n') { |
| err = report(options, &commit->object, FSCK_MSG_BAD_TREE_SHA1, "invalid 'tree' line format - bad sha1"); |
| if (err) |
| return err; |
| } |
| buffer += 41; |
| while (skip_prefix(buffer, "parent ", &buffer)) { |
| if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') { |
| err = report(options, &commit->object, FSCK_MSG_BAD_PARENT_SHA1, "invalid 'parent' line format - bad sha1"); |
| if (err) |
| return err; |
| } |
| buffer += 41; |
| parent_line_count++; |
| } |
| graft = lookup_commit_graft(&commit->object.oid); |
| parent_count = commit_list_count(commit->parents); |
| if (graft) { |
| if (graft->nr_parent == -1 && !parent_count) |
| ; /* shallow commit */ |
| else if (graft->nr_parent != parent_count) { |
| err = report(options, &commit->object, FSCK_MSG_MISSING_GRAFT, "graft objects missing"); |
| if (err) |
| return err; |
| } |
| } else { |
| if (parent_count != parent_line_count) { |
| err = report(options, &commit->object, FSCK_MSG_MISSING_PARENT, "parent objects missing"); |
| if (err) |
| return err; |
| } |
| } |
| author_count = 0; |
| while (skip_prefix(buffer, "author ", &buffer)) { |
| author_count++; |
| err = fsck_ident(&buffer, &commit->object, options); |
| if (err) |
| return err; |
| } |
| if (author_count < 1) |
| err = report(options, &commit->object, FSCK_MSG_MISSING_AUTHOR, "invalid format - expected 'author' line"); |
| else if (author_count > 1) |
| err = report(options, &commit->object, FSCK_MSG_MULTIPLE_AUTHORS, "invalid format - multiple 'author' lines"); |
| if (err) |
| return err; |
| if (!skip_prefix(buffer, "committer ", &buffer)) |
| return report(options, &commit->object, FSCK_MSG_MISSING_COMMITTER, "invalid format - expected 'committer' line"); |
| err = fsck_ident(&buffer, &commit->object, options); |
| if (err) |
| return err; |
| if (!commit->tree) { |
| err = report(options, &commit->object, FSCK_MSG_BAD_TREE, "could not load commit's tree %s", sha1_to_hex(tree_sha1)); |
| if (err) |
| return err; |
| } |
| if (memchr(buffer_begin, '\0', size)) { |
| err = report(options, &commit->object, FSCK_MSG_NUL_IN_COMMIT, |
| "NUL byte in the commit object body"); |
| if (err) |
| return err; |
| } |
| return 0; |
| } |
| |
| static int fsck_commit(struct commit *commit, const char *data, |
| unsigned long size, struct fsck_options *options) |
| { |
| const char *buffer = data ? data : get_commit_buffer(commit, &size); |
| int ret = fsck_commit_buffer(commit, buffer, size, options); |
| if (!data) |
| unuse_commit_buffer(commit, buffer); |
| return ret; |
| } |
| |
| static int fsck_tag_buffer(struct tag *tag, const char *data, |
| unsigned long size, struct fsck_options *options) |
| { |
| unsigned char sha1[20]; |
| int ret = 0; |
| const char *buffer; |
| char *to_free = NULL, *eol; |
| struct strbuf sb = STRBUF_INIT; |
| |
| if (data) |
| buffer = data; |
| else { |
| enum object_type type; |
| |
| buffer = to_free = |
| read_sha1_file(tag->object.oid.hash, &type, &size); |
| if (!buffer) |
| return report(options, &tag->object, |
| FSCK_MSG_MISSING_TAG_OBJECT, |
| "cannot read tag object"); |
| |
| if (type != OBJ_TAG) { |
| ret = report(options, &tag->object, |
| FSCK_MSG_TAG_OBJECT_NOT_TAG, |
| "expected tag got %s", |
| type_name(type)); |
| goto done; |
| } |
| } |
| |
| ret = verify_headers(buffer, size, &tag->object, options); |
| if (ret) |
| goto done; |
| |
| if (!skip_prefix(buffer, "object ", &buffer)) { |
| ret = report(options, &tag->object, FSCK_MSG_MISSING_OBJECT, "invalid format - expected 'object' line"); |
| goto done; |
| } |
| if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') { |
| ret = report(options, &tag->object, FSCK_MSG_BAD_OBJECT_SHA1, "invalid 'object' line format - bad sha1"); |
| if (ret) |
| goto done; |
| } |
| buffer += 41; |
| |
| if (!skip_prefix(buffer, "type ", &buffer)) { |
| ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE_ENTRY, "invalid format - expected 'type' line"); |
| goto done; |
| } |
| eol = strchr(buffer, '\n'); |
| if (!eol) { |
| ret = report(options, &tag->object, FSCK_MSG_MISSING_TYPE, "invalid format - unexpected end after 'type' line"); |
| goto done; |
| } |
| if (type_from_string_gently(buffer, eol - buffer, 1) < 0) |
| ret = report(options, &tag->object, FSCK_MSG_BAD_TYPE, "invalid 'type' value"); |
| if (ret) |
| goto done; |
| buffer = eol + 1; |
| |
| if (!skip_prefix(buffer, "tag ", &buffer)) { |
| ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG_ENTRY, "invalid format - expected 'tag' line"); |
| goto done; |
| } |
| eol = strchr(buffer, '\n'); |
| if (!eol) { |
| ret = report(options, &tag->object, FSCK_MSG_MISSING_TAG, "invalid format - unexpected end after 'type' line"); |
| goto done; |
| } |
| strbuf_addf(&sb, "refs/tags/%.*s", (int)(eol - buffer), buffer); |
| if (check_refname_format(sb.buf, 0)) { |
| ret = report(options, &tag->object, FSCK_MSG_BAD_TAG_NAME, |
| "invalid 'tag' name: %.*s", |
| (int)(eol - buffer), buffer); |
| if (ret) |
| goto done; |
| } |
| buffer = eol + 1; |
| |
| if (!skip_prefix(buffer, "tagger ", &buffer)) { |
| /* early tags do not contain 'tagger' lines; warn only */ |
| ret = report(options, &tag->object, FSCK_MSG_MISSING_TAGGER_ENTRY, "invalid format - expected 'tagger' line"); |
| if (ret) |
| goto done; |
| } |
| else |
| ret = fsck_ident(&buffer, &tag->object, options); |
| |
| done: |
| strbuf_release(&sb); |
| free(to_free); |
| return ret; |
| } |
| |
| static int fsck_tag(struct tag *tag, const char *data, |
| unsigned long size, struct fsck_options *options) |
| { |
| struct object *tagged = tag->tagged; |
| |
| if (!tagged) |
| return report(options, &tag->object, FSCK_MSG_BAD_TAG_OBJECT, "could not load tagged object"); |
| |
| return fsck_tag_buffer(tag, data, size, options); |
| } |
| |
| struct fsck_gitmodules_data { |
| struct object *obj; |
| struct fsck_options *options; |
| int ret; |
| }; |
| |
| static int fsck_gitmodules_fn(const char *var, const char *value, void *vdata) |
| { |
| struct fsck_gitmodules_data *data = vdata; |
| const char *subsection, *key; |
| int subsection_len; |
| char *name; |
| |
| if (parse_config_key(var, "submodule", &subsection, &subsection_len, &key) < 0 || |
| !subsection) |
| return 0; |
| |
| name = xmemdupz(subsection, subsection_len); |
| if (check_submodule_name(name) < 0) |
| data->ret |= report(data->options, data->obj, |
| FSCK_MSG_GITMODULES_NAME, |
| "disallowed submodule name: %s", |
| name); |
| if (!strcmp(key, "url") && value && |
| looks_like_command_line_option(value)) |
| data->ret |= report(data->options, data->obj, |
| FSCK_MSG_GITMODULES_URL, |
| "disallowed submodule url: %s", |
| value); |
| if (!strcmp(key, "path") && value && |
| looks_like_command_line_option(value)) |
| data->ret |= report(data->options, data->obj, |
| FSCK_MSG_GITMODULES_PATH, |
| "disallowed submodule path: %s", |
| value); |
| if (!strcmp(key, "update") && value && |
| parse_submodule_update_type(value) == SM_UPDATE_COMMAND) |
| data->ret |= report(data->options, data->obj, |
| FSCK_MSG_GITMODULES_UPDATE, |
| "disallowed submodule update setting: %s", |
| value); |
| free(name); |
| |
| return 0; |
| } |
| |
| static int fsck_blob(struct blob *blob, const char *buf, |
| unsigned long size, struct fsck_options *options) |
| { |
| struct fsck_gitmodules_data data; |
| |
| if (!oidset_contains(&gitmodules_found, &blob->object.oid)) |
| return 0; |
| oidset_insert(&gitmodules_done, &blob->object.oid); |
| |
| if (!buf) { |
| /* |
| * A missing buffer here is a sign that the caller found the |
| * blob too gigantic to load into memory. Let's just consider |
| * that an error. |
| */ |
| return report(options, &blob->object, |
| FSCK_MSG_GITMODULES_PARSE, |
| ".gitmodules too large to parse"); |
| } |
| |
| data.obj = &blob->object; |
| data.options = options; |
| data.ret = 0; |
| if (git_config_from_mem(fsck_gitmodules_fn, CONFIG_ORIGIN_BLOB, |
| ".gitmodules", buf, size, &data)) |
| data.ret |= report(options, &blob->object, |
| FSCK_MSG_GITMODULES_PARSE, |
| "could not parse gitmodules blob"); |
| |
| return data.ret; |
| } |
| |
| int fsck_object(struct object *obj, void *data, unsigned long size, |
| struct fsck_options *options) |
| { |
| if (!obj) |
| return report(options, obj, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck"); |
| |
| if (obj->type == OBJ_BLOB) |
| return fsck_blob((struct blob *)obj, data, size, options); |
| if (obj->type == OBJ_TREE) |
| return fsck_tree((struct tree *) obj, options); |
| if (obj->type == OBJ_COMMIT) |
| return fsck_commit((struct commit *) obj, (const char *) data, |
| size, options); |
| if (obj->type == OBJ_TAG) |
| return fsck_tag((struct tag *) obj, (const char *) data, |
| size, options); |
| |
| return report(options, obj, FSCK_MSG_UNKNOWN_TYPE, "unknown type '%d' (internal fsck error)", |
| obj->type); |
| } |
| |
| int fsck_error_function(struct fsck_options *o, |
| struct object *obj, int msg_type, const char *message) |
| { |
| if (msg_type == FSCK_WARN) { |
| warning("object %s: %s", describe_object(o, obj), message); |
| return 0; |
| } |
| error("object %s: %s", describe_object(o, obj), message); |
| return 1; |
| } |
| |
| int fsck_finish(struct fsck_options *options) |
| { |
| int ret = 0; |
| struct oidset_iter iter; |
| const struct object_id *oid; |
| |
| oidset_iter_init(&gitmodules_found, &iter); |
| while ((oid = oidset_iter_next(&iter))) { |
| struct blob *blob; |
| enum object_type type; |
| unsigned long size; |
| char *buf; |
| |
| if (oidset_contains(&gitmodules_done, oid)) |
| continue; |
| |
| blob = lookup_blob(oid); |
| if (!blob) { |
| ret |= report(options, &blob->object, |
| FSCK_MSG_GITMODULES_BLOB, |
| "non-blob found at .gitmodules"); |
| continue; |
| } |
| |
| buf = read_sha1_file(oid->hash, &type, &size); |
| if (!buf) { |
| if (is_promisor_object(&blob->object.oid)) |
| continue; |
| ret |= report(options, &blob->object, |
| FSCK_MSG_GITMODULES_MISSING, |
| "unable to read .gitmodules blob"); |
| continue; |
| } |
| |
| if (type == OBJ_BLOB) |
| ret |= fsck_blob(blob, buf, size, options); |
| else |
| ret |= report(options, &blob->object, |
| FSCK_MSG_GITMODULES_BLOB, |
| "non-blob found at .gitmodules"); |
| free(buf); |
| } |
| |
| |
| oidset_clear(&gitmodules_found); |
| oidset_clear(&gitmodules_done); |
| return ret; |
| } |