diff options
Diffstat (limited to 'fsck.c')
| -rw-r--r-- | fsck.c | 696 |
1 files changed, 575 insertions, 121 deletions
@@ -6,8 +6,296 @@ #include "commit.h" #include "tag.h" #include "fsck.h" +#include "refs.h" +#include "utf8.h" +#include "sha1-array.h" + +#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_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) \ + /* 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) \ + /* 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 sha1_array skiplist = SHA1_ARRAY_INIT; + int sorted, fd; + char buffer[41]; + unsigned char sha1[20]; + + 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 (;;) { + int result = read_in_full(fd, buffer, sizeof(buffer)); + if (result < 0) + die_errno("Could not read '%s'", path); + if (!result) + break; + if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n') + die("Invalid SHA-1: %s", buffer); + sha1_array_append(&skiplist, sha1); + if (sorted && skiplist.nr > 1 && + hashcmp(skiplist.sha1[skiplist.nr - 2], + sha1) > 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 = xmalloc(sizeof(int) * 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 && + sha1_array_lookup(options->skiplist, object->sha1) >= 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); -static int fsck_walk_tree(struct tree *tree, fsck_walk_func walk, void *data) + va_start(ap, fmt); + strbuf_vaddf(&sb, fmt, ap); + result = options->error_func(object, msg_type, sb.buf); + strbuf_release(&sb); + va_end(ap); + + return result; +} + +static int fsck_walk_tree(struct tree *tree, void *data, struct fsck_options *options) { struct tree_desc desc; struct name_entry entry; @@ -23,11 +311,11 @@ static int fsck_walk_tree(struct tree *tree, fsck_walk_func walk, void *data) if (S_ISGITLINK(entry.mode)) continue; if (S_ISDIR(entry.mode)) - result = walk(&lookup_tree(entry.sha1)->object, OBJ_TREE, data); + result = options->walk(&lookup_tree(entry.sha1)->object, OBJ_TREE, data, options); else if (S_ISREG(entry.mode) || S_ISLNK(entry.mode)) - result = walk(&lookup_blob(entry.sha1)->object, OBJ_BLOB, data); + result = options->walk(&lookup_blob(entry.sha1)->object, OBJ_BLOB, data, options); else { - result = error("in tree %s: entry %s has bad mode %.6o\n", + result = error("in tree %s: entry %s has bad mode %.6o", sha1_to_hex(tree->object.sha1), entry.path, entry.mode); } if (result < 0) @@ -38,7 +326,7 @@ static int fsck_walk_tree(struct tree *tree, fsck_walk_func walk, void *data) return res; } -static int fsck_walk_commit(struct commit *commit, fsck_walk_func walk, void *data) +static int fsck_walk_commit(struct commit *commit, void *data, struct fsck_options *options) { struct commit_list *parents; int res; @@ -47,14 +335,14 @@ static int fsck_walk_commit(struct commit *commit, fsck_walk_func walk, void *da if (parse_commit(commit)) return -1; - result = walk((struct object *)commit->tree, OBJ_TREE, data); + result = options->walk((struct object *)commit->tree, OBJ_TREE, data, options); if (result < 0) return result; res = result; parents = commit->parents; while (parents) { - result = walk((struct object *)parents->item, OBJ_COMMIT, data); + result = options->walk((struct object *)parents->item, OBJ_COMMIT, data, options); if (result < 0) return result; if (!res) @@ -64,14 +352,14 @@ static int fsck_walk_commit(struct commit *commit, fsck_walk_func walk, void *da return res; } -static int fsck_walk_tag(struct tag *tag, fsck_walk_func walk, void *data) +static int fsck_walk_tag(struct tag *tag, void *data, struct fsck_options *options) { if (parse_tag(tag)) return -1; - return walk(tag->tagged, OBJ_ANY, data); + return options->walk(tag->tagged, OBJ_ANY, data, options); } -int fsck_walk(struct object *obj, fsck_walk_func walk, void *data) +int fsck_walk(struct object *obj, void *data, struct fsck_options *options) { if (!obj) return -1; @@ -79,11 +367,11 @@ int fsck_walk(struct object *obj, fsck_walk_func walk, void *data) case OBJ_BLOB: return 0; case OBJ_TREE: - return fsck_walk_tree((struct tree *)obj, walk, data); + return fsck_walk_tree((struct tree *)obj, data, options); case OBJ_COMMIT: - return fsck_walk_commit((struct commit *)obj, walk, data); + return fsck_walk_commit((struct commit *)obj, data, options); case OBJ_TAG: - return fsck_walk_tag((struct tag *)obj, walk, data); + return fsck_walk_tag((struct tag *)obj, data, options); default: error("Unknown object type for %s", sha1_to_hex(obj->sha1)); return -1; @@ -136,11 +424,15 @@ static int verify_ordered(unsigned mode1, const char *name1, unsigned mode2, con return c1 < c2 ? 0 : TREE_UNORDERED; } -static int fsck_tree(struct tree *item, int strict, fsck_error error_func) +static int fsck_tree(struct tree *item, struct fsck_options *options) { int retval; + 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; @@ -157,13 +449,18 @@ static int fsck_tree(struct tree *item, int strict, fsck_error error_func) while (desc.size) { unsigned mode; const char *name; - - tree_entry_extract(&desc, &name, &mode); - - if (strchr(name, '/')) - has_full_path = 1; - if (!*name) - has_empty_name = 1; + const unsigned char *sha1; + + sha1 = tree_entry_extract(&desc, &name, &mode); + + has_null_sha1 |= is_null_sha1(sha1); + has_full_path |= !!strchr(name, '/'); + has_empty_name |= !*name; + has_dot |= !strcmp(name, "."); + has_dotdot |= !strcmp(name, ".."); + has_dotgit |= (!strcmp(name, ".git") || + is_hfs_dotgit(name) || + is_ntfs_dotgit(name)); has_zero_pad |= *(char *)desc.buffer == '0'; update_tree_entry(&desc); @@ -183,7 +480,7 @@ static int fsck_tree(struct tree *item, int strict, fsck_error error_func) * bits.. */ case S_IFREG | 0664: - if (!strict) + if (!options->strict) break; default: has_bad_modes = 1; @@ -207,157 +504,314 @@ static int fsck_tree(struct tree *item, int strict, fsck_error error_func) } retval = 0; + if (has_null_sha1) + retval += report(options, &item->object, FSCK_MSG_NULL_SHA1, "contains entries pointing to null sha1"); if (has_full_path) - retval += error_func(&item->object, FSCK_WARN, "contains full pathnames"); + retval += report(options, &item->object, FSCK_MSG_FULL_PATHNAME, "contains full pathnames"); if (has_empty_name) - retval += error_func(&item->object, FSCK_WARN, "contains empty pathname"); + 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 += error_func(&item->object, FSCK_WARN, "contains zero-padded file modes"); + retval += report(options, &item->object, FSCK_MSG_ZERO_PADDED_FILEMODE, "contains zero-padded file modes"); if (has_bad_modes) - retval += error_func(&item->object, FSCK_WARN, "contains bad file modes"); + retval += report(options, &item->object, FSCK_MSG_BAD_FILEMODE, "contains bad file modes"); if (has_dup_entries) - retval += error_func(&item->object, FSCK_ERROR, "contains duplicate file entries"); + retval += report(options, &item->object, FSCK_MSG_DUPLICATE_ENTRIES, "contains duplicate file entries"); if (not_properly_sorted) - retval += error_func(&item->object, FSCK_ERROR, "not properly sorted"); + retval += report(options, &item->object, FSCK_MSG_TREE_NOT_SORTED, "not properly sorted"); return retval; } -static int fsck_ident(char **ident, struct object *obj, fsck_error error_func) +static int verify_headers(const void *data, unsigned long size, + struct object *obj, struct fsck_options *options) { - if (**ident == '<') - return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing space before email"); - *ident += strcspn(*ident, "<>\n"); - if (**ident == '>') - return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad name"); - if (**ident != '<') - return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing email"); - if ((*ident)[-1] != ' ') - return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing space before email"); - (*ident)++; - *ident += strcspn(*ident, "<>\n"); - if (**ident != '>') - return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad email"); - (*ident)++; - if (**ident != ' ') - return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing space before date"); - (*ident)++; - if (**ident == '0' && (*ident)[1] != ' ') - return error_func(obj, FSCK_ERROR, "invalid author/committer line - zero-padded date"); - *ident += strspn(*ident, "0123456789"); - if (**ident != ' ') - return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad date"); - (*ident)++; - if ((**ident != '+' && **ident != '-') || - !isdigit((*ident)[1]) || - !isdigit((*ident)[2]) || - !isdigit((*ident)[3]) || - !isdigit((*ident)[4]) || - ((*ident)[5] != '\n')) - return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad time zone"); - (*ident) += 6; + 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(strtoul(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(struct commit *commit, fsck_error error_func) +static int fsck_commit_buffer(struct commit *commit, const char *buffer, + unsigned long size, struct fsck_options *options) { - char *buffer = commit->buffer; unsigned char tree_sha1[20], sha1[20]; struct commit_graft *graft; - int parents = 0; + unsigned parent_count, parent_line_count = 0, author_count; int err; - if (commit->date == ULONG_MAX) - return error_func(&commit->object, FSCK_ERROR, "invalid author/committer line"); - - if (memcmp(buffer, "tree ", 5)) - return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'tree' line"); - if (get_sha1_hex(buffer+5, tree_sha1) || buffer[45] != '\n') - return error_func(&commit->object, FSCK_ERROR, "invalid 'tree' line format - bad sha1"); - buffer += 46; - while (!memcmp(buffer, "parent ", 7)) { - if (get_sha1_hex(buffer+7, sha1) || buffer[47] != '\n') - return error_func(&commit->object, FSCK_ERROR, "invalid 'parent' line format - bad sha1"); - buffer += 48; - parents++; + 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.sha1); + parent_count = commit_list_count(commit->parents); if (graft) { - struct commit_list *p = commit->parents; - parents = 0; - while (p) { - p = p->next; - parents++; - } - if (graft->nr_parent == -1 && !parents) + if (graft->nr_parent == -1 && !parent_count) ; /* shallow commit */ - else if (graft->nr_parent != parents) - return error_func(&commit->object, FSCK_ERROR, "graft objects missing"); + else if (graft->nr_parent != parent_count) { + err = report(options, &commit->object, FSCK_MSG_MISSING_GRAFT, "graft objects missing"); + if (err) + return err; + } } else { - struct commit_list *p = commit->parents; - while (p && parents) { - p = p->next; - parents--; + if (parent_count != parent_line_count) { + err = report(options, &commit->object, FSCK_MSG_MISSING_PARENT, "parent objects missing"); + if (err) + return err; } - if (p || parents) - return error_func(&commit->object, FSCK_ERROR, "parent objects missing"); } - if (memcmp(buffer, "author ", 7)) - return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'author' line"); - buffer += 7; - err = fsck_ident(&buffer, &commit->object, error_func); + 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 (memcmp(buffer, "committer ", strlen("committer "))) - return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'committer' line"); - buffer += strlen("committer "); - err = fsck_ident(&buffer, &commit->object, error_func); + 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) - return error_func(&commit->object, FSCK_ERROR, "could not load commit's tree %s", sha1_to_hex(tree_sha1)); + return report(options, &commit->object, FSCK_MSG_BAD_TREE, "could not load commit's tree %s", sha1_to_hex(tree_sha1)); return 0; } -static int fsck_tag(struct tag *tag, fsck_error error_func) +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.sha1, &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", + typename(type)); + goto done; + } + } + + if (verify_headers(buffer, size, &tag->object, options)) + 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 error_func(&tag->object, FSCK_ERROR, "could not load tagged object"); - return 0; + return report(options, &tag->object, FSCK_MSG_BAD_TAG_OBJECT, "could not load tagged object"); + + return fsck_tag_buffer(tag, data, size, options); } -int fsck_object(struct object *obj, int strict, fsck_error error_func) +int fsck_object(struct object *obj, void *data, unsigned long size, + struct fsck_options *options) { if (!obj) - return error_func(obj, FSCK_ERROR, "no valid object to fsck"); + return report(options, obj, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck"); if (obj->type == OBJ_BLOB) return 0; if (obj->type == OBJ_TREE) - return fsck_tree((struct tree *) obj, strict, error_func); + return fsck_tree((struct tree *) obj, options); if (obj->type == OBJ_COMMIT) - return fsck_commit((struct commit *) obj, error_func); + return fsck_commit((struct commit *) obj, (const char *) data, + size, options); if (obj->type == OBJ_TAG) - return fsck_tag((struct tag *) obj, error_func); + return fsck_tag((struct tag *) obj, (const char *) data, + size, options); - return error_func(obj, FSCK_ERROR, "unknown type '%d' (internal fsck error)", + return report(options, obj, FSCK_MSG_UNKNOWN_TYPE, "unknown type '%d' (internal fsck error)", obj->type); } -int fsck_error_function(struct object *obj, int type, const char *fmt, ...) +int fsck_error_function(struct object *obj, int msg_type, const char *message) { - va_list ap; - struct strbuf sb = STRBUF_INIT; - - strbuf_addf(&sb, "object %s:", sha1_to_hex(obj->sha1)); - - va_start(ap, fmt); - strbuf_vaddf(&sb, fmt, ap); - va_end(ap); - - error("%s", sb.buf); - strbuf_release(&sb); + if (msg_type == FSCK_WARN) { + warning("object %s: %s", sha1_to_hex(obj->sha1), message); + return 0; + } + error("object %s: %s", sha1_to_hex(obj->sha1), message); return 1; } |